* FOR A PARTICULAR PURPOSE.
*
*/
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.3 2002-12-14 13:27:56 hannes Exp $";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.20 2006-06-23 02:03:09 hannes Exp $";
#endif
#ifdef HAVE_CONFIG_H
#include <string.h>
#include "interface.h"
+#include "decode_prefix.h"
#include "extract.h"
#include "addrtoname.h"
+#include "l2vpn.h"
+#include "af.h"
+
/*
* ldp common header
*
{ LDP_MSG_INIT, "Initialization" },
{ LDP_MSG_KEEPALIVE, "Keepalive" },
{ LDP_MSG_ADDRESS, "Address" },
- { LDP_MSG_ADDRESS_WITHDRAW, "Address Widthdraw" },
+ { LDP_MSG_ADDRESS_WITHDRAW, "Address Withdraw" },
{ LDP_MSG_LABEL_MAPPING, "Label Mapping" },
{ LDP_MSG_LABEL_REQUEST, "Label Request" },
{ LDP_MSG_LABEL_WITHDRAW, "Label Withdraw" },
#define LDP_TLV_FEC 0x0100
#define LDP_TLV_ADDRESS_LIST 0x0101
+#define LDP_TLV_ADDRESS_LIST_AFNUM_LEN 2
#define LDP_TLV_HOP_COUNT 0x0103
#define LDP_TLV_PATH_VECTOR 0x0104
#define LDP_TLV_GENERIC_LABEL 0x0200
#define LDP_TLV_COMMON_SESSION 0x0500
#define LDP_TLV_ATM_SESSION_PARM 0x0501
#define LDP_TLV_FR_SESSION_PARM 0x0502
+#define LDP_TLV_FT_SESSION 0x0503
#define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
+#define LDP_TLV_MTU 0x0601 /* rfc 3988 */
static const struct tok ldp_tlv_values[] = {
{ LDP_TLV_FEC, "FEC" },
{ LDP_TLV_COMMON_SESSION, "Common Session Parameters" },
{ 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_LABEL_REQUEST_MSG_ID, "Label Request Message ID" },
+ { LDP_TLV_MTU, "MTU" },
+ { 0, NULL}
+};
+
+#define LDP_FEC_WILDCARD 0x01
+#define LDP_FEC_PREFIX 0x02
+#define LDP_FEC_HOSTADDRESS 0x03
+/* From RFC 4906; should probably be updated to RFC 4447 (e.g., VC -> PW) */
+#define LDP_FEC_MARTINI_VC 0x80
+
+static const struct tok ldp_fec_values[] = {
+ { LDP_FEC_WILDCARD, "Wildcard" },
+ { LDP_FEC_PREFIX, "Prefix" },
+ { LDP_FEC_HOSTADDRESS, "Host address" },
+ { LDP_FEC_MARTINI_VC, "Martini VC" },
{ 0, NULL}
};
-#define FALSE 0
-#define TRUE 1
+#define LDP_FEC_MARTINI_IFPARM_MTU 0x01
+#define LDP_FEC_MARTINI_IFPARM_DESC 0x03
+#define LDP_FEC_MARTINI_IFPARM_VCCV 0x0c
+static const struct tok ldp_fec_martini_ifparm_values[] = {
+ { LDP_FEC_MARTINI_IFPARM_MTU, "MTU" },
+ { LDP_FEC_MARTINI_IFPARM_DESC, "Description" },
+ { LDP_FEC_MARTINI_IFPARM_VCCV, "VCCV" },
+ { 0, NULL}
+};
+
+/* draft-ietf-pwe3-vccv-04.txt */
+static const struct tok ldp_fec_martini_ifparm_vccv_cc_values[] = {
+ { 0x01, "PWE3 control word" },
+ { 0x02, "MPLS Router Alert Label" },
+ { 0x04, "MPLS inner label TTL = 1" },
+ { 0, NULL}
+};
+
+/* draft-ietf-pwe3-vccv-04.txt */
+static const struct tok ldp_fec_martini_ifparm_vccv_cv_values[] = {
+ { 0x01, "ICMP Ping" },
+ { 0x02, "LSP Ping" },
+ { 0x04, "BFD" },
+ { 0, NULL}
+};
+
+int ldp_msg_print(register const u_char *);
int ldp_tlv_print(register const u_char *);
/*
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
+#define TLV_TCHECK(minlen) \
+ TCHECK2(*tptr, minlen); if (tlv_tlen < minlen) goto badtlv;
+
int
ldp_tlv_print(register const u_char *tptr) {
};
const struct ldp_tlv_header *ldp_tlv_header;
- u_short tlv_type,tlv_len,tlv_tlen;
+ u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;
+ u_char fec_type;
+ u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;
+ char buf[100];
+ int i;
ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
switch(tlv_type) {
case LDP_TLV_COMMON_HELLO:
+ TLV_TCHECK(4);
printf("\n\t Hold Time: %us, Flags: [%s Hello%s]",
EXTRACT_16BITS(tptr),
(EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
- (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for trageted Hellos" : "");
+ (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
break;
case LDP_TLV_IPV4_TRANSPORT_ADDR:
- printf("\n\t %s", ipaddr_string(tptr));
+ TLV_TCHECK(4);
+ printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
break;
#ifdef INET6
case LDP_TLV_IPV6_TRANSPORT_ADDR:
- printf("\n\t %s", ip6addr_string(tptr));
+ TLV_TCHECK(16);
+ printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
break;
#endif
case LDP_TLV_CONFIG_SEQ_NUMBER:
+ TLV_TCHECK(4);
printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
break;
+ case LDP_TLV_ADDRESS_LIST:
+ TLV_TCHECK(LDP_TLV_ADDRESS_LIST_AFNUM_LEN);
+ af = EXTRACT_16BITS(tptr);
+ tptr+=LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
+ tlv_tlen -= LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
+ printf("\n\t Address Family: %s, addresses",
+ tok2str(af_values, "Unknown (%u)", af));
+ switch (af) {
+ case AFNUM_INET:
+ while(tlv_tlen >= sizeof(struct in_addr)) {
+ TCHECK2(*tptr, sizeof(struct in_addr));
+ printf(" %s",ipaddr_string(tptr));
+ tlv_tlen-=sizeof(struct in_addr);
+ tptr+=sizeof(struct in_addr);
+ }
+ break;
+#ifdef INET6
+ case AFNUM_INET6:
+ while(tlv_tlen >= sizeof(struct in6_addr)) {
+ TCHECK2(*tptr, sizeof(struct in6_addr));
+ printf(" %s",ip6addr_string(tptr));
+ tlv_tlen-=sizeof(struct in6_addr);
+ tptr+=sizeof(struct in6_addr);
+ }
+ break;
+#endif
+ default:
+ /* unknown AF */
+ break;
+ }
+ break;
+
+ case LDP_TLV_COMMON_SESSION:
+ TLV_TCHECK(8);
+ printf("\n\t Version: %u, Keepalive: %us, Flags: [Downstream %s, Loop Detection %s]",
+ EXTRACT_16BITS(tptr), EXTRACT_16BITS(tptr+2),
+ (EXTRACT_16BITS(tptr+6)&0x8000) ? "On Demand" : "Unsolicited",
+ (EXTRACT_16BITS(tptr+6)&0x4000) ? "Enabled" : "Disabled"
+ );
+ break;
+
+ case LDP_TLV_FEC:
+ TLV_TCHECK(1);
+ fec_type = *tptr;
+ printf("\n\t %s FEC (0x%02x)",
+ tok2str(ldp_fec_values, "Unknown", fec_type),
+ fec_type);
+
+ tptr+=1;
+ tlv_tlen-=1;
+ switch(fec_type) {
+
+ case LDP_FEC_WILDCARD:
+ break;
+ case LDP_FEC_PREFIX:
+ TLV_TCHECK(2);
+ af = EXTRACT_16BITS(tptr);
+ tptr+=LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
+ tlv_tlen-=LDP_TLV_ADDRESS_LIST_AFNUM_LEN;
+ if (af == AFNUM_INET) {
+ i=decode_prefix4(tptr,tlv_tlen,buf,sizeof(buf));
+ if (i == -2)
+ goto trunc;
+ if (i == -3)
+ printf(": IPv4 prefix (goes past end of TLV)");
+ else if (i == -1)
+ printf(": IPv4 prefix (invalid length)");
+ else
+ printf(": IPv4 prefix %s",buf);
+ }
+#ifdef INET6
+ else if (af == AFNUM_INET6) {
+ i=decode_prefix6(tptr,tlv_tlen,buf,sizeof(buf));
+ if (i == -2)
+ goto trunc;
+ if (i == -3)
+ printf(": IPv4 prefix (goes past end of TLV)");
+ else if (i == -1)
+ printf(": IPv6 prefix (invalid length)");
+ else
+ printf(": IPv6 prefix %s",buf);
+ }
+#endif
+ else
+ printf(": Address family %u prefix", af);
+ break;
+ case LDP_FEC_HOSTADDRESS:
+ break;
+ case LDP_FEC_MARTINI_VC:
+ /*
+ * According to RFC 4908, the VC info Length field can be zero,
+ * in which case not only are there no interface parameters,
+ * there's no VC ID.
+ */
+ TLV_TCHECK(7);
+ vc_info_len = *(tptr+2);
+
+ if (vc_info_len == 0) {
+ printf(": %s, %scontrol word, group-ID %u, VC-info-length: %u",
+ tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
+ EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
+ EXTRACT_32BITS(tptr+3),
+ vc_info_len);
+ break;
+ }
+
+ /* Make sure we have the VC ID as well */
+ TLV_TCHECK(11);
+ printf(": %s, %scontrol word, group-ID %u, VC-ID %u, VC-info-length: %u",
+ tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),
+ EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",
+ EXTRACT_32BITS(tptr+3),
+ EXTRACT_32BITS(tptr+7),
+ vc_info_len);
+ if (vc_info_len < 4)
+ goto trunc; /* minimum 4, for the VC ID */
+ vc_info_len -= 4; /* subtract out the VC ID, giving the length of the interface parameters */
+
+ /* Skip past the fixed information and the VC ID */
+ tptr+=11;
+ tlv_tlen-=11;
+ TLV_TCHECK(vc_info_len);
+
+ while (vc_info_len > 2) {
+ vc_info_tlv_type = *tptr;
+ vc_info_tlv_len = *(tptr+1);
+ if (vc_info_tlv_len < 2)
+ break;
+ if (vc_info_len < vc_info_tlv_len)
+ break;
+
+ printf("\n\t\tInterface Parameter: %s (0x%02x), len %u",
+ tok2str(ldp_fec_martini_ifparm_values,"Unknown",vc_info_tlv_type),
+ vc_info_tlv_type,
+ vc_info_tlv_len);
+
+ switch(vc_info_tlv_type) {
+ case LDP_FEC_MARTINI_IFPARM_MTU:
+ printf(": %u",EXTRACT_16BITS(tptr+2));
+ break;
+
+ case LDP_FEC_MARTINI_IFPARM_DESC:
+ printf(": ");
+ for (idx = 2; idx < vc_info_tlv_len; idx++)
+ safeputchar(*(tptr+idx));
+ break;
+
+ case LDP_FEC_MARTINI_IFPARM_VCCV:
+ printf("\n\t\t Control Channels (0x%02x) = [%s]",
+ *(tptr+2),
+ bittok2str(ldp_fec_martini_ifparm_vccv_cc_values,"none",*(tptr+2)));
+ printf("\n\t\t CV Types (0x%02x) = [%s]",
+ *(tptr+3),
+ bittok2str(ldp_fec_martini_ifparm_vccv_cv_values,"none",*(tptr+3)));
+ break;
+
+ default:
+ print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
+ break;
+ }
+
+ vc_info_len -= vc_info_tlv_len;
+ tptr += vc_info_tlv_len;
+ }
+ break;
+ }
+
+ break;
+
+ case LDP_TLV_GENERIC_LABEL:
+ TLV_TCHECK(4);
+ printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
+ break;
+
+ case LDP_TLV_STATUS:
+ TLV_TCHECK(8);
+ ui = EXTRACT_32BITS(tptr);
+ tptr+=4;
+ printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
+ ui&0x3fffffff,
+ ui&0x80000000 ? "Fatal error" : "Advisory Notification",
+ ui&0x40000000 ? "do" : "don't");
+ ui = EXTRACT_32BITS(tptr);
+ tptr+=4;
+ if (ui)
+ printf(", causing Message ID: 0x%08x", ui);
+ break;
+
+ case LDP_TLV_FT_SESSION:
+ TLV_TCHECK(8);
+ ft_flags = EXTRACT_16BITS(tptr);
+ printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
+ ft_flags&0x8000 ? "" : "No ",
+ ft_flags&0x8 ? "" : "Don't ",
+ ft_flags&0x4 ? "" : "No ",
+ ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
+ ft_flags&0x1 ? "" : "Don't ");
+ tptr+=4;
+ ui = EXTRACT_32BITS(tptr);
+ if (ui)
+ printf(", Reconnect Timeout: %ums", ui);
+ tptr+=4;
+ ui = EXTRACT_32BITS(tptr);
+ if (ui)
+ printf(", Recovery Time: %ums", ui);
+ break;
+
+ case LDP_TLV_MTU:
+ TLV_TCHECK(2);
+ printf("\n\t MTU: %u", EXTRACT_16BITS(tptr));
+ break;
+
+
/*
* FIXME those are the defined TLVs that lack a decoder
* you are welcome to contribute code ;-)
*/
- case LDP_TLV_FEC:
- case LDP_TLV_ADDRESS_LIST:
case LDP_TLV_HOP_COUNT:
case LDP_TLV_PATH_VECTOR:
- case LDP_TLV_GENERIC_LABEL:
case LDP_TLV_ATM_LABEL:
case LDP_TLV_FR_LABEL:
- case LDP_TLV_STATUS:
case LDP_TLV_EXTD_STATUS:
case LDP_TLV_RETURNED_PDU:
case LDP_TLV_RETURNED_MSG:
- case LDP_TLV_COMMON_SESSION:
case LDP_TLV_ATM_SESSION_PARM:
case LDP_TLV_FR_SESSION_PARM:
case LDP_TLV_LABEL_REQUEST_MSG_ID:
break;
}
return(tlv_len+4); /* Type & Length fields not included */
+
+trunc:
+ printf("\n\t\t packet exceeded snapshot");
+ return 0;
+
+badtlv:
+ printf("\n\t\t TLV contents go past end of TLV");
+ return(tlv_len+4); /* Type & Length fields not included */
}
void
ldp_print(register const u_char *pptr, register u_int len) {
+ int processed;
+ while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {
+ processed = ldp_msg_print(pptr);
+ if (processed == 0)
+ return;
+ len -= processed;
+ pptr += processed;
+ }
+}
+
+
+int
+ldp_msg_print(register const u_char *pptr) {
+
const struct ldp_common_header *ldp_com_header;
const struct ldp_msg_header *ldp_msg_header;
const u_char *tptr,*msg_tptr;
u_short tlen;
- u_short msg_len,msg_type,msg_tlen;
+ u_short pdu_len,msg_len,msg_type,msg_tlen;
int hexdump,processed;
tptr=pptr;
* Sanity checking of the header.
*/
if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
- printf("LDP version %u packet not supported",
+ printf("%sLDP version %u packet not supported",
+ (vflag < 1) ? "" : "\n\t",
EXTRACT_16BITS(&ldp_com_header->version));
- return;
+ return 0;
}
/* print the LSR-ID, label-space & length */
- printf("%sLDP, Label-Space-ID: %s:%u, length: %u",
+ pdu_len = EXTRACT_16BITS(&ldp_com_header->pdu_length);
+ printf("%sLDP, Label-Space-ID: %s:%u, pdu-length: %u",
(vflag < 1) ? "" : "\n\t",
ipaddr_string(&ldp_com_header->lsr_id),
EXTRACT_16BITS(&ldp_com_header->label_space),
- len);
+ pdu_len);
/* bail out if non-verbose */
if (vflag < 1)
- return;
+ return 0;
/* ok they seem to want to know everything - lets fully decode it */
- tlen=EXTRACT_16BITS(ldp_com_header->pdu_length);
+ tlen=pdu_len;
- tptr+=sizeof(const struct ldp_common_header);
- tlen-=sizeof(const struct ldp_common_header);
+ tptr += sizeof(const struct ldp_common_header);
+ tlen -= sizeof(const struct ldp_common_header)-4; /* Type & Length fields not included */
while(tlen>0) {
/* did we capture enough for fully decoding the msg header ? */
- if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
- goto trunc;
+ TCHECK2(*tptr, sizeof(struct ldp_msg_header));
ldp_msg_header = (const struct ldp_msg_header *)tptr;
msg_len=EXTRACT_16BITS(ldp_msg_header->length);
EXTRACT_32BITS(&ldp_msg_header->id),
LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore");
+ if (msg_len == 0) /* infinite loop protection */
+ return 0;
+
msg_tptr=tptr+sizeof(struct ldp_msg_header);
msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
/* did we capture enough for fully decoding the message ? */
- if (!TTEST2(*tptr, msg_len))
- goto trunc;
+ TCHECK2(*tptr, msg_len);
hexdump=FALSE;
switch(msg_type) {
+ case LDP_MSG_NOTIF:
case LDP_MSG_HELLO:
+ case LDP_MSG_INIT:
+ case LDP_MSG_KEEPALIVE:
+ case LDP_MSG_ADDRESS:
+ case LDP_MSG_LABEL_MAPPING:
+ case LDP_MSG_ADDRESS_WITHDRAW:
+ case LDP_MSG_LABEL_WITHDRAW:
while(msg_tlen >= 4) {
processed = ldp_tlv_print(msg_tptr);
if (processed == 0)
* you are welcome to contribute code ;-)
*/
- case LDP_MSG_NOTIF:
- case LDP_MSG_INIT:
- case LDP_MSG_KEEPALIVE:
- case LDP_MSG_ADDRESS:
- case LDP_MSG_ADDRESS_WITHDRAW:
- case LDP_MSG_LABEL_MAPPING:
case LDP_MSG_LABEL_REQUEST:
- case LDP_MSG_LABEL_WITHDRAW:
case LDP_MSG_LABEL_RELEASE:
case LDP_MSG_LABEL_ABORT_REQUEST:
default:
if (vflag <= 1)
- print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
+ print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
break;
}
/* do we want to see an additionally hexdump ? */
if (vflag > 1 || hexdump==TRUE)
- print_unknown_data(tptr+sizeof(sizeof(struct ldp_msg_header)),"\n\t ",
- msg_len-sizeof(struct ldp_msg_header));
+ print_unknown_data(tptr+sizeof(struct ldp_msg_header),"\n\t ",
+ msg_len);
- tptr+=msg_len;
- tlen-=msg_len;
+ tptr += msg_len+4;
+ tlen -= msg_len+4;
}
- return;
+ return pdu_len+4;
trunc:
printf("\n\t\t packet exceeded snapshot");
+ return 0;
}
projects / tcpdump / blobdiff