diff options
Diffstat (limited to 'epan/dissectors/packet-fc.c')
| -rw-r--r-- | epan/dissectors/packet-fc.c | 1600 |
1 files changed, 1600 insertions, 0 deletions
diff --git a/epan/dissectors/packet-fc.c b/epan/dissectors/packet-fc.c new file mode 100644 index 00000000..39759145 --- /dev/null +++ b/epan/dissectors/packet-fc.c @@ -0,0 +1,1600 @@ +/* packet-fc.c + * Routines for Fibre Channel Decoding (FC Header, Link Ctl & Basic Link Svc) + * Copyright 2001, Dinesh G Dutt <ddutt@cisco.com> + * Copyright 2003 Ronnie Sahlberg, exchange first/last matching and + * tap listener and misc updates + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/exceptions.h> +#include <epan/prefs.h> +#include <epan/to_str.h> +#include <wiretap/wtap.h> +#include <epan/reassemble.h> +#include <epan/conversation_table.h> +#include <epan/srt_table.h> +#include "packet-fc.h" +#include "packet-fclctl.h" +#include "packet-fcbls.h" +#include <epan/crc32-tvb.h> +#include <epan/expert.h> + +void proto_register_fc(void); +void proto_reg_handoff_fc(void); + +#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 hf_fccrc_status = -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 expert_field ei_fccrc = EI_INIT; +static expert_field ei_short_hdr = EI_INIT; +/* static expert_field ei_frag_size = EI_INIT; */ + +static dissector_handle_t fc_handle, fcsof_handle; +static dissector_table_t fcftype_dissector_table; + +static int fc_tap = -1; + +typedef struct _fc_conv_data_t { + wmem_tree_t *exchanges; + wmem_tree_t *luns; +} fc_conv_data_t; + +/* Reassembly stuff */ +static gboolean fc_reassemble = TRUE; +static guint32 fc_max_frame_size = 1024; +static reassembly_table fc_reassembly_table; + +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 wmem_map_t *fcseq_req_hash = NULL; + +/* + * Hash Functions + */ +static gint +fcseq_equal(gconstpointer v, gconstpointer w) +{ + const fcseq_conv_key_t *v1 = (const fcseq_conv_key_t *)v; + const fcseq_conv_key_t *v2 = (const fcseq_conv_key_t *)w; + + return (v1->conv_idx == v2->conv_idx); +} + +static guint +fcseq_hash (gconstpointer v) +{ + const fcseq_conv_key_t *key = (const fcseq_conv_key_t *)v; + guint val; + + val = key->conv_idx; + + return val; +} + +static const char* fc_conv_get_filter_type(conv_item_t* conv, conv_filter_type_e filter) +{ + if ((filter == CONV_FT_SRC_ADDRESS) && (conv->src_address.type == AT_FC)) + return "fc.s_id"; + + if ((filter == CONV_FT_DST_ADDRESS) && (conv->dst_address.type == AT_FC)) + return "fc.d_id"; + + if ((filter == CONV_FT_ANY_ADDRESS) && (conv->src_address.type == AT_FC)) + return "fc.id"; + + return CONV_FILTER_INVALID; +} + +static ct_dissector_info_t fc_ct_dissector_info = {&fc_conv_get_filter_type}; + +static tap_packet_status +fc_conversation_packet(void *pct, packet_info *pinfo, epan_dissect_t *edt _U_, const void *vip, tap_flags_t flags) +{ + conv_hash_t *hash = (conv_hash_t*) pct; + hash->flags = flags; + const fc_hdr *fchdr=(const fc_hdr *)vip; + + add_conversation_table_data(hash, &fchdr->s_id, &fchdr->d_id, 0, 0, 1, pinfo->fd->pkt_len, &pinfo->rel_ts, &pinfo->abs_ts, &fc_ct_dissector_info, CONVERSATION_NONE); + + return TAP_PACKET_REDRAW; +} + +static const char* fc_endpoint_get_filter_type(endpoint_item_t* endpoint, conv_filter_type_e filter) +{ + if ((filter == CONV_FT_ANY_ADDRESS) && (endpoint->myaddress.type == AT_FC)) + return "fc.id"; + + return CONV_FILTER_INVALID; +} + +static et_dissector_info_t fc_endpoint_dissector_info = {&fc_endpoint_get_filter_type}; + +static tap_packet_status +fc_endpoint_packet(void *pit, packet_info *pinfo, epan_dissect_t *edt _U_, const void *vip, tap_flags_t flags) +{ + conv_hash_t *hash = (conv_hash_t*) pit; + hash->flags = flags; + const fc_hdr *fchdr=(const fc_hdr *)vip; + + /* Take two "add" passes per packet, adding for each direction, ensures that all + packets are counted properly (even if address is sending to itself) + XXX - this could probably be done more efficiently inside endpoint_table */ + add_endpoint_table_data(hash, &fchdr->s_id, 0, TRUE, 1, pinfo->fd->pkt_len, &fc_endpoint_dissector_info, ENDPOINT_NONE); + add_endpoint_table_data(hash, &fchdr->d_id, 0, FALSE, 1, pinfo->fd->pkt_len, &fc_endpoint_dissector_info, ENDPOINT_NONE); + + return TAP_PACKET_REDRAW; +} + +#define FC_NUM_PROCEDURES 256 + +static void +fcstat_init(struct register_srt* srt _U_, GArray* srt_array) +{ + srt_stat_table *fc_srt_table; + guint32 i; + + fc_srt_table = init_srt_table("Fibre Channel Types", NULL, srt_array, FC_NUM_PROCEDURES, NULL, "fc.type", NULL); + for (i = 0; i < FC_NUM_PROCEDURES; i++) + { + gchar* tmp_str = val_to_str_wmem(NULL, i, fc_fc4_val, "Unknown(0x%02x)"); + init_srt_table_row(fc_srt_table, i, tmp_str); + wmem_free(NULL, tmp_str); + } +} + +static tap_packet_status +fcstat_packet(void *pss, packet_info *pinfo, epan_dissect_t *edt _U_, const void *prv, tap_flags_t flags _U_) +{ + guint i = 0; + srt_stat_table *fc_srt_table; + srt_data_t *data = (srt_data_t *)pss; + const fc_hdr *fc=(const fc_hdr *)prv; + + /* we are only interested in reply packets */ + if(!(fc->fctl&FC_FCTL_EXCHANGE_RESPONDER)){ + return TAP_PACKET_DONT_REDRAW; + } + /* if we havnt seen the request, just ignore it */ + if ( (!fc->fc_ex) || (fc->fc_ex->first_exchange_frame==0) ){ + return TAP_PACKET_DONT_REDRAW; + } + + fc_srt_table = g_array_index(data->srt_array, srt_stat_table*, i); + add_srt_table_data(fc_srt_table, fc->type, &fc->fc_ex->fc_time, pinfo); + + return TAP_PACKET_REDRAW; +} + + +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 EOFN_NEG 0xBC95D5D5 +#define EOFN_POS 0xBCB5D5D5 +#define EOFNI_NEG 0xBC8AD5D5 +#define EOFNI_POS 0xBCAAD5D5 +#define EOFDTI_NEG 0xBC8A9595 +#define EOFDTI_POS 0xBCAA9595 +#define EOFRT_NEG 0xBC959999 +#define EOFRT_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" }, + {EOFN_NEG, "EOFn- - EOF Normal" }, + {EOFN_POS, "EOFn+ - EOF Normal" }, + {EOFNI_NEG, "EOFni- - EOF Normal Invalid" }, + {EOFNI_POS, "EOFni+ - EOF Normal Invalid" }, + {EOFDTI_NEG, "EOFdti- - EOF Disconnect-Terminate-Invalid Class 1 (Obsolete)" }, + {EOFDTI_POS, "EOFdti+ - EOF Disconnect-Terminate-Invalid Class 1 (Obsolete)" }, + {EOFRT_NEG, "EOFrt- - EOF Remove-Terminate Class 4 (Obsolete)" }, + {EOFRT_POS, "EOFrt+ - EOF Remove-Terminate Class 4 (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_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) { + acc_tree = proto_tree_add_subtree(tree, tvb, 0, -1, ett_fcbls, NULL, "Basic Link Svc"); + + 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_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) { + rjt_tree = proto_tree_add_subtree(tree, tvb, 0, -1, ett_fcbls, NULL, "Basic Link Svc"); + + 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} +}; +#if 0 +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} +}; +#endif +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; + proto_tree *tree; + 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); + + item = proto_tree_add_uint_format_value(parent_tree, hf_fc_vft, tvb, offset, + 8, vf_id, "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) +{ + static int * const flags[] = { + &hf_fc_fctl_exchange_responder, + &hf_fc_fctl_seq_recipient, + &hf_fc_fctl_exchange_first, + &hf_fc_fctl_exchange_last, + &hf_fc_fctl_seq_last, + &hf_fc_fctl_priority, + &hf_fc_fctl_transfer_seq_initiative, + &hf_fc_fctl_last_data_frame, + &hf_fc_fctl_ack_0_1, + &hf_fc_fctl_rexmitted_seq, + &hf_fc_fctl_abts_ack, + &hf_fc_fctl_rel_offset, + NULL + }; + + proto_tree_add_bitmask_with_flags(parent_tree, tvb, offset, hf_fc_fctl, + ett_fctl, flags, ENC_BIG_ENDIAN, BMT_NO_INT); +} + +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, fc_data_t* fc_data) +{ + /* Set up structures needed to add the protocol subtree and manage it */ + proto_item *ti, *hidden_item; + proto_tree *fc_tree; + tvbuff_t *next_tvb; + int offset = 0, next_offset; + int vft_offset = -1; + gboolean is_lastframe_inseq, is_1frame_inseq, is_exchg_resp = 0; + fragment_head *fcfrag_head; + guint32 frag_id, frag_size; + guint8 df_ctl, seq_id; + guint32 f_ctl; + address addr; + + guint32 param, exchange_key; + guint16 real_seqcnt; + guint8 ftype; + + fc_hdr* fchdr = wmem_new(pinfo->pool, fc_hdr); /* Needed by conversations, not just tap */ + fc_exchange_t *fc_ex; + fc_conv_data_t *fc_conv_data=NULL; + + conversation_t *conversation; + fcseq_conv_data_t *cdata; + fcseq_conv_key_t ckey, *req_key; + + /* 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); + fchdr->fc_ex = NULL; + + /* + * 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) { + 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_tvb (&pinfo->dst, AT_FC, 3, tvb, offset+1); + set_address_tvb (&pinfo->src, AT_FC, 3, tvb, offset+5); + conversation_set_conv_addr_port_endpoints(pinfo, &pinfo->src, &pinfo->dst, CONVERSATION_EXCHG, 0, 0); + } else { + conversation_set_conv_addr_port_endpoints(pinfo, &pinfo->src, &pinfo->dst, CONVERSATION_EXCHG, pinfo->srcport, pinfo->destport); + } + 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); + + /* 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); + fc_conv_data=(fc_conv_data_t *)conversation_get_proto_data(conversation, proto_fc); + if(!fc_conv_data){ + fc_conv_data=wmem_new(wmem_file_scope(), fc_conv_data_t); + fc_conv_data->exchanges=wmem_tree_new(wmem_file_scope()); + fc_conv_data->luns=wmem_tree_new(wmem_file_scope()); + conversation_add_proto_data(conversation, proto_fc, fc_conv_data); + } + + /* Set up LUN data. OXID + LUN make up unique exchanges, but LUN is populated in subdissectors + and not necessarily in every frame. Stub it here for now */ + fchdr->lun = 0xFFFF; + if (pinfo->fd->visited) { + fchdr->lun = (guint16)GPOINTER_TO_UINT(wmem_tree_lookup32(fc_conv_data->luns, fchdr->oxid)); + } + + /* In the interest of speed, if "tree" is NULL, don't do any work not + necessary to generate protocol tree items. */ + 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); + + /*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 = (((fc_data->sof_eof & FC_DATA_SOF_FIRST_FRAME) == FC_DATA_SOF_FIRST_FRAME) || + (((fc_data->sof_eof & FC_DATA_SOF_SOFF) == FC_DATA_SOF_SOFF) && + (fchdr->seqcnt == 0))); + + is_lastframe_inseq = ((fc_data->sof_eof & FC_DATA_EOF_LAST_FRAME) == FC_DATA_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); + + 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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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_value(fc_tree, hf_fc_rctl, tvb, offset, + FC_RCTL_SIZE, fchdr->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? */ + set_address(&addr, AT_FC, 3, fchdr->d_id.data); + proto_tree_add_item(fc_tree, hf_fc_did, tvb, offset+1, 3, ENC_NA); + hidden_item = proto_tree_add_item (fc_tree, hf_fc_id, tvb, offset+1, 3, ENC_NA); + 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? */ + set_address(&addr, AT_FC, 3, fchdr->s_id.data); + proto_tree_add_item(fc_tree, hf_fc_sid, tvb, offset+5, 3, ENC_NA); + hidden_item = proto_tree_add_item (fc_tree, hf_fc_id, tvb, offset+5, 3, ENC_NA); + 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_value(fc_tree, hf_fc_type, tvb, + offset+8, FC_TYPE_SIZE, + fchdr->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_value(fc_tree, hf_fc_param, tvb, + offset+20, 4, param, + "0x%x(%s)", param, + fclctl_get_paramstr (pinfo->pool, (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_value(fc_tree, hf_fc_param, tvb, + offset+20, 4, param, + "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) { + proto_tree_add_item(fc_tree, hf_fc_nh_da, tvb, next_offset, 8, ENC_NA); + proto_tree_add_item(fc_tree, hf_fc_nh_sa, tvb, next_offset+8, 8, ENC_NA); + 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) { + proto_tree_add_expert(fc_tree, pinfo, &ei_short_hdr, + tvb, 0, tvb_reported_length(tvb)); + return; + } + + 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 (fc_data->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))) { + proto_tree_add_expert(fc_tree, pinfo, &ei_short_hdr, + tvb, FC_HEADER_SIZE, frag_size); + return; + } + frag_size -= MDSHDR_TRAILER_SIZE; + } else if (fc_data->ethertype == ETHERTYPE_BRDWALK) { + if (frag_size <= 8) { + proto_tree_add_expert(fc_tree, pinfo, &ei_short_hdr, + tvb, FC_HEADER_SIZE, frag_size); + return; + } + 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->conv_index; + + cdata = (fcseq_conv_data_t *)wmem_map_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 = wmem_new(wmem_file_scope(), fcseq_conv_key_t); + req_key->conv_idx = conversation->conv_index; + + cdata = wmem_new(wmem_file_scope(), fcseq_conv_data_t); + cdata->seq_cnt = fchdr->seqcnt; + + wmem_map_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 = ((fchdr->oxid << 16) ^ seq_id) | is_exchg_resp ; + + /* We assume that all frames are of the same max size */ + fcfrag_head = fragment_add (&fc_reassembly_table, + tvb, FC_HEADER_SIZE, + pinfo, frag_id, NULL, + real_seqcnt * fc_max_frame_size, + frag_size, + !is_lastframe_inseq); + + if (fcfrag_head) { + next_tvb = tvb_new_chain(tvb, fcfrag_head->tvb_data); + + /* Add the defragmented data to the data source list. */ + add_new_data_source(pinfo, next_tvb, "Reassembled FC"); + + hidden_item = proto_tree_add_boolean (fc_tree, hf_fc_reassembled, + tvb, offset+9, 1, 1); + proto_item_set_hidden(hidden_item); + } + else { + 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_data_dissector(next_tvb, pinfo, tree); + return; + } + } + } else { + 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_data_dissector(next_tvb, pinfo, tree); + } else { + if (!dissector_try_uint_new (fcftype_dissector_table, ftype, + next_tvb, pinfo, tree, FALSE, fchdr)) { + call_data_dissector(next_tvb, pinfo, tree); + } + } + } 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"); + } + } + + /* Lun is only populated by subdissectors, and subsequent packets assume the same lun. + The only way that consistently works is to save the lun on the first pass (with OXID as + key) when packets are guaranteed to be parsed consecutively */ + + /* Set up LUN data */ + if (!pinfo->fd->visited) { + wmem_tree_insert32(fc_conv_data->luns, fchdr->oxid, GUINT_TO_POINTER((guint)fchdr->lun)); + } + + exchange_key = ((fchdr->oxid & 0xFFFF) | ((fchdr->lun << 16) & 0xFFFF0000)); + + /* 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=(fc_exchange_t*)wmem_tree_lookup32(fc_conv_data->exchanges, exchange_key); + if(!fc_ex){ + fc_ex=wmem_new(wmem_file_scope(), fc_exchange_t); + fc_ex->first_exchange_frame=0; + fc_ex->last_exchange_frame=0; + fc_ex->fc_time=pinfo->abs_ts; + + wmem_tree_insert32(fc_conv_data->exchanges, exchange_key, fc_ex); + } + + fchdr->fc_ex = fc_ex; + + /* XXX: The ACK_1 frames (and other LINK_CONTROL frames) should + * probably be ignored (or treated specially) for SRT purposes, + * and not used to change the first exchange frame or start time + * of an exchange. + */ + + /* populate the exchange struct */ + if(!pinfo->fd->visited){ + if(fchdr->fctl&FC_FCTL_EXCHANGE_FIRST){ + fc_ex->first_exchange_frame=pinfo->num; + fc_ex->fc_time = pinfo->abs_ts; + } + if(fchdr->fctl&FC_FCTL_EXCHANGE_LAST){ + fc_ex->last_exchange_frame=pinfo->num; + } + } + + /* 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->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); + } + + tap_queue_packet(fc_tap, pinfo, fchdr); +} + +static int +dissect_fc (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) +{ + fc_data_t* fc_data = (fc_data_t*)data; + + if (!fc_data) + return 0; + + dissect_fc_helper (tvb, pinfo, tree, FALSE, fc_data); + return tvb_captured_length(tvb); +} + +static int +dissect_fc_wtap (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) +{ + fc_data_t fc_data; + + fc_data.ethertype = ETHERTYPE_UNK; + fc_data.sof_eof = 0; + + dissect_fc_helper (tvb, pinfo, tree, FALSE, &fc_data); + return tvb_captured_length(tvb); +} + +static int +dissect_fc_ifcp (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data) +{ + fc_data_t* fc_data = (fc_data_t*)data; + + if (!fc_data) + return 0; + + dissect_fc_helper (tvb, pinfo, tree, TRUE, fc_data); + return tvb_captured_length(tvb); +} + +static int +dissect_fcsof(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { + + proto_item *it; + proto_tree *fcsof_tree; + tvbuff_t *next_tvb; + guint32 sof; + guint32 crc_computed; + guint32 eof; + const gint FCSOF_TRAILER_LEN = 8; + const gint FCSOF_HEADER_LEN = 4; + gint crc_offset = tvb_reported_length(tvb) - FCSOF_TRAILER_LEN; + gint eof_offset = crc_offset + 4; + gint sof_offset = 0; + gint frame_len_for_checksum; + fc_data_t fc_data; + + col_set_str(pinfo->cinfo, COL_PROTOCOL, "FC"); + + /* Get SOF */ + sof = tvb_get_ntohl(tvb, 0); + + /* GET Computed CRC */ + frame_len_for_checksum = crc_offset - FCSOF_HEADER_LEN; + crc_computed = crc32_802_tvb(tvb_new_subset_length(tvb, 4, frame_len_for_checksum), 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); + + proto_tree_add_checksum(fcsof_tree, tvb, crc_offset, hf_fccrc, hf_fccrc_status, &ei_fccrc, pinfo, crc_computed, ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY); + + proto_tree_add_uint(fcsof_tree, hf_fceof, tvb, eof_offset, 4, eof); + + next_tvb = tvb_new_subset_length(tvb, 4, crc_offset-4); + + fc_data.ethertype = ETHERTYPE_UNK; + fc_data.sof_eof = 0; + if (sof == FC_SOFI2 || sof == FC_SOFI3) { + fc_data.sof_eof = FC_DATA_SOF_FIRST_FRAME; + } else if (sof == FC_SOFF) { + fc_data.sof_eof = FC_DATA_SOF_SOFF; + } + + if (eof == EOFT_POS || eof == EOFT_NEG) { + fc_data.sof_eof |= FC_DATA_EOF_LAST_FRAME; + } else if (eof == EOFDTI_NEG || eof == EOFDTI_POS) { + fc_data.sof_eof |= FC_DATA_EOF_INVALID; + } + + /* Call FC dissector */ + call_dissector_with_data(fc_handle, next_tvb, pinfo, tree, &fc_data); + return tvb_captured_length(tvb); +} + +/* 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_BYTES, SEP_DOT, 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_BYTES, SEP_DOT, NULL, 0x0, + "Source Address", HFILL}}, + { &hf_fc_id, + {"Addr", "fc.id", FT_BYTES, SEP_DOT, 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_FCWWN, BASE_NONE, NULL, + 0x0, NULL, HFILL}}, + { &hf_fc_nh_sa, + {"Network SA", "fc.nethdr.sa", FT_FCWWN, 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}}, +#if 0 + { &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}}, +#endif + { &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.pri", 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 + }; + + static ei_register_info ei[] = { + { &ei_fccrc, + { "fc.crc.bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }}, + { &ei_short_hdr, + { "fc.short_hdr", PI_MALFORMED, PI_ERROR, + "Packet length is shorter than the required header", EXPFILL }}, +#if 0 + { &ei_frag_size, + { "fc.frag_size", PI_MALFORMED, PI_ERROR, + "Invalid fragment size", EXPFILL }} +#endif + }; + + module_t *fc_module; + expert_module_t* expert_fc; + + /* 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 }}, + { &hf_fccrc_status, + { "CRC Status", "fc.crc.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals), 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"); + fc_handle = 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)); + expert_fc = expert_register_protocol(proto_fc); + expert_register_field_array(expert_fc, ei, array_length(ei)); + + /* subdissectors called through this table will find the fchdr structure + * through data parameter of dissector + */ + fcftype_dissector_table = register_dissector_table ("fc.ftype", + "FC Frame Type", + proto_fc, 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); + + fcseq_req_hash = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), fcseq_hash, fcseq_equal); + + reassembly_table_register(&fc_reassembly_table, + &addresses_reassembly_table_functions); + + + /* 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)); + + fcsof_handle = register_dissector("fcsof", dissect_fcsof, proto_fcsof); + + register_conversation_table(proto_fc, TRUE, fc_conversation_packet, fc_endpoint_packet); + register_srt_table(proto_fc, NULL, 1, fcstat_packet, fcstat_init, NULL); +} + + +/* 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_add_uint("wtap_encap", WTAP_ENCAP_FIBRE_CHANNEL_FC2, + create_dissector_handle(dissect_fc_wtap, proto_fc)); + + dissector_add_uint("wtap_encap", WTAP_ENCAP_FIBRE_CHANNEL_FC2_WITH_FRAME_DELIMS, fcsof_handle); +} + +/* + * Editor modelines - https://www.wireshark.org/tools/modelines.html + * + * Local variables: + * c-basic-offset: 4 + * tab-width: 8 + * indent-tabs-mode: nil + * End: + * + * vi: set shiftwidth=4 tabstop=8 expandtab: + * :indentSize=4:tabSize=8:noTabs=true: + */ |