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)