#endif
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.53 2002-10-11 13:09:51 hannes Exp $";
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.72.2.5 2005-04-27 18:42:28 hannes Exp $";
#endif
#include <tcpdump-stdinc.h>
u_int8_t bgpn_type;
u_int8_t bgpn_major;
u_int8_t bgpn_minor;
- /* data should follow */
};
#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
} bgpa_len;
#define bgp_attr_len(p) \
(((p)->bgpa_flags & 0x10) ? \
- ntohs((p)->bgpa_len.elen) : (p)->bgpa_len.len)
+ EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len)
#define bgp_attr_off(p) \
(((p)->bgpa_flags & 0x10) ? 4 : 3)
};
{ 0, NULL}
};
+#define BGP_AS_SET 1
+#define BGP_AS_SEQUENCE 2
+#define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
+#define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
+
+static struct tok bgp_as_path_segment_open_values[] = {
+ { BGP_AS_SEQUENCE, ""},
+ { BGP_AS_SET, "{ "},
+ { BGP_CONFED_AS_SEQUENCE, "( "},
+ { BGP_CONFED_AS_SET, "({ "},
+ { 0, NULL}
+};
+
+static struct tok bgp_as_path_segment_close_values[] = {
+ { BGP_AS_SEQUENCE, ""},
+ { BGP_AS_SET, "}"},
+ { BGP_CONFED_AS_SEQUENCE, ")"},
+ { BGP_CONFED_AS_SET, "})"},
+ { 0, NULL}
+};
+
#define BGP_OPT_AUTH 1
#define BGP_OPT_CAP 2
#define BGP_NOTIFY_MAJOR_HOLDTIME 4
#define BGP_NOTIFY_MAJOR_FSM 5
#define BGP_NOTIFY_MAJOR_CEASE 6
+#define BGP_NOTIFY_MAJOR_CAP 7
static struct tok bgp_notify_major_values[] = {
{ BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
{ BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
{ BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
{ BGP_NOTIFY_MAJOR_CEASE, "Cease"},
+ { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
+ { 0, NULL}
+};
+
+/* draft-ietf-idr-cease-subcode-02 */
+#define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
+static struct tok bgp_notify_minor_cease_values[] = {
+ { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
+ { 2, "Administratively Shutdown"},
+ { 3, "Peer Unconfigured"},
+ { 4, "Administratively Reset"},
+ { 5, "Connection Rejected"},
+ { 6, "Other Configuration Change"},
+ { 7, "Connection Collision Resolution"},
{ 0, NULL}
};
{ 0, NULL}
};
+static struct tok bgp_notify_minor_cap_values[] = {
+ { 1, "Invalid Action Value" },
+ { 2, "Invalid Capability Length" },
+ { 3, "Malformed Capability Value" },
+ { 4, "Unsupported Capability Code" },
+ { 0, NULL }
+};
+
static struct tok bgp_origin_values[] = {
{ 0, "IGP"},
{ 1, "EGP"},
#define SAFNUM_VPNUNICAST 128
#define SAFNUM_VPNMULTICAST 129
#define SAFNUM_VPNUNIMULTICAST 130
+/* draft-marques-ppvpn-rt-constrain-01.txt */
+#define SAFNUM_RT_ROUTING_INFO 132
#define BGP_VPN_RD_LEN 8
{ SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
{ SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
{ SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
+ { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
{ 0, NULL }
};
{ 0, NULL},
};
-/* Extended community type - draft-ramachandra-bgp-ext-communities */
+/* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
#define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
+#define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
#define BGP_EXT_COM_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
+#define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,Format AN(4bytes):local(2bytes) */
#define BGP_EXT_COM_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
/* rfc2547 bgp-mpls-vpns */
-#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin */
- /* draft-rosen-vpns-ospf-bgp-mpls */
-#define BGP_EXT_COM_OSPF_RTYPE 0x8000 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
-#define BGP_EXT_COM_OSPF_RID 0x8001 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
+
+#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
+#define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
+#define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
+#define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
+
+#define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
+#define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatability */
+
+#define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
+#define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatability */
+
#define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
+static struct tok bgp_extd_comm_flag_values[] = {
+ { 0x8000, "vendor-specific"},
+ { 0x4000, "non-transitive"},
+ { 0, NULL},
+};
+
static struct tok bgp_extd_comm_subtype_values[] = {
- { BGP_EXT_COM_RT_0, "target"},
- { BGP_EXT_COM_RT_1, "target"},
- { BGP_EXT_COM_RO_0, "origin"},
- { BGP_EXT_COM_RO_1, "origin"},
- { BGP_EXT_COM_LINKBAND, "link-BW"},
- { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
- { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
- { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
- { BGP_EXT_COM_L2INFO, "layer2-info"},
+ { BGP_EXT_COM_RT_0, "target"},
+ { BGP_EXT_COM_RT_1, "target"},
+ { BGP_EXT_COM_RT_2, "target"},
+ { BGP_EXT_COM_RO_0, "origin"},
+ { BGP_EXT_COM_RO_1, "origin"},
+ { BGP_EXT_COM_RO_2, "origin"},
+ { BGP_EXT_COM_LINKBAND, "link-BW"},
+ { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
+ { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
+ { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
+ { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
+ { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
+ { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
+ { BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
+ { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
+ { BGP_EXT_COM_L2INFO, "layer2-info"},
{ 0, NULL},
};
struct in_addr addr;
u_int plen;
+ TCHECK(pptr[0]);
plen = pptr[0];
if (32 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
+ TCHECK2(pptr[1], (plen + 7) / 8);
memcpy(&addr, &pptr[1], (plen + 7) / 8);
if (plen % 8) {
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
}
snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
return 1 + (plen + 7) / 8;
+
+trunc:
+ return -2;
}
static int
struct in_addr addr;
u_int plen;
+ TCHECK(pptr[0]);
plen = pptr[0]; /* get prefix length */
/* this is one of the weirdnesses of rfc3107
return -1;
memset(&addr, 0, sizeof(addr));
+ TCHECK2(pptr[4], (plen + 7) / 8);
memcpy(&addr, &pptr[4], (plen + 7) / 8);
if (plen % 8) {
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 4 + (plen + 7) / 8;
-}
+trunc:
+ return -2;
+}
+/* RDs and RTs share the same semantics
+ * we use bgp_vpn_rd_print for
+ * printing route targets inside a NLRI */
static char *
bgp_vpn_rd_print (const u_char *pptr) {
/* ok lets load the RD format */
switch (EXTRACT_16BITS(pptr)) {
+
/* AS:IP-address fmt*/
case 0:
- pos+=sprintf(pos, "%u:%u.%u.%u.%u",
- EXTRACT_16BITS(pptr+2),
- *(pptr+4),
- *(pptr+5),
- *(pptr+6),
- *(pptr+7));
+ snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u.%u.%u.%u",
+ EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7));
break;
/* IP-address:AS fmt*/
+
case 1:
- pos+=sprintf(pos, "%u.%u.%u.%u:%u",
- *(pptr+2),
- *(pptr+3),
- *(pptr+4),
- *(pptr+5),
- EXTRACT_16BITS(pptr+6));
+ snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
+ *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6));
+ break;
+
+ /* 4-byte-AS:number fmt*/
+ case 2:
+ snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u",
+ EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6));
break;
default:
- pos+=sprintf(pos, "unknown RD format");
+ snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
break;
}
+ pos += strlen(pos);
*(pos) = '\0';
return (rd);
}
+static int
+decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen)
+{
+ u_int8_t route_target[8];
+ u_int plen;
+
+ TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+
+ plen-=32; /* adjust prefix length */
+
+ if (0 < plen)
+ return -1;
+
+ memset(&route_target, 0, sizeof(route_target));
+ TCHECK2(pptr[1], (plen + 7) / 8);
+ memcpy(&route_target, &pptr[1], (plen + 7) / 8);
+ if (plen % 8) {
+ ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ snprintf(buf, buflen, "origin AS: %u, route target %s",
+ EXTRACT_32BITS(pptr+1),
+ bgp_vpn_rd_print((u_char *)&route_target));
+
+ return 5 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
static int
decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
{
struct in_addr addr;
u_int plen;
+ TCHECK(pptr[0]);
plen = pptr[0]; /* get prefix length */
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
return -1;
memset(&addr, 0, sizeof(addr));
+ TCHECK2(pptr[12], (plen + 7) / 8);
memcpy(&addr, &pptr[12], (plen + 7) / 8);
if (plen % 8) {
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 12 + (plen + 7) / 8;
+
+trunc:
+ return -2;
}
static int
decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
{
int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
+
+ TCHECK2(pptr[0], 2);
plen=EXTRACT_16BITS(pptr);
tlen=plen;
pptr+=2;
+ TCHECK2(pptr[0],15);
strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
bgp_vpn_rd_print(pptr),
EXTRACT_16BITS(pptr+8),
/* ok now the variable part - lets read out TLVs*/
while (tlen>0) {
+ if (tlen < 3)
+ return -1;
+ TCHECK2(pptr[0], 3);
tlv_type=*pptr++;
tlv_len=EXTRACT_16BITS(pptr);
ttlv_len=tlv_len;
tlv_len);
ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
while (ttlv_len>0) {
+ TCHECK(pptr[0]);
strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
ttlv_len--;
}
tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
}
return plen+2;
+
+trunc:
+ return -2;
}
#ifdef INET6
struct in6_addr addr;
u_int plen;
+ TCHECK(pd[0]);
plen = pd[0];
- if (plen < 0 || 128 < plen)
+ if (128 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
+ TCHECK2(pd[1], (plen + 7) / 8);
memcpy(&addr, &pd[1], (plen + 7) / 8);
if (plen % 8) {
addr.s6_addr[(plen + 7) / 8 - 1] &=
}
snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
return 1 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
+static int
+decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen)
+{
+ struct in6_addr addr;
+ u_int plen;
+
+ TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+ plen-=24; /* adjust prefixlen - labellength */
+
+ if (128 < plen)
+ return -1;
+
+ memset(&addr, 0, sizeof(addr));
+ TCHECK2(pptr[4], (plen + 7) / 8);
+ memcpy(&addr, &pptr[4], (plen + 7) / 8);
+ if (plen % 8) {
+ addr.s6_addr[(plen + 7) / 8 - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ /* the label may get offsetted by 4 bits so lets shift it right */
+ snprintf(buf, buflen, "%s/%d, label:%u %s",
+ getname6((u_char *)&addr),
+ plen,
+ EXTRACT_24BITS(pptr+1)>>4,
+ ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 4 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
+static int
+decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen)
+{
+ struct in6_addr addr;
+ u_int plen;
+
+ TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+
+ plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
+
+ if (128 < plen)
+ return -1;
+
+ memset(&addr, 0, sizeof(addr));
+ TCHECK2(pptr[12], (plen + 7) / 8);
+ memcpy(&addr, &pptr[12], (plen + 7) / 8);
+ if (plen % 8) {
+ addr.s6_addr[(plen + 7) / 8 - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ /* the label may get offsetted by 4 bits so lets shift it right */
+ snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
+ bgp_vpn_rd_print(pptr+4),
+ getname6((u_char *)&addr),
+ plen,
+ EXTRACT_24BITS(pptr+1)>>4,
+ ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 12 + (plen + 7) / 8;
+
+trunc:
+ return -2;
}
#endif
-static void
+static int
bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
{
int i;
u_int16_t af;
u_int8_t safi, snpa;
- float bw; /* copy buffer for bandwidth values */
+ union { /* copy buffer for bandwidth values */
+ float f;
+ u_int32_t i;
+ } bw;
int advance;
int tlen;
const u_char *tptr;
case BGPTYPE_ORIGIN:
if (len != 1)
printf("invalid len");
- else
+ else {
+ TCHECK(*tptr);
printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", tptr[0]));
+ }
break;
case BGPTYPE_AS_PATH:
if (len % 2) {
printf("empty");
break;
}
+
while (tptr < pptr + len) {
- /*
- * under RFC1965, p[0] means:
- * 1: AS_SET 2: AS_SEQUENCE
- * 3: AS_CONFED_SET 4: AS_CONFED_SEQUENCE
- */
- if (tptr[0] == 3 || tptr[0] == 4)
- printf("confed");
- printf("%s", (tptr[0] & 1) ? "{" : "");
- for (i = 0; i < tptr[1] * 2; i += 2) {
- printf("%s%u", i == 0 ? "" : " ",
- EXTRACT_16BITS(&tptr[2 + i]));
- }
- printf("%s", (tptr[0] & 1) ? "}" : "");
- tptr += 2 + tptr[1] * 2;
+ TCHECK(tptr[0]);
+ printf("%s", tok2str(bgp_as_path_segment_open_values, "?", tptr[0]));
+ for (i = 0; i < tptr[1] * 2; i += 2) {
+ TCHECK2(tptr[2 + i], 2);
+ printf("%u ", EXTRACT_16BITS(&tptr[2 + i]));
+ }
+ TCHECK(tptr[0]);
+ printf("%s", tok2str(bgp_as_path_segment_close_values, "?", tptr[0]));
+ TCHECK(tptr[1]);
+ tptr += 2 + tptr[1] * 2;
}
break;
case BGPTYPE_NEXT_HOP:
if (len != 4)
printf("invalid len");
- else
+ else {
+ TCHECK2(tptr[0], 4);
printf("%s", getname(tptr));
+ }
break;
case BGPTYPE_MULTI_EXIT_DISC:
case BGPTYPE_LOCAL_PREF:
if (len != 4)
printf("invalid len");
- else
+ else {
+ TCHECK2(tptr[0], 4);
printf("%u", EXTRACT_32BITS(tptr));
+ }
break;
case BGPTYPE_ATOMIC_AGGREGATE:
if (len != 0)
printf("invalid len");
break;
}
+ TCHECK2(tptr[0], 6);
printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
getname(tptr + 2));
break;
}
while (tlen>0) {
u_int32_t comm;
+ TCHECK2(tptr[0], 4);
comm = EXTRACT_32BITS(tptr);
switch (comm) {
case BGP_COMMUNITY_NO_EXPORT:
printf("invalid len");
break;
}
+ TCHECK2(tptr[0], 4);
printf("%s",getname(tptr));
break;
case BGPTYPE_CLUSTER_LIST:
+ if (len % 4) {
+ printf("invalid len");
+ break;
+ }
while (tlen>0) {
+ TCHECK2(tptr[0], 4);
printf("%s%s",
getname(tptr),
(tlen>4) ? ", " : "");
}
break;
case BGPTYPE_MP_REACH_NLRI:
+ TCHECK2(tptr[0], 3);
af = EXTRACT_16BITS(tptr);
safi = tptr[2];
tptr +=3;
+ TCHECK(tptr[0]);
tlen = tptr[0];
tptr++;
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
case SAFNUM_LABUNICAST:
- printf("%s",getname(tptr));
- tlen -= sizeof(struct in_addr);
- tptr += sizeof(struct in_addr);
+ case SAFNUM_RT_ROUTING_INFO:
+ if (tlen < (int)sizeof(struct in_addr)) {
+ printf("invalid len");
+ tlen = 0;
+ } else {
+ TCHECK2(tptr[0], sizeof(struct in_addr));
+ printf("%s",getname(tptr));
+ tlen -= sizeof(struct in_addr);
+ tptr += sizeof(struct in_addr);
+ }
break;
case SAFNUM_VPNUNICAST:
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
- printf("RD: %s, %s",
+ if (tlen < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
+ printf("invalid len");
+ tlen = 0;
+ } else {
+ TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN);
+ printf("RD: %s, %s",
bgp_vpn_rd_print(tptr),
getname(tptr+BGP_VPN_RD_LEN));
- tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
- tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
+ tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
+ tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
+ }
break;
default:
- printf("no SAFI %u decoder",safi);
+ TCHECK2(tptr[0], tlen);
+ printf("no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr,"\n\t ",tlen);
+ tptr += tlen;
+ tlen = 0;
break;
}
break;
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
case SAFNUM_LABUNICAST:
- printf("%s", getname6(tptr));
- tlen -= sizeof(struct in6_addr);
- tptr += sizeof(struct in6_addr);
+ case SAFNUM_RT_ROUTING_INFO:
+ if (tlen < (int)sizeof(struct in6_addr)) {
+ printf("invalid len");
+ tlen = 0;
+ } else {
+ TCHECK2(tptr[0], sizeof(struct in6_addr));
+ printf("%s", getname6(tptr));
+ tlen -= sizeof(struct in6_addr);
+ tptr += sizeof(struct in6_addr);
+ }
break;
case SAFNUM_VPNUNICAST:
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
- printf("RD: %s, %s",
+ if (tlen < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
+ printf("invalid len");
+ tlen = 0;
+ } else {
+ TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
+ printf("RD: %s, %s",
bgp_vpn_rd_print(tptr),
getname6(tptr+BGP_VPN_RD_LEN));
- tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
- tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
+ tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
+ tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
+ }
break;
default:
+ TCHECK2(tptr[0], tlen);
printf("no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr,"\n\t ",tlen);
+ tptr += tlen;
+ tlen = 0;
break;
}
break;
case SAFNUM_VPNUNICAST:
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
- printf("%s", getname(tptr));
- tlen -= (sizeof(struct in_addr));
- tptr += (sizeof(struct in_addr));
- break;
+ if (tlen < (int)sizeof(struct in_addr)) {
+ printf("invalid len");
+ tlen = 0;
+ } else {
+ TCHECK2(tptr[0], sizeof(struct in_addr));
+ printf("%s", getname(tptr));
+ tlen -= (sizeof(struct in_addr));
+ tptr += (sizeof(struct in_addr));
+ }
+ break;
default:
+ TCHECK2(tptr[0], tlen);
printf("no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr,"\n\t ",tlen);
+ tptr += tlen;
+ tlen = 0;
break;
}
break;
default:
+ TCHECK2(tptr[0], tlen);
printf("no AFI %u decoder",af);
if (vflag <= 1)
print_unknown_data(tptr,"\n\t ",tlen);
+ tptr += tlen;
+ tlen = 0;
break;
}
}
}
tptr += tlen;
+ TCHECK(tptr[0]);
snpa = tptr[0];
tptr++;
if (snpa) {
printf("\n\t %u SNPA", snpa);
for (/*nothing*/; snpa > 0; snpa--) {
+ TCHECK(tptr[0]);
printf("\n\t %d bytes", tptr[0]);
tptr += tptr[0] + 1;
}
} else {
- printf(", no SNPA");
+ printf(", no SNPA");
}
while (len - (tptr - pptr) > 0) {
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
advance = decode_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
case SAFNUM_LABUNICAST:
advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
case SAFNUM_VPNUNICAST:
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
+ break;
+ case SAFNUM_RT_ROUTING_INFO:
+ advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("\n\t no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
advance = decode_prefix6(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
+ case SAFNUM_LABUNICAST:
+ advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
+ break;
+ case SAFNUM_VPNUNICAST:
+ case SAFNUM_VPNMULTICAST:
+ case SAFNUM_VPNUNIMULTICAST:
+ advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
+ break;
+ case SAFNUM_RT_ROUTING_INFO:
+ advance = decode_rt_routing_info(tptr, buf, sizeof(buf));
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
+ break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("\n\t no SAFI %u decoder ",safi);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
default:
+ TCHECK2(*tptr,tlen);
printf("no SAFI %u decoder",safi);
if (vflag <= 1)
- print_unknown_data(tptr,"\n\t ",tlen);
+ print_unknown_data(tptr,"\n\t ",tlen);
advance = 0;
tptr = pptr + len;
break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("\n\t no AFI %u decoder ",af);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
tptr = pptr + len;
break;
}
+ if (advance < 0) /* infinite loop protection */
+ break;
tptr += advance;
}
break;
case BGPTYPE_MP_UNREACH_NLRI:
+ TCHECK2(tptr[0], 3);
af = EXTRACT_16BITS(tptr);
safi = tptr[2];
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
advance = decode_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
case SAFNUM_LABUNICAST:
advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
case SAFNUM_VPNUNICAST:
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("\n\t no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
advance = decode_prefix6(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
+ case SAFNUM_LABUNICAST:
+ advance = decode_labeled_prefix6(tptr, buf, sizeof(buf));
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
+ break;
+ case SAFNUM_VPNUNICAST:
+ case SAFNUM_VPNMULTICAST:
+ case SAFNUM_VPNUNIMULTICAST:
+ advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf));
+ if (advance == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
+ break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("\n\t no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
case SAFNUM_VPNMULTICAST:
case SAFNUM_VPNUNIMULTICAST:
advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
+ if (advance == -1)
+ printf("\n\t (illegal length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ printf("\n\t %s", buf);
break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("no SAFI %u decoder",safi);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
break;
default:
+ TCHECK2(*(tptr-3),tlen);
printf("\n\t no AFI %u decoder",af);
if (vflag <= 1)
print_unknown_data(tptr-3,"\n\t ",tlen);
}
while (tlen>0) {
u_int16_t extd_comm;
+
+ TCHECK2(tptr[0], 2);
extd_comm=EXTRACT_16BITS(tptr);
+
+ printf("\n\t %s (0x%04x), Flags [%s]",
+ tok2str(bgp_extd_comm_subtype_values, "unknown extd community typecode", extd_comm),
+ extd_comm,
+ bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
+
+ TCHECK2(*(tptr+2), 6);
switch(extd_comm) {
case BGP_EXT_COM_RT_0:
case BGP_EXT_COM_RO_0:
- printf("\n\t %s%s%s:%u:%s",
- (extd_comm&0x8000) ? "vendor-specific: " : "",
- (extd_comm&0x4000) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm),
+ printf(": %u:%s",
EXTRACT_16BITS(tptr+2),
getname(tptr+4));
break;
case BGP_EXT_COM_RT_1:
case BGP_EXT_COM_RO_1:
- printf("\n\t %s%s%s:%s:%u",
- (extd_comm&0x8000) ? "vendor-specific: " : "",
- (extd_comm&0x4000) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm),
+ printf(": %s:%u",
getname(tptr+2),
EXTRACT_16BITS(tptr+6));
break;
+ case BGP_EXT_COM_RT_2:
+ case BGP_EXT_COM_RO_2:
+ printf(": %u:%u",
+ EXTRACT_32BITS(tptr+2),
+ EXTRACT_16BITS(tptr+6));
+ break;
case BGP_EXT_COM_LINKBAND:
- memcpy (&bw, tptr+2, 4);
- printf("\n\t %s%s%s:bandwidth: %.3f Mbps",
- (extd_comm&0x8000) ? "vendor-specific: " : "",
- (extd_comm&0x4000) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm),
- bw*8/1000000);
+ bw.i = EXTRACT_32BITS(tptr+2);
+ printf(": bandwidth: %.3f Mbps",
+ bw.f*8/1000000);
break;
case BGP_EXT_COM_VPN_ORIGIN:
+ case BGP_EXT_COM_VPN_ORIGIN2:
+ case BGP_EXT_COM_VPN_ORIGIN3:
+ case BGP_EXT_COM_VPN_ORIGIN4:
case BGP_EXT_COM_OSPF_RID:
- printf("\n\t %s%s%s:%s",
- (extd_comm&0x8000) ? "vendor-specific: " : "",
- (extd_comm&0x4000) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm),
- getname(tptr+2));
+ case BGP_EXT_COM_OSPF_RID2:
+ printf("%s", getname(tptr+2));
break;
- case BGP_EXT_COM_OSPF_RTYPE:
- printf("\n\t %s%s%s, area:%s, router-type:%s, metric-type:%s%s",
- (extd_comm&0x8000) ? "vendor-specific: " : "",
- (extd_comm&0x4000) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm),
+ case BGP_EXT_COM_OSPF_RTYPE:
+ case BGP_EXT_COM_OSPF_RTYPE2:
+ printf(": area:%s, router-type:%s, metric-type:%s%s",
getname(tptr+2),
tok2str(bgp_extd_comm_ospf_rtype_values,
- "unknown",
- extd_comm),
+ "unknown (0x%02x)",
+ *(tptr+6)),
(*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
(*(tptr+6) == (BGP_OSPF_RTYPE_EXT ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : "");
break;
case BGP_EXT_COM_L2INFO:
- printf("\n\t %s%s:%s:Control Flags [0x%02x]:MTU %u",
- (extd_comm&0x4000) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm),
+ printf(": %s Control Flags [0x%02x]:MTU %u",
tok2str(bgp_l2vpn_encaps_values,
"unknown encaps",
*(tptr+2)),
EXTRACT_16BITS(tptr+4));
break;
default:
- printf("\n\t no typecode %u decoder",
- extd_comm);
print_unknown_data(tptr,"\n\t ",8);
break;
}
break;
default:
+ TCHECK2(*pptr,len);
printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
if (vflag <= 1)
print_unknown_data(pptr,"\n\t ",len);
}
if (vflag > 1 && len) /* omit zero length attributes*/
print_unknown_data(pptr,"\n\t ",len);
+ return 1;
+
+trunc:
+ return 0;
}
static void
printf("\n\t Withdrawn routes: %d bytes", len);
#else
char buf[MAXHOSTNAMELEN + 100];
+ int wpfx;
TCHECK2(p[2], len);
i = 2;
printf("\n\t Withdrawn routes:");
while(i < 2 + len) {
- i += decode_prefix4(&p[i], buf, sizeof(buf));
- printf("\n\t %s", buf);
+ wpfx = decode_prefix4(&p[i], buf, sizeof(buf));
+ if (wpfx == -1) {
+ printf("\n\t (illegal prefix length)");
+ break;
+ } else if (wpfx == -2)
+ goto trunc;
+ else {
+ i += wpfx;
+ printf("\n\t %s", buf);
+ }
}
#endif
}
alen);
if (bgpa.bgpa_flags) {
- printf(", flags [%s%s%s%s",
+ printf(", Flags [%s%s%s%s",
bgpa.bgpa_flags & 0x80 ? "O" : "",
bgpa.bgpa_flags & 0x40 ? "T" : "",
bgpa.bgpa_flags & 0x20 ? "P" : "",
printf("+%x", bgpa.bgpa_flags & 0xf);
printf("]: ");
}
- bgp_attr_print(&bgpa, &p[i + aoff], alen);
+ if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
+ goto trunc;
i += aoff + alen;
}
}
while (dat + length > p) {
char buf[MAXHOSTNAMELEN + 100];
i = decode_prefix4(p, buf, sizeof(buf));
- printf("\n\t %s", buf);
- if (i < 0)
- break;
- p += i;
+ if (i == -1)
+ printf("\n\t (illegal prefix length)");
+ else if (i == -2)
+ goto trunc;
+ else {
+ printf("\n\t %s", buf);
+ p += i;
+ }
}
}
return;
{
struct bgp_notification bgpn;
int hlen;
+ const u_char *tptr;
TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
if (length<BGP_NOTIFICATION_SIZE)
return;
- printf(", Error - %s", tok2str(bgp_notify_major_values, "Unknown", bgpn.bgpn_major));
+ printf(", %s (%u)",
+ tok2str(bgp_notify_major_values, "Unknown Error", bgpn.bgpn_major),
+ bgpn.bgpn_major);
switch (bgpn.bgpn_major) {
case BGP_NOTIFY_MAJOR_MSG:
- printf(" subcode %s", tok2str(bgp_notify_minor_msg_values, "Unknown", bgpn.bgpn_minor));
+ printf(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_msg_values, "Unknown", bgpn.bgpn_minor),
+ bgpn.bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_OPEN:
- printf(" subcode %s", tok2str(bgp_notify_minor_open_values, "Unknown", bgpn.bgpn_minor));
+ printf(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_open_values, "Unknown", bgpn.bgpn_minor),
+ bgpn.bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_UPDATE:
- printf(" subcode %s", tok2str(bgp_notify_minor_update_values, "Unknown", bgpn.bgpn_minor));
+ printf(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_update_values, "Unknown", bgpn.bgpn_minor),
+ bgpn.bgpn_minor);
+ break;
+ case BGP_NOTIFY_MAJOR_CAP:
+ printf(" subcode %s (%u)",
+ tok2str(bgp_notify_minor_cap_values, "Unknown", bgpn.bgpn_minor),
+ bgpn.bgpn_minor);
+ case BGP_NOTIFY_MAJOR_CEASE:
+ printf(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_cease_values, "Unknown", bgpn.bgpn_minor),
+ bgpn.bgpn_minor);
+
+ /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
+ * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
+ */
+ if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
+ tptr = dat + BGP_NOTIFICATION_SIZE;
+ TCHECK2(*tptr, 7);
+ printf(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
+ tok2str(bgp_afi_values, "Unknown", EXTRACT_16BITS(tptr)),
+ EXTRACT_16BITS(tptr),
+ tok2str(bgp_safi_values, "Unknown", *(tptr+2)),
+ *(tptr+2),
+ EXTRACT_32BITS(tptr+3));
+ }
break;
default:
break;
return;
}
-static void
+static int
bgp_header_print(const u_char *dat, int length)
{
struct bgp bgp;
print_unknown_data(dat,"\n\t ",length);
break;
}
- return;
+ return 1;
trunc:
printf("[|BGP]");
+ return 0;
}
void
printf(" [|BGP]");
hlen = ntohs(bgp.bgp_len);
+ if (hlen < BGP_SIZE) {
+ printf("\n[|BGP Bogus header length %u < %u]", hlen,
+ BGP_SIZE);
+ break;
+ }
if (TTEST2(p[0], hlen)) {
- bgp_header_print(p, hlen);
+ if (!bgp_header_print(p, hlen))
+ return;
p += hlen;
start = p;
} else {
- printf("[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type",bgp.bgp_type));
+ printf("\n[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type",bgp.bgp_type));
break;
}
}
trunc:
printf(" [|BGP]");
}
-
-
-
-
-
-
-
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projects / tcpdump / blobdiff