2 * Copyright (c) 2012 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/tools/tools/netrate/pktgen/pktgen.c,v 1.4 2008/04/02 14:18:55 sephe Exp $
39 #include <sys/param.h>
41 #include <sys/device.h>
42 #include <sys/in_cksum.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
48 #include <sys/queue.h>
49 #include <sys/socket.h>
50 #include <sys/systm.h>
51 #include <sys/serialize.h>
54 #include <net/if_dl.h>
55 #include <net/if_var.h>
56 #include <net/ifq_var.h>
57 #include <net/ethernet.h>
58 #include <net/netmsg2.h>
60 #include <netinet/in.h>
61 #include <netinet/ip.h>
62 #include <netinet/udp_var.h>
66 #define CDEV_NAME "pktg"
68 #define PKTGEN_BUFSZ 2048
71 #define PKTGEN_DEVCNT 4
77 struct netmsg_base pb_nmsg; /* MUST BE THE FIRST */
82 struct ifaltq_subque *pb_ifsq;
85 struct pktgen *pb_pktg;
86 LIST_ENTRY(pktgen_buf) pb_link;
90 struct callout pktg_stop;
91 LIST_HEAD(, pktgen_buf) pktg_buflist;
95 uint32_t pktg_flags; /* PKTG_F_ */
101 struct ifnet *pktg_ifp;
105 struct sockaddr_in pktg_src;
107 struct sockaddr_in *pktg_dst;
108 uint8_t pktg_dst_lladdr[ETHER_ADDR_LEN];
110 struct pktgen_pcpu pktg_pcpu[MAXCPU];
113 #define PKTG_F_CONFIG 0x1
114 #define PKTG_F_RUNNING 0x4
116 static int pktgen_modevent(module_t, int, void *);
118 static void pktgen_buf_free(void *);
119 static void pktgen_buf_ref(void *);
120 static void pktgen_buf_send(netmsg_t);
122 static int pktgen_config(struct pktgen *,
123 const struct pktgen_conf *);
124 static int pktgen_start(struct pktgen *);
125 static void pktgen_free(struct pktgen *);
126 static void pktgen_pcpu_stop_cb(void *);
127 static void pktgen_mbuf(struct pktgen_buf *, struct mbuf *);
129 static d_open_t pktgen_open;
130 static d_close_t pktgen_close;
131 static d_ioctl_t pktgen_ioctl;
133 static struct dev_ops pktgen_ops = {
134 { CDEV_NAME, 0, D_MPSAFE },
135 .d_open = pktgen_open,
136 .d_close = pktgen_close,
137 .d_ioctl = pktgen_ioctl,
140 static volatile int pktgen_refcnt;
141 static struct lwkt_token pktgen_tok = LWKT_TOKEN_INITIALIZER(pktgen_token);
143 MALLOC_DECLARE(M_PKTGEN);
144 MALLOC_DEFINE(M_PKTGEN, CDEV_NAME, "Packet generator");
146 DEV_MODULE(pktgen, pktgen_modevent, NULL);
149 pktgen_modevent(module_t mod, int type, void *data)
155 for (i = 0; i < PKTGEN_DEVCNT; ++i) {
156 make_dev(&pktgen_ops, 0, UID_ROOT, GID_WHEEL, 0600,
162 if (pktgen_refcnt > 0)
164 dev_ops_remove_all(&pktgen_ops);
175 pktgen_open(struct dev_open_args *ap)
177 cdev_t dev = ap->a_head.a_dev;
181 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0);
185 lwkt_gettoken(&pktgen_tok);
187 if (dev->si_drv1 != NULL) {
188 lwkt_reltoken(&pktgen_tok);
192 pktg = kmalloc(sizeof(*pktg), M_PKTGEN, M_ZERO | M_WAITOK);
193 for (i = 0; i < ncpus; ++i) {
194 struct pktgen_pcpu *p = &pktg->pktg_pcpu[i];
196 callout_init_mp(&p->pktg_stop);
197 LIST_INIT(&p->pktg_buflist);
201 pktg->pktg_refcnt = 1;
203 atomic_add_int(&pktgen_refcnt, 1);
205 lwkt_reltoken(&pktgen_tok);
210 pktgen_close(struct dev_close_args *ap)
212 cdev_t dev = ap->a_head.a_dev;
213 struct pktgen *pktg = dev->si_drv1;
215 lwkt_gettoken(&pktgen_tok);
217 lwkt_reltoken(&pktgen_tok);
225 pktgen_ioctl(struct dev_ioctl_args *ap __unused)
227 cdev_t dev = ap->a_head.a_dev;
228 caddr_t data = ap->a_data;
229 struct pktgen *pktg = dev->si_drv1;
232 lwkt_gettoken(&pktgen_tok);
236 error = pktgen_start(pktg);
240 error = pktgen_config(pktg, (const struct pktgen_conf *)data);
248 lwkt_reltoken(&pktgen_tok);
253 pktgen_config(struct pktgen *pktg, const struct pktgen_conf *conf)
255 const struct sockaddr_in *sin;
256 struct sockaddr_in *dst = NULL;
257 const struct sockaddr *sa;
260 int i, error, pktenq;
262 if (pktg->pktg_flags & (PKTG_F_RUNNING | PKTG_F_CONFIG))
265 if (conf->pc_datalen <= 0 ||
266 conf->pc_datalen > ETHERMTU - sizeof(struct udpiphdr))
268 if (conf->pc_duration <= 0)
272 if (sin->sin_family != AF_INET)
273 return EPROTONOSUPPORT;
274 if (sin->sin_port == 0)
277 if (conf->pc_ndst <= 0)
279 dst_size = conf->pc_ndst * sizeof(struct sockaddr_in);
281 dst = kmalloc(dst_size, M_PKTGEN, M_WAITOK | M_NULLOK);
285 error = copyin(conf->pc_dst, dst, dst_size);
289 for (i = 0; i < conf->pc_ndst; ++i) {
291 if (sin->sin_family != AF_INET) {
292 error = EPROTONOSUPPORT;
295 if (sin->sin_port == 0) {
301 ifp = ifunit(conf->pc_ifname);
307 pktenq = conf->pc_pktenq;
308 if (pktenq < 0 || pktenq > ifp->if_snd.altq_maxlen) {
311 } else if (pktenq == 0) {
312 pktenq = (ifp->if_snd.altq_maxlen * 3) / 4;
315 sa = &conf->pc_dst_lladdr;
316 if (sa->sa_family != AF_LINK) {
317 error = EPROTONOSUPPORT;
320 if (sa->sa_len != ETHER_ADDR_LEN) {
321 error = EPROTONOSUPPORT;
324 if (ETHER_IS_MULTICAST(sa->sa_data) ||
325 bcmp(sa->sa_data, ifp->if_broadcastaddr, ifp->if_addrlen) == 0) {
326 error = EADDRNOTAVAIL;
333 pktg->pktg_flags |= PKTG_F_CONFIG;
335 pktg->pktg_duration = conf->pc_duration;
336 pktg->pktg_datalen = conf->pc_datalen;
337 pktg->pktg_pktenq = pktenq;
338 pktg->pktg_ifp = ifp;
339 pktg->pktg_src = conf->pc_src;
340 pktg->pktg_ndst = conf->pc_ndst;
341 KKASSERT(pktg->pktg_dst == NULL);
342 pktg->pktg_dst = dst;
343 bcopy(sa->sa_data, pktg->pktg_dst_lladdr, ETHER_ADDR_LEN);
349 kfree(dst, M_PKTGEN);
354 pktgen_start(struct pktgen *pktg)
356 struct mbuf *m, *head = NULL, **next;
358 struct ifaltq_subque *ifsq;
359 struct pktgen_pcpu *p;
360 int cpuid, orig_cpuid, i, alloc_cnt, keep_cnt;
365 if ((pktg->pktg_flags & PKTG_F_CONFIG) == 0)
367 if (pktg->pktg_flags & PKTG_F_RUNNING)
369 pktg->pktg_flags |= PKTG_F_RUNNING;
371 ifp = pktg->pktg_ifp;
372 ifsq = ifq_get_subq_default(&ifp->if_snd);
374 orig_cpuid = mycpuid;
375 cpuid = ifsq_get_cpuid(ifsq);
376 if (cpuid != orig_cpuid)
377 lwkt_migratecpu(cpuid);
379 p = &pktg->pktg_pcpu[cpuid];
381 keep_cnt = pktg->pktg_pktenq;
382 alloc_cnt = keep_cnt * 2;
385 * Prefault enough mbuf into mbuf objcache
388 for (i = 0; i < alloc_cnt; ++i) {
389 MGETHDR(m, MB_WAIT, MT_DATA);
391 next = &m->m_nextpkt;
394 for (i = 0; i < alloc_cnt - keep_cnt; ++i) {
400 KKASSERT(head != NULL);
403 * Setup the packets' data
405 ip_len = pktg->pktg_datalen + sizeof(struct udpiphdr);
406 len = ip_len + ETHER_HDR_LEN;
408 psum = htons((u_short)pktg->pktg_datalen + sizeof(struct udphdr) +
410 ulen = htons(pktg->pktg_datalen + sizeof(struct udphdr));
416 const struct sockaddr_in *dst;
417 struct pktgen_buf *pb;
420 struct ether_header *eh;
422 atomic_add_int(&pktg->pktg_refcnt, 1);
423 atomic_add_int(&pktgen_refcnt, 1);
425 pb = kmalloc(sizeof(*pb), M_PKTGEN, M_WAITOK | M_ZERO);
429 pb->pb_buf = kmalloc(PKTGEN_BUFSZ, M_PKTGEN, M_WAITOK);
431 pb->pb_cpuid = cpuid;
433 netmsg_init(&pb->pb_nmsg, NULL, &netisr_adone_rport, 0,
435 LIST_INSERT_HEAD(&p->pktg_buflist, pb, pb_link);
437 dst = &pktg->pktg_dst[i % pktg->pktg_ndst];
440 m->m_ext.ext_arg = pb;
441 m->m_ext.ext_buf = pb->pb_buf;
442 m->m_ext.ext_free = pktgen_buf_free;
443 m->m_ext.ext_ref = pktgen_buf_ref;
444 m->m_ext.ext_size = PKTGEN_BUFSZ;
446 m->m_data = m->m_ext.ext_buf;
448 m->m_len = m->m_pkthdr.len = len;
450 m->m_data += ETHER_HDR_LEN;
451 m->m_len -= ETHER_HDR_LEN;
452 m->m_pkthdr.len -= ETHER_HDR_LEN;
454 ui = mtod(m, struct udpiphdr *);
455 ui->ui_pr = IPPROTO_UDP;
456 ui->ui_src.s_addr = pktg->pktg_src.sin_addr.s_addr;
457 ui->ui_dst.s_addr = dst->sin_addr.s_addr;
458 ui->ui_sport = pktg->pktg_src.sin_port;
459 ui->ui_dport = dst->sin_port;
461 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
463 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
465 ip = (struct ip *)ui;
467 ip->ip_ttl = 64; /* XXX */
468 ip->ip_tos = 0; /* XXX */
469 ip->ip_vhl = IP_VHL_BORING;
472 ip->ip_id = ip_newid();
476 ip->ip_len = htons(ip->ip_len);
477 ip->ip_sum = in_cksum_hdr(ip);
479 m->m_data -= ETHER_HDR_LEN;
480 m->m_len += ETHER_HDR_LEN;
481 m->m_pkthdr.len += ETHER_HDR_LEN;
483 eh = mtod(m, struct ether_header *);
484 bcopy(pktg->pktg_dst_lladdr, eh->ether_dhost, ETHER_ADDR_LEN);
485 bcopy(IF_LLADDR(ifp), eh->ether_shost, ETHER_ADDR_LEN);
486 eh->ether_type = htons(ETHERTYPE_IP);
488 nextm = m->m_nextpkt;
491 ifq_dispatch(ifp, m, NULL);
496 callout_reset(&p->pktg_stop, pktg->pktg_duration * hz,
497 pktgen_pcpu_stop_cb, p);
499 if (cpuid != orig_cpuid)
500 lwkt_migratecpu(orig_cpuid);
506 pktgen_mbuf(struct pktgen_buf *pb, struct mbuf *m)
508 m->m_ext.ext_arg = pb;
509 m->m_ext.ext_buf = pb->pb_buf;
510 m->m_ext.ext_free = pktgen_buf_free;
511 m->m_ext.ext_ref = pktgen_buf_ref;
512 m->m_ext.ext_size = PKTGEN_BUFSZ;
514 m->m_data = m->m_ext.ext_buf;
516 m->m_len = m->m_pkthdr.len = pb->pb_len;
520 pktgen_buf_send(netmsg_t msg)
522 struct pktgen_buf *pb = (struct pktgen_buf *)msg;
525 KKASSERT(&curthread->td_msgport == netisr_portfn(pb->pb_cpuid));
528 lwkt_replymsg(&pb->pb_nmsg.lmsg, 0);
531 MGETHDR(m, MB_WAIT, MT_DATA);
533 ifq_dispatch(pb->pb_ifp, m, NULL);
537 pktgen_buf_free(void *arg)
539 struct pktgen_buf *pb = arg;
542 KKASSERT(pb->pb_inuse > 0);
544 if (atomic_fetchadd_int(&pb->pb_inuse, -1) == 1) {
549 LIST_REMOVE(pb, pb_link);
551 kfree(pb->pb_buf, M_PKTGEN);
559 if (&curthread->td_msgport != netisr_portfn(pb->pb_cpuid)) {
560 KKASSERT(pb->pb_cpuid == mycpuid);
562 KKASSERT(pb->pb_nmsg.lmsg.ms_flags & MSGF_DONE);
563 lwkt_sendmsg(netisr_portfn(pb->pb_cpuid), &pb->pb_nmsg.lmsg);
568 MGETHDR(m, MB_WAIT, MT_DATA);
570 ifsq_enqueue(pb->pb_ifsq, m, NULL);
574 pktgen_buf_ref(void *arg)
576 struct pktgen_buf *pb = arg;
578 panic("%s should never be called\n", __func__);
580 KKASSERT(pb->pb_inuse > 0);
581 atomic_add_int(&pb->pb_inuse, 1);
585 pktgen_free(struct pktgen *pktg)
587 KKASSERT(pktg->pktg_refcnt > 0);
588 if (atomic_fetchadd_int(&pktg->pktg_refcnt, -1) == 1) {
591 if (pktg->pktg_dst != NULL)
592 kfree(pktg->pktg_dst, M_PKTGEN);
594 for (i = 0; i < ncpus; ++i)
595 KKASSERT(LIST_EMPTY(&pktg->pktg_pcpu[i].pktg_buflist));
596 kfree(pktg, M_PKTGEN);
599 KKASSERT(pktgen_refcnt > 0);
600 atomic_subtract_int(&pktgen_refcnt, 1);
604 pktgen_pcpu_stop_cb(void *arg)
606 struct pktgen_pcpu *p = arg;
607 struct pktgen_buf *pb;
610 LIST_FOREACH(pb, &p->pktg_buflist, pb_link)