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authorPatrick McHardy <kaber@trash.net>2010-04-13 09:03:23 +0400
committerDavid S. Miller <davem@davemloft.net>2010-04-14 01:49:34 +0400
commitf0ad0860d01e47a3ffd220564c5c653b3afbe962 (patch)
tree91b69423f472b934daa2c18ae3b7ba065b7c7898 /include/linux/mroute.h
parent0c12295a741d3186987f96f518cfbdaf01abb087 (diff)
downloadlinux-f0ad0860d01e47a3ffd220564c5c653b3afbe962.tar.xz
ipv4: ipmr: support multiple tables
This patch adds support for multiple independant multicast routing instances, named "tables". Userspace multicast routing daemons can bind to a specific table instance by issuing a setsockopt call using a new option MRT_TABLE. The table number is stored in the raw socket data and affects all following ipmr setsockopt(), getsockopt() and ioctl() calls. By default, a single table (RT_TABLE_DEFAULT) is created with a default routing rule pointing to it. Newly created pimreg devices have the table number appended ("pimregX"), with the exception of devices created in the default table, which are named just "pimreg" for compatibility reasons. Packets are directed to a specific table instance using routing rules, similar to how regular routing rules work. Currently iif, oif and mark are supported as keys, source and destination addresses could be supported additionally. Example usage: - bind pimd/xorp/... to a specific table: uint32_t table = 123; setsockopt(fd, IPPROTO_IP, MRT_TABLE, &table, sizeof(table)); - create routing rules directing packets to the new table: # ip mrule add iif eth0 lookup 123 # ip mrule add oif eth0 lookup 123 Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mroute.h')
-rw-r--r--include/linux/mroute.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/mroute.h b/include/linux/mroute.h
index 7ff6c77d6008..fa04b246c9ae 100644
--- a/include/linux/mroute.h
+++ b/include/linux/mroute.h
@@ -27,7 +27,8 @@
#define MRT_DEL_MFC (MRT_BASE+5) /* Delete a multicast forwarding entry */
#define MRT_VERSION (MRT_BASE+6) /* Get the kernel multicast version */
#define MRT_ASSERT (MRT_BASE+7) /* Activate PIM assert mode */
-#define MRT_PIM (MRT_BASE+8) /* enable PIM code */
+#define MRT_PIM (MRT_BASE+8) /* enable PIM code */
+#define MRT_TABLE (MRT_BASE+9) /* Specify mroute table ID */
#define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */
#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)