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.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
}
#!/usr/bin/env python
import unittest
from framework import VppTestCase, VppTestRunner
from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath
class TestSession(VppTestCase):
""" Session Test Case """
@classmethod
def setUpClass(cls):
super(TestSession, cls).setUpClass()
def setUp(self):
super(TestSession, self).setUp()
self.vapi.session_enable_disable(is_enabled=1)
self.create_loopback_interfaces(range(2))
table_id = 0
for i in self.lo_interfaces:
i.admin_up()
if table_id != 0:
tbl = VppIpTable(self, table_id)
tbl.add_vpp_config()
i.set_table_ip4(table_id)
i.config_ip4()
table_id += 1
# Configure namespaces
self.vapi.app_namespace_add(namespace_id="0",
sw_if_index=self.loop0.sw_if_index)
self.vapi.app_namespace_add(namespace_id="1",
sw_if_index=self.loop1.sw_if_index)
def
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.highlight .l { color: #ae81ff } /* Literal */
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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <vnet/adj/adj_mcast.h>
#include <vnet/adj/adj_internal.h>
#include <vnet/fib/fib_walk.h>
#include <vnet/ip/ip.h>
/*
* The 'DB' of all mcast adjs.
* There is only one mcast per-interface per-protocol, so this is a per-interface
* vector
*/
static adj_index_t *adj_mcasts[FIB_PROTOCOL_MAX];
static u32
adj_get_mcast_node (fib_protocol_t proto)
{
switch (proto) {
case FIB_PROTOCOL_IP4:
return (ip4_rewrite_mcast_node.index);
case FIB_PROTOCOL_IP6:
return (ip6_rewrite_mcast_node.index);
case FIB_PROTOCOL_MPLS:
break;
}
ASSERT(0);
return (0);
}
/*
* adj_mcast_add_or_lock
*
* The next_hop address here is used for source address selection in the DP.
* The mcast adj is added to an interface's connected prefix, the next-hop
* passed here is the local prefix on the same interface.
*/
adj_index_t
adj_mcast_add_or_lock (fib_protocol_t proto,
vnet_link_t link_type,
u32 sw_if_index)
{
ip_adjacency_t * adj;
vec_validate_init_empty(adj_mcasts[proto], sw_if_index, ADJ_INDEX_INVALID);
if (ADJ_INDEX_INVALID == adj_mcasts[proto][sw_if_index])
{
vnet_main_t *vnm;
vnm = vnet_get_main();
adj = adj_alloc(proto);
adj->lookup_next_index = IP_LOOKUP_NEXT_MCAST;
adj->ia_nh_proto = proto;
adj->ia_link = link_type;
adj_mcasts[proto][sw_if_index] = adj_get_index(adj);
adj_lock(adj_get_index(adj));
vnet_rewrite_init(vnm, sw_if_index, link_type,
adj_get_mcast_node(proto),
vnet_tx_node_index_for_sw_interface(vnm, sw_if_index),
&adj->rewrite_header);
/*
* we need a rewrite where the destination IP address is converted
* to the appropriate link-layer address. This is interface specific.
* So ask the interface to do it.
*/
vnet_update_adjacency_for_sw_interface(vnm, sw_if_index,
adj_get_index(adj));
}
else
{
adj = adj_get(adj_mcasts[proto][sw_if_index]);
adj_lock(adj_get_index(adj));
}
return (adj_get_index(adj));
}
/**
* adj_mcast_update_rewrite
*
* Update the adjacency's rewrite string. A NULL string implies the
* rewrite is reset (i.e. when ARP/ND entry is gone).
* NB: the adj being updated may be handling traffic in the DP.
*/
void
adj_mcast_update_rewrite (adj_index_t adj_index,
u8 *rewrite,
u8 offset)
{
ip_adjacency_t *adj;
ASSERT(ADJ_INDEX_INVALID != adj_index);
adj = adj_get(adj_index);
/*
* update the adj's rewrite string and build the arc
* from the rewrite node to the interface's TX node
*/
adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_MCAST,
adj_get_mcast_node(adj->ia_nh_proto),
vnet_tx_node_index_for_sw_interface(
vnet_get_main(),
adj->rewrite_header.sw_if_index),
rewrite);
/*
* set the offset corresponding to the mcast IP address rewrite
*/
adj->rewrite_header.dst_mcast_offset = offset;
}
/**
* adj_mcast_midchain_update_rewrite
*
* Update the adjacency's rewrite string. A NULL string implies the
* rewrite is reset (i.e. when ARP/ND entry is gone).
* NB: the adj being updated may be handling traffic in the DP.
*/
void
adj_mcast_midchain_update_rewrite (adj_index_t adj_index,
adj_midchain_fixup_t fixup,
const void *fixup_data,
adj_flags_t flags,
u8 *rewrite,
u8 offset,
u32 mask)
{
ip_adjacency_t *adj;
ASSERT(ADJ_INDEX_INVALID != adj_index);
adj = adj_get(adj_index);
/*
* one time only update. since we don't support changing the tunnel
* src,dst, this is all we need.
*/
ASSERT(adj->lookup_next_index == IP_LOOKUP_NEXT_MCAST);
/*
* tunnels can always provide a rewrite.
*/
ASSERT(NULL != rewrite);
adj_midchain_setup(adj_index, fixup, fixup_data, flags);
/*
* update the adj's rewrite string and build the arc
* from the rewrite node to the interface's TX node
*/
adj_nbr_update_rewrite_internal(adj, IP_LOOKUP_NEXT_MCAST_MIDCHAIN,
adj_get_mcast_node(adj->ia_nh_proto),
vnet_tx_node_index_for_sw_interface(
vnet_get_main(),
adj->rewrite_header.sw_if_index),
rewrite);
adj->rewrite_header.dst_mcast_offset = offset;
}
void
adj_mcast_remove (fib_protocol_t proto,
u32 sw_if_index)
{
ASSERT(sw_if_index < vec_len(adj_mcasts[proto]));
adj_mcasts[proto][sw_if_index] = ADJ_INDEX_INVALID;
}
static clib_error_t *
adj_mcast_interface_state_change (vnet_main_t * vnm,
u32 sw_if_index,
u32 flags)
{
/*
* for each mcast on the interface trigger a walk back to the children
*/
fib_protocol_t proto;
ip_adjacency_t *adj;
for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
{
if (sw_if_index >= vec_len(adj_mcasts[proto]) ||
ADJ_INDEX_INVALID == adj_mcasts[proto][sw_if_index])
continue;
adj = adj_get(adj_mcasts[proto][sw_if_index]);
fib_node_back_walk_ctx_t bw_ctx = {
.fnbw_reason = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP ?
FIB_NODE_BW_REASON_FLAG_INTERFACE_UP :
FIB_NODE_BW_REASON_FLAG_INTERFACE_DOWN),
};
fib_walk_sync(FIB_NODE_TYPE_ADJ, adj_get_index(adj), &bw_ctx);
}
return (NULL);
}
VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(adj_mcast_interface_state_change);
/**
* @brief Invoked on each SW interface of a HW interface when the
* HW interface state changes
*/
static walk_rc_t
adj_mcast_hw_sw_interface_state_change (vnet_main_t * vnm,
u32 sw_if_index,
void *arg)
{
adj_mcast_interface_state_change(vnm, sw_if_index, (uword) arg);
return (WALK_CONTINUE);
}
/**
* @brief Registered callback for HW interface state changes
*/
static clib_error_t *
adj_mcast_hw_interface_state_change (vnet_main_t * vnm,
u32 hw_if_index,
u32 flags)
{
/*
* walk SW interfaces on the HW
*/
uword sw_flags;
sw_flags = ((flags & VNET_HW_INTERFACE_FLAG_LINK_UP) ?
VNET_SW_INTERFACE_FLAG_ADMIN_UP :
0);
vnet_hw_interface_walk_sw(vnm, hw_if_index,
adj_mcast_hw_sw_interface_state_change,
(void*) sw_flags);
return (NULL);
}
VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION(
adj_mcast_hw_interface_state_change);
static clib_error_t *
adj_mcast_interface_delete (vnet_main_t * vnm,
u32 sw_if_index,
u32 is_add)
{
/*
* for each mcast on the interface trigger a walk back to the children
*/
fib_protocol_t proto;
ip_adjacency_t *adj;
if (is_add)
{
/*
* not interested in interface additions. we will not back walk
* to resolve paths through newly added interfaces. Why? The control
* plane should have the brains to add interfaces first, then routes.
* So the case where there are paths with a interface that matches
* one just created is the case where the path resolved through an
* interface that was deleted, and still has not been removed. The
* new interface added, is NO GUARANTEE that the interface being
* added now, even though it may have the same sw_if_index, is the
* same interface that the path needs. So tough!
* If the control plane wants these routes to resolve it needs to
* remove and add them again.
*/
return (NULL);
}
for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
{
if (sw_if_index >= vec_len(adj_mcasts[proto]) ||
ADJ_INDEX_INVALID == adj_mcasts[proto][sw_if_index])
continue;
adj = adj_get(adj_mcasts[proto][sw_if_index]);
fib_node_back_walk_ctx_t bw_ctx = {
.fnbw_reason = FIB_NODE_BW_REASON_FLAG_INTERFACE_DELETE,
};
fib_walk_sync(FIB_NODE_TYPE_ADJ, adj_get_index(adj), &bw_ctx);
}
return (NULL);
}
VNET_SW_INTERFACE_ADD_DEL_FUNCTION(adj_mcast_interface_delete);
/**
* @brief Walk the multicast Adjacencies on a given interface
*/
void
adj_mcast_walk (u32 sw_if_index,
fib_protocol_t proto,
adj_walk_cb_t cb,
void *ctx)
{
if (vec_len(adj_mcasts[proto]) > sw_if_index)
{
if (ADJ_INDEX_INVALID != adj_mcasts[proto][sw_if_index])
{
cb(adj_mcasts[proto][sw_if_index], ctx);
}
}
}
u8*
format_adj_mcast (u8* s, va_list *ap)
{
index_t index = va_arg(*ap, index_t);
CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
ip_adjacency_t * adj;
if (!adj_is_valid(index))
return format(s, "<invalid adjacency>");
adj = adj_get(index);
s = format(s, "%U-mcast: ",
format_fib_protocol, adj->ia_nh_proto);
if (adj->rewrite_header.flags & VNET_REWRITE_HAS_FEATURES)
s = format(s, "[features] ");
s = format (s, "%U",
format_vnet_rewrite,
&adj->rewrite_header, sizeof (adj->rewrite_data), 0);
return (s);
}
u8*
format_adj_mcast_midchain (u8* s, va_list *ap)
{
index_t index = va_arg(*ap, index_t);
CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
ip_adjacency_t * adj = adj_get(index);
s = format(s, "%U-mcast-midchain: ",
format_fib_protocol, adj->ia_nh_proto);
s = format (s, "%U",
format_vnet_rewrite,
&adj->rewrite_header,
sizeof (adj->rewrite_data), 0);
s = format (s, "\n%Ustacked-on:\n%U%U",
format_white_space, indent,
format_white_space, indent+2,
format_dpo_id, &adj->sub_type.midchain.next_dpo, indent+2);
return (s);
}
static void
adj_dpo_lock (dpo_id_t *dpo)
{
adj_lock(dpo->dpoi_index);
}
static void
adj_dpo_unlock (dpo_id_t *dpo)
{
adj_unlock(dpo->dpoi_index);
}
const static dpo_vft_t adj_mcast_dpo_vft = {
.dv_lock = adj_dpo_lock,
.dv_unlock = adj_dpo_unlock,
.dv_format = format_adj_mcast,
.dv_get_urpf = adj_dpo_get_urpf,
};
const static dpo_vft_t adj_mcast_midchain_dpo_vft = {
.dv_lock = adj_dpo_lock,
.dv_unlock = adj_dpo_unlock,
.dv_format = format_adj_mcast_midchain,
.dv_get_urpf = adj_dpo_get_urpf,
};
/**
* @brief The per-protocol VLIB graph nodes that are assigned to a mcast
* object.
*
* this means that these graph nodes are ones from which a mcast is the
* parent object in the DPO-graph.
*/
const static char* const adj_mcast_ip4_nodes[] =
{
"ip4-rewrite-mcast",
NULL,
};
const static char* const adj_mcast_ip6_nodes[] =
{
"ip6-rewrite-mcast",
NULL,
};
const static char* const * const adj_mcast_nodes[DPO_PROTO_NUM] =
{
[DPO_PROTO_IP4] = adj_mcast_ip4_nodes,
[DPO_PROTO_IP6] = adj_mcast_ip6_nodes,
[DPO_PROTO_MPLS] = NULL,
};
/**
* @brief The per-protocol VLIB graph nodes that are assigned to a mcast
* object.
*
* this means that these graph nodes are ones from which a mcast is the
* parent object in the DPO-graph.
*/
const static char* const adj_mcast_midchain_ip4_nodes[] =
{
"ip4-mcast-midchain",
NULL,
};
const static char* const adj_mcast_midchain_ip6_nodes[] =
{
"ip6-mcast-midchain",
NULL,
};
const static char* const * const adj_mcast_midchain_nodes[DPO_PROTO_NUM] =
{
[DPO_PROTO_IP4] = adj_mcast_midchain_ip4_nodes,
[DPO_PROTO_IP6] = adj_mcast_midchain_ip6_nodes,
[DPO_PROTO_MPLS] = NULL,
};
/**
* @brief Return the size of the adj DB.
* This is only for testing purposes so an efficient implementation is not needed
*/
u32
adj_mcast_db_size (void)
{
u32 n_adjs, sw_if_index;
fib_protocol_t proto;
n_adjs = 0;
for (proto = FIB_PROTOCOL_IP4; proto <= FIB_PROTOCOL_IP6; proto++)
{
for (sw_if_index = 0;
sw_if_index < vec_len(adj_mcasts[proto]);
sw_if_index++)
{
if (ADJ_INDEX_INVALID != adj_mcasts[proto][sw_if_index])
{
n_adjs++;
}
}
}
return (n_adjs);
}
void
adj_mcast_module_init (void)
{
dpo_register(DPO_ADJACENCY_MCAST,
&adj_mcast_dpo_vft,
adj_mcast_nodes);
dpo_register(DPO_ADJACENCY_MCAST_MIDCHAIN,
&adj_mcast_midchain_dpo_vft,
adj_mcast_midchain_nodes);
}
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