The Tcpdump Group git mirrors - tcpdump/blobdiff

* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

* FOR A PARTICULAR PURPOSE.

*

* 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)

* and Steinar Haug ([email protected])

*/

* and Steinar Haug ([email protected])

*/

-#ifndef lint

-static const char rcsid[] _U_ =

- "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.8 2004-06-15 09:42:42 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 "extract.h"

#include "addrtoname.h"

#include "l2vpn.h"

+#include "af.h"

+

/*

* ldp common header

/*

* ldp common header

*/

struct 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

};

#define LDP_VERSION 1

*/

struct ldp_msg_header {

*/

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

#define LDP_MSG_NOTIF 0x0001

#define LDP_MSG_HELLO 0x0100

{ LDP_MSG_INIT, "Initialization" },

{ LDP_MSG_KEEPALIVE, "Keepalive" },

{ LDP_MSG_ADDRESS, "Address" },

{ 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" },

{ LDP_MSG_LABEL_MAPPING, "Label Mapping" },

{ LDP_MSG_LABEL_REQUEST, "Label Request" },

{ LDP_MSG_LABEL_WITHDRAW, "Label Withdraw" },

{ 0, NULL}

};

{ 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_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_HOP_COUNT 0x0103

#define LDP_TLV_PATH_VECTOR 0x0104

#define LDP_TLV_GENERIC_LABEL 0x0200

#define LDP_TLV_FR_SESSION_PARM 0x0502

#define LDP_TLV_FT_SESSION 0x0503

#define LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600

#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" },

static const struct tok ldp_tlv_values[] = {

{ LDP_TLV_FEC, "FEC" },

{ 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_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

{ 0, NULL}

};

#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[] = {

#define LDP_FEC_MARTINI_VC 0x80

static const struct tok ldp_fec_values[] = {

{ 0, NULL}

};

{ 0, NULL}

};

-/* RFC1700 address family numbers, same definition in print-bgp.c */

-#define AFNUM_INET 1

-#define AFNUM_INET6 2

+#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}

+};

-#define FALSE 0

-#define TRUE 1

+static u_int ldp_pdu_print(netdissect_options *, const u_char *);

-int ldp_tlv_print(register const u_char *);

-

-/*

+/*

* ldp tlv header

*

* 0 1 2 3

* 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;

u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;

u_char fec_type;

};

const struct ldp_tlv_header *ldp_tlv_header;

u_short tlv_type,tlv_len,tlv_tlen,af,ft_flags;

u_char fec_type;

- u_int ui;

+ u_int ui,vc_info_len, vc_info_tlv_type, vc_info_tlv_len,idx;

char buf[100];

int i;

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,

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:

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:

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:

break;

case LDP_TLV_ADDRESS_LIST:

- af = EXTRACT_16BITS(tptr);

- tptr+=2;

- printf("\n\t Adress Family: ");

- if (af == AFNUM_INET) {

- printf("IPv4, addresses:");

- for (i=0; i<(tlv_tlen-2)/4; i++) {

- printf(" %s",ipaddr_string(tptr));

- tptr+=4;

+ 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;

+ ND_PRINT("\n\t Address Family: %s, addresses",

+ tok2str(af_values, "Unknown (%u)", af));

+ switch (af) {

+ case AFNUM_INET:

+ while(tlv_tlen >= sizeof(nd_ipv4)) {

+ ND_PRINT(" %s", GET_IPADDR_STRING(tptr));

+ tlv_tlen-=sizeof(nd_ipv4);

+ tptr+=sizeof(nd_ipv4);

}

- }

-#ifdef INET6

- else if (af == AFNUM_INET6) {

- printf("IPv6, addresses:");

- for (i=0; i<(tlv_tlen-2)/16; i++) {

- printf(" %s",ip6addr_string(tptr));

- tptr+=16;

+ break;

+ case AFNUM_INET6:

+ while(tlv_tlen >= sizeof(nd_ipv6)) {

+ ND_PRINT(" %s", GET_IP6ADDR_STRING(tptr));

+ tlv_tlen-=sizeof(nd_ipv6);

+ tptr+=sizeof(nd_ipv6);

}

- }

-#endif

+ break;

+ default:

+ /* unknown AF */

+ break;

+ }

break;

case LDP_TLV_COMMON_SESSION:

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:

);

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;

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:

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;

+ tlv_tlen-=2;

if (af == AFNUM_INET) {

- i=decode_prefix4(tptr,buf,sizeof(buf));

- printf(": IPv4 prefix %s",buf);

+ 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);

}

-#ifdef INET6

else if (af == AFNUM_INET6) {

- i=decode_prefix6(tptr,buf,sizeof(buf));

- printf(": IPv6 prefix %s",buf);

+ 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);

}

-#endif

+ else

+ ND_PRINT(": Address family %u prefix", af);

break;

case LDP_FEC_HOSTADDRESS:

break;

case LDP_FEC_MARTINI_VC:

break;

case LDP_FEC_HOSTADDRESS:

break;

case LDP_FEC_MARTINI_VC:

- printf(": %s, %scontrol word, VC %u",

- tok2str(l2vpn_encaps_values, "Unknown", EXTRACT_16BITS(tptr)&0x7fff),

- EXTRACT_16BITS(tptr)&0x8000 ? "" : "no ",

- EXTRACT_32BITS(tptr+7));

+ /*

+ * 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;

+ tlv_tlen-=11;

+ TLV_TCHECK(vc_info_len);

+

+ while (vc_info_len > 2) {

+ 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;

+

+ 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:

+ ND_PRINT(": %u", GET_BE_U_2(tptr + 2));

+ break;

+

+ 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));

+ break;

+

+ case LDP_FEC_MARTINI_IFPARM_VCCV:

+ 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(ndo, 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:

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:

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&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)

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:

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 ");

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:

+ TLV_TCHECK(2);

+ ND_PRINT("\n\t MTU: %u", GET_BE_U_2(tptr));

break;

case LDP_TLV_LABEL_REQUEST_MSG_ID:

default:

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 */

break;

}

return(tlv_len+4); /* Type & Length fields not included */

+

+trunc:

+ nd_trunc_longjmp(ndo);

+

+invalid:

+ return(tlv_len+4); /* Type & Length fields not included */

}

void

}

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;

+

+ ndo->ndo_protocol = "ldp";

+ while (len > (sizeof(struct ldp_common_header) + sizeof(struct ldp_msg_header))) {

+ 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;

+ }

+}

+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;

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;

+ 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.

*/

/*

* Sanity checking of the header.

*/

- if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {

- printf("LDP version %u packet not supported",

- EXTRACT_16BITS(&ldp_com_header->version));

- return;

+ 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 */

}

/* print the LSR-ID, label-space & length */

- printf("%sLDP, Label-Space-ID: %s:%u, length: %u",

- (vflag < 1) ? "" : "\n\t",

- ipaddr_string(&ldp_com_header->lsr_id),

- EXTRACT_16BITS(&ldp_com_header->label_space),

- len);

+ 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)

- return;

+ /* 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=EXTRACT_16BITS(ldp_com_header->pdu_length);

-

- 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 ? */

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,

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");

+ 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) {

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_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);

+ processed = ldp_tlv_print(ndo, msg_tptr, msg_tlen);

if (processed == 0)

break;

msg_tlen-=processed;

if (processed == 0)

break;

msg_tlen-=processed;

* you are welcome to contribute code ;-)

*/

* you are welcome to contribute code ;-)

*/

- case LDP_MSG_ADDRESS_WITHDRAW:

case LDP_MSG_LABEL_REQUEST:

- case LDP_MSG_LABEL_WITHDRAW:

case LDP_MSG_LABEL_RELEASE:

case LDP_MSG_LABEL_ABORT_REQUEST:

default:

case LDP_MSG_LABEL_RELEASE:

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 ? */

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;

tlen -= msg_len+4;

}

msg_len);

tptr += msg_len+4;

tlen -= msg_len+4;

}

- return;

+ return pdu_len+4;

trunc:

- printf("\n\t\t packet exceeded snapshot");

+ nd_trunc_longjmp(ndo);

}

-