Annotation of src/sys/netinet/raw_ip.c, Revision 1.25.4.2
1.25.4.2! mycroft 1: /* $NetBSD: raw_ip.c,v 1.25.4.1 1996/11/10 21:57:53 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: *
1.14 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>
1.25.4.2! 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;
1.13 mycroft 62:
1.25.4.2! mycroft 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 *));
! 66:
1.13 mycroft 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;
1.25.4.2! 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;
1.25.4.2! 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: {
158: register struct inpcb *inp;
1.25.4.2! mycroft 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);
1.25.4.2! mycroft 165: inp = va_arg(ap, struct inpcb *);
1.24 christos 166: va_end(ap);
167:
1.25.4.2! 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) {
1.25.4.1 thorpej 176: if ((m->m_pkthdr.len + sizeof(struct ip)) > IP_MAXPACKET) {
177: m_freem(m);
178: return (EMSGSIZE);
179: }
1.1 cgd 180: M_PREPEND(m, sizeof(struct ip), M_WAIT);
181: ip = mtod(m, struct ip *);
182: ip->ip_tos = 0;
183: ip->ip_off = 0;
1.13 mycroft 184: ip->ip_p = inp->inp_ip.ip_p;
1.1 cgd 185: ip->ip_len = m->m_pkthdr.len;
1.13 mycroft 186: ip->ip_src = inp->inp_laddr;
1.25.4.2! mycroft 187: ip->ip_dst = inp->inp_faddr;
1.1 cgd 188: ip->ip_ttl = MAXTTL;
1.13 mycroft 189: opts = inp->inp_options;
190: } else {
1.25.4.1 thorpej 191: if (m->m_pkthdr.len > IP_MAXPACKET) {
192: m_freem(m);
193: return (EMSGSIZE);
194: }
1.13 mycroft 195: ip = mtod(m, struct ip *);
196: if (ip->ip_id == 0)
197: ip->ip_id = htons(ip_id++);
198: opts = NULL;
199: /* XXX prevent ip_output from overwriting header fields */
200: flags |= IP_RAWOUTPUT;
201: ipstat.ips_rawout++;
1.1 cgd 202: }
1.13 mycroft 203: return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions));
1.1 cgd 204: }
205:
206: /*
207: * Raw IP socket option processing.
208: */
1.9 mycroft 209: int
1.1 cgd 210: rip_ctloutput(op, so, level, optname, m)
211: int op;
212: struct socket *so;
213: int level, optname;
214: struct mbuf **m;
215: {
1.13 mycroft 216: register struct inpcb *inp = sotoinpcb(so);
1.25.4.2! mycroft 217: int error = 0;
1.1 cgd 218:
1.15 mycroft 219: if (level != IPPROTO_IP) {
1.25.4.2! mycroft 220: error = ENOPROTOOPT;
! 221: if (op == PRCO_SETOPT && *m != 0)
! 222: (void) m_free(*m);
! 223: } else switch (op) {
! 224:
! 225: case PRCO_SETOPT:
! 226: switch (optname) {
! 227: case IP_HDRINCL:
! 228: if (*m == 0 || (*m)->m_len < sizeof (int))
! 229: error = EINVAL;
! 230: else {
1.13 mycroft 231: if (*mtod(*m, int *))
232: inp->inp_flags |= INP_HDRINCL;
233: else
234: inp->inp_flags &= ~INP_HDRINCL;
235: }
1.25.4.2! mycroft 236: if (*m != 0)
! 237: (void) m_free(*m);
! 238: break;
! 239:
! 240: #ifdef MROUTING
! 241: case MRT_INIT:
! 242: case MRT_DONE:
! 243: case MRT_ADD_VIF:
! 244: case MRT_DEL_VIF:
! 245: case MRT_ADD_MFC:
! 246: case MRT_DEL_MFC:
! 247: case MRT_ASSERT:
! 248: error = ip_mrouter_set(so, optname, m);
! 249: break;
! 250: #endif
! 251:
! 252: default:
! 253: error = ip_ctloutput(op, so, level, optname, m);
! 254: break;
1.13 mycroft 255: }
256: break;
1.1 cgd 257:
1.25.4.2! mycroft 258: case PRCO_GETOPT:
! 259: switch (optname) {
! 260: case IP_HDRINCL:
! 261: *m = m_get(M_WAIT, M_SOOPTS);
! 262: (*m)->m_len = sizeof (int);
! 263: *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL ? 1 : 0;
1.18 mycroft 264: break;
1.25.4.2! mycroft 265:
! 266: #ifdef MROUTING
! 267: case MRT_VERSION:
! 268: case MRT_ASSERT:
! 269: error = ip_mrouter_get(so, optname, m);
1.18 mycroft 270: break;
1.25.4.2! mycroft 271: #endif
! 272:
1.18 mycroft 273: default:
1.25.4.2! mycroft 274: error = ip_ctloutput(op, so, level, optname, m);
1.18 mycroft 275: break;
276: }
1.25.4.2! mycroft 277: break;
1.1 cgd 278: }
1.25.4.2! mycroft 279: return (error);
! 280: }
! 281:
! 282: int
! 283: rip_bind(inp, nam)
! 284: struct inpcb *inp;
! 285: struct mbuf *nam;
! 286: {
! 287: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
! 288:
! 289: if (nam->m_len != sizeof(*addr))
! 290: return (EINVAL);
! 291: if (ifnet.tqh_first == 0)
! 292: return (EADDRNOTAVAIL);
! 293: if (addr->sin_family != AF_INET &&
! 294: addr->sin_family != AF_IMPLINK)
! 295: return (EAFNOSUPPORT);
! 296: if (addr->sin_addr.s_addr != INADDR_ANY &&
! 297: ifa_ifwithaddr(sintosa(addr)) == 0)
! 298: return (EADDRNOTAVAIL);
! 299: inp->inp_laddr = addr->sin_addr;
! 300: return (0);
! 301: }
! 302:
! 303: int
! 304: rip_connect(inp, nam)
! 305: struct inpcb *inp;
! 306: struct mbuf *nam;
! 307: {
! 308: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
! 309:
! 310: if (nam->m_len != sizeof(*addr))
! 311: return (EINVAL);
! 312: if (ifnet.tqh_first == 0)
! 313: return (EADDRNOTAVAIL);
! 314: if (addr->sin_family != AF_INET &&
! 315: addr->sin_family != AF_IMPLINK)
! 316: return (EAFNOSUPPORT);
! 317: inp->inp_faddr = addr->sin_addr;
! 318: return (0);
! 319: }
! 320:
! 321: void
! 322: rip_disconnect(inp)
! 323: struct inpcb *inp;
! 324: {
! 325:
! 326: inp->inp_faddr.s_addr = INADDR_ANY;
1.1 cgd 327: }
328:
1.13 mycroft 329: u_long rip_sendspace = RIPSNDQ;
330: u_long rip_recvspace = RIPRCVQ;
331:
1.1 cgd 332: /*ARGSUSED*/
1.9 mycroft 333: int
1.25.4.2! mycroft 334: rip_usrreq(so, req, m, nam, control, p)
1.1 cgd 335: register struct socket *so;
336: int req;
1.2 cgd 337: struct mbuf *m, *nam, *control;
1.25.4.2! mycroft 338: struct proc *p;
1.1 cgd 339: {
1.25.4.2! mycroft 340: register struct inpcb *inp;
! 341: int s;
1.1 cgd 342: register int error = 0;
1.13 mycroft 343: #ifdef MROUTING
1.6 hpeyerl 344: extern struct socket *ip_mrouter;
345: #endif
1.25.4.2! mycroft 346:
1.22 pk 347: if (req == PRU_CONTROL)
348: return (in_control(so, (long)m, (caddr_t)nam,
1.25.4.2! mycroft 349: (struct ifnet *)control, p));
1.22 pk 350:
1.25.4.2! mycroft 351: s = splsoftnet();
! 352: inp = sotoinpcb(so);
! 353: #ifdef DIAGNOSTIC
! 354: if (req != PRU_SEND && req != PRU_SENDOOB && control)
! 355: panic("rip_usrreq: unexpected control mbuf");
! 356: #endif
! 357: if (inp == 0 && req != PRU_ATTACH) {
1.22 pk 358: error = EINVAL;
359: goto release;
360: }
361:
1.1 cgd 362: switch (req) {
363:
364: case PRU_ATTACH:
1.25.4.2! mycroft 365: if (inp != 0) {
! 366: error = EISCONN;
! 367: break;
! 368: }
! 369: if (p == 0 || (error = suser(p->p_ucred, &p->p_acflag))) {
1.13 mycroft 370: error = EACCES;
371: break;
372: }
1.25.4.2! mycroft 373: if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
! 374: error = soreserve(so, rip_sendspace, rip_recvspace);
! 375: if (error)
! 376: break;
! 377: }
! 378: error = in_pcballoc(so, &rawcbtable);
! 379: if (error)
1.13 mycroft 380: break;
1.25.4.2! mycroft 381: inp = sotoinpcb(so);
1.17 cgd 382: inp->inp_ip.ip_p = (long)nam;
1.1 cgd 383: break;
384:
385: case PRU_DETACH:
1.13 mycroft 386: #ifdef MROUTING
1.6 hpeyerl 387: if (so == ip_mrouter)
388: ip_mrouter_done();
389: #endif
1.13 mycroft 390: in_pcbdetach(inp);
1.1 cgd 391: break;
392:
393: case PRU_BIND:
1.25.4.2! mycroft 394: error = rip_bind(inp, nam);
! 395: break;
1.1 cgd 396:
1.25.4.2! mycroft 397: case PRU_LISTEN:
! 398: error = EOPNOTSUPP;
1.13 mycroft 399: break;
1.1 cgd 400:
1.25.4.2! mycroft 401: case PRU_CONNECT:
! 402: error = rip_connect(inp, nam);
! 403: if (error)
1.13 mycroft 404: break;
1.1 cgd 405: soisconnected(so);
1.13 mycroft 406: break;
407:
408: case PRU_CONNECT2:
409: error = EOPNOTSUPP;
410: break;
411:
1.25.4.2! mycroft 412: case PRU_DISCONNECT:
! 413: soisdisconnected(so);
! 414: rip_disconnect(inp);
! 415: break;
! 416:
1.13 mycroft 417: /*
418: * Mark the connection as being incapable of further input.
419: */
420: case PRU_SHUTDOWN:
421: socantsendmore(so);
422: break;
423:
1.25.4.2! mycroft 424: case PRU_RCVD:
! 425: error = EOPNOTSUPP;
! 426: break;
! 427:
1.13 mycroft 428: /*
429: * Ship a packet out. The appropriate raw output
430: * routine handles any massaging necessary.
431: */
432: case PRU_SEND:
1.25.4.2! mycroft 433: if (control && control->m_len) {
! 434: m_freem(control);
! 435: m_freem(m);
! 436: error = EINVAL;
! 437: break;
! 438: }
! 439: {
! 440: if (nam) {
! 441: if ((so->so_state & SS_ISCONNECTED) != 0) {
1.13 mycroft 442: error = EISCONN;
1.25.4.2! mycroft 443: goto die;
! 444: }
! 445: error = rip_connect(inp, nam);
! 446: if (error) {
! 447: die:
! 448: m_freem(m);
1.13 mycroft 449: break;
450: }
451: } else {
1.25.4.2! mycroft 452: if ((so->so_state & SS_ISCONNECTED) == 0) {
1.13 mycroft 453: error = ENOTCONN;
1.25.4.2! mycroft 454: goto die;
1.13 mycroft 455: }
456: }
1.25.4.2! mycroft 457: error = rip_output(m, inp);
! 458: if (nam)
! 459: rip_disconnect(inp);
! 460: }
1.13 mycroft 461: break;
462:
463: case PRU_SENSE:
464: /*
465: * stat: don't bother with a blocksize.
466: */
1.25.4.2! mycroft 467: splx(s);
1.1 cgd 468: return (0);
1.13 mycroft 469:
470: case PRU_RCVOOB:
1.25.4.2! mycroft 471: error = EOPNOTSUPP;
! 472: break;
! 473:
1.13 mycroft 474: case PRU_SENDOOB:
1.25.4.2! mycroft 475: m_freem(control);
! 476: m_freem(m);
1.13 mycroft 477: error = EOPNOTSUPP;
478: break;
479:
480: case PRU_SOCKADDR:
481: in_setsockaddr(inp, nam);
482: break;
483:
484: case PRU_PEERADDR:
485: in_setpeeraddr(inp, nam);
486: break;
487:
488: default:
489: panic("rip_usrreq");
1.1 cgd 490: }
1.25.4.2! mycroft 491:
1.22 pk 492: release:
1.25.4.2! mycroft 493: splx(s);
1.1 cgd 494: return (error);
495: }
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