Sweden-Number/dlls/wsdapi/soap.c

732 lines
22 KiB
C

/*
* Web Services on Devices
*
* Copyright 2017-2018 Owen Rudge for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <limits.h>
#define COBJMACROS
#include "wsdapi_internal.h"
#include "wine/debug.h"
#include "wine/heap.h"
#include "webservices.h"
WINE_DEFAULT_DEBUG_CHANNEL(wsdapi);
#define APP_MAX_DELAY 500
static const WCHAR discoveryTo[] = {
'u','r','n',':',
's','c','h','e','m','a','s','-','x','m','l','s','o','a','p','-','o','r','g',':',
'w','s',':','2','0','0','5',':','0','4',':',
'd','i','s','c','o','v','e','r','y', 0 };
static const WCHAR actionHello[] = {
'h','t','t','p',':','/','/',
's','c','h','e','m','a','s','.','x','m','l','s','o','a','p','.','o','r','g','/',
'w','s','/','2','0','0','5','/','0','4','/',
'd','i','s','c','o','v','e','r','y','/',
'H','e','l','l','o', 0 };
static const WCHAR addressingNsUri[] = {
'h','t','t','p',':','/','/',
's','c','h','e','m','a','s','.','x','m','l','s','o','a','p','.','o','r','g','/',
'w','s','/','2','0','0','4','/','0','8','/','a','d','d','r','e','s','s','i','n','g', 0 };
static const WCHAR discoveryNsUri[] = {
'h','t','t','p',':','/','/',
's','c','h','e','m','a','s','.','x','m','l','s','o','a','p','.','o','r','g','/',
'w','s','/','2','0','0','5','/','0','4','/','d','i','s','c','o','v','e','r','y', 0 };
static const WCHAR envelopeNsUri[] = {
'h','t','t','p',':','/','/',
'w','w','w','.','w','3','.','o','r','g','/',
'2','0','0','3','/','0','5','/','s','o','a','p','-','e','n','v','e','l','o','p','e', 0 };
static const WCHAR addressingPrefix[] = { 'w','s','a', 0 };
static const WCHAR discoveryPrefix[] = { 'w','s','d', 0 };
static const WCHAR envelopePrefix[] = { 's','o','a','p', 0 };
static const WCHAR headerString[] = { 'H','e','a','d','e','r', 0 };
static const WCHAR actionString[] = { 'A','c','t','i','o','n', 0 };
static const WCHAR messageIdString[] = { 'M','e','s','s','a','g','e','I','D', 0 };
static const WCHAR toString[] = { 'T','o', 0 };
static const WCHAR relatesToString[] = { 'R','e','l','a','t','e','s','T','o', 0 };
static const WCHAR appSequenceString[] = { 'A','p','p','S','e','q','u','e','n','c','e', 0 };
static const WCHAR instanceIdString[] = { 'I','n','s','t','a','n','c','e','I','d', 0 };
static const WCHAR messageNumberString[] = { 'M','e','s','s','a','g','e','N','u','m','b','e','r', 0 };
static const WCHAR sequenceIdString[] = { 'S','e','q','u','e','n','c','e','I','d', 0 };
static const WCHAR emptyString[] = { 0 };
struct discovered_namespace
{
struct list entry;
LPCWSTR prefix;
LPCWSTR uri;
};
static char *wide_to_utf8(LPCWSTR wide_string, int *length)
{
char *new_string = NULL;
if (wide_string == NULL)
return NULL;
*length = WideCharToMultiByte(CP_UTF8, 0, wide_string, -1, NULL, 0, NULL, NULL);
if (*length < 0)
return NULL;
new_string = heap_alloc(*length);
WideCharToMultiByte(CP_UTF8, 0, wide_string, -1, new_string, *length, NULL, NULL);
return new_string;
}
static WS_XML_STRING *populate_xml_string(LPCWSTR str)
{
WS_XML_STRING *xml = heap_alloc_zero(sizeof(WS_XML_STRING));
int utf8Length;
if (xml == NULL)
return NULL;
xml->bytes = (BYTE *)wide_to_utf8(str, &utf8Length);
if (xml->bytes == NULL)
{
heap_free(xml);
return NULL;
}
xml->dictionary = NULL;
xml->id = 0;
xml->length = (xml->bytes == NULL) ? 0 : (utf8Length - 1);
return xml;
}
static inline void free_xml_string(WS_XML_STRING *value)
{
if (value == NULL)
return;
if (value->bytes != NULL)
heap_free(value->bytes);
heap_free(value);
}
static HRESULT write_xml_attribute(WSDXML_ATTRIBUTE *attribute, WS_XML_WRITER *writer)
{
WS_XML_STRING *local_name = NULL, *element_ns = NULL, *ns_prefix = NULL;
WS_XML_UTF16_TEXT utf16_text;
HRESULT ret = E_OUTOFMEMORY;
int text_len;
if (attribute == NULL)
return S_OK;
/* Start the attribute */
local_name = populate_xml_string(attribute->Name->LocalName);
if (local_name == NULL) goto cleanup;
if (attribute->Name->Space == NULL)
{
element_ns = populate_xml_string(emptyString);
if (element_ns == NULL) goto cleanup;
ns_prefix = NULL;
}
else
{
element_ns = populate_xml_string(attribute->Name->Space->Uri);
if (element_ns == NULL) goto cleanup;
ns_prefix = populate_xml_string(attribute->Name->Space->PreferredPrefix);
if (ns_prefix == NULL) goto cleanup;
}
ret = WsWriteStartAttribute(writer, ns_prefix, local_name, element_ns, FALSE, NULL);
if (FAILED(ret)) goto cleanup;
text_len = lstrlenW(attribute->Value);
utf16_text.text.textType = WS_XML_TEXT_TYPE_UTF16;
utf16_text.bytes = (BYTE *)attribute->Value;
utf16_text.byteCount = min(WSD_MAX_TEXT_LENGTH, text_len) * sizeof(WCHAR);
ret = WsWriteText(writer, (WS_XML_TEXT *)&utf16_text, NULL);
if (FAILED(ret)) goto cleanup;
ret = WsWriteEndAttribute(writer, NULL);
if (FAILED(ret)) goto cleanup;
cleanup:
free_xml_string(local_name);
free_xml_string(element_ns);
free_xml_string(ns_prefix);
return ret;
}
static HRESULT write_xml_element(WSDXML_ELEMENT *element, WS_XML_WRITER *writer)
{
WS_XML_STRING *local_name = NULL, *element_ns = NULL, *ns_prefix = NULL;
WSDXML_ATTRIBUTE *current_attribute;
WS_XML_UTF16_TEXT utf16_text;
WSDXML_NODE *current_child;
WSDXML_TEXT *node_as_text;
int text_len;
HRESULT ret = E_OUTOFMEMORY;
if (element == NULL)
return S_OK;
/* Start the element */
local_name = populate_xml_string(element->Name->LocalName);
if (local_name == NULL) goto cleanup;
element_ns = populate_xml_string(element->Name->Space->Uri);
if (element_ns == NULL) goto cleanup;
ns_prefix = populate_xml_string(element->Name->Space->PreferredPrefix);
if (ns_prefix == NULL) goto cleanup;
ret = WsWriteStartElement(writer, ns_prefix, local_name, element_ns, NULL);
if (FAILED(ret)) goto cleanup;
/* Write attributes */
current_attribute = element->FirstAttribute;
while (current_attribute != NULL)
{
ret = write_xml_attribute(current_attribute, writer);
if (FAILED(ret)) goto cleanup;
current_attribute = current_attribute->Next;
}
/* Write child elements */
current_child = element->FirstChild;
while (current_child != NULL)
{
if (current_child->Type == ElementType)
{
ret = write_xml_element((WSDXML_ELEMENT *)current_child, writer);
if (FAILED(ret)) goto cleanup;
}
else if (current_child->Type == TextType)
{
node_as_text = (WSDXML_TEXT *)current_child;
text_len = lstrlenW(node_as_text->Text);
utf16_text.text.textType = WS_XML_TEXT_TYPE_UTF16;
utf16_text.byteCount = min(WSD_MAX_TEXT_LENGTH, text_len) * sizeof(WCHAR);
utf16_text.bytes = (BYTE *)node_as_text->Text;
ret = WsWriteText(writer, (WS_XML_TEXT *)&utf16_text, NULL);
if (FAILED(ret)) goto cleanup;
}
current_child = current_child->Next;
}
/* End the element */
ret = WsWriteEndElement(writer, NULL);
cleanup:
free_xml_string(local_name);
free_xml_string(element_ns);
free_xml_string(ns_prefix);
return ret;
}
static WSDXML_ELEMENT *add_child_element(IWSDXMLContext *xml_context, WSDXML_ELEMENT *parent, LPCWSTR ns_uri,
LPCWSTR name, LPCWSTR text)
{
WSDXML_ELEMENT *element_obj;
WSDXML_NAME *name_obj;
if (FAILED(IWSDXMLContext_AddNameToNamespace(xml_context, ns_uri, name, &name_obj)))
return NULL;
if (FAILED(WSDXMLBuildAnyForSingleElement(name_obj, text, &element_obj)))
{
WSDFreeLinkedMemory(name_obj);
return NULL;
}
WSDFreeLinkedMemory(name_obj);
/* Add the element as a child - this will link the element's memory allocation to the parent's */
if (FAILED(WSDXMLAddChild(parent, element_obj)))
{
WSDFreeLinkedMemory(element_obj);
return NULL;
}
return element_obj;
}
static BOOL create_guid(LPWSTR buffer)
{
const WCHAR formatString[] = { 'u','r','n',':','u','u','i','d',':','%','s', 0 };
WCHAR* uuidString = NULL;
UUID uuid;
if (UuidCreate(&uuid) != RPC_S_OK)
return FALSE;
UuidToStringW(&uuid, (RPC_WSTR*)&uuidString);
if (uuidString == NULL)
return FALSE;
wsprintfW(buffer, formatString, uuidString);
RpcStringFreeW((RPC_WSTR*)&uuidString);
return TRUE;
}
static void populate_soap_header(WSD_SOAP_HEADER *header, LPCWSTR to, LPCWSTR action, LPCWSTR message_id,
WSD_APP_SEQUENCE *sequence, const WSDXML_ELEMENT *any_headers)
{
ZeroMemory(header, sizeof(WSD_SOAP_HEADER));
header->To = to;
header->Action = action;
header->MessageID = message_id;
header->AppSequence = sequence;
header->AnyHeaders = (WSDXML_ELEMENT *)any_headers;
/* TODO: Implement RelatesTo, ReplyTo, From, FaultTo */
}
#define MAX_ULONGLONG_STRING_SIZE 25
static LPWSTR ulonglong_to_string(void *parent, ULONGLONG value)
{
WCHAR formatString[] = { '%','I','6','4','u', 0 };
LPWSTR ret;
ret = WSDAllocateLinkedMemory(parent, MAX_ULONGLONG_STRING_SIZE * sizeof(WCHAR));
if (ret == NULL)
return NULL;
wsprintfW(ret, formatString, value);
return ret;
}
static WSDXML_ATTRIBUTE *add_attribute(IWSDXMLContext *xml_context, WSDXML_ELEMENT *parent, LPCWSTR ns_uri, LPCWSTR name)
{
WSDXML_ATTRIBUTE *attribute, *cur_attrib;
WSDXML_NAME *name_obj = NULL;
if (ns_uri == NULL)
{
name_obj = WSDAllocateLinkedMemory(NULL, sizeof(WSDXML_NAME));
name_obj->LocalName = duplicate_string(name_obj, name);
name_obj->Space = NULL;
}
else
{
if (FAILED(IWSDXMLContext_AddNameToNamespace(xml_context, ns_uri, name, &name_obj)))
return NULL;
}
attribute = WSDAllocateLinkedMemory(parent, sizeof(WSDXML_ATTRIBUTE));
if (attribute == NULL)
{
WSDFreeLinkedMemory(name_obj);
return NULL;
}
attribute->Element = parent;
attribute->Name = name_obj;
attribute->Next = NULL;
attribute->Value = NULL;
if (name_obj != NULL)
WSDAttachLinkedMemory(attribute, name_obj);
if (parent->FirstAttribute == NULL)
{
/* Make this the first attribute of the parent */
parent->FirstAttribute = attribute;
}
else
{
/* Find the last attribute and add this as the next one */
cur_attrib = parent->FirstAttribute;
while (cur_attrib->Next != NULL)
{
cur_attrib = cur_attrib->Next;
}
cur_attrib->Next = attribute;
}
return attribute;
}
static void remove_attribute(WSDXML_ELEMENT *parent, WSDXML_ATTRIBUTE *attribute)
{
WSDXML_ATTRIBUTE *cur_attrib;
/* Find the last attribute and add this as the next one */
cur_attrib = parent->FirstAttribute;
if (cur_attrib == attribute)
parent->FirstAttribute = cur_attrib->Next;
else
{
while (cur_attrib != NULL)
{
/* Is our attribute the next attribute? */
if (cur_attrib->Next == attribute)
{
/* Remove it from the list */
cur_attrib->Next = attribute->Next;
break;
}
cur_attrib = cur_attrib->Next;
}
}
WSDFreeLinkedMemory(attribute);
}
static BOOL add_ulonglong_attribute(IWSDXMLContext *xml_context, WSDXML_ELEMENT *parent, LPCWSTR ns_uri, LPCWSTR name,
ULONGLONG value)
{
WSDXML_ATTRIBUTE *attribute = add_attribute(xml_context, parent, ns_uri, name);
if (attribute == NULL)
return FALSE;
attribute->Value = ulonglong_to_string(attribute, value);
if (attribute->Value == NULL)
{
remove_attribute(parent, attribute);
return FALSE;
}
return TRUE;
}
static BOOL add_string_attribute(IWSDXMLContext *xml_context, WSDXML_ELEMENT *parent, LPCWSTR ns_uri, LPCWSTR name,
LPCWSTR value)
{
WSDXML_ATTRIBUTE *attribute = add_attribute(xml_context, parent, ns_uri, name);
if (attribute == NULL)
return FALSE;
attribute->Value = duplicate_string(attribute, value);
if (attribute->Value == NULL)
{
remove_attribute(parent, attribute);
return FALSE;
}
return TRUE;
}
static BOOL add_discovered_namespace(struct list *namespaces, WSDXML_NAMESPACE *discovered_ns)
{
struct discovered_namespace *ns;
LIST_FOR_EACH_ENTRY(ns, namespaces, struct discovered_namespace, entry)
{
if (lstrcmpW(ns->uri, discovered_ns->Uri) == 0)
return TRUE; /* Already added */
}
ns = WSDAllocateLinkedMemory(namespaces, sizeof(struct discovered_namespace));
if (ns == NULL)
return FALSE;
ns->prefix = duplicate_string(ns, discovered_ns->PreferredPrefix);
ns->uri = duplicate_string(ns, discovered_ns->Uri);
if ((ns->prefix == NULL) || (ns->uri == NULL))
return FALSE;
list_add_tail(namespaces, &ns->entry);
return TRUE;
}
static WSDXML_ELEMENT *create_soap_header_xml_elements(IWSDXMLContext *xml_context, WSD_SOAP_HEADER *header)
{
WSDXML_ELEMENT *header_element = NULL, *app_sequence_element = NULL;
WSDXML_NAME *header_name = NULL;
/* <s:Header> */
if (FAILED(IWSDXMLContext_AddNameToNamespace(xml_context, envelopeNsUri, headerString, &header_name))) goto cleanup;
if (FAILED(WSDXMLBuildAnyForSingleElement(header_name, NULL, &header_element))) goto cleanup;
WSDFreeLinkedMemory(header_name);
/* <a:Action> */
if (add_child_element(xml_context, header_element, addressingNsUri, actionString, header->Action) == NULL)
goto cleanup;
/* <a:MessageId> */
if (add_child_element(xml_context, header_element, addressingNsUri, messageIdString, header->MessageID) == NULL)
goto cleanup;
/* <a:To> */
if (add_child_element(xml_context, header_element, addressingNsUri, toString, header->To) == NULL)
goto cleanup;
/* <a:RelatesTo> */
if (header->RelatesTo.MessageID != NULL)
{
if (add_child_element(xml_context, header_element, addressingNsUri, relatesToString,
header->RelatesTo.MessageID) == NULL) goto cleanup;
}
/* <d:AppSequence> */
app_sequence_element = add_child_element(xml_context, header_element, discoveryNsUri, appSequenceString, emptyString);
if (app_sequence_element == NULL) goto cleanup;
/* InstanceId attribute */
if (!add_ulonglong_attribute(xml_context, app_sequence_element, NULL, instanceIdString, min(UINT_MAX,
header->AppSequence->InstanceId))) goto cleanup;
/* SequenceID attribute */
if (header->AppSequence->SequenceId != NULL)
{
if (!add_string_attribute(xml_context, app_sequence_element, NULL, sequenceIdString, header->AppSequence->SequenceId))
goto cleanup;
}
/* MessageNumber attribute */
if (!add_ulonglong_attribute(xml_context, app_sequence_element, NULL, messageNumberString, min(UINT_MAX,
header->AppSequence->MessageNumber))) goto cleanup;
/* </d:AppSequence> */
/* TODO: Write any headers */
/* </s:Header> */
return header_element;
cleanup:
if (header_name != NULL) WSDFreeLinkedMemory(header_name);
WSDXMLCleanupElement(header_element);
return NULL;
}
static HRESULT create_soap_envelope(IWSDXMLContext *xml_context, WSD_SOAP_HEADER *header, WSDXML_ELEMENT *body_element,
WS_HEAP **heap, char **output_xml, ULONG *xml_length, struct list *discovered_namespaces)
{
WS_XML_STRING *actual_envelope_prefix = NULL, *envelope_uri_xmlstr = NULL, *tmp_prefix = NULL, *tmp_uri = NULL;
WSDXML_NAMESPACE *addressing_ns = NULL, *discovery_ns = NULL, *envelope_ns = NULL;
WSDXML_ELEMENT *header_element = NULL;
struct discovered_namespace *ns;
WS_XML_BUFFER *buffer = NULL;
WS_XML_WRITER *writer = NULL;
WS_XML_STRING envelope;
HRESULT ret = E_OUTOFMEMORY;
static BYTE envelopeString[] = "Envelope";
/* Create the necessary XML prefixes */
if (FAILED(IWSDXMLContext_AddNamespace(xml_context, addressingNsUri, addressingPrefix, &addressing_ns))) goto cleanup;
if (!add_discovered_namespace(discovered_namespaces, addressing_ns)) goto cleanup;
if (FAILED(IWSDXMLContext_AddNamespace(xml_context, discoveryNsUri, discoveryPrefix, &discovery_ns))) goto cleanup;
if (!add_discovered_namespace(discovered_namespaces, discovery_ns)) goto cleanup;
if (FAILED(IWSDXMLContext_AddNamespace(xml_context, envelopeNsUri, envelopePrefix, &envelope_ns))) goto cleanup;
if (!add_discovered_namespace(discovered_namespaces, envelope_ns)) goto cleanup;
envelope.bytes = envelopeString;
envelope.length = sizeof(envelopeString) - 1;
envelope.dictionary = NULL;
envelope.id = 0;
actual_envelope_prefix = populate_xml_string(envelope_ns->PreferredPrefix);
envelope_uri_xmlstr = populate_xml_string(envelope_ns->Uri);
if ((actual_envelope_prefix == NULL) || (envelope_uri_xmlstr == NULL)) goto cleanup;
/* Now try to create the appropriate WebServices buffers, etc */
ret = WsCreateHeap(16384, 4096, NULL, 0, heap, NULL);
if (FAILED(ret)) goto cleanup;
ret = WsCreateXmlBuffer(*heap, NULL, 0, &buffer, NULL);
if (FAILED(ret)) goto cleanup;
ret = WsCreateWriter(NULL, 0, &writer, NULL);
if (FAILED(ret)) goto cleanup;
ret = WsSetOutputToBuffer(writer, buffer, NULL, 0, NULL);
if (FAILED(ret)) goto cleanup;
/* Create the header XML elements */
header_element = create_soap_header_xml_elements(xml_context, header);
if (header_element == NULL) goto cleanup;
/* <s:Envelope> */
ret = WsWriteStartElement(writer, actual_envelope_prefix, &envelope, envelope_uri_xmlstr, NULL);
if (FAILED(ret)) goto cleanup;
LIST_FOR_EACH_ENTRY(ns, discovered_namespaces, struct discovered_namespace, entry)
{
tmp_prefix = populate_xml_string(ns->prefix);
tmp_uri = populate_xml_string(ns->uri);
if ((tmp_prefix == NULL) || (tmp_uri == NULL)) goto cleanup;
ret = WsWriteXmlnsAttribute(writer, tmp_prefix, tmp_uri, FALSE, NULL);
if (FAILED(ret)) goto cleanup;
free_xml_string(tmp_prefix);
free_xml_string(tmp_uri);
}
tmp_prefix = NULL;
tmp_uri = NULL;
/* Write the header */
ret = write_xml_element(header_element, writer);
if (FAILED(ret)) goto cleanup;
ret = WsWriteEndElement(writer, NULL);
if (FAILED(ret)) goto cleanup;
/* </s:Envelope> */
/* Generate the bytes of the document */
ret = WsWriteXmlBufferToBytes(writer, buffer, NULL, NULL, 0, *heap, (void**)output_xml, xml_length, NULL);
if (FAILED(ret)) goto cleanup;
cleanup:
WSDFreeLinkedMemory(addressing_ns);
WSDFreeLinkedMemory(discovery_ns);
WSDFreeLinkedMemory(envelope_ns);
WSDXMLCleanupElement(header_element);
free_xml_string(actual_envelope_prefix);
free_xml_string(envelope_uri_xmlstr);
if (writer != NULL)
WsFreeWriter(writer);
/* Don't free the heap unless the operation has failed */
if ((FAILED(ret)) && (*heap != NULL))
{
WsFreeHeap(*heap);
*heap = NULL;
}
return ret;
}
static HRESULT write_and_send_message(IWSDiscoveryPublisherImpl *impl, WSD_SOAP_HEADER *header, WSDXML_ELEMENT *body_element,
struct list *discovered_namespaces, IWSDUdpAddress *remote_address, int max_initial_delay)
{
static const char xml_header[] = "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
ULONG xml_length = 0, xml_header_len = sizeof(xml_header) - 1;
WS_HEAP *heap = NULL;
char *xml = NULL;
char *full_xml;
HRESULT ret;
ret = create_soap_envelope(impl->xmlContext, header, NULL, &heap, &xml, &xml_length, discovered_namespaces);
if (ret != S_OK) return ret;
/* Prefix the XML header */
full_xml = heap_alloc(xml_length + xml_header_len + 1);
if (full_xml == NULL)
{
WsFreeHeap(heap);
return E_OUTOFMEMORY;
}
memcpy(full_xml, xml_header, xml_header_len);
memcpy(full_xml + xml_header_len, xml, xml_length);
full_xml[xml_length + xml_header_len] = 0;
if (remote_address == NULL)
{
/* Send the message via UDP multicast */
ret = send_udp_multicast(impl, full_xml, xml_length + xml_header_len + 1, max_initial_delay) ? S_OK : E_FAIL;
}
else
{
/* TODO: Send the message via UDP unicast */
FIXME("TODO: Send the message via UDP unicast\n");
}
heap_free(full_xml);
WsFreeHeap(heap);
return ret;
}
HRESULT send_hello_message(IWSDiscoveryPublisherImpl *impl, LPCWSTR id, ULONGLONG metadata_ver, ULONGLONG instance_id,
ULONGLONG msg_num, LPCWSTR session_id, const WSD_NAME_LIST *types_list, const WSD_URI_LIST *scopes_list,
const WSD_URI_LIST *xaddrs_list, const WSDXML_ELEMENT *hdr_any, const WSDXML_ELEMENT *ref_param_any,
const WSDXML_ELEMENT *endpoint_ref_any, const WSDXML_ELEMENT *any)
{
struct list *discoveredNamespaces = NULL;
WSD_SOAP_HEADER soapHeader;
WSD_APP_SEQUENCE sequence;
WCHAR message_id[64];
HRESULT ret = E_OUTOFMEMORY;
sequence.InstanceId = instance_id;
sequence.MessageNumber = msg_num;
sequence.SequenceId = session_id;
if (!create_guid(message_id)) goto cleanup;
discoveredNamespaces = WSDAllocateLinkedMemory(NULL, sizeof(struct list));
if (!discoveredNamespaces) goto cleanup;
list_init(discoveredNamespaces);
populate_soap_header(&soapHeader, discoveryTo, actionHello, message_id, &sequence, hdr_any);
/* TODO: Populate message body */
/* Write and send the message */
ret = write_and_send_message(impl, &soapHeader, NULL, discoveredNamespaces, NULL, APP_MAX_DELAY);
cleanup:
WSDFreeLinkedMemory(discoveredNamespaces);
return ret;
}