Fix udp sink on Windows

example/example.cpp

@@ -200,7 +200,7 @@ void trace_example()
 // stopwatch example
 #include "spdlog/stopwatch.h"
 #include <thread>
-#include "spdlog/sinks/udp_sink.h"
+
 void stopwatch_example()
 {
     spdlog::stopwatch sw;
@@ -208,11 +208,11 @@ void stopwatch_example()
     spdlog::info("Stopwatch: {} seconds", sw);
 }
 
+// udp sink example
+#include "spdlog/sinks/udp_sink.h"
 void udp_example()
 {
-    // using spdlog::details::make_unique;
+    spdlog::sinks::udp_sink_config cfg("192.168.1.129", 11091);
-    //auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
-    spdlog::sinks::udp_sink_config cfg("127.0.0.1", 11091);
     auto my_logger = spdlog::udp_logger_mt("udplog", cfg);
     my_logger->set_level(spdlog::level::debug);
     my_logger->info("hello world");

include/spdlog/details/udp_client-windows.h

@@ -82,6 +82,15 @@ public:
         addr_.sin_family = AF_INET;
         addr_.sin_port = htons(port);
         InetPton(AF_INET, TEXT(host.c_str()), &addr_.sin_addr.s_addr);
+
+        socket_ = socket(PF_INET, SOCK_DGRAM, 0);
+        if (socket_ == INVALID_SOCKET)
+        {
+            int last_error = ::WSAGetLastError();
+            WSACleanup();
+            throw_winsock_error_("error: Create Socket failed", last_error);
+            return false;
+        }
         return true;
     }
 
@@ -104,7 +113,7 @@ public:
 
     void send(const char *data, size_t n_bytes)
     {
-        if ((sendto(socket_, data, n_bytes, 0, (struct sockaddr *)&addr_, sizeof(struct sockaddr))) == -1)
+        if ((sendto(socket_, data, static_cast<int>(n_bytes), 0, (struct sockaddr *)&addr_, sizeof(struct sockaddr))) == -1)
         {
             throw_spdlog_ex("sendto(2) failed", errno);
             close();

include/spdlog/sinks/udp_sink.h

@@ -7,7 +7,7 @@
 #include <spdlog/sinks/base_sink.h>
 #include <spdlog/details/null_mutex.h>
 #ifdef _WIN32
-#    include <spdlog/details/udp_client_windows.h>
+#    include <spdlog/details/udp_client-windows.h>
 #else
 #    include <spdlog/details/udp_client.h>
 #endif