+ /* IPv4 address */
+ vpn_ip = pptr;
+ pptr += sizeof(nd_ipv4);
+
+ /* MDT Group Address */
+ snprintf(buf, buflen, "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;
+
+ trunc:
+ return -2;
+}
+
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
+
+static const struct tok bgp_multicast_vpn_route_type_values[] = {
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
+ { 0, NULL}
+};
+
+static int
+decode_multicast_vpn(netdissect_options *ndo,
+ const u_char *pptr, char *buf, size_t buflen)
+{
+ /* 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;
+
+ route_type = GET_U_1(pptr);
+ pptr++;
+ route_length = GET_U_1(pptr);
+ pptr++;
+
+ snprintf(buf, buflen, "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",
+ 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)));
+ 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));
+ pptr += BGP_VPN_RD_LEN;
+
+ sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ 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));
+ 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));
+ pptr += BGP_VPN_RD_LEN;
+
+ bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ 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)));
+ pptr += BGP_VPN_RD_LEN + 4;
+
+ bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ break;
+
+ /*
+ * no per route-type printing yet.
+ */
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
+ default:
+ break;
+ }
+
+ return route_length + 2;
+
+trunc:
+ 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)
+{
+ u_int plen, tlen, tlv_type, tlv_len, ttlv_len;
+ int stringlen;
+
+ plen = GET_BE_U_2(pptr);
+ tlen = plen;
+ pptr += 2;
+ /* Old and new L2VPN NLRI share AFI/SAFI
+ * -> Assume a 12 Byte-length NLRI is auto-discovery-only
+ * and > 17 as old format. Complain for the middle case
+ */
+ 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",
+ bgp_vpn_rd_print(ndo, pptr),
+ GET_IPADDR_STRING(pptr+8));
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ pptr += 12;
+ tlen -= 12;
+ 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",
+ 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);
+ }
+ return plen + 2;
+ }
+ tlv_type = GET_U_1(pptr);
+ pptr++;
+ tlv_len = GET_BE_U_2(pptr); /* length, in *bits* */
+ ttlv_len = (tlv_len + 7)/8; /* length, in *bytes* */
+ pptr += 2;
+
+ 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);
+ }
+ while (ttlv_len != 0) {
+ if (tlen < 1) {
+ if (buflen != 0) {
+ stringlen=snprintf(buf,buflen, " (ran past the end)");
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ 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);
+ }
+ 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);
+ }
+ if (tlen < ttlv_len) {
+ if (buflen != 0) {
+ stringlen=snprintf(buf,buflen, " (ran past the end)");
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ return plen + 2;
+ }
+ tlen -= ttlv_len;
+ break;
+ }
+ }
+ return plen + 2;
+ } else {
+ /* complain bitterly ? */
+ /* fall through */
+ goto trunc;
+ }
+
+trunc:
+ return -2;
+}
+
+int
+decode_prefix6(netdissect_options *ndo,
+ const u_char *pd, u_int itemlen, char *buf, size_t buflen)
+{
+ nd_ipv6 addr;
+ u_int plen, plenbytes;
+
+ ITEMCHECK(1);
+ plen = GET_U_1(pd);
+ if (128 < plen)
+ return -1;
+ itemlen -= 1;
+
+ memset(&addr, 0, sizeof(addr));
+ plenbytes = (plen + 7) / 8;
+ ITEMCHECK(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;
+
+badtlv:
+ return -2;
+}
+
+static int
+decode_labeled_prefix6(netdissect_options *ndo,
+ const u_char *pptr, u_int itemlen, char *buf, size_t buflen)
+{
+ nd_ipv6 addr;
+ u_int plen, plenbytes;
+
+ /* prefix length and label = 4 bytes */
+ ND_TCHECK_4(pptr);
+ ITEMCHECK(4);
+ plen = GET_U_1(pptr); /* get prefix length */
+
+ if (24 > plen)
+ return -1;
+
+ plen -= 24; /* adjust prefixlen - labellength */
+
+ if (128 < plen)
+ return -1;
+ itemlen -= 4;
+
+ memset(&addr, 0, sizeof(addr));
+ plenbytes = (plen + 7) / 8;
+ 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",
+ ip6addr_string(ndo, (const u_char *)&addr),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 4 + plenbytes;
+
+trunc:
+ return -2;
+
+badtlv:
+ return -3;
+}
+
+static int
+decode_labeled_vpn_prefix6(netdissect_options *ndo,
+ const u_char *pptr, char *buf, size_t buflen)
+{
+ nd_ipv6 addr;
+ u_int plen;
+
+ plen = GET_U_1(pptr); /* get prefix length */
+
+ if ((24+64) > plen)
+ return -1;
+
+ plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
+
+ if (128 < plen)
+ return -1;
+
+ memset(&addr, 0, sizeof(addr));
+ 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",
+ bgp_vpn_rd_print(ndo, pptr+4),
+ ip6addr_string(ndo, (const u_char *)&addr),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 12 + (plen + 7) / 8;
+}
+
+static int
+decode_clnp_prefix(netdissect_options *ndo,
+ const u_char *pptr, char *buf, size_t buflen)
+{
+ uint8_t addr[19];
+ u_int plen;
+
+ plen = GET_U_1(pptr); /* get prefix length */
+
+ if (152 < plen)
+ return -1;
+
+ memset(&addr, 0, sizeof(addr));
+ GET_CPY_BYTES(&addr, pptr + 4, (plen + 7) / 8);
+ if (plen % 8) {
+ addr[(plen + 7) / 8 - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */
+ snprintf(buf, buflen, "%s/%u",
+ isonsap_string(ndo, addr,(plen + 7) / 8),
+ plen);
+
+ return 1 + (plen + 7) / 8;
+}
+
+static int
+decode_labeled_vpn_clnp_prefix(netdissect_options *ndo,
+ const u_char *pptr, char *buf, size_t buflen)
+{
+ uint8_t addr[19];
+ u_int plen;
+
+ plen = GET_U_1(pptr); /* get prefix length */
+
+ if ((24+64) > plen)
+ return -1;
+
+ plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
+
+ if (152 < plen)
+ return -1;
+
+ memset(&addr, 0, sizeof(addr));
+ 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 */
+ /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */
+ snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s",
+ bgp_vpn_rd_print(ndo, pptr+4),
+ isonsap_string(ndo, addr,(plen + 7) / 8),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 12 + (plen + 7) / 8;
+}
+
+/*
+ * bgp_attr_get_as_size
+ *
+ * Try to find the size of the ASs encoded in an as-path. It is not obvious, as
+ * both Old speakers that do not support 4 byte AS, and the new speakers that do
+ * support, exchange AS-Path with the same path-attribute type value 0x02.
+ */
+static u_int
+bgp_attr_get_as_size(netdissect_options *ndo,
+ uint8_t bgpa_type, const u_char *pptr, u_int len)
+{
+ const u_char *tptr = pptr;
+
+ /*
+ * If the path attribute is the optional AS4 path type, then we already
+ * know, that ASs must be encoded in 4 byte format.
+ */
+ if (bgpa_type == BGPTYPE_AS4_PATH) {
+ return 4;
+ }
+
+ /*
+ * Let us assume that ASs are of 2 bytes in size, and check if the AS-Path
+ * TLV is good. If not, ask the caller to try with AS encoded as 4 bytes
+ * each.
+ */
+ while (tptr < pptr + len) {
+ /*
+ * 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;
+ }
+ tptr += 2 + GET_U_1(tptr + 1) * 2;
+ }
+
+ /*
+ * If we correctly reached end of the AS path attribute data content,
+ * then most likely ASs were indeed encoded as 2 bytes.
+ */
+ if (tptr == pptr + len) {
+ return 2;
+ }
+
+trunc:
+
+ /*
+ * 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
+ * there was not enough data, it will crib and end the parse anyways.
+ */
+ return 4;
+}
+
+/*
+ * The only way to know that a BGP UPDATE message is using add path is
+ * by checking if the capability is in the OPEN message which we may have missed.
+ * So this function checks if it is possible that the update could contain add path
+ * and if so it checks that standard BGP doesn't make sense.
+ */
+static int
+check_add_path(netdissect_options *ndo, const u_char *pptr, u_int length,
+ u_int max_prefix_length)
+{
+ u_int offset, prefix_length;
+
+ if (length < 5) {
+ return 0;
+ }
+
+ /*
+ * Scan through the NLRI information under the assumpetion that
+ * it doesn't have path IDs.
+ */
+ for (offset = 0; offset < length;) {
+ offset += 4;
+ if (!ND_TTEST_1(pptr + offset)) {
+ /* We ran out of captured data; quit scanning. */
+ break;
+ }
+ prefix_length = GET_U_1(pptr + offset);
+ /*
+ * Add 4 to cover the path id
+ * and check the prefix length isn't greater than 32/128.
+ */
+ if (prefix_length > max_prefix_length) {
+ return 0;
+ }
+ /* Add 1 for the prefix_length byte and prefix_length to cover the address */
+ offset += 1 + ((prefix_length + 7) / 8);
+ }
+ /* check we haven't gone past the end of the section */
+ if (offset > length) {
+ return 0;
+ }
+
+ /* check it's not standard BGP */
+ for (offset = 0; offset < length; ) {
+ if (!ND_TTEST_1(pptr + offset)) {
+ /* We ran out of captured data; quit scanning. */
+ break;
+ }
+ prefix_length = GET_U_1(pptr + offset);
+ /*
+ * If the prefix_length is zero (0.0.0.0/0)
+ * and since it's not the only address (length >= 5)
+ * then it is add-path
+ */
+ if (prefix_length < 1 || prefix_length > max_prefix_length) {
+ return 1;
+ }
+ offset += 1 + ((prefix_length + 7) / 8);
+ }
+ if (offset > length) {
+ return 1;
+ }
+
+ /* assume not add-path by default */
+ return 0;
+}
+
+static int
+bgp_mp_af_print(netdissect_options *ndo,
+ const u_char *tptr, u_int tlen,
+ uint16_t *afp, uint8_t *safip)
+{
+ uint16_t af;
+ uint8_t safi;
+
+ af = GET_BE_U_2(tptr);
+ *afp = af;
+ safi = GET_U_1(tptr + 2);
+ *safip = safi;
+
+ ND_PRINT("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
+ tok2str(af_values, "Unknown AFI", af),
+ af,
+ (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
+ tok2str(bgp_safi_values, "Unknown SAFI", safi),
+ 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_NSAP<<8 | SAFNUM_UNICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
+ break;
+ default:
+ ND_TCHECK_LEN(tptr, tlen);
+ ND_PRINT("\n\t no AFI %u / SAFI %u decoder", af, safi);
+ if (ndo->ndo_vflag <= 1)
+ print_unknown_data(ndo, tptr, "\n\t ", tlen);
+ return -1;
+ }
+ return 0;
+trunc:
+ return -2;
+}
+
+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;
+
+ switch (af<<8 | safi) {
+ case (AFNUM_INET<<8 | SAFNUM_UNICAST):
+ case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
+ if (add_path4) {
+ path_id = GET_BE_U_4(tptr);
+ tptr += 4;
+ }
+ advance = decode_prefix4(ndo, tptr, len, buf, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ break; /* bytes left, but not enough */
+ else
+ ND_PRINT("\n\t %s", buf);
+ if (add_path4) {
+ ND_PRINT(" Path Id: %u", path_id);
+ 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)
+ 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
+ ND_PRINT("\n\t %s", buf);
+ break;
+ case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
+ advance = decode_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)
+ 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)
+ 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):
+ if (add_path6) {
+ path_id = GET_BE_U_4(tptr);
+ tptr += 4;
+ }
+ advance = decode_prefix6(ndo, tptr, len, buf, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ break; /* bytes left, but not enough */
+ else
+ ND_PRINT("\n\t %s", buf);
+ if (add_path6) {
+ ND_PRINT(" Path Id: %u", path_id);
+ 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)
+ 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
+ ND_PRINT("\n\t %s", buf);
+ 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)
+ 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
+ ND_PRINT("\n\t %s", buf);
+ 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
+ ND_PRINT("\n\t %s", buf);
+ break;
+ default:
+ /*
+ * This should not happen, we should have been protected
+ * by bgp_mp_af_print()'s return value.
+ */
+ ND_PRINT("\n\t ERROR: no AFI %u / SAFI %u decoder", af, safi);
+ advance = -4;
+ break;
projects / tcpdump / blobdiff