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authorNeale Ranns <neale@graphiant.com>2020-12-21 08:29:34 +0000
committerOle Tr�an <otroan@employees.org>2021-02-15 17:27:48 +0000
commit8f5fef2c78b95de1a636ce27111722b71702212a (patch)
treea0ebd0189969ccae1f0bdd7c1a9c18dd7a066f2e /src/vnet/ip/ip_api.c
parent54be0cc044f445853fae7b8995c477605250af16 (diff)
ip: Path MTU
Type: feature Support setting the MTU for a peer on an interface. The minimum value of the path and interface MTU is used at forwarding time. the path MTU is specified for a given peer, by address and table-ID. In the forwarding plane the MTU is enfored either: 1 - if the peer is attached, then the MTU is set on the peer's adjacency 2 - if the peer is not attached, it is remote, then a DPO is added to the peer's FIB entry to perform the necessary fragmentation. Signed-off-by: Neale Ranns <neale@graphiant.com> Change-Id: I8b9ea6a07868b50e97e2561f18d9335407dea7ae
Diffstat (limited to 'src/vnet/ip/ip_api.c')
-rw-r--r--src/vnet/ip/ip_api.c92
1 files changed, 79 insertions, 13 deletions
diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index 3bf404baadf..5b87f7cc86a 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -28,6 +28,7 @@
#include <vnet/ip/ip_types_api.h>
#include <vnet/ip/ip_punt_drop.h>
#include <vnet/ip/ip_types_api.h>
+#include <vnet/ip/ip_path_mtu.h>
#include <vnet/fib/fib_table.h>
#include <vnet/fib/fib_api.h>
#include <vnet/ethernet/arp_packet.h>
@@ -104,7 +105,11 @@
_ (IP_REASSEMBLY_SET, ip_reassembly_set) \
_ (IP_REASSEMBLY_GET, ip_reassembly_get) \
_ (IP_REASSEMBLY_ENABLE_DISABLE, ip_reassembly_enable_disable) \
- _ (IP_PUNT_REDIRECT_DUMP, ip_punt_redirect_dump)
+ _ (IP_PUNT_REDIRECT_DUMP, ip_punt_redirect_dump) \
+ _ (IP_PATH_MTU_UPDATE, ip_path_mtu_update) \
+ _ (IP_PATH_MTU_REPLACE_BEGIN, ip_path_mtu_replace_begin) \
+ _ (IP_PATH_MTU_REPLACE_END, ip_path_mtu_replace_end) \
+ _ (IP_PATH_MTU_GET, ip_path_mtu_get)
static void
vl_api_sw_interface_ip6_enable_disable_t_handler
@@ -1134,18 +1139,18 @@ static void
REPLY_MACRO (VL_API_IP_CONTAINER_PROXY_ADD_DEL_REPLY);
}
-typedef struct ip_container_proxy_walk_ctx_t_
+typedef struct ip_walk_ctx_t_
{
vl_api_registration_t *reg;
u32 context;
-} ip_container_proxy_walk_ctx_t;
+} ip_walk_ctx_t;
static int
ip_container_proxy_send_details (const fib_prefix_t * pfx, u32 sw_if_index,
void *args)
{
vl_api_ip_container_proxy_details_t *mp;
- ip_container_proxy_walk_ctx_t *ctx = args;
+ ip_walk_ctx_t *ctx = args;
mp = vl_msg_api_alloc (sizeof (*mp));
if (!mp)
@@ -1173,7 +1178,7 @@ vl_api_ip_container_proxy_dump_t_handler (vl_api_ip_container_proxy_dump_t *
if (!reg)
return;
- ip_container_proxy_walk_ctx_t ctx = {
+ ip_walk_ctx_t ctx = {
.context = mp->context,
.reg = reg,
};
@@ -1624,21 +1629,15 @@ void
REPLY_MACRO (VL_API_IP_REASSEMBLY_ENABLE_DISABLE_REPLY);
}
-typedef struct ip_punt_redirect_walk_ctx_t_
-{
- vl_api_registration_t *reg;
- u32 context;
-} ip_punt_redirect_walk_ctx_t;
-
static walk_rc_t
send_ip_punt_redirect_details (u32 rx_sw_if_index,
const ip_punt_redirect_rx_t * ipr, void *arg)
{
- ip_punt_redirect_walk_ctx_t *ctx = arg;
vl_api_ip_punt_redirect_details_t *mp;
fib_path_encode_ctx_t path_ctx = {
.rpaths = NULL,
};
+ ip_walk_ctx_t *ctx = arg;
mp = vl_msg_api_alloc (sizeof (*mp));
if (!mp)
@@ -1676,7 +1675,7 @@ vl_api_ip_punt_redirect_dump_t_handler (vl_api_ip_punt_redirect_dump_t * mp)
if (mp->is_ipv6 == 1)
fproto = FIB_PROTOCOL_IP6;
- ip_punt_redirect_walk_ctx_t ctx = {
+ ip_walk_ctx_t ctx = {
.reg = reg,
.context = mp->context,
};
@@ -1699,6 +1698,73 @@ vl_api_ip_punt_redirect_dump_t_handler (vl_api_ip_punt_redirect_dump_t * mp)
ip_punt_redirect_walk (fproto, send_ip_punt_redirect_details, &ctx);
}
+void
+vl_api_ip_path_mtu_update_t_handler (vl_api_ip_path_mtu_update_t *mp)
+{
+ vl_api_ip_path_mtu_update_reply_t *rmp;
+ ip_address_t nh;
+ int rv = 0;
+
+ ip_address_decode2 (&mp->pmtu.nh, &nh);
+
+ rv = ip_path_mtu_update (&nh, ntohl (mp->pmtu.table_id),
+ ntohs (mp->pmtu.path_mtu));
+
+ REPLY_MACRO (VL_API_IP_PATH_MTU_UPDATE_REPLY);
+}
+
+void
+vl_api_ip_path_mtu_replace_begin_t_handler (
+ vl_api_ip_path_mtu_replace_begin_t *mp)
+{
+ vl_api_ip_path_mtu_replace_begin_reply_t *rmp;
+ int rv;
+
+ rv = ip_path_mtu_replace_begin ();
+
+ REPLY_MACRO (VL_API_IP_PATH_MTU_REPLACE_BEGIN_REPLY);
+}
+
+void
+vl_api_ip_path_mtu_replace_end_t_handler (vl_api_ip_path_mtu_replace_end_t *mp)
+{
+ vl_api_ip_path_mtu_replace_end_reply_t *rmp;
+ int rv;
+
+ rv = ip_path_mtu_replace_end ();
+
+ REPLY_MACRO (VL_API_IP_PATH_MTU_REPLACE_END_REPLY);
+}
+
+static void
+send_ip_path_mtu_details (index_t ipti, vl_api_registration_t *rp, u32 context)
+{
+ vl_api_ip_path_mtu_details_t *rmp;
+ ip_address_t ip;
+ ip_pmtu_t *ipt;
+
+ ipt = ip_path_mtu_get (ipti);
+
+ REPLY_MACRO_DETAILS4 (VL_API_IP_PATH_MTU_DETAILS, rp, context, ({
+ ip_pmtu_get_ip (ipt, &ip);
+ ip_address_encode2 (&ip, &rmp->pmtu.nh);
+ rmp->pmtu.table_id =
+ htonl (ip_pmtu_get_table_id (ipt));
+ rmp->pmtu.path_mtu = htons (ipt->ipt_cfg_pmtu);
+ }));
+}
+
+static void
+vl_api_ip_path_mtu_get_t_handler (vl_api_ip_path_mtu_get_t *mp)
+{
+ vl_api_ip_path_mtu_get_reply_t *rmp;
+ i32 rv = 0;
+
+ REPLY_AND_DETAILS_MACRO (
+ VL_API_IP_PATH_MTU_GET_REPLY, ip_pmtu_pool,
+ ({ send_ip_path_mtu_details (cursor, rp, mp->context); }));
+}
+
#define vl_msg_name_crc_list
#include <vnet/ip/ip.api.h>
#undef vl_msg_name_crc_list