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Timeout when an expected accept does not happen after all.

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This gets rids of dozens of hanging ftpd's because some broken
pc implementation `forgets' to open a passive connection.
Obtained from: Wietse Venema
This commit is contained in:
Guido van Rooij 1995-11-29 19:52:30 +00:00
parent 8e050b2e86
commit d6ed3c374d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=12532
1 changed files with 11 additions and 3 deletions
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14
libexec/ftpd/ftpd.c
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@ -30,7 +30,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ftpd.c,v 1.11 1995/08/05 19:12:05 pst Exp $
* $Id: ftpd.c,v 1.12 1995/08/28 21:30:49 mpp Exp $
*/
#ifndef lint
@ -922,9 +922,17 @@ dataconn(name, size, mode)
if (pdata >= 0) {
struct sockaddr_in from;
int s, fromlen = sizeof(from);
struct timeval timeout;
fd_set set;
s = accept(pdata, (struct sockaddr *)&from, &fromlen);
if (s < 0) {
FD_ZERO(&set);
FD_SET(pdata, &set);
timeout.tv_usec = 0;
timeout.tv_sec = 120;
if (select(pdata+1, &set, (fd_set *) 0, (fd_set *) 0, &timeout) == 0 ||
(s = accept(pdata, (struct sockaddr *) &from, &fromlen)) < 0) {
reply(425, "Can't open data connection.");
(void) close(pdata);
pdata = -1;