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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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65f953cd23
gst_rtsp_url_get_request_uri returns rtsp://... url when requested url is rtsps://, this is not in accordance with https://www.rfc-editor.org/rfc/rfc7826.html#section-19.2. This also impedes setting up a rtsps session with a live555 rtsp server. Don't expose other than rtsp and rtsps internal gstreamer rtsp url schemes to avoid regression: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/2412 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4294>
453 lines
12 KiB
C
453 lines
12 KiB
C
/* GStreamer
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* Copyright (C) <2005,2006> Wim Taymans <wim@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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* Unless otherwise indicated, Source Code is licensed under MIT license.
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* See further explanation attached in License Statement (distributed in the file
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* LICENSE).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/**
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* SECTION:gstrtspurl
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* @title: GstRTSPUrl
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* @short_description: handling RTSP urls
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*
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* Provides helper functions to handle RTSP urls.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "gstrtspurl.h"
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G_DEFINE_BOXED_TYPE (GstRTSPUrl, gst_rtsp_url,
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(GBoxedCopyFunc) gst_rtsp_url_copy, (GBoxedFreeFunc) gst_rtsp_url_free);
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#define SCHEME_SIZE 7
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static const struct
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{
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const char scheme[SCHEME_SIZE];
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GstRTSPLowerTrans transports;
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} rtsp_schemes_map[] = {
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{
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"rtsp", GST_RTSP_LOWER_TRANS_TCP | GST_RTSP_LOWER_TRANS_UDP |
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GST_RTSP_LOWER_TRANS_UDP_MCAST}, {
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"rtspu", GST_RTSP_LOWER_TRANS_UDP | GST_RTSP_LOWER_TRANS_UDP_MCAST}, {
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"rtspt", GST_RTSP_LOWER_TRANS_TCP}, {
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"rtsph", GST_RTSP_LOWER_TRANS_HTTP | GST_RTSP_LOWER_TRANS_TCP}, {
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"rtsps", GST_RTSP_LOWER_TRANS_TCP | GST_RTSP_LOWER_TRANS_UDP |
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GST_RTSP_LOWER_TRANS_UDP_MCAST | GST_RTSP_LOWER_TRANS_TLS}, {
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"rtspsu",
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GST_RTSP_LOWER_TRANS_UDP | GST_RTSP_LOWER_TRANS_UDP_MCAST |
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GST_RTSP_LOWER_TRANS_TLS}, {
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"rtspst", GST_RTSP_LOWER_TRANS_TCP | GST_RTSP_LOWER_TRANS_TLS}, {
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"rtspsh",
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GST_RTSP_LOWER_TRANS_HTTP | GST_RTSP_LOWER_TRANS_TCP |
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GST_RTSP_LOWER_TRANS_TLS}
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};
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/* format is rtsp[u]://[user:passwd@]host[:port]/abspath[?query] where host
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* is a host name, an IPv4 dotted decimal address ("aaa.bbb.ccc.ddd") or an
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* [IPv6] address ("[aabb:ccdd:eeff:gghh::sstt]" note the brackets around the
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* address to allow the distinction between ':' as an IPv6 hexgroup separator
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* and as a host/port separator) */
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/**
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* gst_rtsp_url_parse:
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* @urlstr: the url string to parse
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* @url: (out) (transfer full) (nullable): location to hold the result.
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*
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* Parse the RTSP @urlstr into a newly allocated #GstRTSPUrl. Free after usage
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* with gst_rtsp_url_free().
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*
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* Returns: a #GstRTSPResult.
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*/
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GstRTSPResult
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gst_rtsp_url_parse (const gchar * urlstr, GstRTSPUrl ** url)
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{
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GstRTSPUrl *res;
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gchar *p, *delim, *at, *col;
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gchar *host_end = NULL;
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guint i;
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g_return_val_if_fail (urlstr != NULL, GST_RTSP_EINVAL);
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g_return_val_if_fail (url != NULL, GST_RTSP_EINVAL);
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*url = NULL;
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res = g_new0 (GstRTSPUrl, 1);
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p = (gchar *) urlstr;
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col = strstr (p, "://");
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if (col == NULL)
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goto invalid;
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for (i = 0; i < G_N_ELEMENTS (rtsp_schemes_map); i++) {
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if (g_ascii_strncasecmp (rtsp_schemes_map[i].scheme, p, col - p) == 0) {
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res->transports = rtsp_schemes_map[i].transports;
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p = col + 3;
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break;
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}
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}
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if (res->transports == GST_RTSP_LOWER_TRANS_UNKNOWN)
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goto invalid;
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delim = strpbrk (p, "/?");
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at = strchr (p, '@');
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if (at && delim && at > delim)
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at = NULL;
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if (at) {
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col = strchr (p, ':');
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/* must have a ':' and it must be before the '@' */
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if (col == NULL || col > at)
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goto invalid;
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res->user = g_uri_unescape_segment (p, col, NULL);
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col++;
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res->passwd = g_uri_unescape_segment (col, at, NULL);
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/* move to host */
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p = at + 1;
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}
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if (*p == '[') {
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res->family = GST_RTSP_FAM_INET6;
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/* we have an IPv6 address in the URL, find the ending ] which must be
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* before any delimiter */
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host_end = strchr (++p, ']');
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if (!host_end || (delim && host_end >= delim))
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goto invalid;
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/* a port specifier must follow the address immediately */
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col = host_end[1] == ':' ? host_end + 1 : NULL;
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} else {
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res->family = GST_RTSP_FAM_INET;
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col = strchr (p, ':');
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/* we have a ':' and a delimiter but the ':' is after the delimiter, it's
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* not really part of the hostname */
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if (col && delim && col >= delim)
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col = NULL;
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host_end = col ? col : delim;
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}
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if (!host_end)
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res->host = g_strdup (p);
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else {
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res->host = g_strndup (p, host_end - p);
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if (col) {
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res->port = strtoul (col + 1, NULL, 10);
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} else {
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/* no port specified, set to 0. gst_rtsp_url_get_port() will return the
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* default port */
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res->port = 0;
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}
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}
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p = delim;
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if (p && *p == '/') {
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delim = strchr (p, '?');
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if (!delim)
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res->abspath = g_strdup (p);
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else
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res->abspath = g_strndup (p, delim - p);
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p = delim;
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} else {
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/* IQinVision IQeye 1080p fails if a path '/' is provided
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* and RTSP does not mandate that a non-zero-length path
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* must be used */
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res->abspath = g_strdup ("");
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}
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if (p && *p == '?')
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res->query = g_strdup (p + 1);
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*url = res;
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return GST_RTSP_OK;
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/* ERRORS */
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invalid:
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{
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gst_rtsp_url_free (res);
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return GST_RTSP_EINVAL;
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}
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}
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/**
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* gst_rtsp_url_copy:
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* @url: a #GstRTSPUrl
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*
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* Make a copy of @url.
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*
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* Returns: (transfer full): a copy of @url. Free with gst_rtsp_url_free () after usage.
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*/
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GstRTSPUrl *
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gst_rtsp_url_copy (const GstRTSPUrl * url)
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{
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GstRTSPUrl *res;
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g_return_val_if_fail (url != NULL, NULL);
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res = g_new0 (GstRTSPUrl, 1);
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res->transports = url->transports;
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res->family = url->family;
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res->user = g_strdup (url->user);
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res->passwd = g_strdup (url->passwd);
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res->host = g_strdup (url->host);
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res->port = url->port;
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res->abspath = g_strdup (url->abspath);
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res->query = g_strdup (url->query);
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return res;
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}
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/**
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* gst_rtsp_url_free:
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* @url: a #GstRTSPUrl
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*
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* Free the memory used by @url.
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*/
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void
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gst_rtsp_url_free (GstRTSPUrl * url)
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{
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if (url == NULL)
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return;
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g_free (url->user);
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g_free (url->passwd);
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g_free (url->host);
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g_free (url->abspath);
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g_free (url->query);
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g_free (url);
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}
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/**
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* gst_rtsp_url_set_port:
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* @url: a #GstRTSPUrl
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* @port: the port
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*
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* Set the port number in @url to @port.
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*
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* Returns: #GST_RTSP_OK.
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*/
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GstRTSPResult
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gst_rtsp_url_set_port (GstRTSPUrl * url, guint16 port)
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{
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g_return_val_if_fail (url != NULL, GST_RTSP_EINVAL);
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url->port = port;
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return GST_RTSP_OK;
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}
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/**
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* gst_rtsp_url_get_port:
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* @url: a #GstRTSPUrl
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* @port: (out): location to hold the port
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*
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* Get the port number of @url.
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*
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* Returns: #GST_RTSP_OK.
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*/
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GstRTSPResult
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gst_rtsp_url_get_port (const GstRTSPUrl * url, guint16 * port)
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{
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g_return_val_if_fail (url != NULL, GST_RTSP_EINVAL);
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g_return_val_if_fail (port != NULL, GST_RTSP_EINVAL);
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/* if a port was specified, use that else use the default port. */
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if (url->port != 0)
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*port = url->port;
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else
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*port = GST_RTSP_DEFAULT_PORT;
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return GST_RTSP_OK;
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}
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/**
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* gst_rtsp_url_get_request_uri:
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* @url: a #GstRTSPUrl
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*
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* Get a newly allocated string describing the request URI for @url.
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*
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* Returns: (transfer full): a string with the request URI. g_free() after usage.
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*/
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gchar *
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gst_rtsp_url_get_request_uri (const GstRTSPUrl * url)
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{
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gchar *uri;
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const gchar *pre_host;
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const gchar *post_host;
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const gchar *pre_query;
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const gchar *query;
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gchar scheme[SCHEME_SIZE] = "rtsp";
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g_return_val_if_fail (url != NULL, NULL);
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pre_host = url->family == GST_RTSP_FAM_INET6 ? "[" : "";
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post_host = url->family == GST_RTSP_FAM_INET6 ? "]" : "";
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pre_query = url->query ? "?" : "";
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query = url->query ? url->query : "";
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if (url->transports & GST_RTSP_LOWER_TRANS_TLS)
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g_strlcpy (scheme, "rtsps", SCHEME_SIZE);
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if (url->port != 0) {
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uri = g_strdup_printf ("%s://%s%s%s:%u%s%s%s", scheme, pre_host, url->host,
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post_host, url->port, url->abspath, pre_query, query);
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} else {
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uri = g_strdup_printf ("%s://%s%s%s%s%s%s", scheme, pre_host, url->host,
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post_host, url->abspath, pre_query, query);
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}
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return uri;
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}
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/**
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* gst_rtsp_url_get_request_uri_with_control:
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* @url: a #GstRTSPUrl
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* @control_path: an RTSP aggregate control path
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*
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* Get a newly allocated string describing the request URI for @url
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* combined with the control path for @control_path
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*
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* Returns: (transfer full): a string with the request URI combined with the control path.
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* g_free() after usage.
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*
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* Since: 1.18
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*/
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gchar *
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gst_rtsp_url_get_request_uri_with_control (const GstRTSPUrl * url,
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const gchar * control_path)
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{
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gchar *url_string;
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gchar *uri;
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g_return_val_if_fail (url != NULL, NULL);
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/* FIXME: Use GUri here once we can depend on GLib 2.66 */
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url_string = gst_rtsp_url_get_request_uri (url);
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uri = gst_uri_join_strings (url_string, control_path);
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g_clear_pointer (&url_string, g_free);
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return uri;
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}
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static int
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hex_to_int (gchar c)
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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else if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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else if (c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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else
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return -1;
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}
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static void
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unescape_path_component (gchar * comp)
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{
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guint len = strlen (comp);
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guint i;
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for (i = 0; i + 2 < len; i++)
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if (comp[i] == '%') {
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int a, b;
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a = hex_to_int (comp[i + 1]);
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b = hex_to_int (comp[i + 2]);
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/* The a||b check is to ensure that the byte is not '\0' */
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if (a >= 0 && b >= 0 && (a || b)) {
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comp[i] = (gchar) (a * 16 + b);
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memmove (comp + i + 1, comp + i + 3, len - i - 3);
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len -= 2;
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comp[len] = '\0';
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}
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}
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}
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/**
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* gst_rtsp_url_decode_path_components:
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* @url: a #GstRTSPUrl
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*
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* Splits the path of @url on '/' boundaries, decoding the resulting components,
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*
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* The decoding performed by this routine is "URI decoding", as defined in RFC
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* 3986, commonly known as percent-decoding. For example, a string "foo\%2fbar"
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* will decode to "foo/bar" -- the \%2f being replaced by the corresponding byte
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* with hex value 0x2f. Note that there is no guarantee that the resulting byte
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* sequence is valid in any given encoding. As a special case, \%00 is not
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* unescaped to NUL, as that would prematurely terminate the string.
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*
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* Also note that since paths usually start with a slash, the first component
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* will usually be the empty string.
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*
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* Returns: (transfer full): %NULL-terminated array of URL components. Free with
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* g_strfreev() when no longer needed.
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*/
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gchar **
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gst_rtsp_url_decode_path_components (const GstRTSPUrl * url)
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{
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gchar **ret;
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guint i;
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g_return_val_if_fail (url != NULL, NULL);
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g_return_val_if_fail (url->abspath != NULL, NULL);
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ret = g_strsplit (url->abspath, "/", -1);
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for (i = 0; ret[i]; i++)
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unescape_path_component (ret[i]);
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return ret;
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}
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