forked from osmocom/wireshark
142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/* packet-smb-common.c
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* Common routines for smb packet dissection
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* Copyright 2000, Jeffrey C. Foster <jfoste@woodward.com>
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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 1998 Gerald Combs
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*
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* Copied from packet-pop.c
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/strutil.h>
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#include "packet-smb-common.h"
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#include "packet-dns.h"
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/*
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* Share type values - used in LANMAN and in SRVSVC.
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*
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* XXX - should we dissect share type values, at least in SRVSVC, as
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* a subtree with bitfields, as the 0x80000000 bit appears to be a
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* hidden bit, with some number of bits at the bottom being the share
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* type?
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*
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* Does LANMAN use that bit?
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*/
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const value_string share_type_vals[] = {
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{0, "Directory tree"},
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{1, "Printer queue"},
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{2, "Communications device"},
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{3, "IPC"},
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{0x80000000, "Hidden Directory tree"},
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{0x80000001, "Hidden Printer queue"},
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{0x80000002, "Hidden Communications device"},
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{0x80000003, "Hidden IPC"},
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{0, NULL}
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};
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int display_ms_string(tvbuff_t *tvb, proto_tree *tree, int offset, int hf_index, char **data)
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{
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char *str;
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gint len;
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/* display a string from the tree and return the new offset */
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str = tvb_get_stringz_enc(wmem_packet_scope(), tvb, offset, &len, ENC_ASCII);
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proto_tree_add_string(tree, hf_index, tvb, offset, len, str);
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/* Return a copy of the string if requested */
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if (data)
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*data = str;
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return offset+len;
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}
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int display_unicode_string(tvbuff_t *tvb, proto_tree *tree, int offset, int hf_index, char **data)
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{
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char *str, *p;
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int len;
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int charoffset;
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guint16 character;
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/* display a unicode string from the tree and return new offset */
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/*
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* Get the length of the string.
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* XXX - is it a bug or a feature that this will throw an exception
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* if we don't find the '\0'? I think it's a feature.
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*/
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len = 0;
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while (tvb_get_letohs(tvb, offset + len) != '\0')
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len += 2;
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len += 2; /* count the '\0' too */
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/*
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* Allocate a buffer for the string; "len" is the length in
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* bytes, not the length in characters.
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*/
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str = (char *)wmem_alloc(wmem_packet_scope(), len/2);
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/*
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* XXX - this assumes the string is just ISO 8859-1; we need
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* to better handle multiple character sets in Wireshark,
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* including Unicode/ISO 10646, and multiple encodings of
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* that character set (UCS-2, UTF-8, etc.).
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*/
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charoffset = offset;
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p = str;
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while ((character = tvb_get_letohs(tvb, charoffset)) != '\0') {
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*p++ = (char) character;
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charoffset += 2;
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}
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*p = '\0';
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proto_tree_add_string(tree, hf_index, tvb, offset, len, str);
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if (data)
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*data = str;
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return offset+len;
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}
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/* Max string length for displaying Unicode strings. */
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#define MAX_UNICODE_STR_LEN 256
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int dissect_ms_compressed_string(tvbuff_t *tvb, proto_tree *tree, int offset, int hf_index,
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const char **data)
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{
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int compr_len;
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gint str_len;
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const gchar *str = NULL;
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/* The name data MUST start at offset 0 of the tvb */
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compr_len = get_dns_name(tvb, offset, MAX_UNICODE_STR_LEN+3+1, 0, &str, &str_len);
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proto_tree_add_string(tree, hf_index, tvb, offset, compr_len, format_text(wmem_packet_scope(), str, str_len));
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if (data)
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*data = str;
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return offset + compr_len;
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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