X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=test%2Fvpp_pg_interface.py;h=567b81de7c08bf6f46d42edc941df662c869999f;hb=0c56217a307556524cfc92a1aeb1eb72112271d2;hp=81737c6d56719588837a43993ad3dab9e449d8c5;hpb=97f6edc1f5f94fbd5591a85cd710230bd310daa5;p=vpp.git diff --git a/test/vpp_pg_interface.py b/test/vpp_pg_interface.py old mode 100644 new mode 100755 index 81737c6d567..567b81de7c0 --- a/test/vpp_pg_interface.py +++ b/test/vpp_pg_interface.py @@ -1,10 +1,15 @@ import os -import time import socket +from socket import inet_pton, inet_ntop +import struct +import time from traceback import format_exc, format_stack + +import scapy.compat from scapy.utils import wrpcap, rdpcap, PcapReader from scapy.plist import PacketList from vpp_interface import VppInterface +from vpp_papi import VppEnum from scapy.layers.l2 import Ether, ARP from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_NA,\ @@ -12,7 +17,11 @@ from scapy.layers.inet6 import IPv6, ICMPv6ND_NS, ICMPv6ND_NA,\ IPv6ExtHdrHopByHop from util import ppp, ppc from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ismaddr -from scapy.utils import inet_pton, inet_ntop + + +class CaptureTimeoutError(Exception): + """ Exception raised if capture or packet doesn't appear within timeout """ + pass def is_ipv6_misc(p): @@ -37,30 +46,57 @@ class VppPGInterface(VppInterface): """packet-generator interface index assigned by VPP""" return self._pg_index + @property + def gso_enabled(self): + """gso enabled on packet-generator interface""" + if self._gso_enabled == 0: + return "gso-disabled" + return "gso-enabled" + + @property + def gso_size(self): + """gso size on packet-generator interface""" + return self._gso_size + + @property + def coalesce_is_enabled(self): + """coalesce enabled on packet-generator interface""" + if self._coalesce_enabled == 0: + return "coalesce-disabled" + return "coalesce-enabled" + @property def out_path(self): """pcap file path - captured packets""" return self._out_path - @property - def in_path(self): + def get_in_path(self, worker): """ pcap file path - injected packets""" - return self._in_path + if worker is not None: + return "%s/pg%u_wrk%u_in.pcap" % (self.test.tempdir, self.pg_index, + worker) + return "%s/pg%u_in.pcap" % (self.test.tempdir, self.pg_index) @property def capture_cli(self): """CLI string to start capture on this interface""" return self._capture_cli - @property - def cap_name(self): - """capture name for this interface""" + def get_cap_name(self, worker=None): + """return capture name for this interface and given worker""" + if worker is not None: + return self._cap_name + "-worker%d" % worker return self._cap_name - @property - def input_cli(self): - """CLI string to load the injected packets""" - return self._input_cli + def get_input_cli(self, nb_replays=None, worker=None): + """return CLI string to load the injected packets""" + input_cli = "packet-generator new pcap %s source pg%u name %s" % ( + self.get_in_path(worker), self.pg_index, self.get_cap_name(worker)) + if nb_replays is not None: + return "%s limit %d" % (input_cli, nb_replays) + if worker is not None: + return "%s worker %d" % (input_cli, worker) + return input_cli @property def in_history_counter(self): @@ -76,67 +112,82 @@ class VppPGInterface(VppInterface): self._out_history_counter += 1 return v - def __init__(self, test, pg_index): + def __init__(self, test, pg_index, gso, gso_size, mode): """ Create VPP packet-generator interface """ - r = test.vapi.pg_create_interface(pg_index) - self._sw_if_index = r.sw_if_index + super().__init__(test) - super(VppPGInterface, self).__init__(test) + r = test.vapi.pg_create_interface_v2(pg_index, gso, gso_size, mode) + self.set_sw_if_index(r.sw_if_index) self._in_history_counter = 0 self._out_history_counter = 0 self._out_assert_counter = 0 self._pg_index = pg_index + self._gso_enabled = gso + self._gso_size = gso_size + self._coalesce_enabled = 0 self._out_file = "pg%u_out.pcap" % self.pg_index self._out_path = self.test.tempdir + "/" + self._out_file - self._in_file = "pg%u_in.pcap" % self.pg_index - self._in_path = self.test.tempdir + "/" + self._in_file self._capture_cli = "packet-generator capture pg%u pcap %s" % ( self.pg_index, self.out_path) - self._cap_name = "pcap%u" % self.sw_if_index - self._input_cli = \ - "packet-generator new pcap %s source pg%u name %s" % ( - self.in_path, self.pg_index, self.cap_name) + self._cap_name = "pcap%u-sw_if_index-%s" % ( + self.pg_index, self.sw_if_index) - def enable_capture(self): - """ Enable capture on this packet-generator interface""" + def rename_old_pcap_file(self, path, counter): + filename = os.path.basename(path) try: - if os.path.isfile(self.out_path): - os.rename(self.out_path, - "%s/history.[timestamp:%f].[%s-counter:%04d].%s" % - (self.test.tempdir, - time.time(), - self.name, - self.out_history_counter, - self._out_file)) - except: - pass + if os.path.isfile(path): + name = "%s/history.[timestamp:%f].[%s-counter:%04d].%s" % \ + (self.test.tempdir, + time.time(), + self.name, + counter, + filename) + self.test.logger.debug("Renaming %s->%s" % + (path, name)) + os.rename(path, name) + except OSError: + self.test.logger.debug("OSError: Could not rename %s %s" % + (path, filename)) + + def enable_capture(self): + """ Enable capture on this packet-generator interface + of at most n packets. + If n < 0, this is no limit + """ + # disable the capture to flush the capture + self.disable_capture() + self.rename_old_pcap_file(self.out_path, self.out_history_counter) # FIXME this should be an API, but no such exists atm self.test.vapi.cli(self.capture_cli) self._pcap_reader = None - def add_stream(self, pkts): + def disable_capture(self): + self.test.vapi.cli("%s disable" % self.capture_cli) + + def coalesce_enable(self): + """ Enable packet coalesce on this packet-generator interface""" + self._coalesce_enabled = 1 + self.test.vapi.pg_interface_enable_disable_coalesce(self.sw_if_index, + 1) + + def coalesce_disable(self): + """ Disable packet coalesce on this packet-generator interface""" + self._coalesce_enabled = 0 + self.test.vapi.pg_interface_enable_disable_coalesce(self.sw_if_index, + 0) + + def add_stream(self, pkts, nb_replays=None, worker=None): """ Add a stream of packets to this packet-generator :param pkts: iterable packets """ - try: - if os.path.isfile(self.in_path): - os.rename(self.in_path, - "%s/history.[timestamp:%f].[%s-counter:%04d].%s" % - (self.test.tempdir, - time.time(), - self.name, - self.in_history_counter, - self._in_file)) - except: - pass - wrpcap(self.in_path, pkts) - self.test.register_capture(self.cap_name) + wrpcap(self.get_in_path(worker), pkts) + self.test.register_pcap(self, worker) # FIXME this should be an API, but no such exists atm - self.test.vapi.cli(self.input_cli) + self.test.vapi.cli(self.get_input_cli(nb_replays, worker)) def generate_debug_aid(self, kind): """ Create a hardlink to the out file with a counter and a file @@ -210,6 +261,10 @@ class VppPGInterface(VppInterface): if len(capture.res) == expected_count: # bingo, got the packets we expected return capture + elif len(capture.res) > expected_count: + self.test.logger.error( + ppc("Unexpected packets captured:", capture)) + break else: self.test.logger.debug("Partial capture containing %s " "packets doesn't match expected " @@ -241,8 +296,6 @@ class VppPGInterface(VppInterface): if not capture or len(capture.res) == 0: # junk filtered out, we're good return - self.test.logger.error( - ppc("Unexpected packets captured:", capture)) except: pass self.generate_debug_aid("empty-assert") @@ -254,6 +307,20 @@ class VppPGInterface(VppInterface): raise AssertionError("Capture file present for interface %s" % self.name) + def wait_for_pg_stop(self): + # wait till packet-generator is stopped + # "show packet-generator" while it is still running gives this: + # Name Enabled Count Parameters + # pcap0-sw_if_inde Yes 64 limit 64, ... + # + # also have a 5-minute timeout just in case things go terribly wrong... + deadline = time.time() + 300 + while self.test.vapi.cli('show packet-generator').find("Yes") != -1: + self._test.sleep(0.01) # yield + if time.time() > deadline: + self.test.logger.debug("Timeout waiting for pg to stop") + break + def wait_for_capture_file(self, timeout=1): """ Wait until pcap capture file appears @@ -262,27 +329,52 @@ class VppPGInterface(VppInterface): :returns: True/False if the file is present or appears within timeout """ - limit = time.time() + timeout + self.wait_for_pg_stop() + deadline = time.time() + timeout if not os.path.isfile(self.out_path): self.test.logger.debug("Waiting for capture file %s to appear, " "timeout is %ss" % (self.out_path, timeout)) else: - self.test.logger.debug( - "Capture file %s already exists" % - self.out_path) + self.test.logger.debug("Capture file %s already exists" % + self.out_path) return True - while time.time() < limit: + while time.time() < deadline: if os.path.isfile(self.out_path): break - time.sleep(0) # yield + self._test.sleep(0) # yield if os.path.isfile(self.out_path): self.test.logger.debug("Capture file appeared after %fs" % - (time.time() - (limit - timeout))) + (time.time() - (deadline - timeout))) else: self.test.logger.debug("Timeout - capture file still nowhere") return False return True + def verify_enough_packet_data_in_pcap(self): + """ + Check if enough data is available in file handled by internal pcap + reader so that a whole packet can be read. + + :returns: True if enough data present, else False + """ + orig_pos = self._pcap_reader.f.tell() # save file position + enough_data = False + # read packet header from pcap + packet_header_size = 16 + caplen = None + end_pos = None + hdr = self._pcap_reader.f.read(packet_header_size) + if len(hdr) == packet_header_size: + # parse the capture length - caplen + sec, usec, caplen, wirelen = struct.unpack( + self._pcap_reader.endian + "IIII", hdr) + self._pcap_reader.f.seek(0, 2) # seek to end of file + end_pos = self._pcap_reader.f.tell() # get position at end + if end_pos >= orig_pos + len(hdr) + caplen: + enough_data = True # yay, we have enough data + self._pcap_reader.f.seek(orig_pos, 0) # restore original position + return enough_data + def wait_for_packet(self, timeout, filter_out_fn=is_ipv6_misc): """ Wait for next packet captured with a timeout @@ -295,8 +387,8 @@ class VppPGInterface(VppInterface): deadline = time.time() + timeout if self._pcap_reader is None: if not self.wait_for_capture_file(timeout): - raise Exception("Capture file %s did not appear within " - "timeout" % self.out_path) + raise CaptureTimeoutError("Capture file %s did not appear " + "within timeout" % self.out_path) while time.time() < deadline: try: self._pcap_reader = PcapReader(self.out_path) @@ -306,11 +398,20 @@ class VppPGInterface(VppInterface): "Exception in scapy.PcapReader(%s): %s" % (self.out_path, format_exc())) if not self._pcap_reader: - raise Exception("Capture file %s did not appear within " - "timeout" % self.out_path) + raise CaptureTimeoutError("Capture file %s did not appear within " + "timeout" % self.out_path) - self.test.logger.debug("Waiting for packet") - while time.time() < deadline: + poll = False + if timeout > 0: + self.test.logger.debug("Waiting for packet") + else: + poll = True + self.test.logger.debug("Polling for packet") + while time.time() < deadline or poll: + if not self.verify_enough_packet_data_in_pcap(): + self._test.sleep(0) # yield + poll = False + continue p = self._pcap_reader.recv() if p is not None: if filter_out_fn is not None and filter_out_fn(p): @@ -322,9 +423,10 @@ class VppPGInterface(VppInterface): "Packet received after %fs" % (time.time() - (deadline - timeout))) return p - time.sleep(0) # yield + self._test.sleep(0) # yield + poll = False self.test.logger.debug("Timeout - no packets received") - raise Exception("Packet didn't arrive within timeout") + raise CaptureTimeoutError("Packet didn't arrive within timeout") def create_arp_req(self): """Create ARP request applicable for this interface""" @@ -332,14 +434,16 @@ class VppPGInterface(VppInterface): ARP(op=ARP.who_has, pdst=self.local_ip4, psrc=self.remote_ip4, hwsrc=self.remote_mac)) - def create_ndp_req(self): + def create_ndp_req(self, addr=None): """Create NDP - NS applicable for this interface""" - nsma = in6_getnsma(inet_pton(socket.AF_INET6, self.local_ip6)) + if not addr: + addr = self.local_ip6 + nsma = in6_getnsma(inet_pton(socket.AF_INET6, addr)) d = inet_ntop(socket.AF_INET6, nsma) return (Ether(dst=in6_getnsmac(nsma)) / IPv6(dst=d, src=self.remote_ip6) / - ICMPv6ND_NS(tgt=self.local_ip6) / + ICMPv6ND_NS(tgt=addr) / ICMPv6NDOptSrcLLAddr(lladdr=self.remote_mac)) def resolve_arp(self, pg_interface=None): @@ -365,10 +469,6 @@ class VppPGInterface(VppInterface): pg_interface.name) return arp_reply = captured_packet.copy() # keep original for exception - # Make Dot1AD packet content recognizable to scapy - if arp_reply.type == 0x88a8: - arp_reply.type = 0x8100 - arp_reply = Ether(str(arp_reply)) try: if arp_reply[ARP].op == ARP.is_at: self.test.logger.info("VPP %s MAC address is %s " % @@ -382,19 +482,22 @@ class VppPGInterface(VppInterface): ppp("Unexpected response to ARP request:", captured_packet)) raise - def resolve_ndp(self, pg_interface=None, timeout=1): + def resolve_ndp(self, pg_interface=None, timeout=1, link_layer=False): """Resolve NDP using provided packet-generator interface :param pg_interface: interface used to resolve, if None then this interface is used :param timeout: how long to wait for response before giving up + :param link_layer: resolve for global address if False (default) + or for link-layer address if True """ if pg_interface is None: pg_interface = self + addr = self.local_ip6_ll if link_layer else self.local_ip6 self.test.logger.info("Sending NDP request for %s on port %s" % - (self.local_ip6, pg_interface.name)) - ndp_req = self.create_ndp_req() + (addr, pg_interface.name)) + ndp_req = self.create_ndp_req(addr) pg_interface.add_stream(ndp_req) pg_interface.enable_capture() self.test.pg_start() @@ -412,10 +515,6 @@ class VppPGInterface(VppInterface): "Timeout while waiting for NDP response") raise ndp_reply = captured_packet.copy() # keep original for exception - # Make Dot1AD packet content recognizable to scapy - if ndp_reply.type == 0x88a8: - ndp_reply.type = 0x8100 - ndp_reply = Ether(str(ndp_reply)) try: ndp_na = ndp_reply[ICMPv6ND_NA] opt = ndp_na[ICMPv6NDOptDstLLAddr]