Add support for RTSP (RFC 2326) over TCP, and SDP (RFC 2327) inside

RTSP, from Jason Lango <jal@netapp.com>.

svn path=/trunk/; revision=340

1 files changed, 176 insertions, 0 deletions

diff --git a/packet-sdp.c b/packet-sdp.c
new file mode 100644
index 0000000000..25f5f28a83
--- /dev/null
+++ b/packet-sdp.c
@@ -0,0 +1,176 @@
+/* packet-sdp.c
+ * Routines for SDP packet disassembly
+ *
+ * Jason Lango <jal@netapp.com>
+ * Liberally copied from packet-http.c, by Guy Harris <guy@netapp.com>
+ *
+ * $Id: packet-sdp.c,v 1.1 1999/07/07 00:34:56 guy Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@zing.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ *
+ */
+
+#include "config.h"
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include <string.h>
+#include <ctype.h>
+
+#include <glib.h>
+#include "packet.h"
+
+void dissect_sdp(const u_char *pd, int offset, frame_data *fd,
+	proto_tree *tree)
+{
+	proto_tree	*sdp_tree;
+	proto_item	*ti;
+	const u_char	*data, *dataend;
+	const u_char	*lineend, *eol;
+	int		linelen;
+	u_char		section;
+	u_char		type;
+	const u_char	*value;
+	int		valuelen;
+	const char	*typename;
+
+	data = &pd[offset];
+	dataend = data + END_OF_FRAME;
+
+	if (check_col(fd, COL_PROTOCOL))
+		col_add_str(fd, COL_PROTOCOL, "SDP");
+
+	if (check_col(fd, COL_INFO)) {
+		/* XXX: Needs description. */
+		col_add_str(fd, COL_INFO, "Session Description");
+	}
+
+	if (!tree)
+		return;
+
+	ti = proto_tree_add_item(tree, offset, END_OF_FRAME,
+		"Session Description Protocol");
+	sdp_tree = proto_tree_new();
+	proto_item_add_subtree(ti, sdp_tree, ETT_SDP);
+
+	section = 0;
+	for (; data < dataend; offset += linelen, data = lineend) {
+		/*
+		 * Find the end of the line.
+		 */
+		lineend = find_line_end(data, dataend, &eol);
+		linelen = lineend - data;
+
+		/*
+		 * Line must contain at least e.g. "v=".
+		 */
+		if (linelen < 2)
+			break;
+
+		type = data[0];
+		if (data[1] != '=') {
+			proto_tree_add_item(sdp_tree, offset, linelen,
+				"Invalid line: %s",
+				format_text(data, linelen));
+			continue;
+		}
+		value = data + 2;
+		valuelen = linelen - 2;
+
+		/*
+		 * Attributes.
+		 */
+		switch (type) {
+		case 'v':
+			section = 'v';
+			typename = "Session Description, version";
+			break;
+		case 'o':
+			typename = "Owner/Creator, Session Id";
+			break;
+		case 's':
+			typename = "Session Name";
+			break;
+		case 'i':
+			if (section == 'v')
+				typename = "Session Information";
+			else if (section == 'm')
+				typename = "Media Title";
+			else
+				typename = "Misplaced";
+			break;
+		case 'u':
+			typename = "URI of Description";
+			break;
+		case 'e':
+			typename = "E-mail Address";
+			break;
+		case 'p':
+			typename = "Phone Number";
+			break;
+		case 'c':
+			typename = "Connection Information";
+			break;
+		case 'b':
+			typename = "Bandwidth Information";
+			break;
+		case 't':
+			section = 't';
+			typename = "Time Description, active time";
+			break;
+		case 'r':
+			typename = "Repeat Time";
+			break;
+		case 'm':
+			section = 'm';
+			typename = "Media Description, name and address";
+			break;
+		case 'k':
+			typename = "Encryption Key";
+			break;
+		case 'a':
+			if (section == 'v')
+				typename = "Session Attribute";
+			else if (section == 'm')
+				typename = "Media Attribute";
+			else
+				typename = "Misplaced";
+			break;
+		case 'z':
+			typename = "Time Zone Adjustment";
+			break;
+		default:
+			typename = "Unknown";
+			break;
+		}
+
+		proto_tree_add_item(sdp_tree, offset, linelen,
+			"%s (%c): %s", typename, type,
+			format_text(value, valuelen));
+	}
+
+	if (data < dataend) {
+		proto_tree_add_item(sdp_tree, offset, END_OF_FRAME,
+		    "Data (%d bytes)", END_OF_FRAME);
+	}
+}