summaryrefslogtreecommitdiffstats
path: root/VNFs/DPPD-PROX/handle_swap.c
blob: 094199e4b2bae7198fbbc925c640151fec40e7f9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
/*
// Copyright (c) 2010-2020 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/

#include <rte_mbuf.h>
#include <rte_udp.h>
#include <rte_icmp.h>

#include "task_init.h"
#include "task_base.h"
#include "lconf.h"
#include "log.h"
#include "prox_port_cfg.h"
#include "mpls.h"
#include "qinq.h"
#include "gre.h"
#include "prefetch.h"
#include "defines.h"
#include "igmp.h"
#include "prox_cksum.h"
#include "prox_compat.h"

struct task_swap {
	struct task_base base;
	struct rte_mempool *igmp_pool;
	uint32_t runtime_flags;
	uint32_t igmp_address;
	uint8_t src_dst_mac[12];
	uint32_t local_ipv4;
	int offload_crc;
	uint64_t last_echo_req_rcvd_tsc;
	uint64_t last_echo_rep_rcvd_tsc;
	uint32_t n_echo_req;
	uint32_t n_echo_rep;
};

#define NB_IGMP_MBUF  		1024
#define IGMP_MBUF_SIZE 		2048
#define NB_CACHE_IGMP_MBUF  	256

static void write_src_and_dst_mac(struct task_swap *task, struct rte_mbuf *mbuf)
{
	prox_rte_ether_hdr *hdr;
	prox_rte_ether_addr mac;

	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))) {
		/* Source and Destination mac hardcoded */
		hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
              	rte_memcpy(hdr, task->src_dst_mac, sizeof(task->src_dst_mac));
	} else {
		hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
		if (unlikely((task->runtime_flags & TASK_ARG_SRC_MAC_SET) == 0)) {
			/* dst mac will be used as src mac */
			prox_rte_ether_addr_copy(&hdr->d_addr, &mac);
		}

		if (unlikely(task->runtime_flags & TASK_ARG_DST_MAC_SET))
			prox_rte_ether_addr_copy((prox_rte_ether_addr *)&task->src_dst_mac[0], &hdr->d_addr);
		else
			prox_rte_ether_addr_copy(&hdr->s_addr, &hdr->d_addr);

		if (likely(task->runtime_flags & TASK_ARG_SRC_MAC_SET)) {
			prox_rte_ether_addr_copy((prox_rte_ether_addr *)&task->src_dst_mac[6], &hdr->s_addr);
		} else {
			prox_rte_ether_addr_copy(&mac, &hdr->s_addr);
		}
	}
}
static inline void build_mcast_mac(uint32_t ip, prox_rte_ether_addr *dst_mac)
{
	// MAC address is 01:00:5e followed by 23 LSB of IP address
	uint64_t mac = 0x0000005e0001L | ((ip & 0xFFFF7F00L) << 16);
	memcpy(dst_mac, &mac, sizeof(prox_rte_ether_addr));
}

static inline void build_icmp_reply_message(struct task_base *tbase, struct rte_mbuf *mbuf)
{
	struct task_swap *task = (struct task_swap *)tbase;
	prox_rte_ether_hdr *hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
	prox_rte_ether_addr dst_mac;
	prox_rte_ether_addr_copy(&hdr->s_addr, &dst_mac);
	prox_rte_ether_addr_copy(&hdr->d_addr, &hdr->s_addr);
	prox_rte_ether_addr_copy(&dst_mac, &hdr->d_addr);
	prox_rte_ipv4_hdr *ip_hdr = (prox_rte_ipv4_hdr *)(hdr + 1);
	ip_hdr->dst_addr = ip_hdr->src_addr;
	ip_hdr->src_addr = task->local_ipv4;
	prox_rte_icmp_hdr *picmp = (prox_rte_icmp_hdr *)(ip_hdr + 1);
	picmp->icmp_type = PROX_RTE_IP_ICMP_ECHO_REPLY;
}

static inline void build_igmp_message(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t ip, uint8_t igmp_message)
{
	struct task_swap *task = (struct task_swap *)tbase;
	prox_rte_ether_hdr *hdr = rte_pktmbuf_mtod(mbuf, prox_rte_ether_hdr *);
	prox_rte_ether_addr dst_mac;
	build_mcast_mac(ip, &dst_mac);

        rte_pktmbuf_pkt_len(mbuf) = 46;
        rte_pktmbuf_data_len(mbuf) = 46;
        init_mbuf_seg(mbuf);

        prox_rte_ether_addr_copy(&dst_mac, &hdr->d_addr);
	prox_rte_ether_addr_copy((prox_rte_ether_addr *)&task->src_dst_mac[6], &hdr->s_addr);
	hdr->ether_type = ETYPE_IPv4;

	prox_rte_ipv4_hdr *ip_hdr = (prox_rte_ipv4_hdr *)(hdr + 1);
	ip_hdr->version_ihl = 0x45;		/**< version and header length */
	ip_hdr->type_of_service = 0;	/**< type of service */
	ip_hdr->total_length = rte_cpu_to_be_16(32);		/**< length of packet */
	ip_hdr->packet_id = 0;		/**< packet ID */
	ip_hdr->fragment_offset = 0;	/**< fragmentation offset */
	ip_hdr->time_to_live = 1;		/**< time to live */
	ip_hdr->next_proto_id = IPPROTO_IGMP;		/**< protocol ID */
	ip_hdr->hdr_checksum = 0;		/**< header checksum */
	ip_hdr->src_addr = task->local_ipv4;		/**< source address */
	ip_hdr->dst_addr = ip;	/**< destination address */
	struct igmpv2_hdr *pigmp = (struct igmpv2_hdr *)(ip_hdr + 1);
	pigmp->type = igmp_message;
	pigmp->max_resp_time = 0;
	pigmp->checksum = 0;
	pigmp->group_address = ip;
	prox_ip_udp_cksum(mbuf, ip_hdr, sizeof(prox_rte_ether_hdr), sizeof(prox_rte_ipv4_hdr), task->offload_crc);
}

static void stop_swap(struct task_base *tbase)
{
	struct task_swap *task = (struct task_swap *)tbase;
	if (task->igmp_pool) {
		rte_mempool_free(task->igmp_pool);
		task->igmp_pool = NULL;
	}
}

static void handle_ipv6(struct task_swap *task, struct rte_mbuf *mbufs, prox_rte_ipv6_hdr *ipv6_hdr, uint8_t *out)
{
	__m128i ip =  _mm_loadu_si128((__m128i*)&(ipv6_hdr->src_addr));
	uint16_t port;
	uint16_t payload_len;
	prox_rte_udp_hdr *udp_hdr;

	rte_mov16((uint8_t *)&(ipv6_hdr->src_addr), (uint8_t *)&(ipv6_hdr->dst_addr));	// Copy dst into src
	rte_mov16((uint8_t *)&(ipv6_hdr->dst_addr), (uint8_t *)&ip);			// Copy src into dst
	switch(ipv6_hdr->proto) {
		case IPPROTO_TCP:
		case IPPROTO_UDP:
			payload_len = ipv6_hdr->payload_len;
			udp_hdr = (prox_rte_udp_hdr *)(ipv6_hdr + 1);
			if (unlikely(udp_hdr->dgram_len < payload_len)) {
				plog_warn("Unexpected L4 len (%u) versus L3 payload len (%u) in IPv6 packet\n", udp_hdr->dgram_len, payload_len);
				*out = OUT_DISCARD;
				break;
			}
			port = udp_hdr->dst_port;
			udp_hdr->dst_port = udp_hdr->src_port;
			udp_hdr->src_port = port;
			write_src_and_dst_mac(task, mbufs);
			*out = 0;
			break;
		default:
			plog_warn("Unsupported next hop %u in IPv6 packet\n", ipv6_hdr->proto);
			*out = OUT_DISCARD;
			break;
	}
}

static int handle_swap_bulk(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts)
{
	struct task_swap *task = (struct task_swap *)tbase;
	prox_rte_ether_hdr *hdr;
	prox_rte_ether_addr mac;
	prox_rte_ipv4_hdr *ip_hdr;
	prox_rte_udp_hdr *udp_hdr;
	prox_rte_ipv6_hdr *ipv6_hdr;
	struct gre_hdr *pgre;
	prox_rte_ipv4_hdr *inner_ip_hdr;
	uint32_t ip;
	uint16_t port;
	uint8_t out[64] = {0};
	struct mpls_hdr *mpls;
	uint32_t mpls_len = 0;
	struct qinq_hdr *qinq;
	prox_rte_vlan_hdr *vlan;
	uint16_t j;
	struct igmpv2_hdr *pigmp;
	prox_rte_icmp_hdr *picmp;
	uint8_t type;

	for (j = 0; j < n_pkts; ++j) {
		PREFETCH0(mbufs[j]);
	}
	for (j = 0; j < n_pkts; ++j) {
		PREFETCH0(rte_pktmbuf_mtod(mbufs[j], void *));
	}

	// TODO 1: check packet is long enough for Ethernet + IP + UDP = 42 bytes
	for (uint16_t j = 0; j < n_pkts; ++j) {
		hdr = rte_pktmbuf_mtod(mbufs[j], prox_rte_ether_hdr *);
		switch (hdr->ether_type) {
		case ETYPE_MPLSU:
			mpls = (struct mpls_hdr *)(hdr + 1);
			while (!(mpls->bytes & 0x00010000)) {
				// TODO: verify pcket length
				mpls++;
				mpls_len += sizeof(struct mpls_hdr);
			}
			mpls_len += sizeof(struct mpls_hdr);
			ip_hdr = (prox_rte_ipv4_hdr *)(mpls + 1);
			if (unlikely((ip_hdr->version_ihl >> 4) == 6)) {
				ipv6_hdr = (prox_rte_ipv6_hdr *)(ip_hdr);
				handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
				continue;
			}
			break;
		case ETYPE_8021ad:
			qinq = (struct qinq_hdr *)hdr;
			if (qinq->cvlan.eth_proto != ETYPE_VLAN) {
				plog_warn("Unexpected proto in QinQ = %#04x\n", qinq->cvlan.eth_proto);
				out[j] = OUT_DISCARD;
				continue;
			}
			if (qinq->ether_type == ETYPE_IPv4) {
				ip_hdr = (prox_rte_ipv4_hdr *)(qinq + 1);
			} else if (qinq->ether_type == ETYPE_IPv6) {
				ipv6_hdr = (prox_rte_ipv6_hdr *)(qinq + 1);
				handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
				continue;
			} else {
				plog_warn("Unsupported packet type\n");
				out[j] = OUT_DISCARD;
				continue;
			}
			break;
		case ETYPE_VLAN:
			vlan = (prox_rte_vlan_hdr *)(hdr + 1);
			if (vlan->eth_proto == ETYPE_IPv4) {
				ip_hdr = (prox_rte_ipv4_hdr *)(vlan + 1);
			} else if (vlan->eth_proto == ETYPE_IPv6) {
				ipv6_hdr = (prox_rte_ipv6_hdr *)(vlan + 1);
				handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
				continue;
			} else if (vlan->eth_proto == ETYPE_VLAN) {
				vlan = (prox_rte_vlan_hdr *)(vlan + 1);
				if (vlan->eth_proto == ETYPE_IPv4) {
					ip_hdr = (prox_rte_ipv4_hdr *)(vlan + 1);
				}
				else if (vlan->eth_proto == ETYPE_IPv6) {
					ipv6_hdr = (prox_rte_ipv6_hdr *)(vlan + 1);
					handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
					continue;
				}
				else {
					plog_warn("Unsupported packet type\n");
					out[j] = OUT_DISCARD;
					continue;
				}
			} else {
				plog_warn("Unsupported packet type\n");
				out[j] = OUT_DISCARD;
				continue;
			}
			break;
		case ETYPE_IPv4:
			ip_hdr = (prox_rte_ipv4_hdr *)(hdr + 1);
			break;
		case ETYPE_IPv6:
			ipv6_hdr = (prox_rte_ipv6_hdr *)(hdr + 1);
			handle_ipv6(task, mbufs[j], ipv6_hdr, &out[j]);
			continue;
		case ETYPE_LLDP:
			out[j] = OUT_DISCARD;
			continue;
		default:
			plog_warn("Unsupported ether_type 0x%x\n", hdr->ether_type);
			out[j] = OUT_DISCARD;
			continue;
		}
		// TODO 2 : check packet is long enough for Ethernet + IP + UDP + extra header (VLAN, MPLS, ...)
		// IPv4 packet

		ip = ip_hdr->dst_addr;
		if (unlikely((ip_hdr->version_ihl >> 4) != 4)) {
			out[j] = OUT_DISCARD;
			continue;
		}

		switch (ip_hdr->next_proto_id) {
		case IPPROTO_GRE:
			ip_hdr->dst_addr = ip_hdr->src_addr;
			ip_hdr->src_addr = ip;

			pgre = (struct gre_hdr *)(ip_hdr + 1);
			inner_ip_hdr = ((prox_rte_ipv4_hdr *)(pgre + 1));
			ip = inner_ip_hdr->dst_addr;
			inner_ip_hdr->dst_addr = inner_ip_hdr->src_addr;
			inner_ip_hdr->src_addr = ip;

			udp_hdr = (prox_rte_udp_hdr *)(inner_ip_hdr + 1);
			// TODO 3.1 : verify proto is UPD or TCP
			port = udp_hdr->dst_port;
			udp_hdr->dst_port = udp_hdr->src_port;
			udp_hdr->src_port = port;
			write_src_and_dst_mac(task, mbufs[j]);
			break;
		case IPPROTO_UDP:
		case IPPROTO_TCP:
			if (unlikely(task->igmp_address && PROX_RTE_IS_IPV4_MCAST(rte_be_to_cpu_32(ip)))) {
				out[j] = OUT_DISCARD;
				continue;
			}
			udp_hdr = (prox_rte_udp_hdr *)(ip_hdr + 1);
			ip_hdr->dst_addr = ip_hdr->src_addr;
			ip_hdr->src_addr = ip;

			port = udp_hdr->dst_port;
			udp_hdr->dst_port = udp_hdr->src_port;
			udp_hdr->src_port = port;
			write_src_and_dst_mac(task, mbufs[j]);
			break;
		case IPPROTO_ICMP:
			picmp = (prox_rte_icmp_hdr *)(ip_hdr + 1);
			type = picmp->icmp_type;
			if (type == PROX_RTE_IP_ICMP_ECHO_REQUEST) {
				if (ip_hdr->dst_addr == task->local_ipv4) {
					task->n_echo_req++;
					if (rte_rdtsc() - task->last_echo_req_rcvd_tsc > rte_get_tsc_hz()) {
						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)));
						task->n_echo_req = 0;
						task->last_echo_req_rcvd_tsc = rte_rdtsc();
					}
					build_icmp_reply_message(tbase, mbufs[j]);
				} else {
					out[j] = OUT_DISCARD;
					continue;
				}
			} else if (type == PROX_RTE_IP_ICMP_ECHO_REPLY) {
				if (ip_hdr->dst_addr == task->local_ipv4) {
					task->n_echo_rep++;
					if (rte_rdtsc() - task->last_echo_rep_rcvd_tsc > rte_get_tsc_hz()) {
						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)));
						task->n_echo_rep = 0;
						task->last_echo_rep_rcvd_tsc = rte_rdtsc();
					}
				} else {
					out[j] = OUT_DISCARD;
					continue;
				}
			} else {
				out[j] = OUT_DISCARD;
				continue;
			}
			break;
		case IPPROTO_IGMP:
			pigmp = (struct igmpv2_hdr *)(ip_hdr + 1);
			// TODO: check packet len
			type = pigmp->type;
			if (type == IGMP_MEMBERSHIP_QUERY) {
				if (task->igmp_address) {
					// We have an address registered
					if ((task->igmp_address == pigmp->group_address) || (pigmp->group_address == 0)) {
						// We get a request for the registered address, or to 0.0.0.0
						build_igmp_message(tbase, mbufs[j], task->igmp_address, IGMP_MEMBERSHIP_REPORT);	// replace Membership query packet with a response
					} else {
						// Discard as either we are not registered or this is a query for a different group
						out[j] = OUT_DISCARD;
						continue;
					}
				} else {
					// Discard as either we are not registered
					out[j] = OUT_DISCARD;
					continue;
				}
			} else {
				// Do not forward other IGMP packets back
				out[j] = OUT_DISCARD;
				continue;
			}
			break;
		default:
			plog_warn("Unsupported IP protocol 0x%x\n", ip_hdr->next_proto_id);
			out[j] = OUT_DISCARD;
			continue;
		}
	}
	return task->base.tx_pkt(&task->base, mbufs, n_pkts, out);
}

void igmp_join_group(struct task_base *tbase, uint32_t igmp_address)
{
	struct task_swap *task = (struct task_swap *)tbase;
	struct rte_mbuf *igmp_mbuf;
	uint8_t out[64] = {0};
	int ret;

	task->igmp_address = igmp_address;
	ret = rte_mempool_get(task->igmp_pool, (void **)&igmp_mbuf);
	if (ret != 0) {
		plog_err("Unable to allocate igmp mbuf\n");
		return;
	}
	build_igmp_message(tbase, igmp_mbuf, task->igmp_address, IGMP_MEMBERSHIP_REPORT);
	task->base.tx_pkt(&task->base, &igmp_mbuf, 1, out);
}

void igmp_leave_group(struct task_base *tbase)
{
	struct task_swap *task = (struct task_swap *)tbase;
	struct rte_mbuf *igmp_mbuf;
	uint8_t out[64] = {0};
	int ret;

	task->igmp_address = 0;
	ret = rte_mempool_get(task->igmp_pool, (void **)&igmp_mbuf);
	if (ret != 0) {
		plog_err("Unable to allocate igmp mbuf\n");
		return;
	}
	build_igmp_message(tbase, igmp_mbuf, task->igmp_address, IGMP_LEAVE_GROUP);
	task->base.tx_pkt(&task->base, &igmp_mbuf, 1, out);
}

static void init_task_swap(struct task_base *tbase, struct task_args *targ)
{
	struct task_swap *task = (struct task_swap *)tbase;
	prox_rte_ether_addr *src_addr, *dst_addr;

	/*
	 * The destination MAC of the outgoing packet is based on the config file:
	 *    - 'dst mac=xx:xx:xx:xx:xx:xx' => the pre-configured mac will be used as dst mac
	 *    - 'dst mac=packet'            => the src mac of the incoming packet is used as dst mac
	 *    - (default - no 'dst mac')    => the src mac from the incoming packet is used as dst mac
	 *
	 * The source MAC of the outgoing packet is based on the config file:
	 *    - 'src mac=xx:xx:xx:xx:xx:xx' => the pre-configured mac will be used as src mac
	 *    - 'src mac=packet'            => the dst mac of the incoming packet is used as src mac
	 *    - 'src mac=hw'                => the mac address of the tx port is used as src mac
	 *                                     An error is returned if there are no physical tx ports
	 *    - (default - no 'src mac')    => if there is physical tx port, the mac of that port is used as src mac
	 *    - (default - no 'src mac')       if there are no physical tx ports the dst mac of the incoming packet
	 */

	if (targ->flags & TASK_ARG_DST_MAC_SET) {
		dst_addr = &targ->edaddr;
		memcpy(&task->src_dst_mac[0], dst_addr, sizeof(*src_addr));
	}

	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");
	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");

	if (targ->flags & TASK_ARG_SRC_MAC_SET) {
		src_addr =  &targ->esaddr;
		memcpy(&task->src_dst_mac[6], src_addr, sizeof(*dst_addr));
		plog_info("\t\tCore %d: src mac set from config file\n", targ->lconf->id);
	} else {
		if (targ->flags & TASK_ARG_HW_SRC_MAC)
			PROX_PANIC(targ->nb_txports == 0, "src mac set to hw but no tx port\n");
		if (targ->nb_txports) {
			src_addr = &prox_port_cfg[task->base.tx_params_hw.tx_port_queue[0].port].eth_addr;
			memcpy(&task->src_dst_mac[6], src_addr, sizeof(*dst_addr));
			targ->flags |= TASK_ARG_SRC_MAC_SET;
			plog_info("\t\tCore %d: src mac set from port\n", targ->lconf->id);
		}
	}
	task->runtime_flags = targ->flags;
	task->igmp_address =  rte_cpu_to_be_32(targ->igmp_address);
	if (task->igmp_pool == NULL) {
		static char name[] = "igmp0_pool";
		name[4]++;
		struct rte_mempool *ret = rte_mempool_create(name, NB_IGMP_MBUF, IGMP_MBUF_SIZE, NB_CACHE_IGMP_MBUF,
			sizeof(struct rte_pktmbuf_pool_private), rte_pktmbuf_pool_init, NULL, rte_pktmbuf_init, 0,
			rte_socket_id(), 0);
		PROX_PANIC(ret == NULL, "Failed to allocate IGMP memory pool on socket %u with %u elements\n",
			rte_socket_id(), NB_IGMP_MBUF);
		plog_info("\t\tMempool %p (%s) size = %u * %u cache %u, socket %d\n", ret, name, NB_IGMP_MBUF,
			IGMP_MBUF_SIZE, NB_CACHE_IGMP_MBUF, rte_socket_id());
		task->igmp_pool = ret;
	}
	task->local_ipv4 = rte_cpu_to_be_32(targ->local_ipv4);

	struct prox_port_cfg *port = find_reachable_port(targ);
	if (port) {
		task->offload_crc = port->requested_tx_offload & (DEV_TX_OFFLOAD_IPV4_CKSUM | DEV_TX_OFFLOAD_UDP_CKSUM);
	}
}

static struct task_init task_init_swap = {
	.mode_str = "swap",
	.init = init_task_swap,
	.handle = handle_swap_bulk,
	.flag_features = 0,
	.size = sizeof(struct task_swap),
	.stop_last = stop_swap
};

__attribute__((constructor)) static void reg_task_swap(void)
{
	reg_task(&task_init_swap);
}