Provided by: libcurl4-doc_7.65.3-1ubuntu3_all bug

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)