pdq_ifsubr.c revision 48645 
1/*-
2 * Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. The name of the author may not be used to endorse or promote products
11 *    derived from this software withough specific prior written permission
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 * $Id: pdq_ifsubr.c,v 1.7 1998/02/20 13:11:45 bde Exp $
25 *
26 */
27
28/*
29 * DEC PDQ FDDI Controller; code for BSD derived operating systems
30 *
31 *	This module provide bus independent BSD specific O/S functions.
32 *	(ie. it provides an ifnet interface to the rest of the system)
33 */
34
35
36#include "opt_inet.h"
37
38#include <sys/param.h>
39#include <sys/socket.h>
40#include <sys/sockio.h>
41#if defined(__bsdi__) || defined(__NetBSD__)
42#include <sys/device.h>
43#endif
44
45#include <net/if.h>
46#include <net/if_dl.h>
47
48#include "bpf.h"
49#if NBPF > 0
50#include <net/bpf.h>
51#endif
52
53#if defined(__FreeBSD__)
54#ifdef INET
55#include <netinet/in.h>
56#include <netinet/if_ether.h>
57#endif
58#include <netinet/if_fddi.h>
59#else
60#include <net/if_fddi.h>
61#endif
62
63#if defined(__bsdi__)
64#include <i386/isa/isavar.h>
65#endif
66
67#ifdef NS
68#include <netns/ns.h>
69#include <netns/ns_if.h>
70#endif
71
72#if defined(__FreeBSD__)
73#include <dev/pdq/pdqvar.h>
74#include <dev/pdq/pdqreg.h>
75#else
76#include "pdqvar.h"
77#include "pdqreg.h"
78#endif
79
80#if defined(__bsdi__) && _BSDI_VERSION < 199506 /* XXX */
81static void
82arp_ifinit(
83    struct arpcom *ac,
84    struct ifaddr *ifa)
85{
86    sc->sc_ac.ac_ipaddr = IA_SIN(ifa)->sin_addr;
87    arpwhohas(&sc->sc_ac, &IA_SIN(ifa)->sin_addr);
88#if _BSDI_VERSION >= 199401
89    ifa->ifa_rtrequest = arp_rtrequest;
90    ifa->ifa_flags |= RTF_CLONING;
91#endif
92#endif
93
94
95void
96pdq_ifinit(
97    pdq_softc_t *sc)
98{
99    if (sc->sc_if.if_flags & IFF_UP) {
100	sc->sc_if.if_flags |= IFF_RUNNING;
101	if (sc->sc_if.if_flags & IFF_PROMISC) {
102	    sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
103	} else {
104	    sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
105	}
106	if (sc->sc_if.if_flags & IFF_ALLMULTI) {
107	    sc->sc_pdq->pdq_flags |= PDQ_ALLMULTI;
108	} else {
109	    sc->sc_pdq->pdq_flags &= ~PDQ_ALLMULTI;
110	}
111	if (sc->sc_if.if_flags & IFF_LINK1) {
112	    sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
113	} else {
114	    sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
115	}
116	sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
117	pdq_run(sc->sc_pdq);
118    } else {
119	sc->sc_if.if_flags &= ~IFF_RUNNING;
120	sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
121	pdq_stop(sc->sc_pdq);
122    }
123}
124
125void
126pdq_ifwatchdog(
127    struct ifnet *ifp)
128{
129    /*
130     * No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
131     * seconds.  Remove all queued packets.
132     */
133
134    ifp->if_flags &= ~IFF_OACTIVE;
135    ifp->if_timer = 0;
136    for (;;) {
137	struct mbuf *m;
138	IF_DEQUEUE(&ifp->if_snd, m);
139	if (m == NULL)
140	    return;
141	m_freem(m);
142    }
143}
144
145ifnet_ret_t
146pdq_ifstart(
147    struct ifnet *ifp)
148{
149    pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_ac.ac_if));
150    struct ifqueue *ifq = &ifp->if_snd;
151    struct mbuf *m;
152    int tx = 0;
153
154    if ((ifp->if_flags & IFF_RUNNING) == 0)
155	return;
156
157    if (sc->sc_if.if_timer == 0)
158	sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
159
160    if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
161	sc->sc_if.if_flags |= IFF_OACTIVE;
162	return;
163    }
164    for (;; tx = 1) {
165	IF_DEQUEUE(ifq, m);
166	if (m == NULL)
167	    break;
168
169	if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE) {
170	    ifp->if_flags |= IFF_OACTIVE;
171	    IF_PREPEND(ifq, m);
172	    break;
173	}
174    }
175    if (tx)
176	PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
177}
178
179void
180pdq_os_receive_pdu(
181    pdq_t *pdq,
182    struct mbuf *m,
183    size_t pktlen)
184{
185    pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
186    struct fddi_header *fh = mtod(m, struct fddi_header *);
187
188    sc->sc_if.if_ipackets++;
189#if NBPF > 0
190    if (sc->sc_bpf != NULL)
191	PDQ_BPF_MTAP(sc, m);
192    if ((fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
193	m_freem(m);
194	return;
195    }
196#endif
197
198    m->m_data += sizeof(struct fddi_header);
199    m->m_len  -= sizeof(struct fddi_header);
200    m->m_pkthdr.len = pktlen - sizeof(struct fddi_header);
201    m->m_pkthdr.rcvif = &sc->sc_if;
202    fddi_input(&sc->sc_if, fh, m);
203}
204
205void
206pdq_os_restart_transmitter(
207    pdq_t *pdq)
208{
209    pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
210    sc->sc_if.if_flags &= ~IFF_OACTIVE;
211    if (sc->sc_if.if_snd.ifq_head != NULL) {
212	sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
213	pdq_ifstart(&sc->sc_if);
214    } else {
215	sc->sc_if.if_timer = 0;
216    }
217}
218
219void
220pdq_os_transmit_done(
221    pdq_t *pdq,
222    struct mbuf *m)
223{
224    pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
225#if NBPF > 0
226    if (sc->sc_bpf != NULL)
227	PDQ_BPF_MTAP(sc, m);
228#endif
229    m_freem(m);
230    sc->sc_if.if_opackets++;
231}
232
233void
234pdq_os_addr_fill(
235    pdq_t *pdq,
236    pdq_lanaddr_t *addr,
237    size_t num_addrs)
238{
239    pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
240    struct ifmultiaddr *ifma;
241
242    for (ifma = sc->sc_if.if_multiaddrs.lh_first; ifma && num_addrs > 0;
243	 ifma = ifma->ifma_link.le_next) {
244	    char *mcaddr;
245	    if (ifma->ifma_addr->sa_family != AF_LINK)
246		    continue;
247	    mcaddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
248	    ((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) mcaddr)[0];
249	    ((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) mcaddr)[1];
250	    ((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) mcaddr)[2];
251	    addr++;
252	    num_addrs--;
253    }
254}
255
256int
257pdq_ifioctl(
258    struct ifnet *ifp,
259    ioctl_cmd_t cmd,
260    caddr_t data)
261{
262    pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_ac.ac_if));
263    int s, error = 0;
264
265    s = splimp();
266
267    switch (cmd) {
268	case SIOCSIFADDR: {
269	    struct ifaddr *ifa = (struct ifaddr *)data;
270
271	    ifp->if_flags |= IFF_UP;
272	    switch(ifa->ifa_addr->sa_family) {
273#if defined(INET)
274		case AF_INET: {
275		    pdq_ifinit(sc);
276		    arp_ifinit(&sc->sc_ac, ifa);
277		    break;
278		}
279#endif /* INET */
280
281#if defined(NS)
282		/* This magic copied from if_is.c; I don't use XNS,
283		 * so I have no way of telling if this actually
284		 * works or not.
285		 */
286		case AF_NS: {
287		    struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
288		    if (ns_nullhost(*ina)) {
289			ina->x_host = *(union ns_host *)(sc->sc_ac.ac_enaddr);
290		    } else {
291			ifp->if_flags &= ~IFF_RUNNING;
292			bcopy((caddr_t)ina->x_host.c_host,
293			      (caddr_t)sc->sc_ac.ac_enaddr,
294			      sizeof sc->sc_ac.ac_enaddr);
295		    }
296
297		    pdq_ifinit(sc);
298		    break;
299		}
300#endif /* NS */
301
302		default: {
303		    pdq_ifinit(sc);
304		    break;
305		}
306	    }
307	    break;
308	}
309	case SIOCGIFADDR: {
310	    struct ifreq *ifr = (struct ifreq *)data;
311	    bcopy((caddr_t) sc->sc_ac.ac_enaddr,
312		  (caddr_t) ((struct sockaddr *)&ifr->ifr_data)->sa_data,
313		  6);
314	    break;
315	}
316
317	case SIOCSIFFLAGS: {
318	    pdq_ifinit(sc);
319	    break;
320	}
321
322	case SIOCADDMULTI:
323	case SIOCDELMULTI:
324		/*
325		 * Update multicast listeners
326		 */
327		if (sc->sc_if.if_flags & IFF_RUNNING)
328			pdq_run(sc->sc_pdq);
329		error = 0;
330		break;
331
332#if defined(SIOCSIFMTU)
333#if !defined(ifr_mtu)
334#define ifr_mtu ifr_metric
335#endif
336	case SIOCSIFMTU: {
337	    struct ifreq *ifr = (struct ifreq *)data;
338	    /*
339	     * Set the interface MTU.
340	     */
341	    if (ifr->ifr_mtu > FDDIMTU) {
342		error = EINVAL;
343		break;
344	    }
345	    ifp->if_mtu = ifr->ifr_mtu;
346	    break;
347	}
348#endif /* SIOCSIFMTU */
349
350	default: {
351	    error = EINVAL;
352	    break;
353	}
354    }
355
356    splx(s);
357    return error;
358}
359
360#ifndef IFF_NOTRAILERS
361#define	IFF_NOTRAILERS	0
362#endif
363
364void
365pdq_ifattach(
366    pdq_softc_t *sc,
367    ifnet_ret_t (*ifwatchdog)(int unit))
368{
369    struct ifnet *ifp = &sc->sc_if;
370
371    ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
372
373#if (defined(__FreeBSD__) && BSD >= 199506) || defined(__NetBSD__)
374    ifp->if_watchdog = pdq_ifwatchdog;
375#else
376    ifp->if_watchdog = ifwatchdog;
377#endif
378
379    ifp->if_ioctl = pdq_ifioctl;
380    ifp->if_output = fddi_output;
381    ifp->if_start = pdq_ifstart;
382#warning "Implement fddi_resolvemulti!"
383/*    ifp->if_resolvemulti = ether_resolvemulti; XXX */
384
385    if_attach(ifp);
386    fddi_ifattach(ifp);
387#if NBPF > 0
388    PDQ_BPFATTACH(sc, DLT_FDDI, sizeof(struct fddi_header));
389#endif
390}
391