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-rw-r--r--libs/libcurl/src/rtsp.c1696
1 files changed, 854 insertions, 842 deletions
diff --git a/libs/libcurl/src/rtsp.c b/libs/libcurl/src/rtsp.c
index 6d3bf97e6c..27f26fe298 100644
--- a/libs/libcurl/src/rtsp.c
+++ b/libs/libcurl/src/rtsp.c
@@ -1,842 +1,854 @@
-/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
- *
- * This software is licensed as described in the file COPYING, which
- * you should have received as part of this distribution. The terms
- * are also available at https://curl.se/docs/copyright.html.
- *
- * You may opt to use, copy, modify, merge, publish, distribute and/or sell
- * copies of the Software, and permit persons to whom the Software is
- * furnished to do so, under the terms of the COPYING file.
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- * KIND, either express or implied.
- *
- * SPDX-License-Identifier: curl
- *
- ***************************************************************************/
-
-#include "curl_setup.h"
-
-#if !defined(CURL_DISABLE_RTSP) && !defined(USE_HYPER)
-
-#include "urldata.h"
-#include <curl/curl.h>
-#include "transfer.h"
-#include "sendf.h"
-#include "multiif.h"
-#include "http.h"
-#include "url.h"
-#include "progress.h"
-#include "rtsp.h"
-#include "strcase.h"
-#include "select.h"
-#include "connect.h"
-#include "strdup.h"
-/* The last 3 #include files should be in this order */
-#include "curl_printf.h"
-#include "curl_memory.h"
-#include "memdebug.h"
-
-#define RTP_PKT_CHANNEL(p) ((int)((unsigned char)((p)[1])))
-
-#define RTP_PKT_LENGTH(p) ((((int)((unsigned char)((p)[2]))) << 8) | \
- ((int)((unsigned char)((p)[3]))))
-
-/* protocol-specific functions set up to be called by the main engine */
-static CURLcode rtsp_do(struct Curl_easy *data, bool *done);
-static CURLcode rtsp_done(struct Curl_easy *data, CURLcode, bool premature);
-static CURLcode rtsp_connect(struct Curl_easy *data, bool *done);
-static CURLcode rtsp_disconnect(struct Curl_easy *data,
- struct connectdata *conn, bool dead);
-static int rtsp_getsock_do(struct Curl_easy *data,
- struct connectdata *conn, curl_socket_t *socks);
-
-/*
- * Parse and write out any available RTP data.
- *
- * nread: amount of data left after k->str. will be modified if RTP
- * data is parsed and k->str is moved up
- * readmore: whether or not the RTP parser needs more data right away
- */
-static CURLcode rtsp_rtp_readwrite(struct Curl_easy *data,
- struct connectdata *conn,
- ssize_t *nread,
- bool *readmore);
-
-static CURLcode rtsp_setup_connection(struct Curl_easy *data,
- struct connectdata *conn);
-static unsigned int rtsp_conncheck(struct Curl_easy *data,
- struct connectdata *check,
- unsigned int checks_to_perform);
-
-/* this returns the socket to wait for in the DO and DOING state for the multi
- interface and then we're always _sending_ a request and thus we wait for
- the single socket to become writable only */
-static int rtsp_getsock_do(struct Curl_easy *data, struct connectdata *conn,
- curl_socket_t *socks)
-{
- /* write mode */
- (void)data;
- socks[0] = conn->sock[FIRSTSOCKET];
- return GETSOCK_WRITESOCK(0);
-}
-
-static
-CURLcode rtp_client_write(struct Curl_easy *data, char *ptr, size_t len);
-
-
-/*
- * RTSP handler interface.
- */
-const struct Curl_handler Curl_handler_rtsp = {
- "RTSP", /* scheme */
- rtsp_setup_connection, /* setup_connection */
- rtsp_do, /* do_it */
- rtsp_done, /* done */
- ZERO_NULL, /* do_more */
- rtsp_connect, /* connect_it */
- ZERO_NULL, /* connecting */
- ZERO_NULL, /* doing */
- ZERO_NULL, /* proto_getsock */
- rtsp_getsock_do, /* doing_getsock */
- ZERO_NULL, /* domore_getsock */
- ZERO_NULL, /* perform_getsock */
- rtsp_disconnect, /* disconnect */
- rtsp_rtp_readwrite, /* readwrite */
- rtsp_conncheck, /* connection_check */
- ZERO_NULL, /* attach connection */
- PORT_RTSP, /* defport */
- CURLPROTO_RTSP, /* protocol */
- CURLPROTO_RTSP, /* family */
- PROTOPT_NONE /* flags */
-};
-
-
-static CURLcode rtsp_setup_connection(struct Curl_easy *data,
- struct connectdata *conn)
-{
- struct RTSP *rtsp;
- (void)conn;
-
- data->req.p.rtsp = rtsp = calloc(1, sizeof(struct RTSP));
- if(!rtsp)
- return CURLE_OUT_OF_MEMORY;
-
- return CURLE_OK;
-}
-
-
-/*
- * The server may send us RTP data at any point, and RTSPREQ_RECEIVE does not
- * want to block the application forever while receiving a stream. Therefore,
- * we cannot assume that an RTSP socket is dead just because it is readable.
- *
- * Instead, if it is readable, run Curl_connalive() to peek at the socket
- * and distinguish between closed and data.
- */
-static bool rtsp_connisdead(struct connectdata *check)
-{
- int sval;
- bool ret_val = TRUE;
-
- sval = SOCKET_READABLE(check->sock[FIRSTSOCKET], 0);
- if(sval == 0) {
- /* timeout */
- ret_val = FALSE;
- }
- else if(sval & CURL_CSELECT_ERR) {
- /* socket is in an error state */
- ret_val = TRUE;
- }
- else if(sval & CURL_CSELECT_IN) {
- /* readable with no error. could still be closed */
- ret_val = !Curl_connalive(check);
- }
-
- return ret_val;
-}
-
-/*
- * Function to check on various aspects of a connection.
- */
-static unsigned int rtsp_conncheck(struct Curl_easy *data,
- struct connectdata *conn,
- unsigned int checks_to_perform)
-{
- unsigned int ret_val = CONNRESULT_NONE;
- (void)data;
-
- if(checks_to_perform & CONNCHECK_ISDEAD) {
- if(rtsp_connisdead(conn))
- ret_val |= CONNRESULT_DEAD;
- }
-
- return ret_val;
-}
-
-
-static CURLcode rtsp_connect(struct Curl_easy *data, bool *done)
-{
- CURLcode httpStatus;
-
- httpStatus = Curl_http_connect(data, done);
-
- /* Initialize the CSeq if not already done */
- if(data->state.rtsp_next_client_CSeq == 0)
- data->state.rtsp_next_client_CSeq = 1;
- if(data->state.rtsp_next_server_CSeq == 0)
- data->state.rtsp_next_server_CSeq = 1;
-
- data->conn->proto.rtspc.rtp_channel = -1;
-
- return httpStatus;
-}
-
-static CURLcode rtsp_disconnect(struct Curl_easy *data,
- struct connectdata *conn, bool dead)
-{
- (void) dead;
- (void) data;
- Curl_safefree(conn->proto.rtspc.rtp_buf);
- return CURLE_OK;
-}
-
-
-static CURLcode rtsp_done(struct Curl_easy *data,
- CURLcode status, bool premature)
-{
- struct RTSP *rtsp = data->req.p.rtsp;
- CURLcode httpStatus;
-
- /* Bypass HTTP empty-reply checks on receive */
- if(data->set.rtspreq == RTSPREQ_RECEIVE)
- premature = TRUE;
-
- httpStatus = Curl_http_done(data, status, premature);
-
- if(rtsp && !status && !httpStatus) {
- /* Check the sequence numbers */
- long CSeq_sent = rtsp->CSeq_sent;
- long CSeq_recv = rtsp->CSeq_recv;
- if((data->set.rtspreq != RTSPREQ_RECEIVE) && (CSeq_sent != CSeq_recv)) {
- failf(data,
- "The CSeq of this request %ld did not match the response %ld",
- CSeq_sent, CSeq_recv);
- return CURLE_RTSP_CSEQ_ERROR;
- }
- if(data->set.rtspreq == RTSPREQ_RECEIVE &&
- (data->conn->proto.rtspc.rtp_channel == -1)) {
- infof(data, "Got an RTP Receive with a CSeq of %ld", CSeq_recv);
- }
- }
-
- return httpStatus;
-}
-
-static CURLcode rtsp_do(struct Curl_easy *data, bool *done)
-{
- struct connectdata *conn = data->conn;
- CURLcode result = CURLE_OK;
- Curl_RtspReq rtspreq = data->set.rtspreq;
- struct RTSP *rtsp = data->req.p.rtsp;
- struct dynbuf req_buffer;
- curl_off_t postsize = 0; /* for ANNOUNCE and SET_PARAMETER */
- curl_off_t putsize = 0; /* for ANNOUNCE and SET_PARAMETER */
-
- const char *p_request = NULL;
- const char *p_session_id = NULL;
- const char *p_accept = NULL;
- const char *p_accept_encoding = NULL;
- const char *p_range = NULL;
- const char *p_referrer = NULL;
- const char *p_stream_uri = NULL;
- const char *p_transport = NULL;
- const char *p_uagent = NULL;
- const char *p_proxyuserpwd = NULL;
- const char *p_userpwd = NULL;
-
- *done = TRUE;
-
- rtsp->CSeq_sent = data->state.rtsp_next_client_CSeq;
- rtsp->CSeq_recv = 0;
-
- /* Setup the 'p_request' pointer to the proper p_request string
- * Since all RTSP requests are included here, there is no need to
- * support custom requests like HTTP.
- **/
- data->set.opt_no_body = TRUE; /* most requests don't contain a body */
- switch(rtspreq) {
- default:
- failf(data, "Got invalid RTSP request");
- return CURLE_BAD_FUNCTION_ARGUMENT;
- case RTSPREQ_OPTIONS:
- p_request = "OPTIONS";
- break;
- case RTSPREQ_DESCRIBE:
- p_request = "DESCRIBE";
- data->set.opt_no_body = FALSE;
- break;
- case RTSPREQ_ANNOUNCE:
- p_request = "ANNOUNCE";
- break;
- case RTSPREQ_SETUP:
- p_request = "SETUP";
- break;
- case RTSPREQ_PLAY:
- p_request = "PLAY";
- break;
- case RTSPREQ_PAUSE:
- p_request = "PAUSE";
- break;
- case RTSPREQ_TEARDOWN:
- p_request = "TEARDOWN";
- break;
- case RTSPREQ_GET_PARAMETER:
- /* GET_PARAMETER's no_body status is determined later */
- p_request = "GET_PARAMETER";
- data->set.opt_no_body = FALSE;
- break;
- case RTSPREQ_SET_PARAMETER:
- p_request = "SET_PARAMETER";
- break;
- case RTSPREQ_RECORD:
- p_request = "RECORD";
- break;
- case RTSPREQ_RECEIVE:
- p_request = "";
- /* Treat interleaved RTP as body*/
- data->set.opt_no_body = FALSE;
- break;
- case RTSPREQ_LAST:
- failf(data, "Got invalid RTSP request: RTSPREQ_LAST");
- return CURLE_BAD_FUNCTION_ARGUMENT;
- }
-
- if(rtspreq == RTSPREQ_RECEIVE) {
- Curl_setup_transfer(data, FIRSTSOCKET, -1, TRUE, -1);
-
- return result;
- }
-
- p_session_id = data->set.str[STRING_RTSP_SESSION_ID];
- if(!p_session_id &&
- (rtspreq & ~(RTSPREQ_OPTIONS | RTSPREQ_DESCRIBE | RTSPREQ_SETUP))) {
- failf(data, "Refusing to issue an RTSP request [%s] without a session ID.",
- p_request);
- return CURLE_BAD_FUNCTION_ARGUMENT;
- }
-
- /* Stream URI. Default to server '*' if not specified */
- if(data->set.str[STRING_RTSP_STREAM_URI]) {
- p_stream_uri = data->set.str[STRING_RTSP_STREAM_URI];
- }
- else {
- p_stream_uri = "*";
- }
-
- /* Transport Header for SETUP requests */
- p_transport = Curl_checkheaders(data, STRCONST("Transport"));
- if(rtspreq == RTSPREQ_SETUP && !p_transport) {
- /* New Transport: setting? */
- if(data->set.str[STRING_RTSP_TRANSPORT]) {
- Curl_safefree(data->state.aptr.rtsp_transport);
-
- data->state.aptr.rtsp_transport =
- aprintf("Transport: %s\r\n",
- data->set.str[STRING_RTSP_TRANSPORT]);
- if(!data->state.aptr.rtsp_transport)
- return CURLE_OUT_OF_MEMORY;
- }
- else {
- failf(data,
- "Refusing to issue an RTSP SETUP without a Transport: header.");
- return CURLE_BAD_FUNCTION_ARGUMENT;
- }
-
- p_transport = data->state.aptr.rtsp_transport;
- }
-
- /* Accept Headers for DESCRIBE requests */
- if(rtspreq == RTSPREQ_DESCRIBE) {
- /* Accept Header */
- p_accept = Curl_checkheaders(data, STRCONST("Accept"))?
- NULL:"Accept: application/sdp\r\n";
-
- /* Accept-Encoding header */
- if(!Curl_checkheaders(data, STRCONST("Accept-Encoding")) &&
- data->set.str[STRING_ENCODING]) {
- Curl_safefree(data->state.aptr.accept_encoding);
- data->state.aptr.accept_encoding =
- aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
-
- if(!data->state.aptr.accept_encoding)
- return CURLE_OUT_OF_MEMORY;
-
- p_accept_encoding = data->state.aptr.accept_encoding;
- }
- }
-
- /* The User-Agent string might have been allocated in url.c already, because
- it might have been used in the proxy connect, but if we have got a header
- with the user-agent string specified, we erase the previously made string
- here. */
- if(Curl_checkheaders(data, STRCONST("User-Agent")) &&
- data->state.aptr.uagent) {
- Curl_safefree(data->state.aptr.uagent);
- data->state.aptr.uagent = NULL;
- }
- else if(!Curl_checkheaders(data, STRCONST("User-Agent")) &&
- data->set.str[STRING_USERAGENT]) {
- p_uagent = data->state.aptr.uagent;
- }
-
- /* setup the authentication headers */
- result = Curl_http_output_auth(data, conn, p_request, HTTPREQ_GET,
- p_stream_uri, FALSE);
- if(result)
- return result;
-
- p_proxyuserpwd = data->state.aptr.proxyuserpwd;
- p_userpwd = data->state.aptr.userpwd;
-
- /* Referrer */
- Curl_safefree(data->state.aptr.ref);
- if(data->state.referer && !Curl_checkheaders(data, STRCONST("Referer")))
- data->state.aptr.ref = aprintf("Referer: %s\r\n", data->state.referer);
- else
- data->state.aptr.ref = NULL;
-
- p_referrer = data->state.aptr.ref;
-
- /*
- * Range Header
- * Only applies to PLAY, PAUSE, RECORD
- *
- * Go ahead and use the Range stuff supplied for HTTP
- */
- if(data->state.use_range &&
- (rtspreq & (RTSPREQ_PLAY | RTSPREQ_PAUSE | RTSPREQ_RECORD))) {
-
- /* Check to see if there is a range set in the custom headers */
- if(!Curl_checkheaders(data, STRCONST("Range")) && data->state.range) {
- Curl_safefree(data->state.aptr.rangeline);
- data->state.aptr.rangeline = aprintf("Range: %s\r\n", data->state.range);
- p_range = data->state.aptr.rangeline;
- }
- }
-
- /*
- * Sanity check the custom headers
- */
- if(Curl_checkheaders(data, STRCONST("CSeq"))) {
- failf(data, "CSeq cannot be set as a custom header.");
- return CURLE_RTSP_CSEQ_ERROR;
- }
- if(Curl_checkheaders(data, STRCONST("Session"))) {
- failf(data, "Session ID cannot be set as a custom header.");
- return CURLE_BAD_FUNCTION_ARGUMENT;
- }
-
- /* Initialize a dynamic send buffer */
- Curl_dyn_init(&req_buffer, DYN_RTSP_REQ_HEADER);
-
- result =
- Curl_dyn_addf(&req_buffer,
- "%s %s RTSP/1.0\r\n" /* Request Stream-URI RTSP/1.0 */
- "CSeq: %ld\r\n", /* CSeq */
- p_request, p_stream_uri, rtsp->CSeq_sent);
- if(result)
- return result;
-
- /*
- * Rather than do a normal alloc line, keep the session_id unformatted
- * to make comparison easier
- */
- if(p_session_id) {
- result = Curl_dyn_addf(&req_buffer, "Session: %s\r\n", p_session_id);
- if(result)
- return result;
- }
-
- /*
- * Shared HTTP-like options
- */
- result = Curl_dyn_addf(&req_buffer,
- "%s" /* transport */
- "%s" /* accept */
- "%s" /* accept-encoding */
- "%s" /* range */
- "%s" /* referrer */
- "%s" /* user-agent */
- "%s" /* proxyuserpwd */
- "%s" /* userpwd */
- ,
- p_transport ? p_transport : "",
- p_accept ? p_accept : "",
- p_accept_encoding ? p_accept_encoding : "",
- p_range ? p_range : "",
- p_referrer ? p_referrer : "",
- p_uagent ? p_uagent : "",
- p_proxyuserpwd ? p_proxyuserpwd : "",
- p_userpwd ? p_userpwd : "");
-
- /*
- * Free userpwd now --- cannot reuse this for Negotiate and possibly NTLM
- * with basic and digest, it will be freed anyway by the next request
- */
- Curl_safefree(data->state.aptr.userpwd);
- data->state.aptr.userpwd = NULL;
-
- if(result)
- return result;
-
- if((rtspreq == RTSPREQ_SETUP) || (rtspreq == RTSPREQ_DESCRIBE)) {
- result = Curl_add_timecondition(data, &req_buffer);
- if(result)
- return result;
- }
-
- result = Curl_add_custom_headers(data, FALSE, &req_buffer);
- if(result)
- return result;
-
- if(rtspreq == RTSPREQ_ANNOUNCE ||
- rtspreq == RTSPREQ_SET_PARAMETER ||
- rtspreq == RTSPREQ_GET_PARAMETER) {
-
- if(data->set.upload) {
- putsize = data->state.infilesize;
- data->state.httpreq = HTTPREQ_PUT;
-
- }
- else {
- postsize = (data->state.infilesize != -1)?
- data->state.infilesize:
- (data->set.postfields? (curl_off_t)strlen(data->set.postfields):0);
- data->state.httpreq = HTTPREQ_POST;
- }
-
- if(putsize > 0 || postsize > 0) {
- /* As stated in the http comments, it is probably not wise to
- * actually set a custom Content-Length in the headers */
- if(!Curl_checkheaders(data, STRCONST("Content-Length"))) {
- result =
- Curl_dyn_addf(&req_buffer,
- "Content-Length: %" CURL_FORMAT_CURL_OFF_T"\r\n",
- (data->set.upload ? putsize : postsize));
- if(result)
- return result;
- }
-
- if(rtspreq == RTSPREQ_SET_PARAMETER ||
- rtspreq == RTSPREQ_GET_PARAMETER) {
- if(!Curl_checkheaders(data, STRCONST("Content-Type"))) {
- result = Curl_dyn_addn(&req_buffer,
- STRCONST("Content-Type: "
- "text/parameters\r\n"));
- if(result)
- return result;
- }
- }
-
- if(rtspreq == RTSPREQ_ANNOUNCE) {
- if(!Curl_checkheaders(data, STRCONST("Content-Type"))) {
- result = Curl_dyn_addn(&req_buffer,
- STRCONST("Content-Type: "
- "application/sdp\r\n"));
- if(result)
- return result;
- }
- }
-
- data->state.expect100header = FALSE; /* RTSP posts are simple/small */
- }
- else if(rtspreq == RTSPREQ_GET_PARAMETER) {
- /* Check for an empty GET_PARAMETER (heartbeat) request */
- data->state.httpreq = HTTPREQ_HEAD;
- data->set.opt_no_body = TRUE;
- }
- }
-
- /* RTSP never allows chunked transfer */
- data->req.forbidchunk = TRUE;
- /* Finish the request buffer */
- result = Curl_dyn_addn(&req_buffer, STRCONST("\r\n"));
- if(result)
- return result;
-
- if(postsize > 0) {
- result = Curl_dyn_addn(&req_buffer, data->set.postfields,
- (size_t)postsize);
- if(result)
- return result;
- }
-
- /* issue the request */
- result = Curl_buffer_send(&req_buffer, data,
- &data->info.request_size, 0, FIRSTSOCKET);
- if(result) {
- failf(data, "Failed sending RTSP request");
- return result;
- }
-
- Curl_setup_transfer(data, FIRSTSOCKET, -1, TRUE, putsize?FIRSTSOCKET:-1);
-
- /* Increment the CSeq on success */
- data->state.rtsp_next_client_CSeq++;
-
- if(data->req.writebytecount) {
- /* if a request-body has been sent off, we make sure this progress is
- noted properly */
- Curl_pgrsSetUploadCounter(data, data->req.writebytecount);
- if(Curl_pgrsUpdate(data))
- result = CURLE_ABORTED_BY_CALLBACK;
- }
-
- return result;
-}
-
-
-static CURLcode rtsp_rtp_readwrite(struct Curl_easy *data,
- struct connectdata *conn,
- ssize_t *nread,
- bool *readmore) {
- struct SingleRequest *k = &data->req;
- struct rtsp_conn *rtspc = &(conn->proto.rtspc);
-
- char *rtp; /* moving pointer to rtp data */
- ssize_t rtp_dataleft; /* how much data left to parse in this round */
- char *scratch;
- CURLcode result;
-
- if(rtspc->rtp_buf) {
- /* There was some leftover data the last time. Merge buffers */
- char *newptr = Curl_saferealloc(rtspc->rtp_buf,
- rtspc->rtp_bufsize + *nread);
- if(!newptr) {
- rtspc->rtp_buf = NULL;
- rtspc->rtp_bufsize = 0;
- return CURLE_OUT_OF_MEMORY;
- }
- rtspc->rtp_buf = newptr;
- memcpy(rtspc->rtp_buf + rtspc->rtp_bufsize, k->str, *nread);
- rtspc->rtp_bufsize += *nread;
- rtp = rtspc->rtp_buf;
- rtp_dataleft = rtspc->rtp_bufsize;
- }
- else {
- /* Just parse the request buffer directly */
- rtp = k->str;
- rtp_dataleft = *nread;
- }
-
- while((rtp_dataleft > 0) &&
- (rtp[0] == '$')) {
- if(rtp_dataleft > 4) {
- int rtp_length;
-
- /* Parse the header */
- /* The channel identifier immediately follows and is 1 byte */
- rtspc->rtp_channel = RTP_PKT_CHANNEL(rtp);
-
- /* The length is two bytes */
- rtp_length = RTP_PKT_LENGTH(rtp);
-
- if(rtp_dataleft < rtp_length + 4) {
- /* Need more - incomplete payload*/
- *readmore = TRUE;
- break;
- }
- /* We have the full RTP interleaved packet
- * Write out the header including the leading '$' */
- DEBUGF(infof(data, "RTP write channel %d rtp_length %d",
- rtspc->rtp_channel, rtp_length));
- result = rtp_client_write(data, &rtp[0], rtp_length + 4);
- if(result) {
- failf(data, "Got an error writing an RTP packet");
- *readmore = FALSE;
- Curl_safefree(rtspc->rtp_buf);
- rtspc->rtp_buf = NULL;
- rtspc->rtp_bufsize = 0;
- return result;
- }
-
- /* Move forward in the buffer */
- rtp_dataleft -= rtp_length + 4;
- rtp += rtp_length + 4;
-
- if(data->set.rtspreq == RTSPREQ_RECEIVE) {
- /* If we are in a passive receive, give control back
- * to the app as often as we can.
- */
- k->keepon &= ~KEEP_RECV;
- }
- }
- else {
- /* Need more - incomplete header */
- *readmore = TRUE;
- break;
- }
- }
-
- if(rtp_dataleft && rtp[0] == '$') {
- DEBUGF(infof(data, "RTP Rewinding %zd %s", rtp_dataleft,
- *readmore ? "(READMORE)" : ""));
-
- /* Store the incomplete RTP packet for a "rewind" */
- scratch = malloc(rtp_dataleft);
- if(!scratch) {
- Curl_safefree(rtspc->rtp_buf);
- rtspc->rtp_buf = NULL;
- rtspc->rtp_bufsize = 0;
- return CURLE_OUT_OF_MEMORY;
- }
- memcpy(scratch, rtp, rtp_dataleft);
- Curl_safefree(rtspc->rtp_buf);
- rtspc->rtp_buf = scratch;
- rtspc->rtp_bufsize = rtp_dataleft;
-
- /* As far as the transfer is concerned, this data is consumed */
- *nread = 0;
- return CURLE_OK;
- }
- /* Fix up k->str to point just after the last RTP packet */
- k->str += *nread - rtp_dataleft;
-
- /* either all of the data has been read or...
- * rtp now points at the next byte to parse
- */
- if(rtp_dataleft > 0)
- DEBUGASSERT(k->str[0] == rtp[0]);
-
- DEBUGASSERT(rtp_dataleft <= *nread); /* sanity check */
-
- *nread = rtp_dataleft;
-
- /* If we get here, we have finished with the leftover/merge buffer */
- Curl_safefree(rtspc->rtp_buf);
- rtspc->rtp_buf = NULL;
- rtspc->rtp_bufsize = 0;
-
- return CURLE_OK;
-}
-
-static
-CURLcode rtp_client_write(struct Curl_easy *data, char *ptr, size_t len)
-{
- size_t wrote;
- curl_write_callback writeit;
- void *user_ptr;
-
- if(len == 0) {
- failf(data, "Cannot write a 0 size RTP packet.");
- return CURLE_WRITE_ERROR;
- }
-
- /* If the user has configured CURLOPT_INTERLEAVEFUNCTION then use that
- function and any configured CURLOPT_INTERLEAVEDATA to write out the RTP
- data. Otherwise, use the CURLOPT_WRITEFUNCTION with the CURLOPT_WRITEDATA
- pointer to write out the RTP data. */
- if(data->set.fwrite_rtp) {
- writeit = data->set.fwrite_rtp;
- user_ptr = data->set.rtp_out;
- }
- else {
- writeit = data->set.fwrite_func;
- user_ptr = data->set.out;
- }
-
- Curl_set_in_callback(data, true);
- wrote = writeit(ptr, 1, len, user_ptr);
- Curl_set_in_callback(data, false);
-
- if(CURL_WRITEFUNC_PAUSE == wrote) {
- failf(data, "Cannot pause RTP");
- return CURLE_WRITE_ERROR;
- }
-
- if(wrote != len) {
- failf(data, "Failed writing RTP data");
- return CURLE_WRITE_ERROR;
- }
-
- return CURLE_OK;
-}
-
-CURLcode Curl_rtsp_parseheader(struct Curl_easy *data, char *header)
-{
- long CSeq = 0;
-
- if(checkprefix("CSeq:", header)) {
- /* Store the received CSeq. Match is verified in rtsp_done */
- int nc = sscanf(&header[4], ": %ld", &CSeq);
- if(nc == 1) {
- struct RTSP *rtsp = data->req.p.rtsp;
- rtsp->CSeq_recv = CSeq; /* mark the request */
- data->state.rtsp_CSeq_recv = CSeq; /* update the handle */
- }
- else {
- failf(data, "Unable to read the CSeq header: [%s]", header);
- return CURLE_RTSP_CSEQ_ERROR;
- }
- }
- else if(checkprefix("Session:", header)) {
- char *start;
- char *end;
- size_t idlen;
-
- /* Find the first non-space letter */
- start = header + 8;
- while(*start && ISBLANK(*start))
- start++;
-
- if(!*start) {
- failf(data, "Got a blank Session ID");
- return CURLE_RTSP_SESSION_ERROR;
- }
-
- /* Find the end of Session ID
- *
- * Allow any non whitespace content, up to the field separator or end of
- * line. RFC 2326 isn't 100% clear on the session ID and for example
- * gstreamer does url-encoded session ID's not covered by the standard.
- */
- end = start;
- while(*end && *end != ';' && !ISSPACE(*end))
- end++;
- idlen = end - start;
-
- if(data->set.str[STRING_RTSP_SESSION_ID]) {
-
- /* If the Session ID is set, then compare */
- if(strlen(data->set.str[STRING_RTSP_SESSION_ID]) != idlen ||
- strncmp(start, data->set.str[STRING_RTSP_SESSION_ID], idlen) != 0) {
- failf(data, "Got RTSP Session ID Line [%s], but wanted ID [%s]",
- start, data->set.str[STRING_RTSP_SESSION_ID]);
- return CURLE_RTSP_SESSION_ERROR;
- }
- }
- else {
- /* If the Session ID is not set, and we find it in a response, then set
- * it.
- */
-
- /* Copy the id substring into a new buffer */
- data->set.str[STRING_RTSP_SESSION_ID] = malloc(idlen + 1);
- if(!data->set.str[STRING_RTSP_SESSION_ID])
- return CURLE_OUT_OF_MEMORY;
- memcpy(data->set.str[STRING_RTSP_SESSION_ID], start, idlen);
- (data->set.str[STRING_RTSP_SESSION_ID])[idlen] = '\0';
- }
- }
- return CURLE_OK;
-}
-
-#endif /* CURL_DISABLE_RTSP or using Hyper */
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if !defined(CURL_DISABLE_RTSP) && !defined(USE_HYPER)
+
+#include "urldata.h"
+#include <curl/curl.h>
+#include "transfer.h"
+#include "sendf.h"
+#include "multiif.h"
+#include "http.h"
+#include "url.h"
+#include "progress.h"
+#include "rtsp.h"
+#include "strcase.h"
+#include "select.h"
+#include "connect.h"
+#include "strdup.h"
+/* The last 3 #include files should be in this order */
+#include "curl_printf.h"
+#include "curl_memory.h"
+#include "memdebug.h"
+
+#define RTP_PKT_CHANNEL(p) ((int)((unsigned char)((p)[1])))
+
+#define RTP_PKT_LENGTH(p) ((((int)((unsigned char)((p)[2]))) << 8) | \
+ ((int)((unsigned char)((p)[3]))))
+
+/* protocol-specific functions set up to be called by the main engine */
+static CURLcode rtsp_do(struct Curl_easy *data, bool *done);
+static CURLcode rtsp_done(struct Curl_easy *data, CURLcode, bool premature);
+static CURLcode rtsp_connect(struct Curl_easy *data, bool *done);
+static CURLcode rtsp_disconnect(struct Curl_easy *data,
+ struct connectdata *conn, bool dead);
+static int rtsp_getsock_do(struct Curl_easy *data,
+ struct connectdata *conn, curl_socket_t *socks);
+
+/*
+ * Parse and write out any available RTP data.
+ *
+ * nread: amount of data left after k->str. will be modified if RTP
+ * data is parsed and k->str is moved up
+ * readmore: whether or not the RTP parser needs more data right away
+ */
+static CURLcode rtsp_rtp_readwrite(struct Curl_easy *data,
+ struct connectdata *conn,
+ ssize_t *nread,
+ bool *readmore);
+
+static CURLcode rtsp_setup_connection(struct Curl_easy *data,
+ struct connectdata *conn);
+static unsigned int rtsp_conncheck(struct Curl_easy *data,
+ struct connectdata *check,
+ unsigned int checks_to_perform);
+
+/* this returns the socket to wait for in the DO and DOING state for the multi
+ interface and then we're always _sending_ a request and thus we wait for
+ the single socket to become writable only */
+static int rtsp_getsock_do(struct Curl_easy *data, struct connectdata *conn,
+ curl_socket_t *socks)
+{
+ /* write mode */
+ (void)data;
+ socks[0] = conn->sock[FIRSTSOCKET];
+ return GETSOCK_WRITESOCK(0);
+}
+
+static
+CURLcode rtp_client_write(struct Curl_easy *data, char *ptr, size_t len);
+
+
+/*
+ * RTSP handler interface.
+ */
+const struct Curl_handler Curl_handler_rtsp = {
+ "RTSP", /* scheme */
+ rtsp_setup_connection, /* setup_connection */
+ rtsp_do, /* do_it */
+ rtsp_done, /* done */
+ ZERO_NULL, /* do_more */
+ rtsp_connect, /* connect_it */
+ ZERO_NULL, /* connecting */
+ ZERO_NULL, /* doing */
+ ZERO_NULL, /* proto_getsock */
+ rtsp_getsock_do, /* doing_getsock */
+ ZERO_NULL, /* domore_getsock */
+ ZERO_NULL, /* perform_getsock */
+ rtsp_disconnect, /* disconnect */
+ rtsp_rtp_readwrite, /* readwrite */
+ rtsp_conncheck, /* connection_check */
+ ZERO_NULL, /* attach connection */
+ PORT_RTSP, /* defport */
+ CURLPROTO_RTSP, /* protocol */
+ CURLPROTO_RTSP, /* family */
+ PROTOPT_NONE /* flags */
+};
+
+
+static CURLcode rtsp_setup_connection(struct Curl_easy *data,
+ struct connectdata *conn)
+{
+ struct RTSP *rtsp;
+ (void)conn;
+
+ data->req.p.rtsp = rtsp = calloc(1, sizeof(struct RTSP));
+ if(!rtsp)
+ return CURLE_OUT_OF_MEMORY;
+
+ return CURLE_OK;
+}
+
+
+/*
+ * The server may send us RTP data at any point, and RTSPREQ_RECEIVE does not
+ * want to block the application forever while receiving a stream. Therefore,
+ * we cannot assume that an RTSP socket is dead just because it is readable.
+ *
+ * Instead, if it is readable, run Curl_connalive() to peek at the socket
+ * and distinguish between closed and data.
+ */
+static bool rtsp_connisdead(struct Curl_easy *data, struct connectdata *check)
+{
+ int sval;
+ bool ret_val = TRUE;
+
+ sval = SOCKET_READABLE(check->sock[FIRSTSOCKET], 0);
+ if(sval == 0) {
+ /* timeout */
+ ret_val = FALSE;
+ }
+ else if(sval & CURL_CSELECT_ERR) {
+ /* socket is in an error state */
+ ret_val = TRUE;
+ }
+ else if(sval & CURL_CSELECT_IN) {
+ /* readable with no error. could still be closed */
+ ret_val = !Curl_connalive(data, check);
+ }
+
+ return ret_val;
+}
+
+/*
+ * Function to check on various aspects of a connection.
+ */
+static unsigned int rtsp_conncheck(struct Curl_easy *data,
+ struct connectdata *conn,
+ unsigned int checks_to_perform)
+{
+ unsigned int ret_val = CONNRESULT_NONE;
+ (void)data;
+
+ if(checks_to_perform & CONNCHECK_ISDEAD) {
+ if(rtsp_connisdead(data, conn))
+ ret_val |= CONNRESULT_DEAD;
+ }
+
+ return ret_val;
+}
+
+
+static CURLcode rtsp_connect(struct Curl_easy *data, bool *done)
+{
+ CURLcode httpStatus;
+
+ httpStatus = Curl_http_connect(data, done);
+
+ /* Initialize the CSeq if not already done */
+ if(data->state.rtsp_next_client_CSeq == 0)
+ data->state.rtsp_next_client_CSeq = 1;
+ if(data->state.rtsp_next_server_CSeq == 0)
+ data->state.rtsp_next_server_CSeq = 1;
+
+ data->conn->proto.rtspc.rtp_channel = -1;
+
+ return httpStatus;
+}
+
+static CURLcode rtsp_disconnect(struct Curl_easy *data,
+ struct connectdata *conn, bool dead)
+{
+ (void) dead;
+ (void) data;
+ Curl_safefree(conn->proto.rtspc.rtp_buf);
+ return CURLE_OK;
+}
+
+
+static CURLcode rtsp_done(struct Curl_easy *data,
+ CURLcode status, bool premature)
+{
+ struct RTSP *rtsp = data->req.p.rtsp;
+ CURLcode httpStatus;
+
+ /* Bypass HTTP empty-reply checks on receive */
+ if(data->set.rtspreq == RTSPREQ_RECEIVE)
+ premature = TRUE;
+
+ httpStatus = Curl_http_done(data, status, premature);
+
+ if(rtsp && !status && !httpStatus) {
+ /* Check the sequence numbers */
+ long CSeq_sent = rtsp->CSeq_sent;
+ long CSeq_recv = rtsp->CSeq_recv;
+ if((data->set.rtspreq != RTSPREQ_RECEIVE) && (CSeq_sent != CSeq_recv)) {
+ failf(data,
+ "The CSeq of this request %ld did not match the response %ld",
+ CSeq_sent, CSeq_recv);
+ return CURLE_RTSP_CSEQ_ERROR;
+ }
+ if(data->set.rtspreq == RTSPREQ_RECEIVE &&
+ (data->conn->proto.rtspc.rtp_channel == -1)) {
+ infof(data, "Got an RTP Receive with a CSeq of %ld", CSeq_recv);
+ }
+ }
+
+ return httpStatus;
+}
+
+static CURLcode rtsp_do(struct Curl_easy *data, bool *done)
+{
+ struct connectdata *conn = data->conn;
+ CURLcode result = CURLE_OK;
+ Curl_RtspReq rtspreq = data->set.rtspreq;
+ struct RTSP *rtsp = data->req.p.rtsp;
+ struct dynbuf req_buffer;
+ curl_off_t postsize = 0; /* for ANNOUNCE and SET_PARAMETER */
+ curl_off_t putsize = 0; /* for ANNOUNCE and SET_PARAMETER */
+
+ const char *p_request = NULL;
+ const char *p_session_id = NULL;
+ const char *p_accept = NULL;
+ const char *p_accept_encoding = NULL;
+ const char *p_range = NULL;
+ const char *p_referrer = NULL;
+ const char *p_stream_uri = NULL;
+ const char *p_transport = NULL;
+ const char *p_uagent = NULL;
+ const char *p_proxyuserpwd = NULL;
+ const char *p_userpwd = NULL;
+
+ *done = TRUE;
+
+ rtsp->CSeq_sent = data->state.rtsp_next_client_CSeq;
+ rtsp->CSeq_recv = 0;
+
+ /* Setup the first_* fields to allow auth details get sent
+ to this origin */
+
+ if(!data->state.first_host) {
+ data->state.first_host = strdup(conn->host.name);
+ if(!data->state.first_host)
+ return CURLE_OUT_OF_MEMORY;
+
+ data->state.first_remote_port = conn->remote_port;
+ data->state.first_remote_protocol = conn->handler->protocol;
+ }
+
+ /* Setup the 'p_request' pointer to the proper p_request string
+ * Since all RTSP requests are included here, there is no need to
+ * support custom requests like HTTP.
+ **/
+ data->req.no_body = TRUE; /* most requests don't contain a body */
+ switch(rtspreq) {
+ default:
+ failf(data, "Got invalid RTSP request");
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ case RTSPREQ_OPTIONS:
+ p_request = "OPTIONS";
+ break;
+ case RTSPREQ_DESCRIBE:
+ p_request = "DESCRIBE";
+ data->req.no_body = FALSE;
+ break;
+ case RTSPREQ_ANNOUNCE:
+ p_request = "ANNOUNCE";
+ break;
+ case RTSPREQ_SETUP:
+ p_request = "SETUP";
+ break;
+ case RTSPREQ_PLAY:
+ p_request = "PLAY";
+ break;
+ case RTSPREQ_PAUSE:
+ p_request = "PAUSE";
+ break;
+ case RTSPREQ_TEARDOWN:
+ p_request = "TEARDOWN";
+ break;
+ case RTSPREQ_GET_PARAMETER:
+ /* GET_PARAMETER's no_body status is determined later */
+ p_request = "GET_PARAMETER";
+ data->req.no_body = FALSE;
+ break;
+ case RTSPREQ_SET_PARAMETER:
+ p_request = "SET_PARAMETER";
+ break;
+ case RTSPREQ_RECORD:
+ p_request = "RECORD";
+ break;
+ case RTSPREQ_RECEIVE:
+ p_request = "";
+ /* Treat interleaved RTP as body */
+ data->req.no_body = FALSE;
+ break;
+ case RTSPREQ_LAST:
+ failf(data, "Got invalid RTSP request: RTSPREQ_LAST");
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ }
+
+ if(rtspreq == RTSPREQ_RECEIVE) {
+ Curl_setup_transfer(data, FIRSTSOCKET, -1, TRUE, -1);
+
+ return result;
+ }
+
+ p_session_id = data->set.str[STRING_RTSP_SESSION_ID];
+ if(!p_session_id &&
+ (rtspreq & ~(RTSPREQ_OPTIONS | RTSPREQ_DESCRIBE | RTSPREQ_SETUP))) {
+ failf(data, "Refusing to issue an RTSP request [%s] without a session ID.",
+ p_request);
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ }
+
+ /* Stream URI. Default to server '*' if not specified */
+ if(data->set.str[STRING_RTSP_STREAM_URI]) {
+ p_stream_uri = data->set.str[STRING_RTSP_STREAM_URI];
+ }
+ else {
+ p_stream_uri = "*";
+ }
+
+ /* Transport Header for SETUP requests */
+ p_transport = Curl_checkheaders(data, STRCONST("Transport"));
+ if(rtspreq == RTSPREQ_SETUP && !p_transport) {
+ /* New Transport: setting? */
+ if(data->set.str[STRING_RTSP_TRANSPORT]) {
+ Curl_safefree(data->state.aptr.rtsp_transport);
+
+ data->state.aptr.rtsp_transport =
+ aprintf("Transport: %s\r\n",
+ data->set.str[STRING_RTSP_TRANSPORT]);
+ if(!data->state.aptr.rtsp_transport)
+ return CURLE_OUT_OF_MEMORY;
+ }
+ else {
+ failf(data,
+ "Refusing to issue an RTSP SETUP without a Transport: header.");
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ }
+
+ p_transport = data->state.aptr.rtsp_transport;
+ }
+
+ /* Accept Headers for DESCRIBE requests */
+ if(rtspreq == RTSPREQ_DESCRIBE) {
+ /* Accept Header */
+ p_accept = Curl_checkheaders(data, STRCONST("Accept"))?
+ NULL:"Accept: application/sdp\r\n";
+
+ /* Accept-Encoding header */
+ if(!Curl_checkheaders(data, STRCONST("Accept-Encoding")) &&
+ data->set.str[STRING_ENCODING]) {
+ Curl_safefree(data->state.aptr.accept_encoding);
+ data->state.aptr.accept_encoding =
+ aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
+
+ if(!data->state.aptr.accept_encoding)
+ return CURLE_OUT_OF_MEMORY;
+
+ p_accept_encoding = data->state.aptr.accept_encoding;
+ }
+ }
+
+ /* The User-Agent string might have been allocated in url.c already, because
+ it might have been used in the proxy connect, but if we have got a header
+ with the user-agent string specified, we erase the previously made string
+ here. */
+ if(Curl_checkheaders(data, STRCONST("User-Agent")) &&
+ data->state.aptr.uagent) {
+ Curl_safefree(data->state.aptr.uagent);
+ data->state.aptr.uagent = NULL;
+ }
+ else if(!Curl_checkheaders(data, STRCONST("User-Agent")) &&
+ data->set.str[STRING_USERAGENT]) {
+ p_uagent = data->state.aptr.uagent;
+ }
+
+ /* setup the authentication headers */
+ result = Curl_http_output_auth(data, conn, p_request, HTTPREQ_GET,
+ p_stream_uri, FALSE);
+ if(result)
+ return result;
+
+ p_proxyuserpwd = data->state.aptr.proxyuserpwd;
+ p_userpwd = data->state.aptr.userpwd;
+
+ /* Referrer */
+ Curl_safefree(data->state.aptr.ref);
+ if(data->state.referer && !Curl_checkheaders(data, STRCONST("Referer")))
+ data->state.aptr.ref = aprintf("Referer: %s\r\n", data->state.referer);
+ else
+ data->state.aptr.ref = NULL;
+
+ p_referrer = data->state.aptr.ref;
+
+ /*
+ * Range Header
+ * Only applies to PLAY, PAUSE, RECORD
+ *
+ * Go ahead and use the Range stuff supplied for HTTP
+ */
+ if(data->state.use_range &&
+ (rtspreq & (RTSPREQ_PLAY | RTSPREQ_PAUSE | RTSPREQ_RECORD))) {
+
+ /* Check to see if there is a range set in the custom headers */
+ if(!Curl_checkheaders(data, STRCONST("Range")) && data->state.range) {
+ Curl_safefree(data->state.aptr.rangeline);
+ data->state.aptr.rangeline = aprintf("Range: %s\r\n", data->state.range);
+ p_range = data->state.aptr.rangeline;
+ }
+ }
+
+ /*
+ * Sanity check the custom headers
+ */
+ if(Curl_checkheaders(data, STRCONST("CSeq"))) {
+ failf(data, "CSeq cannot be set as a custom header.");
+ return CURLE_RTSP_CSEQ_ERROR;
+ }
+ if(Curl_checkheaders(data, STRCONST("Session"))) {
+ failf(data, "Session ID cannot be set as a custom header.");
+ return CURLE_BAD_FUNCTION_ARGUMENT;
+ }
+
+ /* Initialize a dynamic send buffer */
+ Curl_dyn_init(&req_buffer, DYN_RTSP_REQ_HEADER);
+
+ result =
+ Curl_dyn_addf(&req_buffer,
+ "%s %s RTSP/1.0\r\n" /* Request Stream-URI RTSP/1.0 */
+ "CSeq: %ld\r\n", /* CSeq */
+ p_request, p_stream_uri, rtsp->CSeq_sent);
+ if(result)
+ return result;
+
+ /*
+ * Rather than do a normal alloc line, keep the session_id unformatted
+ * to make comparison easier
+ */
+ if(p_session_id) {
+ result = Curl_dyn_addf(&req_buffer, "Session: %s\r\n", p_session_id);
+ if(result)
+ return result;
+ }
+
+ /*
+ * Shared HTTP-like options
+ */
+ result = Curl_dyn_addf(&req_buffer,
+ "%s" /* transport */
+ "%s" /* accept */
+ "%s" /* accept-encoding */
+ "%s" /* range */
+ "%s" /* referrer */
+ "%s" /* user-agent */
+ "%s" /* proxyuserpwd */
+ "%s" /* userpwd */
+ ,
+ p_transport ? p_transport : "",
+ p_accept ? p_accept : "",
+ p_accept_encoding ? p_accept_encoding : "",
+ p_range ? p_range : "",
+ p_referrer ? p_referrer : "",
+ p_uagent ? p_uagent : "",
+ p_proxyuserpwd ? p_proxyuserpwd : "",
+ p_userpwd ? p_userpwd : "");
+
+ /*
+ * Free userpwd now --- cannot reuse this for Negotiate and possibly NTLM
+ * with basic and digest, it will be freed anyway by the next request
+ */
+ Curl_safefree(data->state.aptr.userpwd);
+ data->state.aptr.userpwd = NULL;
+
+ if(result)
+ return result;
+
+ if((rtspreq == RTSPREQ_SETUP) || (rtspreq == RTSPREQ_DESCRIBE)) {
+ result = Curl_add_timecondition(data, &req_buffer);
+ if(result)
+ return result;
+ }
+
+ result = Curl_add_custom_headers(data, FALSE, &req_buffer);
+ if(result)
+ return result;
+
+ if(rtspreq == RTSPREQ_ANNOUNCE ||
+ rtspreq == RTSPREQ_SET_PARAMETER ||
+ rtspreq == RTSPREQ_GET_PARAMETER) {
+
+ if(data->set.upload) {
+ putsize = data->state.infilesize;
+ data->state.httpreq = HTTPREQ_PUT;
+
+ }
+ else {
+ postsize = (data->state.infilesize != -1)?
+ data->state.infilesize:
+ (data->set.postfields? (curl_off_t)strlen(data->set.postfields):0);
+ data->state.httpreq = HTTPREQ_POST;
+ }
+
+ if(putsize > 0 || postsize > 0) {
+ /* As stated in the http comments, it is probably not wise to
+ * actually set a custom Content-Length in the headers */
+ if(!Curl_checkheaders(data, STRCONST("Content-Length"))) {
+ result =
+ Curl_dyn_addf(&req_buffer,
+ "Content-Length: %" CURL_FORMAT_CURL_OFF_T"\r\n",
+ (data->set.upload ? putsize : postsize));
+ if(result)
+ return result;
+ }
+
+ if(rtspreq == RTSPREQ_SET_PARAMETER ||
+ rtspreq == RTSPREQ_GET_PARAMETER) {
+ if(!Curl_checkheaders(data, STRCONST("Content-Type"))) {
+ result = Curl_dyn_addn(&req_buffer,
+ STRCONST("Content-Type: "
+ "text/parameters\r\n"));
+ if(result)
+ return result;
+ }
+ }
+
+ if(rtspreq == RTSPREQ_ANNOUNCE) {
+ if(!Curl_checkheaders(data, STRCONST("Content-Type"))) {
+ result = Curl_dyn_addn(&req_buffer,
+ STRCONST("Content-Type: "
+ "application/sdp\r\n"));
+ if(result)
+ return result;
+ }
+ }
+
+ data->state.expect100header = FALSE; /* RTSP posts are simple/small */
+ }
+ else if(rtspreq == RTSPREQ_GET_PARAMETER) {
+ /* Check for an empty GET_PARAMETER (heartbeat) request */
+ data->state.httpreq = HTTPREQ_HEAD;
+ data->req.no_body = TRUE;
+ }
+ }
+
+ /* RTSP never allows chunked transfer */
+ data->req.forbidchunk = TRUE;
+ /* Finish the request buffer */
+ result = Curl_dyn_addn(&req_buffer, STRCONST("\r\n"));
+ if(result)
+ return result;
+
+ if(postsize > 0) {
+ result = Curl_dyn_addn(&req_buffer, data->set.postfields,
+ (size_t)postsize);
+ if(result)
+ return result;
+ }
+
+ /* issue the request */
+ result = Curl_buffer_send(&req_buffer, data,
+ &data->info.request_size, 0, FIRSTSOCKET);
+ if(result) {
+ failf(data, "Failed sending RTSP request");
+ return result;
+ }
+
+ Curl_setup_transfer(data, FIRSTSOCKET, -1, TRUE, putsize?FIRSTSOCKET:-1);
+
+ /* Increment the CSeq on success */
+ data->state.rtsp_next_client_CSeq++;
+
+ if(data->req.writebytecount) {
+ /* if a request-body has been sent off, we make sure this progress is
+ noted properly */
+ Curl_pgrsSetUploadCounter(data, data->req.writebytecount);
+ if(Curl_pgrsUpdate(data))
+ result = CURLE_ABORTED_BY_CALLBACK;
+ }
+
+ return result;
+}
+
+
+static CURLcode rtsp_rtp_readwrite(struct Curl_easy *data,
+ struct connectdata *conn,
+ ssize_t *nread,
+ bool *readmore) {
+ struct SingleRequest *k = &data->req;
+ struct rtsp_conn *rtspc = &(conn->proto.rtspc);
+
+ char *rtp; /* moving pointer to rtp data */
+ ssize_t rtp_dataleft; /* how much data left to parse in this round */
+ char *scratch;
+ CURLcode result;
+
+ if(rtspc->rtp_buf) {
+ /* There was some leftover data the last time. Merge buffers */
+ char *newptr = Curl_saferealloc(rtspc->rtp_buf,
+ rtspc->rtp_bufsize + *nread);
+ if(!newptr) {
+ rtspc->rtp_buf = NULL;
+ rtspc->rtp_bufsize = 0;
+ return CURLE_OUT_OF_MEMORY;
+ }
+ rtspc->rtp_buf = newptr;
+ memcpy(rtspc->rtp_buf + rtspc->rtp_bufsize, k->str, *nread);
+ rtspc->rtp_bufsize += *nread;
+ rtp = rtspc->rtp_buf;
+ rtp_dataleft = rtspc->rtp_bufsize;
+ }
+ else {
+ /* Just parse the request buffer directly */
+ rtp = k->str;
+ rtp_dataleft = *nread;
+ }
+
+ while((rtp_dataleft > 0) &&
+ (rtp[0] == '$')) {
+ if(rtp_dataleft > 4) {
+ int rtp_length;
+
+ /* Parse the header */
+ /* The channel identifier immediately follows and is 1 byte */
+ rtspc->rtp_channel = RTP_PKT_CHANNEL(rtp);
+
+ /* The length is two bytes */
+ rtp_length = RTP_PKT_LENGTH(rtp);
+
+ if(rtp_dataleft < rtp_length + 4) {
+ /* Need more - incomplete payload */
+ *readmore = TRUE;
+ break;
+ }
+ /* We have the full RTP interleaved packet
+ * Write out the header including the leading '$' */
+ DEBUGF(infof(data, "RTP write channel %d rtp_length %d",
+ rtspc->rtp_channel, rtp_length));
+ result = rtp_client_write(data, &rtp[0], rtp_length + 4);
+ if(result) {
+ failf(data, "Got an error writing an RTP packet");
+ *readmore = FALSE;
+ Curl_safefree(rtspc->rtp_buf);
+ rtspc->rtp_buf = NULL;
+ rtspc->rtp_bufsize = 0;
+ return result;
+ }
+
+ /* Move forward in the buffer */
+ rtp_dataleft -= rtp_length + 4;
+ rtp += rtp_length + 4;
+
+ if(data->set.rtspreq == RTSPREQ_RECEIVE) {
+ /* If we are in a passive receive, give control back
+ * to the app as often as we can.
+ */
+ k->keepon &= ~KEEP_RECV;
+ }
+ }
+ else {
+ /* Need more - incomplete header */
+ *readmore = TRUE;
+ break;
+ }
+ }
+
+ if(rtp_dataleft && rtp[0] == '$') {
+ DEBUGF(infof(data, "RTP Rewinding %zd %s", rtp_dataleft,
+ *readmore ? "(READMORE)" : ""));
+
+ /* Store the incomplete RTP packet for a "rewind" */
+ scratch = malloc(rtp_dataleft);
+ if(!scratch) {
+ Curl_safefree(rtspc->rtp_buf);
+ rtspc->rtp_buf = NULL;
+ rtspc->rtp_bufsize = 0;
+ return CURLE_OUT_OF_MEMORY;
+ }
+ memcpy(scratch, rtp, rtp_dataleft);
+ Curl_safefree(rtspc->rtp_buf);
+ rtspc->rtp_buf = scratch;
+ rtspc->rtp_bufsize = rtp_dataleft;
+
+ /* As far as the transfer is concerned, this data is consumed */
+ *nread = 0;
+ return CURLE_OK;
+ }
+ /* Fix up k->str to point just after the last RTP packet */
+ k->str += *nread - rtp_dataleft;
+
+ /* either all of the data has been read or...
+ * rtp now points at the next byte to parse
+ */
+ if(rtp_dataleft > 0)
+ DEBUGASSERT(k->str[0] == rtp[0]);
+
+ DEBUGASSERT(rtp_dataleft <= *nread); /* sanity check */
+
+ *nread = rtp_dataleft;
+
+ /* If we get here, we have finished with the leftover/merge buffer */
+ Curl_safefree(rtspc->rtp_buf);
+ rtspc->rtp_buf = NULL;
+ rtspc->rtp_bufsize = 0;
+
+ return CURLE_OK;
+}
+
+static
+CURLcode rtp_client_write(struct Curl_easy *data, char *ptr, size_t len)
+{
+ size_t wrote;
+ curl_write_callback writeit;
+ void *user_ptr;
+
+ if(len == 0) {
+ failf(data, "Cannot write a 0 size RTP packet.");
+ return CURLE_WRITE_ERROR;
+ }
+
+ /* If the user has configured CURLOPT_INTERLEAVEFUNCTION then use that
+ function and any configured CURLOPT_INTERLEAVEDATA to write out the RTP
+ data. Otherwise, use the CURLOPT_WRITEFUNCTION with the CURLOPT_WRITEDATA
+ pointer to write out the RTP data. */
+ if(data->set.fwrite_rtp) {
+ writeit = data->set.fwrite_rtp;
+ user_ptr = data->set.rtp_out;
+ }
+ else {
+ writeit = data->set.fwrite_func;
+ user_ptr = data->set.out;
+ }
+
+ Curl_set_in_callback(data, true);
+ wrote = writeit(ptr, 1, len, user_ptr);
+ Curl_set_in_callback(data, false);
+
+ if(CURL_WRITEFUNC_PAUSE == wrote) {
+ failf(data, "Cannot pause RTP");
+ return CURLE_WRITE_ERROR;
+ }
+
+ if(wrote != len) {
+ failf(data, "Failed writing RTP data");
+ return CURLE_WRITE_ERROR;
+ }
+
+ return CURLE_OK;
+}
+
+CURLcode Curl_rtsp_parseheader(struct Curl_easy *data, char *header)
+{
+ long CSeq = 0;
+
+ if(checkprefix("CSeq:", header)) {
+ /* Store the received CSeq. Match is verified in rtsp_done */
+ int nc = sscanf(&header[4], ": %ld", &CSeq);
+ if(nc == 1) {
+ struct RTSP *rtsp = data->req.p.rtsp;
+ rtsp->CSeq_recv = CSeq; /* mark the request */
+ data->state.rtsp_CSeq_recv = CSeq; /* update the handle */
+ }
+ else {
+ failf(data, "Unable to read the CSeq header: [%s]", header);
+ return CURLE_RTSP_CSEQ_ERROR;
+ }
+ }
+ else if(checkprefix("Session:", header)) {
+ char *start;
+ char *end;
+ size_t idlen;
+
+ /* Find the first non-space letter */
+ start = header + 8;
+ while(*start && ISBLANK(*start))
+ start++;
+
+ if(!*start) {
+ failf(data, "Got a blank Session ID");
+ return CURLE_RTSP_SESSION_ERROR;
+ }
+
+ /* Find the end of Session ID
+ *
+ * Allow any non whitespace content, up to the field separator or end of
+ * line. RFC 2326 isn't 100% clear on the session ID and for example
+ * gstreamer does url-encoded session ID's not covered by the standard.
+ */
+ end = start;
+ while(*end && *end != ';' && !ISSPACE(*end))
+ end++;
+ idlen = end - start;
+
+ if(data->set.str[STRING_RTSP_SESSION_ID]) {
+
+ /* If the Session ID is set, then compare */
+ if(strlen(data->set.str[STRING_RTSP_SESSION_ID]) != idlen ||
+ strncmp(start, data->set.str[STRING_RTSP_SESSION_ID], idlen) != 0) {
+ failf(data, "Got RTSP Session ID Line [%s], but wanted ID [%s]",
+ start, data->set.str[STRING_RTSP_SESSION_ID]);
+ return CURLE_RTSP_SESSION_ERROR;
+ }
+ }
+ else {
+ /* If the Session ID is not set, and we find it in a response, then set
+ * it.
+ */
+
+ /* Copy the id substring into a new buffer */
+ data->set.str[STRING_RTSP_SESSION_ID] = malloc(idlen + 1);
+ if(!data->set.str[STRING_RTSP_SESSION_ID])
+ return CURLE_OUT_OF_MEMORY;
+ memcpy(data->set.str[STRING_RTSP_SESSION_ID], start, idlen);
+ (data->set.str[STRING_RTSP_SESSION_ID])[idlen] = '\0';
+ }
+ }
+ return CURLE_OK;
+}
+
+#endif /* CURL_DISABLE_RTSP or using Hyper */
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-01 14:15:33 +0000