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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 1.23 by root, Tue Feb 8 23:13:48 2011 UTC

1/* 1/*
2 device.h -- generic header for device.c 2 device.h -- generic header for device.c
3 Copyright (C) 2003-2008 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 it
5 it under the terms of the GNU General Public License as published by 8 under the terms of the GNU General Public License as published by the
6 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
7 (at your option) any later version. 10 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, but
10 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 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 GNU General
12 GNU General Public License for more details. 15 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 along
15 along with this program; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
16 Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19
20 Additional permission under GNU GPL version 3 section 7
21
22 If you modify this Program, or any covered work, by linking or
23 combining it with the OpenSSL project's OpenSSL library (or a modified
24 version of that library), containing parts covered by the terms of the
25 OpenSSL or SSLeay licenses, the licensors of this Program grant you
26 additional permission to convey the resulting work. Corresponding
27 Source for a non-source form of such a combination shall include the
28 source code for the parts of OpenSSL used as well as that of the
29 covered work.
17*/ 30*/
18 31
19#ifndef VPE_DEVICE_H__ 32#ifndef GVPE_DEVICE_H__
20#define VPE_DEVICE_H__ 33#define GVPE_DEVICE_H__
21 34
22#include <net/if.h> 35#include "config.h"
23 36
24#include "gettext.h" 37#define IFNAMESIZE 256 // be conservative
25 38
26#include "global.h" 39#include "global.h"
40#include "util.h"
27 41
28struct net_packet { 42struct net_packet
43{
29 u32 len; // actually u16, but padding... 44 u32 len; // actually u16, but padding...
30 45
31 u8 &operator[] (u16 offset); 46 u8 &operator[] (u16 offset) const;
47 u8 *at (u16 offset) const;
48
49 void unshift_hdr (u16 hdrsize)
50 {
51 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
52 len += hdrsize;
53 }
32 54
33 void skip_hdr (u16 hdrsize) 55 void skip_hdr (u16 hdrsize)
34 { 56 {
57 len -= hdrsize;
35 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 58 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
36 } 59 }
37 60
61 void set (const net_packet &pkt)
62 {
63 len = pkt.len;
64 memcpy (&((*this)[0]), &(pkt[0]), len);
65 }
66
67 bool is_ipv4 () const
68 {
69 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
70 && ((*this)[14] & 0xf0) == 0x40; // IPv4
71 }
72
73 u32 &ipv4_src () const
74 {
75 return *(u32 *)&(*this)[26];
76 }
77
78 u32 &ipv4_dst () const
79 {
80 return *(u32 *)&(*this)[30];
81 }
82
38 bool is_arp () 83 bool is_arp () const
39 { 84 {
40 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 85 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
41 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 86 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
42 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 87 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
43 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 88 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
45 90
46 void *operator new (size_t s); 91 void *operator new (size_t s);
47 void operator delete (void *p); 92 void operator delete (void *p);
48}; 93};
49 94
50struct data_packet : net_packet { 95struct data_packet : net_packet
96{
51 u8 data_[MAXSIZE]; 97 u8 data_[MAXSIZE];
52}; 98};
53 99
54inline 100inline
55u8 &net_packet::operator[] (u16 offset) 101u8 &net_packet::operator[] (u16 offset) const
56{ 102{
57 return ((data_packet *)this)->data_[offset]; 103 return ((data_packet *)this)->data_[offset];
58} 104}
59 105
60typedef u8 mac[6]; 106inline
107u8 *net_packet::at (u16 offset) const
108{
109 return &((*this)[offset]);
110}
61 111
62struct tap_packet : net_packet { 112struct tap_packet : net_packet
113{
63 mac dst; 114 mac dst;
64 mac src; 115 mac src;
65 u8 data[MAXSIZE - 12]; 116 u8 data[MAXSIZE - 12];
66}; 117};
67 118
68struct tap_device { 119struct tap_device
120{
69 int fd; 121 int fd;
70 122
71 // linux tuntap 123 // network interface name or identifier
72 char ifrname[IFNAMSIZ + 1]; 124 char ifrname[IFNAMESIZE + 1];
73 125
74 char *device; 126 char *device;
75 127
76 tap_device (); 128 tap_device ();
77 ~tap_device (); 129 ~tap_device ();
78 130
131 //bool open ();
132 //void close ();
133
79 const char *interface () { return ifrname; } 134 const char *interface () { return ifrname; }
80 const char *info () { return _("Linux tun/tap device"); } 135 const char *info ();
136 const char *if_up ();
81 137
82 tap_packet *recv (); 138 tap_packet *recv ();
83 void send (tap_packet *pkt); 139 void send (tap_packet *pkt);
84}; 140};
85 141
142//extern tap_device *tap_device ();
143
86#endif 144#endif
87 145

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