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- .\" generated by cd2nroff 0.1 from CURLINFO_PRIMARY_PORT.md
- .TH CURLINFO_PRIMARY_PORT 3 "2025-01-17" 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
- Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
- .SH SEE ALSO
- .BR CURLINFO_LOCAL_PORT (3),
- .BR CURLINFO_PRIMARY_IP (3),
- .BR curl_easy_getinfo (3),
- .BR curl_easy_setopt (3)
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