Mercurial > hg > nginx-quic
annotate src/core/ngx_resolver.h @ 5905:2f7e557eab5b
Cache: proxy_cache_lock_age and friends.
Once this age is reached, the cache lock is discarded and another
request can acquire the lock. Requests which failed to acquire
the lock are not allowed to cache the response.
| author | Roman Arutyunyan <arut@nginx.com> |
|---|---|
| date | Tue, 18 Nov 2014 20:41:12 +0300 |
| parents | 3cb3175a6fef |
| children | 5004210e8c78 |
| rev | line source |
|---|---|
| 1649 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4412 | 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 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
21 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
22 #define NGX_RESOLVE_AAAA 28 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
23 #endif |
| 1965 | 24 #define NGX_RESOLVE_DNAME 39 |
| 1649 | 25 |
| 26 #define NGX_RESOLVE_FORMERR 1 | |
| 27 #define NGX_RESOLVE_SERVFAIL 2 | |
| 28 #define NGX_RESOLVE_NXDOMAIN 3 | |
| 29 #define NGX_RESOLVE_NOTIMP 4 | |
| 30 #define NGX_RESOLVE_REFUSED 5 | |
| 31 #define NGX_RESOLVE_TIMEDOUT NGX_ETIMEDOUT | |
| 32 | |
| 33 | |
|
1683
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1649
diff
changeset
|
34 #define NGX_NO_RESOLVER (void *) -1 |
|
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1649
diff
changeset
|
35 |
| 1969 | 36 #define NGX_RESOLVER_MAX_RECURSION 50 |
| 37 | |
|
1683
1e0b028055ec
allow to use IP addresses without defined resolver
Igor Sysoev <igor@sysoev.ru>
parents:
1649
diff
changeset
|
38 |
| 1649 | 39 typedef struct { |
| 40 ngx_connection_t *connection; | |
| 41 struct sockaddr *sockaddr; | |
| 42 socklen_t socklen; | |
| 43 ngx_str_t server; | |
|
3408
71193a456616
add context to a resolver log
Igor Sysoev <igor@sysoev.ru>
parents:
3269
diff
changeset
|
44 ngx_log_t log; |
| 1649 | 45 } ngx_udp_connection_t; |
| 46 | |
| 47 | |
| 48 typedef struct ngx_resolver_ctx_s ngx_resolver_ctx_t; | |
| 49 | |
| 50 typedef void (*ngx_resolver_handler_pt)(ngx_resolver_ctx_t *ctx); | |
| 51 | |
| 52 | |
| 53 typedef struct { | |
| 54 ngx_rbtree_node_t node; | |
| 55 ngx_queue_t queue; | |
| 56 | |
| 57 /* PTR: resolved name, A: name to resolve */ | |
| 58 u_char *name; | |
| 59 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
60 #if (NGX_HAVE_INET6) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
61 /* PTR: IPv6 address to resolve (IPv4 address is in rbtree node key) */ |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
62 struct in6_addr addr6; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
63 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
64 |
| 1649 | 65 u_short nlen; |
| 66 u_short qlen; | |
| 67 | |
| 68 u_char *query; | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
69 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
70 u_char *query6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
71 #endif |
| 1649 | 72 |
| 73 union { | |
| 74 in_addr_t addr; | |
| 75 in_addr_t *addrs; | |
| 76 u_char *cname; | |
| 77 } u; | |
| 78 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
79 u_char code; |
| 1649 | 80 u_short naddrs; |
| 81 u_short cnlen; | |
| 82 | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
83 #if (NGX_HAVE_INET6) |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
84 union { |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
85 struct in6_addr addr6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
86 struct in6_addr *addrs6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
87 } u6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
88 |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
89 u_short naddrs6; |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
90 #endif |
|
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
91 |
| 1649 | 92 time_t expire; |
| 93 time_t valid; | |
|
5477
98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5476
diff
changeset
|
94 uint32_t ttl; |
| 1649 | 95 |
| 96 ngx_resolver_ctx_t *waiting; | |
| 97 } ngx_resolver_node_t; | |
| 98 | |
| 99 | |
| 100 typedef struct { | |
| 101 /* has to be pointer because of "incomplete type" */ | |
| 102 ngx_event_t *event; | |
|
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
103 void *dummy; |
| 1649 | 104 ngx_log_t *log; |
| 105 | |
| 106 /* ident must be after 3 pointers */ | |
| 107 ngx_int_t ident; | |
| 108 | |
|
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
109 /* simple round robin DNS peers balancer */ |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
110 ngx_array_t udp_connections; |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
111 ngx_uint_t last_connection; |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
112 |
| 1649 | 113 ngx_rbtree_t name_rbtree; |
| 114 ngx_rbtree_node_t name_sentinel; | |
| 115 | |
| 116 ngx_rbtree_t addr_rbtree; | |
| 117 ngx_rbtree_node_t addr_sentinel; | |
| 118 | |
| 119 ngx_queue_t name_resend_queue; | |
| 120 ngx_queue_t addr_resend_queue; | |
| 121 | |
| 122 ngx_queue_t name_expire_queue; | |
| 123 ngx_queue_t addr_expire_queue; | |
| 124 | |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
125 #if (NGX_HAVE_INET6) |
|
5478
3cb3175a6fef
The "ipv6=" boolean parameter of the "resolver" directive.
Ruslan Ermilov <ru@nginx.com>
parents:
5477
diff
changeset
|
126 ngx_uint_t ipv6; /* unsigned ipv6:1; */ |
|
5476
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
127 ngx_rbtree_t addr6_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
128 ngx_rbtree_node_t addr6_sentinel; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
129 ngx_queue_t addr6_resend_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
130 ngx_queue_t addr6_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
131 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
132 |
| 1649 | 133 time_t resend_timeout; |
| 134 time_t expire; | |
| 135 time_t valid; | |
| 136 | |
| 137 ngx_uint_t log_level; | |
| 138 } ngx_resolver_t; | |
| 139 | |
| 140 | |
| 141 struct ngx_resolver_ctx_s { | |
| 142 ngx_resolver_ctx_t *next; | |
| 143 ngx_resolver_t *resolver; | |
| 144 ngx_udp_connection_t *udp_connection; | |
| 145 | |
| 146 /* ident must be after 3 pointers */ | |
| 147 ngx_int_t ident; | |
| 148 | |
| 149 ngx_int_t state; | |
| 150 ngx_str_t name; | |
| 151 | |
| 152 ngx_uint_t naddrs; | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
153 ngx_addr_t *addrs; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
154 ngx_addr_t addr; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
155 struct sockaddr_in sin; |
| 1649 | 156 |
| 157 ngx_resolver_handler_pt handler; | |
| 158 void *data; | |
| 159 ngx_msec_t timeout; | |
| 160 | |
| 161 ngx_uint_t quick; /* unsigned quick:1; */ | |
| 1969 | 162 ngx_uint_t recursion; |
| 1649 | 163 ngx_event_t *event; |
| 164 }; | |
| 165 | |
| 166 | |
|
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
167 ngx_resolver_t *ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, |
|
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
168 ngx_uint_t n); |
| 1649 | 169 ngx_resolver_ctx_t *ngx_resolve_start(ngx_resolver_t *r, |
| 170 ngx_resolver_ctx_t *temp); | |
| 171 ngx_int_t ngx_resolve_name(ngx_resolver_ctx_t *ctx); | |
| 172 void ngx_resolve_name_done(ngx_resolver_ctx_t *ctx); | |
| 173 ngx_int_t ngx_resolve_addr(ngx_resolver_ctx_t *ctx); | |
| 174 void ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx); | |
| 175 char *ngx_resolver_strerror(ngx_int_t err); | |
| 176 | |
| 177 | |
| 178 #endif /* _NGX_RESOLVER_H_INCLUDED_ */ |