| #pragma once |
| |
| /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR MIT) |
| * |
| * Copyright (C) 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. |
| * |
| * Documentation |
| * ============= |
| * |
| * The below enums and macros are for interfacing with WireGuard, using generic |
| * netlink, with family WG_GENL_NAME and version WG_GENL_VERSION. It defines two |
| * methods: get and set. Note that while they share many common attributes, these |
| * two functions actually accept a slightly different set of inputs and outputs. |
| * |
| * WG_CMD_GET_DEVICE |
| * ----------------- |
| * |
| * May only be called via NLM_F_REQUEST | NLM_F_DUMP. The command should contain |
| * one but not both of: |
| * |
| * WGDEVICE_A_IFINDEX: NLA_U32 |
| * WGDEVICE_A_IFNAME: NLA_NUL_STRING, maxlen IFNAMESIZ - 1 |
| * |
| * The kernel will then return several messages (NLM_F_MULTI) containing the following |
| * tree of nested items: |
| * |
| * WGDEVICE_A_IFINDEX: NLA_U32 |
| * WGDEVICE_A_IFNAME: NLA_NUL_STRING, maxlen IFNAMESIZ - 1 |
| * WGDEVICE_A_PRIVATE_KEY: len WG_KEY_LEN |
| * WGDEVICE_A_PUBLIC_KEY: len WG_KEY_LEN |
| * WGDEVICE_A_LISTEN_PORT: NLA_U16 |
| * WGDEVICE_A_FWMARK: NLA_U32 |
| * WGDEVICE_A_PEERS: NLA_NESTED |
| * 0: NLA_NESTED |
| * WGPEER_A_PUBLIC_KEY: len WG_KEY_LEN |
| * WGPEER_A_PRESHARED_KEY: len WG_KEY_LEN |
| * WGPEER_A_ENDPOINT: struct sockaddr_in or struct sockaddr_in6 |
| * WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL: NLA_U16 |
| * WGPEER_A_LAST_HANDSHAKE_TIME: struct timespec |
| * WGPEER_A_RX_BYTES: NLA_U64 |
| * WGPEER_A_TX_BYTES: NLA_U64 |
| * WGPEER_A_ALLOWEDIPS: NLA_NESTED |
| * 0: NLA_NESTED |
| * WGALLOWEDIP_A_FAMILY: NLA_U16 |
| * WGALLOWEDIP_A_IPADDR: struct in_addr or struct in6_addr |
| * WGALLOWEDIP_A_CIDR_MASK: NLA_U8 |
| * 1: NLA_NESTED |
| * ... |
| * 2: NLA_NESTED |
| * ... |
| * ... |
| * 1: NLA_NESTED |
| * ... |
| * ... |
| * |
| * It is possible that all of the allowed IPs of a single peer will not |
| * fit within a single netlink message. In that case, the same peer will |
| * be written in the following message, except it will only contain |
| * WGPEER_A_PUBLIC_KEY and WGPEER_A_ALLOWEDIPS. This may occur several |
| * times in a row for the same peer. It is then up to the receiver to |
| * coalesce adjacent peers. Likewise, it is possible that all peers will |
| * not fit within a single message. So, subsequent peers will be sent |
| * in following messages, except those will only contain WGDEVICE_A_IFNAME |
| * and WGDEVICE_A_PEERS. It is then up to the receiver to coalesce these |
| * messages to form the complete list of peers. |
| * |
| * Since this is an NLA_F_DUMP command, the final message will always be |
| * NLMSG_DONE, even if an error occurs. However, this NLMSG_DONE message |
| * contains an integer error code. It is either zero or a negative error |
| * code corresponding to the errno. |
| * |
| * WG_CMD_SET_DEVICE |
| * ----------------- |
| * |
| * May only be called via NLM_F_REQUEST. The command should contain the following |
| * tree of nested items, containing one but not both of WGDEVICE_A_IFINDEX |
| * and WGDEVICE_A_IFNAME: |
| * |
| * WGDEVICE_A_IFINDEX: NLA_U32 |
| * WGDEVICE_A_IFNAME: NLA_NUL_STRING, maxlen IFNAMESIZ - 1 |
| * WGDEVICE_A_FLAGS: NLA_U32, 0 or WGDEVICE_F_REPLACE_PEERS if all current |
| * peers should be removed prior to adding the list below. |
| * WGDEVICE_A_PRIVATE_KEY: len WG_KEY_LEN, all zeros to remove |
| * WGDEVICE_A_LISTEN_PORT: NLA_U16, 0 to choose randomly |
| * WGDEVICE_A_FWMARK: NLA_U32, 0 to disable |
| * WGDEVICE_A_PEERS: NLA_NESTED |
| * 0: NLA_NESTED |
| * WGPEER_A_PUBLIC_KEY: len WG_KEY_LEN |
| * WGPEER_A_FLAGS: NLA_U32, 0 and/or WGPEER_F_REMOVE_ME if the specified peer |
| * should be removed rather than added/updated and/or |
| * WGPEER_F_REPLACE_ALLOWEDIPS if all current allowed IPs of |
| * this peer should be removed prior to adding the list below. |
| * WGPEER_A_PRESHARED_KEY: len WG_KEY_LEN, all zeros to remove |
| * WGPEER_A_ENDPOINT: struct sockaddr_in or struct sockaddr_in6 |
| * WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL: NLA_U16, 0 to disable |
| * WGPEER_A_ALLOWEDIPS: NLA_NESTED |
| * 0: NLA_NESTED |
| * WGALLOWEDIP_A_FAMILY: NLA_U16 |
| * WGALLOWEDIP_A_IPADDR: struct in_addr or struct in6_addr |
| * WGALLOWEDIP_A_CIDR_MASK: NLA_U8 |
| * 1: NLA_NESTED |
| * ... |
| * 2: NLA_NESTED |
| * ... |
| * ... |
| * 1: NLA_NESTED |
| * ... |
| * ... |
| * |
| * It is possible that the amount of configuration data exceeds that of |
| * the maximum message length accepted by the kernel. In that case, |
| * several messages should be sent one after another, with each |
| * successive one filling in information not contained in the prior. Note |
| * that if WGDEVICE_F_REPLACE_PEERS is specified in the first message, it |
| * probably should not be specified in fragments that come after, so that |
| * the list of peers is only cleared the first time but appened after. |
| * Likewise for peers, if WGPEER_F_REPLACE_ALLOWEDIPS is specified in the |
| * first message of a peer, it likely should not be specified in subsequent |
| * fragments. |
| * |
| * If an error occurs, NLMSG_ERROR will reply containing an errno. |
| */ |
| |
| #define WG_GENL_NAME "wireguard" |
| #define WG_GENL_VERSION 1 |
| |
| #define WG_KEY_LEN 32 |
| |
| enum wg_cmd { |
| WG_CMD_GET_DEVICE, |
| WG_CMD_SET_DEVICE, |
| __WG_CMD_MAX |
| }; |
| #define WG_CMD_MAX (__WG_CMD_MAX - 1) |
| |
| enum wgdevice_flag { |
| WGDEVICE_F_REPLACE_PEERS = 1U << 0 |
| }; |
| enum wgdevice_attribute { |
| WGDEVICE_A_UNSPEC, |
| WGDEVICE_A_IFINDEX, |
| WGDEVICE_A_IFNAME, |
| WGDEVICE_A_PRIVATE_KEY, |
| WGDEVICE_A_PUBLIC_KEY, |
| WGDEVICE_A_FLAGS, |
| WGDEVICE_A_LISTEN_PORT, |
| WGDEVICE_A_FWMARK, |
| WGDEVICE_A_PEERS, |
| __WGDEVICE_A_LAST |
| }; |
| #define WGDEVICE_A_MAX (__WGDEVICE_A_LAST - 1) |
| |
| enum wgpeer_flag { |
| WGPEER_F_REMOVE_ME = 1U << 0, |
| WGPEER_F_REPLACE_ALLOWEDIPS = 1U << 1 |
| }; |
| enum wgpeer_attribute { |
| WGPEER_A_UNSPEC, |
| WGPEER_A_PUBLIC_KEY, |
| WGPEER_A_PRESHARED_KEY, |
| WGPEER_A_FLAGS, |
| WGPEER_A_ENDPOINT, |
| WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, |
| WGPEER_A_LAST_HANDSHAKE_TIME, |
| WGPEER_A_RX_BYTES, |
| WGPEER_A_TX_BYTES, |
| WGPEER_A_ALLOWEDIPS, |
| __WGPEER_A_LAST |
| }; |
| #define WGPEER_A_MAX (__WGPEER_A_LAST - 1) |
| |
| enum wgallowedip_attribute { |
| WGALLOWEDIP_A_UNSPEC, |
| WGALLOWEDIP_A_FAMILY, |
| WGALLOWEDIP_A_IPADDR, |
| WGALLOWEDIP_A_CIDR_MASK, |
| __WGALLOWEDIP_A_LAST |
| }; |
| #define WGALLOWEDIP_A_MAX (__WGALLOWEDIP_A_LAST - 1) |