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Comparing gvpe/src/device.h (file contents):
Revision 1.1 by pcg, Sat Mar 1 15:53:03 2003 UTC vs.
Revision 1.16 by pcg, Thu Mar 3 07:24:57 2005 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 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
26#include <net/if.h>
27 24
28#include "gettext.h" 25#include "gettext.h"
29 26
30#include "global.h" 27#include "global.h"
28#include "util.h"
31 29
32struct net_packet { 30struct net_packet {
33 u32 len; // actually u16, but padding... 31 u32 len; // actually u16, but padding...
34 32
35 u8 &operator[] (u16 offset); 33 u8 &operator[] (u16 offset) const;
34 u8 *at (u16 offset) const;
36 35
36 void unshift_hdr (u16 hdrsize)
37 {
38 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
39 len += hdrsize;
40 }
41
42 void skip_hdr (u16 hdrsize)
43 {
44 len -= hdrsize;
45 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
46 }
47
48 void set (const net_packet &pkt)
49 {
50 len = pkt.len;
51 memcpy (&((*this)[0]), &(pkt[0]), len);
52 }
53
54 bool is_ipv4 () const
55 {
56 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
57 && ((*this)[14] & 0xf0) == 0x40; // IPv4
58 }
59
60 u32 &ipv4_src () const
61 {
62 return *(u32 *)&(*this)[26];
63 }
64
65 u32 &ipv4_dst () const
66 {
67 return *(u32 *)&(*this)[30];
68 }
69
37 bool is_arp () 70 bool is_arp () const
38 { 71 {
39 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 72 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
40 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 73 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
41 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 74 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
42 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 75 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
49struct data_packet : net_packet { 82struct data_packet : net_packet {
50 u8 data_[MAXSIZE]; 83 u8 data_[MAXSIZE];
51}; 84};
52 85
53inline 86inline
54u8 &net_packet::operator[] (u16 offset) 87u8 &net_packet::operator[] (u16 offset) const
55{ 88{
56 return ((data_packet *)this)->data_[offset]; 89 return ((data_packet *)this)->data_[offset];
57} 90}
58 91
59typedef u8 mac[6]; 92inline
93u8 *net_packet::at (u16 offset) const
94{
95 return &((*this)[offset]);
96}
60 97
61struct tap_packet : net_packet { 98struct tap_packet : net_packet {
62 mac dst; 99 mac dst;
63 mac src; 100 mac src;
64 u8 data[MAXSIZE - 12]; 101 u8 data[MAXSIZE - 12];
65}; 102};
66 103
67struct tap_device { 104struct tap_device {
68 int fd; 105 int fd;
69 106
70 // linux tuntap 107 // network interface name or identifier
71 char ifrname[IFNAMSIZ + 1]; 108 char ifrname[IFNAMESIZE + 1];
72 109
73 char *device; 110 char *device;
74 111
75 tap_device (); 112 tap_device ();
76 ~tap_device (); 113 ~tap_device ();
77 114
115 //bool open ();
116 //void close ();
117
78 const char *interface () { return ifrname; } 118 const char *interface () { return ifrname; }
79 const char *info () { return _("Linux tun/tap device"); } 119 const char *info ();
80 120
81 tap_packet *recv (); 121 tap_packet *recv ();
82 void send (tap_packet *pkt); 122 void send (tap_packet *pkt);
83}; 123};
84 124
125//extern tap_device *tap_device ();
126
85#endif 127#endif
86 128

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