From 1c21ad3ad0a5cd10d1f8cf9c7c5f5b28ae558103 Mon Sep 17 00:00:00 2001
From: Patrick McHardy <kaber@trash.net>
Date: Tue, 13 Apr 2010 17:03:47 +0200
Subject: [PATCH] ip: add support for multicast rules
Signed-off-by: Patrick McHardy <kaber@trash.net>
---
include/linux/fib_rules.h | 8 ++++++++
ip/ip.c | 3 ++-
ip/ip_common.h | 1 +
ip/iprule.c | 12 ++++++++++++
4 files changed, 23 insertions(+), 1 deletions(-)
@@ -15,6 +15,14 @@
/* try to find source address in routing lookups */
#define FIB_RULE_FIND_SADDR 0x00010000
+/* fib_rules families. values up to 127 are reserved for real address
+ * families, values above 128 may be used arbitrarily.
+ */
+#define FIB_RULES_IPV4 AF_INET
+#define FIB_RULES_IPV6 AF_INET6
+#define FIB_RULES_DECNET AF_DECnet
+#define FIB_RULES_IPMR 128
+
struct fib_rule_hdr {
__u8 family;
__u8 dst_len;
@@ -42,7 +42,7 @@ static void usage(void)
"Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n"
" ip [ -force ] -batch filename\n"
"where OBJECT := { link | addr | addrlabel | route | rule | neigh | ntable |\n"
-" tunnel | tuntap | maddr | mroute | monitor | xfrm }\n"
+" tunnel | tuntap | maddr | mroute | mrule | monitor | xfrm }\n"
" OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n"
" -f[amily] { inet | inet6 | ipx | dnet | link } |\n"
" -o[neline] | -t[imestamp] | -b[atch] [filename] |\n"
@@ -76,6 +76,7 @@ static const struct cmd {
{ "monitor", do_ipmonitor },
{ "xfrm", do_xfrm },
{ "mroute", do_multiroute },
+ { "mrule", do_multirule },
{ "help", do_help },
{ 0 }
};
@@ -37,6 +37,7 @@ extern int do_iplink(int argc, char **argv);
extern int do_ipmonitor(int argc, char **argv);
extern int do_multiaddr(int argc, char **argv);
extern int do_multiroute(int argc, char **argv);
+extern int do_multirule(int argc, char **argv);
extern int do_xfrm(int argc, char **argv);
static inline int rtm_get_table(struct rtmsg *r, struct rtattr **tb)
@@ -436,3 +436,15 @@ int do_iprule(int argc, char **argv)
exit(-1);
}
+int do_multirule(int argc, char **argv)
+{
+ if (preferred_family == AF_UNSPEC ||
+ preferred_family == AF_INET)
+ preferred_family = FIB_RULES_IPMR;
+ else {
+ fprintf(stderr, "Multicast rules are only supported for IPv4\n");
+ exit(-1);
+ }
+
+ return do_iprule(argc, argv);
+}
--
1.7.0.4