-/* RCSID("$OpenBSD: channels.h,v 1.16 2000/08/19 21:55:51 markus Exp $"); */
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+/*
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+/* RCSID("$OpenBSD: channels.h,v 1.29 2001/04/04 20:25:36 markus Exp $"); */
#ifndef CHANNELS_H
#define CHANNELS_H
+#include "buffer.h"
+
/* Definitions for channel types. */
#define SSH_CHANNEL_FREE 0 /* This channel is free (unused). */
#define SSH_CHANNEL_X11_LISTENER 1 /* Listening for inet X11 conn. */
#define SSH_CHANNEL_INPUT_DRAINING 8 /* sending remaining data to conn */
#define SSH_CHANNEL_OUTPUT_DRAINING 9 /* sending remaining data to app */
#define SSH_CHANNEL_LARVAL 10 /* larval session */
-#define SSH_CHANNEL_MAX_TYPE 11
+#define SSH_CHANNEL_RPORT_LISTENER 11 /* Listening to a R-style port */
+#define SSH_CHANNEL_CONNECTING 12
+#define SSH_CHANNEL_MAX_TYPE 13
/*
* Data structure for channel data. This is iniailized in channel_allocate
int wfd; /* write fd */
int efd; /* extended fd */
int sock; /* sock fd */
+ int isatty; /* rfd is a tty */
Buffer input; /* data read from socket, to be sent over
* encrypted connection */
Buffer output; /* data received over encrypted connection for
#define CHAN_EXTENDED_READ 1
#define CHAN_EXTENDED_WRITE 2
-void channel_set_fds(int id, int rfd, int wfd, int efd, int extusage);
+/* default window/packet sizes for tcp/x11-fwd-channel */
+#define CHAN_SES_WINDOW_DEFAULT (32*1024)
+#define CHAN_SES_PACKET_DEFAULT (CHAN_SES_WINDOW_DEFAULT/2)
+#define CHAN_TCP_WINDOW_DEFAULT (32*1024)
+#define CHAN_TCP_PACKET_DEFAULT (CHAN_TCP_WINDOW_DEFAULT/2)
+#define CHAN_X11_WINDOW_DEFAULT (4*1024)
+#define CHAN_X11_PACKET_DEFAULT (CHAN_X11_WINDOW_DEFAULT/2)
+
+
void channel_open(int id);
void channel_request(int id, char *service, int wantconfirm);
void channel_request_start(int id, char *service, int wantconfirm);
int
channel_new(char *ctype, int type, int rfd, int wfd, int efd,
- int window, int maxpack, int extended_usage, char *remote_name);
-
-void channel_input_channel_request(int type, int plen);
-void channel_input_close(int type, int plen);
-void channel_input_close_confirmation(int type, int plen);
-void channel_input_data(int type, int plen);
-void channel_input_extended_data(int type, int plen);
-void channel_input_ieof(int type, int plen);
-void channel_input_oclose(int type, int plen);
-void channel_input_open_confirmation(int type, int plen);
-void channel_input_open_failure(int type, int plen);
-void channel_input_port_open(int type, int plen);
-void channel_input_window_adjust(int type, int plen);
-void channel_input_open(int type, int plen);
+ int window, int maxpack, int extended_usage, char *remote_name,
+ int nonblock);
+void
+channel_set_fds(int id, int rfd, int wfd, int efd,
+ int extusage, int nonblock);
+
+void deny_input_open(int type, int plen, void *ctxt);
+
+void channel_input_channel_request(int type, int plen, void *ctxt);
+void channel_input_close(int type, int plen, void *ctxt);
+void channel_input_close_confirmation(int type, int plen, void *ctxt);
+void channel_input_data(int type, int plen, void *ctxt);
+void channel_input_extended_data(int type, int plen, void *ctxt);
+void channel_input_ieof(int type, int plen, void *ctxt);
+void channel_input_oclose(int type, int plen, void *ctxt);
+void channel_input_open_confirmation(int type, int plen, void *ctxt);
+void channel_input_open_failure(int type, int plen, void *ctxt);
+void channel_input_port_open(int type, int plen, void *ctxt);
+void channel_input_window_adjust(int type, int plen, void *ctxt);
/* Sets specific protocol options. */
void channel_set_options(int hostname_in_open);
/* Free the channel and close its socket. */
void channel_free(int channel);
-/* Add any bits relevant to channels in select bitmasks. */
-void channel_prepare_select(fd_set * readset, fd_set * writeset);
+/*
+ * Allocate/update select bitmasks and add any bits relevant to channels in
+ * select bitmasks.
+ */
+void
+channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp,
+ int rekeying);
/*
* After select, perform any appropriate operations for channels which have
*/
void channel_close_all(void);
-/* Returns the maximum file descriptor number used by the channels. */
-int channel_max_fd(void);
-
/* Returns true if there is still an open channel over the connection. */
int channel_still_open(void);
/*
* Initiate forwarding of connections to local port "port" through the secure
- * channel to host:port from remote side. This never returns if there was an
- * error.
+ * channel to host:port from remote side.
*/
-void
-channel_request_local_forwarding(u_short port, const char *host,
- u_short remote_port, int gateway_ports);
+int
+channel_request_local_forwarding(u_short listen_port,
+ const char *host_to_connect, u_short port_to_connect, int gateway_ports);
+int
+channel_request_forwarding(const char *listen_address, u_short listen_port,
+ const char *host_to_connect, u_short port_to_connect, int gateway_ports,
+ int remote_fwd);
/*
* Initiate forwarding of connections to port "port" on remote host through
u_short remote_port);
/*
- * Permits opening to any host/port in SSH_MSG_PORT_OPEN. This is usually
- * called by the server, because the user could connect to any port anyway,
- * and the server has no way to know but to trust the client anyway.
+ * Permits opening to any host/port if permitted_opens[] is empty. This is
+ * usually called by the server, because the user could connect to any port
+ * anyway, and the server has no way to know but to trust the client anyway.
*/
void channel_permit_all_opens(void);
+/* Add host/port to list of allowed targets for port forwarding */
+void channel_add_permitted_opens(char *host, int port);
+
+/* Flush list */
+void channel_clear_permitted_opens(void);
+
/*
* This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates
* listening for the port, and sends back a success reply (or disconnect
* the remote channel number. We should do whatever we want, and respond
* with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE.
*/
-void x11_input_open(int type, int plen);
+void x11_input_open(int type, int plen, void *ctxt);
/*
* Requests forwarding of X11 connections. This should be called on the
int auth_input_request_forwarding(struct passwd * pw);
/* This is called to process an SSH_SMSG_AGENT_OPEN message. */
-void auth_input_open_request(int type, int plen);
+void auth_input_open_request(int type, int plen, void *ctxt);
/* XXX */
int channel_connect_to(const char *host, u_short host_port);
+int channel_connect_by_listen_adress(u_short listen_port);
int x11_connect_display(void);
#endif
andersk / openssh.git / blobdiff