/* specification: RFC 4271 */
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
nd_uint16_t bgpo_holdtime;
nd_uint32_t bgpo_id;
nd_uint8_t bgpo_optlen;
+ nd_uint8_t bgpo_opttype; /* RFC9072 */
+ nd_uint16_t bgpo_optlen_extended; /* RFC9072 */
/* options should follow */
};
#define BGP_OPEN_SIZE 29 /* unaligned */
struct bgp_opt {
- nd_uint8_t bgpopt_type;
- nd_uint8_t bgpopt_len;
+ nd_uint8_t bgpopt_type;
+ nd_uint16_t bgpopt_len; /* Can be one or two bytes, depending on RFC9072 */
/* variable length */
};
#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
};
#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
+struct bgp_route_refresh_orf {
+ nd_uint8_t refresh;
+ nd_uint8_t type;
+ nd_uint16_t len;
+};
+
struct bgp_route_refresh {
nd_byte bgp_marker[16];
nd_uint16_t len;
nd_uint8_t type; /* No padding after this; afi is, in fact, not aligned */
nd_uint16_t afi;
- nd_uint8_t res;
+ nd_uint8_t subtype;
nd_uint8_t safi;
};
+
+static const struct tok bgp_orf_refresh_type[] = {
+ { 1, "Immediate"},
+ { 2, "Defer"},
+ { 0, NULL }
+};
+
+static const struct tok bgp_orf_type[] = {
+ { 64, "Address Prefix ORF"},
+ { 65, "CP-ORF"},
+ { 0, NULL }
+};
+
#define BGP_ROUTE_REFRESH_SIZE 23
+#define BGP_ROUTE_REFRESH_SIZE_ORF BGP_ROUTE_REFRESH_SIZE + 5
+#define BGP_ROUTE_REFRESH_SUBTYPE_NORMAL 0
+#define BGP_ROUTE_REFRESH_SUBTYPE_BORR 1
+#define BGP_ROUTE_REFRESH_SUBTYPE_EORR 2
+#define BGP_ROUTE_REFRESH_SUBTYPE_RESERVED 255
+
+static const struct tok bgp_route_refresh_subtype_values[] = {
+ {BGP_ROUTE_REFRESH_SUBTYPE_NORMAL, "Normal route refresh request"},
+ {BGP_ROUTE_REFRESH_SUBTYPE_BORR,
+ "Demarcation of the beginning of a route refresh"},
+ {BGP_ROUTE_REFRESH_SUBTYPE_EORR,
+ "Demarcation of the ending of a route refresh"},
+ {0, NULL}};
#define bgp_attr_lenlen(flags, p) \
(((flags) & 0x10) ? 2U : 1U)
#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
#define BGPTYPE_ORIGINATOR_ID 9 /* RFC4456 */
#define BGPTYPE_CLUSTER_LIST 10 /* RFC4456 */
-#define BGPTYPE_DPA 11 /* deprecated, draft-ietf-idr-bgp-dpa */
-#define BGPTYPE_ADVERTISERS 12 /* deprecated RFC1863 */
-#define BGPTYPE_RCID_PATH 13 /* deprecated RFC1863 */
#define BGPTYPE_MP_REACH_NLRI 14 /* RFC4760 */
#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC4760 */
#define BGPTYPE_EXTD_COMMUNITIES 16 /* RFC4360 */
#define BGPTYPE_PE_DISTINGUISHER_LABEL 27 /* RFC6514 */
#define BGPTYPE_ENTROPY_LABEL 28 /* RFC6790 */
#define BGPTYPE_LARGE_COMMUNITY 32 /* draft-ietf-idr-large-community-05 */
+#define BGPTYPE_BGPSEC_PATH 33 /* RFC8205 */
+#define BGPTYPE_OTC 35 /* RFC9234 */
#define BGPTYPE_ATTR_SET 128 /* RFC6368 */
#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
{ BGPTYPE_COMMUNITIES, "Community"},
{ BGPTYPE_ORIGINATOR_ID, "Originator ID"},
{ BGPTYPE_CLUSTER_LIST, "Cluster List"},
- { BGPTYPE_DPA, "DPA"},
- { BGPTYPE_ADVERTISERS, "Advertisers"},
- { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
{ BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
{ BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
{ BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
{ BGPTYPE_PE_DISTINGUISHER_LABEL, "PE Distinguisher Label"},
{ BGPTYPE_ENTROPY_LABEL, "Entropy Label"},
{ BGPTYPE_LARGE_COMMUNITY, "Large Community"},
+ { BGPTYPE_BGPSEC_PATH, "BGPsec Path"},
+ { BGPTYPE_OTC, "Only to Customer (OTC)"},
{ BGPTYPE_ATTR_SET, "Attribute Set"},
{ 255, "Reserved for development"},
{ 0, NULL}
#define BGP_CAPCODE_ORF 3 /* RFC5291 */
#define BGP_CAPCODE_MR 4 /* RFC3107 */
#define BGP_CAPCODE_EXT_NH 5 /* RFC5549 */
+#define BGP_CAPCODE_EXT_MSG 6 /* RFC8654 */
+#define BGP_CAPCODE_BGPSEC 7 /* RFC8205 */
#define BGP_CAPCODE_ML 8 /* RFC8277 */
+#define BGP_CAPCODE_ROLE 9 /* RFC9234 */
#define BGP_CAPCODE_RESTART 64 /* RFC4724 */
#define BGP_CAPCODE_AS_NEW 65 /* RFC6793 */
#define BGP_CAPCODE_DYN_CAP 67 /* draft-ietf-idr-dynamic-cap */
#define BGP_CAPCODE_MULTISESS 68 /* draft-ietf-idr-bgp-multisession */
#define BGP_CAPCODE_ADD_PATH 69 /* RFC7911 */
-#define BGP_CAPCODE_ENH_RR 70 /* draft-keyur-bgp-enhanced-route-refresh */
+#define BGP_CAPCODE_ENH_RR 70 /* RFC7313 */
#define BGP_CAPCODE_LLGR 71 /* draft-uttaro-idr-bgp-persistence-05 */
#define BGP_CAPCODE_RR_CISCO 128
{ BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
{ BGP_CAPCODE_MR, "Multiple Routes to a Destination"},
{ BGP_CAPCODE_EXT_NH, "Extended Next Hop Encoding"},
+ { BGP_CAPCODE_EXT_MSG, "BGP Extended Message"},
+ { BGP_CAPCODE_BGPSEC, "BGPsec"},
{ BGP_CAPCODE_ML, "Multiple Labels"},
{ BGP_CAPCODE_RESTART, "Graceful Restart"},
{ BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
{ BGP_CAPCODE_ENH_RR, "Enhanced Route Refresh"},
{ BGP_CAPCODE_LLGR, "Long-lived Graceful Restart"},
{ BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
+ { BGP_CAPCODE_ROLE, "Role Capability"},
{ 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
+#define BGP_NOTIFY_MAJOR_ROUTEREFRESH 7
+#define BGP_NOTIFY_MAJOR_SENDHOLDTIME 8
static const 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"},
+ { BGP_NOTIFY_MAJOR_ROUTEREFRESH, "ROUTE-REFRESH Message Error"},
+ { BGP_NOTIFY_MAJOR_SENDHOLDTIME, "Send Hold Timer Expired"},
{ 0, NULL}
};
-/* draft-ietf-idr-cease-subcode-02 */
+/* RFC 4486 */
#define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
-/* draft-ietf-idr-shutdown-07 */
+/* RFC 9003 */
#define BGP_NOTIFY_MINOR_CEASE_SHUT 2
#define BGP_NOTIFY_MINOR_CEASE_RESET 4
-#define BGP_NOTIFY_MINOR_CEASE_ADMIN_SHUTDOWN_LEN 128
+/* RFC 8538 */
+#define BGP_NOTIFY_MINOR_CEASE_HARDRESET 9
static const struct tok bgp_notify_minor_cease_values[] = {
{ BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
{ BGP_NOTIFY_MINOR_CEASE_SHUT, "Administrative Shutdown"},
{ 5, "Connection Rejected"},
{ 6, "Other Configuration Change"},
{ 7, "Connection Collision Resolution"},
+ { 8, "Out of Resources"},
+ { BGP_NOTIFY_MINOR_CEASE_HARDRESET, "Hard Reset"},
+ { 10, "BFD Down"},
{ 0, NULL}
};
{ 0, NULL }
};
-static const struct tok bgp_notify_minor_cap_values[] = {
- { 1, "Invalid Action Value" },
- { 2, "Invalid Capability Length" },
- { 3, "Malformed Capability Value" },
- { 4, "Unsupported Capability Code" },
+static const struct tok bgp_notify_minor_routerefresh_values[] = {
+ { 1, "Invalid Message Length" },
{ 0, NULL }
};
{ 0, NULL}
};
+#define BGP_ROLE_PROVIDER 0
+#define BGP_ROLE_RS 1
+#define BGP_ROLE_RS_CLIENT 2
+#define BGP_ROLE_CUSTOMER 3
+#define BGP_ROLE_PEER 4
+
+static const struct tok bgp_role_values[] = {
+ { BGP_ROLE_PROVIDER, "Provider"},
+ { BGP_ROLE_RS, "RS"},
+ { BGP_ROLE_RS_CLIENT, "RS-Client"},
+ { BGP_ROLE_CUSTOMER, "Customer"},
+ { BGP_ROLE_PEER, "Peer"},
+ { 0, NULL}
+};
+
/* Subsequent address family identifier, RFC2283 section 7 */
#define SAFNUM_RES 0
#define SAFNUM_UNICAST 1
{ 0, NULL }
};
+static const struct tok bgp_graceful_restart_comm_flag_values[] = {
+ { 0x8, "R" },
+ { 0x4, "N" },
+ { 0, NULL }
+};
+
/* well-known community */
#define BGP_COMMUNITY_NO_EXPORT 0xffffff01
#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
#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) */
+#define BGP_EXT_COM_OVS 0x4300 /* BGP Prefix Origin Validation State Extended Community */
/* 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 compatibility */
#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 compatibility */
+#define BGP_EXT_COM_ENCAP 0x030c /* rfc5512 */
#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 compatibility */
#define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
#define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
+/* Optional Parameters */
+#define BGP_OPEN_NON_EXT_OPT_TYPE_EXTENDED_LENGTH 255 /* Non-Ext OP Type */
+
static const struct tok bgp_extd_comm_flag_values[] = {
{ 0x8000, "vendor-specific"},
{ 0x4000, "non-transitive"},
{ 0, NULL},
};
+/* rfc8097 */
+static const struct tok bgp_prefix_origin_validation_state[] = {
+ { 0, "valid" },
+ { 1, "not found" },
+ { 2, "invalid" },
+ { 0, NULL },
+};
+
static const struct tok bgp_extd_comm_subtype_values[] = {
{ BGP_EXT_COM_RT_0, "target"},
{ BGP_EXT_COM_RT_1, "target"},
{ BGP_EXT_COM_RO_1, "origin"},
{ BGP_EXT_COM_RO_2, "origin"},
{ BGP_EXT_COM_LINKBAND, "link-BW"},
+ { BGP_EXT_COM_OVS, "origin-validation-state"},
{ 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_ENCAP, "encapsulation"},
{ BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
{ BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
{ BGP_EXT_COM_L2INFO, "layer2-info"},
{ 0, NULL},
};
+/* RFC RFC5512 BGP Tunnel Encapsulation Attribute Tunnel Types */
+#define BGP_ENCAP_TUNNEL_L2TPV3_IP 1
+#define BGP_ENCAP_TUNNEL_GRE 2
+#define BGP_ENCAP_TUNNEL_TRANSMIT 3
+#define BGP_ENCAP_TUNNEL_IPSEC 4
+#define BGP_ENCAP_TUNNEL_IP_IPSEC 5
+#define BGP_ENCAP_TUNNEL_MPLS_IP 6
+#define BGP_ENCAP_TUNNEL_IP_IP 7
+#define BGP_ENCAP_TUNNEL_VXLAN 8
+#define BGP_ENCAP_TUNNEL_NVGRE 9
+#define BGP_ENCAP_TUNNEL_MPLS 10
+#define BGP_ENCAP_TUNNEL_MPLS_GRE 11
+#define BGP_ENCAP_TUNNEL_VXLAN_GPE 12
+#define BGP_ENCAP_TUNNEL_MPLS_UDP 13
+#define BGP_ENCAP_TUNNEL_IPV6 14
+#define BGP_ENCAP_TUNNEL_SR_TE 15
+#define BGP_ENCAP_TUNNEL_BARE 16
+#define BGP_ENCAP_TUNNEL_SR 17
+
+static const struct tok bgp_extd_comm_encap_tunnel_values[] = {
+ { BGP_ENCAP_TUNNEL_L2TPV3_IP, "L2TPv3 over IP"},
+ { BGP_ENCAP_TUNNEL_GRE, "GRE"},
+ { BGP_ENCAP_TUNNEL_TRANSMIT, "Transmit Tunnel"},
+ { BGP_ENCAP_TUNNEL_IPSEC, "IPsec"},
+ { BGP_ENCAP_TUNNEL_IP_IPSEC, "IP in IP with IPsec"},
+ { BGP_ENCAP_TUNNEL_MPLS_IP, "MPLS in IP with IPsec"},
+ { BGP_ENCAP_TUNNEL_IP_IP, "IP in IP"},
+ { BGP_ENCAP_TUNNEL_VXLAN, "VXLAN"},
+ { BGP_ENCAP_TUNNEL_NVGRE, "NVGRE"},
+ { BGP_ENCAP_TUNNEL_MPLS, "MPLS"},
+ { BGP_ENCAP_TUNNEL_MPLS_GRE, "MPLS in GRE"},
+ { BGP_ENCAP_TUNNEL_VXLAN_GPE, "VXLAN GPE"},
+ { BGP_ENCAP_TUNNEL_MPLS_UDP, "MPLS in UDP"},
+ { BGP_ENCAP_TUNNEL_IPV6, "IPv6"},
+ { BGP_ENCAP_TUNNEL_SR_TE, "SR TE"},
+ { BGP_ENCAP_TUNNEL_BARE, "Bare"},
+ { BGP_ENCAP_TUNNEL_SR, "SR"},
+ { 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 */
{ 0, NULL },
};
-static char astostr[20];
+static const struct tok bgp_bgpsec_bitmap_str[] = {
+ { 1U << 0, "MBZ-0" },
+ { 1U << 1, "MBZ-1" },
+ { 1U << 2, "MBZ-2" },
+ { 1U << 3, "MBZ-3" },
+ { 1U << 4, "MBZ-4" },
+ { 1U << 5, "MBZ-5" },
+ { 1U << 6, "MBZ-6" },
+ { 1U << 7, "C" },
+ { 0, NULL}
+};
+
+#define AS_STR_SIZE sizeof("xxxxx.xxxxx")
/*
* as_printf
nd_ipv4 addr;
u_int plen, plenbytes;
- ND_TCHECK_1(pptr);
ITEMCHECK(1);
plen = GET_U_1(pptr);
if (32 < plen)
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pptr + 1, plenbytes);
ITEMCHECK(plenbytes);
- memcpy(&addr, pptr + 1, plenbytes);
+ GET_CPY_BYTES(&addr, pptr + 1, plenbytes);
if (plen % 8) {
((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff);
}
snprintf(buf, buflen, "%s/%u", ipaddr_string(ndo, (const u_char *)&addr), plen);
return 1 + plenbytes;
-trunc:
- return -2;
-
badtlv:
- return -3;
+ return -2;
}
static int
-decode_labeled_prefix4(netdissect_options *ndo,
- const u_char *pptr, u_int itemlen, char *buf,
- size_t buflen)
+print_labeled_prefix4(netdissect_options *ndo,
+ const u_char *pptr, u_int itemlen)
{
nd_ipv4 addr;
u_int plen, plenbytes;
*/
if (24 > plen)
- return -1;
+ goto badplen;
plen-=24; /* adjust prefixlen - labellength */
if (32 < plen)
- return -1;
+ goto badplen;
itemlen -= 4;
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pptr + 4, plenbytes);
ITEMCHECK(plenbytes);
- memcpy(&addr, pptr + 4, plenbytes);
+ GET_CPY_BYTES(&addr, pptr + 4, plenbytes);
if (plen % 8) {
((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "%s/%u, label:%u %s",
+ ND_PRINT("\n\t %s/%u, label:%u %s",
ipaddr_string(ndo, (const u_char *)&addr),
plen,
GET_BE_U_3(pptr + 1)>>4,
return 4 + plenbytes;
+badplen:
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
+
trunc:
return -2;
/*
* bgp_vpn_ip_print
*
- * print an ipv4 or ipv6 address into a buffer dependend on address length.
+ * print an ipv4 or ipv6 address into a buffer dependent on address length.
*/
static char *
bgp_vpn_ip_print(netdissect_options *ndo,
switch(addr_length) {
case (sizeof(nd_ipv4) << 3): /* 32 */
- ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
- snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr));
+ snprintf(pos, sizeof(addr), "%s", GET_IPADDR_STRING(pptr));
break;
case (sizeof(nd_ipv6) << 3): /* 128 */
- ND_TCHECK_LEN(pptr, sizeof(nd_ipv6));
- snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr));
+ snprintf(pos, sizeof(addr), "%s", GET_IP6ADDR_STRING(pptr));
break;
default:
snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
}
pos += strlen(pos);
-trunc:
*(pos) = '\0';
return (addr);
}
* return the number of bytes read from the wire.
*/
static u_int
-bgp_vpn_sg_print(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+bgp_vpn_sg_print(netdissect_options *ndo, const u_char *pptr)
{
uint8_t addr_length;
- u_int total_length, offset;
+ u_int total_length;
total_length = 0;
/* Source address length, encoded in bits */
- ND_TCHECK_1(pptr);
addr_length = GET_U_1(pptr);
pptr++;
/* Source address */
ND_TCHECK_LEN(pptr, (addr_length >> 3));
total_length += (addr_length >> 3) + 1;
- offset = (u_int)strlen(buf);
if (addr_length) {
- snprintf(buf + offset, buflen - offset, ", Source %s",
- bgp_vpn_ip_print(ndo, pptr, addr_length));
+ ND_PRINT(", Source %s",
+ bgp_vpn_ip_print(ndo, pptr, addr_length));
pptr += (addr_length >> 3);
}
/* Group address length, encoded in bits */
- ND_TCHECK_1(pptr);
addr_length = GET_U_1(pptr);
pptr++;
/* Group address */
ND_TCHECK_LEN(pptr, (addr_length >> 3));
total_length += (addr_length >> 3) + 1;
- offset = (u_int)strlen(buf);
if (addr_length) {
- snprintf(buf + offset, buflen - offset, ", Group %s",
- bgp_vpn_ip_print(ndo, pptr, addr_length));
+ ND_PRINT(", Group %s",
+ bgp_vpn_ip_print(ndo, pptr, addr_length));
pptr += (addr_length >> 3);
}
/* Print an RFC 4364 Route Distinguisher */
const char *
-bgp_vpn_rd_print(netdissect_options *ndo,
- const u_char *pptr)
+bgp_vpn_rd_print(netdissect_options *ndo, const u_char *pptr)
{
/* allocate space for the largest possible string */
- static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
+ static char rd[sizeof("xxxxx.xxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
char *pos = rd;
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
/* ok lets load the RD format */
switch (GET_BE_U_2(pptr)) {
bgp_extended_community_print(netdissect_options *ndo,
const u_char *pptr)
{
- union { /* copy buffer for bandwidth values */
- float f;
- uint32_t i;
- } bw;
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
switch (GET_BE_U_2(pptr)) {
ND_PRINT("%u:%u (= %s)",
GET_BE_U_2(pptr + 2),
GET_BE_U_4(pptr + 4),
- ipaddr_string(ndo, pptr+4));
+ GET_IPADDR_STRING(pptr+4));
break;
case BGP_EXT_COM_RT_1:
case BGP_EXT_COM_L2VPN_RT_1:
case BGP_EXT_COM_VRF_RT_IMP:
ND_PRINT("%s:%u",
- ipaddr_string(ndo, pptr+2),
+ GET_IPADDR_STRING(pptr+2),
GET_BE_U_2(pptr + 6));
break;
break;
case BGP_EXT_COM_LINKBAND:
- bw.i = GET_BE_U_4(pptr + 2);
ND_PRINT("bandwidth: %.3f Mbps",
- bw.f*8/1000000);
+ GET_BE_F_4(pptr + 4)*8/1000000);
break;
+ case BGP_EXT_COM_OVS:
+ /* The Reserved field MUST be set to 0 and ignored upon the
+ * receipt of this community.
+ */
+ {
+ uint64_t reserved = GET_BE_U_5(pptr + 2);
+
+ if (reserved)
+ ND_PRINT("[the reserved field 0x%" PRIx64 " MUST be 0] ",
+ reserved);
+ ND_PRINT("ovs: %s",
+ tok2str(bgp_prefix_origin_validation_state,
+ "unknown origin validation state",
+ GET_U_1(pptr + 7)));
+ }
+ 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:
- ND_PRINT("%s", ipaddr_string(ndo, pptr+2));
+ ND_PRINT("%s", GET_IPADDR_STRING(pptr+2));
break;
case BGP_EXT_COM_OSPF_RTYPE:
case BGP_EXT_COM_OSPF_RTYPE2:
ND_PRINT("area:%s, router-type:%s, metric-type:%s%s",
- ipaddr_string(ndo, pptr+2),
+ GET_IPADDR_STRING(pptr+2),
tok2str(bgp_extd_comm_ospf_rtype_values,
"unknown (0x%02x)",
GET_U_1((pptr + 6))),
ND_PRINT("AS %u", GET_BE_U_2(pptr + 2));
break;
+ case BGP_EXT_COM_ENCAP:
+ ND_PRINT("Tunnel type: %s", tok2str(bgp_extd_comm_encap_tunnel_values,
+ "unknown encaps",
+ GET_BE_U_2(pptr + 6)));
+ break;
+
default:
ND_PRINT("%02x%02x%02x%02x%02x%02x",
GET_U_1(pptr + 2),
}
}
+/*
+ * RFC4684 (Section 4)/RFC2858 (Section 4).
+ * RTC membership prefix is structured as follows
+ * [prefix-len] [origin-as] [route-target]
+ * The route-target is encoded as RT ext-comms.
+ * Prefix-len may be 0, 32..96
+ *
+ * Note that pptr is not packet data - it is
+ * a buffer owned by our caller - therefore GET_*
+ * macros can not be used.
+ */
+static char *
+bgp_rt_prefix_print(netdissect_options *ndo,
+ const u_char *pptr,
+ u_int plen)
+{
+ /* allocate space for the largest possible string */
+ char rtc_prefix_in_hex[sizeof("0000 0000 0000 0000")] = "";
+ u_int rtc_prefix_in_hex_len = 0;
+ static char output[61]; /* max response string */
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+ uint16_t ec_type = 0;
+ u_int octet_count;
+ u_int i;
+
+ if (plen == 0) {
+ snprintf(output, sizeof(output), "route-target: 0:0/0");
+ return (output);
+ }
+
+ /* hex representation of the prefix */
+ octet_count = (plen+7)/8;
+ for (i=0; i<octet_count; i++) {
+ rtc_prefix_in_hex_len += snprintf(rtc_prefix_in_hex+rtc_prefix_in_hex_len,
+ sizeof(rtc_prefix_in_hex)-rtc_prefix_in_hex_len,
+ "%02x%s", *(pptr+i),
+ ((i%2 == 1) && (i<octet_count-1)) ? " " : "");
+ }
+
+ if (plen < 16) {
+ /*
+ * The prefix is too short to include the full ext-comm type,
+ * so we have no way to parse it further.
+ */
+ snprintf(output, sizeof(output), "route-target: partial-type: (%s/%d)",
+ rtc_prefix_in_hex, plen);
+ return (output);
+ }
+
+ /*
+ * get the ext-comm type
+ * Note: pptr references a static 8 octet buffer with unused bits set to 0,
+ * hence EXTRACT_*() macros are safe.
+ */
+ ec_type = EXTRACT_BE_U_2(pptr);
+ switch (ec_type) {
+ case BGP_EXT_COM_RT_0:
+ /* 2-byte-AS:number fmt */
+ snprintf(output, sizeof(output), "route-target: %u:%u/%d (%s)",
+ EXTRACT_BE_U_2(pptr+2),
+ EXTRACT_BE_U_4(pptr+4),
+ plen, rtc_prefix_in_hex);
+ break;
+
+ case BGP_EXT_COM_RT_1:
+ /* IP-address:AS fmt */
+ snprintf(output, sizeof(output), "route-target: %u.%u.%u.%u:%u/%d (%s)",
+ *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5),
+ EXTRACT_BE_U_2(pptr+6), plen, rtc_prefix_in_hex);
+ break;
+
+ case BGP_EXT_COM_RT_2:
+ /* 4-byte-AS:number fmt */
+ snprintf(output, sizeof(output), "route-target: %s:%u/%d (%s)",
+ as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(pptr+2)),
+ EXTRACT_BE_U_2(pptr+6), plen, rtc_prefix_in_hex);
+ break;
+
+ default:
+ snprintf(output, sizeof(output), "route target: unknown-type(%04x) (%s/%d)",
+ ec_type,
+ rtc_prefix_in_hex, plen);
+ break;
+ }
+ return (output);
+}
+
/* RFC 4684 */
static int
-decode_rt_routing_info(netdissect_options *ndo,
- const u_char *pptr)
+print_rt_routing_info(netdissect_options *ndo, const u_char *pptr)
{
+ uint8_t route_target[8];
u_int plen;
- char asbuf[sizeof(astostr)]; /* bgp_vpn_rd_print() overwrites astostr */
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+ u_int num_octets;
/* NLRI "prefix length" from RFC 2858 Section 4. */
- ND_TCHECK_1(pptr);
plen = GET_U_1(pptr); /* get prefix length */
/* NLRI "prefix" (ibid), valid lengths are { 0, 32, 33, ..., 96 } bits.
}
/* With at least "origin AS", possibly with "route target". */
- ND_TCHECK_4(pptr + 1);
- as_printf(ndo, asbuf, sizeof(asbuf), GET_BE_U_4(pptr + 1));
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(pptr + 1));
plen -= 32; /* adjust prefix length */
- /* An extended community is 8 octets, so the remaining prefix
- * length must be 64.
- */
- if (64 != plen) {
- ND_PRINT("\n\t (illegal prefix length)");
+ if (64 < plen) {
+ ND_PRINT("\n\t (illegal prefix length)");
return -1;
}
- ND_TCHECK_LEN(pptr + 5, 8);
- ND_PRINT("\n\t origin AS: %s, route target ", asbuf);
- bgp_extended_community_print(ndo, pptr + 5);
- return 5 + 8;
+ /* From now on (plen + 7) / 8 evaluates to { 0, 1, 2, ..., 8 }
+ * and gives the number of octets in the variable-length "route
+ * target" field inside this NLRI "prefix". Look for it.
+ */
+ memset(&route_target, 0, sizeof(route_target));
+ num_octets = (plen + 7) / 8;
+ GET_CPY_BYTES(&route_target, pptr + 5, num_octets);
+ /* If mask-len is not on octet boundary, ensure all extra bits are 0 */
+ if (plen % 8) {
+ ((u_char *)&route_target)[num_octets - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ ND_PRINT("\n\t origin AS: %s, %s",
+ astostr,
+ bgp_rt_prefix_print(ndo, (u_char *)&route_target, plen));
-trunc:
- return -2;
+ return 5 + num_octets;
}
static int
-decode_labeled_vpn_prefix4(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_labeled_vpn_prefix4(netdissect_options *ndo, const u_char *pptr)
{
nd_ipv4 addr;
u_int plen;
- ND_TCHECK_1(pptr);
plen = GET_U_1(pptr); /* get prefix length */
if ((24+64) > plen)
- return -1;
+ goto badplen;
plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
if (32 < plen)
- return -1;
+ goto badplen;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
- memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ GET_CPY_BYTES(&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/%u, label:%u %s",
+ ND_PRINT("\n\t RD: %s, %s/%u, label:%u %s",
bgp_vpn_rd_print(ndo, pptr+4),
ipaddr_string(ndo, (const u_char *)&addr),
plen,
return 12 + (plen + 7) / 8;
-trunc:
- return -2;
+badplen:
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
}
/*
#define MDT_VPN_NLRI_LEN 16
static int
-decode_mdt_vpn_nlri(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_mdt_vpn_nlri(netdissect_options *ndo, const u_char *pptr)
{
const u_char *rd;
const u_char *vpn_ip;
- ND_TCHECK_1(pptr);
-
/* if the NLRI is not predefined length, quit.*/
- if (GET_U_1(pptr) != MDT_VPN_NLRI_LEN * 8)
+ if (GET_U_1(pptr) != MDT_VPN_NLRI_LEN * 8) {
+ ND_PRINT("\n\t (illegal prefix length)");
return -1;
+ }
pptr++;
/* RD */
pptr += 8;
/* IPv4 address */
- ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
vpn_ip = pptr;
pptr += sizeof(nd_ipv4);
/* MDT Group Address */
- ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
-
- snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s",
- bgp_vpn_rd_print(ndo, rd), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr));
+ ND_PRINT("\n\t RD: %s, VPN IP Address: %s, MC Group Address: %s",
+ bgp_vpn_rd_print(ndo, rd),
+ GET_IPADDR_STRING(vpn_ip),
+ GET_IPADDR_STRING(pptr));
return MDT_VPN_NLRI_LEN + 1;
};
static int
-decode_multicast_vpn(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_multicast_vpn(netdissect_options *ndo, const u_char *pptr)
{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
uint8_t route_type, route_length;
u_int addr_length, sg_length;
- u_int offset;
- ND_TCHECK_2(pptr);
route_type = GET_U_1(pptr);
pptr++;
route_length = GET_U_1(pptr);
pptr++;
- snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
+ ND_PRINT("\n\t Route-Type: %s (%u), length: %u",
tok2str(bgp_multicast_vpn_route_type_values,
"Unknown", route_type),
route_type, route_length);
switch(route_type) {
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
- offset = (u_int)strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
+ if (route_length < BGP_VPN_RD_LEN)
+ goto trunc;
+ ND_PRINT(", RD: %s, Originator %s",
bgp_vpn_rd_print(ndo, pptr),
bgp_vpn_ip_print(ndo, pptr + BGP_VPN_RD_LEN,
(route_length - BGP_VPN_RD_LEN) << 3));
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4);
- offset = (u_int)strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
- bgp_vpn_rd_print(ndo, pptr),
- as_printf(ndo, astostr, sizeof(astostr),
- GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
+ ND_PRINT(", RD: %s, Source-AS %s",
+ bgp_vpn_rd_print(ndo, pptr),
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
- offset = (u_int)strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s",
- bgp_vpn_rd_print(ndo, pptr));
+ ND_PRINT(", RD: %s", bgp_vpn_rd_print(ndo, pptr));
pptr += BGP_VPN_RD_LEN;
- sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ sg_length = bgp_vpn_sg_print(ndo, pptr);
addr_length = route_length - sg_length;
ND_TCHECK_LEN(pptr, addr_length);
- offset = (u_int)strlen(buf);
- snprintf(buf + offset, buflen - offset, ", Originator %s",
- bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
+ ND_PRINT(", Originator %s",
+ bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
- offset = (u_int)strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s",
- bgp_vpn_rd_print(ndo, pptr));
+ ND_PRINT(", RD: %s", bgp_vpn_rd_print(ndo, pptr));
pptr += BGP_VPN_RD_LEN;
- bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ bgp_vpn_sg_print(ndo, pptr);
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4);
- offset = (u_int)strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
- bgp_vpn_rd_print(ndo, pptr),
- as_printf(ndo, astostr, sizeof(astostr),
- GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
+ ND_PRINT(", RD: %s, Source-AS %s",
+ bgp_vpn_rd_print(ndo, pptr),
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
pptr += BGP_VPN_RD_LEN + 4;
- bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ bgp_vpn_sg_print(ndo, pptr);
break;
/*
return -2;
}
-/*
- * As I remember, some versions of systems have an snprintf() that
- * returns -1 if the buffer would have overflowed. If the return
- * value is negative, set buflen to 0, to indicate that we've filled
- * the buffer up.
- *
- * If the return value is greater than buflen, that means that
- * the buffer would have overflowed; again, set buflen to 0 in
- * that case.
- */
-#define UPDATE_BUF_BUFLEN(buf, buflen, stringlen) \
- if (stringlen<0) \
- buflen=0; \
- else if ((u_int)stringlen>buflen) \
- buflen=0; \
- else { \
- buflen-=stringlen; \
- buf+=stringlen; \
- }
-
static int
-decode_labeled_vpn_l2(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_labeled_vpn_l2(netdissect_options *ndo, const u_char *pptr)
{
u_int plen, tlen, tlv_type, tlv_len, ttlv_len;
- int stringlen;
- ND_TCHECK_2(pptr);
plen = GET_BE_U_2(pptr);
tlen = plen;
pptr += 2;
if (plen == 12) {
/* assume AD-only with RD, BGPNH */
ND_TCHECK_LEN(pptr, 12);
- buf[0] = '\0';
- stringlen = snprintf(buf, buflen, "RD: %s, BGPNH: %s",
+ ND_PRINT("\n\t RD: %s, BGPNH: %s",
bgp_vpn_rd_print(ndo, pptr),
- ipaddr_string(ndo, pptr+8));
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- pptr += 12;
- tlen -= 12;
+ GET_IPADDR_STRING(pptr+8));
return plen + 2;
} else if (plen > 17) {
/* assume old format */
/* RD, ID, LBLKOFF, LBLBASE */
ND_TCHECK_LEN(pptr, 15);
- buf[0] = '\0';
- stringlen = snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
+ ND_PRINT("\n\t RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
bgp_vpn_rd_print(ndo, pptr),
GET_BE_U_2(pptr + 8),
GET_BE_U_2(pptr + 10),
GET_BE_U_3(pptr + 12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
pptr += 15;
tlen -= 15;
/* ok now the variable part - lets read out TLVs*/
while (tlen != 0) {
if (tlen < 3) {
- if (buflen != 0) {
- stringlen=snprintf(buf,buflen, "\n\t\tran past the end");
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
+ ND_PRINT("\n\t\tran past the end");
return plen + 2;
}
- ND_TCHECK_3(pptr);
tlv_type = GET_U_1(pptr);
pptr++;
tlv_len = GET_BE_U_2(pptr); /* length, in *bits* */
switch(tlv_type) {
case 1:
- if (buflen != 0) {
- stringlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
- tlv_type,
- tlv_len);
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
+ ND_PRINT("\n\t\tcircuit status vector (%u) length: %u: 0x",
+ tlv_type,
+ tlv_len);
while (ttlv_len != 0) {
if (tlen < 1) {
- if (buflen != 0) {
- stringlen=snprintf(buf,buflen, " (ran past the end)");
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
+ ND_PRINT(" (ran past the end)");
return plen + 2;
}
ND_TCHECK_1(pptr);
- if (buflen != 0) {
- stringlen=snprintf(buf,buflen, "%02x",
- GET_U_1(pptr));
- pptr++;
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
+ ND_PRINT("%02x", GET_U_1(pptr));
+ pptr++;
ttlv_len--;
tlen--;
}
break;
default:
- if (buflen != 0) {
- stringlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
- tlv_type,
- tlv_len);
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
+ ND_PRINT("\n\t\tunknown TLV #%u, length: %u",
+ tlv_type,
+ tlv_len);
if (tlen < ttlv_len) {
- if (buflen != 0) {
- stringlen=snprintf(buf,buflen, " (ran past the end)");
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
+ ND_PRINT(" (ran past the end)");
return plen + 2;
}
tlen -= ttlv_len;
nd_ipv6 addr;
u_int plen, plenbytes;
- ND_TCHECK_1(pd);
ITEMCHECK(1);
plen = GET_U_1(pd);
if (128 < plen)
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pd + 1, plenbytes);
ITEMCHECK(plenbytes);
- memcpy(&addr, pd + 1, plenbytes);
+ GET_CPY_BYTES(&addr, pd + 1, plenbytes);
if (plen % 8) {
addr[plenbytes - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
snprintf(buf, buflen, "%s/%u", ip6addr_string(ndo, (const u_char *)&addr), plen);
return 1 + plenbytes;
-trunc:
- return -2;
-
badtlv:
- return -3;
+ return -2;
}
static int
-decode_labeled_prefix6(netdissect_options *ndo,
- const u_char *pptr, u_int itemlen, char *buf, size_t buflen)
+print_labeled_prefix6(netdissect_options *ndo,
+ const u_char *pptr, u_int itemlen)
{
nd_ipv6 addr;
u_int plen, plenbytes;
plen = GET_U_1(pptr); /* get prefix length */
if (24 > plen)
- return -1;
+ goto badplen;
plen -= 24; /* adjust prefixlen - labellength */
if (128 < plen)
- return -1;
+ goto badplen;
itemlen -= 4;
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pptr + 4, plenbytes);
- memcpy(&addr, pptr + 4, plenbytes);
+ GET_CPY_BYTES(&addr, pptr + 4, plenbytes);
if (plen % 8) {
addr[plenbytes - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "%s/%u, label:%u %s",
+ ND_PRINT("\n\t %s/%u, label:%u %s",
ip6addr_string(ndo, (const u_char *)&addr),
plen,
GET_BE_U_3(pptr + 1)>>4,
return 4 + plenbytes;
+badplen:
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
+
trunc:
return -2;
}
static int
-decode_labeled_vpn_prefix6(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_labeled_vpn_prefix6(netdissect_options *ndo, const u_char *pptr)
{
nd_ipv6 addr;
u_int plen;
- ND_TCHECK_1(pptr);
plen = GET_U_1(pptr); /* get prefix length */
if ((24+64) > plen)
- return -1;
+ goto badplen;
plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
if (128 < plen)
- return -1;
+ goto badplen;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
- memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8);
if (plen % 8) {
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/%u, label:%u %s",
+ ND_PRINT("\n\t RD: %s, %s/%u, label:%u %s",
bgp_vpn_rd_print(ndo, pptr+4),
ip6addr_string(ndo, (const u_char *)&addr),
plen,
return 12 + (plen + 7) / 8;
-trunc:
- return -2;
+badplen:
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
}
static int
-decode_clnp_prefix(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_clnp_prefix(netdissect_options *ndo, const u_char *pptr)
{
uint8_t addr[19];
u_int plen;
- ND_TCHECK_1(pptr);
plen = GET_U_1(pptr); /* get prefix length */
if (152 < plen)
- return -1;
+ goto badplen;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 4, (plen + 7) / 8);
- memcpy(&addr, pptr + 4, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 4, (plen + 7) / 8);
if (plen % 8) {
addr[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "%s/%u",
+ /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */
+ ND_PRINT("\n\t %s/%u",
isonsap_string(ndo, addr,(plen + 7) / 8),
plen);
return 1 + (plen + 7) / 8;
-trunc:
- return -2;
+badplen:
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
}
static int
-decode_labeled_vpn_clnp_prefix(netdissect_options *ndo,
- const u_char *pptr, char *buf, size_t buflen)
+print_labeled_vpn_clnp_prefix(netdissect_options *ndo, const u_char *pptr)
{
uint8_t addr[19];
u_int plen;
- ND_TCHECK_1(pptr);
plen = GET_U_1(pptr); /* get prefix length */
if ((24+64) > plen)
- return -1;
+ goto badplen;
plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
if (152 < plen)
- return -1;
+ goto badplen;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
- memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8);
if (plen % 8) {
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/%u, label:%u %s",
+ /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */
+ ND_PRINT("\n\t RD: %s, %s/%u, label:%u %s",
bgp_vpn_rd_print(ndo, pptr+4),
isonsap_string(ndo, addr,(plen + 7) / 8),
plen,
return 12 + (plen + 7) / 8;
-trunc:
- return -2;
+badplen:
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
}
/*
* each.
*/
while (tptr < pptr + len) {
- ND_TCHECK_1(tptr);
-
/*
* If we do not find a valid segment type, our guess might be wrong.
*/
if (GET_U_1(tptr) < BGP_AS_SEG_TYPE_MIN || GET_U_1(tptr) > BGP_AS_SEG_TYPE_MAX) {
goto trunc;
}
- ND_TCHECK_1(tptr + 1);
tptr += 2 + GET_U_1(tptr + 1) * 2;
}
/*
* We can come here, either we did not have enough data, or if we
* try to decode 4 byte ASs in 2 byte format. Either way, return 4,
- * so that calller can try to decode each AS as of 4 bytes. If indeed
+ * so that caller can try to decode each AS as of 4 bytes. If indeed
* there was not enough data, it will crib and end the parse anyways.
*/
return 4;
}
/*
- * Scan through the NLRI information under the assumpetion that
+ * Scan through the NLRI information under the assumption that
* it doesn't have path IDs.
*/
for (offset = 0; offset < length;) {
safi);
switch(af<<8 | safi) {
- case (AFNUM_INET<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
- case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
- case (AFNUM_INET<<8 | SAFNUM_MDT):
- case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_UNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_LABUNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_RT_ROUTING_INFO):
+ case (AFNUM_IP<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_MULTICAST_VPN):
+ case (AFNUM_IP<<8 | SAFNUM_MDT):
+ case (AFNUM_IP6<<8 | SAFNUM_UNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_LABUNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNUNIMULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
static int
bgp_nlri_print(netdissect_options *ndo, uint16_t af, uint8_t safi,
const u_char *tptr, u_int len,
- char *buf, size_t buflen,
int add_path4, int add_path6)
{
int advance;
u_int path_id = 0;
+ char buf[512];
switch (af<<8 | safi) {
- case (AFNUM_INET<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_UNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_UNIMULTICAST):
if (add_path4) {
path_id = GET_BE_U_4(tptr);
tptr += 4;
}
- advance = decode_prefix4(ndo, tptr, len, buf, buflen);
+ advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
if (advance == -1)
ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
- goto trunc;
- else if (advance == -3)
break; /* bytes left, but not enough */
else
ND_PRINT("\n\t %s", buf);
advance += 4;
}
break;
- case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
- advance = decode_labeled_prefix4(ndo, tptr, len, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
+ case (AFNUM_IP<<8 | SAFNUM_LABUNICAST):
+ advance = print_labeled_prefix4(ndo, tptr, len);
+ if (advance == -2)
goto trunc;
- else if (advance == -3)
- break; /* bytes left, but not enough */
- else
- ND_PRINT("\n\t %s", buf);
break;
- case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
+ case (AFNUM_IP<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_VPNUNIMULTICAST):
+ advance = print_labeled_vpn_prefix4(ndo, tptr);
break;
- case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
- advance = decode_rt_routing_info(ndo, tptr);
- if (advance == -2)
- goto trunc;
+ case (AFNUM_IP<<8 | SAFNUM_RT_ROUTING_INFO):
+ advance = print_rt_routing_info(ndo, tptr);
break;
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
- advance = decode_multicast_vpn(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
+ case (AFNUM_IP<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
+ case (AFNUM_IP6<<8 | SAFNUM_MULTICAST_VPN):
+ advance = print_multicast_vpn(ndo, tptr);
+ if (advance == -2)
goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
break;
- case (AFNUM_INET<<8 | SAFNUM_MDT):
- advance = decode_mdt_vpn_nlri(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
+ case (AFNUM_IP<<8 | SAFNUM_MDT):
+ advance = print_mdt_vpn_nlri(ndo, tptr);
+ if (advance == -2)
goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
break;
- case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_UNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_UNIMULTICAST):
if (add_path6) {
path_id = GET_BE_U_4(tptr);
tptr += 4;
}
- advance = decode_prefix6(ndo, tptr, len, buf, buflen);
+ advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
if (advance == -1)
ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
- goto trunc;
- else if (advance == -3)
break; /* bytes left, but not enough */
else
ND_PRINT("\n\t %s", buf);
advance += 4;
}
break;
- case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
- advance = decode_labeled_prefix6(ndo, tptr, len, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
+ case (AFNUM_IP6<<8 | SAFNUM_LABUNICAST):
+ advance = print_labeled_prefix6(ndo, tptr, len);
+ if (advance == -2)
goto trunc;
- else if (advance == -3)
- break; /* bytes left, but not enough */
- else
- ND_PRINT("\n\t %s", buf);
break;
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
+ case (AFNUM_IP6<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNUNIMULTICAST):
+ advance = print_labeled_vpn_prefix6(ndo, tptr);
break;
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_l2(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal length)");
- else if (advance == -2)
+ advance = print_labeled_vpn_l2(ndo, tptr);
+ if (advance == -2)
goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_clnp_prefix(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
+ advance = print_clnp_prefix(ndo, tptr);
break;
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, buflen);
- if (advance == -1)
- ND_PRINT("\n\t (illegal prefix length)");
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT("\n\t %s", buf);
+ advance = print_labeled_vpn_clnp_prefix(ndo, tptr);
break;
default:
/*
return -2;
}
+static const struct tok bgp_flags[] = {
+ { 0x80, "O"},
+ { 0x40, "T"},
+ { 0x20, "P"},
+ { 0x10, "E"},
+ { 0, NULL }
+};
+
static int
bgp_attr_print(netdissect_options *ndo,
- uint8_t atype, const u_char *pptr, u_int len)
+ uint8_t atype, const u_char *pptr, u_int len,
+ const unsigned attr_set_level)
{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
u_int i;
uint16_t af;
uint8_t safi, snpa, nhlen;
int advance;
u_int tlen;
const u_char *tptr;
- char buf[MAXHOSTNAMELEN + 100];
u_int as_size;
int add_path4, add_path6;
int ret;
if (len != 1)
ND_PRINT("invalid len");
else {
- ND_TCHECK_1(tptr);
ND_PRINT("%s", tok2str(bgp_origin_values,
"Unknown Origin Typecode",
GET_U_1(tptr)));
as_size = bgp_attr_get_as_size(ndo, atype, pptr, len);
while (tptr < pptr + len) {
- ND_TCHECK_1(tptr);
ND_PRINT("%s", tok2str(bgp_as_path_segment_open_values,
"?", GET_U_1(tptr)));
- ND_TCHECK_1(tptr + 1);
for (i = 0; i < GET_U_1(tptr + 1) * as_size; i += as_size) {
ND_TCHECK_LEN(tptr + 2 + i, as_size);
ND_PRINT("%s ",
GET_BE_U_2(tptr + i + 2) :
GET_BE_U_4(tptr + i + 2)));
}
- ND_TCHECK_1(tptr);
ND_PRINT("%s", tok2str(bgp_as_path_segment_close_values,
"?", GET_U_1(tptr)));
- ND_TCHECK_1(tptr + 1);
tptr += 2 + GET_U_1(tptr + 1) * as_size;
}
break;
if (len != 4)
ND_PRINT("invalid len");
else {
- ND_TCHECK_4(tptr);
- ND_PRINT("%s", ipaddr_string(ndo, tptr));
+ ND_PRINT("%s", GET_IPADDR_STRING(tptr));
}
break;
case BGPTYPE_MULTI_EXIT_DISC:
if (len != 4)
ND_PRINT("invalid len");
else {
- ND_TCHECK_4(tptr);
ND_PRINT("%u", GET_BE_U_4(tptr));
}
break;
if (len == 6) {
ND_PRINT(" AS #%s, origin %s",
as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_2(tptr)),
- ipaddr_string(ndo, tptr + 2));
+ GET_IPADDR_STRING(tptr + 2));
} else {
ND_PRINT(" AS #%s, origin %s",
as_printf(ndo, astostr, sizeof(astostr),
- GET_BE_U_4(tptr)), ipaddr_string(ndo, tptr + 4));
+ GET_BE_U_4(tptr)), GET_IPADDR_STRING(tptr + 4));
}
break;
case BGPTYPE_AGGREGATOR4:
ND_PRINT("invalid len");
break;
}
- ND_TCHECK_8(tptr);
ND_PRINT(" AS #%s, origin %s",
as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr)),
- ipaddr_string(ndo, tptr + 4));
+ GET_IPADDR_STRING(tptr + 4));
break;
case BGPTYPE_COMMUNITIES:
if (len % 4) {
ND_PRINT("invalid len");
break;
}
- ND_TCHECK_4(tptr);
- ND_PRINT("%s",ipaddr_string(ndo, tptr));
+ ND_PRINT("%s",GET_IPADDR_STRING(tptr));
break;
case BGPTYPE_CLUSTER_LIST:
if (len % 4) {
break;
}
while (tlen != 0) {
- ND_TCHECK_4(tptr);
if (tlen < 4)
goto trunc;
ND_PRINT("%s%s",
- ipaddr_string(ndo, tptr),
+ GET_IPADDR_STRING(tptr),
(tlen>4) ? ", " : "");
tlen -=4;
tptr +=4;
if (ret < 0)
break;
- tptr +=3;
+ tptr += 3;
+ tlen -= 3;
ND_TCHECK_1(tptr);
+ if (tlen < 1)
+ goto trunc;
nhlen = GET_U_1(tptr);
- tlen = nhlen;
tptr++;
+ tlen--;
- if (tlen) {
+ if (nhlen) {
u_int nnh = 0;
+ uint8_t tnhlen = nhlen;
+ if (tlen < tnhlen)
+ goto trunc;
ND_PRINT("\n\t nexthop: ");
- while (tlen != 0) {
+ while (tnhlen != 0) {
if (nnh++ > 0) {
ND_PRINT(", " );
}
switch(af<<8 | safi) {
- case (AFNUM_INET<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
- case (AFNUM_INET<<8 | SAFNUM_MDT):
- if (tlen < sizeof(nd_ipv4)) {
+ case (AFNUM_IP<<8 | SAFNUM_UNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_LABUNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_RT_ROUTING_INFO):
+ case (AFNUM_IP<<8 | SAFNUM_MULTICAST_VPN):
+ case (AFNUM_IP<<8 | SAFNUM_MDT):
+ if (tnhlen < sizeof(nd_ipv4)) {
ND_PRINT("invalid len");
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
} else {
- ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
- ND_PRINT("%s",ipaddr_string(ndo, tptr));
- tlen -= sizeof(nd_ipv4);
+ ND_PRINT("%s",GET_IPADDR_STRING(tptr));
tptr += sizeof(nd_ipv4);
+ tnhlen -= sizeof(nd_ipv4);
+ tlen -= sizeof(nd_ipv4);
}
break;
- case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < sizeof(nd_ipv4)+BGP_VPN_RD_LEN) {
+ case (AFNUM_IP<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_IP<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_IP<<8 | SAFNUM_VPNUNIMULTICAST):
+ if (tnhlen < sizeof(nd_ipv4)+BGP_VPN_RD_LEN) {
ND_PRINT("invalid len");
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
} else {
- ND_TCHECK_LEN(tptr,
- sizeof(nd_ipv4) + BGP_VPN_RD_LEN);
ND_PRINT("RD: %s, %s",
bgp_vpn_rd_print(ndo, tptr),
- ipaddr_string(ndo, tptr+BGP_VPN_RD_LEN));
- tlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
+ GET_IPADDR_STRING(tptr+BGP_VPN_RD_LEN));
tptr += (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
+ tlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
+ tnhlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
}
break;
- case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
- if (tlen < sizeof(nd_ipv6)) {
+ case (AFNUM_IP6<<8 | SAFNUM_UNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_LABUNICAST):
+ if (tnhlen < sizeof(nd_ipv6)) {
ND_PRINT("invalid len");
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
} else {
- ND_TCHECK_LEN(tptr, sizeof(nd_ipv6));
- ND_PRINT("%s", ip6addr_string(ndo, tptr));
- tlen -= sizeof(nd_ipv6);
+ ND_PRINT("%s", GET_IP6ADDR_STRING(tptr));
tptr += sizeof(nd_ipv6);
+ tlen -= sizeof(nd_ipv6);
+ tnhlen -= sizeof(nd_ipv6);
}
break;
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < sizeof(nd_ipv6)+BGP_VPN_RD_LEN) {
+ case (AFNUM_IP6<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_IP6<<8 | SAFNUM_VPNUNIMULTICAST):
+ if (tnhlen < sizeof(nd_ipv6)+BGP_VPN_RD_LEN) {
ND_PRINT("invalid len");
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
} else {
- ND_TCHECK_LEN(tptr,
- sizeof(nd_ipv6) + BGP_VPN_RD_LEN);
ND_PRINT("RD: %s, %s",
bgp_vpn_rd_print(ndo, tptr),
- ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN));
- tlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
+ GET_IP6ADDR_STRING(tptr+BGP_VPN_RD_LEN));
tptr += (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
+ tlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
+ tnhlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
}
break;
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < sizeof(nd_ipv4)) {
+ if (tnhlen < sizeof(nd_ipv4)) {
ND_PRINT("invalid len");
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
} else {
- ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
- ND_PRINT("%s", ipaddr_string(ndo, tptr));
- tlen -= (sizeof(nd_ipv4));
+ ND_PRINT("%s", GET_IPADDR_STRING(tptr));
tptr += (sizeof(nd_ipv4));
+ tlen -= (sizeof(nd_ipv4));
+ tnhlen -= (sizeof(nd_ipv4));
}
break;
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
- ND_TCHECK_LEN(tptr, tlen);
- ND_PRINT("%s", isonsap_string(ndo, tptr, tlen));
- tptr += tlen;
- tlen = 0;
+ ND_PRINT("%s", GET_ISONSAP_STRING(tptr, tnhlen));
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
break;
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < BGP_VPN_RD_LEN+1) {
+ if (tnhlen < BGP_VPN_RD_LEN+1) {
ND_PRINT("invalid len");
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
} else {
- ND_TCHECK_LEN(tptr, tlen);
+ ND_TCHECK_LEN(tptr, tnhlen);
ND_PRINT("RD: %s, %s",
bgp_vpn_rd_print(ndo, tptr),
- isonsap_string(ndo, tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN));
+ GET_ISONSAP_STRING(tptr+BGP_VPN_RD_LEN,tnhlen-BGP_VPN_RD_LEN));
/* rfc986 mapped IPv4 address ? */
if (GET_BE_U_4(tptr + BGP_VPN_RD_LEN) == 0x47000601)
- ND_PRINT(" = %s", ipaddr_string(ndo, tptr+BGP_VPN_RD_LEN+4));
+ ND_PRINT(" = %s", GET_IPADDR_STRING(tptr+BGP_VPN_RD_LEN+4));
/* rfc1888 mapped IPv6 address ? */
else if (GET_BE_U_3(tptr + BGP_VPN_RD_LEN) == 0x350000)
- ND_PRINT(" = %s", ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN+3));
- tptr += tlen;
- tlen = 0;
+ ND_PRINT(" = %s", GET_IP6ADDR_STRING(tptr+BGP_VPN_RD_LEN+3));
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
}
break;
default:
* an unsupported AFI/SAFI.
*/
ND_PRINT("ERROR: no AFI %u/SAFI %u nexthop decoder", af, safi);
- tptr += tlen;
- tlen = 0;
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
goto done;
- break;
}
}
}
ND_PRINT(", nh-length: %u", nhlen);
- tptr += tlen;
- ND_TCHECK_1(tptr);
+ /* As per RFC 2858; this is reserved in RFC 4760 */
+ if (tlen < 1)
+ goto trunc;
snpa = GET_U_1(tptr);
tptr++;
+ tlen--;
if (snpa) {
ND_PRINT("\n\t %u SNPA", snpa);
for (/*nothing*/; snpa != 0; snpa--) {
- ND_TCHECK_1(tptr);
- ND_PRINT("\n\t %u bytes", GET_U_1(tptr));
- tptr += GET_U_1(tptr) + 1;
+ uint8_t snpalen;
+ if (tlen < 1)
+ goto trunc;
+ snpalen = GET_U_1(tptr);
+ ND_PRINT("\n\t %u bytes", snpalen);
+ tptr++;
+ tlen--;
+ if (tlen < snpalen)
+ goto trunc;
+ ND_TCHECK_LEN(tptr, snpalen);
+ tptr += snpalen;
+ tlen -= snpalen;
}
} else {
ND_PRINT(", no SNPA");
}
- add_path4 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 32);
- add_path6 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 128);
+ add_path4 = check_add_path(ndo, tptr,
+ (len-ND_BYTES_BETWEEN(pptr, tptr)), 32);
+ add_path6 = check_add_path(ndo, tptr,
+ (len-ND_BYTES_BETWEEN(pptr, tptr)), 128);
while (tptr < pptr + len) {
- advance = bgp_nlri_print(ndo, af, safi, tptr, len, buf, sizeof(buf),
+ advance = bgp_nlri_print(ndo, af, safi, tptr, len,
add_path4, add_path6);
if (advance == -2)
goto trunc;
tptr += 3;
- add_path4 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 32);
- add_path6 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 128);
+ add_path4 = check_add_path(ndo, tptr,
+ (len-ND_BYTES_BETWEEN(pptr, tptr)), 32);
+ add_path6 = check_add_path(ndo, tptr,
+ (len-ND_BYTES_BETWEEN(pptr, tptr)), 128);
while (tptr < pptr + len) {
- advance = bgp_nlri_print(ndo, af, safi, tptr, len, buf, sizeof(buf),
+ advance = bgp_nlri_print(ndo, af, safi, tptr, len,
add_path4, add_path6);
if (advance == -2)
goto trunc;
goto trunc;
flags = GET_U_1(tptr);
tunnel_type = GET_U_1(tptr + 1);
- tlen = len;
ND_PRINT("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
switch (tunnel_type) {
case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
case BGP_PMSI_TUNNEL_PIM_BIDIR:
- ND_TCHECK_8(tptr);
ND_PRINT("\n\t Sender %s, P-Group %s",
- ipaddr_string(ndo, tptr),
- ipaddr_string(ndo, tptr+4));
+ GET_IPADDR_STRING(tptr),
+ GET_IPADDR_STRING(tptr+4));
break;
case BGP_PMSI_TUNNEL_PIM_SSM:
- ND_TCHECK_8(tptr);
ND_PRINT("\n\t Root-Node %s, P-Group %s",
- ipaddr_string(ndo, tptr),
- ipaddr_string(ndo, tptr+4));
+ GET_IPADDR_STRING(tptr),
+ GET_IPADDR_STRING(tptr+4));
break;
case BGP_PMSI_TUNNEL_INGRESS:
- ND_TCHECK_4(tptr);
ND_PRINT("\n\t Tunnel-Endpoint %s",
- ipaddr_string(ndo, tptr));
+ GET_IPADDR_STRING(tptr));
break;
case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
case BGP_PMSI_TUNNEL_LDP_MP2MP:
- ND_TCHECK_8(tptr);
ND_PRINT("\n\t Root-Node %s, LSP-ID 0x%08x",
- ipaddr_string(ndo, tptr),
+ GET_IPADDR_STRING(tptr),
GET_BE_U_4(tptr + 4));
break;
case BGP_PMSI_TUNNEL_RSVP_P2MP:
- ND_TCHECK_8(tptr);
ND_PRINT("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
- ipaddr_string(ndo, tptr),
+ GET_IPADDR_STRING(tptr),
GET_BE_U_4(tptr + 4));
break;
default:
uint8_t type;
uint16_t length;
- tlen = len;
-
while (tlen >= 3) {
-
- ND_TCHECK_3(tptr);
-
type = GET_U_1(tptr);
length = GET_BE_U_2(tptr + 1);
tptr += 3;
/*
* Check if we can read the TLV data.
*/
- ND_TCHECK_LEN(tptr + 3, length);
if (tlen < length)
goto trunc;
alen);
if (aflags) {
- ND_PRINT(", Flags [%s%s%s%s",
- aflags & 0x80 ? "O" : "",
- aflags & 0x40 ? "T" : "",
- aflags & 0x20 ? "P" : "",
- aflags & 0x10 ? "E" : "");
+ ND_PRINT(", Flags [%s",
+ bittok2str_nosep(bgp_flags, "", aflags));
if (aflags & 0xf)
ND_PRINT("+%x", aflags & 0xf);
ND_PRINT("]");
tptr += len;
break;
}
- /* FIXME check for recursion */
- if (!bgp_attr_print(ndo, atype, tptr, alen))
+ /*
+ * The protocol encoding per se allows ATTR_SET to be nested
+ * as many times as the message can accommodate. This printer
+ * used to be able to recurse into ATTR_SET contents until the
+ * stack exhaustion, but now there is a limit on that (if live
+ * protocol exchange goes that many levels deep, something is
+ * probably wrong anyway). Feel free to refine this value if
+ * you can find the spec with respective normative text.
+ */
+ if (attr_set_level == 10)
+ ND_PRINT("(too many nested levels, not recursing)");
+ else if (!bgp_attr_print(ndo, atype, tptr, alen, attr_set_level + 1))
return 0;
tptr += alen;
len -= alen;
}
ND_PRINT("\n\t ");
while (len != 0) {
- ND_TCHECK_LEN(tptr, 12);
ND_PRINT("%u:%u:%u%s",
GET_BE_U_4(tptr),
GET_BE_U_4(tptr + 4),
len -= 12;
}
break;
+ case BGPTYPE_BGPSEC_PATH:
+ {
+ uint16_t sblen, splen;
+
+ splen = GET_BE_U_2(tptr);
+
+ /*
+ * A secure path has a minimum length of 8 bytes:
+ * 2 bytes length field
+ * 6 bytes per secure path segment
+ */
+ ND_ICHECKMSG_U("secure path length", splen, <, 8);
+
+ ND_PRINT("\n\t Secure Path Length: %u", splen);
+
+ tptr += 2;
+ splen -= 2;
+ /* Make sure the secure path length does not signal trailing bytes */
+ if (splen % 6) {
+ ND_PRINT(" [total segments length %u != N x 6]", splen);
+ goto invalid;
+ }
+
+ /* Parse secure path segments */
+ while (splen != 0) {
+ uint8_t pcount = GET_U_1(tptr);
+ uint8_t flags = GET_U_1(tptr + 1);
+ uint32_t asn = GET_BE_U_4(tptr + 2);
+ ND_PRINT("\n\t Secure Path Segment: pCount: %u, Flags: [%s] (0x%02x), AS: %u",
+ pcount,
+ bittok2str(bgp_bgpsec_bitmap_str, "none", flags),
+ flags,
+ asn);
+ tptr += 6;
+ splen -= 6;
+ }
+
+ sblen = GET_BE_U_2(tptr);
+
+ ND_PRINT("\n\t Signature Block: Length: %u, Algo ID: %u",
+ sblen,
+ GET_U_1(tptr + 2));
+
+ tptr += 3;
+ sblen -= 3;
+ /* Parse signature segments */
+ while (sblen != 0) {
+ uint16_t siglen;
+
+ ND_PRINT("\n\t Signature Segment:\n\t SKI: ");
+ ND_ICHECKMSG_U("remaining length", sblen, <, 20);
+ hex_print(ndo, "\n\t ", tptr, 20);
+ tptr += 20;
+ sblen -= 20;
+ ND_ICHECKMSG_U("remaining length", sblen, <, 2);
+ siglen = GET_BE_U_2(tptr);
+ tptr += 2;
+ sblen -= 2;
+
+ ND_PRINT("\n\t Length: %u", siglen);
+ ND_ICHECKMSG_U("remaining length", sblen, <, siglen);
+ ND_PRINT("\n\t Signature:");
+ hex_print(ndo, "\n\t ", tptr, siglen);
+ tptr += siglen;
+ sblen -= siglen;
+ }
+ break;
+ }
+ case BGPTYPE_OTC:
+ {
+ if (len < 4) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ ND_PRINT("\n\t OTC %u", GET_BE_U_4(pptr));
+ break;
+ }
default:
ND_TCHECK_LEN(pptr, len);
ND_PRINT("\n\t no Attribute %u decoder", atype); /* we have no decoder for the attribute */
}
return 1;
+invalid:
+ nd_print_invalid(ndo);
+ return 1;
+
trunc:
return 0;
}
bgp_capabilities_print(netdissect_options *ndo,
const u_char *opt, u_int caps_len)
{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
u_int cap_type, cap_len, tcap_len, cap_offset;
u_int i = 0;
tok2str(bgp_safi_values, "Unknown", GET_U_1(opt + i + 5)),
GET_U_1(opt + i + 5));
break;
+ case BGP_CAPCODE_BGPSEC:
+ /* Version (4 bits), Direction (1 bit), Flags (3 bits), AFI (16 bits) */
+ cap_offset = 1;
+ /* The capability length [...] MUST be set to 3. */
+ if (cap_len != 3) {
+ ND_PRINT(" [%u != 3]", cap_len);
+ return;
+ }
+
+ ND_PRINT("\n\t\tVersion %u, Direction %s (%u), AFI %s (%u)",
+ GET_U_1(opt + i + 2)&0xf0,
+ (GET_U_1(opt + i + 2)&0x08) ? "Send" : "Receive",
+ (GET_U_1(opt + i + 2)&0x08)>>3,
+ bittok2str(af_values, "Unknown",
+ GET_BE_U_2(opt + i + cap_offset + 2)),
+ GET_BE_U_2(opt + i + cap_offset + 2));
+ break;
case BGP_CAPCODE_ML:
cap_offset = 2;
tcap_len = cap_len;
}
tcap_len=cap_len;
ND_PRINT("\n\t\tRestart Flags: [%s], Restart Time %us",
- ((GET_U_1(opt + i + 2))&0x80) ? "R" : "none",
+ bittok2str(bgp_graceful_restart_comm_flag_values,
+ "none", GET_U_1(opt + i + 2) >> 4),
GET_BE_U_2(opt + i + 2)&0xfff);
tcap_len-=2;
cap_offset=4;
cap_offset += 4;
}
break;
+ case BGP_CAPCODE_ROLE:
+ if (cap_len < 1) {
+ ND_PRINT(" (too short, < 1)");
+ return;
+ }
+ ND_PRINT("\n\t\tRole name %s (%u)",
+ tok2str(bgp_role_values, "Unassigned",
+ GET_U_1(opt + i + 2)), GET_U_1(opt + i + 2));
+ break;
case BGP_CAPCODE_RR:
case BGP_CAPCODE_LLGR:
case BGP_CAPCODE_RR_CISCO:
+ case BGP_CAPCODE_EXT_MSG:
+ case BGP_CAPCODE_ENH_RR:
break;
case BGP_CAPCODE_AS_NEW:
/*
bgp_open_print(netdissect_options *ndo,
const u_char *dat, u_int length)
{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
const struct bgp_open *bgp_open_header;
u_int optslen;
+ uint8_t opsttype;
const struct bgp_opt *bgpopt;
const u_char *opt;
u_int i;
+ uint8_t extended_opt_params = 0;
+ u_int open_size = BGP_OPEN_SIZE;
+ u_int opt_size = BGP_OPT_SIZE;
ND_TCHECK_LEN(dat, BGP_OPEN_SIZE);
if (length < BGP_OPEN_SIZE)
as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_2(bgp_open_header->bgpo_myas)));
ND_PRINT("Holdtime %us, ",
GET_BE_U_2(bgp_open_header->bgpo_holdtime));
- ND_PRINT("ID %s", ipaddr_string(ndo, bgp_open_header->bgpo_id));
+ ND_PRINT("ID %s", GET_IPADDR_STRING(bgp_open_header->bgpo_id));
optslen = GET_U_1(bgp_open_header->bgpo_optlen);
- ND_PRINT("\n\t Optional parameters, length: %u", optslen);
+ opsttype = GET_U_1(bgp_open_header->bgpo_opttype);
+ if (opsttype == BGP_OPEN_NON_EXT_OPT_TYPE_EXTENDED_LENGTH) {
+ optslen = GET_BE_U_2(bgp_open_header->bgpo_optlen_extended);
+ extended_opt_params = 1;
+ open_size += 3;
+ opt_size += 1;
+ }
+ ND_PRINT("\n\t Optional parameters%s, length: %u",
+ extended_opt_params ? " (Extended)" : "", optslen);
- opt = dat + BGP_OPEN_SIZE;
- length -= BGP_OPEN_SIZE;
+ opt = dat + open_size;
+ length -= open_size;
i = 0;
while (i < optslen) {
- uint8_t opt_type, opt_len;
+ uint8_t opt_type;
+ uint16_t opt_len;
- ND_TCHECK_LEN(opt + i, BGP_OPT_SIZE);
- if (length < BGP_OPT_SIZE + i)
+ ND_TCHECK_LEN(opt + i, opt_size);
+ if (length < opt_size + i)
goto trunc;
bgpopt = (const struct bgp_opt *)(opt + i);
opt_type = GET_U_1(bgpopt->bgpopt_type);
- opt_len = GET_U_1(bgpopt->bgpopt_len);
- if (BGP_OPT_SIZE + i + opt_len > optslen) {
+ opt_len = extended_opt_params ? GET_BE_U_2(bgpopt->bgpopt_len)
+ : GET_U_1(bgpopt->bgpopt_len);
+ if (opt_size + i + opt_len > optslen) {
ND_PRINT("\n\t Option %u, length: %u, goes past the end of the options",
opt_type, opt_len);
break;
switch(opt_type) {
case BGP_OPT_CAP:
- bgp_capabilities_print(ndo, opt + BGP_OPT_SIZE + i,
+ bgp_capabilities_print(ndo, opt + opt_size + i,
opt_len);
break;
opt_type);
break;
}
- i += BGP_OPT_SIZE + opt_len;
+ i += opt_size + opt_len;
}
return;
trunc:
{
const u_char *p;
u_int withdrawn_routes_len;
- char buf[MAXHOSTNAMELEN + 100];
+ char buf[512];
int wpfx;
u_int len;
int i;
ND_PRINT("\n\t (illegal prefix length)");
break;
} else if (wpfx == -2)
- goto trunc;
- else if (wpfx == -3)
goto trunc; /* bytes left, but not enough */
else {
ND_PRINT("\n\t %s", buf);
}
if (len) {
+ /* Make sure the path attributes don't go past the end of the packet */
+ if (length < len)
+ goto trunc;
/* do something more useful!*/
while (len) {
uint8_t aflags, atype, alenlen;
alen);
if (aflags) {
- ND_PRINT(", Flags [%s%s%s%s",
- aflags & 0x80 ? "O" : "",
- aflags & 0x40 ? "T" : "",
- aflags & 0x20 ? "P" : "",
- aflags & 0x10 ? "E" : "");
+ ND_PRINT(", Flags [%s",
+ bittok2str_nosep(bgp_flags, "", aflags));
if (aflags & 0xf)
ND_PRINT("+%x", aflags & 0xf);
ND_PRINT("]: ");
}
if (length < alen)
goto trunc;
- if (!bgp_attr_print(ndo, atype, p, alen))
+ if (!bgp_attr_print(ndo, atype, p, alen, 0))
goto trunc;
p += alen;
len -= alen;
ND_PRINT("\n\t (illegal prefix length)");
break;
} else if (i == -2)
- goto trunc;
- else if (i == -3)
goto trunc; /* bytes left, but not enough */
else {
ND_PRINT("\n\t %s", buf);
}
static void
-bgp_notification_print(netdissect_options *ndo,
- const u_char *dat, u_int length)
+bgp_notification_print_code(netdissect_options *ndo,
+ const u_char *dat, u_int length,
+ uint8_t bgpn_major, uint8_t bgpn_minor)
{
- const struct bgp_notification *bgp_notification_header;
- const u_char *tptr;
- uint8_t bgpn_major, bgpn_minor;
- uint8_t shutdown_comm_length;
- uint8_t remainder_offset;
-
- ND_TCHECK_LEN(dat, BGP_NOTIFICATION_SIZE);
- if (length<BGP_NOTIFICATION_SIZE)
- return;
-
- bgp_notification_header = (const struct bgp_notification *)dat;
- bgpn_major = GET_U_1(bgp_notification_header->bgpn_major);
- bgpn_minor = GET_U_1(bgp_notification_header->bgpn_minor);
-
ND_PRINT(", %s (%u)",
tok2str(bgp_notify_major_values, "Unknown Error",
bgpn_major),
bgpn_minor),
bgpn_minor);
break;
- case BGP_NOTIFY_MAJOR_CAP:
+ case BGP_NOTIFY_MAJOR_ROUTEREFRESH:
ND_PRINT(" subcode %s (%u)",
- tok2str(bgp_notify_minor_cap_values, "Unknown",
+ tok2str(bgp_notify_minor_routerefresh_values, "Unknown",
bgpn_minor),
bgpn_minor);
break;
bgpn_minor),
bgpn_minor);
- /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
+ /* RFC 4486 mentions optionally 7 bytes
* for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
*/
- if(bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
- tptr = dat + BGP_NOTIFICATION_SIZE;
- ND_TCHECK_7(tptr);
+ if(bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= 7) {
ND_PRINT(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
- tok2str(af_values, "Unknown", GET_BE_U_2(tptr)),
- GET_BE_U_2(tptr),
- tok2str(bgp_safi_values, "Unknown", GET_U_1((tptr + 2))),
- GET_U_1((tptr + 2)),
- GET_BE_U_4(tptr + 3));
+ tok2str(af_values, "Unknown", GET_BE_U_2(dat)),
+ GET_BE_U_2(dat),
+ tok2str(bgp_safi_values, "Unknown", GET_U_1((dat + 2))),
+ GET_U_1((dat + 2)),
+ GET_BE_U_4(dat + 3));
}
/*
- * draft-ietf-idr-shutdown describes a method to send a communication
+ * RFC 9003 describes a method to send a communication
* intended for human consumption regarding the Administrative Shutdown
*/
if ((bgpn_minor == BGP_NOTIFY_MINOR_CEASE_SHUT ||
bgpn_minor == BGP_NOTIFY_MINOR_CEASE_RESET) &&
- length >= BGP_NOTIFICATION_SIZE + 1) {
- tptr = dat + BGP_NOTIFICATION_SIZE;
- ND_TCHECK_1(tptr);
- shutdown_comm_length = GET_U_1(tptr);
- remainder_offset = 0;
+ length >= 1) {
+ uint8_t shutdown_comm_length = GET_U_1(dat);
+ uint8_t remainder_offset = 0;
/* garbage, hexdump it all */
- if (shutdown_comm_length > BGP_NOTIFY_MINOR_CEASE_ADMIN_SHUTDOWN_LEN ||
- shutdown_comm_length > length - (BGP_NOTIFICATION_SIZE + 1)) {
+ if (shutdown_comm_length > length - 1) {
ND_PRINT(", invalid Shutdown Communication length");
- }
- else if (shutdown_comm_length == 0) {
+ } else if (shutdown_comm_length == 0) {
ND_PRINT(", empty Shutdown Communication");
remainder_offset += 1;
}
/* a proper shutdown communication */
else {
- ND_TCHECK_LEN(tptr + 1, shutdown_comm_length);
ND_PRINT(", Shutdown Communication (length: %u): \"", shutdown_comm_length);
- (void)nd_printn(ndo, tptr+1, shutdown_comm_length, NULL);
+ nd_printjn(ndo, dat+1, shutdown_comm_length);
ND_PRINT("\"");
remainder_offset += shutdown_comm_length + 1;
}
/* if there is trailing data, hexdump it */
- if(length - (remainder_offset + BGP_NOTIFICATION_SIZE) > 0) {
- ND_PRINT(", Data: (length: %u)", length - (remainder_offset + BGP_NOTIFICATION_SIZE));
- hex_print(ndo, "\n\t\t", tptr + remainder_offset, length - (remainder_offset + BGP_NOTIFICATION_SIZE));
+ if(length - remainder_offset > 0) {
+ ND_PRINT(", Data: (length: %u)", length - remainder_offset);
+ hex_print(ndo, "\n\t\t", dat + remainder_offset, length - remainder_offset);
}
}
+ /*
+ * RFC8538 describes the Hard Reset cease subcode, which contains another
+ * notification code and subcode.
+ */
+ if (bgpn_minor == BGP_NOTIFY_MINOR_CEASE_HARDRESET && length >= 2) {
+ bgpn_major = GET_U_1(dat++);
+ bgpn_minor = GET_U_1(dat++);
+ length -= 2;
+ bgp_notification_print_code(ndo, dat, length, bgpn_major, bgpn_minor);
+ }
break;
default:
+ if (bgpn_minor != 0) {
+ ND_PRINT(", subcode %u", bgpn_minor);
+ }
break;
}
return;
+}
+
+static void
+bgp_notification_print(netdissect_options *ndo,
+ const u_char *dat, u_int length)
+{
+ const struct bgp_notification *bgp_notification_header;
+ uint8_t bgpn_major, bgpn_minor;
+
+ ND_TCHECK_LEN(dat, BGP_NOTIFICATION_SIZE);
+ if (length<BGP_NOTIFICATION_SIZE)
+ return;
+
+ bgp_notification_header = (const struct bgp_notification *)dat;
+ bgpn_major = GET_U_1(bgp_notification_header->bgpn_major);
+ bgpn_minor = GET_U_1(bgp_notification_header->bgpn_minor);
+ bgp_notification_print_code(ndo, dat + BGP_NOTIFICATION_SIZE,
+ length - BGP_NOTIFICATION_SIZE, bgpn_major, bgpn_minor);
+ return;
trunc:
nd_print_trunc(ndo);
}
{
const struct bgp_route_refresh *bgp_route_refresh_header;
- ND_TCHECK_LEN(pptr, BGP_ROUTE_REFRESH_SIZE);
-
/* some little sanity checking */
if (len<BGP_ROUTE_REFRESH_SIZE)
return;
bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
- ND_PRINT("\n\t AFI %s (%u), SAFI %s (%u)",
- tok2str(af_values,"Unknown",
- GET_BE_U_2(bgp_route_refresh_header->afi)),
- GET_BE_U_2(bgp_route_refresh_header->afi),
- tok2str(bgp_safi_values,"Unknown",
- GET_U_1(bgp_route_refresh_header->safi)),
- GET_U_1(bgp_route_refresh_header->safi));
+ ND_PRINT("\n\t AFI %s (%u), SAFI %s (%u), Subtype %s (%u)",
+ tok2str(af_values, "Unknown",
+ GET_BE_U_2(bgp_route_refresh_header->afi)),
+ GET_BE_U_2(bgp_route_refresh_header->afi),
+ tok2str(bgp_safi_values, "Unknown",
+ GET_U_1(bgp_route_refresh_header->safi)),
+ GET_U_1(bgp_route_refresh_header->safi),
+ tok2str(bgp_route_refresh_subtype_values, "Unknown",
+ GET_U_1(bgp_route_refresh_header->subtype)),
+ GET_U_1(bgp_route_refresh_header->subtype));
+
+ /* ORF */
+ if (len >= BGP_ROUTE_REFRESH_SIZE_ORF) {
+ const struct bgp_route_refresh_orf *orf_header;
+
+ orf_header =
+ (const struct bgp_route_refresh_orf *)(pptr + BGP_ROUTE_REFRESH_SIZE);
+
+ ND_PRINT("\n\t ORF refresh %s (%u), ORF type %s (%u), ORF length %u",
+ tok2str(bgp_orf_refresh_type, "Unknown",
+ GET_U_1(orf_header->refresh)),
+ GET_U_1(orf_header->refresh),
+ tok2str(bgp_orf_type, "Unknown", GET_U_1(orf_header->type)),
+ GET_U_1(orf_header->type), GET_BE_U_2(orf_header->len));
+ }
if (ndo->ndo_vflag > 1) {
ND_TCHECK_LEN(pptr, len);
projects / tcpdump / blobdiff