curl/lib/rtsp.h
Stefan Eissing 7eb31c852d
RTSP: improved RTP parser
- fix HTTP header parsing to report incomplete
  lines it buffers as consumed!
- re-implement the RTP parser for interleave RTP
  messages for robustness. It is now keeping its
  state at the connection
- RTSP protocol handler "readwrite" implementation
  now tracks if the response is before/in/after
  header parsing or "in" a bod by calling
  "Curl_http_readwrite_headers()" itself. This
  allows it to know when non-RTP bytes are "junk"
  or HEADER or BODY.
- tested with #12035 and various small receive
  sizes where current master fails

Closes #12052
2023-10-21 14:38:21 +02:00

81 lines
2.4 KiB
C

#ifndef HEADER_CURL_RTSP_H
#define HEADER_CURL_RTSP_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#ifdef USE_HYPER
#define CURL_DISABLE_RTSP 1
#endif
#ifndef CURL_DISABLE_RTSP
extern const struct Curl_handler Curl_handler_rtsp;
CURLcode Curl_rtsp_parseheader(struct Curl_easy *data, char *header);
#else
/* disabled */
#define Curl_rtsp_parseheader(x,y) CURLE_NOT_BUILT_IN
#endif /* CURL_DISABLE_RTSP */
typedef enum {
RTP_PARSE_SKIP,
RTP_PARSE_CHANNEL,
RTP_PARSE_LEN,
RTP_PARSE_DATA
} rtp_parse_st;
/*
* RTSP Connection data
*
* Currently, only used for tracking incomplete RTP data reads
*/
struct rtsp_conn {
struct dynbuf buf;
int rtp_channel;
size_t rtp_len;
rtp_parse_st state;
BIT(in_header);
};
/****************************************************************************
* RTSP unique setup
***************************************************************************/
struct RTSP {
/*
* http_wrapper MUST be the first element of this structure for the wrap
* logic to work. In this way, we get a cheap polymorphism because
* &(data->state.proto.rtsp) == &(data->state.proto.http) per the C spec
*
* HTTP functions can safely treat this as an HTTP struct, but RTSP aware
* functions can also index into the later elements.
*/
struct HTTP http_wrapper; /* wrap HTTP to do the heavy lifting */
long CSeq_sent; /* CSeq of this request */
long CSeq_recv; /* CSeq received */
};
#endif /* HEADER_CURL_RTSP_H */