| 1 | /* |
1 | /* |
| 2 | ether_emu.C -- ethernet "emulator" library |
2 | ether_emu.C -- ethernet "emulator" library |
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3 | Copyright (C) 2003-2008 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 it |
| 5 | 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 |
| 6 | the Free Software Foundation; either version 2 of the License, or |
9 | Free Software Foundation; either version 3 of the License, or (at your |
| 7 | (at your option) any later version. |
10 | 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, but |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | 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 GNU General |
| 12 | GNU General Public License for more details. |
15 | 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 along |
| 15 | along with this program; if not, write to the Free Software |
18 | with this program; if not, see <http://www.gnu.org/licenses/>. |
| 16 | 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. |
| 17 | */ |
30 | */ |
| 18 | |
31 | |
| 19 | #include "config.h" |
32 | #include "config.h" |
| 20 | |
33 | |
| 21 | #include <map> |
34 | #include <map> |
| 22 | |
35 | |
| 23 | #include "vpn.h" |
36 | #include "vpn.h" |
| 24 | |
37 | |
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38 | extern struct vpn network; |
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39 | |
| 25 | struct ether_emu : map<u32, int> { |
40 | struct ether_emu : map<u32, int> |
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41 | { |
| 26 | typedef map<u32, int> ipv4map; |
42 | typedef map<u32, int> ipv4map; |
| 27 | ipv4map ipv4; |
43 | ipv4map ipv4; |
| 28 | |
44 | |
| 29 | bool tun_to_tap (tap_packet *pkt); |
45 | bool tun_to_tap (tap_packet *pkt); |
| 30 | bool tap_to_tun (tap_packet *pkt); |
46 | bool tap_to_tun (tap_packet *pkt); |
| … | |
… | |
| 35 | } |
51 | } |
| 36 | }; |
52 | }; |
| 37 | |
53 | |
| 38 | static struct ether_emu ether_emu; |
54 | static struct ether_emu ether_emu; |
| 39 | |
55 | |
| 40 | bool |
56 | bool |
| 41 | ether_emu::tun_to_tap (tap_packet *pkt) |
57 | ether_emu::tun_to_tap (tap_packet *pkt) |
| 42 | { |
58 | { |
| 43 | int dst; |
59 | int dst; |
| 44 | |
60 | |
| 45 | if (pkt->is_ipv4 ()) |
61 | if (pkt->is_ipv4 ()) |
| … | |
… | |
| 81 | id2mac (dst, pkt->dst); |
97 | id2mac (dst, pkt->dst); |
| 82 | |
98 | |
| 83 | return true; |
99 | return true; |
| 84 | } |
100 | } |
| 85 | |
101 | |
| 86 | bool |
102 | bool |
| 87 | ether_emu::tap_to_tun (tap_packet *pkt) |
103 | ether_emu::tap_to_tun (tap_packet *pkt) |
| 88 | { |
104 | { |
| 89 | if (pkt->is_arp ()) |
105 | if (pkt->is_arp ()) |
| 90 | { |
106 | { |
| 91 | u32 ip_src = *(u32 *)&(*pkt)[28]; |
107 | u32 ip_src = *(u32 *)&(*pkt)[28]; |
