Re: UDP implementation and the MSG_MORE flag

2021-01-28 Thread Oliver Graute
On 27/01/21, Willem de Bruijn wrote: > On Wed, Jan 27, 2021 at 9:53 PM Willem de Bruijn > wrote: > > > > On Tue, Jan 26, 2021 at 10:25 PM Willem de Bruijn > > wrote: > > > > > > On Tue, Jan 26, 2021 at 5:00 PM Willem de Bruijn > > > wrote: > > > > > > > > On Tue, Jan 26, 2021 at 4:54 PM Willem d

Re: UDP implementation and the MSG_MORE flag

2021-01-27 Thread Willem de Bruijn
On Wed, Jan 27, 2021 at 9:53 PM Willem de Bruijn wrote: > > On Tue, Jan 26, 2021 at 10:25 PM Willem de Bruijn > wrote: > > > > On Tue, Jan 26, 2021 at 5:00 PM Willem de Bruijn > > wrote: > > > > > > On Tue, Jan 26, 2021 at 4:54 PM Willem de Bruijn > > > wrote: > > > > > > > > On Tue, Jan 26, 20

Re: UDP implementation and the MSG_MORE flag

2021-01-27 Thread Willem de Bruijn
On Tue, Jan 26, 2021 at 10:25 PM Willem de Bruijn wrote: > > On Tue, Jan 26, 2021 at 5:00 PM Willem de Bruijn > wrote: > > > > On Tue, Jan 26, 2021 at 4:54 PM Willem de Bruijn > > wrote: > > > > > > On Tue, Jan 26, 2021 at 9:58 AM Oliver Graute > > > wrote: > > > > > > > > Hello, > > > > > > >

Re: UDP implementation and the MSG_MORE flag

2021-01-27 Thread Willem de Bruijn
On Tue, Jan 26, 2021 at 4:54 PM Willem de Bruijn wrote: > > On Tue, Jan 26, 2021 at 9:58 AM Oliver Graute wrote: > > > > Hello, > > > > we observe some unexpected behavior in the UDP implementation of the > > linux kernel. > > > > Some UDP packets send via the loopback interface are dropped in th

Re: UDP implementation and the MSG_MORE flag

2021-01-27 Thread Willem de Bruijn
On Tue, Jan 26, 2021 at 9:58 AM Oliver Graute wrote: > > Hello, > > we observe some unexpected behavior in the UDP implementation of the > linux kernel. > > Some UDP packets send via the loopback interface are dropped in the > kernel on the receive side when using sendto with the MSG_MORE flag. >

Re: UDP implementation and the MSG_MORE flag

2021-01-26 Thread Willem de Bruijn
On Tue, Jan 26, 2021 at 5:00 PM Willem de Bruijn wrote: > > On Tue, Jan 26, 2021 at 4:54 PM Willem de Bruijn > wrote: > > > > On Tue, Jan 26, 2021 at 9:58 AM Oliver Graute > > wrote: > > > > > > Hello, > > > > > > we observe some unexpected behavior in the UDP implementation of the > > > linux

UDP implementation and the MSG_MORE flag

2021-01-26 Thread Oliver Graute
Hello, we observe some unexpected behavior in the UDP implementation of the linux kernel. Some UDP packets send via the loopback interface are dropped in the kernel on the receive side when using sendto with the MSG_MORE flag. Every drop increases the InCsumErrors in /proc/self/net/snmp. Some exa