Date: Thu, 24 Jul 2008 14:03:33 -0700 (PDT) From: Kian Mohageri <kian.mohageri@gmail.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/125940: connect(2) returning -1, errno unset Message-ID: <200807242103.m6OL3XsK062925@dev.housing.wwu.edu> Resent-Message-ID: <200807242130.m6OLU2Kc081245@freefall.freebsd.org>
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>Number: 125940
>Category: kern
>Synopsis: connect(2) returning -1, errno unset
>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: Thu Jul 24 21:30:02 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Kian Mohageri
>Release: FreeBSD 7.0-RELEASE-p3 i386
>Organization:
>Environment:
System: FreeBSD dev.housing.wwu.edu 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Mon Jul 14 18:32:03 PDT 2008 root@dev.housing.wwu.edu:/usr/obj/usr/src/sys/GENERIC i386
>Description:
Using FreeTDS 0.82 I ran into this issue. For some reason, the connection is failing (not sure why still). connect(2) is returning -1 to indicate failure, but errno is unset.
The relevant code from freetds-0.82 follows:
retval = connect(tds->s, (struct sockaddr *) &sin, sizeof(sin));
if (retval == 0) {
tdsdump_log(TDS_DBG_INFO2, "connection established\n");
} else {
tdsdump_log(TDS_DBG_ERROR, "tds_open_socket: connect(2) returned \"%s\"\n", strerror(sock_errno));
Debugging this further shows that retval is -1, but sock_errno (errno) is set to 0. Setting it to an arbitrary value prior to connect(2) reveals that it isn't touched at all after the failed connect(2).
>How-To-Repeat:
Not entirely sure how to repeat it in a more generic environment. This specific case is happening with php5-pdo_dblib, freetds-0.64 or freetds-0.82, and PHP via the command line.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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