Hi,
I noticed an exceptional large UDP netstat counter today:
$ netstat -s -p udp
udp:
85251 datagrams received
0 with incomplete header
0 with bad data length field
72917 with bad checksum
0 with no checksum
188310 input packets software-checksummed
155001 output packets software-checksummed
6189 dropped due to no socket
14484 broadcast/multicast datagrams dropped due to no socket
0 dropped due to missing IPsec protection
0 dropped due to full socket buffers
**
18446744073709543277 delivered
**
72024 datagrams output
67498 missed PCB cache
According to http://grok.qc.to/xref/openbsd/usr.bin/netstat/inet.c#413,
delivered is
u_long delivered;
...
delivered = udpstat.udps_ipackets - udpstat.udps_hdrops -
udpstat.udps_badlen - udpstat.udps_badsum -
udpstat.udps_noport - udpstat.udps_noportbcast -
udpstat.udps_fullsock;
Which is in my case:
udps_ipackets = 85251 datagrams received
udps_hdrops = 0 with incomplete header
udps_badlen = 0 with bad data length field
udps_badsum = 72917 with bad checksum
udps_noport = 6189 dropped due to no socket
udps_noportbcast = 14484 broadcast/multicast datagrams dropped due to no socket
udps_fullsock = 0 dropped due to full socket buffers
So delivered is (signed) -8339.
This doesn't look right. Should I be worried? Is that a bug?
PS: OpenBSD puffy.example.tld 5.5 GENERIC.MP#0 amd64
