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8442c24c9a
The short descriptions describe the data each info retrieves. The info itself does not 'get' the data. This simplifies and shortens the descriptions and make them more consistent. Closes #19406
84 lines
2 KiB
Markdown
84 lines
2 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLINFO_LASTSOCKET
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_ACTIVESOCKET (3)
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- CURLOPT_CONNECT_ONLY (3)
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- curl_easy_getinfo (3)
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- curl_easy_setopt (3)
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Protocol:
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- All
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Added-in: 7.15.2
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---
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# NAME
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CURLINFO_LASTSOCKET - last socket used
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LASTSOCKET, long *socket);
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~~~
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# DESCRIPTION
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Deprecated since 7.45.0. Use CURLINFO_ACTIVESOCKET(3) instead.
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Pass a pointer to a long to receive the last socket used by this curl
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session. If the socket is no longer valid, -1 is returned. When you finish
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working with the socket, you must call curl_easy_cleanup(3) as usual and
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let libcurl close the socket and cleanup other resources associated with the
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handle. This is typically used in combination with
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CURLOPT_CONNECT_ONLY(3).
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NOTE: this API is deprecated since it is not working on win64 where the SOCKET
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type is 64 bits large while its 'long' is 32 bits. Use the
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CURLINFO_ACTIVESOCKET(3) instead, if possible.
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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long sockfd; /* does not work on win64 */
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* Do not do the transfer - only connect to host */
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curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
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res = curl_easy_perform(curl);
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if(res != CURLE_OK) {
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printf("Error: %s\n", curl_easy_strerror(res));
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curl_easy_cleanup(curl);
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return 1;
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}
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/* Extract the socket from the curl handle */
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res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
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if(!res && sockfd != -1) {
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/* operate on sockfd */
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}
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_getinfo(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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