summaryrefslogtreecommitdiff
path: root/base/inet.hh
blob: 10b782a6c8618e02d4502ed7d8c0d2aed1d17747 (plain)
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
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
/*
 * Copyright (c) 2002-2003 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __BASE_INET_HH__
#define __BASE_INET_HH__

#include <iosfwd>
#include <string>
#include <utility>
#include <vector>

#include "base/range.hh"
#include "dev/etherpkt.hh"
#include "sim/host.hh"

#include "dnet/os.h"
#include "dnet/eth.h"
#include "dnet/ip.h"
#include "dnet/ip6.h"
#include "dnet/addr.h"
#include "dnet/arp.h"
#include "dnet/icmp.h"
#include "dnet/tcp.h"
#include "dnet/udp.h"
#include "dnet/intf.h"
#include "dnet/route.h"
#include "dnet/fw.h"
#include "dnet/blob.h"
#include "dnet/rand.h"

namespace Net {

/*
 * Ethernet Stuff
 */
struct EthAddr : protected eth_addr
{
  protected:
    void parse(const std::string &addr);

  public:
    EthAddr();
    EthAddr(const uint8_t ea[ETH_ADDR_LEN]);
    EthAddr(const eth_addr &ea);
    EthAddr(const std::string &addr);
    const EthAddr &operator=(const eth_addr &ea);
    const EthAddr &operator=(const std::string &addr);

    int size() const { return sizeof(eth_addr); }

    const uint8_t *bytes() const { return &data[0]; }
    uint8_t *bytes() { return &data[0]; }

    const uint8_t *addr() const { return &data[0]; }
    bool unicast() const { return data[0] == 0x00; }
    bool multicast() const { return data[0] == 0x01; }
    bool broadcast() const { return data[0] == 0xff; }
    std::string string() const;

    operator uint64_t() const
    {
        uint64_t reg = 0;
        reg |= ((uint64_t)data[0]) << 40;
        reg |= ((uint64_t)data[1]) << 32;
        reg |= ((uint64_t)data[2]) << 24;
        reg |= ((uint64_t)data[3]) << 16;
        reg |= ((uint64_t)data[4]) << 8;
        reg |= ((uint64_t)data[5]) << 0;
        return reg;
    }

};

std::ostream &operator<<(std::ostream &stream, const EthAddr &ea);
bool operator==(const EthAddr &left, const EthAddr &right);

struct EthHdr : public eth_hdr
{
    uint16_t type() const { return ntohs(eth_type); }
    const EthAddr &src() const { return *(EthAddr *)&eth_src; }
    const EthAddr &dst() const { return *(EthAddr *)&eth_dst; }

    int size() const { return sizeof(eth_hdr); }

    const uint8_t *bytes() const { return (const uint8_t *)this; }
    const uint8_t *payload() const { return bytes() + size(); }
    uint8_t *bytes() { return (uint8_t *)this; }
    uint8_t *payload() { return bytes() + size(); }
};

class EthPtr
{
  protected:
    friend class IpPtr;
    PacketPtr p;

  public:
    EthPtr() {}
    EthPtr(const PacketPtr &ptr) : p(ptr) { }

    EthHdr *operator->() { return (EthHdr *)p->data; }
    EthHdr &operator*() { return *(EthHdr *)p->data; }
    operator EthHdr *() { return (EthHdr *)p->data; }

    const EthHdr *operator->() const { return (const EthHdr *)p->data; }
    const EthHdr &operator*() const { return *(const EthHdr *)p->data; }
    operator const EthHdr *() const { return (const EthHdr *)p->data; }

    const EthPtr &operator=(const PacketPtr &ptr) { p = ptr; return *this; }

    const PacketPtr packet() const { return p; }
    PacketPtr packet() { return p; }
    bool operator!() const { return !p; }
    operator bool() const { return p; }
};

/*
 * IP Stuff
 */
struct IpOpt;
struct IpHdr : public ip_hdr
{
    uint8_t  version() const { return ip_v; }
    uint8_t  hlen() const { return ip_hl * 4; }
    uint8_t  tos() const { return ip_tos; }
    uint16_t len() const { return ntohs(ip_len); }
    uint16_t id() const { return ntohs(ip_id); }
    uint16_t frag_flags() const { return ntohs(ip_off) >> 13; }
    uint16_t frag_off() const { return ntohs(ip_off) & 0x1fff; }
    uint8_t  ttl() const { return ip_ttl; }
    uint8_t  proto() const { return ip_p; }
    uint16_t sum() const { return ip_sum; }
    uint32_t src() const { return ntohl(ip_src); }
    uint32_t dst() const { return ntohl(ip_dst); }

    void sum(uint16_t sum) { ip_sum = sum; }

    bool options(std::vector<const IpOpt *> &vec) const;

    int size() const { return hlen(); }
    const uint8_t *bytes() const { return (const uint8_t *)this; }
    const uint8_t *payload() const { return bytes() + size(); }
    uint8_t *bytes() { return (uint8_t *)this; }
    uint8_t *payload() { return bytes() + size(); }
};

class IpPtr
{
  protected:
    friend class TcpPtr;
    friend class UdpPtr;
    PacketPtr p;

    const IpHdr *h() const
    { return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
    IpHdr *h() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }

    void set(const PacketPtr &ptr)
    {
        EthHdr *eth = (EthHdr *)ptr->data;
        if (eth->type() == ETH_TYPE_IP)
            p = ptr;
        else
            p = 0;
    }

  public:
    IpPtr() {}
    IpPtr(const PacketPtr &ptr) { set(ptr); }
    IpPtr(const EthPtr &ptr) { set(ptr.p); }
    IpPtr(const IpPtr &ptr) : p(ptr.p) { }

    IpHdr *operator->() { return h(); }
    IpHdr &operator*() { return *h(); }
    operator IpHdr *() { return h(); }

    const IpHdr *operator->() const { return h(); }
    const IpHdr &operator*() const { return *h(); }
    operator const IpHdr *() const { return h(); }

    const IpPtr &operator=(const PacketPtr &ptr) { set(ptr); return *this; }
    const IpPtr &operator=(const EthPtr &ptr) { set(ptr.p); return *this; }
    const IpPtr &operator=(const IpPtr &ptr) { p = ptr.p; return *this; }

    const PacketPtr packet() const { return p; }
    PacketPtr packet() { return p; }
    bool operator!() const { return !p; }
    operator bool() const { return p; }
    operator bool() { return p; }
};

uint16_t cksum(const IpPtr &ptr);

struct IpOpt : public ip_opt
{
    uint8_t type() const { return opt_type; }
    uint8_t typeNumber() const { return IP_OPT_NUMBER(opt_type); }
    uint8_t typeClass() const { return IP_OPT_CLASS(opt_type); }
    uint8_t typeCopied() const { return IP_OPT_COPIED(opt_type); }
    uint8_t len() const { return IP_OPT_TYPEONLY(type()) ? 1 : opt_len; }

    bool isNumber(int num) const { return typeNumber() == IP_OPT_NUMBER(num); }
    bool isClass(int cls) const { return typeClass() == IP_OPT_CLASS(cls); }
    bool isCopied(int cpy) const { return typeCopied() == IP_OPT_COPIED(cpy); }

    const uint8_t *data() const { return opt_data.data8; }
    void sec(ip_opt_data_sec &sec) const;
    void lsrr(ip_opt_data_rr &rr) const;
    void ssrr(ip_opt_data_rr &rr) const;
    void ts(ip_opt_data_ts &ts) const;
    uint16_t satid() const { return ntohs(opt_data.satid); }
    uint16_t mtup() const { return ntohs(opt_data.mtu); }
    uint16_t mtur() const { return ntohs(opt_data.mtu); }
    void tr(ip_opt_data_tr &tr) const;
    const uint32_t *addext() const { return &opt_data.addext[0]; }
    uint16_t rtralt() const { return ntohs(opt_data.rtralt); }
    void sdb(std::vector<uint32_t> &vec) const;
};

/*
 * TCP Stuff
 */
struct TcpOpt;
struct TcpHdr : public tcp_hdr
{
    uint16_t sport() const { return ntohs(th_sport); }
    uint16_t dport() const { return ntohs(th_dport); }
    uint32_t seq() const { return ntohl(th_seq); }
    uint32_t ack() const { return ntohl(th_ack); }
    uint8_t  off() const { return th_off; }
    uint8_t  flags() const { return th_flags & 0x3f; }
    uint16_t win() const { return ntohs(th_win); }
    uint16_t sum() const { return th_sum; }
    uint16_t urp() const { return ntohs(th_urp); }

    void sum(uint16_t sum) { th_sum = sum; }

    bool options(std::vector<const TcpOpt *> &vec) const;

    int size() const { return off(); }
    const uint8_t *bytes() const { return (const uint8_t *)this; }
    const uint8_t *payload() const { return bytes() + size(); }
    uint8_t *bytes() { return (uint8_t *)this; }
    uint8_t *payload() { return bytes() + size(); }
};

class TcpPtr
{
  protected:
    PacketPtr p;
    int off;

    const TcpHdr *h() const { return (const TcpHdr *)(p->data + off); }
    TcpHdr *h() { return (TcpHdr *)(p->data + off); }

    void set(const PacketPtr &ptr, int offset) { p = ptr; off = offset; }
    void set(const IpPtr &ptr)
    {
        if (ptr->proto() == IP_PROTO_TCP)
            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
        else
            set(0, 0);
    }

  public:
    TcpPtr() {}
    TcpPtr(const IpPtr &ptr) { set(ptr); }
    TcpPtr(const TcpPtr &ptr) : p(ptr.p), off(ptr.off) {}

    TcpHdr *operator->() { return h(); }
    TcpHdr &operator*() { return *h(); }
    operator TcpHdr *() { return h(); }

    const TcpHdr *operator->() const { return h(); }
    const TcpHdr &operator*() const { return *h(); }
    operator const TcpHdr *() const { return h(); }

    const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
    const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t.off); return *this; }

    const PacketPtr packet() const { return p; }
    PacketPtr packet() { return p; }
    bool operator!() const { return !p; }
    operator bool() const { return p; }
    operator bool() { return p; }
};

uint16_t cksum(const TcpPtr &ptr);

typedef Range<uint16_t> SackRange;

struct TcpOpt : public tcp_opt
{
    uint8_t type() const { return opt_type; }
    uint8_t len() const { return TCP_OPT_TYPEONLY(type()) ? 1 : opt_len; }

    bool isopt(int opt) const { return type() == opt; }

    const uint8_t *data() const { return opt_data.data8; }

    uint16_t mss() const { return ntohs(opt_data.mss); }
    uint8_t wscale() const { return opt_data.wscale; }
    bool sack(std::vector<SackRange> &vec) const;
    uint32_t echo() const { return ntohl(opt_data.echo); }
    uint32_t tsval() const { return ntohl(opt_data.timestamp[0]); }
    uint32_t tsecr() const { return ntohl(opt_data.timestamp[1]); }
    uint32_t cc() const { return ntohl(opt_data.cc); }
    uint8_t cksum() const{ return opt_data.cksum; }
    const uint8_t *md5() const { return opt_data.md5; }

    int size() const { return len(); }
    const uint8_t *bytes() const { return (const uint8_t *)this; }
    const uint8_t *payload() const { return bytes() + size(); }
    uint8_t *bytes() { return (uint8_t *)this; }
    uint8_t *payload() { return bytes() + size(); }
};

/*
 * UDP Stuff
 */
struct UdpHdr : public udp_hdr
{
    uint16_t sport() const { return ntohs(uh_sport); }
    uint16_t dport() const { return ntohs(uh_dport); }
    uint16_t len() const { return ntohs(uh_ulen); }
    uint16_t sum() const { return ntohs(uh_sum); }

    void sum(uint16_t sum) { uh_sum = htons(sum); }

    int size() const { return sizeof(udp_hdr); }
    const uint8_t *bytes() const { return (const uint8_t *)this; }
    const uint8_t *payload() const { return bytes() + size(); }
    uint8_t *bytes() { return (uint8_t *)this; }
    uint8_t *payload() { return bytes() + size(); }
};

class UdpPtr
{
  protected:
    PacketPtr p;
    int off;

    const UdpHdr *h() const { return (const UdpHdr *)(p->data + off); }
    UdpHdr *h() { return (UdpHdr *)(p->data + off); }

    void set(const PacketPtr &ptr, int offset) { p = ptr; off = offset; }
    void set(const IpPtr &ptr)
    {
        if (ptr->proto() == IP_PROTO_UDP)
            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
        else
            set(0, 0);
    }

  public:
    UdpPtr() {}
    UdpPtr(const IpPtr &ptr) { set(ptr); }
    UdpPtr(const UdpPtr &ptr) : p(ptr.p), off(ptr.off) {}

    UdpHdr *operator->() { return h(); }
    UdpHdr &operator*() { return *h(); }
    operator UdpHdr *() { return h(); }

    const UdpHdr *operator->() const { return h(); }
    const UdpHdr &operator*() const { return *h(); }
    operator const UdpHdr *() const { return h(); }

    const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
    const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t.off); return *this; }

    const PacketPtr packet() const { return p; }
    PacketPtr packet() { return p; }
    bool operator!() const { return !p; }
    operator bool() const { return p; }
    operator bool() { return p; }
};

uint16_t cksum(const UdpPtr &ptr);

/* namespace Net */ }

#endif // __BASE_INET_HH__