diff options
author | Deepak S <deepak.s@linux.intel.com> | 2017-07-13 21:26:50 -0700 |
---|---|---|
committer | Deepak S <deepak.s@linux.intel.com> | 2017-07-14 04:58:47 -0700 |
commit | 7286b2518ec8e4398b512ce95def9166a7af2e4a (patch) | |
tree | c93ef65d9e73e8893ccecb720152e16aae96a8b6 /VNFs/DPPD-PROX/toeplitz.c | |
parent | adcb79da90176b27224eeb1d00aa0e611ef85a9b (diff) |
Adding PROX(Packet pROcessing eXecution engine) VNF to sampleVNF
JIRA: SAMPLEVNF-55
PROX is a DPDK-based application implementing Telco use-cases such as
a simplified BRAS/BNG, light-weight AFTR... It also allows configuring
finer grained network functions like QoS, Routing, load-balancing...
(We are moving PROX version v039 to sampleVNF
https://01.org/intel-data-plane-performance-demonstrators/prox-overview)
Change-Id: Ia3cb02cf0e49ac5596e922c197ff7e010293d033
Signed-off-by: Deepak S <deepak.s@linux.intel.com>
Diffstat (limited to 'VNFs/DPPD-PROX/toeplitz.c')
-rw-r--r-- | VNFs/DPPD-PROX/toeplitz.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/VNFs/DPPD-PROX/toeplitz.c b/VNFs/DPPD-PROX/toeplitz.c new file mode 100644 index 00000000..62424579 --- /dev/null +++ b/VNFs/DPPD-PROX/toeplitz.c @@ -0,0 +1,60 @@ +/* +// Copyright (c) 2010-2017 Intel Corporation +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +*/ + +#include <stdio.h> +#include <stdint.h> +#include "toeplitz.h" + +/* From XL710 Datasheet, 7.1.10 */ + +uint8_t toeplitz_init_key[TOEPLITZ_KEY_LEN] = + {0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x8f, 0xb0, + 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, + 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, + 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, + 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 +}; + +uint32_t toeplitz_hash(uint8_t *buf_p, int buflen) +{ + uint32_t result = 0; + uint8_t *key_p = toeplitz_init_key; + uint8_t byte, *byte4_p = key_p+4; + int i, pos = 0; + int bit = 0; + uint32_t key_word = __builtin_bswap32(*(uint32_t *)key_p); + + for (i = 0; i < buflen; ++i) { + byte = buf_p[i]; + for (bit = 0; bit <= 7; ++bit) { + if (byte & (1 << (7 - bit))) { + result ^= key_word; + } + key_word = (key_word << 1) | ((*byte4_p >> (7 - bit)) & 1); + } + if (pos >= TOEPLITZ_KEY_LEN - 4) { + pos = 0; + byte4_p = key_p; + } + else { + pos++; + byte4_p++; + } + } + return result; +} |