view cli-channel.c @ 1665:7c17995bcdfb

Improve address logging on early exit messages (#83) Change 'Early exit' and 'Exit before auth' messages to include the IP address & port as part of the message. This allows log scanning utilities such as 'fail2ban' to obtain the offending IP address as part of the failure event instead of extracting the PID from the message and then scanning the log again for match 'child connection from' messages Signed-off-by: Kevin Darbyshire-Bryant <[email protected]>
author Kevin Darbyshire-Bryant <6500011+ldir-EDB0@users.noreply.github.com>
date Wed, 18 Mar 2020 15:28:56 +0000
parents 1c7bf9cec6c8
children
line wrap: on
line source

/*
 * Dropbear SSH
 * 
 * Copyright (c) 2002-2004 Matt Johnston
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE. */

#include "includes.h"
#include "channel.h"
#include "buffer.h"
#include "circbuffer.h"
#include "dbutil.h"
#include "session.h"
#include "ssh.h"

/* We receive channel data - only used by the client chansession code*/
void recv_msg_channel_extended_data() {

	struct Channel *channel;
	unsigned int datatype;

	TRACE(("enter recv_msg_channel_extended_data"))

	channel = getchannel();

	if (channel->type != &clichansess) {
		TRACE(("leave recv_msg_channel_extended_data: chantype is wrong"))
		return; /* we just ignore it */
	}

	datatype = buf_getint(ses.payload);
	
	if (datatype != SSH_EXTENDED_DATA_STDERR) {
		TRACE(("leave recv_msg_channel_extended_data: wrong datatype: %d",
					datatype))
		return;	
	}

	common_recv_msg_channel_data(channel, channel->errfd, channel->extrabuf);

	TRACE(("leave recv_msg_channel_extended_data"))
}