Date: Sat, 26 Jan 2002 10:55:03 -0800 (PST) From: Boyan Gadjev <bgadjev@verio.net> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/34307: accept() fails after ECONNABORTED Message-ID: <200201261855.g0QIt3K19871@freefall.freebsd.org>
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>Number: 34307
>Category: misc
>Synopsis: accept() fails after ECONNABORTED
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Jan 26 11:00:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Boyan Gadjev
>Release: 4.5-RC
>Organization:
NTT/Verio
>Environment:
FreeBSD mail01a.rapidsite.net 4.5-RC FreeBSD 4.5-RC #0: Tue Jan 22 17:20:15 EST 2002 root@freebsd.boca.verio.net:/usr/src/sys/compile/VERIO i386
>Description:
s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)
sockopt = 1; sockoptlen = 4;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&sockopt, sockoptlen);
sockopt = 1; sockoptlen = 4;
setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *)&sockopt, sockoptlen);
bind() ;
listen(s,200) /* i have kern.ipc.somaxconn = 256 */
while(1) {
confd = accept (s, (struct sockaddr *) &server, &sockaddr_len);
if (confd < 0) {
myerrno = errno;
if ((myerrno != EWOULDBLOCK) && (myerrno != EAGAIN)) break;
else {
continue;
}
.............
.................
}
}
And here is the problem. If I ignore ECONNABORTED like I do for EAGAIN
and EWOULDBLOCK then every accept() after that would NOT change 'server'
meaning that I am not able to get the remote address. I have to
actually close and recreate the socket before I use accept() again.
I tried non-blocking and blocking socket and the result is the same.
Load on the box gets betw4een 4-7 and I have thousands connections per second
to that port.
>How-To-Repeat:
Create a small program that listens on a port and hit the port with many connections
(connect write close) till you get ECONNABORTED on the server side.
>Fix:
the only one i thought of was to recreate the socket after ECONNABORTED.
>Release-Note:
>Audit-Trail:
>Unformatted:
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