Kernel/LibC: Implement getsockname for ipv4 sockets

libc/include/sys/syscall.h

@@ -78,6 +78,7 @@ __BEGIN_DECLS
 	O(SYS_SMO_DELETE,		smo_delete)		\
 	O(SYS_SMO_MAP,			smo_map)		\
 	O(SYS_ISATTY,			isatty)			\
+	O(SYS_GETSOCKNAME,		getsockname)	\
 
 enum Syscall
 {

libc/sys/socket.cpp

@@ -62,3 +62,8 @@ int socket(int domain, int type, int protocol)
 {
 	return syscall(SYS_SOCKET, domain, type, protocol);
 }
+
+int getsockname(int socket, struct sockaddr* __restrict address, socklen_t* __restrict address_len)
+{
+	return syscall(SYS_GETSOCKNAME, socket, address, address_len);
+}