Date: Thu, 20 Mar 2014 20:39:42 +0000 (UTC) From: Alan Somers <asomers@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r263445 - in head: etc/mtree sbin/ifconfig sbin/ifconfig/tests tests/sys tests/sys/netinet Message-ID: <201403202039.s2KKdgAl012905@svn.freebsd.org>
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Author: asomers Date: Thu Mar 20 20:39:41 2014 New Revision: 263445 URL: http://svnweb.freebsd.org/changeset/base/263445 Log: Add several ATF tests that deal with multiple fibs. They're described in several different PRs, but the tests share some common code, so I'm committing them together. sbin/ifconfig/tests sbin/ifconfig/tests/fibs_test.sh sbin/ifconfig/tests/Makefile sbin/ifconfig/Makefile Add fibs_test.sh, which regresses bin/187551 tests/sys/netinet tests/sys/netinet/fibs_test.sh tests/sys/netinet/udp_dontroute.c tests/sys/netinet/Makefile tests/sys/Makefile Add fibs_test.sh, which regresses kern/167947, kern/187552 kern/187549, kern/187550, and kern/187553 etc/mtree/BSD.tests.dist Add newly created directories PR: bin/187551 PR: kern/167947 PR: kern/187552 PR: kern/187549 PR: kern/187550 PR: kern/187553 Discussed with: melifaro MFC after: 3 weeks Sponsored by: Spectra Logic Corporation Added: head/sbin/ifconfig/tests/ head/sbin/ifconfig/tests/Makefile (contents, props changed) head/sbin/ifconfig/tests/fibs_test.sh (contents, props changed) head/tests/sys/netinet/ head/tests/sys/netinet/Makefile (contents, props changed) head/tests/sys/netinet/fibs_test.sh (contents, props changed) head/tests/sys/netinet/udp_dontroute.c (contents, props changed) Modified: head/etc/mtree/BSD.tests.dist head/sbin/ifconfig/Makefile head/tests/sys/Makefile Modified: head/etc/mtree/BSD.tests.dist ============================================================================== --- head/etc/mtree/BSD.tests.dist Thu Mar 20 20:33:18 2014 (r263444) +++ head/etc/mtree/BSD.tests.dist Thu Mar 20 20:39:41 2014 (r263445) @@ -75,6 +75,8 @@ .. growfs .. + ifconfig + .. mdconfig .. .. @@ -91,6 +93,8 @@ sys kern .. + netinet + .. .. usr.bin apply Modified: head/sbin/ifconfig/Makefile ============================================================================== --- head/sbin/ifconfig/Makefile Thu Mar 20 20:33:18 2014 (r263444) +++ head/sbin/ifconfig/Makefile Thu Mar 20 20:39:41 2014 (r263445) @@ -63,4 +63,8 @@ MAN= ifconfig.8 CFLAGS+= -Wall -Wmissing-prototypes -Wcast-qual -Wwrite-strings -Wnested-externs WARNS?= 2 +.if ${MK_TESTS} != "no" +SUBDIR+= tests +.endif + .include <bsd.prog.mk> Added: head/sbin/ifconfig/tests/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sbin/ifconfig/tests/Makefile Thu Mar 20 20:39:41 2014 (r263445) @@ -0,0 +1,9 @@ +# $FreeBSD$ + +.include <bsd.own.mk> + +TESTSDIR= ${TESTSBASE}/sbin/ifconfig + +ATF_TESTS_SH= fibs_test + +.include <bsd.test.mk> Added: head/sbin/ifconfig/tests/fibs_test.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sbin/ifconfig/tests/fibs_test.sh Thu Mar 20 20:39:41 2014 (r263445) @@ -0,0 +1,126 @@ +# +# Copyright (c) 2014 Spectra Logic Corporation +# 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, +# without modification. +# 2. Redistributions in binary form must reproduce at minimum a disclaimer +# substantially similar to the "NO WARRANTY" disclaimer below +# ("Disclaimer") and any redistribution must be conditioned upon +# including a substantially similar Disclaimer requirement for further +# binary redistribution. +# +# NO WARRANTY +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. +# +# Authors: Alan Somers (Spectra Logic Corporation) +# +# $FreeBSD$ + + +# Regression test for bin/187551 +atf_test_case process_fib cleanup +process_fib_head() +{ + atf_set "descr" "ifconfig will set its process fib whenever configuring an interface with nondefault fib" + atf_set "require.user" "root" + atf_set "require.config" "fibs" +} +process_fib_body() +{ + atf_expect_fail "bin/187551 ifconfig should change its process fib when configuring an interface with nondefault fib" + # Configure the TAP interface to use an RFC5737 nonrouteable address + # and a non-default fib + ADDR="192.0.2.2" + SUBNET="192.0.2.0" + MASK="24" + + # Check system configuration + if [ 0 != `sysctl -n net.add_addr_allfibs` ]; then + atf_skip "This test requires net.add_addr_allfibs=0" + fi + get_fibs 1 + + # Configure a TAP interface + get_tap + ktrace ifconfig $TAP ${ADDR}/${MASK} fib $FIB0 + if kdump -s | egrep -q 'CALL[[:space:]]+setfib'; then + atf_pass + else + atf_fail "ifconfig never called setfib(2)" + fi +} + +process_fib_cleanup() +{ + cleanup_tap +} + +atf_init_test_cases() +{ + atf_add_test_case process_fib +} + + +# parameter numfibs The number of fibs to lookup +get_fibs() +{ + NUMFIBS=$1 + net_fibs=`sysctl -n net.fibs` + i=0 + while [ $i -lt "$NUMFIBS" ]; do + fib=`atf_config_get "fibs" | \ + awk -v i=$(( i + 1 )) '{print $i}'` + echo "fib is ${fib}" + eval FIB${i}=${fib} + if [ "$fib" -ge "$net_fibs" ]; then + atf_skip "The ${i}th configured fib is ${fib}, which is not less than net.fibs, which is ${net_fibs}" + fi + i=$(( $i + 1 )) + done +} + + + +# Creates a new tap(4) interface, registers it for cleanup, and returns the +# name via the environment variable TAP +get_tap() +{ + local TAPN=0 + while ! ifconfig tap${TAPN} create > /dev/null 2>&1; do + if [ "$TAPN" -ge 8 ]; then + atf_skip "Could not create a tap(4) interface" + else + TAPN=$(($TAPN + 1)) + fi + done + local TAPD=tap${TAPN} + # Record the TAP device so we can clean it up later + echo ${TAPD} >> "tap_devices_to_cleanup" + TAP=${TAPD} +} + + + + +cleanup_tap() +{ + for TAPD in `cat "tap_devices_to_cleanup"`; do + ifconfig ${TAPD} destroy + done +} + Modified: head/tests/sys/Makefile ============================================================================== --- head/tests/sys/Makefile Thu Mar 20 20:33:18 2014 (r263444) +++ head/tests/sys/Makefile Thu Mar 20 20:39:41 2014 (r263445) @@ -5,6 +5,7 @@ .PATH: ${.CURDIR}/.. TESTS_SUBDIRS+= kern +TESTS_SUBDIRS+= netinet TESTSDIR= ${TESTSBASE}/sys KYUAFILE= yes Added: head/tests/sys/netinet/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tests/sys/netinet/Makefile Thu Mar 20 20:39:41 2014 (r263445) @@ -0,0 +1,12 @@ +# $FreeBSD$ + +TESTSDIR= ${TESTSBASE}/sys/netinet +BINDIR= ${TESTSDIR} + +ATF_TESTS_SH+= fibs_test +PROG= udp_dontroute +SRCS= udp_dontroute.c +NO_MAN= +WARNS?= 6 + +.include <bsd.test.mk> Added: head/tests/sys/netinet/fibs_test.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tests/sys/netinet/fibs_test.sh Thu Mar 20 20:39:41 2014 (r263445) @@ -0,0 +1,371 @@ +# +# Copyright (c) 2014 Spectra Logic Corporation +# 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, +# without modification. +# 2. Redistributions in binary form must reproduce at minimum a disclaimer +# substantially similar to the "NO WARRANTY" disclaimer below +# ("Disclaimer") and any redistribution must be conditioned upon +# including a substantially similar Disclaimer requirement for further +# binary redistribution. +# +# NO WARRANTY +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. +# +# Authors: Alan Somers (Spectra Logic Corporation) +# +# $FreeBSD$ + +# All of the tests in this file requires the test-suite config variable "fibs" +# to be defined to a space-delimited list of FIBs that may be used for testing. + +# arpresolve should check the interface fib for routes to a target when +# creating an ARP table entry. This is a regression for kern/167947, where +# arpresolve only checked the default route. +# +# Outline: +# Create two tap(4) interfaces +# Simulate a crossover cable between them by using net/socat +# Use nping (from security/nmap) to send an ICMP echo request from one +# interface to the other, spoofing the source IP. The source IP must be +# spoofed, or else it will already have an entry in the arp table. +# Check whether an arp entry exists for the spoofed IP +atf_test_case arpresolve_checks_interface_fib cleanup +arpresolve_checks_interface_fib_head() +{ + atf_set "descr" "arpresolve should check the interface fib, not the default fib, for routes" + atf_set "require.user" "root" + atf_set "require.config" "fibs" + atf_set "require.progs" "socat nping" +} +arpresolve_checks_interface_fib_body() +{ + atf_expect_fail "kern/167947 arpresolve checks only the default FIB for the interface route" + # Configure the TAP interfaces to use a RFC5737 nonrouteable addresses + # and a non-default fib + ADDR0="192.0.2.2" + ADDR1="192.0.2.3" + SUBNET="192.0.2.0" + # Due to bug TBD (regressed by multiple_fibs_on_same_subnet) we need + # diffferent subnet masks, or FIB1 won't have a subnet route. + MASK0="24" + MASK1="25" + # Spoof a MAC that is reserved per RFC7042 + SPOOF_ADDR="192.0.2.4" + SPOOF_MAC="00:00:5E:00:53:00" + + # Check system configuration + if [ 0 != `sysctl -n net.add_addr_allfibs` ]; then + atf_skip "This test requires net.add_addr_allfibs=0" + fi + get_fibs 2 + + # Configure TAP interfaces + setup_tap "$FIB0" ${ADDR0} ${MASK0} + TAP0=$TAP + setup_tap "$FIB1" ${ADDR1} ${MASK1} + TAP1=$TAP + + # Simulate a crossover cable + socat /dev/${TAP0} /dev/${TAP1} & + SOCAT_PID=$! + echo ${SOCAT_PID} >> "processes_to_kill" + + # Send an ICMP echo request with a spoofed source IP + setfib 2 nping -c 1 -e ${TAP0} -S ${SPOOF_ADDR} \ + --source-mac ${SPOOF_MAC} --icmp --icmp-type "echo-request" \ + --icmp-code 0 --icmp-id 0xdead --icmp-seq 1 --data 0xbeef \ + ${ADDR1} + # For informational and debugging purposes only, look for the + # characteristic error message + dmesg | grep "llinfo.*${SPOOF_ADDR}" + # Check that the ARP entry exists + atf_check -o match:"${SPOOF_ADDR}.*expires" setfib 3 arp ${SPOOF_ADDR} +} +arpresolve_checks_interface_fib_cleanup() +{ + for PID in `cat "processes_to_kill"`; do + kill $PID + done + cleanup_tap +} + + +# Regression test for kern/187549 +atf_test_case loopback_and_network_routes_on_nondefault_fib cleanup +loopback_and_network_routes_on_nondefault_fib_head() +{ + atf_set "descr" "When creating and deleting loopback routes, use the interface's fib" + atf_set "require.user" "root" + atf_set "require.config" "fibs" +} + +loopback_and_network_routes_on_nondefault_fib_body() +{ + atf_expect_fail "kern/187549 Host and network routes for a new interface appear in the wrong FIB" + # Configure the TAP interface to use an RFC5737 nonrouteable address + # and a non-default fib + ADDR="192.0.2.2" + SUBNET="192.0.2.0" + MASK="24" + + # Check system configuration + if [ 0 != `sysctl -n net.add_addr_allfibs` ]; then + atf_skip "This test requires net.add_addr_allfibs=0" + fi + get_fibs 1 + + # Configure a TAP interface + setup_tap ${FIB0} ${ADDR} ${MASK} + + # Check whether the host route exists in only the correct FIB + setfib ${FIB0} netstat -rn -f inet | grep -q "^${ADDR}.*UHS.*lo0" + if [ 0 -ne $? ]; then + setfib ${FIB0} netstat -rn -f inet + atf_fail "Host route did not appear in the correct FIB" + fi + setfib 0 netstat -rn -f inet | grep -q "^${ADDR}.*UHS.*lo0" + if [ 0 -eq $? ]; then + setfib 0 netstat -rn -f inet + atf_fail "Host route appeared in the wrong FIB" + fi + + # Check whether the network route exists in only the correct FIB + setfib ${FIB0} netstat -rn -f inet | \ + grep -q "^${SUBNET}/${MASK}.*${TAPD}" + if [ 0 -ne $? ]; then + setfib ${FIB0} netstat -rn -f inet + atf_fail "Network route did not appear in the correct FIB" + fi + setfib 0 netstat -rn -f inet | \ + grep -q "^${SUBNET}/${MASK}.*${TAPD}" + if [ 0 -eq $? ]; then + setfib ${FIB0} netstat -rn -f inet + atf_fail "Network route appeared in the wrong FIB" + fi +} + +loopback_and_network_routes_on_nondefault_fib_cleanup() +{ + cleanup_tap +} + + +# Regression test for kern/187552 +atf_test_case default_route_with_multiple_fibs_on_same_subnet cleanup +default_route_with_multiple_fibs_on_same_subnet_head() +{ + atf_set "descr" "Multiple interfaces on the same subnet but with different fibs can both have default routes" + atf_set "require.user" "root" + atf_set "require.config" "fibs" +} + +default_route_with_multiple_fibs_on_same_subnet_body() +{ + atf_expect_fail "kern/187552 default route uses the wrong interface when multiple interfaces have the same subnet but different fibs" + # Configure the TAP interfaces to use a RFC5737 nonrouteable addresses + # and a non-default fib + ADDR0="192.0.2.2" + ADDR1="192.0.2.3" + GATEWAY="192.0.2.1" + SUBNET="192.0.2.0" + MASK="24" + + # Check system configuration + if [ 0 != `sysctl -n net.add_addr_allfibs` ]; then + atf_skip "This test requires net.add_addr_allfibs=0" + fi + get_fibs 2 + + # Configure TAP interfaces + setup_tap "$FIB0" ${ADDR0} ${MASK} + TAP0=$TAP + setup_tap "$FIB1" ${ADDR1} ${MASK} + TAP1=$TAP + + # Attempt to add default routes + setfib ${FIB0} route add default ${GATEWAY} + setfib ${FIB1} route add default ${GATEWAY} + + # Verify that the default route exists for both fibs, with their + # respective interfaces. + atf_check -o match:"^default.*${TAP0}$" \ + setfib ${FIB0} netstat -rn -f inet + atf_check -o match:"^default.*${TAP1}$" \ + setfib ${FIB1} netstat -rn -f inet +} + +default_route_with_multiple_fibs_on_same_subnet_cleanup() +{ + cleanup_tap +} + + +# Regression test for kern/187550 +atf_test_case subnet_route_with_multiple_fibs_on_same_subnet cleanup +subnet_route_with_multiple_fibs_on_same_subnet_head() +{ + atf_set "descr" "Multiple FIBs can have subnet routes for the same subnet" + atf_set "require.user" "root" + atf_set "require.config" "fibs" +} + +subnet_route_with_multiple_fibs_on_same_subnet_body() +{ + atf_expect_fail "kern/187550 Multiple interfaces on different FIBs but the same subnet don't all have a subnet route" + # Configure the TAP interfaces to use a RFC5737 nonrouteable addresses + # and a non-default fib + ADDR0="192.0.2.2" + ADDR1="192.0.2.3" + SUBNET="192.0.2.0" + MASK="24" + + # Check system configuration + if [ 0 != `sysctl -n net.add_addr_allfibs` ]; then + atf_skip "This test requires net.add_addr_allfibs=0" + fi + get_fibs 2 + + # Configure TAP interfaces + setup_tap "$FIB0" ${ADDR0} ${MASK} + setup_tap "$FIB1" ${ADDR1} ${MASK} + + # Check that a subnet route exists on both fibs + atf_check -o ignore setfib "$FIB0" route get $ADDR1 + atf_check -o ignore setfib "$FIB1" route get $ADDR0 +} + +subnet_route_with_multiple_fibs_on_same_subnet_cleanup() +{ + cleanup_tap +} + +# Test that source address selection works correctly for UDP packets with +# SO_DONTROUTE set that are sent on non-default FIBs. +# This bug was discovered with "setfib 1 netperf -t UDP_STREAM -H some_host" +# Regression test for kern/187553 +atf_test_case udp_dontroute cleanup +udp_dontroute_head() +{ + atf_set "descr" "Source address selection for UDP packets with SO_DONTROUTE on non-default FIBs works" + atf_set "require.user" "root" + atf_set "require.config" "fibs" +} + +udp_dontroute_body() +{ + atf_expect_fail "kern/187553 Source address selection for UDP packets with SO_DONTROUTE uses the default FIB" + # Configure the TAP interface to use an RFC5737 nonrouteable address + # and a non-default fib + ADDR="192.0.2.2" + SUBNET="192.0.2.0" + MASK="24" + # Use a different IP on the same subnet as the target + TARGET="192.0.2.100" + + # Check system configuration + if [ 0 != `sysctl -n net.add_addr_allfibs` ]; then + atf_skip "This test requires net.add_addr_allfibs=0" + fi + get_fibs 1 + + # Configure a TAP interface + setup_tap ${FIB0} ${ADDR} ${MASK} + + # Send a UDP packet with SO_DONTROUTE. In the failure case, it will + # return ENETUNREACH + SRCDIR=`atf_get_srcdir` + atf_check -o ignore setfib ${FIB0} ${SRCDIR}/udp_dontroute ${TARGET} +} + +udp_dontroute_cleanup() +{ + cleanup_tap +} + + +atf_init_test_cases() +{ + atf_add_test_case arpresolve_checks_interface_fib + atf_add_test_case loopback_and_network_routes_on_nondefault_fib + atf_add_test_case default_route_with_multiple_fibs_on_same_subnet + atf_add_test_case subnet_route_with_multiple_fibs_on_same_subnet + atf_add_test_case udp_dontroute +} + +# Looks up one or more fibs from the configuration data and validates them. +# Returns the results in the env varilables FIB0, FIB1, etc. + +# parameter numfibs The number of fibs to lookup +get_fibs() +{ + NUMFIBS=$1 + net_fibs=`sysctl -n net.fibs` + i=0 + while [ $i -lt "$NUMFIBS" ]; do + fib=`atf_config_get "fibs" | \ + awk -v i=$(( i + 1 )) '{print $i}'` + echo "fib is ${fib}" + eval FIB${i}=${fib} + if [ "$fib" -ge "$net_fibs" ]; then + atf_skip "The ${i}th configured fib is ${fib}, which is not less than net.fibs, which is ${net_fibs}" + fi + i=$(( $i + 1 )) + done +} + +# Creates a new tap(4) interface, registers it for cleanup, and returns the +# name via the environment variable TAP +get_tap() +{ + local TAPN=0 + while ! ifconfig tap${TAPN} create > /dev/null 2>&1; do + if [ "$TAPN" -ge 8 ]; then + atf_skip "Could not create a tap(4) interface" + else + TAPN=$(($TAPN + 1)) + fi + done + local TAPD=tap${TAPN} + # Record the TAP device so we can clean it up later + echo ${TAPD} >> "tap_devices_to_cleanup" + TAP=${TAPD} +} + +# Create a tap(4) interface, configure it, and register it for cleanup. +# parameters: +# fib +# IP address +# Netmask in number of bits (eg 24 or 8) +# Return: the tap interface name as the env variable TAP +setup_tap() +{ + local FIB=$1 + local ADDR=$2 + local MASK=$3 + get_tap + echo setfib ${FIB} ifconfig $TAP ${ADDR}/${MASK} fib $FIB + setfib ${FIB} ifconfig $TAP ${ADDR}/${MASK} fib $FIB +} + +cleanup_tap() +{ + for TAPD in `cat "tap_devices_to_cleanup"`; do + ifconfig ${TAPD} destroy + done +} Added: head/tests/sys/netinet/udp_dontroute.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/tests/sys/netinet/udp_dontroute.c Thu Mar 20 20:39:41 2014 (r263445) @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2014 Spectra Logic Corporation + * 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, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. + * + * Authors: Alan Somers (Spectra Logic Corporation) + * + * $FreeBSD$ + */ + +#include <arpa/inet.h> +#include <netinet/in.h> +#include <sys/types.h> +#include <sys/socket.h> + +#include <err.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +/* + * Sends a single UDP packet to the provided address, with SO_DONTROUTE set + * I couldn't find a way to do this with builtin utilities like nc(1) + */ +int main(int argc, char **argv) +{ + struct sockaddr_in dst; + int s; + int opt; + int ret; + const char* buf = "Hello, World!"; + + if (argc != 2) { + fprintf(stderr, "Usage: %s ip_address\n", argv[0]); + exit(2); + } + s = socket(PF_INET, SOCK_DGRAM, 0); + if (s < 0) + err(errno, "socket"); + opt = 1; + + ret = setsockopt(s, SOL_SOCKET, SO_DONTROUTE, &opt, sizeof(opt)); + if (ret == -1) + err(errno, "setsockopt(SO_DONTROUTE)"); + + dst.sin_len = sizeof(dst); + dst.sin_family = AF_INET; + dst.sin_port = htons(46120); + dst.sin_addr.s_addr = inet_addr(argv[1]); + if (dst.sin_addr.s_addr == htonl(INADDR_NONE)) { + fprintf(stderr, "Invalid address: %s\n", argv[1]); + exit(2); + } + ret = sendto(s, buf, strlen(buf), 0, (struct sockaddr*)&dst, + dst.sin_len); + if (ret == -1) + err(errno, "sendto"); + + return (0); +}
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