* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
- * Original code by Hannes Gredler (hannes@juniper.net)
+ * Original code by Hannes Gredler (hannes@gredler.at)
*/
-#ifndef lint
-static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.20 2006-06-23 02:03:09 hannes Exp $";
-#endif
+/* \summary: Label Distribution Protocol (LDP) printer */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include "netdissect-stdinc.h"
-#include "interface.h"
-#include "decode_prefix.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
#include "l2vpn.h"
#include "af.h"
+
/*
* ldp common header
*
*/
struct ldp_common_header {
- u_int8_t version[2];
- u_int8_t pdu_length[2];
- u_int8_t lsr_id[4];
- u_int8_t label_space[2];
+ nd_uint16_t version;
+ nd_uint16_t pdu_length;
+ nd_ipv4 lsr_id;
+ nd_uint16_t label_space;
};
#define LDP_VERSION 1
*/
struct ldp_msg_header {
- u_int8_t type[2];
- u_int8_t length[2];
- u_int8_t id[4];
+ nd_uint16_t type;
+ nd_uint16_t length;
+ nd_uint32_t id;
};
-#define LDP_MASK_MSG_TYPE(x) ((x)&0x7fff)
-#define LDP_MASK_U_BIT(x) ((x)&0x8000)
+#define LDP_MASK_MSG_TYPE(x) ((x)&0x7fff)
+#define LDP_MASK_U_BIT(x) ((x)&0x8000)
#define LDP_MSG_NOTIF 0x0001
#define LDP_MSG_HELLO 0x0100
{ 0, NULL}
};
-#define LDP_MASK_TLV_TYPE(x) ((x)&0x3fff)
-#define LDP_MASK_F_BIT(x) ((x)&0x4000)
+#define LDP_MASK_TLV_TYPE(x) ((x)&0x3fff)
+#define LDP_MASK_F_BIT(x) ((x)&0x4000)
#define LDP_TLV_FEC 0x0100
#define LDP_TLV_ADDRESS_LIST 0x0101
#define LDP_FEC_WILDCARD 0x01
#define LDP_FEC_PREFIX 0x02
#define LDP_FEC_HOSTADDRESS 0x03
-/* From draft-martini-l2circuit-trans-mpls-13.txt */
+/* 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[] = {
{ 0, NULL}
};
-int ldp_msg_print(register const u_char *);
-int ldp_tlv_print(register const u_char *);
-
-/*
+static u_int ldp_pdu_print(netdissect_options *, const u_char *);
+
+/*
* ldp tlv header
*
* 0 1 2 3
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
-int
-ldp_tlv_print(register const u_char *tptr) {
+#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,
+ u_int msg_tlen)
+{
struct ldp_tlv_header {
- u_int8_t type[2];
- u_int8_t length[2];
+ nd_uint16_t type;
+ nd_uint16_t length;
};
const struct ldp_tlv_header *ldp_tlv_header;
char buf[100];
int i;
- ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
- tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
+ ldp_tlv_header = (const struct ldp_tlv_header *)tptr;
+ ND_TCHECK_SIZE(ldp_tlv_header);
+ tlv_len=GET_BE_U_2(ldp_tlv_header->length);
+ if (tlv_len + 4U > msg_tlen) {
+ ND_PRINT("\n\t\t TLV contents go past end of message");
+ return 0;
+ }
tlv_tlen=tlv_len;
- tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
+ tlv_type=LDP_MASK_TLV_TYPE(GET_BE_U_2(ldp_tlv_header->type));
/* FIXME vendor private / experimental check */
- printf("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
+ ND_PRINT("\n\t %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
tok2str(ldp_tlv_values,
"Unknown",
tlv_type),
tlv_type,
tlv_len,
- LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
- LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
+ LDP_MASK_U_BIT(GET_BE_U_2(ldp_tlv_header->type)) ? "continue processing" : "ignore",
+ LDP_MASK_F_BIT(GET_BE_U_2(ldp_tlv_header->type)) ? "do" : "don't");
tptr+=sizeof(struct ldp_tlv_header);
switch(tlv_type) {
case LDP_TLV_COMMON_HELLO:
- 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 targeted Hellos" : "");
+ TLV_TCHECK(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",
+ (GET_BE_U_2(tptr + 2)&0x4000) ? ", Request for targeted Hellos" : "");
break;
case LDP_TLV_IPV4_TRANSPORT_ADDR:
- printf("\n\t IPv4 Transport Address: %s", ipaddr_string(tptr));
+ TLV_TCHECK(4);
+ ND_PRINT("\n\t IPv4 Transport Address: %s", GET_IPADDR_STRING(tptr));
break;
-#ifdef INET6
case LDP_TLV_IPV6_TRANSPORT_ADDR:
- printf("\n\t IPv6 Transport Address: %s", ip6addr_string(tptr));
+ TLV_TCHECK(16);
+ ND_PRINT("\n\t IPv6 Transport Address: %s", GET_IP6ADDR_STRING(tptr));
break;
-#endif
case LDP_TLV_CONFIG_SEQ_NUMBER:
- printf("\n\t Sequence Number: %u", EXTRACT_32BITS(tptr));
+ TLV_TCHECK(4);
+ ND_PRINT("\n\t Sequence Number: %u", GET_BE_U_4(tptr));
break;
case LDP_TLV_ADDRESS_LIST:
- af = EXTRACT_16BITS(tptr);
+ TLV_TCHECK(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;
- printf("\n\t Address Family: %s, addresses",
+ ND_PRINT("\n\t Address Family: %s, addresses",
tok2str(af_values, "Unknown (%u)", af));
switch (af) {
- case AFNUM_INET:
- while(tlv_tlen >= sizeof(struct in_addr)) {
- printf(" %s",ipaddr_string(tptr));
- tlv_tlen-=sizeof(struct in_addr);
- tptr+=sizeof(struct in_addr);
+ case AFNUM_IP:
+ while(tlv_tlen >= sizeof(nd_ipv4)) {
+ ND_PRINT(" %s", GET_IPADDR_STRING(tptr));
+ tlv_tlen-=sizeof(nd_ipv4);
+ tptr+=sizeof(nd_ipv4);
}
break;
-#ifdef INET6
- case AFNUM_INET6:
- while(tlv_tlen >= sizeof(struct in6_addr)) {
- printf(" %s",ip6addr_string(tptr));
- tlv_tlen-=sizeof(struct in6_addr);
- tptr+=sizeof(struct in6_addr);
+ case AFNUM_IP6:
+ while(tlv_tlen >= sizeof(nd_ipv6)) {
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tptr));
+ tlv_tlen-=sizeof(nd_ipv6);
+ tptr+=sizeof(nd_ipv6);
}
break;
-#endif
default:
/* unknown AF */
break;
break;
case LDP_TLV_COMMON_SESSION:
- 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"
+ TLV_TCHECK(8);
+ 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 + 6)&0x8000) ? "On Demand" : "Unsolicited",
+ (GET_BE_U_2(tptr + 6)&0x4000) ? "Enabled" : "Disabled"
);
break;
case LDP_TLV_FEC:
- fec_type = *tptr;
- printf("\n\t %s FEC (0x%02x)",
+ TLV_TCHECK(1);
+ fec_type = GET_U_1(tptr);
+ ND_PRINT("\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:
- af = EXTRACT_16BITS(tptr);
+ TLV_TCHECK(2);
+ af = GET_BE_U_2(tptr);
tptr+=2;
- if (af == AFNUM_INET) {
- i=decode_prefix4(tptr,buf,sizeof(buf));
- printf(": IPv4 prefix %s",buf);
- }
-#ifdef INET6
- else if (af == AFNUM_INET6) {
- i=decode_prefix6(tptr,buf,sizeof(buf));
- printf(": IPv6 prefix %s",buf);
- }
-#endif
+ tlv_tlen-=2;
+ if (af == AFNUM_IP) {
+ i=decode_prefix4(ndo, tptr, tlv_tlen, buf, sizeof(buf));
+ if (i == -2)
+ goto trunc;
+ if (i == -3)
+ ND_PRINT(": IPv4 prefix (goes past end of TLV)");
+ else if (i == -1)
+ ND_PRINT(": IPv4 prefix (invalid length)");
+ else
+ ND_PRINT(": IPv4 prefix %s", buf);
+ } else if (af == AFNUM_IP6) {
+ i=decode_prefix6(ndo, tptr, tlv_tlen, buf, sizeof(buf));
+ if (i == -2)
+ goto trunc;
+ if (i == -3)
+ ND_PRINT(": IPv4 prefix (goes past end of TLV)");
+ else if (i == -1)
+ ND_PRINT(": IPv6 prefix (invalid length)");
+ else
+ ND_PRINT(": IPv6 prefix %s", buf);
+ } else
+ ND_PRINT(": Address family %u prefix", af);
break;
case LDP_FEC_HOSTADDRESS:
break;
case LDP_FEC_MARTINI_VC:
- if (!TTEST2(*tptr, 11))
- goto trunc;
- vc_info_len = *(tptr+2);
-
- 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 == 0) /* infinite loop protection */
+ /*
+ * We assume the type was supposed to be one of the MPLS
+ * Pseudowire Types.
+ */
+ TLV_TCHECK(7);
+ vc_info_len = GET_U_1(tptr + 2);
+
+ /*
+ * 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.
+ */
+ if (vc_info_len == 0) {
+ ND_PRINT(": %s, %scontrol word, group-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 ",
+ GET_BE_U_4(tptr + 3),
+ vc_info_len);
break;
+ }
+
+ /* Make sure we have the VC ID as well */
+ TLV_TCHECK(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 ",
+ GET_BE_U_4(tptr + 3),
+ GET_BE_U_4(tptr + 7),
+ vc_info_len);
+ if (vc_info_len < 4) {
+ /* minimum 4, for the VC ID */
+ ND_PRINT(" (invalid, < 4");
+ return(tlv_len+4); /* Type & Length fields not included */
+ }
+ 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;
- if (!TTEST2(*tptr, vc_info_len))
- goto trunc;
+ tlv_tlen-=11;
+ TLV_TCHECK(vc_info_len);
while (vc_info_len > 2) {
- vc_info_tlv_type = *tptr;
- vc_info_tlv_len = *(tptr+1);
+ vc_info_tlv_type = GET_U_1(tptr);
+ vc_info_tlv_len = GET_U_1(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",
+ ND_PRINT("\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));
+ ND_PRINT(": %u", GET_BE_U_2(tptr + 2));
break;
case LDP_FEC_MARTINI_IFPARM_DESC:
- printf(": ");
+ ND_PRINT(": ");
for (idx = 2; idx < vc_info_tlv_len; idx++)
- safeputchar(*(tptr+idx));
+ fn_print_char(ndo, GET_U_1(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)));
+ ND_PRINT("\n\t\t Control Channels (0x%02x) = [%s]",
+ GET_U_1((tptr + 2)),
+ bittok2str(ldp_fec_martini_ifparm_vccv_cc_values, "none", GET_U_1((tptr + 2))));
+ ND_PRINT("\n\t\t CV Types (0x%02x) = [%s]",
+ GET_U_1((tptr + 3)),
+ bittok2str(ldp_fec_martini_ifparm_vccv_cv_values, "none", GET_U_1((tptr + 3))));
break;
default:
- print_unknown_data(tptr+2,"\n\t\t ",vc_info_tlv_len-2);
+ print_unknown_data(ndo, tptr+2, "\n\t\t ", vc_info_tlv_len-2);
break;
}
break;
case LDP_TLV_GENERIC_LABEL:
- printf("\n\t Label: %u", EXTRACT_32BITS(tptr) & 0xfffff);
+ TLV_TCHECK(4);
+ ND_PRINT("\n\t Label: %u", GET_BE_U_4(tptr) & 0xfffff);
break;
case LDP_TLV_STATUS:
- ui = EXTRACT_32BITS(tptr);
+ TLV_TCHECK(8);
+ ui = GET_BE_U_4(tptr);
tptr+=4;
- printf("\n\t Status: 0x%02x, Flags: [%s and %s forward]",
+ 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");
- ui = EXTRACT_32BITS(tptr);
+ ui = GET_BE_U_4(tptr);
tptr+=4;
if (ui)
- printf(", causing Message ID: 0x%08x", ui);
+ ND_PRINT(", causing Message ID: 0x%08x", ui);
break;
case LDP_TLV_FT_SESSION:
- ft_flags = EXTRACT_16BITS(tptr);
- printf("\n\t Flags: [%sReconnect, %sSave State, %sAll-Label Protection, %s Checkpoint, %sRe-Learn State]",
+ TLV_TCHECK(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 ",
ft_flags&0x8 ? "" : "Don't ",
ft_flags&0x4 ? "" : "No ",
ft_flags&0x2 ? "Sequence Numbered Label" : "All Labels",
ft_flags&0x1 ? "" : "Don't ");
+ /* 16 bits (FT Flags) + 16 bits (Reserved) */
tptr+=4;
- ui = EXTRACT_32BITS(tptr);
+ ui = GET_BE_U_4(tptr);
if (ui)
- printf(", Reconnect Timeout: %ums", ui);
+ ND_PRINT(", Reconnect Timeout: %ums", ui);
tptr+=4;
- ui = EXTRACT_32BITS(tptr);
+ ui = GET_BE_U_4(tptr);
if (ui)
- printf(", Recovery Time: %ums", ui);
+ ND_PRINT(", Recovery Time: %ums", ui);
break;
case LDP_TLV_MTU:
- printf("\n\t MTU: %u", EXTRACT_16BITS(tptr));
+ TLV_TCHECK(2);
+ ND_PRINT("\n\t MTU: %u", GET_BE_U_2(tptr));
break;
case LDP_TLV_LABEL_REQUEST_MSG_ID:
default:
- if (vflag <= 1)
- print_unknown_data(tptr,"\n\t ",tlv_tlen);
+ if (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, tptr, "\n\t ", tlv_tlen);
break;
}
return(tlv_len+4); /* Type & Length fields not included */
-
+
trunc:
- printf("\n\t\t packet exceeded snapshot");
- return 0;
+ nd_trunc_longjmp(ndo);
+
+invalid:
+ return(tlv_len+4); /* Type & Length fields not included */
}
void
-ldp_print(register const u_char *pptr, register u_int len) {
+ldp_print(netdissect_options *ndo,
+ const u_char *pptr, u_int len)
+{
+ u_int processed;
- int processed;
+ ndo->ndo_protocol = "ldp";
while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {
- processed = ldp_msg_print(pptr);
+ processed = ldp_pdu_print(ndo, pptr);
if (processed == 0)
return;
+ if (len < processed) {
+ ND_PRINT(" [remaining length %u < %u]", len, processed);
+ nd_print_invalid(ndo);
+ break;
+ }
len -= processed;
pptr += processed;
}
}
-
-int
-ldp_msg_print(register const u_char *pptr) {
-
+static u_int
+ldp_pdu_print(netdissect_options *ndo,
+ 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 pdu_len,msg_len,msg_type,msg_tlen;
+ u_short pdu_len,msg_len,msg_type;
+ u_int msg_tlen;
int hexdump,processed;
- tptr=pptr;
ldp_com_header = (const struct ldp_common_header *)pptr;
- TCHECK(*ldp_com_header);
+ ND_TCHECK_SIZE(ldp_com_header);
/*
* Sanity checking of the header.
*/
- if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
- printf("%sLDP version %u packet not supported",
- (vflag < 1) ? "" : "\n\t",
- EXTRACT_16BITS(&ldp_com_header->version));
+ if (GET_BE_U_2(ldp_com_header->version) != LDP_VERSION) {
+ ND_PRINT("%sLDP version %u packet not supported",
+ (ndo->ndo_vflag < 1) ? "" : "\n\t",
+ GET_BE_U_2(ldp_com_header->version));
return 0;
}
+ pdu_len = GET_BE_U_2(ldp_com_header->pdu_length);
+ if (pdu_len < sizeof(struct ldp_common_header)-4) {
+ /* length too short */
+ ND_PRINT("%sLDP, pdu-length: %u (too short, < %zu)",
+ (ndo->ndo_vflag < 1) ? "" : "\n\t",
+ pdu_len,
+ sizeof(struct ldp_common_header)-4);
+ return 0;
+ }
+
/* print the LSR-ID, label-space & length */
- 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),
+ ND_PRINT("%sLDP, Label-Space-ID: %s:%u, pdu-length: %u",
+ (ndo->ndo_vflag < 1) ? "" : "\n\t",
+ GET_IPADDR_STRING(ldp_com_header->lsr_id),
+ GET_BE_U_2(ldp_com_header->label_space),
pdu_len);
- /* bail out if non-verbose */
- if (vflag < 1)
+ /* bail out if non-verbose */
+ if (ndo->ndo_vflag < 1)
return 0;
/* ok they seem to want to know everything - lets fully decode it */
- tlen=pdu_len;
-
- tptr += sizeof(const struct ldp_common_header);
- tlen -= sizeof(const struct ldp_common_header)-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) {
/* did we capture enough for fully decoding the msg header ? */
- if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
- goto trunc;
+ ND_TCHECK_LEN(tptr, sizeof(struct ldp_msg_header));
ldp_msg_header = (const struct ldp_msg_header *)tptr;
- msg_len=EXTRACT_16BITS(ldp_msg_header->length);
- msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type));
+ msg_len=GET_BE_U_2(ldp_msg_header->length);
+ msg_type=LDP_MASK_MSG_TYPE(GET_BE_U_2(ldp_msg_header->type));
+
+ if (msg_len < sizeof(struct ldp_msg_header)-4) {
+ /* length too short */
+ /* FIXME vendor private / experimental check */
+ ND_PRINT("\n\t %s Message (0x%04x), length: %u (too short, < %zu)",
+ tok2str(ldp_msg_values,
+ "Unknown",
+ msg_type),
+ msg_type,
+ msg_len,
+ sizeof(struct ldp_msg_header)-4);
+ return 0;
+ }
/* FIXME vendor private / experimental check */
- printf("\n\t %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
+ ND_PRINT("\n\t %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
tok2str(ldp_msg_values,
"Unknown",
msg_type),
msg_type,
msg_len,
- 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;
+ GET_BE_U_4(ldp_msg_header->id),
+ LDP_MASK_U_BIT(GET_BE_U_2(ldp_msg_header->type)) ? "continue processing" : "ignore");
msg_tptr=tptr+sizeof(struct ldp_msg_header);
- msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
+ 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;
+ ND_TCHECK_LEN(tptr, msg_len);
hexdump=FALSE;
switch(msg_type) {
-
+
case LDP_MSG_NOTIF:
case LDP_MSG_HELLO:
case LDP_MSG_INIT:
case LDP_MSG_ADDRESS_WITHDRAW:
case LDP_MSG_LABEL_WITHDRAW:
while(msg_tlen >= 4) {
- processed = ldp_tlv_print(msg_tptr);
+ processed = ldp_tlv_print(ndo, msg_tptr, msg_tlen);
if (processed == 0)
break;
msg_tlen-=processed;
case LDP_MSG_LABEL_ABORT_REQUEST:
default:
- if (vflag <= 1)
- print_unknown_data(msg_tptr,"\n\t ",msg_tlen);
+ if (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, 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 ",
+ if (ndo->ndo_vflag > 1 || hexdump==TRUE)
+ print_unknown_data(ndo, tptr+sizeof(struct ldp_msg_header), "\n\t ",
msg_len);
tptr += msg_len+4;
}
return pdu_len+4;
trunc:
- printf("\n\t\t packet exceeded snapshot");
- return 0;
+ nd_trunc_longjmp(ndo);
}
-
projects / tcpdump / blobdiff