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206 lines
10 KiB
206 lines
10 KiB
5 months ago
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/*
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* include/haproxy/stream-t.h
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* This file defines everything related to streams.
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*
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* Copyright (C) 2000-2020 Willy Tarreau - w@1wt.eu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _HAPROXY_STREAM_T_H
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#define _HAPROXY_STREAM_T_H
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#include <sys/time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <haproxy/api-t.h>
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#include <haproxy/channel-t.h>
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#include <haproxy/dynbuf-t.h>
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#include <haproxy/filters-t.h>
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#include <haproxy/hlua-t.h>
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#include <haproxy/http_ana-t.h>
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#include <haproxy/obj_type-t.h>
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#include <haproxy/proxy-t.h>
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#include <haproxy/queue-t.h>
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#include <haproxy/server-t.h>
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#include <haproxy/session-t.h>
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#include <haproxy/stick_table-t.h>
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#include <haproxy/stream_interface-t.h>
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#include <haproxy/task-t.h>
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#include <haproxy/vars-t.h>
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/* Various Stream Flags, bits values 0x01 to 0x100 (shift 0) */
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#define SF_DIRECT 0x00000001 /* connection made on the server matching the client cookie */
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#define SF_ASSIGNED 0x00000002 /* no need to assign a server to this stream */
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#define SF_ADDR_SET 0x00000004 /* this stream's server address has been set */
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#define SF_BE_ASSIGNED 0x00000008 /* a backend was assigned. Conns are accounted. */
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#define SF_FORCE_PRST 0x00000010 /* force persistence here, even if server is down */
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#define SF_MONITOR 0x00000020 /* this stream comes from a monitoring system */
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#define SF_CURR_SESS 0x00000040 /* a connection is currently being counted on the server */
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/* unused: 0x00000080 */
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#define SF_REDISP 0x00000100 /* set if this stream was redispatched from one server to another */
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#define SF_IGNORE 0x00000200 /* The stream lead to a mux upgrade, and should be ignored */
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#define SF_REDIRECTABLE 0x00000400 /* set if this stream is redirectable (GET or HEAD) */
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#define SF_HTX 0x00000800 /* set if this stream is an htx stream */
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/* stream termination conditions, bits values 0x1000 to 0x7000 (0-9 shift 12) */
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#define SF_ERR_NONE 0x00000000 /* normal end of request */
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#define SF_ERR_LOCAL 0x00001000 /* the proxy locally processed this request => not an error */
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#define SF_ERR_CLITO 0x00002000 /* client time-out */
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#define SF_ERR_CLICL 0x00003000 /* client closed (read/write error) */
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#define SF_ERR_SRVTO 0x00004000 /* server time-out, connect time-out */
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#define SF_ERR_SRVCL 0x00005000 /* server closed (connect/read/write error) */
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#define SF_ERR_PRXCOND 0x00006000 /* the proxy decided to close (deny...) */
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#define SF_ERR_RESOURCE 0x00007000 /* the proxy encountered a lack of a local resources (fd, mem, ...) */
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#define SF_ERR_INTERNAL 0x00008000 /* the proxy encountered an internal error */
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#define SF_ERR_DOWN 0x00009000 /* the proxy killed a stream because the backend became unavailable */
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#define SF_ERR_KILLED 0x0000a000 /* the proxy killed a stream because it was asked to do so */
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#define SF_ERR_UP 0x0000b000 /* the proxy killed a stream because a preferred backend became available */
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#define SF_ERR_CHK_PORT 0x0000c000 /* no port could be found for a health check. TODO: check SF_ERR_SHIFT */
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#define SF_ERR_MASK 0x0000f000 /* mask to get only stream error flags */
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#define SF_ERR_SHIFT 12 /* bit shift */
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/* stream state at termination, bits values 0x10000 to 0x70000 (0-7 shift 16) */
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#define SF_FINST_R 0x00010000 /* stream ended during client request */
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#define SF_FINST_C 0x00020000 /* stream ended during server connect */
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#define SF_FINST_H 0x00030000 /* stream ended during server headers */
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#define SF_FINST_D 0x00040000 /* stream ended during data phase */
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#define SF_FINST_L 0x00050000 /* stream ended while pushing last data to client */
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#define SF_FINST_Q 0x00060000 /* stream ended while waiting in queue for a server slot */
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#define SF_FINST_T 0x00070000 /* stream ended tarpitted */
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#define SF_FINST_MASK 0x00070000 /* mask to get only final stream state flags */
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#define SF_FINST_SHIFT 16 /* bit shift */
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#define SF_IGNORE_PRST 0x00080000 /* ignore persistence */
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#define SF_SRV_REUSED 0x00100000 /* the server-side connection was reused */
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/* flags for the proxy of the master CLI */
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/* 0x1.. to 0x3 are reserved for ACCESS_LVL_MASK */
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#define PCLI_F_PROMPT 0x4
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#define PCLI_F_PAYLOAD 0x8
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/* some external definitions */
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struct strm_logs {
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int logwait; /* log fields waiting to be collected : LW_* */
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int level; /* log level to force + 1 if > 0, -1 = no log */
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struct timeval accept_date; /* date of the stream's accept() in user date */
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struct timeval tv_accept; /* date of the stream's accept() in internal date (monotonic) */
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long t_handshake; /* handshake duration, -1 if never occurs */
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long t_idle; /* idle duration, -1 if never occurs */
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struct timeval tv_request; /* date the request arrives, {0,0} if never occurs */
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long t_queue; /* delay before the stream gets out of the connect queue, -1 if never occurs */
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long t_connect; /* delay before the connect() to the server succeeds, -1 if never occurs */
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long t_data; /* delay before the first data byte from the server ... */
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unsigned long t_close; /* total stream duration */
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unsigned long srv_queue_pos; /* number of streams de-queued while waiting for a connection slot on this server */
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unsigned long prx_queue_pos; /* number of streams de-qeuued while waiting for a connection slot on this instance */
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long long bytes_in; /* number of bytes transferred from the client to the server */
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long long bytes_out; /* number of bytes transferred from the server to the client */
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};
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struct stream {
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int flags; /* some flags describing the stream */
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unsigned int uniq_id; /* unique ID used for the traces */
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enum obj_type *target; /* target to use for this stream */
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struct channel req; /* request channel */
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struct channel res; /* response channel */
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struct proxy *be; /* the proxy this stream depends on for the server side */
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struct session *sess; /* the session this stream is attached to */
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struct server *srv_conn; /* stream already has a slot on a server and is not in queue */
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struct pendconn *pend_pos; /* if not NULL, points to the pending position in the pending queue */
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struct http_txn *txn; /* current HTTP transaction being processed. Should become a list. */
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struct task *task; /* the task associated with this stream */
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unsigned short pending_events; /* the pending events not yet processed by the stream.
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* This is a bit field of TASK_WOKEN_* */
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int16_t priority_class; /* priority class of the stream for the pending queue */
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int32_t priority_offset; /* priority offset of the stream for the pending queue */
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struct list list; /* position in global streams list */
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struct list by_srv; /* position in server stream list */
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struct list back_refs; /* list of users tracking this stream */
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struct buffer_wait buffer_wait; /* position in the list of objects waiting for a buffer */
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struct freq_ctr call_rate; /* stream task call rate */
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short store_count;
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enum obj_type obj_type; /* object type == OBJ_TYPE_STREAM */
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/* 1 unused bytes here */
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struct {
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struct stksess *ts;
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struct stktable *table;
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} store[8]; /* tracked stickiness values to store */
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struct sockaddr_storage *target_addr; /* the address to join if not null */
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struct stkctr stkctr[MAX_SESS_STKCTR]; /* content-aware stick counters */
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struct strm_flt strm_flt; /* current state of filters active on this stream */
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char **req_cap; /* array of captures from the request (may be NULL) */
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char **res_cap; /* array of captures from the response (may be NULL) */
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struct vars vars_txn; /* list of variables for the txn scope. */
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struct vars vars_reqres; /* list of variables for the request and resp scope. */
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struct stream_interface si[2]; /* client and server stream interfaces */
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struct strm_logs logs; /* logs for this stream */
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void (*do_log)(struct stream *s); /* the function to call in order to log (or NULL) */
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void (*srv_error)(struct stream *s, /* the function to call upon unrecoverable server errors (or NULL) */
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struct stream_interface *si);
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int pcli_next_pid; /* next target PID to use for the CLI proxy */
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int pcli_flags; /* flags for CLI proxy */
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struct ist unique_id; /* custom unique ID */
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/* These two pointers are used to resume the execution of the rule lists. */
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struct list *current_rule_list; /* this is used to store the current executed rule list. */
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void *current_rule; /* this is used to store the current rule to be resumed. */
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int rules_exp; /* expiration date for current rules execution */
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struct hlua *hlua; /* lua runtime context */
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/* Context */
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struct {
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struct dns_requester *dns_requester; /* owner of the resolution */
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char *hostname_dn; /* hostname being resolve, in domain name format */
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int hostname_dn_len; /* size of hostname_dn */
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/* 4 unused bytes here */
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struct act_rule *parent; /* rule which requested this resolution */
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} dns_ctx; /* context information for DNS resolution */
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int tunnel_timeout;
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};
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#endif /* _HAPROXY_STREAM_T_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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