browser/external/curl-8.3.0/docs/libcurl/opts/CURLMOPT_SOCKETDATA.3
2023-09-27 13:43:06 -04:00

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.TH CURLMOPT_SOCKETDATA 3 "August 22, 2023" "ibcurl 8.3.0" libcurl
.SH NAME
CURLMOPT_SOCKETDATA \- custom pointer passed to the socket callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);
.SH DESCRIPTION
A data \fIpointer\fP to pass to the socket callback set with the
\fICURLMOPT_SOCKETFUNCTION(3)\fP option.
This pointer is not touched by libcurl but is only passed in as the socket
callbacks's \fBclientp\fP argument.
.SH DEFAULT
NULL
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
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);
}
.fi
.SH AVAILABILITY
Added in 7.15.4
.SH RETURN VALUE
Returns CURLM_OK.
.SH "SEE ALSO"
.BR CURLMOPT_SOCKETFUNCTION "(3), " curl_multi_socket_action "(3), "
.BR CURLMOPT_TIMERFUNCTION "(3) "