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import vpp_papi
from logging import error
from hook import Hook
# from vnet/vnet/mpls/mpls_types.h
MPLS_IETF_MAX_LABEL = 0xfffff
MPLS_LABEL_INVALID = MPLS_IETF_MAX_LABEL + 1
class VppPapiProvider(object):
"""VPP-api provider using vpp-papi
@property hook: hook object providing before and after api/cli hooks
"""
def __init__(self, name, shm_prefix):
self.hook = Hook()
self.name = name
self.shm_prefix = shm_prefix
def register_hook(self, hook):
"""Replace hook registration with new hook
:param hook:
"""
self.hook = hook
def connect(self):
"""Connect the API to VPP"""
vpp_papi.connect(self.name, self.shm_prefix)
def disconnect(self):
"""Disconnect the API from VPP"""
vpp_papi.disconnect()
def api(self, api_fn, api_args, expected_retval=0):
"""Call API function and check it's return value
Call the appropriate hooks before and after the API call
:param api_fn: API function to call
:param api_args: tuple of API function arguments
:param expected_retval: Expected return value (Default value = 0)
:returns: reply from the API
"""
self.hook.before_api(api_fn.__name__, api_args)
reply = api_fn(*api_args)
if hasattr(reply, 'retval') and reply.retval != expected_retval:
msg = "API call failed, expected retval == %d, got %s" % (
expected_retval, repr(reply))
error(msg)
raise Exception(msg)
self.hook.after_api(api_fn.__name__, api_args)
return reply
def cli(self, cli):
"""Execute a CLI, calling the before/after hooks appropriately
:param cli: CLI to execute
:returns: CLI output
"""
self.hook.before_cli(cli)
cli += '\n'
r = vpp_papi.cli_inband(len(cli), cli)
self.hook.after_cli(cli)
if(hasattr(r, 'reply')):
return r.reply[0].decode().rstrip('\x00')
def show_version(self):
""" """
return vpp_papi.show_version()
def pg_create_interface(self, pg_index):
"""
:param pg_index:
"""
return self.api(vpp_papi.pg_create_interface, (pg_index, ))
def sw_interface_dump(self, filter=None):
"""
:param filter: (Default value = None)
"""
if filter is not None:
args = (1, filter)
else:
args = (0, b'')
return self.api(vpp_papi.sw_interface_dump, args)
def sw_interface_add_del_address(self, sw_if_index, addr, addr_len,
is_ipv6=0, is_add=1, del_all=0):
"""
:param addr: param is_ipv6: (Default value = 0)
:param sw_if_index:
:param addr_len:
:param is_ipv6: (Default value = 0)
:param is_add: (Default value = 1)
:param del_all: (Default value = 0)
"""
return self.api(vpp_papi.sw_interface_add_del_address,
(sw_if_index, is_add, is_ipv6, del_all, addr_len, addr))
def sw_interface_ra_suppress(self, sw_if_index):
suppress = 1
managed = 0
other = 0
ll_option = 0
send_unicast = 0
cease = 0
is_no = 0
default_router = 0
max_interval = 0
min_interval = 0
lifetime = 0
initial_count = 0
initial_interval = 0
async = False
return self.api(vpp_papi.sw_interface_ip6nd_ra_config,
(sw_if_index, suppress, managed, other,
ll_option, send_unicast, cease, is_no,
default_router, max_interval, min_interval,
lifetime, initial_count, initial_interval, async))
def vxlan_add_del_tunnel(
self,
src_addr,
dst_addr,
is_add=1,
is_ipv6=0,
encap_vrf_id=0,
decap_next_index=0xFFFFFFFF,
vni=0):
"""
:param dst_addr:
:param src_addr:
:param is_add: (Default value = 1)
:param is_ipv6: (Default value = 0)
:param encap_vrf_id: (Default value = 0)
:param decap_next_index: (Default value = 0xFFFFFFFF)
:param vni: (Default value = 0)
"""
return self.api(vpp_papi.vxlan_add_del_tunnel,
(is_add, is_ipv6, src_addr, dst_addr, encap_vrf_id,
decap_next_index, vni))
def sw_interface_set_l2_bridge(self, sw_if_index, bd_id,
shg=0, bvi=0, enable=1):
"""
:param bd_id:
:param sw_if_index:
:param shg: (Default value = 0)
:param bvi: (Default value = 0)
:param enable: (Default value = 1)
"""
return self.api(vpp_papi.sw_interface_set_l2_bridge,
(sw_if_index, bd_id, shg, bvi, enable))
def sw_interface_set_l2_xconnect(self, rx_sw_if_index, tx_sw_if_index,
enable):
"""Create or delete unidirectional cross-connect from Tx interface to
Rx interface.
:param rx_sw_if_index: Software interface index of Rx interface.
:param tx_sw_if_index: Software interface index of Tx interface.
:param enable: Create cross-connect if equal to 1, delete cross-connect
if equal to 0.
:type rx_sw_if_index: str or int
:type rx_sw_if_index: str or int
:type enable: int
"""
return self.api(vpp_papi.sw_interface_set_l2_xconnect,
(rx_sw_if_index, tx_sw_if_index, enable))
def sw_interface_set_flags(self, sw_if_index, admin_up_down,
link_up_down=0, deleted=0):
"""
:param admin_up_down:
:param sw_if_index:
:param link_up_down: (Default value = 0)
:param deleted: (Default value = 0)
"""
return self.api(vpp_papi.sw_interface_set_flags,
(sw_if_index, admin_up_down, link_up_down, deleted))
def create_subif(self, sw_if_index, sub_id, outer_vlan, inner_vlan,
no_tags=0, one_tag=0, two_tags=0, dot1ad=0, exact_match=0,
default_sub=0, outer_vlan_id_any=0, inner_vlan_id_any=0):
"""Create subinterface
from vpe.api: set dot1ad = 0 for dot1q, set dot1ad = 1 for dot1ad
:param sub_id: param inner_vlan:
:param sw_if_index:
:param outer_vlan:
:param inner_vlan:
:param no_tags: (Default value = 0)
:param one_tag: (Default value = 0)
:param two_tags: (Default value = 0)
:param dot1ad: (Default value = 0)
:param exact_match: (Default value = 0)
:param default_sub: (Default value = 0)
:param outer_vlan_id_any: (Default value = 0)
:param inner_vlan_id_any: (Default value = 0)
"""
return self.api(
vpp_papi.create_subif,
(sw_if_index,
sub_id,
no_tags,
one_tag,
two_tags,
dot1ad,
exact_match,
default_sub,
outer_vlan_id_any,
inner_vlan_id_any,
outer_vlan,
inner_vlan))
def create_vlan_subif(self, sw_if_index, vlan):
"""
:param vlan:
:param sw_if_index:
"""
return self.api(vpp_papi.create_vlan_subif, (sw_if_index, vlan))
def ip_add_del_route(
self,
dst_address,
dst_address_length,
next_hop_address,
next_hop_sw_if_index=0xFFFFFFFF,
table_id=0,
resolve_attempts=0,
classify_table_index=0xFFFFFFFF,
next_hop_out_label=MPLS_LABEL_INVALID,
next_hop_table_id=0,
create_vrf_if_needed=0,
resolve_if_needed=0,
is_add=1,
is_drop=0,
is_unreach=0,
is_prohibit=0,
is_ipv6=0,
is_local=0,
is_classify=0,
is_multipath=0,
is_resolve_host=0,
is_resolve_attached=0,
not_last=0,
next_hop_weight=1):
"""
:param dst_address_length:
:param next_hop_sw_if_index: (Default value = 0xFFFFFFFF)
:param dst_address:
:param next_hop_address:
:param next_hop_sw_if_index: (Default value = 0xFFFFFFFF)
:param vrf_id: (Default value = 0)
:param lookup_in_vrf: (Default value = 0)
:param resolve_attempts: (Default value = 0)
:param classify_table_index: (Default value = 0xFFFFFFFF)
:param create_vrf_if_needed: (Default value = 0)
:param resolve_if_needed: (Default value = 0)
:param is_add: (Default value = 1)
:param is_drop: (Default value = 0)
:param is_ipv6: (Default value = 0)
:param is_local: (Default value = 0)
:param is_classify: (Default value = 0)
:param is_multipath: (Default value = 0)
:param is_resolve_host: (Default value = 0)
:param is_resolve_attached: (Default value = 0)
:param not_last: (Default value = 0)
:param next_hop_weight: (Default value = 1)
"""
return self.api(
vpp_papi.ip_add_del_route,
(next_hop_sw_if_index,
table_id,
resolve_attempts,
classify_table_index,
next_hop_out_label,
next_hop_table_id,
create_vrf_if_needed,
resolve_if_needed,
is_add,
is_drop,
is_unreach,
is_prohibit,
is_ipv6,
is_local,
is_classify,
is_multipath,
is_resolve_host,
is_resolve_attached,
not_last,
next_hop_weight,
dst_address_length,
dst_address,
next_hop_address))
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