| 1 | /* |
1 | /* |
| 2 | device.h -- generic header for device.c |
2 | device.h -- generic header for device.c |
| 3 | Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> |
| 4 | |
4 | |
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5 | This file is part of GVPE. |
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6 | |
| 5 | This program is free software; you can redistribute it and/or modify |
7 | GVPE is free software; you can redistribute it and/or modify it |
| 6 | it under the terms of the GNU General Public License as published by |
8 | under the terms of the GNU General Public License as published by the |
| 7 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
| 8 | (at your option) any later version. |
10 | option) any later version. |
| 9 | |
11 | |
| 10 | 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, but |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| 13 | GNU General Public License for more details. |
15 | Public License for more details. |
| 14 | |
16 | |
| 15 | 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 along |
| 16 | along with this program; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
| 17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | |
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20 | Additional permission under GNU GPL version 3 section 7 |
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21 | |
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22 | If you modify this Program, or any covered work, by linking or |
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23 | combining it with the OpenSSL project's OpenSSL library (or a modified |
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24 | version of that library), containing parts covered by the terms of the |
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25 | OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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26 | additional permission to convey the resulting work. Corresponding |
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27 | Source for a non-source form of such a combination shall include the |
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28 | source code for the parts of OpenSSL used as well as that of the |
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29 | covered work. |
| 18 | */ |
30 | */ |
| 19 | |
31 | |
| 20 | #ifndef VPE_DEVICE_H__ |
32 | #ifndef GVPE_DEVICE_H__ |
| 21 | #define VPE_DEVICE_H__ |
33 | #define GVPE_DEVICE_H__ |
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34 | |
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35 | #include "config.h" |
| 22 | |
36 | |
| 23 | #define IFNAMESIZE 256 // be conservative |
37 | #define IFNAMESIZE 256 // be conservative |
| 24 | |
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| 25 | #include "gettext.h" |
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| 26 | |
38 | |
| 27 | #include "global.h" |
39 | #include "global.h" |
| 28 | #include "util.h" |
40 | #include "util.h" |
| 29 | |
41 | |
| 30 | struct net_packet { |
42 | struct net_packet |
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43 | { |
| 31 | u32 len; // actually u16, but padding... |
44 | u32 len; // actually u16, but padding... |
| 32 | |
45 | |
| 33 | u8 &operator[] (u16 offset) const; |
46 | u8 &operator[] (u16 offset) const; |
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47 | u8 *at (u16 offset) const; |
| 34 | |
48 | |
| 35 | void unshift_hdr (u16 hdrsize) |
49 | void unshift_hdr (u16 hdrsize) |
| 36 | { |
50 | { |
| 37 | memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
51 | memmove ((void *)&(*this)[hdrsize], (void *)&(*this)[0], len); |
| 38 | len += hdrsize; |
52 | len += hdrsize; |
| … | |
… | |
| 40 | |
54 | |
| 41 | void skip_hdr (u16 hdrsize) |
55 | void skip_hdr (u16 hdrsize) |
| 42 | { |
56 | { |
| 43 | len -= hdrsize; |
57 | len -= hdrsize; |
| 44 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
58 | memmove ((void *)&(*this)[0], (void *)&(*this)[hdrsize], len); |
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59 | } |
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60 | |
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61 | u16 ipv4_hdr_len () const |
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62 | { |
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63 | return ((*this)[0] & 15) << 2; |
| 45 | } |
64 | } |
| 46 | |
65 | |
| 47 | void set (const net_packet &pkt) |
66 | void set (const net_packet &pkt) |
| 48 | { |
67 | { |
| 49 | len = pkt.len; |
68 | len = pkt.len; |
| … | |
… | |
| 76 | |
95 | |
| 77 | void *operator new (size_t s); |
96 | void *operator new (size_t s); |
| 78 | void operator delete (void *p); |
97 | void operator delete (void *p); |
| 79 | }; |
98 | }; |
| 80 | |
99 | |
| 81 | struct data_packet : net_packet { |
100 | struct data_packet : net_packet |
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101 | { |
| 82 | u8 data_[MAXSIZE]; |
102 | u8 data_[MAXSIZE]; |
| 83 | }; |
103 | }; |
| 84 | |
104 | |
| 85 | inline |
105 | inline |
| 86 | u8 &net_packet::operator[] (u16 offset) const |
106 | u8 &net_packet::operator[] (u16 offset) const |
| 87 | { |
107 | { |
| 88 | return ((data_packet *)this)->data_[offset]; |
108 | return ((data_packet *)this)->data_[offset]; |
| 89 | } |
109 | } |
| 90 | |
110 | |
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111 | inline |
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112 | u8 *net_packet::at (u16 offset) const |
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113 | { |
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114 | return &((*this)[offset]); |
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115 | } |
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116 | |
| 91 | struct tap_packet : net_packet { |
117 | struct tap_packet : net_packet |
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118 | { |
| 92 | mac dst; |
119 | mac dst; |
| 93 | mac src; |
120 | mac src; |
| 94 | u8 data[MAXSIZE - 12]; |
121 | u8 data[MAXSIZE - 12]; |
| 95 | }; |
122 | }; |
| 96 | |
123 | |
| 97 | struct tap_device { |
124 | struct tap_device |
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125 | { |
| 98 | int fd; |
126 | int fd; |
| 99 | |
127 | |
| 100 | // network interface name or identifier |
128 | // network interface name or identifier |
| 101 | char ifrname[IFNAMESIZE + 1]; |
129 | char ifrname[IFNAMESIZE + 1]; |
| 102 | |
130 | |
| … | |
… | |
| 108 | //bool open (); |
136 | //bool open (); |
| 109 | //void close (); |
137 | //void close (); |
| 110 | |
138 | |
| 111 | const char *interface () { return ifrname; } |
139 | const char *interface () { return ifrname; } |
| 112 | const char *info (); |
140 | const char *info (); |
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141 | const char *if_up (); |
| 113 | |
142 | |
| 114 | tap_packet *recv (); |
143 | tap_packet *recv (); |
| 115 | void send (tap_packet *pkt); |
144 | void send (tap_packet *pkt); |
| 116 | }; |
145 | }; |
| 117 | |
146 | |
