Mercurial > hg > freeDiameter
view freeDiameter/p_dp.c @ 417:195096819152 1.0.0-rc1
Cleanups in documentation
author | Sebastien Decugis <sdecugis@nict.go.jp> |
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date | Thu, 08 Jul 2010 17:55:18 +0900 |
parents | 26aafbbc1640 |
children | f1484823cb4a |
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/********************************************************************************************************* * Software License Agreement (BSD License) * * Author: Sebastien Decugis <sdecugis@nict.go.jp> * * * * Copyright (c) 2010, WIDE Project and NICT * * All rights reserved. * * * * Redistribution and use of this software in source and binary forms, with or without modification, are * * permitted provided that the following conditions are met: * * * * * Redistributions of source code must retain the above * * copyright notice, this list of conditions and the * * following disclaimer. * * * * * Redistributions in binary form must reproduce the above * * copyright notice, this list of conditions and the * * following disclaimer in the documentation and/or other * * materials provided with the distribution. * * * * * Neither the name of the WIDE Project or NICT nor the * * names of its contributors may be used to endorse or * * promote products derived from this software without * * specific prior written permission of WIDE Project and * * NICT. * * * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED * * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * *********************************************************************************************************/ #include "fD.h" /* This file contains code to handle Disconnect Peer messages (DPR and DPA) */ /* Handle a received message */ int fd_p_dp_handle(struct msg ** msg, int req, struct fd_peer * peer) { TRACE_ENTRY("%p %d %p", msg, req, peer); if (req) { /* We received a DPR, save the Disconnect-Cause and terminate the connection */ struct avp * dc; int delay = peer->p_hdr.info.config.pic_tctimer ?: fd_g_config->cnf_timer_tc; CHECK_FCT( fd_msg_search_avp ( *msg, fd_dict_avp_DC, &dc )); if (dc) { /* Check the value is consistent with the saved one */ struct avp_hdr * hdr; CHECK_FCT( fd_msg_avp_hdr( dc, &hdr ) ); if (hdr->avp_value == NULL) { /* This is a sanity check */ TRACE_DEBUG(NONE, "BUG: Unset value in Disconnect-Cause in DPR"); fd_msg_dump_one(NONE, dc); ASSERT(0); /* To check if this really happens, and understand why... */ } peer->p_hdr.info.runtime.pir_lastDC = hdr->avp_value->u32; switch (hdr->avp_value->u32) { case ACV_DC_REBOOTING: default: /* We use TcTimer to attempt reconnection */ break; case ACV_DC_BUSY: /* No need to hammer the overloaded peer */ delay *= 10; break; case ACV_DC_NOT_FRIEND: /* He does not want to speak to us... let's retry a lot later maybe */ delay *= 200; break; } } if (TRACE_BOOL(INFO)) { if (dc) { struct dict_object * dictobj = NULL; struct dict_enumval_request er; memset(&er, 0, sizeof(er)); CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_TYPE, TYPE_OF_AVP, fd_dict_avp_DC, &er.type_obj, ENOENT ) ); er.search.enum_value.u32 = peer->p_hdr.info.runtime.pir_lastDC; CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &er, &dictobj, 0 ) ); if (dictobj) { CHECK_FCT( fd_dict_getval( dictobj, &er.search ) ); TRACE_DEBUG(INFO, "Peer '%s' sent a DPR with cause: %s\n", peer->p_hdr.info.pi_diamid, er.search.enum_name); } else { TRACE_DEBUG(INFO, "Peer '%s' sent a DPR with unknown cause: %u\n", peer->p_hdr.info.pi_diamid, peer->p_hdr.info.runtime.pir_lastDC); } } else { TRACE_DEBUG(INFO, "Peer '%s' sent a DPR without Disconnect-Cause AVP\n", peer->p_hdr.info.pi_diamid); } } /* Now reply with a DPA */ CHECK_FCT( fd_msg_new_answer_from_req ( fd_g_config->cnf_dict, msg, 0 ) ); CHECK_FCT( fd_msg_rescode_set( *msg, "DIAMETER_SUCCESS", NULL, NULL, 1 ) ); /* Move to CLOSING state to failover outgoing messages (and avoid failing the DPA...) */ CHECK_FCT( fd_psm_change_state(peer, STATE_CLOSING) ); /* Now send the DPA */ CHECK_FCT( fd_out_send( msg, NULL, peer, FD_CNX_ORDERED) ); /* Move to CLOSED state */ fd_psm_cleanup(peer, 0); /* Reset the timer for next connection attempt -- we'll retry sooner or later depending on the disconnection cause */ fd_psm_next_timeout(peer, 1, delay); } else { /* We received a DPA */ if (peer->p_hdr.info.runtime.pir_state != STATE_CLOSING) { TRACE_DEBUG(INFO, "Ignoring DPA received in state %s", STATE_STR(peer->p_hdr.info.runtime.pir_state)); } /* 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 */ CHECK_FCT_DO( fd_msg_free( *msg ), /* continue */ ); *msg = NULL; /* The calling function handles cleaning the PSM and terminating the peer since we return in CLOSING state */ } return 0; } /* Start disconnection of a peer: send DPR */ int fd_p_dp_initiate(struct fd_peer * peer, char * reason) { struct msg * msg = NULL; struct dict_object * dictobj = NULL; struct avp * avp = NULL; struct dict_enumval_request er; union avp_value val; TRACE_ENTRY("%p %p", peer, reason); /* Create a new DWR instance */ CHECK_FCT( fd_msg_new ( fd_dict_cmd_DPR, MSGFL_ALLOC_ETEID, &msg ) ); /* Add the Origin information */ CHECK_FCT( fd_msg_add_origin ( msg, 0 ) ); /* Add the Disconnect-Cause */ CHECK_FCT( fd_msg_avp_new ( fd_dict_avp_DC, 0, &avp ) ); /* Search the value in the dictionary */ memset(&er, 0, sizeof(er)); CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_TYPE, TYPE_OF_AVP, fd_dict_avp_DC, &er.type_obj, ENOENT ) ); er.search.enum_name = reason ?: "REBOOTING"; CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_ENUMVAL, ENUMVAL_BY_STRUCT, &er, &dictobj, ENOENT ) ); CHECK_FCT( fd_dict_getval( dictobj, &er.search ) ); /* Set the value in the AVP */ val.u32 = er.search.enum_value.u32; CHECK_FCT( fd_msg_avp_setvalue( avp, &val ) ); CHECK_FCT( fd_msg_avp_add( msg, MSG_BRW_LAST_CHILD, avp ) ); /* Save the value also in the peer */ peer->p_hdr.info.runtime.pir_lastDC = val.u32; /* Update the peer state and timer */ CHECK_FCT( fd_psm_change_state(peer, STATE_CLOSING) ); fd_psm_next_timeout(peer, 0, DPR_TIMEOUT); /* Now send the DPR message */ CHECK_FCT_DO( fd_out_send(&msg, NULL, peer, FD_CNX_ORDERED), /* ignore since we are on timeout anyway */ ); return 0; }