FreeCalypso > hg > themwi-system-sw
view sip-in/invite_resp.c @ 165:9419fe55824f
themwi-sip-out complete to the point of compiling and linking
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 12 Oct 2022 17:05:45 -0800 |
parents | 4b685a5d9bd4 |
children |
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/* * Here we implement SIP INVITE response generation. */ #include <sys/types.h> #include <sys/socket.h> #include <sys/time.h> #include <netinet/in.h> #include <arpa/inet.h> #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <syslog.h> #include "../include/gsm48_const.h" #include "../libsip/sdp.h" #include "../libsip/out_msg.h" #include "call.h" extern struct in_addr sip_bind_ip; extern unsigned sip_bind_port; extern unsigned sip_linger_error; fill_invite_resp_from_call(msg, call) struct sip_msg_out *msg; struct call *call; { char cseq_str[32]; int rc; rc = out_msg_add_header(msg, "From", call->invite_from); if (rc < 0) return rc; rc = out_msg_add_header(msg, "To", call->invite_to); if (rc < 0) return rc; rc = out_msg_add_header(msg, "Call-ID", call->sip_call_id); if (rc < 0) return rc; sprintf(cseq_str, "%u INVITE", call->invite_cseq); rc = out_msg_add_header(msg, "CSeq", cseq_str); if (rc < 0) return rc; return out_msg_add_header(msg, "Via", call->invite_via); } fill_invite_200_resp(msg, call) struct sip_msg_out *msg; struct call *call; { char contact_str[80]; struct sdp_gen sdp; int rc; start_response_out_msg(msg, "200 CONNECT"); rc = fill_invite_resp_from_call(msg, call); if (rc < 0) return rc; sprintf(contact_str, "<sip:%s:%u;transport=udp>", inet_ntoa(sip_bind_ip), sip_bind_port); rc = out_msg_add_header(msg, "Contact", contact_str); if (rc < 0) return rc; rc = out_msg_add_header(msg, "Content-Type", "application/sdp"); if (rc < 0) return rc; bzero(&sdp, sizeof sdp); sdp.conn_ip = call->pstn_rtp_local.sin_addr; sdp.conn_port = ntohs(call->pstn_rtp_local.sin_port); sdp.codec_mask = call->use_pcma ? SDP_CODEC_MASK_PCMA : SDP_CODEC_MASK_PCMU; sdp.session_id = (sdp.conn_port << 16) | call->sdp_addend; sdp.owner_ip = sip_bind_ip; return out_msg_finish_sdp(msg, &sdp); } void signal_invite_ringing(call) struct call *call; { struct sip_msg_out resp; int rc; start_response_out_msg(&resp, "180 Ringing"); rc = fill_invite_resp_from_call(&resp, call); if (rc < 0) { msg_size_err: syslog(LOG_ERR, "INVITE 180 response length exceeded"); call->sip_state = SIP_STATE_MSG_SIZE_ERR; call->overall_state = OVERALL_STATE_TEARDOWN; disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INTERWORKING); disconnect_tmgw(call); sip_mark_end_time(call, sip_linger_error); return; } if (call->use_100rel) { rc = out_msg_add_header(&resp, "Require", "100rel"); if (rc < 0) goto msg_size_err; rc = out_msg_add_header(&resp, "RSeq", "1"); if (rc < 0) goto msg_size_err; } out_msg_finish(&resp); sip_tx_packet(&resp, &call->udp_sin); if (call->use_100rel) { call->sip_state = SIP_STATE_RINGING_REL; call->sip_tx_count = 1; } else call->sip_state = SIP_STATE_RINGING; } void signal_invite_200(call) struct call *call; { struct sip_msg_out resp; int rc; rc = fill_invite_200_resp(&resp, call); if (rc < 0) { syslog(LOG_ERR, "INVITE 200 response length exceeded"); call->sip_state = SIP_STATE_MSG_SIZE_ERR; call->overall_state = OVERALL_STATE_TEARDOWN; disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU, GSM48_CC_CAUSE_INTERWORKING); disconnect_tmgw(call); sip_mark_end_time(call, sip_linger_error); return; } sip_tx_packet(&resp, &call->udp_sin); call->sip_state = SIP_STATE_INVITE_200; call->sip_tx_count = 1; } void signal_invite_error(call) struct call *call; { struct sip_msg_out resp; int rc; start_response_out_msg(&resp, call->invite_fail); rc = fill_invite_resp_from_call(&resp, call); if (rc < 0) { syslog(LOG_ERR, "INVITE late error response length exceeded"); call->sip_state = SIP_STATE_MSG_SIZE_ERR; sip_mark_end_time(call, sip_linger_error); transition_dead_sip(call); return; } out_msg_finish(&resp); sip_tx_packet(&resp, &call->udp_sin); call->sip_state = SIP_STATE_INVITE_ERR; call->sip_tx_count = 1; }