| Kris Michielsen | 9107443 | 2017-06-22 13:00:20 +0200 | [diff] [blame] | 1 | """ |
| 2 | SRv6 LocalSIDs |
| 3 | |
| 4 | object abstractions for representing SRv6 localSIDs in VPP |
| 5 | """ |
| 6 | |
| 7 | from vpp_object import * |
| 8 | from socket import inet_pton, inet_ntop, AF_INET, AF_INET6 |
| 9 | |
| 10 | |
| 11 | class SRv6LocalSIDBehaviors(): |
| 12 | # from src/vnet/srv6/sr.h |
| 13 | SR_BEHAVIOR_END = 1 |
| 14 | SR_BEHAVIOR_X = 2 |
| 15 | SR_BEHAVIOR_T = 3 |
| 16 | SR_BEHAVIOR_D_FIRST = 4 # Unused. Separator in between regular and D |
| 17 | SR_BEHAVIOR_DX2 = 5 |
| 18 | SR_BEHAVIOR_DX6 = 6 |
| 19 | SR_BEHAVIOR_DX4 = 7 |
| 20 | SR_BEHAVIOR_DT6 = 8 |
| 21 | SR_BEHAVIOR_DT4 = 9 |
| 22 | SR_BEHAVIOR_LAST = 10 # Must always be the last one |
| 23 | |
| 24 | |
| 25 | class SRv6PolicyType(): |
| 26 | # from src/vnet/srv6/sr.h |
| 27 | SR_POLICY_TYPE_DEFAULT = 0 |
| 28 | SR_POLICY_TYPE_SPRAY = 1 |
| 29 | |
| 30 | |
| 31 | class SRv6PolicySteeringTypes(): |
| 32 | # from src/vnet/srv6/sr.h |
| 33 | SR_STEER_L2 = 2 |
| 34 | SR_STEER_IPV4 = 4 |
| 35 | SR_STEER_IPV6 = 6 |
| 36 | |
| 37 | |
| 38 | class VppSRv6LocalSID(VppObject): |
| 39 | """ |
| 40 | SRv6 LocalSID |
| 41 | """ |
| 42 | |
| 43 | def __init__(self, test, localsid_addr, behavior, nh_addr, end_psp, |
| 44 | sw_if_index, vlan_index, fib_table): |
| 45 | self._test = test |
| 46 | self.localsid_addr = localsid_addr |
| 47 | # keep binary format in _localsid_addr |
| 48 | self._localsid_addr = inet_pton(AF_INET6, self.localsid_addr) |
| 49 | self.behavior = behavior |
| 50 | self.nh_addr = nh_addr |
| 51 | # keep binary format in _nh_addr |
| 52 | if ':' in nh_addr: |
| 53 | # IPv6 |
| 54 | self._nh_addr = inet_pton(AF_INET6, nh_addr) |
| 55 | else: |
| 56 | # IPv4 |
| 57 | # API expects 16 octets (128 bits) |
| 58 | # last 4 octets are used for IPv4 |
| 59 | # --> prepend 12 octets |
| 60 | self._nh_addr = ('\x00' * 12) + inet_pton(AF_INET, nh_addr) |
| 61 | self.end_psp = end_psp |
| 62 | self.sw_if_index = sw_if_index |
| 63 | self.vlan_index = vlan_index |
| 64 | self.fib_table = fib_table |
| 65 | self._configured = False |
| 66 | |
| 67 | def add_vpp_config(self): |
| 68 | self._test.vapi.sr_localsid_add_del( |
| 69 | self._localsid_addr, |
| 70 | self.behavior, |
| 71 | self._nh_addr, |
| 72 | is_del=0, |
| 73 | end_psp=self.end_psp, |
| 74 | sw_if_index=self.sw_if_index, |
| 75 | vlan_index=self.vlan_index, |
| 76 | fib_table=self.fib_table) |
| 77 | self._configured = True |
| 78 | |
| 79 | def remove_vpp_config(self): |
| 80 | self._test.vapi.sr_localsid_add_del( |
| 81 | self._localsid_addr, |
| 82 | self.behavior, |
| 83 | self._nh_addr, |
| 84 | is_del=1, |
| 85 | end_psp=self.end_psp, |
| 86 | sw_if_index=self.sw_if_index, |
| 87 | vlan_index=self.vlan_index, |
| 88 | fib_table=self.fib_table) |
| 89 | self._configured = False |
| 90 | |
| 91 | def query_vpp_config(self): |
| 92 | # sr_localsids_dump API is disabled |
| 93 | # use _configured flag for now |
| 94 | return self._configured |
| 95 | |
| 96 | def __str__(self): |
| 97 | return self.object_id() |
| 98 | |
| 99 | def object_id(self): |
| 100 | return ("%d;%s,%d" |
| 101 | % (self.fib_table, |
| 102 | self.localsid_addr, |
| 103 | self.behavior)) |
| 104 | |
| 105 | |
| 106 | class VppSRv6Policy(VppObject): |
| 107 | """ |
| 108 | SRv6 Policy |
| 109 | """ |
| 110 | |
| 111 | def __init__(self, test, bsid, |
| 112 | is_encap, sr_type, weight, fib_table, |
| 113 | segments, source): |
| 114 | self._test = test |
| 115 | self.bsid = bsid |
| 116 | # keep binary format in _bsid |
| 117 | self._bsid = inet_pton(AF_INET6, bsid) |
| 118 | self.is_encap = is_encap |
| 119 | self.sr_type = sr_type |
| 120 | self.weight = weight |
| 121 | self.fib_table = fib_table |
| 122 | self.segments = segments |
| 123 | # keep binary format in _segments |
| 124 | self._segments = [] |
| 125 | for seg in segments: |
| 126 | self._segments.extend(inet_pton(AF_INET6, seg)) |
| 127 | self.n_segments = len(segments) |
| 128 | # source not passed to API |
| 129 | # self.source = inet_pton(AF_INET6, source) |
| 130 | self.source = source |
| 131 | self._configured = False |
| 132 | |
| 133 | def add_vpp_config(self): |
| 134 | self._test.vapi.sr_policy_add( |
| 135 | self._bsid, |
| 136 | self.weight, |
| 137 | self.is_encap, |
| 138 | self.sr_type, |
| 139 | self.fib_table, |
| 140 | self.n_segments, |
| 141 | self._segments) |
| 142 | self._configured = True |
| 143 | |
| 144 | def remove_vpp_config(self): |
| 145 | self._test.vapi.sr_policy_del( |
| 146 | self._bsid) |
| 147 | self._configured = False |
| 148 | |
| 149 | def query_vpp_config(self): |
| 150 | # no API to query SR Policies |
| 151 | # use _configured flag for now |
| 152 | return self._configured |
| 153 | |
| 154 | def __str__(self): |
| 155 | return self.object_id() |
| 156 | |
| 157 | def object_id(self): |
| 158 | return ("%d;%s-><%s>;%d" |
| 159 | % (self.sr_type, |
| 160 | self.bsid, |
| 161 | ','.join(self.segments), |
| 162 | self.is_encap)) |
| 163 | |
| 164 | |
| 165 | class VppSRv6Steering(VppObject): |
| 166 | """ |
| 167 | SRv6 Steering |
| 168 | """ |
| 169 | |
| 170 | def __init__(self, test, |
| 171 | bsid, |
| 172 | prefix, |
| 173 | mask_width, |
| 174 | traffic_type, |
| 175 | sr_policy_index, |
| 176 | table_id, |
| 177 | sw_if_index): |
| 178 | self._test = test |
| 179 | self.bsid = bsid |
| 180 | # keep binary format in _bsid |
| 181 | self._bsid = inet_pton(AF_INET6, bsid) |
| 182 | self.prefix = prefix |
| 183 | # keep binary format in _prefix |
| 184 | if ':' in prefix: |
| 185 | # IPv6 |
| 186 | self._prefix = inet_pton(AF_INET6, prefix) |
| 187 | else: |
| 188 | # IPv4 |
| 189 | # API expects 16 octets (128 bits) |
| 190 | # last 4 octets are used for IPv4 |
| 191 | # --> prepend 12 octets |
| 192 | self._prefix = ('\x00' * 12) + inet_pton(AF_INET, prefix) |
| 193 | self.mask_width = mask_width |
| 194 | self.traffic_type = traffic_type |
| 195 | self.sr_policy_index = sr_policy_index |
| 196 | self.sw_if_index = sw_if_index |
| 197 | self.table_id = table_id |
| 198 | self._configured = False |
| 199 | |
| 200 | def add_vpp_config(self): |
| 201 | self._test.vapi.sr_steering_add_del( |
| 202 | 0, |
| 203 | self._bsid, |
| 204 | self.sr_policy_index, |
| 205 | self.table_id, |
| 206 | self._prefix, |
| 207 | self.mask_width, |
| 208 | self.sw_if_index, |
| 209 | self.traffic_type) |
| 210 | self._configured = True |
| 211 | |
| 212 | def remove_vpp_config(self): |
| 213 | self._test.vapi.sr_steering_add_del( |
| 214 | 1, |
| 215 | self._bsid, |
| 216 | self.sr_policy_index, |
| 217 | self.table_id, |
| 218 | self._prefix, |
| 219 | self.mask_width, |
| 220 | self.sw_if_index, |
| 221 | self.traffic_type) |
| 222 | self._configured = False |
| 223 | |
| 224 | def query_vpp_config(self): |
| 225 | # no API to query steering entries |
| 226 | # use _configured flag for now |
| 227 | return self._configured |
| 228 | |
| 229 | def __str__(self): |
| 230 | return self.object_id() |
| 231 | |
| 232 | def object_id(self): |
| 233 | return ("%d;%d;%s/%d->%s" |
| 234 | % (self.table_id, |
| 235 | self.traffic_type, |
| 236 | self.prefix, |
| 237 | self.mask_width, |
| 238 | self.bsid)) |