1040 lines
32 KiB
C
1040 lines
32 KiB
C
/***************************************************************************
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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) 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.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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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#if !defined(CURL_DISABLE_RTSP) && !defined(USE_HYPER)
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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 "cfilters.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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#define RTP_PKT_LENGTH(p) ((((unsigned int)((unsigned char)((p)[2]))) << 8) | \
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((unsigned 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 Curl_easy *data, bool *done);
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static CURLcode rtsp_done(struct Curl_easy *data, CURLcode, bool premature);
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static CURLcode rtsp_connect(struct Curl_easy *data, bool *done);
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static CURLcode rtsp_disconnect(struct Curl_easy *data,
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struct connectdata *conn, bool dead);
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static int rtsp_getsock_do(struct Curl_easy *data,
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struct connectdata *conn, curl_socket_t *socks);
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/*
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* Parse and write out an RTSP response.
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* @param data the transfer
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* @param conn the connection
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* @param buf data read from connection
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* @param blen amount of data in buf
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* @param is_eos TRUE iff this is the last write
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* @param readmore out, TRUE iff complete buf was consumed and more data
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* is needed
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*/
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static CURLcode rtsp_rtp_write_resp(struct Curl_easy *data,
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const char *buf,
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size_t blen,
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bool is_eos);
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static CURLcode rtsp_setup_connection(struct Curl_easy *data,
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struct connectdata *conn);
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static unsigned int rtsp_conncheck(struct Curl_easy *data,
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struct connectdata *check,
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unsigned int checks_to_perform);
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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 Curl_easy *data, struct connectdata *conn,
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curl_socket_t *socks)
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{
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/* write mode */
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(void)data;
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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 Curl_easy *data, const char *ptr, size_t len);
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static
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CURLcode rtsp_parse_transport(struct Curl_easy *data, char *transport);
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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_write_resp, /* write_resp */
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rtsp_conncheck, /* connection_check */
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ZERO_NULL, /* attach connection */
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PORT_RTSP, /* defport */
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CURLPROTO_RTSP, /* protocol */
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CURLPROTO_RTSP, /* family */
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PROTOPT_NONE /* flags */
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};
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#define MAX_RTP_BUFFERSIZE 1000000 /* arbitrary */
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static CURLcode rtsp_setup_connection(struct Curl_easy *data,
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struct connectdata *conn)
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{
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struct RTSP *rtsp;
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(void)conn;
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data->req.p.rtsp = 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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Curl_dyn_init(&conn->proto.rtspc.buf, MAX_RTP_BUFFERSIZE);
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return CURLE_OK;
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}
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/*
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* Function to check on various aspects of a connection.
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*/
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static unsigned int rtsp_conncheck(struct Curl_easy *data,
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struct connectdata *conn,
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unsigned int checks_to_perform)
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{
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unsigned int ret_val = CONNRESULT_NONE;
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(void)data;
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if(checks_to_perform & CONNCHECK_ISDEAD) {
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bool input_pending;
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if(!Curl_conn_is_alive(data, conn, &input_pending))
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ret_val |= CONNRESULT_DEAD;
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}
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return ret_val;
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}
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static CURLcode rtsp_connect(struct Curl_easy *data, bool *done)
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{
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CURLcode httpStatus;
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httpStatus = Curl_http_connect(data, 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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data->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 Curl_easy *data,
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struct connectdata *conn, bool dead)
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{
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(void) dead;
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(void) data;
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Curl_dyn_free(&conn->proto.rtspc.buf);
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return CURLE_OK;
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}
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static CURLcode rtsp_done(struct Curl_easy *data,
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CURLcode status, bool premature)
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{
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struct RTSP *rtsp = data->req.p.rtsp;
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CURLcode httpStatus;
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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(data, status, premature);
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if(rtsp && !status && !httpStatus) {
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/* Check the sequence numbers */
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long CSeq_sent = rtsp->CSeq_sent;
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long 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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(data->conn->proto.rtspc.rtp_channel == -1)) {
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infof(data, "Got an RTP Receive with a CSeq of %ld", CSeq_recv);
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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 Curl_easy *data, bool *done)
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{
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struct connectdata *conn = data->conn;
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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.p.rtsp;
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struct dynbuf req_buffer;
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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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/* Initialize a dynamic send buffer */
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Curl_dyn_init(&req_buffer, DYN_RTSP_REQ_HEADER);
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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 first_* fields to allow auth details get sent
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to this origin */
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if(!data->state.first_host) {
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data->state.first_host = strdup(conn->host.name);
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if(!data->state.first_host)
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return CURLE_OUT_OF_MEMORY;
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data->state.first_remote_port = conn->remote_port;
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data->state.first_remote_protocol = conn->handler->protocol;
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}
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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->req.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->req.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->req.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->req.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_xfer_setup(data, FIRSTSOCKET, -1, TRUE, -1);
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goto out;
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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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result = CURLE_BAD_FUNCTION_ARGUMENT;
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goto out;
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}
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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(data, STRCONST("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(data->state.aptr.rtsp_transport);
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data->state.aptr.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(!data->state.aptr.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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result = CURLE_BAD_FUNCTION_ARGUMENT;
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goto out;
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}
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p_transport = data->state.aptr.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(data, STRCONST("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(data, STRCONST("Accept-Encoding")) &&
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data->set.str[STRING_ENCODING]) {
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Curl_safefree(data->state.aptr.accept_encoding);
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data->state.aptr.accept_encoding =
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aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
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if(!data->state.aptr.accept_encoding) {
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result = CURLE_OUT_OF_MEMORY;
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goto out;
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}
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p_accept_encoding = data->state.aptr.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(data, STRCONST("User-Agent")) &&
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data->state.aptr.uagent) {
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Curl_safefree(data->state.aptr.uagent);
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}
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else if(!Curl_checkheaders(data, STRCONST("User-Agent")) &&
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data->set.str[STRING_USERAGENT]) {
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p_uagent = data->state.aptr.uagent;
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}
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/* setup the authentication headers */
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result = Curl_http_output_auth(data, conn, p_request, HTTPREQ_GET,
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p_stream_uri, FALSE);
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if(result)
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goto out;
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p_proxyuserpwd = data->state.aptr.proxyuserpwd;
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p_userpwd = data->state.aptr.userpwd;
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/* Referrer */
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Curl_safefree(data->state.aptr.ref);
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if(data->state.referer && !Curl_checkheaders(data, STRCONST("Referer")))
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data->state.aptr.ref = aprintf("Referer: %s\r\n", data->state.referer);
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p_referrer = data->state.aptr.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(data, STRCONST("Range")) && data->state.range) {
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Curl_safefree(data->state.aptr.rangeline);
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data->state.aptr.rangeline = aprintf("Range: %s\r\n", data->state.range);
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p_range = data->state.aptr.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(data, STRCONST("CSeq"))) {
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failf(data, "CSeq cannot be set as a custom header.");
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result = CURLE_RTSP_CSEQ_ERROR;
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goto out;
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}
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if(Curl_checkheaders(data, STRCONST("Session"))) {
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failf(data, "Session ID cannot be set as a custom header.");
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result = CURLE_BAD_FUNCTION_ARGUMENT;
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goto out;
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}
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result =
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Curl_dyn_addf(&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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goto out;
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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_dyn_addf(&req_buffer, "Session: %s\r\n", p_session_id);
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if(result)
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goto out;
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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_dyn_addf(&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(data->state.aptr.userpwd);
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if(result)
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goto out;
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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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goto out;
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}
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result = Curl_add_custom_headers(data, FALSE, &req_buffer);
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if(result)
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goto out;
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if(rtspreq == RTSPREQ_ANNOUNCE ||
|
|
rtspreq == RTSPREQ_SET_PARAMETER ||
|
|
rtspreq == RTSPREQ_GET_PARAMETER) {
|
|
curl_off_t req_clen; /* request content length */
|
|
|
|
if(data->state.upload) {
|
|
req_clen = data->state.infilesize;
|
|
data->state.httpreq = HTTPREQ_PUT;
|
|
result = Curl_creader_set_fread(data, req_clen);
|
|
if(result)
|
|
goto out;
|
|
}
|
|
else {
|
|
if(data->set.postfields) {
|
|
size_t plen = strlen(data->set.postfields);
|
|
req_clen = (curl_off_t)plen;
|
|
result = Curl_creader_set_buf(data, data->set.postfields, plen);
|
|
}
|
|
else if(data->state.infilesize >= 0) {
|
|
req_clen = data->state.infilesize;
|
|
result = Curl_creader_set_fread(data, req_clen);
|
|
}
|
|
else {
|
|
req_clen = 0;
|
|
result = Curl_creader_set_null(data);
|
|
}
|
|
if(result)
|
|
goto out;
|
|
}
|
|
|
|
if(req_clen > 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",
|
|
req_clen);
|
|
if(result)
|
|
goto out;
|
|
}
|
|
|
|
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)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
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)
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
else if(rtspreq == RTSPREQ_GET_PARAMETER) {
|
|
/* Check for an empty GET_PARAMETER (heartbeat) request */
|
|
data->state.httpreq = HTTPREQ_HEAD;
|
|
data->req.no_body = TRUE;
|
|
}
|
|
}
|
|
else {
|
|
result = Curl_creader_set_null(data);
|
|
if(result)
|
|
goto out;
|
|
}
|
|
|
|
/* Finish the request buffer */
|
|
result = Curl_dyn_addn(&req_buffer, STRCONST("\r\n"));
|
|
if(result)
|
|
goto out;
|
|
|
|
Curl_xfer_setup(data, FIRSTSOCKET, -1, TRUE, FIRSTSOCKET);
|
|
|
|
/* issue the request */
|
|
result = Curl_req_send(data, &req_buffer);
|
|
if(result) {
|
|
failf(data, "Failed sending RTSP request");
|
|
goto out;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
out:
|
|
Curl_dyn_free(&req_buffer);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* write any BODY bytes missing to the client, ignore the rest.
|
|
*/
|
|
static CURLcode rtp_write_body_junk(struct Curl_easy *data,
|
|
const char *buf,
|
|
size_t blen)
|
|
{
|
|
struct rtsp_conn *rtspc = &(data->conn->proto.rtspc);
|
|
curl_off_t body_remain;
|
|
bool in_body;
|
|
|
|
in_body = (data->req.headerline && !rtspc->in_header) &&
|
|
(data->req.size >= 0) &&
|
|
(data->req.bytecount < data->req.size);
|
|
body_remain = in_body? (data->req.size - data->req.bytecount) : 0;
|
|
DEBUGASSERT(body_remain >= 0);
|
|
if(body_remain) {
|
|
if((curl_off_t)blen > body_remain)
|
|
blen = (size_t)body_remain;
|
|
return Curl_client_write(data, CLIENTWRITE_BODY, (char *)buf, blen);
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode rtsp_filter_rtp(struct Curl_easy *data,
|
|
const char *buf,
|
|
size_t blen,
|
|
size_t *pconsumed)
|
|
{
|
|
struct rtsp_conn *rtspc = &(data->conn->proto.rtspc);
|
|
CURLcode result = CURLE_OK;
|
|
size_t skip_len = 0;
|
|
|
|
*pconsumed = 0;
|
|
while(blen) {
|
|
bool in_body = (data->req.headerline && !rtspc->in_header) &&
|
|
(data->req.size >= 0) &&
|
|
(data->req.bytecount < data->req.size);
|
|
switch(rtspc->state) {
|
|
|
|
case RTP_PARSE_SKIP: {
|
|
DEBUGASSERT(Curl_dyn_len(&rtspc->buf) == 0);
|
|
while(blen && buf[0] != '$') {
|
|
if(!in_body && buf[0] == 'R' &&
|
|
data->set.rtspreq != RTSPREQ_RECEIVE) {
|
|
if(strncmp(buf, "RTSP/", (blen < 5) ? blen : 5) == 0) {
|
|
/* This could be the next response, no consume and return */
|
|
if(*pconsumed) {
|
|
DEBUGF(infof(data, "RTP rtsp_filter_rtp[SKIP] RTSP/ prefix, "
|
|
"skipping %zd bytes of junk", *pconsumed));
|
|
}
|
|
rtspc->state = RTP_PARSE_SKIP;
|
|
rtspc->in_header = TRUE;
|
|
goto out;
|
|
}
|
|
}
|
|
/* junk/BODY, consume without buffering */
|
|
*pconsumed += 1;
|
|
++buf;
|
|
--blen;
|
|
++skip_len;
|
|
}
|
|
if(blen && buf[0] == '$') {
|
|
/* possible start of an RTP message, buffer */
|
|
if(skip_len) {
|
|
/* end of junk/BODY bytes, flush */
|
|
result = rtp_write_body_junk(data,
|
|
(char *)(buf - skip_len), skip_len);
|
|
skip_len = 0;
|
|
if(result)
|
|
goto out;
|
|
}
|
|
if(Curl_dyn_addn(&rtspc->buf, buf, 1)) {
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
goto out;
|
|
}
|
|
*pconsumed += 1;
|
|
++buf;
|
|
--blen;
|
|
rtspc->state = RTP_PARSE_CHANNEL;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case RTP_PARSE_CHANNEL: {
|
|
int idx = ((unsigned char)buf[0]) / 8;
|
|
int off = ((unsigned char)buf[0]) % 8;
|
|
DEBUGASSERT(Curl_dyn_len(&rtspc->buf) == 1);
|
|
if(!(data->state.rtp_channel_mask[idx] & (1 << off))) {
|
|
/* invalid channel number, junk or BODY data */
|
|
rtspc->state = RTP_PARSE_SKIP;
|
|
DEBUGASSERT(skip_len == 0);
|
|
/* we do not consume this byte, it is BODY data */
|
|
DEBUGF(infof(data, "RTSP: invalid RTP channel %d, skipping", idx));
|
|
if(*pconsumed == 0) {
|
|
/* We did not consume the initial '$' in our buffer, but had
|
|
* it from an earlier call. We cannot un-consume it and have
|
|
* to write it directly as BODY data */
|
|
result = rtp_write_body_junk(data, Curl_dyn_ptr(&rtspc->buf), 1);
|
|
if(result)
|
|
goto out;
|
|
}
|
|
else {
|
|
/* count the '$' as skip and continue */
|
|
skip_len = 1;
|
|
}
|
|
Curl_dyn_free(&rtspc->buf);
|
|
break;
|
|
}
|
|
/* a valid channel, so we expect this to be a real RTP message */
|
|
rtspc->rtp_channel = (unsigned char)buf[0];
|
|
if(Curl_dyn_addn(&rtspc->buf, buf, 1)) {
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
goto out;
|
|
}
|
|
*pconsumed += 1;
|
|
++buf;
|
|
--blen;
|
|
rtspc->state = RTP_PARSE_LEN;
|
|
break;
|
|
}
|
|
|
|
case RTP_PARSE_LEN: {
|
|
size_t rtp_len = Curl_dyn_len(&rtspc->buf);
|
|
const char *rtp_buf;
|
|
DEBUGASSERT(rtp_len >= 2 && rtp_len < 4);
|
|
if(Curl_dyn_addn(&rtspc->buf, buf, 1)) {
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
goto out;
|
|
}
|
|
*pconsumed += 1;
|
|
++buf;
|
|
--blen;
|
|
if(rtp_len == 2)
|
|
break;
|
|
rtp_buf = Curl_dyn_ptr(&rtspc->buf);
|
|
rtspc->rtp_len = RTP_PKT_LENGTH(rtp_buf) + 4;
|
|
rtspc->state = RTP_PARSE_DATA;
|
|
break;
|
|
}
|
|
|
|
case RTP_PARSE_DATA: {
|
|
size_t rtp_len = Curl_dyn_len(&rtspc->buf);
|
|
size_t needed;
|
|
DEBUGASSERT(rtp_len < rtspc->rtp_len);
|
|
needed = rtspc->rtp_len - rtp_len;
|
|
if(needed <= blen) {
|
|
if(Curl_dyn_addn(&rtspc->buf, buf, needed)) {
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
goto out;
|
|
}
|
|
*pconsumed += needed;
|
|
buf += needed;
|
|
blen -= needed;
|
|
/* complete RTP message in buffer */
|
|
DEBUGF(infof(data, "RTP write channel %d rtp_len %zu",
|
|
rtspc->rtp_channel, rtspc->rtp_len));
|
|
result = rtp_client_write(data, Curl_dyn_ptr(&rtspc->buf),
|
|
rtspc->rtp_len);
|
|
Curl_dyn_free(&rtspc->buf);
|
|
rtspc->state = RTP_PARSE_SKIP;
|
|
if(result)
|
|
goto out;
|
|
}
|
|
else {
|
|
if(Curl_dyn_addn(&rtspc->buf, buf, blen)) {
|
|
result = CURLE_OUT_OF_MEMORY;
|
|
goto out;
|
|
}
|
|
*pconsumed += blen;
|
|
buf += blen;
|
|
blen = 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
DEBUGASSERT(0);
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
}
|
|
out:
|
|
if(!result && skip_len)
|
|
result = rtp_write_body_junk(data, (char *)(buf - skip_len), skip_len);
|
|
return result;
|
|
}
|
|
|
|
static CURLcode rtsp_rtp_write_resp(struct Curl_easy *data,
|
|
const char *buf,
|
|
size_t blen,
|
|
bool is_eos)
|
|
{
|
|
struct rtsp_conn *rtspc = &(data->conn->proto.rtspc);
|
|
CURLcode result = CURLE_OK;
|
|
size_t consumed = 0;
|
|
|
|
if(!data->req.header)
|
|
rtspc->in_header = FALSE;
|
|
if(!blen) {
|
|
goto out;
|
|
}
|
|
|
|
DEBUGF(infof(data, "rtsp_rtp_write_resp(len=%zu, in_header=%d, eos=%d)",
|
|
blen, rtspc->in_header, is_eos));
|
|
|
|
/* If header parsing is not onging, extract RTP messages */
|
|
if(!rtspc->in_header) {
|
|
result = rtsp_filter_rtp(data, buf, blen, &consumed);
|
|
if(result)
|
|
goto out;
|
|
buf += consumed;
|
|
blen -= consumed;
|
|
/* either we consumed all or are at the start of header parsing */
|
|
if(blen && !data->req.header)
|
|
DEBUGF(infof(data, "RTSP: %zu bytes, possibly excess in response body",
|
|
blen));
|
|
}
|
|
|
|
/* we want to parse headers, do so */
|
|
if(data->req.header && blen) {
|
|
rtspc->in_header = TRUE;
|
|
result = Curl_http_write_resp_hds(data, buf, blen, &consumed);
|
|
if(result)
|
|
goto out;
|
|
|
|
buf += consumed;
|
|
blen -= consumed;
|
|
|
|
if(!data->req.header)
|
|
rtspc->in_header = FALSE;
|
|
|
|
if(!rtspc->in_header) {
|
|
/* If header parsing is done, extract interleaved RTP messages */
|
|
if(data->req.size <= -1) {
|
|
/* Respect section 4.4 of rfc2326: If the Content-Length header is
|
|
absent, a length 0 must be assumed. */
|
|
data->req.size = 0;
|
|
data->req.download_done = TRUE;
|
|
}
|
|
result = rtsp_filter_rtp(data, buf, blen, &consumed);
|
|
if(result)
|
|
goto out;
|
|
blen -= consumed;
|
|
}
|
|
}
|
|
|
|
if(rtspc->state != RTP_PARSE_SKIP)
|
|
data->req.done = FALSE;
|
|
/* we SHOULD have consumed all bytes, unless the response is borked.
|
|
* In which case we write out the left over bytes, letting the client
|
|
* writer deal with it (it will report EXCESS and fail the transfer). */
|
|
DEBUGF(infof(data, "rtsp_rtp_write_resp(len=%zu, in_header=%d, done=%d "
|
|
" rtspc->state=%d, req.size=%" CURL_FORMAT_CURL_OFF_T ")",
|
|
blen, rtspc->in_header, data->req.done, rtspc->state,
|
|
data->req.size));
|
|
if(!result && (is_eos || blen)) {
|
|
result = Curl_client_write(data, CLIENTWRITE_BODY|
|
|
(is_eos? CLIENTWRITE_EOS:0),
|
|
(char *)buf, blen);
|
|
}
|
|
|
|
out:
|
|
if((data->set.rtspreq == RTSPREQ_RECEIVE) &&
|
|
(rtspc->state == RTP_PARSE_SKIP)) {
|
|
/* In special mode RECEIVE, we just process one chunk of network
|
|
* data, so we stop the transfer here, if we have no incomplete
|
|
* RTP message pending. */
|
|
data->req.download_done = TRUE;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static
|
|
CURLcode rtp_client_write(struct Curl_easy *data, const 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((char *)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)
|
|
{
|
|
if(checkprefix("CSeq:", header)) {
|
|
long CSeq = 0;
|
|
char *endp;
|
|
char *p = &header[5];
|
|
while(ISBLANK(*p))
|
|
p++;
|
|
CSeq = strtol(p, &endp, 10);
|
|
if(p != endp) {
|
|
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)) {
|
|
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] = Curl_memdup0(start, idlen);
|
|
if(!data->set.str[STRING_RTSP_SESSION_ID])
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
else if(checkprefix("Transport:", header)) {
|
|
CURLcode result;
|
|
result = rtsp_parse_transport(data, header + 10);
|
|
if(result)
|
|
return result;
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static
|
|
CURLcode rtsp_parse_transport(struct Curl_easy *data, char *transport)
|
|
{
|
|
/* If we receive multiple Transport response-headers, the linterleaved
|
|
channels of each response header is recorded and used together for
|
|
subsequent data validity checks.*/
|
|
/* e.g.: ' RTP/AVP/TCP;unicast;interleaved=5-6' */
|
|
char *start;
|
|
char *end;
|
|
start = transport;
|
|
while(start && *start) {
|
|
while(*start && ISBLANK(*start) )
|
|
start++;
|
|
end = strchr(start, ';');
|
|
if(checkprefix("interleaved=", start)) {
|
|
long chan1, chan2, chan;
|
|
char *endp;
|
|
char *p = start + 12;
|
|
chan1 = strtol(p, &endp, 10);
|
|
if(p != endp && chan1 >= 0 && chan1 <= 255) {
|
|
unsigned char *rtp_channel_mask = data->state.rtp_channel_mask;
|
|
chan2 = chan1;
|
|
if(*endp == '-') {
|
|
p = endp + 1;
|
|
chan2 = strtol(p, &endp, 10);
|
|
if(p == endp || chan2 < 0 || chan2 > 255) {
|
|
infof(data, "Unable to read the interleaved parameter from "
|
|
"Transport header: [%s]", transport);
|
|
chan2 = chan1;
|
|
}
|
|
}
|
|
for(chan = chan1; chan <= chan2; chan++) {
|
|
long idx = chan / 8;
|
|
long off = chan % 8;
|
|
rtp_channel_mask[idx] |= (unsigned char)(1 << off);
|
|
}
|
|
}
|
|
else {
|
|
infof(data, "Unable to read the interleaved parameter from "
|
|
"Transport header: [%s]", transport);
|
|
}
|
|
break;
|
|
}
|
|
/* skip to next parameter */
|
|
start = (!end) ? end : (end + 1);
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
|
|
#endif /* CURL_DISABLE_RTSP or using Hyper */
|