+/*
+ * Print DCBX Protocol fields (V 1.01).
+ */
+static int
+lldp_private_dcbx_print(const u_char *pptr, u_int len)
+{
+ int subtype, hexdump = FALSE;
+ u_int8_t tval;
+ u_int16_t tlv;
+ u_int32_t i, pgval, uval;
+ u_int tlen, tlv_type, tlv_len;
+ const u_char *tptr, *mptr;
+
+ if (len < 4) {
+ return hexdump;
+ }
+ subtype = *(pptr+3);
+
+ printf("\n\t %s Subtype (%u)",
+ tok2str(lldp_dcbx_subtype_values, "unknown", subtype),
+ subtype);
+
+ /* by passing old version */
+ if (subtype == LLDP_DCBX_SUBTYPE_1)
+ return TRUE;
+
+ tptr = pptr + 4;
+ tlen = len - 4;
+
+ while (tlen >= sizeof(tlv)) {
+
+ TCHECK2(*tptr, sizeof(tlv));
+
+ tlv = EXTRACT_16BITS(tptr);
+
+ tlv_type = LLDP_EXTRACT_TYPE(tlv);
+ tlv_len = LLDP_EXTRACT_LEN(tlv);
+ hexdump = FALSE;
+
+ tlen -= sizeof(tlv);
+ tptr += sizeof(tlv);
+
+ /* loop check */
+ if (!tlv_type || !tlv_len) {
+ break;
+ }
+
+ TCHECK2(*tptr, tlv_len);
+ if (tlen < tlv_len) {
+ goto trunc;
+ }
+
+ /* decode every tlv */
+ switch (tlv_type) {
+ case LLDP_DCBX_CONTROL_TLV:
+ if (tlv_len < 10) {
+ goto trunc;
+ }
+ printf("\n\t Control - Protocol Control (type 0x%x, length %d)",
+ LLDP_DCBX_CONTROL_TLV, tlv_len);
+ printf("\n\t Oper_Version: %d", *tptr);
+ printf("\n\t Max_Version: %d", *(tptr+1));
+ printf("\n\t Sequence Number: %d", EXTRACT_32BITS(tptr+2));
+ printf("\n\t Acknowledgement Number: %d",
+ EXTRACT_32BITS(tptr+6));
+ break;
+ case LLDP_DCBX_PRIORITY_GROUPS_TLV:
+ if (tlv_len < 17) {
+ goto trunc;
+ }
+ printf("\n\t Feature - Priority Group (type 0x%x, length %d)",
+ LLDP_DCBX_PRIORITY_GROUPS_TLV, tlv_len);
+ printf("\n\t Oper_Version: %d", *tptr);
+ printf("\n\t Max_Version: %d", *(tptr+1));
+ printf("\n\t Info block(0x%02X): ", *(tptr+2));
+ tval = *(tptr+2);
+ printf("Enable bit: %d, Willing bit: %d, Error Bit: %d",
+ (tval & 0x80) ? 1 : 0, (tval & 0x40) ? 1 : 0,
+ (tval & 0x20) ? 1 : 0);
+ printf("\n\t SubType: %d", *(tptr+3));
+ printf("\n\t Priority Allocation");
+
+ pgval = EXTRACT_32BITS(tptr+4);
+ for (i = 0; i <= 7; i++) {
+ tval = *(tptr+4+(i/2));
+ printf("\n\t PgId_%d: %d",
+ i, (pgval >> (28-4*i)) & 0xF);
+ }
+ printf("\n\t Priority Group Allocation");
+ for (i = 0; i <= 7; i++)
+ printf("\n\t Pg percentage[%d]: %d", i, *(tptr+8+i));
+ printf("\n\t NumTCsSupported: %d", *(tptr+8+8));
+ break;
+ case LLDP_DCBX_PRIORITY_FLOW_CONTROL_TLV:
+ if (tlv_len < 6) {
+ goto trunc;
+ }
+ printf("\n\t Feature - Priority Flow Control");
+ printf(" (type 0x%x, length %d)",
+ LLDP_DCBX_PRIORITY_FLOW_CONTROL_TLV, tlv_len);
+ printf("\n\t Oper_Version: %d", *tptr);
+ printf("\n\t Max_Version: %d", *(tptr+1));
+ printf("\n\t Info block(0x%02X): ", *(tptr+2));
+ tval = *(tptr+2);
+ printf("Enable bit: %d, Willing bit: %d, Error Bit: %d",
+ (tval & 0x80) ? 1 : 0, (tval & 0x40) ? 1 : 0,
+ (tval & 0x20) ? 1 : 0);
+ printf("\n\t SubType: %d", *(tptr+3));
+ tval = *(tptr+4);
+ printf("\n\t PFC Config (0x%02X)", *(tptr+4));
+ for (i = 0; i <= 7; i++)
+ printf("\n\t Priority Bit %d: %s",
+ i, (tval & (1 << i)) ? "Enabled" : "Disabled");
+ printf("\n\t NumTCPFCSupported: %d", *(tptr+5));
+ break;
+ case LLDP_DCBX_APPLICATION_TLV:
+ if (tlv_len < 4) {
+ goto trunc;
+ }
+ printf("\n\t Feature - Application (type 0x%x, length %d)",
+ LLDP_DCBX_APPLICATION_TLV, tlv_len);
+ printf("\n\t Oper_Version: %d", *tptr);
+ printf("\n\t Max_Version: %d", *(tptr+1));
+ printf("\n\t Info block(0x%02X): ", *(tptr+2));
+ tval = *(tptr+2);
+ printf("Enable bit: %d, Willing bit: %d, Error Bit: %d",
+ (tval & 0x80) ? 1 : 0, (tval & 0x40) ? 1 : 0,
+ (tval & 0x20) ? 1 : 0);
+ printf("\n\t SubType: %d", *(tptr+3));
+ tval = tlv_len - 4;
+ mptr = tptr + 4;
+ while (tval >= 6) {
+ printf("\n\t Application Value");
+ printf("\n\t Application Protocol ID: 0x%04x",
+ EXTRACT_16BITS(mptr));
+ uval = EXTRACT_24BITS(mptr+2);
+ printf("\n\t SF (0x%x) Application Protocol ID is %s",
+ (uval >> 22),
+ (uval >> 22) ? "Socket Number" : "L2 EtherType");
+ printf("\n\t OUI: 0x%06x", uval & 0x3fffff);
+ printf("\n\t User Priority Map: 0x%02x", *(mptr+5));
+ tval = tval - 6;
+ mptr = mptr + 6;
+ }
+ break;
+ default:
+ hexdump = TRUE;
+ break;
+ }
+
+ /* do we also want to see a hex dump ? */
+ if (vflag > 1 || (vflag && hexdump)) {
+ print_unknown_data(tptr,"\n\t ", tlv_len);
+ }
+
+ tlen -= tlv_len;
+ tptr += tlv_len;
+ }
+
+ trunc:
+ return hexdump;
+}
+
projects / tcpdump / blobdiff