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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 1.12 by pcg, Thu Oct 16 14:12:00 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 <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
35 void unshift_hdr (u16 hdrsize)
36 {
37 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
38 len += hdrsize;
39 }
32 40
33 void skip_hdr (u16 hdrsize) 41 void skip_hdr (u16 hdrsize)
34 { 42 {
43 len -= hdrsize;
35 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 44 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
36 } 45 }
37 46
47 void set (const net_packet &pkt)
48 {
49 len = pkt.len;
50 memcpy (&((*this)[0]), &(pkt[0]), len);
51 }
52
53 bool is_ipv4 () const
54 {
55 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
56 && ((*this)[14] & 0xf0) == 0x40; // IPv4
57 }
58
59 u32 &ipv4_src () const
60 {
61 return *(u32 *)&(*this)[26];
62 }
63
64 u32 &ipv4_dst () const
65 {
66 return *(u32 *)&(*this)[30];
67 }
68
38 bool is_arp () 69 bool is_arp () const
39 { 70 {
40 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 71 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
41 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 72 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
42 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 73 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
43 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 74 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
50struct data_packet : net_packet { 81struct data_packet : net_packet {
51 u8 data_[MAXSIZE]; 82 u8 data_[MAXSIZE];
52}; 83};
53 84
54inline 85inline
55u8 &net_packet::operator[] (u16 offset) 86u8 &net_packet::operator[] (u16 offset) const
56{ 87{
57 return ((data_packet *)this)->data_[offset]; 88 return ((data_packet *)this)->data_[offset];
58} 89}
59
60typedef u8 mac[6];
61 90
62struct tap_packet : net_packet { 91struct tap_packet : net_packet {
63 mac dst; 92 mac dst;
64 mac src; 93 mac src;
65 u8 data[MAXSIZE - 12]; 94 u8 data[MAXSIZE - 12];
66}; 95};
67 96
68struct tap_device { 97struct tap_device {
69 int fd; 98 int fd;
70 99
71 // linux tuntap 100 // network interface name or identifier
72 char ifrname[IFNAMSIZ + 1]; 101 char ifrname[IFNAMESIZE + 1];
73 102
74 char *device; 103 char *device;
75 104
76 tap_device (); 105 tap_device ();
77 ~tap_device (); 106 ~tap_device ();
78 107
108 //bool open ();
109 //void close ();
110
79 const char *interface () { return ifrname; } 111 const char *interface () { return ifrname; }
80 const char *info () { return _("Linux tun/tap device"); } 112 const char *info ();
81 113
82 tap_packet *recv (); 114 tap_packet *recv ();
83 void send (tap_packet *pkt); 115 void send (tap_packet *pkt);
84}; 116};
85 117
118//extern tap_device *tap_device ();
119
86#endif 120#endif
87 121

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