3ds: Add missing defines and files for network

Makefile.common

@@ -120,7 +120,11 @@ SOURCES_C += $(CORE_DIR)/common/net_dgrm.c \
 	$(CORE_DIR)/common/net_udp.c \
 	$(CORE_DIR)/common/net_bsd.c
 
-ifneq ($(STATIC_LINKING),1)
+ifeq ($(platform), ctr)
+SOURCES_C += \
+				 $(LIBRETRO_COMM_DIR)/net/net_compat.c \
+				 $(LIBRETRO_COMM_DIR)/net/net_socket.c
+else ifneq ($(STATIC_LINKING),1)
 SOURCES_C += \
 				 $(LIBRETRO_COMM_DIR)/net/net_compat.c \
 				 $(LIBRETRO_COMM_DIR)/net/net_socket.c

common/net_udp.c

@@ -54,6 +54,10 @@ struct in_addr {
 #define SO_BROADCAST SCE_NET_SO_BROADCAST
 #endif
 
+#ifdef _3DS
+#define SO_BROADCAST 0x20
+#endif
+
 #ifndef INADDR_NONE
 #define INADDR_NONE    ((uint32_t) 0xffffffff)  /* 255.255.255.255 */
 #endif