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/* SPDX-License-Identifier: MIT */
/*
* Copyright (C) 2018 Wireguard LLC
*/
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include "wireguard.h"
#include "protocol.h"
#include "client.h"
bool is_server_in_allowed_ips(const char iface[])
{
unsigned __int128 server_addr;
unsigned __int128 subnet_mask;
unsigned __int128 allowed_ip6;
wg_device *device;
wg_allowedip *allowedip;
int ret;
inet_pton(AF_INET6, WG_DYNAMIC_SERVER_IP, &server_addr);
ret = wg_get_device(&device, iface);
if (ret < 0) {
wg_free_device(device);
return false;
}
wg_for_each_allowedip(device->first_peer, allowedip)
{
if (allowedip->family == AF_INET6) {
memset(&subnet_mask, 0xFF, sizeof(unsigned __int128));
memcpy(&allowed_ip6, &allowedip->ip6,
sizeof(unsigned __int128));
subnet_mask <<= allowedip->cidr;
server_addr &= subnet_mask;
allowed_ip6 &= subnet_mask;
if (server_addr == allowed_ip6) {
wg_free_device(device);
return true;
}
}
}
wg_free_device(device);
return false;
}
int connect_to_server()
{
int sock = -1;
int ret;
struct sockaddr_in6 addr;
sock = socket(AF_INET6, SOCK_STREAM, 0);
if (sock < 0) {
return -errno;
}
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(WG_DYNAMIC_SERVER_PORT);
inet_pton(AF_INET6, WG_DYNAMIC_SERVER_IP, &addr.sin6_addr);
ret = connect(sock, (struct sockaddr *)&addr, sizeof(addr));
if (ret < 0) {
return -errno;
}
return sock;
}
int close_connection(int sock)
{
int ret;
ret = close(sock);
if (ret < 0) {
return -errno;
}
return 0;
}
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