Hello! --------------------------------------------------------------------------------- Please, even if nobody is interested in this patch or if it has no chance to get into the kernel, tell me why! ---------------------------------------------------------------------------------
I implemented a patch to control the behaviour of the kernel when setting routes
automatically
while adding a new network address.
You can select the types of routes you want to be set automatically.
This enables the user - as an example - to set all routes in the local table
automatically,
but leave the main table untouched. (This is the special case I needed.)
If you want you can disable it completly by writing.
I would like to see this in the kernel. Any comments or ideas about this?
This patch itself is very small and only adds the controlling over the IPv4
autoroutes.
Regards
Sven
--
Sven Anders <[EMAIL PROTECTED]> () Ascii Ribbon Campaign
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ANDURAS service solutions AG
Innstraße 71 - 94036 Passau - Germany
Web: www.anduras.de - Tel: +49 (0)851-4 90 50-0 - Fax: +49 (0)851-4 90 50-55
Rechtsform: Aktiengesellschaft - Sitz: Passau - Amtsgericht Passau HRB 6032
Mitglieder des Vorstands: Sven Anders, Marcus Junker, Michael Schön
Vorsitzender des Aufsichtsrats: Dipl. Kfm. Thomas Träger
--- linux-2.6.15.1/include/linux/sysctl.h Sun Jan 15 07:16:02 2006
+++ linux-2.6.15.1/include/linux/sysctl.h.patched Tue Jan 31 21:43:58 2006
@@ -390,6 +390,7 @@
NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109,
NET_TCP_CONG_CONTROL=110,
NET_TCP_ABC=111,
+ NET_IPV4_AUTO_ROUTE_CREATE=112,
};
enum {
--- linux-2.6.15.1/net/ipv4/sysctl_net_ipv4.c Sun Jan 15 07:16:02 2006
+++ linux-2.6.15.1/net/ipv4/sysctl_net_ipv4.c.patched Tue Jan 31 21:53:14 2006
@@ -18,12 +18,15 @@
#include <net/route.h>
#include <net/tcp.h>
/* From af_inet.c */
extern int sysctl_ip_nonlocal_bind;
+/* From fib_frontend.c */
+extern int sysctl_auto_route_create;
+
#ifdef CONFIG_SYSCTL
static int tcp_retr1_max = 255;
static int ip_local_port_range_min[] = { 1, 1 };
static int ip_local_port_range_max[] = { 65535, 65535 };
#endif
@@ -646,12 +649,20 @@
.strategy = &sysctl_tcp_congestion_control,
},
{
.ctl_name = NET_TCP_ABC,
.procname = "tcp_abc",
.data = &sysctl_tcp_abc,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_IPV4_AUTO_ROUTE_CREATE,
+ .procname = "ip_autoroute",
+ .data = &sysctl_auto_route_create,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{ .ctl_name = 0 }
--- linux-2.6.15.1/net/ipv4/fib_frontend.c Tue Jan 31 21:46:19 2006
+++ linux-2.6.15.1/net/ipv4/fib_frontend.c.patched Wed Feb 1 23:13:51 2006
@@ -47,6 +47,13 @@
#define FFprint(a...) printk(KERN_DEBUG a)
+/* automatically create routes? */
+#define SYSCTL_AUTO_ROUTE_LOCAL 1
+#define SYSCTL_AUTO_ROUTE_BROADCAST 2
+#define SYSCTL_AUTO_ROUTE_UNICAST 4
+#define SYSCTL_AUTO_ROUTE_ALL 7
+int sysctl_auto_route_create = SYSCTL_AUTO_ROUTE_ALL;
+
#ifndef CONFIG_IP_MULTIPLE_TABLES
#define RT_TABLE_MIN RT_TABLE_MAIN
@@ -373,6 +380,14 @@
struct rtmsg rtm;
} req;
struct kern_rta rta;
+
+ if (((type == RTN_LOCAL) &&
+ !(sysctl_auto_route_create & SYSCTL_AUTO_ROUTE_LOCAL)) ||
+ ((type == RTN_BROADCAST) &&
+ !(sysctl_auto_route_create & SYSCTL_AUTO_ROUTE_BROADCAST)) ||
+ ((type == RTN_UNICAST) &&
+ !(sysctl_auto_route_create & SYSCTL_AUTO_ROUTE_UNICAST)))
+ return;
memset(&req.rtm, 0, sizeof(req.rtm));
memset(&rta, 0, sizeof(rta));
--- linux-2.6.15.1/Documentation/networking/ip-sysctl.txt.orig Fri Feb 3 22:03:37 2006
+++ linux-2.6.15.1/Documentation/networking/ip-sysctl.txt Fri Feb 3 22:06:25 2006
@@ -27,6 +27,16 @@
The advertised MSS depends on the first hop route MTU, but will
never be lower than this setting.
+ip_autoroute - INTEGER
+ Control the behaviour of setting automatic routes (when adding an
+ ip address). Implemented as a bitmask.
+
+ 1 = Add local routes (in local table)
+ 2 = Add broadcast routes (in local table)
+ 4 = Add unicast route (in main table)
+
+ default 7 - Set all routes
+
IP Fragmentation:
ipfrag_high_thresh - INTEGER
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