Annotation of src/sys/netinet/raw_ip.c, Revision 1.25
1.25 ! christos 1: /* $NetBSD: raw_ip.c,v 1.24 1996/02/13 23:43:29 christos 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>
1.1 cgd 46:
1.7 mycroft 47: #include <net/if.h>
48: #include <net/route.h>
1.1 cgd 49:
1.7 mycroft 50: #include <netinet/in.h>
51: #include <netinet/in_systm.h>
52: #include <netinet/ip.h>
53: #include <netinet/ip_var.h>
1.13 mycroft 54: #include <netinet/ip_mroute.h>
1.7 mycroft 55: #include <netinet/in_pcb.h>
1.24 christos 56: #include <netinet/in_var.h>
57:
58: #include <machine/stdarg.h>
1.13 mycroft 59:
1.20 mycroft 60: struct inpcbtable rawcbtable;
1.13 mycroft 61:
62: /*
63: * Nominal space allocated to a raw ip socket.
64: */
65: #define RIPSNDQ 8192
66: #define RIPRCVQ 8192
1.1 cgd 67:
68: /*
69: * Raw interface to IP protocol.
70: */
1.13 mycroft 71:
72: /*
73: * Initialize raw connection block q.
74: */
75: void
76: rip_init()
77: {
78:
1.23 mycroft 79: in_pcbinit(&rawcbtable, 1);
1.13 mycroft 80: }
81:
1.1 cgd 82: struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
83: /*
84: * Setup generic address and protocol structures
85: * for raw_input routine, then pass them along with
86: * mbuf chain.
87: */
1.9 mycroft 88: void
1.24 christos 89: #if __STDC__
90: rip_input(struct mbuf *m, ...)
91: #else
92: rip_input(m, va_alist)
1.1 cgd 93: struct mbuf *m;
1.24 christos 94: va_dcl
95: #endif
1.1 cgd 96: {
97: register struct ip *ip = mtod(m, struct ip *);
1.13 mycroft 98: register struct inpcb *inp;
99: struct socket *last = 0;
1.1 cgd 100:
101: ripsrc.sin_addr = ip->ip_src;
1.21 cgd 102: for (inp = rawcbtable.inpt_queue.cqh_first;
103: inp != (struct inpcb *)&rawcbtable.inpt_queue;
104: inp = inp->inp_queue.cqe_next) {
1.13 mycroft 105: if (inp->inp_ip.ip_p && inp->inp_ip.ip_p != ip->ip_p)
106: continue;
107: if (inp->inp_laddr.s_addr &&
1.16 glass 108: inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
1.13 mycroft 109: continue;
110: if (inp->inp_faddr.s_addr &&
1.16 glass 111: inp->inp_faddr.s_addr != ip->ip_src.s_addr)
1.13 mycroft 112: continue;
113: if (last) {
114: struct mbuf *n;
1.24 christos 115: if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
1.13 mycroft 116: if (sbappendaddr(&last->so_rcv,
1.19 mycroft 117: sintosa(&ripsrc), n,
118: (struct mbuf *)0) == 0)
1.13 mycroft 119: /* should notify about lost packet */
120: m_freem(n);
121: else
122: sorwakeup(last);
123: }
124: }
125: last = inp->inp_socket;
126: }
127: if (last) {
1.19 mycroft 128: if (sbappendaddr(&last->so_rcv, sintosa(&ripsrc), m,
129: (struct mbuf *)0) == 0)
1.13 mycroft 130: m_freem(m);
131: else
132: sorwakeup(last);
133: } else {
134: m_freem(m);
1.1 cgd 135: ipstat.ips_noproto++;
136: ipstat.ips_delivered--;
137: }
138: }
139:
140: /*
141: * Generate IP header and pass packet to ip_output.
142: * Tack on options user may have setup with control call.
143: */
1.9 mycroft 144: int
1.24 christos 145: #if __STDC__
146: rip_output(struct mbuf *m, ...)
147: #else
148: rip_output(m, va_alist)
149: struct mbuf *m;
150: va_dcl
151: #endif
152: {
1.1 cgd 153: struct socket *so;
1.13 mycroft 154: u_long dst;
1.1 cgd 155: register struct ip *ip;
1.24 christos 156: register struct inpcb *inp;
1.10 mycroft 157: struct mbuf *opts;
1.24 christos 158: int flags;
159: va_list ap;
160:
161: va_start(ap, m);
162: so = va_arg(ap, struct socket *);
163: dst = va_arg(ap, u_long);
164: va_end(ap);
165:
166: inp = sotoinpcb(so);
167: flags = (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST;
1.1 cgd 168:
169: /*
170: * If the user handed us a complete IP packet, use it.
171: * Otherwise, allocate an mbuf for a header and fill it in.
172: */
1.13 mycroft 173: if ((inp->inp_flags & INP_HDRINCL) == 0) {
1.1 cgd 174: M_PREPEND(m, sizeof(struct ip), M_WAIT);
175: ip = mtod(m, struct ip *);
176: ip->ip_tos = 0;
177: ip->ip_off = 0;
1.13 mycroft 178: ip->ip_p = inp->inp_ip.ip_p;
1.1 cgd 179: ip->ip_len = m->m_pkthdr.len;
1.13 mycroft 180: ip->ip_src = inp->inp_laddr;
181: ip->ip_dst.s_addr = dst;
1.1 cgd 182: ip->ip_ttl = MAXTTL;
1.13 mycroft 183: opts = inp->inp_options;
184: } else {
185: ip = mtod(m, struct ip *);
186: if (ip->ip_id == 0)
187: ip->ip_id = htons(ip_id++);
188: opts = NULL;
189: /* XXX prevent ip_output from overwriting header fields */
190: flags |= IP_RAWOUTPUT;
191: ipstat.ips_rawout++;
1.1 cgd 192: }
1.13 mycroft 193: return (ip_output(m, opts, &inp->inp_route, flags, inp->inp_moptions));
1.1 cgd 194: }
195:
196: /*
197: * Raw IP socket option processing.
198: */
1.9 mycroft 199: int
1.1 cgd 200: rip_ctloutput(op, so, level, optname, m)
201: int op;
202: struct socket *so;
203: int level, optname;
204: struct mbuf **m;
205: {
1.13 mycroft 206: register struct inpcb *inp = sotoinpcb(so);
1.25 ! christos 207: #ifdef MROUTING
! 208: int error;
! 209: #endif
1.1 cgd 210:
1.15 mycroft 211: if (level != IPPROTO_IP) {
212: if (m != 0 && *m != 0)
213: (void)m_free(*m);
1.13 mycroft 214: return (EINVAL);
1.15 mycroft 215: }
1.1 cgd 216:
1.13 mycroft 217: switch (optname) {
1.1 cgd 218:
1.13 mycroft 219: case IP_HDRINCL:
220: if (op == PRCO_SETOPT || op == PRCO_GETOPT) {
221: if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int))
222: return (EINVAL);
223: if (op == PRCO_SETOPT) {
224: if (*mtod(*m, int *))
225: inp->inp_flags |= INP_HDRINCL;
226: else
227: inp->inp_flags &= ~INP_HDRINCL;
228: (void)m_free(*m);
229: } else {
230: (*m)->m_len = sizeof (int);
231: *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL;
232: }
233: return (0);
234: }
235: break;
1.1 cgd 236:
1.18 mycroft 237: case MRT_INIT:
238: case MRT_DONE:
239: case MRT_ADD_VIF:
240: case MRT_DEL_VIF:
241: case MRT_ADD_MFC:
242: case MRT_DEL_MFC:
243: case MRT_VERSION:
244: case MRT_ASSERT:
1.6 hpeyerl 245: #ifdef MROUTING
1.18 mycroft 246: switch (op) {
247: case PRCO_SETOPT:
248: error = ip_mrouter_set(optname, so, m);
249: break;
250: case PRCO_GETOPT:
251: error = ip_mrouter_get(optname, so, m);
252: break;
253: default:
1.13 mycroft 254: error = EINVAL;
1.18 mycroft 255: break;
256: }
1.13 mycroft 257: return (error);
1.6 hpeyerl 258: #else
1.13 mycroft 259: if (op == PRCO_SETOPT && *m)
1.18 mycroft 260: m_free(*m);
1.13 mycroft 261: return (EOPNOTSUPP);
1.6 hpeyerl 262: #endif
1.1 cgd 263: }
1.13 mycroft 264: return (ip_ctloutput(op, so, level, optname, m));
1.1 cgd 265: }
266:
1.13 mycroft 267: u_long rip_sendspace = RIPSNDQ;
268: u_long rip_recvspace = RIPRCVQ;
269:
1.1 cgd 270: /*ARGSUSED*/
1.9 mycroft 271: int
1.2 cgd 272: rip_usrreq(so, req, m, nam, control)
1.1 cgd 273: register struct socket *so;
274: int req;
1.2 cgd 275: struct mbuf *m, *nam, *control;
1.1 cgd 276: {
277: register int error = 0;
1.13 mycroft 278: register struct inpcb *inp = sotoinpcb(so);
279: #ifdef MROUTING
1.6 hpeyerl 280: extern struct socket *ip_mrouter;
281: #endif
1.22 pk 282: if (req == PRU_CONTROL)
283: return (in_control(so, (long)m, (caddr_t)nam,
284: (struct ifnet *)control));
285:
286: if (inp == NULL && req != PRU_ATTACH) {
287: error = EINVAL;
288: goto release;
289: }
290:
1.1 cgd 291: switch (req) {
292:
293: case PRU_ATTACH:
1.13 mycroft 294: if (inp)
1.1 cgd 295: panic("rip_attach");
1.13 mycroft 296: if ((so->so_state & SS_PRIV) == 0) {
297: error = EACCES;
298: break;
299: }
300: if ((error = soreserve(so, rip_sendspace, rip_recvspace)) ||
1.20 mycroft 301: (error = in_pcballoc(so, &rawcbtable)))
1.13 mycroft 302: break;
303: inp = (struct inpcb *)so->so_pcb;
1.17 cgd 304: inp->inp_ip.ip_p = (long)nam;
1.1 cgd 305: break;
306:
1.13 mycroft 307: case PRU_DISCONNECT:
308: if ((so->so_state & SS_ISCONNECTED) == 0) {
309: error = ENOTCONN;
310: break;
311: }
312: /* FALLTHROUGH */
313: case PRU_ABORT:
314: soisdisconnected(so);
315: /* FALLTHROUGH */
1.1 cgd 316: case PRU_DETACH:
1.13 mycroft 317: if (inp == 0)
1.1 cgd 318: panic("rip_detach");
1.13 mycroft 319: #ifdef MROUTING
1.6 hpeyerl 320: if (so == ip_mrouter)
321: ip_mrouter_done();
322: #endif
1.13 mycroft 323: in_pcbdetach(inp);
1.1 cgd 324: break;
325:
326: case PRU_BIND:
327: {
328: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
329:
1.13 mycroft 330: if (nam->m_len != sizeof(*addr)) {
331: error = EINVAL;
332: break;
333: }
1.20 mycroft 334: if ((ifnet.tqh_first == 0) ||
1.1 cgd 335: ((addr->sin_family != AF_INET) &&
336: (addr->sin_family != AF_IMPLINK)) ||
337: (addr->sin_addr.s_addr &&
1.19 mycroft 338: ifa_ifwithaddr(sintosa(addr)) == 0)) {
1.13 mycroft 339: error = EADDRNOTAVAIL;
340: break;
341: }
342: inp->inp_laddr = addr->sin_addr;
343: break;
1.1 cgd 344: }
345: case PRU_CONNECT:
346: {
347: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
348:
1.13 mycroft 349: if (nam->m_len != sizeof(*addr)) {
350: error = EINVAL;
351: break;
352: }
1.20 mycroft 353: if (ifnet.tqh_first == 0) {
1.13 mycroft 354: error = EADDRNOTAVAIL;
355: break;
356: }
1.1 cgd 357: if ((addr->sin_family != AF_INET) &&
1.13 mycroft 358: (addr->sin_family != AF_IMPLINK)) {
359: error = EAFNOSUPPORT;
360: break;
361: }
362: inp->inp_faddr = addr->sin_addr;
1.1 cgd 363: soisconnected(so);
1.13 mycroft 364: break;
365: }
366:
367: case PRU_CONNECT2:
368: error = EOPNOTSUPP;
369: break;
370:
371: /*
372: * Mark the connection as being incapable of further input.
373: */
374: case PRU_SHUTDOWN:
375: socantsendmore(so);
376: break;
377:
378: /*
379: * Ship a packet out. The appropriate raw output
380: * routine handles any massaging necessary.
381: */
382: case PRU_SEND:
383: {
1.17 cgd 384: register u_int32_t dst;
1.13 mycroft 385:
386: if (so->so_state & SS_ISCONNECTED) {
387: if (nam) {
388: error = EISCONN;
389: break;
390: }
391: dst = inp->inp_faddr.s_addr;
392: } else {
393: if (nam == NULL) {
394: error = ENOTCONN;
395: break;
396: }
397: dst = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
398: }
399: error = rip_output(m, so, dst);
400: m = NULL;
401: break;
402: }
403:
404: case PRU_SENSE:
405: /*
406: * stat: don't bother with a blocksize.
407: */
1.1 cgd 408: return (0);
1.13 mycroft 409:
410: /*
411: * Not supported.
412: */
413: case PRU_RCVOOB:
414: case PRU_RCVD:
415: case PRU_LISTEN:
416: case PRU_ACCEPT:
417: case PRU_SENDOOB:
418: error = EOPNOTSUPP;
419: break;
420:
421: case PRU_SOCKADDR:
422: in_setsockaddr(inp, nam);
423: break;
424:
425: case PRU_PEERADDR:
426: in_setpeeraddr(inp, nam);
427: break;
428:
429: default:
430: panic("rip_usrreq");
1.1 cgd 431: }
1.22 pk 432: release:
1.13 mycroft 433: if (m != NULL)
434: m_freem(m);
1.1 cgd 435: return (error);
436: }
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