Date: Fri, 09 Dec 2022 09:17:32 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 252596] ping to 255.255.255.255 does not set broadcast MAC Message-ID: <bug-252596-7501-0ZN04ZSgDw@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-252596-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-252596-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D252596 --- Comment #13 from Zhenlei Huang <zlei.huang@gmail.com> --- (In reply to Yuichiro NAITO from comment #11) > For example, I have 'em0' interface for IPv4. > Set a route entry as 'route add 255.255.255.255 -iface em0'. > Then 'ping 255.255.255.255' works as I expected. Found an interesting bug, the ICMP request is duplicated (and hence the duplicated ICMP reply). ``` # route add 255.255.255.255 -iface em0 # ping -c1 255.255.255.255=20 ``` The tcpdump session: ``` # tcpdump -nvei em0 'icmp' 11:16:47.097435 00:0c:29:73:4f:98 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 8264, offset 0, flags [none], proto ICMP (1= ), length 84) 192.168.117.154 > 255.255.255.255: ICMP echo request, id 50203, seq 0, length 64 11:16:47.097476 00:0c:29:73:4f:98 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 8264, offset 0, flags [none], proto ICMP (1= ), length 84) 192.168.117.154 > 255.255.255.255: ICMP echo request, id 50203, seq 0, length 64 11:16:47.097688 00:50:56:c0:00:08 > 00:0c:29:73:4f:98, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 64, id 61857, offset 0, flags [none], proto ICMP (= 1), length 84) 192.168.117.1 > 192.168.117.154: ICMP echo reply, id 50203, seq 0, leng= th 64 11:16:47.097692 00:50:56:f2:7d:1e > 00:0c:29:73:4f:98, ethertype IPv4 (0x08= 00), length 98: (tos 0x0, ttl 128, id 2139, offset 0, flags [none], proto ICMP (= 1), length 84) 192.168.117.2 > 192.168.117.154: ICMP echo reply, id 50203, seq 0, leng= th 64 ``` --=20 You are receiving this mail because: You are the assignee for the bug.=
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