diff options
author | Damjan Marion <damarion@cisco.com> | 2016-12-28 18:38:59 +0100 |
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committer | Damjan Marion <damarion@cisco.com> | 2017-01-01 18:11:43 +0100 |
commit | cb034b9b374927c7552e36dcbc306d8456b2a0cb (patch) | |
tree | 9ff64f9792560630c8cf8faa2f74fc20671c30f1 /plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno_analyse.c | |
parent | fdc62abdc113ea63dc867375bd49ef3043dcd290 (diff) |
Move java,lua api and remaining plugins to src/
Change-Id: I1c3b87e886603678368428ae56a6bd3327cbc90d
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno_analyse.c')
-rw-r--r-- | plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno_analyse.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno_analyse.c b/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno_analyse.c deleted file mode 100644 index 4638871c224..00000000000 --- a/plugins/ioam-plugin/ioam/encap/ip6_ioam_seqno_analyse.c +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Copyright (c) 2016 Cisco and/or its affiliates. - * 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 <vnet/vnet.h> -#include "ip6_ioam_seqno.h" - -static inline void BIT_SET (u64 *p, u32 n) -{ - p[ n>>5 ] |= (1 << (n&31)); -} - -static inline int BIT_TEST (u64 *p, u32 n) -{ - return p[ n>>5 ] & (1 << (n&31)); -} - -static void BIT_CLEAR (u64 *p, u64 start, int num_bits, u32 mask) -{ - int n, t; - int start_index = (start >> 5); - int mask_index = (mask >> 5); - - start_index &= mask_index; - if (start & 0x1f) - { - int start_bit = (start & 0x1f); - - n = (1 << start_bit)-1; - t = start_bit + num_bits; - if (t < 32) - { - n |= ~((1 << t)-1); - p[ start_index ] &= n; - return; - } - p[ start_index ] &= n; - start_index = (start_index + 1) & mask_index; - num_bits -= (32 - start_bit); - } - while (num_bits >= 32) - { - p[ start_index ] = 0; - start_index = (start_index + 1) & mask_index; - num_bits -= 32; - } - n = ~((1 << num_bits) - 1); - p[ start_index ] &= n; -} - -static inline u8 seqno_check_wraparound(u32 a, u32 b) -{ - if ((a != b) && (a > b) && ((a - b) > SEQ_CHECK_VALUE)) - { - return 1; - } - return 0; -} - -/* - * Function to analyze the PPC value recevied. - * - Updates the bitmap with received sequence number - * - counts the received/lost/duplicate/reordered packets - */ -void ioam_analyze_seqno (seqno_rx_info *seqno_rx, u64 seqno) -{ - int diff; - static int peer_dead_count; - seqno_bitmap *bitmap = &seqno_rx->bitmap; - - seqno_rx->rx_packets++; - - if (seqno > bitmap->highest) - { /* new larger sequence number */ - peer_dead_count = 0; - diff = seqno - bitmap->highest; - if (diff < bitmap->window_size) - { - if (diff > 1) - { /* diff==1 is *such* a common case it's a win to optimize it */ - BIT_CLEAR(bitmap->array, bitmap->highest+1, diff-1, bitmap->mask); - seqno_rx->lost_packets += diff -1; - } - } - else - { - seqno_rx->lost_packets += diff -1; - memset( bitmap->array, 0, bitmap->array_size * sizeof(u64) ); - } - BIT_SET(bitmap->array, seqno & bitmap->mask); - bitmap->highest = seqno; - return; - } - - /* we've seen a bigger seq number before */ - diff = bitmap->highest - seqno; - if (diff >= bitmap->window_size) - { - if (seqno_check_wraparound(bitmap->highest, seqno)) - { - memset( bitmap->array, 0, bitmap->array_size * sizeof(u64)); - BIT_SET(bitmap->array, seqno & bitmap->mask); - bitmap->highest = seqno; - return; - } - else - { - peer_dead_count++; - if (peer_dead_count > 25) - { - peer_dead_count = 0; - memset( bitmap->array, 0, bitmap->array_size * sizeof(u64) ); - BIT_SET(bitmap->array, seqno & bitmap->mask); - bitmap->highest = seqno; - } - //ppc_rx->reordered_packets++; - } - return; - } - - if (BIT_TEST(bitmap->array, seqno & bitmap->mask)) - { - seqno_rx->dup_packets++; - return; /* Already seen */ - } - seqno_rx->reordered_packets++; - seqno_rx->lost_packets--; - BIT_SET(bitmap->array, seqno & bitmap->mask); - return; -} |