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authorChristian Grothoff <christian@grothoff.org>2012-01-02 10:22:43 +0000
committerChristian Grothoff <christian@grothoff.org>2012-01-02 10:22:43 +0000
commitb34e3da4e96d110290706f55ec44c97e796d65cd (patch)
treeb87db9a2700de6dbcccc2728df674802b8eb626d /src/vpn/gnunet-vpn-checksum.c
parentd583ad46d4babd962f362deac20fa5aa6cdce7c7 (diff)
downloadgnunet-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.c57
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
29uint32_t
30calculate_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
39uint16_t
40calculate_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 */
51uint16_t
52calculate_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}