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 +1,77 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_TCP_KEEPALIVE
+Section: 3
+Source: libcurl
+See-also:
+  - CURLOPT_LOW_SPEED_LIMIT (3)
+  - CURLOPT_MAX_RECV_SPEED_LARGE (3)
+  - CURLOPT_TCP_KEEPIDLE (3)
+  - CURLOPT_TCP_KEEPINTVL (3)
+  - CURLOPT_TCP_KEEPCNT (3)
+Protocol:
+  - TCP
+Added-in: 7.25.0
+---
+
+# NAME
+
+CURLOPT_TCP_KEEPALIVE - TCP keep-alive probing
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_KEEPALIVE, long probe);
+~~~
+
+# DESCRIPTION
+
+Pass a long. If set to 1, TCP keepalive probes are used. The delay and
+frequency of these probes can be controlled by the
+CURLOPT_TCP_KEEPIDLE(3), CURLOPT_TCP_KEEPINTVL(3), and CURLOPT_TCP_KEEPCNT(3)
+options, provided the operating system supports them. Set to 0 (default behavior)
+to disable keepalive probes.
+
+# DEFAULT
+
+0
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* enable TCP keep-alive for this transfer */
+    curl_easy_setopt(curl, CURLOPT_TCP_KEEPALIVE, 1L);
+
+    /* keep-alive idle time to 120 seconds */
+    curl_easy_setopt(curl, CURLOPT_TCP_KEEPIDLE, 120L);
+
+    /* interval time between keep-alive probes: 60 seconds */
+    curl_easy_setopt(curl, CURLOPT_TCP_KEEPINTVL, 60L);
+
+    /* maximum number of keep-alive probes: 3 */
+    curl_easy_setopt(curl, CURLOPT_TCP_KEEPCNT, 3L);
+
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+curl_easy_setopt(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).