e487575362
In dissect_nds_request(): Fill in fieds of the ncp_record structure only on the first pass; once the first pass is complete, the structure's fully filled in. That fixes cases where NDS replies aren't fully dissected because the NDS verb isn't added to the ncp_record structure when the request is dissected. Fill in elements as soon as we have the value needed to fill it in, so that it's filled in even if we throw an exception later, and so that it's filled in only if we have the value in the packet, so that a valid value isn't overwritten by a later packet that doesn't have the value. This fixes cases where, in the second pass, NDS replies aren't fully dissected because the NDS verb is overwritten in the ncp_record structure when a continuation of the request is dissected. Note that we should perhaps make the object_name field a pointer to a wmem-allocated string, so that NULL can indicate "not set, hence not known".
165 lines
4 KiB
C
165 lines
4 KiB
C
/* packet-ncp-int.h
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* Structures and functions for NetWare Core Protocol.
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* Gilbert Ramirez <gram@alumni.rice.edu>
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* Modified for NDS support by Greg Morris (gmorris@novell.com)
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*
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* Portions Copyright (c) Gilbert Ramirez 2000-2002
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* Portions Copyright (c) Novell, Inc. 2000-2003
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2000 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __PACKET_NCP_INT_H__
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#define __PACKET_NCP_INT_H__
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#include <epan/expert.h>
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#include <epan/ptvcursor.h>
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typedef struct _ptvc_record ptvc_record;
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typedef struct _sub_ptvc_record sub_ptvc_record;
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typedef struct {
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int *hf_ptr;
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const char *first_string;
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const char *repeat_string;
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} info_string_t;
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struct _ptvc_record {
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int *hf_ptr;
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gint length;
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const sub_ptvc_record *sub_ptvc_rec;
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const info_string_t *req_info_str;
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unsigned int endianness;
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unsigned int var_index : 2;
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unsigned int repeat_index : 2;
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unsigned int req_cond_index : 8;
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};
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/*
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* Every NCP packet has this common header (except for burst packets).
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*/
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struct ncp_common_header {
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guint16 type;
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guint8 sequence;
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guint8 conn_low;
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guint8 task;
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guint8 conn_high; /* type=0x5555 doesn't have this */
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};
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extern gboolean nds_defragment;
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extern gboolean nds_echo_eid;
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extern gboolean ncp_echo_err;
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extern gboolean ncp_echo_conn;
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extern gboolean ncp_echo_server;
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extern gboolean ncp_echo_file;
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extern gboolean ncp_newstyle;
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struct _sub_ptvc_record {
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gint *ett;
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const char *descr;
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const ptvc_record *ptvc_rec;
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};
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typedef struct {
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const char *dfilter_text;
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struct epan_dfilter *dfilter;
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} conditional_record;
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struct novell_tap {
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int stat;
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int hdr;
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};
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typedef struct novell_tap _novell_tap;
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typedef struct {
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guint8 error_in_packet;
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gint ncp_error_index;
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} error_equivalency;
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struct _ncp_record;
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typedef void (ncp_expert_handler)(ptvcursor_t *ptvc, packet_info *pinfo, const struct _ncp_record *ncp_rec, gboolean request);
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typedef struct _ncp_record {
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guint8 func;
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guint8 subfunc;
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guint8 has_subfunc;
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const gchar* name;
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gint group;
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const ptvc_record *request_ptvc;
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const ptvc_record *reply_ptvc;
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const error_equivalency *errors;
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const int *req_cond_indexes;
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unsigned int req_cond_size_type;
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ncp_expert_handler *expert_handler_func;
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} ncp_record;
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/*
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* XXX - should the object_name be a pointer, initialized to null,
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* and set to a wmem-allocated copy of the full string?
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*/
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typedef struct {
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const ncp_record *ncp_rec;
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gboolean *req_cond_results;
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guint32 req_frame_num;
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nstime_t req_frame_time;
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guint16 length;
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guint32 req_nds_flags;
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guint32 req_nds_prot_flags;
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guint8 nds_request_verb;
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guint8 nds_version;
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char object_name[256];
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gboolean nds_frag;
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guint32 nds_end_frag;
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guint32 nds_frag_num;
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guint16 req_mask;
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guint16 req_mask_ext;
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guint32 nds_frag_flags;
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} ncp_req_hash_value;
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WS_DLL_PUBLIC const value_string sss_verb_enum[];
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WS_DLL_PUBLIC const value_string nmas_subverb_enum[];
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WS_DLL_PUBLIC const value_string ncp_nds_verb_vals[];
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void dissect_ncp_request(tvbuff_t*, packet_info*, guint32,
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guint8, guint16, gboolean, proto_tree *volatile);
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void dissect_ncp_reply(tvbuff_t *, packet_info*, guint32, guint8,
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guint16, proto_tree*, struct novell_tap*);
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void dissect_ping_req(tvbuff_t *, packet_info*, guint32, guint8,
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guint16, proto_tree*);
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void dissect_nds_request(tvbuff_t*, packet_info*, guint32,
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guint8, guint16, proto_tree*);
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void nds_defrag(tvbuff_t*, packet_info*, guint32,
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guint8, guint16, proto_tree*, struct novell_tap*);
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extern int proto_ncp;
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extern gint ett_ncp;
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extern gint ett_nds;
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extern gint ett_nds_segments;
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extern gint ett_nds_segment;
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/*extern dissector_handle_t nds_data_handle;*/
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/*
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* NCP packet types.
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*/
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#define NCP_ALLOCATE_SLOT 0x1111
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#define NCP_SERVICE_REQUEST 0x2222
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#define NCP_SERVICE_REPLY 0x3333
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#define NCP_WATCHDOG 0x3e3e
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#define NCP_DEALLOCATE_SLOT 0x5555
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#define NCP_BURST_MODE_XFER 0x7777
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#define NCP_POSITIVE_ACK 0x9999
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#define NCP_BROADCAST_SLOT 0xbbbb
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#define NCP_LIP_ECHO 0x4c69
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#endif
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