From: michael <michael>
Date: Sun, 2 Jul 2006 11:07:15 +0000 (+0000)
Subject: 'cleanup'. it's still as ugly as before
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/record-dvb/commitdiff_plain/ed3679acee1dbd17f59ca487941d0bf35f9eab2a?hp=dacdaa20393daa4f49e9e2b5ddced3d6c2206555

'cleanup'. it's still as ugly as before
---

diff --git a/sap.c b/sap.c
index 64f1437..d8b0284 100644
--- a/sap.c
+++ b/sap.c
@@ -22,6 +22,97 @@
 
 #define BUFFSIZE	SAP_MAX_SIZE
 
+struct sdp_info {
+	char *service;
+	char *host;
+	char *proto;
+	char *port;
+};
+
+struct sdp_info *parse_sdp(char *sdp, int len)
+{
+	char *pos;
+	static struct sdp_info sdpinfo;
+
+	/* RFC 2327
+	 * v=0
+	 * o=- 6dca 1 IN IP4 192.168.100.17:2000
+	 * s=TV Das Erste
+	 * t=0 0
+	 * c=IN IP4 192.168.100.17/1
+	 * m=video 2000 http 33
+	 * a=tool:getstream
+	 * a=type:broadcast
+	 */
+
+	bzero(&sdpinfo, sizeof(struct sdp_info));
+
+	pos = sdp;
+	while(*pos != 0 && (pos-sdp) < len) {
+		if (*pos == 0x0d)
+			*pos = 0;
+
+		if (*pos == 0x0a) {
+			*pos = 0;
+
+			if (!strncasecmp("s=", sdp, 2)) {
+				sdpinfo.service = sdp + 2;
+			} else if (!strncasecmp("c=", sdp, 2)) {
+				int poscnt = 0;
+
+				sdp += 2;
+				while (*sdp != 0) {
+					if (poscnt == 2 && *sdp == '/') {
+						*sdp = 0;
+						break;
+					}
+
+					if (*sdp == ' ') {
+						*sdp = 0;
+						poscnt++;
+
+						/* c=<network type> <address type> <connection address> */
+						if (poscnt == 2)
+							sdpinfo.host = sdp + 1;
+
+						if (poscnt > 2)
+							break;
+					}
+					sdp++;
+				}
+			} else if (!strncasecmp("m=", sdp, 2)) {
+				int poscnt = 0;
+
+				sdp += 2;
+				while (*sdp != 0) {
+					if (*sdp == ' ') {
+						*sdp = 0;
+						poscnt++;
+
+						/* m=<media> <port> <transport> <fmt list> */
+						if (poscnt == 1)
+							sdpinfo.port = sdp + 1;
+
+						if (poscnt == 2)
+							sdpinfo.proto = sdp + 1;
+
+						if (poscnt > 2)
+							break;
+					}
+					sdp++;
+				}
+			}
+
+			sdp = ++pos;
+			continue;
+		}
+		pos++;
+	}
+
+	return &sdpinfo;
+}
+
+
 char *get_url_from_sap(char *service)
 {
 	struct timeval start, curr;
@@ -38,14 +129,15 @@ char *get_url_from_sap(char *service)
 
 	do {
 		int recvd;
+		fd_set rfds;
+		struct timeval tv;
+		int retval;
 		int sap_version, sap_addrtype, sap_messagetype, sap_encrypted, sap_compressed;
 		in_addr_t sender_address;
 		unsigned char auth_len;
 		unsigned short msgid;
-		unsigned char *payload, *pos, *host = NULL, *proto = NULL, *port = NULL, *sname = NULL;
-		fd_set rfds;
-		struct timeval tv;
-		int retval;
+		unsigned char *sdp;
+		struct sdp_info *sdpinfo;
 
 		FD_ZERO(&rfds);
 		FD_SET(fd, &rfds);
@@ -79,7 +171,7 @@ char *get_url_from_sap(char *service)
 		auth_len = buffer[1];
 		msgid = buffer[2] << 8 | buffer[3];
 		memcpy(&sender_address, buffer+4, (sap_addrtype?16:4));
-		payload = buffer + 4 /* (sap_*, auth_len, msgid) */ + (sap_addrtype?16:4) + auth_len;
+		sdp = buffer + 4 /* (sap_*, auth_len, msgid) */ + (sap_addrtype?16:4) + auth_len;
 
 #ifdef DEBUG
 		printf("\n");
@@ -104,104 +196,33 @@ char *get_url_from_sap(char *service)
 		if (sap_encrypted || sap_compressed)
 			continue;
 
-		/* RFC 2327
-		 * v=0
-		 * o=- 6dca 1 IN IP4 192.168.100.17:2000
-		 * s=TV Das Erste
-		 * t=0 0
-		 * c=IN IP4 192.168.100.17/1
-		 * m=video 2000 http 33
-		 * a=tool:getstream
-		 * a=type:broadcast
-		 */
-
-		pos = payload;
-		while(*pos != 0 && (pos-buffer) < recvd) {
-			if (*pos == 0x0d)
-				*pos = 0;
-
-			if (*pos == 0x0a) {
-				*pos = 0;
-
-				if (!strncasecmp("s=", payload, 2)) {
-					sname = payload + 2;
-				} else if (!strncasecmp("c=", payload, 2)) {
-					int poscnt = 0;
-
-					payload += 2;
-					while (*payload != 0) {
-						if (poscnt == 2 && *payload == '/') {
-							*payload = 0;
-							break;
-						}
-
-						if (*payload == ' ') {
-							*payload = 0;
-							poscnt++;
-
-							/* c=<network type> <address type> <connection address> */
-							if (poscnt == 2)
-								host = payload + 1;
-
-							if (poscnt > 2)
-								break;
-						}
-						payload++;
-					}
-				} else if (!strncasecmp("m=", payload, 2)) {
-					int poscnt = 0;
-
-					payload += 2;
-					while (*payload != 0) {
-						if (*payload == ' ') {
-							*payload = 0;
-							poscnt++;
-
-							/* m=<media> <port> <transport> <fmt list> */
-							if (poscnt == 1)
-								port = payload + 1;
-
-							if (poscnt == 2)
-								proto = payload + 1;
-
-							if (poscnt > 2)
-								break;
-						}
-						payload++;
-					}
-				}
-
-				payload = ++pos;
-				continue;
-			}
-			pos++;
-		}
+		sdpinfo = parse_sdp(sdp, recvd-(sdp-buffer));
 
-		if (sname && proto && port) {
-			if (!host) {
+		if (sdpinfo->service && sdpinfo->proto && sdpinfo->port) {
+			if (!sdpinfo->host) {
 				 struct in_addr inaddr;
 
 				 inaddr.s_addr = sender_address;
-				 host = inet_ntoa(inaddr);
+				 sdpinfo->host = inet_ntoa(inaddr);
 			}
 
 #ifdef DEBUG
-			printf("%s -> %s://%s:%s\n", sname, proto, host, port);
+			printf("%s -> %s://%s:%s\n", sdpinfo->service, sdpinfo->proto, sdpinfo->host, sdpinfo->port);
 #endif
 
-			if (strlen(service) < strlen(sname)) {
-				sname += strlen(sname) - strlen(service);
+			if (strlen(service) < strlen(sdpinfo->service)) {
+				sdpinfo->service += strlen(sdpinfo->service) - strlen(service);
 			}
 
-			if (!strncasecmp(service, sname, strlen(service))) {
-				int len = strlen(host)+strlen(proto)+strlen(port)+5;
+			if (!strncasecmp(service, sdpinfo->service, strlen(service))) {
+				int len = strlen(sdpinfo->host)+strlen(sdpinfo->proto)+strlen(sdpinfo->port)+5;
 
 				if (!(url = malloc(len))) {
 					perror("malloc");
 					return NULL;
 				}
 
-				snprintf(url, len, "%s://%s:%s", proto, host, port);
+				snprintf(url, len, "%s://%s:%s", sdpinfo->proto, sdpinfo->host, sdpinfo->port);
 				url[len-1] = 0;
 				break;
 			}