Mercurial > hg > freeDiameter
annotate include/freeDiameter/libfreeDiameter.h @ 22:0b3b46da2c12
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| author | Sebastien Decugis <sdecugis@nict.go.jp> |
|---|---|
| date | Mon, 19 Oct 2009 18:43:09 +0900 |
| parents | 277ec00d793e |
| children | db6c40b8b307 |
| rev | line source |
|---|---|
| 0 | 1 /********************************************************************************************************* |
| 2 * Software License Agreement (BSD License) * | |
| 3 * Author: Sebastien Decugis <sdecugis@nict.go.jp> * | |
| 4 * * | |
| 5 * Copyright (c) 2009, WIDE Project and NICT * | |
| 6 * All rights reserved. * | |
| 7 * * | |
| 8 * Redistribution and use of this software in source and binary forms, with or without modification, are * | |
| 9 * permitted provided that the following conditions are met: * | |
| 10 * * | |
| 11 * * Redistributions of source code must retain the above * | |
| 12 * copyright notice, this list of conditions and the * | |
| 13 * following disclaimer. * | |
| 14 * * | |
| 15 * * Redistributions in binary form must reproduce the above * | |
| 16 * copyright notice, this list of conditions and the * | |
| 17 * following disclaimer in the documentation and/or other * | |
| 18 * materials provided with the distribution. * | |
| 19 * * | |
| 20 * * Neither the name of the WIDE Project or NICT nor the * | |
| 21 * names of its contributors may be used to endorse or * | |
| 22 * promote products derived from this software without * | |
| 23 * specific prior written permission of WIDE Project and * | |
| 24 * NICT. * | |
| 25 * * | |
| 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED * | |
| 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * | |
| 28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * | |
| 29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * | |
| 30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * | |
| 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * | |
| 32 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * | |
| 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * | |
| 34 *********************************************************************************************************/ | |
| 35 | |
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36 /* This file contains the definitions of functions and types used by the libfreeDiameter library. |
| 0 | 37 * |
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38 * This library is meant to be used by both the freeDiameter daemon and its extensions. |
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39 * It provides the tools to manipulate Diameter messages and related data. |
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40 * This file should always be included as #include <freeDiameter/libfreeDiameter.h> |
| 0 | 41 * |
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42 * The file contains the following parts: |
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43 * DEBUG |
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44 * MACROS |
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45 * THREADS |
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46 * LISTS |
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47 * DICTIONARY |
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48 * SESSIONS |
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49 * MESSAGES |
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50 * DISPATCH |
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51 * QUEUES |
| 0 | 52 */ |
| 53 | |
| 54 #ifndef _LIBFREEDIAMETER_H | |
| 55 #define _LIBFREEDIAMETER_H | |
| 56 | |
| 57 #ifndef FD_IS_CONFIG | |
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58 #error "You must include 'freeDiameter-host.h' before this file." |
| 0 | 59 #endif /* FD_IS_CONFIG */ |
| 60 | |
| 61 #include <pthread.h> | |
| 62 #include <string.h> | |
| 63 #include <assert.h> | |
| 64 #include <errno.h> | |
| 65 #include <arpa/inet.h> | |
| 66 #include <sys/socket.h> | |
| 67 #include <netdb.h> | |
| 68 #include <stdio.h> | |
| 69 #include <stdlib.h> | |
| 70 #include <unistd.h> | |
| 71 | |
| 72 /*============================================================*/ | |
| 73 /* DEBUG */ | |
| 74 /*============================================================*/ | |
| 75 #ifndef ASSERT | |
| 76 #define ASSERT(x) assert(x) | |
| 77 #endif /* ASSERT */ | |
| 78 | |
| 79 /* | |
| 80 * FUNCTION: fd_log_debug | |
| 81 * | |
| 82 * PARAMETERS: | |
| 83 * format : Same format string as in the printf function | |
| 84 * ... : Same list as printf | |
| 85 * | |
| 86 * DESCRIPTION: | |
| 87 * Log internal information for use of developpers only. | |
| 88 * The format and arguments may contain UTF-8 encoded data. The | |
| 89 * output medium (file or console) is expected to support this encoding. | |
| 90 * | |
| 91 * This function assumes that a global mutex called "fd_log_lock" exists | |
| 92 * in the address space of the current process. | |
| 93 * | |
| 94 * RETURN VALUE: | |
| 95 * None. | |
| 96 */ | |
| 97 void fd_log_debug ( char * format, ... ); | |
| 98 extern pthread_mutex_t fd_log_lock; | |
| 99 | |
| 100 /* | |
| 101 * FUNCTION: fd_log_threadname | |
| 102 * | |
| 103 * PARAMETERS: | |
| 104 * name : \0-terminated string containing a name to identify the current thread. | |
| 105 * | |
| 106 * DESCRIPTION: | |
| 107 * Name the current thread, useful for debugging multi-threaded problems. | |
| 108 * | |
| 109 * This function assumes that a global thread-specific key called "fd_log_thname" exists | |
| 110 * in the address space of the current process. | |
| 111 * | |
| 112 * RETURN VALUE: | |
| 113 * None. | |
| 114 */ | |
| 115 void fd_log_threadname ( char * name ); | |
| 116 extern pthread_key_t fd_log_thname; | |
| 117 | |
| 118 /* | |
| 119 * FUNCTION: fd_log_time | |
| 120 * | |
| 121 * PARAMETERS: | |
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122 * ts : The timestamp to log, or NULL for "now" |
| 0 | 123 * buf : An array where the time must be stored |
| 124 * len : size of the buffer | |
| 125 * | |
| 126 * DESCRIPTION: | |
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127 * Writes the timestamp (in human readable format) in a buffer. |
| 0 | 128 * |
| 129 * RETURN VALUE: | |
| 130 * pointer to buf. | |
| 131 */ | |
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132 char * fd_log_time ( struct timespec * ts, char * buf, size_t len ); |
| 0 | 133 |
| 134 | |
| 135 /* levels definitions */ | |
| 136 #define NONE 0 /* Display no debug message */ | |
| 137 #define INFO 1 /* Display errors only */ | |
| 138 #define FULL 2 /* Display additional information to follow code execution */ | |
| 139 #define ANNOYING 4 /* Very verbose, for example in loops */ | |
| 140 #define FCTS 6 /* Display entry parameters of most functions */ | |
| 141 #define CALL 9 /* Display calls to most functions (with CHECK macros) */ | |
| 142 | |
| 143 /* Default level is INFO */ | |
| 144 #ifndef TRACE_LEVEL | |
| 145 #define TRACE_LEVEL INFO | |
| 146 #endif /* TRACE_LEVEL */ | |
| 147 | |
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148 /* The level of the file being compiled. */ |
| 0 | 149 static int local_debug_level = TRACE_LEVEL; |
| 150 | |
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151 /* A global level, changed by configuration or cmd line for example. default is 0. */ |
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152 extern int fd_g_debug_lvl; |
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153 |
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154 /* Some portability code to get nice function name in __PRETTY_FUNCTION__ */ |
| 0 | 155 #if __STDC_VERSION__ < 199901L |
| 156 # if __GNUC__ >= 2 | |
| 157 # define __func__ __FUNCTION__ | |
| 158 # else /* __GNUC__ >= 2 */ | |
| 159 # define __func__ "<unknown>" | |
| 160 # endif /* __GNUC__ >= 2 */ | |
| 161 #endif /* __STDC_VERSION__ < 199901L */ | |
| 162 #ifndef __PRETTY_FUNCTION__ | |
| 163 #define __PRETTY_FUNCTION__ __func__ | |
| 164 #endif /* __PRETTY_FUNCTION__ */ | |
| 165 | |
| 166 /* Boolean for tracing at a certain level */ | |
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167 #define TRACE_BOOL(_level_) ( (_level_) <= local_debug_level + fd_g_debug_lvl ) |
| 0 | 168 |
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169 /* The general debug macro, each call results in two lines of debug messages (change the macro for more compact output) */ |
| 0 | 170 #define TRACE_DEBUG(level,format,args... ) { \ |
| 171 if ( TRACE_BOOL(level) ) { \ | |
| 172 char __buf[25]; \ | |
| 173 char * __thn = ((char *)pthread_getspecific(fd_log_thname) ?: "unnamed"); \ | |
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174 fd_log_debug("\t | tid:%-20s\t%s\tin %s@%s:%d\n" \ |
| 0 | 175 "\t%s|%*s" format "\n", \ |
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176 __thn, fd_log_time(NULL, __buf, sizeof(__buf)), __PRETTY_FUNCTION__, __FILE__, __LINE__, \ |
| 0 | 177 (level < FULL)?"@":" ",level, "", ## args); \ |
| 178 } \ | |
| 179 } | |
| 180 | |
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181 /* Helper for function entry -- for very detailed trace of the execution */ |
| 0 | 182 #define TRACE_ENTRY(_format,_args... ) \ |
| 183 TRACE_DEBUG(FCTS, "->%s (" #_args ") = (" _format ") >", __PRETTY_FUNCTION__, ##_args ); | |
| 184 | |
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185 /* Helper for debugging by adding traces -- for debuging a specific location of the code */ |
| 0 | 186 #define TRACE_HERE() \ |
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187 TRACE_DEBUG(NONE, " -- debug checkpoint -- "); |
| 0 | 188 |
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189 /* Helper for tracing the CHECK_* macros bellow -- very very verbose code execution! */ |
| 0 | 190 #define TRACE_DEBUG_ALL( str ) \ |
| 191 TRACE_DEBUG(CALL, str ); | |
| 192 | |
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193 /* For development only, to keep track of TODO locations in the code */ |
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194 #ifndef ERRORS_ON_TODO |
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195 #define TODO( _msg, _args... ) \ |
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196 TRACE_DEBUG(NONE, "TODO: " _msg , ##_args); |
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197 #else /* ERRORS_ON_TODO */ |
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198 #define TODO( _msg, _args... ) \ |
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199 "TODO" = _msg ## _args; /* just a stupid compilation error to spot the todo */ |
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200 #endif /* ERRORS_ON_TODO */ |
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201 |
| 0 | 202 |
| 203 /* Macros to check a return value and branch out in case of error. | |
| 204 * These macro must be used only when errors are highly improbable, not for expected errors. | |
| 205 */ | |
| 206 | |
| 207 /* Check the return value of a system function and execute fallback in case of error */ | |
| 208 #define CHECK_SYS_DO( __call__, __fallback__ ) { \ | |
| 209 int __ret__; \ | |
| 210 TRACE_DEBUG_ALL( "Check SYS: " #__call__ ); \ | |
| 211 __ret__ = (__call__); \ | |
| 212 if (__ret__ < 0) { \ | |
| 213 int __err__ = errno; /* We may handle EINTR here */ \ | |
| 214 TRACE_DEBUG(NONE, "ERROR: in '" #__call__ "' :\t%s", strerror(__err__));\ | |
| 215 __fallback__; \ | |
| 216 } \ | |
| 217 } | |
| 218 /* Check the return value of a system function, return error code on error */ | |
| 219 #define CHECK_SYS( __call__ ) { \ | |
| 220 int __ret__; \ | |
| 221 TRACE_DEBUG_ALL( "Check SYS: " #__call__ ); \ | |
| 222 __ret__ = (__call__); \ | |
| 223 if (__ret__ < 0) { \ | |
| 224 int __err__ = errno; /* We may handle EINTR here */ \ | |
| 225 TRACE_DEBUG(NONE, "ERROR: in '" #__call__ "' :\t%s", strerror(__err__));\ | |
| 226 return __err__; \ | |
| 227 } \ | |
| 228 } | |
| 229 | |
| 230 /* Check the return value of a POSIX function and execute fallback in case of error or special value */ | |
| 231 #define CHECK_POSIX_DO2( __call__, __speval__, __fallback1__, __fallback2__ ) { \ | |
| 232 int __ret__; \ | |
| 233 TRACE_DEBUG_ALL( "Check POSIX: " #__call__ ); \ | |
| 234 __ret__ = (__call__); \ | |
| 235 if (__ret__ != 0) { \ | |
| 236 if (__ret__ == (__speval__)) { \ | |
| 237 __fallback1__; \ | |
| 238 } else { \ | |
| 239 TRACE_DEBUG(NONE, "ERROR: in '" #__call__ "':\t%s", strerror(__ret__)); \ | |
| 240 __fallback2__; \ | |
| 241 } \ | |
| 242 } \ | |
| 243 } | |
| 244 | |
| 245 /* Check the return value of a POSIX function and execute fallback in case of error */ | |
| 246 #define CHECK_POSIX_DO( __call__, __fallback__ ) \ | |
| 247 CHECK_POSIX_DO2( (__call__), 0, , __fallback__ ); | |
| 248 | |
| 249 /* Check the return value of a POSIX function and return it if error */ | |
| 250 #define CHECK_POSIX( __call__ ) { \ | |
| 251 int __v__; \ | |
| 252 CHECK_POSIX_DO( __v__ = (__call__), return __v__ ); \ | |
| 253 } | |
| 254 | |
| 255 /* Check that a memory allocator did not return NULL, otherwise log an error and execute fallback */ | |
| 256 #define CHECK_MALLOC_DO( __call__, __fallback__ ) { \ | |
| 257 void * __ret__; \ | |
| 258 TRACE_DEBUG_ALL( "Check MALLOC: " #__call__ ); \ | |
| 259 __ret__ = (void *)( __call__ ); \ | |
| 260 if (__ret__ == NULL) { \ | |
| 261 int __err__ = errno; \ | |
| 262 TRACE_DEBUG(NONE, "ERROR: in '" #__call__ "':\t%s", strerror(__err__)); \ | |
| 263 __fallback__; \ | |
| 264 } \ | |
| 265 } | |
| 266 | |
| 267 /* Check that a memory allocator did not return NULL, otherwise return ENOMEM */ | |
| 268 #define CHECK_MALLOC( __call__ ) \ | |
| 269 CHECK_MALLOC_DO( __call__, return ENOMEM ); | |
| 270 | |
| 271 | |
| 272 /* The next macros can be used also for expected errors */ | |
| 273 | |
| 274 /* Check parameters at function entry, execute fallback on error */ | |
| 275 #define CHECK_PARAMS_DO( __bool__, __fallback__ ) \ | |
| 276 TRACE_DEBUG_ALL( "Check PARAMS: " #__bool__ ); \ | |
| 277 if ( ! (__bool__) ) { \ | |
| 278 TRACE_DEBUG(INFO, "Invalid parameter received in '" #__bool__ "'"); \ | |
| 279 __fallback__; \ | |
| 280 } | |
| 281 /* Check parameters at function entry, return EINVAL if the boolean is false (similar to assert) */ | |
| 282 #define CHECK_PARAMS( __bool__ ) \ | |
| 283 CHECK_PARAMS_DO( __bool__, return EINVAL ); | |
| 284 | |
| 285 /* Check the return value of an internal function, log and propagate */ | |
| 286 #define CHECK_FCT_DO( __call__, __fallback__ ) { \ | |
| 287 int __ret__; \ | |
| 288 TRACE_DEBUG_ALL( "Check FCT: " #__call__ ); \ | |
| 289 __ret__ = (__call__); \ | |
| 290 if (__ret__ != 0) { \ | |
| 291 TRACE_DEBUG(INFO, "Error in '" #__call__ "':\t%s", strerror(__ret__)); \ | |
| 292 __fallback__; \ | |
| 293 } \ | |
| 294 } | |
| 295 /* Check the return value of a function call, return any error code */ | |
| 296 #define CHECK_FCT( __call__ ) { \ | |
| 297 int __v__; \ | |
| 298 CHECK_FCT_DO( __v__ = (__call__), return __v__ ); \ | |
| 299 } | |
| 300 | |
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301 |
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302 /*============================================================*/ |
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303 /* MACROS */ |
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304 /*============================================================*/ |
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305 |
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306 /* helper macros (pre-processor hacks to allow macro arguments) */ |
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307 #define __str( arg ) #arg |
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308 #define _stringize( arg ) __str( arg ) |
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309 #define __agr( arg1, arg2 ) arg1 ## arg2 |
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310 #define _aggregate( arg1, arg2 ) __agr( arg1, arg2 ) |
| 0 | 311 |
| 312 /* Some aliases to socket addresses structures */ | |
| 313 #define sSS struct sockaddr_storage | |
| 314 #define sSA struct sockaddr | |
| 315 #define sSA4 struct sockaddr_in | |
| 316 #define sSA6 struct sockaddr_in6 | |
| 317 | |
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318 /* Dump one sockaddr Node information */ |
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319 #define sSA_DUMP_NODE( sa, flag ) { \ |
| 0 | 320 sSA * __sa = (sSA *)(sa); \ |
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321 char __addrbuf[INET6_ADDRSTRLEN]; \ |
| 0 | 322 if (__sa) { \ |
| 323 int __rc = getnameinfo(__sa, \ | |
| 324 sizeof(sSS), \ | |
| 325 __addrbuf, \ | |
| 326 sizeof(__addrbuf), \ | |
| 327 NULL, \ | |
| 328 0, \ | |
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329 flag); \ |
| 0 | 330 if (__rc) \ |
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331 fd_log_debug((char *)gai_strerror(__rc)); \ |
| 0 | 332 else \ |
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333 fd_log_debug(&__addrbuf[0]); \ |
| 0 | 334 } else { \ |
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335 fd_log_debug("(NULL / ANY)"); \ |
| 0 | 336 } \ |
| 337 } | |
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338 /* if needed, add sSA_DUMP_SERVICE */ |
| 0 | 339 |
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340 /* A l4 protocol name (TCP / SCTP) */ |
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341 #define IPPROTO_NAME( _proto ) \ |
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342 ( ((_proto) == IPPROTO_TCP) ? "TCP" : \ |
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343 (((_proto) == IPPROTO_SCTP) ? "SCTP" : \ |
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344 "Unknown")) |
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345 |
| 0 | 346 /* The sockaddr length of a sSS structure */ |
| 347 #define sSSlen( _ss_ ) \ | |
| 348 ( (socklen_t) ( ((_ss_)->ss_family == AF_INET) ? (sizeof(sSA4)) : \ | |
| 349 (((_ss_)->ss_family == AF_INET6) ? (sizeof(sSA6)) : \ | |
| 350 0 ) ) ) | |
| 351 | |
| 352 /* Define the value of IP loopback address */ | |
| 353 #ifndef INADDR_LOOPBACK | |
| 354 #define INADDR_LOOPBACK inet_addr("127.0.0.1") | |
| 355 #endif /* INADDR_LOOPBACK */ | |
| 356 | |
| 357 /* create a V4MAPPED address */ | |
| 358 #define IN6_ADDR_V4MAP( a6, a4 ) { \ | |
| 359 ((uint32_t *)(a6))[0] = 0; \ | |
| 360 ((uint32_t *)(a6))[1] = 0; \ | |
| 361 ((uint32_t *)(a6))[2] = htonl(0xffff); \ | |
| 362 ((uint32_t *)(a6))[3] = (uint32_t)(a4); \ | |
| 363 } | |
| 364 | |
| 365 /* Retrieve a v4 value from V4MAPPED address ( takes a s6_addr as param) */ | |
| 366 #define IN6_ADDR_V4UNMAP( a6 ) \ | |
| 367 (((in_addr_t *)(a6))[3]) | |
| 368 | |
| 369 | |
| 370 /* We provide macros to convert 64 bit values to and from network byte-order, on systems where it is not already provided. */ | |
| 371 #ifndef HAVE_NTOHLL /* Defined in config.h, if the ntohll symbol is defined on the system */ | |
| 372 # if HOST_BIG_ENDIAN | |
| 373 /* In big-endian systems, we don't have to change the values, since the order is the same as network */ | |
| 374 # define ntohll(x) (x) | |
| 375 # define htonll(x) (x) | |
| 376 # else /* HOST_BIG_ENDIAN */ | |
| 377 /* For these systems, we must reverse the bytes. Use ntohl and htonl on sub-32 blocs, and inverse these blocs. */ | |
| 378 # define ntohll(x) (typeof (x))( (((uint64_t)ntohl( (uint32_t)(x))) << 32 ) | ((uint64_t) ntohl( ((uint64_t)(x)) >> 32 ))) | |
| 379 # define htonll(x) (typeof (x))( (((uint64_t)htonl( (uint32_t)(x))) << 32 ) | ((uint64_t) htonl( ((uint64_t)(x)) >> 32 ))) | |
| 380 # endif /* HOST_BIG_ENDIAN */ | |
| 381 #endif /* HAVE_NTOHLL */ | |
| 382 | |
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383 /* This macro will give the next multiple of 4 for an integer (used for padding sizes of AVP). */ |
| 0 | 384 #define PAD4(_x) ((_x) + ( (4 - (_x)) & 3 ) ) |
| 385 | |
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386 /* Useful to display as safe ASCII a value (will garbage UTF-8 output...) */ |
| 0 | 387 #define ASCII(_c) ( ((_c < 32) || (_c > 127)) ? ( _c ? '?' : ' ' ) : _c ) |
| 388 | |
| 389 /* Compare timespec structures */ | |
| 390 #define TS_IS_INFERIOR( ts1, ts2 ) \ | |
| 391 ( ((ts1)->tv_sec < (ts2)->tv_sec ) \ | |
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392 || (((ts1)->tv_sec == (ts2)->tv_sec ) && ((ts1)->tv_nsec < (ts2)->tv_nsec) )) |
| 0 | 393 |
| 394 | |
| 395 /*============================================================*/ | |
| 396 /* THREADS */ | |
| 397 /*============================================================*/ | |
| 398 | |
| 399 /* Terminate a thread */ | |
| 400 static __inline__ int fd_thr_term(pthread_t * th) | |
| 401 { | |
| 402 int ret = 0; | |
| 403 void * th_ret = NULL; | |
| 404 | |
| 405 CHECK_PARAMS(th); | |
| 406 | |
| 407 /* Test if it was already terminated */ | |
| 408 if (*th == (pthread_t)NULL) | |
| 409 return 0; | |
| 410 | |
| 411 /* Cancel the thread if it is still running - ignore error if it was already terminated */ | |
| 412 (void) pthread_cancel(*th); | |
| 413 | |
| 414 /* Then join the thread */ | |
| 415 CHECK_POSIX_DO( ret = pthread_join(*th, &th_ret), /* continue */ ); | |
| 416 | |
| 417 if (th_ret != NULL) { | |
| 418 TRACE_DEBUG(FULL, "The thread returned the following value: %p (ignored)", th_ret); | |
| 419 } | |
| 420 | |
| 421 /* Clean the location */ | |
| 422 *th = (pthread_t)NULL; | |
| 423 | |
| 424 return ret; | |
| 425 } | |
| 426 | |
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427 /* Cleanups for cancellation (all threads should be safely cancelable...) */ |
| 0 | 428 static __inline__ void fd_cleanup_mutex( void * mutex ) |
| 429 { | |
| 430 CHECK_POSIX_DO( pthread_mutex_unlock((pthread_mutex_t *)mutex), /* */); | |
| 431 } | |
| 432 | |
| 433 static __inline__ void fd_cleanup_rwlock( void * rwlock ) | |
| 434 { | |
| 435 CHECK_POSIX_DO( pthread_rwlock_unlock((pthread_rwlock_t *)rwlock), /* */); | |
| 436 } | |
| 437 | |
| 438 static __inline__ void fd_cleanup_buffer( void * buffer ) | |
| 439 { | |
| 440 free(buffer); | |
| 441 } | |
| 442 | |
| 443 /*============================================================*/ | |
| 444 /* LISTS */ | |
| 445 /*============================================================*/ | |
| 446 | |
| 447 /* The following structure represents a chained list element */ | |
| 448 struct fd_list { | |
| 449 struct fd_list *next; /* next element in the list */ | |
| 450 struct fd_list *prev; /* previous element in the list */ | |
| 451 struct fd_list *head; /* head of the list */ | |
| 452 void *o; /* additional avialbe pointer used for start of the parento object or other purpose */ | |
| 453 }; | |
| 454 | |
| 455 /* Initialize a list element */ | |
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456 #define FD_LIST_INITIALIZER( _list_name ) \ |
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457 { .next = & _list_name, .prev = & _list_name, .head = & _list_name, .o = NULL } |
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458 #define FD_LIST_INITIALIZER_O( _list_name, _obj ) \ |
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459 { .next = & _list_name, .prev = & _list_name, .head = & _list_name, .o = _obj } |
| 0 | 460 void fd_list_init ( struct fd_list * list, void *obj ); |
| 461 | |
| 462 /* Return boolean, true if the list is empty */ | |
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463 #define FD_IS_LIST_EMPTY( _list ) ((((struct fd_list *)(_list))->head == (_list)) && (((struct fd_list *)(_list))->next == (_list))) |
| 0 | 464 |
| 465 /* Insert an item in a list at known position */ | |
| 466 void fd_list_insert_after ( struct fd_list * ref, struct fd_list * item ); | |
| 467 void fd_list_insert_before ( struct fd_list * ref, struct fd_list * item ); | |
| 468 | |
| 469 /* Insert an item in an ordered list -- ordering function provided. If duplicate object found, EEXIST and it is returned in ref_duplicate */ | |
| 470 int fd_list_insert_ordered( struct fd_list * head, struct fd_list * item, int (*cmp_fct)(void *, void *), void ** ref_duplicate); | |
| 471 | |
| 472 /* Unlink an item from a list */ | |
| 473 void fd_list_unlink ( struct fd_list * item ); | |
| 474 | |
| 475 /* Compute a hash value of a string (session id, diameter id, ...) */ | |
| 476 uint32_t fd_hash ( char * string, size_t len ); | |
| 477 | |
| 478 | |
| 479 | |
| 480 /*============================================================*/ | |
| 481 /* DICTIONARY */ | |
| 482 /*============================================================*/ | |
| 483 /* Structure that contains the complete dictionary definitions */ | |
| 484 struct dictionary; | |
| 485 | |
| 486 /* Structure that contains a dictionary object */ | |
| 487 struct dict_object; | |
| 488 | |
| 489 /* Types of object in the dictionary. */ | |
| 490 enum dict_object_type { | |
| 491 DICT_VENDOR = 1, /* Vendor */ | |
| 492 DICT_APPLICATION, /* Diameter Application */ | |
| 493 DICT_TYPE, /* AVP data type */ | |
| 494 DICT_ENUMVAL, /* Named constant (value of an enumerated AVP type) */ | |
| 495 DICT_AVP, /* AVP */ | |
| 496 DICT_COMMAND, /* Diameter Command */ | |
| 497 DICT_RULE /* a Rule for AVP in command or grouped AVP */ | |
| 498 #define DICT_TYPE_MAX DICT_RULE | |
| 499 }; | |
| 500 | |
| 501 /* Initialize a dictionary */ | |
| 502 int fd_dict_init(struct dictionary ** dict); | |
| 503 /* Destroy a dictionary */ | |
| 504 int fd_dict_fini(struct dictionary ** dict); | |
| 505 | |
| 506 /* | |
| 507 * FUNCTION: fd_dict_new | |
| 508 * | |
| 509 * PARAMETERS: | |
| 510 * dict : Pointer to the dictionnary where the object is created | |
| 511 * type : What kind of object must be created | |
| 512 * data : pointer to the data for the object. | |
| 513 * type parameter is used to determine the type of data (see bellow for detail). | |
| 514 * parent : a reference to a parent object, if needed. | |
| 515 * ref : upon successful creation, reference to new object is stored here if !null. | |
| 516 * | |
| 517 * DESCRIPTION: | |
| 518 * Create a new object in the dictionary. | |
| 519 * See following object sections in this header file for more information on data and parent parameters format. | |
| 520 * | |
| 521 * RETURN VALUE: | |
| 522 * 0 : The object is created in the dictionary. | |
| 523 * EINVAL : A parameter is invalid. | |
| 524 * EEXIST : This object is already defined in the dictionary (with conflicting data). | |
| 525 * If "ref" is not NULL, it points to the existing element on return. | |
| 526 * (other standard errors may be returned, too, with their standard meaning. Example: | |
| 527 * ENOMEM : Memory allocation for the new object element failed.) | |
| 528 */ | |
| 529 int fd_dict_new ( struct dictionary * dict, enum dict_object_type type, void * data, struct dict_object * parent, struct dict_object **ref ); | |
| 530 | |
| 531 /* | |
| 532 * FUNCTION: fd_dict_search | |
| 533 * | |
| 534 * PARAMETERS: | |
| 535 * dict : Pointer to the dictionnary where the object is searched | |
| 536 * type : type of object that is being searched | |
| 537 * criteria : how the object must be searched. See object-related sections bellow for more information. | |
| 538 * what : depending on criteria, the data that must be searched. | |
| 539 * result : On successful return, pointer to the object is stored here. | |
| 540 * retval : this value is returned if the object is not found and result is not NULL. | |
| 541 * | |
| 542 * DESCRIPTION: | |
| 543 * Perform a search in the dictionary. | |
| 544 * See the object-specific sections bellow to find how to look for each objects. | |
| 545 * If the "result" parameter is NULL, the function is used to check if an object is in the dictionary. | |
| 546 * Otherwise, a reference to the object is stored in result if found. | |
| 547 * If result is not NULL and the object is not found, retval is returned (should be 0 or ENOENT usually) | |
| 548 * | |
| 549 * RETURN VALUE: | |
| 550 * 0 : The object has been found in the dictionary, or *result is NULL. | |
| 551 * EINVAL : A parameter is invalid. | |
| 552 * ENOENT : No matching object has been found, and result was NULL. | |
| 553 */ | |
| 554 int fd_dict_search ( struct dictionary * dict, enum dict_object_type type, int criteria, void * what, struct dict_object **result, int retval ); | |
| 555 | |
| 556 /* Special case: get the generic error command object */ | |
| 557 int fd_dict_get_error_cmd(struct dictionary * dict, struct dict_object **obj); | |
| 558 | |
| 559 /* | |
| 560 * FUNCTION: fd_dict_getval | |
| 561 * | |
| 562 * PARAMETERS: | |
| 563 * object : Pointer to a dictionary object. | |
| 564 * data : pointer to a structure to hold the data for the object. | |
| 565 * The type is the same as "data" parameter in fd_dict_new function. | |
| 566 * | |
| 567 * DESCRIPTION: | |
| 568 * Retrieve content of a dictionary object. | |
| 569 * See following object sections in this header file for more information on data and parent parameters format. | |
| 570 * | |
| 571 * RETURN VALUE: | |
| 572 * 0 : The content of the object has been retrieved. | |
| 573 * EINVAL : A parameter is invalid. | |
| 574 */ | |
| 575 int fd_dict_getval ( struct dict_object * object, void * val); | |
| 576 int fd_dict_gettype ( struct dict_object * object, enum dict_object_type * type); | |
| 577 int fd_dict_getdict ( struct dict_object * object, struct dictionary ** dict); | |
| 578 | |
| 579 /* Debug functions */ | |
| 580 void fd_dict_dump_object(struct dict_object * obj); | |
| 581 void fd_dict_dump(struct dictionary * dict); | |
| 582 | |
| 583 | |
| 584 /* | |
| 585 *************************************************************************** | |
| 586 * | |
| 587 * Vendor object | |
| 588 * | |
| 589 * These types are used to manage vendors in the dictionary | |
| 590 * | |
| 591 *************************************************************************** | |
| 592 */ | |
| 593 | |
| 594 /* Type to hold a Vendor ID: "SMI Network Management Private Enterprise Codes" (RFC3232) */ | |
| 595 typedef uint32_t vendor_id_t; | |
| 596 | |
| 597 /* Type to hold data associated to a vendor */ | |
| 598 struct dict_vendor_data { | |
| 599 vendor_id_t vendor_id; /* ID of a vendor */ | |
| 600 char *vendor_name; /* The name of this vendor */ | |
| 601 }; | |
| 602 | |
| 603 /* The criteria for searching a vendor object in the dictionary */ | |
| 604 enum { | |
| 605 VENDOR_BY_ID = 10, /* "what" points to a vendor_id_t */ | |
| 606 VENDOR_BY_NAME, /* "what" points to a string */ | |
| 607 VENDOR_OF_APPLICATION /* "what" points to a struct dict_object containing an application (see bellow) */ | |
| 608 }; | |
| 609 | |
| 610 /*** | |
| 611 * API usage : | |
| 612 | |
| 613 Note: the value of "vendor_name" is copied when the object is created, and the string may be disposed afterwards. | |
| 614 On the other side, when value is retrieved with dict_getval, the string is not copied and MUST NOT be freed. It will | |
| 615 be freed automatically along with the object itself with call to dict_fini later. | |
| 616 | |
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617 - fd_dict_new: |
| 0 | 618 The "parent" parameter is not used for vendors. |
| 619 Sample code to create a vendor: | |
| 620 { | |
| 621 int ret; | |
| 622 struct dict_object * myvendor; | |
| 623 struct dict_vendor_data myvendordata = { 23455, "my vendor name" }; -- just an example... | |
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624 ret = fd_dict_new ( dict, DICT_VENDOR, &myvendordata, NULL, &myvendor ); |
| 0 | 625 } |
| 626 | |
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627 - fd_dict_search: |
| 0 | 628 Sample codes to look for a vendor object, by its id or name: |
| 629 { | |
| 630 int ret; | |
| 631 struct dict_object * vendor_found; | |
| 632 vendor_id_t vendorid = 23455; | |
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633 ret = fd_dict_search ( dict, DICT_VENDOR, VENDOR_BY_ID, &vendorid, &vendor_found, ENOENT); |
| 0 | 634 - or - |
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635 ret = fd_dict_search ( dict, DICT_VENDOR, VENDOR_BY_NAME, "my vendor name", &vendor_found, ENOENT); |
| 0 | 636 } |
| 637 | |
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638 - fd_dict_getval: |
| 0 | 639 Sample code to retrieve the data from a vendor object: |
| 640 { | |
| 641 int ret; | |
| 642 struct dict_object * myvendor; | |
| 643 struct dict_vendor_data myvendordata; | |
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644 ret = fd_dict_search ( dict, DICT_VENDOR, VENDOR_BY_NAME, "my vendor name", &myvendor, ENOENT); |
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645 ret = fd_dict_getval ( myvendor, &myvendordata ); |
| 0 | 646 printf("my vendor id: %d\n", myvendordata.vendor_id ); |
| 647 } | |
| 648 | |
| 649 | |
| 650 */ | |
| 651 | |
| 652 /* | |
| 653 *************************************************************************** | |
| 654 * | |
| 655 * Application object | |
| 656 * | |
| 657 * These types are used to manage Diameter applications in the dictionary | |
| 658 * | |
| 659 *************************************************************************** | |
| 660 */ | |
| 661 | |
| 662 /* Type to hold a Diameter application ID: IANA assigned value for this application. */ | |
| 663 typedef uint32_t application_id_t; | |
| 664 | |
| 665 /* Type to hold data associated to an application */ | |
| 666 struct dict_application_data { | |
| 667 application_id_t application_id; /* ID of the application */ | |
| 668 char *application_name; /* The name of this application */ | |
| 669 }; | |
| 670 | |
| 671 /* The criteria for searching an application object in the dictionary */ | |
| 672 enum { | |
| 673 APPLICATION_BY_ID = 20, /* "what" points to a application_id_t */ | |
| 674 APPLICATION_BY_NAME, /* "what" points to a string */ | |
| 675 APPLICATION_OF_TYPE, /* "what" points to a struct dict_object containing a type object (see bellow) */ | |
| 676 APPLICATION_OF_COMMAND /* "what" points to a struct dict_object containing a command (see bellow) */ | |
| 677 }; | |
| 678 | |
| 679 /*** | |
| 680 * API usage : | |
| 681 | |
| 682 The "parent" parameter of dict_new may point to a vendor object to inform of what vendor defines the application. | |
| 683 for standard-track applications, the "parent" parameter should be NULL. | |
| 684 The vendor associated to an application is retrieved with VENDOR_OF_APPLICATION search criteria on vendors. | |
| 685 | |
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686 - fd_dict_new: |
| 0 | 687 Sample code for application creation: |
| 688 { | |
| 689 int ret; | |
| 690 struct dict_object * vendor; | |
| 691 struct dict_object * appl; | |
| 692 struct dict_vendor_data vendor_data = { | |
| 693 23455, | |
| 694 "my vendor name" | |
| 695 }; | |
| 696 struct dict_application_data app_data = { | |
| 697 9789, | |
| 698 "my vendor's application" | |
| 699 }; | |
| 700 | |
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701 ret = fd_dict_new ( dict, DICT_VENDOR, &vendor_data, NULL, &vendor ); |
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702 ret = fd_dict_new ( dict, DICT_APPLICATION, &app_data, vendor, &appl ); |
| 0 | 703 } |
| 704 | |
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705 - fd_dict_search: |
| 0 | 706 Sample code to retrieve the vendor of an application |
| 707 { | |
| 708 int ret; | |
| 709 struct dict_object * vendor, * appli; | |
| 710 | |
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711 ret = fd_dict_search ( dict, DICT_APPLICATION, APPLICATION_BY_NAME, "my vendor's application", &appli, ENOENT); |
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712 ret = fd_dict_search ( dict, DICT_VENDOR, VENDOR_OF_APPLICATION, appli, &vendor, ENOENT); |
| 0 | 713 } |
| 714 | |
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715 - fd_dict_getval: |
| 0 | 716 Sample code to retrieve the data from an application object: |
| 717 { | |
| 718 int ret; | |
| 719 struct dict_object * appli; | |
| 720 struct dict_application_data appl_data; | |
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721 ret = fd_dict_search ( dict, DICT_APPLICATION, APPLICATION_BY_NAME, "my vendor's application", &appli, ENOENT); |
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722 ret = fd_dict_getval ( appli, &appl_data ); |
| 0 | 723 printf("my application id: %s\n", appl_data.application_id ); |
| 724 } | |
| 725 | |
| 726 */ | |
| 727 | |
| 728 /* | |
| 729 *************************************************************************** | |
| 730 * | |
| 731 * Type object | |
| 732 * | |
| 733 * These types are used to manage AVP data types in the dictionary | |
| 734 * | |
| 735 *************************************************************************** | |
| 736 */ | |
| 737 | |
| 738 /* Type to store any AVP value */ | |
| 739 union avp_value { | |
| 740 struct { | |
| 741 uint8_t *data; /* bytes buffer */ | |
| 742 size_t len; /* length of the data buffer */ | |
| 743 } os; /* Storage for an octet string, data is alloc'd and must be freed */ | |
| 744 int32_t i32; /* integer 32 */ | |
| 745 int64_t i64; /* integer 64 */ | |
| 746 uint32_t u32; /* unsigned 32 */ | |
| 747 uint64_t u64; /* unsigned 64 */ | |
| 748 float f32; /* float 32 */ | |
| 749 double f64; /* float 64 */ | |
| 750 }; | |
| 751 | |
| 752 /* These are the basic AVP types defined in RFC3588bis */ | |
| 753 enum dict_avp_basetype { | |
| 754 AVP_TYPE_GROUPED, | |
| 755 AVP_TYPE_OCTETSTRING, | |
| 756 AVP_TYPE_INTEGER32, | |
| 757 AVP_TYPE_INTEGER64, | |
| 758 AVP_TYPE_UNSIGNED32, | |
| 759 AVP_TYPE_UNSIGNED64, | |
| 760 AVP_TYPE_FLOAT32, | |
| 761 AVP_TYPE_FLOAT64 | |
| 762 #define AVP_TYPE_MAX AVP_TYPE_FLOAT64 | |
| 763 }; | |
| 764 | |
| 765 /* Callbacks that can be associated with a derived type to easily interpret the AVP value. */ | |
| 766 /* | |
| 767 * CALLBACK: dict_avpdata_interpret | |
| 768 * | |
| 769 * PARAMETERS: | |
| 770 * val : Pointer to the AVP value that must be interpreted. | |
| 771 * interpreted : The result of interpretation is stored here. The format and meaning depends on each type. | |
| 772 * | |
| 773 * DESCRIPTION: | |
| 774 * This callback can be provided with a derived type in order to facilitate the interpretation of formated data. | |
| 775 * For example, when an AVP of type "Address" is received, it can be used to convert the octetstring into a struct sockaddr. | |
| 776 * This callback is not called directly, but through the message's API msg_avp_value_interpret function. | |
| 777 * | |
| 778 * RETURN VALUE: | |
| 779 * 0 : Operation complete. | |
| 780 * !0 : An error occurred, the error code is returned. | |
| 781 */ | |
| 782 typedef int (*dict_avpdata_interpret) (union avp_value * value, void * interpreted); | |
| 783 /* | |
| 784 * CALLBACK: dict_avpdata_encode | |
| 785 * | |
| 786 * PARAMETERS: | |
| 787 * data : The formated data that must be stored in the AVP value. | |
| 788 * val : Pointer to the AVP value storage area where the data must be stored. | |
| 789 * | |
| 790 * DESCRIPTION: | |
| 791 * This callback can be provided with a derived type in order to facilitate the encoding of formated data. | |
| 792 * For example, it can be used to convert a struct sockaddr in an AVP value of type Address. | |
| 793 * This callback is not called directly, but through the message's API msg_avp_value_encode function. | |
| 794 * If the callback is defined for an OctetString based type, the created string must be malloc'd. free will be called | |
| 795 * automatically later. | |
| 796 * | |
| 797 * RETURN VALUE: | |
| 798 * 0 : Operation complete. | |
| 799 * !0 : An error occurred, the error code is returned. | |
| 800 */ | |
| 801 typedef int (*dict_avpdata_encode) (void * data, union avp_value * val); | |
| 802 | |
| 803 | |
| 804 /* Type to hold data associated to a derived AVP data type */ | |
| 805 struct dict_type_data { | |
| 806 enum dict_avp_basetype type_base; /* How the data of such AVP must be interpreted */ | |
| 807 char *type_name; /* The name of this type */ | |
| 808 dict_avpdata_interpret type_interpret;/* cb to convert the AVP value in more comprehensive format (or NULL) */ | |
| 809 dict_avpdata_encode type_encode; /* cb to convert formatted data into an AVP value (or NULL) */ | |
| 810 }; | |
| 811 | |
| 812 /* The criteria for searching a type object in the dictionary */ | |
| 813 enum { | |
| 814 TYPE_BY_NAME = 30, /* "what" points to a string */ | |
| 815 TYPE_OF_ENUMVAL, /* "what" points to a struct dict_object containing an enumerated constant (DICT_ENUMVAL, see bellow). */ | |
| 816 TYPE_OF_AVP /* "what" points to a struct dict_object containing an AVP object. */ | |
| 817 }; | |
| 818 | |
| 819 | |
| 820 /*** | |
| 821 * API usage : | |
| 822 | |
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823 - fd_dict_new: |
| 0 | 824 The "parent" parameter may point to an application object, when a type is defined by a Diameter application. |
| 825 | |
| 826 Sample code: | |
| 827 { | |
| 828 int ret; | |
| 829 struct dict_object * mytype; | |
| 830 struct dict_type_data mytypedata = | |
| 831 { | |
| 832 AVP_TYPE_OCTETSTRING, | |
| 833 "Address", | |
| 834 NULL, | |
| 835 NULL | |
| 836 }; | |
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837 ret = fd_dict_new ( dict, DICT_TYPE, &mytypedata, NULL, &mytype ); |
| 0 | 838 } |
| 839 | |
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840 - fd_dict_search: |
| 0 | 841 Sample code: |
| 842 { | |
| 843 int ret; | |
| 844 struct dict_object * address_type; | |
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845 ret = fd_dict_search ( dict, DICT_TYPE, TYPE_BY_NAME, "Address", &address_type, ENOENT); |
| 0 | 846 } |
| 847 | |
| 848 */ | |
| 849 | |
| 850 /* | |
| 851 *************************************************************************** | |
| 852 * | |
| 853 * Enumerated values object | |
| 854 * | |
| 855 * These types are used to manage named constants of some AVP, | |
| 856 * for enumerated types. Waaad allows contants for types others than Unsigned32 | |
| 857 * | |
| 858 *************************************************************************** | |
| 859 */ | |
| 860 | |
| 861 /* Type to hold data of named constants for AVP */ | |
| 862 struct dict_enumval_data { | |
| 863 char *enum_name; /* The name of this constant */ | |
| 864 union avp_value enum_value; /* Value of the constant. Union term depends on parent type's base type. */ | |
| 865 }; | |
| 866 | |
| 867 /* The criteria for searching a constant in the dictionary */ | |
| 868 enum { | |
| 869 ENUMVAL_BY_STRUCT = 40, /* "what" points to a struct dict_enumval_request as defined bellow */ | |
| 870 }; | |
| 871 | |
| 872 struct dict_enumval_request { | |
| 873 /* Identifier of the parent type, one of the following must not be NULL */ | |
| 874 struct dict_object *type_obj; | |
| 875 char *type_name; | |
| 876 | |
| 877 /* Search criteria for the constant */ | |
| 878 struct dict_enumval_data search; /* search.enum_value is used only if search.enum_name == NULL */ | |
| 879 }; | |
| 880 | |
| 881 /*** | |
| 882 * API usage : | |
| 883 | |
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884 - fd_dict_new: |
| 0 | 885 The "parent" parameter must point to a derived type object. |
| 886 Sample code to create a type "Boolean" with two constants "True" and "False": | |
| 887 { | |
| 888 int ret; | |
| 889 struct dict_object * type_boolean; | |
| 890 struct dict_type_data type_boolean_data = | |
| 891 { | |
| 892 AVP_TYPE_INTEGER32, | |
| 893 "Boolean", | |
| 894 NULL, | |
| 895 NULL | |
| 896 }; | |
| 897 struct dict_enumval_data boolean_false = | |
| 898 { | |
| 899 .enum_name="False", | |
| 900 .enum_value.i32 = 0 | |
| 901 }; | |
| 902 struct dict_enumval_data boolean_true = | |
| 903 { | |
| 904 .enum_name="True", | |
| 905 .enum_value.i32 = -1 | |
| 906 }; | |
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907 ret = fd_dict_new ( dict, DICT_TYPE, &type_boolean_data, NULL, &type_boolean ); |
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908 ret = fd_dict_new ( dict, DICT_ENUMVAL, &boolean_false, type_boolean, NULL ); |
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909 ret = fd_dict_new ( dict, DICT_ENUMVAL, &boolean_true , type_boolean, NULL ); |
| 0 | 910 |
| 911 } | |
| 912 | |
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913 - fd_dict_search: |
| 0 | 914 Sample code to look for a constant name, by its value: |
| 915 { | |
| 916 int ret; | |
| 917 struct dict_object * value_found; | |
| 918 struct dict_enumval_request boolean_by_value = | |
| 919 { | |
| 920 .type_name = "Boolean", | |
| 921 .search.enum_name=NULL, | |
| 922 .search.enum_value.i32 = -1 | |
| 923 }; | |
| 924 | |
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925 ret = fd_dict_search ( dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &boolean_by_value, &value_found, ENOENT); |
| 0 | 926 } |
| 927 | |
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928 - fd_dict_getval: |
| 0 | 929 Sample code to retrieve the data from a constant object: |
| 930 { | |
| 931 int ret; | |
| 932 struct dict_object * value_found; | |
| 933 struct dict_enumval_data boolean_data = NULL; | |
| 934 struct dict_enumval_request boolean_by_value = | |
| 935 { | |
| 936 .type_name = "Boolean", | |
| 937 .search.enum_name=NULL, | |
| 938 .search.enum_value.i32 = 0 | |
| 939 }; | |
| 940 | |
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941 ret = fd_dict_search ( dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &boolean_by_value, &value_found, ENOENT); |
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942 ret = fd_dict_getval ( value_found, &boolean_data ); |
| 0 | 943 printf(" Boolean with value 0: %s", boolean_data.enum_name ); |
| 944 } | |
| 945 */ | |
| 946 | |
| 947 /* | |
| 948 *************************************************************************** | |
| 949 * | |
| 950 * AVP object | |
| 951 * | |
| 952 * These objects are used to manage AVP definitions in the dictionary | |
| 953 * | |
| 954 *************************************************************************** | |
| 955 */ | |
| 956 | |
| 957 /* Type to hold an AVP code. For vendor 0, these codes are assigned by IANA. Otherwise, it is managed by the vendor */ | |
| 958 typedef uint32_t avp_code_t; | |
| 959 | |
| 960 /* Values of AVP flags */ | |
| 961 #define AVP_FLAG_VENDOR 0x80 | |
| 962 #define AVP_FLAG_MANDATORY 0x40 | |
| 963 #define AVP_FLAG_RESERVED3 0x20 | |
| 964 #define AVP_FLAG_RESERVED4 0x10 | |
| 965 #define AVP_FLAG_RESERVED5 0x08 | |
| 966 #define AVP_FLAG_RESERVED6 0x04 | |
| 967 #define AVP_FLAG_RESERVED7 0x02 | |
| 968 #define AVP_FLAG_RESERVED8 0x01 | |
| 969 | |
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970 /* For dumping flags and values */ |
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971 #define DUMP_AVPFL_str "%c%c" |
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972 #define DUMP_AVPFL_val(_val) (_val & AVP_FLAG_VENDOR)?'V':'-' , (_val & AVP_FLAG_MANDATORY)?'M':'-' |
| 0 | 973 |
| 974 /* Type to hold data associated to an avp */ | |
| 975 struct dict_avp_data { | |
| 976 avp_code_t avp_code; /* Code of the avp */ | |
| 977 vendor_id_t avp_vendor; /* Vendor of the AVP, or 0 */ | |
| 978 char *avp_name; /* Name of this AVP */ | |
| 979 uint8_t avp_flag_mask; /* Mask of fixed AVP flags */ | |
| 980 uint8_t avp_flag_val; /* Values of the fixed flags */ | |
| 981 enum dict_avp_basetype avp_basetype; /* Basic type of data found in the AVP */ | |
| 982 }; | |
| 983 | |
| 984 /* The criteria for searching an avp object in the dictionary */ | |
| 985 enum { | |
| 986 AVP_BY_CODE = 50, /* "what" points to an avp_code_t, vendor is always 0 */ | |
| 987 AVP_BY_NAME, /* "what" points to a string, vendor is always 0 */ | |
| 988 AVP_BY_CODE_AND_VENDOR, /* "what" points to a struct dict_avp_request (see bellow), where avp_vendor and avp_code are set */ | |
| 989 AVP_BY_NAME_AND_VENDOR /* "what" points to a struct dict_avp_request (see bellow), where avp_vendor and avp_name are set */ | |
| 990 }; | |
| 991 | |
| 992 /* Struct used for some researchs */ | |
| 993 struct dict_avp_request { | |
| 994 vendor_id_t avp_vendor; | |
| 995 avp_code_t avp_code; | |
| 996 char *avp_name; | |
| 997 }; | |
| 998 | |
| 999 | |
| 1000 /*** | |
| 1001 * API usage : | |
| 1002 | |
| 1003 If "parent" parameter is not NULL during AVP creation, it must point to a DICT_TYPE object. | |
| 1004 The extended type is then attached to the AVP. In case where it is an enumerated type, the value of | |
| 1005 AVP is automatically interpreted in debug messages, and in message checks. | |
| 1006 The derived type of an AVP can be retrieved with: dict_search ( DICT_TYPE, TYPE_OF_AVP, avp, ... ) | |
| 1007 | |
| 1008 To create the rules (ABNF) for children of Grouped AVP, see the DICT_RULE related part. | |
| 1009 | |
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1010 - fd_dict_new: |
| 0 | 1011 Sample code for AVP creation: |
| 1012 { | |
| 1013 int ret; | |
| 1014 struct dict_object * user_name_avp; | |
| 1015 struct dict_object * boolean_type; | |
| 1016 struct dict_object * sample_boolean_avp; | |
| 1017 struct dict_avp_data user_name_data = { | |
| 1018 1, // code | |
| 1019 0, // vendor | |
| 1020 "User-Name", // name | |
| 1021 AVP_FLAG_VENDOR | AVP_FLAG_MANDATORY, // fixed mask: V and M values must always be defined as follow. other flags can be set or cleared | |
| 1022 AVP_FLAG_MANDATORY, // the V flag must be cleared, the M flag must be set. | |
| 1023 AVP_TYPE_OCTETSTRING // User-Name AVP contains OctetString data (further precision such as UTF8String can be given with a parent derived type) | |
| 1024 }; | |
| 1025 struct dict_avp_data sample_boolean_data = { | |
| 1026 31337, | |
| 1027 23455, | |
| 1028 "Sample-Boolean", | |
| 1029 AVP_FLAG_VENDOR | AVP_FLAG_MANDATORY, | |
| 1030 AVP_FLAG_VENDOR, | |
| 1031 AVP_TYPE_INTEGER32 // This MUST be the same as parent type's | |
| 1032 }; | |
| 1033 | |
| 1034 -- Create an AVP with a base type -- | |
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1035 ret = fd_dict_new ( dict, DICT_AVP, &user_name_data, NULL, &user_name_avp ); |
| 0 | 1036 |
| 1037 -- Create an AVP with a derived type -- | |
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1038 ret = fd_dict_search ( dict, DICT_TYPE, TYPE_BY_NAME, "Boolean", &boolean_type, ENOENT); |
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1039 ret = fd_dict_new ( dict, DICT_AVP, &sample_boolean_data , boolean_type, &sample_boolean_avp ); |
| 0 | 1040 |
| 1041 } | |
| 1042 | |
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1043 - fd_dict_search: |
| 0 | 1044 Sample code to look for an AVP |
| 1045 { | |
| 1046 int ret; | |
| 1047 struct dict_object * avp_username; | |
| 1048 struct dict_object * avp_sampleboolean; | |
| 1049 struct dict_avp_request avpvendorboolean = | |
| 1050 { | |
| 1051 .avp_vendor = 23455, | |
| 1052 .avp_name = "Sample-Boolean" | |
| 1053 }; | |
| 1054 | |
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1055 ret = fd_dict_search ( dict, DICT_AVP, AVP_BY_NAME, "User-Name", &avp_username, ENOENT); |
| 0 | 1056 |
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1057 ret = fd_dict_search ( dict, DICT_AVP, AVP_BY_NAME_AND_VENDOR, &avpvendorboolean, &avp_sampleboolean, ENOENT); |
| 0 | 1058 |
| 1059 } | |
| 1060 | |
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1061 - fd_dict_getval: |
| 0 | 1062 Sample code to retrieve the data from an AVP object: |
| 1063 { | |
| 1064 int ret; | |
| 1065 struct dict_object * avp_username; | |
| 1066 struct dict_avp_data user_name_data; | |
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1067 ret = fd_dict_search ( dict, DICT_AVP, AVP_BY_NAME, "User-Name", &avp_username, ENOENT); |
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1068 ret = fd_dict_getval ( avp_username, &user_name_data ); |
| 0 | 1069 printf("User-Name code: %d\n", user_name_data.avp_code ); |
| 1070 } | |
| 1071 | |
| 1072 */ | |
| 1073 | |
| 1074 /* | |
| 1075 *************************************************************************** | |
| 1076 * | |
| 1077 * Command object | |
| 1078 * | |
| 1079 * These types are used to manage commands objects in the dictionary | |
| 1080 * | |
| 1081 *************************************************************************** | |
| 1082 */ | |
| 1083 | |
| 1084 /* Type to hold a Diameter command code: IANA assigned values. 0x0-0x7fffff=standard, 0x800000-0xfffffd=vendors, 0xfffffe-0xffffff=experimental */ | |
| 1085 typedef uint32_t command_code_t; | |
| 1086 | |
| 1087 /* Values of command flags */ | |
| 1088 #define CMD_FLAG_REQUEST 0x80 | |
| 1089 #define CMD_FLAG_PROXIABLE 0x40 | |
| 1090 #define CMD_FLAG_ERROR 0x20 | |
| 1091 #define CMD_FLAG_RETRANSMIT 0x10 | |
| 1092 #define CMD_FLAG_RESERVED5 0x08 | |
| 1093 #define CMD_FLAG_RESERVED6 0x04 | |
| 1094 #define CMD_FLAG_RESERVED7 0x02 | |
| 1095 #define CMD_FLAG_RESERVED8 0x01 | |
| 1096 | |
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1097 /* For dumping flags and values */ |
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1098 #define DUMP_CMDFL_str "%c%c%c%c" |
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1099 #define DUMP_CMDFL_val(_val) (_val & CMD_FLAG_REQUEST)?'R':'-' , (_val & CMD_FLAG_PROXIABLE)?'P':'-' , (_val & CMD_FLAG_ERROR)?'E':'-' , (_val & CMD_FLAG_RETRANSMIT)?'T':'-' |
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1100 |
| 0 | 1101 /* Type to hold data associated to a command */ |
| 1102 struct dict_cmd_data { | |
| 1103 command_code_t cmd_code; /* code of the command */ | |
| 1104 char *cmd_name; /* Name of the command */ | |
| 1105 uint8_t cmd_flag_mask; /* Mask of fixed-value flags */ | |
| 1106 uint8_t cmd_flag_val; /* values of the fixed flags */ | |
| 1107 }; | |
| 1108 | |
| 1109 /* The criteria for searching an avp object in the dictionary */ | |
| 1110 enum { | |
| 1111 CMD_BY_NAME = 60, /* "what" points to a string */ | |
| 1112 CMD_BY_CODE_R, /* "what" points to a command_code_t. The "Request" command is returned. */ | |
| 1113 CMD_BY_CODE_A, /* "what" points to a command_code_t. The "Answer" command is returned. */ | |
| 1114 CMD_ANSWER /* "what" points to a struct dict_object of a request command. The corresponding "Answer" command is returned. */ | |
| 1115 }; | |
| 1116 | |
| 1117 | |
| 1118 /*** | |
| 1119 * API usage : | |
| 1120 | |
| 1121 The "parent" parameter of dict_new may point to an application object to inform of what application defines the command. | |
| 1122 The application associated to a command is retrieved with APPLICATION_OF_COMMAND search criteria on applications. | |
| 1123 | |
| 1124 To create the rules for children of commands, see the DICT_RULE related part. | |
| 1125 | |
| 1126 Note that the "Request" and "Answer" commands are two independant objects. This allows to have different rules for each. | |
| 1127 | |
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1128 - fd_dict_new: |
| 0 | 1129 Sample code for command creation: |
| 1130 { | |
| 1131 int ret; | |
| 1132 struct dict_object * cer; | |
| 1133 struct dict_object * cea; | |
| 1134 struct dict_cmd_data ce_data = { | |
| 1135 257, // code | |
| 1136 "Capabilities-Exchange-Request", // name | |
| 1137 CMD_FLAG_REQUEST, // mask | |
| 1138 CMD_FLAG_REQUEST // value. Only the "R" flag is constrained here, set. | |
| 1139 }; | |
| 1140 | |
|
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1141 ret = fd_dict_new (dict, DICT_COMMAND, &ce_data, NULL, &cer ); |
| 0 | 1142 |
| 1143 ce_data.cmd_name = "Capabilities-Exchange-Answer"; | |
| 1144 ce_data.cmd_flag_val = 0; // Same constraint on "R" flag, but this time it must be cleared. | |
| 1145 | |
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1146 ret = fd_dict_new ( dict, DICT_COMMAND, &ce_data, NULL, &cea ); |
| 0 | 1147 } |
| 1148 | |
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1149 - fd_dict_search: |
| 0 | 1150 Sample code to look for a command |
| 1151 { | |
| 1152 int ret; | |
| 1153 struct dict_object * cer, * cea; | |
| 1154 command_code_t code = 257; | |
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1155 ret = fd_dict_search ( dict, DICT_COMMAND, CMD_BY_NAME, "Capabilities-Exchange-Request", &cer, ENOENT); |
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1156 ret = fd_dict_search ( dict, DICT_COMMAND, CMD_BY_CODE_R, &code, &cer, ENOENT); |
| 0 | 1157 } |
| 1158 | |
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1159 - fd_dict_getval: |
| 0 | 1160 Sample code to retrieve the data from a command object: |
| 1161 { | |
| 1162 int ret; | |
| 1163 struct dict_object * cer; | |
| 1164 struct dict_object * cea; | |
| 1165 struct dict_cmd_data cea_data; | |
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1166 ret = fd_dict_search ( dict, DICT_COMMAND, CMD_BY_NAME, "Capabilities-Exchange-Request", &cer, ENOENT); |
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1167 ret = fd_dict_search ( dict, DICT_COMMAND, CMD_ANSWER, cer, &cea, ENOENT); |
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1168 ret = fd_dict_getval ( cea, &cea_data ); |
| 0 | 1169 printf("Answer to CER: %s\n", cea_data.cmd_name ); |
| 1170 } | |
| 1171 | |
| 1172 */ | |
| 1173 | |
| 1174 /* | |
| 1175 *************************************************************************** | |
| 1176 * | |
| 1177 * Rule object | |
| 1178 * | |
| 1179 * These objects are used to manage rules in the dictionary (ABNF implementation) | |
| 1180 * This is used for checking messages validity (more powerful than a DTD) | |
| 1181 * | |
| 1182 *************************************************************************** | |
| 1183 */ | |
| 1184 | |
| 1185 /* This defines the kind of rule that is defined */ | |
| 1186 enum rule_position { | |
| 1187 RULE_FIXED_HEAD = 1, /* The AVP must be at the head of the group. The rule_order field is used to specify the position. */ | |
| 1188 RULE_REQUIRED, /* The AVP must be present in the parent, but its position is not defined. */ | |
| 1189 RULE_OPTIONAL, /* The AVP may be present in the message. Used to specify a max number of occurences for example */ | |
| 1190 RULE_FIXED_TAIL /* The AVP must be at the end of the group. The rule_order field is used to specify the position. */ | |
| 1191 }; | |
| 1192 | |
| 1193 /* Content of a RULE object data */ | |
| 1194 struct dict_rule_data { | |
| 1195 struct dict_object *rule_avp; /* Pointer to the AVP object that is concerned by this rule */ | |
| 1196 enum rule_position rule_position; /* The position in which the rule_avp must appear in the parent */ | |
| 1197 unsigned rule_order; /* for RULE_FIXED_* rules, the place. 1,2,3.. for HEAD rules; ...,3,2,1 for TAIL rules. */ | |
| 1198 int rule_min; /* Minimum number of occurences. -1 means "default": 0 for optional rules, 1 for other rules */ | |
| 1199 int rule_max; /* Maximum number of occurences. -1 means no maximum. 0 means the AVP is forbidden. */ | |
| 1200 }; | |
| 1201 | |
| 1202 /* The criteria for searching a rule in the dictionary */ | |
| 1203 enum { | |
| 1204 RULE_BY_AVP_AND_PARENT = 70 /* "what" points to a struct dict_rule_request -- see bellow. This is used to query "what is the rule for this AVP in this group?" */ | |
| 1205 }; | |
| 1206 | |
| 1207 /* Structure for querying the dictionary about a rule */ | |
| 1208 struct dict_rule_request { | |
| 1209 struct dict_object *rule_parent; /* The grouped avp or command to which the rule apply */ | |
| 1210 struct dict_object *rule_avp; /* The AVP concerned by this rule */ | |
| 1211 }; | |
| 1212 | |
| 1213 | |
| 1214 /*** | |
| 1215 * API usage : | |
| 1216 | |
| 1217 The "parent" parameter can not be NULL. It points to the object (grouped avp or command) to which this rule apply (i.e. for which the ABNF is defined). | |
| 1218 | |
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1219 - fd_dict_new: |
| 0 | 1220 Sample code for rule creation. Let's create the Proxy-Info grouped AVP for example. |
| 1221 { | |
| 1222 int ret; | |
| 1223 struct dict_object * proxy_info_avp; | |
| 1224 struct dict_object * proxy_host_avp; | |
| 1225 struct dict_object * proxy_state_avp; | |
| 1226 struct dict_object * diameteridentity_type; | |
| 1227 struct dict_rule_data rule_data; | |
| 1228 struct dict_type_data di_type_data = { AVP_TYPE_OCTETSTRING, "DiameterIdentity", NULL, NULL }; | |
| 1229 struct dict_avp_data proxy_info_data = { 284, 0, "Proxy-Info", AVP_FLAG_VENDOR | AVP_FLAG_MANDATORY, AVP_FLAG_MANDATORY, AVP_TYPE_GROUPED }; | |
| 1230 struct dict_avp_data proxy_host_data = { 280, 0, "Proxy-Host", AVP_FLAG_VENDOR | AVP_FLAG_MANDATORY, AVP_FLAG_MANDATORY, AVP_TYPE_OCTETSTRING }; | |
| 1231 struct dict_avp_data proxy_state_data = { 33, 0, "Proxy-State",AVP_FLAG_VENDOR | AVP_FLAG_MANDATORY, AVP_FLAG_MANDATORY, AVP_TYPE_OCTETSTRING }; | |
| 1232 | |
| 1233 -- Create the parent AVP | |
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1234 ret = fd_dict_new ( dict, DICT_AVP, &proxy_info_data, NULL, &proxy_info_avp ); |
| 0 | 1235 |
| 1236 -- Create the first child AVP. | |
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1237 ret = fd_dict_new ( dict, DICT_TYPE, &di_type_data, NULL, &diameteridentity_type ); |
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1238 ret = fd_dict_new ( dict, DICT_AVP, &proxy_host_data, diameteridentity_type, &proxy_host_avp ); |
| 0 | 1239 |
| 1240 -- Create the other child AVP | |
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1241 ret = fd_dict_new ( dict, DICT_AVP, &proxy_state_data, NULL, &proxy_state_avp ); |
| 0 | 1242 |
| 1243 -- Now we can create the rules. Both children AVP are mandatory. | |
| 1244 rule_data.rule_position = RULE_REQUIRED; | |
| 1245 rule_data.rule_min = -1; | |
| 1246 rule_data.rule_max = -1; | |
| 1247 | |
| 1248 rule_data.rule_avp = proxy_host_avp; | |
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1249 ret = fd_dict_new ( dict, DICT_RULE, &rule_data, proxy_info_avp, NULL ); |
| 0 | 1250 |
| 1251 rule_data.rule_avp = proxy_state_avp; | |
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1252 ret = fd_dict_new ( dict, DICT_RULE, &rule_data, proxy_info_avp, NULL ); |
| 0 | 1253 } |
| 1254 | |
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1255 - fd_dict_search and fd_dict_getval are similar to previous examples. |
| 0 | 1256 |
| 1257 */ | |
| 1258 | |
| 1259 /* Define some hard-coded values */ | |
| 1260 /* Commands Codes */ | |
| 1261 #define CC_CAPABILITIES_EXCHANGE 257 | |
| 1262 #define CC_RE_AUTH 258 | |
| 1263 #define CC_ACCOUNTING 271 | |
| 1264 #define CC_ABORT_SESSION 274 | |
| 1265 #define CC_SESSION_TERMINATION 275 | |
| 1266 #define CC_DEVICE_WATCHDOG 280 | |
| 1267 #define CC_DISCONNECT_PEER 282 | |
| 1268 | |
| 1269 /* AVPs (Vendor 0) */ | |
| 1270 #define AC_PROXY_STATE 33 | |
| 1271 #define AC_HOST_IP_ADDRESS 257 | |
| 1272 #define AC_AUTH_APPLICATION_ID 258 | |
| 1273 #define AC_ACCT_APPLICATION_ID 259 | |
| 1274 #define AC_VENDOR_SPECIFIC_APPLICATION_ID 260 | |
| 1275 #define AC_REDIRECT_HOST_USAGE 261 | |
| 1276 #define AC_REDIRECT_MAX_CACHE_TIME 262 | |
| 1277 #define AC_SESSION_ID 263 | |
| 1278 #define AC_ORIGIN_HOST 264 | |
| 1279 #define AC_SUPPORTED_VENDOR_ID 265 | |
| 1280 #define AC_VENDOR_ID 266 | |
| 1281 #define AC_FIRMWARE_REVISION 267 | |
| 1282 #define AC_RESULT_CODE 268 | |
| 1283 #define AC_PRODUCT_NAME 269 | |
| 1284 #define AC_DISCONNECT_CAUSE 273 | |
| 1285 #define ACV_DC_REBOOTING 0 | |
| 1286 #define ACV_DC_BUSY 1 | |
| 1287 #define ACV_DC_NOT_FRIEND 2 | |
| 1288 #define AC_ORIGIN_STATE_ID 278 | |
| 1289 #define AC_FAILED_AVP 279 | |
| 1290 #define AC_PROXY_HOST 280 | |
| 1291 #define AC_ERROR_MESSAGE 281 | |
| 1292 #define AC_ROUTE_RECORD 282 | |
| 1293 #define AC_DESTINATION_REALM 283 | |
| 1294 #define AC_PROXY_INFO 284 | |
| 1295 #define AC_REDIRECT_HOST 292 | |
| 1296 #define AC_DESTINATION_HOST 293 | |
| 1297 #define AC_ERROR_REPORTING_HOST 294 | |
| 1298 #define AC_ORIGIN_REALM 296 | |
| 1299 #define AC_INBAND_SECURITY_ID 299 | |
| 1300 | |
| 1301 /* Error codes */ | |
| 1302 #define ER_DIAMETER_SUCCESS 2001 | |
| 1303 #define ER_DIAMETER_REALM_NOT_SERVED 3003 | |
| 1304 #define ER_DIAMETER_TOO_BUSY 3004 | |
| 1305 #define ER_DIAMETER_REDIRECT_INDICATION 3006 | |
| 1306 | |
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1307 |
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1308 /*============================================================*/ |
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1309 /* SESSIONS */ |
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1310 /*============================================================*/ |
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1311 |
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1312 /* Modules that want to associate a state with a Session-Id must first register a handler of this type */ |
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1313 struct session_handler; |
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1314 |
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1315 /* This opaque structure represents a session associated with a Session-Id */ |
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1316 struct session; |
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1317 |
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1318 /* The state information that a module associate with a session -- each module define its own data format */ |
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1319 typedef void session_state; |
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1320 |
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1321 /* |
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1322 * FUNCTION: fd_sess_handler_create |
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1323 * |
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1324 * PARAMETERS: |
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1325 * handler : location where the new handler must be stored. |
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1326 * cleanup : a callback function that must be called when the session with associated data is destroyed. |
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1327 * |
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1328 * DESCRIPTION: |
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1329 * Create a new session handler. This is needed by a module to associate a state with a session object. |
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1330 * The cleanup handler is called when the session timeout expires, or fd_sess_destroy is called. It must free |
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1331 * the state associated with the session, and eventually trig other actions (send a STR, ...). |
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1332 * |
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1333 * RETURN VALUE: |
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1334 * 0 : The new handler has been created. |
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1335 * EINVAL : A parameter is invalid. |
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1336 * ENOMEM : Not enough memory to complete the operation |
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1337 */ |
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1338 int fd_sess_handler_create_internal ( struct session_handler ** handler, void (*cleanup)(char * sid, session_state * state) ); |
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1339 /* Macro to avoid casting everywhere */ |
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1340 #define fd_sess_handler_create( _handler, _cleanup ) \ |
|
6
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1341 fd_sess_handler_create_internal( (_handler), (void (*)(char *, session_state *))(_cleanup) ) |
|
3
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1342 |
|
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|
1343 /* |
|
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1344 * FUNCTION: fd_sess_handler_destroy |
|
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|
1345 * |
|
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1346 * PARAMETERS: |
|
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1347 * handler : location of an handler created by fd_sess_handler_create. |
|
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1348 * |
|
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|
1349 * DESCRIPTION: |
|
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1350 * This destroys a session handler (typically called when an application is shutting down). |
|
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1351 * If sessions states are registered with this handler, the cleanup callback is called on them. |
|
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1352 * |
|
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1353 * RETURN VALUE: |
|
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1354 * 0 : The handler was destroyed. |
|
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1355 * EINVAL : A parameter is invalid. |
|
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1356 * ENOMEM : Not enough memory to complete the operation |
|
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|
1357 */ |
|
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1358 int fd_sess_handler_destroy ( struct session_handler ** handler ); |
|
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1359 |
|
2
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|
1360 |
|
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|
1361 |
|
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|
1362 /* |
|
3
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1363 * FUNCTION: fd_sess_new |
|
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1364 * |
|
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1365 * PARAMETERS: |
|
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1366 * session : The location where the session object will be created upon success. |
|
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1367 * diamId : \0-terminated string containing a Diameter Identity. |
|
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1368 * opt : Additional string. Usage is described bellow. |
|
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1369 * optlen : if opt is \0-terminated, this can be 0. Otherwise, the length of opt. |
|
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1370 * |
|
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|
1371 * DESCRIPTION: |
|
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1372 * Create a new session object. The Session-Id string associated with this session is generated as follow: |
|
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1373 * If diamId parameter is provided, the string is created according to the RFC: <diamId>;<high32>;<low32>[;opt] where |
|
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1374 * diamId is a Diameter Identity. |
|
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1375 * high32 and low32 are the parts of a monotonic 64 bits counter initialized to (time, 0) at startup. |
|
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1376 * opt is an optional string that can be concatenated to the identifier. |
|
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1377 * If diamId is NULL, the string is exactly the content of opt. |
|
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1378 * |
|
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1379 * RETURN VALUE: |
|
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1380 * 0 : The session is created. |
|
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1381 * EINVAL : A parameter is invalid. |
|
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1382 * EALREADY : A session with the same name already exists (returned in *session) |
|
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1383 * ENOMEM : Not enough memory to complete the operation |
|
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|
1384 */ |
|
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1385 int fd_sess_new ( struct session ** session, char * diamId, char * opt, size_t optlen ); |
|
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|
1386 |
|
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|
1387 /* |
|
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1388 * FUNCTION: fd_sess_fromsid |
|
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1389 * |
|
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1390 * PARAMETERS: |
|
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1391 * sid : pointer to a string containing a Session-Id (UTF-8). |
|
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1392 * len : length of the sid string (which does not need to be '\0'-terminated) |
|
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1393 * session : On success, pointer to the session object created / retrieved. |
|
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|
1394 * new : if not NULL, set to 1 on return if the session object has been created, 0 if it was simply retrieved. |
|
2
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|
1395 * |
|
3
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1396 * DESCRIPTION: |
|
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|
1397 * Retrieve a session object from a Session-Id string. Calling this function makes an implicit call to the |
|
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|
1398 * fd_sess_link function on the returned session. In case no session object was previously existing with this |
|
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1399 * id, a new object is silently created (equivalent to fd_sess_new with flag SESSION_NEW_FULL). |
|
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|
1400 * |
|
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1401 * RETURN VALUE: |
|
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1402 * 0 : The session parameter has been updated. |
|
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1403 * EINVAL : A parameter is invalid. |
|
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|
1404 * ENOMEM : Not enough memory to complete the operation |
|
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|
1405 */ |
|
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|
1406 int fd_sess_fromsid ( char * sid, size_t len, struct session ** session, int * new); |
|
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1407 |
|
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|
1408 /* |
|
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1409 * FUNCTION: fd_sess_getsid |
|
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1410 * |
|
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1411 * PARAMETERS: |
|
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1412 * session : Pointer to a session object. |
|
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1413 * sid : On success, the location of a (\0-terminated) string is stored here. |
|
2
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1414 * |
|
3
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|
1415 * DESCRIPTION: |
|
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|
1416 * Retrieve the session identifier (Session-Id) corresponding to a session object. |
|
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1417 * The returned sid is an UTF-8 string terminated by \0, suitable for calls to strlen and strcpy. |
|
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|
1418 * It may be used for example to set the value of an AVP. |
|
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1419 * Note that the sid string is not copied, just its reference... do not free it! |
|
2
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|
1420 * |
|
3
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1421 * RETURN VALUE: |
|
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1422 * 0 : The sid parameter has been updated. |
|
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1423 * EINVAL : A parameter is invalid. |
|
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|
1424 */ |
|
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|
1425 int fd_sess_getsid ( struct session * session, char ** sid ); |
|
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1426 |
|
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|
1427 /* |
|
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1428 * FUNCTION: fd_sess_settimeout |
|
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1429 * |
|
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1430 * PARAMETERS: |
|
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1431 * session : The session for which to set the timeout. |
|
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|
1432 * timeout : The date when the session times out. |
|
2
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1433 * |
|
3
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|
1434 * DESCRIPTION: |
|
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|
1435 * Set the lifetime for a given session object. This function may be |
|
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|
1436 * called several times on the same object to update the timeout value. |
|
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|
1437 * When the timeout date is reached, the cleanup handler of each |
|
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|
1438 * module that registered data with this session is called, then the |
|
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|
1439 * session is cleared. |
|
2
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|
1440 * |
|
3
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|
1441 * There is a possible race condition between cleanup of the session |
|
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|
1442 * and use of its data; applications should ensure that they are not |
|
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|
1443 * using data from a session that is about to expire / expired. |
|
2
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|
1444 * |
|
3
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1445 * RETURN VALUE: |
|
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1446 * 0 : The session timeout has been updated. |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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|
1447 * EINVAL : A parameter is invalid. |
|
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Progress; added session module; testsess to be completed
Sebastien Decugis <sdecugis@nict.go.jp>
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|
1448 */ |
|
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|
1449 int fd_sess_settimeout( struct session * session, const struct timespec * timeout ); |
|
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|
1450 |
|
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Progress; added session module; testsess to be completed
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parents:
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|
1451 /* |
|
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Progress; added session module; testsess to be completed
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|
1452 * FUNCTION: fd_sess_destroy |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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|
1453 * |
|
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Progress; added session module; testsess to be completed
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|
1454 * PARAMETERS: |
|
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1455 * session : Pointer to a session object. |
|
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|
1456 * |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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2
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|
1457 * DESCRIPTION: |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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1458 * Destroys a session an all associated data, if any. |
|
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Progress; added session module; testsess to be completed
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
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|
1459 * Equivalent to a session timeout expired, but the effect is immediate. |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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|
1460 * |
|
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|
1461 * RETURN VALUE: |
|
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Progress; added session module; testsess to be completed
Sebastien Decugis <sdecugis@nict.go.jp>
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|
1462 * 0 : The session no longer exists. |
|
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Progress; added session module; testsess to be completed
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|
1463 * EINVAL : A parameter is invalid. |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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|
1464 */ |
|
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|
1465 int fd_sess_destroy ( struct session ** session ); |
|
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|
1466 |
|
6
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|
1467 /* |
|
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5
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|
1468 * FUNCTION: fd_sess_reclaim |
|
b0d377c79d80
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|
1469 * |
|
b0d377c79d80
Progress on dispatch API spec; added fd_sess_reclaim function and test
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5
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|
1470 * PARAMETERS: |
|
b0d377c79d80
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|
1471 * session : Pointer to a session object. |
|
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|
1472 * |
|
b0d377c79d80
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5
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|
1473 * DESCRIPTION: |
|
b0d377c79d80
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5
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|
1474 * Destroys the resources of a session, only if no session_state is associated with it. |
|
b0d377c79d80
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|
1475 * |
|
b0d377c79d80
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5
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|
1476 * RETURN VALUE: |
|
b0d377c79d80
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5
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|
1477 * 0 : The session no longer exists. |
|
b0d377c79d80
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Sebastien Decugis <sdecugis@nict.go.jp>
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5
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|
1478 * EINVAL : A parameter is invalid. |
|
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Sebastien Decugis <sdecugis@nict.go.jp>
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5
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|
1479 */ |
|
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5
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|
1480 int fd_sess_reclaim ( struct session ** session ); |
|
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|
1481 |
|
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5
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|
1482 |
|
3
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|
1483 |
|
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|
1484 |
|
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|
1485 /* |
|
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|
1486 * FUNCTION: fd_sess_state_store |
|
2
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1
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|
1487 * |
|
3
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|
1488 * PARAMETERS: |
|
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1489 * handler : The handler with which the state is registered. |
|
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|
1490 * session : The session object with which the state is registered. |
|
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|
1491 * state : An application state (opaque data) to store with the session. |
|
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|
1492 * |
|
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|
1493 * DESCRIPTION: |
|
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|
1494 * Stores an application state with a session. This state can later be retrieved |
|
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|
1495 * with fd_sess_state_retrieve, or implicitly in the cleanup handler when the session |
|
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|
1496 * is destroyed. |
|
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|
1497 * |
|
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|
1498 * RETURN VALUE: |
|
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|
1499 * 0 : The state has been stored. |
|
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|
1500 * EINVAL : A parameter is invalid. |
|
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|
1501 * EALREADY : Data was already associated with this session and client. |
|
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|
1502 * ENOMEM : Not enough memory to complete the operation |
|
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|
1503 */ |
|
6
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|
1504 int fd_sess_state_store_internal ( struct session_handler * handler, struct session * session, session_state ** state ); |
|
5
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Sebastien Decugis <sdecugis@nict.go.jp>
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3
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|
1505 #define fd_sess_state_store( _handler, _session, _state ) \ |
|
6
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|
1506 fd_sess_state_store_internal( (_handler), (_session), (void *)(_state) ) |
|
3
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|
1507 |
|
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|
1508 /* |
|
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|
1509 * FUNCTION: fd_sess_state_retrieve |
|
2
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|
1510 * |
|
3
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|
1511 * PARAMETERS: |
|
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|
1512 * handler : The handler with which the state was registered. |
|
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|
1513 * session : The session object with which the state was registered. |
|
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|
1514 * state : Location where the state must be saved if it is found. |
|
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|
1515 * |
|
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|
1516 * DESCRIPTION: |
|
ef303f1078ab
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|
1517 * Retrieves a state saved by fd_sess_state_store. |
|
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|
1518 * After this function has been called, the state is no longer associated with |
|
ef303f1078ab
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|
1519 * the session. A new call to fd_sess_state_store must be performed in order to |
|
ef303f1078ab
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|
1520 * store again the data with the session. |
|
2
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|
1521 * |
|
3
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|
1522 * RETURN VALUE: |
|
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|
1523 * 0 : *state is updated (NULL or points to the state if it was found). |
|
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|
1524 * EINVAL : A parameter is invalid. |
|
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|
1525 */ |
|
6
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|
1526 int fd_sess_state_retrieve_internal ( struct session_handler * handler, struct session * session, session_state ** state ); |
|
5
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|
1527 #define fd_sess_state_retrieve( _handler, _session, _state ) \ |
|
6
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|
1528 fd_sess_state_retrieve_internal( (_handler), (_session), (void *)(_state) ) |
|
2
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|
1529 |
|
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|
1530 |
|
3
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|
1531 /* For debug */ |
|
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|
1532 void fd_sess_dump(int level, struct session * session); |
|
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|
1533 void fd_sess_dump_hdl(int level, struct session_handler * handler); |
|
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|
1534 |
|
2
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|
1535 |
|
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1536 /*============================================================*/ |
| 0 | 1537 /* MESSAGES */ |
| 1538 /*============================================================*/ | |
| 1539 | |
| 1540 /* The following types are opaque */ | |
| 1541 struct msg; /* A message: command with children AVPs (possibly grand children) */ | |
| 1542 struct avp; /* AVP object */ | |
| 1543 | |
| 1544 /* Some details about chaining: | |
| 1545 * | |
| 1546 * A message is made of a header ( msg ) and 0 or more AVPs ( avp ). | |
| 1547 * The structure is a kind of tree, where some AVPs (grouped AVPs) can contain other AVPs. | |
| 1548 * Exemple: | |
| 1549 * msg | |
| 1550 * |-avp | |
| 1551 * |-gavp | |
| 1552 * | |-avp | |
| 1553 * | |-avp | |
| 1554 * | \-avp | |
| 1555 * |-avp | |
| 1556 * \-avp | |
| 1557 * | |
| 1558 */ | |
| 1559 | |
| 1560 /* The following type is used to point to either a msg or an AVP */ | |
| 1561 typedef void msg_or_avp; | |
| 1562 | |
| 1563 /* The Diameter protocol version */ | |
| 1564 #define DIAMETER_VERSION 1 | |
| 1565 | |
| 1566 /* In the two following types, some fields are marked (READONLY). | |
| 1567 * This means that the content of these fields will be overwritten by the daemon so modifying it is useless. | |
| 1568 */ | |
| 1569 | |
| 1570 /* The following structure represents the header of a message. All data is in host byte order. */ | |
| 1571 struct msg_hdr { | |
| 1572 uint8_t msg_version; /* (READONLY) Version of Diameter: must be DIAMETER_VERSION. */ | |
| 1573 uint32_t msg_length; /* (READONLY)(3 bytes) indicates the length of the message */ | |
| 1574 uint8_t msg_flags; /* Message flags: CMD_FLAG_* */ | |
| 1575 command_code_t msg_code; /* (3 bytes) the command-code. See dictionary-api.h for more detail */ | |
| 1576 application_id_t msg_appl; /* The application issuing this message */ | |
| 1577 uint32_t msg_hbhid; /* The Hop-by-Hop identifier of the message */ | |
| 1578 uint32_t msg_eteid; /* The End-to-End identifier of the message */ | |
| 1579 }; | |
| 1580 | |
| 1581 /* The following structure represents the visible content of an AVP. All data is in host byte order. */ | |
| 1582 struct avp_hdr { | |
| 1583 avp_code_t avp_code; /* the AVP Code */ | |
| 1584 uint8_t avp_flags; /* AVP_FLAG_* flags */ | |
| 1585 uint32_t avp_len; /* (READONLY)(Only 3 bytes are used) the length of the AVP as described in the RFC */ | |
| 1586 vendor_id_t avp_vendor; /* Only used if AVP_FLAG_VENDOR is present */ | |
| 1587 union avp_value *avp_value; /* pointer to the value of the AVP. NULL means that the value is not set / not understood. | |
| 1588 One should not directly change this value. Use the msg_avp_setvalue function instead. | |
| 1589 The content of the pointed structure can be changed directly, with this restriction: | |
| 1590 if the AVP is an OctetString, and you change the value of the pointer avp_value->os.data, then | |
| 1591 you must call free() on the previous value, and the new one must be free()-able. | |
| 1592 */ | |
| 1593 }; | |
| 1594 | |
| 1595 /* The following enum is used to browse inside message hierarchy (msg, gavp, avp) */ | |
| 1596 enum msg_brw_dir { | |
| 1597 MSG_BRW_NEXT = 1, /* Get the next element at the same level, or NULL if this is the last element. */ | |
| 1598 MSG_BRW_PREV, /* Get the previous element at the same level, or NULL if this is the first element. */ | |
| 1599 MSG_BRW_FIRST_CHILD, /* Get the first child AVP of this element, if any. */ | |
| 1600 MSG_BRW_LAST_CHILD, /* Get the last child AVP of this element, if any. */ | |
| 1601 MSG_BRW_PARENT, /* Get the parent element of this element, if any. Only the msg_t object has no parent. */ | |
| 1602 MSG_BRW_WALK /* This is equivalent to FIRST_CHILD or NEXT or PARENT->next, first that is not NULL. Use this to walk inside all AVPs. */ | |
| 1603 }; | |
| 1604 | |
| 1605 /* Some flags used in the functions bellow */ | |
| 1606 #define MSGFL_ALLOC_ETEID 0x01 /* When creating a message, a new end-to-end ID is allocated and set in the message */ | |
| 1607 #define MSGFL_ANSW_ERROR 0x02 /* When creating an answer message, set the 'E' bit and use the generic error ABNF instead of command-specific ABNF */ | |
| 1608 #define MSGFL_MAX MSGFL_ANSW_ERROR /* The biggest valid flag value */ | |
| 1609 | |
| 1610 /**************************************************/ | |
| 1611 /* Message creation, manipulation, disposal */ | |
| 1612 /**************************************************/ | |
| 1613 /* | |
| 1614 * FUNCTION: fd_msg_avp_new | |
| 1615 * | |
| 1616 * PARAMETERS: | |
| 1617 * model : Pointer to a DICT_AVP dictionary object describing the avp to create, or NULL. | |
| 1618 * flags : Flags to use in creation (not used yet, should be 0). | |
| 1619 * avp : Upon success, pointer to the new avp is stored here. | |
| 1620 * | |
| 1621 * DESCRIPTION: | |
| 1622 * Create a new AVP instance. | |
| 1623 * | |
| 1624 * RETURN VALUE: | |
| 1625 * 0 : The AVP is created. | |
| 1626 * EINVAL : A parameter is invalid. | |
| 1627 * (other standard errors may be returned, too, with their standard meaning. Example: | |
| 1628 * ENOMEM : Memory allocation for the new avp failed.) | |
| 1629 */ | |
| 1630 int fd_msg_avp_new ( struct dict_object * model, int flags, struct avp ** avp ); | |
| 1631 | |
| 1632 /* | |
| 1633 * FUNCTION: fd_msg_new | |
| 1634 * | |
| 1635 * PARAMETERS: | |
| 1636 * model : Pointer to a DICT_COMMAND dictionary object describing the message to create, or NULL. | |
| 1637 * flags : combination of MSGFL_* flags. | |
| 1638 * msg : Upon success, pointer to the new message is stored here. | |
| 1639 * | |
| 1640 * DESCRIPTION: | |
| 1641 * Create a new empty Diameter message. | |
| 1642 * | |
| 1643 * RETURN VALUE: | |
| 1644 * 0 : The message is created. | |
| 1645 * EINVAL : A parameter is invalid. | |
| 1646 * (other standard errors may be returned, too, with their standard meaning. Example: | |
| 1647 * ENOMEM : Memory allocation for the new message failed.) | |
| 1648 */ | |
| 1649 int fd_msg_new ( struct dict_object * model, int flags, struct msg ** msg ); | |
| 1650 | |
| 1651 /* | |
| 1652 * FUNCTION: msg_new_answer_from_req | |
| 1653 * | |
| 1654 * PARAMETERS: | |
| 1655 * dict : Pointer to the dictionary containing the model of the query. | |
| 1656 * msg : The location of the query on function call. Updated by the location of answer message on return. | |
| 1657 * flag : Pass MSGFL_ANSW_ERROR to indicate if the answer is an error message (will set the 'E' bit) | |
| 1658 * | |
| 1659 * DESCRIPTION: | |
| 1660 * This function creates the empty answer message corresponding to a request. | |
| 1661 * The header is set properly (R flag, ccode, appid, hbhid, eteid) | |
| 1662 * The Session-Id AVP is copied if present. | |
| 1663 * The calling code should usually call fd_msg_rescode_set function on the answer. | |
| 1664 * Upon return, the original query may be retrieved by calling fd_msg_answ_getq on the message. | |
| 1665 * | |
| 1666 * RETURN VALUE: | |
| 1667 * 0 : Operation complete. | |
| 1668 * !0 : an error occurred. | |
| 1669 */ | |
| 1670 int fd_msg_new_answer_from_req ( struct dictionary * dict, struct msg ** msg, int flag ); | |
| 1671 | |
| 1672 /* | |
| 1673 * FUNCTION: fd_msg_browse | |
| 1674 * | |
| 1675 * PARAMETERS: | |
| 1676 * reference : Pointer to a struct msg or struct avp. | |
| 1677 * dir : Direction for browsing | |
| 1678 * found : If not NULL, updated with the element that has been found, if any, or NULL if no element was found / an error occurred. | |
| 1679 * depth : If not NULL, points to an integer representing the "depth" of this object in the tree. This is a relative value, updated on return. | |
| 1680 * | |
| 1681 * DESCRIPTION: | |
| 1682 * Explore the content of a message object (hierarchy). If "found" is null, only error checking is performed. | |
| 1683 * If "depth" is provided, it is updated as follow on successful function return: | |
| 1684 * - not modified for MSG_BRW_NEXT and MSG_BRW_PREV. | |
| 1685 * - *depth = *depth + 1 for MSG_BRW_FIRST_CHILD and MSG_BRW_LAST_CHILD. | |
| 1686 * - *depth = *depth - 1 for MSG_BRW_PARENT. | |
| 1687 * - *depth = *depth + X for MSG_BRW_WALK, with X between 1 (returned the 1st child) and -N (returned the Nth parent's next). | |
| 1688 * | |
| 1689 * RETURN VALUE: | |
| 1690 * 0 : found has been updated (if non NULL). | |
| 1691 * EINVAL : A parameter is invalid. | |
| 1692 * ENOENT : No element has been found where requested, and "found" was NULL (otherwise, *found is set to NULL and 0 is returned). | |
| 1693 */ | |
| 1694 int fd_msg_browse_internal ( msg_or_avp * reference, enum msg_brw_dir dir, msg_or_avp ** found, int * depth ); | |
| 1695 /* Macro to avoid having to cast the third parameter everywhere */ | |
| 1696 #define fd_msg_browse( ref, dir, found, depth ) \ | |
| 1697 fd_msg_browse_internal( (ref), (dir), (void *)(found), (depth) ) | |
| 1698 | |
| 1699 | |
| 1700 /* | |
| 1701 * FUNCTION: fd_msg_avp_add | |
| 1702 * | |
| 1703 * PARAMETERS: | |
| 1704 * reference : Pointer to a valid msg or avp. | |
| 1705 * dir : location where the new AVP should be inserted, relative to the reference. MSG_BRW_PARENT and MSG_BRW_WALK are not valid. | |
| 1706 * avp : pointer to the AVP object that must be inserted. | |
| 1707 * | |
| 1708 * DESCRIPTION: | |
| 1709 * Adds an AVP into an object that can contain it: grouped AVP or message. | |
| 1710 * | |
| 1711 * RETURN VALUE: | |
| 1712 * 0 : The AVP has been added. | |
| 1713 * EINVAL : A parameter is invalid. | |
| 1714 */ | |
| 1715 int fd_msg_avp_add ( msg_or_avp * reference, enum msg_brw_dir dir, struct avp *avp); | |
| 1716 | |
| 1717 /* | |
| 1718 * FUNCTION: fd_msg_search_avp | |
| 1719 * | |
| 1720 * PARAMETERS: | |
| 1721 * msg : The message structure in which to search the AVP. | |
| 1722 * what : The dictionary model of the AVP to search. | |
| 1723 * avp : location where the AVP reference is stored if found. | |
| 1724 * | |
| 1725 * DESCRIPTION: | |
| 1726 * Search the first top-level AVP of a given model inside a message. | |
| 1727 * Note: only the first instance of the AVP is returned by this function. | |
| 1728 * Note: only top-level AVPs are searched, not inside grouped AVPs. | |
| 1729 * Use msg_browse if you need more advanced research features. | |
| 1730 * | |
| 1731 * RETURN VALUE: | |
| 1732 * 0 : The AVP has been found. | |
| 1733 * EINVAL : A parameter is invalid. | |
| 1734 * ENOENT : No AVP has been found, and "avp" was NULL (otherwise, *avp is set to NULL and 0 returned). | |
| 1735 */ | |
| 1736 int fd_msg_search_avp ( struct msg * msg, struct dict_object * what, struct avp ** avp ); | |
| 1737 | |
| 1738 /* | |
| 1739 * FUNCTION: fd_msg_free | |
| 1740 * | |
| 1741 * PARAMETERS: | |
| 1742 * object : pointer to the message or AVP object that must be unlinked and freed. | |
| 1743 * | |
| 1744 * DESCRIPTION: | |
| 1745 * Unlink and free a message or AVP object and its children. | |
| 1746 * If the object is an AVP linked into a message, the AVP is removed before being freed. | |
| 1747 * | |
| 1748 * RETURN VALUE: | |
| 1749 * 0 : The message has been freed. | |
| 1750 * EINVAL : A parameter is invalid. | |
| 1751 */ | |
| 1752 int fd_msg_free ( msg_or_avp * object ); | |
| 1753 | |
| 1754 /***************************************/ | |
| 1755 /* Dump functions */ | |
| 1756 /***************************************/ | |
| 1757 /* | |
| 1758 * FUNCTION: fd_msg_dump_* | |
| 1759 * | |
| 1760 * PARAMETERS: | |
| 1761 * level : the log level (INFO, FULL, ...) at which the object is dumped | |
| 1762 * obj : A msg or avp object. | |
| 1763 * | |
| 1764 * DESCRIPTION: | |
| 1765 * These functions dump the content of a message to the debug log | |
| 1766 * either recursively or only the object itself. | |
| 1767 * | |
| 1768 * RETURN VALUE: | |
| 1769 * - | |
| 1770 */ | |
| 1771 void fd_msg_dump_walk ( int level, msg_or_avp *obj ); | |
| 1772 void fd_msg_dump_one ( int level, msg_or_avp *obj ); | |
| 1773 | |
| 1774 | |
| 1775 /*********************************************/ | |
| 1776 /* Message metadata management functions */ | |
| 1777 /*********************************************/ | |
| 1778 /* | |
| 1779 * FUNCTION: fd_msg_model | |
| 1780 * | |
| 1781 * PARAMETERS: | |
| 1782 * reference : Pointer to a valid msg or avp. | |
| 1783 * model : on success, pointer to the dictionary model of this command or AVP. NULL if the model is unknown. | |
| 1784 * | |
| 1785 * DESCRIPTION: | |
| 1786 * Retrieve the dictionary object describing this message or avp. If the object is unknown or the fd_msg_parse_dict has not been called, | |
| 1787 * *model is set to NULL. | |
| 1788 * | |
| 1789 * RETURN VALUE: | |
| 1790 * 0 : The model has been set. | |
| 1791 * EINVAL : A parameter is invalid. | |
| 1792 */ | |
| 1793 int fd_msg_model ( msg_or_avp * reference, struct dict_object ** model ); | |
| 1794 | |
| 1795 /* | |
| 1796 * FUNCTION: fd_msg_hdr | |
| 1797 * | |
| 1798 * PARAMETERS: | |
| 1799 * msg : Pointer to a valid message object. | |
| 1800 * pdata : Upon success, pointer to the msg_hdr structure of this message. The fields may be modified. | |
| 1801 * | |
| 1802 * DESCRIPTION: | |
| 1803 * Retrieve location of modifiable section of a message. | |
| 1804 * | |
| 1805 * RETURN VALUE: | |
| 1806 * 0 : The location has been written. | |
| 1807 * EINVAL : A parameter is invalid. | |
| 1808 */ | |
| 1809 int fd_msg_hdr ( struct msg *msg, struct msg_hdr **pdata ); | |
| 1810 | |
| 1811 /* | |
| 1812 * FUNCTION: fd_msg_avp_hdr | |
| 1813 * | |
| 1814 * PARAMETERS: | |
| 1815 * avp : Pointer to a valid avp object. | |
| 1816 * pdata : Upon success, pointer to the avp_hdr structure of this avp. The fields may be modified. | |
| 1817 * | |
| 1818 * DESCRIPTION: | |
| 1819 * Retrieve location of modifiable data of an avp. | |
| 1820 * | |
| 1821 * RETURN VALUE: | |
| 1822 * 0 : The location has been written. | |
| 1823 * EINVAL : A parameter is invalid. | |
| 1824 */ | |
| 1825 int fd_msg_avp_hdr ( struct avp *avp, struct avp_hdr **pdata ); | |
| 1826 | |
| 1827 /* | |
| 1828 * FUNCTION: fd_msg_answ_associate, fd_msg_answ_getq, fd_msg_answ_detach | |
| 1829 * | |
| 1830 * PARAMETERS: | |
| 1831 * answer : the received answer message | |
| 1832 * query : the corresponding query that had been sent | |
| 1833 * | |
| 1834 * DESCRIPTION: | |
| 1835 * fd_msg_answ_associate associates a query msg with the received answer. | |
| 1836 * Query is retrieved with fd_msg_answ_getq. | |
| 1837 * If answer message is freed, the query is also freed. | |
| 1838 * If the msg_answ_detach function is called, the association is removed. | |
| 1839 * This is meant to be called from the daemon only. | |
| 1840 * | |
| 1841 * RETURN VALUE: | |
| 1842 * 0 : ok | |
| 1843 * EINVAL: a parameter is invalid | |
| 1844 */ | |
| 1845 int fd_msg_answ_associate( struct msg * answer, struct msg * query ); | |
| 1846 int fd_msg_answ_getq ( struct msg * answer, struct msg ** query ); | |
| 1847 int fd_msg_answ_detach ( struct msg * answer ); | |
| 1848 | |
| 1849 /* | |
| 1850 * FUNCTION: fd_msg_anscb_associate, fd_msg_anscb_get | |
| 1851 * | |
| 1852 * PARAMETERS: | |
| 1853 * msg : the answer message | |
| 1854 * anscb : the callback to associate with the message | |
| 1855 * data : the data to pass to the callback | |
| 1856 * | |
| 1857 * DESCRIPTION: | |
| 1858 * Associate or retrieve a callback with an answer message. | |
| 1859 * This is meant to be called from the daemon only. | |
| 1860 * | |
| 1861 * RETURN VALUE: | |
| 1862 * 0 : ok | |
| 1863 * EINVAL: a parameter is invalid | |
| 1864 */ | |
| 1865 int fd_msg_anscb_associate( struct msg * msg, void ( *anscb)(void *, struct msg **), void * data ); | |
| 1866 int fd_msg_anscb_get ( struct msg * msg, void (**anscb)(void *, struct msg **), void ** data ); | |
| 1867 | |
| 1868 /* | |
| 1869 * FUNCTION: fd_msg_rt_associate, fd_msg_rt_get | |
| 1870 * | |
| 1871 * PARAMETERS: | |
| 1872 * msg : the query message to be sent | |
| 1873 * list : the ordered list of possible next-peers | |
| 1874 * | |
| 1875 * DESCRIPTION: | |
| 1876 * Associate a routing list with a query, and retrieve it. | |
| 1877 * If the message is freed, the list is also freed. | |
| 1878 * | |
| 1879 * RETURN VALUE: | |
| 1880 * 0 : ok | |
| 1881 * EINVAL: a parameter is invalid | |
| 1882 */ | |
| 1883 int fd_msg_rt_associate( struct msg * msg, struct fd_list ** list ); | |
| 1884 int fd_msg_rt_get ( struct msg * msg, struct fd_list ** list ); | |
| 1885 | |
| 1886 /* | |
| 1887 * FUNCTION: fd_msg_is_routable | |
| 1888 * | |
| 1889 * PARAMETERS: | |
| 1890 * msg : A msg object. | |
| 1891 * | |
| 1892 * DESCRIPTION: | |
| 1893 * This function returns a boolean telling if a given message is routable in the Diameter network, | |
| 1894 * or if it is a local link message only (ex: CER/CEA, DWR/DWA, ...). | |
| 1895 * | |
| 1896 * RETURN VALUE: | |
| 1897 * 0 : The message is not routable / an error occurred. | |
| 1898 * 1 : The message is routable. | |
| 1899 */ | |
| 1900 int fd_msg_is_routable ( struct msg * msg ); | |
| 1901 | |
| 1902 /* | |
| 1903 * FUNCTION: fd_msg_source_(g/s)et | |
| 1904 * | |
| 1905 * PARAMETERS: | |
| 1906 * msg : A msg object. | |
| 1907 * diamid : The diameter id of the peer from which this message was received. | |
| 1908 * hash : The hash for the diamid value. | |
| 1909 * add_rr : if true, a Route-Record AVP is added to the message with content diamid. In that case, dict must be supplied. | |
| 1910 * dict : a dictionary with definition of Route-Record AVP (if add_rr is true) | |
| 1911 * | |
| 1912 * DESCRIPTION: | |
| 1913 * Store or retrieve the diameted id of the peer from which this message was received. | |
| 1914 * Will be used for example by the routing module to add the Route-Record AVP in forwarded requests, | |
| 1915 * or to direct answers to the appropriate peer. | |
| 1916 * | |
| 1917 * RETURN VALUE: | |
| 1918 * 0 : Operation complete. | |
| 1919 * !0 : an error occurred. | |
| 1920 */ | |
| 1921 int fd_msg_source_set( struct msg * msg, char * diamid, uint32_t hash, int add_rr, struct dictionary * dict ); | |
| 1922 int fd_msg_source_get( struct msg * msg, char ** diamid, uint32_t *hash ); | |
| 1923 | |
| 1924 /* | |
| 1925 * FUNCTION: fd_msg_eteid_get | |
| 1926 * | |
| 1927 * PARAMETERS: | |
| 1928 * - | |
| 1929 * | |
| 1930 * DESCRIPTION: | |
| 1931 * Get a new unique end-to-end id value for the local peer. | |
| 1932 * | |
| 1933 * RETURN VALUE: | |
| 1934 * The new assigned value. No error code is defined. | |
| 1935 */ | |
| 1936 uint32_t fd_msg_eteid_get ( void ); | |
| 1937 | |
| 1938 | |
| 1939 /***************************************/ | |
| 1940 /* Manage AVP values */ | |
| 1941 /***************************************/ | |
| 1942 | |
| 1943 /* | |
| 1944 * FUNCTION: fd_msg_avp_setvalue | |
| 1945 * | |
| 1946 * PARAMETERS: | |
| 1947 * avp : Pointer to a valid avp object with a NULL avp_value pointer. The model must be known. | |
| 1948 * value : pointer to an avp_value. The content will be COPIED into the internal storage area. | |
| 1949 * If data type is an octetstring, the data is also copied. | |
| 1950 * If value is a NULL pointer, the previous data is erased and value is unset in the AVP. | |
| 1951 * | |
| 1952 * DESCRIPTION: | |
| 1953 * Initialize the avp_value field of an AVP header. | |
| 1954 * | |
| 1955 * RETURN VALUE: | |
| 1956 * 0 : The avp_value pointer has been set. | |
| 1957 * EINVAL : A parameter is invalid. | |
| 1958 */ | |
| 1959 int fd_msg_avp_setvalue ( struct avp *avp, union avp_value *value ); | |
| 1960 | |
| 1961 /* | |
| 1962 * FUNCTION: fd_msg_avp_value_encode | |
| 1963 * | |
| 1964 * PARAMETERS: | |
| 1965 * avp : Pointer to a valid avp object with a NULL avp_value. The model must be known. | |
| 1966 * data : Pointer to the data that must be encoded as AVP value and stored in the AVP. | |
| 1967 * This is only valid for AVPs of derived type for which type_data_encode callback is set. (ex: Address type) | |
| 1968 * | |
| 1969 * DESCRIPTION: | |
| 1970 * Initialize the avp_value field of an AVP object from formatted data, using the AVP's type "type_data_encode" callback. | |
| 1971 * | |
| 1972 * RETURN VALUE: | |
| 1973 * 0 : The avp_value has been set. | |
| 1974 * EINVAL : A parameter is invalid. | |
| 1975 * ENOTSUP : There is no appropriate callback registered with this AVP's type. | |
| 1976 */ | |
| 1977 int fd_msg_avp_value_encode ( void *data, struct avp *avp ); | |
| 1978 | |
| 1979 /* | |
| 1980 * FUNCTION: fd_msg_avp_value_interpret | |
| 1981 * | |
| 1982 * PARAMETERS: | |
| 1983 * avp : Pointer to a valid avp object with a non-NULL avp_value value. | |
| 1984 * data : Upon success, formatted interpretation of the AVP value is stored here. | |
| 1985 * | |
| 1986 * DESCRIPTION: | |
| 1987 * Interpret the content of an AVP of Derived type and store the result in data pointer. The structure | |
| 1988 * of the data pointer is dependent on the AVP type. This function calls the "type_data_interpret" callback | |
| 1989 * of the type. | |
| 1990 * | |
| 1991 * RETURN VALUE: | |
| 1992 * 0 : The avp_value has been set. | |
| 1993 * EINVAL : A parameter is invalid. | |
| 1994 * ENOTSUP : There is no appropriate callback registered with this AVP's type. | |
| 1995 */ | |
| 1996 int fd_msg_avp_value_interpret ( struct avp *avp, void *data ); | |
| 1997 | |
| 1998 | |
| 1999 /***************************************/ | |
| 2000 /* Message parsing functions */ | |
| 2001 /***************************************/ | |
| 2002 | |
| 2003 /* | |
| 2004 * FUNCTION: fd_msg_bufferize | |
| 2005 * | |
| 2006 * PARAMETERS: | |
| 2007 * msg : A valid msg object. All AVPs must have a value set. | |
| 2008 * buffer : Upon success, this points to a buffer (malloc'd) containing the message ready for network transmission (or security transformations). | |
| 2009 * The buffer may be freed after use. | |
| 2010 * len : if not NULL, the size of the buffer is written here. In any case, this size is updated in the msg header. | |
| 2011 * | |
| 2012 * DESCRIPTION: | |
| 2013 * Renders a message in memory as a buffer that can be sent over the network to the next peer. | |
| 2014 * | |
| 2015 * RETURN VALUE: | |
| 2016 * 0 : The location has been written. | |
| 2017 * EINVAL : The buffer does not contain a valid Diameter message. | |
| 2018 * ENOMEM : Unable to allocate enough memory to create the buffer object. | |
| 2019 */ | |
| 2020 int fd_msg_bufferize ( struct msg * msg, unsigned char ** buffer, size_t * len ); | |
| 2021 | |
| 2022 /* | |
| 2023 * FUNCTION: fd_msg_parse_buffer | |
| 2024 * | |
| 2025 * PARAMETERS: | |
| 2026 * buffer : Pointer to a buffer containing a message received from the network. | |
| 2027 * buflen : the size in bytes of the buffer. | |
| 2028 * msg : Upon success, this points to a valid msg object. No AVP value is resolved in this object, nor grouped AVP. | |
| 2029 * | |
| 2030 * DESCRIPTION: | |
| 2031 * This function parses a buffer an creates a msg object to represent the structure of the message. | |
| 2032 * Since no dictionary lookup is performed, the values of the AVPs are not interpreted. To interpret the values, | |
| 2033 * the returned message object must be passed to fd_msg_parse_dict function. | |
| 2034 * The buffer pointer is saved inside the message and will be freed when not needed anymore. | |
| 2035 * | |
| 2036 * RETURN VALUE: | |
| 2037 * 0 : The location has been written. | |
| 2038 * ENOMEM : Unable to allocate enough memory to create the msg object. | |
| 2039 * EBADMSG : The buffer does not contain a valid Diameter message (or is truncated). | |
| 2040 * EINVAL : A parameter is invalid. | |
| 2041 */ | |
| 2042 int fd_msg_parse_buffer ( unsigned char ** buffer, size_t buflen, struct msg ** msg ); | |
| 2043 | |
| 2044 /* | |
| 2045 * FUNCTION: fd_msg_parse_dict | |
| 2046 * | |
| 2047 * PARAMETERS: | |
| 2048 * object : A msg or AVP object as returned by fd_msg_parse_buffer. | |
| 2049 * dict : the dictionary containing the objects definitions to use for resolving all AVPs. | |
| 2050 * | |
| 2051 * DESCRIPTION: | |
| 2052 * This function looks up for the command and each children AVP definitions in the dictionary. | |
| 2053 * If the dictionary definition is found, avp_model is set and the value of the AVP is interpreted accordingly and: | |
| 2054 * - for grouped AVPs, the children AVP are created and interpreted also. | |
| 2055 * - for numerical AVPs, the value is converted to host byte order and saved in the avp_value field. | |
| 2056 * - for octetstring AVPs, the string is copied into a new buffer and its address is saved in avp_value. | |
| 2057 * If the dictionary definition is not found, avp_model is set to NULL and | |
| 2058 * the content of the AVP is saved as an octetstring in an internal structure. avp_value is NULL. | |
| 2059 * As a result, after this function has been called, there is no more dependency of the msg object to the message buffer, that is be freed. | |
| 2060 * | |
| 2061 * RETURN VALUE: | |
| 2062 * 0 : The message has been fully parsed as described. | |
| 2063 * EINVAL : The msg parameter is invalid for this operation. | |
| 2064 * ENOMEM : Unable to allocate enough memory to complete the operation. | |
| 2065 * ENOTSUP : No dictionary definition for the command or one of the mandatory AVP was found. | |
| 2066 */ | |
| 2067 int fd_msg_parse_dict ( msg_or_avp * object, struct dictionary * dict ); | |
| 2068 | |
| 2069 /* | |
| 2070 * FUNCTION: fd_msg_parse_rules | |
| 2071 * | |
| 2072 * PARAMETERS: | |
| 2073 * object : A msg or grouped avp object that must be verified. | |
| 2074 * dict : The dictionary containing the rules definitions. | |
| 2075 * rule : If not NULL, the first conflicting rule will be saved here if a conflict is found. | |
| 2076 * | |
| 2077 * DESCRIPTION: | |
| 2078 * Check that the children of the object do not conflict with the dictionary rules (ABNF compliance). | |
| 2079 * | |
| 2080 * RETURN VALUE: | |
| 2081 * 0 : The message has been fully parsed and complies to the defined rules. | |
| 2082 * EBADMSG : A conflict was detected, or a mandatory AVP is unknown in the dictionary. | |
| 2083 * EINVAL : The msg or avp object is invalid for this operation. | |
| 2084 * ENOMEM : Unable to allocate enough memory to complete the operation. | |
| 2085 */ | |
| 2086 int fd_msg_parse_rules ( msg_or_avp * object, struct dictionary * dict, struct dict_object ** rule); | |
| 2087 | |
| 2088 | |
| 2089 /* | |
| 2090 * FUNCTION: fd_msg_update_length | |
| 2091 * | |
| 2092 * PARAMETERS: | |
| 2093 * object : Pointer to a valid msg or avp. | |
| 2094 * | |
| 2095 * DESCRIPTION: | |
| 2096 * Update the length field of the object passed as parameter. | |
| 2097 * As a side effect, all children objects are also updated. Therefore, all avp_value fields of | |
| 2098 * the children AVPs must be set, or an error will occur. | |
| 2099 * | |
| 2100 * RETURN VALUE: | |
| 2101 * 0 : The size has been recomputed. | |
| 2102 * EINVAL : A parameter is invalid. | |
| 2103 */ | |
| 2104 int fd_msg_update_length ( msg_or_avp * object ); | |
| 2105 | |
| 2106 | |
|
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2107 /*============================================================*/ |
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2108 /* DISPATCH */ |
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2109 /*============================================================*/ |
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2110 |
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2111 /* Dispatch module (passing incoming messages to extensions registered callbacks) |
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2112 * is split between the library and the daemon. |
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2113 * |
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2114 * The library provides the support for associating dispatch callbacks with |
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2115 * dictionary objects. |
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2116 * |
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2117 * The daemon is responsible for calling the callbacks for a message when appropriate. |
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2118 * |
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2119 * |
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2120 * The dispatch module has two main roles: |
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2121 * - help determine if a message can be handled locally (during the routing step) |
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2122 * This decision involves only the application-id of the message. |
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2123 * - pass the message to the callback(s) that will handle it (during the dispatch step) |
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2124 * |
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2125 * The first role is handled by the daemon. |
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2126 * |
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2127 * About the second, these are the possibilities for registering a dispatch callback: |
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2128 * |
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2129 * -> For All messages. |
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2130 * This callback is called for all messages that are handled locally. This should be used only |
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2131 * for debug purpose. |
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2132 * |
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2133 * -> by AVP value (constants only). |
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2134 * This callback will be called when a message is received and contains an AVP with a specified enumerated value. |
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2135 * |
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2136 * -> by AVP. |
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2137 * This callback will be called when the received message contains a certain AVP. |
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2138 * |
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2139 * -> by command-code. |
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2140 * This callback will be called when the message is a specific command (and 'R' flag). |
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2141 * |
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2142 * -> by application. |
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2143 * This callback will be called when the message has a specific application-id. |
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2144 * |
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2145 * ( by vendor: would this be useful? it may be added later) |
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2146 */ |
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2147 enum disp_how { |
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2148 DISP_HOW_ANY = 1, /* Any message. This should be only used for debug. */ |
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2149 DISP_HOW_APPID, /* Any message with the specified application-id */ |
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2150 DISP_HOW_CC, /* Messages of the specified command-code (request or answer). App id may be specified. */ |
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2151 DISP_HOW_AVP, /* Messages containing a specific AVP. Command-code and App id may be specified. */ |
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2152 DISP_HOW_AVP_ENUMVAL /* Messages containing a specific AVP with a specific enumerated value. Command-code and App id may be specified. */ |
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2153 }; |
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2154 /* |
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2155 * Several criteria may be selected at the same time, for example command-code AND application id. |
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2156 * |
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2157 * If several callbacks are registered for the same object, they are called in the order they were registered. |
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2158 * The order in which the callbacks are called is: |
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2159 * DISP_HOW_ANY |
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2160 * DISP_HOW_AVP_ENUMVAL & DISP_HOW_AVP |
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2161 * DISP_HOW_CC |
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2162 * DISP_HOW_APPID |
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2163 */ |
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2164 |
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2165 /* When a callback is registered, a "when" argument is passed in addition to the disp_how value, |
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2166 * to specify which values the criteria must match. */ |
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2167 struct disp_when { |
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2168 struct dict_object * app; |
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2169 struct dict_object * command; |
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2170 struct dict_object * avp; |
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2171 struct dict_object * value; |
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2172 }; |
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2173 |
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2174 /* Note that all the dictionary objects should really belong to the same dictionary! |
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2175 * |
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2176 * Here is the details on this "when" argument, depending on the disp_how value. |
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2177 * |
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2178 * DISP_HOW_ANY. |
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2179 * In this case, "when" must be NULL. |
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2180 * |
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2181 * DISP_HOW_APPID. |
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2182 * Only the "app_id" field must be set, other fields are ignored. It points to a dictionary object of type DICT_APPLICATION. |
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2183 * |
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2184 * DISP_HOW_CC. |
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2185 * The "command" field must be defined and point to a dictionary object of type DICT_COMMAND. |
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2186 * The "app_id" may be also set. In the case it is set, it restricts the callback to be called only with this command-code and app id. |
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2187 * The other fields are ignored. |
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2188 * |
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2189 * DISP_HOW_AVP. |
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2190 * The "avp" field of the structure must be set and point to a dictionary object of type DICT_AVP. |
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2191 * The "app_id" field may be set to restrict the messages matching to a specific app id. |
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2192 * The "command" field may also be set to a valid DICT_COMMAND object. |
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2193 * The content of the "value" field is ignored. |
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2194 * |
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2195 * DISP_HOW_AVP_ENUMVAL. |
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2196 * All fields have the same constraints and meaning as in DISP_REG_AVP. In addition, the "value" field must be set |
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2197 * and points to a valid DICT_ENUMVAL object. |
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2198 * |
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2199 * Here is a sumary of the fields: ( M : must be set; m : may be set; 0 : ignored ) |
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2200 * field: app_id command avp value |
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2201 * APPID : M 0 0 0 |
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2202 * CC : m M 0 0 |
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2203 * AVP : m m M 0 |
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2204 * ENUMVA: m m M M |
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2205 */ |
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2206 |
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2207 enum disp_action { |
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2208 DISP_ACT_CONT, /* The next handler should be called, unless *msg == NULL. */ |
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2209 DISP_ACT_SEND /* The updated message must be sent. No further callback is called. */ |
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2210 }; |
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2211 /* The callbacks that are registered have the following prototype: |
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2212 * int dispatch_callback( struct msg ** msg, struct avp * avp, struct session * session, enum disp_action * action ); |
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2213 * |
|
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2214 * CALLBACK: dispatch_callback |
|
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2215 * |
|
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|
2216 * PARAMETERS: |
|
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2217 * msg : the received message on function entry. may be updated to answer on return (see description) |
|
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Added dispatch module and tests
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2218 * avp : for callbacks registered with DISP_HOW_AVP or DISP_HOW_AVP_ENUMVAL, direct link to the triggering AVP. |
|
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diff
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2219 * session : if the message contains a Session-Id AVP, the corresponding session object, NULL otherwise. |
|
e5af94b04946
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|
2220 * action : upon return, this tells the daemon what to do next. |
|
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|
2221 * |
|
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|
2222 * DESCRIPTION: |
|
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Added dispatch module and tests
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2223 * Called when a received message matchs the condition for which the callback was registered. |
|
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2224 * This callback may do any kind of processing on the message, including: |
|
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2225 * - create an answer for a request. |
|
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Added dispatch module and tests
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2226 * - proxy a request or message, add / remove the Proxy-Info AVP, then forward the message. |
|
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2227 * - update a routing table or start a connection with a new peer, then forward the message. |
|
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2228 * - ... |
|
e5af94b04946
Added dispatch module and tests
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|
2229 * |
|
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2230 * When *action == DISP_ACT_SEND on callback return, the msg pointed by *msg is passed to the routing module for sending. |
|
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2231 * When *action == DISP_ACT_CONT, the next registered callback is called. |
|
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2232 * When the last callback gives also DISP_ACT_CONT action value, a default handler is called. It's behavior is as follow: |
|
e5af94b04946
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2233 * - if the message is an answer, it is discarded. |
|
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Added dispatch module and tests
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2234 * - if the message is a request, it is passed again to the routing stack, and marked as non-local handling. |
|
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2235 * |
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2236 * RETURN VALUE: |
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2237 * 0 : The callback executed successfully and updated *action appropriately. |
|
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2238 * !0 : standard errors. In case of error, the message is discarded. |
|
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2239 */ |
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2240 |
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2241 /* This structure represents a handler for a registered callback, allowing its de-registration */ |
|
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2242 struct disp_hdl; |
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2243 |
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2244 /* |
|
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2245 * FUNCTION: fd_disp_register |
|
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2246 * |
|
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2247 * PARAMETERS: |
|
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2248 * cb : The callback function to register (see dispatch_callback description above). |
|
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2249 * how : How the callback must be registered. |
|
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2250 * when : Values that must match, depending on the how argument. |
|
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2251 * handle : On success, a handler to the registered callback is stored here if not NULL. |
|
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2252 * This handler can be used to unregister the cb. |
|
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2253 * |
|
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2254 * DESCRIPTION: |
|
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2255 * Register a new callback to handle messages delivered locally. |
|
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2256 * |
|
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|
2257 * RETURN VALUE: |
|
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2258 * 0 : The callback is registered. |
|
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2259 * EINVAL : A parameter is invalid. |
|
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2260 * ENOMEM : Not enough memory to complete the operation |
|
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2261 */ |
|
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2262 int fd_disp_register ( int (*cb)( struct msg **, struct avp *, struct session *, enum disp_action *), |
|
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2263 enum disp_how how, struct disp_when * when, struct disp_hdl ** handle ); |
|
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2264 |
|
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2265 /* |
|
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2266 * FUNCTION: fd_disp_unregister |
|
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2267 * |
|
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|
2268 * PARAMETERS: |
|
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2269 * handle : Location of the handle of the callback that must be unregistered. |
|
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2270 * |
|
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2271 * DESCRIPTION: |
|
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2272 * Removes a callback previously registered by fd_disp_register. |
|
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|
2273 * |
|
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|
2274 * RETURN VALUE: |
|
e5af94b04946
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|
2275 * 0 : The callback is unregistered. |
|
e5af94b04946
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6
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|
2276 * EINVAL : A parameter is invalid. |
|
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|
2277 */ |
|
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|
2278 int fd_disp_unregister ( struct disp_hdl ** handle ); |
|
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|
2279 |
|
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|
2280 /* |
|
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|
2281 * FUNCTION: fd_msg_dispatch |
|
e5af94b04946
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|
2282 * |
|
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|
2283 * PARAMETERS: |
|
e5af94b04946
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2284 * msg : A msg object that have already been fd_msg_parse_dict. |
|
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2285 * session : The session corresponding to this object, if any. |
|
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6
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2286 * action : Upon return, the action that must be taken on the message |
|
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|
2287 * |
|
e5af94b04946
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|
2288 * DESCRIPTION: |
|
e5af94b04946
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|
2289 * Call all handlers registered for a given message. |
|
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|
2290 * The session must have already been resolved on entry. |
|
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|
2291 * The msg pointed may be updated during this process. |
|
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6
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|
2292 * Upon return, the action parameter points to what must be done next. |
|
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6
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|
2293 * |
|
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6
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|
2294 * RETURN VALUE: |
|
e5af94b04946
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|
2295 * 0 : Success. |
|
e5af94b04946
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|
2296 * EINVAL : A parameter is invalid. |
|
e5af94b04946
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6
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|
2297 * (other errors) |
|
e5af94b04946
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|
2298 */ |
|
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|
2299 int fd_msg_dispatch ( struct msg ** msg, struct session * session, enum disp_action *action ); |
|
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|
2300 |
|
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|
2301 |
| 0 | 2302 |
| 2303 /*============================================================*/ | |
|
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2304 /* QUEUES */ |
| 0 | 2305 /*============================================================*/ |
| 2306 | |
|
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2307 /* Management of FIFO queues of elements */ |
| 0 | 2308 |
|
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2309 /* A queue is an opaque object */ |
|
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2310 struct fifo; |
| 0 | 2311 |
| 2312 /* | |
|
8
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2313 * FUNCTION: fd_fifo_new |
| 0 | 2314 * |
| 2315 * PARAMETERS: | |
|
8
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2316 * queue : Upon success, a pointer to the new queue is saved here. |
| 0 | 2317 * |
| 2318 * DESCRIPTION: | |
|
8
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2319 * Create a new empty queue. |
| 0 | 2320 * |
| 2321 * RETURN VALUE : | |
|
8
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2322 * 0 : The queue has been initialized successfully. |
| 0 | 2323 * EINVAL : The parameter is invalid. |
| 2324 * ENOMEM : Not enough memory to complete the creation. | |
| 2325 */ | |
|
8
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2326 int fd_fifo_new ( struct fifo ** queue ); |
| 0 | 2327 |
| 2328 /* | |
|
8
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2329 * FUNCTION: fd_fifo_del |
| 0 | 2330 * |
| 2331 * PARAMETERS: | |
|
8
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2332 * queue : Pointer to an empty queue to delete. |
| 0 | 2333 * |
| 2334 * DESCRIPTION: | |
|
8
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2335 * Destroys a queue. This is only possible if no thread is waiting for an element, |
| 0 | 2336 * and the queue is empty. |
| 2337 * | |
| 2338 * RETURN VALUE: | |
|
8
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2339 * 0 : The queue has been destroyed successfully. |
| 0 | 2340 * EINVAL : The parameter is invalid. |
| 2341 */ | |
|
8
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|
2342 int fd_fifo_del ( struct fifo ** queue ); |
| 0 | 2343 |
| 2344 /* | |
|
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2345 * FUNCTION: fd_fifo_length |
| 0 | 2346 * |
| 2347 * PARAMETERS: | |
|
8
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|
2348 * queue : The queue from which to retrieve the number of elements. |
|
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2349 * length : Upon success, the current number of elements in the queue is stored here. |
| 0 | 2350 * |
| 2351 * DESCRIPTION: | |
|
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2352 * Retrieve the number of elements in a queue. |
| 0 | 2353 * |
| 2354 * RETURN VALUE: | |
| 2355 * 0 : The length of the queue has been written. | |
| 2356 * EINVAL : A parameter is invalid. | |
| 2357 */ | |
|
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2358 int fd_fifo_length ( struct fifo * queue, int * length ); |
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2359 int fd_fifo_length_noerr ( struct fifo * queue ); /* no error checking version */ |
| 0 | 2360 |
| 2361 /* | |
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2362 * FUNCTION: fd_fifo_setthrhd |
| 0 | 2363 * |
| 2364 * PARAMETERS: | |
| 2365 * queue : The queue for which the thresholds are being set. | |
| 2366 * data : An opaque pointer that is passed to h_cb and l_cb callbacks. | |
| 2367 * high : The high-level threshold. If the number of elements in the queue increase to this value, h_cb is called. | |
| 2368 * h_cb : if not NULL, a callback to call when the queue lengh is bigger than "high". | |
| 2369 * low : The low-level threshold. Must be < high. | |
| 2370 * l_cb : If the number of elements decrease to low, this callback is called. | |
| 2371 * | |
| 2372 * DESCRIPTION: | |
| 2373 * This function allows to adjust the number of producer / consumer threads of a queue. | |
|
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2374 * If the consumer are slower than the producers, the number of elements in the queue increase. |
| 0 | 2375 * By setting a "high" value, we allow a callback to be called when this number is too high. |
| 2376 * The typical use would be to create an additional consumer thread in this callback. | |
| 2377 * If the queue continues to grow, the callback will be called again when the length is 2 * high, then 3*high, ... N * high | |
|
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2378 * (the callback itself should implement a limit on the number of consumers that can be created) |
| 0 | 2379 * When the queue starts to decrease, and the number of elements go under ((N - 1) * high + low, the l_cb callback is called |
|
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2380 * and would typially stop one of the consumer threads. If the queue continues to reduce, l_cb is again called at (N-2)*high + low, |
| 0 | 2381 * and so on. |
| 2382 * | |
| 2383 * Since there is no destructor for the data pointer, if cleanup operations are required, they should be performed in | |
| 2384 * l_cb when the length of the queue is becoming < low. | |
| 2385 * | |
|
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2386 * Note that the callbacks are called synchronously, during fd_fifo_post or fd_fifo_get. Their operation should be quick. |
| 0 | 2387 * |
| 2388 * RETURN VALUE: | |
| 2389 * 0 : The thresholds have been set | |
| 2390 * EINVAL : A parameter is invalid. | |
| 2391 */ | |
|
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2392 int fd_fifo_setthrhd ( struct fifo * queue, void * data, uint16_t high, void (*h_cb)(struct fifo *, void **), uint16_t low, void (*l_cb)(struct fifo *, void **) ); |
| 0 | 2393 |
| 2394 /* | |
|
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2395 * FUNCTION: fd_fifo_post |
| 0 | 2396 * |
| 2397 * PARAMETERS: | |
|
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2398 * queue : The queue in which the element must be posted. |
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2399 * item : The element that is put in the queue. |
| 0 | 2400 * |
| 2401 * DESCRIPTION: | |
|
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2402 * An element is added in a queue. Elements are retrieved from the queue in FIFO order |
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2403 * with the fd_fifo_get, fd_fifo_tryget, or fd_fifo_timedget functions. |
| 0 | 2404 * |
| 2405 * RETURN VALUE: | |
|
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2406 * 0 : The element is queued. |
| 0 | 2407 * EINVAL : A parameter is invalid. |
| 2408 * ENOMEM : Not enough memory to complete the operation. | |
| 2409 */ | |
|
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2410 int fd_fifo_post_int ( struct fifo * queue, void ** item ); |
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2411 #define fd_fifo_post(queue, item) \ |
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2412 fd_fifo_post_int((queue), (void *)(item)) |
| 0 | 2413 |
| 2414 /* | |
|
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2415 * FUNCTION: fd_fifo_get |
| 0 | 2416 * |
| 2417 * PARAMETERS: | |
|
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2418 * queue : The queue from which the first element must be retrieved. |
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2419 * item : On return, the first element of the queue is stored here. |
| 0 | 2420 * |
| 2421 * DESCRIPTION: | |
|
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2422 * This function retrieves the first element from a queue. If the queue is empty, the function will block the |
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2423 * thread until a new element is posted to the queue, or until the thread is canceled (in which case the |
| 0 | 2424 * function does not return). |
| 2425 * | |
| 2426 * RETURN VALUE: | |
|
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2427 * 0 : A new element has been retrieved. |
| 0 | 2428 * EINVAL : A parameter is invalid. |
| 2429 */ | |
|
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2430 int fd_fifo_get_int ( struct fifo * queue, void ** item ); |
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2431 #define fd_fifo_get(queue, item) \ |
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2432 fd_fifo_get_int((queue), (void *)(item)) |
| 0 | 2433 |
| 2434 /* | |
|
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2435 * FUNCTION: fd_fifo_tryget |
| 0 | 2436 * |
| 2437 * PARAMETERS: | |
|
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2438 * queue : The queue from which the element must be retrieved. |
| 0 | 2439 * msg : On return, the message is stored here. |
| 2440 * | |
| 2441 * DESCRIPTION: | |
|
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2442 * This function is similar to fd_fifo_get, except that it will not block if |
| 0 | 2443 * the queue is empty, but return EWOULDBLOCK instead. |
| 2444 * | |
| 2445 * RETURN VALUE: | |
|
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2446 * 0 : A new element has been retrieved. |
| 0 | 2447 * EINVAL : A parameter is invalid. |
| 2448 * EWOULDBLOCK : The queue was empty. | |
| 2449 */ | |
|
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2450 int fd_fifo_tryget_int ( struct fifo * queue, void ** item ); |
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2451 #define fd_fifo_tryget(queue, item) \ |
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2452 fd_fifo_tryget_int((queue), (void *)(item)) |
| 0 | 2453 |
| 2454 /* | |
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2455 * FUNCTION: fd_fifo_timedget |
| 0 | 2456 * |
| 2457 * PARAMETERS: | |
|
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2458 * queue : The queue from which the element must be retrieved. |
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2459 * item : On return, the element is stored here. |
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2460 * abstime : the absolute time until which we allow waiting for an item. |
| 0 | 2461 * |
| 2462 * DESCRIPTION: | |
|
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2463 * This function is similar to fd_fifo_get, except that it will block if the queue is empty |
| 0 | 2464 * only until the absolute time abstime (see pthread_cond_timedwait for + info). |
| 2465 * If the queue is still empty when the time expires, the function returns ETIMEDOUT | |
| 2466 * | |
| 2467 * RETURN VALUE: | |
|
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2468 * 0 : A new item has been retrieved. |
| 0 | 2469 * EINVAL : A parameter is invalid. |
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2470 * ETIMEDOUT : The time out has passed and no item has been received. |
| 0 | 2471 */ |
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2472 int fd_fifo_timedget_int ( struct fifo * queue, void ** item, const struct timespec *abstime ); |
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2473 #define fd_fifo_timedget(queue, item, abstime) \ |
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2474 fd_fifo_timedget_int((queue), (void *)(item), (abstime)) |
| 0 | 2475 |
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2476 /* Dump a fifo list and optionally its inner elements -- beware of deadlocks! */ |
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2477 void fd_fifo_dump(int level, char * name, struct fifo * queue, void (*dump_item)(int level, void * item)); |
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2478 |
| 0 | 2479 #endif /* _LIBFREEDIAMETER_H */ |