89 lines
3.4 KiB
C
Executable File
89 lines
3.4 KiB
C
Executable File
/*
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* Copyright (c) 2017, Peter Haag
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* Copyright (c) 2014, Peter Haag
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* Copyright (c) 2009, Peter Haag
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* Copyright (c) 2004-2008, SWITCH - Teleinformatikdienste fuer Lehre und Forschung
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of the author nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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static inline void ApplyNetMaskBits(master_record_t *flow_record, int apply_netbits);
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static inline void ApplyNetMaskBits(master_record_t *flow_record, int apply_netbits) {
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if ( (flow_record->flags & FLAG_IPV6_ADDR ) != 0 ) { // IPv6
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if ( apply_netbits & 1 ) {
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uint64_t mask;
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uint32_t mask_bits = flow_record->src_mask;
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if ( mask_bits > 64 ) {
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mask = 0xffffffffffffffffLL << ( 128 - mask_bits );
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flow_record->V6.srcaddr[1] &= mask;
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} else {
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mask = 0xffffffffffffffffLL << ( 64 - mask_bits );
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flow_record->V6.srcaddr[0] &= mask;
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flow_record->V6.srcaddr[1] = 0;
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}
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}
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if ( apply_netbits & 2 ) {
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uint64_t mask;
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uint32_t mask_bits = flow_record->dst_mask;
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if ( mask_bits > 64 ) {
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mask = 0xffffffffffffffffLL << ( 128 - mask_bits );
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flow_record->V6.dstaddr[1] &= mask;
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} else {
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mask = 0xffffffffffffffffLL << ( 64 - mask_bits );
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flow_record->V6.dstaddr[0] &= mask;
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flow_record->V6.dstaddr[1] = 0;
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}
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}
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} else { // IPv4
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if ( apply_netbits & 1 ) {
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uint32_t srcmask = 0xffffffff << ( 32 - flow_record->src_mask );
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flow_record->V4.srcaddr &= srcmask;
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}
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if ( apply_netbits & 2 ) {
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uint32_t dstmask = 0xffffffff << ( 32 - flow_record->dst_mask );
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flow_record->V4.dstaddr &= dstmask;
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}
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}
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} // End of ApplyNetMaskBits
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static inline void ApplyAggrMask(master_record_t *record, master_record_t *mask) {
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uint64_t *r = (uint64_t *)record;
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uint64_t *m = (uint64_t *)mask;
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int i, max_offset;
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max_offset = offsetof(master_record_t, map_ref) >> 3;
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for (i=2; i<max_offset; i++) {
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r[i] &= m[i];
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}
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} // End of ApplyAggrMask
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