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/*
* Embedded Linux library
* Copyright (C) 2018 Intel Corporation
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <signal.h>
#include <sys/socket.h>
#include <linux/if_arp.h>
#include <ell/ell.h>
static void do_debug(const char *str, void *user_data)
{
const char *prefix = user_data;
l_info("%s%s", prefix, str);
}
static void signal_handler(uint32_t signo, void *user_data)
{
switch (signo) {
case SIGINT:
case SIGTERM:
l_info("Terminate");
l_main_quit();
break;
}
}
static void event_handler(struct l_dhcp_client *client,
enum l_dhcp_client_event event,
void *userdata)
{
const struct l_dhcp_lease *lease = l_dhcp_client_get_lease(client);
char *ip = l_dhcp_lease_get_address(lease);
char *netmask = l_dhcp_lease_get_netmask(lease);
char *gw = l_dhcp_lease_get_gateway(lease);
uint32_t lifetime = l_dhcp_lease_get_lifetime(lease);
char **dns = l_dhcp_lease_get_dns(lease);
l_info("Lease Obtained:");
l_info("\tIP: %s, Netmask: %s, Gateway: %s", ip, netmask, gw);
l_info("Lifetime: %u seconds", lifetime);
if (dns) {
char *dns_concat = l_strjoinv(dns, ',');
l_info("DNS List: %s", dns_concat);
l_free(dns_concat);
l_strfreev(dns);
} else
l_info("No DNS information obtained");
l_free(ip);
l_free(netmask);
l_free(gw);
}
int main(int argc, char *argv[])
{
struct l_dhcp_client *client;
int ifindex;
uint8_t mac[6];
if (argc < 2) {
printf("Usage: %s <interface index>\n", argv[0]);
exit(0);
}
ifindex = atoi(argv[1]);
if (!l_net_get_mac_address(ifindex, mac)) {
printf("Unable to get address from interface %d\n", ifindex);
exit(0);
}
if (!l_main_init())
return -1;
l_log_set_stderr();
l_debug_enable("*");
client = l_dhcp_client_new(ifindex);
l_dhcp_client_set_address(client, ARPHRD_ETHER, mac, 6);
l_dhcp_client_set_event_handler(client, event_handler, NULL, NULL);
l_dhcp_client_set_debug(client, do_debug, "[DHCP] ", NULL, L_LOG_DEBUG);
l_dhcp_client_start(client);
l_main_run_with_signal(signal_handler, NULL);
l_dhcp_client_destroy(client);
l_main_exit();
return 0;
}
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