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/*
* Copyright (C) 2013 Andreas Steffen
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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 General Public License
* for more details.
*/
#include "tnc_ifmap_soap_msg.h"
#include "tnc_ifmap_http.h"
#include <utils/debug.h>
#define SOAP_NS "http://www.w3.org/2003/05/soap-envelope"
typedef struct private_tnc_ifmap_soap_msg_t private_tnc_ifmap_soap_msg_t;
/**
* Private data of an tnc_ifmap_soap_msg_t object.
*/
struct private_tnc_ifmap_soap_msg_t {
/**
* Public tnc_ifmap_soap_msg_t interface.
*/
tnc_ifmap_soap_msg_t public;
/**
* HTTP POST request builder and response processing
*/
tnc_ifmap_http_t *http;
/**
* TLS socket
*/
tls_socket_t *tls;
/**
* XML Document
*/
xmlDocPtr doc;
};
/**
* Find a child node with a given name
*/
static xmlNodePtr find_child(xmlNodePtr parent, const xmlChar* name)
{
xmlNodePtr child;
child = parent->xmlChildrenNode;
while (child)
{
if (xmlStrcmp(child->name, name) == 0)
{
return child;
}
child = child->next;
}
DBG1(DBG_TNC, "child node \"%s\" not found", name);
return NULL;
}
METHOD(tnc_ifmap_soap_msg_t, post, bool,
private_tnc_ifmap_soap_msg_t *this, xmlNodePtr request, char *result_name,
xmlNodePtr *result)
{
xmlDocPtr doc;
xmlNodePtr env, body, cur, response;
xmlNsPtr ns;
xmlChar *xml_str, *errorCode, *errorString;
int xml_len, len, written;
chunk_t xml, http;
char buf[4096] = { 0 };
status_t status;
DBG2(DBG_TNC, "sending ifmap %s", request->name);
/* Generate XML Document containing SOAP Envelope */
doc = xmlNewDoc("1.0");
env =xmlNewNode(NULL, "Envelope");
ns = xmlNewNs(env, SOAP_NS, "env");
xmlSetNs(env, ns);
xmlDocSetRootElement(doc, env);
/* Add SOAP Body containing IF-MAP request */
body = xmlNewNode(ns, "Body");
xmlAddChild(body, request);
xmlAddChild(env, body);
/* Convert XML Document into a character string */
xmlDocDumpFormatMemory(doc, &xml_str, &xml_len, 1);
xmlFreeDoc(doc);
DBG3(DBG_TNC, "%.*s", xml_len, xml_str);
xml = chunk_create(xml_str, xml_len);
/* Send SOAP-XML request via HTTPS POST */
do
{
status = this->http->build(this->http, &xml, &http);
if (status == FAILED)
{
break;
}
written = this->tls->write(this->tls, http.ptr, http.len);
free(http.ptr);
if (written != http.len)
{
status = FAILED;
break;
}
}
while (status == NEED_MORE);
xmlFree(xml_str);
if (status != SUCCESS)
{
return FALSE;
}
/* Receive SOAP-XML response via [chunked] HTTPS */
xml = chunk_empty;
do
{
/* reduce size so the buffer is null-terminated */
len = this->tls->read(this->tls, buf, sizeof(buf)-1, TRUE);
if (len <= 0)
{
return FALSE;
}
http = chunk_create(buf, len);
status = this->http->process(this->http, &http, &xml);
if (status == FAILED)
{
free(xml.ptr);
return FALSE;
}
}
while (status == NEED_MORE);
DBG3(DBG_TNC, "parsing XML message %B", &xml);
this->doc = xmlParseMemory(xml.ptr, xml.len);
free(xml.ptr);
if (!this->doc)
{
DBG1(DBG_TNC, "failed to parse XML message");
return FALSE;
}
/* check out XML document */
cur = xmlDocGetRootElement(this->doc);
if (!cur)
{
DBG1(DBG_TNC, "empty XML message");
return FALSE;
}
/* get XML Document type is a SOAP Envelope */
if (xmlStrcmp(cur->name, "Envelope"))
{
DBG1(DBG_TNC, "XML message does not contain a SOAP Envelope");
return FALSE;
}
/* get SOAP Body */
cur = find_child(cur, "Body");
if (!cur)
{
return FALSE;
}
/* get IF-MAP response */
response = find_child(cur, "response");
if (!response)
{
return FALSE;
}
/* get IF-MAP result */
cur = find_child(response, result_name);
if (!cur)
{
cur = find_child(response, "errorResult");
if (cur)
{
DBG1(DBG_TNC, "received errorResult");
errorCode = xmlGetProp(cur, "errorCode");
if (errorCode)
{
DBG1(DBG_TNC, " %s", errorCode);
xmlFree(errorCode);
}
cur = find_child(cur, "errorString");
if (cur)
{
errorString = xmlNodeGetContent(cur);
if (errorString)
{
DBG1(DBG_TNC, " %s", errorString);
xmlFree(errorString);
}
}
}
return FALSE;
}
if (result)
{
*result = cur;
}
return TRUE;
}
METHOD(tnc_ifmap_soap_msg_t, destroy, void,
private_tnc_ifmap_soap_msg_t *this)
{
this->http->destroy(this->http);
if (this->doc)
{
xmlFreeDoc(this->doc);
}
free(this);
}
/**
* See header
*/
tnc_ifmap_soap_msg_t *tnc_ifmap_soap_msg_create(char *uri, chunk_t user_pass,
tls_socket_t *tls)
{
private_tnc_ifmap_soap_msg_t *this;
INIT(this,
.public = {
.post = _post,
.destroy = _destroy,
},
.http = tnc_ifmap_http_create(uri, user_pass),
.tls = tls,
);
return &this->public;
}
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