/* * Copyright (c) 1998-2005 The TCPDUMP project * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code * distributions retain the above copyright notice and this paragraph * in its entirety, and (2) distributions including binary code include * the above copyright notice and this paragraph in its entirety in * the documentation or other materials provided with the distribution. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE. * * support for the IEEE "slow protocols" LACP, MARKER as per 802.3ad * * Original code by Hannes Gredler (hannes@juniper.net) */ #ifndef lint static const char rcsid[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/print-slow.c,v 1.1.2.1 2005/07/10 14:47:56 hannes Exp $"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include "interface.h" #include "extract.h" #include "addrtoname.h" #include "ether.h" struct slow_common_header { u_int8_t proto_subtype; u_int8_t version; }; #define SLOW_PROTO_LACP 1 #define SLOW_PROTO_MARKER 2 #define LACP_VERSION 1 #define MARKER_VERSION 1 static const struct tok slow_proto_values[] = { { SLOW_PROTO_LACP, "LACP" }, { SLOW_PROTO_MARKER, "MARKER" }, { 0, NULL} }; struct tlv_header_t { u_int8_t type; u_int8_t length; }; #define LACP_TLV_TERMINATOR 0x00 #define LACP_TLV_ACTOR_INFO 0x01 #define LACP_TLV_PARTNER_INFO 0x02 #define LACP_TLV_COLLECTOR_INFO 0x03 #define MARKER_TLV_TERMINATOR 0x00 #define MARKER_TLV_MARKER_INFO 0x01 static const struct tok slow_tlv_values[] = { { (SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR, "Terminator"}, { (SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO, "Actor Information"}, { (SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO, "Partner Information"}, { (SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO, "Collector Information"}, { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_TERMINATOR, "Terminator"}, { (SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO, "Marker Information"}, { 0, NULL} }; struct lacp_tlv_actor_partner_info_t { u_int8_t sys_pri[2]; u_int8_t sys[ETHER_ADDR_LEN]; u_int8_t key[2]; u_int8_t port_pri[2]; u_int8_t port[2]; u_int8_t state; u_int8_t pad[3]; }; static const struct tok lacp_tlv_actor_partner_info_state_values[] = { { 0x01, "Activity"}, { 0x02, "Timeout"}, { 0x04, "Aggregation"}, { 0x08, "Synchronization"}, { 0x10, "Collecting"}, { 0x20, "Distributing"}, { 0x40, "Default"}, { 0x80, "Expired"}, { 0, NULL} }; struct lacp_tlv_collector_info_t { u_int8_t max_delay[2]; u_int8_t pad[12]; }; struct marker_tlv_marker_info_t { u_int8_t req_port[2]; u_int8_t req_sys[ETHER_ADDR_LEN]; u_int8_t req_trans_id[4]; u_int8_t pad[2]; }; struct lacp_marker_tlv_terminator_t { u_int8_t pad[50]; }; void slow_print(register const u_char *pptr, register u_int len) { const struct slow_common_header *slow_com_header; const struct tlv_header_t *tlv_header; const u_char *tptr,*tlv_tptr; u_int tlv_len,tlen,tlv_tlen; union { const struct lacp_marker_tlv_terminator_t *lacp_marker_tlv_terminator; const struct lacp_tlv_actor_partner_info_t *lacp_tlv_actor_partner_info; const struct lacp_tlv_collector_info_t *lacp_tlv_collector_info; const struct marker_tlv_marker_info_t *marker_tlv_marker_info; } tlv_ptr; tptr=pptr; slow_com_header = (const struct slow_common_header *)pptr; TCHECK(*slow_com_header); /* * Sanity checking of the header. */ if (slow_com_header->proto_subtype == SLOW_PROTO_LACP && slow_com_header->version != LACP_VERSION) { printf("LACP version %u packet not supported",slow_com_header->version); return; } if (slow_com_header->proto_subtype == SLOW_PROTO_MARKER && slow_com_header->version != MARKER_VERSION) { printf("MARKER version %u packet not supported",slow_com_header->version); return; } printf("%sv%u, length: %u", tok2str(slow_proto_values, "unknown (%u)",slow_com_header->proto_subtype), slow_com_header->version, len); if (!vflag) return; /* ok they seem to want to know everything - lets fully decode it */ tlen=len-sizeof(struct slow_common_header); tptr+=sizeof(const struct slow_common_header); while(tlen>0) { /* did we capture enough for fully decoding the tlv header ? */ TCHECK2(*tptr, sizeof(struct tlv_header_t)); tlv_header = (const struct tlv_header_t *)tptr; tlv_len = tlv_header->length; printf("\n\t%s TLV (0x%02x), length: %u", tok2str(slow_tlv_values, "Unknown", (slow_com_header->proto_subtype << 8) + tlv_header->type), tlv_header->type, tlv_len); if ((tlv_len < sizeof(struct tlv_header_t) || tlv_len > tlen) && tlv_header->type != LACP_TLV_TERMINATOR && tlv_header->type != MARKER_TLV_TERMINATOR) { printf("\n\t-----trailing data-----"); print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t ",tlen); return; } tlv_tptr=tptr+sizeof(struct tlv_header_t); tlv_tlen=tlv_len-sizeof(struct tlv_header_t); /* did we capture enough for fully decoding the tlv ? */ TCHECK2(*tptr, tlv_len); switch((slow_com_header->proto_subtype << 8) + tlv_header->type) { /* those two TLVs have the same structure -> fall through */ case ((SLOW_PROTO_LACP << 8) + LACP_TLV_ACTOR_INFO): case ((SLOW_PROTO_LACP << 8) + LACP_TLV_PARTNER_INFO): tlv_ptr.lacp_tlv_actor_partner_info = (const struct lacp_tlv_actor_partner_info_t *)tlv_tptr; printf("\n\t System %s, System Priority %u, Key %u" \ ", Port %u, Port Priority %u\n\t State Flags [%s]", etheraddr_string(tlv_ptr.lacp_tlv_actor_partner_info->sys), EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->sys_pri), EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->key), EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port), EXTRACT_16BITS(tlv_ptr.lacp_tlv_actor_partner_info->port_pri), bittok2str(lacp_tlv_actor_partner_info_state_values, "none", tlv_ptr.lacp_tlv_actor_partner_info->state)); break; case ((SLOW_PROTO_LACP << 8) + LACP_TLV_COLLECTOR_INFO): tlv_ptr.lacp_tlv_collector_info = (const struct lacp_tlv_collector_info_t *)tlv_tptr; printf("\n\t Max Delay %u", EXTRACT_16BITS(tlv_ptr.lacp_tlv_collector_info->max_delay)); break; case ((SLOW_PROTO_MARKER << 8) + MARKER_TLV_MARKER_INFO): tlv_ptr.marker_tlv_marker_info = (const struct marker_tlv_marker_info_t *)tlv_tptr; printf("\n\t Request System %s, Request Port %u, Request Transaction ID 0x%08x", etheraddr_string(tlv_ptr.marker_tlv_marker_info->req_sys), EXTRACT_16BITS(tlv_ptr.marker_tlv_marker_info->req_port), EXTRACT_32BITS(tlv_ptr.marker_tlv_marker_info->req_trans_id)); break; /* those two TLVs have the same structure -> fall through */ case ((SLOW_PROTO_LACP << 8) + LACP_TLV_TERMINATOR): case ((SLOW_PROTO_MARKER << 8) + LACP_TLV_TERMINATOR): tlv_ptr.lacp_marker_tlv_terminator = (const struct lacp_marker_tlv_terminator_t *)tlv_tptr; if (tlv_len == 0) { tlv_len = sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad) + sizeof(struct tlv_header_t); /* tell the user that we modified the length field */ if (vflag>1) printf(" (=%u)",tlv_len); /* we have messed around with the length field - now we need to check * again if there are enough bytes on the wire for the hexdump */ TCHECK2(tlv_ptr.lacp_marker_tlv_terminator->pad[0], sizeof(tlv_ptr.lacp_marker_tlv_terminator->pad)); } break; default: if (vflag <= 1) print_unknown_data(tlv_tptr,"\n\t ",tlv_tlen); break; } /* do we want to see an additionally hexdump ? */ if (vflag > 1) print_unknown_data(tptr+sizeof(sizeof(struct tlv_header_t)),"\n\t ", tlv_len-sizeof(struct tlv_header_t)); tptr+=tlv_len; tlen-=tlv_len; } return; trunc: printf("\n\t\t packet exceeded snapshot"); }