From 8a95d324b4c6c524bc8d3c3afb16fb83fc0f79d9 Mon Sep 17 00:00:00 2001 From: "Eric S. Raymond" Date: Tue, 14 Oct 1997 05:50:02 +0000 Subject: Use UDP for DNS queries to avoid diald problems. svn path=/trunk/; revision=1511 --- fetchmail.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'fetchmail.c') diff --git a/fetchmail.c b/fetchmail.c index 66c4331a..369e1fd4 100644 --- a/fetchmail.c +++ b/fetchmail.c @@ -369,7 +369,17 @@ int main (int argc, char **argv) * reflect the status of that transaction. */ do { -#ifdef HAVE_RES_SEARCH +#if defined(HAVE_RES_SEARCH) && defined(USE_TCPIP_FOR_DNS) + /* + * This was an efficiency hack that backfired. The theory + * was that using TCP/IP for DNS queries would get us better + * reliability and shave off some per-UDP-packet costs. + * Unfortunately it interacted badly with diald, which effectively + * filters out DNS queries over TCP/IP for reasons having to do + * with some obscure kernel problem involving bootstrapping of + * dynamically-addressed links. I don't understand this mess + * and don't want to, so it's "See ya!" to this hack. + */ sethostent(TRUE); /* use TCP/IP for mailserver queries */ #endif /* HAVE_RES_SEARCH */ @@ -457,7 +467,7 @@ int main (int argc, char **argv) } } -#ifdef HAVE_RES_SEARCH +#if defined(HAVE_RES_SEARCH) && defined(USE_TCPIP_FOR_DNS) endhostent(); /* release TCP/IP connection to nameserver */ #endif /* HAVE_RES_SEARCH */ -- cgit v1.2.3