curl-w32/docs/libcurl/opts/CURLOPT_RTSP_SESSION_ID.md

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---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_RTSP_SESSION_ID
Section: 3
Source: libcurl
See-also:
- CURLOPT_RTSP_REQUEST (3)
- CURLOPT_RTSP_STREAM_URI (3)
---
# NAME
CURLOPT_RTSP_SESSION_ID - RTSP session ID
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RTSP_SESSION_ID, char *id);
~~~
# DESCRIPTION
Pass a char pointer as a parameter to set the value of the current RTSP
Session ID for the handle. Useful for resuming an in-progress session. Once
this value is set to any non-NULL value, libcurl returns
*CURLE_RTSP_SESSION_ERROR* if ID received from the server does not match. If
unset (or set to NULL), libcurl automatically sets the ID the first time the
server sets it in a response.
The application does not have to keep the string around after setting this
option.
# DEFAULT
NULL
# PROTOCOLS
RTSP
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
char *prev_id; /* saved from before somehow */
curl_easy_setopt(curl, CURLOPT_URL, "rtsp://example.com/");
curl_easy_setopt(curl, CURLOPT_RTSP_SESSION_ID, prev_id);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
~~~
# AVAILABILITY
Added in 7.20.0
# RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.