commit 47fb0e826dd8c345d9034fda75c3238488a4690c
author Ben Schwartz <bemasc@google.com> Wed Jan 31 13:35:03 2018 -0500
committer Ben Schwartz <bemasc@google.com> Tue Feb 27 23:30:34 2018 +0000
tree 6a3268a1b65a42a98e7318bc8071368f254bf40a
parent fb56e048971e9955f902f2036299af726c02beab

Reduce max DNS response from 64K to 8K

No reasonable response is larger than about 4K, and this should reduce the ability of misbehaving DNS servers to waste system resources.

Test: Integration tests pass
Change-Id: I43da94f57f9b376d08a1b176e0aedb6720148833

libc/dns/net/gethnamaddr.c

diff --git a/libc/dns/net/gethnamaddr.c b/libc/dns/net/gethnamaddr.c
index 7118a29..7589380 100644
--- a/libc/dns/net/gethnamaddr.c
+++ b/libc/dns/net/gethnamaddr.c
@@ -127,7 +127,7 @@
 	.uid = NET_CONTEXT_INVALID_UID
 };
 
-#define	MAXPACKET	(64*1024)
+#define	MAXPACKET	(8*1024)
 
 typedef union {
     HEADER hdr;