#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.28 2001-10-04 09:47:34 itojun Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.29 2001-10-16 06:09:01 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
* print_nsap
* Print out an NSAP.
*/
-static void
+static int
print_nsap(register const u_char *cp, register int length)
{
int i;
for (i = 0; i < length; i++) {
+ if (!TTEST2(*cp, 1))
+ return (0);
printf("%02x", *cp++);
if (((i & 1) == 0) && (i + 1 < length)) {
printf(".");
}
}
+ return (1);
}
-static void
+static int
isis_print_sysid(const u_char *cp)
{
int i;
for (i = 1; i <= 6; i++) {
+ if (!TTEST2(*cp, 1))
+ return (0);
printf("%02x", *cp++);
if ((i==2)^(i==4)) {
printf(".");
}
}
+ return (1);
}
-static void
+static int
isis_print_nodeid(const u_char *cp)
{
int i;
for (i = 1; i <= 7; i++) {
+ if (!TTEST2(*cp, 1))
+ return (0);
printf("%02x", *cp++);
if ((i & 1) == 0) {
printf(".");
}
}
+ return (1);
}
static void
printf("-%02x", *cp);
}
-static void
+static int
isis_print_tlv_ip_reach (const u_char *cp, int length)
{
int bitmasks[33] = {
if (length < sizeof(*tlv_ip_reach)) {
printf("short IP reachability (%d vs %lu)", length,
(unsigned long)sizeof(*tlv_ip_reach));
- return;
+ return (0);
}
+ if (!TTEST(*tlv_ip_reach))
+ return (0);
+
mask = EXTRACT_32BITS(tlv_ip_reach->mask);
prefix_len = 0;
length -= sizeof(struct isis_tlv_ip_reach);
tlv_ip_reach++;
}
+ return (1);
}
/*
packet_len=length;
optr = p; /* initialize the _o_riginal pointer - need it for parsing the checksum TLV */
header = (const struct isis_common_header *)p;
+ TCHECK(*header);
pptr = p+(ISIS_COMMON_HEADER_SIZE);
header_iih_lan = (const struct isis_iih_lan_header *)pptr;
header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
*/
if (header->nlpid != NLPID_ISIS) {
printf(", coding error!");
- return(0);
+ return (0);
}
if (header->version != ISIS_VERSION) {
printf(", version %d packet not supported", header->version);
- return(0);
+ return (0);
}
if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) {
printf(", system ID length of %d is not supported",
header->id_length);
- return(0);
+ return (0);
}
if (header->pkt_version != ISIS_VERSION) {
printf(", version %d packet not supported", header->pkt_version);
- return(0);
+ return (0);
}
max_area = header->max_area;
break;
case 255:
printf(", bad packet -- 255 areas");
- return(0);
+ return (0);
default:
break;
}
case L1_LAN_IIH:
case L2_LAN_IIH:
- if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
- printf(", bogus fixed header length %u should be %lu",
- header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
- return(0);
- }
- printf(", L%s Lan IIH",
- ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1");
- printf("\n\t\t source-id: ");
- isis_print_sysid(header_iih_lan->source_id);
- printf(", holding time: %us",EXTRACT_16BITS(header_iih_lan->holding_time));
- switch(header_iih_lan->circuit_type) {
- case 1:
- printf(", Level 1 only");
- break;
- case 2:
- printf(", Level 2 only");
- break;
- case 3:
- printf(", Level 1, Level 2");
- break;
- default:
- printf(", unknown 0x%02x", header_iih_lan->circuit_type);
- break;
- }
- printf("\n\t\t lan-id: ");
- isis_print_nodeid(header_iih_lan->lan_id);
- printf(", Priority: %u",(header_iih_lan->priority) & PRIORITY_MASK);
-
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
+ return (0);
+ }
+ printf(", L%s Lan IIH",
+ ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1");
+ TCHECK(*header_iih_lan);
+ printf("\n\t\t source-id: ");
+ isis_print_sysid(header_iih_lan->source_id);
+ printf(", holding time: %us",EXTRACT_16BITS(header_iih_lan->holding_time));
+ switch(header_iih_lan->circuit_type) {
+
+ case 1:
+ printf(", Level 1 only");
+ break;
+
+ case 2:
+ printf(", Level 2 only");
+ break;
+
+ case 3:
+ printf(", Level 1, Level 2");
+ break;
+
+ default:
+ printf(", unknown 0x%02x", header_iih_lan->circuit_type);
+ break;
+ }
+ printf("\n\t\t lan-id: ");
+ isis_print_nodeid(header_iih_lan->lan_id);
+ printf(", Priority: %u",(header_iih_lan->priority) & PRIORITY_MASK);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
break;
case PTP_IIH:
- if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
- printf(", bogus fixed header length %u should be %lu",
- header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
- return(0);
- }
- printf(", PTP IIH");
-
- printf("\n\t\t source-id: ");
- isis_print_sysid(header_iih_ptp->source_id);
- printf(", holding time: %us",EXTRACT_16BITS(header_iih_ptp->holding_time));
- printf(", circuit-id: 0x%02x", header_iih_ptp->circuit_id);
- switch(header_iih_ptp->circuit_type) {
- case 1:
- printf(", Level 1 only");
- break;
- case 2:
- printf(", Level 2 only");
- break;
- case 3:
- printf(", Level 1, Level 2");
- break;
- default:
- printf(", unknown 0x%02x", header_iih_ptp->circuit_type);
- break;
- }
-
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
+ return (0);
+ }
+ printf(", PTP IIH");
+ TCHECK(*header_iih_ptp);
+ printf("\n\t\t source-id: ");
+ isis_print_sysid(header_iih_ptp->source_id);
+ printf(", holding time: %us",EXTRACT_16BITS(header_iih_ptp->holding_time));
+ printf(", circuit-id: 0x%02x", header_iih_ptp->circuit_id);
+ switch(header_iih_ptp->circuit_type) {
+
+ case 1:
+ printf(", Level 1 only");
+ break;
+
+ case 2:
+ printf(", Level 2 only");
+ break;
+
+ case 3:
+ printf(", Level 1, Level 2");
+ break;
+
+ default:
+ printf(", unknown 0x%02x", header_iih_ptp->circuit_type);
+ break;
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
break;
case L1_LSP:
case L2_LSP:
- if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
- printf(", bogus fixed header length %u should be %lu",
- header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
- return(0);
- }
- if ( pdu_type == L1_LSP)
- printf(", L1 LSP");
- if ( pdu_type == L2_LSP)
- printf(", L2 LSP");
-
- printf("\n\t\t lsp-id: ");
- isis_print_lspid(header_lsp->lsp_id);
- printf(", sequence number: 0x%08x",EXTRACT_32BITS(header_lsp->sequence_number));
- printf(", lifetime: %5us",EXTRACT_16BITS(header_lsp->remaining_lifetime));
- printf("\n\t\t checksum: 0x%04x",EXTRACT_16BITS(header_lsp->checksum));
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
+ return (0);
+ }
+ if (pdu_type == L1_LSP)
+ printf(", L1 LSP");
+ else if (pdu_type == L2_LSP)
+ printf(", L2 LSP");
+
+ TCHECK(*header_lsp);
+ printf("\n\t\t lsp-id: ");
+ isis_print_lspid(header_lsp->lsp_id);
+ printf(", sequence number: 0x%08x",EXTRACT_32BITS(header_lsp->sequence_number));
+ printf(", lifetime: %5us",EXTRACT_16BITS(header_lsp->remaining_lifetime));
+ printf("\n\t\t checksum: 0x%04x",EXTRACT_16BITS(header_lsp->checksum));
- printf(", %s", ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
-
- if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
- printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
- printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
- printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
- printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
- printf("ATT bit set, ");
- }
- printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
- printf("%s", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
+ printf(", %s", ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
+
+ if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
+ printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
+ printf("ATT bit set, ");
+ }
+ printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
+ printf("%s", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
- break;
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ break;
case L1_CSNP:
case L2_CSNP:
- if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
- printf(", bogus fixed header length %u should be %lu",
- header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
- return(0);
- }
- printf(", L%s CSNP", ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1");
- printf("\n\t\t source-id: ");
- isis_print_nodeid(header_csnp->source_id);
- printf("\n\t\t start lsp-id: ");
- isis_print_lspid(header_csnp->start_lsp_id);
- printf("\n\t\t end lsp-id: ");
- isis_print_lspid(header_csnp->end_lsp_id);
-
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
+ return (0);
+ }
+ printf(", L%s CSNP", ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1");
+ TCHECK(*header_csnp);
+ printf("\n\t\t source-id: ");
+ isis_print_nodeid(header_csnp->source_id);
+ printf("\n\t\t start lsp-id: ");
+ isis_print_lspid(header_csnp->start_lsp_id);
+ printf("\n\t\t end lsp-id: ");
+ isis_print_lspid(header_csnp->end_lsp_id);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
break;
case L1_PSNP:
case L2_PSNP:
- if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
- printf("- bogus fixed header length %u should be %lu",
- header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
- return(0);
- }
- printf(", L%s PSNP", ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1");
- printf("\n\t\t source-id: ");
- isis_print_nodeid(header_psnp->source_id);
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ printf("- bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
+ return (0);
+ }
+ printf(", L%s PSNP", ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1");
+ TCHECK(*header_psnp);
+ printf("\n\t\t source-id: ");
+ isis_print_nodeid(header_psnp->source_id);
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
- break;
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ break;
+
default:
- printf(", PDU type (0x%02x) not supported", pdu_type);
- return(1);
+ printf(", PDU type (0x%02x) not supported", pdu_type);
+ return (1);
}
/*
while (packet_len >= 2) {
if (pptr == snapend) {
- return(1);
+ return (1);
}
- if (pptr >= snapend) {
+ if (!TTEST2(*pptr, 2)) {
printf("\n\t\t\t packet exceeded snapshot (%ld) bytes",
- (long)(pptr-snapend));
- return(1);
+ (long)(pptr-snapend));
+ return (1);
}
type = *pptr++;
len = *pptr++;
printf("Area address(es) (%u)",len);
tmp = len;
tptr = pptr;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
alen = *tptr++;
while (tmp && alen < tmp) {
printf("\n\t\t\tArea address (%u): ",alen);
- print_nsap(tptr, alen);
+ if (!print_nsap(tptr, alen))
+ return (1);
tptr += alen;
tmp -= alen + 1;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
alen = *tptr++;
}
break;
tptr = pptr;
while (tmp >= ETHER_ADDR_LEN) {
printf("\n\t\t\tIS Neighbor: ");
- isis_print_sysid(tptr);
+ if (!isis_print_sysid(tptr))
+ return (1);
tmp -= ETHER_ADDR_LEN;
tptr += ETHER_ADDR_LEN;
}
tmp=len;
while (tmp>0) {
printf("\n\t\t\t");
+ if (!TTEST2(*tptr, 2))
+ goto trunctlv;
switch(EXTRACT_16BITS(tptr)&0x0fff) {
- case 0:
+
+ case 0:
printf("IPv4 unicast");
break;
+
case 1:
printf("In-Band Management");
break;
+
case 2:
printf("IPv6 unicast");
break;
+
case 3:
printf("Multicast");
break;
+
case 4095:
printf("Development, Experimental or Proprietary");
break;
+
default:
printf("Reserved for IETF Consensus");
+ break;
}
- printf(" Topology (0x%03x)",EXTRACT_16BITS(tptr)&0x0fff);
+ printf(" Topology (0x%03x)",EXTRACT_16BITS(tptr)&0x0fff);
tptr+=2;
printf("\n\t\t\t IS Neighbor: ");
- isis_print_nodeid(tptr);
+ if (!isis_print_nodeid(tptr))
+ return (1);
tptr+=(SYSTEM_ID_LEN+1);
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
printf(", Metric: %d",EXTRACT_24BITS(tptr));
tptr+=3;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
tslen=*(tptr++);
printf(", %ssub-TLVs present",tslen ? "" : "no ");
tmp=len;
while (tmp>0) {
printf("\n\t\t\tIS Neighbor: ");
- isis_print_nodeid(tptr);
+ if (!isis_print_nodeid(tptr))
+ return (1);
tptr+=(SYSTEM_ID_LEN+1);
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
printf(", Metric: %d",EXTRACT_24BITS(tptr));
tptr+=3;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
tslen=*(tptr++);
printf(", %ssub-TLVs present",tslen ? "" : "no ");
if (tslen) {
printf(" (%u)",tslen);
ttslen=tslen;
while (ttslen>0) {
+ if (!TTEST2(*tptr,2))
+ goto trunctlv;
printf("\n\t\t\t ");
subt=*(tptr++);
subl=*(tptr++);
printf("Administrative groups: 0x%08x", EXTRACT_32BITS(tptr));
break;
case SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
j = EXTRACT_32BITS(tptr);
memcpy (&bw, &j, 4);
printf("Maximum link bandwidth : %.3f Mbps",
bw*8/1000000 );
break;
case SUBTLV_EXT_IS_REACH_RESERVABLE_BW :
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
j = EXTRACT_32BITS(tptr);
memcpy (&bw, &j, 4);
printf("Reservable link bandwidth: %.3f Mbps",
bw*8/1000000 );
break;
case SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
- printf("Unreserved bandwidth:");
- for (i = 0 ; i < 8 ; i++) {
+ printf("Unreserved bandwidth:");
+ for (i = 0; i < 8; i++) {
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
j = EXTRACT_32BITS(tptr);
memcpy (&bw, &j, 4);
printf("\n\t\t\t priority level %d: %.3f Mbps",
i, bw*8/1000000 );
- tptr+=4;
+ tptr+=4;
}
tptr-=32;
break;
case SUBTLV_EXT_IS_REACH_TE_METRIC:
+ if (!TTEST2(*tptr,3))
+ goto trunctlv;
printf("Traffic Engineering Metric: %d", EXTRACT_24BITS(tptr));
break;
case SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
printf("IPv4 interface address: %s", ipaddr_string(tptr));
break;
case SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
printf("IPv4 neighbor address: %s", ipaddr_string(tptr));
break;
case 250:
case TLV_IS_REACH:
printf("IS Reachability (%u)",len);
tlv_is_reach = (const struct isis_tlv_is_reach *)pptr;
+ if (!TTEST(*tlv_is_reach))
+ goto trunctlv;
printf("\n\t\t\tIS Neighbor: ");
isis_print_nodeid(tlv_is_reach->neighbor_nodeid);
tmp = len;
while (tmp >= sizeof(struct isis_tlv_is_reach)) {
+ if (!TTEST(*tlv_is_reach))
+ goto trunctlv;
printf(", Default Metric: %d, %s",
ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_default),
tmp -= sizeof(struct isis_tlv_is_reach);
tlv_is_reach++;
}
-
-
break;
+
case TLV_IP_REACH:
printf("IP Internal reachability (%u)",len);
- isis_print_tlv_ip_reach(pptr, len);
- break;
+ if (!isis_print_tlv_ip_reach(pptr, len))
+ return (1);
+ break;
case TLV_IP_REACH_EXT:
printf("IP External reachability (%u)",len);
- isis_print_tlv_ip_reach(pptr, len);
+ if (!isis_print_tlv_ip_reach(pptr, len))
+ return (1);
break;
case TLV_EXT_IP_REACH:
printf("Extended IP reachability (%u)",len);
- i=len;
- tptr=pptr;
+ i=len;
+ tptr=pptr;
- while (i>0) {
- memset (prefix, 0, 4);
- metric = EXTRACT_32BITS(tptr);
- tptr+=4;
-
- j=*(tptr);
- bit_length = (*(tptr)++&0x3f);
- byte_length = (bit_length + 7) / 8;
- memcpy(prefix,tptr,byte_length);
-
- printf("\n\t\t\tIPv4 prefix: %u.%u.%u.%u/%d",
- prefix[0],
- prefix[1],
- prefix[2],
- prefix[3],
- bit_length);
-
- printf("\n\t\t\t Metric: %u, Distribution: %s",
- metric,
- ISIS_MASK_TLV_EXT_IP_UPDOWN(j) ? "down" : "up");
-
- printf(", %ssub-TLVs present",
- ISIS_MASK_TLV_EXT_IP_SUBTLV(j) ? "" : "no ");
+ while (i>0) {
+ memset (prefix, 0, 4);
+ if (!TTEST2(*tptr, 4))
+ return (1);
+ metric = EXTRACT_32BITS(tptr);
+ tptr+=4;
+
+ if (!TTEST2(*tptr, 1))
+ return (1);
+ j=*(tptr);
+ bit_length = (*(tptr)++&0x3f);
+ byte_length = (bit_length + 7) / 8;
+ if (!TTEST2(*tptr, byte_length))
+ return (1);
+ memcpy(prefix,tptr,byte_length);
+
+ printf("\n\t\t\tIPv4 prefix: %u.%u.%u.%u/%d",
+ prefix[0],
+ prefix[1],
+ prefix[2],
+ prefix[3],
+ bit_length);
+
+ printf("\n\t\t\t Metric: %u, Distribution: %s",
+ metric,
+ ISIS_MASK_TLV_EXT_IP_UPDOWN(j) ? "down" : "up");
+
+ printf(", %ssub-TLVs present",
+ ISIS_MASK_TLV_EXT_IP_SUBTLV(j) ? "" : "no ");
- i-=(5+byte_length);
- tptr+=byte_length;
- }
- break;
+ i-=(5+byte_length);
+ tptr+=byte_length;
+ }
+ break;
case TLV_AUTH:
+ if (!TTEST2(*pptr, 1))
+ goto trunctlv;
printf("Authentication (%u)",len);
- if(*pptr==SUBTLV_AUTH_SIMPLE) {
- printf("\n\t\t\tsimple text password: ");
- for(i=1;i<len;i++) {
- printf("%c",*(pptr+i));
- }
+ if (*pptr==SUBTLV_AUTH_SIMPLE) {
+ printf("\n\t\t\tsimple text password: ");
+ for(i=1;i<len;i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%c",*(pptr+i));
}
- if(*pptr==SUBTLV_AUTH_MD5) {
- printf("\n\t\t\tMD5 password: ");
- for(i=1;i<len;i++) {
- printf("%02x",*(pptr+i));
- }
- }
+ }
+ if (!TTEST2(*pptr, 1))
+ goto trunctlv;
+ if (*pptr==SUBTLV_AUTH_MD5) {
+ printf("\n\t\t\tMD5 password: ");
+ for(i=1;i<len;i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%02x",*(pptr+i));
+ }
+ }
break;
+
case TLV_PTP_ADJ:
- printf("point-to-point Adjacency State (%u)",len);
- tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)pptr;
- i=len;
+ printf("Point-to-point Adjacency State (%u)",len);
+ tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)pptr;
+ i=len;
if(i>=1) {
- printf("\n\t\t\tAdjacency State: %s",
- tok2str(isis_ptp_adjancey_values, "#0x%x", *pptr));
- i--;
- }
+ if (!TTEST2(*pptr, 1))
+ goto trunctlv;
+ printf("\n\t\t\tAdjacency State: %s",
+ tok2str(isis_ptp_adjancey_values, "#0x%x", *pptr));
+ i--;
+ }
if(i>=4) {
- printf("\n\t\t\tExtended Local circuit ID: 0x%08x",
- EXTRACT_32BITS(tlv_ptp_adj->ext_local_circuit_id));
- i-=4;
- }
+ if (!TTEST2(tlv_ptp_adj->ext_local_circuit_id, 4))
+ goto trunctlv;
+ printf("\n\t\t\tExtended Local circuit ID: 0x%08x",
+ EXTRACT_32BITS(tlv_ptp_adj->ext_local_circuit_id));
+ i-=4;
+ }
if(i>=6) {
- printf("\n\t\t\tNeighbor SystemID: ");
- isis_print_sysid(tlv_ptp_adj->neighbor_sysid);
- i-=6;
- }
+ if (!TTEST2(tlv_ptp_adj->neighbor_sysid, 6))
+ goto trunctlv;
+ printf("\n\t\t\tNeighbor SystemID: ");
+ isis_print_sysid(tlv_ptp_adj->neighbor_sysid);
+ i-=6;
+ }
if(i>=4) {
- printf("\n\t\t\tNeighbor Extended Local circuit ID: 0x%08x",
- EXTRACT_32BITS(tlv_ptp_adj->neighbor_ext_local_circuit_id));
- }
-
+ if (!TTEST2(tlv_ptp_adj->neighbor_ext_local_circuit_id, 4))
+ goto trunctlv;
+ printf("\n\t\t\tNeighbor Extended Local circuit ID: 0x%08x",
+ EXTRACT_32BITS(tlv_ptp_adj->neighbor_ext_local_circuit_id));
+ }
break;
+
case TLV_PROTOCOLS:
printf("Protocols supported (%u)", len);
printf("\n\t\t\tNLPID(s): ");
- for(i=0;i<len;i++) {
- printf("%s (0x%02x)",tok2str(isis_nlpid_values, "Unknown", *(pptr+i)),*(pptr+i));
- if(i<len-1)
- printf(", ");
+ for (i = 0; i < len; i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%s (0x%02x)",tok2str(isis_nlpid_values, "Unknown", *(pptr+i)),*(pptr+i));
+ if (i<len-1)
+ printf(", ");
}
break;
+
case TLV_TE_ROUTER_ID:
- printf("Traffic Engineering Router ID (%u)",len);
+ printf("Traffic Engineering Router ID (%u)",len);
+ if (!TTEST2(*pptr, 4))
+ goto trunctlv;
printf("\n\t\t\tTraffic Engineering Router ID: %s", ipaddr_string(pptr));
break;
+
case TLV_IPADDR:
printf("IP Interface address(es) (%u)",len);
i=len;
- while(i>0) {
- printf("\n\t\t\tIPv4 interface address: %s", ipaddr_string(pptr));
- i -=4;
- }
+ while (i>0) {
+ if (!TTEST2(*pptr, 4))
+ goto trunctlv;
+ printf("\n\t\t\tIPv4 interface address: %s", ipaddr_string(pptr));
+ pptr += 4;
+ i -= 4;
+ }
break;
case TLV_HOSTNAME:
- printf("Hostname (%u)", len);
- printf("\n\t\t\tHostname: ");
- for(i=0;i<len;i++) {
- printf("%c",*(pptr+i));
- }
- break;
+ printf("Hostname (%u)", len);
+ printf("\n\t\t\tHostname: ");
+ for(i = 0; i < len; i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%c",*(pptr+i));
+ }
+ break;
case TLV_LSP:
- tlv_lsp = (const struct isis_tlv_lsp *)pptr;
+ tlv_lsp = (const struct isis_tlv_lsp *)pptr;
printf("LSP entries (%u)", len);
i=0;
- while(i<len) {
- printf("\n\t\t\tlsp-id: ");
- isis_print_nodeid(tlv_lsp->lsp_id);
- printf("-%02x",(tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1]);
- printf("\n\t\t\t sequence number: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number));
- printf("\n\t\t\t Remaining lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime));
- printf("\n\t\t\t checksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum));
- i+=sizeof(struct isis_tlv_lsp);
- tlv_lsp++;
- }
+ while(i<len) {
+ printf("\n\t\t\tlsp-id: ");
+ if (!isis_print_nodeid(tlv_lsp->lsp_id))
+ return (1);
+ if (!TTEST((tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1]))
+ goto trunctlv;
+ printf("-%02x",(tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1]);
+ if (!TTEST2(tlv_lsp->sequence_number, 4))
+ goto trunctlv;
+ printf("\n\t\t\t sequence number: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number));
+ if (!TTEST2(tlv_lsp->remaining_lifetime, 2))
+ goto trunctlv;
+ printf("\n\t\t\t Remaining lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime));
+ if (!TTEST2(tlv_lsp->checksum, 2))
+ goto trunctlv;
+ printf("\n\t\t\t checksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum));
+ i+=sizeof(struct isis_tlv_lsp);
+ tlv_lsp++;
+ }
break;
case TLV_CHECKSUM:
- printf("Checksum (%u)", len);
- printf("\n\t\t\tchecksum: 0x%04x",
- EXTRACT_16BITS(pptr));
-
- if (osi_cksum(optr, length, off))
- printf(" (incorrect)");
+ if (!TTEST2(*pptr, 2))
+ goto trunctlv;
+ printf("Checksum (%u)", len);
+ printf("\n\t\t\tchecksum: 0x%04x",
+ EXTRACT_16BITS(pptr));
+
+ if (osi_cksum(optr, length, off))
+ printf(" (incorrect)");
else
- printf(" (correct)");
-
+ printf(" (correct)");
break;
case TLV_MT_SUPPORTED:
- printf("Multi Topology (%u)",len);
- i=len;
- tptr=pptr;
- while (i>1) {
+ printf("Multi Topology (%u)",len);
+ i=len;
+ tptr=pptr;
+ while (i>1) {
/* length can only be a multiple of 2, otherwise there is
something broken -> so decode down until length is 1 */
- if (i!=1)
- {
- printf("\n\t\t\t");
- switch(EXTRACT_16BITS(tptr)&0x0fff) {
- case 0:
- printf("IPv4 unicast");
- break;
- case 1:
- printf("In-Band Management");
- break;
- case 2:
- printf("IPv6 unicast");
- break;
- case 3:
- printf("Multicast");
- break;
- case 4095:
- printf("Development, Experimental or Proprietary");
- break;
- default:
- printf("Reserved for IETF Consensus");
- }
- printf(" Topology (0x%03x)%s%s",
- EXTRACT_16BITS(tptr)&0xfff,
- (EXTRACT_16BITS(tptr)&0x8000) ? "" : ", no sub-TLVs present",
- (EXTRACT_16BITS(tptr)&0x4000) ? ", ATT bit set" : "" );
- }
- else
- {
- printf("\n\t\t\tmalformed MT-ID");
+ if (i!=1) {
+ if (!TTEST2(*tptr, 2))
+ goto trunctlv;
+ printf("\n\t\t\t");
+ switch(EXTRACT_16BITS(tptr)&0x0fff) {
+
+ case 0:
+ printf("IPv4 unicast");
+ break;
+
+ case 1:
+ printf("In-Band Management");
+ break;
+
+ case 2:
+ printf("IPv6 unicast");
break;
- }
+
+ case 3:
+ printf("Multicast");
+ break;
+
+ case 4095:
+ printf("Development, Experimental or Proprietary");
+ break;
+
+ default:
+ printf("Reserved for IETF Consensus");
+ break;
+ }
+ printf(" Topology (0x%03x)%s%s",
+ EXTRACT_16BITS(tptr)&0xfff,
+ (EXTRACT_16BITS(tptr)&0x8000) ? "" : ", no sub-TLVs present",
+ (EXTRACT_16BITS(tptr)&0x4000) ? ", ATT bit set" : "" );
+ } else {
+ printf("\n\t\t\tmalformed MT-ID");
+ break;
+ }
i-=2;
tptr+=2;
- }
- break;
+ }
+ break;
default:
printf("unknown TLV, type %d, length %d", type, len);
if (packet_len != 0) {
printf("\n\t\t\t %d straggler bytes", packet_len);
}
+ return (1);
+
+trunc:
+ fputs("[|isis]", stdout);
+ return (1);
+
+trunctlv:
+ printf("\n\t\t\t packet exceeded snapshot");
return(1);
}
projects / tcpdump / blobdiff