Differential D15047 Diff 41586 head/tests/sys/capsicum/ioctls_test.c

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head/tests/sys/capsicum/ioctls_test.c

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				/*-
				* Copyright (c) 2018 John Baldwin <jhb@FreeBSD.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.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
				__FBSDID("$FreeBSD$");

				#include <sys/capsicum.h>
				#include <sys/filio.h>
				#include <sys/socket.h>
				#include <sys/wait.h>
				#include <netinet/in.h>
				#include <stdio.h>
				#include <stdlib.h>
				#include <unistd.h>

				#include <atf-c.h>

				/*
				* A variant of ATF_REQUIRE that is suitable for use in child
				* processes. This only works if the parent process is tripped up by
				* the early exit and fails some requirement itself.
				*/
				#define CHILD_REQUIRE(exp) do { \
				if (!(exp)) \
				child_fail_require(__FILE__, __LINE__, \
				#exp " not met"); \
				} while (0)

				static __dead2 void
				child_fail_require(const char file, int line, const char str)
				{
				char buf[128];

				snprintf(buf, sizeof(buf), "%s:%d: %s\n", file, line, str);
				write(2, buf, strlen(buf));
				_exit(32);
				}

				/*
				* Exercise the edge case of a custom ioctl list being copied from a
				* listen socket to an accepted socket.
				*/
				ATF_TC_WITHOUT_HEAD(cap_ioctls__listen_copy);
				ATF_TC_BODY(cap_ioctls__listen_copy, tc)
				{
				struct sockaddr_in sin;
				cap_rights_t rights;
				u_long cmds[] = { FIONREAD };
				socklen_t len;
				pid_t pid;
				char dummy;
				int s[2], status;

				s[0] = socket(AF_INET, SOCK_STREAM, 0);
				ATF_REQUIRE(s[0] > 0);

				/* Bind to an arbitrary unused port. */
				memset(&sin, 0, sizeof(sin));
				sin.sin_len = sizeof(sin);
				sin.sin_family = AF_INET;
				sin.sin_port = 0;
				sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
				ATF_REQUIRE(bind(s[0], (struct sockaddr *)&sin, sizeof(sin)) == 0);

				CHILD_REQUIRE(listen(s[0], 1) == 0);

				len = sizeof(sin);
				ATF_REQUIRE(getsockname(s[0], (struct sockaddr *)&sin, &len) == 0);
				ATF_REQUIRE(len == sizeof(sin));

				cap_rights_init(&rights, CAP_ACCEPT, CAP_IOCTL);
				ATF_REQUIRE(cap_rights_limit(s[0], &rights) == 0);
				ATF_REQUIRE(cap_ioctls_limit(s[0], cmds, nitems(cmds)) == 0);

				pid = fork();
				if (pid == 0) {
				s[1] = accept(s[0], NULL, NULL);
				CHILD_REQUIRE(s[1] > 0);

				/* Close both sockets during exit(). */
				exit(0);
				}

				ATF_REQUIRE(pid > 0);

				ATF_REQUIRE(close(s[0]) == 0);
				s[1] = socket(AF_INET, SOCK_STREAM, 0);
				ATF_REQUIRE(s[1] > 0);
				ATF_REQUIRE(connect(s[1], (struct sockaddr *)&sin, sizeof(sin)) == 0);
				ATF_REQUIRE(read(s[1], &dummy, sizeof(dummy)) == 0);
				ATF_REQUIRE(close(s[1]) == 0);

				ATF_REQUIRE(wait(&status) == pid);
				ATF_REQUIRE(WIFEXITED(status));
				ATF_REQUIRE(WEXITSTATUS(status) == 0);
				}

				ATF_TP_ADD_TCS(tp)
				{

				ATF_TP_ADD_TC(tp, cap_ioctls__listen_copy);

				return (atf_no_error());
				}