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Comparing gvpe/src/device.h (file contents):
Revision 1.16 by pcg, Thu Mar 3 07:24:57 2005 UTC vs.
Revision 1.26 by root, Wed Jul 17 16:40:57 2013 UTC

1/* 1/*
2 device.h -- generic header for device.c 2 device.h -- generic header for device.c
3 Copyright (C) 2003-2004 Marc Lehmann <pcg@goof.com> 3 Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de>
4 4
5 This file is part of GVPE.
6
5 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
6 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
7 the Free Software Foundation; either version 2 of the License, or 9 Free Software Foundation; either version 3 of the License, or (at your
8 (at your option) any later version. 10 option) any later version.
9 11
10 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
11 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
13 GNU General Public License for more details. 15 Public License for more details.
14 16
15 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
16 along with this program; if not, write to the Free Software 18 with this program; if not, see <http://www.gnu.org/licenses/>.
17 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.
18*/ 30*/
19 31
20#ifndef VPE_DEVICE_H__ 32#ifndef GVPE_DEVICE_H__
21#define VPE_DEVICE_H__ 33#define GVPE_DEVICE_H__
34
35#include "config.h"
22 36
23#define IFNAMESIZE 256 // be conservative 37#define IFNAMESIZE 256 // be conservative
24
25#include "gettext.h"
26 38
27#include "global.h" 39#include "global.h"
28#include "util.h" 40#include "util.h"
29 41
30struct net_packet { 42struct net_packet
43{
31 u32 len; // actually u16, but padding... 44 u32 len; // actually u16, but padding...
45 // upto 4 bytes at the end might get overwritten when decrypting,
46 // which means len, above, is regularly overwritten with part
47 // of the random prefix when RAND_BYTES=12.
32 48
33 u8 &operator[] (u16 offset) const; 49 u8 &operator[] (u16 offset) const;
34 u8 *at (u16 offset) const; 50 u8 *at (u16 offset) const;
35 51
36 void unshift_hdr (u16 hdrsize) 52 void unshift_hdr (u16 hdrsize)
… …
41 57
42 void skip_hdr (u16 hdrsize) 58 void skip_hdr (u16 hdrsize)
43 { 59 {
44 len -= hdrsize; 60 len -= hdrsize;
45 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); 61 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
62 }
63
64 u16 ipv4_hdr_len () const
65 {
66 return ((*this)[0] & 15) << 2;
46 } 67 }
47 68
48 void set (const net_packet &pkt) 69 void set (const net_packet &pkt)
49 { 70 {
50 len = pkt.len; 71 len = pkt.len;
… …
77 98
78 void *operator new (size_t s); 99 void *operator new (size_t s);
79 void operator delete (void *p); 100 void operator delete (void *p);
80}; 101};
81 102
82struct data_packet : net_packet { 103struct data_packet : net_packet
104{
83 u8 data_[MAXSIZE]; 105 u8 data_[MAXSIZE];
84}; 106};
85 107
86inline 108inline
87u8 &net_packet::operator[] (u16 offset) const 109u8 &net_packet::operator[] (u16 offset) const
88{ 110{
89 return ((data_packet *)this)->data_[offset]; 111 return ((data_packet *)this)->data_[offset];
90} 112}
91 113
92inline 114inline
93u8 *net_packet::at (u16 offset) const 115u8 *net_packet::at (u16 offset) const
94{ 116{
95 return &((*this)[offset]); 117 return &((*this)[offset]);
96} 118}
97 119
98struct tap_packet : net_packet { 120struct tap_packet : net_packet
121{
99 mac dst; 122 mac dst;
100 mac src; 123 mac src;
101 u8 data[MAXSIZE - 12]; 124 u8 data[MAXSIZE - 12];
102}; 125};
103 126
104struct tap_device { 127struct tap_device
128{
105 int fd; 129 int fd;
106 130
107 // network interface name or identifier 131 // network interface name or identifier
108 char ifrname[IFNAMESIZE + 1]; 132 char ifrname[IFNAMESIZE + 1];
109 133
… …
115 //bool open (); 139 //bool open ();
116 //void close (); 140 //void close ();
117 141
118 const char *interface () { return ifrname; } 142 const char *interface () { return ifrname; }
119 const char *info (); 143 const char *info ();
144 const char *if_up ();
120 145
121 tap_packet *recv (); 146 tap_packet *recv ();
122 void send (tap_packet *pkt); 147 void send (tap_packet *pkt);
123}; 148};
124 149

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