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Add RTSP tunneling over HTTP
Patch by Josh Allmann, joshua dot allmann at gmail dot com Originally committed as revision 23536 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Josh Allmann
Martin Storsjö
parent
a26c3c211e
commit
f5d33f5241
@ -22,6 +22,7 @@
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#include "libavutil/base64.h"
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#include "libavutil/avstring.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/random_seed.h"
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#include "avformat.h"
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#include <sys/time.h>
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@ -32,6 +33,7 @@
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#include "internal.h"
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#include "network.h"
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#include "os_support.h"
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#include "http.h"
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#include "rtsp.h"
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#include "rtpdec.h"
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@ -1008,8 +1010,11 @@ int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
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int send_content_length)
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{
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RTSPState *rt = s->priv_data;
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char buf[4096];
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char buf[4096], *out_buf;
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char base64buf[AV_BASE64_SIZE(sizeof(buf))];
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/* Add in RTSP headers */
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out_buf = buf;
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rt->seq++;
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snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
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if (headers)
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@ -1030,11 +1035,23 @@ int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
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av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
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av_strlcat(buf, "\r\n", sizeof(buf));
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/* base64 encode rtsp if tunneling */
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if (rt->control_transport == RTSP_MODE_TUNNEL) {
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av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
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out_buf = base64buf;
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}
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dprintf(s, "Sending:\n%s--\n", buf);
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url_write(rt->rtsp_hd_out, buf, strlen(buf));
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if (send_content_length > 0 && send_content)
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url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
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if (send_content_length > 0 && send_content) {
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if (rt->control_transport == RTSP_MODE_TUNNEL) {
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av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
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"with content data not supported\n");
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return AVERROR_PATCHWELCOME;
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}
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url_write(rt->rtsp_hd_out, send_content, send_content_length);
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}
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rt->last_cmd_time = av_gettime();
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return 0;
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@ -1485,6 +1502,7 @@ int ff_rtsp_connect(AVFormatContext *s)
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if (!ff_network_init())
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return AVERROR(EIO);
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redirect:
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rt->control_transport = RTSP_MODE_PLAIN;
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/* extract hostname and port */
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ff_url_split(NULL, 0, auth, sizeof(auth),
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host, sizeof(host), &port, path, sizeof(path), s->filename);
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@ -1514,6 +1532,9 @@ redirect:
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lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
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} else if (!strcmp(option, "tcp")) {
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lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
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} else if(!strcmp(option, "http")) {
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lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
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rt->control_transport = RTSP_MODE_TUNNEL;
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} else {
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/* Write options back into the buffer, using memmove instead
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* of strcpy since the strings may overlap. */
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@ -1533,7 +1554,7 @@ redirect:
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/* Only UDP or TCP - UDP multicast isn't supported. */
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lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
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(1 << RTSP_LOWER_TRANSPORT_TCP);
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if (!lower_transport_mask) {
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if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
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av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
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"only UDP and TCP are supported for output.\n");
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err = AVERROR(EINVAL);
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@ -1547,6 +1568,56 @@ redirect:
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ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
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host, port, "%s", path);
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if (rt->control_transport == RTSP_MODE_TUNNEL) {
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/* set up initial handshake for tunneling */
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char httpname[1024];
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char sessioncookie[17];
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char headers[1024];
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ff_url_join(httpname, sizeof(httpname), "http", NULL, host, port, "%s", path);
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snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
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av_get_random_seed(), av_get_random_seed());
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/* GET requests */
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if (url_open(&rtsp_hd, httpname, URL_RDONLY) < 0) {
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err = AVERROR(EIO);
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goto fail;
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}
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/* generate GET headers */
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snprintf(headers, sizeof(headers),
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"x-sessioncookie: %s\r\n"
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"Accept: application/x-rtsp-tunnelled\r\n"
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"Pragma: no-cache\r\n"
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"Cache-Control: no-cache\r\n",
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sessioncookie);
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ff_http_set_headers(rtsp_hd, headers);
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/* complete the connection */
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if (url_read(rtsp_hd, NULL, 0)) {
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err = AVERROR(EIO);
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goto fail;
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}
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/* POST requests */
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if (url_open(&rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
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err = AVERROR(EIO);
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goto fail;
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}
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/* generate POST headers */
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snprintf(headers, sizeof(headers),
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"x-sessioncookie: %s\r\n"
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"Content-Type: application/x-rtsp-tunnelled\r\n"
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"Pragma: no-cache\r\n"
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"Cache-Control: no-cache\r\n"
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"Content-Length: 32767\r\n"
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"Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
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sessioncookie);
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ff_http_set_headers(rtsp_hd_out, headers);
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ff_http_set_chunked_transfer_encoding(rtsp_hd_out, 0);
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} else {
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/* open the tcp connexion */
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ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
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if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
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@ -1554,6 +1625,7 @@ redirect:
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goto fail;
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}
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rtsp_hd_out = rtsp_hd;
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}
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rt->rtsp_hd = rtsp_hd;
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rt->rtsp_hd_out = rtsp_hd_out;
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rt->seq = 0;
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@ -49,6 +49,15 @@ enum RTSPTransport {
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RTSP_TRANSPORT_NB
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};
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/**
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* Transport mode for the RTSP data. This may be plain, or
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* tunneled, which is done over HTTP.
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*/
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enum RTSPControlTransport {
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RTSP_MODE_PLAIN, /**< Normal RTSP */
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RTSP_MODE_TUNNEL /**< RTSP over HTTP (tunneling) */
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};
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#define RTSP_DEFAULT_PORT 554
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#define RTSP_MAX_TRANSPORTS 8
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#define RTSP_TCP_MAX_PACKET_SIZE 1472
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@ -282,6 +291,9 @@ typedef struct RTSPState {
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/** Additional output handle, used when input and output are done
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* separately, eg for HTTP tunneling. */
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URLContext *rtsp_hd_out;
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/** RTSP transport mode, such as plain or tunneled. */
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enum RTSPControlTransport control_transport;
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} RTSPState;
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/**
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