ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/gvpe/src/device.h
(Generate patch)

Comparing gvpe/src/device.h (file contents):
Revision 1.9 by pcg, Tue Oct 14 17:06:21 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.
… …
22#define IFNAMESIZE 256 // be conservative 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) const; 33 u8 &operator[] (u16 offset) const;
34 u8 *at (u16 offset) const;
32 35
33 void unshift_hdr (u16 hdrsize) 36 void unshift_hdr (u16 hdrsize)
34 { 37 {
35 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); 38 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
36 len += hdrsize; 39 len += hdrsize;
… …
46 { 49 {
47 len = pkt.len; 50 len = pkt.len;
48 memcpy (&((*this)[0]), &(pkt[0]), len); 51 memcpy (&((*this)[0]), &(pkt[0]), len);
49 } 52 }
50 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
51 bool is_arp () 70 bool is_arp () const
52 { 71 {
53 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 72 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
54 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 73 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
55 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 74 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
56 && (*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
… …
68u8 &net_packet::operator[] (u16 offset) const 87u8 &net_packet::operator[] (u16 offset) const
69{ 88{
70 return ((data_packet *)this)->data_[offset]; 89 return ((data_packet *)this)->data_[offset];
71} 90}
72 91
73typedef u8 mac[6]; 92inline
93u8 *net_packet::at (u16 offset) const
94{
95 return &((*this)[offset]);
96}
74 97
75struct tap_packet : net_packet { 98struct tap_packet : net_packet {
76 mac dst; 99 mac dst;
77 mac src; 100 mac src;
78 u8 data[MAXSIZE - 12]; 101 u8 data[MAXSIZE - 12];

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines