diff options
Diffstat (limited to 'test/util.py')
| -rw-r--r-- | test/util.py | 188 |
1 files changed, 110 insertions, 78 deletions
diff --git a/test/util.py b/test/util.py index 2c24571c350..249bd864259 100644 --- a/test/util.py +++ b/test/util.py @@ -11,8 +11,12 @@ from collections import UserDict import scapy.compat from scapy.layers.l2 import Ether from scapy.layers.inet import IP -from scapy.layers.inet6 import IPv6, IPv6ExtHdrFragment, IPv6ExtHdrRouting,\ - IPv6ExtHdrHopByHop +from scapy.layers.inet6 import ( + IPv6, + IPv6ExtHdrFragment, + IPv6ExtHdrRouting, + IPv6ExtHdrHopByHop, +) from scapy.packet import Raw from scapy.utils import hexdump from scapy.utils6 import in6_mactoifaceid @@ -21,7 +25,7 @@ from io import BytesIO from vpp_papi import mac_pton # Set up an empty logger for the testcase that can be overridden as necessary -null_logger = logging.getLogger('VppTestCase.util') +null_logger = logging.getLogger("VppTestCase.util") null_logger.addHandler(logging.NullHandler()) @@ -30,14 +34,16 @@ def pr(packet): def ppp(headline, packet): - """ Return string containing headline and output of scapy packet.show() """ - return '%s\n%s\n\n%s\n' % (headline, - hexdump(packet, dump=True), - packet.show(dump=True)) + """Return string containing headline and output of scapy packet.show()""" + return "%s\n%s\n\n%s\n" % ( + headline, + hexdump(packet, dump=True), + packet.show(dump=True), + ) def ppc(headline, capture, limit=10): - """ Return string containing ppp() printout for a capture. + """Return string containing ppp() printout for a capture. :param headline: printed as first line of output :param capture: packets to print @@ -48,14 +54,17 @@ def ppc(headline, capture, limit=10): tail = "" if limit < len(capture): tail = "\nPrint limit reached, %s out of %s packets printed" % ( - limit, len(capture)) - body = "".join([ppp("Packet #%s:" % count, p) - for count, p in zip(range(0, limit), capture)]) + limit, + len(capture), + ) + body = "".join( + [ppp("Packet #%s:" % count, p) for count, p in zip(range(0, limit), capture)] + ) return "%s\n%s%s" % (headline, body, tail) def ip4_range(ip4, s, e): - tmp = ip4.rsplit('.', 1)[0] + tmp = ip4.rsplit(".", 1)[0] return ("%s.%d" % (tmp, i) for i in range(s, e)) @@ -65,14 +74,18 @@ def mcast_ip_to_mac(ip): raise ValueError("Must be multicast address.") ip_as_int = int(ip) if ip.version == 4: - mcast_mac = "01:00:5e:%02x:%02x:%02x" % ((ip_as_int >> 16) & 0x7f, - (ip_as_int >> 8) & 0xff, - ip_as_int & 0xff) + mcast_mac = "01:00:5e:%02x:%02x:%02x" % ( + (ip_as_int >> 16) & 0x7F, + (ip_as_int >> 8) & 0xFF, + ip_as_int & 0xFF, + ) else: - mcast_mac = "33:33:%02x:%02x:%02x:%02x" % ((ip_as_int >> 24) & 0xff, - (ip_as_int >> 16) & 0xff, - (ip_as_int >> 8) & 0xff, - ip_as_int & 0xff) + mcast_mac = "33:33:%02x:%02x:%02x:%02x" % ( + (ip_as_int >> 24) & 0xFF, + (ip_as_int >> 16) & 0xFF, + (ip_as_int >> 8) & 0xFF, + ip_as_int & 0xFF, + ) return mcast_mac @@ -84,8 +97,7 @@ def mk_ll_addr(mac): def ip6_normalize(ip6): - return socket.inet_ntop(socket.AF_INET6, - socket.inet_pton(socket.AF_INET6, ip6)) + return socket.inet_ntop(socket.AF_INET6, socket.inet_pton(socket.AF_INET6, ip6)) def get_core_path(tempdir): @@ -107,13 +119,14 @@ def check_core_path(logger, core_path): if corefmt.startswith("|"): logger.error( "WARNING: redirecting the core dump through a" - " filter may result in truncated dumps.") + " filter may result in truncated dumps." + ) logger.error( " You may want to check the filter settings" " or uninstall it and edit the" - " /proc/sys/kernel/core_pattern accordingly.") - logger.error( - " current core pattern is: %s" % corefmt) + " /proc/sys/kernel/core_pattern accordingly." + ) + logger.error(" current core pattern is: %s" % corefmt) class NumericConstant: @@ -136,55 +149,57 @@ class NumericConstant: class Host: - """ Generic test host "connected" to VPPs interface. """ + """Generic test host "connected" to VPPs interface.""" @property def mac(self): - """ MAC address """ + """MAC address""" return self._mac @property def bin_mac(self): - """ MAC address """ + """MAC address""" return mac_pton(self._mac) @property def ip4(self): - """ IPv4 address - string """ + """IPv4 address - string""" return self._ip4 @property def ip4n(self): - """ IPv4 address of remote host - raw, suitable as API parameter.""" + """IPv4 address of remote host - raw, suitable as API parameter.""" return socket.inet_pton(socket.AF_INET, self._ip4) @property def ip6(self): - """ IPv6 address - string """ + """IPv6 address - string""" return self._ip6 @property def ip6n(self): - """ IPv6 address of remote host - raw, suitable as API parameter.""" + """IPv6 address of remote host - raw, suitable as API parameter.""" return socket.inet_pton(socket.AF_INET6, self._ip6) @property def ip6_ll(self): - """ IPv6 link-local address - string """ + """IPv6 link-local address - string""" return self._ip6_ll @property def ip6n_ll(self): - """ IPv6 link-local address of remote host - + """IPv6 link-local address of remote host - raw, suitable as API parameter.""" return socket.inet_pton(socket.AF_INET6, self._ip6_ll) def __eq__(self, other): if isinstance(other, Host): - return (self.mac == other.mac and - self.ip4 == other.ip4 and - self.ip6 == other.ip6 and - self.ip6_ll == other.ip6_ll) + return ( + self.mac == other.mac + and self.ip4 == other.ip4 + and self.ip6 == other.ip6 + and self.ip6_ll == other.ip6_ll + ) else: return False @@ -192,10 +207,12 @@ class Host: return not self.__eq__(other) def __repr__(self): - return "Host { mac:%s ip4:%s ip6:%s ip6_ll:%s }" % (self.mac, - self.ip4, - self.ip6, - self.ip6_ll) + return "Host { mac:%s ip4:%s ip6:%s ip6_ll:%s }" % ( + self.mac, + self.ip4, + self.ip6, + self.ip6_ll, + ) def __hash__(self): return hash(self.__repr__()) @@ -207,8 +224,8 @@ class Host: self._ip6_ll = ip6_ll -class L4_Conn(): - """ L4 'connection' tied to two VPP interfaces """ +class L4_Conn: + """L4 'connection' tied to two VPP interfaces""" def __init__(self, testcase, if1, if2, af, l4proto, port1, port2): self.testcase = testcase @@ -228,22 +245,25 @@ class L4_Conn(): s1 = 1 - side src_if = self.ifs[s0] dst_if = self.ifs[s1] - layer_3 = [IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4), - IPv6(src=src_if.remote_ip6, dst=dst_if.remote_ip6)] - merged_l4args = {'sport': self.ports[s0], 'dport': self.ports[s1]} + layer_3 = [ + IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4), + IPv6(src=src_if.remote_ip6, dst=dst_if.remote_ip6), + ] + merged_l4args = {"sport": self.ports[s0], "dport": self.ports[s1]} merged_l4args.update(l4args) - p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / - layer_3[is_ip6] / - self.l4proto(**merged_l4args) / - Raw(payload)) + p = ( + Ether(dst=src_if.local_mac, src=src_if.remote_mac) + / layer_3[is_ip6] + / self.l4proto(**merged_l4args) + / Raw(payload) + ) return p def send(self, side, flags=None, payload=""): l4args = {} if flags is not None: - l4args['flags'] = flags - self.ifs[side].add_stream(self.pkt(side, - l4args=l4args, payload=payload)) + l4args["flags"] = flags + self.ifs[side].add_stream(self.pkt(side, l4args=l4args, payload=payload)) self.ifs[1 - side].enable_capture() self.testcase.pg_start() @@ -285,8 +305,8 @@ def fragment_rfc791(packet, fragsize, logger=null_logger): pre_ip_len = len(packet) - len(packet[IP]) ip_header_len = packet[IP].ihl * 4 hex_packet = scapy.compat.raw(packet) - hex_headers = hex_packet[:(pre_ip_len + ip_header_len)] - hex_payload = hex_packet[(pre_ip_len + ip_header_len):] + hex_headers = hex_packet[: (pre_ip_len + ip_header_len)] + hex_payload = hex_packet[(pre_ip_len + ip_header_len) :] pkts = [] ihl = packet[IP].ihl @@ -294,14 +314,14 @@ def fragment_rfc791(packet, fragsize, logger=null_logger): nfb = int((fragsize - pre_ip_len - ihl * 4) / 8) fo = packet[IP].frag - p = packet.__class__(hex_headers + hex_payload[:nfb * 8]) + p = packet.__class__(hex_headers + hex_payload[: nfb * 8]) p[IP].flags = "MF" p[IP].frag = fo p[IP].len = ihl * 4 + nfb * 8 del p[IP].chksum pkts.append(p) - p = packet.__class__(hex_headers + hex_payload[nfb * 8:]) + p = packet.__class__(hex_headers + hex_payload[nfb * 8 :]) p[IP].len = otl - nfb * 8 p[IP].frag = fo + nfb del p[IP].chksum @@ -345,15 +365,19 @@ def fragment_rfc8200(packet, identification, fragsize, logger=null_logger): routing_hdr = counter elif l.__class__ is IPv6ExtHdrHopByHop: hop_by_hop_hdr = counter - elif seen_ipv6 and not upper_layer and \ - not l.__class__.__name__.startswith('IPv6ExtHdr'): + elif ( + seen_ipv6 + and not upper_layer + and not l.__class__.__name__.startswith("IPv6ExtHdr") + ): upper_layer = counter counter = counter + 1 l = packet.getlayer(counter) logger.debug( - "Layers seen: IPv6(#%s), Routing(#%s), HopByHop(#%s), upper(#%s)" % - (ipv6_nr, routing_hdr, hop_by_hop_hdr, upper_layer)) + "Layers seen: IPv6(#%s), Routing(#%s), HopByHop(#%s), upper(#%s)" + % (ipv6_nr, routing_hdr, hop_by_hop_hdr, upper_layer) + ) if upper_layer is None: raise Exception("Upper layer header not found in IPv6 packet") @@ -379,18 +403,27 @@ def fragment_rfc8200(packet, identification, fragsize, logger=null_logger): logger.debug(ppp("Fragment header:", fragment_ext_hdr)) len_ext_and_upper_layer_payload = len(ext_and_upper_layer.payload) - if not len_ext_and_upper_layer_payload and \ - hasattr(ext_and_upper_layer, "data"): + if not len_ext_and_upper_layer_payload and hasattr(ext_and_upper_layer, "data"): len_ext_and_upper_layer_payload = len(ext_and_upper_layer.data) - if len(per_fragment_headers) + len(fragment_ext_hdr) +\ - len(ext_and_upper_layer) - len_ext_and_upper_layer_payload\ - > fragsize: - raise Exception("Cannot fragment this packet - MTU too small " - "(%s, %s, %s, %s, %s)" % ( - len(per_fragment_headers), len(fragment_ext_hdr), - len(ext_and_upper_layer), - len_ext_and_upper_layer_payload, fragsize)) + if ( + len(per_fragment_headers) + + len(fragment_ext_hdr) + + len(ext_and_upper_layer) + - len_ext_and_upper_layer_payload + > fragsize + ): + raise Exception( + "Cannot fragment this packet - MTU too small " + "(%s, %s, %s, %s, %s)" + % ( + len(per_fragment_headers), + len(fragment_ext_hdr), + len(ext_and_upper_layer), + len_ext_and_upper_layer_payload, + fragsize, + ) + ) orig_nh = packet[IPv6].nh p = per_fragment_headers @@ -399,7 +432,7 @@ def fragment_rfc8200(packet, identification, fragsize, logger=null_logger): p = p / fragment_ext_hdr del p[IPv6ExtHdrFragment].nh first_payload_len_nfb = int((fragsize - len(p)) / 8) - p = p / Raw(hex_payload[:first_payload_len_nfb * 8]) + p = p / Raw(hex_payload[: first_payload_len_nfb * 8]) del p[IPv6].plen p[IPv6ExtHdrFragment].nh = orig_nh p[IPv6ExtHdrFragment].id = identification @@ -417,7 +450,7 @@ def fragment_rfc8200(packet, identification, fragsize, logger=null_logger): p = p / fragment_ext_hdr del p[IPv6ExtHdrFragment].nh l_nfb = int((fragsize - len(p)) / 8) - p = p / Raw(hex_payload[offset:offset + l_nfb * 8]) + p = p / Raw(hex_payload[offset : offset + l_nfb * 8]) p[IPv6ExtHdrFragment].nh = orig_nh p[IPv6ExtHdrFragment].id = identification p[IPv6ExtHdrFragment].offset = int(offset / 8) @@ -437,11 +470,11 @@ def reassemble4_core(listoffragments, return_ip): first = listoffragments[0] buffer.seek(20) for pkt in listoffragments: - buffer.seek(pkt[IP].frag*8) + buffer.seek(pkt[IP].frag * 8) buffer.write(bytes(pkt[IP].payload)) first.len = len(buffer.getvalue()) + 20 first.flags = 0 - del(first.chksum) + del first.chksum if return_ip: header = bytes(first[IP])[:20] return first[IP].__class__(header + buffer.getvalue()) @@ -472,8 +505,7 @@ def recursive_dict_merge(dict_base, dict_update): for key in dict_update: if key in dict_base: if type(dict_update[key]) is dict: - dict_base[key] = recursive_dict_merge(dict_base[key], - dict_update[key]) + dict_base[key] = recursive_dict_merge(dict_base[key], dict_update[key]) else: dict_base[key] = dict_update[key] else: |