[MAJOR] implemented client-side support for PF_UNIX sockets
A new file, proto_uxst.c, implements support of PF_UNIX sockets
of type SOCK_STREAM. It relies on generic stream_sock_read/write
and uses its own accept primitive which also tries to be generic.
Right now it only implements an echo service in sight of a general
support for start dumping via unix socket. The echo code is more
of a proof of concept than useful code.
diff --git a/src/proto_uxst.c b/src/proto_uxst.c
new file mode 100644
index 0000000..1920376
--- /dev/null
+++ b/src/proto_uxst.c
@@ -0,0 +1,1414 @@
+/*
+ * UNIX SOCK_STREAM protocol layer (uxst)
+ *
+ * Copyright 2000-2007 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 <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <time.h>
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/un.h>
+
+#include <common/compat.h>
+#include <common/config.h>
+#include <common/debug.h>
+#include <common/memory.h>
+#include <common/mini-clist.h>
+#include <common/standard.h>
+#include <common/time.h>
+#include <common/version.h>
+
+#include <types/acl.h>
+#include <types/capture.h>
+#include <types/client.h>
+#include <types/global.h>
+#include <types/polling.h>
+#include <types/proxy.h>
+#include <types/server.h>
+
+#include <proto/acl.h>
+#include <proto/backend.h>
+#include <proto/buffers.h>
+#include <proto/fd.h>
+#include <proto/log.h>
+#include <proto/protocols.h>
+#include <proto/proto_uxst.h>
+#include <proto/queue.h>
+#include <proto/session.h>
+#include <proto/stream_sock.h>
+#include <proto/task.h>
+
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 128
+#endif
+
+/* This function creates a named PF_UNIX stream socket at address <path>. Note
+ * that the path cannot be NULL nor empty.
+ * It returns the assigned file descriptor, or -1 in the event of an error.
+ */
+static int create_uxst_socket(const char *path)
+{
+ char tempname[MAXPATHLEN];
+ char backname[MAXPATHLEN];
+ struct sockaddr_un addr;
+
+ int ret, sock;
+
+ /* 1. create socket names */
+ if (!path[0]) {
+ Alert("Invalid name for a UNIX socket. Aborting.\n");
+ goto err_return;
+ }
+
+ ret = snprintf(tempname, MAXPATHLEN, "%s.%d.tmp", path, pid);
+ if (ret < 0 || ret >= MAXPATHLEN) {
+ Alert("name too long for UNIX socket. Aborting.\n");
+ goto err_return;
+ }
+
+ ret = snprintf(backname, MAXPATHLEN, "%s.%d.bak", path, pid);
+ if (ret < 0 || ret >= MAXPATHLEN) {
+ Alert("name too long for UNIX socket. Aborting.\n");
+ goto err_return;
+ }
+
+ /* 2. clean existing orphaned entries */
+ if (unlink(tempname) < 0 && errno != ENOENT) {
+ Alert("error when trying to unlink previous UNIX socket. Aborting.\n");
+ goto err_return;
+ }
+
+ if (unlink(backname) < 0 && errno != ENOENT) {
+ Alert("error when trying to unlink previous UNIX socket. Aborting.\n");
+ goto err_return;
+ }
+
+ /* 3. backup existing socket */
+ if (link(path, backname) < 0 && errno != ENOENT) {
+ Alert("error when trying to preserve previous UNIX socket. Aborting.\n");
+ goto err_return;
+ }
+
+ /* 4. prepare new socket */
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, tempname, sizeof(addr.sun_path));
+ addr.sun_path[sizeof(addr.sun_path) - 1] = 0;
+
+ sock = socket(PF_UNIX, SOCK_STREAM, 0);
+ if (sock < 0) {
+ Alert("cannot create socket for UNIX listener. Aborting.\n");
+ goto err_unlink_back;
+ }
+
+ if (sock >= global.maxsock) {
+ Alert("socket(): not enough free sockets for UNIX listener. Raise -n argument. Aborting.\n");
+ goto err_unlink_temp;
+ }
+
+ if (fcntl(sock, F_SETFL, O_NONBLOCK) == -1) {
+ Alert("cannot make UNIX socket non-blocking. Aborting.\n");
+ goto err_unlink_temp;
+ }
+
+ if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+ /* note that bind() creates the socket <tempname> on the file system */
+ Alert("cannot bind socket for UNIX listener. Aborting.\n");
+ goto err_unlink_temp;
+ }
+
+ if (listen(sock, 0) < 0) {
+ Alert("cannot listen to socket for UNIX listener. Aborting.\n");
+ goto err_unlink_temp;
+ }
+
+ /* 5. install.
+ * Point of no return: we are ready, we'll switch the sockets. We don't
+ * fear loosing the socket <path> because we have a copy of it in
+ * backname.
+ */
+ if (rename(tempname, path) < 0) {
+ Alert("cannot switch final and temporary sockets for UNIX listener. Aborting.\n");
+ goto err_rename;
+ }
+
+ /* 6. cleanup */
+ unlink(backname); /* no need to keep this one either */
+
+ return sock;
+
+ err_rename:
+ ret = rename(backname, path);
+ if (ret < 0 && errno == ENOENT)
+ unlink(path);
+ err_unlink_temp:
+ unlink(tempname);
+ close(sock);
+ err_unlink_back:
+ unlink(backname);
+ err_return:
+ return -1;
+}
+
+/* Tries to destroy the UNIX stream socket <path>. The socket must not be used
+ * anymore. It practises best effort, and no error is returned.
+ */
+static void destroy_uxst_socket(const char *path)
+{
+ struct sockaddr_un addr;
+ int sock, ret;
+
+ /* We might have been chrooted, so we may not be able to access the
+ * socket. In order to avoid bothering the other end, we connect with a
+ * wrong protocol, namely SOCK_DGRAM. The return code from connect()
+ * is enough to know if the socket is still live or not. If it's live
+ * in mode SOCK_STREAM, we get EPROTOTYPE or anything else but not
+ * ECONNREFUSED. In this case, we do not touch it because it's used
+ * by some other process.
+ */
+ sock = socket(PF_UNIX, SOCK_DGRAM, 0);
+ if (sock < 0)
+ return;
+
+ addr.sun_family = AF_UNIX;
+ strncpy(addr.sun_path, path, sizeof(addr.sun_path));
+ addr.sun_path[sizeof(addr.sun_path)] = 0;
+ ret = connect(sock, (struct sockaddr *)&addr, sizeof(addr));
+ if (ret < 0 && errno == ECONNREFUSED) {
+ /* Connect failed: the socket still exists but is not used
+ * anymore. Let's remove this socket now.
+ */
+ unlink(path);
+ }
+ close(sock);
+}
+
+
+/* This function creates all UNIX sockets bound to the protocol entry <proto>.
+ * It is intended to be used as the protocol's bind_all() function.
+ * The sockets will be registered but not added to any fd_set, in order not to
+ * loose them across the fork(). A call to uxst_enable_listeners() is needed
+ * to complete initialization.
+ *
+ * The return value is composed from ERR_NONE, ERR_RETRYABLE and ERR_FATAL.
+ */
+static int uxst_bind_listeners(struct protocol *proto)
+{
+ struct listener *listener;
+ int err = ERR_NONE;
+ int fd;
+
+ list_for_each_entry(listener, &proto->listeners, proto_list) {
+ if (listener->state != LI_INIT)
+ continue; /* already started */
+
+ fd = create_uxst_socket(((struct sockaddr_un *)&listener->addr)->sun_path);
+ if (fd == -1) {
+ err |= ERR_FATAL;
+ continue;
+ }
+
+ /* the socket is listening */
+ listener->fd = fd;
+ listener->state = LI_LISTEN;
+
+ /* the function for the accept() event */
+ fd_insert(fd);
+ fdtab[fd].cb[DIR_RD].f = listener->accept;
+ fdtab[fd].cb[DIR_WR].f = NULL; /* never called */
+ fdtab[fd].cb[DIR_RD].b = fdtab[fd].cb[DIR_WR].b = NULL;
+ fdtab[fd].owner = (struct task *)listener; /* reference the listener instead of a task */
+ fdtab[fd].state = FD_STLISTEN;
+ fdtab[fd].peeraddr = NULL;
+ fdtab[fd].peerlen = 0;
+ fdtab[fd].listener = NULL;
+ fdtab[fd].ev = 0;
+ }
+
+ return err;
+}
+
+/* This function adds the UNIX sockets file descriptors to the polling lists
+ * for all listeners in the LI_LISTEN state. It is intended to be used as the
+ * protocol's enable_all() primitive, after the fork(). It always returns
+ * ERR_NONE.
+ */
+static int uxst_enable_listeners(struct protocol *proto)
+{
+ struct listener *listener;
+
+ list_for_each_entry(listener, &proto->listeners, proto_list) {
+ if (listener->state == LI_LISTEN) {
+ EV_FD_SET(listener->fd, DIR_RD);
+ listener->state = LI_READY;
+ }
+ }
+ return ERR_NONE;
+}
+
+/* This function stops all listening UNIX sockets bound to the protocol
+ * <proto>. It does not detaches them from the protocol.
+ * It always returns ERR_NONE.
+ */
+static int uxst_unbind_listeners(struct protocol *proto)
+{
+ struct listener *listener;
+
+ list_for_each_entry(listener, &proto->listeners, proto_list) {
+ if (listener->state != LI_INIT) {
+ EV_FD_CLR(listener->fd, DIR_RD);
+ close(listener->fd);
+ listener->state = LI_INIT;
+ destroy_uxst_socket(((struct sockaddr_un *)&listener->addr)->sun_path);
+ }
+ }
+ return ERR_NONE;
+}
+
+/*
+ * This function is called on a read event from a listen socket, corresponding
+ * to an accept. It tries to accept as many connections as possible.
+ * It returns 0. Since we use UNIX sockets on the local system for monitoring
+ * purposes and other related things, we do not need to output as many messages
+ * as with TCP which can fall under attack.
+ */
+int uxst_event_accept(int fd) {
+ struct listener *l = (struct listener *)fdtab[fd].owner;
+ struct session *s;
+ struct task *t;
+ int cfd;
+ int max_accept;
+
+ if (global.nbproc > 1)
+ max_accept = 8; /* let other processes catch some connections too */
+ else
+ max_accept = -1;
+
+ while (max_accept--) {
+ struct sockaddr_storage addr;
+ socklen_t laddr = sizeof(addr);
+
+ if ((cfd = accept(fd, (struct sockaddr *)&addr, &laddr)) == -1) {
+ switch (errno) {
+ case EAGAIN:
+ case EINTR:
+ case ECONNABORTED:
+ return 0; /* nothing more to accept */
+ case ENFILE:
+ /* Process reached system FD limit. Check system tunables. */
+ return 0;
+ case EMFILE:
+ /* Process reached process FD limit. Check 'ulimit-n'. */
+ return 0;
+ case ENOBUFS:
+ case ENOMEM:
+ /* Process reached system memory limit. Check system tunables. */
+ return 0;
+ default:
+ return 0;
+ }
+ }
+
+ if (l->nbconn >= l->maxconn) {
+ /* too many connections, we shoot this one and return.
+ * FIXME: it would be better to simply switch the listener's
+ * state to LI_FULL and disable the FD. We could re-enable
+ * it upon fd_delete(), but this requires all protocols to
+ * be switched.
+ */
+ close(cfd);
+ return 0;
+ }
+
+ if ((s = pool_alloc2(pool2_session)) == NULL) {
+ Alert("out of memory in uxst_event_accept().\n");
+ close(cfd);
+ return 0;
+ }
+
+ if ((t = pool_alloc2(pool2_task)) == NULL) {
+ Alert("out of memory in uxst_event_accept().\n");
+ close(cfd);
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+
+ s->cli_addr = addr;
+
+ /* FIXME: should be checked earlier */
+ if (cfd >= global.maxsock) {
+ Alert("accept(): not enough free sockets. Raise -n argument. Giving up.\n");
+ close(cfd);
+ pool_free2(pool2_task, t);
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+
+ if (fcntl(cfd, F_SETFL, O_NONBLOCK) == -1) {
+ Alert("accept(): cannot set the socket in non blocking mode. Giving up\n");
+ close(cfd);
+ pool_free2(pool2_task, t);
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+
+ t->wq = NULL;
+ t->qlist.p = NULL;
+ t->state = TASK_IDLE;
+ t->process = l->handler;
+ t->context = s;
+
+ s->task = t;
+ s->fe = NULL;
+ s->be = NULL;
+
+ s->cli_state = CL_STDATA;
+ s->srv_state = SV_STIDLE;
+ s->req = s->rep = NULL; /* will be allocated later */
+
+ s->cli_fd = cfd;
+ s->srv_fd = -1;
+ s->srv = NULL;
+ s->pend_pos = NULL;
+
+ memset(&s->logs, 0, sizeof(s->logs));
+ memset(&s->txn, 0, sizeof(s->txn));
+
+ s->data_source = DATA_SRC_NONE;
+ s->uniq_id = totalconn;
+
+ if ((s->req = pool_alloc2(pool2_buffer)) == NULL) { /* no memory */
+ close(cfd); /* nothing can be done for this fd without memory */
+ pool_free2(pool2_task, t);
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+
+ if ((s->rep = pool_alloc2(pool2_buffer)) == NULL) { /* no memory */
+ pool_free2(pool2_buffer, s->req);
+ close(cfd); /* nothing can be done for this fd without memory */
+ pool_free2(pool2_task, t);
+ pool_free2(pool2_session, s);
+ return 0;
+ }
+
+ buffer_init(s->req);
+ buffer_init(s->rep);
+ s->req->rlim += BUFSIZE;
+ s->rep->rlim += BUFSIZE;
+
+ fd_insert(cfd);
+ fdtab[cfd].owner = t;
+ fdtab[cfd].listener = l;
+ fdtab[cfd].state = FD_STREADY;
+ fdtab[cfd].cb[DIR_RD].f = l->proto->read;
+ fdtab[cfd].cb[DIR_RD].b = s->req;
+ fdtab[cfd].cb[DIR_WR].f = l->proto->write;
+ fdtab[cfd].cb[DIR_WR].b = s->rep;
+ fdtab[cfd].peeraddr = (struct sockaddr *)&s->cli_addr;
+ fdtab[cfd].peerlen = sizeof(s->cli_addr);
+ fdtab[cfd].ev = 0;
+
+
+ tv_eternity(&s->req->rex);
+ tv_eternity(&s->req->wex);
+ tv_eternity(&s->req->cex);
+ tv_eternity(&s->rep->rex);
+ tv_eternity(&s->rep->wex);
+
+ tv_eternity(&s->req->wto);
+ tv_eternity(&s->req->cto);
+ tv_eternity(&s->req->rto);
+ tv_eternity(&s->rep->rto);
+ tv_eternity(&s->rep->cto);
+ tv_eternity(&s->rep->wto);
+
+ if (l->timeout)
+ s->req->rto = *l->timeout;
+
+ if (l->timeout)
+ s->rep->wto = *l->timeout;
+
+ tv_eternity(&t->expire);
+ if (l->timeout && tv_isset(l->timeout)) {
+ EV_FD_SET(cfd, DIR_RD);
+ tv_add(&s->req->rex, &now, &s->req->rto);
+ tv_add(&s->rep->wex, &now, &s->rep->wto);
+ t->expire = s->req->rex;
+ }
+
+ task_queue(t);
+ task_wakeup(t);
+
+ l->nbconn++; /* warning! right now, it's up to the handler to decrease this */
+ if (l->nbconn >= l->maxconn) {
+ EV_FD_CLR(l->fd, DIR_RD);
+ l->state = LI_FULL;
+ }
+ actconn++;
+ totalconn++;
+
+ //fprintf(stderr, "accepting from %p => %d conn, %d total, task=%p, cfd=%d, maxfd=%d\n", p, actconn, totalconn, t, cfd, maxfd);
+ } /* end of while (p->feconn < p->maxconn) */
+ //fprintf(stderr,"fct %s:%d\n", __FUNCTION__, __LINE__);
+ return 0;
+}
+
+/*
+ * manages the client FSM and its socket. It returns 1 if a state has changed
+ * (and a resync may be needed), otherwise 0.
+ */
+static int process_uxst_cli(struct session *t)
+{
+ int s = t->srv_state;
+ int c = t->cli_state;
+ struct buffer *req = t->req;
+ struct buffer *rep = t->rep;
+ //fprintf(stderr,"fct %s:%d\n", __FUNCTION__, __LINE__);
+ if (c == CL_STDATA) {
+ /* FIXME: this error handling is partly buggy because we always report
+ * a 'DATA' phase while we don't know if the server was in IDLE, CONN
+ * or HEADER phase. BTW, it's not logical to expire the client while
+ * we're waiting for the server to connect.
+ */
+ /* read or write error */
+ if (rep->flags & BF_WRITE_ERROR || req->flags & BF_READ_ERROR) {
+ buffer_shutr(req);
+ buffer_shutw(rep);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLICL;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+ /* last read, or end of server write */
+ else if (req->flags & BF_READ_NULL || s == SV_STSHUTW || s == SV_STCLOSE) {
+ EV_FD_CLR(t->cli_fd, DIR_RD);
+ buffer_shutr(req);
+ t->cli_state = CL_STSHUTR;
+ return 1;
+ }
+ /* last server read and buffer empty */
+ else if ((s == SV_STSHUTR || s == SV_STCLOSE) && (rep->l == 0)) {
+ EV_FD_CLR(t->cli_fd, DIR_WR);
+ buffer_shutw(rep);
+ shutdown(t->cli_fd, SHUT_WR);
+ /* We must ensure that the read part is still alive when switching
+ * to shutw */
+ EV_FD_SET(t->cli_fd, DIR_RD);
+ tv_add_ifset(&req->rex, &now, &req->rto);
+ t->cli_state = CL_STSHUTW;
+ //fprintf(stderr,"%p:%s(%d), c=%d, s=%d\n", t, __FUNCTION__, __LINE__, t->cli_state, t->cli_state);
+ return 1;
+ }
+ /* read timeout */
+ else if (tv_isle(&req->rex, &now)) {
+ EV_FD_CLR(t->cli_fd, DIR_RD);
+ buffer_shutr(req);
+ t->cli_state = CL_STSHUTR;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLITO;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+ /* write timeout */
+ else if (tv_isle(&rep->wex, &now)) {
+ EV_FD_CLR(t->cli_fd, DIR_WR);
+ buffer_shutw(rep);
+ shutdown(t->cli_fd, SHUT_WR);
+ /* We must ensure that the read part is still alive when switching
+ * to shutw */
+ EV_FD_SET(t->cli_fd, DIR_RD);
+ tv_add_ifset(&req->rex, &now, &req->rto);
+
+ t->cli_state = CL_STSHUTW;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLITO;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+
+ if (req->l >= req->rlim - req->data) {
+ /* no room to read more data */
+ if (EV_FD_COND_C(t->cli_fd, DIR_RD)) {
+ /* stop reading until we get some space */
+ tv_eternity(&req->rex);
+ }
+ } else {
+ /* there's still some space in the buffer */
+ if (EV_FD_COND_S(t->cli_fd, DIR_RD)) {
+ if (!tv_isset(&req->rto) ||
+ (t->srv_state < SV_STDATA && tv_isset(&req->wto)))
+ /* If the client has no timeout, or if the server not ready yet, and we
+ * know for sure that it can expire, then it's cleaner to disable the
+ * timeout on the client side so that too low values cannot make the
+ * sessions abort too early.
+ */
+ tv_eternity(&req->rex);
+ else
+ tv_add(&req->rex, &now, &req->rto);
+ }
+ }
+
+ if ((rep->l == 0) ||
+ ((s < SV_STDATA) /* FIXME: this may be optimized && (rep->w == rep->h)*/)) {
+ if (EV_FD_COND_C(t->cli_fd, DIR_WR)) {
+ /* stop writing */
+ tv_eternity(&rep->wex);
+ }
+ } else {
+ /* buffer not empty */
+ if (EV_FD_COND_S(t->cli_fd, DIR_WR)) {
+ /* restart writing */
+ if (tv_add_ifset(&rep->wex, &now, &rep->wto)) {
+ /* FIXME: to prevent the client from expiring read timeouts during writes,
+ * we refresh it. */
+ req->rex = rep->wex;
+ }
+ else
+ tv_eternity(&rep->wex);
+ }
+ }
+ return 0; /* other cases change nothing */
+ }
+ else if (c == CL_STSHUTR) {
+ if (rep->flags & BF_WRITE_ERROR) {
+ buffer_shutw(rep);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLICL;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+ else if ((s == SV_STSHUTR || s == SV_STCLOSE) && (rep->l == 0)) {
+ buffer_shutw(rep);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ return 1;
+ }
+ else if (tv_isle(&rep->wex, &now)) {
+ buffer_shutw(rep);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLITO;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+
+ if (rep->l == 0) {
+ if (EV_FD_COND_C(t->cli_fd, DIR_WR)) {
+ /* stop writing */
+ tv_eternity(&rep->wex);
+ }
+ } else {
+ /* buffer not empty */
+ if (EV_FD_COND_S(t->cli_fd, DIR_WR)) {
+ /* restart writing */
+ if (!tv_add_ifset(&rep->wex, &now, &rep->wto))
+ tv_eternity(&rep->wex);
+ }
+ }
+ return 0;
+ }
+ else if (c == CL_STSHUTW) {
+ if (req->flags & BF_READ_ERROR) {
+ buffer_shutr(req);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLICL;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+ else if (req->flags & BF_READ_NULL || s == SV_STSHUTW || s == SV_STCLOSE) {
+ buffer_shutr(req);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ return 1;
+ }
+ else if (tv_isle(&req->rex, &now)) {
+ buffer_shutr(req);
+ fd_delete(t->cli_fd);
+ t->cli_state = CL_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_CLITO;
+ if (!(t->flags & SN_FINST_MASK)) {
+ if (t->pend_pos)
+ t->flags |= SN_FINST_Q;
+ else if (s == SV_STCONN)
+ t->flags |= SN_FINST_C;
+ else
+ t->flags |= SN_FINST_D;
+ }
+ return 1;
+ }
+ else if (req->l >= req->rlim - req->data) {
+ /* no room to read more data */
+
+ /* FIXME-20050705: is it possible for a client to maintain a session
+ * after the timeout by sending more data after it receives a close ?
+ */
+
+ if (EV_FD_COND_C(t->cli_fd, DIR_RD)) {
+ /* stop reading until we get some space */
+ tv_eternity(&req->rex);
+ //fprintf(stderr,"%p:%s(%d), c=%d, s=%d\n", t, __FUNCTION__, __LINE__, t->cli_state, t->cli_state);
+ }
+ } else {
+ /* there's still some space in the buffer */
+ if (EV_FD_COND_S(t->cli_fd, DIR_RD)) {
+ if (!tv_add_ifset(&req->rex, &now, &req->rto))
+ tv_eternity(&req->rex);
+ //fprintf(stderr,"%p:%s(%d), c=%d, s=%d\n", t, __FUNCTION__, __LINE__, t->cli_state, t->cli_state);
+ }
+ }
+ return 0;
+ }
+ else { /* CL_STCLOSE: nothing to do */
+ if ((global.mode & MODE_DEBUG) && (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE))) {
+ int len;
+ len = sprintf(trash, "%08x:%s.clicls[%04x:%04x]\n", t->uniq_id, t->be?t->be->id:"",
+ (unsigned short)t->cli_fd, (unsigned short)t->srv_fd);
+ write(1, trash, len);
+ }
+ return 0;
+ }
+ return 0;
+}
+
+#if 0
+ /* FIXME! This part has not been completely converted yet, and it may
+ * still be very specific to TCPv4 ! Also, it relies on some parameters
+ * such as conn_retries which are not set upon accept().
+ */
+/*
+ * Manages the server FSM and its socket. It returns 1 if a state has changed
+ * (and a resync may be needed), otherwise 0.
+ */
+static int process_uxst_srv(struct session *t)
+{
+ int s = t->srv_state;
+ int c = t->cli_state;
+ struct buffer *req = t->req;
+ struct buffer *rep = t->rep;
+ int conn_err;
+
+ if (s == SV_STIDLE) {
+ if (c == CL_STCLOSE || c == CL_STSHUTW ||
+ (c == CL_STSHUTR &&
+ (t->req->l == 0 || t->be->options & PR_O_ABRT_CLOSE))) { /* give up */
+ tv_eternity(&req->cex);
+ if (t->pend_pos)
+ t->logs.t_queue = tv_ms_elapsed(&t->logs.tv_accept, &now);
+ srv_close_with_err(t, SN_ERR_CLICL, t->pend_pos ? SN_FINST_Q : SN_FINST_C);
+ return 1;
+ }
+ else {
+ /* FIXME: reimplement the TARPIT check here */
+
+ /* Right now, we will need to create a connection to the server.
+ * We might already have tried, and got a connection pending, in
+ * which case we will not do anything till it's pending. It's up
+ * to any other session to release it and wake us up again.
+ */
+ if (t->pend_pos) {
+ if (!tv_isle(&req->cex, &now))
+ return 0;
+ else {
+ /* we've been waiting too long here */
+ tv_eternity(&req->cex);
+ t->logs.t_queue = tv_ms_elapsed(&t->logs.tv_accept, &now);
+ srv_close_with_err(t, SN_ERR_SRVTO, SN_FINST_Q);
+ if (t->srv)
+ t->srv->failed_conns++;
+ if (t->fe)
+ t->fe->failed_conns++;
+ return 1;
+ }
+ }
+
+ do {
+ /* first, get a connection */
+ if (srv_redispatch_connect(t))
+ return t->srv_state != SV_STIDLE;
+
+ /* try to (re-)connect to the server, and fail if we expire the
+ * number of retries.
+ */
+ if (srv_retryable_connect(t)) {
+ t->logs.t_queue = tv_ms_elapsed(&t->logs.tv_accept, &now);
+ return t->srv_state != SV_STIDLE;
+ }
+ } while (1);
+ }
+ }
+ else if (s == SV_STCONN) { /* connection in progress */
+ if (c == CL_STCLOSE || c == CL_STSHUTW ||
+ (c == CL_STSHUTR &&
+ ((t->req->l == 0 && !(req->flags & BF_WRITE_STATUS)) ||
+ t->be->options & PR_O_ABRT_CLOSE))) { /* give up */
+ tv_eternity(&req->cex);
+ fd_delete(t->srv_fd);
+ if (t->srv)
+ t->srv->cur_sess--;
+
+ srv_close_with_err(t, SN_ERR_CLICL, SN_FINST_C);
+ return 1;
+ }
+ if (!(req->flags & BF_WRITE_STATUS) && !tv_isle(&req->cex, &now)) {
+ //fprintf(stderr,"1: c=%d, s=%d, now=%d.%06d, exp=%d.%06d\n", c, s, now.tv_sec, now.tv_usec, req->cex.tv_sec, req->cex.tv_usec);
+ return 0; /* nothing changed */
+ }
+ else if (!(req->flags & BF_WRITE_STATUS) || (req->flags & BF_WRITE_ERROR)) {
+ /* timeout, asynchronous connect error or first write error */
+ //fprintf(stderr,"2: c=%d, s=%d\n", c, s);
+
+ fd_delete(t->srv_fd);
+ if (t->srv)
+ t->srv->cur_sess--;
+
+ if (!(req->flags & BF_WRITE_STATUS))
+ conn_err = SN_ERR_SRVTO; // it was a connect timeout.
+ else
+ conn_err = SN_ERR_SRVCL; // it was an asynchronous connect error.
+
+ /* ensure that we have enough retries left */
+ if (srv_count_retry_down(t, conn_err))
+ return 1;
+
+ if (t->srv && t->conn_retries == 0 && t->be->options & PR_O_REDISP) {
+ /* We're on our last chance, and the REDISP option was specified.
+ * We will ignore cookie and force to balance or use the dispatcher.
+ */
+ /* let's try to offer this slot to anybody */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ if (t->srv)
+ t->srv->failed_conns++;
+ t->be->failed_conns++;
+
+ t->flags &= ~(SN_DIRECT | SN_ASSIGNED | SN_ADDR_SET);
+ t->srv = NULL; /* it's left to the dispatcher to choose a server */
+
+ /* first, get a connection */
+ if (srv_redispatch_connect(t))
+ return t->srv_state != SV_STIDLE;
+ }
+
+ do {
+ /* Now we will try to either reconnect to the same server or
+ * connect to another server. If the connection gets queued
+ * because all servers are saturated, then we will go back to
+ * the SV_STIDLE state.
+ */
+ if (srv_retryable_connect(t)) {
+ t->logs.t_queue = tv_ms_elapsed(&t->logs.tv_accept, &now);
+ return t->srv_state != SV_STCONN;
+ }
+
+ /* we need to redispatch the connection to another server */
+ if (srv_redispatch_connect(t))
+ return t->srv_state != SV_STCONN;
+ } while (1);
+ }
+ else { /* no error or write 0 */
+ t->logs.t_connect = tv_ms_elapsed(&t->logs.tv_accept, &now);
+
+ //fprintf(stderr,"3: c=%d, s=%d\n", c, s);
+ if (req->l == 0) /* nothing to write */ {
+ EV_FD_CLR(t->srv_fd, DIR_WR);
+ tv_eternity(&req->wex);
+ } else /* need the right to write */ {
+ EV_FD_SET(t->srv_fd, DIR_WR);
+ if (tv_add_ifset(&req->wex, &now, &req->wto)) {
+ /* FIXME: to prevent the server from expiring read timeouts during writes,
+ * we refresh it. */
+ rep->rex = req->wex;
+ }
+ else
+ tv_eternity(&req->wex);
+ }
+
+ EV_FD_SET(t->srv_fd, DIR_RD);
+ if (!tv_add_ifset(&rep->rex, &now, &rep->rto))
+ tv_eternity(&rep->rex);
+
+ t->srv_state = SV_STDATA;
+ if (t->srv)
+ t->srv->cum_sess++;
+ rep->rlim = rep->data + BUFSIZE; /* no rewrite needed */
+
+ /* if the user wants to log as soon as possible, without counting
+ bytes from the server, then this is the right moment. */
+ if (t->fe && t->fe->to_log && !(t->logs.logwait & LW_BYTES)) {
+ t->logs.t_close = t->logs.t_connect; /* to get a valid end date */
+ //uxst_sess_log(t);
+ }
+ tv_eternity(&req->cex);
+ return 1;
+ }
+ }
+ else if (s == SV_STDATA) {
+ /* read or write error */
+ if (req->flags & BF_WRITE_ERROR || rep->flags & BF_READ_ERROR) {
+ buffer_shutr(rep);
+ buffer_shutw(req);
+ fd_delete(t->srv_fd);
+ if (t->srv) {
+ t->srv->cur_sess--;
+ t->srv->failed_resp++;
+ }
+ t->be->failed_resp++;
+ t->srv_state = SV_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVCL;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ /* last read, or end of client write */
+ else if (rep->flags & BF_READ_NULL || c == CL_STSHUTW || c == CL_STCLOSE) {
+ EV_FD_CLR(t->srv_fd, DIR_RD);
+ buffer_shutr(rep);
+ t->srv_state = SV_STSHUTR;
+ //fprintf(stderr,"%p:%s(%d), c=%d, s=%d\n", t, __FUNCTION__, __LINE__, t->cli_state, t->cli_state);
+ return 1;
+ }
+ /* end of client read and no more data to send */
+ else if ((c == CL_STSHUTR || c == CL_STCLOSE) && (req->l == 0)) {
+ EV_FD_CLR(t->srv_fd, DIR_WR);
+ buffer_shutw(req);
+ shutdown(t->srv_fd, SHUT_WR);
+ /* We must ensure that the read part is still alive when switching
+ * to shutw */
+ EV_FD_SET(t->srv_fd, DIR_RD);
+ tv_add_ifset(&rep->rex, &now, &rep->rto);
+
+ t->srv_state = SV_STSHUTW;
+ return 1;
+ }
+ /* read timeout */
+ else if (tv_isle(&rep->rex, &now)) {
+ EV_FD_CLR(t->srv_fd, DIR_RD);
+ buffer_shutr(rep);
+ t->srv_state = SV_STSHUTR;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVTO;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ return 1;
+ }
+ /* write timeout */
+ else if (tv_isle(&req->wex, &now)) {
+ EV_FD_CLR(t->srv_fd, DIR_WR);
+ buffer_shutw(req);
+ shutdown(t->srv_fd, SHUT_WR);
+ /* We must ensure that the read part is still alive when switching
+ * to shutw */
+ EV_FD_SET(t->srv_fd, DIR_RD);
+ tv_add_ifset(&rep->rex, &now, &rep->rto);
+ t->srv_state = SV_STSHUTW;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVTO;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ return 1;
+ }
+
+ /* recompute request time-outs */
+ if (req->l == 0) {
+ if (EV_FD_COND_C(t->srv_fd, DIR_WR)) {
+ /* stop writing */
+ tv_eternity(&req->wex);
+ }
+ }
+ else { /* buffer not empty, there are still data to be transferred */
+ if (EV_FD_COND_S(t->srv_fd, DIR_WR)) {
+ /* restart writing */
+ if (tv_add_ifset(&req->wex, &now, &req->wto)) {
+ /* FIXME: to prevent the server from expiring read timeouts during writes,
+ * we refresh it. */
+ rep->rex = req->wex;
+ }
+ else
+ tv_eternity(&req->wex);
+ }
+ }
+
+ /* recompute response time-outs */
+ if (rep->l == BUFSIZE) { /* no room to read more data */
+ if (EV_FD_COND_C(t->srv_fd, DIR_RD)) {
+ tv_eternity(&rep->rex);
+ }
+ }
+ else {
+ if (EV_FD_COND_S(t->srv_fd, DIR_RD)) {
+ if (!tv_add_ifset(&rep->rex, &now, &rep->rto))
+ tv_eternity(&rep->rex);
+ }
+ }
+
+ return 0; /* other cases change nothing */
+ }
+ else if (s == SV_STSHUTR) {
+ if (req->flags & BF_WRITE_ERROR) {
+ //EV_FD_CLR(t->srv_fd, DIR_WR);
+ buffer_shutw(req);
+ fd_delete(t->srv_fd);
+ if (t->srv) {
+ t->srv->cur_sess--;
+ t->srv->failed_resp++;
+ }
+ t->be->failed_resp++;
+ //close(t->srv_fd);
+ t->srv_state = SV_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVCL;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ else if ((c == CL_STSHUTR || c == CL_STCLOSE) && (req->l == 0)) {
+ //EV_FD_CLR(t->srv_fd, DIR_WR);
+ buffer_shutw(req);
+ fd_delete(t->srv_fd);
+ if (t->srv)
+ t->srv->cur_sess--;
+ //close(t->srv_fd);
+ t->srv_state = SV_STCLOSE;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ else if (tv_isle(&req->wex, &now)) {
+ //EV_FD_CLR(t->srv_fd, DIR_WR);
+ buffer_shutw(req);
+ fd_delete(t->srv_fd);
+ if (t->srv)
+ t->srv->cur_sess--;
+ //close(t->srv_fd);
+ t->srv_state = SV_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVTO;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ else if (req->l == 0) {
+ if (EV_FD_COND_C(t->srv_fd, DIR_WR)) {
+ /* stop writing */
+ tv_eternity(&req->wex);
+ }
+ }
+ else { /* buffer not empty */
+ if (EV_FD_COND_S(t->srv_fd, DIR_WR)) {
+ /* restart writing */
+ if (!tv_add_ifset(&req->wex, &now, &req->wto))
+ tv_eternity(&req->wex);
+ }
+ }
+ return 0;
+ }
+ else if (s == SV_STSHUTW) {
+ if (rep->flags & BF_READ_ERROR) {
+ //EV_FD_CLR(t->srv_fd, DIR_RD);
+ buffer_shutr(rep);
+ fd_delete(t->srv_fd);
+ if (t->srv) {
+ t->srv->cur_sess--;
+ t->srv->failed_resp++;
+ }
+ t->be->failed_resp++;
+ //close(t->srv_fd);
+ t->srv_state = SV_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVCL;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ else if (rep->flags & BF_READ_NULL || c == CL_STSHUTW || c == CL_STCLOSE) {
+ //EV_FD_CLR(t->srv_fd, DIR_RD);
+ buffer_shutr(rep);
+ fd_delete(t->srv_fd);
+ if (t->srv)
+ t->srv->cur_sess--;
+ //close(t->srv_fd);
+ t->srv_state = SV_STCLOSE;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ else if (tv_isle(&rep->rex, &now)) {
+ //EV_FD_CLR(t->srv_fd, DIR_RD);
+ buffer_shutr(rep);
+ fd_delete(t->srv_fd);
+ if (t->srv)
+ t->srv->cur_sess--;
+ //close(t->srv_fd);
+ t->srv_state = SV_STCLOSE;
+ if (!(t->flags & SN_ERR_MASK))
+ t->flags |= SN_ERR_SRVTO;
+ if (!(t->flags & SN_FINST_MASK))
+ t->flags |= SN_FINST_D;
+ /* We used to have a free connection slot. Since we'll never use it,
+ * we have to inform the server that it may be used by another session.
+ */
+ if (may_dequeue_tasks(t->srv, t->be))
+ task_wakeup(t->srv->queue_mgt);
+
+ return 1;
+ }
+ else if (rep->l == BUFSIZE) { /* no room to read more data */
+ if (EV_FD_COND_C(t->srv_fd, DIR_RD)) {
+ tv_eternity(&rep->rex);
+ }
+ }
+ else {
+ if (EV_FD_COND_S(t->srv_fd, DIR_RD)) {
+ if (!tv_add_ifset(&rep->rex, &now, &rep->rto))
+ tv_eternity(&rep->rex);
+ }
+ }
+ return 0;
+ }
+ else { /* SV_STCLOSE : nothing to do */
+ if ((global.mode & MODE_DEBUG) && (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE))) {
+ int len;
+ len = sprintf(trash, "%08x:%s.srvcls[%04x:%04x]\n",
+ t->uniq_id, t->be->id, (unsigned short)t->cli_fd, (unsigned short)t->srv_fd);
+ write(1, trash, len);
+ }
+ return 0;
+ }
+ return 0;
+}
+
+/* Processes the client and server jobs of a session task, then
+ * puts it back to the wait queue in a clean state, or
+ * cleans up its resources if it must be deleted. Returns
+ * the time the task accepts to wait, or TIME_ETERNITY for
+ * infinity.
+ */
+void process_uxst_session(struct task *t, struct timeval *next)
+{
+ struct session *s = t->context;
+ int fsm_resync = 0;
+
+ do {
+ fsm_resync = 0;
+ fsm_resync |= process_uxst_cli(s);
+ if (s->srv_state == SV_STIDLE) {
+ if (s->cli_state == CL_STCLOSE || s->cli_state == CL_STSHUTW) {
+ s->srv_state = SV_STCLOSE;
+ fsm_resync |= 1;
+ continue;
+ }
+ if (s->cli_state == CL_STSHUTR ||
+ (s->req->l >= s->req->rlim - s->req->data)) {
+ if (s->req->l == 0) {
+ s->srv_state = SV_STCLOSE;
+ fsm_resync |= 1;
+ continue;
+ }
+ /* OK we have some remaining data to process */
+ /* Just as an exercice, we copy the req into the resp,
+ * and flush the req.
+ */
+ memcpy(s->rep->data, s->req->data, sizeof(s->rep->data));
+ s->rep->l = s->req->l;
+ s->rep->rlim = s->rep->data + BUFSIZE;
+ s->rep->w = s->rep->data;
+ s->rep->lr = s->rep->r = s->rep->data + s->rep->l;
+
+ s->req->l = 0;
+ s->srv_state = SV_STCLOSE;
+
+ fsm_resync |= 1;
+ continue;
+ }
+ }
+ } while (fsm_resync);
+
+ if (likely(s->cli_state != CL_STCLOSE || s->srv_state != SV_STCLOSE)) {
+ s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE;
+ s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE;
+
+ t->expire = s->req->rex;
+ tv_min(&t->expire, &s->req->rex, &s->req->wex);
+ tv_bound(&t->expire, &s->req->cex);
+ tv_bound(&t->expire, &s->rep->rex);
+ tv_bound(&t->expire, &s->rep->wex);
+
+ /* restore t to its place in the task list */
+ task_queue(t);
+
+ *next = t->expire;
+ return; /* nothing more to do */
+ }
+
+ if (s->fe)
+ s->fe->feconn--;
+ if (s->be && (s->flags & SN_BE_ASSIGNED))
+ s->be->beconn--;
+ actconn--;
+
+ if (unlikely((global.mode & MODE_DEBUG) &&
+ (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)))) {
+ int len;
+ len = sprintf(trash, "%08x:%s.closed[%04x:%04x]\n",
+ s->uniq_id, s->be->id,
+ (unsigned short)s->cli_fd, (unsigned short)s->srv_fd);
+ write(1, trash, len);
+ }
+
+ s->logs.t_close = tv_ms_elapsed(&s->logs.tv_accept, &now);
+ if (s->req != NULL)
+ s->logs.bytes_in = s->req->total;
+ if (s->rep != NULL)
+ s->logs.bytes_out = s->rep->total;
+
+ if (s->fe) {
+ s->fe->bytes_in += s->logs.bytes_in;
+ s->fe->bytes_out += s->logs.bytes_out;
+ }
+ if (s->be && (s->be != s->fe)) {
+ s->be->bytes_in += s->logs.bytes_in;
+ s->be->bytes_out += s->logs.bytes_out;
+ }
+ if (s->srv) {
+ s->srv->bytes_in += s->logs.bytes_in;
+ s->srv->bytes_out += s->logs.bytes_out;
+ }
+
+ /* let's do a final log if we need it */
+ if (s->logs.logwait &&
+ !(s->flags & SN_MONITOR) &&
+ (s->req->total || !(s->fe && s->fe->options & PR_O_NULLNOLOG))) {
+ //uxst_sess_log(s);
+ }
+
+ /* the task MUST not be in the run queue anymore */
+ task_delete(t);
+ session_free(s);
+ task_free(t);
+ tv_eternity(next);
+}
+#endif /* not converted */
+
+
+/* Processes data exchanges on the statistics socket. The client processing
+ * is called and the task is put back in the wait queue or it is cleared.
+ * In order to ease the transition, we simply simulate the server status
+ * for now. It only knows states SV_STIDLE and SV_STCLOSE. Returns in <next>
+ * the task's expiration date.
+ */
+void process_uxst_stats(struct task *t, struct timeval *next)
+{
+ struct session *s = t->context;
+ struct listener *listener;
+ int fsm_resync = 0;
+
+ do {
+ //fprintf(stderr,"fct %s:%d\n", __FUNCTION__, __LINE__);
+ fsm_resync = 0;
+ fsm_resync |= process_uxst_cli(s);
+ if (s->srv_state == SV_STIDLE) {
+ if (s->cli_state == CL_STCLOSE || s->cli_state == CL_STSHUTW) {
+ s->srv_state = SV_STCLOSE;
+ fsm_resync |= 1;
+ continue;
+ }
+ else if (s->cli_state == CL_STSHUTR ||
+ (s->req->l >= s->req->rlim - s->req->data)) {
+ if (s->req->l == 0) {
+ s->srv_state = SV_STCLOSE;
+ fsm_resync |= 1;
+ continue;
+ }
+ /* OK we have some remaining data to process. Just for the
+ * sake of an exercice, we copy the req into the resp,
+ * and flush the req. This produces a simple echo function.
+ */
+ memcpy(s->rep->data, s->req->data, sizeof(s->rep->data));
+ s->rep->l = s->req->l;
+ s->rep->rlim = s->rep->data + BUFSIZE;
+ s->rep->w = s->rep->data;
+ s->rep->lr = s->rep->r = s->rep->data + s->rep->l;
+
+ s->req->l = 0;
+ s->srv_state = SV_STCLOSE;
+
+ fsm_resync |= 1;
+ continue;
+ }
+ }
+ } while (fsm_resync);
+
+ if (likely(s->cli_state != CL_STCLOSE || s->srv_state != SV_STCLOSE)) {
+ s->req->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE;
+ s->rep->flags &= BF_CLEAR_READ & BF_CLEAR_WRITE;
+
+ t->expire = s->req->rex;
+ tv_min(&t->expire, &s->req->rex, &s->req->wex);
+ tv_bound(&t->expire, &s->req->cex);
+ tv_bound(&t->expire, &s->rep->rex);
+ tv_bound(&t->expire, &s->rep->wex);
+
+ /* restore t to its place in the task list */
+ task_queue(t);
+
+ *next = t->expire;
+ return; /* nothing more to do */
+ }
+
+ actconn--;
+ listener = fdtab[s->cli_fd].listener;
+ if (listener) {
+ listener->nbconn--;
+ if (listener->state == LI_FULL &&
+ listener->nbconn < listener->maxconn) {
+ /* we should reactivate the listener */
+ EV_FD_SET(listener->fd, DIR_RD);
+ listener->state = LI_READY;
+ }
+ }
+
+ /* the task MUST not be in the run queue anymore */
+ task_delete(t);
+ session_free(s);
+ task_free(t);
+ tv_eternity(next);
+}
+
+/* Note: must not be declared <const> as its list will be overwritten */
+static struct protocol proto_unix = {
+ .name = "unix_stream",
+ .sock_domain = PF_UNIX,
+ .sock_type = SOCK_STREAM,
+ .sock_prot = 0,
+ .sock_family = AF_UNIX,
+ .read = &stream_sock_read,
+ .write = &stream_sock_write,
+ .bind_all = uxst_bind_listeners,
+ .unbind_all = uxst_unbind_listeners,
+ .enable_all = uxst_enable_listeners,
+ .listeners = LIST_HEAD_INIT(proto_unix.listeners),
+ .nb_listeners = 0,
+};
+
+/* Adds listener to the list of unix stream listeners */
+void uxst_add_listener(struct listener *listener)
+{
+ listener->proto = &proto_unix;
+ LIST_ADDQ(&proto_unix.listeners, &listener->proto_list);
+ proto_unix.nb_listeners++;
+}
+
+__attribute__((constructor))
+static void __uxst_protocol_init(void)
+{
+ protocol_register(&proto_unix);
+ //tv_eternity(&global.unix_fe.clitimeout);
+}
+
+
+/*
+ * Local variables:
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * End:
+ */