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
76 struct netmsg_pktgen {
77 struct netmsg_base np_base;
78 struct pktgen *np_pktg;
79 struct ifaltq_subque *np_ifsq;
83 struct netmsg_base pb_nmsg; /* MUST BE THE FIRST */
88 struct ifaltq_subque *pb_ifsq;
91 struct pktgen *pb_pktg;
92 LIST_ENTRY(pktgen_buf) pb_link;
96 struct callout pktg_stop;
97 LIST_HEAD(, pktgen_buf) pktg_buflist;
101 uint32_t pktg_flags; /* PKTG_F_ */
107 struct ifnet *pktg_ifp;
111 struct sockaddr_in pktg_src;
113 struct sockaddr_in *pktg_dst;
114 uint8_t pktg_dst_lladdr[ETHER_ADDR_LEN];
116 struct pktgen_pcpu pktg_pcpu[MAXCPU];
119 #define PKTG_F_CONFIG 0x1
120 #define PKTG_F_RUNNING 0x4
122 static int pktgen_modevent(module_t, int, void *);
124 static void pktgen_buf_free(void *);
125 static void pktgen_buf_ref(void *);
126 static void pktgen_buf_send(netmsg_t);
128 static int pktgen_config(struct pktgen *,
129 const struct pktgen_conf *);
130 static int pktgen_start(struct pktgen *, int);
131 static void pktgen_free(struct pktgen *);
132 static void pktgen_ref(struct pktgen *);
133 static void pktgen_pcpu_stop_cb(void *);
134 static void pktgen_mbuf(struct pktgen_buf *, struct mbuf *);
135 static void pktgen_start_ifsq(struct pktgen *,
136 struct ifaltq_subque *);
137 static void pktgen_start_ifsq_handler(netmsg_t);
139 static d_open_t pktgen_open;
140 static d_close_t pktgen_close;
141 static d_ioctl_t pktgen_ioctl;
143 static struct dev_ops pktgen_ops = {
144 { CDEV_NAME, 0, D_MPSAFE },
145 .d_open = pktgen_open,
146 .d_close = pktgen_close,
147 .d_ioctl = pktgen_ioctl,
150 static volatile int pktgen_refcnt;
151 static struct lwkt_token pktgen_tok = LWKT_TOKEN_INITIALIZER(pktgen_token);
153 MALLOC_DECLARE(M_PKTGEN);
154 MALLOC_DEFINE(M_PKTGEN, CDEV_NAME, "Packet generator");
156 DEV_MODULE(pktgen, pktgen_modevent, NULL);
159 pktgen_modevent(module_t mod, int type, void *data)
165 for (i = 0; i < PKTGEN_DEVCNT; ++i) {
166 make_dev(&pktgen_ops, 0, UID_ROOT, GID_WHEEL, 0600,
172 if (pktgen_refcnt > 0)
174 dev_ops_remove_all(&pktgen_ops);
185 pktgen_open(struct dev_open_args *ap)
187 cdev_t dev = ap->a_head.a_dev;
191 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0);
195 lwkt_gettoken(&pktgen_tok);
197 if (dev->si_drv1 != NULL) {
198 lwkt_reltoken(&pktgen_tok);
202 pktg = kmalloc(sizeof(*pktg), M_PKTGEN, M_ZERO | M_WAITOK);
203 for (i = 0; i < ncpus; ++i) {
204 struct pktgen_pcpu *p = &pktg->pktg_pcpu[i];
206 callout_init_mp(&p->pktg_stop);
207 LIST_INIT(&p->pktg_buflist);
211 pktg->pktg_refcnt = 1;
213 atomic_add_int(&pktgen_refcnt, 1);
215 lwkt_reltoken(&pktgen_tok);
220 pktgen_close(struct dev_close_args *ap)
222 cdev_t dev = ap->a_head.a_dev;
223 struct pktgen *pktg = dev->si_drv1;
225 lwkt_gettoken(&pktgen_tok);
227 lwkt_reltoken(&pktgen_tok);
235 pktgen_ioctl(struct dev_ioctl_args *ap __unused)
237 cdev_t dev = ap->a_head.a_dev;
238 caddr_t data = ap->a_data;
239 struct pktgen *pktg = dev->si_drv1;
242 lwkt_gettoken(&pktgen_tok);
246 error = pktgen_start(pktg, 0);
250 error = pktgen_start(pktg, 1);
254 error = pktgen_config(pktg, (const struct pktgen_conf *)data);
262 lwkt_reltoken(&pktgen_tok);
267 pktgen_config(struct pktgen *pktg, const struct pktgen_conf *conf)
269 const struct sockaddr_in *sin;
270 struct sockaddr_in *dst = NULL;
271 const struct sockaddr *sa;
274 int i, error, pktenq;
276 if (pktg->pktg_flags & (PKTG_F_RUNNING | PKTG_F_CONFIG))
279 if (conf->pc_datalen <= 0 ||
280 conf->pc_datalen > ETHERMTU - sizeof(struct udpiphdr))
282 if (conf->pc_duration <= 0)
286 if (sin->sin_family != AF_INET)
287 return EPROTONOSUPPORT;
288 if (sin->sin_port == 0)
291 if (conf->pc_ndst <= 0)
293 dst_size = conf->pc_ndst * sizeof(struct sockaddr_in);
295 dst = kmalloc(dst_size, M_PKTGEN, M_WAITOK | M_NULLOK);
299 error = copyin(conf->pc_dst, dst, dst_size);
303 for (i = 0; i < conf->pc_ndst; ++i) {
305 if (sin->sin_family != AF_INET) {
306 error = EPROTONOSUPPORT;
309 if (sin->sin_port == 0) {
315 ifp = ifunit(conf->pc_ifname);
321 pktenq = conf->pc_pktenq;
322 if (pktenq < 0 || pktenq > ifp->if_snd.altq_maxlen) {
325 } else if (pktenq == 0) {
326 pktenq = (ifp->if_snd.altq_maxlen * 3) / 4;
329 sa = &conf->pc_dst_lladdr;
330 if (sa->sa_family != AF_LINK) {
331 error = EPROTONOSUPPORT;
334 if (sa->sa_len != ETHER_ADDR_LEN) {
335 error = EPROTONOSUPPORT;
338 if (ETHER_IS_MULTICAST(sa->sa_data) ||
339 bcmp(sa->sa_data, ifp->if_broadcastaddr, ifp->if_addrlen) == 0) {
340 error = EADDRNOTAVAIL;
347 pktg->pktg_flags |= PKTG_F_CONFIG;
349 pktg->pktg_duration = conf->pc_duration;
350 pktg->pktg_datalen = conf->pc_datalen;
351 pktg->pktg_pktenq = pktenq;
352 pktg->pktg_ifp = ifp;
353 pktg->pktg_src = conf->pc_src;
354 pktg->pktg_ndst = conf->pc_ndst;
355 KKASSERT(pktg->pktg_dst == NULL);
356 pktg->pktg_dst = dst;
357 bcopy(sa->sa_data, pktg->pktg_dst_lladdr, ETHER_ADDR_LEN);
363 kfree(dst, M_PKTGEN);
368 pktgen_start_ifsq(struct pktgen *pktg, struct ifaltq_subque *ifsq)
370 struct netmsg_pktgen *np;
372 np = kmalloc(sizeof(*np), M_LWKTMSG, M_WAITOK);
373 netmsg_init(&np->np_base, NULL, &netisr_afree_rport, 0,
374 pktgen_start_ifsq_handler);
378 lwkt_sendmsg(netisr_portfn(ifsq_get_cpuid(ifsq)), &np->np_base.lmsg);
382 pktgen_start(struct pktgen *pktg, int mq)
386 if ((pktg->pktg_flags & PKTG_F_CONFIG) == 0)
388 if (pktg->pktg_flags & PKTG_F_RUNNING)
390 pktg->pktg_flags |= PKTG_F_RUNNING;
392 ifq = &pktg->pktg_ifp->if_snd;
395 pktgen_start_ifsq(pktg, ifq_get_subq_default(ifq));
399 for (i = 0; i < ifq->altq_subq_cnt; ++i)
401 for (i = 0; i < ifq->altq_subq_cnt; ++i)
402 pktgen_start_ifsq(pktg, ifq_get_subq(ifq, i));
408 pktgen_start_ifsq_handler(netmsg_t nmsg)
410 struct netmsg_pktgen *np = (struct netmsg_pktgen *)nmsg;
411 struct pktgen *pktg = np->np_pktg;
412 struct ifaltq_subque *ifsq = np->np_ifsq;
414 struct mbuf *m, *head = NULL, **next;
416 struct pktgen_pcpu *p;
417 int cpuid, i, alloc_cnt, keep_cnt;
423 lwkt_replymsg(&np->np_base.lmsg, 0);
425 ifp = pktg->pktg_ifp;
427 cpuid = ifsq_get_cpuid(ifsq);
428 KKASSERT(cpuid == mycpuid);
430 p = &pktg->pktg_pcpu[cpuid];
432 keep_cnt = pktg->pktg_pktenq;
433 alloc_cnt = keep_cnt * 2;
436 * Prefault enough mbuf into mbuf objcache
439 for (i = 0; i < alloc_cnt; ++i) {
440 MGETHDR(m, MB_WAIT, MT_DATA);
442 next = &m->m_nextpkt;
445 for (i = 0; i < alloc_cnt - keep_cnt; ++i) {
451 KKASSERT(head != NULL);
454 * Setup the packets' data
456 ip_len = pktg->pktg_datalen + sizeof(struct udpiphdr);
457 len = ip_len + ETHER_HDR_LEN;
459 psum = htons((u_short)pktg->pktg_datalen + sizeof(struct udphdr) +
461 ulen = htons(pktg->pktg_datalen + sizeof(struct udphdr));
467 const struct sockaddr_in *dst;
468 struct pktgen_buf *pb;
471 struct ether_header *eh;
475 pb = kmalloc(sizeof(*pb), M_PKTGEN, M_WAITOK | M_ZERO);
479 pb->pb_buf = kmalloc(PKTGEN_BUFSZ, M_PKTGEN, M_WAITOK);
481 pb->pb_cpuid = cpuid;
483 netmsg_init(&pb->pb_nmsg, NULL, &netisr_adone_rport, 0,
485 LIST_INSERT_HEAD(&p->pktg_buflist, pb, pb_link);
487 dst = &pktg->pktg_dst[i % pktg->pktg_ndst];
490 m->m_ext.ext_arg = pb;
491 m->m_ext.ext_buf = pb->pb_buf;
492 m->m_ext.ext_free = pktgen_buf_free;
493 m->m_ext.ext_ref = pktgen_buf_ref;
494 m->m_ext.ext_size = PKTGEN_BUFSZ;
496 m->m_data = m->m_ext.ext_buf;
498 m->m_len = m->m_pkthdr.len = len;
500 m->m_data += ETHER_HDR_LEN;
501 m->m_len -= ETHER_HDR_LEN;
502 m->m_pkthdr.len -= ETHER_HDR_LEN;
504 ui = mtod(m, struct udpiphdr *);
505 ui->ui_pr = IPPROTO_UDP;
506 ui->ui_src.s_addr = pktg->pktg_src.sin_addr.s_addr;
507 ui->ui_dst.s_addr = dst->sin_addr.s_addr;
508 ui->ui_sport = pktg->pktg_src.sin_port;
509 ui->ui_dport = dst->sin_port;
511 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
513 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
515 ip = (struct ip *)ui;
517 ip->ip_ttl = 64; /* XXX */
518 ip->ip_tos = 0; /* XXX */
519 ip->ip_vhl = IP_VHL_BORING;
522 ip->ip_id = ip_newid();
526 ip->ip_len = htons(ip->ip_len);
527 ip->ip_sum = in_cksum_hdr(ip);
529 m->m_data -= ETHER_HDR_LEN;
530 m->m_len += ETHER_HDR_LEN;
531 m->m_pkthdr.len += ETHER_HDR_LEN;
533 eh = mtod(m, struct ether_header *);
534 bcopy(pktg->pktg_dst_lladdr, eh->ether_dhost, ETHER_ADDR_LEN);
535 bcopy(IF_LLADDR(ifp), eh->ether_shost, ETHER_ADDR_LEN);
536 eh->ether_type = htons(ETHERTYPE_IP);
538 nextm = m->m_nextpkt;
541 ifq_dispatch(ifp, m, NULL);
546 callout_reset(&p->pktg_stop, pktg->pktg_duration * hz,
547 pktgen_pcpu_stop_cb, p);
553 pktgen_mbuf(struct pktgen_buf *pb, struct mbuf *m)
555 m->m_ext.ext_arg = pb;
556 m->m_ext.ext_buf = pb->pb_buf;
557 m->m_ext.ext_free = pktgen_buf_free;
558 m->m_ext.ext_ref = pktgen_buf_ref;
559 m->m_ext.ext_size = PKTGEN_BUFSZ;
561 m->m_data = m->m_ext.ext_buf;
563 m->m_len = m->m_pkthdr.len = pb->pb_len;
567 pktgen_buf_send(netmsg_t msg)
569 struct pktgen_buf *pb = (struct pktgen_buf *)msg;
572 KKASSERT(&curthread->td_msgport == netisr_portfn(pb->pb_cpuid));
575 lwkt_replymsg(&pb->pb_nmsg.lmsg, 0);
578 MGETHDR(m, MB_WAIT, MT_DATA);
580 ifq_dispatch(pb->pb_ifp, m, NULL);
584 pktgen_buf_free(void *arg)
586 struct pktgen_buf *pb = arg;
589 KKASSERT(pb->pb_inuse > 0);
591 if (atomic_fetchadd_int(&pb->pb_inuse, -1) == 1) {
596 LIST_REMOVE(pb, pb_link);
598 kfree(pb->pb_buf, M_PKTGEN);
606 if (&curthread->td_msgport != netisr_portfn(pb->pb_cpuid)) {
607 KKASSERT(pb->pb_cpuid == mycpuid);
609 KKASSERT(pb->pb_nmsg.lmsg.ms_flags & MSGF_DONE);
610 lwkt_sendmsg(netisr_portfn(pb->pb_cpuid), &pb->pb_nmsg.lmsg);
615 MGETHDR(m, MB_WAIT, MT_DATA);
617 ifsq_enqueue(pb->pb_ifsq, m, NULL);
621 pktgen_buf_ref(void *arg)
623 struct pktgen_buf *pb = arg;
625 panic("%s should never be called\n", __func__);
627 KKASSERT(pb->pb_inuse > 0);
628 atomic_add_int(&pb->pb_inuse, 1);
632 pktgen_free(struct pktgen *pktg)
634 KKASSERT(pktg->pktg_refcnt > 0);
635 if (atomic_fetchadd_int(&pktg->pktg_refcnt, -1) == 1) {
638 if (pktg->pktg_dst != NULL)
639 kfree(pktg->pktg_dst, M_PKTGEN);
641 for (i = 0; i < ncpus; ++i)
642 KKASSERT(LIST_EMPTY(&pktg->pktg_pcpu[i].pktg_buflist));
643 kfree(pktg, M_PKTGEN);
646 KKASSERT(pktgen_refcnt > 0);
647 atomic_subtract_int(&pktgen_refcnt, 1);
651 pktgen_pcpu_stop_cb(void *arg)
653 struct pktgen_pcpu *p = arg;
654 struct pktgen_buf *pb;
657 LIST_FOREACH(pb, &p->pktg_buflist, pb_link)
663 pktgen_ref(struct pktgen *pktg)
665 atomic_add_int(&pktg->pktg_refcnt, 1);
666 atomic_add_int(&pktgen_refcnt, 1);