Various tweaks to better support Windows.

The socket timeouts did not function properly on Windows.  After some
testing, I've added some changes so that they do work.

While this will be part of the next version of `aprs-weather-submit`,
I've applied them to the v1.8.1 binaries.

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Change Log for `aprs-weather-submit`
 
+## Next version
+- Fixed a bug where v1.8.1 would not handle timeouts correctly using the Win32 API.  The changes are queued for the next version, though I've already included them in the released binaries.
+
 ## Version 1.8.1
 <time datetime="2024-11-03">November 3, 2024</time>
 Fixed a bug where compilation would fail on `armhf` platforms due to an improper cast when `printf()`-ing a `time_t`.  It's a `long long int` on that platform, while `printf()` was expecting a `long int` instead.

src/aprs-is.c

@@ -39,6 +39,7 @@ with this program.  If not, see <https://www.gnu.org/licenses/agpl-3.0.html>.
 #else  /* _WIN32 */
 #include <winsock2.h>   /* all that socket stuff on Windows */
 #include <ws2tcpip.h>   /* inet_pton(), only available on Windows Vista and up */
+#include <stdint.h>     /* intmax_t */
 #endif /* _WIN32 */
 
 /**
@@ -176,11 +177,17 @@ sendPacket (const char* const restrict server,
 		   want to wait forever (like v1.7.2 and older). */
 		if (timeout > 0)
 		{
+#ifndef _WIN32
 			struct timeval socket_timeout;
 			socket_timeout.tv_sec  = timeout;
 			socket_timeout.tv_usec = 0;
 			setsockopt(socket_desc, SOL_SOCKET, SO_SNDTIMEO, &socket_timeout, sizeof(socket_timeout));
 			setsockopt(socket_desc, SOL_SOCKET, SO_RCVTIMEO, &socket_timeout, sizeof(socket_timeout));
+#else
+			DWORD socket_timeout = timeout * 1000;
+			setsockopt(socket_desc, SOL_SOCKET, SO_SNDTIMEO, (const char*)&socket_timeout, sizeof(socket_timeout));
+			setsockopt(socket_desc, SOL_SOCKET, SO_RCVTIMEO, (const char*)&socket_timeout, sizeof(socket_timeout));
+#endif
 		}
 
 		if (connect(socket_desc, addressinfo, (size_t)(result->ai_addrlen)) >= 0)