Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,84 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLINFO_LASTSOCKET
+Section: 3
+Source: libcurl
+See-also:
+  - CURLINFO_ACTIVESOCKET (3)
+  - CURLOPT_CONNECT_ONLY (3)
+  - curl_easy_getinfo (3)
+  - curl_easy_setopt (3)
+Protocol:
+  - All
+Added-in: 7.15.2
+---
+
+# NAME
+
+CURLINFO_LASTSOCKET - get the last socket used
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LASTSOCKET, long *socket);
+~~~
+
+# DESCRIPTION
+
+Deprecated since 7.45.0. Use CURLINFO_ACTIVESOCKET(3) instead.
+
+Pass a pointer to a long to receive the last socket used by this curl
+session. If the socket is no longer valid, -1 is returned. When you finish
+working with the socket, you must call curl_easy_cleanup(3) as usual and
+let libcurl close the socket and cleanup other resources associated with the
+handle. This is typically used in combination with
+CURLOPT_CONNECT_ONLY(3).
+
+NOTE: this API is deprecated since it is not working on win64 where the SOCKET
+type is 64 bits large while its 'long' is 32 bits. Use the
+CURLINFO_ACTIVESOCKET(3) instead, if possible.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    long sockfd; /* does not work on win64 */
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* Do not do the transfer - only connect to host */
+    curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
+    res = curl_easy_perform(curl);
+    if(res != CURLE_OK) {
+      printf("Error: %s\n", curl_easy_strerror(res));
+      curl_easy_cleanup(curl);
+      return 1;
+    }
+
+    /* Extract the socket from the curl handle */
+    res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
+    if(!res && sockfd != -1) {
+      /* operate on sockfd */
+    }
+
+    curl_easy_cleanup(curl);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# 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).