Mercurial > hg > freeDiameter
annotate extensions/rt_redirect/redir_entries.c @ 1259:82280e745a89
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author | Thomas Klausner <tk@giga.or.at> |
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date | Mon, 24 Mar 2014 13:13:38 +0100 |
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children | 4f6f61e67599 |
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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) 2011, 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 "rt_redir.h" |
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37 |
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38 /* The array with all entries ordered by their data */ |
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39 struct redir_line redirects_usages[H_U_MAX + 1]; |
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40 |
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41 /* Initialize the array */ |
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42 int redir_entry_init() |
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43 { |
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44 int i; |
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45 |
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46 TRACE_ENTRY(""); |
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47 |
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48 /* redirects_usages */ |
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49 memset(&redirects_usages, 0, sizeof(redirects_usages)); |
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50 |
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51 for (i = 0; i <= H_U_MAX; i++) { |
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52 CHECK_POSIX( pthread_rwlock_init( &redirects_usages[i].lock, NULL) ); |
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53 fd_list_init( &redirects_usages[i].sentinel, &redirects_usages[i] ); |
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54 } |
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55 |
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56 /* initialize the scores */ |
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57 redirects_usages[ DONT_CACHE ].score = FD_SCORE_REDIR_ONCE; |
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58 redirects_usages[ ALL_SESSION ].score = FD_SCORE_REDIR_SESSION; |
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59 redirects_usages[ ALL_REALM ].score = FD_SCORE_REDIR_REALM; |
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60 redirects_usages[ REALM_AND_APPLICATION ].score = FD_SCORE_REDIR_REALM_APP; |
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61 redirects_usages[ ALL_APPLICATION ].score = FD_SCORE_REDIR_APP; |
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62 redirects_usages[ ALL_HOST ].score = FD_SCORE_REDIR_HOST; |
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63 redirects_usages[ ALL_USER ].score = FD_SCORE_REDIR_USER; |
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64 |
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65 return 0; |
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66 } |
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67 |
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68 |
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69 /* Create a new redir_entry and add the correct data */ |
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70 int redir_entry_new(struct redir_entry ** e, struct fd_list * targets, uint32_t rhu, struct msg * qry, DiamId_t nh, size_t nhlen, os0_t oh, size_t ohlen) |
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71 { |
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72 struct redir_entry * entry = NULL; |
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73 os0_t s; |
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74 size_t l; |
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75 |
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76 TRACE_ENTRY("%p %p %d %p %p %zd %p %zd", e, targets, rhu, qry, nh, nhlen, oh, ohlen) |
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77 ASSERT(e && targets && (rhu <= H_U_MAX) && qry && nh && nhlen && oh && ohlen); |
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78 |
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79 CHECK_MALLOC( entry = malloc(sizeof(struct redir_entry)) ); |
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80 memset(entry, 0, sizeof(struct redir_entry)); |
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81 |
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82 entry->eyec = REDIR_ENTRY_EYEC; |
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83 |
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84 CHECK_MALLOC( entry->from.s = os0dup(nh, nhlen) ); |
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85 entry->from.l = nhlen; |
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86 |
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87 fd_list_init(&entry->target_peers_list, entry); |
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88 fd_list_move_end(&entry->target_peers_list, targets); |
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89 |
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90 fd_list_init(&entry->exp_list, entry); |
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91 |
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92 entry->type = rhu; |
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93 fd_list_init(&entry->redir_list, entry); |
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94 /* finally initialize the data */ |
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95 switch (rhu) { |
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96 case DONT_CACHE: |
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97 entry->data.message.msg = qry; |
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99 |
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100 case ALL_SESSION: |
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101 { |
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102 /* There is a good chance that the session is already cached in the message, so retrieve it */ |
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103 struct session * sess; |
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104 CHECK_FCT( fd_msg_sess_get(fd_g_config->cnf_dict, qry, &sess, NULL) ); |
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105 if (!sess) { |
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106 TRACE_DEBUG(INFO, "Received a Redirect indication with usage ALL_SESSION but no Session-Id AVP in the message, defaulting to DONT_CACHE"); |
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107 entry->type = DONT_CACHE; |
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108 entry->data.message.msg = qry; |
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109 break; |
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110 } |
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111 CHECK_FCT( fd_sess_getsid(sess, &s, &l) ); |
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112 CHECK_MALLOC( entry->data.session.s = os0dup(s, l) ); |
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113 entry->data.session.l = l; |
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114 } |
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115 break; |
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116 |
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117 case ALL_REALM: |
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118 { |
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119 /* Search the Destination-Realm of the message */ |
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120 struct avp * dr; |
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121 struct avp_hdr * ahdr; |
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122 CHECK_FCT( fd_msg_search_avp(qry, redir_dict_dr, &dr) ); |
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123 if (!dr) { |
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124 TRACE_DEBUG(INFO, "Received a Redirect indication with usage ALL_REALM but no Destination-Realm AVP in the message, defaulting to DONT_CACHE"); |
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125 entry->type = DONT_CACHE; |
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126 entry->data.message.msg = qry; |
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127 break; |
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128 } |
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129 CHECK_FCT( fd_msg_avp_hdr( dr, &ahdr ) ); |
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130 CHECK_MALLOC( entry->data.realm.s = os0dup(ahdr->avp_value->os.data, ahdr->avp_value->os.len) ); |
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131 entry->data.realm.l = ahdr->avp_value->os.len; |
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132 } |
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133 break; |
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134 |
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135 case REALM_AND_APPLICATION: |
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136 { |
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137 /* Search the Destination-Realm of the message */ |
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138 struct avp * dr; |
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139 struct avp_hdr * ahdr; |
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140 CHECK_FCT( fd_msg_search_avp(qry, redir_dict_dr, &dr) ); |
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141 if (!dr) { |
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142 TRACE_DEBUG(INFO, "Received a Redirect indication with usage REALM_AND_APPLICATION but no Destination-Realm AVP in the message, defaulting to DONT_CACHE"); |
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143 entry->type = DONT_CACHE; |
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144 entry->data.message.msg = qry; |
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145 break; |
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146 } |
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147 CHECK_FCT( fd_msg_avp_hdr( dr, &ahdr ) ); |
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148 CHECK_MALLOC( entry->data.realm_app.s = os0dup(ahdr->avp_value->os.data, ahdr->avp_value->os.len) ); |
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149 entry->data.realm_app.l = ahdr->avp_value->os.len; |
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150 } |
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151 /* and then the application */ |
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152 { |
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153 struct msg_hdr * hdr; |
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154 CHECK_FCT( fd_msg_hdr(qry, &hdr) ); |
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155 entry->data.realm_app.a = hdr->msg_appl; |
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156 } |
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157 break; |
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158 |
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159 case ALL_APPLICATION: |
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160 { |
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161 struct msg_hdr * hdr; |
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162 CHECK_FCT( fd_msg_hdr(qry, &hdr) ); |
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163 entry->data.app.a = hdr->msg_appl; |
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164 } |
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165 break; |
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166 |
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167 case ALL_HOST: |
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168 CHECK_MALLOC( entry->data.host.s = os0dup(oh, ohlen) ); |
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169 entry->data.host.l = ohlen; |
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170 break; |
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171 |
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172 case ALL_USER: |
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173 { |
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174 /* Search the User-Name of the message */ |
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175 struct avp * un; |
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176 struct avp_hdr * ahdr; |
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177 CHECK_FCT( fd_msg_search_avp(qry, redir_dict_un, &un) ); |
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178 if (!un) { |
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179 TRACE_DEBUG(INFO, "Received a Redirect indication with usage ALL_USER but no User-Name AVP in the message, defaulting to DONT_CACHE"); |
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180 entry->type = DONT_CACHE; |
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181 entry->data.message.msg = qry; |
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182 break; |
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183 } |
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184 CHECK_FCT( fd_msg_avp_hdr( un, &ahdr ) ); |
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185 CHECK_MALLOC( entry->data.user.s = os0dup(ahdr->avp_value->os.data, ahdr->avp_value->os.len) ); |
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186 entry->data.user.l = ahdr->avp_value->os.len; |
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187 } |
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188 break; |
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189 |
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190 default: |
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191 ASSERT(0); |
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192 return EINVAL; |
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193 } |
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194 |
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195 /* We're done */ |
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196 *e = entry; |
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197 return 0; |
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198 } |
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199 |
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200 |
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201 /* Compares two pointers (DONT_CACHE) */ |
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202 static int compare_entries_ptr(union matchdata * d1, union matchdata * d2) { |
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203 unsigned long v1 = (unsigned long) d1->message.msg; |
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204 unsigned long v2 = (unsigned long) d2->message.msg; |
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205 if (v1 > v2) |
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206 return 1; |
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207 if (v1 < v2) |
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208 return -1; |
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209 return 0; |
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210 } |
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211 /* Compare two applications (REALM_AND_APPLICATION and ALL_APPLICATION) */ |
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212 static int compare_entries_appl(union matchdata * d1, union matchdata * d2) { |
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213 if (d1->app.a > d2->app.a) |
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214 return 1; |
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215 if (d1->app.a < d2->app.a) |
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216 return -1; |
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217 return 0; |
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218 } |
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219 |
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220 /* Compare two strings (ALL_SESSION, ALL_REALM, ALL_HOST, ALL_USER) */ |
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221 static int compare_entries_ostr(union matchdata * d1, union matchdata * d2) { |
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222 return fd_os_cmp(d1->session.s, d1->session.l, d2->session.s, d2->session.l); |
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223 } |
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224 |
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225 /* The array of callbacks */ |
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226 int (*redir_entry_cmp_key[H_U_MAX +1])(union matchdata * , union matchdata * ) = { |
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227 compare_entries_ptr, /* DONT_CACHE */ |
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228 compare_entries_ostr, /* ALL_SESSION */ |
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229 compare_entries_ostr, /* ALL_REALM */ |
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230 compare_entries_appl, /* REALM_AND_APPLICATION */ |
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231 compare_entries_appl, /* ALL_APPLICATION */ |
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232 compare_entries_ostr, /* ALL_HOST */ |
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233 compare_entries_ostr /* ALL_USER */ |
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234 }; |
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235 |
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236 /* Link the newly created entry into the correct redirects_usages list. The mutex must be held */ |
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237 int redir_entry_insert(struct redir_entry * e) |
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238 { |
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239 struct fd_list * li; |
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240 |
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241 TRACE_ENTRY("%p", e); |
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242 CHECK_PARAMS(e && (e->eyec == REDIR_ENTRY_EYEC)); |
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243 |
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244 /* Write-Lock the line */ |
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245 CHECK_POSIX( pthread_rwlock_wrlock( RWLOCK_REDIR(e) ) ); |
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246 |
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247 for (li = redirects_usages[e->type].sentinel.next; li != &redirects_usages[e->type].sentinel; li = li->next) { |
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248 struct redir_entry * n = li->o; |
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249 int cmp = redir_entry_cmp_key[e->type](&e->data, &n->data); |
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250 if (cmp <= 0) |
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251 break; |
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252 } |
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253 |
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254 fd_list_insert_before(li, &e->redir_list); |
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255 |
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256 /* unLock the line */ |
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257 CHECK_POSIX( pthread_rwlock_unlock( RWLOCK_REDIR(e) ) ); |
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258 |
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259 return 0; |
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260 } |
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261 |
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262 /* Destroy -- the exp_peer_lock must be held when this function is called */ |
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263 int redir_entry_destroy(struct redir_entry * e) |
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264 { |
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265 TRACE_ENTRY("%p", e); |
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266 CHECK_PARAMS(e && (e->eyec == REDIR_ENTRY_EYEC)); |
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267 |
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268 /* If the entry is linked, lock the rwlock also */ |
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269 if (!FD_IS_LIST_EMPTY(&e->redir_list)) { |
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270 CHECK_POSIX( pthread_rwlock_wrlock( RWLOCK_REDIR(e) ) ); |
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271 fd_list_unlink(&e->redir_list); |
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272 CHECK_POSIX( pthread_rwlock_unlock( RWLOCK_REDIR(e) ) ); |
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273 } |
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274 |
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275 /* Now unlink from other list */ |
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276 fd_list_unlink(&e->exp_list); |
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277 |
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278 /* Empty the targets list */ |
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279 while (!FD_IS_LIST_EMPTY(&e->target_peers_list)) { |
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280 struct redir_host * h = (struct redir_host *)e->target_peers_list.next->o; |
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281 |
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282 fd_list_unlink(&h->chain); |
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283 free(h->id); |
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284 free(h); |
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285 } |
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286 |
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287 /* Now we can destroy the data safely */ |
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288 switch (e->type) { |
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289 case DONT_CACHE: |
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290 /* nothing special */ |
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291 break; |
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292 case ALL_SESSION: |
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293 free(e->data.session.s); |
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294 break; |
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295 case ALL_REALM: |
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296 free(e->data.realm.s); |
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297 break; |
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298 case REALM_AND_APPLICATION: |
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299 free(e->data.realm_app.s); |
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300 break; |
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301 case ALL_APPLICATION: |
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302 break; |
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303 case ALL_HOST: |
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304 free(e->data.host.s); |
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305 break; |
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306 case ALL_USER: |
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307 free(e->data.user.s); |
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308 break; |
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309 default: |
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310 TRACE_DEBUG(INFO, "Invalid redirect type was saved"); |
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311 ASSERT(0); |
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312 return EINVAL; |
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313 } |
1259
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314 |
717
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315 free(e->from.s); |
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316 |
717
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317 free(e); |
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318 return 0; |
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319 } |