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CURLINFO_LOCAL_PORT(3) Library Functions Manual CURLINFO_LOCAL_PORT(3) NAME CURLINFO_LOCAL_PORT - latest local port number SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_PORT, long *portp); DESCRIPTION Pass a pointer to a long to receive the local port number of the most re- cent connection done with this curl handle. If the connection was done using QUIC, the port number is a UDP port num- ber, otherwise it is a TCP port number. If no connection was established or if the protocol does not use ports, -1 is returned. PROTOCOLS This functionality affects quic and tcp EXAMPLE int main(void) { CURL *curl; CURLcode result; curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); result = curl_easy_perform(curl); if(result == CURLE_OK) { long port; result = curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT, &port); if(result == CURLE_OK) { printf("We used local port: %ld\n", port); } } curl_easy_cleanup(curl); } return 0; } AVAILABILITY Added in curl 7.21.0 RETURN VALUE curl_easy_getinfo(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLINFO_LOCAL_IP(3), CURLINFO_PRIMARY_PORT(3), curl_easy_getinfo(3), curl_easy_setopt(3) libcurl 2026-06-11 CURLINFO_LOCAL_PORT(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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