aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/ip/ip_packet.h
blob: d3f3de771bcf0d8cf0bf2c3406639859c7a99aba (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180

/*
 * Copyright (c) 2015 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.
 */
/*
 * ip/ip_packet.h: packet format common between ip4 & ip6
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_ip_packet_h
#define included_ip_packet_h

#include <vppinfra/byte_order.h>
#include <vppinfra/error.h>

typedef enum ip_protocol
{
#define ip_protocol(n,s) IP_PROTOCOL_##s = n,
#include "protocols.def"
#undef ip_protocol
} ip_protocol_t;

/* TCP/UDP ports. */
typedef enum
{
#define ip_port(s,n) IP_PORT_##s = n,
#include "ports.def"
#undef ip_port
} ip_port_t;

/* Classifies protocols into UDP, ICMP or other. */
typedef enum
{
  IP_BUILTIN_PROTOCOL_UDP,
  IP_BUILTIN_PROTOCOL_ICMP,
  IP_BUILTIN_PROTOCOL_UNKNOWN,
} ip_builtin_protocol_t;

#define foreach_ip_builtin_multicast_group	\
  _ (1, all_hosts_on_subnet)			\
  _ (2, all_routers_on_subnet)			\
  _ (4, dvmrp)					\
  _ (5, ospf_all_routers)			\
  _ (6, ospf_designated_routers)		\
  _ (13, pim)					\
  _ (18, vrrp)					\
  _ (102, hsrp)					\
  _ (22, igmp_v3)

typedef enum
{
#define _(n,f) IP_MULTICAST_GROUP_##f = n,
  foreach_ip_builtin_multicast_group
#undef _
} ip_multicast_group_t;

/* IP checksum support. */

/* Incremental checksum update. */
typedef uword ip_csum_t;

always_inline ip_csum_t
ip_csum_with_carry (ip_csum_t sum, ip_csum_t x)
{
  ip_csum_t t = sum + x;
  return t + (t < x);
}

/* Update checksum changing field at even byte offset from x -> 0. */
always_inline ip_csum_t
ip_csum_add_even (ip_csum_t c, ip_csum_t x)
{
  ip_csum_t d;

  d = c - x;

  /* Fold in carry from high bit. */
  d -= d > c;

  ASSERT (ip_csum_with_carry (d, x) == c);

  return d;
}

/* Update checksum changing field at even byte offset from 0 -> x. */
always_inline ip_csum_t
ip_csum_sub_even (ip_csum_t c, ip_csum_t x)
{
  return ip_csum_with_carry (c, x);
}

always_inline ip_csum_t
ip_csum_update_inline (ip_csum_t sum, ip_csum_t old, ip_csum_t new,
		       u32 field_byte_offset, u32 field_n_bytes)
{
  /* For even 1-byte fields on big-endian and odd 1-byte fields on little endian
     we need to shift byte into place for checksum. */
  if ((field_n_bytes % 2)
      && (field_byte_offset % 2) == CLIB_ARCH_IS_LITTLE_ENDIAN)
    {
      old = old << 8;
      new = new << 8;
    }
  sum = ip_csum_sub_even (sum, old);
  sum = ip_csum_add_even (sum, new);
  return sum;
}

#define ip_csum_update(sum,old,new,type,field)			\
  ip_csum_update_inline ((sum), (old), (new),			\
			 STRUCT_OFFSET_OF (type, field),	\
			 STRUCT_SIZE_OF (type, field))

always_inline u16
ip_csum_fold (ip_csum_t c)
{
  /* Reduce to 16 bits. */
#if uword_bits == 64
  c = (c & (ip_csum_t) 0xffffffff) + (c >> (ip_csum_t) 32);
  c = (c & 0xffff) + (c >> 16);
#endif

  c = (c & 0xffff) + (c >> 16);
  c = (c & 0xffff) + (c >> 16);

  return c;
}

/* Copy data and checksum at the same time. */
ip_csum_t ip_csum_and_memcpy (ip_csum_t sum, void *dst, void *src,
			      uword n_bytes);

always_inline u16
ip_csum_and_memcpy_fold (ip_csum_t sum, void *dst)
{
  return ip_csum_fold (sum);
}

/* Checksum routine. */
ip_csum_t ip_incremental_checksum (ip_csum_t sum, void *data, uword n_bytes);

#endif /* included_ip_packet_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
s="bp">True if p.haslayer(IPv6ExtHdrHopByHop): for o in p[IPv6ExtHdrHopByHop].options: if isinstance(o, RouterAlert): return True return False class TestIP6VrfMultiInst(VppTestCase): """ IP6 VRF Multi-instance Test Case """ @classmethod def setUpClass(cls): """ Perform standard class setup (defined by class method setUpClass in class VppTestCase) before running the test case, set test case related variables and configure VPP. """ super(TestIP6VrfMultiInst, cls).setUpClass() # Test variables cls.hosts_per_pg = 5 cls.nr_of_vrfs = 5 cls.pg_ifs_per_vrf = 3 try: # Create pg interfaces cls.create_pg_interfaces( range(cls.nr_of_vrfs * cls.pg_ifs_per_vrf)) # Packet flows mapping pg0 -> pg1, pg2 etc. cls.flows = dict() for i in range(len(cls.pg_interfaces)): multiplicand = i / cls.pg_ifs_per_vrf pg_list = [ cls.pg_interfaces[multiplicand * cls.pg_ifs_per_vrf + j] for j in range(cls.pg_ifs_per_vrf) if (multiplicand * cls.pg_ifs_per_vrf + j) != i] cls.flows[cls.pg_interfaces[i]] = pg_list # Packet sizes - jumbo packet (9018 bytes) skipped cls.pg_if_packet_sizes = [64, 512, 1518] # Set up all interfaces for pg_if in cls.pg_interfaces: pg_if.admin_up() pg_if.generate_remote_hosts(cls.hosts_per_pg) # Create list of VRFs cls.vrf_list = list() # Create list of reset VRFs cls.vrf_reset_list = list() # Create list of pg_interfaces in VRFs cls.pg_in_vrf = list() # Create list of pg_interfaces not in BDs cls.pg_not_in_vrf = [pg_if for pg_if in cls.pg_interfaces] # Create mapping of pg_interfaces to VRF IDs cls.pg_if_by_vrf_id = dict() for i in range(cls.nr_of_vrfs): vrf_id = i + 1 pg_list = [ cls.pg_interfaces[i * cls.pg_ifs_per_vrf + j] for j in range(cls.pg_ifs_per_vrf)] cls.pg_if_by_vrf_id[vrf_id] = pg_list except Exception: super(TestIP6VrfMultiInst, cls).tearDownClass() raise def setUp(self): """ Clear trace and packet infos before running each test. """ super(TestIP6VrfMultiInst, self).setUp() self.reset_packet_infos() def tearDown(self): """ Show various debug prints after each test. """ super(TestIP6VrfMultiInst, self).tearDown() if not self.vpp_dead: self.logger.info(self.vapi.ppcli("show ip6 fib")) self.logger.info(self.vapi.ppcli("show ip6 neighbors")) def create_vrf_and_assign_interfaces(self, count, start=1): """ Create required number of FIB tables / VRFs, put 3 l2-pg interfaces to every FIB table / VRF. :param int count: Number of FIB tables / VRFs to be created. :param int start: Starting number of the FIB table / VRF ID. \ (Default value = 1) """ for i in range(count): vrf_id = i + start pg_if = self.pg_if_by_vrf_id[vrf_id][0] dest_addr = pg_if.remote_hosts[0].ip6n dest_addr_len = 64 self.vapi.ip_add_del_route( dest_addr, dest_addr_len, pg_if.local_ip6n, is_ipv6=1, table_id=vrf_id, create_vrf_if_needed=1, is_multipath=1) self.logger.info("IPv6 VRF ID %d created" % vrf_id) if vrf_id not in self.vrf_list: self.vrf_list.append(vrf_id) if vrf_id in self.vrf_reset_list: self.vrf_reset_list.remove(vrf_id) for j in range(self.pg_ifs_per_vrf): pg_if = self.pg_if_by_vrf_id[vrf_id][j] pg_if.set_table_ip6(vrf_id) self.logger.info("pg-interface %s added to IPv6 VRF ID %d" % (pg_if.name, vrf_id)) if pg_if not in self.pg_in_vrf: self.pg_in_vrf.append(pg_if) if pg_if in self.pg_not_in_vrf: self.pg_not_in_vrf.remove(pg_if) pg_if.config_ip6() pg_if.disable_ipv6_ra() pg_if.configure_ipv6_neighbors() self.logger.debug(self.vapi.ppcli("show ip6 fib")) self.logger.debug(self.vapi.ppcli("show ip6 neighbors")) def reset_vrf(self, vrf_id): """ Reset required FIB table / VRF. :param int vrf_id: The FIB table / VRF ID to be reset. """ # self.vapi.reset_vrf(vrf_id, is_ipv6=1) self.vapi.reset_fib(vrf_id, is_ipv6=1) if vrf_id in self.vrf_list: self.vrf_list.remove(vrf_id) if vrf_id not in self.vrf_reset_list: self.vrf_reset_list.append(vrf_id) for j in range(self.pg_ifs_per_vrf): pg_if = self.pg_if_by_vrf_id[vrf_id][j] pg_if.unconfig_ip6() if pg_if in self.pg_in_vrf: self.pg_in_vrf.remove(pg_if) if pg_if not in self.pg_not_in_vrf: self.pg_not_in_vrf.append(pg_if) self.logger.info("IPv6 VRF ID %d reset" % vrf_id) self.logger.debug(self.vapi.ppcli("show ip6 fib")) self.logger.debug(self.vapi.ppcli("show ip6 neighbors")) def create_stream(self, src_if, packet_sizes): """ Create input packet stream for defined interface using hosts list. :param object src_if: Interface to create packet stream for. :param list packet_sizes: List of required packet sizes. :return: Stream of packets. """ pkts = [] src_hosts = src_if.remote_hosts for dst_if in self.flows[src_if]: for dst_host in dst_if.remote_hosts: src_host = random.choice(src_hosts) pkt_info = self.create_packet_info(src_if, dst_if) payload = self.info_to_payload(pkt_info) p = (Ether(dst=src_if.local_mac, src=src_host.mac) / IPv6(src=src_host.ip6, dst=dst_host.ip6) / UDP(sport=1234, dport=1234) / Raw(payload)) pkt_info.data = p.copy() size = random.choice(packet_sizes) self.extend_packet(p, size) pkts.append(p) self.logger.debug("Input stream created for port %s. Length: %u pkt(s)" % (src_if.name, len(pkts))) return pkts def verify_capture(self, pg_if, capture): """ Verify captured input packet stream for defined interface. :param object pg_if: Interface to verify captured packet stream for. :param list capture: Captured packet stream. """ last_info = dict() for i in self.pg_interfaces: last_info[i.sw_if_index] = None dst_sw_if_index = pg_if.sw_if_index for packet in capture: try: ip = packet[IPv6] udp = packet[UDP] payload_info = self.payload_to_info(str(packet[Raw])) packet_index = payload_info.index self.assertEqual(payload_info.dst, dst_sw_if_index) self.logger.debug("Got packet on port %s: src=%u (id=%u)" % (pg_if.name, payload_info.src, packet_index)) next_info = self.get_next_packet_info_for_interface2( payload_info.src, dst_sw_if_index, last_info[payload_info.src]) last_info[payload_info.src] = next_info self.assertIsNotNone(next_info) self.assertEqual(packet_index, next_info.index) saved_packet = next_info.data # Check standard fields self.assertEqual(ip.src, saved_packet[IPv6].src) self.assertEqual(ip.dst, saved_packet[IPv6].dst) self.assertEqual(udp.sport, saved_packet[UDP].sport) self.assertEqual(udp.dport, saved_packet[UDP].dport) except: self.logger.error(ppp("Unexpected or invalid packet:", packet)) raise for i in self.pg_interfaces: remaining_packet = self.get_next_packet_info_for_interface2( i, dst_sw_if_index, last_info[i.sw_if_index]) self.assertIsNone( remaining_packet, "Port %u: Packet expected from source %u didn't arrive" % (dst_sw_if_index, i.sw_if_index)) def verify_vrf(self, vrf_id): """ Check if the FIB table / VRF ID is configured. :param int vrf_id: The FIB table / VRF ID to be verified. :return: 1 if the FIB table / VRF ID is configured, otherwise return 0. """ ip6_fib_dump = self.vapi.ip6_fib_dump() vrf_exist = False vrf_count = 0 for ip6_fib_details in ip6_fib_dump: if ip6_fib_details[2] == vrf_id: if not vrf_exist: vrf_exist = True addr = inet_ntop(socket.AF_INET6, ip6_fib_details[4]) addrtype = in6_getAddrType(addr) vrf_count += 1 if addrtype == IPV6_ADDR_UNICAST else 0 if not vrf_exist and vrf_count == 0: self.logger.info("IPv6 VRF ID %d is not configured" % vrf_id) return VRF_NOT_CONFIGURED elif vrf_exist and vrf_count == 0: self.logger.info("IPv6 VRF ID %d has been reset" % vrf_id) return VRF_RESET else: self.logger.info("IPv6 VRF ID %d is configured" % vrf_id) return VRF_CONFIGURED def run_verify_test(self): """ Create packet streams for all configured l2-pg interfaces, send all \ prepared packet streams and verify that: - all packets received correctly on all pg-l2 interfaces assigned to bridge domains - no packet received on all pg-l2 interfaces not assigned to bridge domains :raise RuntimeError: If no packet captured on l2-pg interface assigned to the bridge domain or if any packet is captured on l2-pg interface not assigned to the bridge domain. """ # Test # Create incoming packet streams for packet-generator interfaces for pg_if in self.pg_interfaces: pkts = self.create_stream(pg_if, self.pg_if_packet_sizes) pg_if.add_stream(pkts) # Enable packet capture and start packet sending self.pg_enable_capture(self.pg_interfaces) self.pg_start() # Verify # Verify outgoing packet streams per packet-generator interface for pg_if in self.pg_interfaces: if pg_if in self.pg_in_vrf: capture = pg_if.get_capture(remark="interface is in VRF") self.verify_capture(pg_if, capture) elif pg_if in self.pg_not_in_vrf: pg_if.assert_nothing_captured(remark="interface is not in VRF", filter_out_fn=is_ipv6_misc_ext) self.logger.debug("No capture for interface %s" % pg_if.name) else: raise Exception("Unknown interface: %s" % pg_if.name) def test_ip6_vrf_01(self): """ IP6 VRF Multi-instance test 1 - create 4 VRFs """ # Config 1 # Create 4 VRFs self.create_vrf_and_assign_interfaces(4) # Verify 1 for vrf_id in self.vrf_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_CONFIGURED) # Test 1 self.run_verify_test() def test_ip6_vrf_02(self): """ IP6 VRF Multi-instance test 2 - reset 2 VRFs """ # Config 2 # Delete 2 VRFs self.reset_vrf(1) self.reset_vrf(2) # Verify 2 for vrf_id in self.vrf_reset_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_RESET) for vrf_id in self.vrf_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_CONFIGURED) # Test 2 self.run_verify_test() # Reset routes learned from ICMPv6 Neighbor Discovery for vrf_id in self.vrf_reset_list: self.reset_vrf(vrf_id) def test_ip6_vrf_03(self): """ IP6 VRF Multi-instance 3 - add 2 VRFs """ # Config 3 # Add 1 of reset VRFs and 1 new VRF self.create_vrf_and_assign_interfaces(1) self.create_vrf_and_assign_interfaces(1, start=5) # Verify 3 for vrf_id in self.vrf_reset_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_RESET) for vrf_id in self.vrf_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_CONFIGURED) # Test 3 self.run_verify_test() # Reset routes learned from ICMPv6 Neighbor Discovery for vrf_id in self.vrf_reset_list: self.reset_vrf(vrf_id) def test_ip6_vrf_04(self): """ IP6 VRF Multi-instance test 4 - reset 4 VRFs """ # Config 4 # Reset all VRFs (i.e. no VRF except VRF=0 created) for i in range(len(self.vrf_list)): self.reset_vrf(self.vrf_list[0]) # Verify 4 for vrf_id in self.vrf_reset_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_RESET) for vrf_id in self.vrf_list: self.assertEqual(self.verify_vrf(vrf_id), VRF_CONFIGURED) # Test 4 self.run_verify_test() if __name__ == '__main__': unittest.main(testRunner=VppTestRunner)