Annotation of src/sys/netinet/raw_ip.c, Revision 1.40
1.40 ! scottr 1: /* $NetBSD: raw_ip.c,v 1.39 1998/01/05 10:32:01 thorpej 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: *
1.39 thorpej 35: * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
1.1 cgd 36: */
1.40 ! scottr 37:
! 38: #include "opt_mrouting.h"
1.1 cgd 39:
1.7 mycroft 40: #include <sys/param.h>
41: #include <sys/malloc.h>
42: #include <sys/mbuf.h>
43: #include <sys/socket.h>
44: #include <sys/protosw.h>
45: #include <sys/socketvar.h>
46: #include <sys/errno.h>
1.13 mycroft 47: #include <sys/systm.h>
1.26 mycroft 48: #include <sys/proc.h>
1.1 cgd 49:
1.7 mycroft 50: #include <net/if.h>
51: #include <net/route.h>
1.1 cgd 52:
1.7 mycroft 53: #include <netinet/in.h>
54: #include <netinet/in_systm.h>
55: #include <netinet/ip.h>
56: #include <netinet/ip_var.h>
1.13 mycroft 57: #include <netinet/ip_mroute.h>
1.7 mycroft 58: #include <netinet/in_pcb.h>
1.24 christos 59: #include <netinet/in_var.h>
60:
61: #include <machine/stdarg.h>
1.13 mycroft 62:
1.20 mycroft 63: struct inpcbtable rawcbtable;
1.30 pk 64:
65: int rip_bind __P((struct inpcb *, struct mbuf *));
66: int rip_connect __P((struct inpcb *, struct mbuf *));
67: void rip_disconnect __P((struct inpcb *));
1.13 mycroft 68:
69: /*
70: * Nominal space allocated to a raw ip socket.
71: */
72: #define RIPSNDQ 8192
73: #define RIPRCVQ 8192
1.1 cgd 74:
75: /*
76: * Raw interface to IP protocol.
77: */
1.13 mycroft 78:
79: /*
80: * Initialize raw connection block q.
81: */
82: void
83: rip_init()
84: {
85:
1.33 mycroft 86: in_pcbinit(&rawcbtable, 1, 1);
1.13 mycroft 87: }
88:
1.1 cgd 89: /*
90: * Setup generic address and protocol structures
91: * for raw_input routine, then pass them along with
92: * mbuf chain.
93: */
1.9 mycroft 94: void
1.24 christos 95: #if __STDC__
96: rip_input(struct mbuf *m, ...)
97: #else
98: rip_input(m, va_alist)
1.1 cgd 99: struct mbuf *m;
1.24 christos 100: va_dcl
101: #endif
1.1 cgd 102: {
103: register struct ip *ip = mtod(m, struct ip *);
1.13 mycroft 104: register struct inpcb *inp;
1.36 thorpej 105: struct inpcb *last = 0;
106: struct mbuf *opts = 0;
1.32 mycroft 107: struct sockaddr_in ripsrc;
1.1 cgd 108:
1.32 mycroft 109: ripsrc.sin_family = AF_INET;
110: ripsrc.sin_len = sizeof(struct sockaddr_in);
1.1 cgd 111: ripsrc.sin_addr = ip->ip_src;
1.34 mycroft 112: ripsrc.sin_port = 0;
113: bzero((caddr_t)ripsrc.sin_zero, sizeof(ripsrc.sin_zero));
1.32 mycroft 114:
1.21 cgd 115: for (inp = rawcbtable.inpt_queue.cqh_first;
116: inp != (struct inpcb *)&rawcbtable.inpt_queue;
117: inp = inp->inp_queue.cqe_next) {
1.13 mycroft 118: if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != ip->ip_p)
119: continue;
1.32 mycroft 120: if (!in_nullhost(inp->inp_laddr) &&
121: !in_hosteq(inp->inp_laddr, ip->ip_dst))
1.13 mycroft 122: continue;
1.32 mycroft 123: if (!in_nullhost(inp->inp_faddr) &&
124: !in_hosteq(inp->inp_faddr, ip->ip_src))
1.13 mycroft 125: continue;
126: if (last) {
127: struct mbuf *n;
1.24 christos 128: if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.36 thorpej 129: if (last->inp_flags & INP_CONTROLOPTS ||
130: last->inp_socket->so_options & SO_TIMESTAMP)
131: ip_savecontrol(last, &opts, ip, n);
132: if (sbappendaddr(&last->inp_socket->so_rcv,
133: sintosa(&ripsrc), n, opts) == 0) {
1.13 mycroft 134: /* should notify about lost packet */
135: m_freem(n);
1.36 thorpej 136: if (opts)
137: m_freem(opts);
138: } else
139: sorwakeup(last->inp_socket);
1.13 mycroft 140: }
141: }
1.36 thorpej 142: last = inp;
1.13 mycroft 143: }
144: if (last) {
1.36 thorpej 145: if (last->inp_flags & INP_CONTROLOPTS ||
146: last->inp_socket->so_options & SO_TIMESTAMP)
147: ip_savecontrol(last, &opts, ip, m);
148: if (sbappendaddr(&last->inp_socket->so_rcv,
149: sintosa(&ripsrc), m, opts) == 0) {
1.13 mycroft 150: m_freem(m);
1.36 thorpej 151: if (opts)
152: m_freem(opts);
153: } else
154: sorwakeup(last->inp_socket);
1.13 mycroft 155: } else {
156: m_freem(m);
1.1 cgd 157: ipstat.ips_noproto++;
158: ipstat.ips_delivered--;
159: }
160: }
161:
162: /*
163: * Generate IP header and pass packet to ip_output.
164: * Tack on options user may have setup with control call.
165: */
1.9 mycroft 166: int
1.24 christos 167: #if __STDC__
168: rip_output(struct mbuf *m, ...)
169: #else
170: rip_output(m, va_alist)
171: struct mbuf *m;
172: va_dcl
173: #endif
174: {
1.27 mycroft 175: register struct inpcb *inp;
1.1 cgd 176: register struct ip *ip;
1.10 mycroft 177: struct mbuf *opts;
1.24 christos 178: int flags;
179: va_list ap;
180:
181: va_start(ap, m);
1.27 mycroft 182: inp = va_arg(ap, struct inpcb *);
1.24 christos 183: va_end(ap);
184:
1.27 mycroft 185: flags =
1.37 matt 186: (inp->inp_socket->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
187: | IP_RETURNMTU;
1.1 cgd 188:
189: /*
190: * If the user handed us a complete IP packet, use it.
191: * Otherwise, allocate an mbuf for a header and fill it in.
192: */
1.13 mycroft 193: if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.35 thorpej 194: if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
195: m_freem(m);
196: return (EMSGSIZE);
197: }
1.1 cgd 198: M_PREPEND(m, sizeof(struct ip), M_WAIT);
199: ip = mtod(m, struct ip *);
200: ip->ip_tos = 0;
201: ip->ip_off = 0;
1.13 mycroft 202: ip->ip_p = inp->inp_ip.ip_p;
1.1 cgd 203: ip->ip_len = m->m_pkthdr.len;
1.13 mycroft 204: ip->ip_src = inp->inp_laddr;
1.27 mycroft 205: ip->ip_dst = inp->inp_faddr;
1.1 cgd 206: ip->ip_ttl = MAXTTL;
1.13 mycroft 207: opts = inp->inp_options;
208: } else {
1.35 thorpej 209: if (m->m_pkthdr.len > IP_MAXPACKET) {
210: m_freem(m);
211: return (EMSGSIZE);
212: }
1.13 mycroft 213: ip = mtod(m, struct ip *);
1.38 mycroft 214: if (m->m_pkthdr.len != ip->ip_len) {
215: m_freem(m);
216: return (EINVAL);
217: }
1.13 mycroft 218: if (ip->ip_id == 0)
219: ip->ip_id = htons(ip_id++);
220: opts = NULL;
221: /* XXX prevent ip_output from overwriting header fields */
222: flags |= IP_RAWOUTPUT;
223: ipstat.ips_rawout++;
1.1 cgd 224: }
1.37 matt 225: return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions, &inp->inp_errormtu));
1.1 cgd 226: }
227:
228: /*
229: * Raw IP socket option processing.
230: */
1.9 mycroft 231: int
1.1 cgd 232: rip_ctloutput(op, so, level, optname, m)
233: int op;
234: struct socket *so;
235: int level, optname;
236: struct mbuf **m;
237: {
1.13 mycroft 238: register struct inpcb *inp = sotoinpcb(so);
1.31 mycroft 239: int error = 0;
1.1 cgd 240:
1.15 mycroft 241: if (level != IPPROTO_IP) {
1.31 mycroft 242: error = ENOPROTOOPT;
243: if (op == PRCO_SETOPT && *m != 0)
244: (void) m_free(*m);
245: } else switch (op) {
246:
247: case PRCO_SETOPT:
248: switch (optname) {
249: case IP_HDRINCL:
250: if (*m == 0 || (*m)->m_len < sizeof (int))
251: error = EINVAL;
252: else {
1.13 mycroft 253: if (*mtod(*m, int *))
254: inp->inp_flags |= INP_HDRINCL;
255: else
256: inp->inp_flags &= ~INP_HDRINCL;
257: }
1.31 mycroft 258: if (*m != 0)
259: (void) m_free(*m);
260: break;
261:
262: #ifdef MROUTING
263: case MRT_INIT:
264: case MRT_DONE:
265: case MRT_ADD_VIF:
266: case MRT_DEL_VIF:
267: case MRT_ADD_MFC:
268: case MRT_DEL_MFC:
269: case MRT_ASSERT:
270: error = ip_mrouter_set(so, optname, m);
271: break;
272: #endif
273:
274: default:
275: error = ip_ctloutput(op, so, level, optname, m);
276: break;
1.13 mycroft 277: }
278: break;
1.1 cgd 279:
1.31 mycroft 280: case PRCO_GETOPT:
281: switch (optname) {
282: case IP_HDRINCL:
283: *m = m_get(M_WAIT, M_SOOPTS);
284: (*m)->m_len = sizeof (int);
285: *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
286: break;
287:
1.6 hpeyerl 288: #ifdef MROUTING
1.31 mycroft 289: case MRT_VERSION:
290: case MRT_ASSERT:
291: error = ip_mrouter_get(so, optname, m);
1.18 mycroft 292: break;
1.31 mycroft 293: #endif
294:
1.18 mycroft 295: default:
1.31 mycroft 296: error = ip_ctloutput(op, so, level, optname, m);
1.18 mycroft 297: break;
298: }
1.31 mycroft 299: break;
1.1 cgd 300: }
1.31 mycroft 301: return (error);
1.1 cgd 302: }
303:
1.27 mycroft 304: int
1.29 mycroft 305: rip_bind(inp, nam)
306: struct inpcb *inp;
307: struct mbuf *nam;
308: {
309: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
310:
311: if (nam->m_len != sizeof(*addr))
312: return (EINVAL);
313: if (ifnet.tqh_first == 0)
314: return (EADDRNOTAVAIL);
315: if (addr->sin_family != AF_INET &&
316: addr->sin_family != AF_IMPLINK)
317: return (EAFNOSUPPORT);
1.32 mycroft 318: if (!in_nullhost(addr->sin_addr) &&
1.29 mycroft 319: ifa_ifwithaddr(sintosa(addr)) == 0)
320: return (EADDRNOTAVAIL);
321: inp->inp_laddr = addr->sin_addr;
322: return (0);
323: }
324:
325: int
1.27 mycroft 326: rip_connect(inp, nam)
327: struct inpcb *inp;
328: struct mbuf *nam;
329: {
330: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
331:
332: if (nam->m_len != sizeof(*addr))
333: return (EINVAL);
334: if (ifnet.tqh_first == 0)
335: return (EADDRNOTAVAIL);
336: if (addr->sin_family != AF_INET &&
337: addr->sin_family != AF_IMPLINK)
338: return (EAFNOSUPPORT);
339: inp->inp_faddr = addr->sin_addr;
340: return (0);
341: }
342:
343: void
344: rip_disconnect(inp)
345: struct inpcb *inp;
346: {
347:
1.32 mycroft 348: inp->inp_faddr = zeroin_addr;
1.27 mycroft 349: }
350:
1.13 mycroft 351: u_long rip_sendspace = RIPSNDQ;
352: u_long rip_recvspace = RIPRCVQ;
353:
1.1 cgd 354: /*ARGSUSED*/
1.9 mycroft 355: int
1.26 mycroft 356: rip_usrreq(so, req, m, nam, control, p)
1.1 cgd 357: register struct socket *so;
358: int req;
1.2 cgd 359: struct mbuf *m, *nam, *control;
1.26 mycroft 360: struct proc *p;
1.1 cgd 361: {
1.27 mycroft 362: register struct inpcb *inp;
363: int s;
1.1 cgd 364: register int error = 0;
1.13 mycroft 365: #ifdef MROUTING
1.6 hpeyerl 366: extern struct socket *ip_mrouter;
367: #endif
1.27 mycroft 368:
1.22 pk 369: if (req == PRU_CONTROL)
370: return (in_control(so, (long)m, (caddr_t)nam,
1.26 mycroft 371: (struct ifnet *)control, p));
1.22 pk 372:
1.27 mycroft 373: s = splsoftnet();
374: inp = sotoinpcb(so);
1.28 mycroft 375: #ifdef DIAGNOSTIC
376: if (req != PRU_SEND && req != PRU_SENDOOB && control)
377: panic("rip_usrreq: unexpected control mbuf");
378: #endif
1.27 mycroft 379: if (inp == 0 && req != PRU_ATTACH) {
1.22 pk 380: error = EINVAL;
381: goto release;
382: }
383:
1.1 cgd 384: switch (req) {
385:
386: case PRU_ATTACH:
1.27 mycroft 387: if (inp != 0) {
388: error = EISCONN;
389: break;
390: }
1.26 mycroft 391: if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13 mycroft 392: error = EACCES;
393: break;
394: }
1.27 mycroft 395: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
396: error = soreserve(so, rip_sendspace, rip_recvspace);
397: if (error)
398: break;
399: }
400: error = in_pcballoc(so, &rawcbtable);
401: if (error)
1.13 mycroft 402: break;
1.27 mycroft 403: inp = sotoinpcb(so);
1.17 cgd 404: inp->inp_ip.ip_p = (long)nam;
1.1 cgd 405: break;
406:
407: case PRU_DETACH:
1.13 mycroft 408: #ifdef MROUTING
1.6 hpeyerl 409: if (so == ip_mrouter)
410: ip_mrouter_done();
411: #endif
1.13 mycroft 412: in_pcbdetach(inp);
1.1 cgd 413: break;
414:
415: case PRU_BIND:
1.29 mycroft 416: error = rip_bind(inp, nam);
1.27 mycroft 417: break;
418:
419: case PRU_LISTEN:
420: error = EOPNOTSUPP;
421: break;
422:
423: case PRU_CONNECT:
424: error = rip_connect(inp, nam);
425: if (error)
1.13 mycroft 426: break;
1.1 cgd 427: soisconnected(so);
1.13 mycroft 428: break;
429:
430: case PRU_CONNECT2:
431: error = EOPNOTSUPP;
432: break;
433:
1.27 mycroft 434: case PRU_DISCONNECT:
435: soisdisconnected(so);
436: rip_disconnect(inp);
437: break;
438:
1.13 mycroft 439: /*
440: * Mark the connection as being incapable of further input.
441: */
442: case PRU_SHUTDOWN:
443: socantsendmore(so);
444: break;
445:
1.27 mycroft 446: case PRU_RCVD:
447: error = EOPNOTSUPP;
448: break;
449:
1.13 mycroft 450: /*
451: * Ship a packet out. The appropriate raw output
452: * routine handles any massaging necessary.
453: */
454: case PRU_SEND:
1.28 mycroft 455: if (control && control->m_len) {
456: m_freem(control);
457: m_freem(m);
458: error = EINVAL;
459: break;
460: }
461: {
1.27 mycroft 462: if (nam) {
463: if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13 mycroft 464: error = EISCONN;
1.28 mycroft 465: goto die;
1.13 mycroft 466: }
1.27 mycroft 467: error = rip_connect(inp, nam);
468: if (error) {
1.28 mycroft 469: die:
1.27 mycroft 470: m_freem(m);
471: break;
472: }
1.13 mycroft 473: } else {
1.27 mycroft 474: if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13 mycroft 475: error = ENOTCONN;
1.28 mycroft 476: goto die;
1.13 mycroft 477: }
478: }
1.27 mycroft 479: error = rip_output(m, inp);
480: if (nam)
481: rip_disconnect(inp);
1.28 mycroft 482: }
1.13 mycroft 483: break;
484:
485: case PRU_SENSE:
486: /*
487: * stat: don't bother with a blocksize.
488: */
1.27 mycroft 489: splx(s);
1.1 cgd 490: return (0);
1.13 mycroft 491:
492: case PRU_RCVOOB:
1.27 mycroft 493: error = EOPNOTSUPP;
494: break;
495:
1.13 mycroft 496: case PRU_SENDOOB:
1.28 mycroft 497: m_freem(control);
1.27 mycroft 498: m_freem(m);
1.13 mycroft 499: error = EOPNOTSUPP;
500: break;
501:
502: case PRU_SOCKADDR:
503: in_setsockaddr(inp, nam);
504: break;
505:
506: case PRU_PEERADDR:
507: in_setpeeraddr(inp, nam);
508: break;
509:
510: default:
511: panic("rip_usrreq");
1.1 cgd 512: }
1.27 mycroft 513:
1.22 pk 514: release:
1.27 mycroft 515: splx(s);
1.1 cgd 516: return (error);
517: }
CVSweb <webmaster@jp.NetBSD.org>