Fix building on linux and freebsd (#67)

Gouster4 · xfangfang · commit 73347065d419 · 2024-11-11T05:58:56.000+08:00
diff --git a/src/gateway.cpp b/src/gateway.cpp
@@ -6,6 +6,7 @@
 #else
 #include <sys/socket.h>
 #include <arpa/inet.h>
+#include <netinet/in.h>
 #endif
 
 #include <IPv4Layer.h>
