Kernel: Implement basic recvfrom

libc/include/sys/socket.h

@@ -115,6 +115,16 @@ struct sys_sendto_t
 	socklen_t dest_len;
 };
 
+struct sys_recvfrom_t
+{
+	int socket;
+	void* buffer;
+	size_t length;
+	int flags;
+	struct sockaddr* address;
+	socklen_t* address_len;
+};
+
 int		accept(int socket, struct sockaddr* __restrict address, socklen_t* __restrict address_len);
 int		bind(int socket, const struct sockaddr* address, socklen_t address_len);
 int		connect(int socket, const struct sockaddr* address, socklen_t address_len);

libc/include/sys/syscall.h

@@ -66,6 +66,7 @@ __BEGIN_DECLS
 #define SYS_SOCKET 65
 #define SYS_BIND 66
 #define SYS_SENDTO 67
+#define SYS_RECVFROM 68
 
 __END_DECLS
 

libc/sys/socket.cpp

@@ -7,6 +7,20 @@ int bind(int socket, const struct sockaddr* address, socklen_t address_len)
 	return syscall(SYS_BIND, socket, address, address_len);
 }
 
+ssize_t recvfrom(int socket, void* __restrict buffer, size_t length, int flags, struct sockaddr* __restrict address, socklen_t* __restrict address_len)
+{
+	sys_recvfrom_t arguments {
+		.socket = socket,
+		.buffer = buffer,
+		.length = length,
+		.flags = flags,
+		.address = address,
+		.address_len = address_len
+	};
+	return syscall(SYS_RECVFROM, &arguments);
+}
+
+
 ssize_t sendto(int socket, const void* message, size_t length, int flags, const struct sockaddr* dest_addr, socklen_t dest_len)
 {
 	sys_sendto_t arguments {