1 |
pcg |
1.1 |
/* |
2 |
|
|
device.h -- generic header for device.c |
3 |
pcg |
1.11 |
Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
4 |
pcg |
1.1 |
|
5 |
|
|
This program is free software; you can redistribute it and/or modify |
6 |
|
|
it under the terms of the GNU General Public License as published by |
7 |
|
|
the Free Software Foundation; either version 2 of the License, or |
8 |
|
|
(at your option) any later version. |
9 |
|
|
|
10 |
|
|
This program is distributed in the hope that it will be useful, |
11 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 |
|
|
GNU General Public License for more details. |
14 |
|
|
|
15 |
|
|
You should have received a copy of the GNU General Public License |
16 |
|
|
along with this program; if not, write to the Free Software |
17 |
|
|
Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 |
|
|
*/ |
19 |
|
|
|
20 |
|
|
#ifndef VPE_DEVICE_H__ |
21 |
|
|
#define VPE_DEVICE_H__ |
22 |
|
|
|
23 |
pcg |
1.7 |
#define IFNAMESIZE 256 // be conservative |
24 |
pcg |
1.1 |
|
25 |
|
|
#include "gettext.h" |
26 |
|
|
|
27 |
|
|
#include "global.h" |
28 |
|
|
|
29 |
|
|
struct net_packet { |
30 |
|
|
u32 len; // actually u16, but padding... |
31 |
|
|
|
32 |
pcg |
1.4 |
u8 &operator[] (u16 offset) const; |
33 |
pcg |
1.2 |
|
34 |
pcg |
1.5 |
void unshift_hdr (u16 hdrsize) |
35 |
|
|
{ |
36 |
|
|
memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
37 |
|
|
len += hdrsize; |
38 |
|
|
} |
39 |
|
|
|
40 |
pcg |
1.2 |
void skip_hdr (u16 hdrsize) |
41 |
|
|
{ |
42 |
pcg |
1.5 |
len -= hdrsize; |
43 |
|
|
memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
44 |
pcg |
1.2 |
} |
45 |
pcg |
1.1 |
|
46 |
pcg |
1.4 |
void set (const net_packet &pkt) |
47 |
|
|
{ |
48 |
|
|
len = pkt.len; |
49 |
|
|
memcpy (&((*this)[0]), &(pkt[0]), len); |
50 |
|
|
} |
51 |
|
|
|
52 |
pcg |
1.10 |
bool is_ipv4 () const |
53 |
|
|
{ |
54 |
|
|
return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP |
55 |
|
|
&& ((*this)[14] & 0xf0) == 0x40; // IPv4 |
56 |
|
|
} |
57 |
|
|
|
58 |
|
|
u32 &ipv4_src () const |
59 |
|
|
{ |
60 |
|
|
return *(u32 *)&(*this)[26]; |
61 |
|
|
} |
62 |
|
|
|
63 |
|
|
u32 &ipv4_dst () const |
64 |
|
|
{ |
65 |
|
|
return *(u32 *)&(*this)[30]; |
66 |
|
|
} |
67 |
|
|
|
68 |
|
|
bool is_arp () const |
69 |
pcg |
1.1 |
{ |
70 |
|
|
return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
71 |
|
|
&& (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
72 |
|
|
&& (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
73 |
|
|
&& (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len |
74 |
|
|
} |
75 |
|
|
|
76 |
|
|
void *operator new (size_t s); |
77 |
|
|
void operator delete (void *p); |
78 |
|
|
}; |
79 |
|
|
|
80 |
|
|
struct data_packet : net_packet { |
81 |
|
|
u8 data_[MAXSIZE]; |
82 |
|
|
}; |
83 |
|
|
|
84 |
|
|
inline |
85 |
pcg |
1.4 |
u8 &net_packet::operator[] (u16 offset) const |
86 |
pcg |
1.1 |
{ |
87 |
|
|
return ((data_packet *)this)->data_[offset]; |
88 |
|
|
} |
89 |
|
|
|
90 |
|
|
typedef u8 mac[6]; |
91 |
|
|
|
92 |
|
|
struct tap_packet : net_packet { |
93 |
|
|
mac dst; |
94 |
|
|
mac src; |
95 |
|
|
u8 data[MAXSIZE - 12]; |
96 |
|
|
}; |
97 |
|
|
|
98 |
pcg |
1.9 |
struct tap_device { |
99 |
pcg |
1.1 |
int fd; |
100 |
|
|
|
101 |
pcg |
1.7 |
// network interface name or identifier |
102 |
pcg |
1.6 |
char ifrname[IFNAMESIZE + 1]; |
103 |
pcg |
1.1 |
|
104 |
|
|
char *device; |
105 |
|
|
|
106 |
pcg |
1.8 |
tap_device (); |
107 |
|
|
~tap_device (); |
108 |
|
|
|
109 |
|
|
//bool open (); |
110 |
|
|
//void close (); |
111 |
pcg |
1.1 |
|
112 |
|
|
const char *interface () { return ifrname; } |
113 |
pcg |
1.6 |
const char *info (); |
114 |
pcg |
1.1 |
|
115 |
|
|
tap_packet *recv (); |
116 |
|
|
void send (tap_packet *pkt); |
117 |
|
|
}; |
118 |
pcg |
1.7 |
|
119 |
pcg |
1.8 |
//extern tap_device *tap_device (); |
120 |
pcg |
1.1 |
|
121 |
|
|
#endif |
122 |
|
|
|