1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
* 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 adata *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
|
