1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/*
* Copyright (c) 2010-2016 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Disco/DiscoServiceWalker.h>
#include <boost/bind.hpp>
#include <Swiften/Base/Log.h>
namespace Swift {
DiscoServiceWalker::DiscoServiceWalker(const JID& service, IQRouter* iqRouter, size_t maxSteps) : service_(service), iqRouter_(iqRouter), maxSteps_(maxSteps), active_(false) {
}
void DiscoServiceWalker::beginWalk() {
SWIFT_LOG(debug) << "Starting walk to " << service_ << std::endl;
assert(!active_);
assert(servicesBeingSearched_.empty());
active_ = true;
walkNode(service_);
}
void DiscoServiceWalker::endWalk() {
if (active_) {
SWIFT_LOG(debug) << "Ending walk to " << service_ << std::endl;
for (auto&& request : pendingDiscoInfoRequests_) {
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoInfoResponse, this, _1, _2, request));
}
for (auto&& request : pendingDiscoItemsRequests_) {
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoItemsResponse, this, _1, _2, request));
}
active_ = false;
onWalkAborted();
}
}
void DiscoServiceWalker::walkNode(const JID& jid) {
SWIFT_LOG(debug) << "Walking node " << jid << std::endl;
servicesBeingSearched_.insert(jid);
searchedServices_.insert(jid);
GetDiscoInfoRequest::ref discoInfoRequest = GetDiscoInfoRequest::create(jid, iqRouter_);
discoInfoRequest->onResponse.connect(boost::bind(&DiscoServiceWalker::handleDiscoInfoResponse, this, _1, _2, discoInfoRequest));
pendingDiscoInfoRequests_.insert(discoInfoRequest);
discoInfoRequest->send();
}
void DiscoServiceWalker::handleDiscoInfoResponse(std::shared_ptr<DiscoInfo> info, ErrorPayload::ref error, GetDiscoInfoRequest::ref request) {
/* If we got canceled, don't do anything */
if (!active_) {
return;
}
SWIFT_LOG(debug) << "Disco info response from " << request->getReceiver() << std::endl;
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoInfoResponse, this, _1, _2, request));
pendingDiscoInfoRequests_.erase(request);
if (error) {
handleDiscoError(request->getReceiver(), error);
return;
}
bool couldContainServices = false;
for (const auto& identity : info->getIdentities()) {
if (identity.getCategory() == "server") {
couldContainServices = true;
}
}
bool completed = false;
if (couldContainServices) {
GetDiscoItemsRequest::ref discoItemsRequest = GetDiscoItemsRequest::create(request->getReceiver(), iqRouter_);
discoItemsRequest->onResponse.connect(boost::bind(&DiscoServiceWalker::handleDiscoItemsResponse, this, _1, _2, discoItemsRequest));
pendingDiscoItemsRequests_.insert(discoItemsRequest);
discoItemsRequest->send();
} else {
completed = true;
}
onServiceFound(request->getReceiver(), info);
if (completed) {
markNodeCompleted(request->getReceiver());
}
}
void DiscoServiceWalker::handleDiscoItemsResponse(std::shared_ptr<DiscoItems> items, ErrorPayload::ref error, GetDiscoItemsRequest::ref request) {
/* If we got canceled, don't do anything */
if (!active_) {
return;
}
SWIFT_LOG(debug) << "Received disco items from " << request->getReceiver() << std::endl;
request->onResponse.disconnect(boost::bind(&DiscoServiceWalker::handleDiscoItemsResponse, this, _1, _2, request));
pendingDiscoItemsRequests_.erase(request);
if (error) {
handleDiscoError(request->getReceiver(), error);
return;
}
for (auto&& item : items->getItems()) {
if (item.getNode().empty()) {
/* Don't look at noded items. It's possible that this will exclude some services,
* but I've never seen one in the wild, and it's an easy fix for not looping.
*/
if (std::find(searchedServices_.begin(), searchedServices_.end(), item.getJID()) == searchedServices_.end()) { /* Don't recurse infinitely */
SWIFT_LOG(debug) << "Received disco item " << item.getJID() << std::endl;
walkNode(item.getJID());
}
}
}
markNodeCompleted(request->getReceiver());
}
void DiscoServiceWalker::handleDiscoError(const JID& jid, ErrorPayload::ref /*error*/) {
SWIFT_LOG(debug) << "Disco error from " << jid << std::endl;
markNodeCompleted(jid);
}
void DiscoServiceWalker::markNodeCompleted(const JID& jid) {
SWIFT_LOG(debug) << "Node completed " << jid << std::endl;
servicesBeingSearched_.erase(jid);
/* All results are in */
if (servicesBeingSearched_.empty()) {
active_ = false;
onWalkComplete();
}
/* Check if we're on a rampage */
else if (searchedServices_.size() >= maxSteps_) {
active_ = false;
onWalkComplete();
}
}
}
|
Swift