Package: avahi-daemon
Version: 0.6.23-3lenny1
Severity: wishlist
Tags: patch
For lans with a lot of mDNS/DNS-SD services running, avahi seems to be
unable to keep track of all of them, and avahi-browse starts throwing
errors like:
> Failed to resolve service 'pu...@alanine' of type '_pulse-server._tcp' in
> domain 'local': Too many objects
> Failed to resolve service 'pu...@leucine' of type '_pulse-server._tcp' in
> domain 'local': Too many objects
> Failed to resolve service 'pu...@unagipie' of type '_pulse-server._tcp' in
> domain 'local': Too many objects
> Failed to resolve service 'pu...@tupaia' of type '_pulse-server._tcp' in
> domain 'local': Too many objects
> Failed to resolve service 'pu...@lime' of type '_pulse-server._tcp' in domain
> 'local': Too many objects
> Failed to resolve service 'pu...@gallus' of type '_pulse-server._tcp' in
> domain 'local': Too many objects
This seems to have been discussed in detail here:
http://www.mail-archive.com/av...@lists.freedesktop.org/msg01487.html
and the solution the guy in the linked message solution suggests:
> Original Parameters:
>
> AVAHI_CACHE_ENTRIES_MAX = 500
> OBJECTS_PER_CLIENT_MAX = 500
>
> Changed Parameters:
>
> AVAHI_CACHE_ENTRIES_MAX = 6000
> OBJECTS_PER_CLIENT_MAX = 4000
Seems to work perfectly, without any bad side effects (I suppose
avahi-daemon's probably taking more ram than it used to, but this
hardly seems excessive or risking DOS). I realize it's a judgement
call perhaps best left to the upstream avahi guys, but a /24 subnet
can go over their predefined limits pretty easily, and lacking runtime
parameters to set this, it seems that this limit should probably be
higher. For example only half of our 150-ish IPs use avahi, and yet we
seem to have gone over their limit.
For reference I've attached a patch that makes the changes described
in that listserv post.
-- System Information:
Debian Release: 5.0.3
APT prefers stable
APT policy: (800, 'stable'), (600, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.30-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages avahi-daemon depends on:
ii adduser 3.110 add and remove users and groups
ii bind9-host [host] 1:9.5.1.dfsg.P3-1 Version of 'host' bundled with BIN
ii dbus 1.2.1-5 simple interprocess messaging syst
ii libavahi-common3 0.6.23-3lenny1 Avahi common library
ii libavahi-core5 0.6.23-3lenny1 Avahi's embeddable mDNS/DNS-SD lib
ii libc6 2.9-25 GNU C Library: Shared libraries
ii libcap2 2.11-2 support for getting/setting POSIX.
ii libdaemon0 0.14-1 lightweight C library for daemons
ii libdbus-1-3 1.2.1-5 simple interprocess messaging syst
ii libexpat1 2.0.1-4 XML parsing C library - runtime li
ii lsb-base 3.2-20 Linux Standard Base 3.2 init scrip
Versions of packages avahi-daemon recommends:
ii libnss-mdns 0.10-3 NSS module for Multicast DNS name
Versions of packages avahi-daemon suggests:
pn avahi-autoipd <none> (no description available)
-- no debconf information
diff -rupN avahi-0.6.23/avahi-core/cache.c avahi-0.6.23.bigcache/avahi-core/cache.c
--- avahi-0.6.23/avahi-core/cache.c 2008-06-18 08:13:44.000000000 +0900
+++ avahi-0.6.23.bigcache/avahi-core/cache.c 2009-11-25 19:43:07.652599500 +0900
@@ -34,7 +34,7 @@
#include "log.h"
#include "rr-util.h"
-#define AVAHI_CACHE_ENTRIES_MAX 500
+#define AVAHI_CACHE_ENTRIES_MAX 6000
static void remove_entry(AvahiCache *c, AvahiCacheEntry *e) {
AvahiCacheEntry *t;
diff -rupN avahi-0.6.23/avahi-daemon/dbus-internal.h avahi-0.6.23.bigcache/avahi-daemon/dbus-internal.h
--- avahi-0.6.23/avahi-daemon/dbus-internal.h 2008-06-18 08:13:44.000000000 +0900
+++ avahi-0.6.23.bigcache/avahi-daemon/dbus-internal.h 2009-11-25 19:42:35.493628824 +0900
@@ -46,7 +46,7 @@ typedef struct AsyncServiceResolverInfo
typedef struct RecordBrowserInfo RecordBrowserInfo;
#define CLIENTS_MAX 256
-#define OBJECTS_PER_CLIENT_MAX 250
+#define OBJECTS_PER_CLIENT_MAX 4000
#define ENTRIES_PER_ENTRY_GROUP_MAX 20
struct EntryGroupInfo {
