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) 2003-2005 Marc Lehmann <gvpe@schmorp.de> |
3 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
4 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify |
5 | it under the terms of the GNU General Public License as published by |
8 | 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 |
9 | the Free Software Foundation; either version 2 of the License, or |
7 | (at your option) any later version. |
10 | (at your option) any later version. |
8 | |
11 | |
9 | This program is distributed in the hope that it will be useful, |
12 | This program is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
13 | |
16 | |
14 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
15 | along with this program; if not, write to the Free Software |
18 | along with gvpe; if not, write to the Free Software |
16 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | */ |
20 | */ |
18 | |
21 | |
19 | #ifndef VPE_DEVICE_H__ |
22 | #ifndef GVPE_DEVICE_H__ |
20 | #define VPE_DEVICE_H__ |
23 | #define GVPE_DEVICE_H__ |
21 | |
24 | |
22 | #include <net/if.h> |
25 | #include "config.h" |
23 | |
26 | |
24 | #include "gettext.h" |
27 | #define IFNAMESIZE 256 // be conservative |
25 | |
28 | |
26 | #include "global.h" |
29 | #include "global.h" |
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30 | #include "util.h" |
27 | |
31 | |
28 | struct net_packet { |
32 | struct net_packet { |
29 | u32 len; // actually u16, but padding... |
33 | u32 len; // actually u16, but padding... |
30 | |
34 | |
31 | u8 &operator[] (u16 offset) const; |
35 | u8 &operator[] (u16 offset) const; |
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36 | u8 *at (u16 offset) const; |
32 | |
37 | |
33 | void unshift_hdr (u16 hdrsize) |
38 | void unshift_hdr (u16 hdrsize) |
34 | { |
39 | { |
35 | memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
40 | memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
36 | len += hdrsize; |
41 | len += hdrsize; |
… | |
… | |
46 | { |
51 | { |
47 | len = pkt.len; |
52 | len = pkt.len; |
48 | memcpy (&((*this)[0]), &(pkt[0]), len); |
53 | memcpy (&((*this)[0]), &(pkt[0]), len); |
49 | } |
54 | } |
50 | |
55 | |
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56 | bool is_ipv4 () const |
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57 | { |
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58 | return (*this)[12] == 0x08 && (*this)[13] == 0x00 // IP |
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59 | && ((*this)[14] & 0xf0) == 0x40; // IPv4 |
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60 | } |
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61 | |
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62 | u32 &ipv4_src () const |
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63 | { |
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64 | return *(u32 *)&(*this)[26]; |
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65 | } |
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66 | |
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67 | u32 &ipv4_dst () const |
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68 | { |
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69 | return *(u32 *)&(*this)[30]; |
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70 | } |
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71 | |
51 | bool is_arp () |
72 | bool is_arp () const |
52 | { |
73 | { |
53 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
74 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
54 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
75 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
55 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
76 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
56 | && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len |
77 | && (*this)[18] == 0x06 && (*this)[19] == 0x04; // 06 hw_len 04 prot_len |
… | |
… | |
68 | u8 &net_packet::operator[] (u16 offset) const |
89 | u8 &net_packet::operator[] (u16 offset) const |
69 | { |
90 | { |
70 | return ((data_packet *)this)->data_[offset]; |
91 | return ((data_packet *)this)->data_[offset]; |
71 | } |
92 | } |
72 | |
93 | |
73 | typedef u8 mac[6]; |
94 | inline |
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95 | u8 *net_packet::at (u16 offset) const |
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96 | { |
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97 | return &((*this)[offset]); |
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98 | } |
74 | |
99 | |
75 | struct tap_packet : net_packet { |
100 | struct tap_packet : net_packet { |
76 | mac dst; |
101 | mac dst; |
77 | mac src; |
102 | mac src; |
78 | u8 data[MAXSIZE - 12]; |
103 | u8 data[MAXSIZE - 12]; |
79 | }; |
104 | }; |
80 | |
105 | |
81 | struct tap_device { |
106 | struct tap_device { |
82 | int fd; |
107 | int fd; |
83 | |
108 | |
84 | // linux tuntap |
109 | // network interface name or identifier |
85 | char ifrname[IFNAMSIZ + 1]; |
110 | char ifrname[IFNAMESIZE + 1]; |
86 | |
111 | |
87 | char *device; |
112 | char *device; |
88 | |
113 | |
89 | tap_device (); |
114 | tap_device (); |
90 | ~tap_device (); |
115 | ~tap_device (); |
91 | |
116 | |
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117 | //bool open (); |
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118 | //void close (); |
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119 | |
92 | const char *interface () { return ifrname; } |
120 | const char *interface () { return ifrname; } |
93 | const char *info () { return _("Linux tun/tap device"); } |
121 | const char *info (); |
94 | |
122 | |
95 | tap_packet *recv (); |
123 | tap_packet *recv (); |
96 | void send (tap_packet *pkt); |
124 | void send (tap_packet *pkt); |
97 | }; |
125 | }; |
98 | |
126 | |
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127 | //extern tap_device *tap_device (); |
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128 | |
99 | #endif |
129 | #endif |
100 | |
130 | |