Mercurial > hg > nginx-quic
annotate src/core/ngx_rbtree.h @ 7870:e169cce912c7 quic
Avoid retransmitting of packets with discarded keys.
Sections 4.10.1 and 4.10.2 of quic transport describe discarding of initial
and handshake keys. Since the keys are discarded, we no longer need
to retransmit packets and corresponding queues should be emptied.
This patch removes previously added workaround that did not require
acknowledgement for initial packets, resulting in avoiding retransmission,
which is wrong because a packet could be lost and we have to retransmit it.
author | Vladimir Homutov <vl@nginx.com> |
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date | Mon, 18 May 2020 13:54:53 +0300 |
parents | e0cc454aafe4 |
children | 0c5e84096d99 |
rev | line source |
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441
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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8 #ifndef _NGX_RBTREE_H_INCLUDED_ |
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9 #define _NGX_RBTREE_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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15 |
557 | 16 typedef ngx_uint_t ngx_rbtree_key_t; |
17 typedef ngx_int_t ngx_rbtree_key_int_t; | |
18 | |
19 | |
559 | 20 typedef struct ngx_rbtree_node_s ngx_rbtree_node_t; |
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21 |
559 | 22 struct ngx_rbtree_node_s { |
23 ngx_rbtree_key_t key; | |
24 ngx_rbtree_node_t *left; | |
25 ngx_rbtree_node_t *right; | |
26 ngx_rbtree_node_t *parent; | |
853 | 27 u_char color; |
28 u_char data; | |
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29 }; |
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31 |
559 | 32 typedef struct ngx_rbtree_s ngx_rbtree_t; |
33 | |
853 | 34 typedef void (*ngx_rbtree_insert_pt) (ngx_rbtree_node_t *root, |
559 | 35 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); |
36 | |
37 struct ngx_rbtree_s { | |
38 ngx_rbtree_node_t *root; | |
39 ngx_rbtree_node_t *sentinel; | |
853 | 40 ngx_rbtree_insert_pt insert; |
559 | 41 }; |
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43 |
1686 | 44 #define ngx_rbtree_init(tree, s, i) \ |
45 ngx_rbtree_sentinel_init(s); \ | |
46 (tree)->root = s; \ | |
47 (tree)->sentinel = s; \ | |
48 (tree)->insert = i | |
49 | |
50 | |
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51 void ngx_rbtree_insert(ngx_rbtree_t *tree, ngx_rbtree_node_t *node); |
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52 void ngx_rbtree_delete(ngx_rbtree_t *tree, ngx_rbtree_node_t *node); |
861 | 53 void ngx_rbtree_insert_value(ngx_rbtree_node_t *root, ngx_rbtree_node_t *node, |
54 ngx_rbtree_node_t *sentinel); | |
853 | 55 void ngx_rbtree_insert_timer_value(ngx_rbtree_node_t *root, |
56 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); | |
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57 ngx_rbtree_node_t *ngx_rbtree_next(ngx_rbtree_t *tree, |
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58 ngx_rbtree_node_t *node); |
559 | 59 |
60 | |
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61 #define ngx_rbt_red(node) ((node)->color = 1) |
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62 #define ngx_rbt_black(node) ((node)->color = 0) |
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63 #define ngx_rbt_is_red(node) ((node)->color) |
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64 #define ngx_rbt_is_black(node) (!ngx_rbt_is_red(node)) |
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65 #define ngx_rbt_copy_color(n1, n2) (n1->color = n2->color) |
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66 |
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67 |
965 | 68 /* a sentinel must be black */ |
69 | |
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70 #define ngx_rbtree_sentinel_init(node) ngx_rbt_black(node) |
965 | 71 |
72 | |
559 | 73 static ngx_inline ngx_rbtree_node_t * |
74 ngx_rbtree_min(ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel) | |
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75 { |
557 | 76 while (node->left != sentinel) { |
77 node = node->left; | |
78 } | |
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79 |
557 | 80 return node; |
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81 } |
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84 #endif /* _NGX_RBTREE_H_INCLUDED_ */ |