blob: e9d640016c386194fb419bd40e279a4cc8d155cc [file] [log] [blame]
/*
* Stream management functions.
*
* Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <common/cfgparse.h>
#include <common/config.h>
#include <common/buffer.h>
#include <common/debug.h>
#include <common/memory.h>
#include <types/applet.h>
#include <types/capture.h>
#include <types/cli.h>
#include <types/filters.h>
#include <types/global.h>
#include <types/stats.h>
#include <proto/acl.h>
#include <proto/action.h>
#include <proto/arg.h>
#include <proto/backend.h>
#include <proto/channel.h>
#include <proto/checks.h>
#include <proto/cli.h>
#include <proto/connection.h>
#include <proto/stats.h>
#include <proto/fd.h>
#include <proto/filters.h>
#include <proto/freq_ctr.h>
#include <proto/frontend.h>
#include <proto/hdr_idx.h>
#include <proto/hlua.h>
#include <proto/listener.h>
#include <proto/log.h>
#include <proto/raw_sock.h>
#include <proto/session.h>
#include <proto/stream.h>
#include <proto/pipe.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/queue.h>
#include <proto/server.h>
#include <proto/sample.h>
#include <proto/stick_table.h>
#include <proto/stream_interface.h>
#include <proto/task.h>
#include <proto/tcp_rules.h>
#include <proto/vars.h>
struct pool_head *pool2_stream;
struct list streams;
/* List of all use-service keywords. */
static struct list service_keywords = LIST_HEAD_INIT(service_keywords);
/* Create a new stream for connection <conn>. Return < 0 on error. This is only
* valid right after the handshake, before the connection's data layer is
* initialized, because it relies on the session to be in conn->owner.
*/
int stream_create_from_conn(struct connection *conn)
{
struct stream *strm;
strm = stream_new(conn->owner, &conn->obj_type);
if (strm == NULL)
return -1;
task_wakeup(strm->task, TASK_WOKEN_INIT);
return 0;
}
/* This function is called from the session handler which detects the end of
* handshake, in order to complete initialization of a valid stream. It must be
* called with a completley initialized session. It returns the pointer to
* the newly created stream, or NULL in case of fatal error. The client-facing
* end point is assigned to <origin>, which must be valid. The stream's task
* is configured with a nice value inherited from the listener's nice if any.
* The task's context is set to the new stream, and its function is set to
* process_stream(). Target and analysers are null.
*/
struct stream *stream_new(struct session *sess, enum obj_type *origin)
{
struct stream *s;
struct task *t;
struct connection *conn = objt_conn(origin);
struct appctx *appctx = objt_appctx(origin);
if (unlikely((s = pool_alloc2(pool2_stream)) == NULL))
goto out_fail_alloc;
/* minimum stream initialization required for an embryonic stream is
* fairly low. We need very little to execute L4 ACLs, then we need a
* task to make the client-side connection live on its own.
* - flags
* - stick-entry tracking
*/
s->flags = 0;
s->logs.logwait = sess->fe->to_log;
s->logs.level = 0;
s->logs.accept_date = sess->accept_date; /* user-visible date for logging */
s->logs.tv_accept = sess->tv_accept; /* corrected date for internal use */
/* This function is called just after the handshake, so the handshake duration is
* between the accept time and now.
*/
s->logs.t_handshake = tv_ms_elapsed(&sess->tv_accept, &now);
s->logs.t_idle = -1;
tv_zero(&s->logs.tv_request);
s->logs.t_queue = -1;
s->logs.t_connect = -1;
s->logs.t_data = -1;
s->logs.t_close = 0;
s->logs.bytes_in = s->logs.bytes_out = 0;
s->logs.prx_queue_size = 0; /* we get the number of pending conns before us */
s->logs.srv_queue_size = 0; /* we will get this number soon */
/* default logging function */
s->do_log = strm_log;
/* default error reporting function, may be changed by analysers */
s->srv_error = default_srv_error;
/* Initialise the current rule list pointer to NULL. We are sure that
* any rulelist match the NULL pointer.
*/
s->current_rule_list = NULL;
s->current_rule = NULL;
/* Copy SC counters for the stream. We don't touch refcounts because
* any reference we have is inherited from the session. Since the stream
* doesn't exist without the session, the session's existence guarantees
* we don't lose the entry. During the store operation, the stream won't
* touch these ones.
*/
memcpy(s->stkctr, sess->stkctr, sizeof(s->stkctr));
s->sess = sess;
s->si[0].flags = SI_FL_NONE;
s->si[1].flags = SI_FL_ISBACK;
s->uniq_id = global.req_count++;
/* OK, we're keeping the stream, so let's properly initialize the stream */
LIST_ADDQ(&streams, &s->list);
LIST_ADDQ(&sess->streams, &s->by_sess);
LIST_INIT(&s->back_refs);
LIST_INIT(&s->buffer_wait.list);
s->buffer_wait.target = s;
s->buffer_wait.wakeup_cb = (int (*)(void *))stream_res_wakeup;
s->flags |= SF_INITIALIZED;
s->unique_id = NULL;
if ((t = task_new()) == NULL)
goto out_fail_alloc;
s->task = t;
s->pending_events = 0;
t->process = process_stream;
t->context = s;
t->expire = TICK_ETERNITY;
if (sess->listener)
t->nice = sess->listener->nice;
/* Note: initially, the stream's backend points to the frontend.
* This changes later when switching rules are executed or
* when the default backend is assigned.
*/
s->be = sess->fe;
s->req.buf = s->res.buf = NULL;
s->req_cap = NULL;
s->res_cap = NULL;
/* Initialise all the variables contexts even if not used.
* This permits to prune these contexts without errors.
*/
vars_init(&s->vars_txn, SCOPE_TXN);
vars_init(&s->vars_reqres, SCOPE_REQ);
/* this part should be common with other protocols */
si_reset(&s->si[0]);
si_set_state(&s->si[0], SI_ST_EST);
s->si[0].hcto = sess->fe->timeout.clientfin;
/* attach the incoming connection to the stream interface now. */
if (conn)
si_attach_conn(&s->si[0], conn);
else if (appctx)
si_attach_appctx(&s->si[0], appctx);
if (likely(sess->fe->options2 & PR_O2_INDEPSTR))
s->si[0].flags |= SI_FL_INDEP_STR;
/* pre-initialize the other side's stream interface to an INIT state. The
* callbacks will be initialized before attempting to connect.
*/
si_reset(&s->si[1]);
s->si[1].hcto = TICK_ETERNITY;
if (likely(sess->fe->options2 & PR_O2_INDEPSTR))
s->si[1].flags |= SI_FL_INDEP_STR;
stream_init_srv_conn(s);
s->target = sess->listener ? sess->listener->default_target : NULL;
s->pend_pos = NULL;
/* init store persistence */
s->store_count = 0;
channel_init(&s->req);
s->req.flags |= CF_READ_ATTACHED; /* the producer is already connected */
s->req.analysers = sess->listener ? sess->listener->analysers : 0;
channel_auto_connect(&s->req); /* don't wait to establish connection */
channel_auto_close(&s->req); /* let the producer forward close requests */
s->req.rto = sess->fe->timeout.client;
s->req.wto = TICK_ETERNITY;
s->req.rex = TICK_ETERNITY;
s->req.wex = TICK_ETERNITY;
s->req.analyse_exp = TICK_ETERNITY;
channel_init(&s->res);
s->res.flags |= CF_ISRESP;
s->res.analysers = 0;
if (sess->fe->options2 & PR_O2_NODELAY) {
s->req.flags |= CF_NEVER_WAIT;
s->res.flags |= CF_NEVER_WAIT;
}
s->res.wto = sess->fe->timeout.client;
s->res.rto = TICK_ETERNITY;
s->res.rex = TICK_ETERNITY;
s->res.wex = TICK_ETERNITY;
s->res.analyse_exp = TICK_ETERNITY;
s->txn = NULL;
s->hlua = NULL;
if (flt_stream_init(s) < 0 || flt_stream_start(s) < 0)
goto out_fail_accept;
/* finish initialization of the accepted file descriptor */
if (conn)
conn_data_want_recv(conn);
else if (appctx)
si_applet_want_get(&s->si[0]);
if (sess->fe->accept && sess->fe->accept(s) < 0)
goto out_fail_accept;
/* it is important not to call the wakeup function directly but to
* pass through task_wakeup(), because this one knows how to apply
* priorities to tasks. Using multi thread we must be sure that
* stream is fully initialized before calling task_wakeup. So
* the caller must handle the task_wakeup
*/
return s;
/* Error unrolling */
out_fail_accept:
flt_stream_release(s, 0);
task_free(t);
out_fail_alloc:
LIST_DEL(&s->by_sess);
LIST_DEL(&s->list);
pool_free2(pool2_stream, s);
return NULL;
}
/*
* frees the context associated to a stream. It must have been removed first.
*/
static void stream_free(struct stream *s)
{
struct session *sess = strm_sess(s);
struct proxy *fe = sess->fe;
struct bref *bref, *back;
struct connection *cli_conn = objt_conn(s->si[0].end);
int i;
if (s->pend_pos)
pendconn_free(s->pend_pos);
if (objt_server(s->target)) { /* there may be requests left pending in queue */
if (s->flags & SF_CURR_SESS) {
s->flags &= ~SF_CURR_SESS;
objt_server(s->target)->cur_sess--;
}
if (may_dequeue_tasks(objt_server(s->target), s->be))
process_srv_queue(objt_server(s->target));
}
if (unlikely(s->srv_conn)) {
/* the stream still has a reserved slot on a server, but
* it should normally be only the same as the one above,
* so this should not happen in fact.
*/
sess_change_server(s, NULL);
}
if (s->req.pipe)
put_pipe(s->req.pipe);
if (s->res.pipe)
put_pipe(s->res.pipe);
/* We may still be present in the buffer wait queue */
if (!LIST_ISEMPTY(&s->buffer_wait.list)) {
LIST_DEL(&s->buffer_wait.list);
LIST_INIT(&s->buffer_wait.list);
}
if (s->req.buf->size || s->res.buf->size) {
b_drop(&s->req.buf);
b_drop(&s->res.buf);
offer_buffers(NULL, tasks_run_queue + applets_active_queue);
}
hlua_ctx_destroy(s->hlua);
s->hlua = NULL;
if (s->txn)
http_end_txn(s);
/* ensure the client-side transport layer is destroyed */
if (cli_conn)
conn_force_close(cli_conn);
for (i = 0; i < s->store_count; i++) {
if (!s->store[i].ts)
continue;
stksess_free(s->store[i].table, s->store[i].ts);
s->store[i].ts = NULL;
}
if (s->txn) {
pool_free2(pool2_hdr_idx, s->txn->hdr_idx.v);
pool_free2(pool2_http_txn, s->txn);
s->txn = NULL;
}
flt_stream_stop(s);
flt_stream_release(s, 0);
if (fe) {
pool_free2(fe->rsp_cap_pool, s->res_cap);
pool_free2(fe->req_cap_pool, s->req_cap);
}
/* Cleanup all variable contexts. */
vars_prune(&s->vars_txn, s->sess, s);
vars_prune(&s->vars_reqres, s->sess, s);
stream_store_counters(s);
list_for_each_entry_safe(bref, back, &s->back_refs, users) {
/* we have to unlink all watchers. We must not relink them if
* this stream was the last one in the list.
*/
LIST_DEL(&bref->users);
LIST_INIT(&bref->users);
if (s->list.n != &streams)
LIST_ADDQ(&LIST_ELEM(s->list.n, struct stream *, list)->back_refs, &bref->users);
bref->ref = s->list.n;
}
LIST_DEL(&s->by_sess);
LIST_DEL(&s->list);
si_release_endpoint(&s->si[1]);
si_release_endpoint(&s->si[0]);
/* FIXME: for now we have a 1:1 relation between stream and session so
* the stream must free the session.
*/
pool_free2(pool2_stream, s);
session_free(sess);
/* We may want to free the maximum amount of pools if the proxy is stopping */
if (fe && unlikely(fe->state == PR_STSTOPPED)) {
pool_flush2(pool2_buffer);
pool_flush2(pool2_http_txn);
pool_flush2(pool2_hdr_idx);
pool_flush2(pool2_requri);
pool_flush2(pool2_capture);
pool_flush2(pool2_stream);
pool_flush2(pool2_session);
pool_flush2(pool2_connection);
pool_flush2(pool2_pendconn);
pool_flush2(fe->req_cap_pool);
pool_flush2(fe->rsp_cap_pool);
}
}
/* Allocates a work buffer for stream <s>. It is meant to be called inside
* process_stream(). It will only allocate the side needed for the function
* to work fine, which is the response buffer so that an error message may be
* built and returned. Response buffers may be allocated from the reserve, this
* is critical to ensure that a response may always flow and will never block a
* server from releasing a connection. Returns 0 in case of failure, non-zero
* otherwise.
*/
static int stream_alloc_work_buffer(struct stream *s)
{
if (!LIST_ISEMPTY(&s->buffer_wait.list)) {
LIST_DEL(&s->buffer_wait.list);
LIST_INIT(&s->buffer_wait.list);
}
if (b_alloc_margin(&s->res.buf, 0))
return 1;
LIST_ADDQ(&buffer_wq, &s->buffer_wait.list);
return 0;
}
/* releases unused buffers after processing. Typically used at the end of the
* update() functions. It will try to wake up as many tasks/applets as the
* number of buffers that it releases. In practice, most often streams are
* blocked on a single buffer, so it makes sense to try to wake two up when two
* buffers are released at once.
*/
void stream_release_buffers(struct stream *s)
{
int offer = 0;
if (s->req.buf->size && buffer_empty(s->req.buf)) {
offer = 1;
b_free(&s->req.buf);
}
if (s->res.buf->size && buffer_empty(s->res.buf)) {
offer = 1;
b_free(&s->res.buf);
}
/* if we're certain to have at least 1 buffer available, and there is
* someone waiting, we can wake up a waiter and offer them.
*/
if (offer)
offer_buffers(s, tasks_run_queue + applets_active_queue);
}
/* perform minimal intializations, report 0 in case of error, 1 if OK. */
int init_stream()
{
LIST_INIT(&streams);
pool2_stream = create_pool("stream", sizeof(struct stream), MEM_F_SHARED);
return pool2_stream != NULL;
}
void stream_process_counters(struct stream *s)
{
struct session *sess = s->sess;
unsigned long long bytes;
void *ptr1,*ptr2;
int i;
bytes = s->req.total - s->logs.bytes_in;
s->logs.bytes_in = s->req.total;
if (bytes) {
sess->fe->fe_counters.bytes_in += bytes;
s->be->be_counters.bytes_in += bytes;
if (objt_server(s->target))
objt_server(s->target)->counters.bytes_in += bytes;
if (sess->listener && sess->listener->counters)
sess->listener->counters->bytes_in += bytes;
for (i = 0; i < MAX_SESS_STKCTR; i++) {
struct stkctr *stkctr = &s->stkctr[i];
if (!stkctr_entry(stkctr)) {
stkctr = &sess->stkctr[i];
if (!stkctr_entry(stkctr))
continue;
}
ptr1 = stktable_data_ptr(stkctr->table, stkctr_entry(stkctr), STKTABLE_DT_BYTES_IN_CNT);
if (ptr1)
stktable_data_cast(ptr1, bytes_in_cnt) += bytes;
ptr2 = stktable_data_ptr(stkctr->table, stkctr_entry(stkctr), STKTABLE_DT_BYTES_IN_RATE);
if (ptr2)
update_freq_ctr_period(&stktable_data_cast(ptr2, bytes_in_rate),
stkctr->table->data_arg[STKTABLE_DT_BYTES_IN_RATE].u, bytes);
/* If data was modified, we need to touch to re-schedule sync */
if (ptr1 || ptr2)
stktable_touch(stkctr->table, stkctr_entry(stkctr), 1);
}
}
bytes = s->res.total - s->logs.bytes_out;
s->logs.bytes_out = s->res.total;
if (bytes) {
sess->fe->fe_counters.bytes_out += bytes;
s->be->be_counters.bytes_out += bytes;
if (objt_server(s->target))
objt_server(s->target)->counters.bytes_out += bytes;
if (sess->listener && sess->listener->counters)
sess->listener->counters->bytes_out += bytes;
for (i = 0; i < MAX_SESS_STKCTR; i++) {
struct stkctr *stkctr = &s->stkctr[i];
if (!stkctr_entry(stkctr)) {
stkctr = &sess->stkctr[i];
if (!stkctr_entry(stkctr))
continue;
}
ptr1 = stktable_data_ptr(stkctr->table, stkctr_entry(stkctr), STKTABLE_DT_BYTES_OUT_CNT);
if (ptr1)
stktable_data_cast(ptr1, bytes_out_cnt) += bytes;
ptr2 = stktable_data_ptr(stkctr->table, stkctr_entry(stkctr), STKTABLE_DT_BYTES_OUT_RATE);
if (ptr2)
update_freq_ctr_period(&stktable_data_cast(ptr2, bytes_out_rate),
stkctr->table->data_arg[STKTABLE_DT_BYTES_OUT_RATE].u, bytes);
/* If data was modified, we need to touch to re-schedule sync */
if (ptr1 || ptr2)
stktable_touch(stkctr->table, stkctr_entry(stkctr), 1);
}
}
}
/* This function is called with (si->state == SI_ST_CON) meaning that a
* connection was attempted and that the file descriptor is already allocated.
* We must check for establishment, error and abort. Possible output states
* are SI_ST_EST (established), SI_ST_CER (error), SI_ST_DIS (abort), and
* SI_ST_CON (no change). The function returns 0 if it switches to SI_ST_CER,
* otherwise 1. This only works with connection-based streams.
*/
static int sess_update_st_con_tcp(struct stream *s)
{
struct stream_interface *si = &s->si[1];
struct channel *req = &s->req;
struct channel *rep = &s->res;
struct connection *srv_conn = __objt_conn(si->end);
/* If we got an error, or if nothing happened and the connection timed
* out, we must give up. The CER state handler will take care of retry
* attempts and error reports.
*/
if (unlikely(si->flags & (SI_FL_EXP|SI_FL_ERR))) {
if (unlikely(req->flags & CF_WRITE_PARTIAL)) {
/* Some data were sent past the connection establishment,
* so we need to pretend we're established to log correctly
* and let later states handle the failure.
*/
si->state = SI_ST_EST;
si->err_type = SI_ET_DATA_ERR;
rep->flags |= CF_READ_ERROR | CF_WRITE_ERROR;
return 1;
}
si->exp = TICK_ETERNITY;
si->state = SI_ST_CER;
conn_force_close(srv_conn);
if (si->err_type)
return 0;
if (si->flags & SI_FL_ERR)
si->err_type = SI_ET_CONN_ERR;
else
si->err_type = SI_ET_CONN_TO;
return 0;
}
/* OK, maybe we want to abort */
if (!(req->flags & CF_WRITE_PARTIAL) &&
unlikely((rep->flags & CF_SHUTW) ||
((req->flags & CF_SHUTW_NOW) && /* FIXME: this should not prevent a connection from establishing */
((!(req->flags & CF_WRITE_ACTIVITY) && channel_is_empty(req)) ||
s->be->options & PR_O_ABRT_CLOSE)))) {
/* give up */
si_shutw(si);
si->err_type |= SI_ET_CONN_ABRT;
if (s->srv_error)
s->srv_error(s, si);
return 1;
}
/* we need to wait a bit more if there was no activity either */
if (!(req->flags & CF_WRITE_ACTIVITY))
return 1;
/* OK, this means that a connection succeeded. The caller will be
* responsible for handling the transition from CON to EST.
*/
si->state = SI_ST_EST;
si->err_type = SI_ET_NONE;
return 1;
}
/* This function is called with (si->state == SI_ST_CER) meaning that a
* previous connection attempt has failed and that the file descriptor
* has already been released. Possible causes include asynchronous error
* notification and time out. Possible output states are SI_ST_CLO when
* retries are exhausted, SI_ST_TAR when a delay is wanted before a new
* connection attempt, SI_ST_ASS when it's wise to retry on the same server,
* and SI_ST_REQ when an immediate redispatch is wanted. The buffers are
* marked as in error state. It returns 0.
*/
static int sess_update_st_cer(struct stream *s)
{
struct stream_interface *si = &s->si[1];
struct connection *conn = objt_conn(si->end);
/* we probably have to release last stream from the server */
if (objt_server(s->target)) {
health_adjust(objt_server(s->target), HANA_STATUS_L4_ERR);
if (s->flags & SF_CURR_SESS) {
s->flags &= ~SF_CURR_SESS;
objt_server(s->target)->cur_sess--;
}
if ((si->flags & SI_FL_ERR) &&
conn && conn->err_code == CO_ER_SSL_MISMATCH_SNI) {
/* We tried to connect to a server which is configured
* with "verify required" and which doesn't have the
* "verifyhost" directive. The server presented a wrong
* certificate (a certificate for an unexpected name),
* which implies that we have used SNI in the handshake,
* and that the server doesn't have the associated cert
* and presented a default one.
*
* This is a serious enough issue not to retry. It's
* especially important because this wrong name might
* either be the result of a configuration error, and
* retrying will only hammer the server, or is caused
* by the use of a wrong SNI value, most likely
* provided by the client and we don't want to let the
* client provoke retries.
*/
si->conn_retries = 0;
}
}
/* ensure that we have enough retries left */
si->conn_retries--;
if (si->conn_retries < 0) {
if (!si->err_type) {
si->err_type = SI_ET_CONN_ERR;
}
if (objt_server(s->target))
objt_server(s->target)->counters.failed_conns++;
s->be->be_counters.failed_conns++;
sess_change_server(s, NULL);
if (may_dequeue_tasks(objt_server(s->target), s->be))
process_srv_queue(objt_server(s->target));
/* shutw is enough so stop a connecting socket */
si_shutw(si);
s->req.flags |= CF_WRITE_ERROR;
s->res.flags |= CF_READ_ERROR;
si->state = SI_ST_CLO;
if (s->srv_error)
s->srv_error(s, si);
return 0;
}
/* If the "redispatch" option is set on the backend, we are allowed to
* retry on another server. By default this redispatch occurs on the
* last retry, but if configured we allow redispatches to occur on
* configurable intervals, e.g. on every retry. In order to achieve this,
* we must mark the stream unassigned, and eventually clear the DIRECT
* bit to ignore any persistence cookie. We won't count a retry nor a
* redispatch yet, because this will depend on what server is selected.
* If the connection is not persistent, the balancing algorithm is not
* determinist (round robin) and there is more than one active server,
* we accept to perform an immediate redispatch without waiting since
* we don't care about this particular server.
*/
if (objt_server(s->target) &&
(s->be->options & PR_O_REDISP) && !(s->flags & SF_FORCE_PRST) &&
((__objt_server(s->target)->cur_state < SRV_ST_RUNNING) ||
(((s->be->redispatch_after > 0) &&
((s->be->conn_retries - si->conn_retries) %
s->be->redispatch_after == 0)) ||
((s->be->redispatch_after < 0) &&
((s->be->conn_retries - si->conn_retries) %
(s->be->conn_retries + 1 + s->be->redispatch_after) == 0))) ||
(!(s->flags & SF_DIRECT) && s->be->srv_act > 1 &&
((s->be->lbprm.algo & BE_LB_KIND) == BE_LB_KIND_RR)))) {
sess_change_server(s, NULL);
if (may_dequeue_tasks(objt_server(s->target), s->be))
process_srv_queue(objt_server(s->target));
s->flags &= ~(SF_DIRECT | SF_ASSIGNED | SF_ADDR_SET);
si->state = SI_ST_REQ;
} else {
if (objt_server(s->target))
objt_server(s->target)->counters.retries++;
s->be->be_counters.retries++;
si->state = SI_ST_ASS;
}
if (si->flags & SI_FL_ERR) {
/* The error was an asynchronous connection error, and we will
* likely have to retry connecting to the same server, most
* likely leading to the same result. To avoid this, we wait
* MIN(one second, connect timeout) before retrying.
*/
int delay = 1000;
if (s->be->timeout.connect && s->be->timeout.connect < delay)
delay = s->be->timeout.connect;
if (!si->err_type)
si->err_type = SI_ET_CONN_ERR;
/* only wait when we're retrying on the same server */
if (si->state == SI_ST_ASS ||
(s->be->lbprm.algo & BE_LB_KIND) != BE_LB_KIND_RR ||
(s->be->srv_act <= 1)) {
si->state = SI_ST_TAR;
si->exp = tick_add(now_ms, MS_TO_TICKS(delay));
}
return 0;
}
return 0;
}
/*
* This function handles the transition between the SI_ST_CON state and the
* SI_ST_EST state. It must only be called after switching from SI_ST_CON (or
* SI_ST_INI) to SI_ST_EST, but only when a ->proto is defined.
*/
static void sess_establish(struct stream *s)
{
struct stream_interface *si = &s->si[1];
struct channel *req = &s->req;
struct channel *rep = &s->res;
/* First, centralize the timers information */
s->logs.t_connect = tv_ms_elapsed(&s->logs.tv_accept, &now);
si->exp = TICK_ETERNITY;
if (objt_server(s->target))
health_adjust(objt_server(s->target), HANA_STATUS_L4_OK);
if (s->be->mode == PR_MODE_TCP) { /* let's allow immediate data connection in this case */
/* if the user wants to log as soon as possible, without counting
* bytes from the server, then this is the right moment. */
if (!LIST_ISEMPTY(&strm_fe(s)->logformat) && !(s->logs.logwait & LW_BYTES)) {
s->logs.t_close = s->logs.t_connect; /* to get a valid end date */
s->do_log(s);
}
}
else {
rep->flags |= CF_READ_DONTWAIT; /* a single read is enough to get response headers */
}
if (!(s->flags & SF_TUNNEL)) {
rep->analysers |= strm_fe(s)->fe_rsp_ana | s->be->be_rsp_ana;
/* Be sure to filter response headers if the backend is an HTTP proxy
* and if there are filters attached to the stream. */
if (s->be->mode == PR_MODE_HTTP && HAS_FILTERS(s))
rep->analysers |= AN_RES_FLT_HTTP_HDRS;
}
rep->flags |= CF_READ_ATTACHED; /* producer is now attached */
if (req->flags & CF_WAKE_CONNECT) {
req->flags |= CF_WAKE_ONCE;
req->flags &= ~CF_WAKE_CONNECT;
}
if (objt_conn(si->end)) {
/* real connections have timeouts */
req->wto = s->be->timeout.server;
rep->rto = s->be->timeout.server;
}
req->wex = TICK_ETERNITY;
}
/* Check if the connection request is in such a state that it can be aborted. */
static int check_req_may_abort(struct channel *req, struct stream *s)
{
return ((req->flags & (CF_READ_ERROR)) ||
((req->flags & CF_SHUTW_NOW) && /* empty and client aborted */
(channel_is_empty(req) || s->be->options & PR_O_ABRT_CLOSE)));
}
/* Update back stream interface status for input states SI_ST_ASS, SI_ST_QUE,
* SI_ST_TAR. Other input states are simply ignored.
* Possible output states are SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ, SI_ST_CON
* and SI_ST_EST. Flags must have previously been updated for timeouts and other
* conditions.
*/
static void sess_update_stream_int(struct stream *s)
{
struct server *srv = objt_server(s->target);
struct stream_interface *si = &s->si[1];
struct channel *req = &s->req;
DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d\n",
now_ms, __FUNCTION__,
s,
req, &s->res,
req->rex, s->res.wex,
req->flags, s->res.flags,
req->buf->i, req->buf->o, s->res.buf->i, s->res.buf->o, s->si[0].state, s->si[1].state);
if (si->state == SI_ST_ASS) {
/* Server assigned to connection request, we have to try to connect now */
int conn_err;
/* Before we try to initiate the connection, see if the
* request may be aborted instead.
*/
if (check_req_may_abort(req, s)) {
si->err_type |= SI_ET_CONN_ABRT;
goto abort_connection;
}
conn_err = connect_server(s);
srv = objt_server(s->target);
if (conn_err == SF_ERR_NONE) {
/* state = SI_ST_CON or SI_ST_EST now */
if (srv)
srv_inc_sess_ctr(srv);
if (srv)
srv_set_sess_last(srv);
return;
}
/* We have received a synchronous error. We might have to
* abort, retry immediately or redispatch.
*/
if (conn_err == SF_ERR_INTERNAL) {
if (!si->err_type) {
si->err_type = SI_ET_CONN_OTHER;
}
if (srv)
srv_inc_sess_ctr(srv);
if (srv)
srv_set_sess_last(srv);
if (srv)
srv->counters.failed_conns++;
s->be->be_counters.failed_conns++;
/* release other streams waiting for this server */
sess_change_server(s, NULL);
if (may_dequeue_tasks(srv, s->be))
process_srv_queue(srv);
/* Failed and not retryable. */
si_shutr(si);
si_shutw(si);
req->flags |= CF_WRITE_ERROR;
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
/* no stream was ever accounted for this server */
si->state = SI_ST_CLO;
if (s->srv_error)
s->srv_error(s, si);
return;
}
/* We are facing a retryable error, but we don't want to run a
* turn-around now, as the problem is likely a source port
* allocation problem, so we want to retry now.
*/
si->state = SI_ST_CER;
si->flags &= ~SI_FL_ERR;
sess_update_st_cer(s);
/* now si->state is one of SI_ST_CLO, SI_ST_TAR, SI_ST_ASS, SI_ST_REQ */
return;
}
else if (si->state == SI_ST_QUE) {
/* connection request was queued, check for any update */
if (!s->pend_pos) {
/* The connection is not in the queue anymore. Either
* we have a server connection slot available and we
* go directly to the assigned state, or we need to
* load-balance first and go to the INI state.
*/
si->exp = TICK_ETERNITY;
if (unlikely(!(s->flags & SF_ASSIGNED)))
si->state = SI_ST_REQ;
else {
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
si->state = SI_ST_ASS;
}
return;
}
/* Connection request still in queue... */
if (si->flags & SI_FL_EXP) {
/* ... and timeout expired */
si->exp = TICK_ETERNITY;
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
if (srv)
srv->counters.failed_conns++;
s->be->be_counters.failed_conns++;
si_shutr(si);
si_shutw(si);
req->flags |= CF_WRITE_TIMEOUT;
if (!si->err_type)
si->err_type = SI_ET_QUEUE_TO;
si->state = SI_ST_CLO;
if (s->srv_error)
s->srv_error(s, si);
return;
}
/* Connection remains in queue, check if we have to abort it */
if (check_req_may_abort(req, s)) {
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
si->err_type |= SI_ET_QUEUE_ABRT;
goto abort_connection;
}
/* Nothing changed */
return;
}
else if (si->state == SI_ST_TAR) {
/* Connection request might be aborted */
if (check_req_may_abort(req, s)) {
si->err_type |= SI_ET_CONN_ABRT;
goto abort_connection;
}
if (!(si->flags & SI_FL_EXP))
return; /* still in turn-around */
si->exp = TICK_ETERNITY;
/* we keep trying on the same server as long as the stream is
* marked "assigned".
* FIXME: Should we force a redispatch attempt when the server is down ?
*/
if (s->flags & SF_ASSIGNED)
si->state = SI_ST_ASS;
else
si->state = SI_ST_REQ;
return;
}
return;
abort_connection:
/* give up */
si->exp = TICK_ETERNITY;
si_shutr(si);
si_shutw(si);
si->state = SI_ST_CLO;
if (s->srv_error)
s->srv_error(s, si);
return;
}
/* Set correct stream termination flags in case no analyser has done it. It
* also counts a failed request if the server state has not reached the request
* stage.
*/
static void sess_set_term_flags(struct stream *s)
{
if (!(s->flags & SF_FINST_MASK)) {
if (s->si[1].state < SI_ST_REQ) {
strm_fe(s)->fe_counters.failed_req++;
if (strm_li(s) && strm_li(s)->counters)
strm_li(s)->counters->failed_req++;
s->flags |= SF_FINST_R;
}
else if (s->si[1].state == SI_ST_QUE)
s->flags |= SF_FINST_Q;
else if (s->si[1].state < SI_ST_EST)
s->flags |= SF_FINST_C;
else if (s->si[1].state == SI_ST_EST || s->si[1].prev_state == SI_ST_EST)
s->flags |= SF_FINST_D;
else
s->flags |= SF_FINST_L;
}
}
/* This function initiates a server connection request on a stream interface
* already in SI_ST_REQ state. Upon success, the state goes to SI_ST_ASS for
* a real connection to a server, indicating that a server has been assigned,
* or SI_ST_EST for a successful connection to an applet. It may also return
* SI_ST_QUE, or SI_ST_CLO upon error.
*/
static void sess_prepare_conn_req(struct stream *s)
{
struct stream_interface *si = &s->si[1];
DPRINTF(stderr,"[%u] %s: sess=%p rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d\n",
now_ms, __FUNCTION__,
s,
&s->req, &s->res,
s->req.rex, s->res.wex,
s->req.flags, s->res.flags,
s->req.buf->i, s->req.buf->o, s->res.buf->i, s->res.buf->o, s->si[0].state, s->si[1].state);
if (si->state != SI_ST_REQ)
return;
if (unlikely(obj_type(s->target) == OBJ_TYPE_APPLET)) {
/* the applet directly goes to the EST state */
struct appctx *appctx = objt_appctx(si->end);
if (!appctx || appctx->applet != __objt_applet(s->target))
appctx = stream_int_register_handler(si, objt_applet(s->target));
if (!appctx) {
/* No more memory, let's immediately abort. Force the
* error code to ignore the ERR_LOCAL which is not a
* real error.
*/
s->flags &= ~(SF_ERR_MASK | SF_FINST_MASK);
si_shutr(si);
si_shutw(si);
s->req.flags |= CF_WRITE_ERROR;
si->err_type = SI_ET_CONN_RES;
si->state = SI_ST_CLO;
if (s->srv_error)
s->srv_error(s, si);
return;
}
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
si->state = SI_ST_EST;
si->err_type = SI_ET_NONE;
be_set_sess_last(s->be);
/* let sess_establish() finish the job */
return;
}
/* Try to assign a server */
if (srv_redispatch_connect(s) != 0) {
/* We did not get a server. Either we queued the
* connection request, or we encountered an error.
*/
if (si->state == SI_ST_QUE)
return;
/* we did not get any server, let's check the cause */
si_shutr(si);
si_shutw(si);
s->req.flags |= CF_WRITE_ERROR;
if (!si->err_type)
si->err_type = SI_ET_CONN_OTHER;
si->state = SI_ST_CLO;
if (s->srv_error)
s->srv_error(s, si);
return;
}
/* The server is assigned */
s->logs.t_queue = tv_ms_elapsed(&s->logs.tv_accept, &now);
si->state = SI_ST_ASS;
be_set_sess_last(s->be);
}
/* This function parses the use-service action ruleset. It executes
* the associated ACL and set an applet as a stream or txn final node.
* it returns ACT_RET_ERR if an error occurs, the proxy left in
* consistent state. It returns ACT_RET_STOP in succes case because
* use-service must be a terminal action. Returns ACT_RET_YIELD
* if the initialisation function require more data.
*/
enum act_return process_use_service(struct act_rule *rule, struct proxy *px,
struct session *sess, struct stream *s, int flags)
{
struct appctx *appctx;
/* Initialises the applet if it is required. */
if (flags & ACT_FLAG_FIRST) {
/* Register applet. this function schedules the applet. */
s->target = &rule->applet.obj_type;
if (unlikely(!stream_int_register_handler(&s->si[1], objt_applet(s->target))))
return ACT_RET_ERR;
/* Initialise the context. */
appctx = si_appctx(&s->si[1]);
memset(&appctx->ctx, 0, sizeof(appctx->ctx));
appctx->rule = rule;
/* enable the minimally required analyzers in case of HTTP
* keep-alive to properly handle keep-alive and compression
* on the HTTP response.
*/
if (rule->from == ACT_F_HTTP_REQ) {
s->req.analysers &= AN_REQ_FLT_HTTP_HDRS | AN_REQ_FLT_END;
s->req.analysers |= AN_REQ_HTTP_XFER_BODY;
}
}
else
appctx = si_appctx(&s->si[1]);
/* Stops the applet sheduling, in case of the init function miss
* some data.
*/
si_applet_stop_get(&s->si[1]);
/* Call initialisation. */
if (rule->applet.init)
switch (rule->applet.init(appctx, px, s)) {
case 0: return ACT_RET_ERR;
case 1: break;
default: return ACT_RET_YIELD;
}
/* Now we can schedule the applet. */
si_applet_cant_get(&s->si[1]);
appctx_wakeup(appctx);
if (sess->fe == s->be) /* report it if the request was intercepted by the frontend */
sess->fe->fe_counters.intercepted_req++;
/* The flag SF_ASSIGNED prevent from server assignment. */
s->flags |= SF_ASSIGNED;
return ACT_RET_STOP;
}
/* This stream analyser checks the switching rules and changes the backend
* if appropriate. The default_backend rule is also considered, then the
* target backend's forced persistence rules are also evaluated last if any.
* It returns 1 if the processing can continue on next analysers, or zero if it
* either needs more data or wants to immediately abort the request.
*/
static int process_switching_rules(struct stream *s, struct channel *req, int an_bit)
{
struct persist_rule *prst_rule;
struct session *sess = s->sess;
struct proxy *fe = sess->fe;
req->analysers &= ~an_bit;
req->analyse_exp = TICK_ETERNITY;
DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
now_ms, __FUNCTION__,
s,
req,
req->rex, req->wex,
req->flags,
req->buf->i,
req->analysers);
/* now check whether we have some switching rules for this request */
if (!(s->flags & SF_BE_ASSIGNED)) {
struct switching_rule *rule;
list_for_each_entry(rule, &fe->switching_rules, list) {
int ret = 1;
if (rule->cond) {
ret = acl_exec_cond(rule->cond, fe, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (rule->cond->pol == ACL_COND_UNLESS)
ret = !ret;
}
if (ret) {
/* If the backend name is dynamic, try to resolve the name.
* If we can't resolve the name, or if any error occurs, break
* the loop and fallback to the default backend.
*/
struct proxy *backend;
if (rule->dynamic) {
struct chunk *tmp = get_trash_chunk();
if (!build_logline(s, tmp->str, tmp->size, &rule->be.expr))
break;
backend = proxy_be_by_name(tmp->str);
if (!backend)
break;
}
else
backend = rule->be.backend;
if (!stream_set_backend(s, backend))
goto sw_failed;
break;
}
}
/* To ensure correct connection accounting on the backend, we
* have to assign one if it was not set (eg: a listen). This
* measure also takes care of correctly setting the default
* backend if any.
*/
if (!(s->flags & SF_BE_ASSIGNED))
if (!stream_set_backend(s, fe->defbe.be ? fe->defbe.be : s->be))
goto sw_failed;
}
/* we don't want to run the TCP or HTTP filters again if the backend has not changed */
if (fe == s->be) {
s->req.analysers &= ~AN_REQ_INSPECT_BE;
s->req.analysers &= ~AN_REQ_HTTP_PROCESS_BE;
s->req.analysers &= ~AN_REQ_FLT_START_BE;
}
/* as soon as we know the backend, we must check if we have a matching forced or ignored
* persistence rule, and report that in the stream.
*/
list_for_each_entry(prst_rule, &s->be->persist_rules, list) {
int ret = 1;
if (prst_rule->cond) {
ret = acl_exec_cond(prst_rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (prst_rule->cond->pol == ACL_COND_UNLESS)
ret = !ret;
}
if (ret) {
/* no rule, or the rule matches */
if (prst_rule->type == PERSIST_TYPE_FORCE) {
s->flags |= SF_FORCE_PRST;
} else {
s->flags |= SF_IGNORE_PRST;
}
break;
}
}
return 1;
sw_failed:
/* immediately abort this request in case of allocation failure */
channel_abort(&s->req);
channel_abort(&s->res);
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_RESOURCE;
if (!(s->flags & SF_FINST_MASK))
s->flags |= SF_FINST_R;
if (s->txn)
s->txn->status = 500;
s->req.analysers &= AN_REQ_FLT_END;
s->req.analyse_exp = TICK_ETERNITY;
return 0;
}
/* This stream analyser works on a request. It applies all use-server rules on
* it then returns 1. The data must already be present in the buffer otherwise
* they won't match. It always returns 1.
*/
static int process_server_rules(struct stream *s, struct channel *req, int an_bit)
{
struct proxy *px = s->be;
struct session *sess = s->sess;
struct server_rule *rule;
DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bl=%d analysers=%02x\n",
now_ms, __FUNCTION__,
s,
req,
req->rex, req->wex,
req->flags,
req->buf->i + req->buf->o,
req->analysers);
if (!(s->flags & SF_ASSIGNED)) {
list_for_each_entry(rule, &px->server_rules, list) {
int ret;
ret = acl_exec_cond(rule->cond, s->be, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (rule->cond->pol == ACL_COND_UNLESS)
ret = !ret;
if (ret) {
struct server *srv = rule->srv.ptr;
if ((srv->cur_state != SRV_ST_STOPPED) ||
(px->options & PR_O_PERSIST) ||
(s->flags & SF_FORCE_PRST)) {
s->flags |= SF_DIRECT | SF_ASSIGNED;
s->target = &srv->obj_type;
break;
}
/* if the server is not UP, let's go on with next rules
* just in case another one is suited.
*/
}
}
}
req->analysers &= ~an_bit;
req->analyse_exp = TICK_ETERNITY;
return 1;
}
/* This stream analyser works on a request. It applies all sticking rules on
* it then returns 1. The data must already be present in the buffer otherwise
* they won't match. It always returns 1.
*/
static int process_sticking_rules(struct stream *s, struct channel *req, int an_bit)
{
struct proxy *px = s->be;
struct session *sess = s->sess;
struct sticking_rule *rule;
DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
now_ms, __FUNCTION__,
s,
req,
req->rex, req->wex,
req->flags,
req->buf->i,
req->analysers);
list_for_each_entry(rule, &px->sticking_rules, list) {
int ret = 1 ;
int i;
/* Only the first stick store-request of each table is applied
* and other ones are ignored. The purpose is to allow complex
* configurations which look for multiple entries by decreasing
* order of precision and to stop at the first which matches.
* An example could be a store of the IP address from an HTTP
* header first, then from the source if not found.
*/
for (i = 0; i < s->store_count; i++) {
if (rule->table.t == s->store[i].table)
break;
}
if (i != s->store_count)
continue;
if (rule->cond) {
ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (rule->cond->pol == ACL_COND_UNLESS)
ret = !ret;
}
if (ret) {
struct stktable_key *key;
key = stktable_fetch_key(rule->table.t, px, sess, s, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->expr, NULL);
if (!key)
continue;
if (rule->flags & STK_IS_MATCH) {
struct stksess *ts;
if ((ts = stktable_lookup_key(rule->table.t, key)) != NULL) {
if (!(s->flags & SF_ASSIGNED)) {
struct eb32_node *node;
void *ptr;
/* srv found in table */
ptr = stktable_data_ptr(rule->table.t, ts, STKTABLE_DT_SERVER_ID);
node = eb32_lookup(&px->conf.used_server_id, stktable_data_cast(ptr, server_id));
if (node) {
struct server *srv;
srv = container_of(node, struct server, conf.id);
if ((srv->cur_state != SRV_ST_STOPPED) ||
(px->options & PR_O_PERSIST) ||
(s->flags & SF_FORCE_PRST)) {
s->flags |= SF_DIRECT | SF_ASSIGNED;
s->target = &srv->obj_type;
}
}
}
stktable_touch(rule->table.t, ts, 1);
}
}
if (rule->flags & STK_IS_STORE) {
if (s->store_count < (sizeof(s->store) / sizeof(s->store[0]))) {
struct stksess *ts;
ts = stksess_new(rule->table.t, key);
if (ts) {
s->store[s->store_count].table = rule->table.t;
s->store[s->store_count++].ts = ts;
}
}
}
}
}
req->analysers &= ~an_bit;
req->analyse_exp = TICK_ETERNITY;
return 1;
}
/* This stream analyser works on a response. It applies all store rules on it
* then returns 1. The data must already be present in the buffer otherwise
* they won't match. It always returns 1.
*/
static int process_store_rules(struct stream *s, struct channel *rep, int an_bit)
{
struct proxy *px = s->be;
struct session *sess = s->sess;
struct sticking_rule *rule;
int i;
int nbreq = s->store_count;
DPRINTF(stderr,"[%u] %s: stream=%p b=%p, exp(r,w)=%u,%u bf=%08x bh=%d analysers=%02x\n",
now_ms, __FUNCTION__,
s,
rep,
rep->rex, rep->wex,
rep->flags,
rep->buf->i,
rep->analysers);
list_for_each_entry(rule, &px->storersp_rules, list) {
int ret = 1 ;
/* Only the first stick store-response of each table is applied
* and other ones are ignored. The purpose is to allow complex
* configurations which look for multiple entries by decreasing
* order of precision and to stop at the first which matches.
* An example could be a store of a set-cookie value, with a
* fallback to a parameter found in a 302 redirect.
*
* The store-response rules are not allowed to override the
* store-request rules for the same table, but they may coexist.
* Thus we can have up to one store-request entry and one store-
* response entry for the same table at any time.
*/
for (i = nbreq; i < s->store_count; i++) {
if (rule->table.t == s->store[i].table)
break;
}
/* skip existing entries for this table */
if (i < s->store_count)
continue;
if (rule->cond) {
ret = acl_exec_cond(rule->cond, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL);
ret = acl_pass(ret);
if (rule->cond->pol == ACL_COND_UNLESS)
ret = !ret;
}
if (ret) {
struct stktable_key *key;
key = stktable_fetch_key(rule->table.t, px, sess, s, SMP_OPT_DIR_RES|SMP_OPT_FINAL, rule->expr, NULL);
if (!key)
continue;
if (s->store_count < (sizeof(s->store) / sizeof(s->store[0]))) {
struct stksess *ts;
ts = stksess_new(rule->table.t, key);
if (ts) {
s->store[s->store_count].table = rule->table.t;
s->store[s->store_count++].ts = ts;
}
}
}
}
/* process store request and store response */
for (i = 0; i < s->store_count; i++) {
struct stksess *ts;
void *ptr;
if (objt_server(s->target) && objt_server(s->target)->flags & SRV_F_NON_STICK) {
stksess_free(s->store[i].table, s->store[i].ts);
s->store[i].ts = NULL;
continue;
}
ts = stktable_lookup(s->store[i].table, s->store[i].ts);
if (ts) {
/* the entry already existed, we can free ours */
stktable_touch(s->store[i].table, ts, 1);
stksess_free(s->store[i].table, s->store[i].ts);
}
else
ts = stktable_store(s->store[i].table, s->store[i].ts, 1);
s->store[i].ts = NULL;
ptr = stktable_data_ptr(s->store[i].table, ts, STKTABLE_DT_SERVER_ID);
stktable_data_cast(ptr, server_id) = objt_server(s->target)->puid;
}
s->store_count = 0; /* everything is stored */
rep->analysers &= ~an_bit;
rep->analyse_exp = TICK_ETERNITY;
return 1;
}
/* This macro is very specific to the function below. See the comments in
* process_stream() below to understand the logic and the tests.
*/
#define UPDATE_ANALYSERS(real, list, back, flag) { \
list = (((list) & ~(flag)) | ~(back)) & (real); \
back = real; \
if (!(list)) \
break; \
if (((list) ^ ((list) & ((list) - 1))) < (flag)) \
continue; \
}
/* These 2 following macros call an analayzer for the specified channel if the
* right flag is set. The first one is used for "filterable" analyzers. If a
* stream has some registered filters, pre and post analyaze callbacks are
* called. The second are used for other analyzers (AN_REQ/RES_FLT_* and
* AN_REQ/RES_HTTP_XFER_BODY) */
#define FLT_ANALYZE(strm, chn, fun, list, back, flag, ...) \
{ \
if ((list) & (flag)) { \
if (HAS_FILTERS(strm)) { \
if (!flt_pre_analyze((strm), (chn), (flag))) \
break; \
if (!fun((strm), (chn), (flag), ##__VA_ARGS__)) \
break; \
if (!flt_post_analyze((strm), (chn), (flag))) \
break; \
} \
else { \
if (!fun((strm), (chn), (flag), ##__VA_ARGS__)) \
break; \
} \
UPDATE_ANALYSERS((chn)->analysers, (list), \
(back), (flag)); \
} \
}
#define ANALYZE(strm, chn, fun, list, back, flag, ...) \
{ \
if ((list) & (flag)) { \
if (!fun((strm), (chn), (flag), ##__VA_ARGS__)) \
break; \
UPDATE_ANALYSERS((chn)->analysers, (list), \
(back), (flag)); \
} \
}
/* Processes the client, server, request and response jobs of a stream task,
* then puts it back to the wait queue in a clean state, or cleans up its
* resources if it must be deleted. Returns in <next> the date the task wants
* to be woken up, or TICK_ETERNITY. In order not to call all functions for
* nothing too many times, the request and response buffers flags are monitored
* and each function is called only if at least another function has changed at
* least one flag it is interested in.
*/
struct task *process_stream(struct task *t)
{
struct server *srv;
struct stream *s = t->context;
struct session *sess = s->sess;
unsigned int rqf_last, rpf_last;
unsigned int rq_prod_last, rq_cons_last;
unsigned int rp_cons_last, rp_prod_last;
unsigned int req_ana_back;
struct channel *req, *res;
struct stream_interface *si_f, *si_b;
req = &s->req;
res = &s->res;
si_f = &s->si[0];
si_b = &s->si[1];
//DPRINTF(stderr, "%s:%d: cs=%d ss=%d(%d) rqf=0x%08x rpf=0x%08x\n", __FUNCTION__, __LINE__,
// si_f->state, si_b->state, si_b->err_type, req->flags, res->flags);
/* this data may be no longer valid, clear it */
if (s->txn)
memset(&s->txn->auth, 0, sizeof(s->txn->auth));
/* This flag must explicitly be set every time */
req->flags &= ~(CF_READ_NOEXP|CF_WAKE_WRITE);
res->flags &= ~(CF_READ_NOEXP|CF_WAKE_WRITE);
/* Keep a copy of req/rep flags so that we can detect shutdowns */
rqf_last = req->flags & ~CF_MASK_ANALYSER;
rpf_last = res->flags & ~CF_MASK_ANALYSER;
/* we don't want the stream interface functions to recursively wake us up */
si_f->flags |= SI_FL_DONT_WAKE;
si_b->flags |= SI_FL_DONT_WAKE;
/* update pending events */
s->pending_events |= (t->state & TASK_WOKEN_ANY);
/* 1a: Check for low level timeouts if needed. We just set a flag on
* stream interfaces when their timeouts have expired.
*/
if (unlikely(s->pending_events & TASK_WOKEN_TIMER)) {
stream_int_check_timeouts(si_f);
stream_int_check_timeouts(si_b);
/* check channel timeouts, and close the corresponding stream interfaces
* for future reads or writes. Note: this will also concern upper layers
* but we do not touch any other flag. We must be careful and correctly
* detect state changes when calling them.
*/
channel_check_timeouts(req);
if (unlikely((req->flags & (CF_SHUTW|CF_WRITE_TIMEOUT)) == CF_WRITE_TIMEOUT)) {
si_b->flags |= SI_FL_NOLINGER;
si_shutw(si_b);
}
if (unlikely((req->flags & (CF_SHUTR|CF_READ_TIMEOUT)) == CF_READ_TIMEOUT)) {
if (si_f->flags & SI_FL_NOHALF)
si_f->flags |= SI_FL_NOLINGER;
si_shutr(si_f);
}
channel_check_timeouts(res);
if (unlikely((res->flags & (CF_SHUTW|CF_WRITE_TIMEOUT)) == CF_WRITE_TIMEOUT)) {
si_f->flags |= SI_FL_NOLINGER;
si_shutw(si_f);
}
if (unlikely((res->flags & (CF_SHUTR|CF_READ_TIMEOUT)) == CF_READ_TIMEOUT)) {
if (si_b->flags & SI_FL_NOHALF)
si_b->flags |= SI_FL_NOLINGER;
si_shutr(si_b);
}
if (HAS_FILTERS(s))
flt_stream_check_timeouts(s);
/* Once in a while we're woken up because the task expires. But
* this does not necessarily mean that a timeout has been reached.
* So let's not run a whole stream processing if only an expiration
* timeout needs to be refreshed.
*/
if (!((req->flags | res->flags) &
(CF_SHUTR|CF_READ_ACTIVITY|CF_READ_TIMEOUT|CF_SHUTW|
CF_WRITE_ACTIVITY|CF_WRITE_TIMEOUT|CF_ANA_TIMEOUT)) &&
!((si_f->flags | si_b->flags) & (SI_FL_EXP|SI_FL_ERR)) &&
((s->pending_events & TASK_WOKEN_ANY) == TASK_WOKEN_TIMER)) {
si_f->flags &= ~SI_FL_DONT_WAKE;
si_b->flags &= ~SI_FL_DONT_WAKE;
goto update_exp_and_leave;
}
}
/* below we may emit error messages so we have to ensure that we have
* our buffers properly allocated.
*/
if (!stream_alloc_work_buffer(s)) {
/* No buffer available, we've been subscribed to the list of
* buffer waiters, let's wait for our turn.
*/
si_f->flags &= ~SI_FL_DONT_WAKE;
si_b->flags &= ~SI_FL_DONT_WAKE;
goto update_exp_and_leave;
}
/* 1b: check for low-level errors reported at the stream interface.
* First we check if it's a retryable error (in which case we don't
* want to tell the buffer). Otherwise we report the error one level
* upper by setting flags into the buffers. Note that the side towards
* the client cannot have connect (hence retryable) errors. Also, the
* connection setup code must be able to deal with any type of abort.
*/
srv = objt_server(s->target);
if (unlikely(si_f->flags & SI_FL_ERR)) {
if (si_f->state == SI_ST_EST || si_f->state == SI_ST_DIS) {
si_shutr(si_f);
si_shutw(si_f);
stream_int_report_error(si_f);
if (!(req->analysers) && !(res->analysers)) {
s->be->be_counters.cli_aborts++;
sess->fe->fe_counters.cli_aborts++;
if (srv)
srv->counters.cli_aborts++;
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_CLICL;
if (!(s->flags & SF_FINST_MASK))
s->flags |= SF_FINST_D;
}
}
}
if (unlikely(si_b->flags & SI_FL_ERR)) {
if (si_b->state == SI_ST_EST || si_b->state == SI_ST_DIS) {
si_shutr(si_b);
si_shutw(si_b);
stream_int_report_error(si_b);
s->be->be_counters.failed_resp++;
if (srv)
srv->counters.failed_resp++;
if (!(req->analysers) && !(res->analysers)) {
s->be->be_counters.srv_aborts++;
sess->fe->fe_counters.srv_aborts++;
if (srv)
srv->counters.srv_aborts++;
if (!(s->flags & SF_ERR_MASK))
s->flags |= SF_ERR_SRVCL;
if (!(s->flags & SF_FINST_MASK))
s->flags |= SF_FINST_D;
}
}
/* note: maybe we should process connection errors here ? */
}
if (si_b->state == SI_ST_CON) {
/* we were trying to establish a connection on the server side,
* maybe it succeeded, maybe it failed, maybe we timed out, ...
*/
if (unlikely(!sess_update_st_con_tcp(s)))
sess_update_st_cer(s);
else if (si_b->state == SI_ST_EST)
sess_establish(s);
/* state is now one of SI_ST_CON (still in progress), SI_ST_EST
* (established), SI_ST_DIS (abort), SI_ST_CLO (last error),
* SI_ST_ASS/SI_ST_TAR/SI_ST_REQ for retryable errors.
*/
}
rq_prod_last = si_f->state;
rq_cons_last = si_b->state;
rp_cons_last = si_f->state;
rp_prod_last = si_b->state;
resync_stream_interface:
/* Check for connection closure */
DPRINTF(stderr,
"[%u] %s:%d: task=%p s=%p, sfl=0x%08x, rq=%p, rp=%p, exp(r,w)=%u,%u rqf=%08x rpf=%08x rqh=%d rqt=%d rph=%d rpt=%d cs=%d ss=%d, cet=0x%x set=0x%x retr=%d\n",
now_ms, __FUNCTION__, __LINE__,
t,
s, s->flags,
req, res,
req->rex, res->wex,
req->flags, res->flags,
req->buf->i, req->buf->o, res->buf->i, res->buf->o, si_f->state, si_b->state,
si_f->err_type, si_b->err_type,
si_b->conn_retries);
/* nothing special to be done on client side */
if (unlikely(si_f->state == SI_ST_DIS))
si_f->state = SI_ST_CLO;
/* When a server-side connection is released, we have to count it and
* check for pending connections on this server.
*/
if (unlikely(si_b->state == SI_ST_DIS)) {
si_b->state = SI_ST_CLO;
srv = objt_server(s->target);
if (srv) {
if (s->flags & SF_CURR_SESS) {
s->flags &= ~SF_CURR_SESS;
srv->cur_sess--;
}
sess_change_server(s, NULL);
if (may_dequeue_tasks(srv, s->be))
process_srv_queue(srv);
}
}
/*
* Note: of the transient states (REQ, CER, DIS), only REQ may remain
* at this point.
*/
resync_request:
/* Analyse request */
if (((req->flags & ~rqf_last) & CF_MASK_ANALYSER) ||
((req->flags ^ rqf_last) & CF_MASK_STATIC) ||
si_f->state != rq_prod_last ||
si_b->state != rq_cons_last ||
s->pending_events & TASK_WOKEN_MSG) {
unsigned int flags = req->flags;
if (si_f->state >= SI_ST_EST) {
int max_loops = global.tune.maxpollevents;
unsigned int ana_list;
unsigned int ana_back;
/* it's up to the analysers to stop new connections,
* disable reading or closing. Note: if an analyser
* disables any of these bits, it is responsible for
* enabling them again when it disables itself, so
* that other analysers are called in similar conditions.
*/
channel_auto_read(req);
channel_auto_connect(req);
channel_auto_close(req);
/* We will call all analysers for which a bit is set in
* req->analysers, following the bit order from LSB
* to MSB. The analysers must remove themselves from
* the list when not needed. Any analyser may return 0
* to break out of the loop, either because of missing
* data to take a decision, or because it decides to
* kill the stream. We loop at least once through each
* analyser, and we may loop again if other analysers
* are added in the middle.
*
* We build a list of analysers to run. We evaluate all
* of these analysers in the order of the lower bit to
* the higher bit. This ordering is very important.
* An analyser will often add/remove other analysers,
* including itself. Any changes to itself have no effect
* on the loop. If it removes any other analysers, we
* want those analysers not to be called anymore during
* this loop. If it adds an analyser that is located
* after itself, we want it to be scheduled for being
* processed during the loop. If it adds an analyser
* which is located before it, we want it to switch to
* it immediately, even if it has already been called
* once but removed since.
*
* In order to achieve this, we compare the analyser
* list after the call with a copy of it before the
* call. The work list is fed with analyser bits that
* appeared during the call. Then we compare previous
* work list with the new one, and check the bits that
* appeared. If the lowest of these bits is lower than
* the current bit, it means we have enabled a previous
* analyser and must immediately loop again.
*/
ana_list = ana_back = req->analysers;
while (ana_list && max_loops--) {
/* Warning! ensure that analysers are always placed in ascending order! */
ANALYZE (s, req, flt_start_analyze, ana_list, ana_back, AN_REQ_FLT_START_FE);
FLT_ANALYZE(s, req, tcp_inspect_request, ana_list, ana_back, AN_REQ_INSPECT_FE);
FLT_ANALYZE(s, req, http_wait_for_request, ana_list, ana_back, AN_REQ_WAIT_HTTP);
FLT_ANALYZE(s, req, http_wait_for_request_body, ana_list, ana_back, AN_REQ_HTTP_BODY);
FLT_ANALYZE(s, req, http_process_req_common, ana_list, ana_back, AN_REQ_HTTP_PROCESS_FE, sess->fe);
FLT_ANALYZE(s, req, process_switching_rules, ana_list, ana_back, AN_REQ_SWITCHING_RULES);
ANALYZE (s, req, flt_start_analyze, ana_list, ana_back, AN_REQ_FLT_START_BE);
FLT_ANALYZE(s, req, tcp_inspect_request, ana_list, ana_back, AN_REQ_INSPECT_BE);
FLT_ANALYZE(s, req, http_process_req_common, ana_list, ana_back, AN_REQ_HTTP_PROCESS_BE, s->be);
FLT_ANALYZE(s, req, http_process_tarpit, ana_list, ana_back, AN_REQ_HTTP_TARPIT);
FLT_ANALYZE(s, req, process_server_rules, ana_list, ana_back, AN_REQ_SRV_RULES);
FLT_ANALYZE(s, req, http_process_request, ana_list, ana_back, AN_REQ_HTTP_INNER);
FLT_ANALYZE(s, req, tcp_persist_rdp_cookie, ana_list, ana_back, AN_REQ_PRST_RDP_COOKIE);
FLT_ANALYZE(s, req, process_sticking_rules, ana_list, ana_back, AN_REQ_STICKING_RULES);
ANALYZE (s, req, flt_analyze_http_headers, ana_list, ana_back, AN_REQ_FLT_HTTP_HDRS);
ANALYZE (s, req, http_request_forward_body, ana_list, ana_back, AN_REQ_HTTP_XFER_BODY);
ANALYZE (s, req, flt_xfer_data, ana_list, ana_back, AN_REQ_FLT_XFER_DATA);
ANALYZE (s, req, flt_end_analyze, ana_list, ana_back, AN_REQ_FLT_END);
break;
}
}
rq_prod_last = si_f->state;
rq_cons_last = si_b->state;
req->flags &= ~CF_WAKE_ONCE;
rqf_last = req->flags;
if ((req->flags ^ flags) & CF_MASK_STATIC)
goto resync_request;
}
/* we'll monitor the request analysers while parsing the response,
* because some response analysers may indirectly enable new request
* analysers (eg: HTTP keep-alive).
*/
req_ana_back = req->analysers;
resync_response:
/* Analyse response */
if (((res->flags & ~rpf_last) & CF_MASK_ANALYSER) ||
(res->flags ^ rpf_last) & CF_MASK_STATIC ||
si_f->state != rp_cons_last ||
si_b->state != rp_prod_last ||
s->pending_events & TASK_WOKEN_MSG) {
unsigned int flags = res->flags;
if (si_b->state >= SI_ST_EST) {
int max_loops = global.tune.maxpollevents;
unsigned int ana_list;
unsigned int ana_back;
/* it's up to the analysers to stop disable reading or
* closing. Note: if an analyser disables any of these
* bits, it is responsible for enabling them again when
* it disables itself, so that other analysers are called
* in similar conditions.
*/
channel_auto_read(res);
channel_auto_close(res);
/* We will call all analysers for which a bit is set in
* res->analysers, following the bit order from LSB
* to MSB. The analysers must remove themselves from
* the list when not needed. Any analyser may return 0
* to break out of the loop, either because of missing
* data to take a decision, or because it decides to
* kill the stream. We loop at least once through each
* analyser, and we may loop again if other analysers
* are added in the middle.
*/
ana_list = ana_back = res->analysers;
while (ana_list && max_loops--) {
/* Warning! ensure that analysers are always placed in ascending order! */
ANALYZE (s, res, flt_start_analyze, ana_list, ana_back, AN_RES_FLT_START_FE);
ANALYZE (s, res, flt_start_analyze, ana_list, ana_back, AN_RES_FLT_START_BE);
FLT_ANALYZE(s, res, tcp_inspect_response, ana_list, ana_back, AN_RES_INSPECT);
FLT_ANALYZE(s, res, http_wait_for_response, ana_list, ana_back, AN_RES_WAIT_HTTP);
FLT_ANALYZE(s, res, process_store_rules, ana_list, ana_back, AN_RES_STORE_RULES);
FLT_ANALYZE(s, res, http_process_res_common, ana_list, ana_back, AN_RES_HTTP_PROCESS_BE, s->be);
ANALYZE (s, res, flt_analyze_http_headers, ana_list, ana_back, AN_RES_FLT_HTTP_HDRS);
ANALYZE (s, res, http_response_forward_body, ana_list, ana_back, AN_RES_HTTP_XFER_BODY);
ANALYZE (s, res, flt_xfer_data, ana_list, ana_back, AN_RES_FLT_XFER_DATA);
ANALYZE (s, res, flt_end_analyze, ana_list, ana_back, AN_RES_FLT_END);
break;
}
}
rp_cons_last = si_f->state;
rp_prod_last = si_b->state;
res->flags &= ~CF_WAKE_ONCE;
rpf_last = res->flags;
if ((res->flags ^ flags) & CF_MASK_STATIC)
goto resync_response;
}
/* maybe someone has added some request analysers, so we must check and loop */
if (req->analysers & ~req_ana_back)
goto resync_request;
if ((req->flags & ~rqf_last) & CF_MASK_ANALYSER)
goto resync_request;
/* FIXME: here we should call protocol handlers which rely on
* both buffers.
*/
/*
* Now we propagate unhandled errors to the stream. Normally
* we're just in a data phase here since it means we have not
* seen any analyser who could set an error status.
*/
srv = objt_server(s->target);
if (unlikely(!(s->flags & SF_ERR_MASK))) {
if (req->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) {
/* Report it if the client got an error or a read timeout expired */
req->analysers = 0;
if (req->flags & CF_READ_ERROR) {
s->be->be_counters.cli_aborts++;
sess->fe->fe_counters.cli_aborts++;
if (srv)
srv->counters.cli_aborts++;
s->flags |= SF_ERR_CLICL;
}
else if (req->flags & CF_READ_TIMEOUT) {
s->be->be_counters.cli_aborts++;
sess->fe->fe_counters.cli_aborts++;
if (srv)
srv->counters.cli_aborts++;
s->flags |= SF_ERR_CLITO;
}
else if (req->flags & CF_WRITE_ERROR) {
s->be->be_counters.srv_aborts++;
sess->fe->fe_counters.srv_aborts++;
if (srv)
srv->counters.srv_aborts++;
s->flags |= SF_ERR_SRVCL;
}
else {
s->be->be_counters.srv_aborts++;
sess->fe->fe_counters.srv_aborts++;
if (srv)
srv->counters.srv_aborts++;
s->flags |= SF_ERR_SRVTO;
}
sess_set_term_flags(s);
}
else if (res->flags & (CF_READ_ERROR|CF_READ_TIMEOUT|CF_WRITE_ERROR|CF_WRITE_TIMEOUT)) {
/* Report it if the server got an error or a read timeout expired */
res->analysers = 0;
if (res->flags & CF_READ_ERROR) {
s->be->be_counters.srv_aborts++;
sess->fe->fe_counters.srv_aborts++;
if (srv)
srv->counters.srv_aborts++;
s->flags |= SF_ERR_SRVCL;
}
else if (res->flags & CF_READ_TIMEOUT) {
s->be->be_counters.srv_aborts++;
sess->fe->fe_counters.srv_aborts++;
if (srv)
srv->counters.srv_aborts++;
s->flags |= SF_ERR_SRVTO;
}
else if (res->flags & CF_WRITE_ERROR) {
s->be->be_counters.cli_aborts++;
sess->fe->fe_counters.cli_aborts++;
if (srv)
srv->counters.cli_aborts++;
s->flags |= SF_ERR_CLICL;
}
else {
s->be->be_counters.cli_aborts++;
sess->fe->fe_counters.cli_aborts++;
if (srv)
srv->counters.cli_aborts++;
s->flags |= SF_ERR_CLITO;
}
sess_set_term_flags(s);
}
}
/*
* Here we take care of forwarding unhandled data. This also includes
* connection establishments and shutdown requests.
*/
/* If noone is interested in analysing data, it's time to forward
* everything. We configure the buffer to forward indefinitely.
* Note that we're checking CF_SHUTR_NOW as an indication of a possible
* recent call to channel_abort().
*/
if (unlikely((!req->analysers || (req->analysers == AN_REQ_FLT_END && !(req->flags & CF_FLT_ANALYZE))) &&
!(req->flags & (CF_SHUTW|CF_SHUTR_NOW)) &&
(si_f->state >= SI_ST_EST) &&
(req->to_forward != CHN_INFINITE_FORWARD))) {
/* This buffer is freewheeling, there's no analyser
* attached to it. If any data are left in, we'll permit them to
* move.
*/
channel_auto_read(req);
channel_auto_connect(req);
channel_auto_close(req);
buffer_flush(req->buf);
/* We'll let data flow between the producer (if still connected)
* to the consumer (which might possibly not be connected yet).
*/
if (!(req->flags & (CF_SHUTR|CF_SHUTW_NOW)))
channel_forward_forever(req);
/* Just in order to support fetching HTTP contents after start
* of forwarding when the HTTP forwarding analyser is not used,
* we simply reset msg->sov so that HTTP rewinding points to the
* headers.
*/
if (s->txn)
s->txn->req.sov = s->txn->req.eoh + s->txn->req.eol - req->buf->o;
}
/* check if it is wise to enable kernel splicing to forward request data */
if (!(req->flags & (CF_KERN_SPLICING|CF_SHUTR)) &&
req->to_forward &&
(global.tune.options & GTUNE_USE_SPLICE) &&
(objt_conn(si_f->end) && __objt_conn(si_f->end)->xprt && __objt_conn(si_f->end)->xprt->rcv_pipe) &&
(objt_conn(si_b->end) && __objt_conn(si_b->end)->xprt && __objt_conn(si_b->end)->xprt->snd_pipe) &&
(pipes_used < global.maxpipes) &&
(((sess->fe->options2|s->be->options2) & PR_O2_SPLIC_REQ) ||
(((sess->fe->options2|s->be->options2) & PR_O2_SPLIC_AUT) &&
(req->flags & CF_STREAMER_FAST)))) {
req->flags |= CF_KERN_SPLICING;
}
/* reflect what the L7 analysers have seen last */
rqf_last = req->flags;
/*
* Now forward all shutdown requests between both sides of the buffer
*/
/* first, let's check if the request buffer needs to shutdown(write), which may
* happen either because the input is closed or because we want to force a close
* once the server has begun to respond. If a half-closed timeout is set, we adjust
* the other side's timeout as well.
*/
if (unlikely((req->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_AUTO_CLOSE|CF_SHUTR)) ==
(CF_AUTO_CLOSE|CF_SHUTR))) {
channel_shutw_now(req);
}
/* shutdown(write) pending */
if (unlikely((req->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW &&
channel_is_empty(req))) {
if (req->flags & CF_READ_ERROR)
si_b->flags |= SI_FL_NOLINGER;
si_shutw(si_b);
}
/* shutdown(write) done on server side, we must stop the client too */
if (unlikely((req->flags & (CF_SHUTW|CF_SHUTR|CF_SHUTR_NOW)) == CF_SHUTW &&
!req->analysers))
channel_shutr_now(req);
/* shutdown(read) pending */
if (unlikely((req->flags & (CF_SHUTR|CF_SHUTR_NOW)) == CF_SHUTR_NOW)) {
if (si_f->flags & SI_FL_NOHALF)
si_f->flags |= SI_FL_NOLINGER;
si_shutr(si_f);
}
/* it's possible that an upper layer has requested a connection setup or abort.
* There are 2 situations where we decide to establish a new connection :
* - there are data scheduled for emission in the buffer
* - the CF_AUTO_CONNECT flag is set (active connection)
*/
if (si_b->state == SI_ST_INI) {
if (!(req->flags & CF_SHUTW)) {
if ((req->flags & CF_AUTO_CONNECT) || !channel_is_empty(req)) {
/* If we have an appctx, there is no connect method, so we
* immediately switch to the connected state, otherwise we
* perform a connection request.
*/
si_b->state = SI_ST_REQ; /* new connection requested */
si_b->conn_retries = s->be->conn_retries;
}
}
else {
si_b->state = SI_ST_CLO; /* shutw+ini = abort */
channel_shutw_now(req); /* fix buffer flags upon abort */
channel_shutr_now(res);
}
}
/* we may have a pending connection request, or a connection waiting
* for completion.
*/
if (si_b->state >= SI_ST_REQ && si_b->state < SI_ST_CON) {
/* prune the request variables and swap to the response variables. */
if (s->vars_reqres.scope != SCOPE_RES) {
vars_prune(&s->vars_reqres, s->sess, s);
vars_init(&s->vars_reqres, SCOPE_RES);
}
do {
/* nb: step 1 might switch from QUE to ASS, but we first want
* to give a chance to step 2 to perform a redirect if needed.
*/
if (si_b->state != SI_ST_REQ)
sess_update_stream_int(s);
if (si_b->state == SI_ST_REQ)
sess_prepare_conn_req(s);
/* applets directly go to the ESTABLISHED state. Similarly,
* servers experience the same fate when their connection
* is reused.
*/
if (unlikely(si_b->state == SI_ST_EST))
sess_establish(s);
/* Now we can add the server name to a header (if requested) */
/* check for HTTP mode and proxy server_name_hdr_name != NULL */
if ((si_b->state >= SI_ST_CON) && (si_b->state < SI_ST_CLO) &&
(s->be->server_id_hdr_name != NULL) &&
(s->be->mode == PR_MODE_HTTP) &&
objt_server(s->target)) {
http_send_name_header(s->txn, s->be, objt_server(s->target)->id);
}
srv = objt_server(s->target);
if (si_b->state == SI_ST_ASS && srv && srv->rdr_len && (s->flags & SF_REDIRECTABLE))
http_perform_server_redirect(s, si_b);
} while (si_b->state == SI_ST_ASS);
}
/* Benchmarks have shown that it's optimal to do a full resync now */
if (si_f->state == SI_ST_DIS || si_b->state == SI_ST_DIS)
goto resync_stream_interface;
/* otherwise we want to check if we need to resync the req buffer or not */
if ((req->flags ^ rqf_last) & CF_MASK_STATIC)
goto resync_request;
/* perform output updates to the response buffer */
/* If noone is interested in analysing data, it's time to forward
* everything. We configure the buffer to forward indefinitely.
* Note that we're checking CF_SHUTR_NOW as an indication of a possible
* recent call to channel_abort().
*/
if (unlikely((!res->analysers || (res->analysers == AN_RES_FLT_END && !(res->flags & CF_FLT_ANALYZE))) &&
!(res->flags & (CF_SHUTW|CF_SHUTR_NOW)) &&
(si_b->state >= SI_ST_EST) &&
(res->to_forward != CHN_INFINITE_FORWARD))) {
/* This buffer is freewheeling, there's no analyser
* attached to it. If any data are left in, we'll permit them to
* move.
*/
channel_auto_read(res);
channel_auto_close(res);
buffer_flush(res->buf);
/* We'll let data flow between the producer (if still connected)
* to the consumer.
*/
if (!(res->flags & (CF_SHUTR|CF_SHUTW_NOW)))
channel_forward_forever(res);
/* Just in order to support fetching HTTP contents after start
* of forwarding when the HTTP forwarding analyser is not used,
* we simply reset msg->sov so that HTTP rewinding points to the
* headers.
*/
if (s->txn)
s->txn->rsp.sov = s->txn->rsp.eoh + s->txn->rsp.eol - res->buf->o;
/* if we have no analyser anymore in any direction and have a
* tunnel timeout set, use it now. Note that we must respect
* the half-closed timeouts as well.
*/
if (!req->analysers && s->be->timeout.tunnel) {
req->rto = req->wto = res->rto = res->wto =
s->be->timeout.tunnel;
if ((req->flags & CF_SHUTR) && tick_isset(sess->fe->timeout.clientfin))
res->wto = sess->fe->timeout.clientfin;
if ((req->flags & CF_SHUTW) && tick_isset(s->be->timeout.serverfin))
res->rto = s->be->timeout.serverfin;
if ((res->flags & CF_SHUTR) && tick_isset(s->be->timeout.serverfin))
req->wto = s->be->timeout.serverfin;
if ((res->flags & CF_SHUTW) && tick_isset(sess->fe->timeout.clientfin))
req->rto = sess->fe->timeout.clientfin;
req->rex = tick_add(now_ms, req->rto);
req->wex = tick_add(now_ms, req->wto);
res->rex = tick_add(now_ms, res->rto);
res->wex = tick_add(now_ms, res->wto);
}
}
/* check if it is wise to enable kernel splicing to forward response data */
if (!(res->flags & (CF_KERN_SPLICING|CF_SHUTR)) &&
res->to_forward &&
(global.tune.options & GTUNE_USE_SPLICE) &&
(objt_conn(si_f->end) && __objt_conn(si_f->end)->xprt && __objt_conn(si_f->end)->xprt->snd_pipe) &&
(objt_conn(si_b->end) && __objt_conn(si_b->end)->xprt && __objt_conn(si_b->end)->xprt->rcv_pipe) &&
(pipes_used < global.maxpipes) &&
(((sess->fe->options2|s->be->options2) & PR_O2_SPLIC_RTR) ||
(((sess->fe->options2|s->be->options2) & PR_O2_SPLIC_AUT) &&
(res->flags & CF_STREAMER_FAST)))) {
res->flags |= CF_KERN_SPLICING;
}
/* reflect what the L7 analysers have seen last */
rpf_last = res->flags;
/*
* Now forward all shutdown requests between both sides of the buffer
*/
/*
* FIXME: this is probably where we should produce error responses.
*/
/* first, let's check if the response buffer needs to shutdown(write) */
if (unlikely((res->flags & (CF_SHUTW|CF_SHUTW_NOW|CF_AUTO_CLOSE|CF_SHUTR)) ==
(CF_AUTO_CLOSE|CF_SHUTR))) {
channel_shutw_now(res);
}
/* shutdown(write) pending */
if (unlikely((res->flags & (CF_SHUTW|CF_SHUTW_NOW)) == CF_SHUTW_NOW &&
channel_is_empty(res))) {
si_shutw(si_f);
}
/* shutdown(write) done on the client side, we must stop the server too */
if (unlikely((res->flags & (CF_SHUTW|CF_SHUTR|CF_SHUTR_NOW)) == CF_SHUTW) &&
!res->analysers)
channel_shutr_now(res);
/* shutdown(read) pending */
if (unlikely((res->flags & (CF_SHUTR|CF_SHUTR_NOW)) == CF_SHUTR_NOW)) {
if (si_b->flags & SI_FL_NOHALF)
si_b->flags |= SI_FL_NOLINGER;
si_shutr(si_b);
}
if (si_f->state == SI_ST_DIS || si_b->state == SI_ST_DIS)
goto resync_stream_interface;
if (req->flags != rqf_last)
goto resync_request;
if ((res->flags ^ rpf_last) & CF_MASK_STATIC)
goto resync_response;
/* we're interested in getting wakeups again */
si_f->flags &= ~SI_FL_DONT_WAKE;
si_b->flags &= ~SI_FL_DONT_WAKE;
/* This is needed only when debugging is enabled, to indicate
* client-side or server-side close. Please note that in the unlikely
* event where both sides would close at once, the sequence is reported
* on the server side first.
*/
if (unlikely((global.mode & MODE_DEBUG) &&
(!(global.mode & MODE_QUIET) ||
(global.mode & MODE_VERBOSE)))) {
if (si_b->state == SI_ST_CLO &&
si_b->prev_state == SI_ST_EST) {
chunk_printf(&trash, "%08x:%s.srvcls[%04x:%04x]\n",
s->uniq_id, s->be->id,
objt_conn(si_f->end) ? (unsigned short)objt_conn(si_f->end)->handle.fd : -1,
objt_conn(si_b->end) ? (unsigned short)objt_conn(si_b->end)->handle.fd : -1);
shut_your_big_mouth_gcc(write(1, trash.str, trash.len));
}
if (si_f->state == SI_ST_CLO &&
si_f->prev_state == SI_ST_EST) {
chunk_printf(&trash, "%08x:%s.clicls[%04x:%04x]\n",
s->uniq_id, s->be->id,
objt_conn(si_f->end) ? (unsigned short)objt_conn(si_f->end)->handle.fd : -1,
objt_conn(si_b->end) ? (unsigned short)objt_conn(si_b->end)->handle.fd : -1);
shut_your_big_mouth_gcc(write(1, trash.str, trash.len));
}
}
if (likely((si_f->state != SI_ST_CLO) ||
(si_b->state > SI_ST_INI && si_b->state < SI_ST_CLO))) {
if ((sess->fe->options & PR_O_CONTSTATS) && (s->flags & SF_BE_ASSIGNED))
stream_process_counters(s);
if (si_f->state == SI_ST_EST)
si_update(si_f);
if (si_b->state == SI_ST_EST)
si_update(si_b);
req->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_WRITE_NULL|CF_WRITE_PARTIAL|CF_READ_ATTACHED);
res->flags &= ~(CF_READ_NULL|CF_READ_PARTIAL|CF_WRITE_NULL|CF_WRITE_PARTIAL|CF_READ_ATTACHED);
si_f->prev_state = si_f->state;
si_b->prev_state = si_b->state;
si_f->flags &= ~(SI_FL_ERR|SI_FL_EXP);
si_b->flags &= ~(SI_FL_ERR|SI_FL_EXP);
/* Trick: if a request is being waiting for the server to respond,
* and if we know the server can timeout, we don't want the timeout
* to expire on the client side first, but we're still interested
* in passing data from the client to the server (eg: POST). Thus,
* we can cancel the client's request timeout if the server's
* request timeout is set and the server has not yet sent a response.
*/
if ((res->flags & (CF_AUTO_CLOSE|CF_SHUTR)) == 0 &&
(tick_isset(req->wex) || tick_isset(res->rex))) {
req->flags |= CF_READ_NOEXP;
req->rex = TICK_ETERNITY;
}
/* Reset pending events now */
s->pending_events = 0;
update_exp_and_leave:
/* Note: please ensure that if you branch here you disable SI_FL_DONT_WAKE */
t->expire = tick_first((tick_is_expired(t->expire, now_ms) ? 0 : t->expire),
tick_first(tick_first(req->rex, req->wex),
tick_first(res->rex, res->wex)));
if (!req->analysers)
req->analyse_exp = TICK_ETERNITY;
if ((sess->fe->options & PR_O_CONTSTATS) && (s->flags & SF_BE_ASSIGNED) &&
(!tick_isset(req->analyse_exp) || tick_is_expired(req->analyse_exp, now_ms)))
req->analyse_exp = tick_add(now_ms, 5000);
t->expire = tick_first(t->expire, req->analyse_exp);
if (si_f->exp)
t->expire = tick_first(t->expire, si_f->exp);
if (si_b->exp)
t->expire = tick_first(t->expire, si_b->exp);
#ifdef DEBUG_FULL
fprintf(stderr,
"[%u] queuing with exp=%u req->rex=%u req->wex=%u req->ana_exp=%u"
" rep->rex=%u rep->wex=%u, si[0].exp=%u, si[1].exp=%u, cs=%d, ss=%d\n",
now_ms, t->expire, req->rex, req->wex, req->analyse_exp,
res->rex, res->wex, si_f->exp, si_b->exp, si_f->state, si_b->state);
#endif
#ifdef DEBUG_DEV
/* this may only happen when no timeout is set or in case of an FSM bug */
if (!tick_isset(t->expire))
ABORT_NOW();
#endif
s->pending_events &= ~(TASK_WOKEN_TIMER | TASK_WOKEN_RES);
stream_release_buffers(s);
return t; /* nothing more to do */
}
sess->fe->feconn--;
if (s->flags & SF_BE_ASSIGNED)
s->be->beconn--;
jobs--;
if (sess->listener) {
if (!(sess->listener->options & LI_O_UNLIMITED))
actconn--;
sess->listener->nbconn--;
if (sess->listener->state == LI_FULL)
resume_listener(sess->listener);
/* Dequeues all of the listeners waiting for a resource */
if (!LIST_ISEMPTY(&global_listener_queue))
dequeue_all_listeners(&global_listener_queue);
if (!LIST_ISEMPTY(&sess->fe->listener_queue) &&
(!sess->fe->fe_sps_lim || freq_ctr_remain(&sess->fe->fe_sess_per_sec, sess->fe->fe_sps_lim, 0) > 0))
dequeue_all_listeners(&sess->fe->listener_queue);
}
if (unlikely((global.mode & MODE_DEBUG) &&
(!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
chunk_printf(&trash, "%08x:%s.closed[%04x:%04x]\n",
s->uniq_id, s->be->id,
objt_conn(si_f->end) ? (unsigned short)objt_conn(si_f->end)->handle.fd : -1,
objt_conn(si_b->end) ? (unsigned short)objt_conn(si_b->end)->handle.fd : -1);
shut_your_big_mouth_gcc(write(1, trash.str, trash.len));
}
s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
stream_process_counters(s);
if (s->txn && s->txn->status) {
int n;
n = s->txn->status / 100;
if (n < 1 || n > 5)
n = 0;
if (sess->fe->mode == PR_MODE_HTTP) {
sess->fe->fe_counters.p.http.rsp[n]++;
}
if ((s->flags & SF_BE_ASSIGNED) &&
(s->be->mode == PR_MODE_HTTP)) {
s->be->be_counters.p.http.rsp[n]++;
s->be->be_counters.p.http.cum_req++;
}
}
/* let's do a final log if we need it */
if (!LIST_ISEMPTY(&sess->fe->logformat) && s->logs.logwait &&
!(s->flags & SF_MONITOR) &&
(!(sess->fe->options & PR_O_NULLNOLOG) || req->total)) {
s->do_log(s);
}
/* update time stats for this stream */
stream_update_time_stats(s);
/* the task MUST not be in the run queue anymore */
stream_free(s);
task_delete(t);
task_free(t);
return NULL;
}
/* Update the stream's backend and server time stats */
void stream_update_time_stats(struct stream *s)
{
int t_request;
int t_queue;
int t_connect;
int t_data;
int t_close;
struct server *srv;
t_request = 0;
t_queue = s->logs.t_queue;
t_connect = s->logs.t_connect;
t_close = s->logs.t_close;
t_data = s->logs.t_data;
if (s->be->mode != PR_MODE_HTTP)
t_data = t_connect;
if (t_connect < 0 || t_data < 0)
return;
if (tv_isge(&s->logs.tv_request, &s->logs.tv_accept))
t_request = tv_ms_elapsed(&s->logs.tv_accept, &s->logs.tv_request);
t_data -= t_connect;
t_connect -= t_queue;
t_queue -= t_request;
srv = objt_server(s->target);
if (srv) {
swrate_add(&srv->counters.q_time, TIME_STATS_SAMPLES, t_queue);
swrate_add(&srv->counters.c_time, TIME_STATS_SAMPLES, t_connect);
swrate_add(&srv->counters.d_time, TIME_STATS_SAMPLES, t_data);
swrate_add(&srv->counters.t_time, TIME_STATS_SAMPLES, t_close);
}
swrate_add(&s->be->be_counters.q_time, TIME_STATS_SAMPLES, t_queue);
swrate_add(&s->be->be_counters.c_time, TIME_STATS_SAMPLES, t_connect);
swrate_add(&s->be->be_counters.d_time, TIME_STATS_SAMPLES, t_data);
swrate_add(&s->be->be_counters.t_time, TIME_STATS_SAMPLES, t_close);
}
/*
* This function adjusts sess->srv_conn and maintains the previous and new
* server's served stream counts. Setting newsrv to NULL is enough to release
* current connection slot. This function also notifies any LB algo which might
* expect to be informed about any change in the number of active streams on a
* server.
*/
void sess_change_server(struct stream *sess, struct server *newsrv)
{
if (sess->srv_conn == newsrv)
return;
if (sess->srv_conn) {
sess->srv_conn->served--;
sess->srv_conn->proxy->served--;
if (sess->srv_conn->proxy->lbprm.server_drop_conn)
sess->srv_conn->proxy->lbprm.server_drop_conn(sess->srv_conn);
stream_del_srv_conn(sess);
}
if (newsrv) {
newsrv->served++;
newsrv->proxy->served++;
if (newsrv->proxy->lbprm.server_take_conn)
newsrv->proxy->lbprm.server_take_conn(newsrv);
stream_add_srv_conn(sess, newsrv);
}
}
/* Handle server-side errors for default protocols. It is called whenever a a
* connection setup is aborted or a request is aborted in queue. It sets the
* stream termination flags so that the caller does not have to worry about
* them. It's installed as ->srv_error for the server-side stream_interface.
*/
void default_srv_error(struct stream *s, struct stream_interface *si)
{
int err_type = si->err_type;
int err = 0, fin = 0;
if (err_type & SI_ET_QUEUE_ABRT) {
err = SF_ERR_CLICL;
fin = SF_FINST_Q;
}
else if (err_type & SI_ET_CONN_ABRT) {
err = SF_ERR_CLICL;
fin = SF_FINST_C;
}
else if (err_type & SI_ET_QUEUE_TO) {
err = SF_ERR_SRVTO;
fin = SF_FINST_Q;
}
else if (err_type & SI_ET_QUEUE_ERR) {
err = SF_ERR_SRVCL;
fin = SF_FINST_Q;
}
else if (err_type & SI_ET_CONN_TO) {
err = SF_ERR_SRVTO;
fin = SF_FINST_C;
}
else if (err_type & SI_ET_CONN_ERR) {
err = SF_ERR_SRVCL;
fin = SF_FINST_C;
}
else if (err_type & SI_ET_CONN_RES) {
err = SF_ERR_RESOURCE;
fin = SF_FINST_C;
}
else /* SI_ET_CONN_OTHER and others */ {
err = SF_ERR_INTERNAL;
fin = SF_FINST_C;
}
if (!(s->flags & SF_ERR_MASK))
s->flags |= err;
if (!(s->flags & SF_FINST_MASK))
s->flags |= fin;
}
/* kill a stream and set the termination flags to <why> (one of SF_ERR_*) */
void stream_shutdown(struct stream *stream, int why)
{
if (stream->req.flags & (CF_SHUTW|CF_SHUTW_NOW))
return;
channel_shutw_now(&stream->req);
channel_shutr_now(&stream->res);
stream->task->nice = 1024;
if (!(stream->flags & SF_ERR_MASK))
stream->flags |= why;
task_wakeup(stream->task, TASK_WOKEN_OTHER);
}
/************************************************************************/
/* All supported ACL keywords must be declared here. */
/************************************************************************/
/* 0=OK, <0=Alert, >0=Warning */
static enum act_parse_ret stream_parse_use_service(const char **args, int *cur_arg,
struct proxy *px, struct act_rule *rule,
char **err)
{
struct action_kw *kw;
/* Check if the service name exists. */
if (*(args[*cur_arg]) == 0) {
memprintf(err, "'%s' expects a service name.", args[0]);
return ACT_RET_PRS_ERR;
}
/* lookup for keyword corresponding to a service. */
kw = action_lookup(&service_keywords, args[*cur_arg]);
if (!kw) {
memprintf(err, "'%s' unknown service name.", args[1]);
return ACT_RET_PRS_ERR;
}
(*cur_arg)++;
/* executes specific rule parser. */
rule->kw = kw;
if (kw->parse((const char **)args, cur_arg, px, rule, err) == ACT_RET_PRS_ERR)
return ACT_RET_PRS_ERR;
/* Register processing function. */
rule->action_ptr = process_use_service;
rule->action = ACT_CUSTOM;
return ACT_RET_PRS_OK;
}
void service_keywords_register(struct action_kw_list *kw_list)
{
LIST_ADDQ(&service_keywords, &kw_list->list);
}
/* This function dumps a complete stream state onto the stream interface's
* read buffer. The stream has to be set in strm. It returns 0 if the output
* buffer is full and it needs to be called again, otherwise non-zero. It is
* designed to be called from stats_dump_strm_to_buffer() below.
*/
static int stats_dump_full_strm_to_buffer(struct stream_interface *si, struct stream *strm)
{
struct appctx *appctx = __objt_appctx(si->end);
struct tm tm;
extern const char *monthname[12];
char pn[INET6_ADDRSTRLEN];
struct connection *conn;
struct appctx *tmpctx;
chunk_reset(&trash);
if (appctx->ctx.sess.section > 0 && appctx->ctx.sess.uid != strm->uniq_id) {
/* stream changed, no need to go any further */
chunk_appendf(&trash, " *** session terminated while we were watching it ***\n");
if (bi_putchk(si_ic(si), &trash) == -1) {
si_applet_cant_put(si);
return 0;
}
appctx->ctx.sess.uid = 0;
appctx->ctx.sess.section = 0;
return 1;
}
switch (appctx->ctx.sess.section) {
case 0: /* main status of the stream */
appctx->ctx.sess.uid = strm->uniq_id;
appctx->ctx.sess.section = 1;
/* fall through */
case 1:
get_localtime(strm->logs.accept_date.tv_sec, &tm);
chunk_appendf(&trash,
"%p: [%02d/%s/%04d:%02d:%02d:%02d.%06d] id=%u proto=%s",
strm,
tm.tm_mday, monthname[tm.tm_mon], tm.tm_year+1900,
tm.tm_hour, tm.tm_min, tm.tm_sec, (int)(strm->logs.accept_date.tv_usec),
strm->uniq_id,
strm_li(strm) ? strm_li(strm)->proto->name : "?");
conn = objt_conn(strm_orig(strm));
switch (conn ? addr_to_str(&conn->addr.from, pn, sizeof(pn)) : AF_UNSPEC) {
case AF_INET:
case AF_INET6:
chunk_appendf(&trash, " source=%s:%d\n",
pn, get_host_port(&conn->addr.from));
break;
case AF_UNIX:
chunk_appendf(&trash, " source=unix:%d\n", strm_li(strm)->luid);
break;
default:
/* no more information to print right now */
chunk_appendf(&trash, "\n");
break;
}
chunk_appendf(&trash,
" flags=0x%x, conn_retries=%d, srv_conn=%p, pend_pos=%p\n",
strm->flags, strm->si[1].conn_retries, strm->srv_conn, strm->pend_pos);
chunk_appendf(&trash,
" frontend=%s (id=%u mode=%s), listener=%s (id=%u)",
strm_fe(strm)->id, strm_fe(strm)->uuid, strm_fe(strm)->mode ? "http" : "tcp",
strm_li(strm) ? strm_li(strm)->name ? strm_li(strm)->name : "?" : "?",
strm_li(strm) ? strm_li(strm)->luid : 0);
if (conn)
conn_get_to_addr(conn);
switch (conn ? addr_to_str(&conn->addr.to, pn, sizeof(pn)) : AF_UNSPEC) {
case AF_INET:
case AF_INET6:
chunk_appendf(&trash, " addr=%s:%d\n",
pn, get_host_port(&conn->addr.to));
break;
case AF_UNIX:
chunk_appendf(&trash, " addr=unix:%d\n", strm_li(strm)->luid);
break;
default:
/* no more information to print right now */
chunk_appendf(&trash, "\n");
break;
}
if (strm->be->cap & PR_CAP_BE)
chunk_appendf(&trash,
" backend=%s (id=%u mode=%s)",
strm->be->id,
strm->be->uuid, strm->be->mode ? "http" : "tcp");
else
chunk_appendf(&trash, " backend=<NONE> (id=-1 mode=-)");
conn = objt_conn(strm->si[1].end);
if (conn)
conn_get_from_addr(conn);
switch (conn ? addr_to_str(&conn->addr.from, pn, sizeof(pn)) : AF_UNSPEC) {
case AF_INET:
case AF_INET6:
chunk_appendf(&trash, " addr=%s:%d\n",
pn, get_host_port(&conn->addr.from));
break;
case AF_UNIX:
chunk_appendf(&trash, " addr=unix\n");
break;
default:
/* no more information to print right now */
chunk_appendf(&trash, "\n");
break;
}
if (strm->be->cap & PR_CAP_BE)
chunk_appendf(&trash,
" server=%s (id=%u)",
objt_server(strm->target) ? objt_server(strm->target)->id : "<none>",
objt_server(strm->target) ? objt_server(strm->target)->puid : 0);
else
chunk_appendf(&trash, " server=<NONE> (id=-1)");
if (conn)
conn_get_to_addr(conn);
switch (conn ? addr_to_str(&conn->addr.to, pn, sizeof(pn)) : AF_UNSPEC) {
case AF_INET:
case AF_INET6:
chunk_appendf(&trash, " addr=%s:%d\n",
pn, get_host_port(&conn->addr.to));
break;
case AF_UNIX:
chunk_appendf(&trash, " addr=unix\n");
break;
default:
/* no more information to print right now */
chunk_appendf(&trash, "\n");
break;
}
chunk_appendf(&trash,
" task=%p (state=0x%02x nice=%d calls=%d exp=%s%s",
strm->task,
strm->task->state,
strm->task->nice, strm->task->calls,
strm->task->expire ?
tick_is_expired(strm->task->expire, now_ms) ? "<PAST>" :
human_time(TICKS_TO_MS(strm->task->expire - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>",
task_in_rq(strm->task) ? ", running" : "");
chunk_appendf(&trash,
" age=%s)\n",
human_time(now.tv_sec - strm->logs.accept_date.tv_sec, 1));
if (strm->txn)
chunk_appendf(&trash,
" txn=%p flags=0x%x meth=%d status=%d req.st=%s rsp.st=%s waiting=%d\n",
strm->txn, strm->txn->flags, strm->txn->meth, strm->txn->status,
http_msg_state_str(strm->txn->req.msg_state), http_msg_state_str(strm->txn->rsp.msg_state), !LIST_ISEMPTY(&strm->buffer_wait.list));
chunk_appendf(&trash,
" si[0]=%p (state=%s flags=0x%02x endp0=%s:%p exp=%s, et=0x%03x)\n",
&strm->si[0],
si_state_str(strm->si[0].state),
strm->si[0].flags,
obj_type_name(strm->si[0].end),
obj_base_ptr(strm->si[0].end),
strm->si[0].exp ?
tick_is_expired(strm->si[0].exp, now_ms) ? "<PAST>" :
human_time(TICKS_TO_MS(strm->si[0].exp - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>",
strm->si[0].err_type);
chunk_appendf(&trash,
" si[1]=%p (state=%s flags=0x%02x endp1=%s:%p exp=%s, et=0x%03x)\n",
&strm->si[1],
si_state_str(strm->si[1].state),
strm->si[1].flags,
obj_type_name(strm->si[1].end),
obj_base_ptr(strm->si[1].end),
strm->si[1].exp ?
tick_is_expired(strm->si[1].exp, now_ms) ? "<PAST>" :
human_time(TICKS_TO_MS(strm->si[1].exp - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>",
strm->si[1].err_type);
if ((conn = objt_conn(strm->si[0].end)) != NULL) {
chunk_appendf(&trash,
" co0=%p ctrl=%s xprt=%s data=%s target=%s:%p\n",
conn,
conn_get_ctrl_name(conn),
conn_get_xprt_name(conn),
conn_get_data_name(conn),
obj_type_name(conn->target),
obj_base_ptr(conn->target));
chunk_appendf(&trash,
" flags=0x%08x fd=%d fd.state=%02x fd.cache=%d updt=%d\n",
conn->flags,
conn->handle.fd,
conn->handle.fd >= 0 ? fdtab[conn->handle.fd].state : 0,
conn->handle.fd >= 0 ? fdtab[conn->handle.fd].cache : 0,
conn->handle.fd >= 0 ? fdtab[conn->handle.fd].updated : 0);
}
else if ((tmpctx = objt_appctx(strm->si[0].end)) != NULL) {
chunk_appendf(&trash,
" app0=%p st0=%d st1=%d st2=%d applet=%s\n",
tmpctx,
tmpctx->st0,
tmpctx->st1,
tmpctx->st2,
tmpctx->applet->name);
}
if ((conn = objt_conn(strm->si[1].end)) != NULL) {
chunk_appendf(&trash,
" co1=%p ctrl=%s xprt=%s data=%s target=%s:%p\n",
conn,
conn_get_ctrl_name(conn),
conn_get_xprt_name(conn),
conn_get_data_name(conn),
obj_type_name(conn->target),
obj_base_ptr(conn->target));
chunk_appendf(&trash,
" flags=0x%08x fd=%d fd.state=%02x fd.cache=%d updt=%d\n",
conn->flags,
conn->handle.fd,
conn->handle.fd >= 0 ? fdtab[conn->handle.fd].state : 0,
conn->handle.fd >= 0 ? fdtab[conn->handle.fd].cache : 0,
conn->handle.fd >= 0 ? fdtab[conn->handle.fd].updated : 0);
}
else if ((tmpctx = objt_appctx(strm->si[1].end)) != NULL) {
chunk_appendf(&trash,
" app1=%p st0=%d st1=%d st2=%d applet=%s\n",
tmpctx,
tmpctx->st0,
tmpctx->st1,
tmpctx->st2,
tmpctx->applet->name);
}
chunk_appendf(&trash,
" req=%p (f=0x%06x an=0x%x pipe=%d tofwd=%d total=%lld)\n"
" an_exp=%s",
&strm->req,
strm->req.flags, strm->req.analysers,
strm->req.pipe ? strm->req.pipe->data : 0,
strm->req.to_forward, strm->req.total,
strm->req.analyse_exp ?
human_time(TICKS_TO_MS(strm->req.analyse_exp - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>");
chunk_appendf(&trash,
" rex=%s",
strm->req.rex ?
human_time(TICKS_TO_MS(strm->req.rex - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>");
chunk_appendf(&trash,
" wex=%s\n"
" buf=%p data=%p o=%d p=%d req.next=%d i=%d size=%d\n",
strm->req.wex ?
human_time(TICKS_TO_MS(strm->req.wex - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>",
strm->req.buf,
strm->req.buf->data, strm->req.buf->o,
(int)(strm->req.buf->p - strm->req.buf->data),
strm->txn ? strm->txn->req.next : 0, strm->req.buf->i,
strm->req.buf->size);
chunk_appendf(&trash,
" res=%p (f=0x%06x an=0x%x pipe=%d tofwd=%d total=%lld)\n"
" an_exp=%s",
&strm->res,
strm->res.flags, strm->res.analysers,
strm->res.pipe ? strm->res.pipe->data : 0,
strm->res.to_forward, strm->res.total,
strm->res.analyse_exp ?
human_time(TICKS_TO_MS(strm->res.analyse_exp - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>");
chunk_appendf(&trash,
" rex=%s",
strm->res.rex ?
human_time(TICKS_TO_MS(strm->res.rex - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>");
chunk_appendf(&trash,
" wex=%s\n"
" buf=%p data=%p o=%d p=%d rsp.next=%d i=%d size=%d\n",
strm->res.wex ?
human_time(TICKS_TO_MS(strm->res.wex - now_ms),
TICKS_TO_MS(1000)) : "<NEVER>",
strm->res.buf,
strm->res.buf->data, strm->res.buf->o,
(int)(strm->res.buf->p - strm->res.buf->data),
strm->txn ? strm->txn->rsp.next : 0, strm->res.buf->i,
strm->res.buf->size);
if (bi_putchk(si_ic(si), &trash) == -1) {
si_applet_cant_put(si);
return 0;
}
/* use other states to dump the contents */
}
/* end of dump */
appctx->ctx.sess.uid = 0;
appctx->ctx.sess.section = 0;
return 1;
}
static int cli_parse_show_sess(char **args, struct appctx *appctx, void *private)
{
if (!cli_has_level(appctx, ACCESS_LVL_OPER))
return 1;
if (*args[2] && strcmp(args[2], "all") == 0)
appctx->ctx.sess.target = (void *)-1;
else if (*args[2])
appctx->ctx.sess.target = (void *)strtoul(args[2], NULL, 0);
else
appctx->ctx.sess.target = NULL;
appctx->ctx.sess.section = 0; /* start with stream status */
appctx->ctx.sess.pos = 0;
return 0;
}
/* This function dumps all streams' states onto the stream interface's
* read buffer. It returns 0 if the output buffer is full and it needs
* to be called again, otherwise non-zero. It is designed to be called
* from stats_dump_sess_to_buffer() below.
*/
static int cli_io_handler_dump_sess(struct appctx *appctx)
{
struct stream_interface *si = appctx->owner;
struct connection *conn;
if (unlikely(si_ic(si)->flags & (CF_WRITE_ERROR|CF_SHUTW))) {
/* If we're forced to shut down, we might have to remove our
* reference to the last stream being dumped.
*/
if (appctx->st2 == STAT_ST_LIST) {
if (!LIST_ISEMPTY(&appctx->ctx.sess.bref.users)) {
LIST_DEL(&appctx->ctx.sess.bref.users);
LIST_INIT(&appctx->ctx.sess.bref.users);
}
}
return 1;
}
chunk_reset(&trash);
switch (appctx->st2) {
case STAT_ST_INIT:
/* the function had not been called yet, let's prepare the
* buffer for a response. We initialize the current stream
* pointer to the first in the global list. When a target
* stream is being destroyed, it is responsible for updating
* this pointer. We know we have reached the end when this
* pointer points back to the head of the streams list.
*/
LIST_INIT(&appctx->ctx.sess.bref.users);
appctx->ctx.sess.bref.ref = streams.n;
appctx->st2 = STAT_ST_LIST;
/* fall through */
case STAT_ST_LIST:
/* first, let's detach the back-ref from a possible previous stream */
if (!LIST_ISEMPTY(&appctx->ctx.sess.bref.users)) {
LIST_DEL(&appctx->ctx.sess.bref.users);
LIST_INIT(&appctx->ctx.sess.bref.users);
}
/* and start from where we stopped */
while (appctx->ctx.sess.bref.ref != &streams) {
char pn[INET6_ADDRSTRLEN];
struct stream *curr_strm;
curr_strm = LIST_ELEM(appctx->ctx.sess.bref.ref, struct stream *, list);
if (appctx->ctx.sess.target) {
if (appctx->ctx.sess.target != (void *)-1 && appctx->ctx.sess.target != curr_strm)
goto next_sess;
LIST_ADDQ(&curr_strm->back_refs, &appctx->ctx.sess.bref.users);
/* call the proper dump() function and return if we're missing space */
if (!stats_dump_full_strm_to_buffer(si, curr_strm))
return 0;
/* stream dump complete */
LIST_DEL(&appctx->ctx.sess.bref.users);
LIST_INIT(&appctx->ctx.sess.bref.users);
if (appctx->ctx.sess.target != (void *)-1) {
appctx->ctx.sess.target = NULL;
break;
}
else
goto next_sess;
}
chunk_appendf(&trash,
"%p: proto=%s",
curr_strm,
strm_li(curr_strm) ? strm_li(curr_strm)->proto->name : "?");
conn = objt_conn(strm_orig(curr_strm));
switch (conn ? addr_to_str(&conn->addr.from, pn, sizeof(pn)) : AF_UNSPEC) {
case AF_INET:
case AF_INET6:
chunk_appendf(&trash,
" src=%s:%d fe=%s be=%s srv=%s",
pn,
get_host_port(&conn->addr.from),
strm_fe(curr_strm)->id,
(curr_strm->be->cap & PR_CAP_BE) ? curr_strm->be->id : "<NONE>",
objt_server(curr_strm->target) ? objt_server(curr_strm->target)->id : "<none>"
);
break;
case AF_UNIX:
chunk_appendf(&trash,
" src=unix:%d fe=%s be=%s srv=%s",
strm_li(curr_strm)->luid,
strm_fe(curr_strm)->id,
(curr_strm->be->cap & PR_CAP_BE) ? curr_strm->be->id : "<NONE>",
objt_server(curr_strm->target) ? objt_server(curr_strm->target)->id : "<none>"
);
break;
}
chunk_appendf(&trash,
" ts=%02x age=%s calls=%d",
curr_strm->task->state,
human_time(now.tv_sec - curr_strm->logs.tv_accept.tv_sec, 1),
curr_strm->task->calls);
chunk_appendf(&trash,
" rq[f=%06xh,i=%d,an=%02xh,rx=%s",
curr_strm->req.flags,
curr_strm->req.buf->i,
curr_strm->req.analysers,
curr_strm->req.rex ?
human_time(TICKS_TO_MS(curr_strm->req.rex - now_ms),
TICKS_TO_MS(1000)) : "");
chunk_appendf(&trash,
",wx=%s",
curr_strm->req.wex ?
human_time(TICKS_TO_MS(curr_strm->req.wex - now_ms),
TICKS_TO_MS(1000)) : "");
chunk_appendf(&trash,
",ax=%s]",
curr_strm->req.analyse_exp ?
human_time(TICKS_TO_MS(curr_strm->req.analyse_exp - now_ms),
TICKS_TO_MS(1000)) : "");
chunk_appendf(&trash,
" rp[f=%06xh,i=%d,an=%02xh,rx=%s",
curr_strm->res.flags,
curr_strm->res.buf->i,
curr_strm->res.analysers,
curr_strm->res.rex ?
human_time(TICKS_TO_MS(curr_strm->res.rex - now_ms),
TICKS_TO_MS(1000)) : "");
chunk_appendf(&trash,
",wx=%s",
curr_strm->res.wex ?
human_time(TICKS_TO_MS(curr_strm->res.wex - now_ms),
TICKS_TO_MS(1000)) : "");
chunk_appendf(&trash,
",ax=%s]",
curr_strm->res.analyse_exp ?
human_time(TICKS_TO_MS(curr_strm->res.analyse_exp - now_ms),
TICKS_TO_MS(1000)) : "");
conn = objt_conn(curr_strm->si[0].end);
chunk_appendf(&trash,
" s0=[%d,%1xh,fd=%d,ex=%s]",
curr_strm->si[0].state,
curr_strm->si[0].flags,
conn ? conn->handle.fd : -1,
curr_strm->si[0].exp ?
human_time(TICKS_TO_MS(curr_strm->si[0].exp - now_ms),
TICKS_TO_MS(1000)) : "");
conn = objt_conn(curr_strm->si[1].end);
chunk_appendf(&trash,
" s1=[%d,%1xh,fd=%d,ex=%s]",
curr_strm->si[1].state,
curr_strm->si[1].flags,
conn ? conn->handle.fd : -1,
curr_strm->si[1].exp ?
human_time(TICKS_TO_MS(curr_strm->si[1].exp - now_ms),
TICKS_TO_MS(1000)) : "");
chunk_appendf(&trash,
" exp=%s",
curr_strm->task->expire ?
human_time(TICKS_TO_MS(curr_strm->task->expire - now_ms),
TICKS_TO_MS(1000)) : "");
if (task_in_rq(curr_strm->task))
chunk_appendf(&trash, " run(nice=%d)", curr_strm->task->nice);
chunk_appendf(&trash, "\n");
if (bi_putchk(si_ic(si), &trash) == -1) {
/* let's try again later from this stream. We add ourselves into
* this stream's users so that it can remove us upon termination.
*/
si_applet_cant_put(si);
LIST_ADDQ(&curr_strm->back_refs, &appctx->ctx.sess.bref.users);
return 0;
}
next_sess:
appctx->ctx.sess.bref.ref = curr_strm->list.n;
}
if (appctx->ctx.sess.target && appctx->ctx.sess.target != (void *)-1) {
/* specified stream not found */
if (appctx->ctx.sess.section > 0)
chunk_appendf(&trash, " *** session terminated while we were watching it ***\n");
else
chunk_appendf(&trash, "Session not found.\n");
if (bi_putchk(si_ic(si), &trash) == -1) {
si_applet_cant_put(si);
return 0;
}
appctx->ctx.sess.target = NULL;
appctx->ctx.sess.uid = 0;
return 1;
}
appctx->st2 = STAT_ST_FIN;
/* fall through */
default:
appctx->st2 = STAT_ST_FIN;
return 1;
}
}
static void cli_release_show_sess(struct appctx *appctx)
{
if (appctx->st2 == STAT_ST_LIST) {
if (!LIST_ISEMPTY(&appctx->ctx.sess.bref.users))
LIST_DEL(&appctx->ctx.sess.bref.users);
}
}
/* Parses the "shutdown session" directive, it always returns 1 */
static int cli_parse_shutdown_session(char **args, struct appctx *appctx, void *private)
{
struct stream *strm, *ptr;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
if (!*args[2]) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "Session pointer expected (use 'show sess').\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
ptr = (void *)strtoul(args[2], NULL, 0);
/* first, look for the requested stream in the stream table */
list_for_each_entry(strm, &streams, list) {
if (strm == ptr)
break;
}
/* do we have the stream ? */
if (strm != ptr) {
appctx->ctx.cli.severity = LOG_ERR;
appctx->ctx.cli.msg = "No such session (use 'show sess').\n";
appctx->st0 = CLI_ST_PRINT;
return 1;
}
stream_shutdown(strm, SF_ERR_KILLED);
return 1;
}
/* Parses the "shutdown session server" directive, it always returns 1 */
static int cli_parse_shutdown_sessions_server(char **args, struct appctx *appctx, void *private)
{
struct server *sv;
struct stream *strm, *strm_bck;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
sv = cli_find_server(appctx, args[3]);
if (!sv)
return 1;
/* kill all the stream that are on this server */
list_for_each_entry_safe(strm, strm_bck, &sv->actconns, by_srv)
if (strm->srv_conn == sv)
stream_shutdown(strm, SF_ERR_KILLED);
return 1;
}
/* register cli keywords */
static struct cli_kw_list cli_kws = {{ },{
{ { "show", "sess", NULL }, "show sess [id] : report the list of current sessions or dump this session", cli_parse_show_sess, cli_io_handler_dump_sess, cli_release_show_sess },
{ { "shutdown", "session", NULL }, "shutdown session : kill a specific session", cli_parse_shutdown_session, NULL, NULL },
{ { "shutdown", "sessions", "server" }, "shutdown sessions server : kill sessions on a server", cli_parse_shutdown_sessions_server, NULL, NULL },
{{},}
}};
/* main configuration keyword registration. */
static struct action_kw_list stream_tcp_keywords = { ILH, {
{ "use-service", stream_parse_use_service },
{ /* END */ }
}};
static struct action_kw_list stream_http_keywords = { ILH, {
{ "use-service", stream_parse_use_service },
{ /* END */ }
}};
__attribute__((constructor))
static void __stream_init(void)
{
tcp_req_cont_keywords_register(&stream_tcp_keywords);
http_req_keywords_register(&stream_http_keywords);
cli_register_kw(&cli_kws);
}
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/