Mercurial > hg > freeDiameter
annotate libfdcore/server.c @ 931:155d45d06530 1.1.6
Updated copyright information
author | Sebastien Decugis <sdecugis@freediameter.net> |
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date | Sun, 03 Mar 2013 09:15:36 +0100 |
parents | 5053f1abcf5d |
children | 2091bf698fb1 |
rev | line source |
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1 /********************************************************************************************************* |
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2 * Software License Agreement (BSD License) * |
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3 * Author: Sebastien Decugis <sdecugis@freediameter.net> * |
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4 * * |
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5 * Copyright (c) 2013, 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 "fdcore-internal.h" |
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37 |
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38 /* Server (listening) part of the framework */ |
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39 |
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40 static struct fd_list FD_SERVERS = FD_LIST_INITIALIZER(FD_SERVERS); /* The list of all server objects */ |
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41 /* We don't need to protect this list, it is only accessed from the main framework thread. */ |
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42 |
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43 enum s_state { |
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44 NOT_CREATED=0, |
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45 RUNNING, |
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46 TERMINATED, |
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47 ERROR /* an error occurred, this is not a valid status */ |
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48 }; |
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49 |
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50 /* Servers information */ |
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51 struct server { |
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52 struct fd_list chain; /* link in the FD_SERVERS list */ |
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53 |
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54 struct cnxctx * conn; /* server connection context (listening socket) */ |
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55 int proto; /* IPPROTO_TCP or IPPROTO_SCTP */ |
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56 int secur; /* TLS is started immediatly after connection ? */ |
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57 |
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58 pthread_t thr; /* The thread listening for new connections */ |
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59 enum s_state state; /* state of the thread */ |
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60 |
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61 struct fd_list clients; /* List of clients connected to this server, not yet identified */ |
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62 pthread_mutex_t clients_mtx; /* Mutex to protect the list of clients */ |
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63 }; |
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64 |
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65 |
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66 /* Client information (connecting peer for which we don't have the CER yet) */ |
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67 struct client { |
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68 struct fd_list chain; /* link in the server's list of clients */ |
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69 struct cnxctx *conn; /* Parameters of the connection */ |
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70 struct timespec ts; /* Deadline for receiving CER (after INCNX_TIMEOUT) */ |
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71 pthread_t thr; /* connection state machine */ |
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72 }; |
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73 |
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74 |
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75 |
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76 /* Micro functions to read/change the status thread-safely */ |
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77 static pthread_mutex_t s_lock = PTHREAD_MUTEX_INITIALIZER; |
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78 static enum s_state get_status(struct server * s) |
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79 { |
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80 enum s_state r; |
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81 CHECK_POSIX_DO( pthread_mutex_lock(&s_lock), return ERROR ); |
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82 r = s->state; |
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83 CHECK_POSIX_DO( pthread_mutex_unlock(&s_lock), return ERROR ); |
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84 return r; |
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85 } |
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86 static void set_status(struct server * s, enum s_state st) |
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87 { |
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88 CHECK_POSIX_DO( pthread_mutex_lock(&s_lock), return ); |
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89 s->state = st; |
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90 CHECK_POSIX_DO( pthread_mutex_unlock(&s_lock), return ); |
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91 } |
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92 |
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93 |
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94 |
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95 /* Dump all servers information */ |
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96 void fd_servers_dump() |
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97 { |
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98 struct fd_list * li, *cli; |
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99 |
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100 fd_log_debug("Dumping servers list :\n"); |
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101 for (li = FD_SERVERS.next; li != &FD_SERVERS; li = li->next) { |
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102 struct server * s = (struct server *)li; |
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103 enum s_state st = get_status(s); |
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104 fd_log_debug(" Serv %p '%s': %s, %s, %s\n", |
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105 s, fd_cnx_getid(s->conn), |
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106 IPPROTO_NAME( s->proto ), |
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107 s->secur ? "Secur" : "NotSecur", |
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108 (st == NOT_CREATED) ? "Thread not created" : |
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109 ((st == RUNNING) ? "Thread running" : |
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110 ((st == TERMINATED) ? "Thread terminated" : |
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111 "Thread status unknown"))); |
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112 /* Dump the client list of this server */ |
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113 CHECK_POSIX_DO( pthread_mutex_lock(&s->clients_mtx), ); |
22
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114 for (cli = s->clients.next; cli != &s->clients; cli = cli->next) { |
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115 struct client * c = (struct client *)cli; |
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116 char bufts[128]; |
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117 fd_log_debug(" Connected: '%s' (timeout: %s)\n", |
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118 fd_cnx_getid(c->conn), |
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119 fd_log_time(&c->ts, bufts, sizeof(bufts))); |
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120 } |
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121 CHECK_POSIX_DO( pthread_mutex_unlock(&s->clients_mtx), ); |
22
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122 } |
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123 } |
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124 |
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125 |
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126 /* The state machine to handle incoming connection before the remote peer is identified */ |
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127 static void * client_sm(void * arg) |
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128 { |
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129 struct client * c = arg; |
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130 struct server * s = NULL; |
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131 uint8_t * buf = NULL; |
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132 size_t bufsz; |
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133 struct msg * msg = NULL; |
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134 struct msg_hdr *hdr = NULL; |
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135 |
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136 TRACE_ENTRY("%p", c); |
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137 |
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138 CHECK_PARAMS_DO(c && c->conn && c->chain.head, goto fatal_error ); |
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139 |
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140 s = c->chain.head->o; |
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141 |
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142 /* Name the current thread */ |
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143 fd_log_threadname ( fd_cnx_getid(c->conn) ); |
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144 |
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145 /* Handshake if we are a secure server port, or start clear otherwise */ |
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146 if (s->secur) { |
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147 int ret = fd_cnx_handshake(c->conn, GNUTLS_SERVER, NULL, NULL); |
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148 if (ret != 0) { |
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149 if (TRACE_BOOL(INFO)) { |
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150 fd_log_debug("TLS handshake failed for client '%s', connection aborted.\n", fd_cnx_getid(c->conn)); |
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151 } |
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152 goto cleanup; |
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153 } |
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154 } else { |
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155 CHECK_FCT_DO( fd_cnx_start_clear(c->conn, 0), goto cleanup ); |
21
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156 } |
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157 |
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158 /* Set the timeout to receive the first message */ |
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159 CHECK_SYS_DO( clock_gettime(CLOCK_REALTIME, &c->ts), goto fatal_error ); |
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160 c->ts.tv_sec += INCNX_TIMEOUT; |
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161 |
26
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162 /* Receive the first Diameter message on the connection -- cleanup in case of timeout */ |
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163 CHECK_FCT_DO( fd_cnx_receive(c->conn, &c->ts, &buf, &bufsz), goto cleanup ); |
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164 |
27
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165 TRACE_DEBUG(FULL, "Received %zdb from new client '%s'", bufsz, fd_cnx_getid(c->conn)); |
26
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166 |
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167 /* Try parsing this message */ |
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168 CHECK_FCT_DO( fd_msg_parse_buffer( &buf, bufsz, &msg ), /* Parsing failed */ goto cleanup ); |
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169 |
901
a3eed6420b5b
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170 /* Log incoming message */ |
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171 fd_msg_log( FD_MSG_LOG_RECEIVED, msg, "Received %zdb from new client '%s'", bufsz, fd_cnx_getid(c->conn) ); |
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172 |
28
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173 /* We expect a CER, it must parse with our dictionary and rules */ |
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174 CHECK_FCT_DO( fd_msg_parse_rules( msg, fd_g_config->cnf_dict, NULL ), /* Parsing failed -- trace details ? */ goto cleanup ); |
21
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175 |
26
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176 /* Now check we received a CER */ |
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177 CHECK_FCT_DO( fd_msg_hdr ( msg, &hdr ), goto fatal_error ); |
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178 CHECK_PARAMS_DO( (hdr->msg_appl == 0) && (hdr->msg_flags & CMD_FLAG_REQUEST) && (hdr->msg_code == CC_CAPABILITIES_EXCHANGE), |
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179 { fd_log_debug("Connection '%s', expecting CER, received something else, closing...\n", fd_cnx_getid(c->conn)); goto cleanup; } ); |
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180 |
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181 /* Finally, pass the information to the peers module which will handle it next */ |
29
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182 pthread_cleanup_push((void *)fd_cnx_destroy, c->conn); |
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183 pthread_cleanup_push((void *)fd_msg_free, msg); |
691
78b665400097
Cleanup all pthread_cleanup_push / pop pairs so that pop is always called after push, or ASSERT(0) is some grave errors
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184 CHECK_FCT_DO( fd_peer_handle_newCER( &msg, &c->conn ), ); |
29
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185 pthread_cleanup_pop(0); |
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186 pthread_cleanup_pop(0); |
26
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187 |
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188 /* The end, we cleanup the client structure */ |
22
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189 cleanup: |
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190 /* Unlink the client structure */ |
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191 CHECK_POSIX_DO( pthread_mutex_lock(&s->clients_mtx), goto fatal_error ); |
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192 fd_list_unlink( &c->chain ); |
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193 CHECK_POSIX_DO( pthread_mutex_unlock(&s->clients_mtx), goto fatal_error ); |
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194 |
688
8c3dc8584dab
Prepared capability for messages logging to separate files / folders
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195 /* Cleanup the parsed message if any */ |
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196 if (msg) { |
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197 fd_msg_log( FD_MSG_LOG_DROPPED, msg, "Received invalid/unexpected message from connecting client '%s'", fd_cnx_getid(c->conn) ); |
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198 CHECK_FCT_DO( fd_msg_free(msg), /* continue */); |
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199 } |
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200 |
22
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201 /* Destroy the connection object if present */ |
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202 if (c->conn) |
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203 fd_cnx_destroy(c->conn); |
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204 |
26
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205 /* Cleanup the received buffer if any */ |
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206 free(buf); |
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207 |
22
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208 /* Detach the thread, cleanup the client structure */ |
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209 pthread_detach(pthread_self()); |
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210 free(c); |
21
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211 return NULL; |
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212 |
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213 fatal_error: /* This has effect to terminate the daemon */ |
25
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214 CHECK_FCT_DO(fd_event_send(fd_g_config->cnf_main_ev, FDEV_TERMINATE, 0, NULL), ); |
21
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215 return NULL; |
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216 } |
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217 |
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218 /* The thread managing a server */ |
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219 static void * serv_th(void * arg) |
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220 { |
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221 struct server *s = (struct server *)arg; |
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222 |
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223 CHECK_PARAMS_DO(s, goto error); |
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224 fd_log_threadname ( fd_cnx_getid(s->conn) ); |
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225 set_status(s, RUNNING); |
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226 |
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227 /* Accept incoming connections */ |
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228 CHECK_FCT_DO( fd_cnx_serv_listen(s->conn), goto error ); |
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229 |
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230 do { |
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231 struct client * c = NULL; |
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232 struct cnxctx * conn = NULL; |
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233 |
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234 /* Wait for a new client */ |
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235 CHECK_MALLOC_DO( conn = fd_cnx_serv_accept(s->conn), goto error ); |
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236 |
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237 TRACE_DEBUG(FULL, "New connection accepted"); |
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238 |
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239 /* Create a client structure */ |
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240 CHECK_MALLOC_DO( c = malloc(sizeof(struct client)), goto error ); |
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241 memset(c, 0, sizeof(struct client)); |
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242 fd_list_init(&c->chain, c); |
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243 c->conn = conn; |
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244 |
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245 /* Save the client in the list */ |
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246 CHECK_POSIX_DO( pthread_mutex_lock( &s->clients_mtx ), goto error ); |
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247 fd_list_insert_before(&s->clients, &c->chain); |
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248 CHECK_POSIX_DO( pthread_mutex_unlock( &s->clients_mtx ), goto error ); |
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249 |
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250 /* Start the client thread */ |
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251 CHECK_POSIX_DO( pthread_create( &c->thr, NULL, client_sm, c ), goto error ); |
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252 |
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253 } while (1); |
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254 |
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255 error: |
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256 if (s) |
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257 set_status(s, TERMINATED); |
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258 /* Send error signal to the daemon */ |
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259 TRACE_DEBUG(INFO, "An error occurred in server module! Thread is terminating..."); |
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260 CHECK_FCT_DO(fd_event_send(fd_g_config->cnf_main_ev, FDEV_TERMINATE, 0, NULL), ); |
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261 |
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262 return NULL; |
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263 } |
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264 |
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265 |
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266 /* Create a new server structure */ |
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267 static struct server * new_serv( int proto, int secur ) |
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268 { |
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269 struct server * new; |
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270 |
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271 /* New server structure */ |
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272 CHECK_MALLOC_DO( new = malloc(sizeof(struct server)), return NULL ); |
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273 |
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274 memset(new, 0, sizeof(struct server)); |
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275 fd_list_init(&new->chain, new); |
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276 new->proto = proto; |
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277 new->secur = secur; |
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278 CHECK_POSIX_DO( pthread_mutex_init(&new->clients_mtx, NULL), return NULL ); |
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279 fd_list_init(&new->clients, new); |
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280 |
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281 return new; |
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282 } |
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283 |
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284 /* Start all the servers */ |
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285 int fd_servers_start() |
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286 { |
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287 struct server * s; |
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288 |
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289 int empty_conf_ep = FD_IS_LIST_EMPTY(&fd_g_config->cnf_endpoints); |
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290 |
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291 /* SCTP */ |
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292 if (!fd_g_config->cnf_flags.no_sctp) { |
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293 #ifdef DISABLE_SCTP |
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294 ASSERT(0); |
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295 #else /* DISABLE_SCTP */ |
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296 |
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da93c7a5e1d0
Fix SCTP port when ListenOn is set (Patch by Vlada) - closes #20
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297 /* Create the server on unsecure port */ |
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298 if (fd_g_config->cnf_port) { |
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299 CHECK_MALLOC( s = new_serv(IPPROTO_SCTP, 0) ); |
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300 CHECK_MALLOC( s->conn = fd_cnx_serv_sctp(fd_g_config->cnf_port, empty_conf_ep ? NULL : &fd_g_config->cnf_endpoints) ); |
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301 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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302 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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303 } |
22
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304 |
21
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305 /* Create the server on secure port */ |
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306 if (fd_g_config->cnf_port_tls) { |
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307 CHECK_MALLOC( s = new_serv(IPPROTO_SCTP, 1) ); |
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308 CHECK_MALLOC( s->conn = fd_cnx_serv_sctp(fd_g_config->cnf_port_tls, empty_conf_ep ? NULL : &fd_g_config->cnf_endpoints) ); |
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309 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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310 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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311 } |
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312 |
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313 #endif /* DISABLE_SCTP */ |
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314 } |
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315 |
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316 /* TCP */ |
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317 if (!fd_g_config->cnf_flags.no_tcp) { |
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318 |
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319 if (empty_conf_ep) { |
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320 /* Bind TCP servers on [0.0.0.0] */ |
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321 if (!fd_g_config->cnf_flags.no_ip4) { |
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322 |
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323 if (fd_g_config->cnf_port) { |
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324 CHECK_MALLOC( s = new_serv(IPPROTO_TCP, 0) ); |
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325 CHECK_MALLOC( s->conn = fd_cnx_serv_tcp(fd_g_config->cnf_port, AF_INET, NULL) ); |
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326 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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327 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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328 } |
22
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329 |
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330 if (fd_g_config->cnf_port_tls) { |
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331 CHECK_MALLOC( s = new_serv(IPPROTO_TCP, 1) ); |
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332 CHECK_MALLOC( s->conn = fd_cnx_serv_tcp(fd_g_config->cnf_port_tls, AF_INET, NULL) ); |
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333 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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334 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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335 } |
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336 } |
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337 |
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338 /* Bind TCP servers on [::] */ |
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339 if (!fd_g_config->cnf_flags.no_ip6) { |
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340 |
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341 if (fd_g_config->cnf_port) { |
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342 CHECK_MALLOC( s = new_serv(IPPROTO_TCP, 0) ); |
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343 CHECK_MALLOC( s->conn = fd_cnx_serv_tcp(fd_g_config->cnf_port, AF_INET6, NULL) ); |
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344 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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345 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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346 } |
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347 |
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348 if (fd_g_config->cnf_port_tls) { |
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349 CHECK_MALLOC( s = new_serv(IPPROTO_TCP, 1) ); |
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350 CHECK_MALLOC( s->conn = fd_cnx_serv_tcp(fd_g_config->cnf_port_tls, AF_INET6, NULL) ); |
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351 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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352 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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353 } |
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354 } |
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355 } else { |
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356 /* Create all endpoints -- check flags */ |
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357 struct fd_list * li; |
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358 for (li = fd_g_config->cnf_endpoints.next; li != &fd_g_config->cnf_endpoints; li = li->next) { |
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359 struct fd_endpoint * ep = (struct fd_endpoint *)li; |
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360 sSA * sa = (sSA *) &ep->ss; |
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361 if (! (ep->flags & EP_FL_CONF)) |
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362 continue; |
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363 if (fd_g_config->cnf_flags.no_ip4 && (sa->sa_family == AF_INET)) |
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364 continue; |
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365 if (fd_g_config->cnf_flags.no_ip6 && (sa->sa_family == AF_INET6)) |
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366 continue; |
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367 |
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368 if (fd_g_config->cnf_port) { |
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369 CHECK_MALLOC( s = new_serv(IPPROTO_TCP, 0) ); |
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370 CHECK_MALLOC( s->conn = fd_cnx_serv_tcp(fd_g_config->cnf_port, sa->sa_family, ep) ); |
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371 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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372 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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373 } |
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374 |
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375 if (fd_g_config->cnf_port_tls) { |
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376 CHECK_MALLOC( s = new_serv(IPPROTO_TCP, 1) ); |
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377 CHECK_MALLOC( s->conn = fd_cnx_serv_tcp(fd_g_config->cnf_port_tls, sa->sa_family, ep) ); |
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378 fd_list_insert_before( &FD_SERVERS, &s->chain ); |
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379 CHECK_POSIX( pthread_create( &s->thr, NULL, serv_th, s ) ); |
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380 } |
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381 } |
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382 } |
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383 } |
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384 |
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385 /* Now, if we had an empty list of local adresses (no address configured), try to read the real addresses from the kernel */ |
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386 if (empty_conf_ep) { |
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387 CHECK_FCT(fd_cnx_get_local_eps(&fd_g_config->cnf_endpoints)); |
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388 if (FD_IS_LIST_EMPTY(&fd_g_config->cnf_endpoints)) { |
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389 TRACE_DEBUG(INFO, "Unable to find the address(es) of the local system.\n" |
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390 "Please use \"ListenOn\" parameter in the configuration.\n" |
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391 "This information is required to generate the CER/CEA messages.\n"); |
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392 return EINVAL; |
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393 } |
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394 } |
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395 if (TRACE_BOOL(FULL)){ |
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396 fd_log_debug(" Local server address(es) :\n"); |
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397 fd_ep_dump( 5, &fd_g_config->cnf_endpoints ); |
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398 } |
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399 return 0; |
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400 } |
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401 |
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402 /* Terminate all the servers */ |
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403 int fd_servers_stop() |
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404 { |
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405 TRACE_ENTRY(""); |
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406 |
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407 TRACE_DEBUG(INFO, "Shutting down server sockets..."); |
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408 |
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409 /* Loop on all servers */ |
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410 while (!FD_IS_LIST_EMPTY(&FD_SERVERS)) { |
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411 struct server * s = (struct server *)(FD_SERVERS.next); |
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412 |
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413 /* Lock client list now */ |
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414 CHECK_FCT_DO( pthread_mutex_lock(&s->clients_mtx), /* continue anyway */); |
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415 |
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416 /* cancel thread */ |
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417 CHECK_FCT_DO( fd_thr_term(&s->thr), /* continue */); |
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418 |
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419 /* destroy server connection context */ |
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420 fd_cnx_destroy(s->conn); |
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421 |
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422 /* cancel and destroy all clients */ |
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423 while (!FD_IS_LIST_EMPTY(&s->clients)) { |
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424 struct client * c = (struct client *)(s->clients.next); |
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425 |
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426 /* Destroy client's thread */ |
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427 CHECK_FCT_DO( fd_thr_term(&c->thr), /* continue */); |
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428 |
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429 /* Destroy client's connection */ |
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430 fd_cnx_destroy(c->conn); |
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431 |
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432 /* Unlink and free the client */ |
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433 fd_list_unlink(&c->chain); |
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434 free(c); |
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435 } |
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436 /* Unlock & destroy */ |
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437 CHECK_FCT_DO( pthread_mutex_unlock(&s->clients_mtx), /* continue anyway */); |
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438 CHECK_FCT_DO( pthread_mutex_destroy(&s->clients_mtx), /* continue */); |
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439 |
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440 /* Now destroy the server object */ |
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441 fd_list_unlink(&s->chain); |
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442 free(s); |
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443 } |
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444 |
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445 /* We're done! */ |
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446 return 0; |
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447 } |