/* packet-fc.c * Routines for Fibre Channel Decoding (FC Header, Link Ctl & Basic Link Svc) * Copyright 2001, Dinesh G Dutt * Copyright 2003 Ronnie Sahlberg, exchange first/last matching and * tap listener and misc updates * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #ifdef HAVE_SYS_TYPES_H # include #endif #ifdef HAVE_NETINET_IN_H # include #endif #include #include #include #include #include #include #include "packet-scsi.h" #include "packet-fc.h" #include "packet-fclctl.h" #include "packet-fcbls.h" #include #include #include #include #define FC_HEADER_SIZE 24 #define FC_RCTL_VFT 0x50 #define MDSHDR_TRAILER_SIZE 6 /* Size of various fields in FC header in bytes */ #define FC_RCTL_SIZE 1 #define FC_DID_SIZE 3 #define FC_CSCTL_SIZE 1 #define FC_SID_SIZE 3 #define FC_TYPE_SIZE 1 #define FC_FCTL_SIZE 3 #define FC_SEQID_SIZE 1 #define FC_DFCTL_SIZE 1 #define FC_SEQCNT_SIZE 2 #define FC_OXID_SIZE 2 #define FC_RXID_SIZE 2 #define FC_PARAM_SIZE 4 /* Initialize the protocol and registered fields */ static int proto_fc = -1; static int hf_fc_time = -1; static int hf_fc_exchange_first_frame = -1; static int hf_fc_exchange_last_frame = -1; static int hf_fc_rctl = -1; static int hf_fc_did = -1; static int hf_fc_csctl = -1; static int hf_fc_sid = -1; static int hf_fc_id = -1; static int hf_fc_type = -1; static int hf_fc_fctl = -1; static int hf_fc_fctl_exchange_responder = -1; static int hf_fc_fctl_seq_recipient = -1; static int hf_fc_fctl_exchange_first = -1; static int hf_fc_fctl_exchange_last = -1; static int hf_fc_fctl_seq_last = -1; static int hf_fc_fctl_priority = -1; static int hf_fc_fctl_transfer_seq_initiative = -1; static int hf_fc_fctl_rexmitted_seq = -1; static int hf_fc_fctl_rel_offset = -1; static int hf_fc_fctl_abts_ack = -1; static int hf_fc_fctl_abts_not_ack = -1; static int hf_fc_fctl_last_data_frame = -1; static int hf_fc_fctl_ack_0_1 = -1; static int hf_fc_seqid = -1; static int hf_fc_dfctl = -1; static int hf_fc_seqcnt = -1; static int hf_fc_oxid = -1; static int hf_fc_rxid = -1; static int hf_fc_param = -1; static int hf_fc_ftype = -1; /* Derived field, non-existent in FC hdr */ static int hf_fc_reassembled = -1; static int hf_fc_relative_offset = -1; /* VFT fields */ static int hf_fc_vft = -1; static int hf_fc_vft_rctl = -1; static int hf_fc_vft_ver = -1; static int hf_fc_vft_type = -1; static int hf_fc_vft_pri = -1; static int hf_fc_vft_vf_id = -1; static int hf_fc_vft_hop_ct = -1; /* Network_Header fields */ static int hf_fc_nh_da = -1; static int hf_fc_nh_sa = -1; /* For Basic Link Svc */ static int hf_fc_bls_seqid_vld = -1; static int hf_fc_bls_lastvld_seqid = -1; static int hf_fc_bls_oxid = -1; static int hf_fc_bls_rxid = -1; static int hf_fc_bls_lowseqcnt = -1; static int hf_fc_bls_hiseqcnt = -1; static int hf_fc_bls_rjtcode = -1; static int hf_fc_bls_rjtdetail = -1; static int hf_fc_bls_vendor = -1; /* For FC SOF */ static int proto_fcsof = -1; static int hf_fcsof = -1; static int hf_fceof = -1; static int hf_fccrc = -1; static int ett_fcsof = -1; static int ett_fceof = -1; static int ett_fccrc = -1; /* Initialize the subtree pointers */ static gint ett_fc = -1; static gint ett_fctl = -1; static gint ett_fcbls = -1; static gint ett_fc_vft = -1; static dissector_table_t fcftype_dissector_table; static dissector_handle_t data_handle, fc_handle; static int fc_tap = -1; typedef struct _fc_conv_data_t { emem_tree_t *exchanges; } fc_conv_data_t; /* Reassembly stuff */ static gboolean fc_reassemble = TRUE; static guint32 fc_max_frame_size = 1024; static GHashTable *fc_fragment_table = NULL; typedef struct _fcseq_conv_key { guint32 conv_idx; } fcseq_conv_key_t; typedef struct _fcseq_conv_data { guint32 seq_cnt; } fcseq_conv_data_t; static GHashTable *fcseq_req_hash = NULL; /* * Hash Functions */ static gint fcseq_equal(gconstpointer v, gconstpointer w) { const fcseq_conv_key_t *v1 = v; const fcseq_conv_key_t *v2 = w; return (v1->conv_idx == v2->conv_idx); } static guint fcseq_hash (gconstpointer v) { const fcseq_conv_key_t *key = v; guint val; val = key->conv_idx; return val; } static void fc_exchange_init_protocol(void) { fragment_table_init(&fc_fragment_table); if (fcseq_req_hash) g_hash_table_destroy(fcseq_req_hash); fcseq_req_hash = g_hash_table_new(fcseq_hash, fcseq_equal); } const value_string fc_fc4_val[] = { {FC_TYPE_BLS, "Basic Link Svc"}, {FC_TYPE_ELS, "Ext Link Svc"}, {FC_TYPE_LLCSNAP, "LLC_SNAP"}, {FC_TYPE_IP, "IP/FC"}, {FC_TYPE_SCSI, "FCP"}, {FC_TYPE_FCCT, "FC_CT"}, {FC_TYPE_SWILS, "SW_ILS"}, {FC_TYPE_AL, "AL"}, {FC_TYPE_SNMP, "SNMP"}, {FC_TYPE_SB_FROM_CU, "SB-3(CU->Channel)"}, {FC_TYPE_SB_TO_CU, "SB-3(Channel->CU)"}, {0, NULL} }; static const value_string fc_ftype_vals [] = { {FC_FTYPE_UNDEF , "Unknown frame"}, {FC_FTYPE_SWILS, "SW_ILS"}, {FC_FTYPE_IP , "IP/FC"}, {FC_FTYPE_SCSI , "FCP"}, {FC_FTYPE_BLS , "Basic Link Svc"}, {FC_FTYPE_ELS , "ELS"}, {FC_FTYPE_FCCT , "FC_CT"}, {FC_FTYPE_LINKDATA, "Link Data"}, {FC_FTYPE_VDO, "Video Data"}, {FC_FTYPE_LINKCTL, "Link Ctl"}, {FC_FTYPE_SBCCS, "SBCCS"}, {FC_FTYPE_OHMS, "OHMS(Cisco MDS)"}, {0, NULL} }; static const value_string fc_wka_vals[] _U_ = { {FC_WKA_MULTICAST, "Multicast Server"}, {FC_WKA_CLKSYNC, "Clock Sync Server"}, {FC_WKA_KEYDIST, "Key Distribution Server"}, {FC_WKA_ALIAS, "Alias Server"}, {FC_WKA_QOSF, "QoS Facilitator"}, {FC_WKA_MGMT, "Management Server"}, {FC_WKA_TIME, "Time Server"}, {FC_WKA_DNS, "Directory Server"}, {FC_WKA_FABRIC_CTRLR, "Fabric Ctlr"}, {FC_WKA_FPORT, "F_Port Server"}, {FC_WKA_BCAST, "Broadcast ID"}, {0, NULL} }; static const value_string fc_routing_val[] = { {FC_RCTL_DEV_DATA, "Device_Data"}, {FC_RCTL_ELS, "Extended Link Services"}, {FC_RCTL_LINK_DATA, "FC-4 Link_Data"}, {FC_RCTL_VIDEO, "Video_Data"}, {FC_RCTL_BLS, "Basic Link Services"}, {FC_RCTL_LINK_CTL, "Link_Control Frame"}, {0, NULL} }; static const value_string fc_iu_val[] = { {FC_IU_UNCATEGORIZED , "Uncategorized Data"}, {FC_IU_SOLICITED_DATA , "Solicited Data"}, {FC_IU_UNSOLICITED_CTL , "Unsolicited Control"}, {FC_IU_SOLICITED_CTL , "Solicited Control"}, {FC_IU_UNSOLICITED_DATA, "Solicited Data"}, {FC_IU_DATA_DESCRIPTOR , "Data Descriptor"}, {FC_IU_UNSOLICITED_CMD , "Unsolicited Command"}, {FC_IU_CMD_STATUS , "Command Status"}, {0, NULL} }; /* For FC SOF */ #define FC_SOFC1 0xBCB51717 #define FC_SOFI1 0xBCB55757 #define FC_SOFN1 0xBCB53737 #define FC_SOFI2 0xBCB55555 #define FC_SOFN2 0xBCB53535 #define FC_SOFI3 0xBCB55656 #define FC_SOFN3 0xBCB53636 #define FC_SOFC4 0xBCB51919 #define FC_SOFI4 0xBCB55959 #define FC_SOFN4 0xBCB53939 #define FC_SOFF 0xBCB55858 #define EOFT_NEG 0xBC957575 #define EOFT_POS 0xBCB57575 #define EOFDT_NEG 0xBC959595 #define EOFDT_POS 0xBCB59595 #define EOFA_NEG 0xBC95F5F5 #define EOFA_POS 0xBCB5F5F5 #define EOFNI_NEG 0xBC8AD5D5 #define EOFNI_POS 0xBCAAD5D5 #define EOFDTI_NEG 0xBC8A9595 #define EOFDTI_POS 0xBCAA9595 #define EOFRI_NEG 0xBC959999 #define EOFRI_POS 0xBCB59999 #define EOFRTI_NEG 0xBC8A9999 #define EOFRTI_POS 0xBCAA9999 static const value_string fc_sof_vals[] = { {FC_SOFC1, "SOFc1 - SOF Connect Class 1 (Obsolete)" }, {FC_SOFI1, "SOFi1 - SOF Initiate Class 1 (Obsolete)" }, {FC_SOFN1, "SOFn1 - SOF Normal Class 1 (Obsolete)" }, {FC_SOFI2, "SOFi2 - SOF Initiate Class 2" }, {FC_SOFN2, "SOFn2 - SOF Normal Class 2" }, {FC_SOFI3, "SOFi3 - SOF Initiate Class 3" }, {FC_SOFN3, "SOFn3 - SOF Normal Class 3" }, {FC_SOFC4, "SOFc4 - SOF Activate Class 4 (Obsolete)" }, {FC_SOFI4, "SOFi4 - SOF Initiate Class 4 (Obsolete)" }, {FC_SOFN4, "SOFn4 - SOF Normal Class 4 (Obsolete)" }, {FC_SOFF, "SOFf - SOF Fabric" }, {0, NULL} }; static const value_string fc_eof_vals[] = { {EOFT_NEG, "EOFt- - EOF Terminate" }, {EOFT_POS, "EOFT+ - EOF Terminate" }, {EOFDT_NEG, "EOFdt- - EOF Disconnect-Terminate-Class 1 (Obsolete)" }, {EOFDT_POS, "EOFdt+ - EOF Disconnect-Terminate-Class 1 (Obsolete)" }, {EOFA_NEG, "EOFa- - EOF Abort" }, {EOFA_POS, "EOFa+ - EOF Abort" }, {EOFNI_NEG, "EOFn- - EOF Normal" }, {EOFNI_POS, "EOFn+ - EOF Normal" }, {EOFDTI_NEG, "EOFni- - EOF Normal Invalid" }, {EOFDTI_POS, "EOFni+ - EOF Normal Invalid" }, {EOFRI_NEG, "EOFdti- - EOF Disconnect-Terminate-Invalid Class 1 (Obsolete)" }, {EOFRI_POS, "EOFdti+ - EOF Disconnect-Terminate-Invalid Class 1 (Obsolete)" }, {EOFRTI_NEG, "EOFrti- - EOF Remove-Terminate Invalid Class 4 (Obsolete)" }, {EOFRTI_POS, "EOFrti+ - EOF Remove-Terminate Invalid Class 4 (Obsolete)" }, {0, NULL} }; /* BA_ACC & BA_RJT are decoded in this file itself instead of a traditional * dedicated file and dissector format because the dissector would require some * fields of the FC_HDR such as param in some cases, type in some others, the * lower 4 bits of r_ctl in some other cases etc. So, we decode BLS & Link Ctl * in this file itself. */ static void dissect_fc_ba_acc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { /* Set up structures needed to add the protocol subtree and manage it */ proto_item *ti; proto_tree *acc_tree; int offset = 0; /* Make entries in Protocol column and Info column on summary display */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS"); col_set_str(pinfo->cinfo, COL_INFO, "BA_ACC"); if (tree) { ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc"); acc_tree = proto_item_add_subtree (ti, ett_fcbls); proto_tree_add_item (acc_tree, hf_fc_bls_seqid_vld, tvb, offset++, 1, ENC_BIG_ENDIAN); proto_tree_add_item (acc_tree, hf_fc_bls_lastvld_seqid, tvb, offset++, 1, ENC_BIG_ENDIAN); offset += 2; /* Skip reserved field */ proto_tree_add_item (acc_tree, hf_fc_bls_oxid, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item (acc_tree, hf_fc_bls_rxid, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item (acc_tree, hf_fc_bls_lowseqcnt, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item (acc_tree, hf_fc_bls_hiseqcnt, tvb, offset, 2, ENC_BIG_ENDIAN); } } static void dissect_fc_ba_rjt (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { /* Set up structures needed to add the protocol subtree and manage it */ proto_item *ti; proto_tree *rjt_tree; int offset = 0; /* Make entries in Protocol column and Info column on summary display */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS"); col_set_str(pinfo->cinfo, COL_INFO, "BA_RJT"); if (tree) { ti = proto_tree_add_text (tree, tvb, 0, tvb_length (tvb), "Basic Link Svc"); rjt_tree = proto_item_add_subtree (ti, ett_fcbls); proto_tree_add_item (rjt_tree, hf_fc_bls_rjtcode, tvb, offset+1, 1, ENC_BIG_ENDIAN); proto_tree_add_item (rjt_tree, hf_fc_bls_rjtdetail, tvb, offset+2, 1, ENC_BIG_ENDIAN); proto_tree_add_item (rjt_tree, hf_fc_bls_vendor, tvb, offset+3, 1, ENC_BIG_ENDIAN); } } static guint8 fc_get_ftype (guint8 r_ctl, guint8 type) { /* A simple attempt to determine the upper level protocol based on the * r_ctl & type fields. */ switch (r_ctl & 0xF0) { case FC_RCTL_DEV_DATA: switch (type) { case FC_TYPE_SWILS: if ((r_ctl == 0x2) || (r_ctl == 0x3)) return FC_FTYPE_SWILS; else return FC_FTYPE_UNDEF; case FC_TYPE_IP: return FC_FTYPE_IP; case FC_TYPE_SCSI: return FC_FTYPE_SCSI; case FC_TYPE_FCCT: return FC_FTYPE_FCCT; case FC_TYPE_SB_FROM_CU: case FC_TYPE_SB_TO_CU: return FC_FTYPE_SBCCS; case FC_TYPE_VENDOR: return FC_FTYPE_OHMS; default: return FC_FTYPE_UNDEF; } case FC_RCTL_ELS: if (((r_ctl & 0x0F) == 0x2) || ((r_ctl & 0x0F) == 0x3)) return FC_FTYPE_ELS; else if (type == FC_TYPE_ELS) return FC_FTYPE_OHMS; else return FC_FTYPE_UNDEF; case FC_RCTL_LINK_DATA: switch (type) { case FC_TYPE_SCSI: return FC_FTYPE_SCSI; default: return FC_FTYPE_LINKDATA; } case FC_RCTL_VIDEO: return FC_FTYPE_VDO; case FC_RCTL_BLS: if (type == 0) return FC_FTYPE_BLS; else return FC_FTYPE_UNDEF; case FC_RCTL_LINK_CTL: return FC_FTYPE_LINKCTL; default: return FC_FTYPE_UNDEF; } } static const value_string abts_ack_vals[] = { {0x000000, "ABTS - Cont"}, {0x000010, "ABTS - Abort"}, {0x000020, "ABTS - Stop"}, {0x000030, "ABTS - Imm Seq Retx"}, {0,NULL} }; static const value_string abts_not_ack_vals[] = { {0x000000, "ABTS - Abort/MS"}, {0x000010, "ABTS - Abort/SS"}, {0x000020, "ABTS - Process/IB"}, {0x000030, "ABTS - Discard/MS/Imm Retx"}, {0,NULL} }; static const value_string last_data_frame_vals[] = { {0x000000, "Last Data Frame - No Info"}, {0x004000, "Last Data Frame - Seq Imm"}, {0x008000, "Last Data Frame - Seq Soon"}, {0x00c000, "Last Data Frame - Seq Delyd"}, {0,NULL} }; static const value_string ack_0_1_vals[] = { {0x003000, "ACK_0 Required"}, {0x002000, "ACK_0 Required"}, {0x001000, "ACK_1 Required"}, {0x000000, "no ack required"}, {0,NULL} }; static const true_false_string tfs_fc_fctl_exchange_responder = { "Exchange Responder", "Exchange Originator" }; static const true_false_string tfs_fc_fctl_seq_recipient = { "Seq Recipient", "Seq Initiator" }; static const true_false_string tfs_fc_fctl_exchange_first = { "Exchg First", "NOT exchg first" }; static const true_false_string tfs_fc_fctl_exchange_last = { "Exchg Last", "NOT exchg last" }; static const true_false_string tfs_fc_fctl_seq_last = { "Seq Last", "NOT seq last" }; static const true_false_string tfs_fc_fctl_priority = { "Priority", "CS_CTL" }; static const true_false_string tfs_fc_fctl_transfer_seq_initiative = { "Transfer Seq Initiative", "NOT transfer seq initiative" }; static const true_false_string tfs_fc_fctl_rexmitted_seq = { "Retransmitted Sequence", "NOT retransmitted sequence" }; static const true_false_string tfs_fc_fctl_rel_offset = { "Rel Offset SET", "rel offset NOT set" }; /* * Dissect the VFT header. */ static void dissect_fc_vft(proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item = NULL; proto_tree *tree = NULL; guint8 rctl; guint8 ver; guint8 type; guint8 pri; guint16 vf_id; guint8 hop_ct; rctl = tvb_get_guint8(tvb, offset); type = tvb_get_guint8(tvb, offset + 1); ver = (type >> 6) & 3; type = (type >> 2) & 0xf; vf_id = tvb_get_ntohs(tvb, offset + 2); pri = (vf_id >> 13) & 7; vf_id = (vf_id >> 1) & 0xfff; hop_ct = tvb_get_guint8(tvb, offset + 4); if (parent_tree) { item = proto_tree_add_uint_format(parent_tree, hf_fc_vft, tvb, offset, 8, vf_id, "VFT Header: " "VF_ID %d Pri %d Hop Count %d", vf_id, pri, hop_ct); tree = proto_item_add_subtree(item, ett_fc_vft); } proto_tree_add_uint(tree, hf_fc_vft_rctl, tvb, offset, 1, rctl); proto_tree_add_uint(tree, hf_fc_vft_ver, tvb, offset + 1, 1, ver); proto_tree_add_uint(tree, hf_fc_vft_type, tvb, offset + 1, 1, type); proto_tree_add_uint(tree, hf_fc_vft_pri, tvb, offset + 2, 1, pri); proto_tree_add_uint(tree, hf_fc_vft_vf_id, tvb, offset + 2, 2, vf_id); proto_tree_add_uint(tree, hf_fc_vft_hop_ct, tvb, offset + 4, 1, hop_ct); } /* code to dissect the F_CTL bitmask */ static void dissect_fc_fctl(packet_info *pinfo _U_, proto_tree *parent_tree, tvbuff_t *tvb, int offset) { proto_item *item=NULL; proto_tree *tree=NULL; guint32 flags; flags = tvb_get_guint8 (tvb, offset); flags = (flags<<8) | tvb_get_guint8 (tvb, offset+1); flags = (flags<<8) | tvb_get_guint8 (tvb, offset+2); if(parent_tree){ item=proto_tree_add_uint(parent_tree, hf_fc_fctl, tvb, offset, 3, flags); tree=proto_item_add_subtree(item, ett_fctl); } proto_tree_add_boolean(tree, hf_fc_fctl_exchange_responder, tvb, offset, 3, flags); if (flags&FC_FCTL_EXCHANGE_RESPONDER){ proto_item_append_text(item, " Exchange Responder"); if (flags & (~( FC_FCTL_EXCHANGE_RESPONDER ))) proto_item_append_text(item, ","); } else { proto_item_append_text(item, " Exchange Originator"); if (flags & (~( FC_FCTL_EXCHANGE_RESPONDER ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_EXCHANGE_RESPONDER )); proto_tree_add_boolean(tree, hf_fc_fctl_seq_recipient, tvb, offset, 3, flags); if (flags&FC_FCTL_SEQ_RECIPIENT){ proto_item_append_text(item, " Seq Recipient"); if (flags & (~( FC_FCTL_SEQ_RECIPIENT ))) proto_item_append_text(item, ","); } else { proto_item_append_text(item, " Seq Initiator"); if (flags & (~( FC_FCTL_SEQ_RECIPIENT ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_SEQ_RECIPIENT )); proto_tree_add_boolean(tree, hf_fc_fctl_exchange_first, tvb, offset, 3, flags); if (flags&FC_FCTL_EXCHANGE_FIRST){ proto_item_append_text(item, " Exchg First"); if (flags & (~( FC_FCTL_EXCHANGE_FIRST ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_EXCHANGE_FIRST )); proto_tree_add_boolean(tree, hf_fc_fctl_exchange_last, tvb, offset, 3, flags); if (flags&FC_FCTL_EXCHANGE_LAST){ proto_item_append_text(item, " Exchg Last"); if (flags & (~( FC_FCTL_EXCHANGE_LAST ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_EXCHANGE_LAST )); proto_tree_add_boolean(tree, hf_fc_fctl_seq_last, tvb, offset, 3, flags); if (flags&FC_FCTL_SEQ_LAST){ proto_item_append_text(item, " Seq Last"); if (flags & (~( FC_FCTL_SEQ_LAST ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_SEQ_LAST )); proto_tree_add_boolean(tree, hf_fc_fctl_priority, tvb, offset, 3, flags); if (flags&FC_FCTL_PRIORITY){ proto_item_append_text(item, " Priority"); if (flags & (~( FC_FCTL_PRIORITY ))) proto_item_append_text(item, ","); } else { proto_item_append_text(item, " CS_CTL"); if (flags & (~( FC_FCTL_PRIORITY ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_PRIORITY )); proto_tree_add_boolean(tree, hf_fc_fctl_transfer_seq_initiative, tvb, offset, 3, flags); if (flags&FC_FCTL_TRANSFER_SEQ_INITIATIVE){ proto_item_append_text(item, " Transfer Seq Initiative"); if (flags & (~( FC_FCTL_TRANSFER_SEQ_INITIATIVE ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_TRANSFER_SEQ_INITIATIVE )); proto_tree_add_uint(tree, hf_fc_fctl_last_data_frame, tvb, offset, 3, flags); proto_tree_add_uint(tree, hf_fc_fctl_ack_0_1, tvb, offset, 3, flags); proto_tree_add_boolean(tree, hf_fc_fctl_rexmitted_seq, tvb, offset, 3, flags); if (flags&FC_FCTL_REXMITTED_SEQ){ proto_item_append_text(item, " Rexmitted Seq"); if (flags & (~( FC_FCTL_REXMITTED_SEQ ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_REXMITTED_SEQ )); proto_tree_add_uint(tree, hf_fc_fctl_abts_ack, tvb, offset, 3, flags); proto_tree_add_boolean(tree, hf_fc_fctl_rel_offset, tvb, offset, 3, flags); if (flags&FC_FCTL_REL_OFFSET){ proto_item_append_text(item, " Rel Offset"); if (flags & (~( FC_FCTL_REL_OFFSET ))) proto_item_append_text(item, ","); } flags&=(~( FC_FCTL_REL_OFFSET )); } static const value_string fc_bls_proto_val[] = { {FC_BLS_NOP , "NOP"}, {FC_BLS_ABTS , "ABTS"}, {FC_BLS_RMC , "RMC"}, {FC_BLS_BAACC , "BA_ACC"}, {FC_BLS_BARJT , "BA_RJT"}, {FC_BLS_PRMT , "PRMT"}, {0, NULL} }; static const value_string fc_els_proto_val[] = { {0x01 , "Solicited Data"}, {0x02 , "Request"}, {0x03 , "Reply"}, {0, NULL} }; /* Code to actually dissect the packets */ static void dissect_fc_helper (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean is_ifcp) { /* Set up structures needed to add the protocol subtree and manage it */ proto_item *ti=NULL, *hidden_item; proto_tree *fc_tree = NULL; tvbuff_t *next_tvb; int offset = 0, next_offset; int vft_offset = -1; gboolean is_lastframe_inseq, is_1frame_inseq/*, is_valid_frame*/; gboolean is_exchg_resp = 0; fragment_data *fcfrag_head; guint32 frag_id; guint32 frag_size; guint8 df_ctl, seq_id; guint32 f_ctl; guint32 param; guint16 real_seqcnt; guint8 ftype; /*gboolean is_ack;*/ static fc_hdr fchdr; itlq_nexus_t *fc_ex=NULL; fc_conv_data_t *fc_conv_data=NULL; conversation_t *conversation; fcseq_conv_data_t *cdata; fcseq_conv_key_t ckey, *req_key; fchdr.itlq=NULL; /* Make entries in Protocol column and Info column on summary display */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC"); fchdr.r_ctl = tvb_get_guint8 (tvb, offset); /* * If the frame contains a VFT (virtual fabric tag), decode it * as a separate header before the FC frame header. * * This used to be called the Cisco-proprietary EISL field, but is now * standardized in FC-FS-2. See section 10.2.4. */ if (fchdr.r_ctl == FC_RCTL_VFT) { pinfo->vsan = (tvb_get_ntohs(tvb, offset + 2) >> 1) & 0xfff; vft_offset = offset; offset += 8; fchdr.r_ctl = tvb_get_guint8 (tvb, offset); } /* Each fc endpoint pair gets its own TCP session in iFCP but * the src/dst ids are undefined(==semi-random) in the FC header. * This means we can no track conversations for FC over iFCP by using * the FC src/dst addresses. * For iFCP: Do not update the pinfo src/dst struct and let it remain * being tcpip src/dst so that request/response matching in the FCP layer * will use ip addresses instead and still work. */ if(!is_ifcp){ SET_ADDRESS (&pinfo->dst, AT_FC, 3, tvb_get_ptr(tvb,offset+1,3)); SET_ADDRESS (&pinfo->src, AT_FC, 3, tvb_get_ptr(tvb,offset+5,3)); pinfo->srcport=0; pinfo->destport=0; } SET_ADDRESS(&fchdr.d_id, pinfo->dst.type, pinfo->dst.len, pinfo->dst.data); SET_ADDRESS(&fchdr.s_id, pinfo->src.type, pinfo->src.len, pinfo->src.data); fchdr.cs_ctl = tvb_get_guint8 (tvb, offset+4); fchdr.type = tvb_get_guint8 (tvb, offset+8); fchdr.fctl=tvb_get_ntoh24(tvb,offset+9); fchdr.seqcnt = tvb_get_ntohs (tvb, offset+14); fchdr.oxid=tvb_get_ntohs(tvb,offset+16); fchdr.rxid=tvb_get_ntohs(tvb,offset+18); fchdr.relative_offset=0; param = tvb_get_ntohl (tvb, offset+20); seq_id = tvb_get_guint8 (tvb, offset+12); pinfo->oxid = fchdr.oxid; pinfo->rxid = fchdr.rxid; pinfo->ptype = PT_EXCHG; pinfo->r_ctl = fchdr.r_ctl; /* set up a conversation and conversation data */ /* TODO treat the fc address s_id==00.00.00 as a wildcard matching anything */ conversation=find_or_create_conversation(pinfo); fchdr.conversation=conversation; fc_conv_data=conversation_get_proto_data(conversation, proto_fc); if(!fc_conv_data){ fc_conv_data=se_alloc(sizeof(fc_conv_data_t)); fc_conv_data->exchanges=se_tree_create_non_persistent(EMEM_TREE_TYPE_RED_BLACK, "FC Exchanges"); conversation_add_proto_data(conversation, proto_fc, fc_conv_data); } /* set up the exchange data */ /* XXX we should come up with a way to handle when the 16bit oxid wraps * so that large traces will work */ fc_ex=(itlq_nexus_t *)se_tree_lookup32(fc_conv_data->exchanges, fchdr.oxid); if(!fc_ex){ fc_ex=se_alloc(sizeof(itlq_nexus_t)); fc_ex->first_exchange_frame=0; fc_ex->last_exchange_frame=0; fc_ex->lun=0xffff; fc_ex->scsi_opcode=0xffff; fc_ex->task_flags=0; fc_ex->data_length=0; fc_ex->bidir_data_length=0; fc_ex->fc_time=pinfo->fd->abs_ts; fc_ex->flags=0; fc_ex->alloc_len=0; fc_ex->extra_data=NULL; se_tree_insert32(fc_conv_data->exchanges, fchdr.oxid, fc_ex); } /* populate the exchange struct */ if(!pinfo->fd->flags.visited){ if(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST){ fc_ex->first_exchange_frame=pinfo->fd->num; fc_ex->fc_time = pinfo->fd->abs_ts; } if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){ fc_ex->last_exchange_frame=pinfo->fd->num; } } /* In the interest of speed, if "tree" is NULL, don't do any work not necessary to generate protocol tree items. */ if (tree) { ti = proto_tree_add_protocol_format (tree, proto_fc, tvb, offset, FC_HEADER_SIZE, "Fibre Channel"); fc_tree = proto_item_add_subtree (ti, ett_fc); } /* put some nice exchange data in the tree */ if(!(fchdr.fctl&FC_FCTL_EXCHANGE_FIRST)){ proto_item *it; it=proto_tree_add_uint(fc_tree, hf_fc_exchange_first_frame, tvb, 0, 0, fc_ex->first_exchange_frame); PROTO_ITEM_SET_GENERATED(it); if(fchdr.fctl&FC_FCTL_EXCHANGE_LAST){ nstime_t delta_ts; nstime_delta(&delta_ts, &pinfo->fd->abs_ts, &fc_ex->fc_time); it=proto_tree_add_time(ti, hf_fc_time, tvb, 0, 0, &delta_ts); PROTO_ITEM_SET_GENERATED(it); } } if(!(fchdr.fctl&FC_FCTL_EXCHANGE_LAST)){ proto_item *it; it=proto_tree_add_uint(fc_tree, hf_fc_exchange_last_frame, tvb, 0, 0, fc_ex->last_exchange_frame); PROTO_ITEM_SET_GENERATED(it); } fchdr.itlq=fc_ex; /*is_ack = ((fchdr.r_ctl == 0xC0) || (fchdr.r_ctl == 0xC1));*/ /* There are two ways to determine if this is the first frame of a * sequence. Either: * (i) The SOF bits indicate that this is the first frame OR * (ii) This is an SOFf frame and seqcnt is 0. */ is_1frame_inseq = (((pinfo->sof_eof & PINFO_SOF_FIRST_FRAME) == PINFO_SOF_FIRST_FRAME) || (((pinfo->sof_eof & PINFO_SOF_SOFF) == PINFO_SOF_SOFF) && (fchdr.seqcnt == 0))); is_lastframe_inseq = ((pinfo->sof_eof & PINFO_EOF_LAST_FRAME) == PINFO_EOF_LAST_FRAME); is_lastframe_inseq |= fchdr.fctl & FC_FCTL_SEQ_LAST; /*is_valid_frame = ((pinfo->sof_eof & 0x40) == 0x40);*/ ftype = fc_get_ftype (fchdr.r_ctl, fchdr.type); if (check_col (pinfo->cinfo, COL_INFO)) { col_add_str (pinfo->cinfo, COL_INFO, val_to_str (ftype, fc_ftype_vals, "Unknown Type (0x%x)")); if (ftype == FC_FTYPE_LINKCTL) col_append_fstr (pinfo->cinfo, COL_INFO, ", %s", val_to_str ((fchdr.r_ctl & 0x0F), fc_lctl_proto_val, "LCTL 0x%x")); } if (vft_offset >= 0) { dissect_fc_vft(fc_tree, tvb, vft_offset); } switch (fchdr.r_ctl & 0xF0) { case FC_RCTL_DEV_DATA: case FC_RCTL_LINK_DATA: case FC_RCTL_VIDEO: /* the lower 4 bits of R_CTL are the information category */ proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/%s)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), val_to_str ((fchdr.r_ctl & 0x0F), fc_iu_val, "0x%x")); break; case FC_RCTL_LINK_CTL: /* the lower 4 bits of R_CTL indicate the type of link ctl frame */ proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/%s)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), val_to_str ((fchdr.r_ctl & 0x0F), fc_lctl_proto_val, "0x%x")); break; case FC_RCTL_BLS: switch (fchdr.type) { case 0x00: /* the lower 4 bits of R_CTL indicate the type of BLS frame */ proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/%s)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), val_to_str ((fchdr.r_ctl & 0x0F), fc_bls_proto_val, "0x%x")); break; default: proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/0x%x)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), fchdr.r_ctl & 0x0F); break; } break; case FC_RCTL_ELS: switch (fchdr.type) { case 0x01: /* the lower 4 bits of R_CTL indicate the type of ELS frame */ proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/%s)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), val_to_str ((fchdr.r_ctl & 0x0F), fc_els_proto_val, "0x%x")); break; default: proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/0x%x)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), fchdr.r_ctl & 0x0F); break; } break; default: proto_tree_add_uint_format (fc_tree, hf_fc_rctl, tvb, offset, FC_RCTL_SIZE, fchdr.r_ctl, "R_CTL: 0x%x(%s/0x%x)", fchdr.r_ctl, val_to_str ((fchdr.r_ctl & 0xF0), fc_routing_val, "0x%x"), fchdr.r_ctl & 0x0F); break; } hidden_item = proto_tree_add_uint (fc_tree, hf_fc_ftype, tvb, offset, 1, ftype); PROTO_ITEM_SET_HIDDEN(hidden_item); /* XXX - use "fc_wka_vals[]" on this? */ proto_tree_add_string (fc_tree, hf_fc_did, tvb, offset+1, 3, fc_to_str (fchdr.d_id.data)); hidden_item = proto_tree_add_string (fc_tree, hf_fc_id, tvb, offset+1, 3, fc_to_str (fchdr.d_id.data)); PROTO_ITEM_SET_HIDDEN(hidden_item); proto_tree_add_uint (fc_tree, hf_fc_csctl, tvb, offset+4, 1, fchdr.cs_ctl); /* XXX - use "fc_wka_vals[]" on this? */ proto_tree_add_string (fc_tree, hf_fc_sid, tvb, offset+5, 3, fc_to_str (fchdr.s_id.data)); hidden_item = proto_tree_add_string (fc_tree, hf_fc_id, tvb, offset+5, 3, fc_to_str (fchdr.s_id.data)); PROTO_ITEM_SET_HIDDEN(hidden_item); if (ftype == FC_FTYPE_LINKCTL) { if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYB) || ((fchdr.r_ctl & 0x0F) == FC_LCTL_FBSYL)) { /* for F_BSY frames, the upper 4 bits of the type field specify the * reason for the BSY. */ proto_tree_add_uint_format (fc_tree, hf_fc_type, tvb, offset+8, FC_TYPE_SIZE, fchdr.type,"Type: 0x%x(%s)", fchdr.type, fclctl_get_typestr ((guint8) (fchdr.r_ctl & 0x0F), fchdr.type)); } else { proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, ENC_BIG_ENDIAN); } } else { proto_tree_add_item (fc_tree, hf_fc_type, tvb, offset+8, 1, ENC_BIG_ENDIAN); } dissect_fc_fctl(pinfo, fc_tree, tvb, offset+9); f_ctl = tvb_get_ntoh24(tvb, offset+9); proto_tree_add_item (fc_tree, hf_fc_seqid, tvb, offset+12, 1, ENC_BIG_ENDIAN); df_ctl = tvb_get_guint8(tvb, offset+13); proto_tree_add_uint (fc_tree, hf_fc_dfctl, tvb, offset+13, 1, df_ctl); proto_tree_add_uint (fc_tree, hf_fc_seqcnt, tvb, offset+14, 2, fchdr.seqcnt); proto_tree_add_uint (fc_tree, hf_fc_oxid, tvb, offset+16, 2, fchdr.oxid); proto_tree_add_uint (fc_tree, hf_fc_rxid, tvb, offset+18, 2, fchdr.rxid); if (ftype == FC_FTYPE_LINKCTL) { if (((fchdr.r_ctl & 0x0F) == FC_LCTL_FRJT) || ((fchdr.r_ctl & 0x0F) == FC_LCTL_PRJT) || ((fchdr.r_ctl & 0x0F) == FC_LCTL_PBSY)) { /* In all these cases of Link Ctl frame, the parameter field * encodes the detailed error message */ proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb, offset+20, 4, param, "Parameter: 0x%x(%s)", param, fclctl_get_paramstr ((fchdr.r_ctl & 0x0F), param)); } else { proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, ENC_BIG_ENDIAN); } } else if (ftype == FC_FTYPE_BLS) { if ((fchdr.r_ctl & 0x0F) == FC_BLS_ABTS) { proto_tree_add_uint_format (fc_tree, hf_fc_param, tvb, offset+20, 4, param, "Parameter: 0x%x(%s)", param, ((param & 0x0F) == 1 ? "Abort Sequence" : "Abort Exchange")); } else { proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, ENC_BIG_ENDIAN); } } else if (ftype == FC_FTYPE_SCSI ) { if (f_ctl&FC_FCTL_REL_OFFSET){ proto_tree_add_item (fc_tree, hf_fc_relative_offset, tvb, offset+20, 4, ENC_BIG_ENDIAN); fchdr.relative_offset=tvb_get_ntohl(tvb, offset+20); } else { proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, ENC_BIG_ENDIAN); } } else { proto_tree_add_item (fc_tree, hf_fc_param, tvb, offset+20, 4, ENC_BIG_ENDIAN); } /* Skip the Frame_Header */ next_offset = offset + FC_HEADER_SIZE; /* Network_Header present? */ if (df_ctl & FC_DFCTL_NH) { /* Yes - dissect it. */ if (tree) { proto_tree_add_string (fc_tree, hf_fc_nh_da, tvb, next_offset, 8, fcwwn_to_str (tvb_get_ephemeral_string (tvb, offset, 8))); proto_tree_add_string (fc_tree, hf_fc_nh_sa, tvb, offset+8, 8, fcwwn_to_str (tvb_get_ephemeral_string (tvb, offset+8, 8))); } next_offset += 16; } /* XXX - handle Association_Header and Device_Header here */ if (ftype == FC_FTYPE_LINKCTL) { /* ACK_1 frames and other LINK_CTL frames echo the last seq bit if the * packet they're ack'ing did not have it set. So, we'll incorrectly * flag them as being fragmented when they're not. This fixes the * problem */ is_lastframe_inseq = TRUE; } else { is_exchg_resp = (f_ctl & FC_FCTL_EXCHANGE_RESPONDER) != 0; } if (tvb_reported_length (tvb) < FC_HEADER_SIZE) THROW(ReportedBoundsError); frag_size = tvb_reported_length (tvb)-FC_HEADER_SIZE; /* If there is an MDS header, we need to subtract the MDS trailer size * Link Ctl, BLS & OHMS are all (encap header + FC Header + encap trailer) * and are never fragmented and so we ignore the frag_size assertion for * these frames. */ if ((pinfo->ethertype == ETHERTYPE_UNK) || (pinfo->ethertype == ETHERTYPE_FCFT)) { if ((frag_size < MDSHDR_TRAILER_SIZE) || ((frag_size == MDSHDR_TRAILER_SIZE) && (ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS) && (ftype != FC_FTYPE_OHMS))) THROW(ReportedBoundsError); frag_size -= MDSHDR_TRAILER_SIZE; } else if (pinfo->ethertype == ETHERTYPE_BRDWALK) { if ((frag_size <= 8) || ((frag_size == MDSHDR_TRAILER_SIZE) && (ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS) && (ftype != FC_FTYPE_OHMS))) THROW(ReportedBoundsError); frag_size -= 8; /* 4 byte of FC CRC + 4 bytes of error+EOF = 8 bytes */ } if (!is_lastframe_inseq) { /* Show this only as a fragmented FC frame */ col_append_str (pinfo->cinfo, COL_INFO, " (Fragmented)"); } /* If this is a fragment, attempt to check if fully reassembled frame is * present, if we're configured to reassemble. */ if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS) && (ftype != FC_FTYPE_OHMS) && (!is_lastframe_inseq || !is_1frame_inseq) && fc_reassemble && tvb_bytes_exist(tvb, FC_HEADER_SIZE, frag_size) && tree) { /* Add this to the list of fragments */ /* In certain cases such as FICON, the SEQ_CNT is streaming * i.e. continuously increasing. So, zero does not signify the * first frame of the sequence. To fix this, we need to save the * SEQ_CNT of the first frame in sequence and use this value to * determine the actual offset into a frame. */ ckey.conv_idx = conversation->index; cdata = (fcseq_conv_data_t *)g_hash_table_lookup (fcseq_req_hash, &ckey); if (is_1frame_inseq) { if (cdata) { /* Since we never free the memory used by an exchange, this maybe a * case of another request using the same exchange as a previous * req. */ cdata->seq_cnt = fchdr.seqcnt; } else { req_key = se_alloc (sizeof(fcseq_conv_key_t)); req_key->conv_idx = conversation->index; cdata = se_alloc (sizeof(fcseq_conv_data_t)); cdata->seq_cnt = fchdr.seqcnt; g_hash_table_insert (fcseq_req_hash, req_key, cdata); } real_seqcnt = 0; } else if (cdata != NULL) { real_seqcnt = fchdr.seqcnt - cdata->seq_cnt ; } else { real_seqcnt = fchdr.seqcnt; } /* Verify that this is a valid fragment */ if (is_lastframe_inseq && !is_1frame_inseq && !real_seqcnt) { /* This is a frame that purports to be the last frame in a * sequence, is not the first frame, but has a seqcnt that is * 0. This is a bogus frame, don't attempt to reassemble it. */ next_tvb = tvb_new_subset_remaining (tvb, next_offset); col_append_str (pinfo->cinfo, COL_INFO, " (Bogus Fragment)"); } else { frag_id = ((pinfo->oxid << 16) ^ seq_id) | is_exchg_resp ; /* We assume that all frames are of the same max size */ fcfrag_head = fragment_add (tvb, FC_HEADER_SIZE, pinfo, frag_id, fc_fragment_table, real_seqcnt * fc_max_frame_size, frag_size, !is_lastframe_inseq); if (fcfrag_head) { next_tvb = tvb_new_child_real_data(tvb, fcfrag_head->data, fcfrag_head->datalen, fcfrag_head->datalen); /* Add the defragmented data to the data source list. */ add_new_data_source(pinfo, next_tvb, "Reassembled FC"); if (tree) { hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled, tvb, offset+9, 1, 1); PROTO_ITEM_SET_HIDDEN(hidden_item); } } else { if (tree) { hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled, tvb, offset+9, 1, 0); PROTO_ITEM_SET_HIDDEN(hidden_item); } next_tvb = tvb_new_subset_remaining (tvb, next_offset); call_dissector (data_handle, next_tvb, pinfo, tree); return; } } } else { if (tree) { hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled, tvb, offset+9, 1, 0); PROTO_ITEM_SET_HIDDEN(hidden_item); } next_tvb = tvb_new_subset_remaining (tvb, next_offset); } if ((ftype != FC_FTYPE_LINKCTL) && (ftype != FC_FTYPE_BLS)) { /* If relative offset is used, only dissect the pdu with * offset 0 (param) */ if( (fchdr.fctl&FC_FCTL_REL_OFFSET) && param ){ call_dissector (data_handle, next_tvb, pinfo, tree); } else { void *saved_private_data; saved_private_data = pinfo->private_data; pinfo->private_data = &fchdr; if (!dissector_try_uint (fcftype_dissector_table, ftype, next_tvb, pinfo, tree)) { call_dissector (data_handle, next_tvb, pinfo, tree); } pinfo->private_data = saved_private_data; } } else if (ftype == FC_FTYPE_BLS) { if ((fchdr.r_ctl & 0x0F) == FC_BLS_BAACC) { dissect_fc_ba_acc (next_tvb, pinfo, tree); } else if ((fchdr.r_ctl & 0x0F) == FC_BLS_BARJT) { dissect_fc_ba_rjt (next_tvb, pinfo, tree); } else if ((fchdr.r_ctl & 0x0F) == FC_BLS_ABTS) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "BLS"); col_set_str(pinfo->cinfo, COL_INFO, "ABTS"); } } tap_queue_packet(fc_tap, pinfo, &fchdr); } static void dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { dissect_fc_helper (tvb, pinfo, tree, FALSE); } static void dissect_fc_ifcp (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { dissect_fc_helper (tvb, pinfo, tree, TRUE); } static void dissect_fcsof(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *it = NULL; proto_tree *fcsof_tree = NULL; gint bytes_remaining; tvbuff_t *next_tvb, *checksum_tvb; guint32 sof = 0; guint32 crc = 0; guint32 crc_computed = 0; guint32 eof = 0; gint crc_offset = 0; gint eof_offset = 0; gint sof_offset = 0; const gint FCSOF_TRAILER_LEN = 8; const gint FCSOF_HEADER_LEN = 4; gint frame_len_for_checksum = 0; col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC"); crc_offset = tvb_reported_length(tvb) - FCSOF_TRAILER_LEN; eof_offset = crc_offset + 4; sof_offset = 0; /* Get SOF */ sof = tvb_get_ntohl(tvb, 0); /* GET CRC */ crc = tvb_get_ntohl(tvb, crc_offset); /* GET Computed CRC */ frame_len_for_checksum = crc_offset - FCSOF_HEADER_LEN; checksum_tvb = tvb_new_subset(tvb, 4, frame_len_for_checksum, frame_len_for_checksum); crc_computed = crc32_802_tvb(checksum_tvb, frame_len_for_checksum); /* Get EOF */ eof = tvb_get_ntohl(tvb, eof_offset); it = proto_tree_add_protocol_format(tree, proto_fcsof, tvb, 0, 4, "Fibre Channel Delimiter: SOF: %s EOF: %s", val_to_str(sof, fc_sof_vals, "0x%x"), val_to_str(eof, fc_eof_vals, "0x%x")); fcsof_tree = proto_item_add_subtree(it, ett_fcsof); proto_tree_add_uint(fcsof_tree, hf_fcsof, tvb, sof_offset, 4, sof); if (crc == crc_computed) { proto_tree_add_uint_format(fcsof_tree, hf_fccrc, tvb, crc_offset, 4, crc, "CRC: %8.8x [valid]", crc); } else { it = proto_tree_add_uint_format(fcsof_tree, hf_fccrc, tvb, crc_offset, 4, crc, "CRC: %8.8x " "[error: should be %8.8x]", crc, crc_computed); expert_add_info_format(pinfo, it, PI_CHECKSUM, PI_ERROR, "Bad FC CRC %8.8x %8.x", crc, crc_computed); } proto_tree_add_uint(fcsof_tree, hf_fceof, tvb, eof_offset, 4, eof); bytes_remaining = tvb_length_remaining(tvb, 4); next_tvb = tvb_new_subset(tvb, 4, bytes_remaining, -1); pinfo->sof_eof = 0; if (sof == FC_SOFI2 || sof == FC_SOFI3) { pinfo->sof_eof = PINFO_SOF_FIRST_FRAME; } else if (sof == FC_SOFF) { pinfo->sof_eof = PINFO_SOF_SOFF; } if (eof == EOFT_POS || eof == EOFT_NEG) { pinfo->sof_eof |= PINFO_EOF_LAST_FRAME; } else if (eof == EOFDTI_NEG || eof == EOFDTI_POS) { pinfo->sof_eof |= PINFO_EOF_INVALID; } /* Call FC dissector */ call_dissector(fc_handle, next_tvb, pinfo, tree); } /* Register the protocol with Wireshark */ /* this format is require because a script is used to build the C function that calls all the protocol registration. */ void proto_register_fc(void) { /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { { &hf_fc_rctl, { "R_CTL", "fc.r_ctl", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_fc_ftype, {"Frame type", "fc.ftype", FT_UINT8, BASE_HEX, VALS(fc_ftype_vals), 0x0, "Derived Type", HFILL}}, { &hf_fc_did, { "Dest Addr", "fc.d_id", FT_STRING, BASE_NONE, NULL, 0x0, "Destination Address", HFILL}}, { &hf_fc_csctl, {"CS_CTL", "fc.cs_ctl", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_sid, {"Src Addr", "fc.s_id", FT_STRING, BASE_NONE, NULL, 0x0, "Source Address", HFILL}}, { &hf_fc_id, {"Addr", "fc.id", FT_STRING, BASE_NONE, NULL, 0x0, "Source or Destination Address", HFILL}}, { &hf_fc_type, {"Type", "fc.type", FT_UINT8, BASE_HEX, VALS (fc_fc4_val), 0x0, NULL, HFILL}}, { &hf_fc_fctl, {"F_CTL", "fc.f_ctl", FT_UINT24, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_seqid, {"SEQ_ID", "fc.seq_id", FT_UINT8, BASE_HEX, NULL, 0x0, "Sequence ID", HFILL}}, { &hf_fc_dfctl, {"DF_CTL", "fc.df_ctl", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_seqcnt, {"SEQ_CNT", "fc.seq_cnt", FT_UINT16, BASE_DEC, NULL, 0x0, "Sequence Count", HFILL}}, { &hf_fc_oxid, {"OX_ID", "fc.ox_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Originator ID", HFILL}}, { &hf_fc_rxid, {"RX_ID", "fc.rx_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Receiver ID", HFILL}}, { &hf_fc_param, {"Parameter", "fc.parameter", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_reassembled, {"Reassembled Frame", "fc.reassembled", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL}}, { &hf_fc_nh_da, {"Network DA", "fc.nethdr.da", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL}}, { &hf_fc_nh_sa, {"Network SA", "fc.nethdr.sa", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL}}, /* Basic Link Svc field definitions */ { &hf_fc_bls_seqid_vld, {"SEQID Valid", "fc.bls_seqidvld", FT_UINT8, BASE_HEX, VALS (fc_bls_seqid_val), 0x0, NULL, HFILL}}, { &hf_fc_bls_lastvld_seqid, {"Last Valid SEQID", "fc.bls_lastseqid", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_bls_oxid, {"OXID", "fc.bls_oxid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_bls_rxid, {"RXID", "fc.bls_rxid", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_bls_lowseqcnt, {"Low SEQCNT", "fc.bls_lseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_bls_hiseqcnt, {"High SEQCNT", "fc.bls_hseqcnt", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_bls_rjtcode, {"Reason", "fc.bls_reason", FT_UINT8, BASE_HEX, VALS(fc_bls_barjt_val), 0x0, NULL, HFILL}}, { &hf_fc_bls_rjtdetail, {"Reason Explanation", "fc.bls_rjtdetail", FT_UINT8, BASE_HEX, VALS (fc_bls_barjt_det_val), 0x0, NULL, HFILL}}, { &hf_fc_bls_vendor, {"Vendor Unique Reason", "fc.bls_vnduniq", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL}}, { &hf_fc_fctl_exchange_responder, {"ExgRpd", "fc.fctl.exchange_responder", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_responder), FC_FCTL_EXCHANGE_RESPONDER, "Exchange Responder?", HFILL}}, { &hf_fc_fctl_seq_recipient, {"SeqRec", "fc.fctl.seq_recipient", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_recipient), FC_FCTL_SEQ_RECIPIENT, "Seq Recipient?", HFILL}}, { &hf_fc_fctl_exchange_first, {"ExgFst", "fc.fctl.exchange_first", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_first), FC_FCTL_EXCHANGE_FIRST, "First Exchange?", HFILL}}, { &hf_fc_fctl_exchange_last, {"ExgLst", "fc.fctl.exchange_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_exchange_last), FC_FCTL_EXCHANGE_LAST, "Last Exchange?", HFILL}}, { &hf_fc_fctl_seq_last, {"SeqLst", "fc.fctl.seq_last", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_seq_last), FC_FCTL_SEQ_LAST, "Last Sequence?", HFILL}}, { &hf_fc_fctl_priority, {"Pri", "fc.fctl.priority", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_priority), FC_FCTL_PRIORITY, "Priority", HFILL}}, { &hf_fc_fctl_transfer_seq_initiative, {"TSI", "fc.fctl.transfer_seq_initiative", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_transfer_seq_initiative), FC_FCTL_TRANSFER_SEQ_INITIATIVE, "Transfer Seq Initiative", HFILL}}, { &hf_fc_fctl_rexmitted_seq, {"RetSeq", "fc.fctl.rexmitted_seq", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rexmitted_seq), FC_FCTL_REXMITTED_SEQ, "Retransmitted Sequence", HFILL}}, { &hf_fc_fctl_rel_offset, {"RelOff", "fc.fctl.rel_offset", FT_BOOLEAN, 24, TFS(&tfs_fc_fctl_rel_offset), FC_FCTL_REL_OFFSET, "rel offset", HFILL}}, { &hf_fc_fctl_last_data_frame, {"LDF", "fc.fctl.last_data_frame", FT_UINT24, BASE_HEX, VALS(last_data_frame_vals), FC_FCTL_LAST_DATA_FRAME_MASK, "Last Data Frame?", HFILL}}, { &hf_fc_fctl_ack_0_1, {"A01", "fc.fctl.ack_0_1", FT_UINT24, BASE_HEX, VALS(ack_0_1_vals), FC_FCTL_ACK_0_1_MASK, "Ack 0/1 value", HFILL}}, { &hf_fc_fctl_abts_ack, {"AA", "fc.fctl.abts_ack", FT_UINT24, BASE_HEX, VALS(abts_ack_vals), FC_FCTL_ABTS_MASK, "ABTS ACK values", HFILL}}, { &hf_fc_fctl_abts_not_ack, {"AnA", "fc.fctl.abts_not_ack", FT_UINT24, BASE_HEX, VALS(abts_not_ack_vals), FC_FCTL_ABTS_MASK, "ABTS not ACK vals", HFILL}}, { &hf_fc_exchange_first_frame, { "Exchange First In", "fc.exchange_first_frame", FT_FRAMENUM, BASE_NONE, NULL, 0, "The first frame of this exchange is in this frame", HFILL }}, { &hf_fc_exchange_last_frame, { "Exchange Last In", "fc.exchange_last_frame", FT_FRAMENUM, BASE_NONE, NULL, 0, "The last frame of this exchange is in this frame", HFILL }}, { &hf_fc_time, { "Time from Exchange First", "fc.time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, "Time since the first frame of the Exchange", HFILL }}, { &hf_fc_relative_offset, {"Relative Offset", "fc.relative_offset", FT_UINT32, BASE_DEC, NULL, 0, "Relative offset of data", HFILL}}, { &hf_fc_vft, {"VFT Header", "fc.vft", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL}}, { &hf_fc_vft_rctl, {"R_CTL", "fc.vft.rctl", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL}}, { &hf_fc_vft_ver, {"Version", "fc.vft.ver", FT_UINT8, BASE_DEC, NULL, 0, "Version of VFT header", HFILL}}, { &hf_fc_vft_type, {"Type", "fc.vft.type", FT_UINT8, BASE_DEC, NULL, 0, "Type of tagged frame", HFILL}}, { &hf_fc_vft_pri, {"Priority", "fc.vft.type", FT_UINT8, BASE_DEC, NULL, 0, "QoS Priority", HFILL}}, { &hf_fc_vft_vf_id, {"VF_ID", "fc.vft.vf_id", FT_UINT16, BASE_DEC, NULL, 0, "Virtual Fabric ID", HFILL}}, { &hf_fc_vft_hop_ct, {"HopCT", "fc.vft.hop_ct", FT_UINT8, BASE_DEC, NULL, 0, "Hop Count", HFILL}}, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_fc, &ett_fcbls, &ett_fc_vft, &ett_fctl }; module_t *fc_module; /* FC SOF */ static hf_register_info sof_hf[] = { { &hf_fcsof, { "SOF", "fc.sof", FT_UINT32, BASE_HEX, VALS(fc_sof_vals), 0, NULL, HFILL }}, { &hf_fceof, { "EOF", "fc.eof", FT_UINT32, BASE_HEX, VALS(fc_eof_vals), 0, NULL, HFILL }}, { &hf_fccrc, { "CRC", "fc.crc", FT_UINT32, BASE_HEX, NULL, 0, NULL, HFILL }}, }; static gint *sof_ett[] = { &ett_fcsof, &ett_fceof, &ett_fccrc }; /* Register the protocol name and description */ proto_fc = proto_register_protocol ("Fibre Channel", "FC", "fc"); register_dissector ("fc", dissect_fc, proto_fc); register_dissector ("fc_ifcp", dissect_fc_ifcp, proto_fc); fc_tap = register_tap("fc"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_fc, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); /* subdissectors called through this table will find the fchdr structure * through pinfo->private_data */ fcftype_dissector_table = register_dissector_table ("fc.ftype", "FC Frame Type", FT_UINT8, BASE_HEX); /* Register preferences */ fc_module = prefs_register_protocol (proto_fc, NULL); prefs_register_bool_preference (fc_module, "reassemble", "Reassemble multi-frame sequences", "If enabled, reassembly of multi-frame " "sequences is done", &fc_reassemble); prefs_register_uint_preference (fc_module, "max_frame_size", "Max FC Frame Size", "This is the size of non-last frames in a " "multi-frame sequence", 10, &fc_max_frame_size); register_init_routine (fc_exchange_init_protocol); /* Register FC SOF/EOF */ proto_fcsof = proto_register_protocol("Fibre Channel Delimiters", "FCSoF", "fcsof"); proto_register_field_array(proto_fcsof, sof_hf, array_length(sof_hf)); proto_register_subtree_array(sof_ett, array_length(sof_ett)); register_dissector("fcsof", dissect_fcsof, proto_fcsof); } /* If this dissector uses sub-dissector registration add a registration routine. This format is required because a script is used to find these routines and create the code that calls these routines. */ void proto_reg_handoff_fc (void) { dissector_handle_t fcsof_handle; fc_handle = find_dissector("fc"); dissector_add_uint("wtap_encap", WTAP_ENCAP_FIBRE_CHANNEL_FC2, fc_handle); fcsof_handle = find_dissector("fcsof"); dissector_add_uint("wtap_encap", WTAP_ENCAP_FIBRE_CHANNEL_FC2_WITH_FRAME_DELIMS, fcsof_handle); data_handle = find_dissector("data"); }