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view src/stream/ngx_stream_upstream.h @ 6785:d1d0dd69a419

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Upstream: added the ngx_http_upstream_resolved_t.name field. This fixes inconsistency in what is stored in the "host" field. Normally it would contain the "host" part of the parsed URL (e.g., proxy_pass with variables), but for the case of an implicit upstream specified with literal address it contained the text representation of the socket address (that is, host including port for IP). Now the "host" field always contains the "host" part of the URL, while the text representation of the socket address is stored in the newly added "name" field. The ngx_http_upstream_create_round_robin_peer() function was modified accordingly in a way to be compatible with the code that does not know about the new "name" field. The "stream" code was similarly modified except for not adding compatibility in ngx_stream_upstream_create_round_robin_peer(). This change is also a prerequisite for the next change.
author Ruslan Ermilov <ru@nginx.com>
date Mon, 31 Oct 2016 18:33:33 +0300
parents f41c2530dd17
children 54cf51c4f07a
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_STREAM_UPSTREAM_H_INCLUDED_
#define _NGX_STREAM_UPSTREAM_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
#include <ngx_event_connect.h>


#define NGX_STREAM_UPSTREAM_CREATE        0x0001
#define NGX_STREAM_UPSTREAM_WEIGHT        0x0002
#define NGX_STREAM_UPSTREAM_MAX_FAILS     0x0004
#define NGX_STREAM_UPSTREAM_FAIL_TIMEOUT  0x0008
#define NGX_STREAM_UPSTREAM_DOWN          0x0010
#define NGX_STREAM_UPSTREAM_BACKUP        0x0020
#define NGX_STREAM_UPSTREAM_MAX_CONNS     0x0100


typedef struct {
    ngx_array_t                        upstreams;
                                           /* ngx_stream_upstream_srv_conf_t */
} ngx_stream_upstream_main_conf_t;


typedef struct ngx_stream_upstream_srv_conf_s  ngx_stream_upstream_srv_conf_t;


typedef ngx_int_t (*ngx_stream_upstream_init_pt)(ngx_conf_t *cf,
    ngx_stream_upstream_srv_conf_t *us);
typedef ngx_int_t (*ngx_stream_upstream_init_peer_pt)(ngx_stream_session_t *s,
    ngx_stream_upstream_srv_conf_t *us);


typedef struct {
    ngx_stream_upstream_init_pt        init_upstream;
    ngx_stream_upstream_init_peer_pt   init;
    void                              *data;
} ngx_stream_upstream_peer_t;


typedef struct {
    ngx_str_t                          name;
    ngx_addr_t                        *addrs;
    ngx_uint_t                         naddrs;
    ngx_uint_t                         weight;
    ngx_uint_t                         max_conns;
    ngx_uint_t                         max_fails;
    time_t                             fail_timeout;
    ngx_msec_t                         slow_start;

    unsigned                           down:1;
    unsigned                           backup:1;

    NGX_COMPAT_BEGIN(4)
    NGX_COMPAT_END
} ngx_stream_upstream_server_t;


struct ngx_stream_upstream_srv_conf_s {
    ngx_stream_upstream_peer_t         peer;
    void                             **srv_conf;

    ngx_array_t                       *servers;
                                              /* ngx_stream_upstream_server_t */

    ngx_uint_t                         flags;
    ngx_str_t                          host;
    u_char                            *file_name;
    ngx_uint_t                         line;
    in_port_t                          port;
    ngx_uint_t                         no_port;  /* unsigned no_port:1 */

#if (NGX_STREAM_UPSTREAM_ZONE)
    ngx_shm_zone_t                    *shm_zone;
#endif
};


typedef struct {
    ngx_msec_t                         response_time;
    ngx_msec_t                         connect_time;
    ngx_msec_t                         first_byte_time;
    off_t                              bytes_sent;
    off_t                              bytes_received;

    ngx_str_t                         *peer;
} ngx_stream_upstream_state_t;


typedef struct {
    ngx_str_t                          host;
    in_port_t                          port;
    ngx_uint_t                         no_port; /* unsigned no_port:1 */

    ngx_uint_t                         naddrs;
    ngx_resolver_addr_t               *addrs;

    struct sockaddr                   *sockaddr;
    socklen_t                          socklen;
    ngx_str_t                          name;

    ngx_resolver_ctx_t                *ctx;
} ngx_stream_upstream_resolved_t;


typedef struct {
    ngx_peer_connection_t              peer;

    ngx_buf_t                          downstream_buf;
    ngx_buf_t                          upstream_buf;

    ngx_chain_t                       *free;
    ngx_chain_t                       *upstream_out;
    ngx_chain_t                       *upstream_busy;
    ngx_chain_t                       *downstream_out;
    ngx_chain_t                       *downstream_busy;

    off_t                              received;
    time_t                             start_sec;
    ngx_uint_t                         responses;

    ngx_str_t                          ssl_name;

    ngx_stream_upstream_srv_conf_t    *upstream;
    ngx_stream_upstream_resolved_t    *resolved;
    ngx_stream_upstream_state_t       *state;
    unsigned                           connected:1;
    unsigned                           proxy_protocol:1;
} ngx_stream_upstream_t;


ngx_stream_upstream_srv_conf_t *ngx_stream_upstream_add(ngx_conf_t *cf,
    ngx_url_t *u, ngx_uint_t flags);


#define ngx_stream_conf_upstream_srv_conf(uscf, module)                       \
    uscf->srv_conf[module.ctx_index]


extern ngx_module_t  ngx_stream_upstream_module;


#endif /* _NGX_STREAM_UPSTREAM_H_INCLUDED_ */