[src/trunk]: src/tests/net/net Add a unix socket pathname size limit test.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f9e48eb285a6
branches:  trunk
changeset: 769978:f9e48eb285a6
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Sep 28 16:13:03 2011 +0000

description:
Add a unix socket pathname size limit test.

diffstat:

 tests/net/net/Makefile |    7 +-
 tests/net/net/t_unix.c |  173 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 177 insertions(+), 3 deletions(-)

diffs (198 lines):

diff -r b11554384c8b -r f9e48eb285a6 tests/net/net/Makefile
--- a/tests/net/net/Makefile    Wed Sep 28 15:52:47 2011 +0000
+++ b/tests/net/net/Makefile    Wed Sep 28 16:13:03 2011 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.1 2011/01/11 10:51:45 pooka Exp $
+# $NetBSD: Makefile,v 1.2 2011/09/28 16:13:03 christos Exp $
 #
 
 .include <bsd.own.mk>
@@ -6,8 +6,9 @@
 TESTSDIR=      ${TESTSBASE}/net/net
 
 TESTS_C=       t_raw
+TESTS_C=       t_unix
 
-LDADD+=                -lrumpnet_local -lrumpnet_netinet -lrumpnet_net -lrumpnet
-LDADD+=                -lrumpvfs -lrump -lrumpuser -lpthread
+LDADD.t_raw+=          -lrumpnet_local -lrumpnet_netinet -lrumpnet_net
+LDADD.t_raw+=          -lrunnet -lrumpvfs -lrump -lrumpuser -lpthread
 
 .include <bsd.test.mk>
diff -r b11554384c8b -r f9e48eb285a6 tests/net/net/t_unix.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/net/net/t_unix.c    Wed Sep 28 16:13:03 2011 +0000
@@ -0,0 +1,173 @@
+/*     $NetBSD: t_unix.c,v 1.1 2011/09/28 16:13:03 christos Exp $      */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__RCSID("$Id: t_unix.c,v 1.1 2011/09/28 16:13:03 christos Exp $");
+
+#include <stdio.h>
+#include <err.h>
+#include <errno.h>
+#include <string.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+static __dead int
+acc(int s)
+{
+       char guard1;
+       struct sockaddr_un sun;
+       char guard2;
+       socklen_t len;
+
+       guard1 = guard2 = 's';
+
+       len = sizeof(sun);
+       if (accept(s, (struct sockaddr *)&sun, &len) == -1)
+               err(EXIT_FAILURE, "connect");
+       if (guard1 != 's')
+               errx(EXIT_FAILURE, "guard1 = '%c'", guard1);
+       if (guard2 != 's')
+               errx(EXIT_FAILURE, "guard2 = '%c'", guard2);
+       exit(0);
+}
+
+static int
+test(size_t len)
+{
+       struct sockaddr_un *sun;
+       int s, s2;
+       size_t slen;
+
+       slen = len + offsetof(struct sockaddr_un, sun_path) + 1;
+       
+       if ((sun = calloc(1, slen)) == NULL)
+               err(EXIT_FAILURE, "calloc");
+
+       s = socket(AF_UNIX, SOCK_STREAM, 0);
+       if (s == -1)
+               err(EXIT_FAILURE, "socket");
+
+       memset(sun->sun_path, 'a', len);
+       sun->sun_path[len] = '\0';
+       (void)unlink(sun->sun_path);
+
+       sun->sun_len = SUN_LEN(sun);
+       sun->sun_family = AF_UNIX;
+
+       if (bind(s, (struct sockaddr *)sun, sun->sun_len) == -1)
+#ifdef TEST
+               err(EXIT_FAILURE, "bind");
+#else
+               return -1;
+#endif
+
+       if (listen(s, 5) == -1)
+               err(EXIT_FAILURE, "listen");
+
+       switch (fork()) {
+       case -1:
+               err(EXIT_FAILURE, "fork");
+       case 0:
+               sleep(1);
+               s2 = socket(AF_UNIX, SOCK_STREAM, 0);
+               if (s == -1)
+                       err(EXIT_FAILURE, "socket");
+               if (connect(s2, (struct sockaddr *)sun, sun->sun_len) == -1)
+                       err(EXIT_FAILURE, "connect");
+               break;
+       default:
+               acc(s);
+       }
+
+       return 0;
+}
+
+#ifndef TEST
+#include <atf-c.h>
+
+ATF_TC(sockaddr_un_len_exceed);
+ATF_TC_HEAD(sockaddr_un_len_exceed, tc)
+{
+
+       atf_tc_set_md_var(tc, "descr", "Check that exceeding the size of "
+           "unix domain sockets does not trash memory or kernel when "
+           "exceeding the size of the fixed sun_path");
+}
+
+ATF_TC_BODY(sockaddr_un_len_exceed, tc)
+{
+       ATF_REQUIRE_MSG(test(254) == -1, "test(254): %s", strerror(errno));
+}
+
+ATF_TC(sockaddr_un_len_max);
+ATF_TC_HEAD(sockaddr_un_len_max, tc)
+{
+
+       atf_tc_set_md_var(tc, "descr", "Check that we can use the maximum "
+           "unix domain socket pathlen (253): 255 - sizeof(sun_len) - "
+           "sizeof(sun_family)");
+}
+
+ATF_TC_BODY(sockaddr_un_len_max, tc)
+{
+       ATF_REQUIRE_MSG(test(253) == 0, "test(253): %s", strerror(errno));
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+       ATF_TP_ADD_TC(tp, sockaddr_un_len_exceed);
+       ATF_TP_ADD_TC(tp, sockaddr_un_len_max);
+       return atf_no_error();
+}
+#else
+int
+main(int argc, char *argv[])
+{
+       size_t len;
+
+       if (argc == 1) {
+               fprintf(stderr, "Usage: %s <len>\n", getprogname());
+               return EXIT_FAILURE;
+       }
+       test(atoi(argv[1]));
+}
+#endif