From 1b1baea407a6583db5eef53ef309c5e7b5a6f157 Mon Sep 17 00:00:00 2001 From: Fabien Siron Date: Wed, 6 Jul 2016 15:49:23 +0000 Subject: [PATCH] tests: check decoding of netlink protocol * tests/netlink_protocol.test: New test. * tests/netlink_protocol.c: New file. * tests/.gitignore: Add netlink_protocol. * tests/Makefile.am (check_PROGRAMS): Likewise. (DECODER_TESTS): Add netlink_protocol.test. --- tests/.gitignore | 1 + tests/Makefile.am | 2 + tests/netlink_protocol.c | 120 ++++++++++++++++++++++++++++++++++++ tests/netlink_protocol.test | 11 ++++ 4 files changed, 134 insertions(+) create mode 100644 tests/netlink_protocol.c create mode 100755 tests/netlink_protocol.test diff --git a/tests/.gitignore b/tests/.gitignore index fecd592c..f5a9778c 100644 --- a/tests/.gitignore +++ b/tests/.gitignore @@ -150,6 +150,7 @@ net-yy-netlink net-yy-unix netlink_inet_diag netlink_netlink_diag +netlink_protocol netlink_unix_diag newfstatat nsyscalls diff --git a/tests/Makefile.am b/tests/Makefile.am index fdc3b817..49b89047 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -204,6 +204,7 @@ check_PROGRAMS = \ net-yy-unix \ netlink_inet_diag \ netlink_netlink_diag \ + netlink_protocol \ netlink_unix_diag \ newfstatat \ nsyscalls \ @@ -516,6 +517,7 @@ DECODER_TESTS = \ net-yy-netlink.test \ net-yy-unix.test \ net.test \ + netlink_protocol.test \ newfstatat.test \ nsyscalls.test \ old_mmap.test \ diff --git a/tests/netlink_protocol.c b/tests/netlink_protocol.c new file mode 100644 index 00000000..eb6a843d --- /dev/null +++ b/tests/netlink_protocol.c @@ -0,0 +1,120 @@ +/* + * Check decoding of netlink protocol. + * + * Copyright (c) 2014-2016 Dmitry V. Levin + * Copyright (c) 2016 Fabien Siron + * 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 +#include +#include +#include +#include +#include +#include + +#if !defined NETLINK_SOCK_DIAG && defined NETLINK_INET_DIAG +# define NETLINK_SOCK_DIAG NETLINK_INET_DIAG +#endif + +static void +send_query(const int fd) +{ + struct { + struct nlmsghdr nlh; + char magic[4]; + } req = { + .nlh = { + .nlmsg_len = sizeof(req), + .nlmsg_type = NLMSG_NOOP, + .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST + }, + .magic = "abcd" + }; + + const void *const efault = tail_alloc(sizeof(struct nlmsghdr) - 1); + + if (sendto(fd, &req, sizeof(req), MSG_DONTWAIT, NULL, 0) != + (unsigned) sizeof(req)) + perror_msg_and_skip("sendto"); + + printf("sendto(%d, {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" + ", seq=0, pid=0}, \"abcd\"}, %u, MSG_DONTWAIT, NULL, 0) = %u\n", + fd, (unsigned) sizeof(req), NLM_F_DUMP, + (unsigned) sizeof(req), (unsigned) sizeof(req)); + + /* data length is equal to sizeof(struct nlmsghdr) */ + req.nlh.nlmsg_len = sizeof(req.nlh); + + if (sendto(fd, &req.nlh, sizeof(req.nlh), MSG_DONTWAIT, NULL, 0) != + (unsigned) sizeof(req.nlh)) + perror_msg_and_skip("sendto"); + + printf("sendto(%d, {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" + ", seq=0, pid=0}}, %u, MSG_DONTWAIT, NULL, 0) = %u\n", + fd, (unsigned) sizeof(req.nlh), NLM_F_DUMP, + (unsigned) sizeof(req.nlh), (unsigned) sizeof(req.nlh)); + + /* data length is less than sizeof(struct nlmsghdr) */ + if (sendto(fd, &req.magic, sizeof(req.magic), MSG_DONTWAIT, NULL, 0) != + (unsigned) sizeof(req.magic)) + perror_msg_and_skip("sendto"); + + printf("sendto(%d, \"abcd\", %u, MSG_DONTWAIT, NULL, 0) = %u\n", + fd, (unsigned) sizeof(req.magic), (unsigned) sizeof(req.magic)); + + sendto(fd, efault, sizeof(struct nlmsghdr), MSG_DONTWAIT, NULL, 0); + + printf("sendto(%d, %p, %u, MSG_DONTWAIT, NULL, 0) = -1 " + "EFAULT (%m)\n", fd, efault, (unsigned) sizeof(struct nlmsghdr)); +} + +int main(void) +{ + struct sockaddr_nl addr; + socklen_t len = sizeof(addr); + int fd; + + memset(&addr, 0, sizeof(addr)); + addr.nl_family = AF_NETLINK; + + if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG)) == -1) + perror_msg_and_skip("socket AF_NETLINK"); + + printf("socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG) = %d\n", + fd); + if (bind(fd, (struct sockaddr *) &addr, len)) + perror_msg_and_skip("bind"); + printf("bind(%d, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}" + ", %u) = 0\n", fd, len); + + send_query(fd); + + printf("+++ exited with 0 +++\n"); + + return 0; +} diff --git a/tests/netlink_protocol.test b/tests/netlink_protocol.test new file mode 100755 index 00000000..ab2bb1e8 --- /dev/null +++ b/tests/netlink_protocol.test @@ -0,0 +1,11 @@ +#!/bin/sh + +# Check decoding of netlink protocol. + +. "${srcdir=.}/init.sh" + +# getfdproto is implemented using /proc/self/fd +[ -d /proc/self/fd/ ] || + framework_skip_ '/proc/self/fd/ is not available' + +run_strace_match_diff -e trace=network -- 2.40.0