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. |
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… | |
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 "config.h" |
23 | #define IFNAMESIZE 256 // be conservative |
23 | |
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24 | #include <cstdlib> |
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25 | #include <cstring> |
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26 | |
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27 | #include <net/if.h> |
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28 | |
24 | |
29 | #include "gettext.h" |
25 | #include "gettext.h" |
30 | |
26 | |
31 | #include "global.h" |
27 | #include "global.h" |
32 | |
28 | |
33 | struct net_packet { |
29 | struct net_packet { |
34 | u32 len; // actually u16, but padding... |
30 | u32 len; // actually u16, but padding... |
35 | |
31 | |
36 | u8 &operator[] (u16 offset); |
32 | u8 &operator[] (u16 offset) const; |
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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 | } |
37 | |
39 | |
38 | void skip_hdr (u16 hdrsize) |
40 | void skip_hdr (u16 hdrsize) |
39 | { |
41 | { |
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42 | len -= hdrsize; |
40 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len -= hdrsize); |
43 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
41 | } |
44 | } |
42 | |
45 | |
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46 | void set (const net_packet &pkt) |
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47 | { |
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48 | len = pkt.len; |
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49 | memcpy (&((*this)[0]), &(pkt[0]), len); |
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50 | } |
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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 | |
43 | bool is_arp () |
68 | bool is_arp () const |
44 | { |
69 | { |
45 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
70 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
46 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
71 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
47 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
72 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
48 | && (*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 |
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55 | struct data_packet : net_packet { |
80 | struct data_packet : net_packet { |
56 | u8 data_[MAXSIZE]; |
81 | u8 data_[MAXSIZE]; |
57 | }; |
82 | }; |
58 | |
83 | |
59 | inline |
84 | inline |
60 | u8 &net_packet::operator[] (u16 offset) |
85 | u8 &net_packet::operator[] (u16 offset) const |
61 | { |
86 | { |
62 | return ((data_packet *)this)->data_[offset]; |
87 | return ((data_packet *)this)->data_[offset]; |
63 | } |
88 | } |
64 | |
89 | |
65 | typedef u8 mac[6]; |
90 | typedef u8 mac[6]; |
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71 | }; |
96 | }; |
72 | |
97 | |
73 | struct tap_device { |
98 | struct tap_device { |
74 | int fd; |
99 | int fd; |
75 | |
100 | |
76 | // linux tuntap |
101 | // network interface name or identifier |
77 | char ifrname[IFNAMSIZ + 1]; |
102 | char ifrname[IFNAMESIZE + 1]; |
78 | |
103 | |
79 | char *device; |
104 | char *device; |
80 | |
105 | |
81 | tap_device (); |
106 | tap_device (); |
82 | ~tap_device (); |
107 | ~tap_device (); |
83 | |
108 | |
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109 | //bool open (); |
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110 | //void close (); |
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111 | |
84 | const char *interface () { return ifrname; } |
112 | const char *interface () { return ifrname; } |
85 | const char *info () { return _("Linux tun/tap device"); } |
113 | const char *info (); |
86 | |
114 | |
87 | tap_packet *recv (); |
115 | tap_packet *recv (); |
88 | void send (tap_packet *pkt); |
116 | void send (tap_packet *pkt); |
89 | }; |
117 | }; |
90 | |
118 | |
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119 | //extern tap_device *tap_device (); |
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120 | |
91 | #endif |
121 | #endif |
92 | |
122 | |