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.\" generated by cd2nroff 0.1 from CURLINFO_PRIMARY_PORT.md
.TH CURLINFO_PRIMARY_PORT 3 "2025-06-06" libcurl
.SH NAME
CURLINFO_PRIMARY_PORT \- get the latest destination port number
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRIMARY_PORT, long *portp);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the destination port of the most recent
connection done with this \fBcurl\fP handle.
This is the destination port of the actual TCP or UDP connection libcurl used.
If a proxy was used for the most recent transfer, this is the port number of
the proxy, if no proxy was used it is the port number of the most recently
accessed URL.
.SH PROTOCOLS
This functionality affects all supported protocols
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long port;
res = curl_easy_getinfo(curl, CURLINFO_PRIMARY_PORT, &port);
if(!res)
printf("Connected to remote port: %ld\\n", port);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.21.0
.SH RETURN VALUE
\fIcurl_easy_getinfo(3)\fP returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR CURLINFO_LOCAL_PORT (3),
.BR CURLINFO_PRIMARY_IP (3),
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3)