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/* SPDX-License-Identifier: LGPL-2.1-only */
/*
* Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
*/
#include <netlink/cli/utils.h>
#include <netlink/cli/link.h>
#include <netlink/cli/mdb.h>
#include <linux/rtnetlink.h>
static const struct {
enum rtnetlink_groups gr_id;
const char* gr_name;
} known_groups[] = {
{ RTNLGRP_LINK, "link" },
{ RTNLGRP_NOTIFY, "notify" },
{ RTNLGRP_NEIGH, "neigh" },
{ RTNLGRP_TC, "tc" },
{ RTNLGRP_IPV4_IFADDR, "ipv4-ifaddr" },
{ RTNLGRP_IPV4_MROUTE, "ipv4-mroute" },
{ RTNLGRP_IPV4_ROUTE, "ipv4-route" },
{ RTNLGRP_IPV6_IFADDR, "ipv6-ifaddr" },
{ RTNLGRP_IPV6_MROUTE, "ipv6-mroute" },
{ RTNLGRP_IPV6_ROUTE, "ipv6-route" },
{ RTNLGRP_IPV6_IFINFO, "ipv6-ifinfo" },
{ RTNLGRP_DECnet_IFADDR, "decnet-ifaddr" },
{ RTNLGRP_DECnet_ROUTE, "decnet-route" },
{ RTNLGRP_IPV6_PREFIX, "ipv6-prefix" },
{ RTNLGRP_IPV4_NETCONF, "ipv4-netconf" },
{ RTNLGRP_IPV6_NETCONF, "ipv6-netconf" },
{ RTNLGRP_MPLS_NETCONF, "mpls-netconf" },
{ RTNLGRP_MDB, "mdb" },
{ RTNLGRP_NONE, NULL }
};
static void obj_input(struct nl_object *obj, void *arg)
{
nl_object_dump(obj, arg);
}
static int event_input(struct nl_msg *msg, void *arg)
{
if (nl_msg_parse(msg, &obj_input, arg) < 0)
fprintf(stderr, "<<EVENT>> Unknown message type\n");
/* Exit nl_recvmsgs_def() and return to the main select() */
return NL_STOP;
}
static void print_usage(void)
{
int i;
printf(
"Usage: nl-monitor [OPTION] [<groups>]\n"
"\n"
"Options\n"
" -d, --debug=LEVEL Set libnl debug level { 0 - 7 }\n"
" -f, --format=TYPE Output format { brief | details | stats }\n"
" -h, --help Show this help.\n"
"\n"
);
printf("Known groups:");
for (i = 0; known_groups[i].gr_id != RTNLGRP_NONE; i++)
printf(" %s", known_groups[i].gr_name);
printf("\n");
exit(0);
}
int main(int argc, char *argv[])
{
struct nl_dump_params dp = {
.dp_type = NL_DUMP_STATS,
.dp_fd = stdout,
.dp_dump_msgtype = 1,
};
struct nl_sock *sock;
int err = 1;
int i, idx;
sock = nl_cli_alloc_socket();
nl_socket_disable_seq_check(sock);
nl_socket_modify_cb(sock, NL_CB_VALID, NL_CB_CUSTOM, event_input, &dp);
for (;;) {
int c, optidx = 0;
static struct option long_opts[] = {
{ "debug", 1, 0, 'd' },
{ "format", 1, 0, 'f' },
{ "help", 0, 0, 'h' },
{ 0, 0, 0, 0 }
};
c = getopt_long(argc, argv, "d:f:h", long_opts, &optidx);
if (c == -1)
break;
switch (c) {
case 'd':
nl_debug = atoi(optarg);
break;
case 'f':
dp.dp_type = nl_cli_parse_dumptype(optarg);
break;
default:
print_usage();
break;
}
}
nl_cli_connect(sock, NETLINK_ROUTE);
for (idx = optind; argc > idx; idx++) {
for (i = 0; known_groups[i].gr_id != RTNLGRP_NONE; i++) {
if (!strcmp(argv[idx], known_groups[i].gr_name)) {
if ((err = nl_socket_add_membership(sock, known_groups[i].gr_id)) < 0) {
nl_cli_fatal(err, "%s: %s\n", argv[idx],
nl_geterror(err));
}
break;
}
}
if (known_groups[i].gr_id == RTNLGRP_NONE)
fprintf(stderr, "Warning: Unknown group: %s\n", argv[idx]);
}
nl_cli_link_alloc_cache(sock);
while (1) {
fd_set rfds;
int fd, retval;
fd = nl_socket_get_fd(sock);
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
/* wait for an incoming message on the netlink socket */
retval = select(fd+1, &rfds, NULL, NULL, NULL);
if (retval) {
/* FD_ISSET(fd, &rfds) will be true */
nl_recvmsgs_default(sock);
}
}
return 0;
}
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