Messages in this thread | | | Subject | Re: Seeing TCP socket options (nodelay, cork, etc) in Linux procfs or elsewhere? | From | Eric Dumazet <> | Date | Mon, 15 Mar 2010 17:20:31 +0100 |
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Le lundi 15 mars 2010 à 15:49 +0000, MacCana, Mike a écrit : > Hi kernel folks, > > I was wondering if there was a standard location to see TCP socket > options (eg, nodelay, cork, etc), perhaps via procfs or some other > means? I'd like to check whether arbitrary apps (for which I don't have > code) are using particular TCP options. > > Wandering round /proc/net hasn't turned up anything yet, and after a > quick: > socket.setsockopt(0, 1, 1) > to enable NODELAY I can't see any obvious difference in procfs or > netstat output (where other Unixes seem to put this info). hat's the > best way to see TCP options on sockets created by others' code? >
There is limited support given by ss command (part of iproute2) :
ss -emoi
ESTAB 0 0 55.225.18.5:4900 55.225.18.5:50000 uid:501 ino:135421 sk:c3b405c0 mem:(r0,w0,f4096,t0) ts bic wscale:6,6 rto:201 rtt:1/0.5 ato:40 cwnd:3 send 393.2Mbps rcv_space:32768
But CORK flag is not exported yet (its usually a volatile flag, at least with Apache server)
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