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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 1.16 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 <net/if.h> 23#define IFNAMESIZE 256 // be conservative
23 24
24#include "gettext.h" 25#include "gettext.h"
25 26
26#include "global.h" 27#include "global.h"
28#include "util.h"
27 29
28struct net_packet { 30struct net_packet {
29 u32 len; // actually u16, but padding... 31 u32 len; // actually u16, but padding...
30 32
31 u8 &operator[] (u16 offset); 33 u8 &operator[] (u16 offset) const;
34 u8 *at (u16 offset) const;
35
36 void unshift_hdr (u16 hdrsize)
37 {
38 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
39 len += hdrsize;
40 }
32 41
33 void skip_hdr (u16 hdrsize) 42 void skip_hdr (u16 hdrsize)
34 { 43 {
44 len -= hdrsize;
35 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 45 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
36 } 46 }
37 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
38 bool is_arp () 70 bool is_arp () const
39 { 71 {
40 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 72 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
41 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 73 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
42 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 74 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
43 && (*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
… …
50struct data_packet : net_packet { 82struct data_packet : net_packet {
51 u8 data_[MAXSIZE]; 83 u8 data_[MAXSIZE];
52}; 84};
53 85
54inline 86inline
55u8 &net_packet::operator[] (u16 offset) 87u8 &net_packet::operator[] (u16 offset) const
56{ 88{
57 return ((data_packet *)this)->data_[offset]; 89 return ((data_packet *)this)->data_[offset];
58} 90}
59 91
60typedef u8 mac[6]; 92inline
93u8 *net_packet::at (u16 offset) const
94{
95 return &((*this)[offset]);
96}
61 97
62struct tap_packet : net_packet { 98struct tap_packet : net_packet {
63 mac dst; 99 mac dst;
64 mac src; 100 mac src;
65 u8 data[MAXSIZE - 12]; 101 u8 data[MAXSIZE - 12];
66}; 102};
67 103
68struct tap_device { 104struct tap_device {
69 int fd; 105 int fd;
70 106
71 // linux tuntap 107 // network interface name or identifier
72 char ifrname[IFNAMSIZ + 1]; 108 char ifrname[IFNAMESIZE + 1];
73 109
74 char *device; 110 char *device;
75 111
76 tap_device (); 112 tap_device ();
77 ~tap_device (); 113 ~tap_device ();
78 114
115 //bool open ();
116 //void close ();
117
79 const char *interface () { return ifrname; } 118 const char *interface () { return ifrname; }
80 const char *info () { return _("Linux tun/tap device"); } 119 const char *info ();
81 120
82 tap_packet *recv (); 121 tap_packet *recv ();
83 void send (tap_packet *pkt); 122 void send (tap_packet *pkt);
84}; 123};
85 124
125//extern tap_device *tap_device ();
126
86#endif 127#endif
87 128

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