FreeCalypso > hg > themwi-system-sw

changeset 163:bfa9f0c0f0ac

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sip-out: handle incoming BYE as UAS
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 12 Oct 2022 14:45:31 -0800
parents 83022d408071
children baaa6c1a3d3b
files sip-out/Makefile sip-out/bye_in.c sip-out/call.h sip-out/call_list.c sip-out/invite.c
diffstat 5 files changed, 117 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/sip-out/Makefile	Wed Oct 12 13:44:16 2022 -0800
+++ b/sip-out/Makefile	Wed Oct 12 14:45:31 2022 -0800
@@ -1,8 +1,8 @@
 CC=	gcc
 CFLAGS=	-O2
 PROG=	themwi-sip-out
-OBJS=	call_clear.o call_list.o call_setup.o disconnect.o invite.o main.o \
-	mgw_ops.o mgw_resp.o mgw_sock.o mncc_sig_in.o mncc_sig_out.o \
+OBJS=	bye_in.o call_clear.o call_list.o call_setup.o disconnect.o invite.o \
+	main.o mgw_ops.o mgw_resp.o mgw_sock.o mncc_sig_in.o mncc_sig_out.o \
 	mncc_sock.o readconf.o retrans.o shutdown.o sip_log.o sip_uas.o \
 	sip_udp.o uac_out.o uac_resp.o
 LIBS=	../liboutrt/liboutrt.a ../libsip/libsip.a ../libutil/libutil.a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sip-out/bye_in.c	Wed Oct 12 14:45:31 2022 -0800
@@ -0,0 +1,108 @@
+/*
+ * Here we handle incoming BYE requests in the UAS role.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <netinet/in.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 "../include/out_routes.h"
+#include "../libsip/parse.h"
+#include "../libsip/uas_basic.h"
+#include "../libsip/out_msg.h"
+#include "call.h"
+
+extern struct call *find_call_by_sip_id();
+
+extern unsigned sip_linger_gotbye;
+extern unsigned sip_linger_response_err;
+
+static void
+bye_found_call(req, ess, sin, call)
+	struct sip_pkt_rx *req;
+	struct uas_parse_hdrs *ess;
+	struct sockaddr_in *sin;
+	struct call *call;
+{
+	struct sip_msg_out resp;
+	int rc;
+
+	switch (call->sip_state) {
+	case SIP_STATE_INV_SENT:
+	case SIP_STATE_100_RCVD:
+	case SIP_STATE_CONNECTED:
+		call->overall_state = OVERALL_STATE_TEARDOWN;
+		disconnect_mncc(call, GSM48_CAUSE_LOC_NET_BEYOND,
+				GSM48_CC_CAUSE_NORM_CALL_CLEAR);
+		disconnect_tmgw(call);
+		call->sip_state = SIP_STATE_ENDED;
+		sip_mark_end_time(call, sip_linger_gotbye);
+		break;
+	case SIP_STATE_CANCEL_SENT:
+	case SIP_STATE_BYE_SENT:
+		call->sip_state = SIP_STATE_ENDED;
+		sip_mark_end_time(call, sip_linger_gotbye);
+		break;
+	case SIP_STATE_ACCEPT_100:
+	case SIP_STATE_ACCEPT_200:
+	case SIP_STATE_ENDED:
+		break;
+	case SIP_STATE_MSG_SIZE_ERR:
+		return;
+	default:
+		syslog(LOG_CRIT,
+			"FATAL: invalid SIP state 0x%x on incoming BYE",
+			call->sip_state);
+		exit(1);
+	}
+	/* send 200 response to BYE */
+	start_response_out_msg(&resp, "200 OK");
+	rc = add_resp_basic_headers(&resp, ess, req->req_method);
+	if (rc < 0) {
+		syslog(LOG_ERR, "msg size error responding to BYE");
+		call->sip_state = SIP_STATE_MSG_SIZE_ERR;
+		sip_mark_end_time(call, sip_linger_response_err);
+		return;
+	}
+	out_msg_finish(&resp);
+	sip_tx_packet(&resp, sin);
+}
+
+static void
+bye_unknown_call(req, ess, sin)
+	struct sip_pkt_rx *req;
+	struct uas_parse_hdrs *ess;
+	struct sockaddr_in *sin;
+{
+	struct sip_msg_out resp;
+	int rc;
+
+	start_response_out_msg(&resp, "481 Call-ID not found");
+	rc = add_resp_basic_headers(&resp, ess, req->req_method);
+	if (rc < 0)
+		return;
+	out_msg_finish(&resp);
+	sip_tx_packet(&resp, sin);
+}
+
+void
+handle_bye_req(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)
+		bye_found_call(req, ess, sin, call);
+	else
+		bye_unknown_call(req, ess, sin);
+}
--- a/sip-out/call.h	Wed Oct 12 13:44:16 2022 -0800
+++ b/sip-out/call.h	Wed Oct 12 14:45:31 2022 -0800
@@ -76,6 +76,7 @@
 #define	SIP_STATE_ACCEPT_100		6
 #define	SIP_STATE_ACCEPT_200		7
 #define	SIP_STATE_ENDED			8
+#define	SIP_STATE_MSG_SIZE_ERR		9
 
 #define	MGW_STATE_NO_EXIST		0
 #define	MGW_STATE_ALLOCATED		1
--- a/sip-out/call_list.c	Wed Oct 12 13:44:16 2022 -0800
+++ b/sip-out/call_list.c	Wed Oct 12 14:45:31 2022 -0800
@@ -65,6 +65,7 @@
 		case SIP_STATE_ACCEPT_100:
 		case SIP_STATE_ACCEPT_200:
 		case SIP_STATE_ENDED:
+		case SIP_STATE_MSG_SIZE_ERR:
 			if (call->overall_state != OVERALL_STATE_SIP_FINISH)
 				continue;
 			if (got_dead_sip) {
--- a/sip-out/invite.c	Wed Oct 12 13:44:16 2022 -0800
+++ b/sip-out/invite.c	Wed Oct 12 14:45:31 2022 -0800
@@ -152,7 +152,7 @@
 			disconnect_mncc(call, GSM48_CAUSE_LOC_PRN_S_LU,
 					GSM48_CC_CAUSE_DEST_OOO);
 			disconnect_tmgw(call);
-			call->sip_state = SIP_STATE_ENDED;
+			call->sip_state = SIP_STATE_MSG_SIZE_ERR;
 			sip_mark_end_time(call, sip_linger_response_err);
 			return;
 		}
@@ -212,7 +212,7 @@
 			syslog(LOG_CRIT,
 				"ACK to %03u response exceeds msg size!",
 				msg->status_code);
-			call->sip_state = SIP_STATE_ENDED;
+			call->sip_state = SIP_STATE_MSG_SIZE_ERR;
 			sip_mark_end_time(call, sip_linger_response_err);
 			return;
 		}
@@ -221,6 +221,7 @@
 		initiate_bye(call);
 		return;
 	case SIP_STATE_ENDED:
+	case SIP_STATE_MSG_SIZE_ERR:
 		return;
 	default:
 		syslog(LOG_CRIT,
@@ -315,6 +316,8 @@
 {
 	int rc;
 
+	if (call->sip_state == SIP_STATE_MSG_SIZE_ERR)
+		return;
 	rc = send_ack(call, tag, sin);
 	if (rc < 0)
 		syslog(LOG_CRIT, "ACK to %03u response exceeds msg size!",