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Comparing gvpe/src/device.h (file contents):
Revision 1.5 by pcg, Tue Apr 8 02:00:54 2003 UTC vs.
Revision 1.19 by pcg, Wed Mar 23 21:55:39 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 <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 {
29 u32 len; // actually u16, but padding... 33 u32 len; // actually u16, but padding...
30 34
31 u8 &operator[] (u16 offset) const; 35 u8 &operator[] (u16 offset) const;
36 u8 *at (u16 offset) const;
32 37
33 void unshift_hdr (u16 hdrsize) 38 void unshift_hdr (u16 hdrsize)
34 { 39 {
35 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); 40 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
36 len += hdrsize; 41 len += hdrsize;
… …
46 { 51 {
47 len = pkt.len; 52 len = pkt.len;
48 memcpy (&((*this)[0]), &(pkt[0]), len); 53 memcpy (&((*this)[0]), &(pkt[0]), len);
49 } 54 }
50 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
51 bool is_arp () 72 bool is_arp () const
52 { 73 {
53 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 74 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
54 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 75 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
55 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 76 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
56 && (*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
… …
68u8 &net_packet::operator[] (u16 offset) const 89u8 &net_packet::operator[] (u16 offset) const
69{ 90{
70 return ((data_packet *)this)->data_[offset]; 91 return ((data_packet *)this)->data_[offset];
71} 92}
72 93
73typedef u8 mac[6]; 94inline
95u8 *net_packet::at (u16 offset) const
96{
97 return &((*this)[offset]);
98}
74 99
75struct tap_packet : net_packet { 100struct tap_packet : net_packet {
76 mac dst; 101 mac dst;
77 mac src; 102 mac src;
78 u8 data[MAXSIZE - 12]; 103 u8 data[MAXSIZE - 12];
79}; 104};
80 105
81struct tap_device { 106struct tap_device {
82 int fd; 107 int fd;
83 108
84 // linux tuntap 109 // network interface name or identifier
85 char ifrname[IFNAMSIZ + 1]; 110 char ifrname[IFNAMESIZE + 1];
86 111
87 char *device; 112 char *device;
88 113
89 tap_device (); 114 tap_device ();
90 ~tap_device (); 115 ~tap_device ();
91 116
117 //bool open ();
118 //void close ();
119
92 const char *interface () { return ifrname; } 120 const char *interface () { return ifrname; }
93 const char *info () { return _("Linux tun/tap device"); } 121 const char *info ();
122 const char *if_up ();
94 123
95 tap_packet *recv (); 124 tap_packet *recv ();
96 void send (tap_packet *pkt); 125 void send (tap_packet *pkt);
97}; 126};
98 127
128//extern tap_device *tap_device ();
129
99#endif 130#endif
100 131

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