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/*
* Copyright (C) 2020-2021 Soleta Networks <info@soleta.eu>
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU Affero General Public License as published by the
* Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*/
#include <sys/types.h>
#include <ifaddrs.h>
#include <string.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <syslog.h>
#include <stddef.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include "wol.h"
#include "rest.h"
#include "cfg.h"
#include "ogAdmServer.h"
int wol_socket_open(void)
{
unsigned int on = 1;
int ret, s;
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (s < 0) {
syslog(LOG_ERR, "cannot create socket for magic packet\n");
return -1;
}
ret = setsockopt(s, SOL_SOCKET, SO_BROADCAST, (unsigned int *) &on,
sizeof(on));
if (ret < 0) {
syslog(LOG_ERR, "cannot set broadcast socket\n");
return -1;
}
return s;
}
static int wake_up_send(int sd, struct sockaddr_in *client,
const struct wol_msg *msg, const struct in_addr *addr)
{
int ret;
client->sin_addr.s_addr = addr->s_addr;
ret = sendto(sd, msg, sizeof(*msg), 0,
(struct sockaddr *)client, sizeof(*client));
if (ret < 0) {
syslog(LOG_ERR, "failed to send wol\n");
return -1;
}
return 0;
}
static int wake_up_broadcast(int sd, struct sockaddr_in *client,
const struct wol_msg *msg)
{
struct sockaddr_in *broadcast_addr, addr = {};
struct ifaddrs *ifaddr, *ifa;
if (getifaddrs(&ifaddr) < 0) {
syslog(LOG_ERR, "cannot get list of addresses\n");
return -1;
}
addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL ||
ifa->ifa_addr->sa_family != AF_INET ||
strcmp(ifa->ifa_name, ogconfig.wol.interface) != 0)
continue;
broadcast_addr =
(struct sockaddr_in *)ifa->ifa_ifu.ifu_broadaddr;
addr.sin_addr.s_addr = broadcast_addr->sin_addr.s_addr;
break;
}
freeifaddrs(ifaddr);
return wake_up_send(sd, client, msg, &addr.sin_addr);
}
enum wol_delivery_type {
OG_WOL_BROADCAST = 1,
OG_WOL_UNICAST = 2
};
int wake_up(int s, const struct in_addr *addr, const struct in_addr *netmask,
const char *mac, uint32_t wol_delivery_type)
{
uint32_t mac_addr_u32[OG_WOL_MACADDR_LEN];
uint8_t mac_addr[OG_WOL_MACADDR_LEN];
struct sockaddr_in dest = {
.sin_family = AF_INET,
.sin_port = htons(OG_WOL_PORT),
};
struct in_addr broadcast_addr;
struct wol_msg msg = {};
int ret, i;
memset(msg.wol_sequence_ff, 0xff, OG_WOL_SEQUENCE);
sscanf(mac, "%02x%02x%02x%02x%02x%02x",
&mac_addr_u32[0], &mac_addr_u32[1], &mac_addr_u32[2],
&mac_addr_u32[3], &mac_addr_u32[4], &mac_addr_u32[5]);
for (i = 0; i < OG_WOL_MACADDR_LEN; i++)
mac_addr[i] = mac_addr_u32[i];
for (i = 0; i < OG_WOL_REPEAT; i++)
memcpy(&msg.mac_addr[i][0], mac_addr, OG_WOL_MACADDR_LEN);
switch (wol_delivery_type) {
case OG_WOL_BROADCAST:
ret = wake_up_broadcast(s, &dest, &msg);
broadcast_addr.s_addr = addr->s_addr | ~netmask->s_addr;
ret |= wake_up_send(s, &dest, &msg, &broadcast_addr);
break;
case OG_WOL_UNICAST:
ret = wake_up_send(s, &dest, &msg, addr);
break;
default:
syslog(LOG_ERR, "unknown wol type\n");
ret = -1;
break;
}
return ret;
}
#define OG_WOL_CLIENT_TIMEOUT 60.
static void og_client_wol_timer_cb(struct ev_loop *loop, ev_timer *timer,
int events)
{
struct og_client_wol *cli_wol;
cli_wol = container_of(timer, struct og_client_wol, timer);
syslog(LOG_ERR, "timeout WakeOnLAN request for client %s\n",
inet_ntoa(cli_wol->addr));
og_client_wol_destroy(cli_wol);
}
struct og_client_wol *og_client_wol_create(const struct in_addr *addr)
{
struct og_client_wol *cli_wol;
cli_wol = calloc(1, sizeof(struct og_client_wol));
if (!cli_wol)
return NULL;
cli_wol->addr = *addr;
ev_init(&cli_wol->timer, og_client_wol_timer_cb);
cli_wol->timer.repeat = OG_WOL_CLIENT_TIMEOUT;
ev_timer_again(og_loop, &cli_wol->timer);
return cli_wol;
}
void og_client_wol_refresh(struct og_client_wol *cli_wol)
{
ev_timer_again(og_loop, &cli_wol->timer);
}
void og_client_wol_destroy(struct og_client_wol *cli_wol)
{
ev_timer_stop(og_loop, &cli_wol->timer);
list_del(&cli_wol->list);
free(cli_wol);
}
const char *og_client_wol_status(const struct og_client_wol *wol)
{
return "WOL_SENT";
}
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