initial commit

netcon/Intercept.h

@@ -0,0 +1,219 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+
+#ifndef _INTERCEPT_H
+#define _INTERCEPT_H	1
+
+#include <sys/socket.h>
+
+
+/* Userland RPC codes */
+#define RPC_UNDEFINED			 			0
+#define RPC_CONNECT				 			1
+#define RPC_CONNECT_SOCKARG		 	2
+#define RPC_SELECT			 				3
+#define RPC_POLL				 				4
+#define RPC_CLOSE				 				5
+#define RPC_READ				 				6
+#define RPC_WRITE				 				7
+#define RPC_BIND				 				8
+#define RPC_ACCEPT			 				9
+#define RPC_LISTEN			 				10
+#define RPC_SOCKET			 				11
+#define RPC_SHUTDOWN		 				12
+
+/* Administration RPC codes */
+#define RPC_FD_MAP_COMPLETION		20	// Give the service the value we "see" for the new buffer fd
+#define RPC_RETVAL							21	// not RPC per se, but something we should codify
+#define RPC_KILL_INTERCEPT			22  // Tells the service we need to shut down all connections
+
+/* Connection statuses */
+#define UNSTARTED								0
+#define CONNECTING			 				1
+#define CONNECTED				 				2
+#define SENDING					 				3
+#define RECEIVING				 				4
+#define SENTV4REQ				 				5
+#define GOTV4REQ				 				6
+#define SENTV5METHOD			 			7
+#define GOTV5METHOD				 			8
+#define SENTV5AUTH			 				9
+#define GOTV5AUTH				 				10
+#define SENTV5CONNECT			 			11
+#define GOTV5CONNECT			 			12
+#define DONE					 					13
+#define FAILED				 					14
+
+/* Flags to indicate what events a
+   socket was select()ed for */
+#define READ					 					(POLLIN|POLLRDNORM)
+#define WRITE					 					(POLLOUT|POLLWRNORM|POLLWRBAND)
+#define EXCEPT				 					(POLLRDBAND|POLLPRI)
+#define READWRITE				 				(READ|WRITE)
+#define READWRITEEXCEPT			 		(READ|WRITE|EXCEPT)
+
+
+/* for AF_UNIX sockets */
+#define MAX_PATH_NAME_SIZE 64
+
+// bind
+#define BIND_SIG int sockfd, const struct sockaddr *addr, socklen_t addrlen
+struct bind_st
+{
+	int sockfd;
+	struct sockaddr addr;
+	socklen_t addrlen;
+	int __tid;
+};
+
+// connect
+#define CONNECT_SIG int __fd, const struct sockaddr * __addr, socklen_t __len
+struct connect_st
+{
+	int __fd;
+	struct sockaddr __addr;
+	socklen_t __len;
+	int __tid;
+};
+
+// close
+#define CLOSE_SIG int fd
+struct close_st
+{
+	int fd;
+};
+
+// read
+#define DEFAULT_READ_BUFFER_SIZE	1024 * 63
+// read buffer sizes (on test machine) min: 4096    default: 87380   max:6147872
+#define READ_SIG int __fd, void *__buf, size_t __nbytes
+struct read_st
+{
+	int fd;
+	size_t count;
+	unsigned char buf[DEFAULT_READ_BUFFER_SIZE];
+};
+
+#define DEFAULT_WRITE_BUFFER_SIZE	1024 * 63
+// write buffer sizes (on test machine) min: 4096    default: 16384   max:4194304
+#define WRITE_SIG int __fd, const void *__buf, size_t __n
+struct write_st
+{
+	int fd;
+	size_t count;
+	char buf[DEFAULT_WRITE_BUFFER_SIZE];
+};
+
+#define LISTEN_SIG int sockfd, int backlog
+struct listen_st
+{
+	int sockfd;
+	int backlog;
+	int __tid;
+};
+
+#define SOCKET_SIG int socket_family, int socket_type, int protocol
+struct socket_st
+{
+  int socket_family;
+  int socket_type;
+  int protocol;
+	int __tid;
+};
+
+#define ACCEPT4_SIG int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags
+#define ACCEPT_SIG int sockfd, struct sockaddr *addr, socklen_t *addrlen
+struct accept_st
+{
+	int sockfd;
+	struct sockaddr addr;
+	socklen_t addrlen;
+	int __tid;
+};
+
+#define SHUTDOWN_SIG int socket, int how
+struct shutdown_st
+{
+	int socket;
+	int how;
+};
+
+#define CONNECT_SOCKARG struct sockaddr *
+#define SELECT_SIG int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout
+#define POLL_SIG struct pollfd *__fds, nfds_t __nfds, int __timeout
+#define IOCTL_SIG int __fd, unsigned long int __request, ...
+#define FCNTL_SIG int __fd, int __cmd, ...
+#define CLONE_SIG int (*fn) (void *arg), void *child_stack, int flags, void *arg
+#define DAEMON_SIG int nochdir, int noclose
+#define SETSOCKOPT_SIG int socket, int level, int option_name, const void *option_value, socklen_t option_len
+#define GETSOCKOPT_SIG int sockfd, int level, int optname, void *optval, socklen_t *optlen
+
+
+/* LWIP error beautification */
+const char *lwiperror(int n)
+{
+	switch(n)
+	{
+		case 0:
+			return "ERR_OK";
+		case -1:
+			return "ERR_MEM (out of memory)";
+		case -2:
+			return "ERR_BUF (buffer error)";
+		case -3:
+			return "ERR_TIMEOUT (timeout)";
+		case -4:
+			return "ERR_RTE (routing problem)";
+		case -5:
+			return "ERR_INPROGRESS (operation in progress)";
+		case -6:
+			return "ERR_VAL (illegal value)";
+		case -7:
+			return "ERR_WOULDBLOCK (operation would block)";
+		case -8:
+			return "ERR_USE (address in use)";
+		case -9:
+			return "ERR_ISCONN (already connected)";
+		case -10:
+			return "Fatal: ERR_ABRT (connection aborted)";
+		case -11:
+			return "Fatal: ERR_RST (connection reset)";
+		case -12:
+			return "Fatal: ERR_CLSD (connection closed)";
+		case -13:
+			return "Fatal: ERR_CONN (not connected)";
+		case -14:
+			return "Fatal: ERR_ARG (illegal argument)";
+		case -15:
+			return "Fatal: ERR_IF (low level netif error)";
+		default:
+			return "UNKNOWN_RET_VAL";
+	}
+}
+
+#endif