VNFs/DPPD-PROX/handle_cgnat.c

   1 /*
   2 // Copyright (c) 2010-2017 Intel Corporation
   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 #include <rte_mbuf.h>
  18 #include <rte_hash.h>
  19 #include <rte_hash_crc.h>
  20 #include <rte_ether.h>
  21 #include <rte_ip.h>
  22 #include <rte_version.h>
  23 #include <rte_byteorder.h>
  24 #include <rte_lpm.h>
  25
  26 #include "prox_lua_types.h"
  27 #include "prox_lua.h"
  28 #include "prox_malloc.h"
  29 #include "prox_cksum.h"
  30 #include "prefetch.h"
  31 #include "etypes.h"
  32 #include "log.h"
  33 #include "quit.h"
  34 #include "task_init.h"
  35 #include "task_base.h"
  36 #include "lconf.h"
  37 #include "log.h"
  38 #include "prox_port_cfg.h"
  39 #include "hash_entry_types.h"
  40 #include "prox_shared.h"
  41 #include "handle_cgnat.h"
  42
  43 #define ALL_32_BITS 0xffffffff
  44 #define BIT_16_TO_31 0xffff0000
  45 #define BIT_8_TO_15 0x0000ff00
  46 #define BIT_0_TO_15 0x0000ffff
  47
  48 struct private_key {
  49                 uint32_t ip_addr;
  50                 uint16_t l4_port;
  51 } __attribute__((packed));
  52
  53 struct private_flow_entry {
  54         uint64_t flow_time;
  55         uint32_t ip_addr;
  56         uint32_t private_ip_idx;
  57         uint16_t l4_port;
  58 };
  59
  60 struct public_key {
  61         uint32_t ip_addr;
  62         uint16_t l4_port;
  63 } __attribute__((packed));
  64
  65 struct public_entry {
  66         uint32_t ip_addr;
  67         uint16_t l4_port;
  68         uint32_t private_ip_idx;
  69         uint8_t dpdk_port;
  70 };
  71
  72 struct public_ip_config_info {
  73         uint32_t public_ip;
  74         uint32_t max_port_count;
  75         uint32_t port_free_count;
  76         uint16_t *port_list;
  77 };
  78
  79 struct private_ip_info {
  80         uint64_t mac_aging_time;
  81         uint32_t public_ip;
  82         uint32_t public_ip_idx;
  83         struct rte_ether *private_mac;
  84         uint8_t static_entry;
  85 };
  86
  87 struct task_nat {
  88         struct task_base base;
  89         struct rte_hash  *private_ip_hash;
  90         struct rte_hash  *private_ip_port_hash;
  91         struct rte_hash  *public_ip_port_hash;
  92         struct private_flow_entry *private_flow_entries;
  93         struct public_entry *public_entries;
  94         struct next_hop *next_hops;
  95         struct lcore_cfg *lconf;
  96         struct rte_lpm *ipv4_lpm;
  97         uint32_t total_free_port_count;
  98         uint32_t number_free_rules;
  99         int    private;
 100         uint32_t public_ip_count;
 101         uint32_t last_ip;
 102         struct public_ip_config_info *public_ip_config_info;
 103         struct private_ip_info *private_ip_info;
 104         uint8_t runtime_flags;
 105         int offload_crc;
 106         uint64_t src_mac[PROX_MAX_PORTS];
 107         uint64_t src_mac_from_dpdk_port[PROX_MAX_PORTS];
 108         volatile int dump_public_hash;
 109         volatile int dump_private_hash;
 110 };
 111 static __m128i proto_ipsrc_portsrc_mask;
 112 static __m128i proto_ipdst_portdst_mask;
 113 struct pkt_eth_ipv4 {
 114         struct ether_hdr ether_hdr;
 115         struct ipv4_hdr  ipv4_hdr;
 116         struct udp_hdr  udp_hdr;
 117 } __attribute__((packed));
 118
 119 void task_cgnat_dump_public_hash(struct task_nat *task)
 120 {
 121         task->dump_public_hash = 1;
 122 }
 123
 124 void task_cgnat_dump_private_hash(struct task_nat *task)
 125 {
 126         task->dump_private_hash = 1;
 127 }
 128
 129 static void set_l2(struct task_nat *task, struct rte_mbuf *mbuf, uint8_t nh_idx)
 130 {
 131         struct ether_hdr *peth = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
 132         *((uint64_t *)(&peth->d_addr)) = task->next_hops[nh_idx].mac_port_8bytes;
 133         *((uint64_t *)(&peth->s_addr)) = task->src_mac[task->next_hops[nh_idx].mac_port.out_idx];
 134 }
 135
 136 static uint8_t route_ipv4(struct task_nat *task, struct rte_mbuf *mbuf)
 137 {
 138         struct pkt_eth_ipv4 *pkt = rte_pktmbuf_mtod(mbuf, struct pkt_eth_ipv4 *);
 139         struct ipv4_hdr *ip = &pkt->ipv4_hdr;
 140         struct ether_hdr *peth_out;
 141         uint8_t tx_port;
 142         uint32_t dst_ip;
 143
 144         switch(ip->next_proto_id) {
 145         case IPPROTO_TCP:
 146         case IPPROTO_UDP:
 147                 dst_ip = ip->dst_addr;
 148                 break;
 149         default:
 150                 /* Routing for other protocols is not implemented */
 151                 plogx_info("Routing nit implemented for this protocol\n");
 152                 return OUT_DISCARD;
 153         }
 154
 155 #if RTE_VERSION >= RTE_VERSION_NUM(16,4,0,1)
 156         uint32_t next_hop_index;
 157 #else
 158         uint8_t next_hop_index;
 159 #endif
 160         if (unlikely(rte_lpm_lookup(task->ipv4_lpm, rte_bswap32(dst_ip), &next_hop_index) != 0)) {
 161                 uint8_t* dst_ipp = (uint8_t*)&dst_ip;
 162                 plog_warn("lpm_lookup failed for ip %d.%d.%d.%d: rc = %d\n",
 163                         dst_ipp[0], dst_ipp[1], dst_ipp[2], dst_ipp[3], -ENOENT);
 164                 return OUT_DISCARD;
 165         }
 166
 167         tx_port = task->next_hops[next_hop_index].mac_port.out_idx;
 168         set_l2(task, mbuf, next_hop_index);
 169         return tx_port;
 170 }
 171
 172 static int release_ip(struct task_nat *task, uint32_t *ip_addr, int public_ip_idx)
 173 {
 174         return 0;
 175 }
 176
 177 static int release_port(struct task_nat *task, uint32_t public_ip_idx, uint16_t udp_src_port)
 178 {
 179         struct public_ip_config_info *public_ip_config_info = &task->public_ip_config_info[public_ip_idx];
 180         if (public_ip_config_info->max_port_count > public_ip_config_info->port_free_count) {
 181                 public_ip_config_info->port_list[public_ip_config_info->port_free_count] = udp_src_port;
 182                 public_ip_config_info->port_free_count++;
 183                 task->total_free_port_count ++;
 184                 plogx_dbg("Now %d free ports for IP %d.%d.%d.%d\n", public_ip_config_info->port_free_count, IP4(public_ip_config_info->public_ip));
 185         } else {
 186                 plogx_err("Unable to release port for ip index %d: max_port_count = %d, port_free_count = %d", public_ip_idx, public_ip_config_info->max_port_count, public_ip_config_info->port_free_count);
 187                 return -1;
 188         }
 189         return 0;
 190 }
 191
 192 static int get_new_ip(struct task_nat *task, uint32_t *ip_addr)
 193 {
 194         struct public_ip_config_info *ip_info;
 195         if (++task->last_ip >= task->public_ip_count)
 196                 task->last_ip = 0;
 197         for (uint32_t ip_idx = task->last_ip; ip_idx < task->public_ip_count; ip_idx++) {
 198                 ip_info = &task->public_ip_config_info[ip_idx];
 199                 plogx_dbg("Checking public IP index %d\n", ip_idx);
 200                 if ((ip_info->port_free_count) > 0) {
 201                         plogx_dbg("Public IP index %d (IP %d.%d.%d.%d) has %d free ports\n", ip_idx, IP4(ip_info->public_ip), ip_info->port_free_count);
 202                         *ip_addr = ip_info->public_ip;
 203                         task->last_ip = ip_idx;
 204                         return ip_idx;
 205                 }
 206         }
 207         for (uint32_t ip_idx = 0; ip_idx < task->last_ip; ip_idx++) {
 208                 ip_info = &task->public_ip_config_info[ip_idx];
 209                 if ((ip_info->port_free_count) > 0) {
 210                         plogx_dbg("Public IP index %d (IP %d.%d.%d.%d) has %d free ports\n", ip_idx, IP4(ip_info->public_ip), ip_info->port_free_count);
 211                         *ip_addr = ip_info->public_ip;
 212                         task->last_ip = ip_idx;
 213                         return ip_idx;
 214                 }
 215         }
 216         return -1;
 217 }
 218
 219 static int get_new_port(struct task_nat *task, uint32_t ip_idx, uint16_t *udp_src_port)
 220 {
 221         int ret;
 222         struct public_ip_config_info *public_ip_config_info = &task->public_ip_config_info[ip_idx];
 223         if (public_ip_config_info->port_free_count > 0) {
 224                 public_ip_config_info->port_free_count--;
 225                 *udp_src_port = public_ip_config_info->port_list[public_ip_config_info->port_free_count];
 226                 task->total_free_port_count --;
 227                 plogx_info("Now %d free ports for IP %d.%d.%d.%d\n", public_ip_config_info->port_free_count, IP4(public_ip_config_info->public_ip));
 228         } else
 229                 return -1;
 230         return 0;
 231 }
 232
 233 static int delete_port_entry(struct task_nat *task, uint8_t proto, uint32_t private_ip, uint16_t private_port,  uint32_t public_ip, uint16_t public_port, int public_ip_idx)
 234 {
 235         int ret;
 236         struct private_key private_key;
 237         struct public_key public_key;
 238 //      private_key.proto = proto;
 239         private_key.ip_addr = private_ip;
 240         private_key.l4_port = private_port;
 241         ret = rte_hash_del_key(task->private_ip_port_hash, (const void *)&private_key);
 242         if (ret < 0) {
 243                 plogx_info("Unable delete key ip %d.%d.%d.%d / port %x in private ip_port hash\n", IP4(private_ip), private_port);
 244                 return -1;
 245         } else {
 246                 plogx_dbg("Deleted ip %d.%d.%d.%d / port %x from private ip_port hash\n", IP4(private_ip), private_port);
 247         }
 248         public_key.ip_addr = public_ip;
 249         public_key.l4_port = public_port;
 250         ret = rte_hash_del_key(task->public_ip_port_hash, (const void *)&public_key);
 251         if (ret < 0) {
 252                 plogx_info("Unable delete key ip %d.%d.%d.%d / port %x in public ip_port hash\n", IP4(public_ip), public_port);
 253                 return -1;
 254         } else {
 255                 plogx_dbg("Deleted ip %d.%d.%d.%d / port %x (hash index %d) from public ip_port hash\n", IP4(public_ip), public_port, ret);
 256                 release_port(task, public_ip_idx, public_port);
 257         }
 258         return 0;
 259 }
 260
 261 static int add_new_port_entry(struct task_nat *task, uint8_t proto, int public_ip_idx, int private_ip_idx, uint32_t private_src_ip, uint16_t private_udp_port, struct rte_mbuf *mbuf, uint64_t tsc, uint16_t *port)
 262 {
 263         struct private_key private_key;
 264         struct public_key public_key;
 265         uint32_t ip = task->public_ip_config_info[public_ip_idx].public_ip;
 266         int ret;
 267         if (get_new_port(task, public_ip_idx, port) < 0) {
 268                 plogx_info("Unable to find new port for IP %x\n", private_src_ip);
 269                 return -1;
 270         }
 271 //      private_key.proto = proto;
 272         private_key.ip_addr = private_src_ip;
 273         private_key.l4_port = private_udp_port;
 274         ret = rte_hash_add_key(task->private_ip_port_hash, (const void *)&private_key);
 275         if (ret < 0) {
 276                 plogx_info("Unable add ip %d.%d.%d.%d / port %x in private ip_port hash\n", IP4(private_src_ip), private_udp_port);
 277                 release_port(task, public_ip_idx, *port);
 278                 return -1;
 279         } else if (task->private_flow_entries[ret].ip_addr) {
 280                 plogx_dbg("Race condition properly handled: port alrerady added\n");
 281                 release_port(task, public_ip_idx, *port);
 282                 return ret;
 283         } else {
 284                 plogx_dbg("Added ip %d.%d.%d.%d / port %x in private ip_port hash => %d.%d.%d.%d / %d - index = %d\n", IP4(private_src_ip), private_udp_port, IP4(ip), *port, ret);
 285         }
 286         task->private_flow_entries[ret].ip_addr = ip;
 287         task->private_flow_entries[ret].l4_port = *port;
 288         task->private_flow_entries[ret].flow_time = tsc;
 289         task->private_flow_entries[ret].private_ip_idx = private_ip_idx;
 290
 291         public_key.ip_addr = ip;
 292         public_key.l4_port = *port;
 293         plogx_dbg("Adding key ip %d.%d.%d.%d / port %x in public ip_port hash\n", IP4(ip), *port);
 294         ret = rte_hash_add_key(task->public_ip_port_hash, (const void *)&public_key);
 295         if (ret < 0) {
 296                 plogx_info("Unable add ip %x / port %x in public ip_port hash\n", ip, *port);
 297                 // TODO: remove from private_ip_port_hash
 298                 release_port(task, public_ip_idx, *port);
 299                 return -1;
 300         } else {
 301                 plogx_dbg("Added ip %d.%d.%d.%d / port %x in public ip_port hash\n", IP4(ip), *port);
 302         }
 303         task->public_entries[ret].ip_addr = private_src_ip;
 304         task->public_entries[ret].l4_port = private_udp_port;
 305         task->public_entries[ret].dpdk_port = mbuf->port;
 306         task->public_entries[ret].private_ip_idx = private_ip_idx;
 307         return ret;
 308 }
 309
 310 static int handle_nat_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
 311 {
 312         struct task_nat *task = (struct task_nat *)tbase;
 313         uint8_t out[MAX_PKT_BURST];
 314         uint16_t j;
 315         uint32_t *ip_addr, public_ip, private_ip;
 316         uint16_t *udp_src_port, port, private_port, public_port;
 317         struct pkt_eth_ipv4 *pkt[MAX_PKT_BURST];
 318         int ret, private_ip_idx, public_ip_idx = -1, port_idx;
 319         int new_entry = 0;
 320         uint8_t proto;
 321         uint64_t tsc = rte_rdtsc();
 322         void *keys[MAX_PKT_BURST];
 323         int32_t positions[MAX_PKT_BURST];
 324         int map[MAX_PKT_BURST] = {0};
 325
 326         if (unlikely(task->dump_public_hash)) {
 327                 const struct public_key *next_key;
 328                 void *next_data;
 329                 uint32_t iter = 0;
 330                 int i = 0;
 331                 int ret;
 332
 333                 while ((ret = rte_hash_iterate(task->public_ip_port_hash, (const void **)&next_key, &next_data, &iter)) >= 0) {
 334                         plogx_info("Public entry %d (index %d): ip = %d.%d.%d.%d, port = %d ===> private entry: ip = %d.%d.%d.%d, port = %d\n", i++, ret, IP4(next_key->ip_addr), next_key->l4_port, IP4(task->public_entries[ret].ip_addr),task->public_entries[ret].l4_port);
 335                 }
 336                 task->dump_public_hash = 0;
 337         }
 338         if (unlikely(task->dump_private_hash)) {
 339                 const struct private_key *next_key;
 340                 void *next_data;
 341                 uint32_t iter = 0;
 342                 int i = 0;
 343                 int ret;
 344
 345                 while ((ret = rte_hash_iterate(task->private_ip_port_hash, (const void **)&next_key, &next_data, &iter)) >= 0) {
 346                         plogx_info("Private entry %d (index %d): ip = %d.%d.%d.%d, port = %d ===> public entry: ip = %d.%d.%d.%d, port = %d\n", i++, ret, IP4(next_key->ip_addr), next_key->l4_port, IP4(task->private_flow_entries[ret].ip_addr),task->private_flow_entries[ret].l4_port);
 347                 }
 348                 task->dump_private_hash = 0;
 349         }
 350
 351         for (j = 0; j < n_pkts; ++j) {
 352                 PREFETCH0(mbufs[j]);
 353         }
 354         for (j = 0; j < n_pkts; ++j) {
 355                 pkt[j] = rte_pktmbuf_mtod(mbufs[j], struct pkt_eth_ipv4 *);
 356                 PREFETCH0(pkt[j]);
 357         }
 358         if (task->private) {
 359                 struct private_key key[MAX_PKT_BURST];
 360                 for (j = 0; j < n_pkts; ++j) {
 361                         /* Currently, only support eth/ipv4 packets */
 362                         if (pkt[j]->ether_hdr.ether_type != ETYPE_IPv4) {
 363                                 plogx_info("Currently, only support eth/ipv4 packets\n");
 364                                 out[j] = OUT_DISCARD;
 365                                 keys[j] = (void *)NULL;
 366                                 continue;
 367                         }
 368                         key[j].ip_addr = pkt[j]->ipv4_hdr.src_addr;
 369                         key[j].l4_port = pkt[j]->udp_hdr.src_port;
 370                         keys[j] = &key[j];
 371                 }
 372                 ret = rte_hash_lookup_bulk(task->private_ip_port_hash, (const void **)&keys, n_pkts, positions);
 373                 if (unlikely(ret < 0)) {
 374                         plogx_info("lookup_bulk failed in private_ip_port_hash\n");
 375                         return -1;
 376                 }
 377                 int n_new_mapping = 0;
 378                 for (j = 0; j < n_pkts; ++j) {
 379                         port_idx = positions[j];
 380                         if (unlikely(port_idx < 0)) {
 381                                 plogx_dbg("ip %d.%d.%d.%d / port %x not found in private ip/port hash\n", IP4(pkt[j]->ipv4_hdr.src_addr), pkt[j]->udp_hdr.src_port);
 382                                 map[n_new_mapping] = j;
 383                                 keys[n_new_mapping++] = (void *)&(pkt[j]->ipv4_hdr.src_addr);
 384                         } else {
 385                                 ip_addr = &(pkt[j]->ipv4_hdr.src_addr);
 386                                 udp_src_port = &(pkt[j]->udp_hdr.src_port);
 387                                 plogx_dbg("ip/port %d.%d.%d.%d / %x found in private ip/port hash\n", IP4(pkt[j]->ipv4_hdr.src_addr), pkt[j]->udp_hdr.src_port);
 388                                 *ip_addr = task->private_flow_entries[port_idx].ip_addr;
 389                                 *udp_src_port = task->private_flow_entries[port_idx].l4_port;
 390                                 uint64_t flow_time = task->private_flow_entries[port_idx].flow_time;
 391                                 if (flow_time + tsc_hz < tsc) {
 392                                         task->private_flow_entries[port_idx].flow_time = tsc;
 393                                 }
 394                                 private_ip_idx = task->private_flow_entries[port_idx].private_ip_idx;
 395                                 if (task->private_ip_info[private_ip_idx].mac_aging_time + tsc_hz < tsc)
 396                                         task->private_ip_info[private_ip_idx].mac_aging_time = tsc;
 397                                 prox_ip_udp_cksum(mbufs[j], &pkt[j]->ipv4_hdr, sizeof(struct ether_hdr), sizeof(struct ipv4_hdr), task->offload_crc);
 398                                 out[j] =  route_ipv4(task, mbufs[j]);
 399                         }
 400                 }
 401
 402                 if (n_new_mapping) {
 403                         // Find whether at least IP is already known...
 404                         ret = rte_hash_lookup_bulk(task->private_ip_hash, (const void **)&keys, n_new_mapping, positions);
 405                         if (unlikely(ret < 0)) {
 406                                 plogx_info("lookup_bulk failed for private_ip_hash\n");
 407                                 for (int k = 0; k < n_new_mapping; ++k) {
 408                                         j = map[k];
 409                                         out[j] = OUT_DISCARD;
 410                                 }
 411                                 n_new_mapping = 0;
 412                         }
 413                         for (int k = 0; k < n_new_mapping; ++k) {
 414                                 private_ip_idx = positions[k];
 415                                 j = map[k];
 416                                 ip_addr = &(pkt[j]->ipv4_hdr.src_addr);
 417                                 proto = pkt[j]->ipv4_hdr.next_proto_id;
 418                                 udp_src_port = &(pkt[j]->udp_hdr.src_port);
 419                                 int new_ip_entry = 0;
 420
 421                                 if (unlikely(private_ip_idx < 0)) {
 422                                         private_ip = *ip_addr;
 423                                         private_port = *udp_src_port;
 424                                         plogx_dbg("Did not find private ip %d.%d.%d.%d in ip hash table, looking for new public ip\n", IP4(*ip_addr));
 425                                         // IP not found, need to get a new IP/port mapping
 426                                         public_ip_idx = get_new_ip(task, &public_ip);
 427                                         if (public_ip_idx < 0) {
 428                                                 plogx_info("Unable to find new ip/port\n");
 429                                                 out[j] = OUT_DISCARD;
 430                                                 continue;
 431                                         } else {
 432                                                 plogx_dbg("found new public ip %d.%d.%d.%d at public IP index %d\n", IP4(public_ip), public_ip_idx);
 433                                         }
 434                                         private_ip_idx = rte_hash_add_key(task->private_ip_hash, (const void *)ip_addr);
 435                                         // The key might be added multiple time - in case the same key was present in the bulk_lookup multiple times
 436                                         // As such this is not an issue - the add_key will returns the index as for a new key
 437                                         // This scenario should not happen often in real time use case
 438                                         // as a for a new flow (flow renewal), probably only one packet will be sent (e.g. TCP SYN)
 439                                         if (private_ip_idx < 0) {
 440                                                 release_ip(task, &public_ip, public_ip_idx);
 441                                                 plogx_info("Unable add ip %d.%d.%d.%d in private ip hash\n", IP4(*ip_addr));
 442                                                 out[j] = OUT_DISCARD;
 443                                                 continue;
 444                                         } else if (task->private_ip_info[private_ip_idx].public_ip) {
 445                                                 plogx_info("race condition properly handled : ip %d.%d.%d.%d already in private ip hash\n", IP4(*ip_addr));
 446                                                 release_ip(task, &public_ip, public_ip_idx);
 447                                                 public_ip = task->private_ip_info[private_ip_idx].public_ip;
 448                                                 public_ip_idx = task->private_ip_info[private_ip_idx].public_ip_idx;
 449                                         } else {
 450                                                 plogx_dbg("Added ip %d.%d.%d.%d in private ip hash\n", IP4(*ip_addr));
 451                                                 rte_memcpy(&task->private_ip_info[private_ip_idx].private_mac, ((uint8_t *)pkt) + 6, 6);
 452                                                 task->private_ip_info[private_ip_idx].public_ip = public_ip;
 453                                                 task->private_ip_info[private_ip_idx].static_entry = 0;
 454                                                 task->private_ip_info[private_ip_idx].public_ip_idx = public_ip_idx;
 455                                                 new_ip_entry = 1;
 456                                         }
 457                                 } else {
 458                                         public_ip = task->private_ip_info[private_ip_idx].public_ip;
 459                                         public_ip_idx = task->private_ip_info[private_ip_idx].public_ip_idx;
 460                                 }
 461                                 port_idx = add_new_port_entry(task, proto, public_ip_idx, private_ip_idx, *ip_addr, *udp_src_port, mbufs[j], tsc, &public_port);
 462                                 if (port_idx < 0) {
 463                                         // TODO: delete IP in ip_hash
 464                                         if ((new_ip_entry) && (task->last_ip != 0)) {
 465                                                 release_ip(task, &public_ip, public_ip_idx);
 466                                                 task->last_ip--;
 467                                         } else if (new_ip_entry) {
 468                                                 release_ip(task, &public_ip, public_ip_idx);
 469                                                 task->last_ip = task->public_ip_count-1;
 470                                         }
 471                                         plogx_info("Failed to add new port entry\n");
 472                                         out[j] = OUT_DISCARD;
 473                                         continue;
 474                                 } else {
 475                                         private_ip = *ip_addr;
 476                                         private_port = *udp_src_port;
 477                                         plogx_info("Added new ip/port: private ip/port = %d.%d.%d.%d/%x public ip/port = %d.%d.%d.%d/%x, index = %d\n", IP4(private_ip), private_port, IP4(public_ip), public_port, port_idx);
 478                                 }
 479                                 // task->private_flow_entries[port_idx].ip_addr = task->private_ip_info[private_ip_idx].public_ip;
 480                                 plogx_info("Added new port: private ip/port = %d.%d.%d.%d/%x, public ip/port = %d.%d.%d.%d/%x\n", IP4(private_ip), private_port, IP4(task->private_ip_info[private_ip_idx].public_ip), public_port);
 481                                 *ip_addr = public_ip ;
 482                                 *udp_src_port = public_port;
 483                                 uint64_t flow_time = task->private_flow_entries[port_idx].flow_time;
 484                                 if (flow_time + tsc_hz < tsc) {
 485                                         task->private_flow_entries[port_idx].flow_time = tsc;
 486                                 }
 487                                 if (task->private_ip_info[private_ip_idx].mac_aging_time + tsc_hz < tsc)
 488                                         task->private_ip_info[private_ip_idx].mac_aging_time = tsc;
 489                                 prox_ip_udp_cksum(mbufs[j], &pkt[j]->ipv4_hdr, sizeof(struct ether_hdr), sizeof(struct ipv4_hdr), task->offload_crc);
 490                                 // TODO: if route fails while just added new key in table, should we delete the key from the table?
 491                                 out[j] =  route_ipv4(task, mbufs[j]);
 492                                 if (out[j] && new_entry) {
 493                                         delete_port_entry(task, proto, private_ip, private_port, *ip_addr, *udp_src_port, public_ip_idx);
 494                                         plogx_info("Deleted port: private ip/port = %d.%d.%d.%d/%x, public ip/port = %d.%d.%d.%d/%x\n", IP4(private_ip), private_port, IP4(*ip_addr), *udp_src_port);
 495                                 }
 496                         }
 497                 }
 498                 return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
 499         } else {
 500                 struct public_key public_key[MAX_PKT_BURST];
 501                 for (j = 0; j < n_pkts; ++j) {
 502                         /* Currently, only support eth/ipv4 packets */
 503                         if (pkt[j]->ether_hdr.ether_type != ETYPE_IPv4) {
 504                                 plogx_info("Currently, only support eth/ipv4 packets\n");
 505                                 out[j] = OUT_DISCARD;
 506                                 keys[j] = (void *)NULL;
 507                                 continue;
 508                         }
 509                         public_key[j].ip_addr = pkt[j]->ipv4_hdr.dst_addr;
 510                         public_key[j].l4_port = pkt[j]->udp_hdr.dst_port;
 511                         keys[j] = &public_key[j];
 512                 }
 513                 ret = rte_hash_lookup_bulk(task->public_ip_port_hash, (const void **)&keys, n_pkts, positions);
 514                 if (ret < 0) {
 515                         plogx_err("Failed lookup bulk public_ip_port_hash\n");
 516                         return -1;
 517                 }
 518                 for (j = 0; j < n_pkts; ++j) {
 519                         port_idx = positions[j];
 520                         ip_addr = &(pkt[j]->ipv4_hdr.dst_addr);
 521                         udp_src_port = &(pkt[j]->udp_hdr.dst_port);
 522                         if (port_idx < 0) {
 523                                 plogx_err("Failed to find ip/port %d.%d.%d.%d/%x in public_ip_port_hash\n", IP4(*ip_addr), *udp_src_port);
 524                                 out[j] = OUT_DISCARD;
 525                         } else {
 526                                 plogx_dbg("Found ip/port %d.%d.%d.%d/%x in public_ip_port_hash\n", IP4(*ip_addr), *udp_src_port);
 527                                 *ip_addr = task->public_entries[port_idx].ip_addr;
 528                                 *udp_src_port = task->public_entries[port_idx].l4_port;
 529                                 private_ip_idx = task->public_entries[port_idx].private_ip_idx;
 530                                 plogx_dbg("Found private IP info for ip %d.%d.%d.%d\n", IP4(*ip_addr));
 531                                 rte_memcpy(((uint8_t *)(pkt[j])) + 0, &task->private_ip_info[private_ip_idx].private_mac, 6);
 532                                 rte_memcpy(((uint8_t *)(pkt[j])) + 6, &task->src_mac_from_dpdk_port[task->public_entries[port_idx].dpdk_port], 6);
 533                                 out[j] = task->public_entries[port_idx].dpdk_port;
 534                         }
 535                         prox_ip_udp_cksum(mbufs[j], &pkt[j]->ipv4_hdr, sizeof(struct ether_hdr), sizeof(struct ipv4_hdr), task->offload_crc);
 536                 }
 537                 return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
 538         }
 539
 540 }
 541
 542 static int lua_to_hash_nat(struct task_args *targ, struct lua_State *L, enum lua_place from, const char *name, uint8_t socket)
 543 {
 544         struct rte_hash *tmp_priv_ip_hash, *tmp_priv_hash, *tmp_pub_hash;
 545         struct private_flow_entry *tmp_priv_flow_entries;
 546         struct public_entry *tmp_pub_entries;
 547         uint32_t n_entries = 0;;
 548         uint32_t ip_from, ip_to;
 549         uint16_t port_from, port_to;
 550         int ret, idx, pop, pop2, pop3, n_static_entries = 0;
 551         uint32_t dst_ip1, dst_ip2;
 552         struct val_range dst_port;
 553         struct public_ip_config_info *ip_info;
 554         struct public_ip_config_info *tmp_public_ip_config_info;
 555
 556         if ((pop = lua_getfrom(L, from, name)) < 0)
 557                 return -1;
 558
 559         if (!lua_istable(L, -1)) {
 560                 plogx_err("Can't read cgnat since data is not a table\n");
 561                 return -1;
 562         }
 563
 564         struct tmp_public_ip {
 565                 uint32_t ip_beg;
 566                 uint32_t ip_end;
 567                 uint16_t port_beg;
 568                 uint16_t port_end;
 569         };
 570         struct tmp_static_ip {
 571                 uint32_t private_ip;
 572                 uint32_t public_ip;
 573         };
 574         struct tmp_static_ip_port {
 575                 uint32_t private_ip;
 576                 uint32_t public_ip;
 577                 uint32_t n_ports;
 578                 uint16_t private_port;
 579                 uint16_t public_port;
 580                 int ip_found;
 581                 uint8_t port_found;
 582         };
 583         uint32_t n_public_groups = 0;
 584         uint32_t n_public_ip = 0;
 585         uint32_t n_static_ip = 0;
 586         uint32_t n_static_ip_port = 0;
 587         unsigned int i = 0;
 588         struct tmp_public_ip *tmp_public_ip = NULL;
 589         struct tmp_static_ip *tmp_static_ip = NULL;
 590         struct tmp_static_ip_port *tmp_static_ip_port = NULL;
 591
 592         // Look for Dynamic entries configuration
 593         plogx_info("Reading dynamic NAT table\n");
 594         if ((pop2 = lua_getfrom(L, TABLE, "dynamic")) < 0) {
 595                 plogx_info("No dynamic table found\n");
 596         } else {
 597                 uint64_t n_ip, n_port;
 598                 if (!lua_istable(L, -1)) {
 599                         plogx_err("Can't read cgnat since data is not a table\n");
 600                         return -1;
 601                 }
 602                 lua_len(L, -1);
 603                 n_public_groups = lua_tointeger(L, -1);
 604                 plogx_info("%d groups of public IP\n", n_public_groups);
 605                 tmp_public_ip = (struct tmp_public_ip *)malloc(n_public_groups * sizeof(struct tmp_public_ip));
 606                 PROX_PANIC(tmp_public_ip == NULL, "Failed to allocated tmp_public_ip\n");
 607                 lua_pop(L, 1);
 608                 lua_pushnil(L);
 609
 610                 while (lua_next(L, -2)) {
 611                         if (lua_to_ip(L, TABLE, "public_ip_range_start", &dst_ip1) ||
 612                                 lua_to_ip(L, TABLE, "public_ip_range_stop", &dst_ip2) ||
 613                                 lua_to_val_range(L, TABLE, "public_port", &dst_port))
 614                                         return -1;
 615                         PROX_PANIC(dst_ip2 < dst_ip1, "public_ip_range error: %d.%d.%d.%d < %d.%d.%d.%d\n", (dst_ip2 >> 24), (dst_ip2 >> 16) & 0xFF, (dst_ip2 >> 8) & 0xFF, dst_ip2 & 0xFF, dst_ip1 >> 24, (dst_ip1 >> 16) & 0xFF, (dst_ip1 >> 8) & 0xFF, dst_ip1 & 0xFF);
 616                         PROX_PANIC(dst_port.end < dst_port.beg, "public_port error: %d < %d\n", dst_port.end, dst_port.beg);
 617                         n_ip = dst_ip2 - dst_ip1 + 1;
 618                         n_port =  dst_port.end - dst_port.beg + 1;
 619                         n_public_ip += n_ip;
 620                         plogx_info("Found IP from %d.%d.%d.%d to %d.%d.%d.%d and port from %d to %d\n", dst_ip1 >> 24, (dst_ip1 >> 16) & 0xFF, (dst_ip1 >> 8) & 0xFF, dst_ip1 & 0xFF, (dst_ip2 >> 24), (dst_ip2 >> 16) & 0xFF, (dst_ip2 >> 8) & 0xFF, dst_ip2 & 0xFF, dst_port.beg, dst_port.end);
 621                         tmp_public_ip[i].ip_beg = dst_ip1;
 622                         tmp_public_ip[i].ip_end = dst_ip2;
 623                         tmp_public_ip[i].port_beg = dst_port.beg;
 624                         tmp_public_ip[i++].port_end = dst_port.end;
 625                         n_entries += n_ip * n_port;
 626                         lua_pop(L, 1);
 627                 }
 628                 lua_pop(L, pop2);
 629
 630         }
 631         i = 0;
 632         if ((pop2 = lua_getfrom(L, TABLE, "static_ip")) < 0) {
 633                 plogx_info("No static ip table found\n");
 634         } else {
 635                 if (!lua_istable(L, -1)) {
 636                         plogx_err("Can't read cgnat since data is not a table\n");
 637                         return -1;
 638                 }
 639
 640                 lua_len(L, -1);
 641                 n_static_ip = lua_tointeger(L, -1);
 642                 plogx_info("%d entries in static ip table\n", n_static_ip);
 643                 lua_pop(L, 1);
 644                 tmp_static_ip = (struct tmp_static_ip *)malloc(n_static_ip * sizeof(struct tmp_static_ip));
 645                 PROX_PANIC(tmp_static_ip == NULL, "Failed to allocated tmp_static_ip\n");
 646                 lua_pushnil(L);
 647                 while (lua_next(L, -2)) {
 648                         if (lua_to_ip(L, TABLE, "src_ip", &ip_from) ||
 649                                 lua_to_ip(L, TABLE, "dst_ip", &ip_to))
 650                                         return -1;
 651                         ip_from = rte_bswap32(ip_from);
 652                         ip_to = rte_bswap32(ip_to);
 653                         tmp_static_ip[i].private_ip = ip_from;
 654                         tmp_static_ip[i++].public_ip = ip_to;
 655                         for (unsigned int j = 0; j < n_public_groups; j++) {
 656                                 if ((tmp_public_ip[j].ip_beg <= ip_to) && (ip_to <= tmp_public_ip[j].ip_end)) {
 657                                         PROX_PANIC(1, "list of static ip mapping overlap with list of dynamic IP => not supported yet\n");
 658                                 }
 659                         }
 660                         n_public_ip++;
 661                         lua_pop(L, 1);
 662                 }
 663                 lua_pop(L, pop2);
 664         }
 665
 666         i = 0;
 667         if ((pop2 = lua_getfrom(L, TABLE, "static_ip_port")) < 0) {
 668                 plogx_info("No static table found\n");
 669         } else {
 670                 if (!lua_istable(L, -1)) {
 671                         plogx_err("Can't read cgnat since data is not a table\n");
 672                         return -1;
 673                 }
 674
 675                 lua_len(L, -1);
 676                 n_static_ip_port = lua_tointeger(L, -1);
 677                 plogx_info("%d entries in static table\n", n_static_ip_port);
 678                 lua_pop(L, 1);
 679                 tmp_static_ip_port = (struct tmp_static_ip_port *)malloc(n_static_ip_port * sizeof(struct tmp_static_ip_port));
 680                 PROX_PANIC(tmp_static_ip_port == NULL, "Failed to allocated tmp_static_ip_port\n");
 681                 lua_pushnil(L);
 682
 683                 while (lua_next(L, -2)) {
 684                         if (lua_to_ip(L, TABLE, "src_ip", &ip_from) ||
 685                                 lua_to_ip(L, TABLE, "dst_ip", &ip_to) ||
 686                                 lua_to_port(L, TABLE, "src_port", &port_from) ||
 687                                 lua_to_port(L, TABLE, "dst_port", &port_to))
 688                                         return -1;
 689
 690                         ip_from = rte_bswap32(ip_from);
 691                         ip_to = rte_bswap32(ip_to);
 692                         port_from = rte_bswap16(port_from);
 693                         port_to = rte_bswap16(port_to);
 694                         tmp_static_ip_port[i].private_ip = ip_from;
 695                         tmp_static_ip_port[i].public_ip = ip_to;
 696                         tmp_static_ip_port[i].private_port = port_from;
 697                         tmp_static_ip_port[i].public_port = port_to;
 698                         tmp_static_ip_port[i].n_ports = 1;
 699                         for (unsigned int j = 0; j < n_public_groups; j++) {
 700                                 if ((tmp_public_ip[j].ip_beg <= rte_bswap32(ip_to)) && (rte_bswap32(ip_to) <= tmp_public_ip[j].ip_end)) {
 701                                         tmp_static_ip_port[i].ip_found = j + 11;
 702                                         PROX_PANIC(1, "list of static ip/port mapping overlap with list of dynamic IP => not supported yet\n");
 703                                 }
 704                         }
 705                         for (unsigned int j = 0; j < n_static_ip; j++) {
 706                                 if ((tmp_static_ip[j].public_ip == ip_to) ) {
 707                                         tmp_static_ip_port[i].ip_found = j + 1;
 708                                         PROX_PANIC(1, "list of static ip/port mapping overlap with list of static ip => not supported yet\n");
 709                                 }
 710                         }
 711                         for (unsigned int j = 0; j <= i; j++) {
 712                                 if (ip_to == tmp_static_ip_port[j].public_ip) {
 713                                         tmp_static_ip_port[i].ip_found = j + 1;
 714                                         tmp_static_ip_port[j].n_ports++;
 715                                         tmp_static_ip_port[i].n_ports = 0;
 716                                 }
 717                         }
 718                         i++;
 719                         if (!tmp_static_ip_port[i].ip_found) {
 720                                 n_public_ip++;
 721                                 n_entries++;
 722                         }
 723                         lua_pop(L, 1);
 724                 }
 725                 lua_pop(L, pop2);
 726         }
 727         lua_pop(L, pop);
 728
 729         tmp_public_ip_config_info = (struct public_ip_config_info *)prox_zmalloc(n_public_ip * sizeof(struct public_ip_config_info), socket);
 730         PROX_PANIC(tmp_public_ip_config_info == NULL, "Failed to allocate PUBLIC IP INFO\n");
 731         plogx_info("%d PUBLIC IP INFO allocated\n", n_public_ip);
 732
 733         struct private_ip_info *tmp_priv_ip_info = (struct private_ip_info *)prox_zmalloc(4 * n_public_ip * sizeof(struct public_ip_config_info), socket);
 734         PROX_PANIC(tmp_priv_ip_info == NULL, "Failed to allocate PRIVATE IP INFO\n");
 735         plogx_info("%d PRIVATE IP INFO allocated\n", 4 * n_public_ip);
 736
 737         uint32_t ip_free_count = 0;
 738         for (i = 0; i < n_public_groups; i++) {
 739                 for (uint32_t ip = tmp_public_ip[i].ip_beg; ip <= tmp_public_ip[i].ip_end; ip++) {
 740                         ip_info = &tmp_public_ip_config_info[ip_free_count];
 741                         ip_info->public_ip = rte_bswap32(ip);
 742                         ip_info->port_list = (uint16_t *)prox_zmalloc((dst_port.end - dst_port.beg) * sizeof(uint16_t), socket);
 743                         PROX_PANIC(ip_info->port_list == NULL, "Failed to allocate list of ports for ip %x\n", ip);
 744                         for (uint32_t port = tmp_public_ip[i].port_beg; port <= tmp_public_ip[i].port_end; port++) {
 745                                 ip_info->port_list[ip_info->port_free_count] = rte_bswap16(port);
 746                                 ip_info->port_free_count++;
 747                         }
 748                         ip_info->max_port_count = ip_info->port_free_count;
 749                         plogx_dbg("Added IP %d.%d.%d.%d with ports from %x to %x at index %x\n", IP4(ip_info->public_ip), tmp_public_ip[i].port_beg, tmp_public_ip[i].port_end, ip_free_count);
 750                         ip_free_count++;
 751                 }
 752         }
 753         uint32_t public_ip_count = ip_free_count;
 754         for (i = 0; i < n_static_ip; i++) {
 755                 ip_info = &tmp_public_ip_config_info[ip_free_count];
 756                 ip_info->public_ip = tmp_static_ip[i].public_ip;
 757                 ip_info->port_list = NULL;
 758                 ip_info->max_port_count = 0;
 759                 ip_free_count++;
 760         }
 761         for (i = 0; i < n_static_ip_port; i++) {
 762                 if (!tmp_static_ip_port[i].ip_found) {
 763                         ip_info = &tmp_public_ip_config_info[ip_free_count];
 764                         ip_info->public_ip = tmp_static_ip_port[i].public_ip;
 765                         ip_info->port_list = (uint16_t *)prox_zmalloc(tmp_static_ip_port[i].n_ports * sizeof(uint16_t), socket);
 766                         PROX_PANIC(ip_info->port_list == NULL, "Failed to allocate list of ports for ip %x\n", tmp_static_ip_port[i].public_ip);
 767                         ip_info->port_list[ip_info->port_free_count] = tmp_static_ip_port[i].public_port;
 768                         ip_info->port_free_count++;
 769                         ip_info->max_port_count = ip_info->port_free_count;
 770                         ip_free_count++;
 771                 } else {
 772                         for (unsigned j = 0; j < ip_free_count; j++) {
 773                                 ip_info = &tmp_public_ip_config_info[j];
 774                                 if (ip_info->public_ip == tmp_static_ip_port[i].public_ip) {
 775                                         ip_info = &tmp_public_ip_config_info[j];
 776                                         ip_info->port_list[ip_info->port_free_count] = tmp_static_ip_port[i].public_port;
 777                                         ip_info->port_free_count++;
 778                                         ip_info->max_port_count = ip_info->port_free_count;
 779                                         break;
 780                                 }
 781                         }
 782                 }
 783         }
 784         plogx_info("%d entries in dynamic table\n", n_entries);
 785
 786         n_entries = n_entries * 4;
 787         static char hash_name[30];
 788         sprintf(hash_name, "A%03d_hash_nat_table", targ->lconf->id);
 789         struct rte_hash_parameters hash_params = {
 790                 .name = hash_name,
 791                 .entries = n_entries,
 792                 .key_len = sizeof(struct private_key),
 793                 .hash_func = rte_hash_crc,
 794                 .hash_func_init_val = 0,
 795         };
 796         plogx_info("hash table name = %s\n", hash_params.name);
 797         struct private_key private_key;
 798         struct public_key public_key;
 799         tmp_priv_hash = rte_hash_create(&hash_params);
 800         PROX_PANIC(tmp_priv_hash == NULL, "Failed to set up private hash table for NAT\n");
 801         plogx_info("private hash table allocated, with %d entries of size %d\n", hash_params.entries, hash_params.key_len);
 802
 803         tmp_priv_flow_entries = (struct private_flow_entry *)prox_zmalloc(n_entries * sizeof(struct private_flow_entry), socket);
 804         PROX_PANIC(tmp_priv_flow_entries == NULL, "Failed to allocate memory for private NAT %u entries\n", n_entries);
 805         plogx_info("private data allocated, with %d entries of size %ld\n", n_entries, sizeof(struct private_flow_entry));
 806
 807         hash_name[0]++;
 808         //hash_params.name[0]++;
 809         plogx_info("hash table name = %s\n", hash_params.name);
 810         hash_params.key_len = sizeof(uint32_t);
 811         hash_params.entries = 4 * ip_free_count;
 812         tmp_priv_ip_hash = rte_hash_create(&hash_params);
 813         PROX_PANIC(tmp_priv_ip_hash == NULL, "Failed to set up private ip hash table for NAT\n");
 814         plogx_info("private ip hash table allocated, with %d entries of size %d\n", hash_params.entries, hash_params.key_len);
 815
 816         hash_name[0]++;
 817         //hash_params.name[0]++;
 818         plogx_info("hash table name = %s\n", hash_params.name);
 819         hash_params.entries = n_entries;
 820         hash_params.key_len = sizeof(struct public_key),
 821         tmp_pub_hash = rte_hash_create(&hash_params);
 822         PROX_PANIC(tmp_pub_hash == NULL, "Failed to set up public hash table for NAT\n");
 823         plogx_info("public hash table allocated, with %d entries of size %d\n", hash_params.entries, hash_params.key_len);
 824
 825         hash_name[0]++;
 826         //hash_params.name[0]++;
 827         tmp_pub_entries = (struct public_entry *)prox_zmalloc(n_entries * sizeof(struct public_entry), socket);
 828         PROX_PANIC(tmp_pub_entries == NULL, "Failed to allocate memory for public NAT %u entries\n", n_entries);
 829         plogx_info("public data allocated, with %d entries of size %ld\n", n_entries, sizeof(struct private_flow_entry));
 830
 831         for (i = 0; i < n_static_ip_port; i++) {
 832                 ip_to = tmp_static_ip_port[i].public_ip;
 833                 ip_from = tmp_static_ip_port[i].private_ip;
 834                 port_to = tmp_static_ip_port[i].public_port;
 835                 port_from = tmp_static_ip_port[i].private_port;
 836                 private_key.ip_addr = ip_from;
 837                 private_key.l4_port = port_from;
 838                 ret = rte_hash_lookup(tmp_priv_hash, (const void *)&private_key);
 839                 PROX_PANIC(ret >= 0, "Key %x %x already exists in NAT private hash table\n", ip_from, port_from);
 840
 841                 idx = rte_hash_add_key(tmp_priv_ip_hash, (const void *)&ip_from);
 842                 PROX_PANIC(idx < 0, "Failed to add ip %x to NAT private hash table\n", ip_from);
 843                 ret = rte_hash_add_key(tmp_priv_hash, (const void *)&private_key);
 844                 PROX_PANIC(ret < 0, "Failed to add Key %x %x to NAT private hash table\n", ip_from, port_from);
 845                 tmp_priv_flow_entries[ret].ip_addr = ip_to;
 846                 tmp_priv_flow_entries[ret].flow_time = -1;
 847                 tmp_priv_flow_entries[ret].private_ip_idx = idx;
 848                 tmp_priv_flow_entries[ret].l4_port = port_to;
 849
 850                 public_key.ip_addr = ip_to;
 851                 public_key.l4_port = port_to;
 852                 ret = rte_hash_lookup(tmp_pub_hash, (const void *)&public_key);
 853                 PROX_PANIC(ret >= 0, "Key %d.%d.%d.%d port %x (for private IP %d.%d.%d.%d port %x) already exists in NAT public hash table fir IP %d.%d.%d.%d port %x\n", IP4(ip_to), port_to, IP4(ip_from), port_from, IP4(tmp_pub_entries[ret].ip_addr), tmp_pub_entries[ret].l4_port);
 854
 855                 ret = rte_hash_add_key(tmp_pub_hash, (const void *)&public_key);
 856                 PROX_PANIC(ret < 0, "Failed to add Key %x %x to NAT public hash table\n", ip_to, port_to);
 857                 tmp_pub_entries[ret].ip_addr = ip_from;
 858                 tmp_pub_entries[ret].l4_port = port_from;
 859                 tmp_pub_entries[ret].private_ip_idx = idx;
 860         }
 861
 862         for (uint8_t task_id = 0; task_id < targ->lconf->n_tasks_all; ++task_id) {
 863                 struct task_args *target_targ = (struct task_args *)&(targ->lconf->targs[task_id]);
 864                 enum task_mode smode = target_targ->mode;
 865                 if (CGNAT == smode) {
 866                         target_targ->public_ip_count = public_ip_count;
 867                         target_targ->private_ip_hash = tmp_priv_ip_hash;
 868                         target_targ->private_ip_port_hash = tmp_priv_hash;
 869                         target_targ->private_ip_info = tmp_priv_ip_info;
 870                         target_targ->private_flow_entries = tmp_priv_flow_entries;
 871                         target_targ->public_ip_port_hash = tmp_pub_hash;
 872                         target_targ->public_entries = tmp_pub_entries;
 873                         target_targ->public_ip_config_info = tmp_public_ip_config_info;
 874                 }
 875         }
 876         return 0;
 877 }
 878
 879 static void early_init_task_nat(struct task_args *targ)
 880 {
 881         int ret;
 882         const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
 883         if (!targ->private_ip_hash) {
 884                 ret = lua_to_hash_nat(targ, prox_lua(), GLOBAL, targ->nat_table, socket_id);
 885                 PROX_PANIC(ret != 0, "Failed to load NAT table from lua:\n%s\n", get_lua_to_errors());
 886         }
 887 }
 888
 889 static void init_task_nat(struct task_base *tbase, struct task_args *targ)
 890 {
 891         struct task_nat *task = (struct task_nat *)tbase;
 892         const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
 893
 894         /* Use destination IP by default. */
 895         task->private = targ->use_src;
 896
 897         PROX_PANIC(!strcmp(targ->nat_table, ""), "No nat table specified\n");
 898         task->lconf = targ->lconf;
 899         task->runtime_flags = targ->runtime_flags;
 900
 901         task->public_ip_count = targ->public_ip_count;
 902         task->last_ip = targ->public_ip_count;
 903         task->private_ip_hash = targ->private_ip_hash;
 904         task->private_ip_port_hash = targ->private_ip_port_hash;
 905         task->private_ip_info = targ->private_ip_info;
 906         task->private_flow_entries = targ->private_flow_entries;
 907         task->public_ip_port_hash = targ->public_ip_port_hash;
 908         task->public_entries = targ->public_entries;
 909         task->public_ip_config_info = targ->public_ip_config_info;
 910
 911         proto_ipsrc_portsrc_mask = _mm_set_epi32(BIT_0_TO_15, 0, ALL_32_BITS, BIT_8_TO_15);
 912         proto_ipdst_portdst_mask = _mm_set_epi32(BIT_16_TO_31, ALL_32_BITS, 0, BIT_8_TO_15);
 913
 914         struct lpm4 *lpm;
 915
 916         PROX_PANIC(!strcmp(targ->route_table, ""), "route table not specified\n");
 917         if (targ->flags & TASK_ARG_LOCAL_LPM) {
 918                 int ret = lua_to_lpm4(prox_lua(), GLOBAL, targ->route_table, socket_id, &lpm);
 919                 PROX_PANIC(ret, "Failed to load IPv4 LPM:\n%s\n", get_lua_to_errors());
 920                 prox_sh_add_socket(socket_id, targ->route_table, lpm);
 921                 task->number_free_rules = lpm->n_free_rules;
 922         } else {
 923                 lpm = prox_sh_find_socket(socket_id, targ->route_table);
 924                 if (!lpm) {
 925                         int ret = lua_to_lpm4(prox_lua(), GLOBAL, targ->route_table, socket_id, &lpm);
 926                         PROX_PANIC(ret, "Failed to load IPv4 LPM:\n%s\n", get_lua_to_errors());
 927                         prox_sh_add_socket(socket_id, targ->route_table, lpm);
 928                 }
 929         }
 930         task->ipv4_lpm = lpm->rte_lpm;
 931         task->next_hops = lpm->next_hops;
 932         task->number_free_rules = lpm->n_free_rules;
 933
 934         for (uint32_t i = 0; i < MAX_HOP_INDEX; i++) {
 935                 int tx_port = task->next_hops[i].mac_port.out_idx;
 936                 if ((tx_port > targ->nb_txports - 1) && (tx_port > targ->nb_txrings - 1)) {
 937                         PROX_PANIC(1, "Routing Table contains port %d but only %d tx port/ %d ring:\n", tx_port, targ->nb_txports, targ->nb_txrings);
 938                 }
 939         }
 940
 941         if (targ->nb_txrings) {
 942                 struct task_args *dtarg;
 943                 struct core_task ct;
 944                 for (uint32_t i = 0; i < targ->nb_txrings; ++i) {
 945                         ct = targ->core_task_set[0].core_task[i];
 946                         dtarg = core_targ_get(ct.core, ct.task);
 947                         dtarg = find_reachable_task_sending_to_port(dtarg);
 948                         task->src_mac[i] = (0x0000ffffffffffff & ((*(uint64_t*)&prox_port_cfg[dtarg->tx_port_queue[0].port].eth_addr))) | ((uint64_t)ETYPE_IPv4 << (64 - 16));
 949                         task->src_mac_from_dpdk_port[dtarg->tx_port_queue[0].port] = task->src_mac[i];
 950                         plogx_dbg("src_mac = %lx for port %d %d\n", task->src_mac[i], i, dtarg->tx_port_queue[0].port);
 951                 }
 952         } else {
 953                 for (uint32_t i = 0; i < targ->nb_txports; ++i) {
 954                         task->src_mac[i] = (0x0000ffffffffffff & ((*(uint64_t*)&prox_port_cfg[targ->tx_port_queue[i].port].eth_addr))) | ((uint64_t)ETYPE_IPv4 << (64 - 16));
 955                         task->src_mac_from_dpdk_port[targ->tx_port_queue[0].port] = task->src_mac[i];
 956                         plogx_dbg("src_mac = %lx for port %d %d\n", task->src_mac[i], i, targ->tx_port_queue[i].port);
 957                 }
 958         }
 959
 960         struct prox_port_cfg *port = find_reachable_port(targ);
 961         if (port) {
 962                 task->offload_crc = port->requested_tx_offload & (DEV_TX_OFFLOAD_IPV4_CKSUM | DEV_TX_OFFLOAD_UDP_CKSUM);
 963         }
 964 }
 965
 966 /* Basic static nat. */
 967 static struct task_init task_init_nat = {
 968         .mode = CGNAT,
 969         .mode_str = "cgnat",
 970         .early_init = early_init_task_nat,
 971         .init = init_task_nat,
 972         .handle = handle_nat_bulk,
 973 #ifdef SOFT_CRC
 974         .flag_features = TASK_FEATURE_TXQ_FLAGS_NOOFFLOADS|TASK_FEATURE_ROUTING|TASK_FEATURE_ZERO_RX,
 975 #else
 976         .flag_features = TASK_FEATURE_ROUTING|TASK_FEATURE_ZERO_RX,
 977 #endif
 978         .size = sizeof(struct task_nat),
 979 };
 980
 981 __attribute__((constructor)) static void reg_task_nat(void)
 982 {
 983         reg_task(&task_init_nat);
 984 }