FreeCalypso > hg > themwi-system-sw
view sip-in/sip_ack.c @ 78:72b7d85d6354
sip-in: retransmission error handling
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Tue, 20 Sep 2022 18:00:56 -0800 |
parents | 8cf85edca543 |
children | 3e3fbf44f9d7 |
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/* * Here we implement our handling of SIP ACK, the last step * in the 3-way INVITE handshake. */ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <syslog.h> #include "../libsip/parse.h" #include "../libsip/uas_basic.h" #include "call.h" extern struct call *find_call_by_sip_id(); void handle_sip_ack(req, ess, sin) struct sip_pkt_rx *req; struct uas_parse_hdrs *ess; struct sockaddr_in *sin; { struct call *call; call = find_call_by_sip_id(ess->call_id); if (!call) return; /* ignore spurious ACK */ /* weed out wrong CSeq */ if (ess->cseq_num != call->invite_cseq) return; switch (call->sip_state) { case SIP_STATE_INVITE_200: call->sip_state = SIP_STATE_CONNECTED; break; case SIP_STATE_INVITE_ERR: call->sip_state = SIP_STATE_ENDED; break; } }