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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46 | { |
47 | { |
47 | len = pkt.len; |
48 | len = pkt.len; |
48 | memcpy (&((*this)[0]), &(pkt[0]), len); |
49 | memcpy (&((*this)[0]), &(pkt[0]), len); |
49 | } |
50 | } |
50 | |
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 | |
51 | bool is_arp () |
68 | bool is_arp () const |
52 | { |
69 | { |
53 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
70 | return (*this)[12] == 0x08 && (*this)[13] == 0x06 // 0806 protocol |
54 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
71 | && (*this)[14] == 0x00 && (*this)[15] == 0x01 // 0001 hw_format |
55 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
72 | && (*this)[16] == 0x08 && (*this)[17] == 0x00 // 0800 prot_format |
56 | && (*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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76 | mac dst; |
93 | mac dst; |
77 | mac src; |
94 | mac src; |
78 | u8 data[MAXSIZE - 12]; |
95 | u8 data[MAXSIZE - 12]; |
79 | }; |
96 | }; |
80 | |
97 | |
81 | struct tap_device_base { |
98 | struct tap_device { |
82 | int fd; |
99 | int fd; |
83 | |
100 | |
84 | // network interface name or identifier |
101 | // network interface name or identifier |
85 | char ifrname[IFNAMESIZE + 1]; |
102 | char ifrname[IFNAMESIZE + 1]; |
86 | |
103 | |