384 lines
10 KiB
C
384 lines
10 KiB
C
/*-
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* Copyright (c) 2005 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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/*
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* This regression test is intended to validate that the backlog parameter
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* set by listen() is properly set, can be retrieved using SO_LISTENQLIMIT,
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* and that it can be updated by later calls to listen(). We also check that
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* SO_LISTENQLIMIT cannot be set.
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*
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* Future things to test:
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*
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* - That if we change the value of kern.ipc.soacceptqueue, the limits really
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* do change.
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*
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* - That limits are, approximately, enforced and implemented.
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*
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* - All this on multiple socket types -- i.e., PF_LOCAL.
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*
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* - That we also test SO_LISTENQLEN and SO_LISTENINCQLEN.
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*/
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/*
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* We retrieve kern.ipc.soacceptqueue before running the tests in order to use a
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* run-time set value of SOMAXCONN, rather than compile-time set. We assume
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* that no other process will be simultaneously frobbing it, and these tests
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* may fail if that assumption is not held.
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*/
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static int somaxconn;
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/*
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* Retrieve the current socket listen queue limit using SO_LISTENQLIMIT.
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*/
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static int
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socket_get_backlog(int sock, int *backlogp, const char *testclass,
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const char *test, const char *testfunc)
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{
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socklen_t len;
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int i;
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len = sizeof(i);
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if (getsockopt(sock, SOL_SOCKET, SO_LISTENQLIMIT, &i, &len) < 0) {
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warn("%s: %s: %s: socket_get_backlog: getsockopt("
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"SOL_SOCKET, SO_LISTENQLIMIT)", testclass, test,
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testfunc);
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return (-1);
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}
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if (len != sizeof(i)) {
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warnx("%s: %s: %s: socket_get_backlog: getsockopt("
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"SOL_SOCKET, SO_LISTENQLIMIT): returned size %d",
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testclass, test, testfunc, len);
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return (-1);
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}
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*backlogp = i;
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return (0);
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}
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/*
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* Create a socket, check the queue limit on creation, perform a listen(),
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* and make sure that the limit was set as expected by listen().
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*/
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static int
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socket_listen(int domain, int type, int protocol, int backlog,
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int create_backlog_assertion, int listen_backlog_assertion, int *sockp,
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const char *domainstring, const char *typestring, const char *testclass,
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const char *test)
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{
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int backlog_retrieved, sock;
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sock = socket(domain, type, protocol);
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if (sock < 0) {
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warn("%s: %s: socket_listen: socket(%s, %s)", testclass,
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test, domainstring, typestring);
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close(sock);
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return (-1);
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}
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if (socket_get_backlog(sock, &backlog_retrieved, testclass, test,
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"socket_listen") < 0) {
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close(sock);
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return (-1);
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}
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if (backlog_retrieved != create_backlog_assertion) {
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warnx("%s: %s: socket_listen: create backlog is %d not %d",
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testclass, test, backlog_retrieved,
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create_backlog_assertion);
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close(sock);
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return (-1);
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}
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if (listen(sock, backlog) < 0) {
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warn("%s: %s: socket_listen: listen(, %d)", testclass, test,
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backlog);
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close(sock);
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return (-1);
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}
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if (socket_get_backlog(sock, &backlog_retrieved, testclass, test,
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"socket_listen") < 0) {
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close(sock);
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return (-1);
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}
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if (backlog_retrieved != listen_backlog_assertion) {
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warnx("%s: %s: socket_listen: listen backlog is %d not %d",
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testclass, test, backlog_retrieved,
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listen_backlog_assertion);
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close(sock);
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return (-1);
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}
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*sockp = sock;
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return (0);
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}
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/*
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* This test creates sockets and tests default states before and after
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* listen(). Specifically, we expect a queue limit of 0 before listen, and
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* then various settings for after listen(). If the passed backlog was
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* either < 0 or > somaxconn, it should be set to somaxconn; otherwise, the
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* passed queue depth.
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*/
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static void
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test_defaults(void)
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{
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int sock;
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/*
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* First pass. Confirm the default is 0. Listen with a backlog of
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* 0 and confirm it gets set that way.
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*/
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if (socket_listen(PF_INET, SOCK_STREAM, 0, 0, 0, 0, &sock, "PF_INET",
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"SOCK_STREAM", "test_defaults", "default_0_listen_0") < 0)
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exit(-1);
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close(sock);
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/*
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* Second pass. Listen with a backlog of -1 and make sure it is set
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* to somaxconn.
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*/
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if (socket_listen(PF_INET, SOCK_STREAM, 0, -1, 0, somaxconn, &sock,
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"PF_INET", "SOCK_STREAM", "test_defaults", "default_0_listen_-1")
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< 0)
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exit(-1);
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close(sock);
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/*
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* Third pass. Listen with a backlog of 1 and make sure it is set to
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* 1.
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*/
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if (socket_listen(PF_INET, SOCK_STREAM, 0, 1, 0, 1, &sock, "PF_INET",
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"SOCK_STREAM", "test_defaults", "default_0_listen_1") < 0)
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exit(-1);
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close(sock);
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/*
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* Fourth pass. Listen with a backlog of somaxconn and make sure it
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* is set to somaxconn.
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*/
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if (socket_listen(PF_INET, SOCK_STREAM, 0, somaxconn, 0, somaxconn,
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&sock, "PF_INET", "SOCK_STREAM", "test_defaults",
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"default_0_listen_somaxconn") < 0)
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exit(-1);
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close(sock);
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/*
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* Fifth pass. Listen with a backlog of somaxconn+1 and make sure it
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* is set to somaxconn.
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*/
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if (socket_listen(PF_INET, SOCK_STREAM, 0, somaxconn+1, 0, somaxconn,
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&sock, "PF_INET", "SOCK_STREAM", "test_defaults",
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"default_0_listen_somaxconn+1") < 0)
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exit(-1);
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close(sock);
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}
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/*
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* Create a socket, set the initial listen() state, then update the queue
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* depth using listen(). Check that the backlog is as expected after both
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* the first and second listen().
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*/
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static int
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socket_listen_update(int domain __unused, int type __unused,
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int protocol __unused, int backlog,
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int update_backlog, int listen_backlog_assertion,
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int update_backlog_assertion, int *sockp, const char *domainstring,
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const char *typestring, const char *testclass, const char *test)
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{
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int backlog_retrieved, sock;
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sock = socket(PF_INET, SOCK_STREAM, 0);
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if (sock < 0) {
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warn("%s: %s: socket_listen_update: socket(%s, %s)",
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testclass, test, domainstring, typestring);
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return (-1);
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}
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if (listen(sock, backlog) < 0) {
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warn("%s: %s: socket_listen_update: initial listen(, %d)",
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testclass, test, backlog);
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close(sock);
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return (-1);
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}
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if (socket_get_backlog(sock, &backlog_retrieved, testclass, test,
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"socket_listen_update") < 0) {
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close(sock);
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return (-1);
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}
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if (backlog_retrieved != listen_backlog_assertion) {
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warnx("%s: %s: socket_listen_update: initial backlog is %d "
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"not %d", testclass, test, backlog_retrieved,
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listen_backlog_assertion);
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close(sock);
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return (-1);
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}
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if (listen(sock, update_backlog) < 0) {
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warn("%s: %s: socket_listen_update: update listen(, %d)",
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testclass, test, update_backlog);
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close(sock);
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return (-1);
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}
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if (socket_get_backlog(sock, &backlog_retrieved, testclass, test,
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"socket_listen_update") < 0) {
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close(sock);
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return (-1);
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}
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if (backlog_retrieved != update_backlog_assertion) {
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warnx("%s: %s: socket_listen_update: updated backlog is %d "
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"not %d", testclass, test, backlog_retrieved,
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update_backlog_assertion);
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close(sock);
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return (-1);
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}
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*sockp = sock;
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return (0);
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}
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/*
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* This test tests using listen() to update the queue depth after a socket
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* has already been marked as listening. We test several cases: setting the
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* socket < 0, 0, 1, somaxconn, and somaxconn + 1.
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*/
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static void
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test_listen_update(void)
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{
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int sock;
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/*
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* Set to 5, update to -1, which should give somaxconn.
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*/
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if (socket_listen_update(PF_INET, SOCK_STREAM, 0, 5, -1, 5, somaxconn,
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&sock, "PF_INET", "SOCK_STREAM", "test_listen_update",
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"update_5,-1") < 0)
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exit(-1);
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close(sock);
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/*
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* Set to 5, update to 0, which should give 0.
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*/
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if (socket_listen_update(PF_INET, SOCK_STREAM, 0, 5, 0, 5, 0, &sock,
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"PF_INET", "SOCK_STREAM", "test_listen_update", "update_5,0")
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< 0)
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exit(-1);
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close(sock);
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/*
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* Set to 5, update to 1, which should give 1.
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*/
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if (socket_listen_update(PF_INET, SOCK_STREAM, 0, 5, 1, 5, 1, &sock,
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"PF_INET", "SOCK_STREAM", "test_listen_update", "update_5,1")
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< 0)
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exit(-1);
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close(sock);
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/*
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* Set to 5, update to somaxconn, which should give somaxconn.
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*/
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if (socket_listen_update(PF_INET, SOCK_STREAM, 0, 5, somaxconn, 5,
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somaxconn, &sock, "PF_INET", "SOCK_STREAM", "test_listen_update",
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"update_5,somaxconn") < 0)
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exit(-1);
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close(sock);
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/*
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* Set to 5, update to somaxconn+1, which should give somaxconn.
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*/
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if (socket_listen_update(PF_INET, SOCK_STREAM, 0, 5, somaxconn+1, 5,
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somaxconn, &sock, "PF_INET", "SOCK_STREAM", "test_listen_update",
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"update_5,somaxconn+1") < 0)
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exit(-1);
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close(sock);
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}
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/*
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* SO_LISTENQLIMIT is a read-only socket option, so make sure we get an error
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* if we try to write it.
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*/
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static void
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test_set_qlimit(void)
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{
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int i, ret, sock;
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sock = socket(PF_INET, SOCK_STREAM, 0);
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if (sock < 0)
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err(-1, "test_set_qlimit: socket(PF_INET, SOCK_STREAM)");
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i = 0;
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ret = setsockopt(sock, SOL_SOCKET, SO_LISTENQLIMIT, &i, sizeof(i));
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if (ret < 0 && errno != ENOPROTOOPT) {
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warn("test_set_qlimit: setsockopt(SOL_SOCKET, "
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"SO_LISTENQLIMIT, 0): unexpected error");
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close(sock);
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}
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if (ret == 0) {
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warnx("test_set_qlimit: setsockopt(SOL_SOCKET, "
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"SO_LISTENQLIMIT, 0) succeeded");
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close(sock);
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exit(-1);
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}
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close(sock);
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}
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int
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main(void)
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{
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size_t len;
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len = sizeof(somaxconn);
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if (sysctlbyname("kern.ipc.soacceptqueue", &somaxconn, &len, NULL, 0)
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< 0)
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err(-1, "sysctlbyname(kern.ipc.soacceptqueue)");
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test_defaults();
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test_listen_update();
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test_set_qlimit();
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return (0);
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}
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