Mercurial > hg > nginx
annotate src/core/ngx_resolver.h @ 5477:98876ce2a7fd
Resolver: implemented IPv6 name to address resolving.
| author | Ruslan Ermilov <ru@nginx.com> |
|---|---|
| date | Mon, 09 Dec 2013 10:53:28 +0400 |
| parents | 950c9ed3e66f |
| children | 3cb3175a6fef |
| 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) |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
126 ngx_rbtree_t addr6_rbtree; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
127 ngx_rbtree_node_t addr6_sentinel; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
128 ngx_queue_t addr6_resend_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
129 ngx_queue_t addr6_expire_queue; |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
130 #endif |
|
950c9ed3e66f
Resolver: implemented IPv6 address to name resolving.
Ruslan Ermilov <ru@nginx.com>
parents:
5475
diff
changeset
|
131 |
| 1649 | 132 time_t resend_timeout; |
| 133 time_t expire; | |
| 134 time_t valid; | |
| 135 | |
| 136 ngx_uint_t log_level; | |
| 137 } ngx_resolver_t; | |
| 138 | |
| 139 | |
| 140 struct ngx_resolver_ctx_s { | |
| 141 ngx_resolver_ctx_t *next; | |
| 142 ngx_resolver_t *resolver; | |
| 143 ngx_udp_connection_t *udp_connection; | |
| 144 | |
| 145 /* ident must be after 3 pointers */ | |
| 146 ngx_int_t ident; | |
| 147 | |
| 148 ngx_int_t state; | |
| 149 ngx_str_t name; | |
| 150 | |
| 151 ngx_uint_t naddrs; | |
|
5475
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
152 ngx_addr_t *addrs; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
153 ngx_addr_t addr; |
|
07dd5bd222ac
Changed resolver API to use ngx_addr_t.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
154 struct sockaddr_in sin; |
| 1649 | 155 |
| 156 ngx_resolver_handler_pt handler; | |
| 157 void *data; | |
| 158 ngx_msec_t timeout; | |
| 159 | |
| 160 ngx_uint_t quick; /* unsigned quick:1; */ | |
| 1969 | 161 ngx_uint_t recursion; |
| 1649 | 162 ngx_event_t *event; |
| 163 }; | |
| 164 | |
| 165 | |
|
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
|
166 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
|
167 ngx_uint_t n); |
| 1649 | 168 ngx_resolver_ctx_t *ngx_resolve_start(ngx_resolver_t *r, |
| 169 ngx_resolver_ctx_t *temp); | |
| 170 ngx_int_t ngx_resolve_name(ngx_resolver_ctx_t *ctx); | |
| 171 void ngx_resolve_name_done(ngx_resolver_ctx_t *ctx); | |
| 172 ngx_int_t ngx_resolve_addr(ngx_resolver_ctx_t *ctx); | |
| 173 void ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx); | |
| 174 char *ngx_resolver_strerror(ngx_int_t err); | |
| 175 | |
| 176 | |
| 177 #endif /* _NGX_RESOLVER_H_INCLUDED_ */ |