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Add unix_passfd, a simple set of regression tests for UNIX domain socket

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file descriptor passing.  These tests are not all currently passed.
This commit is contained in:
Robert Watson 2005-11-09 21:41:20 +00:00
parent 923633b4b5
commit 794bf8edc7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=152251
2 changed files with 314 additions and 0 deletions
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7
tools/regression/sockets/unix_passfd/Makefile Normal file
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# $FreeBSD$
PROG= unix_passfd
NO_MAN=
WARNS= 2
.include <bsd.prog.mk>

307
tools/regression/sockets/unix_passfd/unix_passfd.c Normal file
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/*-
* Copyright (c) 2005 Robert N. M. Watson
* 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <err.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
/*
* UNIX domain sockets allow file descriptors to be passed via "ancillary
* data", or control messages. This regression test is intended to exercise
* this facility, both performing some basic tests that it operates, and also
* causing some kernel edge cases to execute, such as garbage collection when
* there are cyclic file descriptor references. Right now we test only with
* stream sockets, but ideally we'd also test with datagram sockets.
*/
static void
domainsocketpair(const char *test, int *fdp)
{
if (socketpair(PF_UNIX, SOCK_STREAM, 0, fdp) < 0)
err(-1, "%s: socketpair(PF_UNIX, SOCK_STREAM)", test);
}
static void
closesocketpair(int *fdp)
{
close(fdp[0]);
close(fdp[1]);
}
static void
tempfile(const char *test, int *fdp)
{
char path[PATH_MAX];
int fd;
snprintf(path, PATH_MAX, "/tmp/unix_passfd.XXXXXXXXXXXXXXX");
fd = mkstemp(path);
if (fd < 0)
err(-1, "%s: mkstemp(%s)", test, path);
(void)unlink(path);
*fdp = fd;
}
static void
dofstat(const char *test, int fd, struct stat *sb)
{
if (fstat(fd, sb) < 0)
err(-1, "%s: fstat", test);
}
static void
samefile(const char *test, struct stat *sb1, struct stat *sb2)
{
if (sb1->st_dev != sb2->st_dev)
err(-1, "%s: samefile: different device", test);
if (sb1->st_ino != sb2->st_ino)
err(-1, "%s: samefile: different inode", test);
}
static void
sendfd(const char *test, int sockfd, int sendfd)
{
struct iovec iovec;
char ch;
struct {
struct cmsghdr cmsghdr;
int fd;
} message;
struct msghdr msghdr;
ssize_t len;
bzero(&msghdr, sizeof(msghdr));
bzero(&message, sizeof(message));
ch = 0;
msghdr.msg_control = &message;
msghdr.msg_controllen = sizeof(message);
iovec.iov_base = &ch;
iovec.iov_len = sizeof(ch);
msghdr.msg_iov = &iovec;
msghdr.msg_iovlen = 1;
message.cmsghdr.cmsg_len = sizeof(message);
message.cmsghdr.cmsg_level = SOL_SOCKET;
message.cmsghdr.cmsg_type = SCM_RIGHTS;
message.fd = sendfd;
len = sendmsg(sockfd, &msghdr, 0);
if (len < 0)
err(-1, "%s: sendmsg", test);
if (len != sizeof(ch))
errx(-1, "%s: sendmsg: %d bytes sent", test, len);
}
static void
recvfd(const char *test, int sockfd, int *recvfd)
{
struct {
struct cmsghdr cmsghdr;
int fd;
} message;
struct msghdr msghdr;
struct iovec iovec;
ssize_t len;
char ch;
bzero(&msghdr, sizeof(msghdr));
bzero(&message, sizeof(message));
ch = 0;
msghdr.msg_control = &message;
msghdr.msg_controllen = sizeof(message);
iovec.iov_base = &ch;
iovec.iov_len = sizeof(ch);
msghdr.msg_iov = &iovec;
msghdr.msg_iovlen = 1;
iovec.iov_len = sizeof(ch);
msghdr.msg_iov = &iovec;
msghdr.msg_iovlen = 1;
message.cmsghdr.cmsg_len = sizeof(message);
message.cmsghdr.cmsg_level = SOL_SOCKET;
message.cmsghdr.cmsg_type = SCM_RIGHTS;
message.fd = -1;
len = recvmsg(sockfd, &msghdr, 0);
if (len < 0)
err(-1, "%s: recvmsg", test);
if (len != sizeof(ch))
errx(-1, "%s: recvmsg: %d bytes received", test, len);
if (message.fd == -1)
errx(-1, "%s: recvmsg: received fd -1", test);
*recvfd = message.fd;
}
int
main(int argc, char *argv[])
{
struct stat putfd_1_stat, putfd_2_stat, getfd_1_stat, getfd_2_stat;
int fd[2], putfd_1, putfd_2, getfd_1, getfd_2;
const char *test;
/*
* First test: put a temporary file into a UNIX domain socket, then
* take it out and make sure it's the same file. First time around,
* don't close the reference after sending.
*/
test = "test1-simplesendfd";
printf("beginning %s\n", test);
domainsocketpair(test, fd);
tempfile(test, &putfd_1);
dofstat(test, putfd_1, &putfd_1_stat);
sendfd(test, fd[0], putfd_1);
recvfd(test, fd[1], &getfd_1);
dofstat(test, getfd_1, &getfd_1_stat);
samefile(test, &putfd_1_stat, &getfd_1_stat);
close(putfd_1);
close(getfd_1);
closesocketpair(fd);
printf("%s passed\n", test);
/*
* Second test: same as first, only close the file reference after
* sending, so that the only reference is the descriptor in the UNIX
* domain socket buffer.
*/
test = "test2-sendandclose";
printf("beginning %s\n", test);
domainsocketpair(test, fd);
tempfile(test, &putfd_1);
dofstat(test, putfd_1, &putfd_1_stat);
sendfd(test, fd[0], putfd_1);
close(putfd_1);
recvfd(test, fd[1], &getfd_1);
dofstat(test, getfd_1, &getfd_1_stat);
samefile(test, &putfd_1_stat, &getfd_1_stat);
close(getfd_1);
closesocketpair(fd);
printf("%s passed\n", test);
/*
* Third test: put a temporary file into a UNIX domain socket, then
* close both endpoints causing garbage collection to kick off.
*/
test = "test3-sendandcancel";
printf("beginning %s\n", test);
domainsocketpair(test, fd);
tempfile(test, &putfd_1);
sendfd(test, fd[0], putfd_1);
close(putfd_1);
closesocketpair(fd);
printf("%s passed\n", test);
/*
* Send two files. Then receive them. Make sure they are returned
* in the right order, and both get there.
*/
test = "test4-twofile";
printf("beginning %s\n", test);
domainsocketpair(test, fd);
tempfile(test, &putfd_1);
tempfile(test, &putfd_2);
dofstat(test, putfd_1, &putfd_1_stat);
dofstat(test, putfd_2, &putfd_2_stat);
sendfd(test, fd[0], putfd_1);
sendfd(test, fd[0], putfd_2);
close(putfd_1);
close(putfd_2);
recvfd(test, fd[1], &getfd_1);
recvfd(test, fd[1], &getfd_2);
dofstat(test, getfd_1, &getfd_1_stat);
dofstat(test, getfd_2, &getfd_2_stat);
samefile(test, &putfd_1_stat, &getfd_1_stat);
samefile(test, &putfd_2_stat, &getfd_2_stat);
close(getfd_1);
close(getfd_2);
closesocketpair(fd);
printf("%s passed\n", test);
/*
* Big bundling test. Send an endpoint of the UNIX domain socket
* over itself, closing the door behind it.
*/
test = "test5-bundle";
printf("beginning %s\n", test);
domainsocketpair(test, fd);
sendfd(test, fd[0], fd[0]);
close(fd[0]);
recvfd(test, fd[1], &getfd_1);
close(getfd_1);
close(fd[1]);
printf("%s passed\n", test);
/*
* Big bundling test part two: Send an endpoint of the UNIX domain
* socket over itself, close the door behind it, and never remove it
* from the other end.
*/
test = "test6-bundlecancel";
printf("beginning %s\n", test);
domainsocketpair(test, fd);
sendfd(test, fd[0], fd[0]);
sendfd(test, fd[1], fd[0]);
closesocketpair(fd);
printf("%s passed\n", test);
return (0);
}