From 6aa4b73c463d026eb7608958ff24525a0b9cfaab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Henrik=20Grubbstr=C3=B6m=20=28Grubba=29?=
<grubba@grubba.org>
Date: Sat, 13 Jun 1998 21:31:23 +0200
Subject: [PATCH] Made rec_data() more paranoid.
Rev: lib/modules/Protocols.pmod/DNS.pmod:1.16
---
lib/modules/Protocols.pmod/DNS.pmod | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/lib/modules/Protocols.pmod/DNS.pmod b/lib/modules/Protocols.pmod/DNS.pmod
index 42a560bdc5..dbca38c7e4 100644
--- a/lib/modules/Protocols.pmod/DNS.pmod
+++ b/lib/modules/Protocols.pmod/DNS.pmod
@@ -525,14 +525,21 @@ class async_client
static private void rec_data()
{
- mapping m=udp::read();
- if(m->port != 53 || search(nameservers, m->ip) == -1) return;
- sscanf(m->data,"%2c",int id);
- object r=requests[id];
- if(!r) return;
- m_delete(requests,id);
- r->callback(r->domain,decode_res(m->data),@r->args);
- destruct(r);
+ mixed err;
+ if (err = catch {
+ mapping m=udp::read();
+ if(m->port != 53 || search(nameservers, m->ip) == -1) return;
+ sscanf(m->data,"%2c",int id);
+ object r=requests[id];
+ if(!r) return;
+ m_delete(requests,id);
+ r->callback(r->domain,decode_res(m->data),@r->args);
+ destruct(r);
+ }) {
+ werror(sprintf("DNS: Failed to read UDP packet. Connection refused?\n"
+ "%s\n",
+ describe_backtrace(err)));
+ }
}
static private void generic_get(string d,
--
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