1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: CURLINFO_LOCAL_PORT 5Section: 3 6Source: libcurl 7Protocol: 8 - TCP 9 - QUIC 10See-also: 11 - CURLINFO_LOCAL_IP (3) 12 - CURLINFO_PRIMARY_PORT (3) 13 - curl_easy_getinfo (3) 14 - curl_easy_setopt (3) 15Added-in: 7.21.0 16--- 17 18# NAME 19 20CURLINFO_LOCAL_PORT - get the latest local port number 21 22# SYNOPSIS 23 24~~~c 25#include <curl/curl.h> 26 27CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_PORT, long *portp); 28~~~ 29 30# DESCRIPTION 31 32Pass a pointer to a long to receive the local port number of the most recent 33connection done with this **curl** handle. 34 35If the connection was done using QUIC, the port number is a UDP port number, 36otherwise it is a TCP port number. 37 38# %PROTOCOLS% 39 40# EXAMPLE 41 42~~~c 43int main(void) 44{ 45 CURL *curl; 46 CURLcode res; 47 48 curl = curl_easy_init(); 49 if(curl) { 50 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); 51 res = curl_easy_perform(curl); 52 53 if(CURLE_OK == res) { 54 long port; 55 res = curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT, &port); 56 57 if(CURLE_OK == res) { 58 printf("We used local port: %ld\n", port); 59 } 60 } 61 curl_easy_cleanup(curl); 62 } 63 return 0; 64} 65~~~ 66 67# %AVAILABILITY% 68 69# RETURN VALUE 70 71curl_easy_getinfo(3) returns a CURLcode indicating success or error. 72 73CURLE_OK (0) means everything was OK, non-zero means an error occurred, see 74libcurl-errors(3). 75