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author | Christian Grothoff <christian@grothoff.org> | 2012-01-02 10:22:43 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2012-01-02 10:22:43 +0000 |
commit | b34e3da4e96d110290706f55ec44c97e796d65cd (patch) | |
tree | b87db9a2700de6dbcccc2728df674802b8eb626d /src/vpn/gnunet-vpn-checksum.c | |
parent | d583ad46d4babd962f362deac20fa5aa6cdce7c7 (diff) | |
download | gnunet-b34e3da4e96d110290706f55ec44c97e796d65cd.tar.gz gnunet-b34e3da4e96d110290706f55ec44c97e796d65cd.zip |
-vpn should use crc16 from util
Diffstat (limited to 'src/vpn/gnunet-vpn-checksum.c')
-rw-r--r-- | src/vpn/gnunet-vpn-checksum.c | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/src/vpn/gnunet-vpn-checksum.c b/src/vpn/gnunet-vpn-checksum.c deleted file mode 100644 index 0e0e24cdc..000000000 --- a/src/vpn/gnunet-vpn-checksum.c +++ /dev/null | |||
@@ -1,57 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2010 Christian Grothoff | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 3, or (at your | ||
8 | option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file vpn/gnunet-vpn-checksum.c | ||
23 | * @brief | ||
24 | * @author Philipp Toelke | ||
25 | */ | ||
26 | |||
27 | #include "gnunet-vpn-checksum.h" | ||
28 | |||
29 | uint32_t | ||
30 | calculate_checksum_update (uint32_t sum, uint16_t * hdr, short len) | ||
31 | { | ||
32 | for (; len >= 2; len -= 2) | ||
33 | sum += *(hdr++); | ||
34 | if (len == 1) | ||
35 | sum += *((unsigned char *) hdr); | ||
36 | return sum; | ||
37 | } | ||
38 | |||
39 | uint16_t | ||
40 | calculate_checksum_end (uint32_t sum) | ||
41 | { | ||
42 | while (sum >> 16) | ||
43 | sum = (sum >> 16) + (sum & 0xFFFF); | ||
44 | |||
45 | return ~sum; | ||
46 | } | ||
47 | |||
48 | /** | ||
49 | * Calculate the checksum of an IPv4-Header | ||
50 | */ | ||
51 | uint16_t | ||
52 | calculate_ip_checksum (uint16_t * hdr, short len) | ||
53 | { | ||
54 | uint32_t sum = calculate_checksum_update (0, hdr, len); | ||
55 | |||
56 | return calculate_checksum_end (sum); | ||
57 | } | ||