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/* darkstat 3
* copyright (c) 2001-2008 Emil Mikulic.
*
* acct.c: traffic accounting
*
* Permission to use, copy, modify, and distribute this file for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "darkstat.h"
#include "acct.h"
#include "conv.h"
#include "daylog.h"
#include "err.h"
#include "hosts_db.h"
#include "localip.h"
#include <arpa/inet.h> /* for inet_aton() */
#define __FAVOR_BSD
#include <netinet/tcp.h>
#include <stdlib.h> /* for free */
#include <string.h> /* for memcpy */
uint64_t total_packets = 0, total_bytes = 0;
static int using_localnet = 0;
static in_addr_t localnet, localmask;
/* Parse the net/mask specification into two IPs or die trying. */
void
acct_init_localnet(const char *spec)
{
char **tokens;
int num_tokens;
struct in_addr addr;
tokens = split('/', spec, &num_tokens);
if (num_tokens != 2)
errx(1, "expecting network/netmask, got \"%s\"", spec);
if (inet_aton(tokens[0], &addr) != 1)
errx(1, "invalid network address \"%s\"", tokens[0]);
localnet = addr.s_addr;
if (inet_aton(tokens[1], &addr) != 1)
errx(1, "invalid network mask \"%s\"", tokens[1]);
localmask = addr.s_addr;
/* FIXME: improve so we can accept masks like /24 for 255.255.255.0 */
using_localnet = 1;
free(tokens[0]);
free(tokens[1]);
free(tokens);
verbosef("local network address: %s", ip_to_str(localnet));
verbosef(" local network mask: %s", ip_to_str(localmask));
if ((localnet & localmask) != localnet)
errx(1, "this is an invalid combination of address and mask!\n"
"it cannot match any address!");
}
/* Account for the given packet summary. */
void
acct_for(const pktsummary *sm)
{
struct bucket *hs = NULL, *hd = NULL;
struct bucket *ps, *pd;
int dir_in, dir_out;
#if 0 /* WANT_CHATTY? */
printf("%15s > ", ip_to_str(sm->src_ip));
printf("%15s ", ip_to_str(sm->dest_ip));
printf("len %4d proto %2d", sm->len, sm->proto);
if (sm->proto == IPPROTO_TCP || sm->proto == IPPROTO_UDP)
printf(" port %5d : %5d", sm->src_port, sm->dest_port);
if (sm->proto == IPPROTO_TCP)
printf(" %s%s%s%s%s%s",
(sm->tcp_flags & TH_FIN)?"F":"",
(sm->tcp_flags & TH_SYN)?"S":"",
(sm->tcp_flags & TH_RST)?"R":"",
(sm->tcp_flags & TH_PUSH)?"P":"",
(sm->tcp_flags & TH_ACK)?"A":"",
(sm->tcp_flags & TH_URG)?"U":""
);
printf("\n");
#endif
/* Totals. */
total_packets++;
total_bytes += sm->len;
/* Hosts. */
hs = host_get(sm->src_ip);
hs->out += sm->len;
hs->total += sm->len;
memcpy(hs->u.host.mac_addr, sm->src_mac, sizeof(sm->src_mac));
hd = host_get(sm->dest_ip); /* this can invalidate hs! */
hd->in += sm->len;
hd->total += sm->len;
memcpy(hd->u.host.mac_addr, sm->dst_mac, sizeof(sm->dst_mac));
/* Graphs. */
dir_in = dir_out = 0;
if (using_localnet) {
if ((sm->src_ip & localmask) == localnet)
dir_out = 1;
if ((sm->dest_ip & localmask) == localnet)
dir_in = 1;
if (dir_in == 1 && dir_out == 1)
/* Traffic staying within the network isn't counted. */
dir_in = dir_out = 0;
} else {
if (sm->src_ip == localip)
dir_out = 1;
if (sm->dest_ip == localip)
dir_in = 1;
}
if (dir_out) {
daylog_acct((uint64_t)sm->len, GRAPH_OUT);
graph_acct((uint64_t)sm->len, GRAPH_OUT);
}
if (dir_in) {
daylog_acct((uint64_t)sm->len, GRAPH_IN);
graph_acct((uint64_t)sm->len, GRAPH_IN);
}
/* Protocols. */
hs = host_find(sm->src_ip);
if (hs != NULL) {
ps = host_get_ip_proto(hs, sm->proto);
ps->out += sm->len;
ps->total += sm->len;
}
pd = host_get_ip_proto(hd, sm->proto);
pd->in += sm->len;
pd->total += sm->len;
/* Ports. */
switch (sm->proto)
{
case IPPROTO_TCP:
if ((sm->src_port <= highest_port) && (hs != NULL))
{
ps = host_get_port_tcp(hs, sm->src_port);
ps->out += sm->len;
ps->total += sm->len;
}
if (sm->dest_port <= highest_port)
{
pd = host_get_port_tcp(hd, sm->dest_port);
pd->in += sm->len;
pd->total += sm->len;
if (sm->tcp_flags == TH_SYN)
pd->u.port_tcp.syn++;
}
break;
case IPPROTO_UDP:
if ((sm->src_port <= highest_port) && (hs != NULL))
{
ps = host_get_port_udp(hs, sm->src_port);
ps->out += sm->len;
ps->total += sm->len;
}
if (sm->dest_port <= highest_port)
{
pd = host_get_port_udp(hd, sm->dest_port);
pd->in += sm->len;
pd->total += sm->len;
}
break;
case IPPROTO_ICMP:
/* known protocol, don't complain about it */
break;
default:
verbosef("unknown IP proto (%04x)", sm->proto);
}
}
/* vim:set ts=3 sw=3 tw=78 expandtab: */
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