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/* $OpenBSD: debug.c,v 1.2 2003/06/04 04:46:13 jason Exp $ */
/*
* Copyright (c) 2000 Network Security Technologies, Inc. http://www.netsec.net
*
* 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 ``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 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.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/ppp_defs.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <string.h>
#include <ctype.h>
#include "pppoe.h"
void
debug_packet(u_int8_t *pkt, int len)
{
struct ether_header eh;
struct pppoe_header ph;
if (option_verbose == 0)
return;
if (len < sizeof(eh)) {
printf("short packet (%d)\n", len);
return;
}
bcopy(pkt, &eh, sizeof(eh));
pkt += sizeof(eh);
len -= sizeof(eh);
eh.ether_type = ntohs(eh.ether_type);
if (eh.ether_type == ETHERTYPE_PPPOE && option_verbose < 2)
return;
printf("%s -> %s %04x[",
ether_ntoa((struct ether_addr *)eh.ether_shost),
ether_ntoa((struct ether_addr *)eh.ether_dhost),
eh.ether_type);
switch (eh.ether_type) {
case ETHERTYPE_PPPOEDISC:
printf("discovery]");
break;
case ETHERTYPE_PPPOE:
printf("session]");
break;
default:
printf("unknown]\n");
return;
}
if (len < sizeof(ph)) {
printf("short packet (%d)\n", len);
return;
}
bcopy(pkt, &ph, sizeof(ph));
pkt += sizeof(ph);
len -= sizeof(ph);
ph.sessionid = ntohs(ph.sessionid);
ph.len = ntohs(ph.len);
if (ph.len <= len)
len = ph.len;
else {
printf("missing (%d)\n", ph.len - len);
return;
}
printf(": version %d, type %d, ",
PPPOE_VER(ph.vertype), PPPOE_TYPE(ph.vertype));
switch (ph.code) {
case PPPOE_CODE_SESSION:
printf("session");
case PPPOE_CODE_PADO:
printf("PADO");
break;
case PPPOE_CODE_PADI:
printf("PADI");
break;
case PPPOE_CODE_PADR:
printf("PADR");
break;
case PPPOE_CODE_PADS:
printf("PADS");
break;
case PPPOE_CODE_PADT:
printf("PADT");
break;
default:
printf("unknown");
break;
}
printf(", len %d\n", len);
while (len > 0 && eh.ether_type == ETHERTYPE_PPPOEDISC) {
int i;
u_int16_t ttype, tlen;
if (len < sizeof(ttype)) {
printf("|\n");
return;
}
bcopy(pkt, &ttype, sizeof(ttype));
len -= sizeof(ttype);
pkt += sizeof(ttype);
ttype = ntohs(ttype);
printf("\ttag ");
switch (ttype) {
case PPPOE_TAG_END_OF_LIST:
printf("end-of-list");
break;
case PPPOE_TAG_SERVICE_NAME:
printf("service-name");
break;
case PPPOE_TAG_AC_NAME:
printf("ac-name");
break;
case PPPOE_TAG_HOST_UNIQ:
printf("host-uniq");
break;
case PPPOE_TAG_AC_COOKIE:
printf("ac-cookie");
break;
case PPPOE_TAG_VENDOR_SPEC:
printf("vendor-spec");
break;
case PPPOE_TAG_RELAY_SESSION:
printf("relay-session");
break;
case PPPOE_TAG_SERVICE_NAME_ERROR:
printf("service-name-error");
break;
case PPPOE_TAG_AC_SYSTEM_ERROR:
printf("ac-system-error");
break;
case PPPOE_TAG_GENERIC_ERROR:
printf("generic-error");
break;
default:
printf("unknown %04x", ttype);
break;
}
if (len < sizeof(tlen)) {
printf("|\n");
return;
}
bcopy(pkt, &tlen, sizeof(tlen));
len -= sizeof(tlen);
pkt += sizeof(tlen);
tlen = ntohs(tlen);
printf(", len %d", tlen);
if (len < tlen) {
printf("|\n");
return;
}
for (i = 0; i < tlen; i++) {
if (isprint(pkt[i]))
printf("%c", pkt[i]);
else
printf("\\%03o", pkt[i]);
}
len -= tlen;
}
}
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