Mercurial > hg > nginx-quic
annotate src/core/ngx_resolver.h @ 4515:8bb695c05870 stable-1.0
Merge of r4498:
Fix of rbtree lookup on hash collisions.
Previous code incorrectly assumed that nodes with identical keys are linked
together. This might not be true after tree rebalance.
Patch by Lanshun Zhou.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 05 Mar 2012 13:17:56 +0000 |
parents | 4919fb357a5d |
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rev | line source |
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1649 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4450
4919fb357a5d
Merge of r4406, r4413: copyrights updated.
Maxim Dounin <mdounin@mdounin.ru>
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3408
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4 * Copyright (C) Nginx, Inc. |
1649 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 | |
11 | |
12 #ifndef _NGX_RESOLVER_H_INCLUDED_ | |
13 #define _NGX_RESOLVER_H_INCLUDED_ | |
14 | |
15 | |
16 #define NGX_RESOLVE_A 1 | |
17 #define NGX_RESOLVE_CNAME 5 | |
18 #define NGX_RESOLVE_PTR 12 | |
19 #define NGX_RESOLVE_MX 15 | |
20 #define NGX_RESOLVE_TXT 16 | |
1965 | 21 #define NGX_RESOLVE_DNAME 39 |
1649 | 22 |
23 #define NGX_RESOLVE_FORMERR 1 | |
24 #define NGX_RESOLVE_SERVFAIL 2 | |
25 #define NGX_RESOLVE_NXDOMAIN 3 | |
26 #define NGX_RESOLVE_NOTIMP 4 | |
27 #define NGX_RESOLVE_REFUSED 5 | |
28 #define NGX_RESOLVE_TIMEDOUT NGX_ETIMEDOUT | |
29 | |
30 | |
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allow to use IP addresses without defined resolver
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31 #define NGX_NO_RESOLVER (void *) -1 |
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
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32 |
1969 | 33 #define NGX_RESOLVER_MAX_RECURSION 50 |
34 | |
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35 |
1649 | 36 typedef struct { |
37 ngx_connection_t *connection; | |
38 struct sockaddr *sockaddr; | |
39 socklen_t socklen; | |
40 ngx_str_t server; | |
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add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
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41 ngx_log_t log; |
1649 | 42 } ngx_udp_connection_t; |
43 | |
44 | |
45 typedef struct ngx_resolver_ctx_s ngx_resolver_ctx_t; | |
46 | |
47 typedef void (*ngx_resolver_handler_pt)(ngx_resolver_ctx_t *ctx); | |
48 | |
49 | |
50 typedef struct { | |
51 ngx_rbtree_node_t node; | |
52 ngx_queue_t queue; | |
53 | |
54 /* PTR: resolved name, A: name to resolve */ | |
55 u_char *name; | |
56 | |
57 u_short nlen; | |
58 u_short qlen; | |
59 | |
60 u_char *query; | |
61 | |
62 union { | |
63 in_addr_t addr; | |
64 in_addr_t *addrs; | |
65 u_char *cname; | |
66 } u; | |
67 | |
68 u_short naddrs; | |
69 u_short cnlen; | |
70 | |
71 time_t expire; | |
72 time_t valid; | |
73 | |
74 ngx_resolver_ctx_t *waiting; | |
75 } ngx_resolver_node_t; | |
76 | |
77 | |
78 typedef struct { | |
79 /* has to be pointer because of "incomplete type" */ | |
80 ngx_event_t *event; | |
81 | |
82 /* TODO: DNS peers balancer */ | |
83 /* STUB */ | |
84 ngx_udp_connection_t *udp_connection; | |
85 | |
86 ngx_log_t *log; | |
87 | |
88 /* ident must be after 3 pointers */ | |
89 ngx_int_t ident; | |
90 | |
91 ngx_rbtree_t name_rbtree; | |
92 ngx_rbtree_node_t name_sentinel; | |
93 | |
94 ngx_rbtree_t addr_rbtree; | |
95 ngx_rbtree_node_t addr_sentinel; | |
96 | |
97 ngx_queue_t name_resend_queue; | |
98 ngx_queue_t addr_resend_queue; | |
99 | |
100 ngx_queue_t name_expire_queue; | |
101 ngx_queue_t addr_expire_queue; | |
102 | |
103 time_t resend_timeout; | |
104 time_t expire; | |
105 time_t valid; | |
106 | |
107 ngx_uint_t log_level; | |
108 } ngx_resolver_t; | |
109 | |
110 | |
111 struct ngx_resolver_ctx_s { | |
112 ngx_resolver_ctx_t *next; | |
113 ngx_resolver_t *resolver; | |
114 ngx_udp_connection_t *udp_connection; | |
115 | |
116 /* ident must be after 3 pointers */ | |
117 ngx_int_t ident; | |
118 | |
119 ngx_int_t state; | |
120 ngx_int_t type; | |
121 ngx_str_t name; | |
122 | |
123 ngx_uint_t naddrs; | |
124 in_addr_t *addrs; | |
125 in_addr_t addr; | |
126 | |
127 /* TODO: DNS peers balancer ctx */ | |
128 | |
129 ngx_resolver_handler_pt handler; | |
130 void *data; | |
131 ngx_msec_t timeout; | |
132 | |
133 ngx_uint_t quick; /* unsigned quick:1; */ | |
1969 | 134 ngx_uint_t recursion; |
1649 | 135 ngx_event_t *event; |
136 }; | |
137 | |
138 | |
3269
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rename ngx_peer_addr_t to ngx_addr_t
Igor Sysoev <igor@sysoev.ru>
parents:
1969
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139 ngx_resolver_t *ngx_resolver_create(ngx_conf_t *cf, ngx_addr_t *addr); |
1649 | 140 ngx_resolver_ctx_t *ngx_resolve_start(ngx_resolver_t *r, |
141 ngx_resolver_ctx_t *temp); | |
142 ngx_int_t ngx_resolve_name(ngx_resolver_ctx_t *ctx); | |
143 void ngx_resolve_name_done(ngx_resolver_ctx_t *ctx); | |
144 ngx_int_t ngx_resolve_addr(ngx_resolver_ctx_t *ctx); | |
145 void ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx); | |
146 char *ngx_resolver_strerror(ngx_int_t err); | |
147 | |
148 | |
149 #endif /* _NGX_RESOLVER_H_INCLUDED_ */ |