Module Name: src Committed By: msaitoh Date: Mon Nov 11 08:12:35 UTC 2019
Modified Files: src/sys/net: if_loop.c Log Message: Fix IP broadcast + checksum offload problem. When a machine sends a IP broadcast packet to an Ethernet interface that the checksum offload flags are set, the packet goes through ether_output() -> looutput() and the offload flags is cleard without calculating the checksum. And then, ip_input() calculate the packet's checksum because it's csum_flags is zero. It regard as bad checksum and it's dropped because the packet's ifp is s not lo0's. Fixes this bug by passing csum_flags as "calculated and good" when IN_LOOPBACK_NEED_CHECKSUM() is false. Adviced by ryo@. This problem was seen when "routed -s" was used and the machine's interface's offload flags were set. bad checksum field of "netstat -s" was increased every 30 minutes. To generate a diff of this commit: cvs rdiff -u -r1.107 -r1.108 src/sys/net/if_loop.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.