| .\" ************************************************************************** |
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| .\" * Project ___| | | | _ \| | |
| .\" * / __| | | | |_) | | |
| .\" * | (__| |_| | _ <| |___ |
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| .\" * |
| .\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. |
| .\" * |
| .\" * This software is licensed as described in the file COPYING, which |
| .\" * you should have received as part of this distribution. The terms |
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| .\" * SPDX-License-Identifier: curl |
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| .\" ************************************************************************** |
| .\" |
| .TH CURLINFO_CONN_ID 3 "07 June 2023" "libcurl" "libcurl" |
| .SH NAME |
| CURLINFO_CONN_ID \- get the ID of the last connection used by the handle |
| .SH SYNOPSIS |
| .nf |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONN_ID, |
| curl_off_t *conn_id); |
| .fi |
| .SH DESCRIPTION |
| Pass a pointer to a \fIcurl_off_t\fP to receive the connection identifier last |
| used by the handle. Stores -1 if there was no connection used. |
| |
| The connection id is unique among all connections using the same |
| connection cache. This is implicitly the case for all connections in the |
| same multi handle. |
| |
| .SH PROTOCOLS |
| All |
| .SH EXAMPLE |
| .nf |
| int main(void) |
| { |
| CURL *curl = curl_easy_init(); |
| if(curl) { |
| CURLcode res; |
| |
| curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); |
| |
| /* Perform the request */ |
| res = curl_easy_perform(curl); |
| |
| if(!res) { |
| curl_off_t conn_id; |
| res = curl_easy_getinfo(curl, CURLINFO_CONN_ID, &conn_id); |
| if(!res) { |
| printf("Connection used: %" CURL_FORMAT_CURL_OFF_T "\\n", conn_id); |
| } |
| } |
| } |
| } |
| .fi |
| .SH AVAILABILITY |
| Added in 8.2.0 |
| .SH RETURN VALUE |
| Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. |
| .SH "SEE ALSO" |
| .BR curl_easy_getinfo (3), |
| .BR curl_easy_setopt (3), |
| .BR CURLINFO_XFER_ID (3) |
