Don't treat unsupported protocols as fatal errors

src/Win32_Interop/Win32_Error.h

@@ -30,6 +30,10 @@ extern "C"
 {
 #endif
 
+#define ESOCKTNOSUPPORT WSAESOCKTNOSUPPORT /* Socket type not supported */
+#define EPFNOSUPPORT    WSAEPFNOSUPPORT    /* Protocol family not supported */
+
+
 /* Converts error codes returned by GetLastError/WSAGetLastError to errno codes */
 int translate_sys_error(int sys_error);
 void set_errno_from_last_error();
@@ -37,6 +41,7 @@ void set_errno_from_last_error();
 int strerror_r(int err, char* buf, size_t buflen);
 char *wsa_strerror(int err);
 
+
 #ifdef __cplusplus
 }
 #endif

src/server.c

@@ -1830,6 +1830,10 @@ int listenToPort(int port, int *fds, int *count) {
                 "Creating Server TCP listening socket %s:%d: %s",
                 server.bindaddr[j] ? server.bindaddr[j] : "*",
                 port, server.neterr);
+			if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT ||
+				errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT ||
+				errno == EAFNOSUPPORT || errno == EADDRNOTAVAIL)
+				continue;
             return C_ERR;
         }
         anetNonBlock(NULL, fds[*count]);