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|
/*
* BIRD -- Wireguard Protocol Configuration
*
* (c) 1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#define LOCAL_DEBUG
#include "proto/wireguard/wireguard.h"
CF_DEFINES
#define WG_DEFAULT_TUNNEL_TYPE 51820
#define WG_CFG ((struct wg_config *) this_proto)
static struct peer_config *this_peer = NULL;
typedef char wg_key_b64_string[45];
int wg_key_from_base64(u8 key[32], const wg_key_b64_string base64);
static struct f_tree *
f_new_sub_tlv_wg(u32 type, const struct bytestring *bs)
{
struct f_tree *t = f_new_tree();
t->right = t;
t->from.type = t->to.type = T_SUBTLV;
struct te_subtlv v;
v.type = TLV_ENCAPSULATION;
v.u.tunnel_encap.type = type;
v.u.tunnel_encap.data = NULL;
v.u.tunnel_encap.length = 0;
if (bs && bs->length == sizeof(wg_key))
{
#if 1
// encap type 0
v.u.tunnel_encap.data = bs->data;
v.u.tunnel_encap.length = bs->length;
#else
// encap type 1
v.u.tunnel_encap.length = 4 + bs->length;
void *data = cfg_alloc(v.u.tunnel_encap.length);
memset(data, 0, 4);
memcpy(data + 4, bs->data, bs->length);
v.u.tunnel_encap.data = data;
#endif
}
else if (bs)
{
cf_error( "Invalid WireGuard key" );
}
t->from.val.st = v;
t->to.val.st = v;
return t;
}
CF_DECLS
%type <g> allowed_ip allowed_ips
%type <bs> wg_key
CF_KEYWORDS(WIREGUARD, TUNNEL_TYPE, PRIVATE_KEY, LISTEN_PORT, PUBLIC_KEY, ENDPOINT, ALLOWED_IPS)
CF_GRAMMAR
proto: wireguard_proto '}' ;
sub_tlv_item:
'(' WIREGUARD ',' wg_key ')' { $$ = f_new_sub_tlv_wg(WG_DEFAULT_TUNNEL_TYPE, $4); }
| '(' WIREGUARD ',' cnum ',' wg_key ')' { $$ = f_new_sub_tlv_wg($4, $6); }
;
wireguard_proto_start: proto_start WIREGUARD {
this_proto = proto_config_new(&proto_wireguard, $1);
init_list(&WG_CFG->peers);
WG_CFG->tunnel_type = WG_DEFAULT_TUNNEL_TYPE;
}
;
wireguard_proto:
wireguard_proto_start proto_name '{'
| wireguard_proto wg_proto_channel ';'
| wireguard_proto proto_item ';'
| wireguard_proto TUNNEL_TYPE tunnel_type ';'
| wireguard_proto INTERFACE TEXT ';' { WG_CFG->ifname = $3; }
| wireguard_proto PRIVATE_KEY private_key ';'
| wireguard_proto LISTEN_PORT listen_port ';'
| wireguard_proto wg_peer ';'
;
wg_peer: wg_peer_start wg_peer_opt_list wg_peer_end;
wg_peer_start: PEER { this_peer = peer_new(WG_CFG); }
wg_peer_end: {
this_peer = NULL;
}
;
wg_peer_item:
PUBLIC_KEY public_key
| ENDPOINT endpoint
| PORT port
| ALLOWED_IPS allowed_ips { this_peer->allowedips = $2; }
;
wg_peer_opts:
/* empty */
| wg_peer_opts wg_peer_item ';'
;
wg_peer_opt_list:
'{' wg_peer_opts '}'
;
tunnel_type: expr { WG_CFG->tunnel_type = $1; }
private_key: wg_key { WG_CFG->private_key = $1->data; }
listen_port: expr { WG_CFG->listen_port = $1; }
public_key: wg_key { this_peer->public_key = $1->data; }
endpoint: ipa { this_peer->endpoint = $1; }
port: expr { this_peer->remote_port = $1; }
allowed_ips: allowed_ip {
struct wg_allowedips *aips = cfg_alloc(sizeof(struct wg_allowedips));
aips->first_allowedip = $1;
aips->last_allowedip = $1;
$$ = aips;
}
| allowed_ips ',' allowed_ip {
struct wg_allowedips *aips = $1;
struct wg_allowedip *aip = $3;
aips->last_allowedip->next_allowedip = aip;
aips->last_allowedip = aip;
$$ = aips;
}
;
allowed_ip:
net_or_ipa {
struct wg_allowedip *aip = cfg_alloc(sizeof(struct wg_allowedip));
switch ($1.type)
{
case NET_IP4:
aip->family = AF_INET;
aip->ip4 = ipa_to_in4(net_prefix(&($1)));
aip->cidr = net_pxlen(&($1));
break;
case NET_IP6:
aip->family = AF_INET6;
aip->ip6 = ipa_to_in6(net_prefix(&($1)));
aip->cidr = net_pxlen(&($1));
break;
default:
cf_error( "Unknown net type: %d", $1.type );
}
aip->next_allowedip = NULL;
$$ = aip;
}
;
wg_proto_channel: wg_channel_start channel_opt_list wg_channel_end;
wg_channel_start: net_type
{
this_channel = channel_config_get(&channel_wg, net_label[$1], $1, this_proto);
}
wg_channel_end:
{
this_channel = NULL;
}
wg_key: bytestring
{
if ($1->length != sizeof(wg_key))
cf_error( "Invalid WireGuard key" );
$$ = $1;
}
CF_CODE
CF_END
|
