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Add length checks.

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This commit is contained in:
guy 2004-03-24 01:40:44 +00:00
parent f2238c1e16
commit fc752e7dcb
1 changed files with 40 additions and 26 deletions
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66
print-isoclns.c
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@ -26,7 +26,7 @@
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.118 2004-03-18 10:58:17 hannes Exp $ (LBL)";
"@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.119 2004-03-24 01:40:44 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
@ -1060,75 +1060,89 @@ isis_print_is_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *i
case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
printf(", 0x%08x", EXTRACT_32BITS(tptr));
if (subl == 8) /* draft-ietf-isis-gmpls-extensions */
printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
if (subl >= 4) {
printf(", 0x%08x", EXTRACT_32BITS(tptr));
if (subl == 8) /* draft-ietf-isis-gmpls-extensions */
printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
printf(", %s", ipaddr_string(tptr));
if (subl >= 4)
printf(", %s", ipaddr_string(tptr));
break;
case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
bw.i = EXTRACT_32BITS(tptr);
printf(", %.3f Mbps", bw.f*8/1000000 );
if (subl >= 4) {
bw.i = EXTRACT_32BITS(tptr);
printf(", %.3f Mbps", bw.f*8/1000000 );
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
for (priority_level = 0; priority_level < 8; priority_level++) {
if (subl >= 32) {
for (priority_level = 0; priority_level < 8; priority_level++) {
bw.i = EXTRACT_32BITS(tptr);
printf("%s priority level %d: %.3f Mbps",
ident,
priority_level,
bw.f*8/1000000 );
tptr+=4;
}
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_DIFFSERV_TE:
printf("%sBandwidth Constraints Model ID: (%u)",ident, *tptr);
tptr+=4;
/* for now lets just print the first 8 BCs -
* FIXME is this dep. on the BC model ?
*/
for (bandwidth_constraint = 0; bandwidth_constraint < 8; bandwidth_constraint++) {
if (subl >= 36) {
printf("%sBandwidth Constraints Model ID: (%u)",ident, *tptr);
tptr+=4;
/* for now lets just print the first 8 BCs -
* FIXME is this dep. on the BC model ?
*/
for (bandwidth_constraint = 0; bandwidth_constraint < 8; bandwidth_constraint++) {
bw.i = EXTRACT_32BITS(tptr);
printf("%s Bandwidth constraint %d: %.3f Mbps",
ident,
bandwidth_constraint,
bw.f*8/1000000 );
tptr+=4;
}
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
printf(", %u", EXTRACT_24BITS(tptr));
if (subl >= 3)
printf(", %u", EXTRACT_24BITS(tptr));
break;
case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
printf(", %s, Priority %u",
if (subl >= 2) {
printf(", %s, Priority %u",
bittok2str(gmpls_link_prot_values, "none", *tptr),
*(tptr+1));
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
printf("%s Interface Switching Capability:%s",
if (subl >= 36) {
printf("%s Interface Switching Capability:%s",
ident,
tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
printf(", LSP Encoding: %s",
printf(", LSP Encoding: %s",
tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
tptr+=4;
printf("%s Max LSP Bandwidth:",ident);
for (priority_level = 0; priority_level < 8; priority_level++) {
tptr+=4;
printf("%s Max LSP Bandwidth:",ident);
for (priority_level = 0; priority_level < 8; priority_level++) {
bw.i = EXTRACT_32BITS(tptr);
printf("%s priority level %d: %.3f Mbps",
ident,
priority_level,
bw.f*8/1000000 );
tptr+=4;
}
subl-=36;
/* there is some optional stuff left to decode but this is as of yet
not specified so just lets hexdump what is left */
if(subl>0){
}
subl-=36;
/* there is some optional stuff left to decode but this is as of yet
not specified so just lets hexdump what is left */
if(subl>0){
if(!print_unknown_data(tptr,"\n\t\t ",
subl-36))
return(0);
}
}
break;
default: