- (djm) Merge OpenBSD changes:

[openssh.git] / channels.h

diff --git a/channels.h b/channels.h
index 9d98d04d08fed843dc036a47ae91a5483b3cd08c..c0d60199c14d7da3bbdf244f28950b7f9c6d75cb 100644 (file)
--- a/channels.h
+++ b/channels.h
@@ -1,4 +1,38 @@
-/* RCSID("$Id$"); */
+/*
+ * 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 1.19 2000/09/07 21:13:37 markus Exp $"); */
 
 #ifndef CHANNELS_H
 #define CHANNELS_H
@@ -21,9 +55,13 @@
  * Data structure for channel data.  This is iniailized in channel_allocate
  * and cleared in channel_free.
  */
+struct Channel;
+typedef struct Channel Channel;
+
 typedef void channel_callback_fn(int id, void *arg);
+typedef int channel_filter_fn(struct Channel *c, char *buf, int len);
 
-typedef struct Channel {
+struct Channel {
        int     type;           /* channel type/state */
        int     self;           /* my own channel identifier */
        int     remote_id;      /* channel identifier for remote peer */
@@ -56,23 +94,36 @@ typedef struct Channel {
 
        char   *ctype;          /* type */
 
-       // callback
+       /* callback */
        channel_callback_fn     *cb_fn;
        void    *cb_arg;
        int     cb_event;
        channel_callback_fn     *dettach_user;
-}       Channel;
+
+       /* filter */
+       channel_filter_fn       *input_filter;
+};
 
 #define CHAN_EXTENDED_IGNORE           0
 #define CHAN_EXTENDED_READ             1
 #define CHAN_EXTENDED_WRITE            2
 
+/* 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_set_fds(int id, int rfd, int wfd, int efd, int extusage);
 void   channel_open(int id);
 void   channel_request(int id, char *service, int wantconfirm);
 void   channel_request_start(int id, char *service, int wantconfirm);
 void   channel_register_callback(int id, int mtype, channel_callback_fn *fn, void *arg);
 void   channel_register_cleanup(int id, channel_callback_fn *fn);
+void   channel_register_filter(int id, channel_filter_fn *fn);
 void   channel_cancel_cleanup(int id);
 Channel        *channel_lookup(int id);
 
@@ -175,7 +226,7 @@ void    channel_permit_all_opens(void);
  * listening for the port, and sends back a success reply (or disconnect
  * message if there was an error).  This never returns if there was an error.
  */
-void    channel_input_port_forward_request(int is_root);
+void    channel_input_port_forward_request(int is_root, int gateway_ports);
 
 /*
  * Creates a port for X11 connections, and starts listening for it. Returns
@@ -207,7 +258,9 @@ void    x11_request_forwarding(void);
  * Requests forwarding for X11 connections, with authentication spoofing.
  * This should be called in the client only.
  */
-void    x11_request_forwarding_with_spoofing(const char *proto, const char *data);
+void
+x11_request_forwarding_with_spoofing(int client_session_id,
+    const char *proto, const char *data);
 
 /* Sends a message to the server to request authentication fd forwarding. */
 void    auth_request_forwarding(void);
@@ -220,15 +273,16 @@ void    auth_request_forwarding(void);
 char   *auth_get_socket_name(void);
 
 /*
- * This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
+ * This is called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
  * This starts forwarding authentication requests.
  */
-void    auth_input_request_forwarding(struct passwd * pw);
+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);
 
 /* XXX */
 int    channel_connect_to(const char *host, u_short host_port);
+int    x11_connect_display(void);
 
 #endif