From b34e3da4e96d110290706f55ec44c97e796d65cd Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Mon, 2 Jan 2012 10:22:43 +0000 Subject: -vpn should use crc16 from util --- src/vpn/Makefile.am | 6 ++--- src/vpn/gnunet-daemon-exit.c | 36 +++++++++++++-------------- src/vpn/gnunet-daemon-vpn.c | 54 ++++++++++++++++++++-------------------- src/vpn/gnunet-vpn-checksum.c | 57 ------------------------------------------- src/vpn/gnunet-vpn-checksum.h | 37 ---------------------------- 5 files changed, 47 insertions(+), 143 deletions(-) delete mode 100644 src/vpn/gnunet-vpn-checksum.c delete mode 100644 src/vpn/gnunet-vpn-checksum.h diff --git a/src/vpn/Makefile.am b/src/vpn/Makefile.am index bdfca7f2f..38b37dd65 100644 --- a/src/vpn/Makefile.am +++ b/src/vpn/Makefile.am @@ -33,8 +33,7 @@ gnunet_helper_vpn_SOURCES = \ gnunet-helper-vpn.c gnunet_daemon_vpn_SOURCES = \ - gnunet-daemon-vpn.c gnunet-daemon-vpn.h \ - gnunet-vpn-checksum.c gnunet-vpn-checksum.h + gnunet-daemon-vpn.c gnunet-daemon-vpn.h gnunet_daemon_vpn_LDADD = \ $(top_builddir)/src/core/libgnunetcore.la \ $(top_builddir)/src/statistics/libgnunetstatistics.la \ @@ -45,8 +44,7 @@ gnunet_daemon_vpn_LDADD = \ $(GN_LIBINTL) gnunet_daemon_exit_SOURCES = \ - gnunet-daemon-exit.c \ - gnunet-vpn-checksum.c gnunet-vpn-checksum.h + gnunet-daemon-exit.c gnunet_daemon_exit_LDADD = \ $(top_builddir)/src/core/libgnunetcore.la \ $(top_builddir)/src/statistics/libgnunetstatistics.la \ diff --git a/src/vpn/gnunet-daemon-exit.c b/src/vpn/gnunet-daemon-exit.c index ebe3ec61a..608646202 100644 --- a/src/vpn/gnunet-daemon-exit.c +++ b/src/vpn/gnunet-daemon-exit.c @@ -835,8 +835,8 @@ prepare_ipv4_packet (size_t len, uint16_t pktlen, void *payload, pkt4_tcp->tcp_hdr.crc = 0; uint32_t sum = 0; - sum = calculate_checksum_update (sum, (uint16_t *) &pkt4->ip_hdr.sadr, sizeof (struct in_addr)); - sum = calculate_checksum_update (sum, (uint16_t *) &pkt4->ip_hdr.dadr, sizeof (struct in_addr)); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) &pkt4->ip_hdr.sadr, sizeof (struct in_addr)); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) &pkt4->ip_hdr.dadr, sizeof (struct in_addr)); tmp = (protocol << 16) | (0xffff & pktlen); @@ -845,16 +845,16 @@ prepare_ipv4_packet (size_t len, uint16_t pktlen, void *payload, tmp = htonl (tmp); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt4_tcp->tcp_hdr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt4_tcp->tcp_hdr, pktlen); - pkt4_tcp->tcp_hdr.crc = calculate_checksum_end (sum); + pkt4_tcp->tcp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); } pkt4->ip_hdr.chks = - calculate_ip_checksum ((uint16_t *) & pkt4->ip_hdr, 5 * 4); + GNUNET_CRYPTO_crc16_n ((uint16_t *) & pkt4->ip_hdr, 5 * 4); } static void @@ -919,20 +919,20 @@ prepare_ipv6_packet (size_t len, uint16_t pktlen, void *payload, uint32_t sum = 0; sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6_udp->ip6_hdr.sadr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6_udp->ip6_hdr.sadr, 16); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6_udp->ip6_hdr.dadr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6_udp->ip6_hdr.dadr, 16); tmp = (htons (pktlen) & 0xffff); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); tmp = htons (((pkt6_udp->ip6_hdr.nxthdr & 0x00ff))); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6_udp->udp_hdr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6_udp->udp_hdr, ntohs (pkt6_udp->udp_hdr.len)); - pkt6_udp->udp_hdr.crc = calculate_checksum_end (sum); + pkt6_udp->udp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); } else if (IPPROTO_TCP == protocol) { @@ -944,18 +944,18 @@ prepare_ipv6_packet (size_t len, uint16_t pktlen, void *payload, uint32_t sum = 0; sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->ip6_hdr.sadr, 16); + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->ip6_hdr.sadr, 16); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->ip6_hdr.dadr, 16); + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->ip6_hdr.dadr, 16); tmp = htonl (pktlen); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); tmp = htonl (((pkt6->ip6_hdr.nxthdr & 0x000000ff))); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6_tcp->tcp_hdr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6_tcp->tcp_hdr, ntohs (pkt6->ip6_hdr.paylgth)); - pkt6_tcp->tcp_hdr.crc = calculate_checksum_end (sum); + pkt6_tcp->tcp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); } } diff --git a/src/vpn/gnunet-daemon-vpn.c b/src/vpn/gnunet-daemon-vpn.c index 35db8af7b..ad6ed5044 100644 --- a/src/vpn/gnunet-daemon-vpn.c +++ b/src/vpn/gnunet-daemon-vpn.c @@ -299,18 +299,18 @@ helper_write (void *cls GNUNET_UNUSED, pkt->udp_dns.udp_hdr.crc = 0; uint32_t sum = 0; - sum = calculate_checksum_update (sum, (uint16_t *) & pkt->ip6_hdr.sadr, 16); - sum = calculate_checksum_update (sum, (uint16_t *) & pkt->ip6_hdr.dadr, 16); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt->ip6_hdr.sadr, 16); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt->ip6_hdr.dadr, 16); uint32_t tmp = (pkt->udp_dns.udp_hdr.len & 0xffff); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); tmp = htons (((pkt->ip6_hdr.nxthdr & 0x00ff))); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt->udp_dns.udp_hdr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt->udp_dns.udp_hdr, ntohs (net_len - sizeof (struct ip6_hdr))); - pkt->udp_dns.udp_hdr.crc = calculate_checksum_end (sum); + pkt->udp_dns.udp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); pkt->ip6_hdr.version = 6; pkt->ip6_hdr.paylgth = net_len - sizeof (struct ip6_hdr); @@ -360,7 +360,7 @@ helper_write (void *cls GNUNET_UNUSED, memcpy (&pkt->ip_hdr.dadr, ans->pkt.to, 4); pkt->ip_hdr.chks = - calculate_ip_checksum ((uint16_t *) & pkt->ip_hdr, 5 * 4); + GNUNET_CRYPTO_crc16_n ((uint16_t *) & pkt->ip_hdr, 5 * 4); /* set the udp-header */ pkt->udp_dns.udp_hdr.spt = htons (53); @@ -805,7 +805,7 @@ send_icmp4_response (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc) response->ip_hdr.tot_lngth = request->ip_hdr.tot_lngth; response->ip_hdr.chks = - calculate_ip_checksum ((uint16_t *) & response->ip_hdr, 20); + GNUNET_CRYPTO_crc16_n ((uint16_t *) & response->ip_hdr, 20); response->icmp_hdr.code = 0; response->icmp_hdr.type = 0x0; @@ -1475,19 +1475,19 @@ receive_udp_back (void *cls GNUNET_UNUSED, struct GNUNET_MESH_Tunnel *tunnel, uint32_t sum = 0; sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->ip6_hdr.sadr, 16); + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->ip6_hdr.sadr, 16); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->ip6_hdr.dadr, 16); + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->ip6_hdr.dadr, 16); uint32_t tmp = (pkt6->udp_hdr.len & 0xffff); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); tmp = htons (((pkt6->ip6_hdr.nxthdr & 0x00ff))); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->udp_hdr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->udp_hdr, ntohs (pkt->len)); - pkt6->udp_hdr.crc = calculate_checksum_end (sum); + pkt6->udp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); (void) GNUNET_HELPER_send (helper_handle, &pkt6->shdr, @@ -1561,7 +1561,7 @@ receive_udp_back (void *cls GNUNET_UNUSED, struct GNUNET_MESH_Tunnel *tunnel, pkt4->udp_hdr.crc = 0; /* Optional for IPv4 */ pkt4->ip_hdr.chks = - calculate_ip_checksum ((uint16_t *) & pkt4->ip_hdr, 5 * 4); + GNUNET_CRYPTO_crc16_n ((uint16_t *) & pkt4->ip_hdr, 5 * 4); (void) GNUNET_HELPER_send (helper_handle, &pkt4->shdr, @@ -1655,18 +1655,18 @@ receive_tcp_back (void *cls GNUNET_UNUSED, struct GNUNET_MESH_Tunnel *tunnel, uint32_t tmp; sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->ip6_hdr.sadr, 16); + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->ip6_hdr.sadr, 16); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->ip6_hdr.dadr, 16); + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->ip6_hdr.dadr, 16); tmp = htonl (pktlen); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); tmp = htonl (((pkt6->ip6_hdr.nxthdr & 0x000000ff))); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); sum = - calculate_checksum_update (sum, (uint16_t *) & pkt6->tcp_hdr, + GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt6->tcp_hdr, ntohs (pkt6->ip6_hdr.paylgth)); - pkt6->tcp_hdr.crc = calculate_checksum_end (sum); + pkt6->tcp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); (void) GNUNET_HELPER_send (helper_handle, &pkt6->shdr, @@ -1737,20 +1737,20 @@ receive_tcp_back (void *cls GNUNET_UNUSED, struct GNUNET_MESH_Tunnel *tunnel, uint32_t sum = 0; uint32_t tmp; - sum = calculate_checksum_update (sum, (uint16_t *) &pkt4->ip_hdr.sadr, 4); - sum = calculate_checksum_update (sum, (uint16_t *) &pkt4->ip_hdr.dadr, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) &pkt4->ip_hdr.sadr, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) &pkt4->ip_hdr.dadr, 4); tmp = (0x06 << 16) | (0xffff & pktlen); // 0x06 for TCP? tmp = htonl (tmp); - sum = calculate_checksum_update (sum, (uint16_t *) & tmp, 4); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & tmp, 4); - sum = calculate_checksum_update (sum, (uint16_t *) & pkt4->tcp_hdr, pktlen); - pkt4->tcp_hdr.crc = calculate_checksum_end (sum); + sum = GNUNET_CRYPTO_crc16_step (sum, (uint16_t *) & pkt4->tcp_hdr, pktlen); + pkt4->tcp_hdr.crc = GNUNET_CRYPTO_crc16_finish (sum); pkt4->ip_hdr.chks = - calculate_ip_checksum ((uint16_t *) & pkt4->ip_hdr, 5 * 4); + GNUNET_CRYPTO_crc16_n ((uint16_t *) & pkt4->ip_hdr, 5 * 4); (void) GNUNET_HELPER_send (helper_handle, &pkt4->shdr, 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 @@ -/* - This file is part of GNUnet. - (C) 2010 Christian Grothoff - - GNUnet is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3, or (at your - option) any later version. - - GNUnet is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GNUnet; see the file COPYING. If not, write to the - Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. -*/ - -/** - * @file vpn/gnunet-vpn-checksum.c - * @brief - * @author Philipp Toelke - */ - -#include "gnunet-vpn-checksum.h" - -uint32_t -calculate_checksum_update (uint32_t sum, uint16_t * hdr, short len) -{ - for (; len >= 2; len -= 2) - sum += *(hdr++); - if (len == 1) - sum += *((unsigned char *) hdr); - return sum; -} - -uint16_t -calculate_checksum_end (uint32_t sum) -{ - while (sum >> 16) - sum = (sum >> 16) + (sum & 0xFFFF); - - return ~sum; -} - -/** - * Calculate the checksum of an IPv4-Header - */ -uint16_t -calculate_ip_checksum (uint16_t * hdr, short len) -{ - uint32_t sum = calculate_checksum_update (0, hdr, len); - - return calculate_checksum_end (sum); -} diff --git a/src/vpn/gnunet-vpn-checksum.h b/src/vpn/gnunet-vpn-checksum.h deleted file mode 100644 index 51f044380..000000000 --- a/src/vpn/gnunet-vpn-checksum.h +++ /dev/null @@ -1,37 +0,0 @@ -/* - This file is part of GNUnet. - (C) 2010 Christian Grothoff - - GNUnet is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3, or (at your - option) any later version. - - GNUnet is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GNUnet; see the file COPYING. If not, write to the - Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. -*/ -#ifndef GNUNET_VPN_CHECKSUM_H -#define GNUNET_VPN_CHECKSUM_H - -#include - -uint32_t -calculate_checksum_update (uint32_t sum, uint16_t * hdr, short len); - -uint16_t -calculate_checksum_end (uint32_t sum); - -/** - * Calculate the checksum of an IPv4-Header - */ -uint16_t -calculate_ip_checksum (uint16_t * hdr, short len); - -#endif /* end of include guard: GNUNET-VPN-CHECKSUM_H */ -- cgit v1.2.3