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Comparing gvpe/src/device.h (file contents):
Revision 1.1 by pcg, Sat Mar 1 15:53:03 2003 UTC vs.
Revision 1.18 by pcg, Fri Mar 18 01:53:05 2005 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. 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 "config.h" 25#include "config.h"
23 26
24#include <cstdlib> 27#define IFNAMESIZE 256 // be conservative
25
26#include <net/if.h>
27
28#include "gettext.h"
29 28
30#include "global.h" 29#include "global.h"
30#include "util.h"
31 31
32struct net_packet { 32struct net_packet {
33 u32 len; // actually u16, but padding... 33 u32 len; // actually u16, but padding...
34 34
35 u8 &operator[] (u16 offset); 35 u8 &operator[] (u16 offset) const;
36 u8 *at (u16 offset) const;
36 37
38 void unshift_hdr (u16 hdrsize)
39 {
40 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
41 len += hdrsize;
42 }
43
44 void skip_hdr (u16 hdrsize)
45 {
46 len -= hdrsize;
47 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
48 }
49
50 void set (const net_packet &pkt)
51 {
52 len = pkt.len;
53 memcpy (&((*this)[0]), &(pkt[0]), len);
54 }
55
56 bool is_ipv4 () const
57 {
58 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
59 && ((*this)[14] & 0xf0) == 0x40; // IPv4
60 }
61
62 u32 &ipv4_src () const
63 {
64 return *(u32 *)&(*this)[26];
65 }
66
67 u32 &ipv4_dst () const
68 {
69 return *(u32 *)&(*this)[30];
70 }
71
37 bool is_arp () 72 bool is_arp () const
38 { 73 {
39 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 74 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
40 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 75 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
41 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 76 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
42 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 77 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
49struct data_packet : net_packet { 84struct data_packet : net_packet {
50 u8 data_[MAXSIZE]; 85 u8 data_[MAXSIZE];
51}; 86};
52 87
53inline 88inline
54u8 &net_packet::operator[] (u16 offset) 89u8 &net_packet::operator[] (u16 offset) const
55{ 90{
56 return ((data_packet *)this)->data_[offset]; 91 return ((data_packet *)this)->data_[offset];
57} 92}
58 93
59typedef u8 mac[6]; 94inline
95u8 *net_packet::at (u16 offset) const
96{
97 return &((*this)[offset]);
98}
60 99
61struct tap_packet : net_packet { 100struct tap_packet : net_packet {
62 mac dst; 101 mac dst;
63 mac src; 102 mac src;
64 u8 data[MAXSIZE - 12]; 103 u8 data[MAXSIZE - 12];
65}; 104};
66 105
67struct tap_device { 106struct tap_device {
68 int fd; 107 int fd;
69 108
70 // linux tuntap 109 // network interface name or identifier
71 char ifrname[IFNAMSIZ + 1]; 110 char ifrname[IFNAMESIZE + 1];
72 111
73 char *device; 112 char *device;
74 113
75 tap_device (); 114 tap_device ();
76 ~tap_device (); 115 ~tap_device ();
77 116
117 //bool open ();
118 //void close ();
119
78 const char *interface () { return ifrname; } 120 const char *interface () { return ifrname; }
79 const char *info () { return _("Linux tun/tap device"); } 121 const char *info ();
80 122
81 tap_packet *recv (); 123 tap_packet *recv ();
82 void send (tap_packet *pkt); 124 void send (tap_packet *pkt);
83}; 125};
84 126
127//extern tap_device *tap_device ();
128
85#endif 129#endif
86 130

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