Man pages sections > man3 > CURLMOPT_SOCKETDATA

CURLMOPT_SOCKETDATA - custom pointer passed to the socket callback

CURLMOPT_SOCKETDATA(3) curl_multi_setopt options CURLMOPT_SOCKETDATA(3)

NAME

CURLMOPT_SOCKETDATA - custom pointer passed to the socket callback

SYNOPSIS

#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);

DESCRIPTION

A data pointer to pass to the socket callback set with the CURLMOPT_SOCKETFUNCTION(3) option.
 
This pointer will not be touched by libcurl but will only be passed in to the socket callbacks's userp argument.

DEFAULT

NULL

PROTOCOLS

All

EXAMPLE

static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
{
  GlobalInfo *g = (GlobalInfo*) cbp;
  SockInfo *fdp = (SockInfo*) sockp;
if(what == CURL_POLL_REMOVE) { remsock(fdp); } else { if(!fdp) { addsock(s, e, what, g); } else { setsock(fdp, s, e, what, g); } } return 0; }
main() { GlobalInfo setup; /* ... use socket callback and custom pointer */ curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb); curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup); }

AVAILABILITY

Added in 7.15.4

RETURN VALUE

Returns CURLM_OK.

SEE ALSO

CURLMOPT_SOCKETFUNCTION(3), curl_multi_socket_action(3), CURLMOPT_TIMERFUNCTION(3)
May 31, 2017 libcurl 7.55.1