ssh.c File Reference

SSH connection processing functions. More...

#include <libssh/libssh.h>
#include <netinet/in.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/socket.h>
#include <syslog.h>
#include <unistd.h>
#include <libmgec/mge-errno.h>
#include <libmgec/mge-memory.h>
#include <swoc/libswoccommon.h>

Include dependency graph for ssh.c:

Functions
static int	verify_knownhost (void)
static int	direct_forwarding (void)
static void *	relay_data (__attribute__((unused)) void *arg)
static int	authenticate_kbdint (void)
static int	authenticate_password (void)
static int	try_auth_methods_seq (void)
int	open_ssh_tunnel (void)
	Establish SSH connection.
int	close_ssh_tunnel (void)
	Disconnect and close an SSH session.

Variables
static ssh_session	ssh_sess
static ssh_channel	fwd_chan
static int	ssh_sock
static pthread_t	relay_thread
static const int	relay_data_success = 0
static const int	relay_data_failure = -MGE_SSH

Detailed Description

SSH connection processing functions.

Covers tunnel creation and destruction including all authentication. Creates a seperate thread for data relay through the tunnel.

Author

Copyright (C) 2017-2019, 2021-2023, 2025 Mark Grant

Released under the GPLv3 only.
SPDX-License-Identifier: GPL-3.0-only

Version

v1.1.1 ==== 30/03/2025

Function Documentation

authenticate_kbdint()

int authenticate_kbdint ( void )

static

authenticate_password()

int authenticate_password ( void )

static

close_ssh_tunnel()

int close_ssh_tunnel

(

void

)

Disconnect and close an SSH session.

Join data relay thread, free channel and disconnect session. On error mge_errno will be set.

Returns

0 on success, < zero on failure.

direct_forwarding()

int direct_forwarding ( void )

static

open_ssh_tunnel()

int open_ssh_tunnel

(

void

)

Establish SSH connection.

Create session, connect to server, create a tunnel and spawn a thread to relay data through the tunnel. On error mge_errno will be set.

Returns

0 on success, < zero on error.

relay_data()

void * relay_data ( __attribute__((unused)) void * arg )

static

try_auth_methods_seq()

int try_auth_methods_seq ( void )

static

verify_knownhost()

int verify_knownhost ( void )

static

Variable Documentation

fwd_chan

ssh_channel fwd_chan

static

relay_data_failure

const int relay_data_failure = -MGE_SSH

static

relay_data_success

const int relay_data_success = 0

static

relay_thread

pthread_t relay_thread

static

ssh_sess

ssh_session ssh_sess

static

ssh_sock

int ssh_sock

static