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Linux 4.19.133
[linux/fpc-iii.git] / tools / testing / selftests / net / msg_zerocopy.c
blob406cc70c571dea0c1bfef19165e8cfa251a2cf39
1 /* Evaluate MSG_ZEROCOPY
2 *
3 * Send traffic between two processes over one of the supported
4 * protocols and modes:
5 *
6 * PF_INET/PF_INET6
7 * - SOCK_STREAM
8 * - SOCK_DGRAM
9 * - SOCK_DGRAM with UDP_CORK
10 * - SOCK_RAW
11 * - SOCK_RAW with IP_HDRINCL
12 *
13 * PF_PACKET
14 * - SOCK_DGRAM
15 * - SOCK_RAW
16 *
17 * PF_RDS
18 * - SOCK_SEQPACKET
19 *
20 * Start this program on two connected hosts, one in send mode and
21 * the other with option '-r' to put it in receiver mode.
22 *
23 * If zerocopy mode ('-z') is enabled, the sender will verify that
24 * the kernel queues completions on the error queue for all zerocopy
25 * transfers.
26 */
27
28 #define _GNU_SOURCE
29
30 #include <arpa/inet.h>
31 #include <error.h>
32 #include <errno.h>
33 #include <limits.h>
34 #include <linux/errqueue.h>
35 #include <linux/if_packet.h>
36 #include <linux/ipv6.h>
37 #include <linux/socket.h>
38 #include <linux/sockios.h>
39 #include <net/ethernet.h>
40 #include <net/if.h>
41 #include <netinet/ip.h>
42 #include <netinet/ip6.h>
43 #include <netinet/tcp.h>
44 #include <netinet/udp.h>
45 #include <poll.h>
46 #include <sched.h>
47 #include <stdbool.h>
48 #include <stdio.h>
49 #include <stdint.h>
50 #include <stdlib.h>
51 #include <string.h>
52 #include <sys/ioctl.h>
53 #include <sys/socket.h>
54 #include <sys/stat.h>
55 #include <sys/time.h>
56 #include <sys/types.h>
57 #include <sys/wait.h>
58 #include <unistd.h>
59 #include <linux/rds.h>
60
61 #ifndef SO_EE_ORIGIN_ZEROCOPY
62 #define SO_EE_ORIGIN_ZEROCOPY 5
63 #endif
64
65 #ifndef SO_ZEROCOPY
66 #define SO_ZEROCOPY 60
67 #endif
68
69 #ifndef SO_EE_CODE_ZEROCOPY_COPIED
70 #define SO_EE_CODE_ZEROCOPY_COPIED 1
71 #endif
72
73 #ifndef MSG_ZEROCOPY
74 #define MSG_ZEROCOPY 0x4000000
75 #endif
76
77 static int cfg_cork;
78 static bool cfg_cork_mixed;
79 static int cfg_cpu = -1; /* default: pin to last cpu */
80 static int cfg_family = PF_UNSPEC;
81 static int cfg_ifindex = 1;
82 static int cfg_payload_len;
83 static int cfg_port = 8000;
84 static bool cfg_rx;
85 static int cfg_runtime_ms = 4200;
86 static int cfg_verbose;
87 static int cfg_waittime_ms = 500;
88 static bool cfg_zerocopy;
89
90 static socklen_t cfg_alen;
91 static struct sockaddr_storage cfg_dst_addr;
92 static struct sockaddr_storage cfg_src_addr;
93
94 static char payload[IP_MAXPACKET];
95 static long packets, bytes, completions, expected_completions;
96 static int zerocopied = -1;
97 static uint32_t next_completion;
98
99 static unsigned long gettimeofday_ms(void)
100 {
101 struct timeval tv;
102
103 gettimeofday(&tv, NULL);
104 return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
105 }
106
107 static uint16_t get_ip_csum(const uint16_t *start, int num_words)
108 {
109 unsigned long sum = 0;
110 int i;
111
112 for (i = 0; i < num_words; i++)
113 sum += start[i];
114
115 while (sum >> 16)
116 sum = (sum & 0xFFFF) + (sum >> 16);
117
118 return ~sum;
119 }
120
121 static int do_setcpu(int cpu)
122 {
123 cpu_set_t mask;
124
125 CPU_ZERO(&mask);
126 CPU_SET(cpu, &mask);
127 if (sched_setaffinity(0, sizeof(mask), &mask))
128 error(1, 0, "setaffinity %d", cpu);
129
130 if (cfg_verbose)
131 fprintf(stderr, "cpu: %u\n", cpu);
132
133 return 0;
134 }
135
136 static void do_setsockopt(int fd, int level, int optname, int val)
137 {
138 if (setsockopt(fd, level, optname, &val, sizeof(val)))
139 error(1, errno, "setsockopt %d.%d: %d", level, optname, val);
140 }
141
142 static int do_poll(int fd, int events)
143 {
144 struct pollfd pfd;
145 int ret;
146
147 pfd.events = events;
148 pfd.revents = 0;
149 pfd.fd = fd;
150
151 ret = poll(&pfd, 1, cfg_waittime_ms);
152 if (ret == -1)
153 error(1, errno, "poll");
154
155 return ret && (pfd.revents & events);
156 }
157
158 static int do_accept(int fd)
159 {
160 int fda = fd;
161
162 fd = accept(fda, NULL, NULL);
163 if (fd == -1)
164 error(1, errno, "accept");
165 if (close(fda))
166 error(1, errno, "close listen sock");
167
168 return fd;
169 }
170
171 static void add_zcopy_cookie(struct msghdr *msg, uint32_t cookie)
172 {
173 struct cmsghdr *cm;
174
175 if (!msg->msg_control)
176 error(1, errno, "NULL cookie");
177 cm = (void *)msg->msg_control;
178 cm->cmsg_len = CMSG_LEN(sizeof(cookie));
179 cm->cmsg_level = SOL_RDS;
180 cm->cmsg_type = RDS_CMSG_ZCOPY_COOKIE;
181 memcpy(CMSG_DATA(cm), &cookie, sizeof(cookie));
182 }
183
184 static bool do_sendmsg(int fd, struct msghdr *msg, bool do_zerocopy, int domain)
185 {
186 int ret, len, i, flags;
187 static uint32_t cookie;
188 char ckbuf[CMSG_SPACE(sizeof(cookie))];
189
190 len = 0;
191 for (i = 0; i < msg->msg_iovlen; i++)
192 len += msg->msg_iov[i].iov_len;
193
194 flags = MSG_DONTWAIT;
195 if (do_zerocopy) {
196 flags |= MSG_ZEROCOPY;
197 if (domain == PF_RDS) {
198 memset(&msg->msg_control, 0, sizeof(msg->msg_control));
199 msg->msg_controllen = CMSG_SPACE(sizeof(cookie));
200 msg->msg_control = (struct cmsghdr *)ckbuf;
201 add_zcopy_cookie(msg, ++cookie);
202 }
203 }
204
205 ret = sendmsg(fd, msg, flags);
206 if (ret == -1 && errno == EAGAIN)
207 return false;
208 if (ret == -1)
209 error(1, errno, "send");
210 if (cfg_verbose && ret != len)
211 fprintf(stderr, "send: ret=%u != %u\n", ret, len);
212
213 if (len) {
214 packets++;
215 bytes += ret;
216 if (do_zerocopy && ret)
217 expected_completions++;
218 }
219 if (do_zerocopy && domain == PF_RDS) {
220 msg->msg_control = NULL;
221 msg->msg_controllen = 0;
222 }
223
224 return true;
225 }
226
227 static void do_sendmsg_corked(int fd, struct msghdr *msg)
228 {
229 bool do_zerocopy = cfg_zerocopy;
230 int i, payload_len, extra_len;
231
232 /* split up the packet. for non-multiple, make first buffer longer */
233 payload_len = cfg_payload_len / cfg_cork;
234 extra_len = cfg_payload_len - (cfg_cork * payload_len);
235
236 do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 1);
237
238 for (i = 0; i < cfg_cork; i++) {
239
240 /* in mixed-frags mode, alternate zerocopy and copy frags
241 * start with non-zerocopy, to ensure attach later works
242 */
243 if (cfg_cork_mixed)
244 do_zerocopy = (i & 1);
245
246 msg->msg_iov[0].iov_len = payload_len + extra_len;
247 extra_len = 0;
248
249 do_sendmsg(fd, msg, do_zerocopy,
250 (cfg_dst_addr.ss_family == AF_INET ?
251 PF_INET : PF_INET6));
252 }
253
254 do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0);
255 }
256
257 static int setup_iph(struct iphdr *iph, uint16_t payload_len)
258 {
259 struct sockaddr_in *daddr = (void *) &cfg_dst_addr;
260 struct sockaddr_in *saddr = (void *) &cfg_src_addr;
261
262 memset(iph, 0, sizeof(*iph));
263
264 iph->version = 4;
265 iph->tos = 0;
266 iph->ihl = 5;
267 iph->ttl = 2;
268 iph->saddr = saddr->sin_addr.s_addr;
269 iph->daddr = daddr->sin_addr.s_addr;
270 iph->protocol = IPPROTO_EGP;
271 iph->tot_len = htons(sizeof(*iph) + payload_len);
272 iph->check = get_ip_csum((void *) iph, iph->ihl << 1);
273
274 return sizeof(*iph);
275 }
276
277 static int setup_ip6h(struct ipv6hdr *ip6h, uint16_t payload_len)
278 {
279 struct sockaddr_in6 *daddr = (void *) &cfg_dst_addr;
280 struct sockaddr_in6 *saddr = (void *) &cfg_src_addr;
281
282 memset(ip6h, 0, sizeof(*ip6h));
283
284 ip6h->version = 6;
285 ip6h->payload_len = htons(payload_len);
286 ip6h->nexthdr = IPPROTO_EGP;
287 ip6h->hop_limit = 2;
288 ip6h->saddr = saddr->sin6_addr;
289 ip6h->daddr = daddr->sin6_addr;
290
291 return sizeof(*ip6h);
292 }
293
294
295 static void setup_sockaddr(int domain, const char *str_addr,
296 struct sockaddr_storage *sockaddr)
297 {
298 struct sockaddr_in6 *addr6 = (void *) sockaddr;
299 struct sockaddr_in *addr4 = (void *) sockaddr;
300
301 switch (domain) {
302 case PF_INET:
303 memset(addr4, 0, sizeof(*addr4));
304 addr4->sin_family = AF_INET;
305 addr4->sin_port = htons(cfg_port);
306 if (str_addr &&
307 inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
308 error(1, 0, "ipv4 parse error: %s", str_addr);
309 break;
310 case PF_INET6:
311 memset(addr6, 0, sizeof(*addr6));
312 addr6->sin6_family = AF_INET6;
313 addr6->sin6_port = htons(cfg_port);
314 if (str_addr &&
315 inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
316 error(1, 0, "ipv6 parse error: %s", str_addr);
317 break;
318 default:
319 error(1, 0, "illegal domain");
320 }
321 }
322
323 static int do_setup_tx(int domain, int type, int protocol)
324 {
325 int fd;
326
327 fd = socket(domain, type, protocol);
328 if (fd == -1)
329 error(1, errno, "socket t");
330
331 do_setsockopt(fd, SOL_SOCKET, SO_SNDBUF, 1 << 21);
332 if (cfg_zerocopy)
333 do_setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, 1);
334
335 if (domain != PF_PACKET && domain != PF_RDS)
336 if (connect(fd, (void *) &cfg_dst_addr, cfg_alen))
337 error(1, errno, "connect");
338
339 if (domain == PF_RDS) {
340 if (bind(fd, (void *) &cfg_src_addr, cfg_alen))
341 error(1, errno, "bind");
342 }
343
344 return fd;
345 }
346
347 static uint32_t do_process_zerocopy_cookies(struct rds_zcopy_cookies *ck)
348 {
349 int i;
350
351 if (ck->num > RDS_MAX_ZCOOKIES)
352 error(1, 0, "Returned %d cookies, max expected %d\n",
353 ck->num, RDS_MAX_ZCOOKIES);
354 for (i = 0; i < ck->num; i++)
355 if (cfg_verbose >= 2)
356 fprintf(stderr, "%d\n", ck->cookies[i]);
357 return ck->num;
358 }
359
360 static bool do_recvmsg_completion(int fd)
361 {
362 char cmsgbuf[CMSG_SPACE(sizeof(struct rds_zcopy_cookies))];
363 struct rds_zcopy_cookies *ck;
364 struct cmsghdr *cmsg;
365 struct msghdr msg;
366 bool ret = false;
367
368 memset(&msg, 0, sizeof(msg));
369 msg.msg_control = cmsgbuf;
370 msg.msg_controllen = sizeof(cmsgbuf);
371
372 if (recvmsg(fd, &msg, MSG_DONTWAIT))
373 return ret;
374
375 if (msg.msg_flags & MSG_CTRUNC)
376 error(1, errno, "recvmsg notification: truncated");
377
378 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
379 if (cmsg->cmsg_level == SOL_RDS &&
380 cmsg->cmsg_type == RDS_CMSG_ZCOPY_COMPLETION) {
381
382 ck = (struct rds_zcopy_cookies *)CMSG_DATA(cmsg);
383 completions += do_process_zerocopy_cookies(ck);
384 ret = true;
385 break;
386 }
387 error(0, 0, "ignoring cmsg at level %d type %d\n",
388 cmsg->cmsg_level, cmsg->cmsg_type);
389 }
390 return ret;
391 }
392
393 static bool do_recv_completion(int fd, int domain)
394 {
395 struct sock_extended_err *serr;
396 struct msghdr msg = {};
397 struct cmsghdr *cm;
398 uint32_t hi, lo, range;
399 int ret, zerocopy;
400 char control[100];
401
402 if (domain == PF_RDS)
403 return do_recvmsg_completion(fd);
404
405 msg.msg_control = control;
406 msg.msg_controllen = sizeof(control);
407
408 ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
409 if (ret == -1 && errno == EAGAIN)
410 return false;
411 if (ret == -1)
412 error(1, errno, "recvmsg notification");
413 if (msg.msg_flags & MSG_CTRUNC)
414 error(1, errno, "recvmsg notification: truncated");
415
416 cm = CMSG_FIRSTHDR(&msg);
417 if (!cm)
418 error(1, 0, "cmsg: no cmsg");
419 if (!((cm->cmsg_level == SOL_IP && cm->cmsg_type == IP_RECVERR) ||
420 (cm->cmsg_level == SOL_IPV6 && cm->cmsg_type == IPV6_RECVERR) ||
421 (cm->cmsg_level == SOL_PACKET && cm->cmsg_type == PACKET_TX_TIMESTAMP)))
422 error(1, 0, "serr: wrong type: %d.%d",
423 cm->cmsg_level, cm->cmsg_type);
424
425 serr = (void *) CMSG_DATA(cm);
426
427 if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY)
428 error(1, 0, "serr: wrong origin: %u", serr->ee_origin);
429 if (serr->ee_errno != 0)
430 error(1, 0, "serr: wrong error code: %u", serr->ee_errno);
431
432 hi = serr->ee_data;
433 lo = serr->ee_info;
434 range = hi - lo + 1;
435
436 /* Detect notification gaps. These should not happen often, if at all.
437 * Gaps can occur due to drops, reordering and retransmissions.
438 */
439 if (lo != next_completion)
440 fprintf(stderr, "gap: %u..%u does not append to %u\n",
441 lo, hi, next_completion);
442 next_completion = hi + 1;
443
444 zerocopy = !(serr->ee_code & SO_EE_CODE_ZEROCOPY_COPIED);
445 if (zerocopied == -1)
446 zerocopied = zerocopy;
447 else if (zerocopied != zerocopy) {
448 fprintf(stderr, "serr: inconsistent\n");
449 zerocopied = zerocopy;
450 }
451
452 if (cfg_verbose >= 2)
453 fprintf(stderr, "completed: %u (h=%u l=%u)\n",
454 range, hi, lo);
455
456 completions += range;
457 return true;
458 }
459
460 /* Read all outstanding messages on the errqueue */
461 static void do_recv_completions(int fd, int domain)
462 {
463 while (do_recv_completion(fd, domain)) {}
464 }
465
466 /* Wait for all remaining completions on the errqueue */
467 static void do_recv_remaining_completions(int fd, int domain)
468 {
469 int64_t tstop = gettimeofday_ms() + cfg_waittime_ms;
470
471 while (completions < expected_completions &&
472 gettimeofday_ms() < tstop) {
473 if (do_poll(fd, domain == PF_RDS ? POLLIN : POLLERR))
474 do_recv_completions(fd, domain);
475 }
476
477 if (completions < expected_completions)
478 fprintf(stderr, "missing notifications: %lu < %lu\n",
479 completions, expected_completions);
480 }
481
482 static void do_tx(int domain, int type, int protocol)
483 {
484 struct iovec iov[3] = { {0} };
485 struct sockaddr_ll laddr;
486 struct msghdr msg = {0};
487 struct ethhdr eth;
488 union {
489 struct ipv6hdr ip6h;
490 struct iphdr iph;
491 } nh;
492 uint64_t tstop;
493 int fd;
494
495 fd = do_setup_tx(domain, type, protocol);
496
497 if (domain == PF_PACKET) {
498 uint16_t proto = cfg_family == PF_INET ? ETH_P_IP : ETH_P_IPV6;
499
500 /* sock_raw passes ll header as data */
501 if (type == SOCK_RAW) {
502 memset(eth.h_dest, 0x06, ETH_ALEN);
503 memset(eth.h_source, 0x02, ETH_ALEN);
504 eth.h_proto = htons(proto);
505 iov[0].iov_base = &eth;
506 iov[0].iov_len = sizeof(eth);
507 msg.msg_iovlen++;
508 }
509
510 /* both sock_raw and sock_dgram expect name */
511 memset(&laddr, 0, sizeof(laddr));
512 laddr.sll_family = AF_PACKET;
513 laddr.sll_ifindex = cfg_ifindex;
514 laddr.sll_protocol = htons(proto);
515 laddr.sll_halen = ETH_ALEN;
516
517 memset(laddr.sll_addr, 0x06, ETH_ALEN);
518
519 msg.msg_name = &laddr;
520 msg.msg_namelen = sizeof(laddr);
521 }
522
523 /* packet and raw sockets with hdrincl must pass network header */
524 if (domain == PF_PACKET || protocol == IPPROTO_RAW) {
525 if (cfg_family == PF_INET)
526 iov[1].iov_len = setup_iph(&nh.iph, cfg_payload_len);
527 else
528 iov[1].iov_len = setup_ip6h(&nh.ip6h, cfg_payload_len);
529
530 iov[1].iov_base = (void *) &nh;
531 msg.msg_iovlen++;
532 }
533
534 if (domain == PF_RDS) {
535 msg.msg_name = &cfg_dst_addr;
536 msg.msg_namelen = (cfg_dst_addr.ss_family == AF_INET ?
537 sizeof(struct sockaddr_in) :
538 sizeof(struct sockaddr_in6));
539 }
540
541 iov[2].iov_base = payload;
542 iov[2].iov_len = cfg_payload_len;
543 msg.msg_iovlen++;
544 msg.msg_iov = &iov[3 - msg.msg_iovlen];
545
546 tstop = gettimeofday_ms() + cfg_runtime_ms;
547 do {
548 if (cfg_cork)
549 do_sendmsg_corked(fd, &msg);
550 else
551 do_sendmsg(fd, &msg, cfg_zerocopy, domain);
552
553 while (!do_poll(fd, POLLOUT)) {
554 if (cfg_zerocopy)
555 do_recv_completions(fd, domain);
556 }
557
558 } while (gettimeofday_ms() < tstop);
559
560 if (cfg_zerocopy)
561 do_recv_remaining_completions(fd, domain);
562
563 if (close(fd))
564 error(1, errno, "close");
565
566 fprintf(stderr, "tx=%lu (%lu MB) txc=%lu zc=%c\n",
567 packets, bytes >> 20, completions,
568 zerocopied == 1 ? 'y' : 'n');
569 }
570
571 static int do_setup_rx(int domain, int type, int protocol)
572 {
573 int fd;
574
575 /* If tx over PF_PACKET, rx over PF_INET(6)/SOCK_RAW,
576 * to recv the only copy of the packet, not a clone
577 */
578 if (domain == PF_PACKET)
579 error(1, 0, "Use PF_INET/SOCK_RAW to read");
580
581 if (type == SOCK_RAW && protocol == IPPROTO_RAW)
582 error(1, 0, "IPPROTO_RAW: not supported on Rx");
583
584 fd = socket(domain, type, protocol);
585 if (fd == -1)
586 error(1, errno, "socket r");
587
588 do_setsockopt(fd, SOL_SOCKET, SO_RCVBUF, 1 << 21);
589 do_setsockopt(fd, SOL_SOCKET, SO_RCVLOWAT, 1 << 16);
590 do_setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, 1);
591
592 if (bind(fd, (void *) &cfg_dst_addr, cfg_alen))
593 error(1, errno, "bind");
594
595 if (type == SOCK_STREAM) {
596 if (listen(fd, 1))
597 error(1, errno, "listen");
598 fd = do_accept(fd);
599 }
600
601 return fd;
602 }
603
604 /* Flush all outstanding bytes for the tcp receive queue */
605 static void do_flush_tcp(int fd)
606 {
607 int ret;
608
609 /* MSG_TRUNC flushes up to len bytes */
610 ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT);
611 if (ret == -1 && errno == EAGAIN)
612 return;
613 if (ret == -1)
614 error(1, errno, "flush");
615 if (!ret)
616 return;
617
618 packets++;
619 bytes += ret;
620 }
621
622 /* Flush all outstanding datagrams. Verify first few bytes of each. */
623 static void do_flush_datagram(int fd, int type)
624 {
625 int ret, off = 0;
626 char buf[64];
627
628 /* MSG_TRUNC will return full datagram length */
629 ret = recv(fd, buf, sizeof(buf), MSG_DONTWAIT | MSG_TRUNC);
630 if (ret == -1 && errno == EAGAIN)
631 return;
632
633 /* raw ipv4 return with header, raw ipv6 without */
634 if (cfg_family == PF_INET && type == SOCK_RAW) {
635 off += sizeof(struct iphdr);
636 ret -= sizeof(struct iphdr);
637 }
638
639 if (ret == -1)
640 error(1, errno, "recv");
641 if (ret != cfg_payload_len)
642 error(1, 0, "recv: ret=%u != %u", ret, cfg_payload_len);
643 if (ret > sizeof(buf) - off)
644 ret = sizeof(buf) - off;
645 if (memcmp(buf + off, payload, ret))
646 error(1, 0, "recv: data mismatch");
647
648 packets++;
649 bytes += cfg_payload_len;
650 }
651
652 static void do_rx(int domain, int type, int protocol)
653 {
654 uint64_t tstop;
655 int fd;
656
657 fd = do_setup_rx(domain, type, protocol);
658
659 tstop = gettimeofday_ms() + cfg_runtime_ms;
660 do {
661 if (type == SOCK_STREAM)
662 do_flush_tcp(fd);
663 else
664 do_flush_datagram(fd, type);
665
666 do_poll(fd, POLLIN);
667
668 } while (gettimeofday_ms() < tstop);
669
670 if (close(fd))
671 error(1, errno, "close");
672
673 fprintf(stderr, "rx=%lu (%lu MB)\n", packets, bytes >> 20);
674 }
675
676 static void do_test(int domain, int type, int protocol)
677 {
678 int i;
679
680 if (cfg_cork && (domain == PF_PACKET || type != SOCK_DGRAM))
681 error(1, 0, "can only cork udp sockets");
682
683 do_setcpu(cfg_cpu);
684
685 for (i = 0; i < IP_MAXPACKET; i++)
686 payload[i] = 'a' + (i % 26);
687
688 if (cfg_rx)
689 do_rx(domain, type, protocol);
690 else
691 do_tx(domain, type, protocol);
692 }
693
694 static void usage(const char *filepath)
695 {
696 error(1, 0, "Usage: %s [options] <test>", filepath);
697 }
698
699 static void parse_opts(int argc, char **argv)
700 {
701 const int max_payload_len = sizeof(payload) -
702 sizeof(struct ipv6hdr) -
703 sizeof(struct tcphdr) -
704 40 /* max tcp options */;
705 int c;
706 char *daddr = NULL, *saddr = NULL;
707 char *cfg_test;
708
709 cfg_payload_len = max_payload_len;
710
711 while ((c = getopt(argc, argv, "46c:C:D:i:mp:rs:S:t:vz")) != -1) {
712 switch (c) {
713 case '4':
714 if (cfg_family != PF_UNSPEC)
715 error(1, 0, "Pass one of -4 or -6");
716 cfg_family = PF_INET;
717 cfg_alen = sizeof(struct sockaddr_in);
718 break;
719 case '6':
720 if (cfg_family != PF_UNSPEC)
721 error(1, 0, "Pass one of -4 or -6");
722 cfg_family = PF_INET6;
723 cfg_alen = sizeof(struct sockaddr_in6);
724 break;
725 case 'c':
726 cfg_cork = strtol(optarg, NULL, 0);
727 break;
728 case 'C':
729 cfg_cpu = strtol(optarg, NULL, 0);
730 break;
731 case 'D':
732 daddr = optarg;
733 break;
734 case 'i':
735 cfg_ifindex = if_nametoindex(optarg);
736 if (cfg_ifindex == 0)
737 error(1, errno, "invalid iface: %s", optarg);
738 break;
739 case 'm':
740 cfg_cork_mixed = true;
741 break;
742 case 'p':
743 cfg_port = strtoul(optarg, NULL, 0);
744 break;
745 case 'r':
746 cfg_rx = true;
747 break;
748 case 's':
749 cfg_payload_len = strtoul(optarg, NULL, 0);
750 break;
751 case 'S':
752 saddr = optarg;
753 break;
754 case 't':
755 cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000;
756 break;
757 case 'v':
758 cfg_verbose++;
759 break;
760 case 'z':
761 cfg_zerocopy = true;
762 break;
763 }
764 }
765
766 cfg_test = argv[argc - 1];
767 if (strcmp(cfg_test, "rds") == 0) {
768 if (!daddr)
769 error(1, 0, "-D <server addr> required for PF_RDS\n");
770 if (!cfg_rx && !saddr)
771 error(1, 0, "-S <client addr> required for PF_RDS\n");
772 }
773 setup_sockaddr(cfg_family, daddr, &cfg_dst_addr);
774 setup_sockaddr(cfg_family, saddr, &cfg_src_addr);
775
776 if (cfg_payload_len > max_payload_len)
777 error(1, 0, "-s: payload exceeds max (%d)", max_payload_len);
778 if (cfg_cork_mixed && (!cfg_zerocopy || !cfg_cork))
779 error(1, 0, "-m: cork_mixed requires corking and zerocopy");
780
781 if (optind != argc - 1)
782 usage(argv[0]);
783 }
784
785 int main(int argc, char **argv)
786 {
787 const char *cfg_test;
788
789 parse_opts(argc, argv);
790
791 cfg_test = argv[argc - 1];
792
793 if (!strcmp(cfg_test, "packet"))
794 do_test(PF_PACKET, SOCK_RAW, 0);
795 else if (!strcmp(cfg_test, "packet_dgram"))
796 do_test(PF_PACKET, SOCK_DGRAM, 0);
797 else if (!strcmp(cfg_test, "raw"))
798 do_test(cfg_family, SOCK_RAW, IPPROTO_EGP);
799 else if (!strcmp(cfg_test, "raw_hdrincl"))
800 do_test(cfg_family, SOCK_RAW, IPPROTO_RAW);
801 else if (!strcmp(cfg_test, "tcp"))
802 do_test(cfg_family, SOCK_STREAM, 0);
803 else if (!strcmp(cfg_test, "udp"))
804 do_test(cfg_family, SOCK_DGRAM, 0);
805 else if (!strcmp(cfg_test, "rds"))
806 do_test(PF_RDS, SOCK_SEQPACKET, 0);
807 else
808 error(1, 0, "unknown cfg_test %s", cfg_test);
809
810 return 0;
811 }
Linux with added FPC-III support