![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to if_loop.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Net/2] / Net2 / net|
Return to if_loop.c CVS log | Up to [Net/2] / Net2 / net |
1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
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. 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 7.13 (Berkeley) 4/26/91
34: */
35:
36: /*
37: * Loopback interface driver for protocol testing and timing.
38: */
39:
40: #include "param.h"
41: #include "systm.h"
42: #include "mbuf.h"
43: #include "socket.h"
44: #include "errno.h"
45: #include "ioctl.h"
46:
47: #include "../net/if.h"
48: #include "../net/if_types.h"
49: #include "../net/netisr.h"
50: #include "../net/route.h"
51:
52: #include "machine/mtpr.h"
53:
54: #ifdef INET
55: #include "../netinet/in.h"
56: #include "../netinet/in_systm.h"
57: #include "../netinet/in_var.h"
58: #include "../netinet/ip.h"
59: #endif
60:
61: #ifdef NS
62: #include "../netns/ns.h"
63: #include "../netns/ns_if.h"
64: #endif
65:
66: #ifdef ISO
67: #include "../netiso/iso.h"
68: #include "../netiso/iso_var.h"
69: #endif
70:
71: #define LOMTU (1024+512)
72:
73: struct ifnet loif;
74: int looutput(), loioctl();
75:
76: loattach()
77: {
78: register struct ifnet *ifp = &loif;
79:
80: ifp->if_name = "lo";
81: ifp->if_mtu = LOMTU;
82: ifp->if_flags = IFF_LOOPBACK;
83: ifp->if_ioctl = loioctl;
84: ifp->if_output = looutput;
85: ifp->if_type = IFT_LOOP;
86: ifp->if_hdrlen = 0;
87: ifp->if_addrlen = 0;
88: if_attach(ifp);
89: }
90:
91: looutput(ifp, m, dst, rt)
92: struct ifnet *ifp;
93: register struct mbuf *m;
94: struct sockaddr *dst;
95: register struct rtentry *rt;
96: {
97: int s, isr;
98: register struct ifqueue *ifq = 0;
99:
100: if ((m->m_flags & M_PKTHDR) == 0)
101: panic("looutput no HDR");
102: m->m_pkthdr.rcvif = ifp;
103:
104: if (rt && rt->rt_flags & RTF_REJECT) {
105: m_freem(m);
106: return (rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
107: }
108: ifp->if_opackets++;
109: ifp->if_obytes += m->m_pkthdr.len;
110: switch (dst->sa_family) {
111:
112: #ifdef INET
113: case AF_INET:
114: ifq = &ipintrq;
115: isr = NETISR_IP;
116: break;
117: #endif
118: #ifdef NS
119: case AF_NS:
120: ifq = &nsintrq;
121: isr = NETISR_NS;
122: break;
123: #endif
124: #ifdef ISO
125: case AF_ISO:
126: ifq = &clnlintrq;
127: isr = NETISR_ISO;
128: break;
129: #endif
130: default:
131: printf("lo%d: can't handle af%d\n", ifp->if_unit,
132: dst->sa_family);
133: m_freem(m);
134: return (EAFNOSUPPORT);
135: }
136: s = splimp();
137: if (IF_QFULL(ifq)) {
138: IF_DROP(ifq);
139: m_freem(m);
140: splx(s);
141: return (ENOBUFS);
142: }
143: IF_ENQUEUE(ifq, m);
144: schednetisr(isr);
145: ifp->if_ipackets++;
146: ifp->if_ibytes += m->m_pkthdr.len;
147: splx(s);
148: return (0);
149: }
150:
151: /* ARGSUSED */
152: lortrequest(cmd, rt, sa)
153: struct rtentry *rt;
154: struct sockaddr *sa;
155: {
156: if (rt)
157: rt->rt_rmx.rmx_mtu = LOMTU;
158: }
159:
160: /*
161: * Process an ioctl request.
162: */
163: /* ARGSUSED */
164: loioctl(ifp, cmd, data)
165: register struct ifnet *ifp;
166: int cmd;
167: caddr_t data;
168: {
169: register struct ifaddr *ifa;
170: int error = 0;
171:
172: switch (cmd) {
173:
174: case SIOCSIFADDR:
175: ifp->if_flags |= IFF_UP;
176: ifa = (struct ifaddr *)data;
177: if (ifa != 0 && ifa->ifa_addr->sa_family == AF_ISO)
178: ifa->ifa_rtrequest = lortrequest;
179: /*
180: * Everything else is done at a higher level.
181: */
182: break;
183:
184: default:
185: error = EINVAL;
186: }
187: return (error);
188: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.