diff --git a/tests/sys/netpfil/pf/ether.sh b/tests/sys/netpfil/pf/ether.sh index 7fd55a5d78b5..0fe5069cf74c 100644 --- a/tests/sys/netpfil/pf/ether.sh +++ b/tests/sys/netpfil/pf/ether.sh @@ -1,698 +1,695 @@ # $FreeBSD$ # # SPDX-License-Identifier: BSD-2-Clause-FreeBSD # # Copyright © 2021. Rubicon Communications, LLC (Netgate). 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. . $(atf_get_srcdir)/utils.subr atf_test_case "mac" "cleanup" mac_head() { atf_set descr 'Test MAC address filtering' atf_set require.user root } mac_body() { pft_init epair=$(vnet_mkepair) epair_a_mac=$(ifconfig ${epair}a ether | awk '/ether/ { print $2; }') ifconfig ${epair}a 192.0.2.1/24 up vnet_mkjail alcatraz ${epair}b jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up pft_set_rules alcatraz \ "ether block from ${epair_a_mac}" atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 # Now enable. Ping should fail. jexec alcatraz pfctl -e atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Should still fail for 'to' pft_set_rules alcatraz \ "ether block to ${epair_a_mac}" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Succeeds if we block a different MAC address pft_set_rules alcatraz \ "ether block to 00:01:02:03:04:05" atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 # Should still fail for 'to', even if it's in a list pft_set_rules alcatraz \ "ether block to { ${epair_a_mac}, 00:01:02:0:04:05 }" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Now try this with an interface specified pft_set_rules alcatraz \ "ether block on ${epair}b from ${epair_a_mac}" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Wrong interface should not match pft_set_rules alcatraz \ "ether block on ${epair}a from ${epair_a_mac}" atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 # Test negation pft_set_rules alcatraz \ "ether block in on ${epair}b from ! ${epair_a_mac}" atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 pft_set_rules alcatraz \ "ether block out on ${epair}b to ! ${epair_a_mac}" atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 # Block everything not us pft_set_rules alcatraz \ "ether block out on ${epair}b to { ! ${epair_a_mac} }" atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 # Block us now pft_set_rules alcatraz \ "ether block out on ${epair}b to { ! 00:01:02:03:04:05 }" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Block with a masked address pft_set_rules alcatraz \ "ether block out on ${epair}b to { ! 00:01:02:03:00:00/32 }" jexec alcatraz pfctl -se atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 epair_prefix=$(echo $epair_a_mac | cut -c-8) pft_set_rules alcatraz \ "ether block out on ${epair}b to { ${epair_prefix}:00:00:00/24 }" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 pft_set_rules alcatraz \ "ether block out on ${epair}b to { ${epair_prefix}:00:00:00&ff:ff:ff:00:00:00 }" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Check '-F ethernet' works jexec alcatraz pfctl -F ethernet atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 } mac_cleanup() { pft_cleanup } atf_test_case "proto" "cleanup" proto_head() { atf_set descr 'Test EtherType filtering' atf_set require.user root } proto_body() { pft_init epair=$(vnet_mkepair) epair_a_mac=$(ifconfig ${epair}a ether | awk '/ether/ { print $2; }') ifconfig ${epair}a 192.0.2.1/24 up vnet_mkjail alcatraz ${epair}b jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up pft_set_rules alcatraz \ "ether block proto 0x0810" jexec alcatraz pfctl -e atf_check -s exit:0 -o ignore ping -c 1 -t 1 192.0.2.2 # Block IP pft_set_rules alcatraz \ "ether block proto 0x0800" atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 # Block ARP pft_set_rules alcatraz \ "ether block proto 0x0806" arp -d 192.0.2.2 atf_check -s exit:2 -o ignore ping -c 1 -t 1 192.0.2.2 } proto_cleanup() { pft_cleanup } atf_test_case "direction" "cleanup" direction_head() { atf_set descr 'Test directionality of ether rules' atf_set require.user root atf_set require.progs jq } direction_body() { pft_init epair=$(vnet_mkepair) epair_a_mac=$(ifconfig ${epair}a ether | awk '/ether/ { print $2; }') epair_b_mac=$(ifconfig ${epair}b ether | awk '/ether/ { print $2; }') ifconfig ${epair}a 192.0.2.1/24 up vnet_mkjail alcatraz ${epair}b jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up pft_set_rules alcatraz \ "ether block in proto 0x0806" jexec alcatraz pfctl -e arp -d 192.0.2.2 jexec alcatraz arp -d 192.0.2.1 # We don't allow the jail to receive ARP requests, so if we try to ping # from host to jail the host can't resolve the MAC address ping -c 1 -t 1 192.0.2.2 mac=$(arp -an --libxo json \ | jq '."arp"."arp-cache"[] | select(."ip-address"=="192.0.2.2")."mac-address"') atf_check_not_equal "$mac" "$epair_b_mac" # Clear ARP table again arp -d 192.0.2.2 jexec alcatraz arp -d 192.0.2.1 # However, we allow outbound ARP, so the host will learn our MAC if the # jail tries to ping jexec alcatraz ping -c 1 -t 1 192.0.2.1 mac=$(arp -an --libxo json \ | jq '."arp"."arp-cache"[] | select(."ip-address"=="192.0.2.2")."mac-address"') atf_check_equal "$mac" "$epair_b_mac" # Now do the same, but with outbound ARP blocking pft_set_rules alcatraz \ "ether block out proto 0x0806" # Clear ARP table again arp -d 192.0.2.2 jexec alcatraz arp -d 192.0.2.1 # The jail can't send ARP requests to us, so we'll never learn our MAC # address jexec alcatraz ping -c 1 -t 1 192.0.2.1 mac=$(jexec alcatraz arp -an --libxo json \ | jq '."arp"."arp-cache"[] | select(."ip-address"=="192.0.2.1")."mac-address"') atf_check_not_equal "$mac" "$epair_a_mac" } direction_cleanup() { pft_cleanup } atf_test_case "captive" "cleanup" captive_head() { atf_set descr 'Test a basic captive portal-like setup' atf_set require.user root } captive_body() { # Host is client, jail 'gw' is the captive portal gateway, jail 'srv' # is a random (web)server. We use the echo protocol rather than http # for the test, because that's easier. pft_init epair_gw=$(vnet_mkepair) epair_srv=$(vnet_mkepair) epair_gw_a_mac=$(ifconfig ${epair_gw}a ether | awk '/ether/ { print $2; }') vnet_mkjail gw ${epair_gw}b ${epair_srv}a vnet_mkjail srv ${epair_srv}b ifconfig ${epair_gw}a 192.0.2.2/24 up route add -net 198.51.100.0/24 192.0.2.1 jexec gw ifconfig ${epair_gw}b 192.0.2.1/24 up jexec gw ifconfig lo0 127.0.0.1/8 up jexec gw sysctl net.inet.ip.forwarding=1 jexec gw ifconfig ${epair_srv}a 198.51.100.1/24 up jexec srv ifconfig ${epair_srv}b 198.51.100.2/24 up jexec srv route add -net 192.0.2.0/24 198.51.100.1 # Sanity check atf_check -s exit:0 -o ignore ping -c 1 -t 1 198.51.100.2 pft_set_rules gw \ "ether pass quick proto 0x0806" \ "ether pass tag captive" \ "rdr on ${epair_gw}b proto tcp to port echo tagged captive -> 127.0.0.1 port echo" jexec gw pfctl -e # ICMP should still work, because we don't redirect it. atf_check -s exit:0 -o ignore ping -c 1 -t 1 198.51.100.2 # Run the echo server only on the gw, so we know we've redirectly # correctly if we get an echo message. jexec gw /usr/sbin/inetd $(atf_get_srcdir)/echo_inetd.conf # Confirm that we're getting redirected atf_check -s exit:0 -o match:"^foo$" -x "echo foo | nc -N 198.51.100.2 7" jexec gw killall inetd # Now pretend we've authenticated, so add the client's MAC address pft_set_rules gw \ "ether pass quick proto 0x0806" \ "ether pass quick from ${epair_gw_a_mac}" \ "ether pass tag captive" \ "rdr on ${epair_gw}b proto tcp to port echo tagged captive -> 127.0.0.1 port echo" # No redirect, so failure. atf_check -s exit:1 -x "echo foo | nc -N 198.51.100.2 7" # Start a server in srv jexec srv /usr/sbin/inetd $(atf_get_srcdir)/echo_inetd.conf # And now we can talk to that one. atf_check -s exit:0 -o match:"^foo$" -x "echo foo | nc -N 198.51.100.2 7" } captive_cleanup() { pft_cleanup } atf_test_case "captive_long" "cleanup" captive_long_head() { atf_set descr 'More complex captive portal setup' atf_set require.user root } captive_long_body() { # Host is client, jail 'gw' is the captive portal gateway, jail 'srv' # is a random (web)server. We use the echo protocol rather than http # for the test, because that's easier. dummynet_init epair_gw=$(vnet_mkepair) epair_srv=$(vnet_mkepair) epair_gw_a_mac=$(ifconfig ${epair_gw}a ether | awk '/ether/ { print $2; }') vnet_mkjail gw ${epair_gw}b ${epair_srv}a vnet_mkjail srv ${epair_srv}b ifconfig ${epair_gw}a 192.0.2.2/24 up route add -net 198.51.100.0/24 192.0.2.1 jexec gw ifconfig ${epair_gw}b 192.0.2.1/24 up jexec gw ifconfig lo0 127.0.0.1/8 up jexec gw sysctl net.inet.ip.forwarding=1 jexec gw ifconfig ${epair_srv}a 198.51.100.1/24 up jexec srv ifconfig ${epair_srv}b 198.51.100.2/24 up jexec srv route add -net 192.0.2.0/24 198.51.100.1 jexec gw dnctl pipe 1 config bw 300KByte/s # Sanity check atf_check -s exit:0 -o ignore ping -c 1 -t 1 198.51.100.2 pft_set_rules gw \ "ether anchor \"captiveportal\" on { ${epair_gw}b } {" \ "ether pass quick proto { 0x0806, 0x8035, 0x888e, 0x88c7, 0x8863, 0x8864 }" \ "ether pass tag \"captive\"" \ "}" \ "rdr on ${epair_gw}b proto tcp to port daytime tagged captive -> 127.0.0.1 port echo" jexec gw pfctl -e # ICMP should still work, because we don't redirect it. atf_check -s exit:0 -o ignore ping -c 1 -t 1 198.51.100.2 jexec gw /usr/sbin/inetd -p gw.pid $(atf_get_srcdir)/echo_inetd.conf jexec srv /usr/sbin/inetd -p srv.pid $(atf_get_srcdir)/daytime_inetd.conf echo foo | nc -N 198.51.100.2 13 # Confirm that we're getting redirected atf_check -s exit:0 -o match:"^foo$" -x "echo foo | nc -N 198.51.100.2 13" # Now update the rules to allow our client to pass without redirect pft_set_rules gw \ "ether anchor \"captiveportal\" on { ${epair_gw}b } {" \ "ether pass quick proto { 0x0806, 0x8035, 0x888e, 0x88c7, 0x8863, 0x8864 }" \ "ether pass quick from { ${epair_gw_a_mac} } dnpipe 1" \ "ether pass tag \"captive\"" \ "}" \ "rdr on ${epair_gw}b proto tcp to port daytime tagged captive -> 127.0.0.1 port echo" # We're not being redirected and get datime information now atf_check -s exit:0 -o match:"^(Mon|Tue|Wed|Thu|Fri|Sat|Sun)" -x "echo foo | nc -N 198.51.100.2 13" jexec gw killall inetd jexec srv killall inetd } captive_long_cleanup() { pft_cleanup } atf_test_case "dummynet" "cleanup" dummynet_head() { atf_set descr 'Test dummynet for L2 traffic' atf_set require.user root } dummynet_body() { pft_init if ! kldstat -q -m dummynet; then atf_skip "This test requires dummynet" fi epair=$(vnet_mkepair) vnet_mkjail alcatraz ${epair}b ifconfig ${epair}a 192.0.2.1/24 up jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up # Sanity check atf_check -s exit:0 -o ignore ping -i .1 -c 3 -s 1200 192.0.2.2 jexec alcatraz dnctl pipe 1 config bw 30Byte/s jexec alcatraz pfctl -e pft_set_rules alcatraz \ "ether pass in dnpipe 1" # Ensure things don't break if non-IP(v4/v6) traffic hits dummynet arp -d 192.0.2.2 # single ping succeeds just fine atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 # Saturate the link ping -i .1 -c 5 -s 1200 192.0.2.2 # We should now be hitting the limits and get this packet dropped. atf_check -s exit:2 -o ignore ping -c 1 -s 1200 192.0.2.2 # We can now also dummynet outbound traffic! pft_set_rules alcatraz \ "ether pass out dnpipe 1" # We should still be hitting the limits and get this packet dropped. atf_check -s exit:2 -o ignore ping -c 1 -s 1200 192.0.2.2 } dummynet_cleanup() { pft_cleanup } atf_test_case "anchor" "cleanup" anchor_head() { atf_set descr 'Test ether anchors' atf_set require.user root } anchor_body() { pft_init epair=$(vnet_mkepair) epair_a_mac=$(ifconfig ${epair}a ether | awk '/ether/ { print $2; }') vnet_mkjail alcatraz ${epair}b ifconfig ${epair}a 192.0.2.1/24 up jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up # Sanity check atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 jexec alcatraz pfctl -e pft_set_rules alcatraz \ "ether anchor \"foo\" in on lo0 {" \ "ether block" \ "}" # That only filters on lo0, so we should still be able to pass traffic atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 pft_set_rules alcatraz \ "ether block in" \ "ether anchor \"foo\" in on ${epair}b {" \ "ether pass" \ "}" atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 pft_set_rules alcatraz \ "ether pass" \ "ether anchor \"bar\" in on ${epair}b {" \ "ether block" \ "}" atf_check -s exit:2 -o ignore ping -c 1 -t 2 192.0.2.2 pft_set_rules alcatraz \ "ether block in" \ "ether anchor \"baz\" on ${epair}b {" \ "ether pass in from 01:02:03:04:05:06" \ "}" \ "ether pass in from ${epair_a_mac}" atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 atf_check -s exit:0 -o match:'baz' jexec alcatraz pfctl -sA } anchor_cleanup() { pft_cleanup } atf_test_case "ip" "cleanup" ip_head() { atf_set descr 'Test filtering based on IP source/destination' atf_set require.user root } ip_body() { pft_init epair=$(vnet_mkepair) vnet_mkjail alcatraz ${epair}b ifconfig ${epair}a 192.0.2.1/24 up jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up # Sanity check atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 jexec alcatraz pfctl -e pft_set_rules alcatraz \ "ether pass" \ "ether block in l3 from 192.0.2.1" atf_check -s exit:2 -o ignore ping -c 1 192.0.2.2 # Change IP address and we can ping again ifconfig ${epair}a 192.0.2.3/24 up atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 # Test the 'to' keyword too pft_set_rules alcatraz \ "ether pass" \ "ether block out l3 to 192.0.2.3" atf_check -s exit:2 -o ignore ping -c 1 192.0.2.2 # Test table pft_set_rules alcatraz \ "table { 192.0.2.3 }" \ "ether pass" \ "ether block out l3 to " atf_check -s exit:2 -o ignore ping -c 1 192.0.2.2 } ip_cleanup() { pft_cleanup } atf_test_case "tag" "cleanup" tag_head() { atf_set descr 'Test setting tags' atf_set require.user root } tag_body() { pft_init epair=$(vnet_mkepair) vnet_mkjail alcatraz ${epair}b ifconfig ${epair}a 192.0.2.1/24 up jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up # Sanity check atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 jexec alcatraz pfctl -e pft_set_rules alcatraz \ "ether pass in tag foo" \ "block in tagged foo" atf_check -s exit:2 -o ignore ping -c 1 192.0.2.2 pft_set_rules alcatraz \ "ether pass in tag bar" \ "block in tagged foo" # Still passes when tagged differently atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 } tag_cleanup() { pft_cleanup } atf_test_case "match_tag" "cleanup" match_tag_head() { atf_set descr 'Test matching tags' atf_set require.user root } match_tag_body() { pft_init epair=$(vnet_mkepair) vnet_mkjail alcatraz ${epair}b ifconfig ${epair}a 192.0.2.1/24 up jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up # Sanity check atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 jexec alcatraz pfctl -e pft_set_rules alcatraz \ "ether block out tagged foo" \ "pass in proto icmp tag foo" atf_check -s exit:2 -o ignore ping -c 1 192.0.2.2 pft_set_rules alcatraz \ "ether block out tagged bar" \ "pass in proto icmp tag foo" # Still passes when tagged differently atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 } match_tag_cleanup() { pft_cleanup } atf_test_case "short_pkt" "cleanup" short_pkt_head() { atf_set descr 'Test overly short Ethernet packets' atf_set require.user root } short_pkt_body() { pft_init epair=$(vnet_mkepair) ifconfig ${epair}a 192.0.2.1/24 up vnet_mkjail alcatraz ${epair}b jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up jexec alcatraz pfctl -e pft_set_rules alcatraz \ "ether pass in" \ "ether pass out" \ "ether pass in l3 from 192.0.2.1" # Sanity check atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2 jexec alcatraz pfctl -se -v # Try sending ever shorter ping requests # BPF won't let us send anything shorter than an Ethernet header, but # that's good enough for this test - for i in `seq 46 14` - do - $(atf_get_srcdir)/pft_ether.py \ - --sendif ${epair}a \ - --to 192.0.2.2 \ - --len ${i} - done + $(atf_get_srcdir)/pft_ether.py \ + --sendif ${epair}a \ + --to 192.0.2.2 \ + --len 14-64 } short_pkt_cleanup() { pft_cleanup } atf_init_test_cases() { atf_add_test_case "mac" atf_add_test_case "proto" atf_add_test_case "direction" atf_add_test_case "captive" atf_add_test_case "captive_long" atf_add_test_case "dummynet" atf_add_test_case "anchor" atf_add_test_case "ip" atf_add_test_case "tag" atf_add_test_case "match_tag" atf_add_test_case "short_pkt" } diff --git a/tests/sys/netpfil/pf/pft_ether.py b/tests/sys/netpfil/pf/pft_ether.py index 1892e0a8f95e..4efb974f7897 100644 --- a/tests/sys/netpfil/pf/pft_ether.py +++ b/tests/sys/netpfil/pf/pft_ether.py @@ -1,67 +1,72 @@ #!/usr/bin/env python3 # # SPDX-License-Identifier: BSD-2-Clause # # Copyright © 2022. Rubicon Communications, LLC (Netgate). 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. # import argparse import logging logging.getLogger("scapy").setLevel(logging.CRITICAL) import scapy.all as sp import socket import sys PAYLOAD_MAGIC = bytes.fromhex('42c0ffee') def ping(send_if, dst_ip, length): ether = sp.Ether() ip = sp.IP(dst=dst_ip) icmp = sp.ICMP(type='echo-request') raw = sp.raw(PAYLOAD_MAGIC) req = ether / ip / icmp / raw req = req.build()[0:length] sp.sendp(req, iface=send_if, verbose=False) def main(): parser = argparse.ArgumentParser("pft_ether.py", description="Ethernet test tool") parser.add_argument('--sendif', nargs=1, required=True, help='The interface through which the packet(s) will be sent') parser.add_argument('--to', nargs=1, required=True, help='The destination IP address for the ICMP echo request') parser.add_argument('--len', nargs=1, required=True, help='The length of the packet') args = parser.parse_args() - ping(args.sendif[0], args.to[0], int(args.len[0])) + if '-' in args.len[0]: + s=args.len[0].split('-') + for i in range(int(s[0]), int(s[1]) + 1): + ping(args.sendif[0], args.to[0], i) + else: + ping(args.sendif[0], args.to[0], int(args.len[0])) if __name__ == '__main__': main()