1CURLINFO_LASTSOCKET(3) curl_easy_getinfo options CURLINFO_LASTSOCKET(3)
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6 CURLINFO_LASTSOCKET - get the last socket used
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9 #include <curl/curl.h>
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11 CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LASTSOCKET, long *socket);
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14 Deprecated since 7.45.0. Use CURLINFO_ACTIVESOCKET(3) instead.
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16 Pass a pointer to a long to receive the last socket used by this curl
17 session. If the socket is no longer valid, -1 is returned. When you
18 finish working with the socket, you must call curl_easy_cleanup() as
19 usual and let libcurl close the socket and cleanup other resources as‐
20 sociated with the handle. This is typically used in combination with
21 CURLOPT_CONNECT_ONLY(3).
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23 NOTE: this API is deprecated since it is not working on win64 where the
24 SOCKET type is 64 bits large while its 'long' is 32 bits. Use the
25 CURLINFO_ACTIVESOCKET(3) instead, if possible.
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28 All
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31 CURL *curl = curl_easy_init();
32 if(curl) {
33 long sockfd; /* does not work on win64! */
34 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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36 /* Do not do the transfer - only connect to host */
37 curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
38 res = curl_easy_perform(curl);
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40 /* Extract the socket from the curl handle */
41 res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
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43 if(res != CURLE_OK) {
44 printf("Error: %s\n", curl_easy_strerror(res));
45 return 1;
46 }
47 }
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50 Added in 7.15.2
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53 Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
54 if not.
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57 curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_ACTIVESOCKET(3),
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61libcurl 7.85.0 May 17, 2022 CURLINFO_LASTSOCKET(3)