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Comparing gvpe/src/device.h (file contents):
Revision 1.3 by pcg, Wed Apr 2 03:25:17 2003 UTC vs.
Revision 1.21 by pcg, Sun Dec 2 00:09:36 2007 UTC

1/* 1/*
2 device.h -- generic header for device.c 2 device.h -- generic header for device.c
3 Copyright (C) 2003-2005 Marc Lehmann <gvpe@schmorp.de>
3 4
5 This file is part of GVPE.
6
4 This program is free software; you can redistribute it and/or modify 7 GVPE is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by 8 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or 9 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version. 10 (at your option) any later version.
8 11
9 This program is distributed in the hope that it will be useful, 12 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details. 15 GNU General Public License for more details.
13 16
14 You should have received a copy of the GNU General Public License 17 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software 18 along with gvpe; if not, write to the Free Software
16 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17*/ 20*/
18 21
19#ifndef VPE_DEVICE_H__ 22#ifndef GVPE_DEVICE_H__
20#define VPE_DEVICE_H__ 23#define GVPE_DEVICE_H__
21 24
22#include <net/if.h> 25#include "config.h"
23 26
24#include "gettext.h" 27#define IFNAMESIZE 256 // be conservative
25 28
26#include "global.h" 29#include "global.h"
30#include "util.h"
27 31
28struct net_packet { 32struct net_packet
33{
29 u32 len; // actually u16, but padding... 34 u32 len; // actually u16, but padding...
30 35
31 u8 &operator[] (u16 offset); 36 u8 &operator[] (u16 offset) const;
37 u8 *at (u16 offset) const;
38
39 void unshift_hdr (u16 hdrsize)
40 {
41 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
42 len += hdrsize;
43 }
32 44
33 void skip_hdr (u16 hdrsize) 45 void skip_hdr (u16 hdrsize)
34 { 46 {
47 len -= hdrsize;
35 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 48 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
36 } 49 }
37 50
51 void set (const net_packet &pkt)
52 {
53 len = pkt.len;
54 memcpy (&((*this)[0]), &(pkt[0]), len);
55 }
56
57 bool is_ipv4 () const
58 {
59 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
60 && ((*this)[14] & 0xf0) == 0x40; // IPv4
61 }
62
63 u32 &ipv4_src () const
64 {
65 return *(u32 *)&(*this)[26];
66 }
67
68 u32 &ipv4_dst () const
69 {
70 return *(u32 *)&(*this)[30];
71 }
72
38 bool is_arp () 73 bool is_arp () const
39 { 74 {
40 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 75 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
41 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 76 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
42 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 77 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
43 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 78 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
45 80
46 void *operator new (size_t s); 81 void *operator new (size_t s);
47 void operator delete (void *p); 82 void operator delete (void *p);
48}; 83};
49 84
50struct data_packet : net_packet { 85struct data_packet : net_packet
86{
51 u8 data_[MAXSIZE]; 87 u8 data_[MAXSIZE];
52}; 88};
53 89
54inline 90inline
55u8 &net_packet::operator[] (u16 offset) 91u8 &net_packet::operator[] (u16 offset) const
56{ 92{
57 return ((data_packet *)this)->data_[offset]; 93 return ((data_packet *)this)->data_[offset];
58} 94}
59 95
60typedef u8 mac[6]; 96inline
97u8 *net_packet::at (u16 offset) const
98{
99 return &((*this)[offset]);
100}
61 101
62struct tap_packet : net_packet { 102struct tap_packet : net_packet
103{
63 mac dst; 104 mac dst;
64 mac src; 105 mac src;
65 u8 data[MAXSIZE - 12]; 106 u8 data[MAXSIZE - 12];
66}; 107};
67 108
68struct tap_device { 109struct tap_device
110{
69 int fd; 111 int fd;
70 112
71 // linux tuntap 113 // network interface name or identifier
72 char ifrname[IFNAMSIZ + 1]; 114 char ifrname[IFNAMESIZE + 1];
73 115
74 char *device; 116 char *device;
75 117
76 tap_device (); 118 tap_device ();
77 ~tap_device (); 119 ~tap_device ();
78 120
121 //bool open ();
122 //void close ();
123
79 const char *interface () { return ifrname; } 124 const char *interface () { return ifrname; }
80 const char *info () { return _("Linux tun/tap device"); } 125 const char *info ();
126 const char *if_up ();
81 127
82 tap_packet *recv (); 128 tap_packet *recv ();
83 void send (tap_packet *pkt); 129 void send (tap_packet *pkt);
84}; 130};
85 131
132//extern tap_device *tap_device ();
133
86#endif 134#endif
87 135

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