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Comparing gvpe/src/device.h (file contents):
Revision 1.2 by pcg, Fri Mar 28 04:05:10 2003 UTC vs.
Revision 1.17 by pcg, Thu Mar 3 16:54:34 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 VPE_DEVICE_H__
20#define VPE_DEVICE_H__ 23#define VPE_DEVICE_H__
21 24
22#include "config.h" 25#define IFNAMESIZE 256 // be conservative
23
24#include <cstdlib>
25#include <cstring>
26
27#include <net/if.h>
28 26
29#include "gettext.h" 27#include "gettext.h"
30 28
31#include "global.h" 29#include "global.h"
30#include "util.h"
32 31
33struct net_packet { 32struct net_packet {
34 u32 len; // actually u16, but padding... 33 u32 len; // actually u16, but padding...
35 34
36 u8 &operator[] (u16 offset); 35 u8 &operator[] (u16 offset) const;
36 u8 *at (u16 offset) const;
37
38 void unshift_hdr (u16 hdrsize)
39 {
40 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
41 len += hdrsize;
42 }
37 43
38 void skip_hdr (u16 hdrsize) 44 void skip_hdr (u16 hdrsize)
39 { 45 {
46 len -= hdrsize;
40 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 47 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
41 } 48 }
42 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
43 bool is_arp () 72 bool is_arp () const
44 { 73 {
45 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 74 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
46 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 75 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
47 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 76 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
48 && (*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
… …
55struct data_packet : net_packet { 84struct data_packet : net_packet {
56 u8 data_[MAXSIZE]; 85 u8 data_[MAXSIZE];
57}; 86};
58 87
59inline 88inline
60u8 &net_packet::operator[] (u16 offset) 89u8 &net_packet::operator[] (u16 offset) const
61{ 90{
62 return ((data_packet *)this)->data_[offset]; 91 return ((data_packet *)this)->data_[offset];
63} 92}
64 93
65typedef u8 mac[6]; 94inline
95u8 *net_packet::at (u16 offset) const
96{
97 return &((*this)[offset]);
98}
66 99
67struct tap_packet : net_packet { 100struct tap_packet : net_packet {
68 mac dst; 101 mac dst;
69 mac src; 102 mac src;
70 u8 data[MAXSIZE - 12]; 103 u8 data[MAXSIZE - 12];
71}; 104};
72 105
73struct tap_device { 106struct tap_device {
74 int fd; 107 int fd;
75 108
76 // linux tuntap 109 // network interface name or identifier
77 char ifrname[IFNAMSIZ + 1]; 110 char ifrname[IFNAMESIZE + 1];
78 111
79 char *device; 112 char *device;
80 113
81 tap_device (); 114 tap_device ();
82 ~tap_device (); 115 ~tap_device ();
83 116
117 //bool open ();
118 //void close ();
119
84 const char *interface () { return ifrname; } 120 const char *interface () { return ifrname; }
85 const char *info () { return _("Linux tun/tap device"); } 121 const char *info ();
86 122
87 tap_packet *recv (); 123 tap_packet *recv ();
88 void send (tap_packet *pkt); 124 void send (tap_packet *pkt);
89}; 125};
90 126
127//extern tap_device *tap_device ();
128
91#endif 129#endif
92 130

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