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Comparing gvpe/src/device.h (file contents):
Revision 1.4 by pcg, Sun Apr 6 20:01:52 2003 UTC vs.
Revision 1.24 by root, Fri Sep 16 17:59:46 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) const; 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);
59 }
60
61 void skip_ipv4_hdr (u16 extra = 0)
62 {
63 skip_hdr ((((*this)[0] & 15) << 2) + extra);
36 } 64 }
37 65
38 void set (const net_packet &pkt) 66 void set (const net_packet &pkt)
39 { 67 {
40 len = pkt.len; 68 len = pkt.len;
41 memcpy (&((*this)[0]), &(pkt[0]), len); 69 memcpy (&((*this)[0]), &(pkt[0]), len);
42 } 70 }
43 71
72 bool is_ipv4 () const
73 {
74 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
75 && ((*this)[14] & 0xf0) == 0x40; // IPv4
76 }
77
78 u32 &ipv4_src () const
79 {
80 return *(u32 *)&(*this)[26];
81 }
82
83 u32 &ipv4_dst () const
84 {
85 return *(u32 *)&(*this)[30];
86 }
87
44 bool is_arp () 88 bool is_arp () const
45 { 89 {
46 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 90 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
47 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 91 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
48 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 92 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
49 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 93 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
51 95
52 void *operator new (size_t s); 96 void *operator new (size_t s);
53 void operator delete (void *p); 97 void operator delete (void *p);
54}; 98};
55 99
56struct data_packet : net_packet { 100struct data_packet : net_packet
101{
57 u8 data_[MAXSIZE]; 102 u8 data_[MAXSIZE];
58}; 103};
59 104
60inline 105inline
61u8 &net_packet::operator[] (u16 offset) const 106u8 &net_packet::operator[] (u16 offset) const
62{ 107{
63 return ((data_packet *)this)->data_[offset]; 108 return ((data_packet *)this)->data_[offset];
64} 109}
65 110
66typedef u8 mac[6]; 111inline
112u8 *net_packet::at (u16 offset) const
113{
114 return &((*this)[offset]);
115}
67 116
68struct tap_packet : net_packet { 117struct tap_packet : net_packet
118{
69 mac dst; 119 mac dst;
70 mac src; 120 mac src;
71 u8 data[MAXSIZE - 12]; 121 u8 data[MAXSIZE - 12];
72}; 122};
73 123
74struct tap_device { 124struct tap_device
125{
75 int fd; 126 int fd;
76 127
77 // linux tuntap 128 // network interface name or identifier
78 char ifrname[IFNAMSIZ + 1]; 129 char ifrname[IFNAMESIZE + 1];
79 130
80 char *device; 131 char *device;
81 132
82 tap_device (); 133 tap_device ();
83 ~tap_device (); 134 ~tap_device ();
84 135
136 //bool open ();
137 //void close ();
138
85 const char *interface () { return ifrname; } 139 const char *interface () { return ifrname; }
86 const char *info () { return _("Linux tun/tap device"); } 140 const char *info ();
141 const char *if_up ();
87 142
88 tap_packet *recv (); 143 tap_packet *recv ();
89 void send (tap_packet *pkt); 144 void send (tap_packet *pkt);
90}; 145};
91 146
147//extern tap_device *tap_device ();
148
92#endif 149#endif
93 150

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