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annotate extensions/rt_default/rt_default.c @ 400:22f29007b931

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Detect when extensions are loaded several times (not allowed)
author Sebastien Decugis <sdecugis@nict.go.jp>
date Tue, 02 Jun 2009 14:49:37 +0900
parents 316bb3f38d04
children
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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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e86dba02630a Updated copyright information
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5 * Copyright (c) 2009, WIDE Project and NICT *
261
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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 /*
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37 * Basic routing of the messages based on their Destination-Realm, Destination-Host, and configuration file.
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38 */
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39
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40 #define DECLARE_API_POINTERS
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41 #include "rt_default.h"
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42
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43 static dict_object_t * dict_avp_DH = NULL; /* Destination-Host */
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44 static dict_object_t * dict_avp_DR = NULL; /* Destination-Realm */
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45
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46 int rt_default_verbosity = 0;
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47
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48 /* Analyze a message content to find Destination-Realm and Destination-Host */
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49 static int find_avps(msg_t * msg, avp_value_t ** dr, avp_value_t ** dh)
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50 {
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51 int ret = 0;
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52 msg_avp_t * avp = NULL;
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53 msg_avp_data_t * avpdata;
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54
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55 /* Destination-Host */
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56 ret = msg_search_avp( msg, dict_avp_DH, &avp );
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57 if (ret != 0) {
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58 TRACE_DEBUG(INFO, "Error in msg_search_avp: %s", strerror(ret));
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59 return ret;
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60 }
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61
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62 if (avp != NULL) {
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63 ret = msg_avp_data( avp, &avpdata );
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64 if (ret != 0) {
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65 TRACE_DEBUG(INFO, "Error in msg_avp_data: %s", strerror(ret));
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66 return ret;
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67 }
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68 *dh = avpdata->avp_data;
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69 }
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70
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71 /* Destination-Realm */
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72 ret = msg_search_avp( msg, dict_avp_DR, &avp );
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73 if (ret != 0) {
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74 TRACE_DEBUG(INFO, "Error in msg_search_avp: %s", strerror(ret));
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75 return ret;
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76 }
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77
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78 if (avp != NULL) {
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79 ret = msg_avp_data( avp, &avpdata );
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80 if (ret != 0) {
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81 TRACE_DEBUG(INFO, "Error in msg_avp_data: %s", strerror(ret));
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82 return ret;
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83 }
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84 *dr = avpdata->avp_data;
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85 }
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86
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87 return 0;
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88 }
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89
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90 /* The callback doing all the work */
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91 static int cb_def_out(void * data, msg_t * msg, rt_dpl_t * list )
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92 {
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93 int ret = 0;
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94 avp_value_t * dr = NULL;
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95 avp_value_t * dh = NULL;
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96 rt_dpl_t * candidate = list;
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97
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98 TRACE_ENTRY("%p %p", msg, list);
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99
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100 /* First find Destination Realm and Destination Host AVPs in msg */
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101 ret = find_avps(msg, &dr, &dh);
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102 if (ret != 0) {
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103 TRACE_DEBUG(INFO, "Failed to analyze the message: %s", strerror(ret));
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104 return ret;
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105 }
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106
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107 /* Then for each candidate peer for routing */
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108 while (candidate != NULL) {
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109 char * candname = NULL; /* name of this candidate peer */
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110 int tablescore = 0;
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111
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112 ret = peer_get(candidate->peer, PEER_DIAMETER_ID, (void *)&candname);
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113 if (ret != 0) {
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114 TRACE_DEBUG(INFO, "Unable to retrieve peer name: %s", strerror(ret));
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115 return ret;
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116 }
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117
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118 /* Is destination host ? */
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119 if ((rtd_conf->do_dest_host) && (dh != NULL)) {
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120 if ((dh->os.len == strlen(candname)) &&
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121 (strncasecmp(candname, (char *)dh->os.data, dh->os.len) == 0)) {
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122 TRACE_DEBUG(FULL, "Peer '%s' is Destination-Host, adding appropriate score", candname);
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123 candidate->score += rtd_conf->sc_dest_host;
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124 }
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125 }
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126
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127 /* Is matching destination realm ? */
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128 if ((rtd_conf->do_dest_realm) && (dr != NULL)) {
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129 char * candrealm = NULL; /* realm of this candidate peer */
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130
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131 ret = peer_get(candidate->peer, PEER_REALM, (void *)&candrealm);
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132 if (ret != 0) {
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diff changeset
133 TRACE_DEBUG(INFO, "Unable to retrieve peer realm: %s", strerror(ret));
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diff changeset
134 return ret;
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parents: 261
diff changeset
135 }
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parents: 261
diff changeset
136
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parents: 261
diff changeset
137 if ((dr->os.len == strlen(candrealm)) &&
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diff changeset
138 (strncasecmp(candrealm, (char *)dr->os.data, dr->os.len) == 0)) {
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diff changeset
139 TRACE_DEBUG(FULL, "Peer '%s' has matching Destination-Realm, adding appropriate score", candname);
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parents: 261
diff changeset
140 candidate->score += rtd_conf->sc_dest_realm;
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parents: 261
diff changeset
141 }
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parents: 261
diff changeset
142 }
261
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parents:
diff changeset
143
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parents:
diff changeset
144 /* Is defined in configuration as a default route ? */
267
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diff changeset
145 ret = rtd_search( dr ? dr->os.data : NULL, dr ? dr->os.len : 0, candname, &tablescore);
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parents: 261
diff changeset
146 if (ret != 0) {
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parents: 261
diff changeset
147 TRACE_DEBUG(INFO, "Internal extension error, search failed: %s", strerror(ret));
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parents: 261
diff changeset
148 return ret;
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Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
149 }
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Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
150 candidate->score += tablescore;
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parents: 261
diff changeset
151
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parents: 261
diff changeset
152 /* Move to next candidate */
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diff changeset
153 candidate = candidate->next;
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parents: 261
diff changeset
154 }
261
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parents:
diff changeset
155
267
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diff changeset
156 return 0;
261
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parents:
diff changeset
157 }
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parents:
diff changeset
158
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parents:
diff changeset
159 /* Initialize the configuration */
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parents:
diff changeset
160 rtd_conf_t * rtd_conf = NULL;
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parents:
diff changeset
161 static rtd_conf_t _conf;
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parents:
diff changeset
162
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parents:
diff changeset
163 static int conf_init(void)
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parents:
diff changeset
164 {
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parents:
diff changeset
165 rtd_conf = &_conf;
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parents:
diff changeset
166 memset(rtd_conf, 0, sizeof(rtd_conf_t));
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parents:
diff changeset
167
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parents:
diff changeset
168 /* Set the default values */
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parents:
diff changeset
169 rtd_conf->do_dest_host = 1;
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diff changeset
170 rtd_conf->do_dest_realm = 1;
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parents:
diff changeset
171
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diff changeset
172 rtd_conf->sc_dest_host = PEER_SCORE_FINALDEST;
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parents:
diff changeset
173 rtd_conf->sc_dest_realm = PEER_SCORE_DEFAULT_REALM;
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parents:
diff changeset
174
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parents:
diff changeset
175 rtd_conf->sc_no_info = 0;
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parents:
diff changeset
176 rtd_conf->sc_all = PEER_SCORE_DEFAULT;
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parents:
diff changeset
177 rtd_conf->sc_all_pref = PEER_SCORE_DEFAULT + PEER_SCORE_LOAD_BALANCE;
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parents:
diff changeset
178 rtd_conf->sc_rlm = PEER_SCORE_DEFAULT_REALM;
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parents:
diff changeset
179 rtd_conf->sc_rlm_pref = PEER_SCORE_DEFAULT_REALM + PEER_SCORE_LOAD_BALANCE;
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parents:
diff changeset
180
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parents:
diff changeset
181 return 0;
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parents:
diff changeset
182 }
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parents:
diff changeset
183
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parents:
diff changeset
184 static void conf_dump(void)
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parents:
diff changeset
185 {
353
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 315
diff changeset
186 TRACE_DEBUG(FULL, "rt_default configuration dump:\n"
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parents: 315
diff changeset
187 " Verbosity...........: %d\n"
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parents: 315
diff changeset
188 " Handle Dest Host....: %d\n"
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parents: 315
diff changeset
189 " Handle Dest Realm...: %d\n"
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
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parents: 315
diff changeset
190 " Score Dest Host.....: %d\n"
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
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parents: 315
diff changeset
191 " Score Dest Realm....: %d\n"
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parents: 315
diff changeset
192 " Score no info.......: %d\n"
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parents: 315
diff changeset
193 " Score default route.: %d\n"
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parents: 315
diff changeset
194 " Score default pref..: %d\n"
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parents: 315
diff changeset
195 " Score realm.........: %d\n"
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
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parents: 315
diff changeset
196 " Score realm pref....: %d",
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 315
diff changeset
197 rt_default_verbosity,
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parents: 315
diff changeset
198 rtd_conf->do_dest_host,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
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parents: 315
diff changeset
199 rtd_conf->do_dest_realm,
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parents: 315
diff changeset
200 rtd_conf->sc_dest_host,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
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parents: 315
diff changeset
201 rtd_conf->sc_dest_realm,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
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parents: 315
diff changeset
202 rtd_conf->sc_no_info,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 315
diff changeset
203 rtd_conf->sc_all,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 315
diff changeset
204 rtd_conf->sc_all_pref,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 315
diff changeset
205 rtd_conf->sc_rlm,
6ca21598562a Unified TRACE_DEBUG handling between daemon and extensions + some progress on radius gateway
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 315
diff changeset
206 rtd_conf->sc_rlm_pref);
261
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parents:
diff changeset
207 }
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parents:
diff changeset
208
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parents:
diff changeset
209 /* handler */
399
316bb3f38d04 Changed dict_search definition to allow two useful behaviors
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 376
diff changeset
210 static rt_out_hdl_t * rt_def_hdl = NULL;
261
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parents:
diff changeset
211
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
212 /* entry point */
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
213 static int entry(char * conffile)
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parents:
diff changeset
214 {
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parents:
diff changeset
215 int ret = 0;
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
216
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
217 TRACE_ENTRY("%p", conffile);
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
218
399
316bb3f38d04 Changed dict_search definition to allow two useful behaviors
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 376
diff changeset
219 ret = dict_search( DICT_AVP, AVP_BY_NAME, "Destination-Host", &dict_avp_DH, ENOENT );
267
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
220 if (ret != 0) {
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
221 log_error("Error initializing extension's dictionary objects: %s\n", strerror(ret));
21cb3f31861e Completed the code of the extension
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parents: 261
diff changeset
222 return ret;
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
223 }
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
224
399
316bb3f38d04 Changed dict_search definition to allow two useful behaviors
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 376
diff changeset
225 ret = dict_search( DICT_AVP, AVP_BY_NAME, "Destination-Realm", &dict_avp_DR, ENOENT );
267
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
226 if (ret != 0) {
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
227 log_error("Error initializing extension's dictionary objects: %s\n", strerror(ret));
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
228 return ret;
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
229 }
21cb3f31861e Completed the code of the extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 261
diff changeset
230
261
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
231 ret = conf_init();
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
232 if (ret != 0) {
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
233 log_error("Error initializing extension: %s\n", strerror(ret));
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
234 return ret;
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
235 }
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
236
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
237 ret = rtd_init();
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
238 if (ret != 0) {
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
239 log_error("Error initializing extension: %s\n", strerror(ret));
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
240 return ret;
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
241 }
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
242
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
243 if (conffile != NULL) {
315
3cebe1c677ab Change build system to CMake (lots of changes)
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 267
diff changeset
244 ret = rtd_conf_handle(conffile);
261
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
245 if (ret != 0) {
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parents:
diff changeset
246 log_error("Error parsing extension configuration: %s\n", strerror(ret));
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
247 return ret;
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
248 }
376
98806d0e175f Unified debug messages when loading extensions
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 371
diff changeset
249 TRACE_DEBUG(INFO, "Extension RT/Default initialized with configuration: '%s'", conffile);
261
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parents:
diff changeset
250 conf_dump();
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
251 rtd_dump();
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
252 } else {
376
98806d0e175f Unified debug messages when loading extensions
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parents: 371
diff changeset
253 TRACE_DEBUG(INFO, "Extension RT/Default initialized with default configuration");
261
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parents:
diff changeset
254 }
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
255
399
316bb3f38d04 Changed dict_search definition to allow two useful behaviors
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 376
diff changeset
256 return rt_out_register( cb_def_out, NULL, RT_OUT_NORMAL, &rt_def_hdl );
261
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parents:
diff changeset
257 }
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parents:
diff changeset
258
b57b797e15fd Added structure for default routing extension
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parents:
diff changeset
259 /* Unload */
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parents:
diff changeset
260 void waaad_ext_fini(void)
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
261 {
399
316bb3f38d04 Changed dict_search definition to allow two useful behaviors
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 376
diff changeset
262 rt_out_unregister ( rt_def_hdl );
261
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
263 rtd_fini();
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Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
264 }
b57b797e15fd Added structure for default routing extension
Sebastien Decugis <sdecugis@nict.go.jp>
parents:
diff changeset
265
400
22f29007b931 Detect when extensions are loaded several times (not allowed)
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 399
diff changeset
266 EXTENSION_API_INIT( API_MODULE_ALL, entry, "rt_default", 1);
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