inet.hh revision 7778 
1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * Copyright (c) 2010 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Nathan Binkert
30 *          Steve Reinhardt
31 *          Gabe Black
32 */
33
34#ifndef __BASE_INET_HH__
35#define __BASE_INET_HH__
36
37#include <iosfwd>
38#include <string>
39#include <utility>
40#include <vector>
41
42#include "base/range.hh"
43#include "base/types.hh"
44#include "dev/etherpkt.hh"
45
46#include "dnet/os.h"
47#include "dnet/eth.h"
48#include "dnet/ip.h"
49#include "dnet/ip6.h"
50#include "dnet/addr.h"
51#include "dnet/arp.h"
52#include "dnet/icmp.h"
53#include "dnet/tcp.h"
54#include "dnet/udp.h"
55#include "dnet/intf.h"
56#include "dnet/route.h"
57#include "dnet/fw.h"
58#include "dnet/blob.h"
59#include "dnet/rand.h"
60
61namespace Net {
62
63/*
64 * Ethernet Stuff
65 */
66struct EthAddr : protected eth_addr
67{
68  protected:
69    void parse(const std::string &addr);
70
71  public:
72    EthAddr();
73    EthAddr(const uint8_t ea[ETH_ADDR_LEN]);
74    EthAddr(const eth_addr &ea);
75    EthAddr(const std::string &addr);
76    const EthAddr &operator=(const eth_addr &ea);
77    const EthAddr &operator=(const std::string &addr);
78
79    int size() const { return sizeof(eth_addr); }
80
81    const uint8_t *bytes() const { return &data[0]; }
82    uint8_t *bytes() { return &data[0]; }
83
84    const uint8_t *addr() const { return &data[0]; }
85    bool unicast() const { return data[0] == 0x00; }
86    bool multicast() const { return data[0] == 0x01; }
87    bool broadcast() const { return data[0] == 0xff; }
88    std::string string() const;
89
90    operator uint64_t() const
91    {
92        uint64_t reg = 0;
93        reg |= ((uint64_t)data[0]) << 40;
94        reg |= ((uint64_t)data[1]) << 32;
95        reg |= ((uint64_t)data[2]) << 24;
96        reg |= ((uint64_t)data[3]) << 16;
97        reg |= ((uint64_t)data[4]) << 8;
98        reg |= ((uint64_t)data[5]) << 0;
99        return reg;
100    }
101
102};
103
104std::ostream &operator<<(std::ostream &stream, const EthAddr &ea);
105bool operator==(const EthAddr &left, const EthAddr &right);
106
107struct EthHdr : public eth_hdr
108{
109    uint16_t type() const { return ntohs(eth_type); }
110    const EthAddr &src() const { return *(EthAddr *)&eth_src; }
111    const EthAddr &dst() const { return *(EthAddr *)&eth_dst; }
112
113    int size() const { return sizeof(eth_hdr); }
114
115    const uint8_t *bytes() const { return (const uint8_t *)this; }
116    const uint8_t *payload() const { return bytes() + size(); }
117    uint8_t *bytes() { return (uint8_t *)this; }
118    uint8_t *payload() { return bytes() + size(); }
119};
120
121class EthPtr
122{
123  protected:
124    friend class IpPtr;
125    EthPacketPtr p;
126
127  public:
128    EthPtr() {}
129    EthPtr(const EthPacketPtr &ptr) : p(ptr) { }
130
131    EthHdr *operator->() { return (EthHdr *)p->data; }
132    EthHdr &operator*() { return *(EthHdr *)p->data; }
133    operator EthHdr *() { return (EthHdr *)p->data; }
134
135    const EthHdr *operator->() const { return (const EthHdr *)p->data; }
136    const EthHdr &operator*() const { return *(const EthHdr *)p->data; }
137    operator const EthHdr *() const { return (const EthHdr *)p->data; }
138
139    const EthPtr &operator=(const EthPacketPtr &ptr) { p = ptr; return *this; }
140
141    const EthPacketPtr packet() const { return p; }
142    EthPacketPtr packet() { return p; }
143    bool operator!() const { return !p; }
144    operator bool() const { return p; }
145    int off() const { return 0; }
146    int pstart() const { return off() + ((const EthHdr*)p->data)->size(); }
147};
148
149/*
150 * IP Stuff
151 */
152struct IpAddress
153{
154  protected:
155    uint32_t _ip;
156
157  public:
158    IpAddress() : _ip(0)
159    {}
160    IpAddress(const uint32_t __ip) : _ip(__ip)
161    {}
162
163    uint32_t ip() const { return _ip; }
164
165    std::string string() const;
166};
167
168std::ostream &operator<<(std::ostream &stream, const IpAddress &ia);
169bool operator==(const IpAddress &left, const IpAddress &right);
170
171struct IpNetmask : public IpAddress
172{
173  protected:
174    uint8_t _netmask;
175
176  public:
177    IpNetmask() : IpAddress(), _netmask(0)
178    {}
179    IpNetmask(const uint32_t __ip, const uint8_t __netmask) :
180        IpAddress(__ip), _netmask(__netmask)
181    {}
182
183    uint8_t netmask() const { return _netmask; }
184
185    std::string string() const;
186};
187
188std::ostream &operator<<(std::ostream &stream, const IpNetmask &in);
189bool operator==(const IpNetmask &left, const IpNetmask &right);
190
191struct IpWithPort : public IpAddress
192{
193  protected:
194    uint16_t _port;
195
196  public:
197    IpWithPort() : IpAddress(), _port(0)
198    {}
199    IpWithPort(const uint32_t __ip, const uint16_t __port) :
200        IpAddress(__ip), _port(__port)
201    {}
202
203    uint8_t port() const { return _port; }
204
205    std::string string() const;
206};
207
208std::ostream &operator<<(std::ostream &stream, const IpWithPort &iwp);
209bool operator==(const IpWithPort &left, const IpWithPort &right);
210
211struct IpOpt;
212struct IpHdr : public ip_hdr
213{
214    uint8_t  version() const { return ip_v; }
215    uint8_t  hlen() const { return ip_hl * 4; }
216    uint8_t  tos() const { return ip_tos; }
217    uint16_t len() const { return ntohs(ip_len); }
218    uint16_t id() const { return ntohs(ip_id); }
219    uint16_t frag_flags() const { return ntohs(ip_off) >> 13; }
220    uint16_t frag_off() const { return ntohs(ip_off) & 0x1fff; }
221    uint8_t  ttl() const { return ip_ttl; }
222    uint8_t  proto() const { return ip_p; }
223    uint16_t sum() const { return ip_sum; }
224    uint32_t src() const { return ntohl(ip_src); }
225    uint32_t dst() const { return ntohl(ip_dst); }
226
227    void sum(uint16_t sum) { ip_sum = sum; }
228    void id(uint16_t _id) { ip_id = htons(_id); }
229    void len(uint16_t _len) { ip_len = htons(_len); }
230
231
232    bool options(std::vector<const IpOpt *> &vec) const;
233
234    int size() const { return hlen(); }
235    const uint8_t *bytes() const { return (const uint8_t *)this; }
236    const uint8_t *payload() const { return bytes() + size(); }
237    uint8_t *bytes() { return (uint8_t *)this; }
238    uint8_t *payload() { return bytes() + size(); }
239};
240
241class IpPtr
242{
243  protected:
244    friend class TcpPtr;
245    friend class UdpPtr;
246    EthPacketPtr p;
247
248    void set(const EthPacketPtr &ptr)
249    {
250        p = 0;
251
252        if (ptr) {
253            EthHdr *eth = (EthHdr *)ptr->data;
254            if (eth->type() == ETH_TYPE_IP)
255                p = ptr;
256        }
257    }
258
259  public:
260    IpPtr() : p(0) {}
261    IpPtr(const EthPacketPtr &ptr) : p(0) { set(ptr); }
262    IpPtr(const EthPtr &ptr) : p(0) { set(ptr.p); }
263    IpPtr(const IpPtr &ptr) : p(ptr.p) { }
264
265    IpHdr *get() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }
266    IpHdr *operator->() { return get(); }
267    IpHdr &operator*() { return *get(); }
268
269    const IpHdr *get() const
270    { return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
271    const IpHdr *operator->() const { return get(); }
272    const IpHdr &operator*() const { return *get(); }
273
274    const IpPtr &operator=(const EthPacketPtr &ptr) { set(ptr); return *this; }
275    const IpPtr &operator=(const EthPtr &ptr) { set(ptr.p); return *this; }
276    const IpPtr &operator=(const IpPtr &ptr) { p = ptr.p; return *this; }
277
278    const EthPacketPtr packet() const { return p; }
279    EthPacketPtr packet() { return p; }
280    bool operator!() const { return !p; }
281    operator bool() const { return p; }
282    int off() const { return sizeof(eth_hdr); }
283    int pstart() const { return off() + get()->size(); }
284};
285
286uint16_t cksum(const IpPtr &ptr);
287
288struct IpOpt : public ip_opt
289{
290    uint8_t type() const { return opt_type; }
291    uint8_t typeNumber() const { return IP_OPT_NUMBER(opt_type); }
292    uint8_t typeClass() const { return IP_OPT_CLASS(opt_type); }
293    uint8_t typeCopied() const { return IP_OPT_COPIED(opt_type); }
294    uint8_t len() const { return IP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
295
296    bool isNumber(int num) const { return typeNumber() == IP_OPT_NUMBER(num); }
297    bool isClass(int cls) const { return typeClass() == IP_OPT_CLASS(cls); }
298    bool isCopied(int cpy) const { return typeCopied() == IP_OPT_COPIED(cpy); }
299
300    const uint8_t *data() const { return opt_data.data8; }
301    void sec(ip_opt_data_sec &sec) const;
302    void lsrr(ip_opt_data_rr &rr) const;
303    void ssrr(ip_opt_data_rr &rr) const;
304    void ts(ip_opt_data_ts &ts) const;
305    uint16_t satid() const { return ntohs(opt_data.satid); }
306    uint16_t mtup() const { return ntohs(opt_data.mtu); }
307    uint16_t mtur() const { return ntohs(opt_data.mtu); }
308    void tr(ip_opt_data_tr &tr) const;
309    const uint32_t *addext() const { return &opt_data.addext[0]; }
310    uint16_t rtralt() const { return ntohs(opt_data.rtralt); }
311    void sdb(std::vector<uint32_t> &vec) const;
312};
313
314/*
315 * TCP Stuff
316 */
317struct TcpOpt;
318struct TcpHdr : public tcp_hdr
319{
320    uint16_t sport() const { return ntohs(th_sport); }
321    uint16_t dport() const { return ntohs(th_dport); }
322    uint32_t seq() const { return ntohl(th_seq); }
323    uint32_t ack() const { return ntohl(th_ack); }
324    uint8_t  off() const { return th_off; }
325    uint8_t  flags() const { return th_flags & 0x3f; }
326    uint16_t win() const { return ntohs(th_win); }
327    uint16_t sum() const { return th_sum; }
328    uint16_t urp() const { return ntohs(th_urp); }
329
330    void sum(uint16_t sum) { th_sum = sum; }
331    void seq(uint32_t _seq) { th_seq = htonl(_seq); }
332    void flags(uint8_t _flags) { th_flags  = _flags; }
333
334    bool options(std::vector<const TcpOpt *> &vec) const;
335
336    int size() const { return off(); }
337    const uint8_t *bytes() const { return (const uint8_t *)this; }
338    const uint8_t *payload() const { return bytes() + size(); }
339    uint8_t *bytes() { return (uint8_t *)this; }
340    uint8_t *payload() { return bytes() + size(); }
341};
342
343class TcpPtr
344{
345  protected:
346    EthPacketPtr p;
347    int _off;
348
349    void set(const EthPacketPtr &ptr, int offset) { p = ptr; _off = offset; }
350    void set(const IpPtr &ptr)
351    {
352        if (ptr && ptr->proto() == IP_PROTO_TCP)
353            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
354        else
355            set(0, 0);
356    }
357
358  public:
359    TcpPtr() : p(0), _off(0) {}
360    TcpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
361    TcpPtr(const TcpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
362
363    TcpHdr *get() { return (TcpHdr *)(p->data + _off); }
364    TcpHdr *operator->() { return get(); }
365    TcpHdr &operator*() { return *get(); }
366
367    const TcpHdr *get() const { return (const TcpHdr *)(p->data + _off); }
368    const TcpHdr *operator->() const { return get(); }
369    const TcpHdr &operator*() const { return *get(); }
370
371    const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
372    const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t._off); return *this; }
373
374    const EthPacketPtr packet() const { return p; }
375    EthPacketPtr packet() { return p; }
376    bool operator!() const { return !p; }
377    operator bool() const { return p; }
378    int off() const { return _off; }
379    int pstart() const { return off() + get()->size(); }
380};
381
382uint16_t cksum(const TcpPtr &ptr);
383
384typedef Range<uint16_t> SackRange;
385
386struct TcpOpt : public tcp_opt
387{
388    uint8_t type() const { return opt_type; }
389    uint8_t len() const { return TCP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
390
391    bool isopt(int opt) const { return type() == opt; }
392
393    const uint8_t *data() const { return opt_data.data8; }
394
395    uint16_t mss() const { return ntohs(opt_data.mss); }
396    uint8_t wscale() const { return opt_data.wscale; }
397    bool sack(std::vector<SackRange> &vec) const;
398    uint32_t echo() const { return ntohl(opt_data.echo); }
399    uint32_t tsval() const { return ntohl(opt_data.timestamp[0]); }
400    uint32_t tsecr() const { return ntohl(opt_data.timestamp[1]); }
401    uint32_t cc() const { return ntohl(opt_data.cc); }
402    uint8_t cksum() const{ return opt_data.cksum; }
403    const uint8_t *md5() const { return opt_data.md5; }
404
405    int size() const { return len(); }
406    const uint8_t *bytes() const { return (const uint8_t *)this; }
407    const uint8_t *payload() const { return bytes() + size(); }
408    uint8_t *bytes() { return (uint8_t *)this; }
409    uint8_t *payload() { return bytes() + size(); }
410};
411
412/*
413 * UDP Stuff
414 */
415struct UdpHdr : public udp_hdr
416{
417    uint16_t sport() const { return ntohs(uh_sport); }
418    uint16_t dport() const { return ntohs(uh_dport); }
419    uint16_t len() const { return ntohs(uh_ulen); }
420    uint16_t sum() const { return uh_sum; }
421
422    void sum(uint16_t sum) { uh_sum = sum; }
423    void len(uint16_t _len) { uh_ulen = htons(_len); }
424
425    int size() const { return sizeof(udp_hdr); }
426    const uint8_t *bytes() const { return (const uint8_t *)this; }
427    const uint8_t *payload() const { return bytes() + size(); }
428    uint8_t *bytes() { return (uint8_t *)this; }
429    uint8_t *payload() { return bytes() + size(); }
430};
431
432class UdpPtr
433{
434  protected:
435    EthPacketPtr p;
436    int _off;
437
438    void set(const EthPacketPtr &ptr, int offset) { p = ptr; _off = offset; }
439    void set(const IpPtr &ptr)
440    {
441        if (ptr && ptr->proto() == IP_PROTO_UDP)
442            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
443        else
444            set(0, 0);
445    }
446
447  public:
448    UdpPtr() : p(0), _off(0) {}
449    UdpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
450    UdpPtr(const UdpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
451
452    UdpHdr *get() { return (UdpHdr *)(p->data + _off); }
453    UdpHdr *operator->() { return get(); }
454    UdpHdr &operator*() { return *get(); }
455
456    const UdpHdr *get() const { return (const UdpHdr *)(p->data + _off); }
457    const UdpHdr *operator->() const { return get(); }
458    const UdpHdr &operator*() const { return *get(); }
459
460    const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
461    const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t._off); return *this; }
462
463    const EthPacketPtr packet() const { return p; }
464    EthPacketPtr packet() { return p; }
465    bool operator!() const { return !p; }
466    operator bool() const { return p; }
467    int off() const { return _off; }
468    int pstart() const { return off() + get()->size(); }
469};
470
471uint16_t cksum(const UdpPtr &ptr);
472
473int hsplit(const EthPacketPtr &ptr);
474
475/* namespace Net */ }
476
477#endif // __BASE_INET_HH__
478