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" |
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28 | #include "util.h" |
27 | |
29 | |
28 | struct net_packet { |
30 | struct 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; |
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34 | |
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35 | void unshift_hdr (u16 hdrsize) |
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36 | { |
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37 | memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
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38 | len += hdrsize; |
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39 | } |
32 | |
40 | |
33 | void skip_hdr (u16 hdrsize) |
41 | void skip_hdr (u16 hdrsize) |
34 | { |
42 | { |
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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 | |
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47 | void set (const net_packet &pkt) |
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48 | { |
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49 | len = pkt.len; |
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50 | memcpy (&((*this)[0]), &(pkt[0]), len); |
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51 | } |
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52 | |
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53 | bool is_ipv4 () const |
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54 | { |
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55 | return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP |
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56 | && ((*this)[14] & 0xf0) == 0x40; // IPv4 |
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57 | } |
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58 | |
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59 | u32 &ipv4_src () const |
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60 | { |
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61 | return *(u32 *)&(*this)[26]; |
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62 | } |
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63 | |
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64 | u32 &ipv4_dst () const |
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65 | { |
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66 | return *(u32 *)&(*this)[30]; |
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67 | } |
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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 |
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… | |
50 | struct data_packet : net_packet { |
81 | struct data_packet : net_packet { |
51 | u8 data_[MAXSIZE]; |
82 | u8 data_[MAXSIZE]; |
52 | }; |
83 | }; |
53 | |
84 | |
54 | inline |
85 | inline |
55 | u8 &net_packet::operator[] (u16 offset) |
86 | u8 &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 | |
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60 | typedef u8 mac[6]; |
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61 | |
90 | |
62 | struct tap_packet : net_packet { |
91 | struct 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 | |
68 | struct tap_device { |
97 | struct 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 | |
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74 | char *device; |
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75 | |
102 | |
76 | tap_device (); |
103 | tap_device (); |
77 | ~tap_device (); |
104 | ~tap_device (); |
78 | |
105 | |
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106 | //bool open (); |
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107 | //void close (); |
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108 | |
79 | const char *interface () { return ifrname; } |
109 | const char *interface () { return ifrname; } |
80 | const char *info () { return _("Linux tun/tap device"); } |
110 | const char *info (); |
81 | |
111 | |
82 | tap_packet *recv (); |
112 | tap_packet *recv (); |
83 | void send (tap_packet *pkt); |
113 | void send (tap_packet *pkt); |
84 | }; |
114 | }; |
85 | |
115 | |
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116 | //extern tap_device *tap_device (); |
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117 | |
86 | #endif |
118 | #endif |
87 | |
119 | |