ipc: split into separate files per-platform
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
parent
c45d422a93
commit
197995d50c
519
src/ipc-linux.h
Normal file
519
src/ipc-linux.h
Normal file
@ -0,0 +1,519 @@
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// SPDX-License-Identifier: MIT
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/*
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* Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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*/
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <time.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <linux/genetlink.h>
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#include <linux/if_link.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/wireguard.h>
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#include <netinet/in.h>
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#include "containers.h"
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#include "encoding.h"
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#include "netlink.h"
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#define IPC_SUPPORTS_KERNEL_INTERFACE
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#define SOCKET_BUFFER_SIZE (mnl_ideal_socket_buffer_size())
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struct interface {
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const char *name;
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bool is_wireguard;
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};
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static int parse_linkinfo(const struct nlattr *attr, void *data)
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{
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struct interface *interface = data;
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if (mnl_attr_get_type(attr) == IFLA_INFO_KIND && !strcmp(WG_GENL_NAME, mnl_attr_get_str(attr)))
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interface->is_wireguard = true;
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return MNL_CB_OK;
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}
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static int parse_infomsg(const struct nlattr *attr, void *data)
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{
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struct interface *interface = data;
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if (mnl_attr_get_type(attr) == IFLA_LINKINFO)
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return mnl_attr_parse_nested(attr, parse_linkinfo, data);
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else if (mnl_attr_get_type(attr) == IFLA_IFNAME)
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interface->name = mnl_attr_get_str(attr);
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return MNL_CB_OK;
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}
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static int read_devices_cb(const struct nlmsghdr *nlh, void *data)
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{
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struct string_list *list = data;
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struct interface interface = { 0 };
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int ret;
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ret = mnl_attr_parse(nlh, sizeof(struct ifinfomsg), parse_infomsg, &interface);
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if (ret != MNL_CB_OK)
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return ret;
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if (interface.name && interface.is_wireguard)
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ret = string_list_add(list, interface.name);
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if (ret < 0)
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return ret;
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if (nlh->nlmsg_type != NLMSG_DONE)
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return MNL_CB_OK + 1;
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return MNL_CB_OK;
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}
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static int kernel_get_wireguard_interfaces(struct string_list *list)
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{
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struct mnl_socket *nl = NULL;
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char *rtnl_buffer = NULL;
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size_t message_len;
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unsigned int portid, seq;
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ssize_t len;
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int ret = 0;
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struct nlmsghdr *nlh;
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struct ifinfomsg *ifm;
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ret = -ENOMEM;
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rtnl_buffer = calloc(SOCKET_BUFFER_SIZE, 1);
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if (!rtnl_buffer)
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goto cleanup;
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nl = mnl_socket_open(NETLINK_ROUTE);
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if (!nl) {
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ret = -errno;
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goto cleanup;
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}
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if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
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ret = -errno;
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goto cleanup;
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}
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seq = time(NULL);
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portid = mnl_socket_get_portid(nl);
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nlh = mnl_nlmsg_put_header(rtnl_buffer);
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nlh->nlmsg_type = RTM_GETLINK;
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nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP;
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nlh->nlmsg_seq = seq;
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ifm = mnl_nlmsg_put_extra_header(nlh, sizeof(*ifm));
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ifm->ifi_family = AF_UNSPEC;
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message_len = nlh->nlmsg_len;
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if (mnl_socket_sendto(nl, rtnl_buffer, message_len) < 0) {
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ret = -errno;
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goto cleanup;
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}
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another:
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if ((len = mnl_socket_recvfrom(nl, rtnl_buffer, SOCKET_BUFFER_SIZE)) < 0) {
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ret = -errno;
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goto cleanup;
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}
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if ((len = mnl_cb_run(rtnl_buffer, len, seq, portid, read_devices_cb, list)) < 0) {
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/* Netlink returns NLM_F_DUMP_INTR if the set of all tunnels changed
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* during the dump. That's unfortunate, but is pretty common on busy
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* systems that are adding and removing tunnels all the time. Rather
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* than retrying, potentially indefinitely, we just work with the
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* partial results. */
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if (errno != EINTR) {
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ret = -errno;
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goto cleanup;
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}
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}
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if (len == MNL_CB_OK + 1)
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goto another;
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ret = 0;
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cleanup:
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free(rtnl_buffer);
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if (nl)
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mnl_socket_close(nl);
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return ret;
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}
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static int kernel_set_device(struct wgdevice *dev)
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{
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int ret = 0;
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struct wgpeer *peer = NULL;
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struct wgallowedip *allowedip = NULL;
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struct nlattr *peers_nest, *peer_nest, *allowedips_nest, *allowedip_nest;
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struct nlmsghdr *nlh;
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struct mnlg_socket *nlg;
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nlg = mnlg_socket_open(WG_GENL_NAME, WG_GENL_VERSION);
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if (!nlg)
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return -errno;
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again:
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nlh = mnlg_msg_prepare(nlg, WG_CMD_SET_DEVICE, NLM_F_REQUEST | NLM_F_ACK);
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mnl_attr_put_strz(nlh, WGDEVICE_A_IFNAME, dev->name);
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if (!peer) {
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uint32_t flags = 0;
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if (dev->flags & WGDEVICE_HAS_PRIVATE_KEY)
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mnl_attr_put(nlh, WGDEVICE_A_PRIVATE_KEY, sizeof(dev->private_key), dev->private_key);
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if (dev->flags & WGDEVICE_HAS_LISTEN_PORT)
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mnl_attr_put_u16(nlh, WGDEVICE_A_LISTEN_PORT, dev->listen_port);
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if (dev->flags & WGDEVICE_HAS_FWMARK)
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mnl_attr_put_u32(nlh, WGDEVICE_A_FWMARK, dev->fwmark);
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if (dev->flags & WGDEVICE_REPLACE_PEERS)
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flags |= WGDEVICE_F_REPLACE_PEERS;
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if (flags)
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mnl_attr_put_u32(nlh, WGDEVICE_A_FLAGS, flags);
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}
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if (!dev->first_peer)
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goto send;
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peers_nest = peer_nest = allowedips_nest = allowedip_nest = NULL;
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peers_nest = mnl_attr_nest_start(nlh, WGDEVICE_A_PEERS);
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for (peer = peer ? peer : dev->first_peer; peer; peer = peer->next_peer) {
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uint32_t flags = 0;
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peer_nest = mnl_attr_nest_start_check(nlh, SOCKET_BUFFER_SIZE, 0);
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if (!peer_nest)
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goto toobig_peers;
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if (!mnl_attr_put_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_PUBLIC_KEY, sizeof(peer->public_key), peer->public_key))
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goto toobig_peers;
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if (peer->flags & WGPEER_REMOVE_ME)
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flags |= WGPEER_F_REMOVE_ME;
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if (!allowedip) {
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if (peer->flags & WGPEER_REPLACE_ALLOWEDIPS)
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flags |= WGPEER_F_REPLACE_ALLOWEDIPS;
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if (peer->flags & WGPEER_HAS_PRESHARED_KEY) {
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if (!mnl_attr_put_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_PRESHARED_KEY, sizeof(peer->preshared_key), peer->preshared_key))
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goto toobig_peers;
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}
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if (peer->endpoint.addr.sa_family == AF_INET) {
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if (!mnl_attr_put_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_ENDPOINT, sizeof(peer->endpoint.addr4), &peer->endpoint.addr4))
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goto toobig_peers;
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} else if (peer->endpoint.addr.sa_family == AF_INET6) {
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if (!mnl_attr_put_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_ENDPOINT, sizeof(peer->endpoint.addr6), &peer->endpoint.addr6))
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goto toobig_peers;
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}
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if (peer->flags & WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL) {
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if (!mnl_attr_put_u16_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL, peer->persistent_keepalive_interval))
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goto toobig_peers;
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}
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}
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if (flags) {
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if (!mnl_attr_put_u32_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_FLAGS, flags))
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goto toobig_peers;
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}
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if (peer->first_allowedip) {
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if (!allowedip)
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allowedip = peer->first_allowedip;
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allowedips_nest = mnl_attr_nest_start_check(nlh, SOCKET_BUFFER_SIZE, WGPEER_A_ALLOWEDIPS);
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if (!allowedips_nest)
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goto toobig_allowedips;
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for (; allowedip; allowedip = allowedip->next_allowedip) {
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allowedip_nest = mnl_attr_nest_start_check(nlh, SOCKET_BUFFER_SIZE, 0);
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if (!allowedip_nest)
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goto toobig_allowedips;
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if (!mnl_attr_put_u16_check(nlh, SOCKET_BUFFER_SIZE, WGALLOWEDIP_A_FAMILY, allowedip->family))
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goto toobig_allowedips;
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if (allowedip->family == AF_INET) {
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if (!mnl_attr_put_check(nlh, SOCKET_BUFFER_SIZE, WGALLOWEDIP_A_IPADDR, sizeof(allowedip->ip4), &allowedip->ip4))
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goto toobig_allowedips;
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} else if (allowedip->family == AF_INET6) {
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if (!mnl_attr_put_check(nlh, SOCKET_BUFFER_SIZE, WGALLOWEDIP_A_IPADDR, sizeof(allowedip->ip6), &allowedip->ip6))
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goto toobig_allowedips;
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}
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if (!mnl_attr_put_u8_check(nlh, SOCKET_BUFFER_SIZE, WGALLOWEDIP_A_CIDR_MASK, allowedip->cidr))
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goto toobig_allowedips;
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mnl_attr_nest_end(nlh, allowedip_nest);
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allowedip_nest = NULL;
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}
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mnl_attr_nest_end(nlh, allowedips_nest);
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allowedips_nest = NULL;
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}
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mnl_attr_nest_end(nlh, peer_nest);
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peer_nest = NULL;
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}
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mnl_attr_nest_end(nlh, peers_nest);
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peers_nest = NULL;
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goto send;
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toobig_allowedips:
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if (allowedip_nest)
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mnl_attr_nest_cancel(nlh, allowedip_nest);
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if (allowedips_nest)
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mnl_attr_nest_end(nlh, allowedips_nest);
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mnl_attr_nest_end(nlh, peer_nest);
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mnl_attr_nest_end(nlh, peers_nest);
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goto send;
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toobig_peers:
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if (peer_nest)
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mnl_attr_nest_cancel(nlh, peer_nest);
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mnl_attr_nest_end(nlh, peers_nest);
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goto send;
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send:
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if (mnlg_socket_send(nlg, nlh) < 0) {
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ret = -errno;
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goto out;
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}
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errno = 0;
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if (mnlg_socket_recv_run(nlg, NULL, NULL) < 0) {
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ret = errno ? -errno : -EINVAL;
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goto out;
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}
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if (peer)
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goto again;
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out:
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mnlg_socket_close(nlg);
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errno = -ret;
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return ret;
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}
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static int parse_allowedip(const struct nlattr *attr, void *data)
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{
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struct wgallowedip *allowedip = data;
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switch (mnl_attr_get_type(attr)) {
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case WGALLOWEDIP_A_UNSPEC:
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break;
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case WGALLOWEDIP_A_FAMILY:
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if (!mnl_attr_validate(attr, MNL_TYPE_U16))
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allowedip->family = mnl_attr_get_u16(attr);
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break;
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case WGALLOWEDIP_A_IPADDR:
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if (mnl_attr_get_payload_len(attr) == sizeof(allowedip->ip4))
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memcpy(&allowedip->ip4, mnl_attr_get_payload(attr), sizeof(allowedip->ip4));
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else if (mnl_attr_get_payload_len(attr) == sizeof(allowedip->ip6))
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memcpy(&allowedip->ip6, mnl_attr_get_payload(attr), sizeof(allowedip->ip6));
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break;
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case WGALLOWEDIP_A_CIDR_MASK:
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if (!mnl_attr_validate(attr, MNL_TYPE_U8))
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allowedip->cidr = mnl_attr_get_u8(attr);
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break;
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||||||
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}
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||||||
|
|
||||||
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return MNL_CB_OK;
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||||||
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}
|
||||||
|
|
||||||
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static int parse_allowedips(const struct nlattr *attr, void *data)
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{
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struct wgpeer *peer = data;
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struct wgallowedip *new_allowedip = calloc(1, sizeof(*new_allowedip));
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int ret;
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|
|
||||||
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if (!new_allowedip) {
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perror("calloc");
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return MNL_CB_ERROR;
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}
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||||||
|
if (!peer->first_allowedip)
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peer->first_allowedip = peer->last_allowedip = new_allowedip;
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else {
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peer->last_allowedip->next_allowedip = new_allowedip;
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peer->last_allowedip = new_allowedip;
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}
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ret = mnl_attr_parse_nested(attr, parse_allowedip, new_allowedip);
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|
if (!ret)
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return ret;
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||||||
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if (!((new_allowedip->family == AF_INET && new_allowedip->cidr <= 32) || (new_allowedip->family == AF_INET6 && new_allowedip->cidr <= 128)))
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||||||
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return MNL_CB_ERROR;
|
||||||
|
return MNL_CB_OK;
|
||||||
|
}
|
||||||
|
|
||||||
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static int parse_peer(const struct nlattr *attr, void *data)
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{
|
||||||
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struct wgpeer *peer = data;
|
||||||
|
|
||||||
|
switch (mnl_attr_get_type(attr)) {
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||||||
|
case WGPEER_A_UNSPEC:
|
||||||
|
break;
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||||||
|
case WGPEER_A_PUBLIC_KEY:
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||||||
|
if (mnl_attr_get_payload_len(attr) == sizeof(peer->public_key)) {
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||||||
|
memcpy(peer->public_key, mnl_attr_get_payload(attr), sizeof(peer->public_key));
|
||||||
|
peer->flags |= WGPEER_HAS_PUBLIC_KEY;
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||||||
|
}
|
||||||
|
break;
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||||||
|
case WGPEER_A_PRESHARED_KEY:
|
||||||
|
if (mnl_attr_get_payload_len(attr) == sizeof(peer->preshared_key)) {
|
||||||
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memcpy(peer->preshared_key, mnl_attr_get_payload(attr), sizeof(peer->preshared_key));
|
||||||
|
if (!key_is_zero(peer->preshared_key))
|
||||||
|
peer->flags |= WGPEER_HAS_PRESHARED_KEY;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case WGPEER_A_ENDPOINT: {
|
||||||
|
struct sockaddr *addr;
|
||||||
|
|
||||||
|
if (mnl_attr_get_payload_len(attr) < sizeof(*addr))
|
||||||
|
break;
|
||||||
|
addr = mnl_attr_get_payload(attr);
|
||||||
|
if (addr->sa_family == AF_INET && mnl_attr_get_payload_len(attr) == sizeof(peer->endpoint.addr4))
|
||||||
|
memcpy(&peer->endpoint.addr4, addr, sizeof(peer->endpoint.addr4));
|
||||||
|
else if (addr->sa_family == AF_INET6 && mnl_attr_get_payload_len(attr) == sizeof(peer->endpoint.addr6))
|
||||||
|
memcpy(&peer->endpoint.addr6, addr, sizeof(peer->endpoint.addr6));
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_U16))
|
||||||
|
peer->persistent_keepalive_interval = mnl_attr_get_u16(attr);
|
||||||
|
break;
|
||||||
|
case WGPEER_A_LAST_HANDSHAKE_TIME:
|
||||||
|
if (mnl_attr_get_payload_len(attr) == sizeof(peer->last_handshake_time))
|
||||||
|
memcpy(&peer->last_handshake_time, mnl_attr_get_payload(attr), sizeof(peer->last_handshake_time));
|
||||||
|
break;
|
||||||
|
case WGPEER_A_RX_BYTES:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_U64))
|
||||||
|
peer->rx_bytes = mnl_attr_get_u64(attr);
|
||||||
|
break;
|
||||||
|
case WGPEER_A_TX_BYTES:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_U64))
|
||||||
|
peer->tx_bytes = mnl_attr_get_u64(attr);
|
||||||
|
break;
|
||||||
|
case WGPEER_A_ALLOWEDIPS:
|
||||||
|
return mnl_attr_parse_nested(attr, parse_allowedips, peer);
|
||||||
|
}
|
||||||
|
|
||||||
|
return MNL_CB_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_peers(const struct nlattr *attr, void *data)
|
||||||
|
{
|
||||||
|
struct wgdevice *device = data;
|
||||||
|
struct wgpeer *new_peer = calloc(1, sizeof(*new_peer));
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (!new_peer) {
|
||||||
|
perror("calloc");
|
||||||
|
return MNL_CB_ERROR;
|
||||||
|
}
|
||||||
|
if (!device->first_peer)
|
||||||
|
device->first_peer = device->last_peer = new_peer;
|
||||||
|
else {
|
||||||
|
device->last_peer->next_peer = new_peer;
|
||||||
|
device->last_peer = new_peer;
|
||||||
|
}
|
||||||
|
ret = mnl_attr_parse_nested(attr, parse_peer, new_peer);
|
||||||
|
if (!ret)
|
||||||
|
return ret;
|
||||||
|
if (!(new_peer->flags & WGPEER_HAS_PUBLIC_KEY))
|
||||||
|
return MNL_CB_ERROR;
|
||||||
|
return MNL_CB_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int parse_device(const struct nlattr *attr, void *data)
|
||||||
|
{
|
||||||
|
struct wgdevice *device = data;
|
||||||
|
|
||||||
|
switch (mnl_attr_get_type(attr)) {
|
||||||
|
case WGDEVICE_A_UNSPEC:
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_IFINDEX:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_U32))
|
||||||
|
device->ifindex = mnl_attr_get_u32(attr);
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_IFNAME:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_STRING)) {
|
||||||
|
strncpy(device->name, mnl_attr_get_str(attr), sizeof(device->name) - 1);
|
||||||
|
device->name[sizeof(device->name) - 1] = '\0';
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_PRIVATE_KEY:
|
||||||
|
if (mnl_attr_get_payload_len(attr) == sizeof(device->private_key)) {
|
||||||
|
memcpy(device->private_key, mnl_attr_get_payload(attr), sizeof(device->private_key));
|
||||||
|
device->flags |= WGDEVICE_HAS_PRIVATE_KEY;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_PUBLIC_KEY:
|
||||||
|
if (mnl_attr_get_payload_len(attr) == sizeof(device->public_key)) {
|
||||||
|
memcpy(device->public_key, mnl_attr_get_payload(attr), sizeof(device->public_key));
|
||||||
|
device->flags |= WGDEVICE_HAS_PUBLIC_KEY;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_LISTEN_PORT:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_U16))
|
||||||
|
device->listen_port = mnl_attr_get_u16(attr);
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_FWMARK:
|
||||||
|
if (!mnl_attr_validate(attr, MNL_TYPE_U32))
|
||||||
|
device->fwmark = mnl_attr_get_u32(attr);
|
||||||
|
break;
|
||||||
|
case WGDEVICE_A_PEERS:
|
||||||
|
return mnl_attr_parse_nested(attr, parse_peers, device);
|
||||||
|
}
|
||||||
|
|
||||||
|
return MNL_CB_OK;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int read_device_cb(const struct nlmsghdr *nlh, void *data)
|
||||||
|
{
|
||||||
|
return mnl_attr_parse(nlh, sizeof(struct genlmsghdr), parse_device, data);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void coalesce_peers(struct wgdevice *device)
|
||||||
|
{
|
||||||
|
struct wgpeer *old_next_peer, *peer = device->first_peer;
|
||||||
|
|
||||||
|
while (peer && peer->next_peer) {
|
||||||
|
if (memcmp(peer->public_key, peer->next_peer->public_key, sizeof(peer->public_key))) {
|
||||||
|
peer = peer->next_peer;
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
if (!peer->first_allowedip) {
|
||||||
|
peer->first_allowedip = peer->next_peer->first_allowedip;
|
||||||
|
peer->last_allowedip = peer->next_peer->last_allowedip;
|
||||||
|
} else {
|
||||||
|
peer->last_allowedip->next_allowedip = peer->next_peer->first_allowedip;
|
||||||
|
peer->last_allowedip = peer->next_peer->last_allowedip;
|
||||||
|
}
|
||||||
|
old_next_peer = peer->next_peer;
|
||||||
|
peer->next_peer = old_next_peer->next_peer;
|
||||||
|
free(old_next_peer);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
static int kernel_get_device(struct wgdevice **device, const char *iface)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
struct nlmsghdr *nlh;
|
||||||
|
struct mnlg_socket *nlg;
|
||||||
|
|
||||||
|
try_again:
|
||||||
|
ret = 0;
|
||||||
|
*device = calloc(1, sizeof(**device));
|
||||||
|
if (!*device)
|
||||||
|
return -errno;
|
||||||
|
|
||||||
|
nlg = mnlg_socket_open(WG_GENL_NAME, WG_GENL_VERSION);
|
||||||
|
if (!nlg) {
|
||||||
|
free_wgdevice(*device);
|
||||||
|
*device = NULL;
|
||||||
|
return -errno;
|
||||||
|
}
|
||||||
|
|
||||||
|
nlh = mnlg_msg_prepare(nlg, WG_CMD_GET_DEVICE, NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP);
|
||||||
|
mnl_attr_put_strz(nlh, WGDEVICE_A_IFNAME, iface);
|
||||||
|
if (mnlg_socket_send(nlg, nlh) < 0) {
|
||||||
|
ret = -errno;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
errno = 0;
|
||||||
|
if (mnlg_socket_recv_run(nlg, read_device_cb, *device) < 0) {
|
||||||
|
ret = errno ? -errno : -EINVAL;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
coalesce_peers(*device);
|
||||||
|
|
||||||
|
out:
|
||||||
|
if (nlg)
|
||||||
|
mnlg_socket_close(nlg);
|
||||||
|
if (ret) {
|
||||||
|
free_wgdevice(*device);
|
||||||
|
if (ret == -EINTR)
|
||||||
|
goto try_again;
|
||||||
|
*device = NULL;
|
||||||
|
}
|
||||||
|
errno = -ret;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
281
src/ipc-openbsd.h
Normal file
281
src/ipc-openbsd.h
Normal file
@ -0,0 +1,281 @@
|
|||||||
|
// SPDX-License-Identifier: MIT
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <errno.h>
|
||||||
|
#include <stddef.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <time.h>
|
||||||
|
#include <sys/ioctl.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
#include <sys/sockio.h>
|
||||||
|
#include <sys/types.h>
|
||||||
|
#include <net/if.h>
|
||||||
|
#include <net/if_wg.h>
|
||||||
|
#include <netinet/in.h>
|
||||||
|
#include "containers.h"
|
||||||
|
|
||||||
|
#define IPC_SUPPORTS_KERNEL_INTERFACE
|
||||||
|
|
||||||
|
static int get_dgram_socket(void)
|
||||||
|
{
|
||||||
|
static int sock = -1;
|
||||||
|
if (sock < 0)
|
||||||
|
sock = socket(AF_INET, SOCK_DGRAM, 0);
|
||||||
|
return sock;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int kernel_get_wireguard_interfaces(struct string_list *list)
|
||||||
|
{
|
||||||
|
struct ifgroupreq ifgr = { .ifgr_name = "wg" };
|
||||||
|
struct ifg_req *ifg;
|
||||||
|
int s = get_dgram_socket(), ret = 0;
|
||||||
|
|
||||||
|
if (s < 0)
|
||||||
|
return -errno;
|
||||||
|
|
||||||
|
if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) < 0)
|
||||||
|
return errno == ENOENT ? 0 : -errno;
|
||||||
|
|
||||||
|
ifgr.ifgr_groups = calloc(1, ifgr.ifgr_len);
|
||||||
|
if (!ifgr.ifgr_groups)
|
||||||
|
return -errno;
|
||||||
|
if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) < 0) {
|
||||||
|
ret = -errno;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
for (ifg = ifgr.ifgr_groups; ifg && ifgr.ifgr_len > 0; ++ifg) {
|
||||||
|
if ((ret = string_list_add(list, ifg->ifgrq_member)) < 0)
|
||||||
|
goto out;
|
||||||
|
ifgr.ifgr_len -= sizeof(struct ifg_req);
|
||||||
|
}
|
||||||
|
|
||||||
|
out:
|
||||||
|
free(ifgr.ifgr_groups);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int kernel_get_device(struct wgdevice **device, const char *iface)
|
||||||
|
{
|
||||||
|
struct wg_data_io wgdata = { .wgd_size = 0 };
|
||||||
|
struct wg_interface_io *wg_iface;
|
||||||
|
struct wg_peer_io *wg_peer;
|
||||||
|
struct wg_aip_io *wg_aip;
|
||||||
|
struct wgdevice *dev;
|
||||||
|
struct wgpeer *peer;
|
||||||
|
struct wgallowedip *aip;
|
||||||
|
int s = get_dgram_socket(), ret;
|
||||||
|
|
||||||
|
if (s < 0)
|
||||||
|
return -errno;
|
||||||
|
|
||||||
|
*device = NULL;
|
||||||
|
strlcpy(wgdata.wgd_name, iface, sizeof(wgdata.wgd_name));
|
||||||
|
for (size_t last_size = wgdata.wgd_size;; last_size = wgdata.wgd_size) {
|
||||||
|
if (ioctl(s, SIOCGWG, (caddr_t)&wgdata) < 0)
|
||||||
|
goto out;
|
||||||
|
if (last_size >= wgdata.wgd_size)
|
||||||
|
break;
|
||||||
|
wgdata.wgd_interface = realloc(wgdata.wgd_interface, wgdata.wgd_size);
|
||||||
|
if (!wgdata.wgd_interface)
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
wg_iface = wgdata.wgd_interface;
|
||||||
|
dev = calloc(1, sizeof(*dev));
|
||||||
|
if (!dev)
|
||||||
|
goto out;
|
||||||
|
strlcpy(dev->name, iface, sizeof(dev->name));
|
||||||
|
|
||||||
|
if (wg_iface->i_flags & WG_INTERFACE_HAS_RTABLE) {
|
||||||
|
dev->fwmark = wg_iface->i_rtable;
|
||||||
|
dev->flags |= WGDEVICE_HAS_FWMARK;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (wg_iface->i_flags & WG_INTERFACE_HAS_PORT) {
|
||||||
|
dev->listen_port = wg_iface->i_port;
|
||||||
|
dev->flags |= WGDEVICE_HAS_LISTEN_PORT;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (wg_iface->i_flags & WG_INTERFACE_HAS_PUBLIC) {
|
||||||
|
memcpy(dev->public_key, wg_iface->i_public, sizeof(dev->public_key));
|
||||||
|
dev->flags |= WGDEVICE_HAS_PUBLIC_KEY;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (wg_iface->i_flags & WG_INTERFACE_HAS_PRIVATE) {
|
||||||
|
memcpy(dev->private_key, wg_iface->i_private, sizeof(dev->private_key));
|
||||||
|
dev->flags |= WGDEVICE_HAS_PRIVATE_KEY;
|
||||||
|
}
|
||||||
|
|
||||||
|
wg_peer = &wg_iface->i_peers[0];
|
||||||
|
for (size_t i = 0; i < wg_iface->i_peers_count; ++i) {
|
||||||
|
peer = calloc(1, sizeof(*peer));
|
||||||
|
if (!peer)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
if (dev->first_peer == NULL)
|
||||||
|
dev->first_peer = peer;
|
||||||
|
else
|
||||||
|
dev->last_peer->next_peer = peer;
|
||||||
|
dev->last_peer = peer;
|
||||||
|
|
||||||
|
if (wg_peer->p_flags & WG_PEER_HAS_PUBLIC) {
|
||||||
|
memcpy(peer->public_key, wg_peer->p_public, sizeof(peer->public_key));
|
||||||
|
peer->flags |= WGPEER_HAS_PUBLIC_KEY;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (wg_peer->p_flags & WG_PEER_HAS_PSK) {
|
||||||
|
memcpy(peer->preshared_key, wg_peer->p_psk, sizeof(peer->preshared_key));
|
||||||
|
peer->flags |= WGPEER_HAS_PRESHARED_KEY;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (wg_peer->p_flags & WG_PEER_HAS_PKA) {
|
||||||
|
peer->persistent_keepalive_interval = wg_peer->p_pka;
|
||||||
|
peer->flags |= WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (wg_peer->p_flags & WG_PEER_HAS_ENDPOINT && wg_peer->p_sa.sa_len <= sizeof(peer->endpoint.addr))
|
||||||
|
memcpy(&peer->endpoint.addr, &wg_peer->p_sa, wg_peer->p_sa.sa_len);
|
||||||
|
|
||||||
|
peer->rx_bytes = wg_peer->p_rxbytes;
|
||||||
|
peer->tx_bytes = wg_peer->p_txbytes;
|
||||||
|
|
||||||
|
peer->last_handshake_time.tv_sec = wg_peer->p_last_handshake.tv_sec;
|
||||||
|
peer->last_handshake_time.tv_nsec = wg_peer->p_last_handshake.tv_nsec;
|
||||||
|
|
||||||
|
wg_aip = &wg_peer->p_aips[0];
|
||||||
|
for (size_t j = 0; j < wg_peer->p_aips_count; ++j) {
|
||||||
|
aip = calloc(1, sizeof(*aip));
|
||||||
|
if (!aip)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
if (peer->first_allowedip == NULL)
|
||||||
|
peer->first_allowedip = aip;
|
||||||
|
else
|
||||||
|
peer->last_allowedip->next_allowedip = aip;
|
||||||
|
peer->last_allowedip = aip;
|
||||||
|
|
||||||
|
aip->family = wg_aip->a_af;
|
||||||
|
if (wg_aip->a_af == AF_INET) {
|
||||||
|
memcpy(&aip->ip4, &wg_aip->a_ipv4, sizeof(aip->ip4));
|
||||||
|
aip->cidr = wg_aip->a_cidr;
|
||||||
|
} else if (wg_aip->a_af == AF_INET6) {
|
||||||
|
memcpy(&aip->ip6, &wg_aip->a_ipv6, sizeof(aip->ip6));
|
||||||
|
aip->cidr = wg_aip->a_cidr;
|
||||||
|
}
|
||||||
|
++wg_aip;
|
||||||
|
}
|
||||||
|
wg_peer = (struct wg_peer_io *)wg_aip;
|
||||||
|
}
|
||||||
|
*device = dev;
|
||||||
|
errno = 0;
|
||||||
|
out:
|
||||||
|
ret = -errno;
|
||||||
|
free(wgdata.wgd_interface);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int kernel_set_device(struct wgdevice *dev)
|
||||||
|
{
|
||||||
|
struct wg_data_io wgdata = { .wgd_size = sizeof(struct wg_interface_io) };
|
||||||
|
struct wg_interface_io *wg_iface;
|
||||||
|
struct wg_peer_io *wg_peer;
|
||||||
|
struct wg_aip_io *wg_aip;
|
||||||
|
struct wgpeer *peer;
|
||||||
|
struct wgallowedip *aip;
|
||||||
|
int s = get_dgram_socket(), ret;
|
||||||
|
size_t peer_count, aip_count;
|
||||||
|
|
||||||
|
if (s < 0)
|
||||||
|
return -errno;
|
||||||
|
|
||||||
|
for_each_wgpeer(dev, peer) {
|
||||||
|
wgdata.wgd_size += sizeof(struct wg_peer_io);
|
||||||
|
for_each_wgallowedip(peer, aip)
|
||||||
|
wgdata.wgd_size += sizeof(struct wg_aip_io);
|
||||||
|
}
|
||||||
|
wg_iface = wgdata.wgd_interface = calloc(1, wgdata.wgd_size);
|
||||||
|
if (!wgdata.wgd_interface)
|
||||||
|
return -errno;
|
||||||
|
strlcpy(wgdata.wgd_name, dev->name, sizeof(wgdata.wgd_name));
|
||||||
|
|
||||||
|
if (dev->flags & WGDEVICE_HAS_PRIVATE_KEY) {
|
||||||
|
memcpy(wg_iface->i_private, dev->private_key, sizeof(wg_iface->i_private));
|
||||||
|
wg_iface->i_flags |= WG_INTERFACE_HAS_PRIVATE;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (dev->flags & WGDEVICE_HAS_LISTEN_PORT) {
|
||||||
|
wg_iface->i_port = dev->listen_port;
|
||||||
|
wg_iface->i_flags |= WG_INTERFACE_HAS_PORT;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (dev->flags & WGDEVICE_HAS_FWMARK) {
|
||||||
|
wg_iface->i_rtable = dev->fwmark;
|
||||||
|
wg_iface->i_flags |= WG_INTERFACE_HAS_RTABLE;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (dev->flags & WGDEVICE_REPLACE_PEERS)
|
||||||
|
wg_iface->i_flags |= WG_INTERFACE_REPLACE_PEERS;
|
||||||
|
|
||||||
|
peer_count = 0;
|
||||||
|
wg_peer = &wg_iface->i_peers[0];
|
||||||
|
for_each_wgpeer(dev, peer) {
|
||||||
|
wg_peer->p_flags = WG_PEER_HAS_PUBLIC;
|
||||||
|
memcpy(wg_peer->p_public, peer->public_key, sizeof(wg_peer->p_public));
|
||||||
|
|
||||||
|
if (peer->flags & WGPEER_HAS_PRESHARED_KEY) {
|
||||||
|
memcpy(wg_peer->p_psk, peer->preshared_key, sizeof(wg_peer->p_psk));
|
||||||
|
wg_peer->p_flags |= WG_PEER_HAS_PSK;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (peer->flags & WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL) {
|
||||||
|
wg_peer->p_pka = peer->persistent_keepalive_interval;
|
||||||
|
wg_peer->p_flags |= WG_PEER_HAS_PKA;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ((peer->endpoint.addr.sa_family == AF_INET || peer->endpoint.addr.sa_family == AF_INET6) &&
|
||||||
|
peer->endpoint.addr.sa_len <= sizeof(wg_peer->p_endpoint)) {
|
||||||
|
memcpy(&wg_peer->p_endpoint, &peer->endpoint.addr, peer->endpoint.addr.sa_len);
|
||||||
|
wg_peer->p_flags |= WG_PEER_HAS_ENDPOINT;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (peer->flags & WGPEER_REPLACE_ALLOWEDIPS)
|
||||||
|
wg_peer->p_flags |= WG_PEER_REPLACE_AIPS;
|
||||||
|
|
||||||
|
if (peer->flags & WGPEER_REMOVE_ME)
|
||||||
|
wg_peer->p_flags |= WG_PEER_REMOVE;
|
||||||
|
|
||||||
|
aip_count = 0;
|
||||||
|
wg_aip = &wg_peer->p_aips[0];
|
||||||
|
for_each_wgallowedip(peer, aip) {
|
||||||
|
wg_aip->a_af = aip->family;
|
||||||
|
wg_aip->a_cidr = aip->cidr;
|
||||||
|
|
||||||
|
if (aip->family == AF_INET) {
|
||||||
|
memcpy(&wg_aip->a_ipv4, &aip->ip4, sizeof(wg_aip->a_ipv4));
|
||||||
|
} else if (aip->family == AF_INET6) {
|
||||||
|
memcpy(&wg_aip->a_ipv6, &aip->ip6, sizeof(wg_aip->a_ipv6));
|
||||||
|
} else {
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
++aip_count;
|
||||||
|
++wg_aip;
|
||||||
|
}
|
||||||
|
wg_peer->p_aips_count = aip_count;
|
||||||
|
++peer_count;
|
||||||
|
wg_peer = (struct wg_peer_io *)wg_aip;
|
||||||
|
}
|
||||||
|
wg_iface->i_peers_count = peer_count;
|
||||||
|
|
||||||
|
if (ioctl(s, SIOCSWG, (caddr_t)&wgdata) < 0)
|
||||||
|
goto out;
|
||||||
|
errno = 0;
|
||||||
|
|
||||||
|
out:
|
||||||
|
ret = -errno;
|
||||||
|
free(wgdata.wgd_interface);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
119
src/ipc-uapi-unix.h
Normal file
119
src/ipc-uapi-unix.h
Normal file
@ -0,0 +1,119 @@
|
|||||||
|
// SPDX-License-Identifier: MIT
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdbool.h>
|
||||||
|
#include <stddef.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <dirent.h>
|
||||||
|
#include <errno.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
#include <sys/stat.h>
|
||||||
|
#include <sys/un.h>
|
||||||
|
|
||||||
|
#define SOCK_PATH RUNSTATEDIR "/wireguard/"
|
||||||
|
#define SOCK_SUFFIX ".sock"
|
||||||
|
|
||||||
|
static FILE *userspace_interface_file(const char *iface)
|
||||||
|
{
|
||||||
|
struct stat sbuf;
|
||||||
|
struct sockaddr_un addr = { .sun_family = AF_UNIX };
|
||||||
|
int fd = -1, ret;
|
||||||
|
FILE *f = NULL;
|
||||||
|
|
||||||
|
errno = EINVAL;
|
||||||
|
if (strchr(iface, '/'))
|
||||||
|
goto out;
|
||||||
|
ret = snprintf(addr.sun_path, sizeof(addr.sun_path), SOCK_PATH "%s" SOCK_SUFFIX, iface);
|
||||||
|
if (ret < 0)
|
||||||
|
goto out;
|
||||||
|
ret = stat(addr.sun_path, &sbuf);
|
||||||
|
if (ret < 0)
|
||||||
|
goto out;
|
||||||
|
errno = EBADF;
|
||||||
|
if (!S_ISSOCK(sbuf.st_mode))
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
ret = fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
||||||
|
if (ret < 0)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
ret = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
|
||||||
|
if (ret < 0) {
|
||||||
|
if (errno == ECONNREFUSED) /* If the process is gone, we try to clean up the socket. */
|
||||||
|
unlink(addr.sun_path);
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
f = fdopen(fd, "r+");
|
||||||
|
if (f)
|
||||||
|
errno = 0;
|
||||||
|
out:
|
||||||
|
ret = -errno;
|
||||||
|
if (ret) {
|
||||||
|
if (fd >= 0)
|
||||||
|
close(fd);
|
||||||
|
errno = -ret;
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
return f;
|
||||||
|
}
|
||||||
|
|
||||||
|
static bool userspace_has_wireguard_interface(const char *iface)
|
||||||
|
{
|
||||||
|
struct stat sbuf;
|
||||||
|
struct sockaddr_un addr = { .sun_family = AF_UNIX };
|
||||||
|
int fd, ret;
|
||||||
|
|
||||||
|
if (strchr(iface, '/'))
|
||||||
|
return false;
|
||||||
|
if (snprintf(addr.sun_path, sizeof(addr.sun_path), SOCK_PATH "%s" SOCK_SUFFIX, iface) < 0)
|
||||||
|
return false;
|
||||||
|
if (stat(addr.sun_path, &sbuf) < 0)
|
||||||
|
return false;
|
||||||
|
if (!S_ISSOCK(sbuf.st_mode))
|
||||||
|
return false;
|
||||||
|
ret = fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
||||||
|
if (ret < 0)
|
||||||
|
return false;
|
||||||
|
ret = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
|
||||||
|
if (ret < 0 && errno == ECONNREFUSED) { /* If the process is gone, we try to clean up the socket. */
|
||||||
|
close(fd);
|
||||||
|
unlink(addr.sun_path);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
close(fd);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int userspace_get_wireguard_interfaces(struct string_list *list)
|
||||||
|
{
|
||||||
|
DIR *dir;
|
||||||
|
struct dirent *ent;
|
||||||
|
size_t len;
|
||||||
|
char *end;
|
||||||
|
int ret = 0;
|
||||||
|
|
||||||
|
dir = opendir(SOCK_PATH);
|
||||||
|
if (!dir)
|
||||||
|
return errno == ENOENT ? 0 : -errno;
|
||||||
|
while ((ent = readdir(dir))) {
|
||||||
|
len = strlen(ent->d_name);
|
||||||
|
if (len <= strlen(SOCK_SUFFIX))
|
||||||
|
continue;
|
||||||
|
end = &ent->d_name[len - strlen(SOCK_SUFFIX)];
|
||||||
|
if (strncmp(end, SOCK_SUFFIX, strlen(SOCK_SUFFIX)))
|
||||||
|
continue;
|
||||||
|
*end = '\0';
|
||||||
|
if (!userspace_has_wireguard_interface(ent->d_name))
|
||||||
|
continue;
|
||||||
|
ret = string_list_add(list, ent->d_name);
|
||||||
|
if (ret < 0)
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
out:
|
||||||
|
closedir(dir);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
272
src/ipc-uapi.h
Normal file
272
src/ipc-uapi.h
Normal file
@ -0,0 +1,272 @@
|
|||||||
|
// SPDX-License-Identifier: MIT
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <arpa/inet.h>
|
||||||
|
#include <ctype.h>
|
||||||
|
#include <errno.h>
|
||||||
|
#include <net/if.h>
|
||||||
|
#include <netdb.h>
|
||||||
|
#include <netinet/in.h>
|
||||||
|
#include <stddef.h>
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <sys/socket.h>
|
||||||
|
#include "containers.h"
|
||||||
|
#include "curve25519.h"
|
||||||
|
#include "encoding.h"
|
||||||
|
|
||||||
|
#ifdef _WIN32
|
||||||
|
#include "ipc-uapi-windows.h"
|
||||||
|
#else
|
||||||
|
#include "ipc-uapi-unix.h"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
static int userspace_set_device(struct wgdevice *dev)
|
||||||
|
{
|
||||||
|
char hex[WG_KEY_LEN_HEX], ip[INET6_ADDRSTRLEN], host[4096 + 1], service[512 + 1];
|
||||||
|
struct wgpeer *peer;
|
||||||
|
struct wgallowedip *allowedip;
|
||||||
|
FILE *f;
|
||||||
|
int ret;
|
||||||
|
socklen_t addr_len;
|
||||||
|
|
||||||
|
f = userspace_interface_file(dev->name);
|
||||||
|
if (!f)
|
||||||
|
return -errno;
|
||||||
|
fprintf(f, "set=1\n");
|
||||||
|
|
||||||
|
if (dev->flags & WGDEVICE_HAS_PRIVATE_KEY) {
|
||||||
|
key_to_hex(hex, dev->private_key);
|
||||||
|
fprintf(f, "private_key=%s\n", hex);
|
||||||
|
}
|
||||||
|
if (dev->flags & WGDEVICE_HAS_LISTEN_PORT)
|
||||||
|
fprintf(f, "listen_port=%u\n", dev->listen_port);
|
||||||
|
if (dev->flags & WGDEVICE_HAS_FWMARK)
|
||||||
|
fprintf(f, "fwmark=%u\n", dev->fwmark);
|
||||||
|
if (dev->flags & WGDEVICE_REPLACE_PEERS)
|
||||||
|
fprintf(f, "replace_peers=true\n");
|
||||||
|
|
||||||
|
for_each_wgpeer(dev, peer) {
|
||||||
|
key_to_hex(hex, peer->public_key);
|
||||||
|
fprintf(f, "public_key=%s\n", hex);
|
||||||
|
if (peer->flags & WGPEER_REMOVE_ME) {
|
||||||
|
fprintf(f, "remove=true\n");
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
if (peer->flags & WGPEER_HAS_PRESHARED_KEY) {
|
||||||
|
key_to_hex(hex, peer->preshared_key);
|
||||||
|
fprintf(f, "preshared_key=%s\n", hex);
|
||||||
|
}
|
||||||
|
if (peer->endpoint.addr.sa_family == AF_INET || peer->endpoint.addr.sa_family == AF_INET6) {
|
||||||
|
addr_len = 0;
|
||||||
|
if (peer->endpoint.addr.sa_family == AF_INET)
|
||||||
|
addr_len = sizeof(struct sockaddr_in);
|
||||||
|
else if (peer->endpoint.addr.sa_family == AF_INET6)
|
||||||
|
addr_len = sizeof(struct sockaddr_in6);
|
||||||
|
if (!getnameinfo(&peer->endpoint.addr, addr_len, host, sizeof(host), service, sizeof(service), NI_DGRAM | NI_NUMERICSERV | NI_NUMERICHOST)) {
|
||||||
|
if (peer->endpoint.addr.sa_family == AF_INET6 && strchr(host, ':'))
|
||||||
|
fprintf(f, "endpoint=[%s]:%s\n", host, service);
|
||||||
|
else
|
||||||
|
fprintf(f, "endpoint=%s:%s\n", host, service);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (peer->flags & WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL)
|
||||||
|
fprintf(f, "persistent_keepalive_interval=%u\n", peer->persistent_keepalive_interval);
|
||||||
|
if (peer->flags & WGPEER_REPLACE_ALLOWEDIPS)
|
||||||
|
fprintf(f, "replace_allowed_ips=true\n");
|
||||||
|
for_each_wgallowedip(peer, allowedip) {
|
||||||
|
if (allowedip->family == AF_INET) {
|
||||||
|
if (!inet_ntop(AF_INET, &allowedip->ip4, ip, INET6_ADDRSTRLEN))
|
||||||
|
continue;
|
||||||
|
} else if (allowedip->family == AF_INET6) {
|
||||||
|
if (!inet_ntop(AF_INET6, &allowedip->ip6, ip, INET6_ADDRSTRLEN))
|
||||||
|
continue;
|
||||||
|
} else
|
||||||
|
continue;
|
||||||
|
fprintf(f, "allowed_ip=%s/%d\n", ip, allowedip->cidr);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
fprintf(f, "\n");
|
||||||
|
fflush(f);
|
||||||
|
|
||||||
|
if (fscanf(f, "errno=%d\n\n", &ret) != 1)
|
||||||
|
ret = errno ? -errno : -EPROTO;
|
||||||
|
fclose(f);
|
||||||
|
errno = -ret;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define NUM(max) ({ \
|
||||||
|
unsigned long long num; \
|
||||||
|
char *end; \
|
||||||
|
if (!isdigit(value[0])) \
|
||||||
|
break; \
|
||||||
|
num = strtoull(value, &end, 10); \
|
||||||
|
if (*end || num > max) \
|
||||||
|
break; \
|
||||||
|
num; \
|
||||||
|
})
|
||||||
|
|
||||||
|
static int userspace_get_device(struct wgdevice **out, const char *iface)
|
||||||
|
{
|
||||||
|
struct wgdevice *dev;
|
||||||
|
struct wgpeer *peer = NULL;
|
||||||
|
struct wgallowedip *allowedip = NULL;
|
||||||
|
size_t line_buffer_len = 0, line_len;
|
||||||
|
char *key = NULL, *value;
|
||||||
|
FILE *f;
|
||||||
|
int ret = -EPROTO;
|
||||||
|
|
||||||
|
*out = dev = calloc(1, sizeof(*dev));
|
||||||
|
if (!dev)
|
||||||
|
return -errno;
|
||||||
|
|
||||||
|
f = userspace_interface_file(iface);
|
||||||
|
if (!f) {
|
||||||
|
ret = -errno;
|
||||||
|
free(dev);
|
||||||
|
*out = NULL;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
fprintf(f, "get=1\n\n");
|
||||||
|
fflush(f);
|
||||||
|
|
||||||
|
strncpy(dev->name, iface, IFNAMSIZ - 1);
|
||||||
|
dev->name[IFNAMSIZ - 1] = '\0';
|
||||||
|
|
||||||
|
while (getline(&key, &line_buffer_len, f) > 0) {
|
||||||
|
line_len = strlen(key);
|
||||||
|
if (line_len == 1 && key[0] == '\n')
|
||||||
|
goto err;
|
||||||
|
value = strchr(key, '=');
|
||||||
|
if (!value || line_len == 0 || key[line_len - 1] != '\n')
|
||||||
|
break;
|
||||||
|
*value++ = key[--line_len] = '\0';
|
||||||
|
|
||||||
|
if (!peer && !strcmp(key, "private_key")) {
|
||||||
|
if (!key_from_hex(dev->private_key, value))
|
||||||
|
break;
|
||||||
|
curve25519_generate_public(dev->public_key, dev->private_key);
|
||||||
|
dev->flags |= WGDEVICE_HAS_PRIVATE_KEY | WGDEVICE_HAS_PUBLIC_KEY;
|
||||||
|
} else if (!peer && !strcmp(key, "listen_port")) {
|
||||||
|
dev->listen_port = NUM(0xffffU);
|
||||||
|
dev->flags |= WGDEVICE_HAS_LISTEN_PORT;
|
||||||
|
} else if (!peer && !strcmp(key, "fwmark")) {
|
||||||
|
dev->fwmark = NUM(0xffffffffU);
|
||||||
|
dev->flags |= WGDEVICE_HAS_FWMARK;
|
||||||
|
} else if (!strcmp(key, "public_key")) {
|
||||||
|
struct wgpeer *new_peer = calloc(1, sizeof(*new_peer));
|
||||||
|
|
||||||
|
if (!new_peer) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto err;
|
||||||
|
}
|
||||||
|
allowedip = NULL;
|
||||||
|
if (peer)
|
||||||
|
peer->next_peer = new_peer;
|
||||||
|
else
|
||||||
|
dev->first_peer = new_peer;
|
||||||
|
peer = new_peer;
|
||||||
|
if (!key_from_hex(peer->public_key, value))
|
||||||
|
break;
|
||||||
|
peer->flags |= WGPEER_HAS_PUBLIC_KEY;
|
||||||
|
} else if (peer && !strcmp(key, "preshared_key")) {
|
||||||
|
if (!key_from_hex(peer->preshared_key, value))
|
||||||
|
break;
|
||||||
|
if (!key_is_zero(peer->preshared_key))
|
||||||
|
peer->flags |= WGPEER_HAS_PRESHARED_KEY;
|
||||||
|
} else if (peer && !strcmp(key, "endpoint")) {
|
||||||
|
char *begin, *end;
|
||||||
|
struct addrinfo *resolved;
|
||||||
|
struct addrinfo hints = {
|
||||||
|
.ai_family = AF_UNSPEC,
|
||||||
|
.ai_socktype = SOCK_DGRAM,
|
||||||
|
.ai_protocol = IPPROTO_UDP
|
||||||
|
};
|
||||||
|
if (!strlen(value))
|
||||||
|
break;
|
||||||
|
if (value[0] == '[') {
|
||||||
|
begin = &value[1];
|
||||||
|
end = strchr(value, ']');
|
||||||
|
if (!end)
|
||||||
|
break;
|
||||||
|
*end++ = '\0';
|
||||||
|
if (*end++ != ':' || !*end)
|
||||||
|
break;
|
||||||
|
} else {
|
||||||
|
begin = value;
|
||||||
|
end = strrchr(value, ':');
|
||||||
|
if (!end || !*(end + 1))
|
||||||
|
break;
|
||||||
|
*end++ = '\0';
|
||||||
|
}
|
||||||
|
if (getaddrinfo(begin, end, &hints, &resolved) != 0) {
|
||||||
|
ret = ENETUNREACH;
|
||||||
|
goto err;
|
||||||
|
}
|
||||||
|
if ((resolved->ai_family == AF_INET && resolved->ai_addrlen == sizeof(struct sockaddr_in)) ||
|
||||||
|
(resolved->ai_family == AF_INET6 && resolved->ai_addrlen == sizeof(struct sockaddr_in6)))
|
||||||
|
memcpy(&peer->endpoint.addr, resolved->ai_addr, resolved->ai_addrlen);
|
||||||
|
else {
|
||||||
|
freeaddrinfo(resolved);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
freeaddrinfo(resolved);
|
||||||
|
} else if (peer && !strcmp(key, "persistent_keepalive_interval")) {
|
||||||
|
peer->persistent_keepalive_interval = NUM(0xffffU);
|
||||||
|
peer->flags |= WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL;
|
||||||
|
} else if (peer && !strcmp(key, "allowed_ip")) {
|
||||||
|
struct wgallowedip *new_allowedip;
|
||||||
|
char *end, *mask = value, *ip = strsep(&mask, "/");
|
||||||
|
|
||||||
|
if (!mask || !isdigit(mask[0]))
|
||||||
|
break;
|
||||||
|
new_allowedip = calloc(1, sizeof(*new_allowedip));
|
||||||
|
if (!new_allowedip) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto err;
|
||||||
|
}
|
||||||
|
if (allowedip)
|
||||||
|
allowedip->next_allowedip = new_allowedip;
|
||||||
|
else
|
||||||
|
peer->first_allowedip = new_allowedip;
|
||||||
|
allowedip = new_allowedip;
|
||||||
|
allowedip->family = AF_UNSPEC;
|
||||||
|
if (strchr(ip, ':')) {
|
||||||
|
if (inet_pton(AF_INET6, ip, &allowedip->ip6) == 1)
|
||||||
|
allowedip->family = AF_INET6;
|
||||||
|
} else {
|
||||||
|
if (inet_pton(AF_INET, ip, &allowedip->ip4) == 1)
|
||||||
|
allowedip->family = AF_INET;
|
||||||
|
}
|
||||||
|
allowedip->cidr = strtoul(mask, &end, 10);
|
||||||
|
if (*end || allowedip->family == AF_UNSPEC || (allowedip->family == AF_INET6 && allowedip->cidr > 128) || (allowedip->family == AF_INET && allowedip->cidr > 32))
|
||||||
|
break;
|
||||||
|
} else if (peer && !strcmp(key, "last_handshake_time_sec"))
|
||||||
|
peer->last_handshake_time.tv_sec = NUM(0x7fffffffffffffffULL);
|
||||||
|
else if (peer && !strcmp(key, "last_handshake_time_nsec"))
|
||||||
|
peer->last_handshake_time.tv_nsec = NUM(0x7fffffffffffffffULL);
|
||||||
|
else if (peer && !strcmp(key, "rx_bytes"))
|
||||||
|
peer->rx_bytes = NUM(0xffffffffffffffffULL);
|
||||||
|
else if (peer && !strcmp(key, "tx_bytes"))
|
||||||
|
peer->tx_bytes = NUM(0xffffffffffffffffULL);
|
||||||
|
else if (!strcmp(key, "errno"))
|
||||||
|
ret = -NUM(0x7fffffffU);
|
||||||
|
}
|
||||||
|
ret = -EPROTO;
|
||||||
|
err:
|
||||||
|
free(key);
|
||||||
|
if (ret) {
|
||||||
|
free_wgdevice(dev);
|
||||||
|
*out = NULL;
|
||||||
|
}
|
||||||
|
fclose(f);
|
||||||
|
errno = -ret;
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
}
|
||||||
|
#undef NUM
|
||||||
Reference in New Issue
Block a user