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wireshark/wiretap/erf.c
Gerald Combs 68d23708bc From Stephen Donnelly via bug 2235: 
This plugin implements a dissector for Infiniband. It is released 
under the GPL v2.

Rather than using say libpcap to capture raw (unframed) IP packets 
from near the top of an IPoIB stack, this plugin dissects link level
Infiniband frames.

Infiniband trace files can be read from Endace ERF format trace 
files, or from libpcap DLT_ERF files containing ERF TYPE_INFINIBAND 
records. There is currently no native DLT_INFINIBAND in libpcap.

Each record contains a hardware timestamp, capture metadata such as 
port Id, and a complete link level Infiniband frame starting from
the Local Route Header.

svn path=/trunk/; revision=24628
2008-03-14 17:47:53 +00:00

406 lines
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/*
*
* Copyright (c) 2003 Endace Technology Ltd, Hamilton, New Zealand.
* All rights reserved.
*
* This software and documentation has been developed by Endace Technology Ltd.
* along with the DAG PCI network capture cards. For further information please
* visit http://www.endace.com/.
*
* 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.
*
* 3. The name of Endace Technology Ltd may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY ENDACE TECHNOLOGY LTD ``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 ENDACE TECHNOLOGY LTD 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.
*
* $Id$
*/
/*
* erf - Endace ERF (Extensible Record Format)
*
* See
*
* http://www.endace.com/support/EndaceRecordFormat.pdf
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "wtap-int.h"
#include "file_wrappers.h"
#include "buffer.h"
#include "atm.h"
#include "erf.h"
static int erf_read_header(
FILE_T fh,
struct wtap_pkthdr *phdr,
union wtap_pseudo_header *pseudo_header,
erf_header_t *erf_header,
int *err,
gchar **err_info,
guint32 *bytes_read,
guint32 *packet_size);
static gboolean erf_read(wtap *wth, int *err, gchar **err_info,
gint64 *data_offset);
static gboolean erf_seek_read(wtap *wth, gint64 seek_off,
union wtap_pseudo_header *pseudo_header, guchar *pd,
int length, int *err, gchar **err_info);
int erf_open(wtap *wth, int *err, gchar **err_info _U_)
{
int i, n, records_for_erf_check = RECORDS_FOR_ERF_CHECK;
char *s;
erf_timestamp_t prevts,ts;
erf_header_t header;
guint32 mc_hdr;
guint16 eth_hdr;
guint32 packet_size;
guint16 rlen,wlen;
size_t r;
gchar * buffer;
memset(&prevts, 0, sizeof(prevts));
/* number of records to scan before deciding if this really is ERF */
if ((s = getenv("ERF_RECORDS_TO_CHECK")) != NULL) {
if ((n = atoi(s)) > 0 && n < 101) {
records_for_erf_check = n;
}
}
/*
* ERF is a little hard because there's no magic number; we look at
* the first few records and see if they look enough like ERF
* records.
*/
for (i = 0; i < records_for_erf_check; i++) { /* records_for_erf_check */
r = file_read(&header,1,sizeof(header),wth->fh);
if (r == 0 ) break;
if (r != sizeof(header)) {
if ((*err = file_error(wth->fh)) != 0) {
return -1;
} else {
/* ERF header too short accept the file,
only if the very first records have been successfully checked */
if (i < MIN_RECORDS_FOR_ERF_CHECK) {
return 0;
} else {
/* BREAK, the last record is too short, and will be ignored */
break;
}
}
}
rlen=g_ntohs(header.rlen);
wlen=g_ntohs(header.wlen);
packet_size = rlen - sizeof(header);
if (packet_size > WTAP_MAX_PACKET_SIZE) {
/*
* Probably a corrupt capture file; don't blow up trying
* to allocate space for an immensely-large packet.
*/
return 0;
}
/* Skip PAD records, timestamps may not be set */
if (header.type == ERF_TYPE_PAD) {
if (file_seek(wth->fh, packet_size, SEEK_CUR, err) == -1) {
return -1;
}
continue;
}
if (rlen < wlen) {
/* record length must be greater than wire length */
switch(header.type) {
case ERF_TYPE_ETH:
case ERF_TYPE_COLOR_ETH:
case ERF_TYPE_DSM_COLOR_ETH:
/* skip the test, we have a file with truncated snaplen */
break;
default:
return 0;
}
}
/* fail on invalid record type, decreasing timestamps or non-zero pad-bits */
/* Not all types within this range are decoded, but it is a first filter */
if (header.type == 0 || header.type > ERF_TYPE_MAX ) {
return 0;
}
/* The ERF_TYPE_MAX is the PAD record, but the last used type is ERF_TYPE_AAL2 */
if (header.type > ERF_TYPE_INFINIBAND) {
return 0;
}
if ((ts = pletohll(&header.ts)) < prevts) {
/* reassembled AAL5 records may not be in time order, so allow 1 sec fudge */
if (header.type == ERF_TYPE_AAL5) {
if ( ((prevts-ts)>>32) > 1 ) {
return 0;
}
} else {
/* For other records, allow 1/256 sec fudge */
if ( (prevts-ts)>>24 > 1) {
return 0;
}
}
}
memcpy(&prevts, &ts, sizeof(prevts));
/* Read over MC or ETH subheader */
switch(header.type) {
case ERF_TYPE_MC_HDLC:
case ERF_TYPE_MC_RAW:
case ERF_TYPE_MC_ATM:
case ERF_TYPE_MC_RAW_CHANNEL:
case ERF_TYPE_MC_AAL5:
case ERF_TYPE_MC_AAL2:
case ERF_TYPE_COLOR_MC_HDLC_POS:
if (file_read(&mc_hdr,1,sizeof(mc_hdr),wth->fh) != sizeof(mc_hdr)) {
*err = file_error(wth->fh);
return -1;
}
packet_size -= sizeof(mc_hdr);
break;
case ERF_TYPE_ETH:
case ERF_TYPE_COLOR_ETH:
case ERF_TYPE_DSM_COLOR_ETH:
if (file_read(&eth_hdr,1,sizeof(eth_hdr),wth->fh) != sizeof(eth_hdr)) {
*err = file_error(wth->fh);
return -1;
}
packet_size -= sizeof(eth_hdr);
break;
default:
break;
}
/* The file_seek function do not return an error if the end of file
is reached whereas the record is truncated */
buffer=g_malloc(packet_size);
r = file_read(buffer, 1, packet_size, wth->fh);
g_free(buffer);
if (r != packet_size) {
/* ERF record too short, accept the file,
only if the very first records have been successfully checked */
if (i < MIN_RECORDS_FOR_ERF_CHECK) {
return 0;
}
}
} /* records_for_erf_check */
if (file_seek(wth->fh, 0L, SEEK_SET, err) == -1) { /* rewind */
return -1;
}
wth->data_offset = 0;
/* This is an ERF file */
wth->file_type = WTAP_FILE_ERF;
wth->snapshot_length = 0; /* not available in header, only in frame */
/*
* Use the encapsulation for ERF records.
*/
wth->file_encap = WTAP_ENCAP_ERF;
wth->subtype_read = erf_read;
wth->subtype_seek_read = erf_seek_read;
wth->tsprecision = WTAP_FILE_TSPREC_NSEC;
return 1;
}
/* Read the next packet */
static gboolean erf_read(wtap *wth, int *err, gchar **err_info,
gint64 *data_offset)
{
erf_header_t erf_header;
guint32 packet_size, bytes_read;
*data_offset = wth->data_offset;
do {
if (!erf_read_header(wth->fh,
&wth->phdr, &wth->pseudo_header, &erf_header,
err, err_info, &bytes_read, &packet_size)) {
return FALSE;
}
wth->data_offset += bytes_read;
} while ( erf_header.type == ERF_TYPE_PAD );
buffer_assure_space(wth->frame_buffer, packet_size);
wtap_file_read_expected_bytes(buffer_start_ptr(wth->frame_buffer),
(gint32)(packet_size), wth->fh, err );
wth->data_offset += packet_size;
return TRUE;
}
static gboolean erf_seek_read(wtap *wth, gint64 seek_off,
union wtap_pseudo_header *pseudo_header, guchar *pd,
int length, int *err, gchar **err_info)
{
erf_header_t erf_header;
guint32 packet_size;
if (length) {};
if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
return FALSE;
if (!erf_read_header(wth->random_fh, NULL, pseudo_header, &erf_header,
err, err_info, NULL, &packet_size))
return FALSE;
wtap_file_read_expected_bytes(pd, (int)packet_size, wth->random_fh, err);
return TRUE;
}
static int erf_read_header(
FILE_T fh,
struct wtap_pkthdr *phdr,
union wtap_pseudo_header *pseudo_header,
erf_header_t *erf_header,
int *err,
gchar **err_info,
guint32 *bytes_read,
guint32 *packet_size)
{
guint32 rec_size;
guint32 mc_hdr;
guint16 eth_hdr;
wtap_file_read_expected_bytes(erf_header, sizeof(*erf_header), fh, err);
if (bytes_read != NULL) {
*bytes_read = sizeof(*erf_header);
}
rec_size = g_ntohs(erf_header->rlen);
*packet_size = rec_size - sizeof(*erf_header);
if (*packet_size > WTAP_MAX_PACKET_SIZE) {
/*
* Probably a corrupt capture file; don't blow up trying
* to allocate space for an immensely-large packet.
*/
*err = WTAP_ERR_BAD_RECORD;
*err_info = g_strdup_printf("erf: File has %u-byte packet, bigger than maximum of %u",
*packet_size, WTAP_MAX_PACKET_SIZE);
return FALSE;
}
if (phdr != NULL) {
guint64 ts = pletohll(&erf_header->ts);
phdr->ts.secs = (long) (ts >> 32);
ts = ((ts & 0xffffffff) * 1000 * 1000 * 1000);
ts += (ts & 0x80000000) << 1; /* rounding */
phdr->ts.nsecs = ((long) (ts >> 32));
if (phdr->ts.nsecs >= 1000000000) {
phdr->ts.nsecs -= 1000000000;
phdr->ts.secs += 1;
}
}
/* Copy the ERF pseudo header */
pseudo_header->erf.phdr.ts = pletohll(&erf_header->ts);
pseudo_header->erf.phdr.type = erf_header->type;
pseudo_header->erf.phdr.flags = erf_header->flags;
pseudo_header->erf.phdr.rlen = g_ntohs(erf_header->rlen);
pseudo_header->erf.phdr.lctr = g_ntohs(erf_header->lctr);
pseudo_header->erf.phdr.wlen = g_ntohs(erf_header->wlen);
switch (erf_header->type) {
case ERF_TYPE_INFINIBAND:
if (phdr != NULL)
{
phdr->len = g_htons(erf_header->wlen);
phdr->caplen = g_htons(erf_header->wlen);
}
break;
case ERF_TYPE_HDLC_POS:
case ERF_TYPE_COLOR_HDLC_POS:
case ERF_TYPE_DSM_COLOR_HDLC_POS:
case ERF_TYPE_ATM:
case ERF_TYPE_AAL5:
case ERF_TYPE_AAL2:
break;
case ERF_TYPE_ETH:
case ERF_TYPE_COLOR_ETH:
case ERF_TYPE_DSM_COLOR_ETH:
wtap_file_read_expected_bytes(&eth_hdr, sizeof(eth_hdr), fh, err);
if (bytes_read != NULL)
*bytes_read += sizeof(eth_hdr);
*packet_size -= sizeof(eth_hdr);
pseudo_header->erf.subhdr.eth_hdr = g_htons(eth_hdr);
break;
case ERF_TYPE_MC_HDLC:
case ERF_TYPE_MC_RAW:
case ERF_TYPE_MC_ATM:
case ERF_TYPE_MC_RAW_CHANNEL:
case ERF_TYPE_MC_AAL5:
case ERF_TYPE_MC_AAL2:
case ERF_TYPE_COLOR_MC_HDLC_POS:
wtap_file_read_expected_bytes(&mc_hdr, sizeof(mc_hdr), fh, err);
if (bytes_read != NULL)
*bytes_read += sizeof(mc_hdr);
*packet_size -= sizeof(mc_hdr);
pseudo_header->erf.subhdr.mc_hdr = g_htonl(mc_hdr);
break;
case ERF_TYPE_IP_COUNTER:
case ERF_TYPE_TCP_FLOW_COUNTER:
/* unsupported, continue with default: */
default:
*err = WTAP_ERR_UNSUPPORTED_ENCAP;
*err_info = g_strdup_printf("erf: unknown record encapsulation %u",
erf_header->type);
return FALSE;
}
if (phdr != NULL) {
phdr->len = g_htons(erf_header->wlen);
phdr->caplen = g_htons(erf_header->rlen);
}
return TRUE;
}
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