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_text_max_len;
23 ngx_str_t addr_text;
24
25 int type;
26
27 int backlog;
28 int rcvbuf;
29 int sndbuf;
30
31 /* handler of accepted connection */
32 ngx_connection_handler_pt handler;
33
34 void *servers; /* array of ngx_http_in_addr_t, for example */
35
36 ngx_log_t log;
37 ngx_log_t *logp;
38
39 size_t pool_size;
40 /* should be here because of the AcceptEx() preread */
41 size_t post_accept_buffer_size;
42 /* should be here because of the deferred accept */
43 ngx_msec_t post_accept_timeout;
44
45 ngx_listening_t *previous;
46 ngx_connection_t *connection;
47
48 unsigned open:1;
49 unsigned remain:1;
50 unsigned ignore:1;
51
52 unsigned bound:1; /* already bound */
53 unsigned inherited:1; /* inherited from previous process */
54 unsigned nonblocking_accept:1;
55 unsigned listen:1;
56 unsigned nonblocking:1;
57 unsigned shared:1; /* shared between threads or processes */
58 unsigned addr_ntop:1;
59
60 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
61 unsigned ipv6only:2;
62 #endif
63
64 #if (NGX_HAVE_DEFERRED_ACCEPT)
65 unsigned deferred_accept:1;
66 unsigned delete_deferred:1;
67 unsigned add_deferred:1;
68 #ifdef SO_ACCEPTFILTER
69 char *accept_filter;
70 #endif
71 #endif
72
73 };
74
75
76 typedef enum {
77 NGX_ERROR_ALERT = 0,
78 NGX_ERROR_ERR,
79 NGX_ERROR_INFO,
80 NGX_ERROR_IGNORE_ECONNRESET,
81 NGX_ERROR_IGNORE_EINVAL
82 } ngx_connection_log_error_e;
83
84
85 typedef enum {
86 NGX_TCP_NODELAY_UNSET = 0,
87 NGX_TCP_NODELAY_SET,
88 NGX_TCP_NODELAY_DISABLED
89 } ngx_connection_tcp_nodelay_e;
90
91
92 typedef enum {
93 NGX_TCP_NOPUSH_UNSET = 0,
94 NGX_TCP_NOPUSH_SET,
95 NGX_TCP_NOPUSH_DISABLED
96 } ngx_connection_tcp_nopush_e;
97
98
99 #define NGX_LOWLEVEL_BUFFERED 0x0f
100 #define NGX_SSL_BUFFERED 0x01
101
102
103 struct ngx_connection_s {
104 void *data;
105 ngx_event_t *read;
106 ngx_event_t *write;
107
108 ngx_socket_t fd;
109
110 ngx_recv_pt recv;
111 ngx_send_pt send;
112 ngx_recv_chain_pt recv_chain;
113 ngx_send_chain_pt send_chain;
114
115 ngx_listening_t *listening;
116
117 off_t sent;
118
119 ngx_log_t *log;
120
121 ngx_pool_t *pool;
122
123 struct sockaddr *sockaddr;
124 socklen_t socklen;
125 ngx_str_t addr_text;
126
127 #if (NGX_SSL)
128 ngx_ssl_connection_t *ssl;
129 #endif
130
131 struct sockaddr *local_sockaddr;
132 socklen_t local_socklen;
133
134 ngx_buf_t *buffer;
135
136 ngx_atomic_uint_t number;
137
138 ngx_uint_t requests;
139
140 unsigned buffered:8;
141
142 unsigned log_error:3; /* ngx_connection_log_error_e */
143
144 unsigned single_connection:1;
145 unsigned unexpected_eof:1;
146 unsigned timedout:1;
147 unsigned error:1;
148 unsigned destroyed:1;
149
150 unsigned idle:1;
151 unsigned close:1;
152
153 unsigned sendfile:1;
154 unsigned sndlowat:1;
155 unsigned tcp_nodelay:2; /* ngx_connection_tcp_nodelay_e */
156 unsigned tcp_nopush:2; /* ngx_connection_tcp_nopush_e */
157
158 #if (NGX_HAVE_IOCP)
159 unsigned accept_context_updated:1;
160 #endif
161
162 #if (NGX_HAVE_AIO_SENDFILE)
163 unsigned aio_sendfile:1;
164 ngx_buf_t *busy_sendfile;
165 #endif
166
167 #if (NGX_THREADS)
168 ngx_atomic_t lock;
169 #endif
170 };
171
172
173 ngx_listening_t *ngx_create_listening(ngx_conf_t *cf, void *sockaddr,
174 socklen_t socklen);
175 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle);
176 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle);
177 void ngx_configure_listening_sockets(ngx_cycle_t *cycle);
178 void ngx_close_listening_sockets(ngx_cycle_t *cycle);
179 void ngx_close_connection(ngx_connection_t *c);
180 ngx_int_t ngx_connection_local_sockaddr(ngx_connection_t *c, ngx_str_t *s,
181 ngx_uint_t port);
182 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text);
183
184 ngx_connection_t *ngx_get_connection(ngx_socket_t s, ngx_log_t *log);
185 void ngx_free_connection(ngx_connection_t *c);
186
187
188 #endif /* _NGX_CONNECTION_H_INCLUDED_ */
189
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