CURLOPT_SERVER_RESPONSE_TIMEOUT_MS: add

Proposed-by: Yifei Kong
Ref: https://curl.se/mail/lib-2023-11/0023.html
Closes curl#12369

docs/libcurl/curl_easy_setopt.3

@@ -423,6 +423,8 @@ Use PRET. See \fICURLOPT_FTP_USE_PRET(3)\fP
 Create missing directories on the remote server. See \fICURLOPT_FTP_CREATE_MISSING_DIRS(3)\fP
 .IP CURLOPT_SERVER_RESPONSE_TIMEOUT
 Timeout for server responses. See \fICURLOPT_SERVER_RESPONSE_TIMEOUT(3)\fP
+.IP CURLOPT_SERVER_RESPONSE_TIMEOUT_MS
+Timeout for server responses. See \fICURLOPT_SERVER_RESPONSE_TIMEOUT_MS(3)\fP
 .IP CURLOPT_FTP_ALTERNATIVE_TO_USER
 Alternative to USER. See \fICURLOPT_FTP_ALTERNATIVE_TO_USER(3)\fP
 .IP CURLOPT_FTP_SKIP_PASV_IP

docs/libcurl/opts/CURLOPT_SERVER_RESPONSE_TIMEOUT_MS.3

@@ -0,0 +1,76 @@
+.\" **************************************************************************
+.\" *                                  _   _ ____  _
+.\" *  Project                     ___| | | |  _ \| |
+.\" *                             / __| | | | |_) | |
+.\" *                            | (__| |_| |  _ <| |___
+.\" *                             \___|\___/|_| \_\_____|
+.\" *
+.\" * 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
+.\" * are also available at https://curl.se/docs/copyright.html.
+.\" *
+.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+.\" * copies of the Software, and permit persons to whom the Software is
+.\" * furnished to do so, under the terms of the COPYING file.
+.\" *
+.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+.\" * KIND, either express or implied.
+.\" *
+.\" * SPDX-License-Identifier: curl
+.\" *
+.\" **************************************************************************
+.\"
+.TH CURLOPT_SERVER_RESPONSE_TIMEOUT_MS 3 "19 Jun 2014" libcurl libcurl
+.SH NAME
+CURLOPT_SERVER_RESPONSE_TIMEOUT_MS \- time allowed to wait for server response
+.SH SYNOPSIS
+.nf
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SERVER_RESPONSE_TIMEOUT_MS,
+                          long timeout);
+.fi
+.SH DESCRIPTION
+Pass a long.  Causes libcurl to set a \fItimeout\fP period (in milliseconds)
+on the amount of time that the server is allowed to take in order to send a
+response message for a command before the session is considered dead.  While
+libcurl is waiting for a response, this value overrides
+\fICURLOPT_TIMEOUT(3)\fP. It is recommended that if used in conjunction with
+\fICURLOPT_TIMEOUT(3)\fP, you set \fICURLOPT_SERVER_RESPONSE_TIMEOUT_MS(3)\fP
+to a value smaller than \fICURLOPT_TIMEOUT(3)\fP.
+
+The maximum accepted value is 2147483648.
+
+This is the millisecond version of \fICURLOPT_SERVER_RESPONSE_TIMEOUT(3)\fP.
+.SH DEFAULT
+None
+.SH PROTOCOLS
+FTP, IMAP, POP3, SMTP, and SSH
+.SH EXAMPLE
+.nf
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    CURLcode res;
+    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/slow.txt");
+    /* wait no more than 237 milliseconds */
+    curl_easy_setopt(curl, CURLOPT_SERVER_RESPONSE_TIMEOUT_MS, 237L);
+    res = curl_easy_perform(curl);
+
+    curl_easy_cleanup(curl);
+  }
+}
+.fi
+.SH AVAILABILITY
+Added in 8.6.0.
+.SH RETURN VALUE
+Returns CURLE_OK if supported, and CURLE_UNKNOWN_OPTION if not. Returns
+CURLE_BAD_FUNCTION_ARGUMENT if set to a negative value or a value that when
+converted to milliseconds is too large.
+.SH "SEE ALSO"
+.BR CURLOPT_CONNECTTIMEOUT (3),
+.BR CURLOPT_LOW_SPEED_LIMIT (3),
+.BR CURLOPT_TIMEOUT (3)

docs/libcurl/opts/Makefile.inc

@@ -332,6 +332,7 @@ man_MANS =                                      \
   CURLOPT_SEEKDATA.3                            \
   CURLOPT_SEEKFUNCTION.3                        \
   CURLOPT_SERVER_RESPONSE_TIMEOUT.3             \
+  CURLOPT_SERVER_RESPONSE_TIMEOUT_MS.3          \
   CURLOPT_SERVICE_NAME.3                        \
   CURLOPT_SHARE.3                               \
   CURLOPT_SOCKOPTDATA.3                         \

docs/libcurl/symbols-in-versions

@@ -801,6 +801,7 @@ CURLOPT_SASL_IR                 7.31.0
 CURLOPT_SEEKDATA                7.18.0
 CURLOPT_SEEKFUNCTION            7.18.0
 CURLOPT_SERVER_RESPONSE_TIMEOUT 7.20.0
+CURLOPT_SERVER_RESPONSE_TIMEOUT_MS 8.6.0
 CURLOPT_SERVICE_NAME            7.43.0
 CURLOPT_SHARE                   7.10
 CURLOPT_SOCKOPTDATA             7.16.0

include/curl/curl.h

@@ -2202,6 +2202,9 @@ typedef enum {
   /* set a specific client IP for HAProxy PROXY protocol header? */
   CURLOPT(CURLOPT_HAPROXY_CLIENT_IP, CURLOPTTYPE_STRINGPOINT, 323),
 
+  /* millisecond version */
+  CURLOPT(CURLOPT_SERVER_RESPONSE_TIMEOUT_MS, CURLOPTTYPE_LONG, 324),
+
   CURLOPT_LASTENTRY /* the last unused */
 } CURLoption;
 

lib/easyoptions.c

@@ -274,6 +274,8 @@ struct curl_easyoption Curl_easyopts[] = {
   {"SEEKFUNCTION", CURLOPT_SEEKFUNCTION, CURLOT_FUNCTION, 0},
   {"SERVER_RESPONSE_TIMEOUT", CURLOPT_SERVER_RESPONSE_TIMEOUT,
    CURLOT_LONG, 0},
+  {"SERVER_RESPONSE_TIMEOUT_MS", CURLOPT_SERVER_RESPONSE_TIMEOUT_MS,
+   CURLOT_LONG, 0},
   {"SERVICE_NAME", CURLOPT_SERVICE_NAME, CURLOT_STRING, 0},
   {"SHARE", CURLOPT_SHARE, CURLOT_OBJECT, 0},
   {"SOCKOPTDATA", CURLOPT_SOCKOPTDATA, CURLOT_CBPTR, 0},
@@ -373,6 +375,6 @@ struct curl_easyoption Curl_easyopts[] = {
  */
 int Curl_easyopts_check(void)
 {
-  return ((CURLOPT_LASTENTRY%10000) != (323 + 1));
+  return ((CURLOPT_LASTENTRY%10000) != (324 + 1));
 }
 #endif

lib/setopt.c

@@ -366,6 +366,17 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
     else
       return CURLE_BAD_FUNCTION_ARGUMENT;
     break;
+  case CURLOPT_SERVER_RESPONSE_TIMEOUT_MS:
+    /*
+     * Option that specifies how quickly a server response must be obtained
+     * before it is considered failure. For pingpong protocols.
+     */
+    arg = va_arg(param, long);
+    if((arg >= 0) && (arg <= INT_MAX))
+      data->set.server_response_timeout = (unsigned int)arg;
+    else
+      return CURLE_BAD_FUNCTION_ARGUMENT;
+    break;
 #ifndef CURL_DISABLE_TFTP
   case CURLOPT_TFTP_NO_OPTIONS:
     /*