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/* ulogd_MAC.c, Version $Revision: 1.7 $
*
* ulogd logging interpreter for MAC addresses, TIME, IP and TCP headers, etc.
*
* (C) 2000 by Harald Welte <laforge@gnumonks.org>
* This software is released under the terms of GNU GPL
*
* $Id: ulogd_BASE.c,v 1.7 2000/11/16 17:20:52 laforge Exp $
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <ulogd.h>
#include <linux/ip.h>
#include <linux/in.h>
#include <linux/tcp.h>
#include <linux/icmp.h>
#include <linux/udp.h>
/***********************************************************************
* Raw header
***********************************************************************/
static ulog_iret_t mac_rets[1] = {
{ NULL, NULL, 0, ULOGD_RET_STRING, ULOGD_RETF_FREE, "raw.mac", NULL },
};
static ulog_iret_t *_interp_mac(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
unsigned char *p;
int i;
char *buf, *oldbuf = NULL;
ulog_iret_t *ret = ip->result;
if (pkt->mac_len) {
buf = (char *) malloc(3 * pkt->mac_len + 1);
if (!buf) {
ulogd_error("OOM!!!\n");
return NULL;
}
*buf = '\0';
p = pkt->mac;
oldbuf = buf;
for (i = 0; i < pkt->mac_len; i++, p++)
sprintf(buf, "%s%02x%c", oldbuf, *p, i==pkt->mac_len-1 ? ' ':':');
ret[0].value.ptr = buf;
ret[0].flags |= ULOGD_RETF_VALID;
return ret;
}
return NULL;
}
/***********************************************************************
* OUT OF BAND
***********************************************************************/
static ulog_iret_t oob_rets[] = {
{ NULL, NULL, 0, ULOGD_RET_STRING, ULOGD_RETF_NONE, "oob.prefix", NULL },
{ NULL, NULL, 0, ULOGD_RET_UINT32, ULOGD_RETF_NONE, "oob.time.sec", NULL },
{ NULL, NULL, 0, ULOGD_RET_UINT32, ULOGD_RETF_NONE, "oob.time.usec", NULL },
{ NULL, NULL, 0, ULOGD_RET_UINT32, ULOGD_RETF_NONE, "oob.mark", NULL },
{ NULL, NULL, 0, ULOGD_RET_STRING, ULOGD_RETF_NONE, "oob.in", NULL },
{ NULL, NULL, 0, ULOGD_RET_STRING, ULOGD_RETF_NONE, "oob.out", NULL },
};
static ulog_iret_t *_interp_oob(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
ulog_iret_t *ret = ip->result;
ret[0].value.ptr = pkt->prefix;
ret[0].flags |= ULOGD_RETF_VALID;
ret[1].value.ui32 = pkt->timestamp_sec;
ret[1].flags |= ULOGD_RETF_VALID;
ret[2].value.ui32 = pkt->timestamp_usec;
ret[2].flags |= ULOGD_RETF_VALID;
ret[3].value.ui32 = pkt->mark;
ret[3].flags |= ULOGD_RETF_VALID;
ret[4].value.ptr = pkt->indev_name;
ret[4].flags |= ULOGD_RETF_VALID;
ret[5].value.ptr = pkt->outdev_name;
ret[5].flags |= ULOGD_RETF_VALID;
return ret;
}
/***********************************************************************
* IP HEADER
***********************************************************************/
static ulog_iret_t iphdr_rets[] = {
{ NULL, NULL, 0, ULOGD_RET_IPADDR, ULOGD_RETF_NONE, "ip.saddr", 0 },
{ NULL, NULL, 0, ULOGD_RET_IPADDR, ULOGD_RETF_NONE, "ip.daddr", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "ip.protocol", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "ip.tos", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "ip.ttl", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "ip.totlen", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "ip.ihl", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "ip.csum", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "ip.id", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "ip.fragoff", 0 },
};
static ulog_iret_t *_interp_iphdr(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
ulog_iret_t *ret = ip->result;
struct iphdr *iph = (struct iphdr *) pkt->payload;
ret[0].value.ui32 = ntohl(iph->saddr);
ret[0].flags |= ULOGD_RETF_VALID;
ret[1].value.ui32 = ntohl(iph->daddr);
ret[1].flags |= ULOGD_RETF_VALID;
ret[2].value.ui8 = iph->protocol;
ret[2].flags |= ULOGD_RETF_VALID;
ret[3].value.ui8 = ntohs(iph->tos);
ret[3].flags |= ULOGD_RETF_VALID;
ret[4].value.ui8 = iph->ttl;
ret[4].flags |= ULOGD_RETF_VALID;
ret[5].value.ui16 = ntohs(iph->tot_len);
ret[5].flags |= ULOGD_RETF_VALID;
ret[6].value.ui8 = iph->ihl;
ret[6].flags |= ULOGD_RETF_VALID;
ret[7].value.ui16 = ntohs(iph->check);
ret[7].flags |= ULOGD_RETF_VALID;
ret[8].value.ui16 = ntohs(iph->id);
ret[8].flags |= ULOGD_RETF_VALID;
ret[9].value.ui16 = ntohs(iph->frag_off);
ret[9].flags |= ULOGD_RETF_VALID;
return ret;
}
/***********************************************************************
* TCP HEADER
***********************************************************************/
static ulog_iret_t tcphdr_rets[] = {
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "tcp.sport", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "tcp.dport", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT32, ULOGD_RETF_NONE, "tcp.seq", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT32, ULOGD_RETF_NONE, "tcp.ackseq", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "tcp.window", 0 },
{ NULL, NULL, 0, ULOGD_RET_BOOL, ULOGD_RETF_NONE, "tcp.urg", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "tcp.urgp", 0 },
{ NULL, NULL, 0, ULOGD_RET_BOOL, ULOGD_RETF_NONE, "tcp.ack", 0 },
{ NULL, NULL, 0, ULOGD_RET_BOOL, ULOGD_RETF_NONE, "tcp.psh", 0 },
{ NULL, NULL, 0, ULOGD_RET_BOOL, ULOGD_RETF_NONE, "tcp.rst", 0 },
{ NULL, NULL, 0, ULOGD_RET_BOOL, ULOGD_RETF_NONE, "tcp.syn", 0 },
{ NULL, NULL, 0, ULOGD_RET_BOOL, ULOGD_RETF_NONE, "tcp.fin", 0 },
};
static ulog_iret_t *_interp_tcphdr(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
struct iphdr *iph = (struct iphdr *) pkt->payload;
void *protoh = (u_int32_t *)iph + iph->ihl;
struct tcphdr *tcph = (struct tcphdr *) protoh;
ulog_iret_t *ret = ip->result;
if (iph->protocol != IPPROTO_TCP)
return NULL;
ret[0].value.ui16 = ntohs(tcph->source);
ret[0].flags |= ULOGD_RETF_VALID;
ret[1].value.ui16 = ntohs(tcph->dest);
ret[1].flags |= ULOGD_RETF_VALID;
ret[2].value.ui32 = ntohl(tcph->seq);
ret[2].flags |= ULOGD_RETF_VALID;
ret[3].value.ui32 = ntohl(tcph->ack_seq);
ret[3].flags |= ULOGD_RETF_VALID;
ret[4].value.ui16 = ntohs(tcph->window);
ret[4].flags |= ULOGD_RETF_VALID;
if (tcph->urg) {
ret[5].value.b = tcph->urg;
ret[5].flags |= ULOGD_RETF_VALID;
ret[6].value.ui16 = ntohs(tcph->urg_ptr);
ret[6].flags |= ULOGD_RETF_VALID;
}
if (tcph->ack) {
ret[7].value.b = tcph->ack;
ret[7].flags |= ULOGD_RETF_VALID;
}
if (tcph->psh) {
ret[8].value.b = tcph->psh;
ret[8].flags |= ULOGD_RETF_VALID;
}
if (tcph->rst) {
ret[9].value.b = tcph->rst;
ret[9].flags |= ULOGD_RETF_VALID;
}
if (tcph->syn) {
ret[10].value.b = tcph->syn;
ret[10].flags |= ULOGD_RETF_VALID;
}
if (tcph->fin) {
ret[11].value.b = tcph->fin;
ret[11].flags |= ULOGD_RETF_VALID;
}
return ret;
}
/***********************************************************************
* UDP HEADER
***********************************************************************/
static ulog_iret_t udphdr_rets[] = {
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "udp.sport", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "udp.dport", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "udp.len", 0 },
};
static ulog_iret_t *_interp_udp(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
struct iphdr *iph = (struct iphdr *) pkt->payload;
void *protoh = (u_int32_t *)iph + iph->ihl;
struct udphdr *udph = protoh;
ulog_iret_t *ret = ip->result;
if (iph->protocol != IPPROTO_UDP)
return NULL;
ret[0].value.ui16 = ntohs(udph->source);
ret[0].flags |= ULOGD_RETF_VALID;
ret[1].value.ui16 = ntohs(udph->dest);
ret[1].flags |= ULOGD_RETF_VALID;
ret[2].value.ui16 = ntohs(udph->len);
ret[2].flags |= ULOGD_RETF_VALID;
return ret;
}
/***********************************************************************
* ICMP HEADER
***********************************************************************/
static ulog_iret_t icmphdr_rets[] = {
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "icmp.type", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "icmp.code", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "icmp.echoid", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "icmp.echoseq", 0 },
{ NULL, NULL, 0, ULOGD_RET_IPADDR, ULOGD_RETF_NONE, "icmp.gateway", 0 },
{ NULL, NULL, 0, ULOGD_RET_UINT16, ULOGD_RETF_NONE, "icmp.fragmtu", 0 },
};
static ulog_iret_t *_interp_icmp(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
struct iphdr *iph = (struct iphdr *) pkt->payload;
void *protoh = (u_int32_t *) (iph + iph->ihl);
struct icmphdr *icmph = protoh;
ulog_iret_t *ret = ip->result;
if (iph->protocol != IPPROTO_ICMP)
return NULL;
ret[0].value.ui8 = icmph->type;
ret[0].flags |= ULOGD_RETF_VALID;
ret[1].value.ui8 = icmph->code;
ret[1].flags |= ULOGD_RETF_VALID;
switch(icmph->type) {
case ICMP_ECHO:
case ICMP_ECHOREPLY:
ret[2].value.ui16 = ntohs(icmph->un.echo.id);
ret[2].flags |= ULOGD_RETF_VALID;
ret[3].value.ui16 = ntohs(icmph->un.echo.sequence);
ret[3].flags |= ULOGD_RETF_VALID;
break;
case ICMP_REDIRECT:
case ICMP_PARAMETERPROB:
ret[4].value.ui32 = ntohl(icmph->un.gateway);
ret[4].flags |= ULOGD_RETF_VALID;
break;
case ICMP_DEST_UNREACH:
if (icmph->code == ICMP_FRAG_NEEDED) {
ret[5].value.ui16 = ntohs(icmph->un.frag.mtu);
ret[5].flags |= ULOGD_RETF_VALID;
}
break;
}
return ret;
}
/***********************************************************************
* IPSEC HEADER
***********************************************************************/
static ulog_iret_t ahesphdr_rets[] = {
{ NULL, NULL, 0, ULOGD_RET_UINT8, ULOGD_RETF_NONE, "ahesp.spi", 0 },
};
static ulog_iret_t *_interp_ahesp(struct ulog_interpreter *ip,
ulog_packet_msg_t *pkt)
{
struct iphdr *iph = (struct iphdr *) pkt->payload;
ulog_iret_t *ret = ip->result;
void *protoh = (u_int32_t *) (iph + iph->ihl);
#if 0
struct esphdr *esph = protoh;
if (iph->protocol != IPPROTO_ESP)
return NULL;
ret[0].value.ui32 = ntohl(esph->spi);
ret[0].flags |= ULOGD_RETF_VALID;
#endif
return ret;
}
static ulog_interpreter_t base_ip[] = {
{ NULL, "raw", 0, &_interp_mac, 1, &mac_rets },
{ NULL, "oob", 0, &_interp_oob, 6, &oob_rets },
{ NULL, "ip", 0, &_interp_iphdr, 10, &iphdr_rets },
{ NULL, "tcp", 0, &_interp_tcphdr, 12, &tcphdr_rets },
{ NULL, "icmp", 0, &_interp_icmp, 6, &icmphdr_rets },
{ NULL, "udp", 0, &_interp_udp, 3, &udphdr_rets },
{ NULL, "ahesp", 0, &_interp_ahesp, 1, &ahesphdr_rets },
{ NULL, "", 0, NULL, 0, { NULL } },
};
void _base_reg_ip(void)
{
ulog_interpreter_t *ip = base_ip;
ulog_interpreter_t *p;
for (p = ip; p->interp; p++) {
register_interpreter(p);
}
}
void _init(void)
{
_base_reg_ip();
}
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