tests: check decoding of SO_PEERCRED socket option

* tests/so_peercred.c: New file.
* tests/gen_tests.in (so_peercred): New entry.
* tests/pure_executables.list: Add so_peercred.
* tests/.gitignore: Likewise.

diff --git a/tests/.gitignore b/tests/.gitignore
index ec6f4273e0a06b33dcd478abdc43cdd8870e0ad8..34423132980151251fd3ae11f3666372d906ad84 100644 (file)
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -349,6 +349,7 @@ sigreturn
 sigsuspend
 sleep
 so_linger
+so_peercred
 sock_filter-v
 socketcall
 splice

diff --git a/tests/gen_tests.in b/tests/gen_tests.in
index 8320337f6720f611f6af43960493a34b6020c314..986b9cc49c3fcd121c9a629bf390fb9811c59926 100644 (file)
--- a/tests/gen_tests.in
+++ b/tests/gen_tests.in
@@ -300,6 +300,7 @@ sigprocmask -a34
 sigreturn      -esignal='!USR1'
 sigsuspend     -a19 -esignal=none
 so_linger      -e trace=getsockopt,setsockopt
+so_peercred    -e trace=getsockopt
 sock_filter-v  -v -e trace=getsockopt,setsockopt
 socketcall     -a20
 splice

diff --git a/tests/pure_executables.list b/tests/pure_executables.list
index 6bdb99cc18a1ae851f666a22ddbeb2428d0069f3..aca5b1ce719fd461660961b4a8e142e3b9088b7b 100755 (executable)
--- a/tests/pure_executables.list
+++ b/tests/pure_executables.list
@@ -288,6 +288,7 @@ sigprocmask
 sigreturn
 sigsuspend
 so_linger
+so_peercred
 sock_filter-v
 socketcall
 splice

diff --git a/tests/so_peercred.c b/tests/so_peercred.c
new file mode 100644 (file)
index 0000000..53bf071
--- /dev/null
+++ b/tests/so_peercred.c
@@ -0,0 +1,117 @@
+/*
+ * Check decoding of SO_PEERCRED socket option.
+ *
+ * Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "tests.h"
+
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include "print_fields.h"
+
+static const char *errstr;
+
+static int
+get_peercred(int fd, void *val, socklen_t *len)
+{
+       int rc = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, val, len);
+       errstr = sprintrc(rc);
+       return rc;
+}
+
+int
+main(void)
+{
+       TAIL_ALLOC_OBJECT_CONST_PTR(struct ucred, peercred);
+       TAIL_ALLOC_OBJECT_CONST_PTR(socklen_t, len);
+
+       int sv[2];
+       if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
+                perror_msg_and_skip("socketpair AF_UNIX SOCK_STREAM");
+
+       /* classic getsockopt */
+       *len = sizeof(*peercred);
+       get_peercred(sv[0], peercred, len);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED", sv[0]);
+       PRINT_FIELD_D(", {", *peercred, pid);
+       PRINT_FIELD_UID(", ", *peercred, uid);
+       PRINT_FIELD_UID(", ", *peercred, gid);
+       printf("}, [%d]) = %s\n", *len, errstr);
+
+       int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+       if (fd < 0)
+               perror_msg_and_skip("socket AF_UNIX SOCK_STREAM");
+
+       /* getsockopt with optlen larger than necessary - shortened */
+       *len = sizeof(*peercred) + 1;
+       get_peercred(fd, peercred, len);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED", fd);
+       PRINT_FIELD_D(", {", *peercred, pid);
+       PRINT_FIELD_UID(", ", *peercred, uid);
+       PRINT_FIELD_UID(", ", *peercred, gid);
+       printf("}, [%u->%d]) = %s\n",
+              (unsigned int) sizeof(*peercred) + 1, *len, errstr);
+
+       /* getsockopt with optlen smaller than usual - truncated to ucred.pid */
+       *len = sizeof(peercred->pid);
+       get_peercred(fd, peercred, len);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED", fd);
+       PRINT_FIELD_D(", {", *peercred, pid);
+       printf("}, [%d]) = %s\n", *len, errstr);
+
+       /* getsockopt with optlen smaller than usual - truncated to ucred.uid */
+       *len = offsetof(struct ucred, gid);
+       get_peercred(fd, peercred, len);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED", fd);
+       PRINT_FIELD_D(", {", *peercred, pid);
+       PRINT_FIELD_UID(", ", *peercred, uid);
+       printf("}, [%d]) = %s\n", *len, errstr);
+
+       /* getsockopt with optlen larger than usual - truncated to raw */
+       *len = sizeof(*peercred) - 1;
+       get_peercred(fd, peercred, len);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED, ", fd);
+       print_quoted_hex(peercred, *len);
+       printf(", [%d]) = %s\n", *len, errstr);
+
+       /* getsockopt optval EFAULT */
+       *len = sizeof(*peercred);
+       get_peercred(fd, &peercred->uid, len);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED, %p, [%d]) = %s\n",
+              fd, &peercred->uid, *len, errstr);
+
+       /* getsockopt optlen EFAULT */
+       get_peercred(fd, peercred, len + 1);
+       printf("getsockopt(%d, SOL_SOCKET, SO_PEERCRED, %p, %p) = %s\n",
+              fd, peercred, len + 1, errstr);
+
+       puts("+++ exited with 0 +++");
+       return 0;
+}