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wireshark/epan/dissectors/packet-xml.c

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/* packet-xml.c
* wireshark's xml dissector .
*
* (C) 2005, Luis E. Garcia Ontanon.
*
* Refer to the AUTHORS file or the AUTHORS section in the man page
* for contacting the author(s) of this file.
*
* 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 <string.h>
#include <errno.h>
#include <epan/packet.h>
#include <epan/tvbparse.h>
#include <epan/dtd.h>
#include <epan/proto_data.h>
#include <wsutil/filesystem.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/garrayfix.h>
#include <wsutil/str_util.h>
#include <wsutil/report_message.h>
#include "packet-xml.h"
#include "packet-acdr.h"
void proto_register_xml(void);
void proto_reg_handoff_xml(void);
struct _attr_reg_data {
wmem_array_t *hf;
const gchar *basename;
};
static gint ett_dtd = -1;
static gint ett_xmpli = -1;
static int hf_unknowwn_attrib = -1;
static int hf_comment = -1;
static int hf_xmlpi = -1;
static int hf_dtd_tag = -1;
static int hf_doctype = -1;
static int hf_cdatasection = -1;
static expert_field ei_xml_closing_unopened_tag = EI_INIT;
static expert_field ei_xml_closing_unopened_xmpli_tag = EI_INIT;
static expert_field ei_xml_unrecognized_text = EI_INIT;
/* dissector handles */
static dissector_handle_t xml_handle;
/* parser definitions */
static tvbparse_wanted_t *want;
static tvbparse_wanted_t *want_ignore;
static tvbparse_wanted_t *want_heur;
static wmem_map_t *xmpli_names;
static wmem_map_t *media_types;
static xml_ns_t xml_ns = {"xml", "/", -1, -1, -1, NULL, NULL, NULL};
static xml_ns_t unknown_ns = {"unknown", "?", -1, -1, -1, NULL, NULL, NULL};
static xml_ns_t *root_ns;
static gboolean pref_heuristic_unicode = FALSE;
#define XML_CDATA -1000
#define XML_SCOPED_NAME -1001
static wmem_array_t *hf_arr;
static GArray *ett_arr;
static const gchar *default_media_types[] = {
"text/xml",
"text/vnd.wap.wml",
"text/vnd.wap.si",
"text/vnd.wap.sl",
"text/vnd.wap.co",
"text/vnd.wap.emn",
"application/3gpp-ims+xml",
"application/atom+xml",
"application/auth-policy+xml",
"application/ccmp+xml",
"application/conference-info+xml", /*RFC4575*/
"application/cpim-pidf+xml",
"application/cpl+xml",
"application/dds-web+xml",
"application/im-iscomposing+xml", /*RFC3994*/
"application/load-control+xml", /*RFC7200*/
"application/mathml+xml",
"application/media_control+xml",
"application/note+xml",
"application/pidf+xml",
"application/pidf-diff+xml",
"application/poc-settings+xml",
"application/rdf+xml",
"application/reginfo+xml",
"application/resource-lists+xml",
"application/rlmi+xml",
"application/rls-services+xml",
"application/rss+xml",
"application/rs-metadata+xml",
"application/smil",
"application/simple-filter+xml",
"application/simple-message-summary+xml", /*RFC3842*/
"application/simservs+xml",
"application/soap+xml",
"application/vnd.etsi.aoc+xml",
"application/vnd.etsi.cug+xml",
"application/vnd.etsi.iptvcommand+xml",
"application/vnd.etsi.iptvdiscovery+xml",
"application/vnd.etsi.iptvprofile+xml",
"application/vnd.etsi.iptvsad-bc+xml",
"application/vnd.etsi.iptvsad-cod+xml",
"application/vnd.etsi.iptvsad-npvr+xml",
"application/vnd.etsi.iptvservice+xml",
"application/vnd.etsi.iptvsync+xml",
"application/vnd.etsi.iptvueprofile+xml",
"application/vnd.etsi.mcid+xml",
"application/vnd.etsi.overload-control-policy-dataset+xml",
"application/vnd.etsi.pstn+xml",
"application/vnd.etsi.sci+xml",
"application/vnd.etsi.simservs+xml",
"application/vnd.etsi.tsl+xml",
"application/vnd.oma.xdm-apd+xml",
"application/vnd.oma.fnl+xml",
"application/vnd.oma.access-permissions-list+xml",
"application/vnd.oma.alias-principals-list+xml",
"application/upp-directory+xml", /*OMA-ERELD-XDM-V2_2_1-20170124-A*/
"application/vnd.oma.xdm-hi+xml",
"application/vnd.oma.xdm-rhi+xml",
"application/vnd.oma.xdm-prefs+xml",
"application/vnd.oma.xdcp+xml",
"application/vnd.oma.bcast.associated-procedure-parameter+xml",
"application/vnd.oma.bcast.drm-trigger+xml",
"application/vnd.oma.bcast.imd+xml",
"application/vnd.oma.bcast.notification+xml",
"application/vnd.oma.bcast.sgdd+xml",
"application/vnd.oma.bcast.smartcard-trigger+xml",
"application/vnd.oma.bcast.sprov+xml",
"application/vnd.oma.cab-address-book+xml",
"application/vnd.oma.cab-feature-handler+xml",
"application/vnd.oma.cab-pcc+xml",
"application/vnd.oma.cab-subs-invite+xml",
"application/vnd.oma.cab-user-prefs+xml",
"application/vnd.oma.dd2+xml",
"application/vnd.oma.drm.risd+xml",
"application/vnd.oma.group-usage-list+xml",
"application/vnd.oma.pal+xml",
"application/vnd.oma.poc.detailed-progress-report+xml",
"application/vnd.oma.poc.final-report+xml",
"application/vnd.oma.poc.groups+xml",
"application/vnd.oma.poc.invocation-descriptor+xml",
"application/vnd.oma.poc.optimized-progress-report+xml",
"application/vnd.oma.scidm.messages+xml",
"application/vnd.oma.suppnot+xml", /*OMA-ERELD-Presence_SIMPLE-V2_0-20120710-A*/
"application/vnd.oma.xcap-directory+xml",
"application/vnd.omads-email+xml",
"application/vnd.omads-file+xml",
"application/vnd.omads-folder+xml",
"application/vnd.3gpp.access-transfer-events+xml",
"application/vnd.3gpp.bsf+xml",
"application/vnd.3gpp.comm-div-info+xml", /*3GPP TS 24.504 version 8.19.0*/
"application/vnd.3gpp.cw+xml",
"application/vnd.3gpp.iut+xml", /*3GPP TS 24.337*/
"application/vnc.3gpp.iut-config+xml", /*3GPP TS 24.337*/
"application/vnd.3gpp.mid-call+xml",
"application/vnd.3gpp-prose-pc3ch+xml",
"application/vnd.3gpp-prose+xml",
"application/vnd.3gpp.replication+xml", /*3GPP TS 24.337*/
"application/vnd.3gpp.sms+xml",
"application/vnd.3gpp.srvcc-info+xml",
"application/vnd.3gpp.srvcc-ext+xml",
"application/vnd.3gpp.state-and-event-info+xml",
"application/vnd.3gpp.ussd+xml",
"application/vnd.3gpp2.bcmcsinfo+xml",
"application/vnd.wv.csp+xml",
"application/vnd.wv.csp.xml",
"application/watcherinfo+xml",
"application/xcap-att+xml",
"application/xcap-caps+xml",
"application/xcap-diff+xml",
"application/xcap-el+xml",
"application/xcap-error+xml",
"application/xcap-ns+xml",
"application/xml",
"application/xml-dtd",
"application/xpidf+xml",
"application/xslt+xml",
"application/x-crd+xml",
"application/x-wms-logconnectstats",
"application/x-wms-logplaystats",
"application/x-wms-sendevent",
"image/svg+xml",
"message/imdn+xml", /*RFC5438*/
};
static void insert_xml_frame(xml_frame_t *parent, xml_frame_t *new_child)
{
new_child->first_child = NULL;
new_child->last_child = NULL;
new_child->parent = parent;
new_child->next_sibling = NULL;
new_child->prev_sibling = NULL;
if (parent == NULL) return; /* root */
if (parent->first_child == NULL) { /* the 1st child */
parent->first_child = new_child;
} else { /* following children */
parent->last_child->next_sibling = new_child;
new_child->prev_sibling = parent->last_child;
}
parent->last_child = new_child;
}
static int
dissect_xml(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
tvbparse_t *tt;
static GPtrArray *stack;
xml_frame_t *current_frame;
const char *colinfo_str;
tvbuff_t *decoded;
guint16 try_bom;
int start_offset = 0;
if (stack != NULL)
g_ptr_array_free(stack, TRUE);
stack = g_ptr_array_new();
current_frame = wmem_new(wmem_packet_scope(), xml_frame_t);
current_frame->type = XML_FRAME_ROOT;
current_frame->name = NULL;
current_frame->name_orig_case = NULL;
current_frame->value = NULL;
current_frame->pinfo = pinfo;
insert_xml_frame(NULL, current_frame);
g_ptr_array_add(stack, current_frame);
/* Detect and act on possible byte-order mark (BOM) */
try_bom = tvb_get_ntohs(tvb, start_offset);
if (try_bom == 0xFEFF) {
/* UTF-16BE */
const guint8 *data_str = tvb_get_string_enc(pinfo->pool, tvb, 0, tvb_captured_length(tvb), ENC_UTF_16|ENC_BIG_ENDIAN);
size_t l = strlen(data_str);
decoded = tvb_new_child_real_data(tvb, data_str, (guint)l, (gint)l);
add_new_data_source(pinfo, decoded, "Decoded UTF-16BE text");
}
else if(try_bom == 0xFFFE) {
/* UTF-16LE (or possibly UTF-32LE, but Wireshark doesn't support UTF-32) */
const guint8 *data_str = tvb_get_string_enc(pinfo->pool, tvb, 0, tvb_captured_length(tvb), ENC_UTF_16|ENC_LITTLE_ENDIAN);
size_t l = strlen(data_str);
decoded = tvb_new_child_real_data(tvb, data_str, (guint)l, (gint)l);
add_new_data_source(pinfo, decoded, "Decoded UTF-16LE text");
}
/* Could also test if try_bom is 0xnn00 or 0x00nn to guess endianness if we wanted */
else if(tvb_get_ntoh24(tvb, start_offset) == 0xEFBBBF) {
/* UTF-8 BOM; just skip over it */
decoded = tvb;
start_offset += 3;
}
else {
/* Assume it's UTF-8 */
decoded = tvb;
}
tt = tvbparse_init(decoded, start_offset, -1, stack, want_ignore);
current_frame->start_offset = 0;
current_frame->length = tvb_captured_length(decoded) - start_offset;
root_ns = NULL;
if (pinfo->match_string)
root_ns = (xml_ns_t *)wmem_map_lookup(media_types, pinfo->match_string);
if (! root_ns ) {
root_ns = &xml_ns;
colinfo_str = "/XML";
} else {
char *colinfo_str_buf;
colinfo_str_buf = wmem_strconcat(wmem_packet_scope(), "/", root_ns->name, NULL);
ascii_strup_inplace(colinfo_str_buf);
colinfo_str = colinfo_str_buf;
}
col_append_str(pinfo->cinfo, COL_PROTOCOL, colinfo_str);
current_frame->ns = root_ns;
current_frame->item = proto_tree_add_item(tree, current_frame->ns->hf_tag, decoded, start_offset, -1, ENC_UTF_8|ENC_NA);
current_frame->tree = proto_item_add_subtree(current_frame->item, current_frame->ns->ett);
current_frame->last_item = current_frame->item;
while(tvbparse_get(tt, want)) ;
/* Save XML structure in case it is useful for the caller (only XMPP for now) */
p_add_proto_data(pinfo->pool, pinfo, xml_ns.hf_tag, 0, current_frame);
return tvb_captured_length(tvb);
}
static gboolean dissect_xml_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
if (tvbparse_peek(tvbparse_init(tvb, 0, -1, NULL, want_ignore), want_heur)) {
dissect_xml(tvb, pinfo, tree, data);
return TRUE;
} else if (pref_heuristic_unicode) {
const guint8 *data_str;
tvbuff_t *unicode_tvb;
guint16 try_bom;
/* XXX - UCS-2, or UTF-16? */
gint enc = ENC_UCS_2|ENC_LITTLE_ENDIAN;
size_t l;
try_bom = tvb_get_ntohs(tvb, 0);
if (try_bom == 0xFEFF) {
enc = ENC_UTF_16|ENC_BIG_ENDIAN;
}
else if(try_bom == 0xFFFE) {
enc = ENC_UTF_16|ENC_LITTLE_ENDIAN;
}
data_str = tvb_get_string_enc(pinfo->pool, tvb, 0, tvb_captured_length(tvb), enc);
l = strlen(data_str);
unicode_tvb = tvb_new_child_real_data(tvb, data_str, (guint)l, (gint)l);
if (tvbparse_peek(tvbparse_init(unicode_tvb, 0, -1, NULL, want_ignore), want_heur)) {
add_new_data_source(pinfo, unicode_tvb, "UTF8");
dissect_xml(unicode_tvb, pinfo, tree, data);
return TRUE;
}
}
return FALSE;
}
xml_frame_t *xml_get_tag(xml_frame_t *frame, const gchar *name)
{
xml_frame_t *tag = NULL;
xml_frame_t *xml_item = frame->first_child;
while (xml_item) {
if (xml_item->type == XML_FRAME_TAG) {
if (!name) { /* get the 1st tag */
tag = xml_item;
break;
} else if (xml_item->name_orig_case && !strcmp(xml_item->name_orig_case, name)) {
tag = xml_item;
break;
}
}
xml_item = xml_item->next_sibling;
}
return tag;
}
xml_frame_t *xml_get_attrib(xml_frame_t *frame, const gchar *name)
{
xml_frame_t *attr = NULL;
xml_frame_t *xml_item = frame->first_child;
while (xml_item) {
if ((xml_item->type == XML_FRAME_ATTRIB) &&
xml_item->name_orig_case && !strcmp(xml_item->name_orig_case, name)) {
attr = xml_item;
break;
}
xml_item = xml_item->next_sibling;
}
return attr;
}
xml_frame_t *xml_get_cdata(xml_frame_t *frame)
{
xml_frame_t *cdata = NULL;
xml_frame_t *xml_item = frame->first_child;
while (xml_item) {
if (xml_item->type == XML_FRAME_CDATA) {
cdata = xml_item;
break;
}
xml_item = xml_item->next_sibling;
}
return cdata;
}
static void after_token(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
int hfid;
gboolean is_cdata = FALSE;
proto_item *pi;
xml_frame_t *new_frame;
if (tok->id == XML_CDATA) {
hfid = current_frame->ns ? current_frame->ns->hf_cdata : xml_ns.hf_cdata;
is_cdata = TRUE;
} else if ( tok->id > 0) {
hfid = tok->id;
} else {
hfid = xml_ns.hf_cdata;
}
pi = proto_tree_add_item(current_frame->tree, hfid, tok->tvb, tok->offset, tok->len, ENC_UTF_8|ENC_NA);
proto_item_set_text(pi, "%s",
tvb_format_text(tok->tvb, tok->offset, tok->len));
if (is_cdata) {
new_frame = wmem_new(wmem_packet_scope(), xml_frame_t);
new_frame->type = XML_FRAME_CDATA;
new_frame->name = NULL;
new_frame->name_orig_case = NULL;
new_frame->value = tvb_new_subset_length(tok->tvb, tok->offset, tok->len);
insert_xml_frame(current_frame, new_frame);
new_frame->item = pi;
new_frame->last_item = pi;
new_frame->tree = NULL;
new_frame->start_offset = tok->offset;
new_frame->length = tok->len;
new_frame->ns = NULL;
new_frame->pinfo = current_frame->pinfo;
}
}
static void before_xmpli(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_item *pi;
proto_tree *pt;
tvbparse_elem_t *name_tok = tok->sub->next;
gchar *name = tvb_get_string_enc(wmem_packet_scope(), name_tok->tvb, name_tok->offset, name_tok->len, ENC_ASCII);
xml_ns_t *ns = (xml_ns_t *)wmem_map_lookup(xmpli_names, name);
xml_frame_t *new_frame;
int hf_tag;
gint ett;
ascii_strdown_inplace(name);
if (!ns) {
hf_tag = hf_xmlpi;
ett = ett_xmpli;
} else {
hf_tag = ns->hf_tag;
ett = ns->ett;
}
pi = proto_tree_add_item(current_frame->tree, hf_tag, tok->tvb, tok->offset, tok->len, ENC_UTF_8|ENC_NA);
proto_item_set_text(pi, "%s", tvb_format_text(tok->tvb, tok->offset, (name_tok->offset - tok->offset) + name_tok->len));
pt = proto_item_add_subtree(pi, ett);
new_frame = wmem_new(wmem_packet_scope(), xml_frame_t);
new_frame->type = XML_FRAME_XMPLI;
new_frame->name = name;
new_frame->name_orig_case = name;
new_frame->value = NULL;
insert_xml_frame(current_frame, new_frame);
new_frame->item = pi;
new_frame->last_item = pi;
new_frame->tree = pt;
new_frame->start_offset = tok->offset;
new_frame->length = tok->len;
new_frame->ns = ns;
new_frame->pinfo = current_frame->pinfo;
g_ptr_array_add(stack, new_frame);
}
static void after_xmlpi(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_tree_add_format_text(current_frame->tree, tok->tvb, tok->offset, tok->len);
if (stack->len > 1) {
g_ptr_array_remove_index_fast(stack, stack->len - 1);
} else {
proto_tree_add_expert(current_frame->tree, current_frame->pinfo, &ei_xml_closing_unopened_xmpli_tag,
tok->tvb, tok->offset, tok->len);
}
}
static void before_tag(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
tvbparse_elem_t *name_tok = tok->sub->next;
gchar *root_name;
gchar *name = NULL, *name_orig_case = NULL;
xml_ns_t *ns;
xml_frame_t *new_frame;
proto_item *pi;
proto_tree *pt;
if (name_tok->sub->id == XML_SCOPED_NAME) {
tvbparse_elem_t *root_tok = name_tok->sub->sub;
tvbparse_elem_t *leaf_tok = name_tok->sub->sub->next->next;
xml_ns_t *nameroot_ns;
root_name = (gchar *)tvb_get_string_enc(wmem_packet_scope(), root_tok->tvb, root_tok->offset, root_tok->len, ENC_ASCII);
name = (gchar *)tvb_get_string_enc(wmem_packet_scope(), leaf_tok->tvb, leaf_tok->offset, leaf_tok->len, ENC_ASCII);
name_orig_case = name;
nameroot_ns = (xml_ns_t *)wmem_map_lookup(xml_ns.elements, root_name);
if(nameroot_ns) {
ns = (xml_ns_t *)wmem_map_lookup(nameroot_ns->elements, name);
if (!ns) {
ns = &unknown_ns;
}
} else {
ns = &unknown_ns;
}
} else {
name = tvb_get_string_enc(wmem_packet_scope(), name_tok->tvb, name_tok->offset, name_tok->len, ENC_ASCII);
name_orig_case = wmem_strdup(wmem_packet_scope(), name);
ascii_strdown_inplace(name);
if(current_frame->ns) {
ns = (xml_ns_t *)wmem_map_lookup(current_frame->ns->elements, name);
if (!ns) {
if (! ( ns = (xml_ns_t *)wmem_map_lookup(root_ns->elements, name) ) ) {
ns = &unknown_ns;
}
}
} else {
ns = &unknown_ns;
}
}
pi = proto_tree_add_item(current_frame->tree, ns->hf_tag, tok->tvb, tok->offset, tok->len, ENC_UTF_8|ENC_NA);
proto_item_set_text(pi, "%s", tvb_format_text(tok->tvb,
tok->offset,
(name_tok->offset - tok->offset) + name_tok->len));
pt = proto_item_add_subtree(pi, ns->ett);
new_frame = wmem_new(wmem_packet_scope(), xml_frame_t);
new_frame->type = XML_FRAME_TAG;
new_frame->name = name;
new_frame->name_orig_case = name_orig_case;
new_frame->value = NULL;
insert_xml_frame(current_frame, new_frame);
new_frame->item = pi;
new_frame->last_item = pi;
new_frame->tree = pt;
new_frame->start_offset = tok->offset;
new_frame->length = tok->len;
new_frame->ns = ns;
new_frame->pinfo = current_frame->pinfo;
g_ptr_array_add(stack, new_frame);
}
static void after_open_tag(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok _U_)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_item_append_text(current_frame->last_item, ">");
}
static void after_closed_tag(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_item_append_text(current_frame->last_item, "/>");
if (stack->len > 1) {
g_ptr_array_remove_index_fast(stack, stack->len - 1);
} else {
proto_tree_add_expert(current_frame->tree, current_frame->pinfo, &ei_xml_closing_unopened_tag,
tok->tvb, tok->offset, tok->len);
}
}
static void after_untag(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_item_set_len(current_frame->item, (tok->offset - current_frame->start_offset) + tok->len);
current_frame->length = (tok->offset - current_frame->start_offset) + tok->len;
proto_tree_add_format_text(current_frame->tree, tok->tvb, tok->offset, tok->len);
if (stack->len > 1) {
g_ptr_array_remove_index_fast(stack, stack->len - 1);
} else {
proto_tree_add_expert(current_frame->tree, current_frame->pinfo, &ei_xml_closing_unopened_tag,
tok->tvb, tok->offset, tok->len);
}
}
static void before_dtd_doctype(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
xml_frame_t *new_frame;
tvbparse_elem_t *name_tok = tok->sub->next->next->next->sub->sub;
proto_tree *dtd_item = proto_tree_add_item(current_frame->tree, hf_doctype,
name_tok->tvb, name_tok->offset,
name_tok->len, ENC_ASCII|ENC_NA);
proto_item_set_text(dtd_item, "%s", tvb_format_text(tok->tvb, tok->offset, tok->len));
new_frame = wmem_new(wmem_packet_scope(), xml_frame_t);
new_frame->type = XML_FRAME_DTD_DOCTYPE;
new_frame->name = (gchar *)tvb_get_string_enc(wmem_packet_scope(), name_tok->tvb,
name_tok->offset,
name_tok->len, ENC_ASCII);
new_frame->name_orig_case = new_frame->name;
new_frame->value = NULL;
insert_xml_frame(current_frame, new_frame);
new_frame->item = dtd_item;
new_frame->last_item = dtd_item;
new_frame->tree = proto_item_add_subtree(dtd_item, ett_dtd);
new_frame->start_offset = tok->offset;
new_frame->length = tok->len;
new_frame->ns = NULL;
new_frame->pinfo = current_frame->pinfo;
g_ptr_array_add(stack, new_frame);
}
static void pop_stack(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok _U_)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
if (stack->len > 1) {
g_ptr_array_remove_index_fast(stack, stack->len - 1);
} else {
proto_tree_add_expert(current_frame->tree, current_frame->pinfo, &ei_xml_closing_unopened_tag,
tok->tvb, tok->offset, tok->len);
}
}
static void after_dtd_close(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_tree_add_format_text(current_frame->tree, tok->tvb, tok->offset, tok->len);
if (stack->len > 1) {
g_ptr_array_remove_index_fast(stack, stack->len - 1);
} else {
proto_tree_add_expert(current_frame->tree, current_frame->pinfo, &ei_xml_closing_unopened_tag,
tok->tvb, tok->offset, tok->len);
}
}
static void get_attrib_value(void *tvbparse_data _U_, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
tok->data = tok->sub;
}
static void after_attrib(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
gchar *name, *name_orig_case;
tvbparse_elem_t *value;
tvbparse_elem_t *value_part = (tvbparse_elem_t *)tok->sub->next->next->data;
int *hfidp;
int hfid;
proto_item *pi;
xml_frame_t *new_frame;
name = tvb_get_string_enc(wmem_packet_scope(), tok->sub->tvb, tok->sub->offset, tok->sub->len, ENC_ASCII);
name_orig_case = wmem_strdup(wmem_packet_scope(), name);
ascii_strdown_inplace(name);
if(current_frame->ns && (hfidp = (int *)wmem_map_lookup(current_frame->ns->attributes, name) )) {
hfid = *hfidp;
value = value_part;
} else {
hfid = hf_unknowwn_attrib;
value = tok;
}
pi = proto_tree_add_item(current_frame->tree, hfid, value->tvb, value->offset, value->len, ENC_UTF_8|ENC_NA);
proto_item_set_text(pi, "%s", tvb_format_text(tok->tvb, tok->offset, tok->len));
current_frame->last_item = pi;
new_frame = wmem_new(wmem_packet_scope(), xml_frame_t);
new_frame->type = XML_FRAME_ATTRIB;
new_frame->name = name;
new_frame->name_orig_case = name_orig_case;
new_frame->value = tvb_new_subset_length(value_part->tvb, value_part->offset,
value_part->len);
insert_xml_frame(current_frame, new_frame);
new_frame->item = pi;
new_frame->last_item = pi;
new_frame->tree = NULL;
new_frame->start_offset = tok->offset;
new_frame->length = tok->len;
new_frame->ns = NULL;
new_frame->pinfo = current_frame->pinfo;
}
static void unrecognized_token(void *tvbparse_data, const void *wanted_data _U_, tvbparse_elem_t *tok _U_)
{
GPtrArray *stack = (GPtrArray *)tvbparse_data;
xml_frame_t *current_frame = (xml_frame_t *)g_ptr_array_index(stack, stack->len - 1);
proto_tree_add_expert(current_frame->tree, current_frame->pinfo, &ei_xml_unrecognized_text,
tok->tvb, tok->offset, tok->len);
}
static void init_xml_parser(void)
{
tvbparse_wanted_t *want_name =
tvbparse_chars(-1, 1, 0,
"abcdefghijklmnopqrstuvwxyz.-_ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",
NULL, NULL, NULL);
tvbparse_wanted_t *want_attr_name =
tvbparse_chars(-1, 1, 0,
"abcdefghijklmnopqrstuvwxyz.-_ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789:",
NULL, NULL, NULL);
tvbparse_wanted_t *want_scoped_name = tvbparse_set_seq(XML_SCOPED_NAME, NULL, NULL, NULL,
want_name,
tvbparse_char(-1, ":", NULL, NULL, NULL),
want_name,
NULL);
tvbparse_wanted_t *want_tag_name = tvbparse_set_oneof(0, NULL, NULL, NULL,
want_scoped_name,
want_name,
NULL);
tvbparse_wanted_t *want_attrib_value = tvbparse_set_oneof(0, NULL, NULL, get_attrib_value,
tvbparse_quoted(-1, NULL, NULL, tvbparse_shrink_token_cb, '\"', '\\'),
tvbparse_quoted(-1, NULL, NULL, tvbparse_shrink_token_cb, '\'', '\\'),
tvbparse_chars(-1, 1, 0, "0123456789", NULL, NULL, NULL),
want_name,
NULL);
tvbparse_wanted_t *want_attributes = tvbparse_one_or_more(-1, NULL, NULL, NULL,
tvbparse_set_seq(-1, NULL, NULL, after_attrib,
want_attr_name,
tvbparse_char(-1, "=", NULL, NULL, NULL),
want_attrib_value,
NULL));
tvbparse_wanted_t *want_stoptag = tvbparse_set_oneof(-1, NULL, NULL, NULL,
tvbparse_char(-1, ">", NULL, NULL, after_open_tag),
tvbparse_string(-1, "/>", NULL, NULL, after_closed_tag),
NULL);
tvbparse_wanted_t *want_stopxmlpi = tvbparse_string(-1, "?>", NULL, NULL, after_xmlpi);
tvbparse_wanted_t *want_comment = tvbparse_set_seq(hf_comment, NULL, NULL, after_token,
tvbparse_string(-1, "<!--", NULL, NULL, NULL),
tvbparse_until(-1, NULL, NULL, NULL,
tvbparse_string(-1, "-->", NULL, NULL, NULL),
TP_UNTIL_INCLUDE),
NULL);
tvbparse_wanted_t *want_cdatasection = tvbparse_set_seq(hf_cdatasection, NULL, NULL, after_token,
tvbparse_string(-1, "<![CDATA[", NULL, NULL, NULL),
tvbparse_until(-1, NULL, NULL, NULL,
tvbparse_string(-1, "]]>", NULL, NULL, NULL),
TP_UNTIL_INCLUDE),
NULL);
tvbparse_wanted_t *want_xmlpi = tvbparse_set_seq(hf_xmlpi, NULL, before_xmpli, NULL,
tvbparse_string(-1, "<?", NULL, NULL, NULL),
want_name,
tvbparse_set_oneof(-1, NULL, NULL, NULL,
want_stopxmlpi,
tvbparse_set_seq(-1, NULL, NULL, NULL,
want_attributes,
want_stopxmlpi,
NULL),
NULL),
NULL);
tvbparse_wanted_t *want_closing_tag = tvbparse_set_seq(0, NULL, NULL, after_untag,
tvbparse_char(-1, "<", NULL, NULL, NULL),
tvbparse_char(-1, "/", NULL, NULL, NULL),
want_tag_name,
tvbparse_char(-1, ">", NULL, NULL, NULL),
NULL);
tvbparse_wanted_t *want_doctype_start = tvbparse_set_seq(-1, NULL, before_dtd_doctype, NULL,
tvbparse_char(-1, "<", NULL, NULL, NULL),
tvbparse_char(-1, "!", NULL, NULL, NULL),
tvbparse_casestring(-1, "DOCTYPE", NULL, NULL, NULL),
tvbparse_set_oneof(-1, NULL, NULL, NULL,
tvbparse_set_seq(-1, NULL, NULL, NULL,
want_name,
tvbparse_char(-1, "[", NULL, NULL, NULL),
NULL),
tvbparse_set_seq(-1, NULL, NULL, pop_stack,
want_name,
tvbparse_set_oneof(-1, NULL, NULL, NULL,
tvbparse_casestring(-1, "PUBLIC", NULL, NULL, NULL),
tvbparse_casestring(-1, "SYSTEM", NULL, NULL, NULL),
NULL),
tvbparse_until(-1, NULL, NULL, NULL,
tvbparse_char(-1, ">", NULL, NULL, NULL),
TP_UNTIL_INCLUDE),
NULL),
NULL),
NULL);
tvbparse_wanted_t *want_dtd_tag = tvbparse_set_seq(hf_dtd_tag, NULL, NULL, after_token,
tvbparse_char(-1, "<", NULL, NULL, NULL),
tvbparse_char(-1, "!", NULL, NULL, NULL),
tvbparse_until(-1, NULL, NULL, NULL,
tvbparse_char(-1, ">", NULL, NULL, NULL),
TP_UNTIL_INCLUDE),
NULL);
tvbparse_wanted_t *want_tag = tvbparse_set_seq(-1, NULL, before_tag, NULL,
tvbparse_char(-1, "<", NULL, NULL, NULL),
want_tag_name,
tvbparse_set_oneof(-1, NULL, NULL, NULL,
tvbparse_set_seq(-1, NULL, NULL, NULL,
want_attributes,
want_stoptag,
NULL),
want_stoptag,
NULL),
NULL);
tvbparse_wanted_t *want_dtd_close = tvbparse_set_seq(-1, NULL, NULL, after_dtd_close,
tvbparse_char(-1, "]", NULL, NULL, NULL),
tvbparse_char(-1, ">", NULL, NULL, NULL),
NULL);
want_ignore = tvbparse_chars(-1, 1, 0, " \t\r\n", NULL, NULL, NULL);
want = tvbparse_set_oneof(-1, NULL, NULL, NULL,
want_comment,
want_cdatasection,
want_xmlpi,
want_closing_tag,
want_doctype_start,
want_dtd_close,
want_dtd_tag,
want_tag,
tvbparse_not_chars(XML_CDATA, 1, 0, "<", NULL, NULL, after_token),
tvbparse_not_chars(-1, 1, 0, " \t\r\n", NULL, NULL, unrecognized_token),
NULL);
want_heur = tvbparse_set_oneof(-1, NULL, NULL, NULL,
want_comment,
want_cdatasection,
want_xmlpi,
want_doctype_start,
want_dtd_tag,
want_tag,
NULL);
}
static xml_ns_t *xml_new_namespace(wmem_map_t *hash, const gchar *name, ...)
{
xml_ns_t *ns = wmem_new(wmem_epan_scope(), xml_ns_t);
va_list ap;
gchar *attr_name;
ns->name = wmem_strdup(wmem_epan_scope(), name);
ns->hf_tag = -1;
ns->hf_cdata = -1;
ns->ett = -1;
ns->attributes = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
ns->elements = NULL;
va_start(ap, name);
while(( attr_name = va_arg(ap, gchar *) )) {
int *hfp = wmem_new(wmem_epan_scope(), int);
*hfp = -1;
wmem_map_insert(ns->attributes, wmem_strdup(wmem_epan_scope(), attr_name), hfp);
};
va_end(ap);
wmem_map_insert(hash, ns->name, ns);
return ns;
}
static void add_xml_field(wmem_array_t *hfs, int *p_id, const gchar *name, const gchar *fqn)
{
hf_register_info hfri;
hfri.p_id = p_id;
hfri.hfinfo.name = name;
hfri.hfinfo.abbrev = fqn;
hfri.hfinfo.type = FT_STRING;
hfri.hfinfo.display = BASE_NONE;
hfri.hfinfo.strings = NULL;
hfri.hfinfo.bitmask = 0x0;
hfri.hfinfo.blurb = NULL;
HFILL_INIT(hfri);
wmem_array_append_one(hfs, hfri);
}
static void add_xml_attribute_names(gpointer k, gpointer v, gpointer p)
{
struct _attr_reg_data *d = (struct _attr_reg_data *)p;
const gchar *basename = wmem_strconcat(wmem_epan_scope(), d->basename, ".", (gchar *)k, NULL);
add_xml_field(d->hf, (int*) v, (gchar *)k, basename);
}
static void add_xmlpi_namespace(gpointer k _U_, gpointer v, gpointer p)
{
xml_ns_t *ns = (xml_ns_t *)v;
const gchar *basename = wmem_strconcat(wmem_epan_scope(), (gchar *)p, ".", ns->name, NULL);
gint *ett_p = &(ns->ett);
struct _attr_reg_data d;
add_xml_field(hf_arr, &(ns->hf_tag), basename, basename);
g_array_append_val(ett_arr, ett_p);
d.basename = basename;
d.hf = hf_arr;
wmem_map_foreach(ns->attributes, add_xml_attribute_names, &d);
}
static void destroy_dtd_data(dtd_build_data_t *dtd_data)
{
g_free(dtd_data->proto_name);
g_free(dtd_data->media_type);
g_free(dtd_data->description);
g_free(dtd_data->proto_root);
g_string_free(dtd_data->error, TRUE);
while(dtd_data->elements->len) {
dtd_named_list_t *nl = (dtd_named_list_t *)g_ptr_array_remove_index_fast(dtd_data->elements, 0);
g_ptr_array_free(nl->list, TRUE);
g_free(nl->name);
g_free(nl);
}
g_ptr_array_free(dtd_data->elements, TRUE);
while(dtd_data->attributes->len) {
dtd_named_list_t *nl = (dtd_named_list_t *)g_ptr_array_remove_index_fast(dtd_data->attributes, 0);
g_ptr_array_free(nl->list, TRUE);
g_free(nl->name);
g_free(nl);
}
g_ptr_array_free(dtd_data->attributes, TRUE);
g_free(dtd_data);
}
static void copy_attrib_item(gpointer k, gpointer v _U_, gpointer p)
{
gchar *key = (gchar *)wmem_strdup(wmem_epan_scope(), (const gchar *)k);
int *value = wmem_new(wmem_epan_scope(), int);
wmem_map_t *dst = (wmem_map_t *)p;
*value = -1;
wmem_map_insert(dst, key, value);
}
static wmem_map_t *copy_attributes_hash(wmem_map_t *src)
{
wmem_map_t *dst = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
wmem_map_foreach(src, copy_attrib_item, dst);
return dst;
}
static xml_ns_t *duplicate_element(xml_ns_t *orig)
{
xml_ns_t *new_item = wmem_new(wmem_epan_scope(), xml_ns_t);
guint i;
new_item->name = wmem_strdup(wmem_epan_scope(), orig->name);
new_item->hf_tag = -1;
new_item->hf_cdata = -1;
new_item->ett = -1;
new_item->attributes = copy_attributes_hash(orig->attributes);
new_item->elements = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
new_item->element_names = g_ptr_array_new();
for(i=0; i < orig->element_names->len; i++) {
g_ptr_array_add(new_item->element_names,
g_ptr_array_index(orig->element_names, i));
}
return new_item;
}
static gchar *fully_qualified_name(GPtrArray *hier, gchar *name, gchar *proto_name)
{
guint i;
wmem_strbuf_t *s = wmem_strbuf_new(wmem_epan_scope(), proto_name);
wmem_strbuf_append(s, ".");
for (i = 1; i < hier->len; i++) {
wmem_strbuf_append_printf(s, "%s.", (gchar *)g_ptr_array_index(hier, i));
}
wmem_strbuf_append(s, name);
return wmem_strbuf_finalize(s);;
}
static xml_ns_t *make_xml_hier(gchar *elem_name,
xml_ns_t *root,
wmem_map_t *elements,
GPtrArray *hier,
GString *error,
wmem_array_t *hfs,
GArray *etts,
char *proto_name)
{
xml_ns_t *fresh;
xml_ns_t *orig;
gchar *fqn;
gint *ett_p;
gboolean recurred = FALSE;
guint i;
struct _attr_reg_data d;
if ( g_str_equal(elem_name, root->name) ) {
return NULL;
}
if (! ( orig = (xml_ns_t *)wmem_map_lookup(elements, elem_name) )) {
g_string_append_printf(error, "element '%s' is not defined\n", elem_name);
return NULL;
}
for (i = 0; i < hier->len; i++) {
if( (elem_name) && (strcmp(elem_name, (gchar *) g_ptr_array_index(hier, i) ) == 0 )) {
recurred = TRUE;
}
}
if (recurred) {
return NULL;
}
fqn = fully_qualified_name(hier, elem_name, proto_name);
fresh = duplicate_element(orig);
fresh->fqn = fqn;
add_xml_field(hfs, &(fresh->hf_tag), wmem_strdup(wmem_epan_scope(), elem_name), fqn);
add_xml_field(hfs, &(fresh->hf_cdata), wmem_strdup(wmem_epan_scope(), elem_name), fqn);
ett_p = &fresh->ett;
g_array_append_val(etts, ett_p);
d.basename = fqn;
d.hf = hfs;
wmem_map_foreach(fresh->attributes, add_xml_attribute_names, &d);
while(fresh->element_names->len) {
gchar *child_name = (gchar *)g_ptr_array_remove_index(fresh->element_names, 0);
xml_ns_t *child_element = NULL;
g_ptr_array_add(hier, elem_name);
child_element = make_xml_hier(child_name, root, elements, hier, error, hfs, etts, proto_name);
g_ptr_array_remove_index_fast(hier, hier->len - 1);
if (child_element) {
wmem_map_insert(fresh->elements, child_element->name, child_element);
}
}
g_ptr_array_free(fresh->element_names, TRUE);
fresh->element_names = NULL;
return fresh;
}
static void free_elements(gpointer k _U_, gpointer v, gpointer p _U_)
{
xml_ns_t *e = (xml_ns_t *)v;
while (e->element_names->len) {
g_free(g_ptr_array_remove_index(e->element_names, 0));
}
g_ptr_array_free(e->element_names, TRUE);
}
static void register_dtd(dtd_build_data_t *dtd_data, GString *errors)
{
wmem_map_t *elements = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
gchar *root_name = NULL;
xml_ns_t *root_element = NULL;
wmem_array_t *hfs;
GArray *etts;
GPtrArray *hier;
gchar *curr_name;
GPtrArray *element_names = g_ptr_array_new();
/* we first populate elements with the those coming from the parser */
while(dtd_data->elements->len) {
dtd_named_list_t *nl = (dtd_named_list_t *)g_ptr_array_remove_index(dtd_data->elements, 0);
xml_ns_t *element = wmem_new(wmem_epan_scope(), xml_ns_t);
/* we will use the first element found as root in case no other one was given. */
if (root_name == NULL)
root_name = wmem_strdup(wmem_epan_scope(), nl->name);
element->name = wmem_strdup(wmem_epan_scope(), nl->name);
element->element_names = nl->list;
element->hf_tag = -1;
element->hf_cdata = -1;
element->ett = -1;
element->attributes = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
element->elements = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
if( wmem_map_lookup(elements, element->name) ) {
g_string_append_printf(errors, "element %s defined more than once\n", element->name);
free_elements(NULL, element, NULL);
} else {
wmem_map_insert(elements, element->name, element);
g_ptr_array_add(element_names, wmem_strdup(wmem_epan_scope(), element->name));
}
g_free(nl->name);
g_free(nl);
}
/* then we add the attributes to its relative elements */
while(dtd_data->attributes->len) {
dtd_named_list_t *nl = (dtd_named_list_t *)g_ptr_array_remove_index(dtd_data->attributes, 0);
xml_ns_t *element = (xml_ns_t *)wmem_map_lookup(elements, nl->name);
if (element) {
while(nl->list->len) {
gchar *name = (gchar *)g_ptr_array_remove_index(nl->list, 0);
int *id_p = wmem_new(wmem_epan_scope(), int);
*id_p = -1;
wmem_map_insert(element->attributes, wmem_strdup(wmem_epan_scope(), name), id_p);
g_free(name); }
}
else {
g_string_append_printf(errors, "element %s is not defined\n", nl->name);
}
g_free(nl->name);
g_ptr_array_free(nl->list, TRUE);
g_free(nl);
}
/* if a proto_root is defined in the dtd we'll use that as root */
if( dtd_data->proto_root ) {
wmem_free(wmem_epan_scope(), root_name);
root_name = wmem_strdup(wmem_epan_scope(), dtd_data->proto_root);
}
/* we use a stack with the names to avoid recurring infinitelly */
hier = g_ptr_array_new();
/*
* if a proto name was given in the dtd the dtd will be used as a protocol
* or else the dtd will be loaded as a branch of the xml namespace
*/
if( ! dtd_data->proto_name ) {
hfs = hf_arr;
etts = ett_arr;
g_ptr_array_add(hier, wmem_strdup(wmem_epan_scope(), "xml"));
} else {
/*
* if we were given a proto_name the namespace will be registered
* as an independent protocol with its own hf and ett arrays.
*/
hfs = wmem_array_new(wmem_epan_scope(), sizeof(hf_register_info));
etts = g_array_new(FALSE, FALSE, sizeof(gint *));
}
/* the root element of the dtd's namespace */
root_element = wmem_new(wmem_epan_scope(), xml_ns_t);
root_element->name = wmem_strdup(wmem_epan_scope(), root_name);
root_element->fqn = dtd_data->proto_name ? wmem_strdup(wmem_epan_scope(), dtd_data->proto_name) : root_element->name;
root_element->hf_tag = -1;
root_element->hf_cdata = -1;
root_element->ett = -1;
root_element->elements = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
root_element->element_names = element_names;
/*
* we can either create a namespace as a flat namespace
* in which all the elements are at the root level
* or we can create a recursive namespace
*/
if (dtd_data->recursion) {
xml_ns_t *orig_root;
make_xml_hier(root_name, root_element, elements, hier, errors, hfs, etts, dtd_data->proto_name);
wmem_map_insert(root_element->elements, (gpointer)root_element->name, root_element);
orig_root = (xml_ns_t *)wmem_map_lookup(elements, root_name);
/* if the root element was defined copy its attrlist to the child */
if(orig_root) {
struct _attr_reg_data d;
d.basename = dtd_data->proto_name;
d.hf = hfs;
root_element->attributes = copy_attributes_hash(orig_root->attributes);
wmem_map_foreach(root_element->attributes, add_xml_attribute_names, &d);
} else {
root_element->attributes = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
}
/* we then create all the sub hierarchies to catch the recurred cases */
g_ptr_array_add(hier, root_name);
while(root_element->element_names->len) {
curr_name = (gchar *)g_ptr_array_remove_index(root_element->element_names, 0);
if( ! wmem_map_lookup(root_element->elements, curr_name) ) {
xml_ns_t *fresh = make_xml_hier(curr_name, root_element, elements, hier, errors,
hfs, etts, dtd_data->proto_name);
wmem_map_insert(root_element->elements, (gpointer)fresh->name, fresh);
}
}
} else {
/* a flat namespace */
g_ptr_array_add(hier, root_name);
root_element->attributes = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
while(root_element->element_names->len) {
xml_ns_t *fresh;
gint *ett_p;
struct _attr_reg_data d;
curr_name = (gchar *)g_ptr_array_remove_index(root_element->element_names, 0);
fresh = duplicate_element((xml_ns_t *)wmem_map_lookup(elements, curr_name));
fresh->fqn = fully_qualified_name(hier, curr_name, root_name);
add_xml_field(hfs, &(fresh->hf_tag), curr_name, fresh->fqn);
add_xml_field(hfs, &(fresh->hf_cdata), curr_name, fresh->fqn);
d.basename = fresh->fqn;
d.hf = hfs;
wmem_map_foreach(fresh->attributes, add_xml_attribute_names, &d);
ett_p = &fresh->ett;
g_array_append_val(etts, ett_p);
g_ptr_array_free(fresh->element_names, TRUE);
wmem_map_insert(root_element->elements, (gpointer)fresh->name, fresh);
}
}
g_ptr_array_free(element_names, TRUE);
g_ptr_array_free(hier, TRUE);
/*
* if we were given a proto_name the namespace will be registered
* as an independent protocol.
*/
if( dtd_data->proto_name ) {
gint *ett_p;
gchar *full_name, *short_name;
if (dtd_data->description) {
full_name = wmem_strdup(wmem_epan_scope(), dtd_data->description);
} else {
full_name = wmem_strdup(wmem_epan_scope(), root_name);
}
short_name = wmem_strdup(wmem_epan_scope(), dtd_data->proto_name);
ett_p = &root_element->ett;
g_array_append_val(etts, ett_p);
add_xml_field(hfs, &root_element->hf_cdata, root_element->name, root_element->fqn);
root_element->hf_tag = proto_register_protocol(full_name, short_name, short_name);
proto_register_field_array(root_element->hf_tag, (hf_register_info*)wmem_array_get_raw(hfs), wmem_array_get_count(hfs));
proto_register_subtree_array((gint **)g_array_data(etts), etts->len);
if (dtd_data->media_type) {
gchar* media_type = wmem_strdup(wmem_epan_scope(), dtd_data->media_type);
wmem_map_insert(media_types, media_type, root_element);
}
g_array_free(etts, TRUE);
}
wmem_map_insert(xml_ns.elements, root_element->name, root_element);
wmem_map_foreach(elements, free_elements, NULL);
destroy_dtd_data(dtd_data);
wmem_free(wmem_epan_scope(), root_name);
}
# define DIRECTORY_T GDir
# define FILE_T gchar
# define OPENDIR_OP(name) g_dir_open(name, 0, dummy)
# define DIRGETNEXT_OP(dir) g_dir_read_name(dir)
# define GETFNAME_OP(file) (file);
# define CLOSEDIR_OP(dir) g_dir_close(dir)
static void init_xml_names(void)
{
guint i;
DIRECTORY_T *dir;
const FILE_T *file;
const gchar *filename;
gchar *dirname;
GError **dummy = wmem_new(wmem_epan_scope(), GError *);
*dummy = NULL;
xmpli_names = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
media_types = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
unknown_ns.elements = xml_ns.elements = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
unknown_ns.attributes = xml_ns.attributes = wmem_map_new(wmem_epan_scope(), g_str_hash, g_str_equal);
xml_new_namespace(xmpli_names, "xml", "version", "encoding", "standalone", NULL);
dirname = get_persconffile_path("dtds", FALSE);
if (test_for_directory(dirname) != EISDIR) {
/* Although dir isn't a directory it may still use memory */
g_free(dirname);
dirname = get_datafile_path("dtds");
}
if (test_for_directory(dirname) == EISDIR) {
if ((dir = OPENDIR_OP(dirname)) != NULL) {
GString *errors = g_string_new("");
while ((file = DIRGETNEXT_OP(dir)) != NULL) {
guint namelen;
filename = GETFNAME_OP(file);
namelen = (int)strlen(filename);
if ( namelen > 4 && ( g_ascii_strcasecmp(filename+(namelen-4), ".dtd") == 0 ) ) {
GString *preparsed;
dtd_build_data_t *dtd_data;
g_string_truncate(errors, 0);
preparsed = dtd_preparse(dirname, filename, errors);
if (errors->len) {
report_failure("Dtd Preparser in file %s%c%s: %s",
dirname, G_DIR_SEPARATOR, filename, errors->str);
continue;
}
dtd_data = dtd_parse(preparsed);
g_string_free(preparsed, TRUE);
if (dtd_data->error->len) {
report_failure("Dtd Parser in file %s%c%s: %s",
dirname, G_DIR_SEPARATOR, filename, dtd_data->error->str);
destroy_dtd_data(dtd_data);
continue;
}
register_dtd(dtd_data, errors);
if (errors->len) {
report_failure("Dtd Registration in file: %s%c%s: %s",
dirname, G_DIR_SEPARATOR, filename, errors->str);
continue;
}
}
}
g_string_free(errors, TRUE);
CLOSEDIR_OP(dir);
}
}
g_free(dirname);
for(i=0;i<array_length(default_media_types);i++) {
if( ! wmem_map_lookup(media_types, default_media_types[i]) ) {
wmem_map_insert(media_types, (gpointer)default_media_types[i], &xml_ns);
}
}
wmem_map_foreach(xmpli_names, add_xmlpi_namespace, (gpointer)"xml.xmlpi");
wmem_free(wmem_epan_scope(), dummy);
}
void
proto_register_xml(void)
{
static gint *ett_base[] = {
&unknown_ns.ett,
&xml_ns.ett,
&ett_dtd,
&ett_xmpli
};
static hf_register_info hf_base[] = {
{ &hf_xmlpi,
{"XMLPI", "xml.xmlpi",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_cdatasection,
{"CDATASection", "xml.cdatasection",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_comment,
{"Comment", "xml.comment",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_unknowwn_attrib,
{"Attribute", "xml.attribute",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_doctype,
{"Doctype", "xml.doctype",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &hf_dtd_tag,
{"DTD Tag", "xml.dtdtag",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &unknown_ns.hf_cdata,
{"CDATA", "xml.cdata",
FT_STRING, BASE_NONE, NULL, 0, NULL,
HFILL }
},
{ &unknown_ns.hf_tag,
{"Tag", "xml.tag",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
},
{ &xml_ns.hf_cdata,
{"Unknown", "xml.unknown",
FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }
}
};
static ei_register_info ei[] = {
{ &ei_xml_closing_unopened_tag, { "xml.closing_unopened_tag", PI_MALFORMED, PI_ERROR, "Closing an unopened tag", EXPFILL }},
{ &ei_xml_closing_unopened_xmpli_tag, { "xml.closing_unopened_xmpli_tag", PI_MALFORMED, PI_ERROR, "Closing an unopened xmpli tag", EXPFILL }},
{ &ei_xml_unrecognized_text, { "xml.unrecognized_text", PI_PROTOCOL, PI_WARN, "Unrecognized text", EXPFILL }},
};
module_t *xml_module;
expert_module_t* expert_xml;
hf_arr = wmem_array_new(wmem_epan_scope(), sizeof(hf_register_info));
ett_arr = g_array_new(FALSE, FALSE, sizeof(gint *));
wmem_array_append(hf_arr, hf_base, array_length(hf_base));
g_array_append_vals(ett_arr, ett_base, array_length(ett_base));
init_xml_names();
xml_ns.hf_tag = proto_register_protocol("eXtensible Markup Language", "XML", xml_ns.name);
proto_register_field_array(xml_ns.hf_tag, (hf_register_info*)wmem_array_get_raw(hf_arr), wmem_array_get_count(hf_arr));
proto_register_subtree_array((gint **)g_array_data(ett_arr), ett_arr->len);
expert_xml = expert_register_protocol(xml_ns.hf_tag);
expert_register_field_array(expert_xml, ei, array_length(ei));
xml_module = prefs_register_protocol(xml_ns.hf_tag, NULL);
prefs_register_obsolete_preference(xml_module, "heuristic");
prefs_register_obsolete_preference(xml_module, "heuristic_tcp");
prefs_register_obsolete_preference(xml_module, "heuristic_udp");
/* XXX - UCS-2, or UTF-16? */
prefs_register_bool_preference(xml_module, "heuristic_unicode", "Use Unicode in heuristics",
"Try to recognize XML encoded in Unicode (UCS-2BE)",
&pref_heuristic_unicode);
g_array_free(ett_arr, TRUE);
xml_handle = register_dissector("xml", dissect_xml, xml_ns.hf_tag);
init_xml_parser();
}
static void
add_dissector_media(gpointer k, gpointer v _U_, gpointer p _U_)
{
dissector_add_string("media_type", (gchar *)k, xml_handle);
}
void
proto_reg_handoff_xml(void)
{
wmem_map_foreach(media_types, add_dissector_media, NULL);
dissector_add_uint_range_with_preference("tcp.port", "", xml_handle);
heur_dissector_add("http", dissect_xml_heur, "XML in HTTP", "xml_http", xml_ns.hf_tag, HEURISTIC_DISABLE);
heur_dissector_add("sip", dissect_xml_heur, "XML in SIP", "xml_sip", xml_ns.hf_tag, HEURISTIC_DISABLE);
heur_dissector_add("media", dissect_xml_heur, "XML in media", "xml_media", xml_ns.hf_tag, HEURISTIC_DISABLE);
heur_dissector_add("tcp", dissect_xml_heur, "XML over TCP", "xml_tcp", xml_ns.hf_tag, HEURISTIC_DISABLE);
heur_dissector_add("udp", dissect_xml_heur, "XML over UDP", "xml_udp", xml_ns.hf_tag, HEURISTIC_DISABLE);
heur_dissector_add("wtap_file", dissect_xml_heur, "XML file", "xml_wtap", xml_ns.hf_tag, HEURISTIC_ENABLE);
dissector_add_uint("acdr.tls_application", TLS_APP_XML, xml_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:
*/
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