added ntop, pton impl for mingw

include/enet.h

@@ -5147,6 +5147,51 @@ extern "C" {
 
     #ifdef _WIN32
 
+    #ifdef __MINGW32__
+    // inet_ntop/inet_pton for MinGW from http://mingw-users.1079350.n2.nabble.com/IPv6-getaddrinfo-amp-inet-ntop-td5891996.html
+    const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt) {
+        if (af == AF_INET) {
+            struct sockaddr_in in;
+            memset(&in, 0, sizeof(in));
+            in.sin_family = AF_INET;
+            memcpy(&in.sin_addr, src, sizeof(struct in_addr));
+            getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in), dst, cnt, NULL, 0, NI_NUMERICHOST);
+            return dst;
+        }
+        else if (af == AF_INET6) {
+            struct sockaddr_in6 in;
+            memset(&in, 0, sizeof(in));
+            in.sin6_family = AF_INET6;
+            memcpy(&in.sin6_addr, src, sizeof(struct in_addr6));
+            getnameinfo((struct sockaddr *)&in, sizeof(struct sockaddr_in6), dst, cnt, NULL, 0, NI_NUMERICHOST);
+            return dst;
+        }
+
+        return NULL;
+    }
+
+    int inet_pton(int af, const char *src, void *dst) {
+        struct addrinfo hints, *res, *ressave;
+
+        memset(&hints, 0, sizeof(struct addrinfo));
+        hints.ai_family = af;
+
+        if (getaddrinfo(src, NULL, &hints, &res) != 0) {
+            return -1;
+        }
+
+        ressave = res;
+
+        while (res) {
+            memcpy(dst, res->ai_addr, res->ai_addrlen);
+            res = res->ai_next;
+        }
+
+        freeaddrinfo(ressave);
+        return 0;
+    }
+    #endif
+
     int enet_initialize(void) {
         WORD versionRequested = MAKEWORD(1, 1);
         WSADATA wsaData;