inet.hh revision 6216:2f4020838149 
1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#ifndef __BASE_INET_HH__
33#define __BASE_INET_HH__
34
35#include <iosfwd>
36#include <string>
37#include <utility>
38#include <vector>
39
40#include "base/range.hh"
41#include "base/types.hh"
42#include "dev/etherpkt.hh"
43
44#include "dnet/os.h"
45#include "dnet/eth.h"
46#include "dnet/ip.h"
47#include "dnet/ip6.h"
48#include "dnet/addr.h"
49#include "dnet/arp.h"
50#include "dnet/icmp.h"
51#include "dnet/tcp.h"
52#include "dnet/udp.h"
53#include "dnet/intf.h"
54#include "dnet/route.h"
55#include "dnet/fw.h"
56#include "dnet/blob.h"
57#include "dnet/rand.h"
58
59namespace Net {
60
61/*
62 * Ethernet Stuff
63 */
64struct EthAddr : protected eth_addr
65{
66  protected:
67    void parse(const std::string &addr);
68
69  public:
70    EthAddr();
71    EthAddr(const uint8_t ea[ETH_ADDR_LEN]);
72    EthAddr(const eth_addr &ea);
73    EthAddr(const std::string &addr);
74    const EthAddr &operator=(const eth_addr &ea);
75    const EthAddr &operator=(const std::string &addr);
76
77    int size() const { return sizeof(eth_addr); }
78
79    const uint8_t *bytes() const { return &data[0]; }
80    uint8_t *bytes() { return &data[0]; }
81
82    const uint8_t *addr() const { return &data[0]; }
83    bool unicast() const { return data[0] == 0x00; }
84    bool multicast() const { return data[0] == 0x01; }
85    bool broadcast() const { return data[0] == 0xff; }
86    std::string string() const;
87
88    operator uint64_t() const
89    {
90        uint64_t reg = 0;
91        reg |= ((uint64_t)data[0]) << 40;
92        reg |= ((uint64_t)data[1]) << 32;
93        reg |= ((uint64_t)data[2]) << 24;
94        reg |= ((uint64_t)data[3]) << 16;
95        reg |= ((uint64_t)data[4]) << 8;
96        reg |= ((uint64_t)data[5]) << 0;
97        return reg;
98    }
99
100};
101
102std::ostream &operator<<(std::ostream &stream, const EthAddr &ea);
103bool operator==(const EthAddr &left, const EthAddr &right);
104
105struct EthHdr : public eth_hdr
106{
107    uint16_t type() const { return ntohs(eth_type); }
108    const EthAddr &src() const { return *(EthAddr *)&eth_src; }
109    const EthAddr &dst() const { return *(EthAddr *)&eth_dst; }
110
111    int size() const { return sizeof(eth_hdr); }
112
113    const uint8_t *bytes() const { return (const uint8_t *)this; }
114    const uint8_t *payload() const { return bytes() + size(); }
115    uint8_t *bytes() { return (uint8_t *)this; }
116    uint8_t *payload() { return bytes() + size(); }
117};
118
119class EthPtr
120{
121  protected:
122    friend class IpPtr;
123    EthPacketPtr p;
124
125  public:
126    EthPtr() {}
127    EthPtr(const EthPacketPtr &ptr) : p(ptr) { }
128
129    EthHdr *operator->() { return (EthHdr *)p->data; }
130    EthHdr &operator*() { return *(EthHdr *)p->data; }
131    operator EthHdr *() { return (EthHdr *)p->data; }
132
133    const EthHdr *operator->() const { return (const EthHdr *)p->data; }
134    const EthHdr &operator*() const { return *(const EthHdr *)p->data; }
135    operator const EthHdr *() const { return (const EthHdr *)p->data; }
136
137    const EthPtr &operator=(const EthPacketPtr &ptr) { p = ptr; return *this; }
138
139    const EthPacketPtr packet() const { return p; }
140    EthPacketPtr packet() { return p; }
141    bool operator!() const { return !p; }
142    operator bool() const { return p; }
143    int off() const { return 0; }
144    int pstart() const { return off() + ((const EthHdr*)p->data)->size(); }
145};
146
147/*
148 * IP Stuff
149 */
150struct IpOpt;
151struct IpHdr : public ip_hdr
152{
153    uint8_t  version() const { return ip_v; }
154    uint8_t  hlen() const { return ip_hl * 4; }
155    uint8_t  tos() const { return ip_tos; }
156    uint16_t len() const { return ntohs(ip_len); }
157    uint16_t id() const { return ntohs(ip_id); }
158    uint16_t frag_flags() const { return ntohs(ip_off) >> 13; }
159    uint16_t frag_off() const { return ntohs(ip_off) & 0x1fff; }
160    uint8_t  ttl() const { return ip_ttl; }
161    uint8_t  proto() const { return ip_p; }
162    uint16_t sum() const { return ip_sum; }
163    uint32_t src() const { return ntohl(ip_src); }
164    uint32_t dst() const { return ntohl(ip_dst); }
165
166    void sum(uint16_t sum) { ip_sum = sum; }
167    void id(uint16_t _id) { ip_id = htons(_id); }
168    void len(uint16_t _len) { ip_len = htons(_len); }
169
170
171    bool options(std::vector<const IpOpt *> &vec) const;
172
173    int size() const { return hlen(); }
174    const uint8_t *bytes() const { return (const uint8_t *)this; }
175    const uint8_t *payload() const { return bytes() + size(); }
176    uint8_t *bytes() { return (uint8_t *)this; }
177    uint8_t *payload() { return bytes() + size(); }
178};
179
180class IpPtr
181{
182  protected:
183    friend class TcpPtr;
184    friend class UdpPtr;
185    EthPacketPtr p;
186
187    void set(const EthPacketPtr &ptr)
188    {
189        p = 0;
190
191        if (ptr) {
192            EthHdr *eth = (EthHdr *)ptr->data;
193            if (eth->type() == ETH_TYPE_IP)
194                p = ptr;
195        }
196    }
197
198  public:
199    IpPtr() : p(0) {}
200    IpPtr(const EthPacketPtr &ptr) : p(0) { set(ptr); }
201    IpPtr(const EthPtr &ptr) : p(0) { set(ptr.p); }
202    IpPtr(const IpPtr &ptr) : p(ptr.p) { }
203
204    IpHdr *get() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }
205    IpHdr *operator->() { return get(); }
206    IpHdr &operator*() { return *get(); }
207
208    const IpHdr *get() const
209    { return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
210    const IpHdr *operator->() const { return get(); }
211    const IpHdr &operator*() const { return *get(); }
212
213    const IpPtr &operator=(const EthPacketPtr &ptr) { set(ptr); return *this; }
214    const IpPtr &operator=(const EthPtr &ptr) { set(ptr.p); return *this; }
215    const IpPtr &operator=(const IpPtr &ptr) { p = ptr.p; return *this; }
216
217    const EthPacketPtr packet() const { return p; }
218    EthPacketPtr packet() { return p; }
219    bool operator!() const { return !p; }
220    operator bool() const { return p; }
221    int off() const { return sizeof(eth_hdr); }
222    int pstart() const { return off() + get()->size(); }
223};
224
225uint16_t cksum(const IpPtr &ptr);
226
227struct IpOpt : public ip_opt
228{
229    uint8_t type() const { return opt_type; }
230    uint8_t typeNumber() const { return IP_OPT_NUMBER(opt_type); }
231    uint8_t typeClass() const { return IP_OPT_CLASS(opt_type); }
232    uint8_t typeCopied() const { return IP_OPT_COPIED(opt_type); }
233    uint8_t len() const { return IP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
234
235    bool isNumber(int num) const { return typeNumber() == IP_OPT_NUMBER(num); }
236    bool isClass(int cls) const { return typeClass() == IP_OPT_CLASS(cls); }
237    bool isCopied(int cpy) const { return typeCopied() == IP_OPT_COPIED(cpy); }
238
239    const uint8_t *data() const { return opt_data.data8; }
240    void sec(ip_opt_data_sec &sec) const;
241    void lsrr(ip_opt_data_rr &rr) const;
242    void ssrr(ip_opt_data_rr &rr) const;
243    void ts(ip_opt_data_ts &ts) const;
244    uint16_t satid() const { return ntohs(opt_data.satid); }
245    uint16_t mtup() const { return ntohs(opt_data.mtu); }
246    uint16_t mtur() const { return ntohs(opt_data.mtu); }
247    void tr(ip_opt_data_tr &tr) const;
248    const uint32_t *addext() const { return &opt_data.addext[0]; }
249    uint16_t rtralt() const { return ntohs(opt_data.rtralt); }
250    void sdb(std::vector<uint32_t> &vec) const;
251};
252
253/*
254 * TCP Stuff
255 */
256struct TcpOpt;
257struct TcpHdr : public tcp_hdr
258{
259    uint16_t sport() const { return ntohs(th_sport); }
260    uint16_t dport() const { return ntohs(th_dport); }
261    uint32_t seq() const { return ntohl(th_seq); }
262    uint32_t ack() const { return ntohl(th_ack); }
263    uint8_t  off() const { return th_off; }
264    uint8_t  flags() const { return th_flags & 0x3f; }
265    uint16_t win() const { return ntohs(th_win); }
266    uint16_t sum() const { return th_sum; }
267    uint16_t urp() const { return ntohs(th_urp); }
268
269    void sum(uint16_t sum) { th_sum = sum; }
270    void seq(uint32_t _seq) { th_seq = htonl(_seq); }
271    void flags(uint8_t _flags) { th_flags  = _flags; }
272
273    bool options(std::vector<const TcpOpt *> &vec) const;
274
275    int size() const { return off(); }
276    const uint8_t *bytes() const { return (const uint8_t *)this; }
277    const uint8_t *payload() const { return bytes() + size(); }
278    uint8_t *bytes() { return (uint8_t *)this; }
279    uint8_t *payload() { return bytes() + size(); }
280};
281
282class TcpPtr
283{
284  protected:
285    EthPacketPtr p;
286    int _off;
287
288    void set(const EthPacketPtr &ptr, int offset) { p = ptr; _off = offset; }
289    void set(const IpPtr &ptr)
290    {
291        if (ptr && ptr->proto() == IP_PROTO_TCP)
292            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
293        else
294            set(0, 0);
295    }
296
297  public:
298    TcpPtr() : p(0), _off(0) {}
299    TcpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
300    TcpPtr(const TcpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
301
302    TcpHdr *get() { return (TcpHdr *)(p->data + _off); }
303    TcpHdr *operator->() { return get(); }
304    TcpHdr &operator*() { return *get(); }
305
306    const TcpHdr *get() const { return (const TcpHdr *)(p->data + _off); }
307    const TcpHdr *operator->() const { return get(); }
308    const TcpHdr &operator*() const { return *get(); }
309
310    const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
311    const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t._off); return *this; }
312
313    const EthPacketPtr packet() const { return p; }
314    EthPacketPtr packet() { return p; }
315    bool operator!() const { return !p; }
316    operator bool() const { return p; }
317    int off() const { return _off; }
318    int pstart() const { return off() + get()->size(); }
319};
320
321uint16_t cksum(const TcpPtr &ptr);
322
323typedef Range<uint16_t> SackRange;
324
325struct TcpOpt : public tcp_opt
326{
327    uint8_t type() const { return opt_type; }
328    uint8_t len() const { return TCP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
329
330    bool isopt(int opt) const { return type() == opt; }
331
332    const uint8_t *data() const { return opt_data.data8; }
333
334    uint16_t mss() const { return ntohs(opt_data.mss); }
335    uint8_t wscale() const { return opt_data.wscale; }
336    bool sack(std::vector<SackRange> &vec) const;
337    uint32_t echo() const { return ntohl(opt_data.echo); }
338    uint32_t tsval() const { return ntohl(opt_data.timestamp[0]); }
339    uint32_t tsecr() const { return ntohl(opt_data.timestamp[1]); }
340    uint32_t cc() const { return ntohl(opt_data.cc); }
341    uint8_t cksum() const{ return opt_data.cksum; }
342    const uint8_t *md5() const { return opt_data.md5; }
343
344    int size() const { return len(); }
345    const uint8_t *bytes() const { return (const uint8_t *)this; }
346    const uint8_t *payload() const { return bytes() + size(); }
347    uint8_t *bytes() { return (uint8_t *)this; }
348    uint8_t *payload() { return bytes() + size(); }
349};
350
351/*
352 * UDP Stuff
353 */
354struct UdpHdr : public udp_hdr
355{
356    uint16_t sport() const { return ntohs(uh_sport); }
357    uint16_t dport() const { return ntohs(uh_dport); }
358    uint16_t len() const { return ntohs(uh_ulen); }
359    uint16_t sum() const { return uh_sum; }
360
361    void sum(uint16_t sum) { uh_sum = sum; }
362    void len(uint16_t _len) { uh_ulen = htons(_len); }
363
364    int size() const { return sizeof(udp_hdr); }
365    const uint8_t *bytes() const { return (const uint8_t *)this; }
366    const uint8_t *payload() const { return bytes() + size(); }
367    uint8_t *bytes() { return (uint8_t *)this; }
368    uint8_t *payload() { return bytes() + size(); }
369};
370
371class UdpPtr
372{
373  protected:
374    EthPacketPtr p;
375    int _off;
376
377    void set(const EthPacketPtr &ptr, int offset) { p = ptr; _off = offset; }
378    void set(const IpPtr &ptr)
379    {
380        if (ptr && ptr->proto() == IP_PROTO_UDP)
381            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
382        else
383            set(0, 0);
384    }
385
386  public:
387    UdpPtr() : p(0), _off(0) {}
388    UdpPtr(const IpPtr &ptr) : p(0), _off(0) { set(ptr); }
389    UdpPtr(const UdpPtr &ptr) : p(ptr.p), _off(ptr._off) {}
390
391    UdpHdr *get() { return (UdpHdr *)(p->data + _off); }
392    UdpHdr *operator->() { return get(); }
393    UdpHdr &operator*() { return *get(); }
394
395    const UdpHdr *get() const { return (const UdpHdr *)(p->data + _off); }
396    const UdpHdr *operator->() const { return get(); }
397    const UdpHdr &operator*() const { return *get(); }
398
399    const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
400    const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t._off); return *this; }
401
402    const EthPacketPtr packet() const { return p; }
403    EthPacketPtr packet() { return p; }
404    bool operator!() const { return !p; }
405    operator bool() const { return p; }
406    int off() const { return _off; }
407    int pstart() const { return off() + get()->size(); }
408};
409
410uint16_t cksum(const UdpPtr &ptr);
411
412int hsplit(const EthPacketPtr &ptr);
413
414/* namespace Net */ }
415
416#endif // __BASE_INET_HH__
417