Mercurial > hg > nginx-quic
annotate src/core/ngx_resolver.h @ 6230:2a621245f4cf
Win32: MSVC 2015 compatibility.
Resolved warnings about declarations that hide previous local declarations.
Warnings about WSASocketA() being deprecated resolved by explicit use of
WSASocketW() instead of WSASocket(). When compiling without IPv6 support,
WinSock deprecated warnings are disabled to allow use of gethostbyname().
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Mon, 17 Aug 2015 18:09:17 +0300 |
| parents | 5004210e8c78 |
| children | 7316c57e4fe7 |
| 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 | |
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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 |
| 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 | |
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34 #define NGX_NO_RESOLVER (void *) -1 |
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35 |
| 1969 | 36 #define NGX_RESOLVER_MAX_RECURSION 50 |
| 37 | |
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38 |
| 1649 | 39 typedef struct { |
| 40 ngx_connection_t *connection; | |
| 41 struct sockaddr *sockaddr; | |
| 42 socklen_t socklen; | |
| 43 ngx_str_t server; | |
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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 { | |
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54 /* PTR: resolved name, A: name to resolve */ |
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55 u_char *name; |
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56 |
| 1649 | 57 ngx_queue_t queue; |
| 58 | |
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59 /* event ident must be after 3 pointers as in ngx_connection_t */ |
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60 ngx_int_t ident; |
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61 |
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62 ngx_rbtree_node_t node; |
| 1649 | 63 |
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64 #if (NGX_HAVE_INET6) |
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65 /* PTR: IPv6 address to resolve (IPv4 address is in rbtree node key) */ |
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66 struct in6_addr addr6; |
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67 #endif |
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68 |
| 1649 | 69 u_short nlen; |
| 70 u_short qlen; | |
| 71 | |
| 72 u_char *query; | |
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73 #if (NGX_HAVE_INET6) |
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74 u_char *query6; |
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75 #endif |
| 1649 | 76 |
| 77 union { | |
| 78 in_addr_t addr; | |
| 79 in_addr_t *addrs; | |
| 80 u_char *cname; | |
| 81 } u; | |
| 82 | |
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83 u_char code; |
| 1649 | 84 u_short naddrs; |
| 85 u_short cnlen; | |
| 86 | |
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87 #if (NGX_HAVE_INET6) |
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88 union { |
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89 struct in6_addr addr6; |
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90 struct in6_addr *addrs6; |
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91 } u6; |
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92 |
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93 u_short naddrs6; |
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94 #endif |
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95 |
| 1649 | 96 time_t expire; |
| 97 time_t valid; | |
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98 uint32_t ttl; |
| 1649 | 99 |
| 100 ngx_resolver_ctx_t *waiting; | |
| 101 } ngx_resolver_node_t; | |
| 102 | |
| 103 | |
| 104 typedef struct { | |
| 105 /* has to be pointer because of "incomplete type" */ | |
| 106 ngx_event_t *event; | |
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107 void *dummy; |
| 1649 | 108 ngx_log_t *log; |
| 109 | |
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110 /* event ident must be after 3 pointers as in ngx_connection_t */ |
| 1649 | 111 ngx_int_t ident; |
| 112 | |
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113 /* simple round robin DNS peers balancer */ |
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114 ngx_array_t udp_connections; |
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115 ngx_uint_t last_connection; |
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116 |
| 1649 | 117 ngx_rbtree_t name_rbtree; |
| 118 ngx_rbtree_node_t name_sentinel; | |
| 119 | |
| 120 ngx_rbtree_t addr_rbtree; | |
| 121 ngx_rbtree_node_t addr_sentinel; | |
| 122 | |
| 123 ngx_queue_t name_resend_queue; | |
| 124 ngx_queue_t addr_resend_queue; | |
| 125 | |
| 126 ngx_queue_t name_expire_queue; | |
| 127 ngx_queue_t addr_expire_queue; | |
| 128 | |
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129 #if (NGX_HAVE_INET6) |
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130 ngx_uint_t ipv6; /* unsigned ipv6:1; */ |
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131 ngx_rbtree_t addr6_rbtree; |
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132 ngx_rbtree_node_t addr6_sentinel; |
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133 ngx_queue_t addr6_resend_queue; |
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134 ngx_queue_t addr6_expire_queue; |
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135 #endif |
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136 |
| 1649 | 137 time_t resend_timeout; |
| 138 time_t expire; | |
| 139 time_t valid; | |
| 140 | |
| 141 ngx_uint_t log_level; | |
| 142 } ngx_resolver_t; | |
| 143 | |
| 144 | |
| 145 struct ngx_resolver_ctx_s { | |
| 146 ngx_resolver_ctx_t *next; | |
| 147 ngx_resolver_t *resolver; | |
| 148 ngx_udp_connection_t *udp_connection; | |
| 149 | |
| 150 ngx_int_t state; | |
| 151 ngx_str_t name; | |
| 152 | |
| 153 ngx_uint_t naddrs; | |
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154 ngx_addr_t *addrs; |
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155 ngx_addr_t addr; |
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156 struct sockaddr_in sin; |
| 1649 | 157 |
| 158 ngx_resolver_handler_pt handler; | |
| 159 void *data; | |
| 160 ngx_msec_t timeout; | |
| 161 | |
| 162 ngx_uint_t quick; /* unsigned quick:1; */ | |
| 1969 | 163 ngx_uint_t recursion; |
| 1649 | 164 ngx_event_t *event; |
| 165 }; | |
| 166 | |
| 167 | |
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168 ngx_resolver_t *ngx_resolver_create(ngx_conf_t *cf, ngx_str_t *names, |
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169 ngx_uint_t n); |
| 1649 | 170 ngx_resolver_ctx_t *ngx_resolve_start(ngx_resolver_t *r, |
| 171 ngx_resolver_ctx_t *temp); | |
| 172 ngx_int_t ngx_resolve_name(ngx_resolver_ctx_t *ctx); | |
| 173 void ngx_resolve_name_done(ngx_resolver_ctx_t *ctx); | |
| 174 ngx_int_t ngx_resolve_addr(ngx_resolver_ctx_t *ctx); | |
| 175 void ngx_resolve_addr_done(ngx_resolver_ctx_t *ctx); | |
| 176 char *ngx_resolver_strerror(ngx_int_t err); | |
| 177 | |
| 178 | |
| 179 #endif /* _NGX_RESOLVER_H_INCLUDED_ */ |