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
73 struct netmsg_base pb_nmsg; /* MUST BE THE FIRST */
76 volatile int pb_inuse;
80 struct pktgen *pb_pktg;
81 LIST_ENTRY(pktgen_buf) pb_link;
85 uint32_t pktg_flags; /* PKTG_F_ */
88 struct callout pktg_stop;
92 struct ifnet *pktg_ifp;
94 struct sockaddr_in pktg_src;
96 struct sockaddr_in *pktg_dst;
97 uint8_t pktg_dst_lladdr[ETHER_ADDR_LEN];
99 LIST_HEAD(, pktgen_buf) pktg_buflist;
102 #define PKTG_F_CONFIG 0x1
103 #define PKTG_F_RUNNING 0x4
105 static int pktgen_modevent(module_t, int, void *);
107 static void pktgen_buf_free(void *);
108 static void pktgen_buf_ref(void *);
109 static void pktgen_buf_send(netmsg_t);
111 static int pktgen_config(struct pktgen *,
112 const struct pktgen_conf *);
113 static int pktgen_start(struct pktgen *);
114 static void pktgen_free(struct pktgen *);
115 static void pktgen_stop_cb(void *);
116 static void pktgen_mbuf(struct pktgen_buf *, struct mbuf *);
118 static d_open_t pktgen_open;
119 static d_close_t pktgen_close;
120 static d_ioctl_t pktgen_ioctl;
122 static struct dev_ops pktgen_ops = {
123 { CDEV_NAME, 0, D_MPSAFE },
124 .d_open = pktgen_open,
125 .d_close = pktgen_close,
126 .d_ioctl = pktgen_ioctl,
129 static int pktgen_refcnt;
130 static struct lwkt_token pktgen_tok = LWKT_TOKEN_INITIALIZER(pktgen_token);
132 MALLOC_DECLARE(M_PKTGEN);
133 MALLOC_DEFINE(M_PKTGEN, CDEV_NAME, "Packet generator");
135 DEV_MODULE(pktgen, pktgen_modevent, NULL);
138 pktgen_modevent(module_t mod, int type, void *data)
144 make_dev(&pktgen_ops, 0, UID_ROOT, GID_WHEEL, 0600,
149 if (pktgen_refcnt > 0)
151 dev_ops_remove_all(&pktgen_ops);
162 pktgen_open(struct dev_open_args *ap)
164 cdev_t dev = ap->a_head.a_dev;
168 error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0);
172 lwkt_gettoken(&pktgen_tok);
174 if (dev->si_drv1 != NULL) {
175 lwkt_reltoken(&pktgen_tok);
179 pktg = kmalloc(sizeof(*pktg), M_PKTGEN, M_ZERO | M_WAITOK);
180 callout_init_mp(&pktg->pktg_stop);
181 LIST_INIT(&pktg->pktg_buflist);
184 pktg->pktg_refcnt = 1;
188 lwkt_reltoken(&pktgen_tok);
193 pktgen_close(struct dev_close_args *ap)
195 cdev_t dev = ap->a_head.a_dev;
196 struct pktgen *pktg = dev->si_drv1;
198 lwkt_gettoken(&pktgen_tok);
203 lwkt_reltoken(&pktgen_tok);
209 pktgen_ioctl(struct dev_ioctl_args *ap __unused)
211 cdev_t dev = ap->a_head.a_dev;
212 caddr_t data = ap->a_data;
213 struct pktgen *pktg = dev->si_drv1;
216 lwkt_gettoken(&pktgen_tok);
220 error = pktgen_start(pktg);
224 error = pktgen_config(pktg, (const struct pktgen_conf *)data);
232 lwkt_reltoken(&pktgen_tok);
237 pktgen_config(struct pktgen *pktg, const struct pktgen_conf *conf)
239 const struct sockaddr_in *sin;
240 struct sockaddr_in *dst = NULL;
241 const struct sockaddr *sa;
246 if (pktg->pktg_flags & (PKTG_F_RUNNING | PKTG_F_CONFIG))
249 if (conf->pc_datalen <= 0 ||
250 conf->pc_datalen > ETHERMTU - sizeof(struct udpiphdr))
252 if (conf->pc_duration <= 0)
256 if (sin->sin_family != AF_INET)
257 return EPROTONOSUPPORT;
258 if (sin->sin_port == 0)
261 if (conf->pc_ndst <= 0)
263 dst_size = conf->pc_ndst * sizeof(struct sockaddr_in);
265 dst = kmalloc(dst_size, M_PKTGEN, M_WAITOK | M_NULLOK);
269 error = copyin(conf->pc_dst, dst, dst_size);
273 for (i = 0; i < conf->pc_ndst; ++i) {
275 if (sin->sin_family != AF_INET) {
276 error = EPROTONOSUPPORT;
279 if (sin->sin_port == 0) {
285 ifp = ifunit(conf->pc_ifname);
291 sa = &conf->pc_dst_lladdr;
292 if (sa->sa_family != AF_LINK) {
293 error = EPROTONOSUPPORT;
296 if (sa->sa_len != ETHER_ADDR_LEN) {
297 error = EPROTONOSUPPORT;
300 if (ETHER_IS_MULTICAST(sa->sa_data) ||
301 bcmp(sa->sa_data, ifp->if_broadcastaddr, ifp->if_addrlen) == 0) {
302 error = EADDRNOTAVAIL;
309 pktg->pktg_flags |= PKTG_F_CONFIG;
311 pktg->pktg_duration = conf->pc_duration;
312 pktg->pktg_datalen = conf->pc_datalen;
313 pktg->pktg_ifp = ifp;
314 pktg->pktg_src = conf->pc_src;
315 pktg->pktg_ndst = conf->pc_ndst;
316 KKASSERT(pktg->pktg_dst == NULL);
317 pktg->pktg_dst = dst;
318 bcopy(sa->sa_data, pktg->pktg_dst_lladdr, ETHER_ADDR_LEN);
324 kfree(dst, M_PKTGEN);
329 pktgen_start(struct pktgen *pktg)
331 struct mbuf *m, *head = NULL, **next;
333 int cpuid, orig_cpuid, i, alloc_cnt, keep_cnt;
338 if ((pktg->pktg_flags & PKTG_F_CONFIG) == 0)
340 if (pktg->pktg_flags & PKTG_F_RUNNING)
342 pktg->pktg_flags |= PKTG_F_RUNNING;
344 ifp = pktg->pktg_ifp;
346 orig_cpuid = mycpuid;
347 cpuid = ifp->if_start_cpuid(ifp);
348 if (cpuid != orig_cpuid)
349 lwkt_migratecpu(cpuid);
351 alloc_cnt = ifp->if_snd.ifq_maxlen * 2;
352 keep_cnt = (ifp->if_snd.ifq_maxlen * 7) / 8;
355 * Prefault enough mbuf into mbuf objcache
358 for (i = 0; i < alloc_cnt; ++i) {
359 MGETHDR(m, MB_WAIT, MT_DATA);
361 next = &m->m_nextpkt;
364 for (i = 0; i < alloc_cnt - keep_cnt; ++i) {
370 KKASSERT(head != NULL);
373 * Setup the packets' data
375 ip_len = pktg->pktg_datalen + sizeof(struct udpiphdr);
376 len = ip_len + ETHER_HDR_LEN;
378 psum = htons((u_short)pktg->pktg_datalen + sizeof(struct udphdr) +
380 ulen = htons(pktg->pktg_datalen + sizeof(struct udphdr));
386 const struct sockaddr_in *dst;
387 struct pktgen_buf *pb;
390 struct ether_header *eh;
395 pb = kmalloc(sizeof(*pb), M_PKTGEN, M_WAITOK | M_ZERO);
398 pb->pb_buf = kmalloc(PKTGEN_BUFSZ, M_PKTGEN, M_WAITOK);
400 pb->pb_cpuid = cpuid;
402 netmsg_init(&pb->pb_nmsg, NULL, &netisr_adone_rport, 0,
404 LIST_INSERT_HEAD(&pktg->pktg_buflist, pb, pb_link);
406 dst = &pktg->pktg_dst[i % pktg->pktg_ndst];
409 m->m_ext.ext_arg = pb;
410 m->m_ext.ext_buf = pb->pb_buf;
411 m->m_ext.ext_free = pktgen_buf_free;
412 m->m_ext.ext_ref = pktgen_buf_ref;
413 m->m_ext.ext_size = PKTGEN_BUFSZ;
415 m->m_data = m->m_ext.ext_buf;
417 m->m_len = m->m_pkthdr.len = len;
419 m->m_data += ETHER_HDR_LEN;
420 m->m_len -= ETHER_HDR_LEN;
421 m->m_pkthdr.len -= ETHER_HDR_LEN;
423 ui = mtod(m, struct udpiphdr *);
424 ui->ui_pr = IPPROTO_UDP;
425 ui->ui_src.s_addr = pktg->pktg_src.sin_addr.s_addr;
426 ui->ui_dst.s_addr = dst->sin_addr.s_addr;
427 ui->ui_sport = pktg->pktg_src.sin_port;
428 ui->ui_dport = dst->sin_port;
430 ui->ui_sum = in_pseudo(ui->ui_src.s_addr, ui->ui_dst.s_addr,
432 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum);
434 ip = (struct ip *)ui;
436 ip->ip_ttl = 64; /* XXX */
437 ip->ip_tos = 0; /* XXX */
438 ip->ip_vhl = IP_VHL_BORING;
441 ip->ip_id = ip_newid();
445 ip->ip_len = htons(ip->ip_len);
446 ip->ip_sum = in_cksum_hdr(ip);
448 m->m_data -= ETHER_HDR_LEN;
449 m->m_len += ETHER_HDR_LEN;
450 m->m_pkthdr.len += ETHER_HDR_LEN;
452 eh = mtod(m, struct ether_header *);
453 bcopy(pktg->pktg_dst_lladdr, eh->ether_dhost, ETHER_ADDR_LEN);
454 bcopy(IF_LLADDR(ifp), eh->ether_shost, ETHER_ADDR_LEN);
455 eh->ether_type = htons(ETHERTYPE_IP);
457 nextm = m->m_nextpkt;
460 ifq_dispatch(ifp, m, NULL);
465 callout_reset(&pktg->pktg_stop, pktg->pktg_duration * hz,
466 pktgen_stop_cb, pktg);
468 if (cpuid != orig_cpuid)
469 lwkt_migratecpu(orig_cpuid);
475 pktgen_mbuf(struct pktgen_buf *pb, struct mbuf *m)
477 m->m_ext.ext_arg = pb;
478 m->m_ext.ext_buf = pb->pb_buf;
479 m->m_ext.ext_free = pktgen_buf_free;
480 m->m_ext.ext_ref = pktgen_buf_ref;
481 m->m_ext.ext_size = PKTGEN_BUFSZ;
483 m->m_data = m->m_ext.ext_buf;
485 m->m_len = m->m_pkthdr.len = pb->pb_len;
489 pktgen_buf_send(netmsg_t msg)
491 struct pktgen_buf *pb = (struct pktgen_buf *)msg;
494 KKASSERT(&curthread->td_msgport == netisr_portfn(pb->pb_cpuid));
497 lwkt_replymsg(&pb->pb_nmsg.lmsg, 0);
500 MGETHDR(m, MB_WAIT, MT_DATA);
502 ifq_dispatch(pb->pb_ifp, m, NULL);
506 pktgen_buf_free(void *arg)
508 struct pktgen_buf *pb = arg;
511 KKASSERT(pb->pb_inuse > 0);
513 if (atomic_fetchadd_int(&pb->pb_inuse, -1) == 1) {
516 lwkt_gettoken(&pktgen_tok);
519 LIST_REMOVE(pb, pb_link);
520 kfree(pb->pb_buf, M_PKTGEN);
525 lwkt_reltoken(&pktgen_tok);
530 if (&curthread->td_msgport != netisr_portfn(pb->pb_cpuid)) {
531 KKASSERT(pb->pb_cpuid == mycpuid);
533 KKASSERT(pb->pb_nmsg.lmsg.ms_flags & MSGF_DONE);
534 lwkt_sendmsg(netisr_portfn(pb->pb_cpuid), &pb->pb_nmsg.lmsg);
539 MGETHDR(m, MB_WAIT, MT_DATA);
541 ifq_enqueue(&pb->pb_ifp->if_snd, m, NULL);
545 pktgen_buf_ref(void *arg)
547 struct pktgen_buf *pb = arg;
549 panic("%s should never be called\n", __func__);
551 KKASSERT(pb->pb_inuse > 0);
552 atomic_add_int(&pb->pb_inuse, 1);
556 pktgen_free(struct pktgen *pktg)
558 KKASSERT(pktg->pktg_refcnt > 0);
559 if (--pktg->pktg_refcnt == 0) {
560 if (pktg->pktg_dst != NULL)
561 kfree(pktg->pktg_dst, M_PKTGEN);
562 KKASSERT(LIST_EMPTY(&pktg->pktg_buflist));
563 kfree(pktg, M_PKTGEN);
566 KKASSERT(pktgen_refcnt > 0);
571 pktgen_stop_cb(void *arg)
573 struct pktgen *pktg = arg;
574 struct pktgen_buf *pb;
576 lwkt_gettoken(&pktgen_tok);
577 LIST_FOREACH(pb, &pktg->pktg_buflist, pb_link)
579 lwkt_reltoken(&pktgen_tok);