VNFs/DPPD-PROX/handle_swap.c

   1 /*
   2 // Copyright (c) 2010-2020 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_udp.h>
  19 #include <rte_icmp.h>
  20
  21 #include "task_init.h"
  22 #include "task_base.h"
  23 #include "lconf.h"
  24 #include "log.h"
  25 #include "prox_port_cfg.h"
  26 #include "mpls.h"
  27 #include "qinq.h"
  28 #include "gre.h"
  29 #include "prefetch.h"
  30 #include "defines.h"
  31 #include "igmp.h"
  32 #include "prox_cksum.h"
  33 #include "prox_compat.h"
  34
  35 struct task_swap {
  36         struct task_base base;
  37         struct rte_mempool *igmp_pool;
  38         uint32_t runtime_flags;
  39         uint32_t igmp_address;
  40         uint8_t src_dst_mac[12];
  41         uint32_t local_ipv4;
  42         int offload_crc;
  43         uint64_t last_echo_req_rcvd_tsc;
  44         uint64_t last_echo_rep_rcvd_tsc;
  45         uint32_t n_echo_req;
  46         uint32_t n_echo_rep;
  47 };
  48
  49 #define NB_IGMP_MBUF            1024
  50 #define IGMP_MBUF_SIZE          2048
  51 #define NB_CACHE_IGMP_MBUF      256
  52
  53 static void write_src_and_dst_mac(struct task_swap *task, struct rte_mbuf *mbuf)
  54 {
  55         prox_rte_ether_hdr *hdr;
  56         prox_rte_ether_addr mac;
  57
  58         if (unlikely((task->runtime_flags & (TASK_ARG_DST_MAC_SET|TASK_ARG_SRC_MAC_SET)) == (TASK_ARG_DST_MAC_SET|TASK_ARG_SRC_MAC_SET))) {
  59                 /* Source and Destination mac hardcoded */
  60                 hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
  61                 rte_memcpy(hdr, task->src_dst_mac, sizeof(task->src_dst_mac));
  62         } else {
  63                 hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
  64                 if (likely((task->runtime_flags & TASK_ARG_SRC_MAC_SET) == 0)) {
  65                         /* dst mac will be used as src mac */
  66                         prox_rte_ether_addr_copy(&hdr->d_addr, &mac);
  67                 }
  68
  69                 if (unlikely(task->runtime_flags & TASK_ARG_DST_MAC_SET))
  70                         prox_rte_ether_addr_copy((prox_rte_ether_addr *)&task->src_dst_mac[0], &hdr->d_addr);
  71                 else
  72                         prox_rte_ether_addr_copy(&hdr->s_addr, &hdr->d_addr);
  73
  74                 if (unlikely(task->runtime_flags & TASK_ARG_SRC_MAC_SET)) {
  75                         prox_rte_ether_addr_copy((prox_rte_ether_addr *)&task->src_dst_mac[6], &hdr->s_addr);
  76                 } else {
  77                         prox_rte_ether_addr_copy(&mac, &hdr->s_addr);
  78                 }
  79         }
  80 }
  81 static inline void build_mcast_mac(uint32_t ip, prox_rte_ether_addr *dst_mac)
  82 {
  83         // MAC address is 01:00:5e followed by 23 LSB of IP address
  84         uint64_t mac = 0x0000005e0001L | ((ip & 0xFFFF7F00L) << 16);
  85         memcpy(dst_mac, &mac, sizeof(prox_rte_ether_addr));
  86 }
  87
  88 static inline void build_icmp_reply_message(struct task_base *tbase, struct rte_mbuf *mbuf)
  89 {
  90         struct task_swap *task = (struct task_swap *)tbase;
  91         prox_rte_ether_hdr *hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
  92         prox_rte_ether_addr dst_mac;
  93         prox_rte_ether_addr_copy(&hdr->s_addr, &dst_mac);
  94         prox_rte_ether_addr_copy(&hdr->d_addr, &hdr->s_addr);
  95         prox_rte_ether_addr_copy(&dst_mac, &hdr->d_addr);
  96         prox_rte_ipv4_hdr *ip_hdr = (prox_rte_ipv4_hdr *)(hdr + 1);
  97         ip_hdr->dst_addr = ip_hdr->src_addr;
  98         ip_hdr->src_addr = task->local_ipv4;
  99         prox_rte_icmp_hdr *picmp = (prox_rte_icmp_hdr *)(ip_hdr + 1);
 100         picmp->icmp_type = PROX_RTE_IP_ICMP_ECHO_REPLY;
 101 }
 102
 103 static inline void build_igmp_message(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t ip, uint8_t igmp_message)
 104 {
 105         struct task_swap *task = (struct task_swap *)tbase;
 106         prox_rte_ether_hdr *hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
 107         prox_rte_ether_addr dst_mac;
 108         build_mcast_mac(ip, &dst_mac);
 109
 110         rte_pktmbuf_pkt_len(mbuf) = 46;
 111         rte_pktmbuf_data_len(mbuf) = 46;
 112         init_mbuf_seg(mbuf);
 113
 114         prox_rte_ether_addr_copy(&dst_mac, &hdr->d_addr);
 115         prox_rte_ether_addr_copy((prox_rte_ether_addr *)&task->src_dst_mac[6], &hdr->s_addr);
 116         hdr->ether_type = ETYPE_IPv4;
 117
 118         prox_rte_ipv4_hdr *ip_hdr = (prox_rte_ipv4_hdr *)(hdr + 1);
 119         ip_hdr->version_ihl = 0x45;             /**< version and header length */
 120         ip_hdr->type_of_service = 0;    /**< type of service */
 121         ip_hdr->total_length = rte_cpu_to_be_16(32);            /**< length of packet */
 122         ip_hdr->packet_id = 0;          /**< packet ID */
 123         ip_hdr->fragment_offset = 0;    /**< fragmentation offset */
 124         ip_hdr->time_to_live = 1;               /**< time to live */
 125         ip_hdr->next_proto_id = IPPROTO_IGMP;           /**< protocol ID */
 126         ip_hdr->hdr_checksum = 0;               /**< header checksum */
 127         ip_hdr->src_addr = task->local_ipv4;            /**< source address */
 128         ip_hdr->dst_addr = ip;  /**< destination address */
 129         struct igmpv2_hdr *pigmp = (struct igmpv2_hdr *)(ip_hdr + 1);
 130         pigmp->type = igmp_message;
 131         pigmp->max_resp_time = 0;
 132         pigmp->checksum = 0;
 133         pigmp->group_address = ip;
 134         prox_ip_udp_cksum(mbuf, ip_hdr, sizeof(prox_rte_ether_hdr), sizeof(prox_rte_ipv4_hdr), task->offload_crc);
 135 }
 136
 137 static void stop_swap(struct task_base *tbase)
 138 {
 139         struct task_swap *task = (struct task_swap *)tbase;
 140         if (task->igmp_pool) {
 141                 rte_mempool_free(task->igmp_pool);
 142                 task->igmp_pool = NULL;
 143         }
 144 }
 145
 146 static void handle_ipv6(struct task_swap *task, struct rte_mbuf *mbufs, prox_rte_ipv6_hdr *ipv6_hdr, uint8_t *out)
 147 {
 148         __m128i ip =  _mm_loadu_si128((__m128i*)&(ipv6_hdr->src_addr));
 149         uint16_t port;
 150         uint16_t payload_len;
 151         prox_rte_udp_hdr *udp_hdr;
 152
 153         rte_mov16((uint8_t *)&(ipv6_hdr->src_addr), (uint8_t *)&(ipv6_hdr->dst_addr));  // Copy dst into src
 154         rte_mov16((uint8_t *)&(ipv6_hdr->dst_addr), (uint8_t *)&ip);                    // Copy src into dst
 155         switch(ipv6_hdr->proto) {
 156                 case IPPROTO_TCP:
 157                 case IPPROTO_UDP:
 158                         payload_len = ipv6_hdr->payload_len;
 159                         udp_hdr = (prox_rte_udp_hdr *)(ipv6_hdr + 1);
 160                         if (unlikely(udp_hdr->dgram_len < payload_len)) {
 161                                 plog_warn("Unexpected L4 len (%u) versus L3 payload len (%u) in IPv6 packet\n", udp_hdr->dgram_len, payload_len);
 162                                 *out = OUT_DISCARD;
 163                                 break;
 164                         }
 165                         port = udp_hdr->dst_port;
 166                         udp_hdr->dst_port = udp_hdr->src_port;
 167                         udp_hdr->src_port = port;
 168                         write_src_and_dst_mac(task, mbufs);
 169                         *out = 0;
 170                         break;
 171                 default:
 172                         plog_warn("Unsupported next hop %u in IPv6 packet\n", ipv6_hdr->proto);
 173                         *out = OUT_DISCARD;
 174                         break;
 175         }
 176 }
 177
 178 static int handle_swap_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
 179 {
 180         struct task_swap *task = (struct task_swap *)tbase;
 181         prox_rte_ether_hdr *hdr;
 182         prox_rte_ether_addr mac;
 183         prox_rte_ipv4_hdr *ip_hdr;
 184         prox_rte_udp_hdr *udp_hdr;
 185         prox_rte_ipv6_hdr *ipv6_hdr;
 186         struct gre_hdr *pgre;
 187         prox_rte_ipv4_hdr *inner_ip_hdr;
 188         uint32_t ip;
 189         uint16_t port;
 190         uint8_t out[64] = {0};
 191         struct mpls_hdr *mpls;
 192         uint32_t mpls_len = 0;
 193         struct qinq_hdr *qinq;
 194         prox_rte_vlan_hdr *vlan;
 195         uint16_t j;
 196         struct igmpv2_hdr *pigmp;
 197         prox_rte_icmp_hdr *picmp;
 198         uint8_t type;
 199
 200         for (j = 0; j < n_pkts; ++j) {
 201                 PREFETCH0(mbufs[j]);
 202         }
 203         for (j = 0; j < n_pkts; ++j) {
 204                 PREFETCH0(rte_pktmbuf_mtod(mbufs[j], void *));
 205         }
 206
 207         // TODO 1: check packet is long enough for Ethernet + IP + UDP = 42 bytes
 208         for (uint16_t j = 0; j < n_pkts; ++j) {
 209                 hdr = rte_pktmbuf_mtod(mbufs[j], prox_rte_ether_hdr *);
 210                 switch (hdr->ether_type) {
 211                 case ETYPE_MPLSU:
 212                         mpls = (struct mpls_hdr *)(hdr + 1);
 213                         while (!(mpls->bytes & 0x00010000)) {
 214                                 // TODO: verify pcket length
 215                                 mpls++;
 216                                 mpls_len += sizeof(struct mpls_hdr);
 217                         }
 218                         mpls_len += sizeof(struct mpls_hdr);
 219                         ip_hdr = (prox_rte_ipv4_hdr *)(mpls + 1);
 220                         if (unlikely((ip_hdr->version_ihl >> 4) == 6)) {
 221                                 ipv6_hdr = (prox_rte_ipv6_hdr *)(ip_hdr);
 222                                 handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
 223                                 continue;
 224                         }
 225                         break;
 226                 case ETYPE_8021ad:
 227                         qinq = (struct qinq_hdr *)hdr;
 228                         if (qinq->cvlan.eth_proto != ETYPE_VLAN) {
 229                                 plog_warn("Unexpected proto in QinQ = %#04x\n", qinq->cvlan.eth_proto);
 230                                 out[j] = OUT_DISCARD;
 231                                 continue;
 232                         }
 233                         if (qinq->ether_type == ETYPE_IPv4) {
 234                                 ip_hdr = (prox_rte_ipv4_hdr *)(qinq + 1);
 235                         } else if (qinq->ether_type == ETYPE_IPv6) {
 236                                 ipv6_hdr = (prox_rte_ipv6_hdr *)(qinq + 1);
 237                                 handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
 238                                 continue;
 239                         } else {
 240                                 plog_warn("Unsupported packet type\n");
 241                                 out[j] = OUT_DISCARD;
 242                                 continue;
 243                         }
 244                         break;
 245                 case ETYPE_VLAN:
 246                         vlan = (prox_rte_vlan_hdr *)(hdr + 1);
 247                         if (vlan->eth_proto == ETYPE_IPv4) {
 248                                 ip_hdr = (prox_rte_ipv4_hdr *)(vlan + 1);
 249                         } else if (vlan->eth_proto == ETYPE_IPv6) {
 250                                 ipv6_hdr = (prox_rte_ipv6_hdr *)(vlan + 1);
 251                                 handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
 252                                 continue;
 253                         } else if (vlan->eth_proto == ETYPE_VLAN) {
 254                                 vlan = (prox_rte_vlan_hdr *)(vlan + 1);
 255                                 if (vlan->eth_proto == ETYPE_IPv4) {
 256                                         ip_hdr = (prox_rte_ipv4_hdr *)(vlan + 1);
 257                                 }
 258                                 else if (vlan->eth_proto == ETYPE_IPv6) {
 259                                         ipv6_hdr = (prox_rte_ipv6_hdr *)(vlan + 1);
 260                                         handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
 261                                         continue;
 262                                 }
 263                                 else {
 264                                         plog_warn("Unsupported packet type\n");
 265                                         out[j] = OUT_DISCARD;
 266                                         continue;
 267                                 }
 268                         } else {
 269                                 plog_warn("Unsupported packet type\n");
 270                                 out[j] = OUT_DISCARD;
 271                                 continue;
 272                         }
 273                         break;
 274                 case ETYPE_IPv4:
 275                         ip_hdr = (prox_rte_ipv4_hdr *)(hdr + 1);
 276                         break;
 277                 case ETYPE_IPv6:
 278                         ipv6_hdr = (prox_rte_ipv6_hdr *)(hdr + 1);
 279                         handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
 280                         continue;
 281                 case ETYPE_LLDP:
 282                         out[j] = OUT_DISCARD;
 283                         continue;
 284                 default:
 285                         plog_warn("Unsupported ether_type 0x%x\n", hdr->ether_type);
 286                         out[j] = OUT_DISCARD;
 287                         continue;
 288                 }
 289                 // TODO 2 : check packet is long enough for Ethernet + IP + UDP + extra header (VLAN, MPLS, ...)
 290                 // IPv4 packet
 291
 292                 ip = ip_hdr->dst_addr;
 293                 if (unlikely((ip_hdr->version_ihl >> 4) != 4)) {
 294                         out[j] = OUT_DISCARD;
 295                         continue;
 296                 }
 297
 298                 switch (ip_hdr->next_proto_id) {
 299                 case IPPROTO_GRE:
 300                         ip_hdr->dst_addr = ip_hdr->src_addr;
 301                         ip_hdr->src_addr = ip;
 302
 303                         pgre = (struct gre_hdr *)(ip_hdr + 1);
 304                         inner_ip_hdr = ((prox_rte_ipv4_hdr *)(pgre + 1));
 305                         ip = inner_ip_hdr->dst_addr;
 306                         inner_ip_hdr->dst_addr = inner_ip_hdr->src_addr;
 307                         inner_ip_hdr->src_addr = ip;
 308
 309                         udp_hdr = (prox_rte_udp_hdr *)(inner_ip_hdr + 1);
 310                         // TODO 3.1 : verify proto is UPD or TCP
 311                         port = udp_hdr->dst_port;
 312                         udp_hdr->dst_port = udp_hdr->src_port;
 313                         udp_hdr->src_port = port;
 314                         write_src_and_dst_mac(task, mbufs[j]);
 315                         break;
 316                 case IPPROTO_UDP:
 317                 case IPPROTO_TCP:
 318                         if (unlikely(task->igmp_address && PROX_RTE_IS_IPV4_MCAST(rte_be_to_cpu_32(ip)))) {
 319                                 out[j] = OUT_DISCARD;
 320                                 continue;
 321                         }
 322                         udp_hdr = (prox_rte_udp_hdr *)(ip_hdr + 1);
 323                         ip_hdr->dst_addr = ip_hdr->src_addr;
 324                         ip_hdr->src_addr = ip;
 325
 326                         port = udp_hdr->dst_port;
 327                         udp_hdr->dst_port = udp_hdr->src_port;
 328                         udp_hdr->src_port = port;
 329                         write_src_and_dst_mac(task, mbufs[j]);
 330                         break;
 331                 case IPPROTO_ICMP:
 332                         picmp = (prox_rte_icmp_hdr *)(ip_hdr + 1);
 333                         type = picmp->icmp_type;
 334                         if (type == PROX_RTE_IP_ICMP_ECHO_REQUEST) {
 335                                 if (ip_hdr->dst_addr == task->local_ipv4) {
 336                                         task->n_echo_req++;
 337                                         if (rte_rdtsc() - task->last_echo_req_rcvd_tsc > rte_get_tsc_hz()) {
 338                                                 plog_info("Received %u Echo Request on IP "IPv4_BYTES_FMT" (last received from IP "IPv4_BYTES_FMT")\n", task->n_echo_req, IPv4_BYTES(((uint8_t*)&ip_hdr->dst_addr)), IPv4_BYTES(((uint8_t*)&ip_hdr->src_addr)));
 339                                                 task->n_echo_req = 0;
 340                                                 task->last_echo_req_rcvd_tsc = rte_rdtsc();
 341                                         }
 342                                         build_icmp_reply_message(tbase, mbufs[j]);
 343                                 } else {
 344                                         out[j] = OUT_DISCARD;
 345                                         continue;
 346                                 }
 347                         } else if (type == PROX_RTE_IP_ICMP_ECHO_REPLY) {
 348                                 if (ip_hdr->dst_addr == task->local_ipv4) {
 349                                         task->n_echo_rep++;
 350                                         if (rte_rdtsc() - task->last_echo_rep_rcvd_tsc > rte_get_tsc_hz()) {
 351                                                 plog_info("Received %u Echo Reply on IP "IPv4_BYTES_FMT" (last received from IP "IPv4_BYTES_FMT")\n", task->n_echo_rep, IPv4_BYTES(((uint8_t*)&ip_hdr->dst_addr)), IPv4_BYTES(((uint8_t*)&ip_hdr->src_addr)));
 352                                                 task->n_echo_rep = 0;
 353                                                 task->last_echo_rep_rcvd_tsc = rte_rdtsc();
 354                                         }
 355                                 } else {
 356                                         out[j] = OUT_DISCARD;
 357                                         continue;
 358                                 }
 359                         } else {
 360                                 out[j] = OUT_DISCARD;
 361                                 continue;
 362                         }
 363                         break;
 364                 case IPPROTO_IGMP:
 365                         pigmp = (struct igmpv2_hdr *)(ip_hdr + 1);
 366                         // TODO: check packet len
 367                         type = pigmp->type;
 368                         if (type == IGMP_MEMBERSHIP_QUERY) {
 369                                 if (task->igmp_address) {
 370                                         // We have an address registered
 371                                         if ((task->igmp_address == pigmp->group_address) || (pigmp->group_address == 0)) {
 372                                                 // We get a request for the registered address, or to 0.0.0.0
 373                                                 build_igmp_message(tbase, mbufs[j], task->igmp_address, IGMP_MEMBERSHIP_REPORT);        // replace Membership query packet with a response
 374                                         } else {
 375                                                 // Discard as either we are not registered or this is a query for a different group
 376                                                 out[j] = OUT_DISCARD;
 377                                                 continue;
 378                                         }
 379                                 } else {
 380                                         // Discard as either we are not registered
 381                                         out[j] = OUT_DISCARD;
 382                                         continue;
 383                                 }
 384                         } else {
 385                                 // Do not forward other IGMP packets back
 386                                 out[j] = OUT_DISCARD;
 387                                 continue;
 388                         }
 389                         break;
 390                 default:
 391                         plog_warn("Unsupported IP protocol 0x%x\n", ip_hdr->next_proto_id);
 392                         out[j] = OUT_DISCARD;
 393                         continue;
 394                 }
 395         }
 396         return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
 397 }
 398
 399 void igmp_join_group(struct task_base *tbase, uint32_t igmp_address)
 400 {
 401         struct task_swap *task = (struct task_swap *)tbase;
 402         struct rte_mbuf *igmp_mbuf;
 403         uint8_t out[64] = {0};
 404         int ret;
 405
 406         task->igmp_address = igmp_address;
 407         ret = rte_mempool_get(task->igmp_pool, (void **)&igmp_mbuf);
 408         if (ret != 0) {
 409                 plog_err("Unable to allocate igmp mbuf\n");
 410                 return;
 411         }
 412         build_igmp_message(tbase, igmp_mbuf, task->igmp_address, IGMP_MEMBERSHIP_REPORT);
 413         task->base.tx_pkt(&task->base, &igmp_mbuf, 1, out);
 414 }
 415
 416 void igmp_leave_group(struct task_base *tbase)
 417 {
 418         struct task_swap *task = (struct task_swap *)tbase;
 419         struct rte_mbuf *igmp_mbuf;
 420         uint8_t out[64] = {0};
 421         int ret;
 422
 423         task->igmp_address = 0;
 424         ret = rte_mempool_get(task->igmp_pool, (void **)&igmp_mbuf);
 425         if (ret != 0) {
 426                 plog_err("Unable to allocate igmp mbuf\n");
 427                 return;
 428         }
 429         build_igmp_message(tbase, igmp_mbuf, task->igmp_address, IGMP_LEAVE_GROUP);
 430         task->base.tx_pkt(&task->base, &igmp_mbuf, 1, out);
 431 }
 432
 433 static void init_task_swap(struct task_base *tbase, struct task_args *targ)
 434 {
 435         struct task_swap *task = (struct task_swap *)tbase;
 436         prox_rte_ether_addr *src_addr, *dst_addr;
 437
 438         /*
 439          * The destination MAC of the outgoing packet is based on the config file:
 440          *    - 'dst mac=xx:xx:xx:xx:xx:xx' => the pre-configured mac will be used as dst mac
 441          *    - 'dst mac=packet'            => the src mac of the incoming packet is used as dst mac
 442          *    - (default - no 'dst mac')    => the src mac from the incoming packet is used as dst mac
 443          *
 444          * The source MAC of the outgoing packet is based on the config file:
 445          *    - 'src mac=xx:xx:xx:xx:xx:xx' => the pre-configured mac will be used as src mac
 446          *    - 'src mac=packet'            => the dst mac of the incoming packet is used as src mac
 447          *    - 'src mac=hw'                => the mac address of the tx port is used as src mac
 448          *                                     An error is returned if there are no physical tx ports
 449          *    - (default - no 'src mac')    => if there is physical tx port, the mac of that port is used as src mac
 450          *    - (default - no 'src mac')       if there are no physical tx ports the dst mac of the incoming packet
 451          */
 452
 453         if (targ->flags & TASK_ARG_DST_MAC_SET) {
 454                 dst_addr = &targ->edaddr;
 455                 memcpy(&task->src_dst_mac[0], dst_addr, sizeof(*src_addr));
 456         }
 457
 458         PROX_PANIC(targ->flags & TASK_ARG_DO_NOT_SET_SRC_MAC, "src mac must be set in swap mode, by definition => src mac=no is not supported\n");
 459         PROX_PANIC(targ->flags & TASK_ARG_DO_NOT_SET_DST_MAC, "dst mac must be set in swap mode, by definition => dst mac=no is not supported\n");
 460
 461         if (targ->flags & TASK_ARG_SRC_MAC_SET) {
 462                 src_addr =  &targ->esaddr;
 463                 memcpy(&task->src_dst_mac[6], src_addr, sizeof(*dst_addr));
 464                 plog_info("\t\tCore %d: src mac set from config file\n", targ->lconf->id);
 465         } else {
 466                 if (targ->flags & TASK_ARG_HW_SRC_MAC)
 467                         PROX_PANIC(targ->nb_txports == 0, "src mac set to hw but no tx port\n");
 468                 if (targ->nb_txports) {
 469                         src_addr = &prox_port_cfg[task->base.tx_params_hw.tx_port_queue[0].port].eth_addr;
 470                         memcpy(&task->src_dst_mac[6], src_addr, sizeof(*dst_addr));
 471                         targ->flags |= TASK_ARG_SRC_MAC_SET;
 472                         plog_info("\t\tCore %d: src mac set from port\n", targ->lconf->id);
 473                 }
 474         }
 475         task->runtime_flags = targ->flags;
 476         task->igmp_address =  rte_cpu_to_be_32(targ->igmp_address);
 477         if (task->igmp_pool == NULL) {
 478                 static char name[] = "igmp0_pool";
 479                 name[4]++;
 480                 struct rte_mempool *ret = rte_mempool_create(name, NB_IGMP_MBUF, IGMP_MBUF_SIZE, NB_CACHE_IGMP_MBUF,
 481                         sizeof(struct rte_pktmbuf_pool_private), rte_pktmbuf_pool_init, NULL, rte_pktmbuf_init, 0,
 482                         rte_socket_id(), 0);
 483                 PROX_PANIC(ret == NULL, "Failed to allocate IGMP memory pool on socket %u with %u elements\n",
 484                         rte_socket_id(), NB_IGMP_MBUF);
 485                 plog_info("\t\tMempool %p (%s) size = %u * %u cache %u, socket %d\n", ret, name, NB_IGMP_MBUF,
 486                         IGMP_MBUF_SIZE, NB_CACHE_IGMP_MBUF, rte_socket_id());
 487                 task->igmp_pool = ret;
 488         }
 489         task->local_ipv4 = rte_cpu_to_be_32(targ->local_ipv4);
 490
 491         struct prox_port_cfg *port = find_reachable_port(targ);
 492         if (port) {
 493                 task->offload_crc = port->requested_tx_offload & (DEV_TX_OFFLOAD_IPV4_CKSUM | DEV_TX_OFFLOAD_UDP_CKSUM);
 494         }
 495 }
 496
 497 static struct task_init task_init_swap = {
 498         .mode_str = "swap",
 499         .init = init_task_swap,
 500         .handle = handle_swap_bulk,
 501         .flag_features = 0,
 502         .size = sizeof(struct task_swap),
 503         .stop_last = stop_swap
 504 };
 505
 506 __attribute__((constructor)) static void reg_task_swap(void)
 507 {
 508         reg_task(&task_init_swap);
 509 }