--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sip-manual-out/main.c	Tue Sep 20 10:14:18 2022 -0800
@@ -0,0 +1,106 @@
+/*
+ * This is the main module for sip-manual-out test program.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include "../libsip/out_msg.h"
+#include "../libsip/sdp.h"
+
+extern int sip_socket;
+extern struct in_addr sip_bind_ip, sip_dest_ip;
+extern unsigned sip_bind_port, sip_dest_port;
+extern char sip_dest_domain[];
+extern struct sockaddr_in dummy_rtp_endp;
+
+struct sockaddr_in sip_dest_sin;
+char from_uri[128], to_uri[128], call_id[128];
+struct timeval cur_event_time;
+
+send_invite_req()
+{
+	struct sip_msg_out msg;
+	struct sdp_gen sdp;
+	int rc;
+
+	rc = start_request_out_msg(&msg, "INVITE", to_uri);
+	if (rc < 0) {
+msg_size_err:	fprintf(stderr, "composing INVITE req: msg size error\n");
+		exit(1);
+	}
+	rc = add_req_boilerplate(&msg, "1 INVITE");
+	if (rc < 0)
+		goto msg_size_err;
+	rc = add_contact_header(&msg);
+	if (rc < 0)
+		goto msg_size_err;
+	rc = out_msg_add_header(&msg, "Content-Type", "application/sdp");
+	if (rc < 0)
+		goto msg_size_err;
+	bzero(&sdp, sizeof sdp);
+	sdp.conn_ip = dummy_rtp_endp.sin_addr;
+	sdp.conn_port = ntohs(dummy_rtp_endp.sin_port);
+	sdp.codec_mask = SDP_CODEC_MASK_BOTH;
+	sdp.session_id = sdp.conn_port << 16;
+	sdp.owner_ip = sip_bind_ip;
+	rc = out_msg_finish_sdp(&msg, &sdp);
+	if (rc < 0)
+		goto msg_size_err;
+	sip_tx_packet(&msg, &sip_dest_sin);
+}
+
+main(argc, argv)
+	char **argv;
+{
+	fd_set fds;
+	int rc;
+
+	if (argc < 4 || argc > 5) {
+		fprintf(stderr,
+			"usage: %s dest-conf from-num to-num [logfile]\n",
+			argv[0]);
+		exit(1);
+	}
+	read_config_file(argv[1]);
+	open_sip_udp_socket();
+	obtain_dummy_rtp();
+	sip_dest_sin.sin_family = AF_INET;
+	sip_dest_sin.sin_addr = sip_dest_ip;
+	sip_dest_sin.sin_port = htons(sip_dest_port);
+	sprintf(from_uri, "sip:%s@%s", argv[2], inet_ntoa(sip_bind_ip));
+	sprintf(to_uri, "sip:%s@%s", argv[3], sip_dest_domain);
+	if (argv[4]) {
+		rc = open_sip_log_file(argv[4]);
+		if (rc < 0)
+			exit(1);	/* error msg already printed */
+	}
+	gettimeofday(&cur_event_time, 0);
+	sprintf(call_id, "%08u_%u@%s",
+		(unsigned)(cur_event_time.tv_sec % 100000000),
+		ntohs(dummy_rtp_endp.sin_port), inet_ntoa(sip_bind_ip));
+	send_invite_req();
+	/* main select loop */
+	for (;;) {
+		FD_ZERO(&fds);
+		FD_SET(sip_socket, &fds);
+		rc = select(sip_socket+1, &fds, 0, 0, 0);
+		if (rc < 0) {
+			if (errno == EINTR)
+				continue;
+			perror("select");
+			exit(1);
+		}
+		gettimeofday(&cur_event_time, 0);
+		if (FD_ISSET(sip_socket, &fds))
+			sip_socket_select();
+	}
+}