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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.
*/
#ifndef included_vnet_handoff_h
#define included_vnet_handoff_h
#include <vlib/vlib.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/mpls/packet.h>
static inline u64
ipv4_get_key (ip4_header_t * ip)
{
u64 hash_key;
hash_key = *((u64 *) (&ip->address_pair)) ^ ip->protocol;
return hash_key;
}
static inline u64
ipv6_get_key (ip6_header_t * ip)
{
u64 hash_key;
hash_key = ip->src_address.as_u64[0] ^
rotate_left (ip->src_address.as_u64[1], 13) ^
rotate_left (ip->dst_address.as_u64[0], 26) ^
rotate_left (ip->dst_address.as_u64[1], 39) ^ ip->protocol;
return hash_key;
}
#define MPLS_BOTTOM_OF_STACK_BIT_MASK 0x00000100U
#define MPLS_LABEL_MASK 0xFFFFF000U
static inline u64
mpls_get_key (mpls_unicast_header_t * m)
{
u64 hash_key;
u8 ip_ver;
/* find the bottom of the MPLS label stack. */
if (PREDICT_TRUE (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK)))
{
goto bottom_lbl_found;
}
m++;
if (PREDICT_TRUE (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK)))
{
goto bottom_lbl_found;
}
m++;
if (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK))
{
goto bottom_lbl_found;
}
m++;
if (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK))
{
goto bottom_lbl_found;
}
m++;
if (m->label_exp_s_ttl &
clib_net_to_host_u32 (MPLS_BOTTOM_OF_STACK_BIT_MASK))
{
goto bottom_lbl_found;
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */# Copyright (c) 2019 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.
"""Segment Routing over IPv6 data plane utilities library."""
from enum import IntEnum
from ipaddress import ip_address, IPv6Address
from resources.libraries.python.Constants import Constants
from resources.libraries.python.InterfaceUtil import InterfaceUtil
from resources.libraries.python.PapiExecutor import PapiSocketExecutor
class SRv6Behavior(IntEnum):
"""SRv6 LocalSID supported functions."""
# Endpoint function
END = 1
# Endpoint function with Layer-3 cross-connect
END_X = 2
# Endpoint with decapsulation and Layer-2 cross-connect
END_DX2 = 5
# Endpoint with decapsulation and IPv6 cross-connect
END_DX6 = 6
# Endpoint with decapsulation and IPv4 cross-connect
END_DX4 = 7
# Endpoint with decapsulation and IPv6 table lookup
END_DT6 = 8
# Endpoint with decapsulation and IPv4 table lookup
END_DT4 = 9
# Endpoint to SR-unaware appliance via static proxy
END_AS = 20
# Endpoint to SR-unaware appliance via dynamic proxy
END_AD = 21
# Endpoint to SR-unaware appliance via masquerading
END_AM = 22
class SRv6PolicySteeringTypes(IntEnum):
"""SRv6 LocalSID supported functions."""
SR_STEER_L2 = 2
SR_STEER_IPV4 = 4
SR_STEER_IPV6 = 6
class SRv6:
"""SRv6 class."""
@staticmethod
def create_srv6_sid_object(ip_addr):
"""Create SRv6 SID object.
:param ip_addr: IPv6 address.
:type ip_addr: str
:returns: SRv6 SID object.
:rtype: dict
"""
return dict(
addr=IPv6Address(ip_addr).packed
)
@staticmethod
def create_srv6_sid_list(sids):
"""Create SRv6 SID list object.
:param sids: SID IPv6 addresses.
:type sids: list
:returns: SRv6 SID list object.
:rtype: list
"""
sid_list = [0] * 16
for index, item in enumerate(sids):
sid_list[index] = SRv6.create_srv6_sid_object(item)
return dict(
num_sids=len(sids),
weight=1,
sids=sid_list
)
@staticmethod
def configure_sr_localsid(
node, local_sid, behavior, interface=None, next_hop=None,
fib_table=None, out_if=None, in_if=None, src_addr=None,
sid_list=None):
"""Create SRv6 LocalSID and binds it to a particular behaviour on
the given node.
:param node: Given node to create localSID on.
:param local_sid: LocalSID IPv6 address.
:param behavior: SRv6 LocalSID function.
:param interface: Interface name (Optional, required for
L2/L3 xconnects).
:param next_hop: Next hop IPv4/IPv6 address (Optional, required for L3
xconnects).
:param fib_table: FIB table for IPv4/IPv6 lookup (Optional, required for
L3 routing).
:param out_if: Interface name of local interface for sending traffic
towards the Service Function (Optional, required for SRv6 endpoint
to SR-unaware appliance).
:param in_if: Interface name of local interface receiving the traffic
coming back from the Service Function (Optional, required for SRv6
endpoint to SR-unaware appliance).
:param src_addr: Source address on the packets coming back on in_if
interface (Optional, required for SRv6 endpoint to SR-unaware
appliance via static proxy).
:param sid_list: SID list (Optional, required for SRv6 endpoint to
SR-unaware appliance via static proxy).
:type node: dict
:type local_sid: str
:type behavior: str
:type interface: str
:type next_hop: str
:type fib_table: str
:type out_if: str
:type in_if: str
:type src_addr: str
:type sid_list: list
:raises ValueError: If required parameter is missing.
"""
beh = behavior.replace(u".", u"_").upper()
# There is no SRv6Behaviour enum defined for functions from SRv6 plugins
# so we need to use CLI command to configure it.
if beh in (getattr(SRv6Behavior, u"END_AD").name,
getattr(SRv6Behavior, u"END_AS").name,
getattr(SRv6Behavior, u"END_AM").name):
if beh == getattr(SRv6Behavior, u"END_AS").name:
if next_hop is None or out_if is None or in_if is None or \
src_addr is None or sid_list is None:
raise ValueError(
f"Required parameter(s) missing.\n"
f"next_hop:{next_hop}\n "
f"out_if:{out_if}\n"
f"in_if:{in_if}\n"
f"src_addr:{src_addr}\n"
f"sid_list:{sid_list}"
)
sid_conf = f"next {u' next '.join(sid_list)}"
params = f"nh {next_hop} oif {out_if} iif {in_if} " \
f"src {src_addr} {sid_conf}"
else:
if next_hop is None or out_if is None or in_if is None:
raise ValueError(
f"Required parameter(s) missing.\n"
f"next_hop:{next_hop}\n"
f"out_if:{out_if}\n"
f"in_if:{in_if}"
)
params = f"nh {next_hop} oif {out_if} iif {in_if}"
cli_cmd
|
