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/*
* Embedded Linux library
* Copyright (C) 2022 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 <net/if.h>
#include <sys/socket.h>
#include <linux/if_arp.h>
#include <arpa/inet.h>
#include <getopt.h>
#include <errno.h>
#include <ell/ell.h>
static bool apply;
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 log_addresses(const char *af_str, const char *action,
const struct l_queue_entry *entry)
{
if (!entry)
return;
l_info("[netconfig%s] Addresses %s:", af_str, action);
for (; entry; entry = entry->next) {
struct l_rtnl_address *addr = entry->data;
char ip_str[INET6_ADDRSTRLEN];
l_rtnl_address_get_address(addr, ip_str);
l_info("[netconfig%s] \t%s/%i, orig lifetime %i s",
af_str, ip_str,
l_rtnl_address_get_prefix_length(addr),
l_rtnl_address_get_valid_lifetime(addr));
}
}
static void log_routes(const char *af_str, const char *action,
const struct l_queue_entry *entry)
{
if (!entry)
return;
l_info("[netconfig%s] Routes %s:", af_str, action);
for (; entry; entry = entry->next) {
struct l_rtnl_route *rt = entry->data;
char subnet_str[INET6_ADDRSTRLEN] = "unknown";
char gateway_str[INET6_ADDRSTRLEN];
uint8_t prefix_len;
bool onlink;
l_rtnl_route_get_dst(rt, subnet_str, &prefix_len);
onlink = !l_rtnl_route_get_gateway(rt, gateway_str);
l_info("[netconfig%s] \t%s/%i, %s%s, orig lifetime %i s",
af_str, subnet_str, prefix_len,
onlink ? "onlink" : "next-hop ",
onlink ? "" : gateway_str,
l_rtnl_route_get_lifetime(rt));
}
}
static void event_handler(struct l_netconfig *netconfig, uint8_t family,
enum l_netconfig_event event, void *user_data)
{
const char *af_str = family == AF_INET ? "v4" : "v6";
const struct l_queue_entry *added, *updated, *removed, *expired;
switch (event) {
case L_NETCONFIG_EVENT_CONFIGURE:
l_info("[netconfig%s] Configure", af_str);
break;
case L_NETCONFIG_EVENT_UPDATE:
l_info("[netconfig%s] Update", af_str);
break;
case L_NETCONFIG_EVENT_UNCONFIGURE:
l_info("[netconfig%s] Unconfigure", af_str);
break;
case L_NETCONFIG_EVENT_FAILED:
l_info("[netconfig%s] Failed", af_str);
l_main_quit();
return;
}
l_netconfig_get_addresses(netconfig, &added, &updated,
&removed, &expired);
log_addresses(af_str, "added", added);
log_addresses(af_str, "updated", updated);
log_addresses(af_str, "removed", removed);
log_addresses(af_str, "expired", expired);
l_netconfig_get_routes(netconfig, &added, &updated, &removed, &expired);
log_routes(af_str, "added", added);
log_routes(af_str, "updated", updated);
log_routes(af_str, "removed", removed);
log_routes(af_str, "expired", expired);
if (apply)
l_netconfig_apply_rtnl(netconfig);
}
static const struct option main_options[] = {
{ "apply", no_argument, NULL, 'a' },
{ }
};
int main(int argc, char *argv[])
{
struct l_netconfig *netconfig;
int ifindex;
if (argc < 2) {
printf("Usage: %s <interface> [options]\n", argv[0]);
return EXIT_SUCCESS;
}
ifindex = if_nametoindex(argv[1]);
if (!ifindex) {
fprintf(stderr, "if_nametoindex(%s): %s\n", argv[1],
strerror(errno));
return EXIT_FAILURE;
}
for (;;) {
int opt = getopt_long(argc - 2, argv + 2, "a", main_options,
NULL);
if (opt < 0)
break;
switch (opt) {
case 'a':
apply = true;
break;
}
}
if (!l_main_init())
return EXIT_FAILURE;
l_log_set_stderr();
l_debug_enable("*");
netconfig = l_netconfig_new(ifindex);
l_netconfig_set_event_handler(netconfig, event_handler, NULL, NULL);
l_dhcp_client_set_debug(l_netconfig_get_dhcp_client(netconfig),
do_debug, "[DHCPv4] ", NULL, L_LOG_DEBUG);
l_netconfig_start(netconfig);
l_main_run_with_signal(signal_handler, NULL);
l_netconfig_destroy(netconfig);
l_main_exit();
return EXIT_SUCCESS;
}
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