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ngx_tcp_upstream.h
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#ifndef _NGX_TCP_UPSTREAM_H_INCLUDED_
#define _NGX_TCP_UPSTREAM_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
#include <ngx_event_connect.h>
#include <ngx_event_pipe.h>
#include <ngx_tcp.h>
#define NGX_TCP_UPSTREAM_FT_ERROR 0x00000002
#define NGX_TCP_UPSTREAM_FT_TIMEOUT 0x00000004
#define NGX_TCP_UPSTREAM_FT_INVALID_HEADER 0x00000008
#define NGX_TCP_UPSTREAM_FT_TCP_500 0x00000010
#define NGX_TCP_UPSTREAM_FT_TCP_502 0x00000020
#define NGX_TCP_UPSTREAM_FT_TCP_503 0x00000040
#define NGX_TCP_UPSTREAM_FT_TCP_504 0x00000080
#define NGX_TCP_UPSTREAM_FT_TCP_404 0x00000100
#define NGX_TCP_UPSTREAM_FT_UPDATING 0x00000200
#define NGX_TCP_UPSTREAM_FT_BUSY_LOCK 0x00000400
#define NGX_TCP_UPSTREAM_FT_MAX_WAITING 0x00000800
#define NGX_TCP_UPSTREAM_FT_NOLIVE 0x40000000
#define NGX_TCP_UPSTREAM_FT_OFF 0x80000000
#define NGX_TCP_UPSTREAM_FT_STATUS (NGX_TCP_UPSTREAM_FT_TCP_500 \
|NGX_TCP_UPSTREAM_FT_TCP_502 \
|NGX_TCP_UPSTREAM_FT_TCP_503 \
|NGX_TCP_UPSTREAM_FT_TCP_504 \
|NGX_TCP_UPSTREAM_FT_TCP_404)
#define NGX_TCP_UPSTREAM_INVALID_HEADER 40
#define NGX_TCP_UPSTREAM_IGN_XA_REDIRECT 0x00000002
#define NGX_TCP_UPSTREAM_IGN_XA_EXPIRES 0x00000004
#define NGX_TCP_UPSTREAM_IGN_EXPIRES 0x00000008
#define NGX_TCP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010
typedef struct {
ngx_msec_t bl_time;
ngx_uint_t bl_state;
ngx_uint_t status;
time_t response_sec;
ngx_uint_t response_msec;
ngx_str_t *peer;
} ngx_tcp_upstream_state_t;
typedef struct {
ngx_uint_t check_shm_size;
ngx_tcp_check_peers_conf_t *peers_conf;
ngx_array_t upstreams; /* ngx_tcp_upstream_srv_conf_t */
} ngx_tcp_upstream_main_conf_t;
typedef ngx_int_t (*ngx_tcp_upstream_init_pt)(ngx_conf_t *cf,
ngx_tcp_upstream_srv_conf_t *us);
typedef ngx_int_t (*ngx_tcp_upstream_init_peer_pt)(ngx_tcp_session_t *s,
ngx_tcp_upstream_srv_conf_t *us);
typedef struct {
ngx_tcp_upstream_init_pt init_upstream;
ngx_tcp_upstream_init_peer_pt init;
void *data;
} ngx_tcp_upstream_peer_t;
typedef struct {
ngx_peer_addr_t *addrs;
ngx_uint_t naddrs;
ngx_uint_t weight;
ngx_uint_t max_fails;
time_t fail_timeout;
ngx_uint_t max_busy;
unsigned down:1;
unsigned backup:1;
} ngx_tcp_upstream_server_t;
#define NGX_TCP_UPSTREAM_CREATE 0x0001
#define NGX_TCP_UPSTREAM_WEIGHT 0x0002
#define NGX_TCP_UPSTREAM_MAX_FAILS 0x0004
#define NGX_TCP_UPSTREAM_FAIL_TIMEOUT 0x0008
#define NGX_TCP_UPSTREAM_DOWN 0x0010
#define NGX_TCP_UPSTREAM_BACKUP 0x0020
#define NGX_TCP_UPSTREAM_SRUN_ID 0x0040
#define NGX_TCP_UPSTREAM_MAX_BUSY 0x0080
struct ngx_tcp_upstream_srv_conf_s {
ngx_tcp_upstream_peer_t peer;
void **srv_conf;
ngx_array_t *servers; /* ngx_tcp_upstream_server_t */
ngx_uint_t flags;
ngx_str_t host;
u_char *file_name;
ngx_uint_t line;
in_port_t port;
in_port_t default_port;
ngx_uint_t fall_count;
ngx_uint_t rise_count;
ngx_msec_t check_interval;
ngx_msec_t check_timeout;
check_conf_t *check_type_conf;
ngx_str_t send;
union {
ngx_uint_t return_code;
ngx_uint_t status_alive;
} code;
};
typedef struct {
ngx_tcp_upstream_srv_conf_t *upstream;
ngx_msec_t connect_timeout;
ngx_msec_t send_timeout;
ngx_msec_t read_timeout;
ngx_msec_t timeout;
} ngx_tcp_upstream_conf_t;
struct ngx_tcp_upstream_resolved_s {
ngx_str_t host;
in_port_t port;
ngx_uint_t no_port; /* unsigned no_port:1 */
ngx_uint_t naddrs;
in_addr_t *addrs;
struct sockaddr *sockaddr;
socklen_t socklen;
ngx_resolver_ctx_t *ctx;
};
typedef void (*ngx_tcp_upstream_handler_pt)(ngx_tcp_session_t *s,
ngx_tcp_upstream_t *u);
struct ngx_tcp_upstream_s {
ngx_tcp_upstream_handler_pt read_event_handler;
ngx_tcp_upstream_handler_pt write_event_handler;
ngx_peer_connection_t peer;
ngx_tcp_upstream_conf_t *conf;
ngx_tcp_upstream_resolved_t *resolved;
ngx_tcp_upstream_state_t *state;
ngx_tcp_cleanup_pt *cleanup;
};
typedef struct {
ngx_uint_t status;
ngx_uint_t mask;
} ngx_tcp_upstream_next_t;
ngx_int_t ngx_tcp_upstream_create(ngx_tcp_session_t *s);
void ngx_tcp_upstream_init(ngx_tcp_session_t *s);
ngx_tcp_upstream_srv_conf_t *ngx_tcp_upstream_add(ngx_conf_t *cf,
ngx_url_t *u, ngx_uint_t flags);
ngx_int_t ngx_tcp_upstream_check_broken_connection(ngx_tcp_session_t *s);
void ngx_tcp_upstream_next(ngx_tcp_session_t *s, ngx_tcp_upstream_t *u, ngx_uint_t ft_type);
#define ngx_tcp_conf_upstream_srv_conf(uscf, module) \
uscf->srv_conf[module.ctx_index]
extern ngx_module_t ngx_tcp_upstream_module;
#endif /* _NGX_TCP_UPSTREAM_H_INCLUDED_ */