X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/dfe666f6c71921aba77808ad97cdc89cf976460c..e5271db2ce7488e56ac65c52ff47b0e218ffd866:/clientloop.c

diff --git a/clientloop.c b/clientloop.c
index f10fab76..5793a6e9 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: clientloop.c,v 1.201 2008/07/16 11:51:14 djm Exp $ */
+/* $OpenBSD: clientloop.c,v 1.216 2010/01/09 05:04:24 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -107,9 +107,9 @@
 #include "atomicio.h"
 #include "sshpty.h"
 #include "misc.h"
-#include "monitor_fdpass.h"
 #include "match.h"
 #include "msg.h"
+#include "roaming.h"
 
 /* import options */
 extern Options options;
@@ -130,6 +130,9 @@ extern int muxserver_sock;
  */
 extern char *host;
 
+/* Force TTY allocation */
+extern int force_tty_flag;
+
 /*
  * Flag to indicate that we have received a window change signal which has
  * not yet been processed.  This will cause a message indicating the new
@@ -161,6 +164,8 @@ static int session_closed = 0;	/* In SSH2: login session closed. */
 static void client_init_dispatch(void);
 int	session_ident = -1;
 
+int	session_resumed = 0;
+
 /* Track escape per proto2 channel */
 struct escape_filter_ctx {
 	int escape_pending;
@@ -492,13 +497,13 @@ client_global_request_reply(int type, u_int32_t seq, void *ctxt)
 		xfree(gc);
 	}
 
-	keep_alive_timeouts = 0;
+	packet_set_alive_timeouts(0);
 }
 
 static void
 server_alive_check(void)
 {
-	if (++keep_alive_timeouts > options.server_alive_count_max) {
+	if (packet_inc_alive_timeouts() > options.server_alive_count_max) {
 		logit("Timeout, server not responding.");
 		cleanup_exit(255);
 	}
@@ -608,7 +613,7 @@ client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
 		atomicio(vwrite, fileno(stderr), buffer_ptr(berr),
 		    buffer_len(berr));
 
-	leave_raw_mode();
+	leave_raw_mode(force_tty_flag);
 
 	/*
 	 * Free (and clear) the buffer to reduce the amount of data that gets
@@ -629,14 +634,14 @@ client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
 	buffer_init(bout);
 	buffer_init(berr);
 
-	enter_raw_mode();
+	enter_raw_mode(force_tty_flag);
 }
 
 static void
 client_process_net_input(fd_set *readset)
 {
-	int len;
-	char buf[8192];
+	int len, cont = 0;
+	char buf[SSH_IOBUFSZ];
 
 	/*
 	 * Read input from the server, and add any such data to the buffer of
@@ -644,8 +649,8 @@ client_process_net_input(fd_set *readset)
 	 */
 	if (FD_ISSET(connection_in, readset)) {
 		/* Read as much as possible. */
-		len = read(connection_in, buf, sizeof(buf));
-		if (len == 0) {
+		len = roaming_read(connection_in, buf, sizeof(buf), &cont);
+		if (len == 0 && cont == 0) {
 			/*
 			 * Received EOF.  The remote host has closed the
 			 * connection.
@@ -765,14 +770,14 @@ process_cmdline(void)
 	void (*handler)(int);
 	char *s, *cmd, *cancel_host;
 	int delete = 0;
-	int local = 0;
-	u_short cancel_port;
+	int local = 0, remote = 0, dynamic = 0;
+	int cancel_port;
 	Forward fwd;
 
 	bzero(&fwd, sizeof(fwd));
 	fwd.listen_host = fwd.connect_host = NULL;
 
-	leave_raw_mode();
+	leave_raw_mode(force_tty_flag);
 	handler = signal(SIGINT, SIG_IGN);
 	cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
 	if (s == NULL)
@@ -790,6 +795,8 @@ process_cmdline(void)
 		    "Request local forward");
 		logit("      -R[bind_address:]port:host:hostport    "
 		    "Request remote forward");
+		logit("      -D[bind_address:]port                  "
+		    "Request dynamic forward");
 		logit("      -KR[bind_address:]port                 "
 		    "Cancel remote forward");
 		if (!options.permit_local_command)
@@ -809,17 +816,22 @@ process_cmdline(void)
 		delete = 1;
 		s++;
 	}
-	if (*s != 'L' && *s != 'R') {
+	if (*s == 'L')
+		local = 1;
+	else if (*s == 'R')
+		remote = 1;
+	else if (*s == 'D')
+		dynamic = 1;
+	else {
 		logit("Invalid command.");
 		goto out;
 	}
-	if (*s == 'L')
-		local = 1;
-	if (local && delete) {
+
+	if ((local || dynamic) && delete) {
 		logit("Not supported.");
 		goto out;
 	}
-	if ((!local || delete) && !compat20) {
+	if (remote && delete && !compat20) {
 		logit("Not supported for SSH protocol version 1.");
 		goto out;
 	}
@@ -837,17 +849,17 @@ process_cmdline(void)
 			cancel_port = a2port(cancel_host);
 			cancel_host = NULL;
 		}
-		if (cancel_port == 0) {
+		if (cancel_port <= 0) {
 			logit("Bad forwarding close port");
 			goto out;
 		}
 		channel_request_rforward_cancel(cancel_host, cancel_port);
 	} else {
-		if (!parse_forward(&fwd, s)) {
+		if (!parse_forward(&fwd, s, dynamic, remote)) {
 			logit("Bad forwarding specification.");
 			goto out;
 		}
-		if (local) {
+		if (local || dynamic) {
 			if (channel_setup_local_fwd_listener(fwd.listen_host,
 			    fwd.listen_port, fwd.connect_host,
 			    fwd.connect_port, options.gateway_ports) < 0) {
@@ -868,7 +880,7 @@ process_cmdline(void)
 
 out:
 	signal(SIGINT, handler);
-	enter_raw_mode();
+	enter_raw_mode(force_tty_flag);
 	if (cmd)
 		xfree(cmd);
 	if (fwd.listen_host != NULL)
@@ -987,7 +999,7 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
 				 * more new connections).
 				 */
 				/* Restore tty modes. */
-				leave_raw_mode();
+				leave_raw_mode(force_tty_flag);
 
 				/* Stop listening for new connections. */
 				channel_stop_listening();
@@ -1036,7 +1048,6 @@ process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr,
 Supported escape sequences:\r\n\
   %c.  - terminate session\r\n\
   %cB  - send a BREAK to the remote system\r\n\
-  %cC  - open a command line\r\n\
   %cR  - Request rekey (SSH protocol 2 only)\r\n\
   %c#  - list forwarded connections\r\n\
   %c?  - this message\r\n\
@@ -1045,8 +1056,7 @@ Supported escape sequences:\r\n\
 					    escape_char, escape_char,
 					    escape_char, escape_char,
 					    escape_char, escape_char,
-					    escape_char, escape_char,
-					    escape_char);
+					    escape_char, escape_char);
 				} else {
 					snprintf(string, sizeof string,
 "%c?\r\n\
@@ -1081,6 +1091,8 @@ Supported escape sequences:\r\n\
 				continue;
 
 			case 'C':
+				if (c && c->ctl_fd != -1)
+					goto noescape;
 				process_cmdline();
 				continue;
 
@@ -1122,7 +1134,7 @@ static void
 client_process_input(fd_set *readset)
 {
 	int len;
-	char buf[8192];
+	char buf[SSH_IOBUFSZ];
 
 	/* Read input from stdin. */
 	if (FD_ISSET(fileno(stdin), readset)) {
@@ -1282,7 +1294,7 @@ client_channel_closed(int id, void *arg)
 {
 	channel_cancel_cleanup(id);
 	session_closed = 1;
-	leave_raw_mode();
+	leave_raw_mode(force_tty_flag);
 }
 
 /*
@@ -1355,7 +1367,7 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
 	signal(SIGWINCH, window_change_handler);
 
 	if (have_pty)
-		enter_raw_mode();
+		enter_raw_mode(force_tty_flag);
 
 	if (compat20) {
 		session_ident = ssh2_chan_id;
@@ -1453,6 +1465,14 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
 			client_process_output(writeset);
 		}
 
+		if (session_resumed) {
+			connection_in = packet_get_connection_in();
+			connection_out = packet_get_connection_out();
+			max_fd = MAX(max_fd, connection_out);
+			max_fd = MAX(max_fd, connection_in);
+			session_resumed = 0;
+		}
+
 		/*
 		 * Send as much buffered packet data as possible to the
 		 * sender.
@@ -1470,10 +1490,18 @@ client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
 	/* Stop watching for window change. */
 	signal(SIGWINCH, SIG_DFL);
 
+	if (compat20) {
+		packet_start(SSH2_MSG_DISCONNECT);
+		packet_put_int(SSH2_DISCONNECT_BY_APPLICATION);
+		packet_put_cstring("disconnected by user");
+		packet_send();
+		packet_write_wait();
+	}
+
 	channel_free_all();
 
 	if (have_pty)
-		leave_raw_mode();
+		leave_raw_mode(force_tty_flag);
 
 	/* restore blocking io */
 	if (!isatty(fileno(stdin)))
@@ -1632,7 +1660,7 @@ client_request_forwarded_tcpip(const char *request_type, int rchan)
 {
 	Channel *c = NULL;
 	char *listen_address, *originator_address;
-	int listen_port, originator_port;
+	u_short listen_port, originator_port;
 
 	/* Get rest of the packet */
 	listen_address = packet_get_string(NULL);
@@ -1658,7 +1686,7 @@ client_request_x11(const char *request_type, int rchan)
 {
 	Channel *c = NULL;
 	char *originator;
-	int originator_port;
+	u_short originator_port;
 	int sock;
 
 	if (!options.forward_x11) {
@@ -1722,7 +1750,7 @@ client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun)
 		return 0;
 
 	if (!compat20) {
-		error("Tunnel forwarding is not support for protocol 1");
+		error("Tunnel forwarding is not supported for protocol 1");
 		return -1;
 	}
 
@@ -1831,22 +1859,24 @@ client_input_channel_req(int type, u_int32_t seq, void *ctxt)
 		chan_rcvd_eow(c);
 	} else if (strcmp(rtype, "exit-status") == 0) {
 		exitval = packet_get_int();
-		if (id == session_ident) {
+		if (c->ctl_fd != -1) {
+			/* Dispatch to mux client */
+			atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
+			success = 1;
+		} else if (id == session_ident) {
+			/* Record exit value of local session */
 			success = 1;
 			exit_status = exitval;
-		} else if (c->ctl_fd == -1) {
+		} else {
 			error("client_input_channel_req: unexpected channel %d",
 			    session_ident);
-		} else {
-			atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
-			success = 1;
 		}
 		packet_check_eom();
 	}
 	if (reply) {
 		packet_start(success ?
 		    SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
-		packet_put_int(id);
+		packet_put_int(c->remote_id);
 		packet_send();
 	}
 	xfree(rtype);
@@ -2035,7 +2065,7 @@ client_init_dispatch(void)
 void
 cleanup_exit(int i)
 {
-	leave_raw_mode();
+	leave_raw_mode(force_tty_flag);
 	leave_non_blocking();
 	if (options.control_path != NULL && muxserver_sock != -1)
 		unlink(options.control_path);