nginx/src/core/ngx_connection.h

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