inet.hh revision 1171 
1/*
2 * Copyright (c) 2002-2003 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
29#ifndef __BASE_INET_HH__
30#define __BASE_INET_HH__
31
32#include <iosfwd>
33#include <string>
34#include <utility>
35#include <vector>
36
37#include "base/range.hh"
38#include "dev/etherpkt.hh"
39#include "sim/host.hh"
40
41#include "dnet/os.h"
42#include "dnet/eth.h"
43#include "dnet/ip.h"
44#include "dnet/ip6.h"
45#include "dnet/addr.h"
46#include "dnet/arp.h"
47#include "dnet/icmp.h"
48#include "dnet/tcp.h"
49#include "dnet/udp.h"
50#include "dnet/intf.h"
51#include "dnet/route.h"
52#include "dnet/fw.h"
53#include "dnet/blob.h"
54#include "dnet/rand.h"
55
56namespace Net {
57
58/*
59 * Ethernet Stuff
60 */
61struct EthAddr : protected eth_addr
62{
63  protected:
64    void parse(const std::string &addr);
65
66  public:
67    EthAddr();
68    EthAddr(const uint8_t ea[ETH_ADDR_LEN]);
69    EthAddr(const eth_addr &ea);
70    EthAddr(const std::string &addr);
71    const EthAddr &operator=(const eth_addr &ea);
72    const EthAddr &operator=(const std::string &addr);
73
74    int size() const { return sizeof(eth_addr); }
75
76    const uint8_t *bytes() const { return &data[0]; }
77    uint8_t *bytes() { return &data[0]; }
78
79    const uint8_t *addr() const { return &data[0]; }
80    bool unicast() const { return data[0] == 0x00; }
81    bool multicast() const { return data[0] == 0x01; }
82    bool broadcast() const { return data[0] == 0xff; }
83    std::string string() const;
84
85    operator uint64_t() const
86    {
87        uint64_t reg = 0;
88        reg |= ((uint64_t)data[0]) << 40;
89        reg |= ((uint64_t)data[1]) << 32;
90        reg |= ((uint64_t)data[2]) << 24;
91        reg |= ((uint64_t)data[3]) << 16;
92        reg |= ((uint64_t)data[4]) << 8;
93        reg |= ((uint64_t)data[5]) << 0;
94        return reg;
95    }
96
97};
98
99std::ostream &operator<<(std::ostream &stream, const EthAddr &ea);
100bool operator==(const EthAddr &left, const EthAddr &right);
101
102struct EthHdr : public eth_hdr
103{
104    uint16_t type() const { return ntohs(eth_type); }
105    const EthAddr &src() const { return *(EthAddr *)&eth_src; }
106    const EthAddr &dst() const { return *(EthAddr *)&eth_dst; }
107
108    int size() const { return sizeof(eth_hdr); }
109
110    const uint8_t *bytes() const { return (const uint8_t *)this; }
111    const uint8_t *payload() const { return bytes() + size(); }
112    uint8_t *bytes() { return (uint8_t *)this; }
113    uint8_t *payload() { return bytes() + size(); }
114};
115
116class EthPtr
117{
118  protected:
119    friend class IpPtr;
120    PacketPtr p;
121
122  public:
123    EthPtr() {}
124    EthPtr(const PacketPtr &ptr) : p(ptr) { }
125
126    EthHdr *operator->() { return (EthHdr *)p->data; }
127    EthHdr &operator*() { return *(EthHdr *)p->data; }
128    operator EthHdr *() { return (EthHdr *)p->data; }
129
130    const EthHdr *operator->() const { return (const EthHdr *)p->data; }
131    const EthHdr &operator*() const { return *(const EthHdr *)p->data; }
132    operator const EthHdr *() const { return (const EthHdr *)p->data; }
133
134    const EthPtr &operator=(const PacketPtr &ptr) { p = ptr; return *this; }
135
136    const PacketPtr packet() const { return p; }
137    PacketPtr packet() { return p; }
138    bool operator!() const { return !p; }
139    operator bool() const { return p; }
140};
141
142/*
143 * IP Stuff
144 */
145struct IpOpt;
146struct IpHdr : public ip_hdr
147{
148    uint8_t  version() const { return ip_v; }
149    uint8_t  hlen() const { return ip_hl * 4; }
150    uint8_t  tos() const { return ip_tos; }
151    uint16_t len() const { return ntohs(ip_len); }
152    uint16_t id() const { return ntohs(ip_id); }
153    uint16_t frag_flags() const { return ntohs(ip_off) >> 13; }
154    uint16_t frag_off() const { return ntohs(ip_off) & 0x1fff; }
155    uint8_t  ttl() const { return ip_ttl; }
156    uint8_t  proto() const { return ip_p; }
157    uint16_t sum() const { return ip_sum; }
158    uint32_t src() const { return ntohl(ip_src); }
159    uint32_t dst() const { return ntohl(ip_dst); }
160
161    void sum(uint16_t sum) { ip_sum = sum; }
162
163    bool options(std::vector<const IpOpt *> &vec) const;
164
165    int size() const { return hlen(); }
166    const uint8_t *bytes() const { return (const uint8_t *)this; }
167    const uint8_t *payload() const { return bytes() + size(); }
168    uint8_t *bytes() { return (uint8_t *)this; }
169    uint8_t *payload() { return bytes() + size(); }
170};
171
172class IpPtr
173{
174  protected:
175    friend class TcpPtr;
176    friend class UdpPtr;
177    PacketPtr p;
178
179    const IpHdr *h() const
180    { return (const IpHdr *)(p->data + sizeof(eth_hdr)); }
181    IpHdr *h() { return (IpHdr *)(p->data + sizeof(eth_hdr)); }
182
183    void set(const PacketPtr &ptr)
184    {
185        EthHdr *eth = (EthHdr *)ptr->data;
186        if (eth->type() == ETH_TYPE_IP)
187            p = ptr;
188        else
189            p = 0;
190    }
191
192  public:
193    IpPtr() {}
194    IpPtr(const PacketPtr &ptr) { set(ptr); }
195    IpPtr(const EthPtr &ptr) { set(ptr.p); }
196    IpPtr(const IpPtr &ptr) : p(ptr.p) { }
197
198    IpHdr *operator->() { return h(); }
199    IpHdr &operator*() { return *h(); }
200    operator IpHdr *() { return h(); }
201
202    const IpHdr *operator->() const { return h(); }
203    const IpHdr &operator*() const { return *h(); }
204    operator const IpHdr *() const { return h(); }
205
206    const IpPtr &operator=(const PacketPtr &ptr) { set(ptr); return *this; }
207    const IpPtr &operator=(const EthPtr &ptr) { set(ptr.p); return *this; }
208    const IpPtr &operator=(const IpPtr &ptr) { p = ptr.p; return *this; }
209
210    const PacketPtr packet() const { return p; }
211    PacketPtr packet() { return p; }
212    bool operator!() const { return !p; }
213    operator bool() const { return p; }
214    operator bool() { return p; }
215};
216
217uint16_t cksum(const IpPtr &ptr);
218
219struct IpOpt : public ip_opt
220{
221    uint8_t type() const { return opt_type; }
222    uint8_t typeNumber() const { return IP_OPT_NUMBER(opt_type); }
223    uint8_t typeClass() const { return IP_OPT_CLASS(opt_type); }
224    uint8_t typeCopied() const { return IP_OPT_COPIED(opt_type); }
225    uint8_t len() const { return IP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
226
227    bool isNumber(int num) const { return typeNumber() == IP_OPT_NUMBER(num); }
228    bool isClass(int cls) const { return typeClass() == IP_OPT_CLASS(cls); }
229    bool isCopied(int cpy) const { return typeCopied() == IP_OPT_COPIED(cpy); }
230
231    const uint8_t *data() const { return opt_data.data8; }
232    void sec(ip_opt_data_sec &sec) const;
233    void lsrr(ip_opt_data_rr &rr) const;
234    void ssrr(ip_opt_data_rr &rr) const;
235    void ts(ip_opt_data_ts &ts) const;
236    uint16_t satid() const { return ntohs(opt_data.satid); }
237    uint16_t mtup() const { return ntohs(opt_data.mtu); }
238    uint16_t mtur() const { return ntohs(opt_data.mtu); }
239    void tr(ip_opt_data_tr &tr) const;
240    const uint32_t *addext() const { return &opt_data.addext[0]; }
241    uint16_t rtralt() const { return ntohs(opt_data.rtralt); }
242    void sdb(std::vector<uint32_t> &vec) const;
243};
244
245/*
246 * TCP Stuff
247 */
248struct TcpOpt;
249struct TcpHdr : public tcp_hdr
250{
251    uint16_t sport() const { return ntohs(th_sport); }
252    uint16_t dport() const { return ntohs(th_dport); }
253    uint32_t seq() const { return ntohl(th_seq); }
254    uint32_t ack() const { return ntohl(th_ack); }
255    uint8_t  off() const { return th_off; }
256    uint8_t  flags() const { return th_flags & 0x3f; }
257    uint16_t win() const { return ntohs(th_win); }
258    uint16_t sum() const { return th_sum; }
259    uint16_t urp() const { return ntohs(th_urp); }
260
261    void sum(uint16_t sum) { th_sum = sum; }
262
263    bool options(std::vector<const TcpOpt *> &vec) const;
264
265    int size() const { return off(); }
266    const uint8_t *bytes() const { return (const uint8_t *)this; }
267    const uint8_t *payload() const { return bytes() + size(); }
268    uint8_t *bytes() { return (uint8_t *)this; }
269    uint8_t *payload() { return bytes() + size(); }
270};
271
272class TcpPtr
273{
274  protected:
275    PacketPtr p;
276    int off;
277
278    const TcpHdr *h() const { return (const TcpHdr *)(p->data + off); }
279    TcpHdr *h() { return (TcpHdr *)(p->data + off); }
280
281    void set(const PacketPtr &ptr, int offset) { p = ptr; off = offset; }
282    void set(const IpPtr &ptr)
283    {
284        if (ptr->proto() == IP_PROTO_TCP)
285            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
286        else
287            set(0, 0);
288    }
289
290  public:
291    TcpPtr() {}
292    TcpPtr(const IpPtr &ptr) { set(ptr); }
293    TcpPtr(const TcpPtr &ptr) : p(ptr.p), off(ptr.off) {}
294
295    TcpHdr *operator->() { return h(); }
296    TcpHdr &operator*() { return *h(); }
297    operator TcpHdr *() { return h(); }
298
299    const TcpHdr *operator->() const { return h(); }
300    const TcpHdr &operator*() const { return *h(); }
301    operator const TcpHdr *() const { return h(); }
302
303    const TcpPtr &operator=(const IpPtr &i) { set(i); return *this; }
304    const TcpPtr &operator=(const TcpPtr &t) { set(t.p, t.off); return *this; }
305
306    const PacketPtr packet() const { return p; }
307    PacketPtr packet() { return p; }
308    bool operator!() const { return !p; }
309    operator bool() const { return p; }
310    operator bool() { return p; }
311};
312
313uint16_t cksum(const TcpPtr &ptr);
314
315typedef Range<uint16_t> SackRange;
316
317struct TcpOpt : public tcp_opt
318{
319    uint8_t type() const { return opt_type; }
320    uint8_t len() const { return TCP_OPT_TYPEONLY(type()) ? 1 : opt_len; }
321
322    bool isopt(int opt) const { return type() == opt; }
323
324    const uint8_t *data() const { return opt_data.data8; }
325
326    uint16_t mss() const { return ntohs(opt_data.mss); }
327    uint8_t wscale() const { return opt_data.wscale; }
328    bool sack(std::vector<SackRange> &vec) const;
329    uint32_t echo() const { return ntohl(opt_data.echo); }
330    uint32_t tsval() const { return ntohl(opt_data.timestamp[0]); }
331    uint32_t tsecr() const { return ntohl(opt_data.timestamp[1]); }
332    uint32_t cc() const { return ntohl(opt_data.cc); }
333    uint8_t cksum() const{ return opt_data.cksum; }
334    const uint8_t *md5() const { return opt_data.md5; }
335
336    int size() const { return len(); }
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
343/*
344 * UDP Stuff
345 */
346struct UdpHdr : public udp_hdr
347{
348    uint16_t sport() const { return ntohs(uh_sport); }
349    uint16_t dport() const { return ntohs(uh_dport); }
350    uint16_t len() const { return ntohs(uh_ulen); }
351    uint16_t sum() const { return uh_sum; }
352
353    void sum(uint16_t sum) { uh_sum = sum; }
354
355    int size() const { return sizeof(udp_hdr); }
356    const uint8_t *bytes() const { return (const uint8_t *)this; }
357    const uint8_t *payload() const { return bytes() + size(); }
358    uint8_t *bytes() { return (uint8_t *)this; }
359    uint8_t *payload() { return bytes() + size(); }
360};
361
362class UdpPtr
363{
364  protected:
365    PacketPtr p;
366    int off;
367
368    const UdpHdr *h() const { return (const UdpHdr *)(p->data + off); }
369    UdpHdr *h() { return (UdpHdr *)(p->data + off); }
370
371    void set(const PacketPtr &ptr, int offset) { p = ptr; off = offset; }
372    void set(const IpPtr &ptr)
373    {
374        if (ptr->proto() == IP_PROTO_UDP)
375            set(ptr.p, sizeof(eth_hdr) + ptr->hlen());
376        else
377            set(0, 0);
378    }
379
380  public:
381    UdpPtr() {}
382    UdpPtr(const IpPtr &ptr) { set(ptr); }
383    UdpPtr(const UdpPtr &ptr) : p(ptr.p), off(ptr.off) {}
384
385    UdpHdr *operator->() { return h(); }
386    UdpHdr &operator*() { return *h(); }
387    operator UdpHdr *() { return h(); }
388
389    const UdpHdr *operator->() const { return h(); }
390    const UdpHdr &operator*() const { return *h(); }
391    operator const UdpHdr *() const { return h(); }
392
393    const UdpPtr &operator=(const IpPtr &i) { set(i); return *this; }
394    const UdpPtr &operator=(const UdpPtr &t) { set(t.p, t.off); return *this; }
395
396    const PacketPtr packet() const { return p; }
397    PacketPtr packet() { return p; }
398    bool operator!() const { return !p; }
399    operator bool() const { return p; }
400    operator bool() { return p; }
401};
402
403uint16_t cksum(const UdpPtr &ptr);
404
405/* namespace Net */ }
406
407#endif // __BASE_INET_HH__
408