route.h File Reference

#include "basic.h"
#include "tun.h"
#include "misc.h"
#include "networking.h"

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Data Structures
struct	route_bypass
struct	route_special_addr
struct	route_option
struct	route_option_list
struct	route_ipv6_option
struct	route_ipv6_option_list
struct	route_ipv4
struct	route_ipv6
struct	route_gateway_address
struct	route_gateway_info
struct	route_ipv6_gateway_address
struct	route_ipv6_gateway_info
struct	route_list
struct	route_ipv6_list
struct	iroute
struct	iroute_ipv6

Macros
#define	ROUTE_METHOD_ADAPTIVE   0 /* try IP helper first then route.exe */
#define	ROUTE_METHOD_IPAPI   1 /* use IP helper API */
#define	ROUTE_METHOD_EXE   2 /* use route.exe */
#define	ROUTE_METHOD_SERVICE   3 /* use the privileged Windows service */
#define	ROUTE_METHOD_MASK   3
#define	ROUTE_DELETE_FIRST   (1 << 2)
#define	ROUTE_REF_GW   (1 << 3)
#define	N_ROUTE_BYPASS   8
#define	RTSA_REMOTE_ENDPOINT   (1 << 0)
#define	RTSA_REMOTE_HOST   (1 << 1)
#define	RTSA_DEFAULT_METRIC   (1 << 2)
#define	RG_ENABLE   (1u << 0)
#define	RG_LOCAL   (1u << 1)
#define	RG_DEF1   (1u << 2)
#define	RG_BYPASS_DHCP   (1u << 3)
#define	RG_BYPASS_DNS   (1u << 4)
#define	RG_REROUTE_GW   (1u << 5)
#define	RG_AUTO_LOCAL   (1u << 6)
#define	RG_BLOCK_LOCAL   (1u << 7)
#define	RT_DEFINED   (1u << 0)
#define	RT_ADDED   (1u << 1)
#define	RT_METRIC_DEFINED   (1u << 2)
#define	RGI_ADDR_DEFINED   (1 << 0) /* set if gateway.addr defined */
#define	RGI_NETMASK_DEFINED   (1 << 1) /* set if gateway.netmask defined */
#define	RGI_HWADDR_DEFINED   (1 << 2) /* set if hwaddr is defined */
#define	RGI_IFACE_DEFINED   (1 << 3) /* set if iface is defined */
#define	RGI_OVERFLOW   (1 << 4) /* set if more interface addresses than will fit in addrs */
#define	RGI_ON_LINK   (1 << 5)
#define	RGI_N_ADDRESSES   8
#define	RGI_N_ADDRESSES   8
#define	RL_DID_REDIRECT_DEFAULT_GATEWAY   (1u << 0)
#define	RL_DID_LOCAL   (1u << 1)
#define	RL_ROUTES_ADDED   (1u << 2)
#define	TLA_NOT_IMPLEMENTED   0
#define	TLA_NONLOCAL   1
#define	TLA_LOCAL   2

Functions
bool	block_local_needed (const struct route_list *rl)
	Get the decision whether to block traffic to local networks while the VPN is connected.
struct route_option_list *	new_route_option_list (struct gc_arena *a)
struct route_ipv6_option_list *	new_route_ipv6_option_list (struct gc_arena *a)
struct route_option_list *	clone_route_option_list (const struct route_option_list *src, struct gc_arena *a)
struct route_ipv6_option_list *	clone_route_ipv6_option_list (const struct route_ipv6_option_list *src, struct gc_arena *a)
void	copy_route_option_list (struct route_option_list *dest, const struct route_option_list *src, struct gc_arena *a)
void	copy_route_ipv6_option_list (struct route_ipv6_option_list *dest, const struct route_ipv6_option_list *src, struct gc_arena *a)
void	route_ipv6_clear_host_bits (struct route_ipv6 *r6)
bool	add_route_ipv6 (struct route_ipv6 *r, const struct tuntap *tt, unsigned int flags, const struct env_set *es, openvpn_net_ctx_t *ctx)
void	delete_route_ipv6 (const struct route_ipv6 *r, const struct tuntap *tt, const struct env_set *es, openvpn_net_ctx_t *ctx)
bool	add_route (struct route_ipv4 *r, const struct tuntap *tt, unsigned int flags, const struct route_gateway_info *rgi, const struct env_set *es, openvpn_net_ctx_t *ctx)
void	add_route_to_option_list (struct route_option_list *l, const char *network, const char *netmask, const char *gateway, const char *metric, int table_id)
void	add_route_ipv6_to_option_list (struct route_ipv6_option_list *l, const char *prefix, const char *gateway, const char *metric, int table_id)
bool	init_route_list (struct route_list *rl, const struct route_option_list *opt, const char *remote_endpoint, int default_metric, in_addr_t remote_host, struct env_set *es, openvpn_net_ctx_t *ctx)
bool	init_route_ipv6_list (struct route_ipv6_list *rl6, const struct route_ipv6_option_list *opt6, const char *remote_endpoint, int default_metric, const struct in6_addr *remote_host, struct env_set *es, openvpn_net_ctx_t *ctx)
void	route_list_add_vpn_gateway (struct route_list *rl, struct env_set *es, const in_addr_t addr)
bool	add_routes (struct route_list *rl, struct route_ipv6_list *rl6, const struct tuntap *tt, unsigned int flags, const struct env_set *es, openvpn_net_ctx_t *ctx)
void	delete_routes (struct route_list *rl, struct route_ipv6_list *rl6, const struct tuntap *tt, unsigned int flags, const struct env_set *es, openvpn_net_ctx_t *ctx)
void	delete_routes_v4 (struct route_list *rl, const struct tuntap *tt, unsigned int flags, const struct env_set *es, openvpn_net_ctx_t *ctx)
void	delete_routes_v6 (struct route_ipv6_list *rl6, const struct tuntap *tt, unsigned int flags, const struct env_set *es, openvpn_net_ctx_t *ctx)
void	setenv_routes (struct env_set *es, const struct route_list *rl)
void	setenv_routes_ipv6 (struct env_set *es, const struct route_ipv6_list *rl6)
bool	is_special_addr (const char *addr_str)
void	get_default_gateway (struct route_gateway_info *rgi, in_addr_t dest, openvpn_net_ctx_t *ctx)
	Retrieves the best gateway for a given destination based on the routing table.
void	get_default_gateway_ipv6 (struct route_ipv6_gateway_info *rgi, const struct in6_addr *dest, openvpn_net_ctx_t *ctx)
void	print_default_gateway (const msglvl_t msglevel, const struct route_gateway_info *rgi, const struct route_ipv6_gateway_info *rgi6)
int	test_local_addr (const in_addr_t addr, const struct route_gateway_info *rgi)
void	print_route_options (const struct route_option_list *rol, msglvl_t msglevel)
void	show_routes (msglvl_t msglevel)
bool	test_routes (const struct route_list *rl, const struct tuntap *tt)
bool	netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits)
int	netmask_to_netbits2 (in_addr_t netmask)
static in_addr_t	netbits_to_netmask (const int netbits)
static int	route_did_redirect_default_gateway (const struct route_list *rl)
bool	ipv6_net_contains_host (const struct in6_addr *network, unsigned int bits, const struct in6_addr *host)
	check whether an IPv6 host address is covered by a given network/bits

Macro Definition Documentation

N_ROUTE_BYPASS

#define N_ROUTE_BYPASS   8

Definition at line 54 of file route.h.

Referenced by add_bypass_address().

RG_AUTO_LOCAL

#define RG_AUTO_LOCAL   (1u << 6)

Definition at line 92 of file route.h.

Referenced by add_option(), and redirect_default_route_to_vpn().

RG_BLOCK_LOCAL

#define RG_BLOCK_LOCAL   (1u << 7)

Definition at line 93 of file route.h.

Referenced by add_option(), and block_local_needed().

RG_BYPASS_DHCP

#define RG_BYPASS_DHCP   (1u << 3)

Definition at line 89 of file route.h.

Referenced by add_option(), and get_bypass_addresses().

RG_BYPASS_DNS

#define RG_BYPASS_DNS   (1u << 4)

Definition at line 90 of file route.h.

Referenced by add_option(), and get_bypass_addresses().

RG_DEF1

#define RG_DEF1   (1u << 2)

Definition at line 88 of file route.h.

Referenced by add_option(), redirect_default_route_to_vpn(), remap_redirect_gateway_flags(), and undo_redirect_default_route_to_vpn().

RG_ENABLE

#define RG_ENABLE   (1u << 0)

Definition at line 86 of file route.h.

Referenced by add_option(), init_route_list(), options_postprocess_verify_ce(), print_route_options(), redirect_default_route_to_vpn(), and test_routes().

RG_LOCAL

#define RG_LOCAL   (1u << 1)

Definition at line 87 of file route.h.

Referenced by add_option(), print_route_options(), and redirect_default_route_to_vpn().

RG_REROUTE_GW

#define RG_REROUTE_GW   (1u << 5)

Definition at line 91 of file route.h.

Referenced by add_option(), do_init_route_ipv6_list(), redirect_default_route_to_vpn(), remap_redirect_gateway_flags(), and undo_redirect_default_route_to_vpn().

RGI_ADDR_DEFINED

#define RGI_ADDR_DEFINED   (1 << 0) /* set if gateway.addr defined */

Definition at line 159 of file route.h.

Referenced by block_local_needed(), get_default_gateway(), get_default_gateway_ipv6(), get_special_addr(), init_route_ipv6_list(), init_route_list(), local_route(), print_default_gateway(), redirect_default_route_to_vpn(), undo_redirect_default_route_to_vpn(), and warn_on_use_of_common_subnets().

RGI_HWADDR_DEFINED

#define RGI_HWADDR_DEFINED   (1 << 2) /* set if hwaddr is defined */

Definition at line 161 of file route.h.

Referenced by get_default_gateway(), print_default_gateway(), and push_peer_info().

RGI_IFACE_DEFINED

#define RGI_IFACE_DEFINED   (1 << 3) /* set if iface is defined */

Definition at line 162 of file route.h.

Referenced by get_default_gateway(), get_default_gateway_ipv6(), init_route_ipv6_list(), local_route(), and print_default_gateway().

RGI_N_ADDRESSES [1/2]

#define RGI_N_ADDRESSES   8

Definition at line 183 of file route.h.

RGI_N_ADDRESSES [2/2]

#define RGI_N_ADDRESSES   8

Definition at line 183 of file route.h.

RGI_NETMASK_DEFINED

#define RGI_NETMASK_DEFINED   (1 << 1) /* set if gateway.netmask defined */

Definition at line 160 of file route.h.

Referenced by block_local_needed(), get_default_gateway(), local_route(), print_default_gateway(), and warn_on_use_of_common_subnets().

RGI_ON_LINK

#define RGI_ON_LINK   (1 << 5)

Definition at line 164 of file route.h.

Referenced by get_default_gateway(), get_default_gateway_ipv6(), init_route_ipv6_list(), is_on_link(), and print_default_gateway().

RGI_OVERFLOW

#define RGI_OVERFLOW   (1 << 4) /* set if more interface addresses than will fit in addrs */

Definition at line 163 of file route.h.

RL_DID_LOCAL

#define RL_DID_LOCAL   (1u << 1)

Definition at line 231 of file route.h.

Referenced by redirect_default_route_to_vpn(), and undo_redirect_default_route_to_vpn().

RL_DID_REDIRECT_DEFAULT_GATEWAY

#define RL_DID_REDIRECT_DEFAULT_GATEWAY   (1u << 0)

Definition at line 230 of file route.h.

Referenced by redirect_default_route_to_vpn(), route_did_redirect_default_gateway(), and undo_redirect_default_route_to_vpn().

RL_ROUTES_ADDED

#define RL_ROUTES_ADDED   (1u << 2)

Definition at line 232 of file route.h.

Referenced by add_routes(), delete_routes_v4(), and delete_routes_v6().

ROUTE_DELETE_FIRST

#define ROUTE_DELETE_FIRST   (1 << 2)

Definition at line 49 of file route.h.

Referenced by add_routes().

ROUTE_METHOD_ADAPTIVE

#define ROUTE_METHOD_ADAPTIVE   0 /* try IP helper first then route.exe */

Definition at line 39 of file route.h.

Referenced by add_option(), add_route(), delete_route(), and init_options().

ROUTE_METHOD_EXE

#define ROUTE_METHOD_EXE   2 /* use route.exe */

Definition at line 41 of file route.h.

Referenced by add_option(), add_route(), and delete_route().

ROUTE_METHOD_IPAPI

#define ROUTE_METHOD_IPAPI   1 /* use IP helper API */

Definition at line 40 of file route.h.

Referenced by add_option(), add_route(), and delete_route().

ROUTE_METHOD_MASK

#define ROUTE_METHOD_MASK   3

Definition at line 43 of file route.h.

Referenced by add_route(), and delete_route().

ROUTE_METHOD_SERVICE

#define ROUTE_METHOD_SERVICE   3 /* use the privileged Windows service */

Definition at line 42 of file route.h.

Referenced by add_option(), add_route(), delete_route(), and remap_redirect_gateway_flags().

ROUTE_REF_GW

#define ROUTE_REF_GW   (1 << 3)

Definition at line 50 of file route.h.

Referenced by add_bypass_routes(), del_bypass_routes(), is_on_link(), redirect_default_route_to_vpn(), and undo_redirect_default_route_to_vpn().

RT_ADDED

#define RT_ADDED   (1u << 1)

Definition at line 121 of file route.h.

Referenced by add_route(), add_route_ipv6(), del_route3(), delete_route(), delete_route_connected_v6_net(), and delete_route_ipv6().

RT_DEFINED

#define RT_DEFINED   (1u << 0)

Definition at line 120 of file route.h.

Referenced by add_block_local_item(), add_route(), add_route3(), add_route_connected_v6_net(), add_route_ipv6(), del_route3(), delete_route(), delete_route_connected_v6_net(), delete_route_ipv6(), do_ifconfig_ipv4(), init_route(), init_route_ipv6(), init_route_ipv6_list(), setenv_route(), and setenv_route_ipv6().

RT_METRIC_DEFINED

#define RT_METRIC_DEFINED   (1u << 2)

Definition at line 122 of file route.h.

Referenced by add_route(), add_route_connected_v6_net(), add_route_ipapi(), add_route_ipv6(), delete_route(), delete_route_connected_v6_net(), delete_route_ipv6(), do_ifconfig_ipv4(), do_route_ipv4_service(), do_route_ipv6_service(), init_route(), init_route_ipv6(), init_route_ipv6_list(), route_ipv6_ipapi(), setenv_route(), and setenv_route_ipv6().

RTSA_DEFAULT_METRIC

#define RTSA_DEFAULT_METRIC   (1 << 2)

Definition at line 64 of file route.h.

Referenced by init_route(), init_route_ipv6(), init_route_ipv6_list(), and init_route_list().

RTSA_REMOTE_ENDPOINT

#define RTSA_REMOTE_ENDPOINT   (1 << 0)

Definition at line 62 of file route.h.

Referenced by block_local_needed(), get_special_addr(), init_route(), init_route_ipv6(), init_route_ipv6_list(), init_route_list(), redirect_default_route_to_vpn(), route_list_add_vpn_gateway(), and test_routes().

RTSA_REMOTE_HOST

#define RTSA_REMOTE_HOST   (1 << 1)

Definition at line 63 of file route.h.

Referenced by get_special_addr(), init_route_ipv6_list(), init_route_list(), and redirect_default_route_to_vpn().

TLA_LOCAL

#define TLA_LOCAL   2

Definition at line 372 of file route.h.

Referenced by block_local_needed(), redirect_default_route_to_vpn(), and test_local_addr().

TLA_NONLOCAL

#define TLA_NONLOCAL   1

Definition at line 371 of file route.h.

Referenced by add_host_route_if_nonlocal(), redirect_default_route_to_vpn(), and test_local_addr().

TLA_NOT_IMPLEMENTED

#define TLA_NOT_IMPLEMENTED   0

Definition at line 370 of file route.h.

Function Documentation

add_route()

bool add_route	(	struct route_ipv4 *	r,
		const struct tuntap *	tt,
		unsigned int	flags,
		const struct route_gateway_info *	rgi,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 1450 of file route.c.

References route_gateway_info::adapter_index, add_route_ipapi(), add_route_service(), argv_free(), argv_msg(), argv_new(), argv_printf(), argv_printf_cat(), ASSERT, D_ROUTE, route_ipv4::flags, route_ipv4::gateway, gc, gc_free(), gc_new(), get_win_sys_path(), iface, is_on_link(), local_route(), LR_ERROR, M_FATAL, M_WARN, route_ipv4::metric, msg, net_ctx_reset(), netcmd_semaphore_lock(), netcmd_semaphore_release(), route_ipv4::netmask, netmask_to_netbits2(), route_ipv4::network, openvpn_execve_check(), print_in_addr_t(), ROUTE_METHOD_ADAPTIVE, ROUTE_METHOD_EXE, ROUTE_METHOD_IPAPI, ROUTE_METHOD_MASK, ROUTE_METHOD_SERVICE, RT_ADDED, RT_DEFINED, RT_METRIC_DEFINED, RTA_EEXIST, RTA_ERROR, RTA_SUCCESS, status, route_ipv4::table_id, TUN_ADAPTER_INDEX_INVALID, and WIN_ROUTE_PATH_SUFFIX.

Referenced by add_route3(), add_routes(), and do_ifconfig_ipv4().

add_route_ipv6()

bool add_route_ipv6	(	struct route_ipv6 *	r,
		const struct tuntap *	tt,
		unsigned int	flags,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 1759 of file route.c.

References tuntap::actual_name, tuntap::adapter_index, add_route_ipv6_service(), argv_free(), argv_msg(), argv_new(), argv_printf(), argv_printf_cat(), D_ROUTE, DEV_TYPE_TAP, DEV_TYPE_TUN, gc, gc_free(), gc_malloc(), gc_new(), M_FATAL, M_WARN, msg, tuntap_options::msg_channel, net_ctx_reset(), openvpn_execve_check(), tuntap::options, print_in6_addr(), r6, route_ipv6_clear_host_bits(), route_ipv6_ipapi(), RT_ADDED, RT_DEFINED, RT_METRIC_DEFINED, RTA_EEXIST, RTA_ERROR, RTA_SUCCESS, status, and tuntap::type.

Referenced by add_route_connected_v6_net(), and add_routes().

add_route_ipv6_to_option_list()

void add_route_ipv6_to_option_list	(	struct route_ipv6_option_list *	l,
		const char *	prefix,
		const char *	gateway,
		const char *	metric,
		int	table_id )

Definition at line 497 of file route.c.

References ALLOC_OBJ_GC, route_ipv6_option::gateway, route_ipv6_option_list::gc, route_ipv6_option::metric, route_ipv6_option::next, route_ipv6_option::prefix, route_ipv6_option_list::routes_ipv6, and route_ipv6_option::table_id.

Referenced by add_option(), and do_init_route_ipv6_list().

add_route_to_option_list()

void add_route_to_option_list	(	struct route_option_list *	l,
		const char *	network,
		const char *	netmask,
		const char *	gateway,
		const char *	metric,
		int	table_id )

Definition at line 482 of file route.c.

References ALLOC_OBJ_GC, route_option::gateway, route_option_list::gc, route_option::metric, route_option::netmask, route_option::network, route_option::next, route_option_list::routes, and route_option::table_id.

Referenced by add_option(), and helper_add_route().

add_routes()

bool add_routes	(	struct route_list *	rl,
		struct route_ipv6_list *	rl6,
		const struct tuntap *	tt,
		unsigned int	flags,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 1093 of file route.c.

References tuntap::actual_name, add_route(), add_route_ipv6(), delete_route(), delete_route_ipv6(), tuntap::did_ifconfig_ipv6_setup, tuntap::did_ifconfig_setup, route_ipv4::flags, route_ipv6::flags, route_ipv6_list::iflags, route_list::iflags, M_INFO, management_set_state(), msg, route_ipv4::next, route_ipv6::next, OPENVPN_STATE_ADD_ROUTES, redirect_default_route_to_vpn(), route_list::rgi, RL_ROUTES_ADDED, ROUTE_DELETE_FIRST, route_list::routes, and route_ipv6_list::routes_ipv6.

Referenced by do_route().

block_local_needed()

bool block_local_needed

(

const struct route_list *

rl

)

Get the decision whether to block traffic to local networks while the VPN is connected.

This definitely returns false when not redirecting the gateway or when the 'block-local' flag is not set. Also checks for other prerequisites to redirect local networks into the tunnel.

Parameters

rl	const pointer to the struct route_list to base the decision on.

Returns

boolean indicating whether local traffic should be blocked.

Definition at line 586 of file route.c.

References route_gateway_info::flags, route_list::flags, route_special_addr::flags, route_special_addr::remote_host_local, RG_BLOCK_LOCAL, route_list::rgi, RGI_ADDR_DEFINED, RGI_NETMASK_DEFINED, RTSA_REMOTE_ENDPOINT, route_list::spec, and TLA_LOCAL.

Referenced by add_wfp_block(), del_wfp_block(), and init_route_list().

clone_route_ipv6_option_list()

struct route_ipv6_option_list * clone_route_ipv6_option_list	(	const struct route_ipv6_option_list *	src,
		struct gc_arena *	a )

Definition at line 165 of file route.c.

References ALLOC_OBJ_GC.

Referenced by pre_connect_save().

clone_route_option_list()

struct route_option_list * clone_route_option_list	(	const struct route_option_list *	src,
		struct gc_arena *	a )

Definition at line 156 of file route.c.

References ALLOC_OBJ_GC.

Referenced by pre_connect_save().

copy_route_ipv6_option_list()

void copy_route_ipv6_option_list	(	struct route_ipv6_option_list *	dest,
		const struct route_ipv6_option_list *	src,
		struct gc_arena *	a )

Definition at line 182 of file route.c.

References route_ipv6_option_list::gc.

Referenced by pre_connect_restore().

copy_route_option_list()

void copy_route_option_list	(	struct route_option_list *	dest,
		const struct route_option_list *	src,
		struct gc_arena *	a )

Definition at line 174 of file route.c.

References route_option_list::gc.

Referenced by pre_connect_restore().

delete_route_ipv6()

void delete_route_ipv6	(	const struct route_ipv6 *	r,
		const struct tuntap *	tt,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 2167 of file route.c.

References tuntap::actual_name, argv_free(), argv_msg(), argv_new(), argv_printf(), argv_printf_cat(), D_ROUTE, D_ROUTE_DEBUG, del_route_ipv6_service(), DEV_TYPE_TAP, gc, gc_free(), gc_malloc(), gc_new(), M_FATAL, M_WARN, msg, tuntap_options::msg_channel, net_ctx_reset(), openvpn_execve_check(), tuntap::options, print_in6_addr(), r6, route_ipv6_ipapi(), RT_ADDED, RT_DEFINED, RT_METRIC_DEFINED, and tuntap::type.

Referenced by add_routes(), delete_route_connected_v6_net(), and delete_routes_v6().

delete_routes()

void delete_routes	(	struct route_list *	rl,
		struct route_ipv6_list *	rl6,
		const struct tuntap *	tt,
		unsigned int	flags,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 1158 of file route.c.

References delete_routes_v4(), delete_routes_v6(), and route_ipv6::flags.

Referenced by do_close_tun().

delete_routes_v4()

void delete_routes_v4	(	struct route_list *	rl,
		const struct tuntap *	tt,
		unsigned int	flags,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 1166 of file route.c.

References clear_route_list(), delete_route(), route_ipv4::flags, route_list::iflags, route_ipv4::next, route_list::rgi, RL_ROUTES_ADDED, route_list::routes, and undo_redirect_default_route_to_vpn().

Referenced by delete_routes(), remove_option(), and update_option().

delete_routes_v6()

void delete_routes_v6	(	struct route_ipv6_list *	rl6,
		const struct tuntap *	tt,
		unsigned int	flags,
		const struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 1188 of file route.c.

References clear_route_ipv6_list(), delete_route_ipv6(), route_ipv6_list::iflags, r6, RL_ROUTES_ADDED, and route_ipv6_list::routes_ipv6.

Referenced by delete_routes(), remove_option(), and update_option().

get_default_gateway()

void get_default_gateway	(	struct route_gateway_info *	rgi,
		in_addr_t	dest,
		openvpn_net_ctx_t *	ctx )

Retrieves the best gateway for a given destination based on the routing table.

Parameters

rgi	Pointer to a struct to store the gateway information.
dest	Destination IP address in host byte order.
ctx	Pointer to a platform-specific network context struct.

Definition at line 2534 of file route.c.

References route_gateway_info::adapter_index, route_gateway_address::addr, CLEAR, route_gateway_info::flags, route_gateway_info::gateway, gc, gc_free(), gc_new(), get_adapter(), get_adapter_info_list(), get_best_route(), route_gateway_info::hwaddr, route_gateway_address::netmask, RGI_ADDR_DEFINED, RGI_HWADDR_DEFINED, RGI_IFACE_DEFINED, RGI_NETMASK_DEFINED, RGI_ON_LINK, and status.

Referenced by add_option(), init_route_list(), push_peer_info(), and warn_on_use_of_common_subnets().

get_default_gateway_ipv6()

void get_default_gateway_ipv6	(	struct route_ipv6_gateway_info *	rgi,
		const struct in6_addr *	dest,
		openvpn_net_ctx_t *	ctx )

Definition at line 2631 of file route.c.

References route_ipv6_gateway_info::adapter_index, route_ipv6_gateway_address::addr_ipv6, CLEAR, D_ROUTE, route_ipv6_gateway_info::flags, route_ipv6_gateway_info::gateway, gc, gc_free(), gc_new(), get_best_route(), msg, print_in6_addr(), RGI_ADDR_DEFINED, RGI_IFACE_DEFINED, RGI_ON_LINK, and status.

Referenced by add_option(), and init_route_ipv6_list().

init_route_ipv6_list()

bool init_route_ipv6_list	(	struct route_ipv6_list *	rl6,
		const struct route_ipv6_option_list *	opt6,
		const char *	remote_endpoint,
		int	default_metric,
		const struct in6_addr *	remote_host,
		struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 740 of file route.c.

References route_ipv6_gateway_info::adapter_index, route_ipv6_gateway_address::addr_ipv6, ALLOC_OBJ_CLEAR_GC, ALLOC_OBJ_GC, clear_route_ipv6_list(), D_ROUTE, route_ipv6_list::default_metric, dmsg, route_ipv6_gateway_info::flags, route_ipv6_list::flags, route_ipv6_option_list::flags, route_ipv6_gateway_info::gateway, gc, route_ipv6_list::gc, gc_free(), gc_new(), get_default_gateway_ipv6(), init_route_ipv6(), ipv6_net_contains_host(), is_route_parm_defined(), M_WARN, msg, route_ipv6_option::next, route_ipv6_list::ngi6, print_default_gateway(), print_in6_addr(), r6, route_ipv6_list::remote_endpoint_ipv6, route_ipv6_list::remote_host_ipv6, route_ipv6_list::rgi6, RGI_ADDR_DEFINED, RGI_IFACE_DEFINED, RGI_ON_LINK, route_ipv6_list::routes_ipv6, route_ipv6_option_list::routes_ipv6, RT_DEFINED, RT_METRIC_DEFINED, RTSA_DEFAULT_METRIC, RTSA_REMOTE_ENDPOINT, RTSA_REMOTE_HOST, setenv_str(), and route_ipv6_list::spec_flags.

Referenced by do_init_route_ipv6_list().

init_route_list()

bool init_route_list	(	struct route_list *	rl,
		const struct route_option_list *	opt,
		const char *	remote_endpoint,
		int	default_metric,
		in_addr_t	remote_host,
		struct env_set *	es,
		openvpn_net_ctx_t *	ctx )

Definition at line 594 of file route.c.

References add_block_local_routes(), route_gateway_address::addr, ALLOC_OBJ_GC, block_local_needed(), route_special_addr::bypass, clear_route_list(), D_ROUTE, route_special_addr::default_metric, dmsg, route_gateway_info::flags, route_list::flags, route_option_list::flags, route_special_addr::flags, route_gateway_info::gateway, gc, route_list::gc, gc_addspecial(), gc_free(), gc_freeaddrinfo_callback(), gc_new(), get_bypass_addresses(), get_default_gateway(), getaddr(), GETADDR_HOST_ORDER, GETADDR_RESOLVE, GETADDR_WARN_ON_SIGNAL, init_route(), IPV4_INVALID_ADDR, is_route_parm_defined(), M_WARN, msg, route_ipv4::network, route_option::next, route_list::ngi, print_bypass_addresses(), print_default_gateway(), route_special_addr::remote_endpoint, route_special_addr::remote_host, route_special_addr::remote_host_local, RG_ENABLE, route_list::rgi, RGI_ADDR_DEFINED, route_list::routes, route_option_list::routes, RTSA_DEFAULT_METRIC, RTSA_REMOTE_ENDPOINT, RTSA_REMOTE_HOST, setenv_route_addr(), route_list::spec, and test_local_addr().

Referenced by do_init_route_list().

ipv6_net_contains_host()

bool ipv6_net_contains_host	(	const struct in6_addr *	network,
		unsigned int	bits,
		const struct in6_addr *	host )

check whether an IPv6 host address is covered by a given network/bits

Parameters

network	the network address
bits	the network mask
host	the host address to be checked if it is contained by the network

Returns

true if the host address is covered by the network with the given network mask by bits

Definition at line 706 of file route.c.

References route_ipv4::network.

Referenced by init_route_ipv6_list(), and multi_check_push_ifconfig_ipv6_extra_route().

is_special_addr()

bool is_special_addr

(

const char *

addr_str

)

Definition at line 289 of file route.c.

References get_special_addr().

Referenced by add_option(), and check_route_option().

netbits_to_netmask()

in_addr_t netbits_to_netmask ( const int netbits )

inlinestatic

Definition at line 399 of file route.h.

References IPV4_NETMASK_HOST.

Referenced by mroute_addr_mask_host_bits(), mroute_addr_print_ex(), netmask_to_netbits(), netmask_to_netbits2(), print_netmask(), and remove_iroutes_from_push_route_list().

netmask_to_netbits()

bool netmask_to_netbits	(	const in_addr_t	network,
		const in_addr_t	netmask,
		int *	netbits )

Definition at line 3829 of file route.c.

References netbits_to_netmask().

Referenced by do_route_ipv4_service(), and helper_client_server().

netmask_to_netbits2()

int netmask_to_netbits2

(

in_addr_t

netmask

)

Definition at line 3859 of file route.c.

References netbits_to_netmask().

Referenced by add_route(), delete_route(), do_address_service(), do_ifconfig_ipv4(), option_iroute(), and undo_ifconfig_ipv4().

new_route_ipv6_option_list()

struct route_ipv6_option_list * new_route_ipv6_option_list

(

struct gc_arena *

a

)

Definition at line 140 of file route.c.

References ALLOC_OBJ_CLEAR_GC, and route_ipv6_option_list::gc.

Referenced by rol6_check_alloc().

new_route_option_list()

struct route_option_list * new_route_option_list

(

struct gc_arena *

a

)

Definition at line 131 of file route.c.

References ALLOC_OBJ_CLEAR_GC, and route_option_list::gc.

Referenced by rol_check_alloc().

print_default_gateway()

void print_default_gateway	(	const msglvl_t	msglevel,
		const struct route_gateway_info *	rgi,
		const struct route_ipv6_gateway_info *	rgi6 )

Definition at line 1244 of file route.c.

References route_gateway_info::adapter_index, route_ipv6_gateway_info::adapter_index, route_gateway_address::addr, route_ipv6_gateway_address::addr_ipv6, alloc_buf_gc(), BSTR, buf_printf(), route_gateway_info::flags, route_ipv6_gateway_info::flags, format_hex_ex(), route_gateway_info::gateway, route_ipv6_gateway_info::gateway, gc, gc_free(), gc_new(), route_gateway_info::hwaddr, route_ipv6_gateway_info::hwaddr, msg, route_ipv6_gateway_address::netbits_ipv6, route_gateway_address::netmask, print_in6_addr(), print_in_addr_t(), RGI_ADDR_DEFINED, RGI_HWADDR_DEFINED, RGI_IFACE_DEFINED, RGI_NETMASK_DEFINED, and RGI_ON_LINK.

Referenced by add_option(), init_route_ipv6_list(), and init_route_list().

print_route_options()

void print_route_options	(	const struct route_option_list *	rol,
		msglvl_t	msglevel )

Definition at line 1230 of file route.c.

References route_option_list::flags, msg, route_option::next, print_route_option(), RG_ENABLE, RG_LOCAL, and route_option_list::routes.

Referenced by show_settings().

route_did_redirect_default_gateway()

int route_did_redirect_default_gateway ( const struct route_list * rl )

inlinestatic

Definition at line 411 of file route.h.

References BOOL_CAST, route_list::iflags, and RL_DID_REDIRECT_DEFAULT_GATEWAY.

Referenced by do_route().

route_ipv6_clear_host_bits()

void route_ipv6_clear_host_bits

(

struct route_ipv6 *

r6

)

Definition at line 1734 of file route.c.

References r6.

Referenced by add_route_ipv6(), and delete_route_connected_v6_net().

route_list_add_vpn_gateway()

void route_list_add_vpn_gateway	(	struct route_list *	rl,
		struct env_set *	es,
		const in_addr_t	addr )

Definition at line 525 of file route.c.

References ASSERT, route_special_addr::flags, route_special_addr::remote_endpoint, RTSA_REMOTE_ENDPOINT, setenv_route_addr(), and route_list::spec.

Referenced by process_ip_header().

setenv_routes()

void setenv_routes	(	struct env_set *	es,
		const struct route_list *	rl )

Definition at line 1338 of file route.c.

References route_ipv4::next, route_list::routes, and setenv_route().

Referenced by do_init_route_list().

setenv_routes_ipv6()

void setenv_routes_ipv6	(	struct env_set *	es,
		const struct route_ipv6_list *	rl6 )

Definition at line 1375 of file route.c.

References r6, route_ipv6_list::routes_ipv6, and setenv_route_ipv6().

Referenced by do_init_route_ipv6_list().

show_routes()

void show_routes

(

msglvl_t

msglevel

)

Definition at line 3031 of file route.c.

References format_route_entry(), gc, gc_free(), gc_new(), get_windows_routing_table(), and msg.

Referenced by add_option(), check_add_routes(), do_route(), initialization_sequence_completed(), and management_show_net_callback().

test_local_addr()

int test_local_addr	(	const in_addr_t	addr,
		const struct route_gateway_info *	rgi )

Definition at line 3967 of file route.c.

References gc, gc_free(), gc_new(), get_windows_routing_table(), TLA_LOCAL, and TLA_NONLOCAL.

Referenced by add_host_route_if_nonlocal(), and init_route_list().

test_routes()

bool test_routes	(	const struct route_list *	rl,
		const struct tuntap *	tt )

Definition at line 2407 of file route.c.

References D_ROUTE, tuntap::did_ifconfig_setup, route_list::flags, route_special_addr::flags, route_ipv4::gateway, gc, gc_free(), gc_new(), get_adapter_info_list(), is_adapter_up(), msg, route_ipv4::next, route_special_addr::remote_endpoint, RG_ENABLE, route_list::routes, RTSA_REMOTE_ENDPOINT, route_list::spec, and test_route_helper().

Referenced by check_add_routes().