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>
59 #include <net/netisr2.h>
61 #include <netinet/in.h>
62 #include <netinet/in_pcb.h>
63 #include <netinet/ip.h>
64 #include <netinet/udp_var.h>
68 #define CDEV_NAME "pktg"
70 #define PKTGEN_BUFSZ 2048
73 #define PKTGEN_DEVCNT 4
78 struct netmsg_pktgen {
79 struct netmsg_base np_base;
80 struct pktgen *np_pktg;
81 struct ifaltq_subque *np_ifsq;
85 struct netmsg_base pb_nmsg; /* MUST BE THE FIRST */
90 struct ifaltq_subque *pb_ifsq;
93 struct pktgen *pb_pktg;
94 LIST_ENTRY(pktgen_buf) pb_link;
98 struct callout pktg_stop;
99 LIST_HEAD(, pktgen_buf) pktg_buflist;
103 uint32_t pktg_flags; /* PKTG_F_ */
109 struct ifnet *pktg_ifp;
113 struct sockaddr_in pktg_src;
115 struct sockaddr_in *pktg_dst;
116 uint8_t pktg_dst_lladdr[ETHER_ADDR_LEN];
118 struct pktgen_pcpu pktg_pcpu[MAXCPU];
121 #define PKTG_F_CONFIG 0x1
122 #define PKTG_F_RUNNING 0x4
123 #define PKTG_F_SWITCH_SRCDST 0x8
125 static int pktgen_modevent(module_t, int, void *);
127 static void pktgen_buf_free(void *);
128 static void pktgen_buf_ref(void *);
129 static void pktgen_buf_send(netmsg_t);
131 static int pktgen_config(struct pktgen *,
132 const struct pktgen_conf *);
133 static int pktgen_start(struct pktgen *, int);
134 static void pktgen_free(struct pktgen *);
135 static void pktgen_ref(struct pktgen *);
136 static void pktgen_pcpu_stop_cb(void *);
137 static void pktgen_mbuf(struct pktgen_buf *, struct mbuf *);
138 static void pktgen_start_ifsq(struct pktgen *,
139 struct ifaltq_subque *);
140 static void pktgen_start_ifsq_handler(netmsg_t);
142 static d_open_t pktgen_open;
143 static d_close_t pktgen_close;
144 static d_ioctl_t pktgen_ioctl;
146 static struct dev_ops pktgen_ops = {
147 { CDEV_NAME, 0, D_MPSAFE },
148 .d_open = pktgen_open,
149 .d_close = pktgen_close,
150 .d_ioctl = pktgen_ioctl,
153 static volatile int pktgen_refcnt;
154 static struct lwkt_token pktgen_tok = LWKT_TOKEN_INITIALIZER(pktgen_token);
156 MALLOC_DECLARE(M_PKTGEN);
157 MALLOC_DEFINE(M_PKTGEN, CDEV_NAME, "Packet generator");
159 DEV_MODULE(pktgen, pktgen_modevent, NULL);
162 pktgen_modevent(module_t mod, int type, void *data)
168 for (i = 0; i < PKTGEN_DEVCNT; ++i) {
169 make_dev(&pktgen_ops, 0, UID_ROOT, GID_WHEEL, 0600,
175 if (pktgen_refcnt > 0)
177 dev_ops_remove_all(&pktgen_ops);
188 pktgen_open(struct dev_open_args *ap)
190 cdev_t dev = ap->a_head.a_dev;
194 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0);
198 lwkt_gettoken(&pktgen_tok);
200 if (dev->si_drv1 != NULL) {
201 lwkt_reltoken(&pktgen_tok);
205 pktg = kmalloc(sizeof(*pktg), M_PKTGEN, M_ZERO | M_WAITOK);
206 for (i = 0; i < ncpus; ++i) {
207 struct pktgen_pcpu *p = &pktg->pktg_pcpu[i];
209 callout_init_mp(&p->pktg_stop);
210 LIST_INIT(&p->pktg_buflist);
214 pktg->pktg_refcnt = 1;
216 atomic_add_int(&pktgen_refcnt, 1);
218 lwkt_reltoken(&pktgen_tok);
223 pktgen_close(struct dev_close_args *ap)
225 cdev_t dev = ap->a_head.a_dev;
226 struct pktgen *pktg = dev->si_drv1;
228 lwkt_gettoken(&pktgen_tok);
230 lwkt_reltoken(&pktgen_tok);
238 pktgen_ioctl(struct dev_ioctl_args *ap __unused)
240 cdev_t dev = ap->a_head.a_dev;
241 caddr_t data = ap->a_data;
242 struct pktgen *pktg = dev->si_drv1;
245 lwkt_gettoken(&pktgen_tok);
249 error = pktgen_start(pktg, 0);
253 error = pktgen_start(pktg, 1);
257 error = pktgen_config(pktg, (const struct pktgen_conf *)data);
265 lwkt_reltoken(&pktgen_tok);
270 pktgen_config(struct pktgen *pktg, const struct pktgen_conf *conf)
272 const struct sockaddr_in *sin;
273 struct sockaddr_in *dst = NULL;
274 const struct sockaddr *sa;
277 int i, error, pktenq;
279 if (pktg->pktg_flags & (PKTG_F_RUNNING | PKTG_F_CONFIG))
282 if (conf->pc_datalen <= 0 ||
283 conf->pc_datalen > ETHERMTU - sizeof(struct udpiphdr))
285 if (conf->pc_duration <= 0)
289 if (sin->sin_family != AF_INET)
290 return EPROTONOSUPPORT;
291 if (sin->sin_port == 0)
294 if (conf->pc_ndst <= 0)
296 dst_size = conf->pc_ndst * sizeof(struct sockaddr_in);
298 dst = kmalloc(dst_size, M_PKTGEN, M_WAITOK | M_NULLOK);
302 error = copyin(conf->pc_dst, dst, dst_size);
306 for (i = 0; i < conf->pc_ndst; ++i) {
308 if (sin->sin_family != AF_INET) {
309 error = EPROTONOSUPPORT;
312 if (sin->sin_port == 0) {
318 ifp = ifunit(conf->pc_ifname);
324 pktenq = conf->pc_pktenq;
325 if (pktenq < 0 || pktenq > ifp->if_snd.altq_maxlen) {
328 } else if (pktenq == 0) {
329 pktenq = (ifp->if_snd.altq_maxlen * 3) / 4;
332 sa = &conf->pc_dst_lladdr;
333 if (sa->sa_family != AF_LINK) {
334 error = EPROTONOSUPPORT;
337 if (sa->sa_len != ETHER_ADDR_LEN) {
338 error = EPROTONOSUPPORT;
341 if (ETHER_IS_MULTICAST(sa->sa_data) ||
342 bcmp(sa->sa_data, ifp->if_broadcastaddr, ifp->if_addrlen) == 0) {
343 error = EADDRNOTAVAIL;
350 pktg->pktg_flags |= PKTG_F_CONFIG;
352 if (conf->pc_flags & PKTGEN_FLAG_SWITCH_SRCDST)
353 pktg->pktg_flags |= PKTG_F_SWITCH_SRCDST;
354 pktg->pktg_duration = conf->pc_duration;
355 pktg->pktg_datalen = conf->pc_datalen;
356 pktg->pktg_pktenq = pktenq;
357 pktg->pktg_ifp = ifp;
358 pktg->pktg_src = conf->pc_src;
359 pktg->pktg_ndst = conf->pc_ndst;
360 KKASSERT(pktg->pktg_dst == NULL);
361 pktg->pktg_dst = dst;
362 bcopy(sa->sa_data, pktg->pktg_dst_lladdr, ETHER_ADDR_LEN);
368 kfree(dst, M_PKTGEN);
373 pktgen_start_ifsq(struct pktgen *pktg, struct ifaltq_subque *ifsq)
375 struct netmsg_pktgen *np;
377 np = kmalloc(sizeof(*np), M_LWKTMSG, M_WAITOK);
378 netmsg_init(&np->np_base, NULL, &netisr_afree_rport, 0,
379 pktgen_start_ifsq_handler);
383 lwkt_sendmsg(netisr_cpuport(ifsq_get_cpuid(ifsq)), &np->np_base.lmsg);
387 pktgen_start(struct pktgen *pktg, int mq)
391 if ((pktg->pktg_flags & PKTG_F_CONFIG) == 0)
393 if (pktg->pktg_flags & PKTG_F_RUNNING)
395 pktg->pktg_flags |= PKTG_F_RUNNING;
397 ifq = &pktg->pktg_ifp->if_snd;
400 pktgen_start_ifsq(pktg, ifq_get_subq_default(ifq));
404 for (i = 0; i < ifq->altq_subq_cnt; ++i)
406 for (i = 0; i < ifq->altq_subq_cnt; ++i)
407 pktgen_start_ifsq(pktg, ifq_get_subq(ifq, i));
413 pktgen_start_ifsq_handler(netmsg_t nmsg)
415 struct netmsg_pktgen *np = (struct netmsg_pktgen *)nmsg;
416 struct pktgen *pktg = np->np_pktg;
417 struct ifaltq_subque *ifsq = np->np_ifsq;
419 struct mbuf *m, *head = NULL, **next;
421 struct pktgen_pcpu *p;
422 int cpuid, i, alloc_cnt, keep_cnt;
428 lwkt_replymsg(&np->np_base.lmsg, 0);
430 ifp = pktg->pktg_ifp;
432 cpuid = ifsq_get_cpuid(ifsq);
433 KKASSERT(cpuid == mycpuid);
435 p = &pktg->pktg_pcpu[cpuid];
437 keep_cnt = pktg->pktg_pktenq;
438 alloc_cnt = keep_cnt * 2;
441 * Prefault enough mbuf into mbuf objcache
444 for (i = 0; i < alloc_cnt; ++i) {
445 MGETHDR(m, MB_WAIT, MT_DATA);
447 next = &m->m_nextpkt;
450 for (i = 0; i < alloc_cnt - keep_cnt; ++i) {
456 KKASSERT(head != NULL);
459 * Setup the packets' data
461 ip_len = pktg->pktg_datalen + sizeof(struct udpiphdr);
462 len = ip_len + ETHER_HDR_LEN;
464 psum = htons((u_short)pktg->pktg_datalen + sizeof(struct udphdr) +
466 ulen = htons(pktg->pktg_datalen + sizeof(struct udphdr));
472 const struct sockaddr_in *dst;
473 struct pktgen_buf *pb;
476 struct ether_header *eh;
480 pb = kmalloc(sizeof(*pb), M_PKTGEN, M_WAITOK | M_ZERO);
484 pb->pb_buf = kmalloc(PKTGEN_BUFSZ, M_PKTGEN, M_WAITOK);
486 pb->pb_cpuid = cpuid;
488 netmsg_init(&pb->pb_nmsg, NULL, &netisr_adone_rport, 0,
490 LIST_INSERT_HEAD(&p->pktg_buflist, pb, pb_link);
492 dst = &pktg->pktg_dst[i % pktg->pktg_ndst];
495 m->m_ext.ext_arg = pb;
496 m->m_ext.ext_buf = pb->pb_buf;
497 m->m_ext.ext_free = pktgen_buf_free;
498 m->m_ext.ext_ref = pktgen_buf_ref;
499 m->m_ext.ext_size = PKTGEN_BUFSZ;
501 m->m_data = m->m_ext.ext_buf;
503 m->m_len = m->m_pkthdr.len = len;
505 m->m_data += ETHER_HDR_LEN;
506 m->m_len -= ETHER_HDR_LEN;
507 m->m_pkthdr.len -= ETHER_HDR_LEN;
509 ui = mtod(m, struct udpiphdr *);
510 ui->ui_pr = IPPROTO_UDP;
511 if (pktg->pktg_flags & PKTG_F_SWITCH_SRCDST) {
512 ui->ui_src.s_addr = dst->sin_addr.s_addr;
513 ui->ui_dst.s_addr = pktg->pktg_src.sin_addr.s_addr;
514 ui->ui_sport = dst->sin_port;
515 ui->ui_dport = pktg->pktg_src.sin_port;
517 ui->ui_src.s_addr = pktg->pktg_src.sin_addr.s_addr;
518 ui->ui_dst.s_addr = dst->sin_addr.s_addr;
519 ui->ui_sport = pktg->pktg_src.sin_port;
520 ui->ui_dport = dst->sin_port;
523 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
525 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
527 ip = (struct ip *)ui;
529 ip->ip_ttl = 64; /* XXX */
530 ip->ip_tos = 0; /* XXX */
531 ip->ip_vhl = IP_VHL_BORING;
534 ip->ip_id = ip_newid();
538 ip->ip_len = htons(ip->ip_len);
539 ip->ip_sum = in_cksum_hdr(ip);
541 m->m_data -= ETHER_HDR_LEN;
542 m->m_len += ETHER_HDR_LEN;
543 m->m_pkthdr.len += ETHER_HDR_LEN;
545 eh = mtod(m, struct ether_header *);
546 bcopy(pktg->pktg_dst_lladdr, eh->ether_dhost, ETHER_ADDR_LEN);
547 bcopy(IF_LLADDR(ifp), eh->ether_shost, ETHER_ADDR_LEN);
548 eh->ether_type = htons(ETHERTYPE_IP);
550 nextm = m->m_nextpkt;
553 ifq_dispatch(ifp, m, NULL);
558 callout_reset(&p->pktg_stop, pktg->pktg_duration * hz,
559 pktgen_pcpu_stop_cb, p);
565 pktgen_mbuf(struct pktgen_buf *pb, struct mbuf *m)
567 m->m_ext.ext_arg = pb;
568 m->m_ext.ext_buf = pb->pb_buf;
569 m->m_ext.ext_free = pktgen_buf_free;
570 m->m_ext.ext_ref = pktgen_buf_ref;
571 m->m_ext.ext_size = PKTGEN_BUFSZ;
573 m->m_data = m->m_ext.ext_buf;
575 m->m_len = m->m_pkthdr.len = pb->pb_len;
579 pktgen_buf_send(netmsg_t msg)
581 struct pktgen_buf *pb = (struct pktgen_buf *)msg;
584 KKASSERT(&curthread->td_msgport == netisr_cpuport(pb->pb_cpuid));
587 lwkt_replymsg(&pb->pb_nmsg.lmsg, 0);
590 MGETHDR(m, MB_WAIT, MT_DATA);
592 ifq_dispatch(pb->pb_ifp, m, NULL);
596 pktgen_buf_free(void *arg)
598 struct pktgen_buf *pb = arg;
601 KKASSERT(pb->pb_inuse > 0);
603 if (atomic_fetchadd_int(&pb->pb_inuse, -1) == 1) {
608 LIST_REMOVE(pb, pb_link);
610 kfree(pb->pb_buf, M_PKTGEN);
618 if (&curthread->td_msgport != netisr_cpuport(pb->pb_cpuid)) {
619 KKASSERT(pb->pb_cpuid == mycpuid);
621 KKASSERT(pb->pb_nmsg.lmsg.ms_flags & MSGF_DONE);
622 lwkt_sendmsg(netisr_cpuport(pb->pb_cpuid), &pb->pb_nmsg.lmsg);
627 MGETHDR(m, MB_WAIT, MT_DATA);
629 ifsq_enqueue(pb->pb_ifsq, m, NULL);
633 pktgen_buf_ref(void *arg)
635 struct pktgen_buf *pb = arg;
637 panic("%s should never be called\n", __func__);
639 KKASSERT(pb->pb_inuse > 0);
640 atomic_add_int(&pb->pb_inuse, 1);
644 pktgen_free(struct pktgen *pktg)
646 KKASSERT(pktg->pktg_refcnt > 0);
647 if (atomic_fetchadd_int(&pktg->pktg_refcnt, -1) == 1) {
650 if (pktg->pktg_dst != NULL)
651 kfree(pktg->pktg_dst, M_PKTGEN);
653 for (i = 0; i < ncpus; ++i)
654 KKASSERT(LIST_EMPTY(&pktg->pktg_pcpu[i].pktg_buflist));
655 kfree(pktg, M_PKTGEN);
658 KKASSERT(pktgen_refcnt > 0);
659 atomic_subtract_int(&pktgen_refcnt, 1);
663 pktgen_pcpu_stop_cb(void *arg)
665 struct pktgen_pcpu *p = arg;
666 struct pktgen_buf *pb;
669 LIST_FOREACH(pb, &p->pktg_buflist, pb_link)
675 pktgen_ref(struct pktgen *pktg)
677 atomic_add_int(&pktg->pktg_refcnt, 1);
678 atomic_add_int(&pktgen_refcnt, 1);