import os import array from logging import error from hook import Hook do_import = True try: no_vpp_papi = os.getenv("NO_VPP_PAPI") if no_vpp_papi == "1": do_import = False except: pass if do_import: import vpp_papi # from vnet/vnet/mpls/mpls_types.h MPLS_IETF_MAX_LABEL = 0xfffff MPLS_LABEL_INVALID = MPLS_IETF_MAX_LABEL + 1 class L2_VTR_OP: L2_POP_1 = 3 need_swap = True if os.sys.byteorder == 'little' else False 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("vpp-papi-provider") 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 ppcli(self, cli): """ Helping method to print CLI command in case of info logging level. :param cli: CLI to execute :returns: CLI output """ return cli + "\n" + str(self.cli(cli)) def _convert_mac(self, mac): return int(mac.replace(":", ""), 16) << 16 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_set_table(self, sw_if_index, is_ipv6, table_id): """ Set the IPvX Table-id for the Interface :param sw_if_index: :param is_ipv6: :param table_id: """ return self.api(vpp_papi.sw_interface_set_table, (sw_if_index, is_ipv6, table_id)) 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_enable_disable_mpls(self, sw_if_index, is_enable=1): """ Enable/Disable MPLS on the interface :param sw_if_index: :param is_enable: (Default value = 1) """ return self.api(vpp_papi.sw_interface_set_mpls_enable, (sw_if_index, is_enable)) 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, mcast_sw_if_index=0xFFFFFFFF, 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 mcast_sw_if_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, mcast_sw_if_index, encap_vrf_id, decap_next_index, vni)) def bridge_domain_add_del(self, bd_id, flood=1, uu_flood=1, forward=1, learn=1, arp_term=0, is_add=1): """Create/delete bridge domain. :param int bd_id: Bridge domain index. :param int flood: Enable/disable bcast/mcast flooding in the BD. (Default value = 1) :param int uu_flood: Enable/disable unknown unicast flood in the BD. (Default value = 1) :param int forward: Enable/disable forwarding on all interfaces in the BD. (Default value = 1) :param int learn: Enable/disable learning on all interfaces in the BD. (Default value = 1) :param int arp_term: Enable/disable arp termination in the BD. (Default value = 1) :param int is_add: Add or delete flag. (Default value = 1) """ return self.api(vpp_papi.bridge_domain_add_del, (bd_id, flood, uu_flood, forward, learn, arp_term, is_add)) def l2fib_add_del(self, mac, bd_id, sw_if_index, is_add=1, static_mac=0, filter_mac=0, bvi_mac=0): """Create/delete L2 FIB entry. :param str mac: MAC address to create FIB entry for. :param int bd_id: Bridge domain index. :param int sw_if_index: Software interface index of the interface. :param int is_add: Add or delete flag. (Default value = 1) :param int static_mac: Set to 1 to create static MAC entry. (Default value = 0) :param int filter_mac: Set to 1 to drop packet that's source or destination MAC address contains defined MAC address. (Default value = 0) :param int bvi_mac: Set to 1 to create entry that points to BVI interface. (Default value = 0) """ return self.api(vpp_papi.l2fib_add_del, (self._convert_mac(mac), bd_id, sw_if_index, is_add, static_mac, filter_mac, bvi_mac)) def sw_interface_set_l2_bridge(self, sw_if_index, bd_id, shg=0, bvi=0, enable=1): """Add/remove interface to/from bridge domain. :param int sw_if_index: Software interface index of the interface. :param int bd_id: Bridge domain index. :param int shg: Split-horizon group index. (Default value = 0) :param int bvi: Set interface as a bridge group virtual interface. (Default value = 0) :param int enable: Add or remove interface. (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 int rx_sw_if_index: Software interface index of Rx interface. :param int tx_sw_if_index: Software interface index of Tx interface. :param int enable: Create cross-connect if equal to 1, delete cross-connect if equal to 0. """ return self.api(vpp_papi.sw_interface_set_l2_xconnect, (rx_sw_if_index, tx_sw_if_index, enable)) def sw_interface_set_l2_tag_rewrite(self, sw_if_index, vtr_oper, push=0, tag1=0, tag2=0): """L2 interface vlan tag rewrite configure request :param client_index - opaque cookie to identify the sender :param context - sender context, to match reply w/ request :param sw_if_index - interface the operation is applied to :param vtr_op - Choose from l2_vtr_op_t enum values :param push_dot1q - first pushed flag dot1q id set, else dot1ad :param tag1 - Needed for any push or translate vtr op :param tag2 - Needed for any push 2 or translate x-2 vtr ops """ return self.api(vpp_papi.l2_interface_vlan_tag_rewrite, (sw_if_index, vtr_oper, push, tag1, tag2)) 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 delete_subif(self, sw_if_index): """Delete subinterface :param sw_if_index: """ return self.api(vpp_papi.delete_subif, ([sw_if_index])) 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 create_loopback(self, mac=''): """ :param mac: (Optional) """ return self.api(vpp_papi.create_loopback, (mac,)) def ip_add_del_route( self, dst_address, dst_address_length, next_hop_address, next_hop_sw_if_index=0xFFFFFFFF, table_id=0, next_hop_table_id=0, next_hop_weight=1, next_hop_n_out_labels = 0, next_hop_out_label_stack = [], next_hop_via_label = MPLS_LABEL_INVALID, create_vrf_if_needed=0, is_resolve_host=0, is_resolve_attached=0, classify_table_index=0xFFFFFFFF, is_add=1, is_drop=0, is_unreach=0, is_prohibit=0, is_ipv6=0, is_local=0, is_classify=0, is_multipath=0, not_last=0): """ :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 classify_table_index: (Default value = 0xFFFFFFFF) :param create_vrf_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) """ stack = array.array('I', next_hop_out_label_stack) if need_swap: stack.byteswap() stack = stack.tostring() return self.api( vpp_papi.ip_add_del_route, (next_hop_sw_if_index, table_id, classify_table_index, next_hop_table_id, create_vrf_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, next_hop_n_out_labels, next_hop_via_label, stack)) def ip_neighbor_add_del(self, sw_if_index, mac_address, dst_address, vrf_id=0, is_add=1, is_ipv6=0, is_static=0, ): """ Add neighbor MAC to IPv4 or IPv6 address. :param sw_if_index: :param mac_address: :param dst_address: :param vrf_id: (Default value = 0) :param is_add: (Default value = 1) :param is_ipv6: (Default value = 0) :param is_static: (Default value = 0) """ return self.api( vpp_papi.ip_neighbor_add_del, (vrf_id, sw_if_index, is_add, is_ipv6, is_static, mac_address, dst_address ) ) def sw_interface_span_enable_disable(self, sw_if_index_from, sw_if_index_to, enable=1): """ :param sw_if_index_from: :param sw_if_index_to: :param enable """ return self.api(vpp_papi.sw_interface_span_enable_disable, (sw_if_index_from, sw_if_index_to, enable )) def gre_tunnel_add_del(self, src_address, dst_address, outer_fib_id=0, is_teb=0, is_add=1, is_ip6=0): """ Add a GRE tunnel :param src_address: :param dst_address: :param outer_fib_id: (Default value = 0) :param is_add: (Default value = 1) :param is_ipv6: (Default value = 0) :param is_teb: (Default value = 0) """ return self.api( vpp_papi.gre_add_del_tunnel, (is_add, is_ip6, is_teb, src_address, dst_address, outer_fib_id) ) def mpls_route_add_del( self, label, eos, next_hop_proto_is_ip4, next_hop_address, next_hop_sw_if_index=0xFFFFFFFF, table_id=0, next_hop_table_id=0, next_hop_weight=1, next_hop_n_out_labels = 0, next_hop_out_label_stack = [], next_hop_via_label = MPLS_LABEL_INVALID, create_vrf_if_needed=0, is_resolve_host=0, is_resolve_attached=0, is_add=1, is_drop=0, is_multipath=0, classify_table_index=0xFFFFFFFF, is_classify=0, not_last=0): """ :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 classify_table_index: (Default value = 0xFFFFFFFF) :param create_vrf_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) """ stack = array.array('I', next_hop_out_label_stack) if need_swap: stack.byteswap() stack = stack.tostring() return self.api( vpp_papi.mpls_route_add_del, (label, eos, table_id, classify_table_index, create_vrf_if_needed, is_add, is_classify, is_multipath, is_resolve_host, is_resolve_attached, next_hop_proto_is_ip4, next_hop_weight, next_hop_address, next_hop_n_out_labels, next_hop_sw_if_index, next_hop_table_id, next_hop_via_label, stack)) def mpls_ip_bind_unbind( self, label, dst_address, dst_address_length, table_id=0, ip_table_id=0, is_ip4=1, create_vrf_if_needed=0, is_bind=1): """ """ return self.api( vpp_papi.mpls_ip_bind_unbind, (table_id, label, ip_table_id, create_vrf_if_needed, is_bind, is_ip4, dst_address_length, dst_address)) def mpls_tunnel_add_del( self, tun_sw_if_index, next_hop_proto_is_ip4, next_hop_address, next_hop_sw_if_index=0xFFFFFFFF, next_hop_table_id=0, next_hop_weight=1, next_hop_n_out_labels = 0, next_hop_out_label_stack = [], next_hop_via_label = MPLS_LABEL_INVALID, create_vrf_if_needed=0, is_add=1, l2_only=0): """ :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 classify_table_index: (Default value = 0xFFFFFFFF) :param create_vrf_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) """ stack = array.array('I', next_hop_out_label_stack) if need_swap: stack.byteswap() stack = stack.tostring() return self.api( vpp_papi.mpls_tunnel_add_del, (tun_sw_if_index, is_add, l2_only, next_hop_proto_is_ip4, next_hop_weight, next_hop_address, next_hop_n_out_labels, next_hop_sw_if_index, next_hop_table_id, stack))