2 * SPDX-License-Identifier: BSD-2-Clause
5 * Copyright (c) 1999-2001, Vitaly V Belekhov
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/param.h>
32 #include <sys/eventhandler.h>
33 #include <sys/systm.h>
34 #include <sys/errno.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
38 #include <sys/errno.h>
40 #include <sys/sockio.h>
41 #include <sys/socket.h>
42 #include <sys/syslog.h>
45 #include <net/if_var.h>
46 #include <net/if_media.h>
47 #include <net/if_private.h>
48 #include <net/if_types.h>
49 #include <net/netisr.h>
50 #include <net/route.h>
53 #include <netgraph/ng_message.h>
54 #include <netgraph/netgraph.h>
55 #include <netgraph/ng_parse.h>
56 #include <netgraph/ng_eiface.h>
59 #include <net/ethernet.h>
60 #include <net/if_arp.h>
62 static const struct ng_cmdlist ng_eiface_cmdlist[] = {
65 NGM_EIFACE_GET_IFNAME,
74 &ng_parse_enaddr_type,
80 /* Node private data */
81 struct ng_eiface_private {
82 struct ifnet *ifp; /* per-interface network data */
83 struct ifmedia media; /* (fake) media information */
84 int link_status; /* fake */
85 int unit; /* Interface unit number */
86 node_p node; /* Our netgraph node */
87 hook_p ether; /* Hook for ethernet stream */
89 typedef struct ng_eiface_private *priv_p;
91 /* Interface methods */
92 static void ng_eiface_init(void *xsc);
93 static void ng_eiface_start(struct ifnet *ifp);
94 static int ng_eiface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
96 static void ng_eiface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
99 /* Netgraph methods */
100 static int ng_eiface_mod_event(module_t, int, void *);
101 static ng_constructor_t ng_eiface_constructor;
102 static ng_rcvmsg_t ng_eiface_rcvmsg;
103 static ng_shutdown_t ng_eiface_rmnode;
104 static ng_newhook_t ng_eiface_newhook;
105 static ng_rcvdata_t ng_eiface_rcvdata;
106 static ng_disconnect_t ng_eiface_disconnect;
108 /* Node type descriptor */
109 static struct ng_type typestruct = {
110 .version = NG_ABI_VERSION,
111 .name = NG_EIFACE_NODE_TYPE,
112 .mod_event = ng_eiface_mod_event,
113 .constructor = ng_eiface_constructor,
114 .rcvmsg = ng_eiface_rcvmsg,
115 .shutdown = ng_eiface_rmnode,
116 .newhook = ng_eiface_newhook,
117 .rcvdata = ng_eiface_rcvdata,
118 .disconnect = ng_eiface_disconnect,
119 .cmdlist = ng_eiface_cmdlist
121 NETGRAPH_INIT(eiface, &typestruct);
123 VNET_DEFINE_STATIC(struct unrhdr *, ng_eiface_unit);
124 #define V_ng_eiface_unit VNET(ng_eiface_unit)
126 /************************************************************************
128 ************************************************************************/
131 * Process an ioctl for the virtual interface
134 ng_eiface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
136 const priv_p priv = (priv_p)ifp->if_softc;
137 struct ifreq *const ifr = (struct ifreq *)data;
141 ng_eiface_print_ioctl(ifp, command, data);
144 /* These two are mostly handled at a higher layer */
146 error = ether_ioctl(ifp, command, data);
154 * If the interface is marked up and stopped, then start it.
155 * If it is marked down and running, then stop it.
157 if (ifp->if_flags & IFF_UP) {
158 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
159 ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE);
160 ifp->if_drv_flags |= IFF_DRV_RUNNING;
163 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
164 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING |
169 /* Set the interface MTU */
171 if (ifr->ifr_mtu > NG_EIFACE_MTU_MAX ||
172 ifr->ifr_mtu < NG_EIFACE_MTU_MIN)
175 ifp->if_mtu = ifr->ifr_mtu;
178 /* (Fake) media type manipulation */
181 error = ifmedia_ioctl(ifp, ifr, &priv->media, command);
184 /* Stuff that's not supported */
201 ng_eiface_init(void *xsc)
204 struct ifnet *ifp = sc->ifp;
206 ifp->if_drv_flags |= IFF_DRV_RUNNING;
207 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
211 * We simply relay the packet to the "ether" hook, if it is connected.
212 * We have been through the netgraph locking and are guaranteed to
213 * be the only code running in this node at this time.
216 ng_eiface_start2(node_p node, hook_p hook, void *arg1, int arg2)
218 struct ifnet *ifp = arg1;
219 const priv_p priv = (priv_p)ifp->if_softc;
223 /* Check interface flags */
225 if (!((ifp->if_flags & IFF_UP) &&
226 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
231 * Grab a packet to transmit.
233 IF_DEQUEUE(&ifp->if_snd, m);
235 /* If there's nothing to send, break. */
239 /* Peel the mbuf off any stale tags */
240 m_tag_delete_chain(m, NULL);
243 * Berkeley packet filter.
244 * Pass packet to bpf if there is a listener.
245 * XXX is this safe? locking?
249 if (ifp->if_flags & IFF_MONITOR) {
250 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
256 * Send packet; if hook is not connected, mbuf will get
259 NG_OUTBOUND_THREAD_REF();
260 CURVNET_SET_QUIET(priv->node->nd_vnet);
261 NG_SEND_DATA_ONLY(error, priv->ether, m);
263 NG_OUTBOUND_THREAD_UNREF();
267 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
269 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
272 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
278 * This routine is called to deliver a packet out the interface.
279 * We simply queue the netgraph version to be called when netgraph locking
280 * allows it to happen.
281 * Until we know what the rest of the networking code is doing for
282 * locking, we don't know how we will interact with it.
283 * Take comfort from the fact that the ifnet struct is part of our
284 * private info and can't go away while we are queued.
285 * [Though we don't know it is still there now....]
286 * it is possible we don't gain anything from this because
287 * we would like to get the mbuf and queue it as data
288 * somehow, but we can't and if we did would we solve anything?
291 ng_eiface_start(struct ifnet *ifp)
293 const priv_p priv = (priv_p)ifp->if_softc;
295 /* Don't do anything if output is active */
296 if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
299 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
301 if (ng_send_fn(priv->node, NULL, &ng_eiface_start2, ifp, 0) != 0)
302 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
307 * Display an ioctl to the virtual interface
311 ng_eiface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
315 switch (command & IOC_DIRMASK) {
331 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
336 IOCPARM_LEN(command));
344 ng_eiface_mediachange(struct ifnet *ifp)
346 const priv_p priv = (priv_p)ifp->if_softc;
347 struct ifmedia *ifm = &priv->media;
349 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
351 if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO)
352 ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_1000_T);
354 ifp->if_baudrate = ifmedia_baudrate(ifm->ifm_media);
360 ng_eiface_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
362 const priv_p priv = (priv_p)ifp->if_softc;
363 struct ifmedia *ifm = &priv->media;
365 if (ifm->ifm_cur->ifm_media == (IFM_ETHER | IFM_AUTO) &&
366 (priv->link_status & IFM_ACTIVE))
367 ifmr->ifm_active = IFM_ETHER | IFM_1000_T | IFM_FDX;
369 ifmr->ifm_active = ifm->ifm_cur->ifm_media;
370 ifmr->ifm_status = priv->link_status;
375 /************************************************************************
377 ************************************************************************/
380 * Constructor for a node
383 ng_eiface_constructor(node_p node)
387 struct ether_addr eaddr;
389 /* Allocate node and interface private structures */
390 priv = malloc(sizeof(*priv), M_NETGRAPH, M_WAITOK | M_ZERO);
392 ifp = priv->ifp = if_alloc(IFT_ETHER);
394 free(priv, M_NETGRAPH);
398 /* Link them together */
399 ifp->if_softc = priv;
401 /* Get an interface unit number */
402 priv->unit = alloc_unr(V_ng_eiface_unit);
404 /* Link together node and private info */
405 NG_NODE_SET_PRIVATE(node, priv);
408 /* Initialize interface structure */
409 if_initname(ifp, NG_EIFACE_EIFACE_NAME, priv->unit);
410 ifp->if_init = ng_eiface_init;
411 ifp->if_output = ether_output;
412 ifp->if_start = ng_eiface_start;
413 ifp->if_ioctl = ng_eiface_ioctl;
414 ifp->if_snd.ifq_maxlen = ifqmaxlen;
415 ifp->if_flags = (IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
416 ifp->if_capabilities = IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU;
417 ifp->if_capenable = IFCAP_VLAN_MTU | IFCAP_JUMBO_MTU;
418 ifmedia_init(&priv->media, 0, ng_eiface_mediachange,
419 ng_eiface_mediastatus);
420 ifmedia_add(&priv->media, IFM_ETHER | IFM_10_T, 0, NULL);
421 ifmedia_add(&priv->media, IFM_ETHER | IFM_10_T | IFM_FDX, 0, NULL);
422 ifmedia_add(&priv->media, IFM_ETHER | IFM_100_TX, 0, NULL);
423 ifmedia_add(&priv->media, IFM_ETHER | IFM_100_TX | IFM_FDX, 0, NULL);
424 ifmedia_add(&priv->media, IFM_ETHER | IFM_1000_T, 0, NULL);
425 ifmedia_add(&priv->media, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
426 ifmedia_add(&priv->media, IFM_ETHER | IFM_10G_T | IFM_FDX, 0, NULL);
427 ifmedia_add(&priv->media, IFM_ETHER | IFM_AUTO, 0, NULL);
428 ifmedia_set(&priv->media, IFM_ETHER | IFM_AUTO);
429 priv->link_status = IFM_AVALID;
431 /* Give this node the same name as the interface (if possible) */
432 if (ng_name_node(node, ifp->if_xname) != 0)
433 log(LOG_WARNING, "%s: can't acquire netgraph name\n",
436 /* Attach the interface */
437 ether_gen_addr(ifp, &eaddr);
438 ether_ifattach(ifp, eaddr.octet);
439 ifp->if_baudrate = ifmedia_baudrate(IFM_ETHER | IFM_1000_T);
446 * Give our ok for a hook to be added
449 ng_eiface_newhook(node_p node, hook_p hook, const char *name)
451 priv_p priv = NG_NODE_PRIVATE(node);
452 struct ifnet *ifp = priv->ifp;
454 if (strcmp(name, NG_EIFACE_HOOK_ETHER))
455 return (EPFNOSUPPORT);
456 if (priv->ether != NULL)
459 NG_HOOK_SET_PRIVATE(hook, &priv->ether);
460 NG_HOOK_SET_TO_INBOUND(hook);
462 priv->link_status |= IFM_ACTIVE;
463 CURVNET_SET_QUIET(ifp->if_vnet);
464 if_link_state_change(ifp, LINK_STATE_UP);
471 * Receive a control message
474 ng_eiface_rcvmsg(node_p node, item_p item, hook_p lasthook)
476 const priv_p priv = NG_NODE_PRIVATE(node);
477 struct ifnet *const ifp = priv->ifp;
478 struct ng_mesg *resp = NULL;
482 NGI_GET_MSG(item, msg);
483 switch (msg->header.typecookie) {
484 case NGM_EIFACE_COOKIE:
485 switch (msg->header.cmd) {
488 if (msg->header.arglen != ETHER_ADDR_LEN) {
492 error = if_setlladdr(priv->ifp,
493 (u_char *)msg->data, ETHER_ADDR_LEN);
497 case NGM_EIFACE_GET_IFNAME:
498 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
503 strlcpy(resp->data, ifp->if_xname, IFNAMSIZ);
506 case NGM_EIFACE_GET_IFADDRS:
508 struct epoch_tracker et;
513 /* Determine size of response and allocate it */
516 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
517 buflen += SA_SIZE(ifa->ifa_addr);
518 NG_MKRESPONSE(resp, msg, buflen, M_NOWAIT);
527 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
528 const int len = SA_SIZE(ifa->ifa_addr);
531 log(LOG_ERR, "%s: len changed?\n",
535 bcopy(ifa->ifa_addr, ptr, len);
546 } /* end of inner switch() */
548 case NGM_FLOW_COOKIE:
549 CURVNET_SET_QUIET(ifp->if_vnet);
550 switch (msg->header.cmd) {
552 priv->link_status |= IFM_ACTIVE;
553 if_link_state_change(ifp, LINK_STATE_UP);
555 case NGM_LINK_IS_DOWN:
556 priv->link_status &= ~IFM_ACTIVE;
557 if_link_state_change(ifp, LINK_STATE_DOWN);
568 NG_RESPOND_MSG(error, node, item, resp);
574 * Receive data from a hook. Pass the packet to the ether_input routine.
577 ng_eiface_rcvdata(hook_p hook, item_p item)
579 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
580 struct ifnet *const ifp = priv->ifp;
586 if (!((ifp->if_flags & IFF_UP) &&
587 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
592 if (m->m_len < ETHER_HDR_LEN) {
593 m = m_pullup(m, ETHER_HDR_LEN);
598 /* Note receiving interface */
599 m->m_pkthdr.rcvif = ifp;
601 /* Update interface stats */
602 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
604 (*ifp->if_input)(ifp, m);
611 * Shutdown processing.
614 ng_eiface_rmnode(node_p node)
616 const priv_p priv = NG_NODE_PRIVATE(node);
617 struct ifnet *const ifp = priv->ifp;
620 * the ifnet may be in a different vnet than the netgraph node,
621 * hence we have to change the current vnet context here.
623 CURVNET_SET_QUIET(ifp->if_vnet);
625 ifmedia_removeall(&priv->media);
628 free_unr(V_ng_eiface_unit, priv->unit);
629 free(priv, M_NETGRAPH);
630 NG_NODE_SET_PRIVATE(node, NULL);
639 ng_eiface_disconnect(hook_p hook)
641 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
644 priv->link_status &= ~IFM_ACTIVE;
645 CURVNET_SET_QUIET(priv->ifp->if_vnet);
646 if_link_state_change(priv->ifp, LINK_STATE_DOWN);
652 * Handle loading and unloading for this node type.
655 ng_eiface_mod_event(module_t mod, int event, void *data)
671 vnet_ng_eiface_init(const void *unused)
674 V_ng_eiface_unit = new_unrhdr(0, 0xffff, NULL);
676 VNET_SYSINIT(vnet_ng_eiface_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
677 vnet_ng_eiface_init, NULL);
680 vnet_ng_eiface_uninit(const void *unused)
683 delete_unrhdr(V_ng_eiface_unit);
685 VNET_SYSUNINIT(vnet_ng_eiface_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY,
686 vnet_ng_eiface_uninit, NULL);