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/*-
* Copyright (c) 2004, 2005 Gleb Smirnoff <glebius@FreeBSD.org>
* Copyright (c) 2001-2003 Roman V. Palagin <romanp@unshadow.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $SourceForge: flowctl.c,v 1.15 2004/08/31 20:24:58 glebius Exp $
*/
#ifndef lint
static const char rcs_id[] =
"@(#) $FreeBSD$";
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netgraph.h>
#include <netgraph/netflow/ng_netflow.h>
#define CISCO_SH_FLOW_HEADER "SrcIf SrcIPaddress DstIf DstIPaddress Pr SrcP DstP Pkts\n"
#define CISCO_SH_FLOW "%-13s %-15s %-13s %-15s %2u %4.4x %4.4x %6lu\n"
int main(int, char **);
static int flow_cache_print(struct ngnf_flows *recs);
static int ctl_show(int, char **);
static void help(void);
static void execute_command(int, char **);
struct ip_ctl_cmd {
char *cmd_name;
int (*cmd_func)(int argc, char **argv);
};
struct ip_ctl_cmd cmds[] = {
{"show", ctl_show},
{NULL, NULL},
};
int cs;
char ng_nodename[NG_PATHLEN + 1];
int
main(int argc, char **argv)
{
int c;
char sname[NG_NODESIZ];
int rcvbuf = SORCVBUF_SIZE;
char *ng_name;
/* parse options */
while ((c = getopt(argc, argv, "d:")) != -1) {
switch (c) {
case 'd': /* set libnetgraph debug level. */
NgSetDebug(atoi(optarg));
break;
}
}
argc -= optind;
argv += optind;
ng_name = argv[0];
if (ng_name == NULL)
help();
argc--;
argv++;
snprintf(ng_nodename, sizeof(ng_nodename), "%s:", ng_name);
/* create control socket. */
snprintf(sname, sizeof(sname), "flowctl%i", getpid());
if (NgMkSockNode(sname, &cs, NULL) == -1)
err(1, "NgMkSockNode");
/* set receive buffer size */
if (setsockopt(cs, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(int)) == -1)
err(1, "setsockopt(SOL_SOCKET, SO_RCVBUF)");
/* parse and execute command */
execute_command(argc, argv);
close(cs);
exit(0);
}
static void
execute_command(int argc, char **argv)
{
int cindex = -1;
int i;
if (!argc)
help();
for (i = 0; cmds[i].cmd_name != NULL; i++)
if (!strncmp(argv[0], cmds[i].cmd_name, strlen(argv[0]))) {
if (cindex != -1)
errx(1, "ambiguous command: %s", argv[0]);
cindex = i;
}
if (cindex == -1)
errx(1, "bad command: %s", argv[0]);
argc--;
argv++;
(*cmds[cindex].cmd_func)(argc, argv);
}
static int
ctl_show(int argc, char **argv)
{
struct ng_mesg *ng_mesg;
struct ngnf_flows *data;
char path[NG_PATHLEN + 1];
int token, nread, last = 0;
ng_mesg = alloca(SORCVBUF_SIZE);
printf(CISCO_SH_FLOW_HEADER);
for (;;) {
/* request set of accounting records */
token = NgSendMsg(cs, ng_nodename, NGM_NETFLOW_COOKIE,
NGM_NETFLOW_SHOW, (void *)&last, sizeof(last));
if (token == -1)
err(1, "NgSendMsg(NGM_NETFLOW_SHOW)");
/* read reply */
nread = NgRecvMsg(cs, ng_mesg, SORCVBUF_SIZE, path);
if (nread == -1)
err(1, "NgRecvMsg() failed");
if (ng_mesg->header.token != token)
err(1, "NgRecvMsg(NGM_NETFLOW_SHOW): token mismatch");
data = (struct ngnf_flows*)ng_mesg->data;
if ((ng_mesg->header.arglen < (sizeof(*data))) ||
(ng_mesg->header.arglen < (sizeof(*data) +
(data->nentries * sizeof(struct flow_entry_data)))))
err(1, "NgRecvMsg(NGM_NETFLOW_SHOW): arglen too small");
(void )flow_cache_print(data);
if (data->last != 0)
last = data->last;
else
break;
}
return (0);
}
static int
flow_cache_print(struct ngnf_flows *recs)
{
struct flow_entry_data *fle;
char src[INET_ADDRSTRLEN], dst[INET_ADDRSTRLEN];
char src_if[IFNAMSIZ], dst_if[IFNAMSIZ];
int i;
/* quick check */
if (recs->nentries == 0)
return (0);
fle = recs->entries;
for (i = 0; i < recs->nentries; i++, fle++) {
inet_ntop(AF_INET, &fle->r.r_src, src, sizeof(src));
inet_ntop(AF_INET, &fle->r.r_dst, dst, sizeof(dst));
printf(CISCO_SH_FLOW,
if_indextoname(fle->fle_i_ifx, src_if),
src,
if_indextoname(fle->fle_o_ifx, dst_if),
dst,
fle->r.r_ip_p,
ntohs(fle->r.r_sport),
ntohs(fle->r.r_dport),
fle->packets);
}
return (i);
}
static void
help(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-d level] nodename command\n", __progname);
exit (0);
}
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