+ ndo->ndo_ll_hdr_len += hdrlen;
+ ndo->ndo_ll_hdr_len += atm_llc_print(ndo, p, length, caplen);
+}
+
+/*
+ * ATM signalling.
+ */
+static const struct tok msgtype2str[] = {
+ { CALL_PROCEED, "Call_proceeding" },
+ { CONNECT, "Connect" },
+ { CONNECT_ACK, "Connect_ack" },
+ { SETUP, "Setup" },
+ { RELEASE, "Release" },
+ { RELEASE_DONE, "Release_complete" },
+ { RESTART, "Restart" },
+ { RESTART_ACK, "Restart_ack" },
+ { STATUS, "Status" },
+ { STATUS_ENQ, "Status_enquiry" },
+ { ADD_PARTY, "Add_party" },
+ { ADD_PARTY_ACK, "Add_party_ack" },
+ { ADD_PARTY_REJ, "Add_party_reject" },
+ { DROP_PARTY, "Drop_party" },
+ { DROP_PARTY_ACK, "Drop_party_ack" },
+ { 0, NULL }
+};
+
+static void
+sig_print(netdissect_options *ndo,
+ const u_char *p)
+{
+ uint32_t call_ref;
+
+ if (GET_U_1(p + PROTO_POS) == Q2931) {
+ /*
+ * protocol:Q.2931 for User to Network Interface
+ * (UNI 3.1) signalling
+ */
+ ND_PRINT("Q.2931");
+ ND_PRINT(":%s ",
+ tok2str(msgtype2str, "msgtype#%u", GET_U_1(p + MSG_TYPE_POS)));
+
+ /*
+ * The call reference comes before the message type,
+ * so if we know we have the message type, which we
+ * do from the caplen test above, we also know we have
+ * the call reference.
+ */
+ call_ref = GET_BE_U_3(p + CALL_REF_POS);
+ ND_PRINT("CALL_REF:0x%06x", call_ref);
+ } else {
+ /* SSCOP with some unknown protocol atop it */
+ ND_PRINT("SSCOP, proto %u ", GET_U_1(p + PROTO_POS));
+ }
+}
+
+/*
+ * Print an ATM PDU (such as an AAL5 PDU).
+ */
+void
+atm_print(netdissect_options *ndo,
+ u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
+ u_int caplen)
+{
+ ndo->ndo_protocol = "atm";
+ if (ndo->ndo_eflag)
+ ND_PRINT("VPI:%u VCI:%u ", vpi, vci);
+
+ if (vpi == 0) {
+ switch (vci) {
+
+ case VCI_PPC:
+ sig_print(ndo, p);
+ return;
+
+ case VCI_BCC:
+ ND_PRINT("broadcast sig: ");
+ return;
+
+ case VCI_OAMF4SC: /* fall through */
+ case VCI_OAMF4EC:
+ oam_print(ndo, p, length, ATM_OAM_HEC);
+ return;
+
+ case VCI_METAC:
+ ND_PRINT("meta: ");
+ return;
+
+ case VCI_ILMIC:
+ ND_PRINT("ilmi: ");
+ snmp_print(ndo, p, length);
+ return;
+ }
+ }
+
+ switch (traftype) {
+
+ case ATM_LLC:
+ default:
+ /*
+ * Assumes traffic is LLC if unknown.
+ */
+ atm_llc_print(ndo, p, length, caplen);
+ break;
+
+ case ATM_LANE:
+ lane_print(ndo, p, length, caplen);
+ break;
+ }
+}
+
+struct oam_fm_loopback_t {
+ nd_uint8_t loopback_indicator;
+ nd_uint32_t correlation_tag;
+ nd_byte loopback_id[12];
+ nd_byte source_id[12];
+ nd_byte unused[16];
+};
+
+struct oam_fm_ais_rdi_t {
+ nd_uint8_t failure_type;
+ nd_byte failure_location[16];
+ nd_byte unused[28];
+};
+
+void
+oam_print(netdissect_options *ndo,
+ const u_char *p, u_int length, u_int hec)
+{
+ uint32_t cell_header;
+ uint16_t vpi, vci, cksum, cksum_shouldbe, idx;
+ uint8_t cell_type, func_type, payload, clp;
+ const struct tok *oam_functype_str;
+
+ union {
+ const struct oam_fm_loopback_t *oam_fm_loopback;
+ const struct oam_fm_ais_rdi_t *oam_fm_ais_rdi;
+ } oam_ptr;
+
+ ndo->ndo_protocol = "oam";
+ cell_header = GET_BE_U_4(p + hec);
+ cell_type = (GET_U_1((p + ATM_HDR_LEN_NOHEC + hec)) >> 4) & 0x0f;
+ func_type = GET_U_1((p + ATM_HDR_LEN_NOHEC + hec)) & 0x0f;
+
+ vpi = (cell_header>>20)&0xff;
+ vci = (cell_header>>4)&0xffff;
+ payload = (cell_header>>1)&0x7;
+ clp = cell_header&0x1;
+
+ ND_PRINT("%s, vpi %u, vci %u, payload [ %s ], clp %u, length %u",
+ tok2str(oam_f_values, "OAM F5", vci),
+ vpi, vci,
+ tok2str(atm_pty_values, "Unknown", payload),
+ clp, length);
+
+ if (!ndo->ndo_vflag) {
+ return;
+ }
+
+ ND_PRINT("\n\tcell-type %s (%u)",
+ tok2str(oam_celltype_values, "unknown", cell_type),
+ cell_type);
+
+ oam_functype_str = uint2tokary(oam_celltype2tokary, cell_type);
+ if (oam_functype_str == NULL)
+ ND_PRINT(", func-type unknown (%u)", func_type);
+ else
+ ND_PRINT(", func-type %s (%u)",
+ tok2str(oam_functype_str, "none", func_type),
+ func_type);
+
+ p += ATM_HDR_LEN_NOHEC + hec;
+
+ switch (cell_type << 4 | func_type) {
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
+ oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+ ND_TCHECK_SIZE(oam_ptr.oam_fm_loopback);
+ ND_PRINT("\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
+ tok2str(oam_fm_loopback_indicator_values,
+ "Unknown",
+ GET_U_1(oam_ptr.oam_fm_loopback->loopback_indicator) & OAM_FM_LOOPBACK_INDICATOR_MASK),
+ GET_BE_U_4(oam_ptr.oam_fm_loopback->correlation_tag));
+ ND_PRINT("\n\tLocation-ID ");
+ for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
+ if (idx % 2) {
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_loopback->loopback_id[idx]));
+ }
+ }
+ ND_PRINT("\n\tSource-ID ");
+ for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
+ if (idx % 2) {
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_loopback->source_id[idx]));
+ }
+ }
+ break;
+
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
+ oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+ ND_TCHECK_SIZE(oam_ptr.oam_fm_ais_rdi);
+ ND_PRINT("\n\tFailure-type 0x%02x",
+ GET_U_1(oam_ptr.oam_fm_ais_rdi->failure_type));
+ ND_PRINT("\n\tLocation-ID ");
+ for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
+ if (idx % 2) {
+ ND_PRINT("%04x ",
+ GET_BE_U_2(&oam_ptr.oam_fm_ais_rdi->failure_location[idx]));
+ }
+ }
+ break;
+
+ case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_CONTCHECK):
+ /* FIXME */
+ break;
+
+ default:
+ break;
+ }
+
+ /* crc10 checksum verification */
+ cksum = GET_BE_U_2(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
+ & OAM_CRC10_MASK;
+ cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
+
+ ND_PRINT("\n\tcksum 0x%03x (%scorrect)",
+ cksum,
+ cksum_shouldbe == 0 ? "" : "in");
projects / tcpdump / blobdiff