Mercurial > hg > nginx
annotate src/core/ngx_resolver.h @ 6458:384154fc634f
Resolver: added support for SRV records.
author | Dmitry Volyntsev <xeioex@nginx.com> |
---|---|
date | Wed, 23 Mar 2016 17:44:36 +0300 |
parents | c94aba230a5a |
children | c3e3de6d2672 |
rev | line source |
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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 | |
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21 #if (NGX_HAVE_INET6) |
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22 #define NGX_RESOLVE_AAAA 28 |
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23 #endif |
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24 #define NGX_RESOLVE_SRV 33 |
1965 | 25 #define NGX_RESOLVE_DNAME 39 |
1649 | 26 |
27 #define NGX_RESOLVE_FORMERR 1 | |
28 #define NGX_RESOLVE_SERVFAIL 2 | |
29 #define NGX_RESOLVE_NXDOMAIN 3 | |
30 #define NGX_RESOLVE_NOTIMP 4 | |
31 #define NGX_RESOLVE_REFUSED 5 | |
32 #define NGX_RESOLVE_TIMEDOUT NGX_ETIMEDOUT | |
33 | |
34 | |
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35 #define NGX_NO_RESOLVER (void *) -1 |
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36 |
1969 | 37 #define NGX_RESOLVER_MAX_RECURSION 50 |
38 | |
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39 |
6367 | 40 typedef struct ngx_resolver_s ngx_resolver_t; |
41 | |
42 | |
1649 | 43 typedef struct { |
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44 ngx_connection_t *udp; |
6367 | 45 ngx_connection_t *tcp; |
1649 | 46 struct sockaddr *sockaddr; |
47 socklen_t socklen; | |
48 ngx_str_t server; | |
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49 ngx_log_t log; |
6367 | 50 ngx_buf_t *read_buf; |
51 ngx_buf_t *write_buf; | |
52 ngx_resolver_t *resolver; | |
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53 } ngx_resolver_connection_t; |
1649 | 54 |
55 | |
56 typedef struct ngx_resolver_ctx_s ngx_resolver_ctx_t; | |
57 | |
58 typedef void (*ngx_resolver_handler_pt)(ngx_resolver_ctx_t *ctx); | |
59 | |
60 | |
61 typedef struct { | |
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62 struct sockaddr *sockaddr; |
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63 socklen_t socklen; |
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64 ngx_str_t name; |
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65 u_short priority; |
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66 u_short weight; |
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67 } ngx_resolver_addr_t; |
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68 |
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69 |
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70 typedef struct { |
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71 ngx_str_t name; |
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72 u_short priority; |
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73 u_short weight; |
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74 u_short port; |
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75 } ngx_resolver_srv_t; |
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76 |
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77 |
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78 typedef struct { |
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79 ngx_str_t name; |
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80 u_short priority; |
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81 u_short weight; |
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82 u_short port; |
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83 |
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84 ngx_resolver_ctx_t *ctx; |
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85 |
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86 ngx_uint_t naddrs; |
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87 ngx_addr_t *addrs; |
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88 } ngx_resolver_srv_name_t; |
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89 |
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90 |
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91 typedef struct { |
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92 ngx_rbtree_node_t node; |
1649 | 93 ngx_queue_t queue; |
94 | |
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95 /* PTR: resolved name, A: name to resolve */ |
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96 u_char *name; |
1649 | 97 |
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98 #if (NGX_HAVE_INET6) |
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99 /* PTR: IPv6 address to resolve (IPv4 address is in rbtree node key) */ |
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100 struct in6_addr addr6; |
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101 #endif |
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102 |
1649 | 103 u_short nlen; |
104 u_short qlen; | |
105 | |
106 u_char *query; | |
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107 #if (NGX_HAVE_INET6) |
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108 u_char *query6; |
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109 #endif |
1649 | 110 |
111 union { | |
112 in_addr_t addr; | |
113 in_addr_t *addrs; | |
114 u_char *cname; | |
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115 ngx_resolver_srv_t *srvs; |
1649 | 116 } u; |
117 | |
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118 u_char code; |
1649 | 119 u_short naddrs; |
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120 u_short nsrvs; |
1649 | 121 u_short cnlen; |
122 | |
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123 #if (NGX_HAVE_INET6) |
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124 union { |
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125 struct in6_addr addr6; |
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126 struct in6_addr *addrs6; |
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127 } u6; |
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128 |
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129 u_short naddrs6; |
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130 #endif |
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131 |
1649 | 132 time_t expire; |
133 time_t valid; | |
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134 uint32_t ttl; |
1649 | 135 |
6367 | 136 unsigned tcp:1; |
137 #if (NGX_HAVE_INET6) | |
138 unsigned tcp6:1; | |
139 #endif | |
140 | |
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141 ngx_uint_t last_connection; |
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142 |
1649 | 143 ngx_resolver_ctx_t *waiting; |
144 } ngx_resolver_node_t; | |
145 | |
146 | |
6367 | 147 struct ngx_resolver_s { |
1649 | 148 /* has to be pointer because of "incomplete type" */ |
149 ngx_event_t *event; | |
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150 void *dummy; |
1649 | 151 ngx_log_t *log; |
152 | |
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153 /* event ident must be after 3 pointers as in ngx_connection_t */ |
1649 | 154 ngx_int_t ident; |
155 | |
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156 /* simple round robin DNS peers balancer */ |
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157 ngx_array_t connections; |
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158 ngx_uint_t last_connection; |
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159 |
1649 | 160 ngx_rbtree_t name_rbtree; |
161 ngx_rbtree_node_t name_sentinel; | |
162 | |
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163 ngx_rbtree_t srv_rbtree; |
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164 ngx_rbtree_node_t srv_sentinel; |
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165 |
1649 | 166 ngx_rbtree_t addr_rbtree; |
167 ngx_rbtree_node_t addr_sentinel; | |
168 | |
169 ngx_queue_t name_resend_queue; | |
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170 ngx_queue_t srv_resend_queue; |
1649 | 171 ngx_queue_t addr_resend_queue; |
172 | |
173 ngx_queue_t name_expire_queue; | |
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174 ngx_queue_t srv_expire_queue; |
1649 | 175 ngx_queue_t addr_expire_queue; |
176 | |
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177 #if (NGX_HAVE_INET6) |
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178 ngx_uint_t ipv6; /* unsigned ipv6:1; */ |
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179 ngx_rbtree_t addr6_rbtree; |
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180 ngx_rbtree_node_t addr6_sentinel; |
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181 ngx_queue_t addr6_resend_queue; |
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182 ngx_queue_t addr6_expire_queue; |
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183 #endif |
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184 |
1649 | 185 time_t resend_timeout; |
6367 | 186 time_t tcp_timeout; |
1649 | 187 time_t expire; |
188 time_t valid; | |
189 | |
190 ngx_uint_t log_level; | |
6367 | 191 }; |
1649 | 192 |
193 | |
194 struct ngx_resolver_ctx_s { | |
195 ngx_resolver_ctx_t *next; | |
196 ngx_resolver_t *resolver; | |
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197 ngx_resolver_node_t *node; |
1649 | 198 |
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199 /* event ident must be after 3 pointers as in ngx_connection_t */ |
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200 ngx_int_t ident; |
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201 |
1649 | 202 ngx_int_t state; |
203 ngx_str_t name; | |
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204 ngx_str_t service; |
1649 | 205 |
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206 time_t valid; |
1649 | 207 ngx_uint_t naddrs; |
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208 ngx_resolver_addr_t *addrs; |
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209 ngx_resolver_addr_t addr; |
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210 struct sockaddr_in sin; |
1649 | 211 |
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212 ngx_uint_t count; |
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213 ngx_uint_t nsrvs; |
384154fc634f
Resolver: added support for SRV records.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
6456
diff
changeset
|
214 ngx_resolver_srv_name_t *srvs; |
384154fc634f
Resolver: added support for SRV records.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
6456
diff
changeset
|
215 |
1649 | 216 ngx_resolver_handler_pt handler; |
217 void *data; | |
218 ngx_msec_t timeout; | |
219 | |
220 ngx_uint_t quick; /* unsigned quick:1; */ | |
1969 | 221 ngx_uint_t recursion; |
1649 | 222 ngx_event_t *event; |
223 }; | |
224 | |
225 | |
4225
016352c19049
Support of several servers in the "resolver" directive.
Igor Sysoev <igor@sysoev.ru>
parents:
3408
diff
changeset
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226 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
|
227 ngx_uint_t n); |
1649 | 228 ngx_resolver_ctx_t *ngx_resolve_start(ngx_resolver_t *r, |
229 ngx_resolver_ctx_t *temp); | |
230 ngx_int_t ngx_resolve_name(ngx_resolver_ctx_t *ctx); | |
231 void ngx_resolve_name_done(ngx_resolver_ctx_t *ctx); | |
232 ngx_int_t ngx_resolve_addr(ngx_resolver_ctx_t *ctx); | |
233 void ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx); | |
234 char *ngx_resolver_strerror(ngx_int_t err); | |
235 | |
236 | |
237 #endif /* _NGX_RESOLVER_H_INCLUDED_ */ |