4 * Copyright (c) 1999-2000, Vitaly V Belekhov
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $Id: ng_eiface.c,v 1.14 2000/03/15 12:28:44 vitaly Exp $
30 * $FreeBSD: src/sys/netgraph/ng_eiface.c,v 1.4.2.5 2002/12/17 21:47:48 julian Exp $
31 * $DragonFly: src/sys/netgraph/eiface/ng_eiface.c,v 1.11 2006/12/20 18:14:43 dillon Exp $
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/errno.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
40 #include <sys/errno.h>
41 #include <sys/sockio.h>
42 #include <sys/socket.h>
43 #include <sys/syslog.h>
44 #include <sys/serialize.h>
45 #include <sys/thread2.h>
48 #include <net/if_types.h>
49 #include <net/netisr.h>
52 #include <netgraph/ng_message.h>
53 #include <netgraph/netgraph.h>
54 #include <netgraph/ng_parse.h>
55 #include "ng_eiface.h"
58 #include <net/ethernet.h>
59 #include <net/if_arp.h>
61 static const struct ng_parse_struct_field ng_eiface_par_fields[]
62 = NG_EIFACE_PAR_FIELDS;
64 static const struct ng_parse_type ng_eiface_par_type = {
65 &ng_parse_struct_type,
69 static const struct ng_cmdlist ng_eiface_cmdlist[] = {
80 /* Node private data */
81 struct ng_eiface_private {
82 struct arpcom arpcom; /* per-interface network data */
83 struct ifnet *ifp; /* This interface */
84 node_p node; /* Our netgraph node */
85 hook_p ether; /* Hook for ethernet stream */
86 struct private *next; /* When hung on the free list */
88 typedef struct ng_eiface_private *priv_p;
90 /* Interface methods */
91 static void ng_eiface_init(void *xsc);
92 static void ng_eiface_start(struct ifnet *ifp);
93 static int ng_eiface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
95 static void ng_eiface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
98 /* Netgraph methods */
99 static ng_constructor_t ng_eiface_constructor;
100 static ng_rcvmsg_t ng_eiface_rcvmsg;
101 static ng_shutdown_t ng_eiface_rmnode;
102 static ng_newhook_t ng_eiface_newhook;
103 static ng_rcvdata_t ng_eiface_rcvdata;
104 static ng_connect_t ng_eiface_connect;
105 static ng_disconnect_t ng_eiface_disconnect;
107 /* Node type descriptor */
108 static struct ng_type typestruct = {
112 ng_eiface_constructor,
120 ng_eiface_disconnect,
123 NETGRAPH_INIT(eiface, &typestruct);
125 static char ng_eiface_ifname[] = NG_EIFACE_EIFACE_NAME;
126 static int ng_eiface_next_unit;
128 /************************************************************************
130 ************************************************************************/
133 * Process an ioctl for the virtual interface
136 ng_eiface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
138 struct ifreq *const ifr = (struct ifreq *) data;
142 ng_eiface_print_ioctl(ifp, command, data);
147 /* These two are mostly handled at a higher layer */
149 error = ether_ioctl(ifp, command, data);
157 * If the interface is marked up and stopped, then start it.
158 * If it is marked down and running, then stop it.
160 if (ifr->ifr_flags & IFF_UP) {
161 if (!(ifp->if_flags & IFF_RUNNING)) {
162 ifp->if_flags &= ~(IFF_OACTIVE);
163 ifp->if_flags |= IFF_RUNNING;
166 if (ifp->if_flags & IFF_RUNNING)
167 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
171 /* Set the interface MTU */
173 if (ifr->ifr_mtu > NG_EIFACE_MTU_MAX
174 || ifr->ifr_mtu < NG_EIFACE_MTU_MIN)
177 ifp->if_mtu = ifr->ifr_mtu;
180 /* Stuff that's not supported */
198 ng_eiface_init(void *xsc)
201 struct ifnet *ifp = sc->ifp;
205 ifp->if_flags |= IFF_RUNNING;
206 ifp->if_flags &= ~IFF_OACTIVE;
213 * This routine is called to deliver a packet out the interface.
214 * We simply relay the packet to
215 * the ether hook, if it is connected.
219 ng_eiface_start(struct ifnet *ifp)
221 const priv_p priv = (priv_p) ifp->if_softc;
226 /* Check interface flags */
227 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
230 /* Don't do anything if output is active */
231 if( ifp->if_flags & IFF_OACTIVE )
234 ifp->if_flags |= IFF_OACTIVE;
237 * Grab a packet to transmit.
239 IF_DEQUEUE(&ifp->if_snd, m);
241 /* If there's nothing to send, return. */
244 ifp->if_flags &= ~IFF_OACTIVE;
250 /* Copy length before the mbuf gets invalidated */
251 len = m->m_pkthdr.len;
253 /* Send packet; if hook is not connected, mbuf will get freed. */
254 NG_SEND_DATA(error, priv->ether, m, meta);
258 ifp->if_obytes += len;
262 ifp->if_flags &= ~IFF_OACTIVE;
269 * Display an ioctl to the virtual interface
273 ng_eiface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
277 switch (command & IOC_DIRMASK) {
293 log(LOG_DEBUG, "%s: %s('%c', %d, char[%d])\n",
298 IOCPARM_LEN(command));
302 /************************************************************************
304 ************************************************************************/
307 * Constructor for a node
310 ng_eiface_constructor(node_p *nodep)
317 /* Allocate node and interface private structures */
318 MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_WAITOK);
321 bzero(priv, sizeof(*priv));
323 ifp = &(priv->arpcom.ac_if);
325 /* Link them together */
326 ifp->if_softc = priv;
329 /* Call generic node constructor */
330 if ((error = ng_make_node_common(&typestruct, nodep))) {
331 FREE(priv, M_NETGRAPH);
336 /* Link together node and private info */
337 node->private = priv;
340 /* Initialize interface structure */
341 if_initname(ifp, ng_eiface_ifname, ng_eiface_next_unit++);
342 ifp->if_init = ng_eiface_init;
343 ifp->if_start = ng_eiface_start;
344 ifp->if_ioctl = ng_eiface_ioctl;
345 ifp->if_watchdog = NULL;
346 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
347 ifp->if_flags = (IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST);
349 TAILQ_INIT(&ifp->if_addrhead);
351 /* Give this node name *
352 bzero(ifname, sizeof(ifname));
353 ksprintf(ifname, "if%s", ifp->if_xname);
354 ng_name_node(node, ifname);
357 /* Attach the interface */
358 ether_ifattach(ifp, priv->arpcom.ac_enaddr, NULL);
365 * Give our ok for a hook to be added
368 ng_eiface_newhook(node_p node, hook_p hook, const char *name)
370 priv_p priv = node->private;
372 if (strcmp(name, NG_EIFACE_HOOK_ETHER))
373 return (EPFNOSUPPORT);
374 if (priv->ether != NULL)
377 hook->private = &priv->ether;
383 * Receive a control message
386 ng_eiface_rcvmsg(node_p node, struct ng_mesg *msg,
387 const char *retaddr, struct ng_mesg **rptr)
389 const priv_p priv = node->private;
390 struct ifnet *const ifp = priv->ifp;
391 struct ng_mesg *resp = NULL;
394 switch (msg->header.typecookie) {
395 case NGM_EIFACE_COOKIE:
396 switch (msg->header.cmd) {
400 struct ng_eiface_par *eaddr;
402 if (msg->header.arglen != sizeof(struct ng_eiface_par))
407 eaddr = (struct ng_eiface_par *)(msg->data);
409 priv->arpcom.ac_enaddr[0] = eaddr->oct0;
410 priv->arpcom.ac_enaddr[1] = eaddr->oct1;
411 priv->arpcom.ac_enaddr[2] = eaddr->oct2;
412 priv->arpcom.ac_enaddr[3] = eaddr->oct3;
413 priv->arpcom.ac_enaddr[4] = eaddr->oct4;
414 priv->arpcom.ac_enaddr[5] = eaddr->oct5;
419 case NGM_EIFACE_GET_IFNAME:
421 struct ng_eiface_ifname *arg;
423 NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
428 arg = (struct ng_eiface_ifname *) resp->data;
429 ksprintf(arg->ngif_name,
430 "%s", ifp->if_xname); /* XXX: strings */
434 case NGM_EIFACE_GET_IFADDRS:
440 #define SA_SIZE(s) ((s)->sa_len<sizeof(*(s))? sizeof(*(s)):(s)->sa_len)
442 /* Determine size of response and allocate it */
444 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
445 buflen += SA_SIZE(ifa->ifa_addr);
446 NG_MKRESPONSE(resp, msg, buflen, M_NOWAIT);
454 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
455 const int len = SA_SIZE(ifa->ifa_addr);
458 log(LOG_ERR, "%s: len changed?\n",
462 bcopy(ifa->ifa_addr, ptr, len);
482 FREE(resp, M_NETGRAPH);
483 FREE(msg, M_NETGRAPH);
488 * Recive data from a hook. Pass the packet to the ether_input routine.
491 ng_eiface_rcvdata(hook_p hook, struct mbuf *m, meta_p meta)
493 const priv_p priv = hook->node->private;
494 struct ifnet *const ifp = priv->ifp;
496 struct ether_header *eh;
499 /* Meta-data is end its life here... */
504 printf("ng_eiface: mbuf is null.\n");
508 lwkt_serialize_enter(ifp->if_serializer);
509 if ( !(ifp->if_flags & IFF_UP) ) {
510 lwkt_serialize_exit(ifp->if_serializer);
514 /* Note receiving interface */
515 m->m_pkthdr.rcvif = ifp;
517 /* Update interface stats */
522 ifp->if_input(ifp, m);
523 lwkt_serialize_exit(ifp->if_serializer);
530 * Because the BSD networking code doesn't support the removal of
531 * networking interfaces, iface nodes (once created) are persistent.
532 * So this method breaks all connections and marks the interface
533 * down, but does not remove the node.
536 ng_eiface_rmnode(node_p node)
538 const priv_p priv = node->private;
539 struct ifnet *const ifp = priv->ifp;
542 node->flags &= ~NG_INVALID;
543 lwkt_serialize_enter(ifp->if_serializer);
544 ifp->if_flags &= ~(IFF_UP | IFF_RUNNING | IFF_OACTIVE);
545 lwkt_serialize_exit(ifp->if_serializer);
551 * This is called once we've already connected a new hook to the other node.
552 * It gives us a chance to balk at the last minute.
555 ng_eiface_connect(hook_p hook)
557 /* be really amiable and just say "YUP that's OK by me! " */
565 ng_eiface_disconnect(hook_p hook)
567 const priv_p priv = hook->node->private;