c: Copyright (C) Daniel Stenberg, <daniel.se>, et al. SPDX-License-Identifier: curl Title: CURLMOPT_SOCKETDATA Section: 3 Source: libcurl See-also:
CURLMOPT_SOCKETDATA - custom pointer passed to the socket callback
#include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);
A data pointer to pass to the socket callback set with the CURLMOPT_SOCKETFUNCTION(3) option.
This pointer is not touched by libcurl but is only passed in as the socket callbacks's clientp argument.
NULL
All
struct priv { void *ours; }; static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp) { struct priv *p = sockp; printf("my ptr: %p\n", p->ours); if(what == CURL_POLL_REMOVE) { /* remove the socket from our collection */ } if(what & CURL_POLL_IN) { /* wait for read on this socket */ } if(what & CURL_POLL_OUT) { /* wait for write on this socket */ } return 0; } int main(void) { struct priv setup; CURLM *multi = curl_multi_init(); /* ... use socket callback and custom pointer */ curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb); curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup); }
Added in 7.15.4
Returns CURLM_OK.