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CURLMOPT_SOCKETDATA

Section: curl_multi_setopt options (3)
Updated: May 31, 2017
Index Return to Main Contents

 

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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
DEFAULT
PROTOCOLS
EXAMPLE
AVAILABILITY
RETURN VALUE
SEE ALSO





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