/* \summary: Label Distribution Protocol (LDP) printer */
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
#include "l2vpn.h"
#include "af.h"
-
/*
* ldp common header
*
#define LDP_TLV_ATM_SESSION_PARM 0x0501
#define LDP_TLV_FR_SESSION_PARM 0x0502
#define LDP_TLV_FT_SESSION 0x0503
+#define LDP_TLV_TYPED_WC_FEC_CAP 0x050b /* rfc 5918 */
#define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
#define LDP_TLV_MTU 0x0601 /* rfc 3988 */
#define LDP_TLV_DUAL_STACK_CAP 0x0701 /* rfc 7552 */
{ LDP_TLV_ATM_SESSION_PARM, "ATM Session Parameters" },
{ LDP_TLV_FR_SESSION_PARM, "Frame-Relay Session Parameters" },
{ LDP_TLV_FT_SESSION, "Fault-Tolerant Session Parameters" },
+ { LDP_TLV_TYPED_WC_FEC_CAP, "Typed Wildcard FEC Capability" },
{ LDP_TLV_LABEL_REQUEST_MSG_ID, "Label Request Message ID" },
{ LDP_TLV_MTU, "MTU" },
{ LDP_TLV_DUAL_STACK_CAP, "Dual-Stack Capability" },
{ 0, NULL}
};
+static const struct tok ldp_status_code_values[] = {
+ /* rfc 5036 */
+ { 0x00000000, "Success" },
+ { 0x00000001, "Bad LDP Identifier" },
+ { 0x00000002, "Bad Protocol Version" },
+ { 0x00000003, "Bad PDU Length" },
+ { 0x00000004, "Unknown Message Type" },
+ { 0x00000005, "Bad Message Length" },
+ { 0x00000006, "Unknown TLV" },
+ { 0x00000007, "Bad TLV Length" },
+ { 0x00000008, "Malformted TLV Value" },
+ { 0x00000009, "Hold Timer Expired" },
+ { 0x0000000A, "Shutdown" },
+ { 0x0000000B, "Loop Detected" },
+ { 0x0000000C, "Unknown FEC" },
+ { 0x0000000D, "No Route" },
+ { 0x0000000E, "No Label Resources" },
+ { 0x0000000F, "Label Resources/Available" },
+ { 0x00000010, "Session Rejected/No Hello" },
+ { 0x00000011, "Session Rejected/Parameters Advertisement Mode" },
+ { 0x00000012, "Session Rejected/Parameters Max PDU Length" },
+ { 0x00000013, "Session Rejected/Parameters Label Range" },
+ { 0x00000014, "KeepAlive Timer Expired" },
+ { 0x00000015, "Label Request Aborted" },
+ { 0x00000016, "Missing Message Parameters" },
+ { 0x00000017, "Unsupported Address Family" },
+ { 0x00000018, "Session Rejected/Bad KeepAlive Time" },
+ { 0x00000019, "Internal Error" },
+ { 0, NULL}
+};
+
#define LDP_FEC_WILDCARD 0x01
#define LDP_FEC_PREFIX 0x02
#define LDP_FEC_HOSTADDRESS 0x03
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
-#define TLV_TCHECK(minlen) \
- if (tlv_tlen < minlen) { \
- ND_PRINT(" [tlv length %u < %u]", tlv_tlen, minlen); \
- nd_print_invalid(ndo); \
- goto invalid; \
- }
-
static u_int
ldp_tlv_print(netdissect_options *ndo,
const u_char *tptr,
const struct ldp_tlv_header *ldp_tlv_header;
u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
u_char fec_type, transport_pref;
- u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
+ u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len;
char buf[100];
int i;
switch(tlv_type) {
case LDP_TLV_COMMON_HELLO:
- TLV_TCHECK(4);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 4);
ND_PRINT("\n\t Hold Time: %us, Flags: [%s Hello%s]",
GET_BE_U_2(tptr),
(GET_BE_U_2(tptr + 2)&0x8000) ? "Targeted" : "Link",
break;
case LDP_TLV_IPV4_TRANSPORT_ADDR:
- TLV_TCHECK(4);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 4);
ND_PRINT("\n\t IPv4 Transport Address: %s", GET_IPADDR_STRING(tptr));
break;
case LDP_TLV_IPV6_TRANSPORT_ADDR:
- TLV_TCHECK(16);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 16);
ND_PRINT("\n\t IPv6 Transport Address: %s", GET_IP6ADDR_STRING(tptr));
break;
case LDP_TLV_CONFIG_SEQ_NUMBER:
- TLV_TCHECK(4);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 4);
ND_PRINT("\n\t Sequence Number: %u", GET_BE_U_4(tptr));
break;
case LDP_TLV_ADDRESS_LIST:
- TLV_TCHECK(LDP_TLV_ADDRESS_LIST_AFNUM_LEN);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <,
+ LDP_TLV_ADDRESS_LIST_AFNUM_LEN);
af = GET_BE_U_2(tptr);
tptr+=LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
tlv_tlen -= LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
}
break;
+ case LDP_TLV_HOP_COUNT:
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 1);
+ ND_PRINT("\n\t Hop Count: %u", GET_U_1(tptr));
+ break;
+
+ case LDP_TLV_PATH_VECTOR:
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 4);
+ ND_PRINT("\n\t Path Vector: %s", GET_IPADDR_STRING(tptr));
+ tptr += 4;
+ tlv_tlen -= 4;
+ while (tlv_tlen >= 4) {
+ ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
+ tptr += 4;
+ tlv_tlen -= 4;
+ }
+ break;
+
case LDP_TLV_COMMON_SESSION:
- TLV_TCHECK(14);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 14);
ND_PRINT("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
GET_BE_U_2(tptr), GET_BE_U_2(tptr + 2),
(GET_BE_U_2(tptr + 4)&0x8000) ? "On Demand" : "Unsolicited",
break;
case LDP_TLV_FEC:
- TLV_TCHECK(1);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 1);
fec_type = GET_U_1(tptr);
ND_PRINT("\n\t %s FEC (0x%02x)",
tok2str(ldp_fec_values, "Unknown", fec_type),
case LDP_FEC_WILDCARD:
break;
case LDP_FEC_PREFIX:
- TLV_TCHECK(2);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 2);
af = GET_BE_U_2(tptr);
tptr+=2;
tlv_tlen-=2;
* We assume the type was supposed to be one of the MPLS
* Pseudowire Types.
*/
- TLV_TCHECK(7);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 7);
vc_info_len = GET_U_1(tptr + 2);
/*
}
/* Make sure we have the VC ID as well */
- TLV_TCHECK(11);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 11);
ND_PRINT(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
tok2str(mpls_pw_types_values, "Unknown", GET_BE_U_2(tptr)&0x7fff),
GET_BE_U_2(tptr)&0x8000 ? "" : "no ",
/* Skip past the fixed information and the VC ID */
tptr+=11;
tlv_tlen-=11;
- TLV_TCHECK(vc_info_len);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, vc_info_len);
while (vc_info_len > 2) {
vc_info_tlv_type = GET_U_1(tptr);
case LDP_FEC_MARTINI_IFPARM_DESC:
ND_PRINT(": ");
- for (idx = 2; idx < vc_info_tlv_len; idx++)
- fn_print_char(ndo, GET_U_1(tptr + idx));
+ nd_printjn(ndo, tptr + 2, vc_info_tlv_len - 2);
break;
case LDP_FEC_MARTINI_IFPARM_VCCV:
break;
case LDP_TLV_GENERIC_LABEL:
- TLV_TCHECK(4);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 4);
ND_PRINT("\n\t Label: %u", GET_BE_U_4(tptr) & 0xfffff);
break;
case LDP_TLV_STATUS:
- TLV_TCHECK(8);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 10);
ui = GET_BE_U_4(tptr);
tptr+=4;
- ND_PRINT("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
- ui&0x3fffffff,
- ui&0x80000000 ? "Fatal error" : "Advisory Notification",
- ui&0x40000000 ? "do" : "don't");
+ ND_PRINT("\n\t Status Code: %s, Flags: [%s and %s forward]",
+ tok2str(ldp_status_code_values, "Unknown", ui&0x3fffffff),
+ ui&0x80000000 ? "Fatal error" : "Advisory Notification",
+ ui&0x40000000 ? "do" : "don't");
ui = GET_BE_U_4(tptr);
tptr+=4;
if (ui)
ND_PRINT(", causing Message ID: 0x%08x", ui);
+ ui = GET_BE_U_2(tptr);
+ if (ui)
+ ND_PRINT(", Message Type: %s", tok2str(ldp_msg_values, "Unknown", ui));
break;
case LDP_TLV_FT_SESSION:
- TLV_TCHECK(12);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 12);
ft_flags = GET_BE_U_2(tptr);
ND_PRINT("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
ft_flags&0x8000 ? "" : "No ",
ND_PRINT(", Recovery Time: %ums", ui);
break;
+ case LDP_TLV_TYPED_WC_FEC_CAP:
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 1);
+ ND_PRINT("\n\t %s", GET_U_1(tptr)&0x80 ? "Support" : "No Support");
+ break;
+
case LDP_TLV_MTU:
- TLV_TCHECK(2);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 2);
ND_PRINT("\n\t MTU: %u", GET_BE_U_2(tptr));
break;
case LDP_TLV_DUAL_STACK_CAP:
- TLV_TCHECK(4);
+ ND_ICHECKMSG_U("tlv length", tlv_tlen, <, 4);
transport_pref = GET_U_1(tptr);
ND_PRINT("\n\t Transport Connection Preference: %s",
tok2str(ldp_dual_stack_transport_pref_values,
transport_pref));
break;
-
/*
* FIXME those are the defined TLVs that lack a decoder
* you are welcome to contribute code ;-)
*/
- case LDP_TLV_HOP_COUNT:
- case LDP_TLV_PATH_VECTOR:
case LDP_TLV_ATM_LABEL:
case LDP_TLV_FR_LABEL:
case LDP_TLV_EXTD_STATUS:
nd_trunc_longjmp(ndo);
invalid:
+ nd_print_invalid(ndo);
return(tlv_len+4); /* Type & Length fields not included */
}
tptr = pptr + sizeof(struct ldp_common_header);
tlen = pdu_len - (sizeof(struct ldp_common_header)-4); /* Type & Length fields not included */
- while(tlen>0) {
+ while(tlen != 0) {
/* did we capture enough for fully decoding the msg header ? */
ND_TCHECK_LEN(tptr, sizeof(struct ldp_msg_header));
projects / tcpdump / blobdiff