| 1 | /* |
1 | /* |
| 2 | device.h -- generic header for device.c |
2 | device.h -- generic header for device.c |
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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" |
| 27 | |
28 | |
| 28 | struct net_packet { |
29 | struct net_packet { |
| 29 | u32 len; // actually u16, but padding... |
30 | u32 len; // actually u16, but padding... |
| 30 | |
31 | |
| 31 | u8 &operator[] (u16 offset) const; |
32 | u8 &operator[] (u16 offset) const; |
| 32 | |
33 | |
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34 | void unshift_hdr (u16 hdrsize) |
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35 | { |
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36 | memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
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37 | len += hdrsize; |
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38 | } |
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39 | |
| 33 | void skip_hdr (u16 hdrsize) |
40 | void skip_hdr (u16 hdrsize) |
| 34 | { |
41 | { |
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42 | len -= hdrsize; |
| 35 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); |
43 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
| 36 | } |
44 | } |
| 37 | |
45 | |
| 38 | void set (const net_packet &pkt) |
46 | void set (const net_packet &pkt) |
| 39 | { |
47 | { |
| 40 | len = pkt.len; |
48 | len = pkt.len; |
| 41 | memcpy (&((*this)[0]), &(pkt[0]), len); |
49 | memcpy (&((*this)[0]), &(pkt[0]), len); |
| 42 | } |
50 | } |
| 43 | |
51 | |
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52 | bool is_ipv4 () const |
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53 | { |
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54 | return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP |
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55 | && ((*this)[14] & 0xf0) == 0x40; // IPv4 |
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56 | } |
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57 | |
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58 | u32 &ipv4_src () const |
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59 | { |
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60 | return *(u32 *)&(*this)[26]; |
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61 | } |
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62 | |
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63 | u32 &ipv4_dst () const |
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64 | { |
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65 | return *(u32 *)&(*this)[30]; |
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66 | } |
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67 | |
| 44 | bool is_arp () |
68 | bool is_arp () const |
| 45 | { |
69 | { |
| 46 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
70 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
| 47 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
71 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
| 48 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
72 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
| 49 | && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len |
73 | && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len |
| … | |
… | |
| 72 | }; |
96 | }; |
| 73 | |
97 | |
| 74 | struct tap_device { |
98 | struct tap_device { |
| 75 | int fd; |
99 | int fd; |
| 76 | |
100 | |
| 77 | // linux tuntap |
101 | // network interface name or identifier |
| 78 | char ifrname[IFNAMSIZ + 1]; |
102 | char ifrname[IFNAMESIZE + 1]; |
| 79 | |
103 | |
| 80 | char *device; |
104 | char *device; |
| 81 | |
105 | |
| 82 | tap_device (); |
106 | tap_device (); |
| 83 | ~tap_device (); |
107 | ~tap_device (); |
| 84 | |
108 | |
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109 | //bool open (); |
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110 | //void close (); |
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111 | |
| 85 | const char *interface () { return ifrname; } |
112 | const char *interface () { return ifrname; } |
| 86 | const char *info () { return _("Linux tun/tap device"); } |
113 | const char *info (); |
| 87 | |
114 | |
| 88 | tap_packet *recv (); |
115 | tap_packet *recv (); |
| 89 | void send (tap_packet *pkt); |
116 | void send (tap_packet *pkt); |
| 90 | }; |
117 | }; |
| 91 | |
118 | |
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119 | //extern tap_device *tap_device (); |
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120 | |
| 92 | #endif |
121 | #endif |
| 93 | |
122 | |
