/* GStreamer
* Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* SECTION:gstrtspdefs
* @title: GstRtspdefs
* @short_description: common RTSP defines
* @see_also: gstrtspurl, gstrtspconnection
*
* Provides common defines for the RTSP library.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include <string.h>
#include "gstrtspdefs.h"
#include <gst/gst.h>
struct rtsp_header
{
const gchar *name;
gboolean multiple;
};
static const gchar *rtsp_methods[] = {
"DESCRIBE",
"ANNOUNCE",
"GET_PARAMETER",
"OPTIONS",
"PAUSE",
"PLAY",
"RECORD",
"REDIRECT",
"SETUP",
"SET_PARAMETER",
"TEARDOWN",
"GET",
"POST",
NULL
};
static struct rtsp_header rtsp_headers[] = {
{"Accept", TRUE},
{"Accept-Encoding", TRUE},
{"Accept-Language", TRUE},
{"Allow", TRUE},
{"Authorization", FALSE},
{"Bandwidth", FALSE},
{"Blocksize", FALSE},
{"Cache-Control", TRUE},
{"Conference", FALSE},
{"Connection", TRUE},
{"Content-Base", FALSE},
{"Content-Encoding", TRUE},
{"Content-Language", TRUE},
{"Content-Length", FALSE},
{"Content-Location", FALSE},
{"Content-Type", FALSE},
{"CSeq", FALSE},
{"Date", FALSE},
{"Expires", FALSE},
{"From", FALSE},
{"If-Modified-Since", FALSE},
{"Last-Modified", FALSE},
{"Proxy-Authenticate", TRUE},
{"Proxy-Require", TRUE},
{"Public", TRUE},
{"Range", FALSE},
{"Referer", FALSE},
{"Require", TRUE},
{"Retry-After", FALSE},
{"RTP-Info", TRUE},
{"Scale", FALSE},
{"Session", FALSE},
{"Server", FALSE},
{"Speed", FALSE},
{"Transport", TRUE},
{"Unsupported", FALSE},
{"User-Agent", FALSE},
{"Via", TRUE},
{"WWW-Authenticate", TRUE},
/* Real extensions */
{"ClientChallenge", FALSE},
{"RealChallenge1", FALSE},
{"RealChallenge2", FALSE},
{"RealChallenge3", FALSE},
{"Subscribe", FALSE},
{"Alert", FALSE},
{"ClientID", FALSE},
{"CompanyID", FALSE},
{"GUID", FALSE},
{"RegionData", FALSE},
{"SupportsMaximumASMBandwidth", FALSE},
{"Language", FALSE},
{"PlayerStarttime", FALSE},
{"Location", FALSE},
{"ETag", FALSE},
{"If-Match", TRUE},
/* WM extensions [MS-RTSP] */
{"Accept-Charset", TRUE},
{"Supported", TRUE},
{"Vary", TRUE},
{"X-Accelerate-Streaming", FALSE},
{"X-Accept-Authentication", FALSE},
{"X-Accept-Proxy-Authentication", FALSE},
{"X-Broadcast-Id", FALSE},
{"X-Burst-Streaming", FALSE},
{"X-Notice", FALSE},
{"X-Player-Lag-Time", FALSE},
{"X-Playlist", FALSE},
{"X-Playlist-Change-Notice", FALSE},
{"X-Playlist-Gen-Id", FALSE},
{"X-Playlist-Seek-Id", FALSE},
{"X-Proxy-Client-Agent", FALSE},
{"X-Proxy-Client-Verb", FALSE},
{"X-Receding-PlaylistChange", FALSE},
{"X-RTP-Info", FALSE},
{"X-StartupProfile", FALSE},
{"Timestamp", FALSE},
{"Authentication-Info", FALSE},
{"Host", FALSE},
{"Pragma", TRUE},
{"X-Server-IP-Address", FALSE},
{"x-sessioncookie", FALSE},
{"RTCP-Interval", FALSE},
/* Since 1.4 */
{"KeyMgmt", FALSE},
/* Since 1.14 */
{"Pipelined-Requests", FALSE},
{"Media-Properties", FALSE},
{"Seek-Style", FALSE},
{"Accept-Ranges", FALSE},
{NULL, FALSE}
};
#define DEF_STATUS(c, t) \
g_hash_table_insert (statuses, GUINT_TO_POINTER(c), (gpointer) t)
static GHashTable *
rtsp_init_status (void)
{
GHashTable *statuses = g_hash_table_new (NULL, NULL);
DEF_STATUS (GST_RTSP_STS_CONTINUE, "Continue");
DEF_STATUS (GST_RTSP_STS_OK, "OK");
DEF_STATUS (GST_RTSP_STS_CREATED, "Created");
DEF_STATUS (GST_RTSP_STS_LOW_ON_STORAGE, "Low on Storage Space");
DEF_STATUS (GST_RTSP_STS_MULTIPLE_CHOICES, "Multiple Choices");
DEF_STATUS (GST_RTSP_STS_MOVED_PERMANENTLY, "Moved Permanently");
DEF_STATUS (GST_RTSP_STS_MOVE_TEMPORARILY, "Move Temporarily");
DEF_STATUS (GST_RTSP_STS_SEE_OTHER, "See Other");
DEF_STATUS (GST_RTSP_STS_NOT_MODIFIED, "Not Modified");
DEF_STATUS (GST_RTSP_STS_USE_PROXY, "Use Proxy");
DEF_STATUS (GST_RTSP_STS_BAD_REQUEST, "Bad Request");
DEF_STATUS (GST_RTSP_STS_UNAUTHORIZED, "Unauthorized");
DEF_STATUS (GST_RTSP_STS_PAYMENT_REQUIRED, "Payment Required");
DEF_STATUS (GST_RTSP_STS_FORBIDDEN, "Forbidden");
DEF_STATUS (GST_RTSP_STS_NOT_FOUND, "Not Found");
DEF_STATUS (GST_RTSP_STS_METHOD_NOT_ALLOWED, "Method Not Allowed");
DEF_STATUS (GST_RTSP_STS_NOT_ACCEPTABLE, "Not Acceptable");
DEF_STATUS (GST_RTSP_STS_PROXY_AUTH_REQUIRED,
"Proxy Authentication Required");
DEF_STATUS (GST_RTSP_STS_REQUEST_TIMEOUT, "Request Time-out");
DEF_STATUS (GST_RTSP_STS_GONE, "Gone");
DEF_STATUS (GST_RTSP_STS_LENGTH_REQUIRED, "Length Required");
DEF_STATUS (GST_RTSP_STS_PRECONDITION_FAILED, "Precondition Failed");
DEF_STATUS (GST_RTSP_STS_REQUEST_ENTITY_TOO_LARGE,
"Request Entity Too Large");
DEF_STATUS (GST_RTSP_STS_REQUEST_URI_TOO_LARGE, "Request-URI Too Large");
DEF_STATUS (GST_RTSP_STS_UNSUPPORTED_MEDIA_TYPE, "Unsupported Media Type");
DEF_STATUS (GST_RTSP_STS_PARAMETER_NOT_UNDERSTOOD,
"Parameter Not Understood");
DEF_STATUS (GST_RTSP_STS_CONFERENCE_NOT_FOUND, "Conference Not Found");
DEF_STATUS (GST_RTSP_STS_NOT_ENOUGH_BANDWIDTH, "Not Enough Bandwidth");
DEF_STATUS (GST_RTSP_STS_SESSION_NOT_FOUND, "Session Not Found");
DEF_STATUS (GST_RTSP_STS_METHOD_NOT_VALID_IN_THIS_STATE,
"Method Not Valid in This State");
DEF_STATUS (GST_RTSP_STS_HEADER_FIELD_NOT_VALID_FOR_RESOURCE,
"Header Field Not Valid for Resource");
DEF_STATUS (GST_RTSP_STS_INVALID_RANGE, "Invalid Range");
DEF_STATUS (GST_RTSP_STS_PARAMETER_IS_READONLY, "Parameter Is Read-Only");
DEF_STATUS (GST_RTSP_STS_AGGREGATE_OPERATION_NOT_ALLOWED,
"Aggregate operation not allowed");
DEF_STATUS (GST_RTSP_STS_ONLY_AGGREGATE_OPERATION_ALLOWED,
"Only aggregate operation allowed");
DEF_STATUS (GST_RTSP_STS_UNSUPPORTED_TRANSPORT, "Unsupported transport");
DEF_STATUS (GST_RTSP_STS_DESTINATION_UNREACHABLE, "Destination unreachable");
DEF_STATUS (GST_RTSP_STS_KEY_MANAGEMENT_FAILURE, "Key management failure");
DEF_STATUS (GST_RTSP_STS_INTERNAL_SERVER_ERROR, "Internal Server Error");
DEF_STATUS (GST_RTSP_STS_NOT_IMPLEMENTED, "Not Implemented");
DEF_STATUS (GST_RTSP_STS_BAD_GATEWAY, "Bad Gateway");
DEF_STATUS (GST_RTSP_STS_SERVICE_UNAVAILABLE, "Service Unavailable");
DEF_STATUS (GST_RTSP_STS_GATEWAY_TIMEOUT, "Gateway Time-out");
DEF_STATUS (GST_RTSP_STS_RTSP_VERSION_NOT_SUPPORTED,
"RTSP Version not supported");
DEF_STATUS (GST_RTSP_STS_OPTION_NOT_SUPPORTED, "Option not supported");
return statuses;
}
/**
* gst_rtsp_strresult:
* @result: a #GstRTSPResult
*
* Convert @result in a human readable string.
*
* Returns: a newly allocated string. g_free() after usage.
*/
gchar *
gst_rtsp_strresult (GstRTSPResult result)
{
switch (result) {
case GST_RTSP_OK:
return g_strdup ("OK");
case GST_RTSP_ESYS:
return g_strdup ("System error");
case GST_RTSP_ENET:
return g_strdup ("Network error");
case GST_RTSP_ERROR:
return g_strdup ("Generic error");
case GST_RTSP_EINVAL:
return g_strdup ("Invalid parameter specified");
case GST_RTSP_EINTR:
return g_strdup ("Operation interrupted");
case GST_RTSP_ENOMEM:
return g_strdup ("Out of memory");
case GST_RTSP_ERESOLV:
return g_strdup ("Cannot resolve host");
case GST_RTSP_ENOTIMPL:
return g_strdup ("Function not implemented");
case GST_RTSP_EPARSE:
return g_strdup ("Parse error");
case GST_RTSP_EWSASTART:
return g_strdup ("Error on WSAStartup");
case GST_RTSP_EWSAVERSION:
return g_strdup ("Windows sockets are not version 0x202");
case GST_RTSP_EEOF:
return g_strdup ("Received end-of-file");
case GST_RTSP_ENOTIP:
return g_strdup ("Host is not a valid IP address");
case GST_RTSP_ETIMEOUT:
return g_strdup ("Timeout while waiting for server response");
case GST_RTSP_ETGET:
return g_strdup ("Tunnel GET request received");
case GST_RTSP_ETPOST:
return g_strdup ("Tunnel POST request received");
case GST_RTSP_ELAST:
default:
return g_strdup_printf ("Unknown error (%d)", result);
}
}
/**
* gst_rtsp_method_as_text:
* @method: a #GstRTSPMethod
*
* Convert @method to a string.
*
* Returns: a string representation of @method.
*/
const gchar *
gst_rtsp_method_as_text (GstRTSPMethod method)
{
gint i;
if (method == GST_RTSP_INVALID)
return NULL;
i = 0;
while ((method & 1) == 0) {
i++;
method >>= 1;
}
return rtsp_methods[i];
}
/**
* gst_rtsp_version_as_text:
* @version: a #GstRTSPVersion
*
* Convert @version to a string.
*
* Returns: a string representation of @version.
*/
const gchar *
gst_rtsp_version_as_text (GstRTSPVersion version)
{
switch (version) {
case GST_RTSP_VERSION_1_0:
return "1.0";
case GST_RTSP_VERSION_1_1:
return "1.1";
case GST_RTSP_VERSION_2_0:
return "2.0";
default:
return "0.0";
}
}
/**
* gst_rtsp_header_as_text:
* @field: a #GstRTSPHeaderField
*
* Convert @field to a string.
*
* Returns: a string representation of @field.
*/
const gchar *
gst_rtsp_header_as_text (GstRTSPHeaderField field)
{
if (field == GST_RTSP_HDR_INVALID)
return NULL;
else
return rtsp_headers[field - 1].name;
}
/**
* gst_rtsp_status_as_text:
* @code: a #GstRTSPStatusCode
*
* Convert @code to a string.
*
* Returns: a string representation of @code.
*/
const gchar *
gst_rtsp_status_as_text (GstRTSPStatusCode code)
{
static GHashTable *statuses;
if (G_UNLIKELY (statuses == NULL))
statuses = rtsp_init_status ();
return g_hash_table_lookup (statuses, GUINT_TO_POINTER (code));
}
/**
* gst_rtsp_find_header_field:
* @header: a header string
*
* Convert @header to a #GstRTSPHeaderField.
*
* Returns: a #GstRTSPHeaderField for @header or #GST_RTSP_HDR_INVALID if the
* header field is unknown.
*/
GstRTSPHeaderField
gst_rtsp_find_header_field (const gchar * header)
{
gint idx;
for (idx = 0; rtsp_headers[idx].name; idx++) {
if (g_ascii_strcasecmp (rtsp_headers[idx].name, header) == 0) {
return idx + 1;
}
}
return GST_RTSP_HDR_INVALID;
}
/**
* gst_rtsp_find_method:
* @method: a method
*
* Convert @method to a #GstRTSPMethod.
*
* Returns: a #GstRTSPMethod for @method or #GST_RTSP_INVALID if the
* method is unknown.
*/
GstRTSPMethod
gst_rtsp_find_method (const gchar * method)
{
gint idx;
for (idx = 0; rtsp_methods[idx]; idx++) {
if (g_ascii_strcasecmp (rtsp_methods[idx], method) == 0) {
return (1 << idx);
}
}
return GST_RTSP_INVALID;
}
/**
* gst_rtsp_options_as_text:
* @options: one or more #GstRTSPMethod
*
* Convert @options to a string.
*
* Returns: a new string of @options. g_free() after usage.
*/
gchar *
gst_rtsp_options_as_text (GstRTSPMethod options)
{
GString *str;
str = g_string_new ("");
if (options & GST_RTSP_OPTIONS)
g_string_append (str, "OPTIONS, ");
if (options & GST_RTSP_DESCRIBE)
g_string_append (str, "DESCRIBE, ");
if (options & GST_RTSP_ANNOUNCE)
g_string_append (str, "ANNOUNCE, ");
if (options & GST_RTSP_GET_PARAMETER)
g_string_append (str, "GET_PARAMETER, ");
if (options & GST_RTSP_PAUSE)
g_string_append (str, "PAUSE, ");
if (options & GST_RTSP_PLAY)
g_string_append (str, "PLAY, ");
if (options & GST_RTSP_RECORD)
g_string_append (str, "RECORD, ");
if (options & GST_RTSP_REDIRECT)
g_string_append (str, "REDIRECT, ");
if (options & GST_RTSP_SETUP)
g_string_append (str, "SETUP, ");
if (options & GST_RTSP_SET_PARAMETER)
g_string_append (str, "SET_PARAMETER, ");
if (options & GST_RTSP_TEARDOWN)
g_string_append (str, "TEARDOWN, ");
/* remove trailing ", " if there is one */
if (str->len > 2)
str = g_string_truncate (str, str->len - 2);
return g_string_free (str, FALSE);
}
/**
* gst_rtsp_options_from_text:
* @options: a comma separated list of options
*
* Convert the comma separated list @options to a #GstRTSPMethod bitwise or
* of methods. This functions is the reverse of gst_rtsp_options_as_text().
*
* Returns: a #GstRTSPMethod
*
* Since: 1.2
*/
GstRTSPMethod
gst_rtsp_options_from_text (const gchar * options)
{
GstRTSPMethod methods;
gchar **ostr;
gint i;
/* The string is like:
* OPTIONS, DESCRIBE, ANNOUNCE, PLAY, SETUP, ...
*/
ostr = g_strsplit (options, ",", 0);
methods = 0;
for (i = 0; ostr[i]; i++) {
gchar *stripped;
GstRTSPMethod method;
stripped = g_strstrip (ostr[i]);
method = gst_rtsp_find_method (stripped);
/* keep bitfield of supported methods */
if (method != GST_RTSP_INVALID)
methods |= method;
}
g_strfreev (ostr);
return methods;
}
/**
* gst_rtsp_header_allow_multiple:
* @field: a #GstRTSPHeaderField
*
* Check whether @field may appear multiple times in a message.
*
* Returns: %TRUE if multiple headers are allowed.
*/
gboolean
gst_rtsp_header_allow_multiple (GstRTSPHeaderField field)
{
if (field == GST_RTSP_HDR_INVALID)
return FALSE;
else
return rtsp_headers[field - 1].multiple;
}
/* See RFC2069, 2.1.2 */
static gchar *
auth_digest_compute_response_md5 (const gchar * method, const gchar * realm,
const gchar * username, const gchar * password, const gchar * uri,
const gchar * nonce)
{
gchar hex_a1[33] = { 0, };
gchar hex_a2[33] = { 0, };
GChecksum *md5_context = g_checksum_new (G_CHECKSUM_MD5);
const gchar *digest_string;
gchar *response;
/* Compute A1 */
g_checksum_update (md5_context, (const guchar *) username, strlen (username));
g_checksum_update (md5_context, (const guchar *) ":", 1);
g_checksum_update (md5_context, (const guchar *) realm, strlen (realm));
g_checksum_update (md5_context, (const guchar *) ":", 1);
g_checksum_update (md5_context, (const guchar *) password, strlen (password));
digest_string = g_checksum_get_string (md5_context);
g_assert (strlen (digest_string) == 32);
memcpy (hex_a1, digest_string, 32);
g_checksum_reset (md5_context);
/* compute A2 */
g_checksum_update (md5_context, (const guchar *) method, strlen (method));
g_checksum_update (md5_context, (const guchar *) ":", 1);
g_checksum_update (md5_context, (const guchar *) uri, strlen (uri));
digest_string = g_checksum_get_string (md5_context);
g_assert (strlen (digest_string) == 32);
memcpy (hex_a2, digest_string, 32);
/* compute KD */
g_checksum_reset (md5_context);
g_checksum_update (md5_context, (const guchar *) hex_a1, strlen (hex_a1));
g_checksum_update (md5_context, (const guchar *) ":", 1);
g_checksum_update (md5_context, (const guchar *) nonce, strlen (nonce));
g_checksum_update (md5_context, (const guchar *) ":", 1);
g_checksum_update (md5_context, (const guchar *) hex_a2, 32);
response = g_strdup (g_checksum_get_string (md5_context));
g_checksum_free (md5_context);
return response;
}
/**
* gst_rtsp_generate_digest_auth_response:
* @algorithm: (allow-none): Hash algorithm to use, or %NULL for MD5
* @method: Request method, e.g. PLAY
* @realm: Realm
* @username: Username
* @password: Password
* @uri: Original request URI
* @nonce: Nonce
*
* Calculates the digest auth response from the values given by the server and
* the username and password. See RFC2069 for details.
*
* Currently only supported algorithm "md5".
*
* Returns: Authentication response or %NULL if unsupported
*
* Since: 1.12
*/
gchar *
gst_rtsp_generate_digest_auth_response (const gchar * algorithm,
const gchar * method, const gchar * realm, const gchar * username,
const gchar * password, const gchar * uri, const gchar * nonce)
{
g_return_val_if_fail (method != NULL, NULL);
g_return_val_if_fail (realm != NULL, NULL);
g_return_val_if_fail (username != NULL, NULL);
g_return_val_if_fail (password != NULL, NULL);
g_return_val_if_fail (uri != NULL, NULL);
g_return_val_if_fail (nonce != NULL, NULL);
if (algorithm == NULL || g_ascii_strcasecmp (algorithm, "md5") == 0)
return auth_digest_compute_response_md5 (method, realm, username, password,
uri, nonce);
return NULL;
}