Annotation of src/sys/netinet/raw_ip.c, Revision 1.30
1.30 ! pk 1: /* $NetBSD: raw_ip.c,v 1.29 1996/05/24 19:03:13 mycroft Exp $ */
1.14 cgd 2:
1.1 cgd 3: /*
1.13 mycroft 4: * Copyright (c) 1982, 1986, 1988, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
1.14 cgd 35: * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94
1.1 cgd 36: */
37:
1.7 mycroft 38: #include <sys/param.h>
39: #include <sys/malloc.h>
40: #include <sys/mbuf.h>
41: #include <sys/socket.h>
42: #include <sys/protosw.h>
43: #include <sys/socketvar.h>
44: #include <sys/errno.h>
1.13 mycroft 45: #include <sys/systm.h>
1.26 mycroft 46: #include <sys/proc.h>
1.1 cgd 47:
1.7 mycroft 48: #include <net/if.h>
49: #include <net/route.h>
1.1 cgd 50:
1.7 mycroft 51: #include <netinet/in.h>
52: #include <netinet/in_systm.h>
53: #include <netinet/ip.h>
54: #include <netinet/ip_var.h>
1.13 mycroft 55: #include <netinet/ip_mroute.h>
1.7 mycroft 56: #include <netinet/in_pcb.h>
1.24 christos 57: #include <netinet/in_var.h>
58:
59: #include <machine/stdarg.h>
1.13 mycroft 60:
1.20 mycroft 61: struct inpcbtable rawcbtable;
1.30 ! pk 62:
! 63: int rip_bind __P((struct inpcb *, struct mbuf *));
! 64: int rip_connect __P((struct inpcb *, struct mbuf *));
! 65: void rip_disconnect __P((struct inpcb *));
1.13 mycroft 66:
67: /*
68: * Nominal space allocated to a raw ip socket.
69: */
70: #define RIPSNDQ 8192
71: #define RIPRCVQ 8192
1.1 cgd 72:
73: /*
74: * Raw interface to IP protocol.
75: */
1.13 mycroft 76:
77: /*
78: * Initialize raw connection block q.
79: */
80: void
81: rip_init()
82: {
83:
1.23 mycroft 84: in_pcbinit(&rawcbtable, 1);
1.13 mycroft 85: }
86:
1.1 cgd 87: struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
88: /*
89: * Setup generic address and protocol structures
90: * for raw_input routine, then pass them along with
91: * mbuf chain.
92: */
1.9 mycroft 93: void
1.24 christos 94: #if __STDC__
95: rip_input(struct mbuf *m, ...)
96: #else
97: rip_input(m, va_alist)
1.1 cgd 98: struct mbuf *m;
1.24 christos 99: va_dcl
100: #endif
1.1 cgd 101: {
102: register struct ip *ip = mtod(m, struct ip *);
1.13 mycroft 103: register struct inpcb *inp;
104: struct socket *last = 0;
1.1 cgd 105:
106: ripsrc.sin_addr = ip->ip_src;
1.21 cgd 107: for (inp = rawcbtable.inpt_queue.cqh_first;
108: inp != (struct inpcb *)&rawcbtable.inpt_queue;
109: inp = inp->inp_queue.cqe_next) {
1.13 mycroft 110: if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != ip->ip_p)
111: continue;
1.27 mycroft 112: if (inp->inp_laddr.s_addr != INADDR_ANY &&
1.16 glass 113: inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
1.13 mycroft 114: continue;
1.27 mycroft 115: if (inp->inp_faddr.s_addr != INADDR_ANY &&
1.16 glass 116: inp->inp_faddr.s_addr != ip->ip_src.s_addr)
1.13 mycroft 117: continue;
118: if (last) {
119: struct mbuf *n;
1.24 christos 120: if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.13 mycroft 121: if (sbappendaddr(&last->so_rcv,
1.19 mycroft 122: sintosa(&ripsrc), n,
123: (struct mbuf *)0) == 0)
1.13 mycroft 124: /* should notify about lost packet */
125: m_freem(n);
126: else
127: sorwakeup(last);
128: }
129: }
130: last = inp->inp_socket;
131: }
132: if (last) {
1.19 mycroft 133: if (sbappendaddr(&last->so_rcv, sintosa(&ripsrc), m,
134: (struct mbuf *)0) == 0)
1.13 mycroft 135: m_freem(m);
136: else
137: sorwakeup(last);
138: } else {
139: m_freem(m);
1.1 cgd 140: ipstat.ips_noproto++;
141: ipstat.ips_delivered--;
142: }
143: }
144:
145: /*
146: * Generate IP header and pass packet to ip_output.
147: * Tack on options user may have setup with control call.
148: */
1.9 mycroft 149: int
1.24 christos 150: #if __STDC__
151: rip_output(struct mbuf *m, ...)
152: #else
153: rip_output(m, va_alist)
154: struct mbuf *m;
155: va_dcl
156: #endif
157: {
1.27 mycroft 158: register struct inpcb *inp;
1.1 cgd 159: register struct ip *ip;
1.10 mycroft 160: struct mbuf *opts;
1.24 christos 161: int flags;
162: va_list ap;
163:
164: va_start(ap, m);
1.27 mycroft 165: inp = va_arg(ap, struct inpcb *);
1.24 christos 166: va_end(ap);
167:
1.27 mycroft 168: flags =
169: (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
1.1 cgd 170:
171: /*
172: * If the user handed us a complete IP packet, use it.
173: * Otherwise, allocate an mbuf for a header and fill it in.
174: */
1.13 mycroft 175: if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.1 cgd 176: M_PREPEND(m, sizeof(struct ip), M_WAIT);
177: ip = mtod(m, struct ip *);
178: ip->ip_tos = 0;
179: ip->ip_off = 0;
1.13 mycroft 180: ip->ip_p = inp->inp_ip.ip_p;
1.1 cgd 181: ip->ip_len = m->m_pkthdr.len;
1.13 mycroft 182: ip->ip_src = inp->inp_laddr;
1.27 mycroft 183: ip->ip_dst = inp->inp_faddr;
1.1 cgd 184: ip->ip_ttl = MAXTTL;
1.13 mycroft 185: opts = inp->inp_options;
186: } else {
187: ip = mtod(m, struct ip *);
188: if (ip->ip_id == 0)
189: ip->ip_id = htons(ip_id++);
190: opts = NULL;
191: /* XXX prevent ip_output from overwriting header fields */
192: flags |= IP_RAWOUTPUT;
193: ipstat.ips_rawout++;
1.1 cgd 194: }
1.13 mycroft 195: return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions));
1.1 cgd 196: }
197:
198: /*
199: * Raw IP socket option processing.
200: */
1.9 mycroft 201: int
1.1 cgd 202: rip_ctloutput(op, so, level, optname, m)
203: int op;
204: struct socket *so;
205: int level, optname;
206: struct mbuf **m;
207: {
1.13 mycroft 208: register struct inpcb *inp = sotoinpcb(so);
1.25 christos 209: #ifdef MROUTING
210: int error;
211: #endif
1.1 cgd 212:
1.15 mycroft 213: if (level != IPPROTO_IP) {
214: if (m != 0 && *m != 0)
215: (void)m_free(*m);
1.13 mycroft 216: return (EINVAL);
1.15 mycroft 217: }
1.1 cgd 218:
1.13 mycroft 219: switch (optname) {
1.1 cgd 220:
1.13 mycroft 221: case IP_HDRINCL:
222: if (op == PRCO_SETOPT || op == PRCO_GETOPT) {
223: if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int))
224: return (EINVAL);
225: if (op == PRCO_SETOPT) {
226: if (*mtod(*m, int *))
227: inp->inp_flags |= INP_HDRINCL;
228: else
229: inp->inp_flags &= ~INP_HDRINCL;
230: (void)m_free(*m);
231: } else {
232: (*m)->m_len = sizeof (int);
233: *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL;
234: }
235: return (0);
236: }
237: break;
1.1 cgd 238:
1.18 mycroft 239: case MRT_INIT:
240: case MRT_DONE:
241: case MRT_ADD_VIF:
242: case MRT_DEL_VIF:
243: case MRT_ADD_MFC:
244: case MRT_DEL_MFC:
245: case MRT_VERSION:
246: case MRT_ASSERT:
1.6 hpeyerl 247: #ifdef MROUTING
1.18 mycroft 248: switch (op) {
249: case PRCO_SETOPT:
250: error = ip_mrouter_set(optname, so, m);
251: break;
252: case PRCO_GETOPT:
253: error = ip_mrouter_get(optname, so, m);
254: break;
255: default:
1.13 mycroft 256: error = EINVAL;
1.18 mycroft 257: break;
258: }
1.13 mycroft 259: return (error);
1.6 hpeyerl 260: #else
1.13 mycroft 261: if (op == PRCO_SETOPT && *m)
1.18 mycroft 262: m_free(*m);
1.13 mycroft 263: return (EOPNOTSUPP);
1.6 hpeyerl 264: #endif
1.1 cgd 265: }
1.13 mycroft 266: return (ip_ctloutput(op, so, level, optname, m));
1.1 cgd 267: }
268:
1.27 mycroft 269: int
1.29 mycroft 270: rip_bind(inp, nam)
271: struct inpcb *inp;
272: struct mbuf *nam;
273: {
274: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
275:
276: if (nam->m_len != sizeof(*addr))
277: return (EINVAL);
278: if (ifnet.tqh_first == 0)
279: return (EADDRNOTAVAIL);
280: if (addr->sin_family != AF_INET &&
281: addr->sin_family != AF_IMPLINK)
282: return (EAFNOSUPPORT);
283: if (addr->sin_addr.s_addr != INADDR_ANY &&
284: ifa_ifwithaddr(sintosa(addr)) == 0)
285: return (EADDRNOTAVAIL);
286: inp->inp_laddr = addr->sin_addr;
287: return (0);
288: }
289:
290: int
1.27 mycroft 291: rip_connect(inp, nam)
292: struct inpcb *inp;
293: struct mbuf *nam;
294: {
295: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
296:
297: if (nam->m_len != sizeof(*addr))
298: return (EINVAL);
299: if (ifnet.tqh_first == 0)
300: return (EADDRNOTAVAIL);
301: if (addr->sin_family != AF_INET &&
302: addr->sin_family != AF_IMPLINK)
303: return (EAFNOSUPPORT);
304: inp->inp_faddr = addr->sin_addr;
305: return (0);
306: }
307:
308: void
309: rip_disconnect(inp)
310: struct inpcb *inp;
311: {
312:
313: inp->inp_faddr.s_addr = INADDR_ANY;
314: }
315:
1.13 mycroft 316: u_long rip_sendspace = RIPSNDQ;
317: u_long rip_recvspace = RIPRCVQ;
318:
1.1 cgd 319: /*ARGSUSED*/
1.9 mycroft 320: int
1.26 mycroft 321: rip_usrreq(so, req, m, nam, control, p)
1.1 cgd 322: register struct socket *so;
323: int req;
1.2 cgd 324: struct mbuf *m, *nam, *control;
1.26 mycroft 325: struct proc *p;
1.1 cgd 326: {
1.27 mycroft 327: register struct inpcb *inp;
328: int s;
1.1 cgd 329: register int error = 0;
1.13 mycroft 330: #ifdef MROUTING
1.6 hpeyerl 331: extern struct socket *ip_mrouter;
332: #endif
1.27 mycroft 333:
1.22 pk 334: if (req == PRU_CONTROL)
335: return (in_control(so, (long)m, (caddr_t)nam,
1.26 mycroft 336: (struct ifnet *)control, p));
1.22 pk 337:
1.27 mycroft 338: s = splsoftnet();
339: inp = sotoinpcb(so);
1.28 mycroft 340: #ifdef DIAGNOSTIC
341: if (req != PRU_SEND && req != PRU_SENDOOB && control)
342: panic("rip_usrreq: unexpected control mbuf");
343: #endif
1.27 mycroft 344: if (inp == 0 && req != PRU_ATTACH) {
1.22 pk 345: error = EINVAL;
346: goto release;
347: }
348:
1.1 cgd 349: switch (req) {
350:
351: case PRU_ATTACH:
1.27 mycroft 352: if (inp != 0) {
353: error = EISCONN;
354: break;
355: }
1.26 mycroft 356: if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13 mycroft 357: error = EACCES;
358: break;
359: }
1.27 mycroft 360: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
361: error = soreserve(so, rip_sendspace, rip_recvspace);
362: if (error)
363: break;
364: }
365: error = in_pcballoc(so, &rawcbtable);
366: if (error)
1.13 mycroft 367: break;
1.27 mycroft 368: inp = sotoinpcb(so);
1.17 cgd 369: inp->inp_ip.ip_p = (long)nam;
1.1 cgd 370: break;
371:
372: case PRU_DETACH:
1.13 mycroft 373: #ifdef MROUTING
1.6 hpeyerl 374: if (so == ip_mrouter)
375: ip_mrouter_done();
376: #endif
1.13 mycroft 377: in_pcbdetach(inp);
1.1 cgd 378: break;
379:
380: case PRU_BIND:
1.29 mycroft 381: error = rip_bind(inp, nam);
1.27 mycroft 382: break;
383:
384: case PRU_LISTEN:
385: error = EOPNOTSUPP;
386: break;
387:
388: case PRU_CONNECT:
389: error = rip_connect(inp, nam);
390: if (error)
1.13 mycroft 391: break;
1.1 cgd 392: soisconnected(so);
1.13 mycroft 393: break;
394:
395: case PRU_CONNECT2:
396: error = EOPNOTSUPP;
397: break;
398:
1.27 mycroft 399: case PRU_DISCONNECT:
400: soisdisconnected(so);
401: rip_disconnect(inp);
402: break;
403:
1.13 mycroft 404: /*
405: * Mark the connection as being incapable of further input.
406: */
407: case PRU_SHUTDOWN:
408: socantsendmore(so);
409: break;
410:
1.27 mycroft 411: case PRU_RCVD:
412: error = EOPNOTSUPP;
413: break;
414:
1.13 mycroft 415: /*
416: * Ship a packet out. The appropriate raw output
417: * routine handles any massaging necessary.
418: */
419: case PRU_SEND:
1.28 mycroft 420: if (control && control->m_len) {
421: m_freem(control);
422: m_freem(m);
423: error = EINVAL;
424: break;
425: }
426: {
1.27 mycroft 427: if (nam) {
428: if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13 mycroft 429: error = EISCONN;
1.28 mycroft 430: goto die;
1.13 mycroft 431: }
1.27 mycroft 432: error = rip_connect(inp, nam);
433: if (error) {
1.28 mycroft 434: die:
1.27 mycroft 435: m_freem(m);
436: break;
437: }
1.13 mycroft 438: } else {
1.27 mycroft 439: if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13 mycroft 440: error = ENOTCONN;
1.28 mycroft 441: goto die;
1.13 mycroft 442: }
443: }
1.27 mycroft 444: error = rip_output(m, inp);
445: if (nam)
446: rip_disconnect(inp);
1.28 mycroft 447: }
1.13 mycroft 448: break;
449:
450: case PRU_SENSE:
451: /*
452: * stat: don't bother with a blocksize.
453: */
1.27 mycroft 454: splx(s);
1.1 cgd 455: return (0);
1.13 mycroft 456:
457: case PRU_RCVOOB:
1.27 mycroft 458: error = EOPNOTSUPP;
459: break;
460:
1.13 mycroft 461: case PRU_SENDOOB:
1.28 mycroft 462: m_freem(control);
1.27 mycroft 463: m_freem(m);
1.13 mycroft 464: error = EOPNOTSUPP;
465: break;
466:
467: case PRU_SOCKADDR:
468: in_setsockaddr(inp, nam);
469: break;
470:
471: case PRU_PEERADDR:
472: in_setpeeraddr(inp, nam);
473: break;
474:
475: default:
476: panic("rip_usrreq");
1.1 cgd 477: }
1.27 mycroft 478:
1.22 pk 479: release:
1.27 mycroft 480: splx(s);
1.1 cgd 481: return (error);
482: }
CVSweb <webmaster@jp.NetBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to raw_ip.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [cvs.NetBSD.org] / src / sys / netinet