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816 lines
24 KiB
816 lines
24 KiB
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifndef CURL_DISABLE_RTSP
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#include "urldata.h"
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#include <curl/curl.h>
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#include "transfer.h"
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#include "sendf.h"
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#include "multiif.h"
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#include "http.h"
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#include "url.h"
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#include "progress.h"
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#include "rtsp.h"
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#include "strcase.h"
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#include "select.h"
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#include "connect.h"
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#include "strdup.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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/*
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* TODO (general)
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* -incoming server requests
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* -server CSeq counter
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* -digest authentication
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* -connect thru proxy
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* -pipelining?
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*/
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#define RTP_PKT_CHANNEL(p) ((int)((unsigned char)((p)[1])))
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#define RTP_PKT_LENGTH(p) ((((int)((unsigned char)((p)[2]))) << 8) | \
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((int)((unsigned char)((p)[3]))))
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/* protocol-specific functions set up to be called by the main engine */
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static CURLcode rtsp_do(struct connectdata *conn, bool *done);
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static CURLcode rtsp_done(struct connectdata *conn, CURLcode, bool premature);
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static CURLcode rtsp_connect(struct connectdata *conn, bool *done);
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static CURLcode rtsp_disconnect(struct connectdata *conn, bool dead);
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static int rtsp_getsock_do(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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/*
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* Parse and write out any available RTP data.
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*
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* nread: amount of data left after k->str. will be modified if RTP
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* data is parsed and k->str is moved up
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* readmore: whether or not the RTP parser needs more data right away
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*/
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static CURLcode rtsp_rtp_readwrite(struct Curl_easy *data,
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struct connectdata *conn,
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ssize_t *nread,
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bool *readmore);
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static CURLcode rtsp_setup_connection(struct connectdata *conn);
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/* this returns the socket to wait for in the DO and DOING state for the multi
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interface and then we're always _sending_ a request and thus we wait for
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the single socket to become writable only */
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static int rtsp_getsock_do(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks)
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{
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/* write mode */
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(void)numsocks; /* unused, we trust it to be at least 1 */
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socks[0] = conn->sock[FIRSTSOCKET];
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return GETSOCK_WRITESOCK(0);
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}
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static
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CURLcode rtp_client_write(struct connectdata *conn, char *ptr, size_t len);
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/*
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* RTSP handler interface.
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*/
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const struct Curl_handler Curl_handler_rtsp = {
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"RTSP", /* scheme */
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rtsp_setup_connection, /* setup_connection */
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rtsp_do, /* do_it */
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rtsp_done, /* done */
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ZERO_NULL, /* do_more */
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rtsp_connect, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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rtsp_getsock_do, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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rtsp_disconnect, /* disconnect */
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rtsp_rtp_readwrite, /* readwrite */
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PORT_RTSP, /* defport */
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CURLPROTO_RTSP, /* protocol */
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PROTOPT_NONE /* flags */
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};
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static CURLcode rtsp_setup_connection(struct connectdata *conn)
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{
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struct RTSP *rtsp;
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conn->data->req.protop = rtsp = calloc(1, sizeof(struct RTSP));
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if(!rtsp)
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return CURLE_OUT_OF_MEMORY;
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return CURLE_OK;
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}
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/*
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* The server may send us RTP data at any point, and RTSPREQ_RECEIVE does not
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* want to block the application forever while receiving a stream. Therefore,
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* we cannot assume that an RTSP socket is dead just because it is readable.
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*
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* Instead, if it is readable, run Curl_connalive() to peek at the socket
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* and distinguish between closed and data.
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*/
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bool Curl_rtsp_connisdead(struct connectdata *check)
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{
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int sval;
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bool ret_val = TRUE;
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sval = SOCKET_READABLE(check->sock[FIRSTSOCKET], 0);
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if(sval == 0) {
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/* timeout */
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ret_val = FALSE;
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}
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else if(sval & CURL_CSELECT_ERR) {
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/* socket is in an error state */
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ret_val = TRUE;
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}
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else if(sval & CURL_CSELECT_IN) {
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/* readable with no error. could still be closed */
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ret_val = !Curl_connalive(check);
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}
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return ret_val;
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}
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static CURLcode rtsp_connect(struct connectdata *conn, bool *done)
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{
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CURLcode httpStatus;
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struct Curl_easy *data = conn->data;
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httpStatus = Curl_http_connect(conn, done);
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/* Initialize the CSeq if not already done */
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if(data->state.rtsp_next_client_CSeq == 0)
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data->state.rtsp_next_client_CSeq = 1;
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if(data->state.rtsp_next_server_CSeq == 0)
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data->state.rtsp_next_server_CSeq = 1;
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conn->proto.rtspc.rtp_channel = -1;
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return httpStatus;
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}
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static CURLcode rtsp_disconnect(struct connectdata *conn, bool dead)
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{
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(void) dead;
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Curl_safefree(conn->proto.rtspc.rtp_buf);
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return CURLE_OK;
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}
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static CURLcode rtsp_done(struct connectdata *conn,
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CURLcode status, bool premature)
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{
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struct Curl_easy *data = conn->data;
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struct RTSP *rtsp = data->req.protop;
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CURLcode httpStatus;
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long CSeq_sent;
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long CSeq_recv;
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/* Bypass HTTP empty-reply checks on receive */
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if(data->set.rtspreq == RTSPREQ_RECEIVE)
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premature = TRUE;
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httpStatus = Curl_http_done(conn, status, premature);
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if(rtsp) {
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/* Check the sequence numbers */
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CSeq_sent = rtsp->CSeq_sent;
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CSeq_recv = rtsp->CSeq_recv;
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if((data->set.rtspreq != RTSPREQ_RECEIVE) && (CSeq_sent != CSeq_recv)) {
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failf(data,
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"The CSeq of this request %ld did not match the response %ld",
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CSeq_sent, CSeq_recv);
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return CURLE_RTSP_CSEQ_ERROR;
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}
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if(data->set.rtspreq == RTSPREQ_RECEIVE &&
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(conn->proto.rtspc.rtp_channel == -1)) {
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infof(data, "Got an RTP Receive with a CSeq of %ld\n", CSeq_recv);
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/* TODO CPC: Server -> Client logic here */
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}
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}
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return httpStatus;
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}
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static CURLcode rtsp_do(struct connectdata *conn, bool *done)
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{
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struct Curl_easy *data = conn->data;
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CURLcode result=CURLE_OK;
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Curl_RtspReq rtspreq = data->set.rtspreq;
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struct RTSP *rtsp = data->req.protop;
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struct HTTP *http;
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Curl_send_buffer *req_buffer;
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curl_off_t postsize = 0; /* for ANNOUNCE and SET_PARAMETER */
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curl_off_t putsize = 0; /* for ANNOUNCE and SET_PARAMETER */
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const char *p_request = NULL;
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const char *p_session_id = NULL;
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const char *p_accept = NULL;
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const char *p_accept_encoding = NULL;
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const char *p_range = NULL;
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const char *p_referrer = NULL;
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const char *p_stream_uri = NULL;
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const char *p_transport = NULL;
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const char *p_uagent = NULL;
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const char *p_proxyuserpwd = NULL;
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const char *p_userpwd = NULL;
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*done = TRUE;
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http = &(rtsp->http_wrapper);
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/* Assert that no one has changed the RTSP struct in an evil way */
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DEBUGASSERT((void *)http == (void *)rtsp);
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rtsp->CSeq_sent = data->state.rtsp_next_client_CSeq;
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rtsp->CSeq_recv = 0;
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/* Setup the 'p_request' pointer to the proper p_request string
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* Since all RTSP requests are included here, there is no need to
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* support custom requests like HTTP.
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**/
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data->set.opt_no_body = TRUE; /* most requests don't contain a body */
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switch(rtspreq) {
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default:
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failf(data, "Got invalid RTSP request");
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return CURLE_BAD_FUNCTION_ARGUMENT;
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case RTSPREQ_OPTIONS:
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p_request = "OPTIONS";
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break;
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case RTSPREQ_DESCRIBE:
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p_request = "DESCRIBE";
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data->set.opt_no_body = FALSE;
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break;
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case RTSPREQ_ANNOUNCE:
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p_request = "ANNOUNCE";
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break;
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case RTSPREQ_SETUP:
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p_request = "SETUP";
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break;
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case RTSPREQ_PLAY:
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p_request = "PLAY";
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break;
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case RTSPREQ_PAUSE:
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p_request = "PAUSE";
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break;
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case RTSPREQ_TEARDOWN:
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p_request = "TEARDOWN";
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break;
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case RTSPREQ_GET_PARAMETER:
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/* GET_PARAMETER's no_body status is determined later */
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p_request = "GET_PARAMETER";
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data->set.opt_no_body = FALSE;
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break;
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case RTSPREQ_SET_PARAMETER:
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p_request = "SET_PARAMETER";
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break;
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case RTSPREQ_RECORD:
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p_request = "RECORD";
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break;
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case RTSPREQ_RECEIVE:
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p_request = "";
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/* Treat interleaved RTP as body*/
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data->set.opt_no_body = FALSE;
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break;
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case RTSPREQ_LAST:
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failf(data, "Got invalid RTSP request: RTSPREQ_LAST");
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return CURLE_BAD_FUNCTION_ARGUMENT;
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}
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if(rtspreq == RTSPREQ_RECEIVE) {
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Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
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&http->readbytecount, -1, NULL);
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return result;
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}
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p_session_id = data->set.str[STRING_RTSP_SESSION_ID];
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if(!p_session_id &&
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(rtspreq & ~(RTSPREQ_OPTIONS | RTSPREQ_DESCRIBE | RTSPREQ_SETUP))) {
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failf(data, "Refusing to issue an RTSP request [%s] without a session ID.",
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p_request);
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return CURLE_BAD_FUNCTION_ARGUMENT;
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}
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/* TODO: proxy? */
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/* Stream URI. Default to server '*' if not specified */
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if(data->set.str[STRING_RTSP_STREAM_URI]) {
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p_stream_uri = data->set.str[STRING_RTSP_STREAM_URI];
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}
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else {
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p_stream_uri = "*";
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}
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/* Transport Header for SETUP requests */
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p_transport = Curl_checkheaders(conn, "Transport:");
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if(rtspreq == RTSPREQ_SETUP && !p_transport) {
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/* New Transport: setting? */
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if(data->set.str[STRING_RTSP_TRANSPORT]) {
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Curl_safefree(conn->allocptr.rtsp_transport);
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conn->allocptr.rtsp_transport =
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aprintf("Transport: %s\r\n",
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data->set.str[STRING_RTSP_TRANSPORT]);
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if(!conn->allocptr.rtsp_transport)
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return CURLE_OUT_OF_MEMORY;
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}
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else {
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failf(data,
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"Refusing to issue an RTSP SETUP without a Transport: header.");
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return CURLE_BAD_FUNCTION_ARGUMENT;
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}
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p_transport = conn->allocptr.rtsp_transport;
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}
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/* Accept Headers for DESCRIBE requests */
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if(rtspreq == RTSPREQ_DESCRIBE) {
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/* Accept Header */
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p_accept = Curl_checkheaders(conn, "Accept:")?
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NULL:"Accept: application/sdp\r\n";
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/* Accept-Encoding header */
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if(!Curl_checkheaders(conn, "Accept-Encoding:") &&
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data->set.str[STRING_ENCODING]) {
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Curl_safefree(conn->allocptr.accept_encoding);
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conn->allocptr.accept_encoding =
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aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
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if(!conn->allocptr.accept_encoding)
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return CURLE_OUT_OF_MEMORY;
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p_accept_encoding = conn->allocptr.accept_encoding;
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}
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}
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/* The User-Agent string might have been allocated in url.c already, because
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it might have been used in the proxy connect, but if we have got a header
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with the user-agent string specified, we erase the previously made string
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here. */
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if(Curl_checkheaders(conn, "User-Agent:") && conn->allocptr.uagent) {
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Curl_safefree(conn->allocptr.uagent);
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conn->allocptr.uagent = NULL;
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}
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else if(!Curl_checkheaders(conn, "User-Agent:") &&
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data->set.str[STRING_USERAGENT]) {
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p_uagent = conn->allocptr.uagent;
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}
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/* setup the authentication headers */
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result = Curl_http_output_auth(conn, p_request, p_stream_uri, FALSE);
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if(result)
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return result;
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p_proxyuserpwd = conn->allocptr.proxyuserpwd;
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p_userpwd = conn->allocptr.userpwd;
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/* Referrer */
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Curl_safefree(conn->allocptr.ref);
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if(data->change.referer && !Curl_checkheaders(conn, "Referer:"))
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conn->allocptr.ref = aprintf("Referer: %s\r\n", data->change.referer);
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else
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conn->allocptr.ref = NULL;
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p_referrer = conn->allocptr.ref;
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/*
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* Range Header
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* Only applies to PLAY, PAUSE, RECORD
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*
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* Go ahead and use the Range stuff supplied for HTTP
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*/
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if(data->state.use_range &&
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(rtspreq & (RTSPREQ_PLAY | RTSPREQ_PAUSE | RTSPREQ_RECORD))) {
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/* Check to see if there is a range set in the custom headers */
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if(!Curl_checkheaders(conn, "Range:") && data->state.range) {
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Curl_safefree(conn->allocptr.rangeline);
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conn->allocptr.rangeline = aprintf("Range: %s\r\n", data->state.range);
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p_range = conn->allocptr.rangeline;
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}
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}
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/*
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* Sanity check the custom headers
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*/
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if(Curl_checkheaders(conn, "CSeq:")) {
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failf(data, "CSeq cannot be set as a custom header.");
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return CURLE_RTSP_CSEQ_ERROR;
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}
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if(Curl_checkheaders(conn, "Session:")) {
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failf(data, "Session ID cannot be set as a custom header.");
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return CURLE_BAD_FUNCTION_ARGUMENT;
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}
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/* Initialize a dynamic send buffer */
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req_buffer = Curl_add_buffer_init();
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if(!req_buffer)
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return CURLE_OUT_OF_MEMORY;
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result =
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Curl_add_bufferf(req_buffer,
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"%s %s RTSP/1.0\r\n" /* Request Stream-URI RTSP/1.0 */
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"CSeq: %ld\r\n", /* CSeq */
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p_request, p_stream_uri, rtsp->CSeq_sent);
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if(result)
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return result;
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/*
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* Rather than do a normal alloc line, keep the session_id unformatted
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* to make comparison easier
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*/
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if(p_session_id) {
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result = Curl_add_bufferf(req_buffer, "Session: %s\r\n", p_session_id);
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if(result)
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return result;
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}
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/*
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* Shared HTTP-like options
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*/
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result = Curl_add_bufferf(req_buffer,
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"%s" /* transport */
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"%s" /* accept */
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"%s" /* accept-encoding */
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"%s" /* range */
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"%s" /* referrer */
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"%s" /* user-agent */
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"%s" /* proxyuserpwd */
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"%s" /* userpwd */
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,
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p_transport ? p_transport : "",
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p_accept ? p_accept : "",
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p_accept_encoding ? p_accept_encoding : "",
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p_range ? p_range : "",
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p_referrer ? p_referrer : "",
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p_uagent ? p_uagent : "",
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p_proxyuserpwd ? p_proxyuserpwd : "",
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p_userpwd ? p_userpwd : "");
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/*
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* Free userpwd now --- cannot reuse this for Negotiate and possibly NTLM
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* with basic and digest, it will be freed anyway by the next request
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*/
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Curl_safefree(conn->allocptr.userpwd);
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conn->allocptr.userpwd = NULL;
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if(result)
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return result;
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if((rtspreq == RTSPREQ_SETUP) || (rtspreq == RTSPREQ_DESCRIBE)) {
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result = Curl_add_timecondition(data, req_buffer);
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if(result)
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return result;
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}
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result = Curl_add_custom_headers(conn, FALSE, req_buffer);
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|
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->set.httpreq = HTTPREQ_PUT;
|
|
|
|
}
|
|
else {
|
|
postsize = (data->state.infilesize != -1)?
|
|
data->state.infilesize:
|
|
(data->set.postfields? (curl_off_t)strlen(data->set.postfields):0);
|
|
data->set.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(conn, "Content-Length:")) {
|
|
result = Curl_add_bufferf(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(conn, "Content-Type:")) {
|
|
result = Curl_add_bufferf(req_buffer,
|
|
"Content-Type: text/parameters\r\n");
|
|
if(result)
|
|
return result;
|
|
}
|
|
}
|
|
|
|
if(rtspreq == RTSPREQ_ANNOUNCE) {
|
|
if(!Curl_checkheaders(conn, "Content-Type:")) {
|
|
result = Curl_add_bufferf(req_buffer,
|
|
"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->set.httpreq = HTTPREQ_HEAD;
|
|
data->set.opt_no_body = TRUE;
|
|
}
|
|
}
|
|
|
|
/* RTSP never allows chunked transfer */
|
|
data->req.forbidchunk = TRUE;
|
|
/* Finish the request buffer */
|
|
result = Curl_add_buffer(req_buffer, "\r\n", 2);
|
|
if(result)
|
|
return result;
|
|
|
|
if(postsize > 0) {
|
|
result = Curl_add_buffer(req_buffer, data->set.postfields,
|
|
(size_t)postsize);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
/* issue the request */
|
|
result = Curl_add_buffer_send(req_buffer, conn,
|
|
&data->info.request_size, 0, FIRSTSOCKET);
|
|
if(result) {
|
|
failf(data, "Failed sending RTSP request");
|
|
return result;
|
|
}
|
|
|
|
Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE, &http->readbytecount,
|
|
putsize?FIRSTSOCKET:-1,
|
|
putsize?&http->writebytecount:NULL);
|
|
|
|
/* Increment the CSeq on success */
|
|
data->state.rtsp_next_client_CSeq++;
|
|
|
|
if(http->writebytecount) {
|
|
/* if a request-body has been sent off, we make sure this progress is
|
|
noted properly */
|
|
Curl_pgrsSetUploadCounter(data, http->writebytecount);
|
|
if(Curl_pgrsUpdate(conn))
|
|
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\n",
|
|
rtspc->rtp_channel, rtp_length));
|
|
result = rtp_client_write(conn, &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 != 0 && rtp[0] == '$') {
|
|
DEBUGF(infof(data, "RTP Rewinding %zd %s\n", 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 connectdata *conn, char *ptr, size_t len)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
size_t wrote;
|
|
curl_write_callback writeit;
|
|
|
|
if(len == 0) {
|
|
failf(data, "Cannot write a 0 size RTP packet.");
|
|
return CURLE_WRITE_ERROR;
|
|
}
|
|
|
|
writeit = data->set.fwrite_rtp?data->set.fwrite_rtp:data->set.fwrite_func;
|
|
wrote = writeit(ptr, 1, len, data->set.rtp_out);
|
|
|
|
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 connectdata *conn,
|
|
char *header)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
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.protop;
|
|
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;
|
|
|
|
/* Find the first non-space letter */
|
|
start = header + 8;
|
|
while(*start && ISSPACE(*start))
|
|
start++;
|
|
|
|
if(!*start) {
|
|
failf(data, "Got a blank Session ID");
|
|
}
|
|
else if(data->set.str[STRING_RTSP_SESSION_ID]) {
|
|
/* If the Session ID is set, then compare */
|
|
if(strncmp(start, data->set.str[STRING_RTSP_SESSION_ID],
|
|
strlen(data->set.str[STRING_RTSP_SESSION_ID])) != 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
char *end = start;
|
|
while(*end && *end != ';' && !ISSPACE(*end))
|
|
end++;
|
|
|
|
/* Copy the id substring into a new buffer */
|
|
data->set.str[STRING_RTSP_SESSION_ID] = malloc(end - start + 1);
|
|
if(data->set.str[STRING_RTSP_SESSION_ID] == NULL)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
memcpy(data->set.str[STRING_RTSP_SESSION_ID], start, end - start);
|
|
(data->set.str[STRING_RTSP_SESSION_ID])[end - start] = '\0';
|
|
}
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#endif /* CURL_DISABLE_RTSP */
|