Repository navigation
Expand file tree
/
Copy pathICMPv4PacketImpl.cpp
More file actions
275 lines (219 loc) · 6.62 KB
/
Copy pathICMPv4PacketImpl.cpp
File metadata and controls
275 lines (219 loc) · 6.62 KB
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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
//
// ICMPv4PacketImpl.cpp
//
// $Id: //poco/svn/Net/src/ICMPv4PacketImpl.cpp#2 $
//
// Library: Net
// Package: ICMP
// Module: ICMPv4PacketImpl
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
#include "Poco/Net/ICMPv4PacketImpl.h"
#include "Poco/Net/NetException.h"
#include "Poco/Timestamp.h"
#include "Poco/Timespan.h"
#include "Poco/Process.h"
#include "Poco/NumberFormatter.h"
#include <sstream>
using Poco::InvalidArgumentException;
using Poco::Timestamp;
using Poco::Timespan;
using Poco::Process;
using Poco::NumberFormatter;
using Poco::UInt8;
using Poco::UInt16;
using Poco::Int32;
namespace Poco {
namespace Net {
const UInt8 ICMPv4PacketImpl::DESTINATION_UNREACHABLE_TYPE = 3;
const UInt8 ICMPv4PacketImpl::SOURCE_QUENCH_TYPE = 4;
const UInt8 ICMPv4PacketImpl::REDIRECT_MESSAGE_TYPE = 5;
const UInt8 ICMPv4PacketImpl::TIME_EXCEEDED_TYPE = 11;
const UInt8 ICMPv4PacketImpl::PARAMETER_PROBLEM_TYPE = 12;
const std::string ICMPv4PacketImpl::MESSAGE_TYPE[] =
{
"Echo Reply",
"ICMP 1",
"ICMP 2",
"Dest Unreachable",
"Source Quench",
"Redirect",
"ICMP 6",
"ICMP 7",
"Echo",
"ICMP 9",
"ICMP 10",
"Time Exceeded",
"Parameter Problem",
"Timestamp",
"Timestamp Reply",
"Info Request",
"Info Reply",
"Unknown type"
};
const std::string ICMPv4PacketImpl::DESTINATION_UNREACHABLE_CODE[] =
{
"Net unreachable",
"Host unreachable",
"Protocol unreachable",
"Port unreachable",
"Fragmentation needed and DF set",
"Source route failed",
"Unknown code"
};
const std::string ICMPv4PacketImpl::REDIRECT_MESSAGE_CODE[] =
{
"Redirect datagrams for the network",
"Redirect datagrams for the host",
"Redirect datagrams for the type of service and network",
"Redirect datagrams for the type of service and host",
"Unknown code"
};
const std::string ICMPv4PacketImpl::TIME_EXCEEDED_CODE[] =
{
"Time to live exceeded in transit",
"Fragment reassembly time exceeded",
"Unknown code"
};
const std::string ICMPv4PacketImpl::PARAMETER_PROBLEM_CODE[] =
{
"Pointer indicates the error",
"Unknown code"
};
ICMPv4PacketImpl::ICMPv4PacketImpl(int dataSize):
ICMPPacketImpl(dataSize)
{
initPacket();
}
ICMPv4PacketImpl::~ICMPv4PacketImpl()
{
}
int ICMPv4PacketImpl::packetSize() const
{
return getDataSize() + sizeof(Header);
}
void ICMPv4PacketImpl::initPacket()
{
if (_seq >= MAX_SEQ_VALUE) resetSequence();
Header* icp = (Header*) packet(false);
icp->type = ECHO_REQUEST;
icp->code = 0;
icp->checksum = 0;
icp->seq = ++_seq;
icp->id = static_cast<UInt16>(Process::id());
struct timeval* ptp = (struct timeval *) (icp + 1);
*ptp = time();
icp->checksum = checksum((UInt16*) icp, getDataSize() + sizeof(Header));
}
struct timeval ICMPv4PacketImpl::time(Poco::UInt8* buffer, int length) const
{
struct timeval tv;
if (0 == buffer || 0 == length)
{
Timespan value(Timestamp().epochMicroseconds());
tv.tv_sec = (long) value.totalSeconds();
tv.tv_usec = (long) value.useconds();
}
else
{
struct timeval* ptv = (struct timeval*) data(buffer, length);
if (ptv) tv = *ptv;
else throw InvalidArgumentException("Invalid packet.");
}
return tv;
}
ICMPv4PacketImpl::Header* ICMPv4PacketImpl::header(Poco::UInt8* buffer, int length) const
{
poco_check_ptr (buffer);
int offset = (buffer[0] & 0x0F) * 4;
if ((offset + sizeof(Header)) > length) return 0;
buffer += offset;
return (Header *) buffer;
}
Poco::UInt8* ICMPv4PacketImpl::data(Poco::UInt8* buffer, int length) const
{
return ((Poco::UInt8*) header(buffer, length)) + sizeof(Header);
}
bool ICMPv4PacketImpl::validReplyID(Poco::UInt8* buffer, int length) const
{
Header *icp = header(buffer, length);
return icp && (Process::id() == icp->id);
}
std::string ICMPv4PacketImpl::errorDescription(unsigned char* buffer, int length)
{
Header *icp = header(buffer, length);
if (!icp) return "Invalid header.";
if (ECHO_REPLY == icp->type) return std::string(); // not an error
UInt8 pointer = 0;
if (PARAMETER_PROBLEM == icp->type)
{
UInt8 mask = 0x00FF;
pointer = icp->id & mask;
}
MessageType type = static_cast<MessageType>(icp->type);
int code = icp->code;
std::ostringstream err;
switch (type)
{
case DESTINATION_UNREACHABLE_TYPE:
if (code >= NET_UNREACHABLE && code < DESTINATION_UNREACHABLE_UNKNOWN)
err << DESTINATION_UNREACHABLE_CODE[code];
else
err << DESTINATION_UNREACHABLE_CODE[DESTINATION_UNREACHABLE_UNKNOWN];
break;
case SOURCE_QUENCH_TYPE:
err << "Source quench";
break;
case REDIRECT_MESSAGE_TYPE:
if (code >= REDIRECT_NETWORK && code < REDIRECT_MESSAGE_UNKNOWN)
err << REDIRECT_MESSAGE_CODE[code];
else
err << REDIRECT_MESSAGE_CODE[REDIRECT_MESSAGE_UNKNOWN];
break;
case TIME_EXCEEDED_TYPE:
if (code >= TIME_TO_LIVE || code < TIME_EXCEEDED_UNKNOWN)
err << TIME_EXCEEDED_CODE[code];
else
err << TIME_EXCEEDED_CODE[TIME_EXCEEDED_UNKNOWN];
break;
case PARAMETER_PROBLEM_TYPE:
if (POINTER_INDICATES_THE_ERROR != code)
code = PARAMETER_PROBLEM_UNKNOWN;
err << PARAMETER_PROBLEM_CODE[code] << ": error in octet #" << pointer;
break;
default:
err << "Unknown type.";
break;
}
return err.str();
}
std::string ICMPv4PacketImpl::typeDescription(int typeId)
{
poco_assert (typeId >= ECHO_REPLY && typeId < MESSAGE_TYPE_LENGTH);
return MESSAGE_TYPE[typeId];
}
} } // namespace Poco::Net