1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #ifndef _NGX_CONNECTION_H_INCLUDED_
8 #define _NGX_CONNECTION_H_INCLUDED_
9
10
11 #include <ngx_config.h>
12 #include <ngx_core.h>
13
14
15 typedef struct ngx_listening_s ngx_listening_t;
16
17 struct ngx_listening_s {
18 ngx_socket_t fd;
19
20 struct sockaddr *sockaddr;
21 socklen_t socklen; /* size of sockaddr */
22 size_t addr; /* offset to address in sockaddr */
23 size_t addr_text_max_len;
24 ngx_str_t addr_text;
25
26 int family;
27 int type;
28
29 int backlog;
30 int rcvbuf;
31 int sndbuf;
32
33 /* handler of accepted connection */
34 ngx_connection_handler_pt handler;
35
36 void *servers; /* array of ngx_http_in_addr_t, for example */
37
38 ngx_log_t log;
39
40 size_t pool_size;
41 /* should be here because of the AcceptEx() preread */
42 size_t post_accept_buffer_size;
43 /* should be here because of the deferred accept */
44 ngx_msec_t post_accept_timeout;
45
46 ngx_listening_t *previous;
47 ngx_connection_t *connection;
48
49 unsigned open:1;
50 unsigned remain:1;
51 unsigned ignore:1;
52
53 unsigned bound:1; /* already bound */
54 unsigned inherited:1; /* inherited from previous process */
55 unsigned nonblocking_accept:1;
56 unsigned listen:1;
57 unsigned nonblocking:1;
58 unsigned shared:1; /* shared between threads or processes */
59 unsigned addr_ntop:1;
60
61 #if (NGX_HAVE_DEFERRED_ACCEPT)
62 unsigned deferred_accept:1;
63 unsigned delete_deferred:1;
64 unsigned add_deferred:1;
65 #ifdef SO_ACCEPTFILTER
66 char *accept_filter;
67 #endif
68 #endif
69
70 };
71
72
73 typedef enum {
74 NGX_ERROR_CRIT = 0,
75 NGX_ERROR_ERR,
76 NGX_ERROR_INFO,
77 NGX_ERROR_IGNORE_ECONNRESET
78 } ngx_connection_log_error_e;
79
80
81 typedef enum {
82 NGX_TCP_NODELAY_UNSET = 0,
83 NGX_TCP_NODELAY_SET,
84 NGX_TCP_NODELAY_DISABLED
85 } ngx_connection_tcp_nodelay_e;
86
87
88 typedef enum {
89 NGX_TCP_NOPUSH_UNSET = 0,
90 NGX_TCP_NOPUSH_SET,
91 NGX_TCP_NOPUSH_DISABLED
92 } ngx_connection_tcp_nopush_e;
93
94
95 #define NGX_LOWLEVEL_BUFFERED 0x0f
96 #define NGX_SSL_BUFFERED 0x01
97
98
99 struct ngx_connection_s {
100 void *data;
101 ngx_event_t *read;
102 ngx_event_t *write;
103
104 ngx_socket_t fd;
105
106 ngx_recv_pt recv;
107 ngx_send_pt send;
108 ngx_recv_chain_pt recv_chain;
109 ngx_send_chain_pt send_chain;
110
111 ngx_listening_t *listening;
112
113 off_t sent;
114
115 ngx_log_t *log;
116
117 ngx_pool_t *pool;
118
119 struct sockaddr *sockaddr;
120 socklen_t socklen;
121 ngx_str_t addr_text;
122
123 #if (NGX_SSL)
124 ngx_ssl_connection_t *ssl;
125 #endif
126
127 #if (NGX_HAVE_IOCP)
128 struct sockaddr *local_sockaddr;
129 socklen_t local_socklen;
130 #endif
131
132 ngx_buf_t *buffer;
133
134 ngx_atomic_uint_t number;
135
136 unsigned buffered:8;
137
138 unsigned log_error:2; /* ngx_connection_log_error_e */
139
140 unsigned single_connection:1;
141 unsigned unexpected_eof:1;
142 unsigned timedout:1;
143 unsigned error:1;
144 unsigned destroyed:1;
145
146 unsigned idle:1;
147 unsigned close:1;
148
149 unsigned sendfile:1;
150 unsigned sndlowat:1;
151 unsigned tcp_nodelay:2; /* ngx_connection_tcp_nodelay_e */
152 unsigned tcp_nopush:2; /* ngx_connection_tcp_nopush_e */
153
154 #if (NGX_HAVE_IOCP)
155 unsigned accept_context_updated:1;
156 #endif
157
158 #if (NGX_THREADS)
159 ngx_atomic_t lock;
160 #endif
161 };
162
163
164 #ifndef ngx_ssl_set_nosendshut
165 #define ngx_ssl_set_nosendshut(ssl)
166 #endif
167
168
169 ngx_listening_t *ngx_listening_inet_stream_socket(ngx_conf_t *cf,
170 in_addr_t addr, in_port_t port);
171 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle);
172 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle);
173 void ngx_configure_listening_socket(ngx_cycle_t *cycle);
174 void ngx_close_listening_sockets(ngx_cycle_t *cycle);
175 void ngx_close_connection(ngx_connection_t *c);
176 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text);
177
178 ngx_connection_t *ngx_get_connection(ngx_socket_t s, ngx_log_t *log);
179 void ngx_free_connection(ngx_connection_t *c);
180
181
182 #endif /* _NGX_CONNECTION_H_INCLUDED_ */
183
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