![Jason A. Donenfeld](/assets/img/avatar_default.png)
We precompute the static-static ECDH during configuration time, in order to save an expensive computation later when receiving network packets. However, not all ECDH computations yield a contributory result. Prior, we were just not letting those peers be added to the interface. However, this creates a strange inconsistency, since it was still possible to add other weird points, like a valid public key plus a low-order point, and, like points that result in zeros, a handshake would not complete. In order to make the behavior more uniform and less surprising, simply allow all peers to be added. Then, we'll error out later when doing the crypto if there's an issue. This also adds more separation between the crypto layer and the configuration layer. Discussed-with: Mathias Hall-Andersen <mathias@hall-andersen.dk> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: David S. Miller <davem@davemloft.net>
637 lines
18 KiB
C
637 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include "netlink.h"
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#include "device.h"
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#include "peer.h"
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#include "socket.h"
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#include "queueing.h"
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#include "messages.h"
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#include <uapi/linux/wireguard.h>
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#include <linux/if.h>
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#include <net/genetlink.h>
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#include <net/sock.h>
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#include <crypto/algapi.h>
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static struct genl_family genl_family;
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static const struct nla_policy device_policy[WGDEVICE_A_MAX + 1] = {
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[WGDEVICE_A_IFINDEX] = { .type = NLA_U32 },
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[WGDEVICE_A_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ - 1 },
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[WGDEVICE_A_PRIVATE_KEY] = { .type = NLA_EXACT_LEN, .len = NOISE_PUBLIC_KEY_LEN },
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[WGDEVICE_A_PUBLIC_KEY] = { .type = NLA_EXACT_LEN, .len = NOISE_PUBLIC_KEY_LEN },
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[WGDEVICE_A_FLAGS] = { .type = NLA_U32 },
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[WGDEVICE_A_LISTEN_PORT] = { .type = NLA_U16 },
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[WGDEVICE_A_FWMARK] = { .type = NLA_U32 },
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[WGDEVICE_A_PEERS] = { .type = NLA_NESTED }
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};
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static const struct nla_policy peer_policy[WGPEER_A_MAX + 1] = {
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[WGPEER_A_PUBLIC_KEY] = { .type = NLA_EXACT_LEN, .len = NOISE_PUBLIC_KEY_LEN },
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[WGPEER_A_PRESHARED_KEY] = { .type = NLA_EXACT_LEN, .len = NOISE_SYMMETRIC_KEY_LEN },
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[WGPEER_A_FLAGS] = { .type = NLA_U32 },
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[WGPEER_A_ENDPOINT] = { .type = NLA_MIN_LEN, .len = sizeof(struct sockaddr) },
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[WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL] = { .type = NLA_U16 },
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[WGPEER_A_LAST_HANDSHAKE_TIME] = { .type = NLA_EXACT_LEN, .len = sizeof(struct __kernel_timespec) },
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[WGPEER_A_RX_BYTES] = { .type = NLA_U64 },
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[WGPEER_A_TX_BYTES] = { .type = NLA_U64 },
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[WGPEER_A_ALLOWEDIPS] = { .type = NLA_NESTED },
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[WGPEER_A_PROTOCOL_VERSION] = { .type = NLA_U32 }
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};
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static const struct nla_policy allowedip_policy[WGALLOWEDIP_A_MAX + 1] = {
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[WGALLOWEDIP_A_FAMILY] = { .type = NLA_U16 },
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[WGALLOWEDIP_A_IPADDR] = { .type = NLA_MIN_LEN, .len = sizeof(struct in_addr) },
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[WGALLOWEDIP_A_CIDR_MASK] = { .type = NLA_U8 }
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};
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static struct wg_device *lookup_interface(struct nlattr **attrs,
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struct sk_buff *skb)
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{
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struct net_device *dev = NULL;
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if (!attrs[WGDEVICE_A_IFINDEX] == !attrs[WGDEVICE_A_IFNAME])
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return ERR_PTR(-EBADR);
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if (attrs[WGDEVICE_A_IFINDEX])
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dev = dev_get_by_index(sock_net(skb->sk),
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nla_get_u32(attrs[WGDEVICE_A_IFINDEX]));
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else if (attrs[WGDEVICE_A_IFNAME])
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dev = dev_get_by_name(sock_net(skb->sk),
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nla_data(attrs[WGDEVICE_A_IFNAME]));
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if (!dev)
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return ERR_PTR(-ENODEV);
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if (!dev->rtnl_link_ops || !dev->rtnl_link_ops->kind ||
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strcmp(dev->rtnl_link_ops->kind, KBUILD_MODNAME)) {
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dev_put(dev);
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return ERR_PTR(-EOPNOTSUPP);
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}
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return netdev_priv(dev);
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}
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static int get_allowedips(struct sk_buff *skb, const u8 *ip, u8 cidr,
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int family)
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{
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struct nlattr *allowedip_nest;
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allowedip_nest = nla_nest_start(skb, 0);
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if (!allowedip_nest)
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return -EMSGSIZE;
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if (nla_put_u8(skb, WGALLOWEDIP_A_CIDR_MASK, cidr) ||
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nla_put_u16(skb, WGALLOWEDIP_A_FAMILY, family) ||
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nla_put(skb, WGALLOWEDIP_A_IPADDR, family == AF_INET6 ?
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sizeof(struct in6_addr) : sizeof(struct in_addr), ip)) {
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nla_nest_cancel(skb, allowedip_nest);
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return -EMSGSIZE;
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}
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nla_nest_end(skb, allowedip_nest);
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return 0;
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}
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struct dump_ctx {
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struct wg_device *wg;
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struct wg_peer *next_peer;
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u64 allowedips_seq;
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struct allowedips_node *next_allowedip;
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};
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#define DUMP_CTX(cb) ((struct dump_ctx *)(cb)->args)
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static int
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get_peer(struct wg_peer *peer, struct sk_buff *skb, struct dump_ctx *ctx)
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{
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struct nlattr *allowedips_nest, *peer_nest = nla_nest_start(skb, 0);
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struct allowedips_node *allowedips_node = ctx->next_allowedip;
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bool fail;
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if (!peer_nest)
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return -EMSGSIZE;
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down_read(&peer->handshake.lock);
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fail = nla_put(skb, WGPEER_A_PUBLIC_KEY, NOISE_PUBLIC_KEY_LEN,
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peer->handshake.remote_static);
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up_read(&peer->handshake.lock);
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if (fail)
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goto err;
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if (!allowedips_node) {
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const struct __kernel_timespec last_handshake = {
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.tv_sec = peer->walltime_last_handshake.tv_sec,
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.tv_nsec = peer->walltime_last_handshake.tv_nsec
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};
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down_read(&peer->handshake.lock);
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fail = nla_put(skb, WGPEER_A_PRESHARED_KEY,
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NOISE_SYMMETRIC_KEY_LEN,
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peer->handshake.preshared_key);
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up_read(&peer->handshake.lock);
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if (fail)
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goto err;
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if (nla_put(skb, WGPEER_A_LAST_HANDSHAKE_TIME,
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sizeof(last_handshake), &last_handshake) ||
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nla_put_u16(skb, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
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peer->persistent_keepalive_interval) ||
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nla_put_u64_64bit(skb, WGPEER_A_TX_BYTES, peer->tx_bytes,
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WGPEER_A_UNSPEC) ||
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nla_put_u64_64bit(skb, WGPEER_A_RX_BYTES, peer->rx_bytes,
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WGPEER_A_UNSPEC) ||
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nla_put_u32(skb, WGPEER_A_PROTOCOL_VERSION, 1))
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goto err;
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read_lock_bh(&peer->endpoint_lock);
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if (peer->endpoint.addr.sa_family == AF_INET)
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fail = nla_put(skb, WGPEER_A_ENDPOINT,
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sizeof(peer->endpoint.addr4),
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&peer->endpoint.addr4);
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else if (peer->endpoint.addr.sa_family == AF_INET6)
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fail = nla_put(skb, WGPEER_A_ENDPOINT,
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sizeof(peer->endpoint.addr6),
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&peer->endpoint.addr6);
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read_unlock_bh(&peer->endpoint_lock);
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if (fail)
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goto err;
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allowedips_node =
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list_first_entry_or_null(&peer->allowedips_list,
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struct allowedips_node, peer_list);
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}
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if (!allowedips_node)
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goto no_allowedips;
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if (!ctx->allowedips_seq)
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ctx->allowedips_seq = peer->device->peer_allowedips.seq;
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else if (ctx->allowedips_seq != peer->device->peer_allowedips.seq)
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goto no_allowedips;
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allowedips_nest = nla_nest_start(skb, WGPEER_A_ALLOWEDIPS);
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if (!allowedips_nest)
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goto err;
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list_for_each_entry_from(allowedips_node, &peer->allowedips_list,
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peer_list) {
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u8 cidr, ip[16] __aligned(__alignof(u64));
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int family;
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family = wg_allowedips_read_node(allowedips_node, ip, &cidr);
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if (get_allowedips(skb, ip, cidr, family)) {
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nla_nest_end(skb, allowedips_nest);
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nla_nest_end(skb, peer_nest);
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ctx->next_allowedip = allowedips_node;
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return -EMSGSIZE;
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}
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}
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nla_nest_end(skb, allowedips_nest);
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no_allowedips:
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nla_nest_end(skb, peer_nest);
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ctx->next_allowedip = NULL;
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ctx->allowedips_seq = 0;
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return 0;
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err:
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nla_nest_cancel(skb, peer_nest);
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return -EMSGSIZE;
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}
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static int wg_get_device_start(struct netlink_callback *cb)
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{
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struct wg_device *wg;
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wg = lookup_interface(genl_dumpit_info(cb)->attrs, cb->skb);
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if (IS_ERR(wg))
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return PTR_ERR(wg);
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DUMP_CTX(cb)->wg = wg;
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return 0;
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}
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static int wg_get_device_dump(struct sk_buff *skb, struct netlink_callback *cb)
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{
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struct wg_peer *peer, *next_peer_cursor;
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struct dump_ctx *ctx = DUMP_CTX(cb);
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struct wg_device *wg = ctx->wg;
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struct nlattr *peers_nest;
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int ret = -EMSGSIZE;
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bool done = true;
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void *hdr;
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rtnl_lock();
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mutex_lock(&wg->device_update_lock);
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cb->seq = wg->device_update_gen;
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next_peer_cursor = ctx->next_peer;
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hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
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&genl_family, NLM_F_MULTI, WG_CMD_GET_DEVICE);
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if (!hdr)
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goto out;
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genl_dump_check_consistent(cb, hdr);
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if (!ctx->next_peer) {
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if (nla_put_u16(skb, WGDEVICE_A_LISTEN_PORT,
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wg->incoming_port) ||
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nla_put_u32(skb, WGDEVICE_A_FWMARK, wg->fwmark) ||
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nla_put_u32(skb, WGDEVICE_A_IFINDEX, wg->dev->ifindex) ||
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nla_put_string(skb, WGDEVICE_A_IFNAME, wg->dev->name))
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goto out;
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down_read(&wg->static_identity.lock);
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if (wg->static_identity.has_identity) {
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if (nla_put(skb, WGDEVICE_A_PRIVATE_KEY,
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NOISE_PUBLIC_KEY_LEN,
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wg->static_identity.static_private) ||
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nla_put(skb, WGDEVICE_A_PUBLIC_KEY,
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NOISE_PUBLIC_KEY_LEN,
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wg->static_identity.static_public)) {
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up_read(&wg->static_identity.lock);
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goto out;
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}
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}
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up_read(&wg->static_identity.lock);
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}
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peers_nest = nla_nest_start(skb, WGDEVICE_A_PEERS);
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if (!peers_nest)
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goto out;
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ret = 0;
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/* If the last cursor was removed via list_del_init in peer_remove, then
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* we just treat this the same as there being no more peers left. The
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* reason is that seq_nr should indicate to userspace that this isn't a
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* coherent dump anyway, so they'll try again.
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*/
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if (list_empty(&wg->peer_list) ||
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(ctx->next_peer && list_empty(&ctx->next_peer->peer_list))) {
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nla_nest_cancel(skb, peers_nest);
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goto out;
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}
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lockdep_assert_held(&wg->device_update_lock);
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peer = list_prepare_entry(ctx->next_peer, &wg->peer_list, peer_list);
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list_for_each_entry_continue(peer, &wg->peer_list, peer_list) {
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if (get_peer(peer, skb, ctx)) {
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done = false;
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break;
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}
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next_peer_cursor = peer;
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}
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nla_nest_end(skb, peers_nest);
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out:
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if (!ret && !done && next_peer_cursor)
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wg_peer_get(next_peer_cursor);
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wg_peer_put(ctx->next_peer);
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mutex_unlock(&wg->device_update_lock);
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rtnl_unlock();
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if (ret) {
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genlmsg_cancel(skb, hdr);
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return ret;
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}
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genlmsg_end(skb, hdr);
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if (done) {
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ctx->next_peer = NULL;
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return 0;
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}
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ctx->next_peer = next_peer_cursor;
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return skb->len;
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/* At this point, we can't really deal ourselves with safely zeroing out
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* the private key material after usage. This will need an additional API
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* in the kernel for marking skbs as zero_on_free.
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*/
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}
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static int wg_get_device_done(struct netlink_callback *cb)
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{
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struct dump_ctx *ctx = DUMP_CTX(cb);
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if (ctx->wg)
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dev_put(ctx->wg->dev);
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wg_peer_put(ctx->next_peer);
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return 0;
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}
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static int set_port(struct wg_device *wg, u16 port)
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{
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struct wg_peer *peer;
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if (wg->incoming_port == port)
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return 0;
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list_for_each_entry(peer, &wg->peer_list, peer_list)
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wg_socket_clear_peer_endpoint_src(peer);
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if (!netif_running(wg->dev)) {
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wg->incoming_port = port;
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return 0;
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}
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return wg_socket_init(wg, port);
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}
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static int set_allowedip(struct wg_peer *peer, struct nlattr **attrs)
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{
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int ret = -EINVAL;
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u16 family;
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u8 cidr;
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if (!attrs[WGALLOWEDIP_A_FAMILY] || !attrs[WGALLOWEDIP_A_IPADDR] ||
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!attrs[WGALLOWEDIP_A_CIDR_MASK])
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return ret;
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family = nla_get_u16(attrs[WGALLOWEDIP_A_FAMILY]);
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cidr = nla_get_u8(attrs[WGALLOWEDIP_A_CIDR_MASK]);
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if (family == AF_INET && cidr <= 32 &&
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nla_len(attrs[WGALLOWEDIP_A_IPADDR]) == sizeof(struct in_addr))
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ret = wg_allowedips_insert_v4(
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&peer->device->peer_allowedips,
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nla_data(attrs[WGALLOWEDIP_A_IPADDR]), cidr, peer,
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&peer->device->device_update_lock);
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else if (family == AF_INET6 && cidr <= 128 &&
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nla_len(attrs[WGALLOWEDIP_A_IPADDR]) == sizeof(struct in6_addr))
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ret = wg_allowedips_insert_v6(
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&peer->device->peer_allowedips,
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nla_data(attrs[WGALLOWEDIP_A_IPADDR]), cidr, peer,
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&peer->device->device_update_lock);
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return ret;
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}
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static int set_peer(struct wg_device *wg, struct nlattr **attrs)
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{
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u8 *public_key = NULL, *preshared_key = NULL;
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struct wg_peer *peer = NULL;
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u32 flags = 0;
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int ret;
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ret = -EINVAL;
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if (attrs[WGPEER_A_PUBLIC_KEY] &&
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nla_len(attrs[WGPEER_A_PUBLIC_KEY]) == NOISE_PUBLIC_KEY_LEN)
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public_key = nla_data(attrs[WGPEER_A_PUBLIC_KEY]);
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else
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goto out;
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if (attrs[WGPEER_A_PRESHARED_KEY] &&
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nla_len(attrs[WGPEER_A_PRESHARED_KEY]) == NOISE_SYMMETRIC_KEY_LEN)
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preshared_key = nla_data(attrs[WGPEER_A_PRESHARED_KEY]);
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if (attrs[WGPEER_A_FLAGS])
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flags = nla_get_u32(attrs[WGPEER_A_FLAGS]);
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ret = -EOPNOTSUPP;
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if (flags & ~__WGPEER_F_ALL)
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goto out;
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ret = -EPFNOSUPPORT;
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if (attrs[WGPEER_A_PROTOCOL_VERSION]) {
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if (nla_get_u32(attrs[WGPEER_A_PROTOCOL_VERSION]) != 1)
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goto out;
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}
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peer = wg_pubkey_hashtable_lookup(wg->peer_hashtable,
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nla_data(attrs[WGPEER_A_PUBLIC_KEY]));
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ret = 0;
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if (!peer) { /* Peer doesn't exist yet. Add a new one. */
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if (flags & (WGPEER_F_REMOVE_ME | WGPEER_F_UPDATE_ONLY))
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goto out;
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/* The peer is new, so there aren't allowed IPs to remove. */
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flags &= ~WGPEER_F_REPLACE_ALLOWEDIPS;
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down_read(&wg->static_identity.lock);
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if (wg->static_identity.has_identity &&
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!memcmp(nla_data(attrs[WGPEER_A_PUBLIC_KEY]),
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wg->static_identity.static_public,
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NOISE_PUBLIC_KEY_LEN)) {
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/* We silently ignore peers that have the same public
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* key as the device. The reason we do it silently is
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* that we'd like for people to be able to reuse the
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* same set of API calls across peers.
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*/
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up_read(&wg->static_identity.lock);
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ret = 0;
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goto out;
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}
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up_read(&wg->static_identity.lock);
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peer = wg_peer_create(wg, public_key, preshared_key);
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if (IS_ERR(peer)) {
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ret = PTR_ERR(peer);
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peer = NULL;
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goto out;
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}
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/* Take additional reference, as though we've just been
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* looked up.
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*/
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wg_peer_get(peer);
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}
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if (flags & WGPEER_F_REMOVE_ME) {
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wg_peer_remove(peer);
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goto out;
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}
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if (preshared_key) {
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|
down_write(&peer->handshake.lock);
|
|
memcpy(&peer->handshake.preshared_key, preshared_key,
|
|
NOISE_SYMMETRIC_KEY_LEN);
|
|
up_write(&peer->handshake.lock);
|
|
}
|
|
|
|
if (attrs[WGPEER_A_ENDPOINT]) {
|
|
struct sockaddr *addr = nla_data(attrs[WGPEER_A_ENDPOINT]);
|
|
size_t len = nla_len(attrs[WGPEER_A_ENDPOINT]);
|
|
|
|
if ((len == sizeof(struct sockaddr_in) &&
|
|
addr->sa_family == AF_INET) ||
|
|
(len == sizeof(struct sockaddr_in6) &&
|
|
addr->sa_family == AF_INET6)) {
|
|
struct endpoint endpoint = { { { 0 } } };
|
|
|
|
memcpy(&endpoint.addr, addr, len);
|
|
wg_socket_set_peer_endpoint(peer, &endpoint);
|
|
}
|
|
}
|
|
|
|
if (flags & WGPEER_F_REPLACE_ALLOWEDIPS)
|
|
wg_allowedips_remove_by_peer(&wg->peer_allowedips, peer,
|
|
&wg->device_update_lock);
|
|
|
|
if (attrs[WGPEER_A_ALLOWEDIPS]) {
|
|
struct nlattr *attr, *allowedip[WGALLOWEDIP_A_MAX + 1];
|
|
int rem;
|
|
|
|
nla_for_each_nested(attr, attrs[WGPEER_A_ALLOWEDIPS], rem) {
|
|
ret = nla_parse_nested(allowedip, WGALLOWEDIP_A_MAX,
|
|
attr, allowedip_policy, NULL);
|
|
if (ret < 0)
|
|
goto out;
|
|
ret = set_allowedip(peer, allowedip);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (attrs[WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL]) {
|
|
const u16 persistent_keepalive_interval = nla_get_u16(
|
|
attrs[WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL]);
|
|
const bool send_keepalive =
|
|
!peer->persistent_keepalive_interval &&
|
|
persistent_keepalive_interval &&
|
|
netif_running(wg->dev);
|
|
|
|
peer->persistent_keepalive_interval = persistent_keepalive_interval;
|
|
if (send_keepalive)
|
|
wg_packet_send_keepalive(peer);
|
|
}
|
|
|
|
if (netif_running(wg->dev))
|
|
wg_packet_send_staged_packets(peer);
|
|
|
|
out:
|
|
wg_peer_put(peer);
|
|
if (attrs[WGPEER_A_PRESHARED_KEY])
|
|
memzero_explicit(nla_data(attrs[WGPEER_A_PRESHARED_KEY]),
|
|
nla_len(attrs[WGPEER_A_PRESHARED_KEY]));
|
|
return ret;
|
|
}
|
|
|
|
static int wg_set_device(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct wg_device *wg = lookup_interface(info->attrs, skb);
|
|
u32 flags = 0;
|
|
int ret;
|
|
|
|
if (IS_ERR(wg)) {
|
|
ret = PTR_ERR(wg);
|
|
goto out_nodev;
|
|
}
|
|
|
|
rtnl_lock();
|
|
mutex_lock(&wg->device_update_lock);
|
|
|
|
if (info->attrs[WGDEVICE_A_FLAGS])
|
|
flags = nla_get_u32(info->attrs[WGDEVICE_A_FLAGS]);
|
|
ret = -EOPNOTSUPP;
|
|
if (flags & ~__WGDEVICE_F_ALL)
|
|
goto out;
|
|
|
|
ret = -EPERM;
|
|
if ((info->attrs[WGDEVICE_A_LISTEN_PORT] ||
|
|
info->attrs[WGDEVICE_A_FWMARK]) &&
|
|
!ns_capable(wg->creating_net->user_ns, CAP_NET_ADMIN))
|
|
goto out;
|
|
|
|
++wg->device_update_gen;
|
|
|
|
if (info->attrs[WGDEVICE_A_FWMARK]) {
|
|
struct wg_peer *peer;
|
|
|
|
wg->fwmark = nla_get_u32(info->attrs[WGDEVICE_A_FWMARK]);
|
|
list_for_each_entry(peer, &wg->peer_list, peer_list)
|
|
wg_socket_clear_peer_endpoint_src(peer);
|
|
}
|
|
|
|
if (info->attrs[WGDEVICE_A_LISTEN_PORT]) {
|
|
ret = set_port(wg,
|
|
nla_get_u16(info->attrs[WGDEVICE_A_LISTEN_PORT]));
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
if (flags & WGDEVICE_F_REPLACE_PEERS)
|
|
wg_peer_remove_all(wg);
|
|
|
|
if (info->attrs[WGDEVICE_A_PRIVATE_KEY] &&
|
|
nla_len(info->attrs[WGDEVICE_A_PRIVATE_KEY]) ==
|
|
NOISE_PUBLIC_KEY_LEN) {
|
|
u8 *private_key = nla_data(info->attrs[WGDEVICE_A_PRIVATE_KEY]);
|
|
u8 public_key[NOISE_PUBLIC_KEY_LEN];
|
|
struct wg_peer *peer, *temp;
|
|
|
|
if (!crypto_memneq(wg->static_identity.static_private,
|
|
private_key, NOISE_PUBLIC_KEY_LEN))
|
|
goto skip_set_private_key;
|
|
|
|
/* We remove before setting, to prevent race, which means doing
|
|
* two 25519-genpub ops.
|
|
*/
|
|
if (curve25519_generate_public(public_key, private_key)) {
|
|
peer = wg_pubkey_hashtable_lookup(wg->peer_hashtable,
|
|
public_key);
|
|
if (peer) {
|
|
wg_peer_put(peer);
|
|
wg_peer_remove(peer);
|
|
}
|
|
}
|
|
|
|
down_write(&wg->static_identity.lock);
|
|
wg_noise_set_static_identity_private_key(&wg->static_identity,
|
|
private_key);
|
|
list_for_each_entry_safe(peer, temp, &wg->peer_list,
|
|
peer_list) {
|
|
wg_noise_precompute_static_static(peer);
|
|
wg_noise_expire_current_peer_keypairs(peer);
|
|
}
|
|
wg_cookie_checker_precompute_device_keys(&wg->cookie_checker);
|
|
up_write(&wg->static_identity.lock);
|
|
}
|
|
skip_set_private_key:
|
|
|
|
if (info->attrs[WGDEVICE_A_PEERS]) {
|
|
struct nlattr *attr, *peer[WGPEER_A_MAX + 1];
|
|
int rem;
|
|
|
|
nla_for_each_nested(attr, info->attrs[WGDEVICE_A_PEERS], rem) {
|
|
ret = nla_parse_nested(peer, WGPEER_A_MAX, attr,
|
|
peer_policy, NULL);
|
|
if (ret < 0)
|
|
goto out;
|
|
ret = set_peer(wg, peer);
|
|
if (ret < 0)
|
|
goto out;
|
|
}
|
|
}
|
|
ret = 0;
|
|
|
|
out:
|
|
mutex_unlock(&wg->device_update_lock);
|
|
rtnl_unlock();
|
|
dev_put(wg->dev);
|
|
out_nodev:
|
|
if (info->attrs[WGDEVICE_A_PRIVATE_KEY])
|
|
memzero_explicit(nla_data(info->attrs[WGDEVICE_A_PRIVATE_KEY]),
|
|
nla_len(info->attrs[WGDEVICE_A_PRIVATE_KEY]));
|
|
return ret;
|
|
}
|
|
|
|
static const struct genl_ops genl_ops[] = {
|
|
{
|
|
.cmd = WG_CMD_GET_DEVICE,
|
|
.start = wg_get_device_start,
|
|
.dumpit = wg_get_device_dump,
|
|
.done = wg_get_device_done,
|
|
.flags = GENL_UNS_ADMIN_PERM
|
|
}, {
|
|
.cmd = WG_CMD_SET_DEVICE,
|
|
.doit = wg_set_device,
|
|
.flags = GENL_UNS_ADMIN_PERM
|
|
}
|
|
};
|
|
|
|
static struct genl_family genl_family __ro_after_init = {
|
|
.ops = genl_ops,
|
|
.n_ops = ARRAY_SIZE(genl_ops),
|
|
.name = WG_GENL_NAME,
|
|
.version = WG_GENL_VERSION,
|
|
.maxattr = WGDEVICE_A_MAX,
|
|
.module = THIS_MODULE,
|
|
.policy = device_policy,
|
|
.netnsok = true
|
|
};
|
|
|
|
int __init wg_genetlink_init(void)
|
|
{
|
|
return genl_register_family(&genl_family);
|
|
}
|
|
|
|
void __exit wg_genetlink_uninit(void)
|
|
{
|
|
genl_unregister_family(&genl_family);
|
|
}
|