create project
This commit is contained in:
lijia
166
print-nflog.c
Normal file
166
print-nflog.c
Normal file
@@ -0,0 +1,166 @@
|
||||
/*
|
||||
* Copyright (c) 2013, Petar Alilovic,
|
||||
* Faculty of Electrical Engineering and Computing, University of Zagreb
|
||||
* All rights reserved
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* * 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.
|
||||
*/
|
||||
|
||||
#ifdef HAVE_CONFIG_H
|
||||
#include "config.h"
|
||||
#endif
|
||||
|
||||
#include <netdissect-stdinc.h>
|
||||
|
||||
#include "netdissect.h"
|
||||
|
||||
#if defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H)
|
||||
#include <pcap/nflog.h>
|
||||
|
||||
static const struct tok nflog_values[] = {
|
||||
{ AF_INET, "IPv4" },
|
||||
#ifdef AF_INET6
|
||||
{ AF_INET6, "IPv6" },
|
||||
#endif /*AF_INET6*/
|
||||
{ 0, NULL }
|
||||
};
|
||||
|
||||
static inline void
|
||||
nflog_hdr_print(netdissect_options *ndo, const nflog_hdr_t *hdr, u_int length)
|
||||
{
|
||||
ND_PRINT((ndo, "version %d, resource ID %d", hdr->nflog_version, ntohs(hdr->nflog_rid)));
|
||||
|
||||
if (!ndo->ndo_qflag) {
|
||||
ND_PRINT((ndo,", family %s (%d)",
|
||||
tok2str(nflog_values, "Unknown",
|
||||
hdr->nflog_family),
|
||||
hdr->nflog_family));
|
||||
} else {
|
||||
ND_PRINT((ndo,", %s",
|
||||
tok2str(nflog_values,
|
||||
"Unknown NFLOG (0x%02x)",
|
||||
hdr->nflog_family)));
|
||||
}
|
||||
|
||||
ND_PRINT((ndo, ", length %u: ", length));
|
||||
}
|
||||
|
||||
u_int
|
||||
nflog_if_print(netdissect_options *ndo,
|
||||
const struct pcap_pkthdr *h, const u_char *p)
|
||||
{
|
||||
const nflog_hdr_t *hdr = (const nflog_hdr_t *)p;
|
||||
const nflog_tlv_t *tlv;
|
||||
uint16_t size;
|
||||
uint16_t h_size = sizeof(nflog_hdr_t);
|
||||
u_int caplen = h->caplen;
|
||||
u_int length = h->len;
|
||||
|
||||
if (caplen < (int) sizeof(nflog_hdr_t) || length < (int) sizeof(nflog_hdr_t)) {
|
||||
ND_PRINT((ndo, "[|nflog]"));
|
||||
return h_size;
|
||||
}
|
||||
|
||||
if (hdr->nflog_version != 0) {
|
||||
ND_PRINT((ndo, "version %u (unknown)", hdr->nflog_version));
|
||||
return h_size;
|
||||
}
|
||||
|
||||
if (ndo->ndo_eflag)
|
||||
nflog_hdr_print(ndo, hdr, length);
|
||||
|
||||
p += sizeof(nflog_hdr_t);
|
||||
length -= sizeof(nflog_hdr_t);
|
||||
caplen -= sizeof(nflog_hdr_t);
|
||||
|
||||
while (length > 0) {
|
||||
/* We have some data. Do we have enough for the TLV header? */
|
||||
if (caplen < sizeof(nflog_tlv_t) || length < sizeof(nflog_tlv_t)) {
|
||||
/* No. */
|
||||
ND_PRINT((ndo, "[|nflog]"));
|
||||
return h_size;
|
||||
}
|
||||
|
||||
tlv = (const nflog_tlv_t *) p;
|
||||
size = tlv->tlv_length;
|
||||
if (size % 4 != 0)
|
||||
size += 4 - size % 4;
|
||||
|
||||
/* Is the TLV's length less than the minimum? */
|
||||
if (size < sizeof(nflog_tlv_t)) {
|
||||
/* Yes. Give up now. */
|
||||
ND_PRINT((ndo, "[|nflog]"));
|
||||
return h_size;
|
||||
}
|
||||
|
||||
/* Do we have enough data for the full TLV? */
|
||||
if (caplen < size || length < size) {
|
||||
/* No. */
|
||||
ND_PRINT((ndo, "[|nflog]"));
|
||||
return h_size;
|
||||
}
|
||||
|
||||
if (tlv->tlv_type == NFULA_PAYLOAD) {
|
||||
/*
|
||||
* This TLV's data is the packet payload.
|
||||
* Skip past the TLV header, and break out
|
||||
* of the loop so we print the packet data.
|
||||
*/
|
||||
p += sizeof(nflog_tlv_t);
|
||||
h_size += sizeof(nflog_tlv_t);
|
||||
length -= sizeof(nflog_tlv_t);
|
||||
caplen -= sizeof(nflog_tlv_t);
|
||||
break;
|
||||
}
|
||||
|
||||
p += size;
|
||||
h_size += size;
|
||||
length -= size;
|
||||
caplen -= size;
|
||||
}
|
||||
|
||||
switch (hdr->nflog_family) {
|
||||
|
||||
case AF_INET:
|
||||
ip_print(ndo, p, length);
|
||||
break;
|
||||
|
||||
#ifdef AF_INET6
|
||||
case AF_INET6:
|
||||
ip6_print(ndo, p, length);
|
||||
break;
|
||||
#endif /* AF_INET6 */
|
||||
|
||||
default:
|
||||
if (!ndo->ndo_eflag)
|
||||
nflog_hdr_print(ndo, hdr,
|
||||
length + sizeof(nflog_hdr_t));
|
||||
|
||||
if (!ndo->ndo_suppress_default_print)
|
||||
ND_DEFAULTPRINT(p, caplen);
|
||||
break;
|
||||
}
|
||||
|
||||
return h_size;
|
||||
}
|
||||
|
||||
#endif /* defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H) */
|
||||
Reference in New Issue
Block a user