iface_mapper.c File Reference

File containing the implementation of the interface mapper utilities. More...

#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include "allocs.h"
#include "iface_mapper.h"
#include "ifaceu.h"
#include "log.h"
#include "net.h"
#include "os.h"

Include dependency graph for iface_mapper.c:

Functions
int	get_if_mapper (hmap_if_conn *const *hmap, in_addr_t subnet, char ifname[static IF_NAMESIZE])
	Get the interface name corresponding to an IP address of the subnet. More...
bool	put_if_mapper (hmap_if_conn **hmap, in_addr_t subnet, const char *ifname)
	Inserts an interface and subnet IP value into the interface connection mapper. More...
void	free_if_mapper (hmap_if_conn **hmap)
	Frees the interface connection mapper object. More...
int	get_vlan_mapper (hmap_vlan_conn *const *hmap, int vlanid, struct vlan_conn *conn)
	Get the vlan connection structure corresponding to a VLAN ID. More...
int	copy_vlan_mapper (hmap_vlan_conn *const *hmap, hmap_vlan_conn **copy)
	Makes a copy of the VLAn mapper structure. More...
bool	put_vlan_mapper (hmap_vlan_conn **hmap, const struct vlan_conn *conn)
	Inserts a vlan connection structure and VLAN ID value into the interface connection mapper. More...
void	free_vlan_mapper (hmap_vlan_conn **hmap)
	Frees the VLAN ID to interface connection mapper object. More...
int	find_ifinfo (const UT_array *config_ifinfo_array, const char *ip, config_ifinfo_t *ifinfo)
int	get_brname_from_ip (const UT_array *config_ifinfo_array, const char *ip_addr, char brname[static IF_NAMESIZE])
	Get the bridge name from an IP string. More...
int	get_ifname_from_ip (const UT_array *config_ifinfo_array, const char *ip_addr, char ifname[static IF_NAMESIZE])
	Get the interface name from an IP string. More...
bool	create_if_mapper (const UT_array *config_ifinfo_array, hmap_if_conn **hmap)
	Create the subnet to interface mapper. More...
int	create_vlan_mapper (const UT_array *config_ifinfo_array, hmap_vlan_conn **hmap)
	Create the VLAN ID to interface mapper. More...
int	init_ifbridge_names (UT_array *config_ifinfo_array, const char *ifname, const char *brname)
	Initialise the interface names. More...

Detailed Description

File containing the implementation of the interface mapper utilities.

Author

Alexandru Mereacre

Date

2022

Copyright

SPDX-FileCopyrightText: © 2022 NQMCyber Ltd and edgesec contributors SPDX-License-Identifier: LGPL-3.0-or-later

Function Documentation

copy_vlan_mapper()

int copy_vlan_mapper	(	hmap_vlan_conn *const *	hmap,
		hmap_vlan_conn **	copy
	)

Makes a copy of the VLAn mapper structure.

Parameters

[in]	hmap	The VLAN ID to vlan connection mapper object
[in,out]	copy	The copied VLAN mapper.

Returns

int 1 if found, 0 not found, -1 on error

create_if_mapper()

bool create_if_mapper	(	const UT_array *	config_ifinfo_array,
		hmap_if_conn **	hmap
	)

Create the subnet to interface mapper.

Parameters

[in]	config_ifinfo_array	The connection info array
[in,out]	hmap	The subnet to interface mapper

Returns

true on success, false otherwise

create_vlan_mapper()

int create_vlan_mapper	(	const UT_array *	config_ifinfo_array,
		hmap_vlan_conn **	hmap
	)

Create the VLAN ID to interface mapper.

Parameters

[in]	config_ifinfo_array	The connection info array
[in,out]	hmap	The VLAN ID to interface mapper

Returns

0 on success, -1 otherwise

find_ifinfo()

int find_ifinfo	(	const UT_array *	config_ifinfo_array,
		const char *	ip,
		config_ifinfo_t *	ifinfo
	)

free_if_mapper()

void free_if_mapper

(

hmap_if_conn **

hmap

)

Frees the interface connection mapper object.

Parameters

hmap	The interface connection mapper object

free_vlan_mapper()

void free_vlan_mapper

(

hmap_vlan_conn **

hmap

)

Frees the VLAN ID to interface connection mapper object.

Parameters

hmap	The VLAN ID to interface connection mapper object

get_brname_from_ip()

int get_brname_from_ip	(	const UT_array *	config_ifinfo_array,
		const char *	ip_addr,
		char	brname[static IF_NAMESIZE]
	)

Get the bridge name from an IP string.

Parameters

[in]	config_ifinfo_array	The list of IP subnets
[in]	ip_addr	The input IP address
[out]	brname	The returned bridge name (buffer has to be preallocated to at least the size of config_ifinfo_t::brname).

Returns

0 on success, -1 otherwise

get_if_mapper()

int get_if_mapper	(	hmap_if_conn *const *	hmap,
		in_addr_t	subnet,
		char	ifname[static IF_NAMESIZE]
	)

Get the interface name corresponding to an IP address of the subnet.

Parameters

[in]	hmap	The interface connection mapper object
[in]	subnet	The IP address of the subnet
[out]	ifname	The buffer to store the returned interface name. Must be at least IF_NAMESIZE large.

Returns

int 1 if found, 0 not found, -1 on error

get_ifname_from_ip()

int get_ifname_from_ip	(	const UT_array *	config_ifinfo_array,
		const char *	ip,
		char	ifname[static IF_NAMESIZE]
	)

Get the interface name from an IP string.

Parameters

[in]	config_ifinfo_array	The list of IP subnets
[in]	ip	The input IP address
[out]	ifname	The returned interface name (buffer has to be preallocated at least the size of config_ifinfo_t::ifname)

Returns

0 on success, -1 otherwise

get_vlan_mapper()

int get_vlan_mapper	(	hmap_vlan_conn *const *	hmap,
		int	vlanid,
		struct vlan_conn *	conn
	)

Get the vlan connection structure corresponding to a VLAN ID.

Parameters

[in]	hmap	The VLAN ID to vlan connection mapper object
[in]	vlanid	The VLAN ID
[out]	conn	The returned VLAN connection structure

Returns

int 1 if found, 0 not found, -1 on error

init_ifbridge_names()

int init_ifbridge_names	(	UT_array *	config_ifinfo_array,
		const char *	ifname,
		const char *	brname
	)

Initialise the interface names.

Parameters

[in,out]	config_ifinfo_array	The connection info array
[in]	ifname	The interface name prefix
[in]	brname	The bridge name prefix

Returns

0 on success, -1 otherwise

put_if_mapper()

bool put_if_mapper	(	hmap_if_conn **	hmap,
		in_addr_t	subnet,
		const char *	ifname
	)

Inserts an interface and subnet IP value into the interface connection mapper.

Parameters

[in,out]	hmap	The interface connection mapper object
[in]	subnet	The IP address of the subnet
[in]	ifname	The interface name

Returns

true on success, false otherwise

put_vlan_mapper()

bool put_vlan_mapper	(	hmap_vlan_conn **	hmap,
		const struct vlan_conn *	conn
	)

Inserts a vlan connection structure and VLAN ID value into the interface connection mapper.

Parameters

[in,out]	hmap	The VLAN ID to interface connection mapper object
[in]	conn	The VLAN connection structure

Returns

true on success, false otherwise