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 #define IP4(x) x & 0xff, (x >> 8) & 0xff, (x >> 16) & 0xff, x >> 24
  49
  50 struct private_key {
  51                 uint32_t ip_addr;
  52                 uint16_t l4_port;
  53 } __attribute__((packed));
  54
  55 struct private_flow_entry {
  56         uint64_t flow_time;
  57         uint32_t ip_addr;
  58         uint32_t private_ip_idx;
  59         uint16_t l4_port;
  60 };
  61
  62 struct public_key {
  63         uint32_t ip_addr;
  64         uint16_t l4_port;
  65 } __attribute__((packed));
  66
  67 struct public_entry {
  68         uint32_t ip_addr;
  69         uint16_t l4_port;
  70         uint32_t private_ip_idx;
  71         uint8_t dpdk_port;
  72 };
  73
  74 struct public_ip_config_info {
  75         uint32_t public_ip;
  76         uint32_t max_port_count;
  77         uint32_t port_free_count;
  78         uint16_t *port_list;
  79 };
  80
  81 struct private_ip_info {
  82         uint64_t mac_aging_time;
  83         uint32_t public_ip;
  84         uint32_t public_ip_idx;
  85         struct rte_ether *private_mac;
  86         uint8_t static_entry;
  87 };
  88
  89 struct task_nat {
  90         struct task_base base;
  91         struct rte_hash  *private_ip_hash;
  92         struct rte_hash  *private_ip_port_hash;
  93         struct rte_hash  *public_ip_port_hash;
  94         struct private_flow_entry *private_flow_entries;
  95         struct public_entry *public_entries;
  96         struct next_hop *next_hops;
  97         struct lcore_cfg *lconf;
  98         struct rte_lpm *ipv4_lpm;
  99         uint32_t total_free_port_count;
 100         uint32_t number_free_rules;
 101         int    private;
 102         uint32_t public_ip_count;
 103         uint32_t last_ip;
 104         struct public_ip_config_info *public_ip_config_info;
 105         struct private_ip_info *private_ip_info;
 106         uint8_t runtime_flags;
 107         int offload_crc;
 108         uint64_t src_mac[PROX_MAX_PORTS];
 109         uint64_t src_mac_from_dpdk_port[PROX_MAX_PORTS];
 110         volatile int dump_public_hash;
 111         volatile int dump_private_hash;
 112 };
 113 static __m128i proto_ipsrc_portsrc_mask;
 114 static __m128i proto_ipdst_portdst_mask;
 115 struct pkt_eth_ipv4 {
 116         struct ether_hdr ether_hdr;
 117         struct ipv4_hdr  ipv4_hdr;
 118         struct udp_hdr  udp_hdr;
 119 } __attribute__((packed));
 120
 121 void task_cgnat_dump_public_hash(struct task_nat *task)
 122 {
 123         task->dump_public_hash = 1;
 124 }
 125
 126 void task_cgnat_dump_private_hash(struct task_nat *task)
 127 {
 128         task->dump_private_hash = 1;
 129 }
 130
 131 static void set_l2(struct task_nat *task, struct rte_mbuf *mbuf, uint8_t nh_idx)
 132 {
 133         struct ether_hdr *peth = rte_pktmbuf_mtod(mbuf, struct ether_hdr *);
 134         *((uint64_t *)(&peth->d_addr)) = task->next_hops[nh_idx].mac_port_8bytes;
 135         *((uint64_t *)(&peth->s_addr)) = task->src_mac[task->next_hops[nh_idx].mac_port.out_idx];
 136 }
 137
 138 static uint8_t route_ipv4(struct task_nat *task, struct rte_mbuf *mbuf)
 139 {
 140         struct pkt_eth_ipv4 *pkt = rte_pktmbuf_mtod(mbuf, struct pkt_eth_ipv4 *);
 141         struct ipv4_hdr *ip = &pkt->ipv4_hdr;
 142         struct ether_hdr *peth_out;
 143         uint8_t tx_port;
 144         uint32_t dst_ip;
 145
 146         switch(ip->next_proto_id) {
 147         case IPPROTO_TCP:
 148         case IPPROTO_UDP:
 149                 dst_ip = ip->dst_addr;
 150                 break;
 151         default:
 152                 /* Routing for other protocols is not implemented */
 153                 plogx_info("Routing nit implemented for this protocol\n");
 154                 return OUT_DISCARD;
 155         }
 156
 157 #if RTE_VERSION >= RTE_VERSION_NUM(16,4,0,1)
 158         uint32_t next_hop_index;
 159 #else
 160         uint8_t next_hop_index;
 161 #endif
 162         if (unlikely(rte_lpm_lookup(task->ipv4_lpm, rte_bswap32(dst_ip), &next_hop_index) != 0)) {
 163                 uint8_t* dst_ipp = (uint8_t*)&dst_ip;
 164                 plog_warn("lpm_lookup failed for ip %d.%d.%d.%d: rc = %d\n",
 165                         dst_ipp[0], dst_ipp[1], dst_ipp[2], dst_ipp[3], -ENOENT);
 166                 return OUT_DISCARD;
 167         }
 168
 169         tx_port = task->next_hops[next_hop_index].mac_port.out_idx;
 170         set_l2(task, mbuf, next_hop_index);
 171         return tx_port;
 172 }
 173
 174 static int release_ip(struct task_nat *task, uint32_t *ip_addr, int public_ip_idx)
 175 {
 176         return 0;
 177 }
 178
 179 static int release_port(struct task_nat *task, uint32_t public_ip_idx, uint16_t udp_src_port)
 180 {
 181         struct public_ip_config_info *public_ip_config_info = &task->public_ip_config_info[public_ip_idx];
 182         if (public_ip_config_info->max_port_count > public_ip_config_info->port_free_count) {
 183                 public_ip_config_info->port_list[public_ip_config_info->port_free_count] = udp_src_port;
 184                 public_ip_config_info->port_free_count++;
 185                 task->total_free_port_count ++;
 186                 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));
 187         } else {
 188                 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);
 189                 return -1;
 190         }
 191         return 0;
 192 }
 193
 194 static int get_new_ip(struct task_nat *task, uint32_t *ip_addr)
 195 {
 196         struct public_ip_config_info *ip_info;
 197         if (++task->last_ip >= task->public_ip_count)
 198                 task->last_ip = 0;
 199         for (uint32_t ip_idx = task->last_ip; ip_idx < task->public_ip_count; ip_idx++) {
 200                 ip_info = &task->public_ip_config_info[ip_idx];
 201                 plogx_dbg("Checking public IP index %d\n", ip_idx);
 202                 if ((ip_info->port_free_count) > 0) {
 203                         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);
 204                         *ip_addr = ip_info->public_ip;
 205                         task->last_ip = ip_idx;
 206                         return ip_idx;
 207                 }
 208         }
 209         for (uint32_t ip_idx = 0; ip_idx < task->last_ip; ip_idx++) {
 210                 ip_info = &task->public_ip_config_info[ip_idx];
 211                 if ((ip_info->port_free_count) > 0) {
 212                         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);
 213                         *ip_addr = ip_info->public_ip;
 214                         task->last_ip = ip_idx;
 215                         return ip_idx;
 216                 }
 217         }
 218         return -1;
 219 }
 220
 221 static int get_new_port(struct task_nat *task, uint32_t ip_idx, uint16_t *udp_src_port)
 222 {
 223         int ret;
 224         struct public_ip_config_info *public_ip_config_info = &task->public_ip_config_info[ip_idx];
 225         if (public_ip_config_info->port_free_count > 0) {
 226                 public_ip_config_info->port_free_count--;
 227                 *udp_src_port = public_ip_config_info->port_list[public_ip_config_info->port_free_count];
 228                 task->total_free_port_count --;
 229                 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));
 230         } else
 231                 return -1;
 232         return 0;
 233 }
 234
 235 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)
 236 {
 237         int ret;
 238         struct private_key private_key;
 239         struct public_key public_key;
 240 //      private_key.proto = proto;
 241         private_key.ip_addr = private_ip;
 242         private_key.l4_port = private_port;
 243         ret = rte_hash_del_key(task->private_ip_port_hash, (const void *)&private_key);
 244         if (ret < 0) {
 245                 plogx_info("Unable delete key ip %d.%d.%d.%d / port %x in private ip_port hash\n", IP4(private_ip), private_port);
 246                 return -1;
 247         } else {
 248                 plogx_dbg("Deleted ip %d.%d.%d.%d / port %x from private ip_port hash\n", IP4(private_ip), private_port);
 249         }
 250         public_key.ip_addr = public_ip;
 251         public_key.l4_port = public_port;
 252         ret = rte_hash_del_key(task->public_ip_port_hash, (const void *)&public_key);
 253         if (ret < 0) {
 254                 plogx_info("Unable delete key ip %d.%d.%d.%d / port %x in public ip_port hash\n", IP4(public_ip), public_port);
 255                 return -1;
 256         } else {
 257                 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);
 258                 release_port(task, public_ip_idx, public_port);
 259         }
 260         return 0;
 261 }
 262
 263 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)
 264 {
 265         struct private_key private_key;
 266         struct public_key public_key;
 267         uint32_t ip = task->public_ip_config_info[public_ip_idx].public_ip;
 268         int ret;
 269         if (get_new_port(task, public_ip_idx, port) < 0) {
 270                 plogx_info("Unable to find new port for IP %x\n", private_src_ip);
 271                 return -1;
 272         }
 273 //      private_key.proto = proto;
 274         private_key.ip_addr = private_src_ip;
 275         private_key.l4_port = private_udp_port;
 276         ret = rte_hash_add_key(task->private_ip_port_hash, (const void *)&private_key);
 277         if (ret < 0) {
 278                 plogx_info("Unable add ip %d.%d.%d.%d / port %x in private ip_port hash\n", IP4(private_src_ip), private_udp_port);
 279                 release_port(task, public_ip_idx, *port);
 280                 return -1;
 281         } else if (task->private_flow_entries[ret].ip_addr) {
 282                 plogx_dbg("Race condition properly handled: port alrerady added\n");
 283                 release_port(task, public_ip_idx, *port);
 284                 return ret;
 285         } else {
 286                 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);
 287         }
 288         task->private_flow_entries[ret].ip_addr = ip;
 289         task->private_flow_entries[ret].l4_port = *port;
 290         task->private_flow_entries[ret].flow_time = tsc;
 291         task->private_flow_entries[ret].private_ip_idx = private_ip_idx;
 292
 293         public_key.ip_addr = ip;
 294         public_key.l4_port = *port;
 295         plogx_dbg("Adding key ip %d.%d.%d.%d / port %x in public ip_port hash\n", IP4(ip), *port);
 296         ret = rte_hash_add_key(task->public_ip_port_hash, (const void *)&public_key);
 297         if (ret < 0) {
 298                 plogx_info("Unable add ip %x / port %x in public ip_port hash\n", ip, *port);
 299                 // TODO: remove from private_ip_port_hash
 300                 release_port(task, public_ip_idx, *port);
 301                 return -1;
 302         } else {
 303                 plogx_dbg("Added ip %d.%d.%d.%d / port %x in public ip_port hash\n", IP4(ip), *port);
 304         }
 305         task->public_entries[ret].ip_addr = private_src_ip;
 306         task->public_entries[ret].l4_port = private_udp_port;
 307         task->public_entries[ret].dpdk_port = mbuf->port;
 308         task->public_entries[ret].private_ip_idx = private_ip_idx;
 309         return ret;
 310 }
 311
 312 static int handle_nat_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
 313 {
 314         struct task_nat *task = (struct task_nat *)tbase;
 315         uint8_t out[MAX_PKT_BURST];
 316         uint16_t j;
 317         uint32_t *ip_addr, public_ip, private_ip;
 318         uint16_t *udp_src_port, port, private_port, public_port;
 319         struct pkt_eth_ipv4 *pkt[MAX_PKT_BURST];
 320         int ret, private_ip_idx, public_ip_idx = -1, port_idx;
 321         int new_entry = 0;
 322         uint8_t proto;
 323         uint64_t tsc = rte_rdtsc();
 324         void *keys[MAX_PKT_BURST];
 325         int32_t positions[MAX_PKT_BURST];
 326         int map[MAX_PKT_BURST] = {0};
 327
 328         if (unlikely(task->dump_public_hash)) {
 329                 const struct public_key *next_key;
 330                 void *next_data;
 331                 uint32_t iter = 0;
 332                 int i = 0;
 333                 int ret;
 334
 335                 while ((ret = rte_hash_iterate(task->public_ip_port_hash, (const void **)&next_key, &next_data, &iter)) >= 0) {
 336                         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);
 337                 }
 338                 task->dump_public_hash = 0;
 339         }
 340         if (unlikely(task->dump_private_hash)) {
 341                 const struct private_key *next_key;
 342                 void *next_data;
 343                 uint32_t iter = 0;
 344                 int i = 0;
 345                 int ret;
 346
 347                 while ((ret = rte_hash_iterate(task->private_ip_port_hash, (const void **)&next_key, &next_data, &iter)) >= 0) {
 348                         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);
 349                 }
 350                 task->dump_private_hash = 0;
 351         }
 352
 353         for (j = 0; j < n_pkts; ++j) {
 354                 PREFETCH0(mbufs[j]);
 355         }
 356         for (j = 0; j < n_pkts; ++j) {
 357                 pkt[j] = rte_pktmbuf_mtod(mbufs[j], struct pkt_eth_ipv4 *);
 358                 PREFETCH0(pkt[j]);
 359         }
 360         if (task->private) {
 361                 struct private_key key[MAX_PKT_BURST];
 362                 for (j = 0; j < n_pkts; ++j) {
 363                         /* Currently, only support eth/ipv4 packets */
 364                         if (pkt[j]->ether_hdr.ether_type != ETYPE_IPv4) {
 365                                 plogx_info("Currently, only support eth/ipv4 packets\n");
 366                                 out[j] = OUT_DISCARD;
 367                                 keys[j] = (void *)NULL;
 368                                 continue;
 369                         }
 370                         key[j].ip_addr = pkt[j]->ipv4_hdr.src_addr;
 371                         key[j].l4_port = pkt[j]->udp_hdr.src_port;
 372                         keys[j] = &key[j];
 373                 }
 374                 ret = rte_hash_lookup_bulk(task->private_ip_port_hash, (const void **)&keys, n_pkts, positions);
 375                 if (unlikely(ret < 0)) {
 376                         plogx_info("lookup_bulk failed in private_ip_port_hash\n");
 377                         return -1;
 378                 }
 379                 int n_new_mapping = 0;
 380                 for (j = 0; j < n_pkts; ++j) {
 381                         port_idx = positions[j];
 382                         if (unlikely(port_idx < 0)) {
 383                                 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);
 384                                 map[n_new_mapping] = j;
 385                                 keys[n_new_mapping++] = (void *)&(pkt[j]->ipv4_hdr.src_addr);
 386                         } else {
 387                                 ip_addr = &(pkt[j]->ipv4_hdr.src_addr);
 388                                 udp_src_port = &(pkt[j]->udp_hdr.src_port);
 389                                 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);
 390                                 *ip_addr = task->private_flow_entries[port_idx].ip_addr;
 391                                 *udp_src_port = task->private_flow_entries[port_idx].l4_port;
 392                                 uint64_t flow_time = task->private_flow_entries[port_idx].flow_time;
 393                                 if (flow_time + tsc_hz < tsc) {
 394                                         task->private_flow_entries[port_idx].flow_time = tsc;
 395                                 }
 396                                 private_ip_idx = task->private_flow_entries[port_idx].private_ip_idx;
 397                                 if (task->private_ip_info[private_ip_idx].mac_aging_time + tsc_hz < tsc)
 398                                         task->private_ip_info[private_ip_idx].mac_aging_time = tsc;
 399                                 prox_ip_udp_cksum(mbufs[j], &pkt[j]->ipv4_hdr, sizeof(struct ether_hdr), sizeof(struct ipv4_hdr), task->offload_crc);
 400                                 out[j] =  route_ipv4(task, mbufs[j]);
 401                         }
 402                 }
 403
 404                 if (n_new_mapping) {
 405                         // Find whether at least IP is already known...
 406                         ret = rte_hash_lookup_bulk(task->private_ip_hash, (const void **)&keys, n_new_mapping, positions);
 407                         if (unlikely(ret < 0)) {
 408                                 plogx_info("lookup_bulk failed for private_ip_hash\n");
 409                                 for (int k = 0; k < n_new_mapping; ++k) {
 410                                         j = map[k];
 411                                         out[j] = OUT_DISCARD;
 412                                 }
 413                                 n_new_mapping = 0;
 414                         }
 415                         for (int k = 0; k < n_new_mapping; ++k) {
 416                                 private_ip_idx = positions[k];
 417                                 j = map[k];
 418                                 ip_addr = &(pkt[j]->ipv4_hdr.src_addr);
 419                                 proto = pkt[j]->ipv4_hdr.next_proto_id;
 420                                 udp_src_port = &(pkt[j]->udp_hdr.src_port);
 421                                 int new_ip_entry = 0;
 422
 423                                 if (unlikely(private_ip_idx < 0)) {
 424                                         private_ip = *ip_addr;
 425                                         private_port = *udp_src_port;
 426                                         plogx_dbg("Did not find private ip %d.%d.%d.%d in ip hash table, looking for new public ip\n", IP4(*ip_addr));
 427                                         // IP not found, need to get a new IP/port mapping
 428                                         public_ip_idx = get_new_ip(task, &public_ip);
 429                                         if (public_ip_idx < 0) {
 430                                                 plogx_info("Unable to find new ip/port\n");
 431                                                 out[j] = OUT_DISCARD;
 432                                                 continue;
 433                                         } else {
 434                                                 plogx_dbg("found new public ip %d.%d.%d.%d at public IP index %d\n", IP4(public_ip), public_ip_idx);
 435                                         }
 436                                         private_ip_idx = rte_hash_add_key(task->private_ip_hash, (const void *)ip_addr);
 437                                         // The key might be added multiple time - in case the same key was present in the bulk_lookup multiple times
 438                                         // As such this is not an issue - the add_key will returns the index as for a new key
 439                                         // This scenario should not happen often in real time use case
 440                                         // as a for a new flow (flow renewal), probably only one packet will be sent (e.g. TCP SYN)
 441                                         if (private_ip_idx < 0) {
 442                                                 release_ip(task, &public_ip, public_ip_idx);
 443                                                 plogx_info("Unable add ip %d.%d.%d.%d in private ip hash\n", IP4(*ip_addr));
 444                                                 out[j] = OUT_DISCARD;
 445                                                 continue;
 446                                         } else if (task->private_ip_info[private_ip_idx].public_ip) {
 447                                                 plogx_info("race condition properly handled : ip %d.%d.%d.%d already in private ip hash\n", IP4(*ip_addr));
 448                                                 release_ip(task, &public_ip, public_ip_idx);
 449                                                 public_ip = task->private_ip_info[private_ip_idx].public_ip;
 450                                                 public_ip_idx = task->private_ip_info[private_ip_idx].public_ip_idx;
 451                                         } else {
 452                                                 plogx_dbg("Added ip %d.%d.%d.%d in private ip hash\n", IP4(*ip_addr));
 453                                                 rte_memcpy(&task->private_ip_info[private_ip_idx].private_mac, ((uint8_t *)pkt) + 6, 6);
 454                                                 task->private_ip_info[private_ip_idx].public_ip = public_ip;
 455                                                 task->private_ip_info[private_ip_idx].static_entry = 0;
 456                                                 task->private_ip_info[private_ip_idx].public_ip_idx = public_ip_idx;
 457                                                 new_ip_entry = 1;
 458                                         }
 459                                 } else {
 460                                         public_ip = task->private_ip_info[private_ip_idx].public_ip;
 461                                         public_ip_idx = task->private_ip_info[private_ip_idx].public_ip_idx;
 462                                 }
 463                                 port_idx = add_new_port_entry(task, proto, public_ip_idx, private_ip_idx, *ip_addr, *udp_src_port, mbufs[j], tsc, &public_port);
 464                                 if (port_idx < 0) {
 465                                         // TODO: delete IP in ip_hash
 466                                         if ((new_ip_entry) && (task->last_ip != 0)) {
 467                                                 release_ip(task, &public_ip, public_ip_idx);
 468                                                 task->last_ip--;
 469                                         } else if (new_ip_entry) {
 470                                                 release_ip(task, &public_ip, public_ip_idx);
 471                                                 task->last_ip = task->public_ip_count-1;
 472                                         }
 473                                         plogx_info("Failed to add new port entry\n");
 474                                         out[j] = OUT_DISCARD;
 475                                         continue;
 476                                 } else {
 477                                         private_ip = *ip_addr;
 478                                         private_port = *udp_src_port;
 479                                         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);
 480                                 }
 481                                 // task->private_flow_entries[port_idx].ip_addr = task->private_ip_info[private_ip_idx].public_ip;
 482                                 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);
 483                                 *ip_addr = public_ip ;
 484                                 *udp_src_port = public_port;
 485                                 uint64_t flow_time = task->private_flow_entries[port_idx].flow_time;
 486                                 if (flow_time + tsc_hz < tsc) {
 487                                         task->private_flow_entries[port_idx].flow_time = tsc;
 488                                 }
 489                                 if (task->private_ip_info[private_ip_idx].mac_aging_time + tsc_hz < tsc)
 490                                         task->private_ip_info[private_ip_idx].mac_aging_time = tsc;
 491                                 prox_ip_udp_cksum(mbufs[j], &pkt[j]->ipv4_hdr, sizeof(struct ether_hdr), sizeof(struct ipv4_hdr), task->offload_crc);
 492                                 // TODO: if route fails while just added new key in table, should we delete the key from the table?
 493                                 out[j] =  route_ipv4(task, mbufs[j]);
 494                                 if (out[j] && new_entry) {
 495                                         delete_port_entry(task, proto, private_ip, private_port, *ip_addr, *udp_src_port, public_ip_idx);
 496                                         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);
 497                                 }
 498                         }
 499                 }
 500                 return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
 501         } else {
 502                 struct public_key public_key[MAX_PKT_BURST];
 503                 for (j = 0; j < n_pkts; ++j) {
 504                         /* Currently, only support eth/ipv4 packets */
 505                         if (pkt[j]->ether_hdr.ether_type != ETYPE_IPv4) {
 506                                 plogx_info("Currently, only support eth/ipv4 packets\n");
 507                                 out[j] = OUT_DISCARD;
 508                                 keys[j] = (void *)NULL;
 509                                 continue;
 510                         }
 511                         public_key[j].ip_addr = pkt[j]->ipv4_hdr.dst_addr;
 512                         public_key[j].l4_port = pkt[j]->udp_hdr.dst_port;
 513                         keys[j] = &public_key[j];
 514                 }
 515                 ret = rte_hash_lookup_bulk(task->public_ip_port_hash, (const void **)&keys, n_pkts, positions);
 516                 if (ret < 0) {
 517                         plogx_err("Failed lookup bulk public_ip_port_hash\n");
 518                         return -1;
 519                 }
 520                 for (j = 0; j < n_pkts; ++j) {
 521                         port_idx = positions[j];
 522                         ip_addr = &(pkt[j]->ipv4_hdr.dst_addr);
 523                         udp_src_port = &(pkt[j]->udp_hdr.dst_port);
 524                         if (port_idx < 0) {
 525                                 plogx_err("Failed to find ip/port %d.%d.%d.%d/%x in public_ip_port_hash\n", IP4(*ip_addr), *udp_src_port);
 526                                 out[j] = OUT_DISCARD;
 527                         } else {
 528                                 plogx_dbg("Found ip/port %d.%d.%d.%d/%x in public_ip_port_hash\n", IP4(*ip_addr), *udp_src_port);
 529                                 *ip_addr = task->public_entries[port_idx].ip_addr;
 530                                 *udp_src_port = task->public_entries[port_idx].l4_port;
 531                                 private_ip_idx = task->public_entries[port_idx].private_ip_idx;
 532                                 plogx_dbg("Found private IP info for ip %d.%d.%d.%d\n", IP4(*ip_addr));
 533                                 rte_memcpy(((uint8_t *)(pkt[j])) + 0, &task->private_ip_info[private_ip_idx].private_mac, 6);
 534                                 rte_memcpy(((uint8_t *)(pkt[j])) + 6, &task->src_mac_from_dpdk_port[task->public_entries[port_idx].dpdk_port], 6);
 535                                 out[j] = task->public_entries[port_idx].dpdk_port;
 536                         }
 537                         prox_ip_udp_cksum(mbufs[j], &pkt[j]->ipv4_hdr, sizeof(struct ether_hdr), sizeof(struct ipv4_hdr), task->offload_crc);
 538                 }
 539                 return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
 540         }
 541
 542 }
 543
 544 static int lua_to_hash_nat(struct task_args *targ, struct lua_State *L, enum lua_place from, const char *name, uint8_t socket)
 545 {
 546         struct rte_hash *tmp_priv_ip_hash, *tmp_priv_hash, *tmp_pub_hash;
 547         struct private_flow_entry *tmp_priv_flow_entries;
 548         struct public_entry *tmp_pub_entries;
 549         uint32_t n_entries = 0;;
 550         uint32_t ip_from, ip_to;
 551         uint16_t port_from, port_to;
 552         int ret, idx, pop, pop2, pop3, n_static_entries = 0;
 553         uint32_t dst_ip1, dst_ip2;
 554         struct val_range dst_port;
 555         struct public_ip_config_info *ip_info;
 556         struct public_ip_config_info *tmp_public_ip_config_info;
 557
 558         if ((pop = lua_getfrom(L, from, name)) < 0)
 559                 return -1;
 560
 561         if (!lua_istable(L, -1)) {
 562                 plogx_err("Can't read cgnat since data is not a table\n");
 563                 return -1;
 564         }
 565
 566         struct tmp_public_ip {
 567                 uint32_t ip_beg;
 568                 uint32_t ip_end;
 569                 uint16_t port_beg;
 570                 uint16_t port_end;
 571         };
 572         struct tmp_static_ip {
 573                 uint32_t private_ip;
 574                 uint32_t public_ip;
 575         };
 576         struct tmp_static_ip_port {
 577                 uint32_t private_ip;
 578                 uint32_t public_ip;
 579                 uint32_t n_ports;
 580                 uint16_t private_port;
 581                 uint16_t public_port;
 582                 int ip_found;
 583                 uint8_t port_found;
 584         };
 585         uint32_t n_public_groups = 0;
 586         uint32_t n_public_ip = 0;
 587         uint32_t n_static_ip = 0;
 588         uint32_t n_static_ip_port = 0;
 589         unsigned int i = 0;
 590         struct tmp_public_ip *tmp_public_ip = NULL;
 591         struct tmp_static_ip *tmp_static_ip = NULL;
 592         struct tmp_static_ip_port *tmp_static_ip_port = NULL;
 593
 594         // Look for Dynamic entries configuration
 595         plogx_info("Reading dynamic NAT table\n");
 596         if ((pop2 = lua_getfrom(L, TABLE, "dynamic")) < 0) {
 597                 plogx_info("No dynamic table found\n");
 598         } else {
 599                 uint64_t n_ip, n_port;
 600                 if (!lua_istable(L, -1)) {
 601                         plogx_err("Can't read cgnat since data is not a table\n");
 602                         return -1;
 603                 }
 604                 lua_len(L, -1);
 605                 n_public_groups = lua_tointeger(L, -1);
 606                 plogx_info("%d groups of public IP\n", n_public_groups);
 607                 tmp_public_ip = (struct tmp_public_ip *)malloc(n_public_groups * sizeof(struct tmp_public_ip));
 608                 PROX_PANIC(tmp_public_ip == NULL, "Failed to allocated tmp_public_ip\n");
 609                 lua_pop(L, 1);
 610                 lua_pushnil(L);
 611
 612                 while (lua_next(L, -2)) {
 613                         if (lua_to_ip(L, TABLE, "public_ip_range_start", &dst_ip1) ||
 614                                 lua_to_ip(L, TABLE, "public_ip_range_stop", &dst_ip2) ||
 615                                 lua_to_val_range(L, TABLE, "public_port", &dst_port))
 616                                         return -1;
 617                         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);
 618                         PROX_PANIC(dst_port.end < dst_port.beg, "public_port error: %d < %d\n", dst_port.end, dst_port.beg);
 619                         n_ip = dst_ip2 - dst_ip1 + 1;
 620                         n_port =  dst_port.end - dst_port.beg + 1;
 621                         n_public_ip += n_ip;
 622                         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);
 623                         tmp_public_ip[i].ip_beg = dst_ip1;
 624                         tmp_public_ip[i].ip_end = dst_ip2;
 625                         tmp_public_ip[i].port_beg = dst_port.beg;
 626                         tmp_public_ip[i++].port_end = dst_port.end;
 627                         n_entries += n_ip * n_port;
 628                         lua_pop(L, 1);
 629                 }
 630                 lua_pop(L, pop2);
 631
 632         }
 633         i = 0;
 634         if ((pop2 = lua_getfrom(L, TABLE, "static_ip")) < 0) {
 635                 plogx_info("No static ip table found\n");
 636         } else {
 637                 if (!lua_istable(L, -1)) {
 638                         plogx_err("Can't read cgnat since data is not a table\n");
 639                         return -1;
 640                 }
 641
 642                 lua_len(L, -1);
 643                 n_static_ip = lua_tointeger(L, -1);
 644                 plogx_info("%d entries in static ip table\n", n_static_ip);
 645                 lua_pop(L, 1);
 646                 tmp_static_ip = (struct tmp_static_ip *)malloc(n_static_ip * sizeof(struct tmp_static_ip));
 647                 PROX_PANIC(tmp_static_ip == NULL, "Failed to allocated tmp_static_ip\n");
 648                 lua_pushnil(L);
 649                 while (lua_next(L, -2)) {
 650                         if (lua_to_ip(L, TABLE, "src_ip", &ip_from) ||
 651                                 lua_to_ip(L, TABLE, "dst_ip", &ip_to))
 652                                         return -1;
 653                         ip_from = rte_bswap32(ip_from);
 654                         ip_to = rte_bswap32(ip_to);
 655                         tmp_static_ip[i].private_ip = ip_from;
 656                         tmp_static_ip[i++].public_ip = ip_to;
 657                         for (unsigned int j = 0; j < n_public_groups; j++) {
 658                                 if ((tmp_public_ip[j].ip_beg <= ip_to) && (ip_to <= tmp_public_ip[j].ip_end)) {
 659                                         PROX_PANIC(1, "list of static ip mapping overlap with list of dynamic IP => not supported yet\n");
 660                                 }
 661                         }
 662                         n_public_ip++;
 663                         lua_pop(L, 1);
 664                 }
 665                 lua_pop(L, pop2);
 666         }
 667
 668         i = 0;
 669         if ((pop2 = lua_getfrom(L, TABLE, "static_ip_port")) < 0) {
 670                 plogx_info("No static table found\n");
 671         } else {
 672                 if (!lua_istable(L, -1)) {
 673                         plogx_err("Can't read cgnat since data is not a table\n");
 674                         return -1;
 675                 }
 676
 677                 lua_len(L, -1);
 678                 n_static_ip_port = lua_tointeger(L, -1);
 679                 plogx_info("%d entries in static table\n", n_static_ip_port);
 680                 lua_pop(L, 1);
 681                 tmp_static_ip_port = (struct tmp_static_ip_port *)malloc(n_static_ip_port * sizeof(struct tmp_static_ip_port));
 682                 PROX_PANIC(tmp_static_ip_port == NULL, "Failed to allocated tmp_static_ip_port\n");
 683                 lua_pushnil(L);
 684
 685                 while (lua_next(L, -2)) {
 686                         if (lua_to_ip(L, TABLE, "src_ip", &ip_from) ||
 687                                 lua_to_ip(L, TABLE, "dst_ip", &ip_to) ||
 688                                 lua_to_port(L, TABLE, "src_port", &port_from) ||
 689                                 lua_to_port(L, TABLE, "dst_port", &port_to))
 690                                         return -1;
 691
 692                         ip_from = rte_bswap32(ip_from);
 693                         ip_to = rte_bswap32(ip_to);
 694                         port_from = rte_bswap16(port_from);
 695                         port_to = rte_bswap16(port_to);
 696                         tmp_static_ip_port[i].private_ip = ip_from;
 697                         tmp_static_ip_port[i].public_ip = ip_to;
 698                         tmp_static_ip_port[i].private_port = port_from;
 699                         tmp_static_ip_port[i].public_port = port_to;
 700                         tmp_static_ip_port[i].n_ports = 1;
 701                         for (unsigned int j = 0; j < n_public_groups; j++) {
 702                                 if ((tmp_public_ip[j].ip_beg <= rte_bswap32(ip_to)) && (rte_bswap32(ip_to) <= tmp_public_ip[j].ip_end)) {
 703                                         tmp_static_ip_port[i].ip_found = j + 11;
 704                                         PROX_PANIC(1, "list of static ip/port mapping overlap with list of dynamic IP => not supported yet\n");
 705                                 }
 706                         }
 707                         for (unsigned int j = 0; j < n_static_ip; j++) {
 708                                 if ((tmp_static_ip[j].public_ip == ip_to) ) {
 709                                         tmp_static_ip_port[i].ip_found = j + 1;
 710                                         PROX_PANIC(1, "list of static ip/port mapping overlap with list of static ip => not supported yet\n");
 711                                 }
 712                         }
 713                         for (unsigned int j = 0; j <= i; j++) {
 714                                 if (ip_to == tmp_static_ip_port[j].public_ip) {
 715                                         tmp_static_ip_port[i].ip_found = j + 1;
 716                                         tmp_static_ip_port[j].n_ports++;
 717                                         tmp_static_ip_port[i].n_ports = 0;
 718                                 }
 719                         }
 720                         i++;
 721                         if (!tmp_static_ip_port[i].ip_found) {
 722                                 n_public_ip++;
 723                                 n_entries++;
 724                         }
 725                         lua_pop(L, 1);
 726                 }
 727                 lua_pop(L, pop2);
 728         }
 729         lua_pop(L, pop);
 730
 731         tmp_public_ip_config_info = (struct public_ip_config_info *)prox_zmalloc(n_public_ip * sizeof(struct public_ip_config_info), socket);
 732         PROX_PANIC(tmp_public_ip_config_info == NULL, "Failed to allocate PUBLIC IP INFO\n");
 733         plogx_info("%d PUBLIC IP INFO allocated\n", n_public_ip);
 734
 735         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);
 736         PROX_PANIC(tmp_priv_ip_info == NULL, "Failed to allocate PRIVATE IP INFO\n");
 737         plogx_info("%d PRIVATE IP INFO allocated\n", 4 * n_public_ip);
 738
 739         uint32_t ip_free_count = 0;
 740         for (i = 0; i < n_public_groups; i++) {
 741                 for (uint32_t ip = tmp_public_ip[i].ip_beg; ip <= tmp_public_ip[i].ip_end; ip++) {
 742                         ip_info = &tmp_public_ip_config_info[ip_free_count];
 743                         ip_info->public_ip = rte_bswap32(ip);
 744                         ip_info->port_list = (uint16_t *)prox_zmalloc((dst_port.end - dst_port.beg) * sizeof(uint16_t), socket);
 745                         PROX_PANIC(ip_info->port_list == NULL, "Failed to allocate list of ports for ip %x\n", ip);
 746                         for (uint32_t port = tmp_public_ip[i].port_beg; port <= tmp_public_ip[i].port_end; port++) {
 747                                 ip_info->port_list[ip_info->port_free_count] = rte_bswap16(port);
 748                                 ip_info->port_free_count++;
 749                         }
 750                         ip_info->max_port_count = ip_info->port_free_count;
 751                         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);
 752                         ip_free_count++;
 753                 }
 754         }
 755         uint32_t public_ip_count = ip_free_count;
 756         for (i = 0; i < n_static_ip; i++) {
 757                 ip_info = &tmp_public_ip_config_info[ip_free_count];
 758                 ip_info->public_ip = tmp_static_ip[i].public_ip;
 759                 ip_info->port_list = NULL;
 760                 ip_info->max_port_count = 0;
 761                 ip_free_count++;
 762         }
 763         for (i = 0; i < n_static_ip_port; i++) {
 764                 if (!tmp_static_ip_port[i].ip_found) {
 765                         ip_info = &tmp_public_ip_config_info[ip_free_count];
 766                         ip_info->public_ip = tmp_static_ip_port[i].public_ip;
 767                         ip_info->port_list = (uint16_t *)prox_zmalloc(tmp_static_ip_port[i].n_ports * sizeof(uint16_t), socket);
 768                         PROX_PANIC(ip_info->port_list == NULL, "Failed to allocate list of ports for ip %x\n", tmp_static_ip_port[i].public_ip);
 769                         ip_info->port_list[ip_info->port_free_count] = tmp_static_ip_port[i].public_port;
 770                         ip_info->port_free_count++;
 771                         ip_info->max_port_count = ip_info->port_free_count;
 772                         ip_free_count++;
 773                 } else {
 774                         for (unsigned j = 0; j < ip_free_count; j++) {
 775                                 ip_info = &tmp_public_ip_config_info[j];
 776                                 if (ip_info->public_ip == tmp_static_ip_port[i].public_ip) {
 777                                         ip_info = &tmp_public_ip_config_info[j];
 778                                         ip_info->port_list[ip_info->port_free_count] = tmp_static_ip_port[i].public_port;
 779                                         ip_info->port_free_count++;
 780                                         ip_info->max_port_count = ip_info->port_free_count;
 781                                         break;
 782                                 }
 783                         }
 784                 }
 785         }
 786         plogx_info("%d entries in dynamic table\n", n_entries);
 787
 788         n_entries = n_entries * 4;
 789         static char hash_name[30];
 790         sprintf(hash_name, "A%03d_hash_nat_table", targ->lconf->id);
 791         struct rte_hash_parameters hash_params = {
 792                 .name = hash_name,
 793                 .entries = n_entries,
 794                 .key_len = sizeof(struct private_key),
 795                 .hash_func = rte_hash_crc,
 796                 .hash_func_init_val = 0,
 797         };
 798         plogx_info("hash table name = %s\n", hash_params.name);
 799         struct private_key private_key;
 800         struct public_key public_key;
 801         tmp_priv_hash = rte_hash_create(&hash_params);
 802         PROX_PANIC(tmp_priv_hash == NULL, "Failed to set up private hash table for NAT\n");
 803         plogx_info("private hash table allocated, with %d entries of size %d\n", hash_params.entries, hash_params.key_len);
 804
 805         tmp_priv_flow_entries = (struct private_flow_entry *)prox_zmalloc(n_entries * sizeof(struct private_flow_entry), socket);
 806         PROX_PANIC(tmp_priv_flow_entries == NULL, "Failed to allocate memory for private NAT %u entries\n", n_entries);
 807         plogx_info("private data allocated, with %d entries of size %ld\n", n_entries, sizeof(struct private_flow_entry));
 808
 809         hash_name[0]++;
 810         //hash_params.name[0]++;
 811         plogx_info("hash table name = %s\n", hash_params.name);
 812         hash_params.key_len = sizeof(uint32_t);
 813         hash_params.entries = 4 * ip_free_count;
 814         tmp_priv_ip_hash = rte_hash_create(&hash_params);
 815         PROX_PANIC(tmp_priv_ip_hash == NULL, "Failed to set up private ip hash table for NAT\n");
 816         plogx_info("private ip hash table allocated, with %d entries of size %d\n", hash_params.entries, hash_params.key_len);
 817
 818         hash_name[0]++;
 819         //hash_params.name[0]++;
 820         plogx_info("hash table name = %s\n", hash_params.name);
 821         hash_params.entries = n_entries;
 822         hash_params.key_len = sizeof(struct public_key),
 823         tmp_pub_hash = rte_hash_create(&hash_params);
 824         PROX_PANIC(tmp_pub_hash == NULL, "Failed to set up public hash table for NAT\n");
 825         plogx_info("public hash table allocated, with %d entries of size %d\n", hash_params.entries, hash_params.key_len);
 826
 827         hash_name[0]++;
 828         //hash_params.name[0]++;
 829         tmp_pub_entries = (struct public_entry *)prox_zmalloc(n_entries * sizeof(struct public_entry), socket);
 830         PROX_PANIC(tmp_pub_entries == NULL, "Failed to allocate memory for public NAT %u entries\n", n_entries);
 831         plogx_info("public data allocated, with %d entries of size %ld\n", n_entries, sizeof(struct private_flow_entry));
 832
 833         for (i = 0; i < n_static_ip_port; i++) {
 834                 ip_to = tmp_static_ip_port[i].public_ip;
 835                 ip_from = tmp_static_ip_port[i].private_ip;
 836                 port_to = tmp_static_ip_port[i].public_port;
 837                 port_from = tmp_static_ip_port[i].private_port;
 838                 private_key.ip_addr = ip_from;
 839                 private_key.l4_port = port_from;
 840                 ret = rte_hash_lookup(tmp_priv_hash, (const void *)&private_key);
 841                 PROX_PANIC(ret >= 0, "Key %x %x already exists in NAT private hash table\n", ip_from, port_from);
 842
 843                 idx = rte_hash_add_key(tmp_priv_ip_hash, (const void *)&ip_from);
 844                 PROX_PANIC(idx < 0, "Failed to add ip %x to NAT private hash table\n", ip_from);
 845                 ret = rte_hash_add_key(tmp_priv_hash, (const void *)&private_key);
 846                 PROX_PANIC(ret < 0, "Failed to add Key %x %x to NAT private hash table\n", ip_from, port_from);
 847                 tmp_priv_flow_entries[ret].ip_addr = ip_to;
 848                 tmp_priv_flow_entries[ret].flow_time = -1;
 849                 tmp_priv_flow_entries[ret].private_ip_idx = idx;
 850                 tmp_priv_flow_entries[ret].l4_port = port_to;
 851
 852                 public_key.ip_addr = ip_to;
 853                 public_key.l4_port = port_to;
 854                 ret = rte_hash_lookup(tmp_pub_hash, (const void *)&public_key);
 855                 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);
 856
 857                 ret = rte_hash_add_key(tmp_pub_hash, (const void *)&public_key);
 858                 PROX_PANIC(ret < 0, "Failed to add Key %x %x to NAT public hash table\n", ip_to, port_to);
 859                 tmp_pub_entries[ret].ip_addr = ip_from;
 860                 tmp_pub_entries[ret].l4_port = port_from;
 861                 tmp_pub_entries[ret].private_ip_idx = idx;
 862         }
 863
 864         for (uint8_t task_id = 0; task_id < targ->lconf->n_tasks_all; ++task_id) {
 865                 struct task_args *target_targ = (struct task_args *)&(targ->lconf->targs[task_id]);
 866                 enum task_mode smode = target_targ->mode;
 867                 if (CGNAT == smode) {
 868                         target_targ->public_ip_count = public_ip_count;
 869                         target_targ->private_ip_hash = tmp_priv_ip_hash;
 870                         target_targ->private_ip_port_hash = tmp_priv_hash;
 871                         target_targ->private_ip_info = tmp_priv_ip_info;
 872                         target_targ->private_flow_entries = tmp_priv_flow_entries;
 873                         target_targ->public_ip_port_hash = tmp_pub_hash;
 874                         target_targ->public_entries = tmp_pub_entries;
 875                         target_targ->public_ip_config_info = tmp_public_ip_config_info;
 876                 }
 877         }
 878         return 0;
 879 }
 880
 881 static void early_init_task_nat(struct task_args *targ)
 882 {
 883         int ret;
 884         const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
 885         if (!targ->private_ip_hash) {
 886                 ret = lua_to_hash_nat(targ, prox_lua(), GLOBAL, targ->nat_table, socket_id);
 887                 PROX_PANIC(ret != 0, "Failed to load NAT table from lua:\n%s\n", get_lua_to_errors());
 888         }
 889 }
 890
 891 static void init_task_nat(struct task_base *tbase, struct task_args *targ)
 892 {
 893         struct task_nat *task = (struct task_nat *)tbase;
 894         const int socket_id = rte_lcore_to_socket_id(targ->lconf->id);
 895
 896         /* Use destination IP by default. */
 897         task->private = targ->use_src;
 898
 899         PROX_PANIC(!strcmp(targ->nat_table, ""), "No nat table specified\n");
 900         task->lconf = targ->lconf;
 901         task->runtime_flags = targ->runtime_flags;
 902
 903         task->public_ip_count = targ->public_ip_count;
 904         task->last_ip = targ->public_ip_count;
 905         task->private_ip_hash = targ->private_ip_hash;
 906         task->private_ip_port_hash = targ->private_ip_port_hash;
 907         task->private_ip_info = targ->private_ip_info;
 908         task->private_flow_entries = targ->private_flow_entries;
 909         task->public_ip_port_hash = targ->public_ip_port_hash;
 910         task->public_entries = targ->public_entries;
 911         task->public_ip_config_info = targ->public_ip_config_info;
 912
 913         proto_ipsrc_portsrc_mask = _mm_set_epi32(BIT_0_TO_15, 0, ALL_32_BITS, BIT_8_TO_15);
 914         proto_ipdst_portdst_mask = _mm_set_epi32(BIT_16_TO_31, ALL_32_BITS, 0, BIT_8_TO_15);
 915
 916         struct lpm4 *lpm;
 917
 918         PROX_PANIC(!strcmp(targ->route_table, ""), "route table not specified\n");
 919         if (targ->flags & TASK_ARG_LOCAL_LPM) {
 920                 int ret = lua_to_lpm4(prox_lua(), GLOBAL, targ->route_table, socket_id, &lpm);
 921                 PROX_PANIC(ret, "Failed to load IPv4 LPM:\n%s\n", get_lua_to_errors());
 922                 prox_sh_add_socket(socket_id, targ->route_table, lpm);
 923                 task->number_free_rules = lpm->n_free_rules;
 924         } else {
 925                 lpm = prox_sh_find_socket(socket_id, targ->route_table);
 926                 if (!lpm) {
 927                         int ret = lua_to_lpm4(prox_lua(), GLOBAL, targ->route_table, socket_id, &lpm);
 928                         PROX_PANIC(ret, "Failed to load IPv4 LPM:\n%s\n", get_lua_to_errors());
 929                         prox_sh_add_socket(socket_id, targ->route_table, lpm);
 930                 }
 931         }
 932         task->ipv4_lpm = lpm->rte_lpm;
 933         task->next_hops = lpm->next_hops;
 934         task->number_free_rules = lpm->n_free_rules;
 935
 936         for (uint32_t i = 0; i < MAX_HOP_INDEX; i++) {
 937                 int tx_port = task->next_hops[i].mac_port.out_idx;
 938                 if ((tx_port > targ->nb_txports - 1) && (tx_port > targ->nb_txrings - 1)) {
 939                         PROX_PANIC(1, "Routing Table contains port %d but only %d tx port/ %d ring:\n", tx_port, targ->nb_txports, targ->nb_txrings);
 940                 }
 941         }
 942
 943         if (targ->nb_txrings) {
 944                 struct task_args *dtarg;
 945                 struct core_task ct;
 946                 for (uint32_t i = 0; i < targ->nb_txrings; ++i) {
 947                         ct = targ->core_task_set[0].core_task[i];
 948                         dtarg = core_targ_get(ct.core, ct.task);
 949                         dtarg = find_reachable_task_sending_to_port(dtarg);
 950                         task->src_mac[i] = (0x0000ffffffffffff & ((*(uint64_t*)&prox_port_cfg[dtarg->tx_port_queue[0].port].eth_addr))) | ((uint64_t)ETYPE_IPv4 << (64 - 16));
 951                         task->src_mac_from_dpdk_port[dtarg->tx_port_queue[0].port] = task->src_mac[i];
 952                         plogx_dbg("src_mac = %lx for port %d %d\n", task->src_mac[i], i, dtarg->tx_port_queue[0].port);
 953                 }
 954         } else {
 955                 for (uint32_t i = 0; i < targ->nb_txports; ++i) {
 956                         task->src_mac[i] = (0x0000ffffffffffff & ((*(uint64_t*)&prox_port_cfg[targ->tx_port_queue[i].port].eth_addr))) | ((uint64_t)ETYPE_IPv4 << (64 - 16));
 957                         task->src_mac_from_dpdk_port[targ->tx_port_queue[0].port] = task->src_mac[i];
 958                         plogx_dbg("src_mac = %lx for port %d %d\n", task->src_mac[i], i, targ->tx_port_queue[i].port);
 959                 }
 960         }
 961
 962         struct prox_port_cfg *port = find_reachable_port(targ);
 963         if (port) {
 964                 task->offload_crc = port->capabilities.tx_offload_cksum;
 965         }
 966 }
 967
 968 /* Basic static nat. */
 969 static struct task_init task_init_nat = {
 970         .mode = CGNAT,
 971         .mode_str = "cgnat",
 972         .early_init = early_init_task_nat,
 973         .init = init_task_nat,
 974         .handle = handle_nat_bulk,
 975 #ifdef SOFT_CRC
 976         .flag_features = TASK_FEATURE_TXQ_FLAGS_NOOFFLOADS|TASK_FEATURE_ROUTING|TASK_FEATURE_ZERO_RX,
 977 #else
 978         .flag_features = TASK_FEATURE_ROUTING|TASK_FEATURE_ZERO_RX,
 979 #endif
 980         .size = sizeof(struct task_nat),
 981 };
 982
 983 __attribute__((constructor)) static void reg_task_nat(void)
 984 {
 985         reg_task(&task_init_nat);
 986 }