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 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