1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 /*
3 * Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
4 */
5
6 #ifndef CONTAINERS_H
7 #define CONTAINERS_H
8
9 #include <stdint.h>
10 #include <stdlib.h>
11 #include <time.h>
12 #include <sys/socket.h>
13 #include <net/if.h>
14 #include <netinet/in.h>
15 #if defined(__linux__)
16 #include <linux/wireguard.h>
17 #elif defined(__OpenBSD__)
18 #include <net/if_wg.h>
19 #endif
20
21 #ifndef WG_KEY_LEN
22 #define WG_KEY_LEN 32
23 #endif
24
25 /* Cross platform __kernel_timespec */
26 struct timespec64 {
27 int64_t tv_sec;
28 int64_t tv_nsec;
29 };
30
31 struct wgallowedip {
32 uint16_t family;
33 union {
34 struct in_addr ip4;
35 struct in6_addr ip6;
36 };
37 uint8_t cidr;
38 struct wgallowedip *next_allowedip;
39 };
40
41 enum {
42 WGPEER_REMOVE_ME = 1U << 0,
43 WGPEER_REPLACE_ALLOWEDIPS = 1U << 1,
44 WGPEER_HAS_PUBLIC_KEY = 1U << 2,
45 WGPEER_HAS_PRESHARED_KEY = 1U << 3,
46 WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL = 1U << 4
47 };
48
49 struct wgpeer {
50 uint32_t flags;
51
52 uint8_t public_key[WG_KEY_LEN];
53 uint8_t preshared_key[WG_KEY_LEN];
54
55 union {
56 struct sockaddr addr;
57 struct sockaddr_in addr4;
58 struct sockaddr_in6 addr6;
59 } endpoint;
60
61 struct timespec64 last_handshake_time;
62 uint64_t rx_bytes, tx_bytes;
63 uint16_t persistent_keepalive_interval;
64
65 struct wgallowedip *first_allowedip, *last_allowedip;
66 struct wgpeer *next_peer;
67 };
68
69 enum {
70 WGDEVICE_REPLACE_PEERS = 1U << 0,
71 WGDEVICE_HAS_PRIVATE_KEY = 1U << 1,
72 WGDEVICE_HAS_PUBLIC_KEY = 1U << 2,
73 WGDEVICE_HAS_LISTEN_PORT = 1U << 3,
74 WGDEVICE_HAS_FWMARK = 1U << 4
75 };
76
77 struct wgdevice {
78 char name[IFNAMSIZ];
79 uint32_t ifindex;
80
81 uint32_t flags;
82
83 uint8_t public_key[WG_KEY_LEN];
84 uint8_t private_key[WG_KEY_LEN];
85
86 uint32_t fwmark;
87 uint16_t listen_port;
88
89 struct wgpeer *first_peer, *last_peer;
90 };
91
92 #define for_each_wgpeer(__dev, __peer) for ((__peer) = (__dev)->first_peer; (__peer); (__peer) = (__peer)->next_peer)
93 #define for_each_wgallowedip(__peer, __allowedip) for ((__allowedip) = (__peer)->first_allowedip; (__allowedip); (__allowedip) = (__allowedip)->next_allowedip)
94
free_wgdevice(struct wgdevice * dev)95 static inline void free_wgdevice(struct wgdevice *dev)
96 {
97 if (!dev)
98 return;
99 for (struct wgpeer *peer = dev->first_peer, *np = peer ? peer->next_peer : NULL; peer; peer = np, np = peer ? peer->next_peer : NULL) {
100 for (struct wgallowedip *allowedip = peer->first_allowedip, *na = allowedip ? allowedip->next_allowedip : NULL; allowedip; allowedip = na, na = allowedip ? allowedip->next_allowedip : NULL)
101 free(allowedip);
102 free(peer);
103 }
104 free(dev);
105 }
106
107 #endif
108