Mercurial > hg > freeDiameter
annotate libfdcore/p_dp.c @ 1562:6219359a36a9 default tip
Merge latest changes from proposed branch
| author | Sebastien Decugis <sdecugis@freediameter.net> |
|---|---|
| date | Mon, 21 Jun 2021 19:08:18 +0800 |
| parents | 8f9684264fe0 |
| children |
| rev | line source |
|---|---|
| 36 | 1 /********************************************************************************************************* |
| 2 * Software License Agreement (BSD License) * | |
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3 * Author: Sebastien Decugis <sdecugis@freediameter.net> * |
| 36 | 4 * * |
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5 * Copyright (c) 2013, WIDE Project and NICT * |
| 36 | 6 * All rights reserved. * |
| 7 * * | |
| 8 * Redistribution and use of this software in source and binary forms, with or without modification, are * | |
| 9 * permitted provided that the following conditions are met: * | |
| 10 * * | |
| 11 * * Redistributions of source code must retain the above * | |
| 12 * copyright notice, this list of conditions and the * | |
| 13 * following disclaimer. * | |
| 14 * * | |
| 15 * * Redistributions in binary form must reproduce the above * | |
| 16 * copyright notice, this list of conditions and the * | |
| 17 * following disclaimer in the documentation and/or other * | |
| 18 * materials provided with the distribution. * | |
| 19 * * | |
| 20 * * Neither the name of the WIDE Project or NICT nor the * | |
| 21 * names of its contributors may be used to endorse or * | |
| 22 * promote products derived from this software without * | |
| 23 * specific prior written permission of WIDE Project and * | |
| 24 * NICT. * | |
| 25 * * | |
| 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED * | |
| 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * | |
| 28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * | |
| 29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * | |
| 30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * | |
| 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * | |
| 32 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * | |
| 33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * | |
| 34 *********************************************************************************************************/ | |
| 35 | |
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36 #include "fdcore-internal.h" |
| 36 | 37 |
| 38 /* This file contains code to handle Disconnect Peer messages (DPR and DPA) */ | |
| 39 | |
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40 /* Delay to use before next reconnect attempt */ |
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41 int fd_p_dp_newdelay(struct fd_peer * peer) |
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42 { |
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43 int delay = peer->p_hdr.info.config.pic_tctimer ?: fd_g_config->cnf_timer_tc; |
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44 |
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45 switch (peer->p_hdr.info.runtime.pir_lastDC) { |
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46 case ACV_DC_REBOOTING: |
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47 default: |
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48 /* We use TcTimer to attempt reconnection */ |
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49 break; |
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50 case ACV_DC_BUSY: |
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51 /* No need to hammer the overloaded peer */ |
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52 delay *= 10; |
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53 break; |
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54 case ACV_DC_NOT_FRIEND: |
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55 /* He does not want to speak to us... let's retry a *lot* later maybe */ |
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56 delay *= 200; |
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57 break; |
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58 } |
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59 return delay; |
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60 } |
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61 |
| 36 | 62 /* Handle a received message */ |
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63 int fd_p_dp_handle(struct msg ** msg, int req, struct fd_peer * peer) |
| 36 | 64 { |
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65 long to_receive, to_send; |
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66 TRACE_ENTRY("%p %d %p", msg, req, peer); |
| 36 | 67 |
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68 if (req) { |
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69 /* We received a DPR, save the Disconnect-Cause and go to CLOSING_GRACE or terminate the connection */ |
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70 struct avp * dc; |
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71 |
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72 CHECK_FCT( fd_msg_search_avp ( *msg, fd_dict_avp_DC, &dc )); |
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73 if (dc) { |
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74 struct avp_hdr * hdr; |
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75 CHECK_FCT( fd_msg_avp_hdr( dc, &hdr ) ); |
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76 if (hdr->avp_value == NULL) { |
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77 /* This is a sanity check */ |
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78 LOG_F("BUG: Unset value in Disconnect-Cause in DPR"); |
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79 ASSERT(0); /* To check if this really happens, and understand why... */ |
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80 } |
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81 |
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82 /* save the cause */ |
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83 peer->p_hdr.info.runtime.pir_lastDC = hdr->avp_value->u32; |
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84 } |
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85 if (TRACE_BOOL(INFO)) { |
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86 if (dc) { |
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87 struct dict_object * dictobj; |
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88 struct dict_enumval_request er; |
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89 memset(&er, 0, sizeof(er)); |
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90 |
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91 /* prepare the request */ |
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92 CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_TYPE, TYPE_OF_AVP, fd_dict_avp_DC, &er.type_obj, ENOENT ) ); |
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93 er.search.enum_value.u32 = peer->p_hdr.info.runtime.pir_lastDC; |
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94 |
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95 /* Search the enum value */ |
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96 CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &er, &dictobj, 0 ) ); |
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97 if (dictobj) { |
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98 CHECK_FCT( fd_dict_getval( dictobj, &er.search ) ); |
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99 TRACE_DEBUG(INFO, "Peer '%s' sent a DPR with cause: %s", peer->p_hdr.info.pi_diamid, er.search.enum_name); |
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100 } else { |
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101 TRACE_DEBUG(INFO, "Peer '%s' sent a DPR with unknown cause: %u", peer->p_hdr.info.pi_diamid, peer->p_hdr.info.runtime.pir_lastDC); |
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102 } |
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103 } else { |
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104 TRACE_DEBUG(INFO, "Peer '%s' sent a DPR without Disconnect-Cause AVP", peer->p_hdr.info.pi_diamid); |
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105 } |
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106 } |
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107 |
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108 /* Now reply with a DPA */ |
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109 CHECK_FCT( fd_msg_new_answer_from_req ( fd_g_config->cnf_dict, msg, 0 ) ); |
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110 CHECK_FCT( fd_msg_rescode_set( *msg, "DIAMETER_SUCCESS", NULL, NULL, 1 ) ); |
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111 |
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112 /* Do we have pending exchanges with this peer? */ |
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113 CHECK_FCT( fd_peer_get_load_pending(&peer->p_hdr, &to_receive, &to_send) ); |
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114 |
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115 if ((to_receive == 0) && (to_send == 0)) { |
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116 /* No pending exchange, move to CLOSING directly */ |
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117 CHECK_FCT( fd_psm_change_state(peer, STATE_CLOSING) ); |
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118 |
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119 /* Now send the DPA */ |
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120 CHECK_FCT( fd_out_send( msg, NULL, peer, 0) ); |
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121 |
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122 /* and move to CLOSED */ |
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123 fd_psm_cleanup(peer, 0); |
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124 |
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125 /* Reset the timer for next connection attempt -- we'll retry sooner or later depending on the disconnection cause */ |
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126 fd_psm_next_timeout(peer, 1, fd_p_dp_newdelay(peer)); |
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127 } else { |
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128 /* We have pending exchanges, we move to CLOSING_GRACE which allows exchanges of answers but |
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129 not new requests */ |
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130 CHECK_FCT( fd_psm_change_state(peer, STATE_CLOSING_GRACE) ); |
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131 fd_psm_next_timeout(peer, 0, GRACE_TIMEOUT); |
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132 |
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133 /* Now send the DPA */ |
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134 CHECK_FCT( fd_out_send( msg, NULL, peer, 0) ); |
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135 } |
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136 } else { |
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137 /* We received a DPA */ |
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138 int curstate = fd_peer_getstate(peer); |
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139 if (curstate != STATE_CLOSING_GRACE) { |
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140 TRACE_DEBUG(INFO, "Ignoring DPA received in state %s", STATE_STR(curstate)); |
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141 } |
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142 |
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143 /* In theory, we should control the Result-Code AVP. But since we will not go back to OPEN state here anyway, let's skip it */ |
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144 |
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145 /* TODO("Control Result-Code in the DPA") */ |
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146 CHECK_FCT_DO( fd_msg_free( *msg ), /* continue */ ); |
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147 *msg = NULL; |
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148 |
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149 /* Do we still have pending exchanges with this peer? */ |
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150 CHECK_FCT( fd_peer_get_load_pending(&peer->p_hdr, &to_receive, &to_send) ); |
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151 if ((to_receive != 0) || (to_send != 0)) { |
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152 TRACE_DEBUG(INFO, "Received DPA but pending load: [%ld, %ld], giving grace delay before closing", to_receive, to_send); |
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153 fd_psm_next_timeout(peer, 0, GRACE_TIMEOUT); |
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154 peer->p_flags.pf_localterm = 1; |
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155 } else { |
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156 /* otherwise, go to CLOSING state, the psm will handle terminating the connection */ |
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157 CHECK_FCT( fd_psm_change_state(peer, STATE_CLOSING) ); |
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158 } |
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159 } |
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160 |
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161 return 0; |
| 36 | 162 } |
| 163 | |
| 164 /* Start disconnection of a peer: send DPR */ | |
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165 int fd_p_dp_initiate(struct fd_peer * peer, char * reason) |
| 36 | 166 { |
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167 struct msg * msg = NULL; |
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168 struct dict_object * dictobj = NULL; |
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169 struct avp * avp = NULL; |
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170 struct dict_enumval_request er; |
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171 union avp_value val; |
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172 |
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173 TRACE_ENTRY("%p %p", peer, reason); |
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174 |
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175 /* Create a new DWR instance */ |
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176 CHECK_FCT( fd_msg_new ( fd_dict_cmd_DPR, MSGFL_ALLOC_ETEID, &msg ) ); |
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177 |
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178 /* Add the Origin information */ |
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179 CHECK_FCT( fd_msg_add_origin ( msg, 0 ) ); |
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180 |
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181 /* Add the Disconnect-Cause */ |
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182 CHECK_FCT( fd_msg_avp_new ( fd_dict_avp_DC, 0, &avp ) ); |
| 36 | 183 |
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184 /* Search the value in the dictionary */ |
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185 memset(&er, 0, sizeof(er)); |
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186 CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_TYPE, TYPE_OF_AVP, fd_dict_avp_DC, &er.type_obj, ENOENT ) ); |
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187 er.search.enum_name = reason ?: "REBOOTING"; |
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188 CHECK_FCT_DO( fd_dict_search( fd_g_config->cnf_dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &er, &dictobj, ENOENT ), { ASSERT(0); /* internal error: unknown reason */ } ); |
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189 CHECK_FCT( fd_dict_getval( dictobj, &er.search ) ); |
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190 |
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191 /* Set the value in the AVP */ |
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192 val.u32 = er.search.enum_value.u32; |
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193 CHECK_FCT( fd_msg_avp_setvalue( avp, &val ) ); |
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194 CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp ) ); |
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195 |
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196 /* Save the value also in the peer */ |
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197 peer->p_hdr.info.runtime.pir_lastDC = val.u32; |
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198 |
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199 /* Update the peer state and timer */ |
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200 CHECK_FCT( fd_psm_change_state(peer, STATE_CLOSING_GRACE) ); |
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201 fd_psm_next_timeout(peer, 0, DPR_TIMEOUT); |
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202 |
| 80 | 203 /* Now send the DPR message */ |
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204 CHECK_FCT_DO( fd_out_send(&msg, NULL, peer, 0), /* ignore since we are on timeout anyway */ ); |
| 80 | 205 |
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206 return 0; |
| 36 | 207 } |