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authorNeale Ranns <nranns@cisco.com>2017-03-11 05:55:21 -0800
committerFlorin Coras <florin.coras@gmail.com>2017-03-17 15:49:39 +0000
commit4b919a56642ccd0a44920feace872aeb5b7a62cf (patch)
tree17750f4efc80d7863b68f9cd08ab381cd00dd534 /src/vnet/fib
parentc60f557590f79b8817382bdd982825b66c4e0a73 (diff)
Attached hosts
allow this config to function: set int ip address loop0 169.254.1.1/32 (the default GW address for attached hosts) set int unnumbered af_packet0 use loop0 ('enable' IP on the host interface) ip route add 192.168.1.1/32 via af_packet0 (where to find the host) repeat for each host and host interface. Inter-host communication is throught the /32 routes. To allow this: 1 - attached host routes have the ATTACHED flag set, so the ARP code accepts then as legitimate sources 2 - unnumbered interfaces inherit the source address from the IP interface Change-Id: Ib66c5f0e848c528f79372813adc3a0c11b50717f Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/fib')
-rw-r--r--src/vnet/fib/fib_entry_src.c4
-rw-r--r--src/vnet/fib/fib_path.c7
-rw-r--r--src/vnet/fib/fib_path.h6
-rw-r--r--src/vnet/fib/fib_table.c1
-rw-r--r--src/vnet/fib/fib_types.h4
5 files changed, 22 insertions, 0 deletions
diff --git a/src/vnet/fib/fib_entry_src.c b/src/vnet/fib/fib_entry_src.c
index feb232df7f1..aa1d5a24a0f 100644
--- a/src/vnet/fib/fib_entry_src.c
+++ b/src/vnet/fib/fib_entry_src.c
@@ -946,6 +946,10 @@ fib_path_is_attached (const fib_route_path_t *rpath)
{
return (!0);
}
+ else if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED)
+ {
+ return (!0);
+ }
return (0);
}
diff --git a/src/vnet/fib/fib_path.c b/src/vnet/fib/fib_path.c
index aa545b5ed45..3ed309f328b 100644
--- a/src/vnet/fib/fib_path.c
+++ b/src/vnet/fib/fib_path.c
@@ -110,6 +110,10 @@ typedef enum fib_path_oper_attribute_t_ {
*/
FIB_PATH_OPER_ATTRIBUTE_RESOLVED,
/**
+ * The path is attached, despite what the next-hop may say.
+ */
+ FIB_PATH_OPER_ATTRIBUTE_ATTACHED,
+ /**
* The path has become a permanent drop.
*/
FIB_PATH_OPER_ATTRIBUTE_DROP,
@@ -143,6 +147,7 @@ typedef enum fib_path_oper_flags_t_ {
FIB_PATH_OPER_FLAG_RECURSIVE_LOOP = (1 << FIB_PATH_OPER_ATTRIBUTE_RECURSIVE_LOOP),
FIB_PATH_OPER_FLAG_DROP = (1 << FIB_PATH_OPER_ATTRIBUTE_DROP),
FIB_PATH_OPER_FLAG_RESOLVED = (1 << FIB_PATH_OPER_ATTRIBUTE_RESOLVED),
+ FIB_PATH_OPER_FLAG_ATTACHED = (1 << FIB_PATH_OPER_ATTRIBUTE_ATTACHED),
} __attribute__ ((packed)) fib_path_oper_flags_t;
/**
@@ -963,6 +968,8 @@ fib_path_route_flags_to_cfg_flags (const fib_route_path_t *rpath)
cfg_flags |= FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED;
if (rpath->frp_flags & FIB_ROUTE_PATH_LOCAL)
cfg_flags |= FIB_PATH_CFG_FLAG_LOCAL;
+ if (rpath->frp_flags & FIB_ROUTE_PATH_ATTACHED)
+ cfg_flags |= FIB_PATH_CFG_FLAG_ATTACHED;
return (cfg_flags);
}
diff --git a/src/vnet/fib/fib_path.h b/src/vnet/fib/fib_path.h
index 91f49d09234..14efc1ab842 100644
--- a/src/vnet/fib/fib_path.h
+++ b/src/vnet/fib/fib_path.h
@@ -63,6 +63,10 @@ typedef enum fib_path_cfg_attribute_t_ {
*/
FIB_PATH_CFG_ATTRIBUTE_RESOLVE_ATTACHED,
/**
+ * The path is attached
+ */
+ FIB_PATH_CFG_ATTRIBUTE_ATTACHED,
+ /**
* The path is a for-us path
*/
FIB_PATH_CFG_ATTRIBUTE_LOCAL,
@@ -83,6 +87,7 @@ typedef enum fib_path_cfg_attribute_t_ {
[FIB_PATH_CFG_ATTRIBUTE_RESOLVE_HOST] = "resolve-host", \
[FIB_PATH_CFG_ATTRIBUTE_RESOLVE_ATTACHED] = "resolve-attached", \
[FIB_PATH_CFG_ATTRIBUTE_LOCAL] = "local", \
+ [FIB_PATH_CFG_ATTRIBUTE_ATTACHED] = "attached", \
}
#define FOR_EACH_FIB_PATH_CFG_ATTRIBUTE(_item) \
@@ -100,6 +105,7 @@ typedef enum fib_path_cfg_flags_t_ {
FIB_PATH_CFG_FLAG_RESOLVE_HOST = (1 << FIB_PATH_CFG_ATTRIBUTE_RESOLVE_HOST),
FIB_PATH_CFG_FLAG_RESOLVE_ATTACHED = (1 << FIB_PATH_CFG_ATTRIBUTE_RESOLVE_ATTACHED),
FIB_PATH_CFG_FLAG_LOCAL = (1 << FIB_PATH_CFG_ATTRIBUTE_LOCAL),
+ FIB_PATH_CFG_FLAG_ATTACHED = (1 << FIB_PATH_CFG_ATTRIBUTE_ATTACHED),
} __attribute__ ((packed)) fib_path_cfg_flags_t;
diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c
index a0ce0bbb4de..7818d02e05d 100644
--- a/src/vnet/fib/fib_table.c
+++ b/src/vnet/fib/fib_table.c
@@ -480,6 +480,7 @@ fib_table_route_path_fixup (const fib_prefix_t *prefix,
path->frp_sw_if_index != ~0)
{
path->frp_addr = prefix->fp_addr;
+ path->frp_flags |= FIB_ROUTE_PATH_ATTACHED;
}
}
diff --git a/src/vnet/fib/fib_types.h b/src/vnet/fib/fib_types.h
index 05e0e0af4c9..1c5299a9214 100644
--- a/src/vnet/fib/fib_types.h
+++ b/src/vnet/fib/fib_types.h
@@ -282,6 +282,10 @@ typedef enum fib_route_path_flags_t_
* A for-us/local path
*/
FIB_ROUTE_PATH_LOCAL = (1 << 2),
+ /**
+ * Attached path
+ */
+ FIB_ROUTE_PATH_ATTACHED = (1 << 3),
} fib_route_path_flags_t;
/**