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;       /* offset to address in sockaddr */
  23     size_t              addr_text_max_len;
  24     ngx_str_t           addr_text;
  25
  26     int                 type;
  27
  28     int                 backlog;
  29     int                 rcvbuf;
  30     int                 sndbuf;
  31
  32     /* handler of accepted connection */
  33     ngx_connection_handler_pt   handler;
  34
  35     void               *servers;  /* array of ngx_http_in_addr_t, for example */
  36
  37     ngx_log_t           log;
  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_DEFERRED_ACCEPT)
  61     unsigned            deferred_accept:1;
  62     unsigned            delete_deferred:1;
  63     unsigned            add_deferred:1;
  64 #ifdef SO_ACCEPTFILTER
  65     char               *accept_filter;
  66 #endif
  67 #endif
  68
  69 };
  70
  71
  72 typedef enum {
  73      NGX_ERROR_CRIT = 0,
  74      NGX_ERROR_ERR,
  75      NGX_ERROR_INFO,
  76      NGX_ERROR_IGNORE_ECONNRESET
  77 } ngx_connection_log_error_e;
  78
  79
  80 typedef enum {
  81      NGX_TCP_NODELAY_UNSET = 0,
  82      NGX_TCP_NODELAY_SET,
  83      NGX_TCP_NODELAY_DISABLED
  84 } ngx_connection_tcp_nodelay_e;
  85
  86
  87 typedef enum {
  88      NGX_TCP_NOPUSH_UNSET = 0,
  89      NGX_TCP_NOPUSH_SET,
  90      NGX_TCP_NOPUSH_DISABLED
  91 } ngx_connection_tcp_nopush_e;
  92
  93
  94 #define NGX_LOWLEVEL_BUFFERED  0x0f
  95 #define NGX_SSL_BUFFERED       0x01
  96
  97
  98 struct ngx_connection_s {
  99     void               *data;
 100     ngx_event_t        *read;
 101     ngx_event_t        *write;
 102
 103     ngx_socket_t        fd;
 104
 105     ngx_recv_pt         recv;
 106     ngx_send_pt         send;
 107     ngx_recv_chain_pt   recv_chain;
 108     ngx_send_chain_pt   send_chain;
 109
 110     ngx_listening_t    *listening;
 111
 112     off_t               sent;
 113
 114     ngx_log_t          *log;
 115
 116     ngx_pool_t         *pool;
 117
 118     struct sockaddr    *sockaddr;
 119     socklen_t           socklen;
 120     ngx_str_t           addr_text;
 121
 122 #if (NGX_SSL)
 123     ngx_ssl_connection_t  *ssl;
 124 #endif
 125
 126 #if (NGX_HAVE_IOCP)
 127     struct sockaddr    *local_sockaddr;
 128     socklen_t           local_socklen;
 129 #endif
 130
 131     ngx_buf_t          *buffer;
 132
 133     ngx_atomic_uint_t   number;
 134
 135     unsigned            buffered:8;
 136
 137     unsigned            log_error:2;     /* ngx_connection_log_error_e */
 138
 139     unsigned            single_connection:1;
 140     unsigned            unexpected_eof:1;
 141     unsigned            timedout:1;
 142     unsigned            error:1;
 143     unsigned            destroyed:1;
 144
 145     unsigned            idle:1;
 146     unsigned            close:1;
 147
 148     unsigned            sendfile:1;
 149     unsigned            sndlowat:1;
 150     unsigned            tcp_nodelay:2;   /* ngx_connection_tcp_nodelay_e */
 151     unsigned            tcp_nopush:2;    /* ngx_connection_tcp_nopush_e */
 152
 153 #if (NGX_HAVE_IOCP)
 154     unsigned            accept_context_updated:1;
 155 #endif
 156
 157 #if (NGX_THREADS)
 158     ngx_atomic_t        lock;
 159 #endif
 160 };
 161
 162
 163 #ifndef ngx_ssl_set_nosendshut
 164 #define ngx_ssl_set_nosendshut(ssl)
 165 #endif
 166
 167
 168 ngx_listening_t *ngx_listening_inet_stream_socket(ngx_conf_t *cf,
 169     in_addr_t addr, in_port_t port);
 170 ngx_int_t ngx_set_inherited_sockets(ngx_cycle_t *cycle);
 171 ngx_int_t ngx_open_listening_sockets(ngx_cycle_t *cycle);
 172 void ngx_configure_listening_socket(ngx_cycle_t *cycle);
 173 void ngx_close_listening_sockets(ngx_cycle_t *cycle);
 174 void ngx_close_connection(ngx_connection_t *c);
 175 ngx_int_t ngx_connection_error(ngx_connection_t *c, ngx_err_t err, char *text);
 176
 177 ngx_connection_t *ngx_get_connection(ngx_socket_t s, ngx_log_t *log);
 178 void ngx_free_connection(ngx_connection_t *c);
 179
 180
 181 #endif /* _NGX_CONNECTION_H_INCLUDED_ */