Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef __SPGW__ |
| 18 | #define __SPGW__ |
| 19 | |
| 20 | #define DEFAULT_PDR_CTR_ID 0 |
| 21 | #define DEFAULT_FAR_ID 0 |
| 22 | |
| 23 | #ifndef MAX_UES |
| 24 | #define MAX_UES 1024 |
| 25 | #endif // MAX_UES |
| 26 | #define MAX_INTERFACES 128 |
| 27 | |
| 28 | #define MAX_UPLINK_PDRS MAX_UES |
| 29 | #define MAX_DOWNLINK_PDRS MAX_UES |
| 30 | #define MAX_PDR_COUNTERS 2 * MAX_UES |
| 31 | #define MAX_FARS 2 * MAX_UES |
| 32 | |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 33 | control DecapGtpu(inout parsed_headers_t hdr, |
| 34 | inout fabric_metadata_t fabric_md) { |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 35 | @hidden |
| 36 | action decap_inner_common() { |
| 37 | // Correct parser-set metadata to use the inner header values |
| 38 | fabric_md.ip_eth_type = ETHERTYPE_IPV4; |
| 39 | fabric_md.ip_proto = hdr.inner_ipv4.protocol; |
| 40 | fabric_md.ipv4_src_addr = hdr.inner_ipv4.src_addr; |
| 41 | fabric_md.ipv4_dst_addr = hdr.inner_ipv4.dst_addr; |
| 42 | fabric_md.l4_sport = fabric_md.inner_l4_sport; |
| 43 | fabric_md.l4_dport = fabric_md.inner_l4_dport; |
| 44 | // Move GTPU and inner L3 headers out |
| 45 | hdr.ipv4 = hdr.inner_ipv4; |
| 46 | hdr.inner_ipv4.setInvalid(); |
| 47 | hdr.gtpu.setInvalid(); |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 48 | hdr.gtpu_options.setInvalid(); |
| 49 | hdr.gtpu_ext_psc.setInvalid(); |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 50 | } |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 51 | @hidden |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 52 | action decap_inner_tcp() { |
| 53 | decap_inner_common(); |
| 54 | hdr.udp.setInvalid(); |
| 55 | hdr.tcp = hdr.inner_tcp; |
| 56 | hdr.inner_tcp.setInvalid(); |
| 57 | } |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 58 | @hidden |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 59 | action decap_inner_udp() { |
| 60 | decap_inner_common(); |
| 61 | hdr.udp = hdr.inner_udp; |
| 62 | hdr.inner_udp.setInvalid(); |
| 63 | } |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 64 | @hidden |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 65 | action decap_inner_icmp() { |
| 66 | decap_inner_common(); |
| 67 | hdr.udp.setInvalid(); |
| 68 | hdr.icmp = hdr.inner_icmp; |
| 69 | hdr.inner_icmp.setInvalid(); |
| 70 | } |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 71 | @hidden |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 72 | action decap_inner_unknown() { |
| 73 | decap_inner_common(); |
| 74 | hdr.udp.setInvalid(); |
| 75 | } |
| 76 | @hidden |
| 77 | table decap_gtpu { |
| 78 | key = { |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 79 | hdr.inner_tcp.isValid() : exact; |
| 80 | hdr.inner_udp.isValid() : exact; |
| 81 | hdr.inner_icmp.isValid() : exact; |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 82 | } |
| 83 | actions = { |
| 84 | decap_inner_tcp; |
| 85 | decap_inner_udp; |
| 86 | decap_inner_icmp; |
| 87 | decap_inner_unknown; |
| 88 | } |
| 89 | const default_action = decap_inner_unknown; |
| 90 | const entries = { |
| 91 | (true, false, false) : decap_inner_tcp(); |
| 92 | (false, true, false) : decap_inner_udp(); |
| 93 | (false, false, true) : decap_inner_icmp(); |
| 94 | } |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 95 | } |
| 96 | apply { |
| 97 | decap_gtpu.apply(); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | |
| 102 | control SpgwIngress(inout parsed_headers_t hdr, |
| 103 | inout fabric_metadata_t fabric_md, |
| 104 | inout standard_metadata_t standard_metadata) { |
| 105 | |
| 106 | //=============================// |
| 107 | //===== Misc Things ======// |
| 108 | //=============================// |
Carmelo Cascone | db34737 | 2021-05-26 19:30:30 +0200 | [diff] [blame] | 109 | |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 110 | counter(MAX_PDR_COUNTERS, CounterType.packets_and_bytes) pdr_counter; |
| 111 | |
| 112 | DecapGtpu() decap_gtpu_from_dbuf; |
| 113 | DecapGtpu() decap_gtpu; |
| 114 | |
| 115 | |
| 116 | //=============================// |
| 117 | //===== Interface Tables ======// |
| 118 | //=============================// |
| 119 | |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 120 | action load_iface(spgw_interface_t src_iface, slice_id_t slice_id) { |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 121 | // Interface type can be access, core, from_dbuf (see InterfaceType enum) |
| 122 | fabric_md.spgw.src_iface = src_iface; |
| 123 | fabric_md.spgw.skip_spgw = _FALSE; |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 124 | fabric_md.slice_id = slice_id; |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 125 | } |
| 126 | action iface_miss() { |
| 127 | fabric_md.spgw.src_iface = SPGW_IFACE_UNKNOWN; |
| 128 | fabric_md.spgw.skip_spgw = _TRUE; |
| 129 | } |
| 130 | |
| 131 | // TODO: check also that gtpu.msgtype == GTP_GPDU... somewhere |
| 132 | table interfaces { |
| 133 | key = { |
| 134 | hdr.ipv4.dst_addr : lpm @name("ipv4_dst_addr"); // outermost header |
| 135 | hdr.gtpu.isValid() : exact @name("gtpu_is_valid"); |
| 136 | } |
| 137 | actions = { |
| 138 | load_iface; |
| 139 | @defaultonly iface_miss; |
| 140 | } |
| 141 | const default_action = iface_miss(); |
| 142 | size = MAX_INTERFACES; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | //=============================// |
| 147 | //===== PDR Tables ======// |
| 148 | //=============================// |
ersuneetsingh | c78a251 | 2021-03-25 21:17:29 -0300 | [diff] [blame] | 149 | action load_pdr(pdr_ctr_id_t ctr_id, |
| 150 | far_id_t far_id, |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 151 | bit<1> needs_gtpu_decap, |
| 152 | tc_t tc) { |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 153 | fabric_md.spgw.ctr_id = ctr_id; |
| 154 | fabric_md.spgw.far_id = far_id; |
| 155 | fabric_md.spgw.needs_gtpu_decap = (_BOOL)needs_gtpu_decap; |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 156 | fabric_md.tc = tc; |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 157 | } |
| 158 | |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 159 | action load_pdr_qos(pdr_ctr_id_t ctr_id, |
| 160 | far_id_t far_id, |
| 161 | bit<1> needs_gtpu_decap, |
| 162 | // Used to push QFI, valid for 5G traffic only |
| 163 | bit<1> needs_qfi_push, |
| 164 | qfi_t qfi, |
| 165 | tc_t tc) { |
| 166 | load_pdr(ctr_id, far_id, needs_gtpu_decap, tc); |
| 167 | fabric_md.spgw.qfi = qfi; |
| 168 | fabric_md.spgw.needs_qfi_push = (_BOOL)needs_qfi_push; |
ersuneetsingh | c78a251 | 2021-03-25 21:17:29 -0300 | [diff] [blame] | 169 | } |
| 170 | |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 171 | // These two tables scale well and cover the average case PDR |
| 172 | table downlink_pdrs { |
| 173 | key = { |
| 174 | // only available ipv4 header |
| 175 | hdr.ipv4.dst_addr : exact @name("ue_addr"); |
| 176 | } |
| 177 | actions = { |
| 178 | load_pdr; |
ersuneetsingh | c78a251 | 2021-03-25 21:17:29 -0300 | [diff] [blame] | 179 | load_pdr_qos; |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 180 | } |
| 181 | size = MAX_DOWNLINK_PDRS; |
| 182 | } |
| 183 | |
| 184 | table uplink_pdrs { |
| 185 | key = { |
| 186 | hdr.ipv4.dst_addr : exact @name("tunnel_ipv4_dst"); |
| 187 | hdr.gtpu.teid : exact @name("teid"); |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 188 | // Match valid only for 5G traffic |
| 189 | hdr.gtpu_ext_psc.isValid() : exact @name("has_qfi"); |
| 190 | // QFI metadata is 0 when gptu_ext_psc is invalid. |
| 191 | fabric_md.spgw.qfi : exact @name("qfi"); |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 192 | } |
| 193 | actions = { |
| 194 | load_pdr; |
ersuneetsingh | c78a251 | 2021-03-25 21:17:29 -0300 | [diff] [blame] | 195 | load_pdr_qos; |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 196 | } |
| 197 | size = MAX_UPLINK_PDRS; |
| 198 | } |
| 199 | |
| 200 | //=============================// |
| 201 | //===== FAR Tables ======// |
| 202 | //=============================// |
| 203 | |
| 204 | action load_normal_far(bit<1> drop, |
| 205 | bit<1> notify_cp) { |
| 206 | // general far attributes |
| 207 | fabric_md.skip_forwarding = (_BOOL)drop; |
| 208 | fabric_md.skip_next = (_BOOL)drop; |
| 209 | fabric_md.spgw.notify_spgwc = (_BOOL)notify_cp; |
| 210 | } |
| 211 | action load_tunnel_far(bit<1> drop, |
| 212 | bit<1> notify_cp, |
| 213 | bit<16> tunnel_src_port, |
| 214 | bit<32> tunnel_src_addr, |
| 215 | bit<32> tunnel_dst_addr, |
| 216 | teid_t teid) { |
| 217 | // general far attributes |
| 218 | fabric_md.skip_forwarding = (_BOOL)drop; |
| 219 | fabric_md.skip_next = (_BOOL)drop; |
| 220 | fabric_md.spgw.notify_spgwc = (_BOOL)notify_cp; |
| 221 | // GTP tunnel attributes |
| 222 | fabric_md.spgw.needs_gtpu_encap = _TRUE; |
| 223 | fabric_md.spgw.teid = teid; |
| 224 | fabric_md.spgw.tunnel_src_port = tunnel_src_port; |
| 225 | fabric_md.spgw.tunnel_src_addr = tunnel_src_addr; |
| 226 | fabric_md.spgw.tunnel_dst_addr = tunnel_dst_addr; |
| 227 | // update metadata for correct routing/hashing |
| 228 | fabric_md.ipv4_src_addr = tunnel_src_addr; |
| 229 | fabric_md.ipv4_dst_addr = tunnel_dst_addr; |
| 230 | fabric_md.l4_sport = tunnel_src_port; |
| 231 | fabric_md.l4_dport = UDP_PORT_GTPU; |
| 232 | } |
| 233 | |
| 234 | action load_dbuf_far(bit<1> drop, |
| 235 | bit<1> notify_cp, |
| 236 | bit<16> tunnel_src_port, |
| 237 | bit<32> tunnel_src_addr, |
| 238 | bit<32> tunnel_dst_addr, |
| 239 | teid_t teid) { |
| 240 | load_tunnel_far(drop, notify_cp, tunnel_src_port, |
| 241 | tunnel_src_addr, tunnel_dst_addr, teid); |
| 242 | fabric_md.spgw.skip_egress_pdr_ctr = _TRUE; |
| 243 | } |
| 244 | |
| 245 | table fars { |
| 246 | key = { |
| 247 | fabric_md.spgw.far_id : exact @name("far_id"); |
| 248 | } |
| 249 | actions = { |
| 250 | load_normal_far; |
| 251 | load_tunnel_far; |
| 252 | load_dbuf_far; |
| 253 | } |
| 254 | // default is drop and don't notify CP |
| 255 | const default_action = load_normal_far(1, 0); |
| 256 | size = MAX_FARS; |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | |
| 260 | //=============================// |
| 261 | //===== Apply Block ======// |
| 262 | //=============================// |
| 263 | apply { |
| 264 | |
| 265 | // Interfaces |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 266 | if (interfaces.apply().hit) { |
| 267 | if (fabric_md.spgw.src_iface == SPGW_IFACE_FROM_DBUF) { |
| 268 | decap_gtpu_from_dbuf.apply(hdr, fabric_md); |
| 269 | } |
| 270 | // PDRs |
| 271 | if (hdr.gtpu.isValid()) { |
| 272 | uplink_pdrs.apply(); |
| 273 | } else { |
| 274 | downlink_pdrs.apply(); |
| 275 | } |
| 276 | if (fabric_md.spgw.src_iface != SPGW_IFACE_FROM_DBUF) { |
| 277 | pdr_counter.count(fabric_md.spgw.ctr_id); |
| 278 | } |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 279 | |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 280 | // GTPU Decapsulate |
Carmelo Cascone | db34737 | 2021-05-26 19:30:30 +0200 | [diff] [blame] | 281 | if (fabric_md.spgw.needs_gtpu_decap == _TRUE) { |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 282 | decap_gtpu.apply(hdr, fabric_md); |
| 283 | } |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 284 | |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 285 | // FARs |
| 286 | // Load FAR info |
| 287 | fars.apply(); |
| 288 | |
| 289 | // Nothing to be done immediately for forwarding or encapsulation. |
| 290 | // Forwarding is done by other parts of fabric.p4, and |
| 291 | // encapsulation is done in the egress |
| 292 | |
| 293 | // Needed for correct GTPU encapsulation in egress |
| 294 | fabric_md.spgw.ipv4_len = hdr.ipv4.total_len; |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 295 | } |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 296 | } |
| 297 | } |
| 298 | |
| 299 | |
| 300 | //====================================// |
| 301 | //============== Egress ==============// |
| 302 | //====================================// |
| 303 | control SpgwEgress( |
| 304 | inout parsed_headers_t hdr, |
| 305 | inout fabric_metadata_t fabric_md) { |
| 306 | |
| 307 | counter(MAX_PDR_COUNTERS, CounterType.packets_and_bytes) pdr_counter; |
| 308 | |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 309 | @hidden |
| 310 | action gtpu_encap() { |
| 311 | hdr.gtpu_ipv4.setValid(); |
| 312 | hdr.gtpu_ipv4.version = IP_VERSION_4; |
| 313 | hdr.gtpu_ipv4.ihl = IPV4_MIN_IHL; |
| 314 | hdr.gtpu_ipv4.dscp = 0; |
| 315 | hdr.gtpu_ipv4.ecn = 0; |
| 316 | hdr.gtpu_ipv4.total_len = hdr.ipv4.total_len |
| 317 | + (IPV4_HDR_SIZE + UDP_HDR_SIZE + GTP_HDR_SIZE); |
| 318 | hdr.gtpu_ipv4.identification = 0x1513; /* From NGIC. TODO: Needs to be dynamic */ |
| 319 | hdr.gtpu_ipv4.flags = 0; |
| 320 | hdr.gtpu_ipv4.frag_offset = 0; |
| 321 | hdr.gtpu_ipv4.ttl = DEFAULT_IPV4_TTL; |
| 322 | hdr.gtpu_ipv4.protocol = PROTO_UDP; |
| 323 | hdr.gtpu_ipv4.src_addr = fabric_md.spgw.tunnel_src_addr; |
| 324 | hdr.gtpu_ipv4.dst_addr = fabric_md.spgw.tunnel_dst_addr; |
| 325 | hdr.gtpu_ipv4.hdr_checksum = 0; // Updated later |
| 326 | |
| 327 | hdr.gtpu_udp.setValid(); |
Carmelo Cascone | db34737 | 2021-05-26 19:30:30 +0200 | [diff] [blame] | 328 | hdr.gtpu_udp.sport = fabric_md.spgw.tunnel_src_port; |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 329 | hdr.gtpu_udp.dport = UDP_PORT_GTPU; |
| 330 | hdr.gtpu_udp.len = fabric_md.spgw.ipv4_len |
| 331 | + (UDP_HDR_SIZE + GTP_HDR_SIZE); |
| 332 | hdr.gtpu_udp.checksum = 0; // Updated later, if WITH_SPGW_UDP_CSUM_UPDATE |
| 333 | |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 334 | hdr.outer_gtpu.setValid(); |
Carmelo Cascone | ffa7fed | 2021-06-01 18:31:57 -0700 | [diff] [blame] | 335 | hdr.outer_gtpu.version = GTP_V1; |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 336 | hdr.outer_gtpu.pt = GTP_PROTOCOL_TYPE_GTP; |
| 337 | hdr.outer_gtpu.spare = 0; |
| 338 | hdr.outer_gtpu.ex_flag = 0; |
| 339 | hdr.outer_gtpu.seq_flag = 0; |
| 340 | hdr.outer_gtpu.npdu_flag = 0; |
| 341 | hdr.outer_gtpu.msgtype = GTP_GPDU; |
| 342 | hdr.outer_gtpu.msglen = fabric_md.spgw.ipv4_len; |
| 343 | hdr.outer_gtpu.teid = fabric_md.spgw.teid; |
| 344 | } |
| 345 | |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 346 | @hidden |
| 347 | action gtpu_encap_qfi() { |
| 348 | gtpu_encap(); |
| 349 | hdr.gtpu_ipv4.total_len = hdr.ipv4.total_len |
| 350 | + IPV4_HDR_SIZE + UDP_HDR_SIZE + GTP_HDR_SIZE |
| 351 | + GTPU_OPTIONS_HDR_BYTES + GTPU_EXT_PSC_HDR_BYTES; |
| 352 | hdr.gtpu_udp.len = fabric_md.spgw.ipv4_len |
| 353 | + UDP_HDR_SIZE + GTP_HDR_SIZE |
| 354 | + GTPU_OPTIONS_HDR_BYTES + GTPU_EXT_PSC_HDR_BYTES; |
| 355 | hdr.outer_gtpu.msglen = fabric_md.spgw.ipv4_len |
| 356 | + GTPU_OPTIONS_HDR_BYTES + GTPU_EXT_PSC_HDR_BYTES; |
| 357 | hdr.outer_gtpu.ex_flag = 1; |
| 358 | hdr.outer_gtpu_options.setValid(); |
| 359 | hdr.outer_gtpu_options.next_ext = GTPU_NEXT_EXT_PSC; |
| 360 | hdr.outer_gtpu_ext_psc.setValid(); |
| 361 | hdr.outer_gtpu_ext_psc.type = GTPU_EXT_PSC_TYPE_DL; |
| 362 | hdr.outer_gtpu_ext_psc.len = GTPU_EXT_PSC_LEN; |
| 363 | hdr.outer_gtpu_ext_psc.qfi = fabric_md.spgw.qfi; |
| 364 | hdr.outer_gtpu_ext_psc.next_ext = GTPU_NEXT_EXT_NONE; |
| 365 | } |
| 366 | |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 367 | apply { |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 368 | if (fabric_md.spgw.skip_spgw == _FALSE) { |
| 369 | if (fabric_md.spgw.needs_gtpu_encap == _TRUE) { |
Daniele Moro | 411f6f7 | 2021-07-28 18:53:34 +0200 | [diff] [blame^] | 370 | if (fabric_md.spgw.needs_qfi_push == _TRUE) { |
| 371 | gtpu_encap_qfi(); |
| 372 | } else { |
| 373 | gtpu_encap(); |
| 374 | } |
Carmelo Cascone | b1f5cfd | 2020-12-04 16:54:24 -0800 | [diff] [blame] | 375 | } |
| 376 | if (fabric_md.spgw.skip_egress_pdr_ctr == _FALSE) { |
| 377 | pdr_counter.count(fabric_md.spgw.ctr_id); |
| 378 | } |
Robert MacDavid | de12b98 | 2020-07-15 18:38:59 -0700 | [diff] [blame] | 379 | } |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | |
| 384 | control update_gtpu_checksum( |
| 385 | inout ipv4_t gtpu_ipv4, |
| 386 | inout udp_t gtpu_udp, |
| 387 | in gtpu_t gtpu, |
| 388 | in ipv4_t ipv4, |
| 389 | in udp_t udp |
| 390 | ) { |
| 391 | apply { |
| 392 | // Compute outer IPv4 checksum. |
| 393 | update_checksum(gtpu_ipv4.isValid(), |
| 394 | { |
| 395 | gtpu_ipv4.version, |
| 396 | gtpu_ipv4.ihl, |
| 397 | gtpu_ipv4.dscp, |
| 398 | gtpu_ipv4.ecn, |
| 399 | gtpu_ipv4.total_len, |
| 400 | gtpu_ipv4.identification, |
| 401 | gtpu_ipv4.flags, |
| 402 | gtpu_ipv4.frag_offset, |
| 403 | gtpu_ipv4.ttl, |
| 404 | gtpu_ipv4.protocol, |
| 405 | gtpu_ipv4.src_addr, |
| 406 | gtpu_ipv4.dst_addr |
| 407 | }, |
| 408 | gtpu_ipv4.hdr_checksum, |
| 409 | HashAlgorithm.csum16 |
| 410 | ); |
| 411 | |
| 412 | #ifdef WITH_SPGW_UDP_CSUM_UPDATE |
| 413 | // Compute outer UDP checksum. |
| 414 | update_checksum_with_payload(gtpu_udp.isValid(), |
| 415 | { |
| 416 | gtpu_ipv4.src_addr, |
| 417 | gtpu_ipv4.dst_addr, |
| 418 | 8w0, |
| 419 | gtpu_ipv4.protocol, |
| 420 | gtpu_udp.len, |
| 421 | gtpu_udp.sport, |
| 422 | gtpu_udp.dport, |
| 423 | gtpu_udp.len, |
| 424 | gtpu, |
| 425 | ipv4, |
| 426 | // FIXME: we are assuming only UDP for downlink packets |
| 427 | // How to conditionally switch between UDP/TCP/ICMP? |
| 428 | udp |
| 429 | }, |
| 430 | gtpu_udp.checksum, |
| 431 | HashAlgorithm.csum16 |
| 432 | ); |
| 433 | #endif // WITH_SPGW_UDP_CSUM_UPDATE |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | #endif |