From 0b5427f93222d7a5251fc9abac47d442bfc11af1 Mon Sep 17 00:00:00 2001 From: ambrisko Date: Tue, 9 Apr 2002 19:13:43 +0000 Subject: Better handle the case with a network that drops packets by retrying with a back off. This was discovered when Luigi sent me code to handle this for Etherboot. The Etherboot patch worked okay but FreeBSD's tftpd had trouble handling it and would fail to transfer the file since it would abort on send and not retry. Submitted by: luigi MFC after: 1 week --- libexec/tftpd/tftpd.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'libexec/tftpd') diff --git a/libexec/tftpd/tftpd.c b/libexec/tftpd/tftpd.c index 7192866..057a3bd 100644 --- a/libexec/tftpd/tftpd.c +++ b/libexec/tftpd/tftpd.c @@ -576,9 +576,19 @@ xmitfile(struct formats *pf) (void)setjmp(timeoutbuf); send_data: - if (send(peer, dp, size + 4, 0) != size + 4) { - syslog(LOG_ERR, "write: %m"); - goto abort; + { + int i, t = 1; + for (i = 0; ; i++){ + if (send(peer, dp, size + 4, 0) != size + 4) { + sleep(t); + t = (t < 32) ? t<< 1 : t; + if (i >= 12) { + syslog(LOG_ERR, "write: %m"); + goto abort; + } + } + break; + } } read_ahead(file, pf->f_convert); for ( ; ; ) { -- cgit v1.1