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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 1.10 by pcg, Thu Oct 16 02:28:36 2003 UTC

… …
17*/ 17*/
18 18
19#ifndef VPE_DEVICE_H__ 19#ifndef VPE_DEVICE_H__
20#define VPE_DEVICE_H__ 20#define VPE_DEVICE_H__
21 21
22#include "config.h" 22#define IFNAMESIZE 256 // be conservative
23
24#include <cstdlib>
25#include <cstring>
26
27#include <net/if.h>
28 23
29#include "gettext.h" 24#include "gettext.h"
30 25
31#include "global.h" 26#include "global.h"
32 27
33struct net_packet { 28struct net_packet {
34 u32 len; // actually u16, but padding... 29 u32 len; // actually u16, but padding...
35 30
36 u8 &operator[] (u16 offset); 31 u8 &operator[] (u16 offset) const;
32
33 void unshift_hdr (u16 hdrsize)
34 {
35 memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len);
36 len += hdrsize;
37 }
37 38
38 void skip_hdr (u16 hdrsize) 39 void skip_hdr (u16 hdrsize)
39 { 40 {
41 len -= hdrsize;
40 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); 42 memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len);
41 } 43 }
42 44
45 void set (const net_packet &pkt)
46 {
47 len = pkt.len;
48 memcpy (&((*this)[0]), &(pkt[0]), len);
49 }
50
51 bool is_ipv4 () const
52 {
53 return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP
54 && ((*this)[14] & 0xf0) == 0x40; // IPv4
55 }
56
57 u32 &ipv4_src () const
58 {
59 return *(u32 *)&(*this)[26];
60 }
61
62 u32 &ipv4_dst () const
63 {
64 return *(u32 *)&(*this)[30];
65 }
66
43 bool is_arp () 67 bool is_arp () const
44 { 68 {
45 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol 69 return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol
46 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format 70 && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format
47 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format 71 && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format
48 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len 72 && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len
… …
55struct data_packet : net_packet { 79struct data_packet : net_packet {
56 u8 data_[MAXSIZE]; 80 u8 data_[MAXSIZE];
57}; 81};
58 82
59inline 83inline
60u8 &net_packet::operator[] (u16 offset) 84u8 &net_packet::operator[] (u16 offset) const
61{ 85{
62 return ((data_packet *)this)->data_[offset]; 86 return ((data_packet *)this)->data_[offset];
63} 87}
64 88
65typedef u8 mac[6]; 89typedef u8 mac[6];
… …
71}; 95};
72 96
73struct tap_device { 97struct tap_device {
74 int fd; 98 int fd;
75 99
76 // linux tuntap 100 // network interface name or identifier
77 char ifrname[IFNAMSIZ + 1]; 101 char ifrname[IFNAMESIZE + 1];
78 102
79 char *device; 103 char *device;
80 104
81 tap_device (); 105 tap_device ();
82 ~tap_device (); 106 ~tap_device ();
83 107
108 //bool open ();
109 //void close ();
110
84 const char *interface () { return ifrname; } 111 const char *interface () { return ifrname; }
85 const char *info () { return _("Linux tun/tap device"); } 112 const char *info ();
86 113
87 tap_packet *recv (); 114 tap_packet *recv ();
88 void send (tap_packet *pkt); 115 void send (tap_packet *pkt);
89}; 116};
90 117
118//extern tap_device *tap_device ();
119
91#endif 120#endif
92 121

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