tun_afunix.c File Reference

#include "syshead.h"
#include "tun.h"
#include "fdmisc.h"
#include "run_command.h"
#include "manage.h"
#include "win32.h"
#include "wfp_block.h"
#include "argv.h"
#include "options.h"
#include "socket.h"
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdlib.h>

Include dependency graph for tun_afunix.c:

Go to the source code of this file.

Functions
static void	tun_afunix_exec_child (const char *dev_node, struct tuntap *tt, struct env_set *env)
void	open_tun_afunix (struct options *o, int mtu, struct tuntap *tt, struct env_set *orig_env)
	Opens an AF_UNIX based tun device.
void	close_tun_afunix (struct tuntap *tt)
	Closes the socket used for the AF_UNIX based device.
ssize_t	write_tun_afunix (struct tuntap *tt, uint8_t *buf, int len)
	Writes a packet to a AF_UNIX based tun device.
ssize_t	read_tun_afunix (struct tuntap *tt, uint8_t *buf, int len)
	Reads a packet from a AF_UNIX based tun device.

Function Documentation

close_tun_afunix()

void close_tun_afunix

(

struct tuntap *

tt

)

Closes the socket used for the AF_UNIX based device.

Also sends a SIGINT to the child process that was spawned to handle the tun device

Definition at line 123 of file tun_afunix.c.

References tuntap::actual_name, tuntap::afunix, ASSERT, and afunix_context::childprocess.

Referenced by do_close_tun_simple().

open_tun_afunix()

void open_tun_afunix	(	struct options *	o,
		int	mtu,
		struct tuntap *	tt,
		struct env_set *	env
	)

Opens an AF_UNIX based tun device.

This also executes the command that the user provided taking care of implementing the actual tun device.

Definition at line 71 of file tun_afunix.c.

References tuntap::actual_name, options::dev, options::dev_node, options::dev_type, dev_type_string(), env_set_create(), env_set_inherit(), gc, gc_free(), gc_new(), options::lladdr, M_ERR, msg, options::route_default_gateway, set_cloexec(), setenv_int(), setenv_str(), socket_set_buffers(), string_alloc(), and tun_afunix_exec_child().

Referenced by open_tun_backend().

read_tun_afunix()

ssize_t read_tun_afunix	(	struct tuntap *	tt,
		uint8_t *	buf,
		int	len
	)

Reads a packet from a AF_UNIX based tun device.

Definition at line 151 of file tun_afunix.c.

References tuntap::afunix, afunix_context::childprocess, M_WARN, msg, openvpn_waitpid_check(), and read.

Referenced by read_incoming_tun().

tun_afunix_exec_child()

static void tun_afunix_exec_child ( const char *  dev_node, struct tuntap *  tt, struct env_set *  env  )

static

Definition at line 51 of file tun_afunix.c.

References tuntap::afunix, argv_free(), argv_new(), argv_printf(), afunix_context::childprocess, M_WARN, openvpn_execve_check(), openvpn_waitpid_check(), and S_NOWAITPID.

Referenced by open_tun_afunix().

write_tun_afunix()

ssize_t write_tun_afunix	(	struct tuntap *	tt,
		uint8_t *	buf,
		int	len
	)

Writes a packet to a AF_UNIX based tun device.

Definition at line 138 of file tun_afunix.c.

References tuntap::afunix, afunix_context::childprocess, M_WARN, msg, openvpn_waitpid_check(), and write.

Referenced by process_outgoing_tun().