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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [net/] [if_loop.c] - Blame information for rev 507

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/*
 * Copyright (c) 1982, 1986, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)if_loop.c   8.1 (Berkeley) 6/10/93
 * $Id: if_loop.c,v 1.2 2001-09-27 12:01:54 chris Exp $
 */
 
/*
 * Loopback interface driver for protocol testing and timing.
 */
#include "loop.h"
#if NLOOP > 0
 
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/time.h>
 
#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/bpf.h>
 
#ifdef  INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif
 
#ifdef IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif
 
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
 
#ifdef ISO
#include <netiso/iso.h>
#include <netiso/iso_var.h>
#endif
 
#ifdef NETATALK
#include <netinet/if_ether.h>
#include <netatalk/at.h>
#include <netatalk/at_var.h>
#endif NETATALK
 
#include "bpfilter.h"
 
static int loioctl __P((struct ifnet *, int, caddr_t));
static void lortrequest __P((int, struct rtentry *, struct sockaddr *));
 
       void rtems_bsdnet_loopattach __P((void *));
PSEUDO_SET(loopattach, if_loop);
 
#ifdef TINY_LOMTU
#define LOMTU   (1024+512)
#else
#define LOMTU   16384
#endif
 
struct  ifnet loif[NLOOP];
 
/* ARGSUSED */
void
rtems_bsdnet_loopattach(dummy)
        void *dummy;
{
        register struct ifnet *ifp;
        register int i = 0;
 
        for (ifp = loif; i < NLOOP; ifp++) {
            ifp->if_name = "lo";
            ifp->if_next = NULL;
            ifp->if_unit = i++;
            ifp->if_mtu = LOMTU;
            ifp->if_flags = IFF_LOOPBACK | IFF_MULTICAST;
            ifp->if_ioctl = loioctl;
            ifp->if_output = looutput;
            ifp->if_type = IFT_LOOP;
            ifp->if_hdrlen = 0;
            ifp->if_addrlen = 0;
            ifp->if_snd.ifq_maxlen = ifqmaxlen;
            if_attach(ifp);
#if NBPFILTER > 0
            bpfattach(ifp, DLT_NULL, sizeof(u_int));
#endif
        }
}
 
int
looutput(ifp, m, dst, rt)
        struct ifnet *ifp;
        register struct mbuf *m;
        struct sockaddr *dst;
        register struct rtentry *rt;
{
        int s, isr;
        register struct ifqueue *ifq = 0;
 
        if ((m->m_flags & M_PKTHDR) == 0)
                panic("looutput no HDR");
#if NBPFILTER > 0
        /* BPF write needs to be handled specially */
        if (dst->sa_family == AF_UNSPEC) {
                dst->sa_family = *(mtod(m, int *));
                m->m_len -= sizeof(int);
                m->m_pkthdr.len -= sizeof(int);
                m->m_data += sizeof(int);
        }
 
        if (ifp->if_bpf) {
                /*
                 * We need to prepend the address family as
                 * a four byte field.  Cons up a dummy header
                 * to pacify bpf.  This is safe because bpf
                 * will only read from the mbuf (i.e., it won't
                 * try to free it or keep a pointer a to it).
                 */
                struct mbuf m0;
                u_int af = dst->sa_family;
 
                m0.m_next = m;
                m0.m_len = 4;
                m0.m_data = (char *)&af;
 
                bpf_mtap(ifp, &m0);
        }
#endif
        m->m_pkthdr.rcvif = ifp;
 
        if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
                m_freem(m);
                return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
                        rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
        }
        ifp->if_opackets++;
        ifp->if_obytes += m->m_pkthdr.len;
        switch (dst->sa_family) {
 
#ifdef INET
        case AF_INET:
                ifq = &ipintrq;
                isr = NETISR_IP;
                break;
#endif
#ifdef IPX
        case AF_IPX:
                ifq = &ipxintrq;
                isr = NETISR_IPX;
                break;
#endif
#ifdef NS
        case AF_NS:
                ifq = &nsintrq;
                isr = NETISR_NS;
                break;
#endif
#ifdef ISO
        case AF_ISO:
                ifq = &clnlintrq;
                isr = NETISR_ISO;
                break;
#endif
#ifdef NETATALK
        case AF_APPLETALK:
                ifq = &atintrq2;
                isr = NETISR_ATALK;
                break;
#endif NETATALK
        default:
                printf("lo%d: can't handle af%d\n", ifp->if_unit,
                        dst->sa_family);
                m_freem(m);
                return (EAFNOSUPPORT);
        }
        s = splimp();
        if (IF_QFULL(ifq)) {
                IF_DROP(ifq);
                m_freem(m);
                splx(s);
                return (ENOBUFS);
        }
        IF_ENQUEUE(ifq, m);
        schednetisr(isr);
        ifp->if_ipackets++;
        ifp->if_ibytes += m->m_pkthdr.len;
        splx(s);
        return (0);
}
 
/* ARGSUSED */
static void
lortrequest(cmd, rt, sa)
        int cmd;
        struct rtentry *rt;
        struct sockaddr *sa;
{
        if (rt) {
                rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */
                /*
                 * For optimal performance, the send and receive buffers
                 * should be at least twice the MTU plus a little more for
                 * overhead.
                 */
                rt->rt_rmx.rmx_recvpipe =
                        rt->rt_rmx.rmx_sendpipe = 3 * LOMTU;
        }
}
 
/*
 * Process an ioctl request.
 */
/* ARGSUSED */
static int
loioctl(ifp, cmd, data)
        register struct ifnet *ifp;
        int cmd;
        caddr_t data;
{
        register struct ifaddr *ifa;
        register struct ifreq *ifr = (struct ifreq *)data;
        register int error = 0;
 
        switch (cmd) {
 
        case SIOCSIFADDR:
                ifp->if_flags |= IFF_UP | IFF_RUNNING;
                ifa = (struct ifaddr *)data;
                ifa->ifa_rtrequest = lortrequest;
                /*
                 * Everything else is done at a higher level.
                 */
                break;
 
        case SIOCADDMULTI:
        case SIOCDELMULTI:
                if (ifr == 0) {
                        error = EAFNOSUPPORT;           /* XXX */
                        break;
                }
                switch (ifr->ifr_addr.sa_family) {
 
#ifdef INET
                case AF_INET:
                        break;
#endif
 
                default:
                        error = EAFNOSUPPORT;
                        break;
                }
                break;
 
        case SIOCSIFMTU:
                ifp->if_mtu = ifr->ifr_mtu;
                break;
 
        default:
                error = EINVAL;
        }
        return (error);
}
#endif /* NLOOP > 0 */

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [net/] [if_loop.c] - Blame information for rev 507

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* Copyright (c) 1982, 1986, 1993`
3			`* The Regents of the University of California. 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. Redistributions in binary form must reproduce the above copyright`
11			`* notice, this list of conditions and the following disclaimer in the`
12			`* documentation and/or other materials provided with the distribution.`
13			`* 3. All advertising materials mentioning features or use of this software`
14			`* must display the following acknowledgement:`
15			`* This product includes software developed by the University of`
16			`* California, Berkeley and its contributors.`
17			`* 4. Neither the name of the University nor the names of its contributors`
18			`* may be used to endorse or promote products derived from this software`
19			`* without specific prior written permission.`
20			`*`
21			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22			`* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE`
23			`* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE`
24			`* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE`
25			`* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL`
26			`* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS`
27			`* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)`
28			`* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT`
29			`* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY`
30			`* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF`
31			`* SUCH DAMAGE.`
32			`*`
33			`* @(#)if_loop.c 8.1 (Berkeley) 6/10/93`
34			`* $Id: if_loop.c,v 1.2 2001-09-27 12:01:54 chris Exp $`
35			`*/`
36
37			`/*`
38			`* Loopback interface driver for protocol testing and timing.`
39			`*/`
40			`#include "loop.h"`
41			`#if NLOOP > 0`
42
43			`#include <sys/param.h>`
44			`#include <sys/systm.h>`
45			`#include <sys/kernel.h>`
46			`#include <sys/mbuf.h>`
47			`#include <sys/socket.h>`
48			`#include <sys/errno.h>`
49			`#include <sys/ioctl.h>`
50			`#include <sys/time.h>`
51
52			`#include <net/if.h>`
53			`#include <net/if_types.h>`
54			`#include <net/netisr.h>`
55			`#include <net/route.h>`
56			`#include <net/bpf.h>`
57
58			`#ifdef INET`
59			`#include <netinet/in.h>`
60			`#include <netinet/in_systm.h>`
61			`#include <netinet/in_var.h>`
62			`#include <netinet/ip.h>`
63			`#endif`
64
65			`#ifdef IPX`
66			`#include <netipx/ipx.h>`
67			`#include <netipx/ipx_if.h>`
68			`#endif`
69
70			`#ifdef NS`
71			`#include <netns/ns.h>`
72			`#include <netns/ns_if.h>`
73			`#endif`
74
75			`#ifdef ISO`
76			`#include <netiso/iso.h>`
77			`#include <netiso/iso_var.h>`
78			`#endif`
79
80			`#ifdef NETATALK`
81			`#include <netinet/if_ether.h>`
82			`#include <netatalk/at.h>`
83			`#include <netatalk/at_var.h>`
84			`#endif NETATALK`
85
86			`#include "bpfilter.h"`
87
88			`static int loioctl __P((struct ifnet *, int, caddr_t));`
89			`static void lortrequest __P((int, struct rtentry , struct sockaddr ));`
90
91			`void rtems_bsdnet_loopattach __P((void *));`
92			`PSEUDO_SET(loopattach, if_loop);`
93
94			`#ifdef TINY_LOMTU`
95			`#define LOMTU (1024+512)`
96			`#else`
97			`#define LOMTU 16384`
98			`#endif`
99
100			`struct ifnet loif[NLOOP];`
101
102			`/* ARGSUSED */`
103			`void`
104			`rtems_bsdnet_loopattach(dummy)`
105			`void *dummy;`
106			`{`
107			`register struct ifnet *ifp;`
108			`register int i = 0;`
109
110			`for (ifp = loif; i < NLOOP; ifp++) {`
111			`ifp->if_name = "lo";`
112			`ifp->if_next = NULL;`
113			`ifp->if_unit = i++;`
114			`ifp->if_mtu = LOMTU;`
115			`ifp->if_flags = IFF_LOOPBACK \| IFF_MULTICAST;`
116			`ifp->if_ioctl = loioctl;`
117			`ifp->if_output = looutput;`
118			`ifp->if_type = IFT_LOOP;`
119			`ifp->if_hdrlen = 0;`
120			`ifp->if_addrlen = 0;`
121			`ifp->if_snd.ifq_maxlen = ifqmaxlen;`
122			`if_attach(ifp);`
123			`#if NBPFILTER > 0`
124			`bpfattach(ifp, DLT_NULL, sizeof(u_int));`
125			`#endif`
126			`}`
127			`}`
128
129			`int`
130			`looutput(ifp, m, dst, rt)`
131			`struct ifnet *ifp;`
132			`register struct mbuf *m;`
133			`struct sockaddr *dst;`
134			`register struct rtentry *rt;`
135			`{`
136			`int s, isr;`
137			`register struct ifqueue *ifq = 0;`
138
139			`if ((m->m_flags & M_PKTHDR) == 0)`
140			`panic("looutput no HDR");`
141			`#if NBPFILTER > 0`
142			`/* BPF write needs to be handled specially */`
143			`if (dst->sa_family == AF_UNSPEC) {`
144			`dst->sa_family = (mtod(m, int ));`
145			`m->m_len -= sizeof(int);`
146			`m->m_pkthdr.len -= sizeof(int);`
147			`m->m_data += sizeof(int);`
148			`}`
149
150			`if (ifp->if_bpf) {`
151			`/*`
152			`* We need to prepend the address family as`
153			`* a four byte field. Cons up a dummy header`
154			`* to pacify bpf. This is safe because bpf`
155			`* will only read from the mbuf (i.e., it won't`
156			`* try to free it or keep a pointer a to it).`
157			`*/`
158			`struct mbuf m0;`
159			`u_int af = dst->sa_family;`
160
161			`m0.m_next = m;`
162			`m0.m_len = 4;`
163			`m0.m_data = (char *)⁡`
164
165			`bpf_mtap(ifp, &m0);`
166			`}`
167			`#endif`
168			`m->m_pkthdr.rcvif = ifp;`
169
170			`if (rt && rt->rt_flags & (RTF_REJECT\|RTF_BLACKHOLE)) {`
171			`m_freem(m);`
172			`return (rt->rt_flags & RTF_BLACKHOLE ? 0 :`
173			`rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);`
174			`}`
175			`ifp->if_opackets++;`
176			`ifp->if_obytes += m->m_pkthdr.len;`
177			`switch (dst->sa_family) {`
178
179			`#ifdef INET`
180			`case AF_INET:`
181			`ifq = &ipintrq;`
182			`isr = NETISR_IP;`
183			`break;`
184			`#endif`
185			`#ifdef IPX`
186			`case AF_IPX:`
187			`ifq = &ipxintrq;`
188			`isr = NETISR_IPX;`
189			`break;`
190			`#endif`
191			`#ifdef NS`
192			`case AF_NS:`
193			`ifq = &nsintrq;`
194			`isr = NETISR_NS;`
195			`break;`
196			`#endif`
197			`#ifdef ISO`
198			`case AF_ISO:`
199			`ifq = &clnlintrq;`
200			`isr = NETISR_ISO;`
201			`break;`
202			`#endif`
203			`#ifdef NETATALK`
204			`case AF_APPLETALK:`
205			`ifq = &atintrq2;`
206			`isr = NETISR_ATALK;`
207			`break;`
208			`#endif NETATALK`
209			`default:`
210			`printf("lo%d: can't handle af%d\n", ifp->if_unit,`
211			`dst->sa_family);`
212			`m_freem(m);`
213			`return (EAFNOSUPPORT);`
214			`}`
215			`s = splimp();`
216			`if (IF_QFULL(ifq)) {`
217			`IF_DROP(ifq);`
218			`m_freem(m);`
219			`splx(s);`
220			`return (ENOBUFS);`
221			`}`
222			`IF_ENQUEUE(ifq, m);`
223			`schednetisr(isr);`
224			`ifp->if_ipackets++;`
225			`ifp->if_ibytes += m->m_pkthdr.len;`
226			`splx(s);`
227			`return (0);`
228			`}`
229
230			`/* ARGSUSED */`
231			`static void`
232			`lortrequest(cmd, rt, sa)`
233			`int cmd;`
234			`struct rtentry *rt;`
235			`struct sockaddr *sa;`
236			`{`
237			`if (rt) {`
238			`rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */`
239			`/*`
240			`* For optimal performance, the send and receive buffers`
241			`* should be at least twice the MTU plus a little more for`
242			`* overhead.`
243			`*/`
244			`rt->rt_rmx.rmx_recvpipe =`
245			`rt->rt_rmx.rmx_sendpipe = 3 * LOMTU;`
246			`}`
247			`}`
248
249			`/*`
250			`* Process an ioctl request.`
251			`*/`
252			`/* ARGSUSED */`
253			`static int`
254			`loioctl(ifp, cmd, data)`
255			`register struct ifnet *ifp;`
256			`int cmd;`
257			`caddr_t data;`
258			`{`
259			`register struct ifaddr *ifa;`
260			`register struct ifreq ifr = (struct ifreq )data;`
261			`register int error = 0;`
262
263			`switch (cmd) {`
264
265			`case SIOCSIFADDR:`
266			`ifp->if_flags \|= IFF_UP \| IFF_RUNNING;`
267			`ifa = (struct ifaddr *)data;`
268			`ifa->ifa_rtrequest = lortrequest;`
269			`/*`
270			`* Everything else is done at a higher level.`
271			`*/`
272			`break;`
273
274			`case SIOCADDMULTI:`
275			`case SIOCDELMULTI:`
276			`if (ifr == 0) {`
277			`error = EAFNOSUPPORT; /* XXX */`
278			`break;`
279			`}`
280			`switch (ifr->ifr_addr.sa_family) {`
281
282			`#ifdef INET`
283			`case AF_INET:`
284			`break;`
285			`#endif`
286
287			`default:`
288			`error = EAFNOSUPPORT;`
289			`break;`
290			`}`
291			`break;`
292
293			`case SIOCSIFMTU:`
294			`ifp->if_mtu = ifr->ifr_mtu;`
295			`break;`
296
297			`default:`
298			`error = EINVAL;`
299			`}`
300			`return (error);`
301			`}`
302			`#endif /* NLOOP > 0 */`