/*
|
* src/nf-monitor.c Monitor netfilter events
|
*
|
* This library is free software; you can redistribute it and/or
|
* modify it under the terms of the GNU Lesser General Public
|
* License as published by the Free Software Foundation version 2.1
|
* of the License.
|
*
|
* Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
|
* Copyright (c) 2007 Philip Craig <philipc@snapgear.com>
|
* Copyright (c) 2007 Secure Computing Corporation
|
*/
|
|
#include <netlink/cli/utils.h>
|
#include <netlink/netfilter/nfnl.h>
|
|
static void obj_input(struct nl_object *obj, void *arg)
|
{
|
struct nl_dump_params dp = {
|
.dp_type = NL_DUMP_STATS,
|
.dp_fd = stdout,
|
.dp_dump_msgtype = 1,
|
};
|
|
nl_object_dump(obj, &dp);
|
}
|
|
static int event_input(struct nl_msg *msg, void *arg)
|
{
|
if (nl_msg_parse(msg, &obj_input, NULL) < 0)
|
fprintf(stderr, "<<EVENT>> Unknown message type\n");
|
|
/* Exit nl_recvmsgs_def() and return to the main select() */
|
return NL_STOP;
|
}
|
|
int main(int argc, char *argv[])
|
{
|
struct nl_sock *sock;
|
int err;
|
int i, idx;
|
|
static const struct {
|
enum nfnetlink_groups gr_id;
|
const char* gr_name;
|
} groups[] = {
|
{ NFNLGRP_CONNTRACK_NEW, "ct-new" },
|
{ NFNLGRP_CONNTRACK_UPDATE, "ct-update" },
|
{ NFNLGRP_CONNTRACK_DESTROY, "ct-destroy" },
|
{ NFNLGRP_NONE, NULL }
|
};
|
|
sock = nl_cli_alloc_socket();
|
nl_socket_disable_seq_check(sock);
|
nl_socket_modify_cb(sock, NL_CB_VALID, NL_CB_CUSTOM, event_input, NULL);
|
|
if (argc > 1 && !strcasecmp(argv[1], "-h")) {
|
printf("Usage: nf-monitor [<groups>]\n");
|
|
printf("Known groups:");
|
for (i = 0; groups[i].gr_id != NFNLGRP_NONE; i++)
|
printf(" %s", groups[i].gr_name);
|
printf("\n");
|
return 2;
|
}
|
|
nl_cli_connect(sock, NETLINK_NETFILTER);
|
|
for (idx = 1; argc > idx; idx++) {
|
for (i = 0; groups[i].gr_id != NFNLGRP_NONE; i++) {
|
if (strcmp(argv[idx], groups[i].gr_name))
|
continue;
|
|
err = nl_socket_add_membership(sock, groups[i].gr_id);
|
if (err < 0)
|
nl_cli_fatal(err,
|
"Unable to add membership: %s",
|
nl_geterror(err));
|
break;
|
}
|
|
if (groups[i].gr_id == NFNLGRP_NONE)
|
nl_cli_fatal(NLE_OBJ_NOTFOUND, "Unknown group: \"%s\"",
|
argv[idx]);
|
}
|
|
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;
|
}
|
