1 /*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <algorithm>
29 #include <vector>
30 #include "talk/xmpp/constants.h"
31 #include "talk/xmpp/xmppengineimpl.h"
32 #include "webrtc/base/common.h"
33
34 namespace buzz {
35
36 class XmppIqEntry {
XmppIqEntry(const std::string & id,const std::string & to,XmppEngine * pxce,XmppIqHandler * iq_handler)37 XmppIqEntry(const std::string & id, const std::string & to,
38 XmppEngine * pxce, XmppIqHandler * iq_handler) :
39 id_(id),
40 to_(to),
41 engine_(pxce),
42 iq_handler_(iq_handler) {
43 }
44
45 private:
46 friend class XmppEngineImpl;
47
48 const std::string id_;
49 const std::string to_;
50 XmppEngine * const engine_;
51 XmppIqHandler * const iq_handler_;
52 };
53
54
55 XmppReturnStatus
SendIq(const XmlElement * element,XmppIqHandler * iq_handler,XmppIqCookie * cookie)56 XmppEngineImpl::SendIq(const XmlElement * element, XmppIqHandler * iq_handler,
57 XmppIqCookie* cookie) {
58 if (state_ == STATE_CLOSED)
59 return XMPP_RETURN_BADSTATE;
60 if (NULL == iq_handler)
61 return XMPP_RETURN_BADARGUMENT;
62 if (!element || element->Name() != QN_IQ)
63 return XMPP_RETURN_BADARGUMENT;
64
65 const std::string& type = element->Attr(QN_TYPE);
66 if (type != "get" && type != "set")
67 return XMPP_RETURN_BADARGUMENT;
68
69 if (!element->HasAttr(QN_ID))
70 return XMPP_RETURN_BADARGUMENT;
71 const std::string& id = element->Attr(QN_ID);
72
73 XmppIqEntry * iq_entry = new XmppIqEntry(id,
74 element->Attr(QN_TO),
75 this, iq_handler);
76 iq_entries_->push_back(iq_entry);
77 SendStanza(element);
78
79 if (cookie)
80 *cookie = iq_entry;
81
82 return XMPP_RETURN_OK;
83 }
84
85
86 XmppReturnStatus
RemoveIqHandler(XmppIqCookie cookie,XmppIqHandler ** iq_handler)87 XmppEngineImpl::RemoveIqHandler(XmppIqCookie cookie,
88 XmppIqHandler ** iq_handler) {
89
90 std::vector<XmppIqEntry*, std::allocator<XmppIqEntry*> >::iterator pos;
91
92 pos = std::find(iq_entries_->begin(),
93 iq_entries_->end(),
94 reinterpret_cast<XmppIqEntry*>(cookie));
95
96 if (pos == iq_entries_->end())
97 return XMPP_RETURN_BADARGUMENT;
98
99 XmppIqEntry* entry = *pos;
100 iq_entries_->erase(pos);
101 if (iq_handler)
102 *iq_handler = entry->iq_handler_;
103 delete entry;
104
105 return XMPP_RETURN_OK;
106 }
107
108 void
DeleteIqCookies()109 XmppEngineImpl::DeleteIqCookies() {
110 for (size_t i = 0; i < iq_entries_->size(); i += 1) {
111 XmppIqEntry * iq_entry_ = (*iq_entries_)[i];
112 (*iq_entries_)[i] = NULL;
113 delete iq_entry_;
114 }
115 iq_entries_->clear();
116 }
117
118 static void
AecImpl(XmlElement * error_element,const QName & name,const char * type,const char * code)119 AecImpl(XmlElement * error_element, const QName & name,
120 const char * type, const char * code) {
121 error_element->AddElement(new XmlElement(QN_ERROR));
122 error_element->AddAttr(QN_CODE, code, 1);
123 error_element->AddAttr(QN_TYPE, type, 1);
124 error_element->AddElement(new XmlElement(name, true), 1);
125 }
126
127
128 static void
AddErrorCode(XmlElement * error_element,XmppStanzaError code)129 AddErrorCode(XmlElement * error_element, XmppStanzaError code) {
130 switch (code) {
131 case XSE_BAD_REQUEST:
132 AecImpl(error_element, QN_STANZA_BAD_REQUEST, "modify", "400");
133 break;
134 case XSE_CONFLICT:
135 AecImpl(error_element, QN_STANZA_CONFLICT, "cancel", "409");
136 break;
137 case XSE_FEATURE_NOT_IMPLEMENTED:
138 AecImpl(error_element, QN_STANZA_FEATURE_NOT_IMPLEMENTED,
139 "cancel", "501");
140 break;
141 case XSE_FORBIDDEN:
142 AecImpl(error_element, QN_STANZA_FORBIDDEN, "auth", "403");
143 break;
144 case XSE_GONE:
145 AecImpl(error_element, QN_STANZA_GONE, "modify", "302");
146 break;
147 case XSE_INTERNAL_SERVER_ERROR:
148 AecImpl(error_element, QN_STANZA_INTERNAL_SERVER_ERROR, "wait", "500");
149 break;
150 case XSE_ITEM_NOT_FOUND:
151 AecImpl(error_element, QN_STANZA_ITEM_NOT_FOUND, "cancel", "404");
152 break;
153 case XSE_JID_MALFORMED:
154 AecImpl(error_element, QN_STANZA_JID_MALFORMED, "modify", "400");
155 break;
156 case XSE_NOT_ACCEPTABLE:
157 AecImpl(error_element, QN_STANZA_NOT_ACCEPTABLE, "cancel", "406");
158 break;
159 case XSE_NOT_ALLOWED:
160 AecImpl(error_element, QN_STANZA_NOT_ALLOWED, "cancel", "405");
161 break;
162 case XSE_PAYMENT_REQUIRED:
163 AecImpl(error_element, QN_STANZA_PAYMENT_REQUIRED, "auth", "402");
164 break;
165 case XSE_RECIPIENT_UNAVAILABLE:
166 AecImpl(error_element, QN_STANZA_RECIPIENT_UNAVAILABLE, "wait", "404");
167 break;
168 case XSE_REDIRECT:
169 AecImpl(error_element, QN_STANZA_REDIRECT, "modify", "302");
170 break;
171 case XSE_REGISTRATION_REQUIRED:
172 AecImpl(error_element, QN_STANZA_REGISTRATION_REQUIRED, "auth", "407");
173 break;
174 case XSE_SERVER_NOT_FOUND:
175 AecImpl(error_element, QN_STANZA_REMOTE_SERVER_NOT_FOUND,
176 "cancel", "404");
177 break;
178 case XSE_SERVER_TIMEOUT:
179 AecImpl(error_element, QN_STANZA_REMOTE_SERVER_TIMEOUT, "wait", "502");
180 break;
181 case XSE_RESOURCE_CONSTRAINT:
182 AecImpl(error_element, QN_STANZA_RESOURCE_CONSTRAINT, "wait", "500");
183 break;
184 case XSE_SERVICE_UNAVAILABLE:
185 AecImpl(error_element, QN_STANZA_SERVICE_UNAVAILABLE, "cancel", "503");
186 break;
187 case XSE_SUBSCRIPTION_REQUIRED:
188 AecImpl(error_element, QN_STANZA_SUBSCRIPTION_REQUIRED, "auth", "407");
189 break;
190 case XSE_UNDEFINED_CONDITION:
191 AecImpl(error_element, QN_STANZA_UNDEFINED_CONDITION, "wait", "500");
192 break;
193 case XSE_UNEXPECTED_REQUEST:
194 AecImpl(error_element, QN_STANZA_UNEXPECTED_REQUEST, "wait", "400");
195 break;
196 }
197 }
198
199
200 XmppReturnStatus
SendStanzaError(const XmlElement * element_original,XmppStanzaError code,const std::string & text)201 XmppEngineImpl::SendStanzaError(const XmlElement * element_original,
202 XmppStanzaError code,
203 const std::string & text) {
204
205 if (state_ == STATE_CLOSED)
206 return XMPP_RETURN_BADSTATE;
207
208 XmlElement error_element(element_original->Name());
209 error_element.AddAttr(QN_TYPE, "error");
210
211 // copy attrs, copy 'from' to 'to' and strip 'from'
212 for (const XmlAttr * attribute = element_original->FirstAttr();
213 attribute; attribute = attribute->NextAttr()) {
214 QName name = attribute->Name();
215 if (name == QN_TO)
216 continue; // no need to put a from attr. Server will stamp stanza
217 else if (name == QN_FROM)
218 name = QN_TO;
219 else if (name == QN_TYPE)
220 continue;
221 error_element.AddAttr(name, attribute->Value());
222 }
223
224 // copy children
225 for (const XmlChild * child = element_original->FirstChild();
226 child;
227 child = child->NextChild()) {
228 if (child->IsText()) {
229 error_element.AddText(child->AsText()->Text());
230 } else {
231 error_element.AddElement(new XmlElement(*(child->AsElement())));
232 }
233 }
234
235 // add error information
236 AddErrorCode(&error_element, code);
237 if (text != STR_EMPTY) {
238 XmlElement * text_element = new XmlElement(QN_STANZA_TEXT, true);
239 text_element->AddText(text);
240 error_element.AddElement(text_element);
241 }
242
243 SendStanza(&error_element);
244
245 return XMPP_RETURN_OK;
246 }
247
248
249 bool
HandleIqResponse(const XmlElement * element)250 XmppEngineImpl::HandleIqResponse(const XmlElement * element) {
251 if (iq_entries_->empty())
252 return false;
253 if (element->Name() != QN_IQ)
254 return false;
255 std::string type = element->Attr(QN_TYPE);
256 if (type != "result" && type != "error")
257 return false;
258 if (!element->HasAttr(QN_ID))
259 return false;
260 std::string id = element->Attr(QN_ID);
261 std::string from = element->Attr(QN_FROM);
262
263 for (std::vector<XmppIqEntry *>::iterator it = iq_entries_->begin();
264 it != iq_entries_->end(); it += 1) {
265 XmppIqEntry * iq_entry = *it;
266 if (iq_entry->id_ == id && iq_entry->to_ == from) {
267 iq_entries_->erase(it);
268 iq_entry->iq_handler_->IqResponse(iq_entry, element);
269 delete iq_entry;
270 return true;
271 }
272 }
273
274 return false;
275 }
276
277 }
278