* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
+ *
+ * complete BGP support.
*/
#ifdef HAVE_CONFIG_H
#endif
#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.35 2002-07-14 09:36:00 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 <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-
-#include <netinet/in.h>
+#include <tcpdump-stdinc.h>
-#include <errno.h>
#include <stdio.h>
#include <string.h>
-#include <netdb.h>
#include "interface.h"
#include "addrtoname.h"
#define BGP_UPDATE 2
#define BGP_NOTIFICATION 3
#define BGP_KEEPALIVE 4
+#define BGP_ROUTE_REFRESH 5
static struct tok bgp_msg_values[] = {
{ BGP_OPEN, "Open"},
{ BGP_UPDATE, "Update"},
{ BGP_NOTIFICATION, "Notification"},
{ BGP_KEEPALIVE, "Keepalive"},
+ { BGP_ROUTE_REFRESH, "Route Refresh"},
{ 0, NULL}
};
u_int8_t bgpn_type;
u_int8_t bgpn_major;
u_int8_t bgpn_minor;
- /* data should follow */
};
#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
+struct bgp_route_refresh {
+ u_int8_t bgp_marker[16];
+ u_int16_t len;
+ u_int8_t type;
+ u_int8_t afi[2]; /* the compiler messes this structure up */
+ u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
+ u_int8_t safi; /* afi should be int16 - so we have to access it using */
+}; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
+#define BGP_ROUTE_REFRESH_SIZE 23
+
struct bgp_attr {
u_int8_t bgpa_flags;
u_int8_t bgpa_type;
} 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
+
+
static struct tok bgp_opt_values[] = {
- { 1, "Authentication Information"},
- { 2, "Capabilities Advertisement"},
+ { BGP_OPT_AUTH, "Authentication Information"},
+ { BGP_OPT_CAP, "Capabilities Advertisement"},
+ { 0, NULL}
+};
+
+#define BGP_CAPCODE_MP 1
+#define BGP_CAPCODE_RR 2
+#define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
+#define BGP_CAPCODE_RR_CISCO 128
+
+static struct tok bgp_capcode_values[] = {
+ { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
+ { BGP_CAPCODE_RR, "Route Refresh"},
+ { BGP_CAPCODE_RESTART, "Graceful Restart"},
+ { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
{ 0, NULL}
};
#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[] = {
- { 1, "IGP"},
- { 2, "EGP"},
- { 3, "Incomplete"},
+ { 0, "IGP"},
+ { 1, "EGP"},
+ { 2, "Incomplete"},
{ 0, NULL}
};
#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
static struct tok bgp_safi_values[] = {
{ SAFNUM_RES, "Reserved"},
{ 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-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_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_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},
+};
+
+/* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
+#define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
+#define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
+#define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
+#define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
+#define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
+#define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
+#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
+
+static struct tok bgp_extd_comm_ospf_rtype_values[] = {
+ { BGP_OSPF_RTYPE_RTR, "Router" },
+ { BGP_OSPF_RTYPE_NET, "Network" },
+ { BGP_OSPF_RTYPE_SUM, "Summary" },
+ { BGP_OSPF_RTYPE_EXT, "External" },
+ { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
+ { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
+ { 0, NULL },
+};
+
+static struct tok bgp_l2vpn_encaps_values[] = {
+ { 0, "Reserved"},
+ { 1, "Frame Relay"},
+ { 2, "ATM AAL5 VCC transport"},
+ { 3, "ATM transparent cell transport"},
+ { 4, "Ethernet VLAN"},
+ { 5, "Ethernet"},
+ { 6, "Cisco-HDLC"},
+ { 7, "PPP"},
+ { 8, "CEM"},
+ { 9, "ATM VCC cell transport"},
+ { 10, "ATM VPC cell transport"},
+ { 11, "MPLS"},
+ { 12, "VPLS"},
+ { 64, "IP-interworking"},
+ { 0, NULL},
+};
+
static int
-decode_prefix4(const u_char *pd, char *buf, u_int buflen)
+decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
{
struct in_addr addr;
u_int plen;
- plen = pd[0];
- if (plen < 0 || 32 < plen)
+ TCHECK(pptr[0]);
+ plen = pptr[0];
+ if (32 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
- memcpy(&addr, &pd[1], (plen + 7) / 8);
+ TCHECK2(pptr[1], (plen + 7) / 8);
+ memcpy(&addr, &pptr[1], (plen + 7) / 8);
if (plen % 8) {
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
return 1 + (plen + 7) / 8;
+
+trunc:
+ return -2;
}
static int
-decode_labeled_prefix4(const u_char *pd, char *buf, u_int buflen)
+decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
{
struct in_addr addr;
u_int plen;
- plen = pd[0]; /* get prefix length */
+ TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
/* this is one of the weirdnesses of rfc3107
the label length (actually the label + COS bits)
- is added of the prefix length;
+ is added to the prefix length;
we also do only read out just one label -
- there is no real application for advertisment of
+ there is no real application for advertisement of
stacked labels in a a single BGP message
*/
plen-=24; /* adjust prefixlen - labellength */
- if (plen < 0 || 32 < plen)
+ if (32 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
- memcpy(&addr, &pd[4], (plen + 7) / 8);
+ TCHECK2(pptr[4], (plen + 7) / 8);
+ memcpy(&addr, &pptr[4], (plen + 7) / 8);
if (plen % 8) {
((u_char *)&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",
+ snprintf(buf, buflen, "%s/%d, label:%u %s",
getname((u_char *)&addr),
plen,
- EXTRACT_24BITS(pd+1)>>4,
- ((pd[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ EXTRACT_24BITS(pptr+1)>>4,
+ ((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) {
+
+ /* allocate space for the following string
+ * xxx.xxx.xxx.xxx:xxxxx
+ * 21 bytes plus one termination byte */
+ static char rd[22];
+ char *pos = rd;
+
+ /* ok lets load the RD format */
+ switch (EXTRACT_16BITS(pptr)) {
+
+ /* AS:IP-address fmt*/
+ case 0:
+ 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:
+ 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:
+ 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*/
+
+ if (32 < plen)
+ 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] &=
+ ((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),
+ getname((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;
+}
+
+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),
+ EXTRACT_16BITS(pptr+10),
+ EXTRACT_24BITS(pptr+12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
+ pptr+=15;
+ tlen-=15;
+
+ /* 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;
+ pptr+=2;
+
+ switch(tlv_type) {
+ case 1:
+ strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
+ tlv_type,
+ 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--;
+ }
+ break;
+ default:
+ snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
+ tlv_type,
+ tlv_len);
+ break;
+ }
+ 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
-bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
+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;
+ union { /* copy buffer for bandwidth values */
+ float f;
+ u_int32_t i;
+ } bw;
int advance;
int tlen;
- const u_char *p;
+ const u_char *tptr;
char buf[MAXHOSTNAMELEN + 100];
- p = dat;
+ tptr = pptr;
+ tlen=len;
switch (attr->bgpa_type) {
case BGPTYPE_ORIGIN:
if (len != 1)
- printf(" invalid len");
- else
- printf(" %s", tok2str(bgp_origin_values, "Unknown Origin Typecode", p[0]));
+ printf("invalid len");
+ else {
+ TCHECK(*tptr);
+ printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", tptr[0]));
+ }
break;
case BGPTYPE_AS_PATH:
if (len % 2) {
- printf(" invalid len");
+ printf("invalid len");
break;
}
- while (p < dat + len) {
- /*
- * under RFC1965, p[0] means:
- * 1: AS_SET 2: AS_SEQUENCE
- * 3: AS_CONFED_SET 4: AS_CONFED_SEQUENCE
- */
- printf(" ");
- if (p[0] == 3 || p[0] == 4)
- printf("confed");
- printf("%s", (p[0] & 1) ? "{" : "");
- for (i = 0; i < p[1] * 2; i += 2) {
- printf("%s%u", i == 0 ? "" : " ",
- EXTRACT_16BITS(&p[2 + i]));
- }
- printf("%s", (p[0] & 1) ? "}" : "");
- p += 2 + p[1] * 2;
+ if (!len) {
+ printf("empty");
+ break;
+ }
+
+ while (tptr < pptr + len) {
+ 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
- printf(" %s", getname(p));
+ printf("invalid len");
+ 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
- printf(" %u", EXTRACT_32BITS(p));
+ printf("invalid len");
+ else {
+ TCHECK2(tptr[0], 4);
+ printf("%u", EXTRACT_32BITS(tptr));
+ }
break;
case BGPTYPE_ATOMIC_AGGREGATE:
if (len != 0)
- printf(" invalid len");
+ printf("invalid len");
break;
case BGPTYPE_AGGREGATOR:
if (len != 6) {
- printf(" invalid len");
+ printf("invalid len");
break;
}
- printf(" AS #%u, origin %s", EXTRACT_16BITS(p),
- getname(p + 2));
+ TCHECK2(tptr[0], 6);
+ printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
+ getname(tptr + 2));
break;
case BGPTYPE_COMMUNITIES:
if (len % 4) {
- printf(" invalid len");
+ printf("invalid len");
break;
}
- for (i = 0; i < len; i += 4) {
+ while (tlen>0) {
u_int32_t comm;
- comm = EXTRACT_32BITS(&p[i]);
+ TCHECK2(tptr[0], 4);
+ comm = EXTRACT_32BITS(tptr);
switch (comm) {
case BGP_COMMUNITY_NO_EXPORT:
printf(" NO_EXPORT");
printf(" NO_EXPORT_SUBCONFED");
break;
default:
- printf(" (AS #%d value 0x%04x)",
- (comm >> 16) & 0xffff, comm & 0xffff);
+ printf("%u:%u%s",
+ (comm >> 16) & 0xffff,
+ comm & 0xffff,
+ (tlen>4) ? ", " : "");
break;
}
+ tlen -=4;
+ tptr +=4;
}
break;
+ case BGPTYPE_ORIGINATOR_ID:
+ if (len != 4) {
+ 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) ? ", " : "");
+ tlen -=4;
+ tptr +=4;
+ }
+ break;
case BGPTYPE_MP_REACH_NLRI:
- af = EXTRACT_16BITS(p);
- safi = p[2];
+ TCHECK2(tptr[0], 3);
+ af = EXTRACT_16BITS(tptr);
+ safi = tptr[2];
- printf(" AFI %s, %sSAFI %s,",
+ printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
tok2str(bgp_afi_values, "Unknown AFI", af),
+ af,
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
- tok2str(bgp_safi_values, "Unknown SAFI", safi));
-
- p += 3;
+ tok2str(bgp_safi_values, "Unknown SAFI", safi),
+ safi);
- if (af == AFNUM_INET)
+ if (af == AFNUM_INET || af==AFNUM_L2VPN)
;
#ifdef INET6
else if (af == AFNUM_INET6)
;
#endif
- else
- break;
+ else {
+ printf("\n\t no AFI %u decoder",af);
+ if (vflag <= 1)
+ print_unknown_data(tptr,"\n\t ",tlen);
+ break;
+ }
+
+ tptr +=3;
+
+ TCHECK(tptr[0]);
+ tlen = tptr[0];
+ tptr++;
- tlen = p[0];
if (tlen) {
- printf(" nexthop");
- i = 0;
- while (i < tlen) {
+ printf("\n\t nexthop: ");
+ while (tlen > 0) {
switch (af) {
case AFNUM_INET:
- printf(" %s", getname(p + 1 + i));
- i += sizeof(struct in_addr);
+ switch(safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ case SAFNUM_LABUNICAST:
+ 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:
+ 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);
+ }
+ 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;
#ifdef INET6
case AFNUM_INET6:
- printf(" %s", getname6(p + 1 + i));
- i += sizeof(struct in6_addr);
- break;
+ switch(safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ case SAFNUM_LABUNICAST:
+ 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:
+ 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);
+ }
+ 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;
#endif
+ case AFNUM_L2VPN:
+ switch(safi) {
+ case SAFNUM_VPNUNICAST:
+ case SAFNUM_VPNMULTICAST:
+ case SAFNUM_VPNUNIMULTICAST:
+ 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:
- printf(" (unknown af)");
- i = tlen; /*exit loop*/
- break;
+ 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;
}
}
- printf(",");
}
- p += 1 + tlen;
+ tptr += tlen;
+
+ TCHECK(tptr[0]);
+ snpa = tptr[0];
+ tptr++;
- snpa = p[0];
- p++;
if (snpa) {
- printf(" %u snpa", snpa);
+ printf("\n\t %u SNPA", snpa);
for (/*nothing*/; snpa > 0; snpa--) {
- printf("(%d bytes)", p[0]);
- p += p[0] + 1;
+ TCHECK(tptr[0]);
+ printf("\n\t %d bytes", tptr[0]);
+ tptr += tptr[0] + 1;
}
- printf(",");
} else {
- printf(" no spna,");
+ printf(", no SNPA");
}
- printf(" NLRI");
- while (len - (p - dat) > 0) {
+ while (len - (tptr - pptr) > 0) {
switch (af) {
case AFNUM_INET:
switch (safi) {
case SAFNUM_UNICAST:
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
- advance = decode_prefix4(p, buf, sizeof(buf));
- printf(" %s", buf);
+ advance = decode_prefix4(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_LABUNICAST:
- advance = decode_labeled_prefix4(p, buf, sizeof(buf));
- printf(" %s", buf);
+ advance = decode_labeled_prefix4(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_prefix4(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:
- printf(" (no SAFI %u decoder)",safi);
+ TCHECK2(*(tptr-3),tlen);
+ printf("\n\t no SAFI %u decoder",safi);
+ if (vflag <= 1)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
advance = 0;
- p = dat + len;
+ tptr = pptr + len;
break;
}
break;
case SAFNUM_UNICAST:
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
- advance = decode_prefix6(p, buf, sizeof(buf));
- printf(" %s", buf);
+ advance = decode_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_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:
- printf(" (no SAFI %u decoder)",safi);
+ TCHECK2(*(tptr-3),tlen);
+ printf("\n\t no SAFI %u decoder ",safi);
+ if (vflag <= 1)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
advance = 0;
- p = dat + len;
+ tptr = pptr + len;
break;
}
break;
#endif
+ case AFNUM_L2VPN:
+ switch(safi) {
+ case SAFNUM_VPNUNICAST:
+ case SAFNUM_VPNMULTICAST:
+ case SAFNUM_VPNUNIMULTICAST:
+ advance = decode_labeled_vpn_l2(tptr, buf, sizeof(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);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
+ break;
+
+
default:
- printf(" (unknown AF)");
+ TCHECK2(*(tptr-3),tlen);
+ printf("\n\t no AFI %u decoder ",af);
+ if (vflag <= 1)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
advance = 0;
- p = dat + len;
+ tptr = pptr + len;
break;
}
-
- p += advance;
+ if (advance < 0) /* infinite loop protection */
+ break;
+ tptr += advance;
}
-
break;
case BGPTYPE_MP_UNREACH_NLRI:
- af = EXTRACT_16BITS(p);
- safi = p[2];
+ TCHECK2(tptr[0], 3);
+ af = EXTRACT_16BITS(tptr);
+ safi = tptr[2];
- printf(" AFI %s, %sSAFI %s,",
+ printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
tok2str(bgp_afi_values, "Unknown AFI", af),
+ af,
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
- tok2str(bgp_safi_values, "Unknown SAFI", safi));
+ tok2str(bgp_safi_values, "Unknown SAFI", safi),
+ safi);
- p += 3;
-
- printf(" Withdrawn routes");
+ tptr += 3;
- while (len - (p - dat) > 0) {
+ while (len - (tptr - pptr) > 0) {
switch (af) {
case AFNUM_INET:
switch (safi) {
case SAFNUM_UNICAST:
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
- advance = decode_prefix4(p, buf, sizeof(buf));
- printf(" %s", buf);
+ advance = decode_prefix4(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_LABUNICAST:
- advance = decode_labeled_prefix4(p, buf, sizeof(buf));
- printf(" %s", buf);
+ advance = decode_labeled_prefix4(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_prefix4(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:
- printf(" (no SAFI %u decoder)",safi);
+ TCHECK2(*(tptr-3),tlen);
+ printf("\n\t no SAFI %u decoder",safi);
+ if (vflag <= 1)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
advance = 0;
- p = dat + len;
+ tptr = pptr + len;
break;
}
break;
case SAFNUM_UNICAST:
case SAFNUM_MULTICAST:
case SAFNUM_UNIMULTICAST:
- advance = decode_prefix6(p, buf, sizeof(buf));
- printf(" %s", buf);
+ advance = decode_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_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:
- printf(" (no SAFI %u decoder)",safi);
+ TCHECK2(*(tptr-3),tlen);
+ printf("\n\t no SAFI %u decoder",safi);
+ if (vflag <= 1)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
advance = 0;
- p = dat + len;
+ tptr = pptr + len;
break;
}
break;
#endif
+
+ case AFNUM_L2VPN:
+ switch(safi) {
+ case SAFNUM_VPNUNICAST:
+ case SAFNUM_VPNMULTICAST:
+ case SAFNUM_VPNUNIMULTICAST:
+ advance = decode_labeled_vpn_l2(tptr, buf, sizeof(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);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
+ break;
+
default:
- printf(" (unknown AF)");
+ TCHECK2(*(tptr-3),tlen);
+ printf("\n\t no AFI %u decoder",af);
+ if (vflag <= 1)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
advance = 0;
- p = dat + len;
+ tptr = pptr + len;
break;
}
- p += advance;
+ tptr += advance;
}
break;
+ case BGPTYPE_EXTD_COMMUNITIES:
+ if (len % 8) {
+ printf("invalid len");
+ break;
+ }
+ 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(": %u:%s",
+ EXTRACT_16BITS(tptr+2),
+ getname(tptr+4));
+ break;
+ case BGP_EXT_COM_RT_1:
+ case BGP_EXT_COM_RO_1:
+ 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:
+ 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:
+ case BGP_EXT_COM_OSPF_RID2:
+ printf("%s", getname(tptr+2));
+ break;
+ 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 (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(": %s Control Flags [0x%02x]:MTU %u",
+ tok2str(bgp_l2vpn_encaps_values,
+ "unknown encaps",
+ *(tptr+2)),
+ *(tptr+3),
+ EXTRACT_16BITS(tptr+4));
+ break;
+ default:
+ print_unknown_data(tptr,"\n\t ",8);
+ break;
+ }
+ tlen -=8;
+ tptr +=8;
+ }
+ break;
+
default:
- break;
+ 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);
+ break;
}
+ if (vflag > 1 && len) /* omit zero length attributes*/
+ print_unknown_data(pptr,"\n\t ",len);
+ return 1;
+
+trunc:
+ return 0;
}
static void
struct bgp_opt bgpopt;
int hlen;
const u_char *opt;
- int i;
+ int i,cap_type,cap_len,tcap_len,cap_offset;
TCHECK2(dat[0], BGP_OPEN_SIZE);
memcpy(&bgpo, dat, BGP_OPEN_SIZE);
hlen = ntohs(bgpo.bgpo_len);
- printf(": Version %d,", bgpo.bgpo_version);
- printf(" AS #%u,", ntohs(bgpo.bgpo_myas));
- printf(" Holdtime %u,", ntohs(bgpo.bgpo_holdtime));
- printf(" ID %s,", getname((u_char *)&bgpo.bgpo_id));
- printf(" Option length %u", bgpo.bgpo_optlen);
+ printf("\n\t Version %d, ", bgpo.bgpo_version);
+ printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
+ printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
+ printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
+ printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
+
+ /* some little sanity checking */
+ if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
+ return;
/* ugly! */
opt = &((const struct bgp_open *)dat)->bgpo_optlen;
TCHECK2(opt[i], BGP_OPT_SIZE);
memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
- printf(" [|opt %d %d]", bgpopt.bgpopt_len, bgpopt.bgpopt_type);
+ printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
break;
}
- printf(" (option %s, len=%d)",
+ printf("\n\t Option %s (%u), length: %u",
tok2str(bgp_opt_values,"Unknown", bgpopt.bgpopt_type),
+ bgpopt.bgpopt_type,
bgpopt.bgpopt_len);
+
+ /* now lets decode the options we know*/
+ switch(bgpopt.bgpopt_type) {
+ case BGP_OPT_CAP:
+ cap_type=opt[i+BGP_OPT_SIZE];
+ cap_len=opt[i+BGP_OPT_SIZE+1];
+ tcap_len=cap_len;
+ printf("\n\t %s, length: %u",
+ tok2str(bgp_capcode_values,"Unknown", cap_type),
+ cap_len);
+ switch(cap_type) {
+ case BGP_CAPCODE_MP:
+ printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
+ tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)),
+ EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
+ tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+5]),
+ opt[i+BGP_OPT_SIZE+5]);
+ break;
+ case BGP_CAPCODE_RESTART:
+ printf("\n\t\tRestart Flags: [%s], Restart Time %us",
+ ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none",
+ EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff);
+ tcap_len-=2;
+ cap_offset=4;
+ while(tcap_len>=4) {
+ printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
+ tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset)),
+ EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset),
+ tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+cap_offset+2]),
+ opt[i+BGP_OPT_SIZE+cap_offset+2],
+ ((opt[i+BGP_OPT_SIZE+cap_offset+3])&0x80) ? "yes" : "no" );
+ tcap_len-=4;
+ cap_offset+=4;
+ }
+ break;
+ case BGP_CAPCODE_RR:
+ case BGP_CAPCODE_RR_CISCO:
+ break;
+ default:
+ printf("\n\t\tno decoder for Capability %u",
+ cap_type);
+ if (vflag <= 1)
+ print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
+ break;
+ }
+ if (vflag > 1)
+ print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len);
+ break;
+ case BGP_OPT_AUTH:
+ default:
+ printf("\n\t no decoder for option %u",
+ bgpopt.bgpopt_type);
+ break;
+ }
+
i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
}
return;
const u_char *p;
int len;
int i;
- int newline;
TCHECK2(dat[0], BGP_SIZE);
memcpy(&bgp, dat, BGP_SIZE);
hlen = ntohs(bgp.bgp_len);
p = dat + BGP_SIZE; /*XXX*/
- printf(":");
/* Unfeasible routes */
len = EXTRACT_16BITS(p);
* so only try to decode it if we're not v6 enabled.
*/
#ifdef INET6
- printf(" (Withdrawn routes: %d bytes)", len);
+ printf("\n\t Withdrawn routes: %d bytes", len);
#else
char buf[MAXHOSTNAMELEN + 100];
+ int wpfx;
TCHECK2(p[2], len);
i = 2;
- printf(" (Withdrawn routes:");
+ printf("\n\t Withdrawn routes:");
while(i < 2 + len) {
- i += decode_prefix4(&p[i], buf, sizeof(buf));
- printf(" %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);
+ }
}
- printf(")\n");
#endif
}
p += 2 + len;
if (len) {
/* do something more useful!*/
i = 2;
- printf(" (Path attributes:"); /* ) */
- newline = 0;
while (i < 2 + len) {
int alen, aoff;
alen = bgp_attr_len(&bgpa);
aoff = bgp_attr_off(&bgpa);
- if (vflag && newline)
- printf("\n\t\t");
- else
- printf(" ");
+ printf("\n\t %s (%u), length: %u",
+ tok2str(bgp_attr_values, "Unknown Attribute", bgpa.bgpa_type),
+ bgpa.bgpa_type,
+ alen);
- printf("(%s", tok2str(bgp_attr_values, "Unknown Attribute", bgpa.bgpa_type));
if (bgpa.bgpa_flags) {
- printf("[%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" : "",
bgpa.bgpa_flags & 0x10 ? "E" : "");
if (bgpa.bgpa_flags & 0xf)
printf("+%x", bgpa.bgpa_flags & 0xf);
- printf("]");
+ printf("]: ");
}
-
- bgp_attr_print(&bgpa, &p[i + aoff], alen);
- newline = 1;
-
- /* ( */
- printf(")");
-
+ if (!bgp_attr_print(&bgpa, &p[i + aoff], alen))
+ goto trunc;
i += aoff + alen;
}
-
- /* ( */
- printf(")");
}
p += 2 + len;
- if (len && dat + length > p)
- printf("\n\t\t");
if (dat + length > p) {
- printf("(NLRI:"); /* ) */
+ printf("\n\t Updated routes:");
while (dat + length > p) {
char buf[MAXHOSTNAMELEN + 100];
i = decode_prefix4(p, buf, sizeof(buf));
- printf(" %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;
+ }
}
-
- /* ( */
- printf(")");
}
return;
trunc:
{
struct bgp_notification bgpn;
int hlen;
+ const u_char *tptr;
TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
hlen = ntohs(bgpn.bgpn_len);
- printf(": error %s,", tok2str(bgp_notify_major_values, "Unknown", bgpn.bgpn_major));
+ /* some little sanity checking */
+ if (length<BGP_NOTIFICATION_SIZE)
+ return;
+
+ 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;
}
static void
+bgp_route_refresh_print(const u_char *pptr, int len) {
+
+ const struct bgp_route_refresh *bgp_route_refresh_header;
+ bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
+
+ printf("\n\t AFI %s (%u), SAFI %s (%u)",
+ tok2str(bgp_afi_values,"Unknown",
+ EXTRACT_16BITS(&bgp_route_refresh_header->afi)), /* this stinks but the compiler pads the structure weird */
+ EXTRACT_16BITS(&bgp_route_refresh_header->afi),
+ tok2str(bgp_safi_values,"Unknown",
+ bgp_route_refresh_header->safi),
+ bgp_route_refresh_header->safi);
+
+ if (vflag > 1)
+ print_unknown_data(pptr,"\n\t ", len);
+
+ return;
+}
+
+static int
bgp_header_print(const u_char *dat, int length)
{
struct bgp bgp;
TCHECK2(dat[0], BGP_SIZE);
memcpy(&bgp, dat, BGP_SIZE);
- printf("(%s", tok2str(bgp_msg_values, "Unknown Message Type", bgp.bgp_type));
+ printf("\n\t%s Message (%u), length: %u",
+ tok2str(bgp_msg_values, "Unknown", bgp.bgp_type),
+ bgp.bgp_type,
+ length);
switch (bgp.bgp_type) {
case BGP_OPEN:
case BGP_NOTIFICATION:
bgp_notification_print(dat, length);
break;
+ case BGP_KEEPALIVE:
+ break;
+ case BGP_ROUTE_REFRESH:
+ bgp_route_refresh_print(dat, length);
+ break;
+ default:
+ /* we have no decoder for the BGP message */
+ printf("\n\t no Message %u decoder",bgp.bgp_type);
+ print_unknown_data(dat,"\n\t ",length);
+ break;
}
-
- /* ( */
- printf(")");
- return;
+ return 1;
trunc:
printf("[|BGP]");
+ return 0;
}
void
};
struct bgp bgp;
u_int16_t hlen;
- int newline;
ep = dat + length;
if (snapend < dat + length)
ep = snapend;
- printf(": BGP");
+ printf(": BGP, length: %u",length);
+
+ if (vflag < 1) /* lets be less chatty */
+ return;
p = dat;
- newline = 0;
start = p;
while (p < snapend) {
if (!TTEST2(p[0], 1))
printf(" [|BGP]");
hlen = ntohs(bgp.bgp_len);
- if (vflag && newline)
- printf("\n\t");
- else
- printf(" ");
+ 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);
- newline = 1;
+ 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]");
}
-
-
-
-
-
-
projects / tcpdump / blobdiff