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/cvs/gvpe/src/device.h
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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 1.11 by pcg, Thu Oct 16 02:41:21 2003 UTC

1/* 1/*
2 device.h -- generic header for device.c 2 device.h -- generic header for device.c
3 Copyright (C) 2003 Marc Lehmann <pcg@goof.com>
3 4
4 This program is free software; you can redistribute it and/or modify 5 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by 6 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 7 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version. 8 (at your option) any later version.
… …
17*/ 18*/
18 19
19#ifndef VPE_DEVICE_H__ 20#ifndef VPE_DEVICE_H__
20#define VPE_DEVICE_H__ 21#define VPE_DEVICE_H__
21 22
22#include "config.h" 23#define IFNAMESIZE 256 // be conservative
23
24#include <cstdlib>
25#include <cstring>
26
27#include <net/if.h>
28 24
29#include "gettext.h" 25#include "gettext.h"
30 26
31#include "global.h" 27#include "global.h"
32 28
33struct net_packet { 29struct net_packet {
34 u32 len; // actually u16, but padding... 30 u32 len; // actually u16, but padding...
35 31
36 u8 &operator[] (u16 offset); 32 u8 &operator[] (u16 offset) const;
33
34 void unshift_hdr (u16 hdrsize)
35 {
36 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
37 len += hdrsize;
38 }
37 39
38 void skip_hdr (u16 hdrsize) 40 void skip_hdr (u16 hdrsize)
39 { 41 {
42 len -= hdrsize;
40 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 43 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
41 } 44 }
42 45
46 void set (const net_packet &pkt)
47 {
48 len = pkt.len;
49 memcpy (&((*this)[0]), &(pkt[0]), len);
50 }
51
52 bool is_ipv4 () const
53 {
54 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
55 && ((*this)[14] & 0xf0) == 0x40; // IPv4
56 }
57
58 u32 &ipv4_src () const
59 {
60 return *(u32 *)&(*this)[26];
61 }
62
63 u32 &ipv4_dst () const
64 {
65 return *(u32 *)&(*this)[30];
66 }
67
43 bool is_arp () 68 bool is_arp () const
44 { 69 {
45 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 70 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
46 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 71 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
47 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 72 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
48 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 73 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
55struct data_packet : net_packet { 80struct data_packet : net_packet {
56 u8 data_[MAXSIZE]; 81 u8 data_[MAXSIZE];
57}; 82};
58 83
59inline 84inline
60u8 &net_packet::operator[] (u16 offset) 85u8 &net_packet::operator[] (u16 offset) const
61{ 86{
62 return ((data_packet *)this)->data_[offset]; 87 return ((data_packet *)this)->data_[offset];
63} 88}
64 89
65typedef u8 mac[6]; 90typedef u8 mac[6];
… …
71}; 96};
72 97
73struct tap_device { 98struct tap_device {
74 int fd; 99 int fd;
75 100
76 // linux tuntap 101 // network interface name or identifier
77 char ifrname[IFNAMSIZ + 1]; 102 char ifrname[IFNAMESIZE + 1];
78 103
79 char *device; 104 char *device;
80 105
81 tap_device (); 106 tap_device ();
82 ~tap_device (); 107 ~tap_device ();
83 108
109 //bool open ();
110 //void close ();
111
84 const char *interface () { return ifrname; } 112 const char *interface () { return ifrname; }
85 const char *info () { return _("Linux tun/tap device"); } 113 const char *info ();
86 114
87 tap_packet *recv (); 115 tap_packet *recv ();
88 void send (tap_packet *pkt); 116 void send (tap_packet *pkt);
89}; 117};
90 118
119//extern tap_device *tap_device ();
120
91#endif 121#endif
92 122

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