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annotate freeDiameter/p_psm.c @ 14:14cf6daf716d

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Some progress on peers module
author Sebastien Decugis <sdecugis@nict.go.jp>
date Thu, 01 Oct 2009 18:24:07 +0900
parents ef9ef3bf4752
children 013ce9851131
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1 /*********************************************************************************************************
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2 * Software License Agreement (BSD License) *
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3 * Author: Sebastien Decugis <sdecugis@nict.go.jp> *
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4 * *
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5 * Copyright (c) 2009, WIDE Project and NICT *
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6 * All rights reserved. *
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7 * *
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8 * Redistribution and use of this software in source and binary forms, with or without modification, are *
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9 * permitted provided that the following conditions are met: *
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10 * *
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11 * * Redistributions of source code must retain the above *
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12 * copyright notice, this list of conditions and the *
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13 * following disclaimer. *
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14 * *
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15 * * Redistributions in binary form must reproduce the above *
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16 * copyright notice, this list of conditions and the *
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17 * following disclaimer in the documentation and/or other *
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18 * materials provided with the distribution. *
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19 * *
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20 * * Neither the name of the WIDE Project or NICT nor the *
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21 * names of its contributors may be used to endorse or *
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22 * promote products derived from this software without *
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23 * specific prior written permission of WIDE Project and *
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24 * NICT. *
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25 * *
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26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
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27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
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29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
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30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
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32 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
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33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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34 *********************************************************************************************************/
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35
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36 #include "fD.h"
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37
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38 const char *peer_state_str[] = {
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39 "STATE_ZOMBIE"
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40 , "STATE_OPEN"
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41 , "STATE_CLOSED"
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42 , "STATE_CLOSING"
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43 , "STATE_WAITCNXACK"
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44 , "STATE_WAITCNXACK_ELEC"
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45 , "STATE_WAITCEA"
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46 , "STATE_SUSPECT"
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47 , "STATE_REOPEN"
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48 };
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49
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50 const char * fd_pev_str(int event)
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51 {
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52 switch (event) {
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53 #define case_str( _val )\
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54 case _val : return #_val
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55 case_str(FDEVP_TERMINATE);
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56 case_str(FDEVP_DUMP_ALL);
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57 case_str(FDEVP_MSG_INCOMING);
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58 case_str(FDEVP_PSM_TIMEOUT);
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59
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60 default:
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61 TRACE_DEBUG(FULL, "Unknown event : %d", event);
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62 return "Unknown event";
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63 }
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64 }
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65
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66
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67 static int started = 0;
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68 static pthread_mutex_t started_mtx = PTHREAD_MUTEX_INITIALIZER;
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69 static pthread_cond_t started_cnd = PTHREAD_COND_INITIALIZER;
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70
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71 /* Wait for start signal */
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72 static int fd_psm_waitstart()
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73 {
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74 TRACE_ENTRY("");
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75 CHECK_POSIX( pthread_mutex_lock(&started_mtx) );
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76 awake:
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77 if (! started) {
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78 pthread_cleanup_push( fd_cleanup_mutex, &started_mtx );
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79 CHECK_POSIX( pthread_cond_wait(&started_cnd, &started_mtx) );
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80 pthread_cleanup_pop( 0 );
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81 goto awake;
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82 }
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83 CHECK_POSIX( pthread_mutex_unlock(&started_mtx) );
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84 return 0;
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85 }
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86
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87 /* Cancelation cleanup : set ZOMBIE state in the peer */
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88 void cleanup_state(void * arg)
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89 {
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90 struct fd_peer * peer = (struct fd_peer *)arg;
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91 CHECK_PARAMS_DO( CHECK_PEER(peer), return );
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92 peer->p_hdr.info.pi_state = STATE_ZOMBIE;
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93 return;
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94 }
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95
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96 /* Set timeout timer of next event */
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97 static void psm_next_timeout(struct fd_peer * peer, int add_random, int delay)
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98 {
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99 /* Initialize the timer */
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100 CHECK_POSIX_DO( clock_gettime( CLOCK_REALTIME, &peer->p_psm_timer ), ASSERT(0) );
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101
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102 if (add_random) {
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103 if (delay > 2)
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104 delay -= 2;
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105 else
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106 delay = 0;
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107
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108 /* Add a random value between 0 and 4sec */
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109 peer->p_psm_timer.tv_sec += random() % 4;
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110 peer->p_psm_timer.tv_nsec+= random() % 1000000000L;
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111 if (peer->p_psm_timer.tv_nsec > 1000000000L) {
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112 peer->p_psm_timer.tv_nsec -= 1000000000L;
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113 peer->p_psm_timer.tv_sec ++;
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114 }
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115 }
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116
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117 peer->p_psm_timer.tv_sec += delay;
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118
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119 #if 0
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120 /* temporary for debug */
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121 peer->p_psm_timer.tv_sec += 10;
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122 #endif
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123 }
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124
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125 static int psm_ev_timedget(struct fd_peer * peer, int *code, void ** data)
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126 {
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127 struct fd_event * ev;
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128 int ret = 0;
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129
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130 TRACE_ENTRY("%p %p %p", peer, code, data);
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131
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132 ret = fd_fifo_timedget(peer->p_events, &ev, &peer->p_psm_timer);
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133 if (ret == ETIMEDOUT) {
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134 *code = FDEVP_PSM_TIMEOUT;
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135 *data = NULL;
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136 } else {
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137 CHECK_FCT( ret );
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138 *code = ev->code;
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139 *data = ev->data;
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140 free(ev);
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141 }
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142
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143 return 0;
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144 }
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145
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146 /* The state machine thread */
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147 static void * p_psm_th( void * arg )
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148 {
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149 struct fd_peer * peer = (struct fd_peer *)arg;
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150 int created_started = started;
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151
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152 CHECK_PARAMS_DO( CHECK_PEER(peer), ASSERT(0) );
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153
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154 pthread_cleanup_push( cleanup_state, arg );
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155
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156 /* Set the thread name */
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157 {
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158 char buf[48];
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159 sprintf(buf, "PSM/%.*s", sizeof(buf) - 5, peer->p_hdr.info.pi_diamid);
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160 fd_log_threadname ( buf );
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161 }
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162
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163 /* Wait that the PSM are authorized to start in the daemon */
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164 CHECK_FCT_DO( fd_psm_waitstart(), goto end );
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165
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166 /* The state machine starts in CLOSED state */
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167 peer->p_hdr.info.pi_state = STATE_CLOSED;
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168
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169 /* Initialize the timer */
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170 if (peer->p_flags.pf_responder) {
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171 psm_next_timeout(peer, 0, INCNX_TIMEOUT);
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172 } else {
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173 psm_next_timeout(peer, created_started ? 0 : 1, 0);
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174 }
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175
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176 psm:
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177 do {
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178 int event;
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179 void * ev_data;
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180
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181 /* Get next event */
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182 CHECK_FCT_DO( psm_ev_timedget(peer, &event, &ev_data), goto end );
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183 TRACE_DEBUG(FULL, "'%s'\t<-- '%s'\t(%p)\t'%s'",
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184 STATE_STR(peer->p_hdr.info.pi_state),
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185 fd_pev_str(event), ev_data,
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186 peer->p_hdr.info.pi_diamid);
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187
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188 /* Now, the action depends on the current state and the incoming event */
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189
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190
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191 } while (1);
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192
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193
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194 end:
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195 /* set STATE_ZOMBIE */
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196 pthread_cleanup_pop(1);
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197 return NULL;
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198 }
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199
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200
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201
13
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202
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203 /* Create the PSM thread of one peer structure */
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204 int fd_psm_begin(struct fd_peer * peer )
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205 {
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206 TRACE_ENTRY("%p", peer);
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207 TODO("");
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208 return ENOTSUP;
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209 }
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210
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211 /* End the PSM (clean ending) */
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212 int fd_psm_terminate(struct fd_peer * peer )
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213 {
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214 TRACE_ENTRY("%p", peer);
14
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215 CHECK_PARAMS( CHECK_PEER(peer) );
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216 CHECK_FCT( fd_event_send(peer->p_events, FDEVP_TERMINATE, NULL) );
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217 return 0;
13
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218 }
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219
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220 /* End the PSM violently */
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221 void fd_psm_abord(struct fd_peer * peer )
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222 {
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223 TRACE_ENTRY("%p", peer);
14
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224 TODO("Cancel PSM thread");
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225 TODO("Cancel IN thread");
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226 TODO("Cancel OUT thread");
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227 TODO("Cleanup the connection");
13
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228 return;
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229 }
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230
14
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231 /* Allow the state machines to start */
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232 int fd_psm_start()
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233 {
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234 TRACE_ENTRY("");
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235 CHECK_POSIX( pthread_mutex_lock(&started_mtx) );
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236 started = 1;
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237 CHECK_POSIX( pthread_cond_broadcast(&started_cnd) );
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238 CHECK_POSIX( pthread_mutex_unlock(&started_mtx) );
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239 return 0;
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240 }
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241
"Welcome to our mercurial repository"