David McCreedy added CURLOPT_SOCKOPTFUNCTION and CURLOPT_SOCKOPTDATA to

allow applications to set their own socket options.

include/curl/curl.h

@@ -133,6 +133,47 @@ extern "C" {
 #undef FILESIZEBITS
 #endif
 
+#if defined(_WIN32) && !defined(WIN32)
+/* Chris Lewis mentioned that he doesn't get WIN32 defined, only _WIN32 so we
+   make this adjustment to catch this. */
+#define WIN32 1
+#endif
+
+#if defined(WIN32) && !defined(_WIN32_WCE) && !defined(__GNUC__) && \
+  !defined(__CYGWIN__) || defined(__MINGW32__)
+#if !(defined(_WINSOCKAPI_) || defined(_WINSOCK_H))
+/* The check above prevents the winsock2 inclusion if winsock.h already was
+   included, since they can't co-exist without problems */
+#include <winsock2.h>
+#endif
+#else
+
+/* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
+   libc5-based Linux systems. Only include it on system that are known to
+   require it! */
+#if defined(_AIX) || defined(NETWARE) || defined(__NetBSD__) || defined(__minix)
+#include <sys/select.h>
+#endif
+
+#ifndef _WIN32_WCE
+#include <sys/socket.h>
+#endif
+#include <sys/time.h>
+#include <sys/types.h>
+#endif
+
+#ifndef curl_socket_typedef
+/* socket typedef */
+#ifdef WIN32
+typedef SOCKET curl_socket_t;
+#define CURL_SOCKET_BAD INVALID_SOCKET
+#else
+typedef int curl_socket_t;
+#define CURL_SOCKET_BAD -1
+#endif
+#define curl_socket_typedef
+#endif /* curl_socket_typedef */
+
 struct curl_httppost {
   struct curl_httppost *next;       /* next entry in the list */
   char *name;                       /* pointer to allocated name */
@@ -184,6 +225,14 @@ typedef size_t (*curl_read_callback)(char *buffer,
                                       size_t nitems,
                                       void *instream);
 
+typedef enum  {
+  CURLSOCKTYPE_IPCXN, /* socket created for a specific IP connection */
+  CURLSOCKTYPE_LAST   /* never use */
+} curlsocktype;
+
+typedef int (*curl_sockopt_callback)(void *clientp,
+                                     curl_socket_t curlfd,
+                                     curlsocktype purpose);
 
 #ifndef CURL_NO_OLDIES
   /* not used since 7.10.8, will be removed in a future release */
@@ -982,6 +1031,10 @@ typedef enum {
   /* Pointer to command string to send if USER/PASS fails. */
   CINIT(FTP_ALTERNATIVE_TO_USER, OBJECTPOINT, 147),
 
+  /* callback function for setting socket options */
+  CINIT(SOCKOPTFUNCTION, FUNCTIONPOINT, 148),
+  CINIT(SOCKOPTDATA, OBJECTPOINT, 149),
+
   CURLOPT_LASTENTRY /* the last unused */
 } CURLoption;
 

include/curl/multi.h

@@ -37,34 +37,6 @@
     file descriptors simultaneous easily.
 
 */
-#if defined(_WIN32) && !defined(WIN32)
-/* Chris Lewis mentioned that he doesn't get WIN32 defined, only _WIN32 so we
-   make this adjustment to catch this. */
-#define WIN32 1
-#endif
-
-#if defined(WIN32) && !defined(_WIN32_WCE) && !defined(__GNUC__) && \
-  !defined(__CYGWIN__) || defined(__MINGW32__)
-#if !(defined(_WINSOCKAPI_) || defined(_WINSOCK_H))
-/* The check above prevents the winsock2 inclusion if winsock.h already was
-   included, since they can't co-exist without problems */
-#include <winsock2.h>
-#endif
-#else
-
-/* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
-   libc5-based Linux systems. Only include it on system that are known to
-   require it! */
-#if defined(_AIX) || defined(NETWARE) || defined(__NetBSD__) || defined(__minix)
-#include <sys/select.h>
-#endif
-
-#ifndef _WIN32_WCE
-#include <sys/socket.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>
-#endif
 
 /*
  * This header file should not really need to include "curl.h" since curl.h
@@ -83,18 +55,6 @@ extern "C" {
 
 typedef void CURLM;
 
-#ifndef curl_socket_typedef
-/* Public socket typedef */
-#ifdef WIN32
-typedef SOCKET curl_socket_t;
-#define CURL_SOCKET_BAD INVALID_SOCKET
-#else
-typedef int curl_socket_t;
-#define CURL_SOCKET_BAD -1
-#endif
-#define curl_socket_typedef
-#endif /* curl_socket_typedef */
-
 typedef enum {
   CURLM_CALL_MULTI_PERFORM = -1, /* please call curl_multi_perform() or
                                     curl_multi_socket*() soon */