Annotation of src/sys/netinet/raw_ip.c, Revision 1.24
1.24 ! christos 1: /* $NetBSD: raw_ip.c,v 1.23 1996/01/31 03:49:31 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>
1.1 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);
1.1 cgd 207:
1.15 mycroft 208: if (level != IPPROTO_IP) {
209: if (m != 0 && *m != 0)
210: (void)m_free(*m);
1.13 mycroft 211: return (EINVAL);
1.15 mycroft 212: }
1.1 cgd 213:
1.13 mycroft 214: switch (optname) {
1.1 cgd 215:
1.13 mycroft 216: case IP_HDRINCL:
217: if (op == PRCO_SETOPT || op == PRCO_GETOPT) {
218: if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int))
219: return (EINVAL);
220: if (op == PRCO_SETOPT) {
221: if (*mtod(*m, int *))
222: inp->inp_flags |= INP_HDRINCL;
223: else
224: inp->inp_flags &= ~INP_HDRINCL;
225: (void)m_free(*m);
226: } else {
227: (*m)->m_len = sizeof (int);
228: *mtod(*m, int *) = inp->inp_flags & INP_HDRINCL;
229: }
230: return (0);
231: }
232: break;
1.1 cgd 233:
1.18 mycroft 234: case MRT_INIT:
235: case MRT_DONE:
236: case MRT_ADD_VIF:
237: case MRT_DEL_VIF:
238: case MRT_ADD_MFC:
239: case MRT_DEL_MFC:
240: case MRT_VERSION:
241: case MRT_ASSERT:
1.6 hpeyerl 242: #ifdef MROUTING
1.18 mycroft 243: switch (op) {
244: case PRCO_SETOPT:
245: error = ip_mrouter_set(optname, so, m);
246: break;
247: case PRCO_GETOPT:
248: error = ip_mrouter_get(optname, so, m);
249: break;
250: default:
1.13 mycroft 251: error = EINVAL;
1.18 mycroft 252: break;
253: }
1.13 mycroft 254: return (error);
1.6 hpeyerl 255: #else
1.13 mycroft 256: if (op == PRCO_SETOPT && *m)
1.18 mycroft 257: m_free(*m);
1.13 mycroft 258: return (EOPNOTSUPP);
1.6 hpeyerl 259: #endif
1.1 cgd 260: }
1.13 mycroft 261: return (ip_ctloutput(op, so, level, optname, m));
1.1 cgd 262: }
263:
1.13 mycroft 264: u_long rip_sendspace = RIPSNDQ;
265: u_long rip_recvspace = RIPRCVQ;
266:
1.1 cgd 267: /*ARGSUSED*/
1.9 mycroft 268: int
1.2 cgd 269: rip_usrreq(so, req, m, nam, control)
1.1 cgd 270: register struct socket *so;
271: int req;
1.2 cgd 272: struct mbuf *m, *nam, *control;
1.1 cgd 273: {
274: register int error = 0;
1.13 mycroft 275: register struct inpcb *inp = sotoinpcb(so);
276: #ifdef MROUTING
1.6 hpeyerl 277: extern struct socket *ip_mrouter;
278: #endif
1.22 pk 279: if (req == PRU_CONTROL)
280: return (in_control(so, (long)m, (caddr_t)nam,
281: (struct ifnet *)control));
282:
283: if (inp == NULL && req != PRU_ATTACH) {
284: error = EINVAL;
285: goto release;
286: }
287:
1.1 cgd 288: switch (req) {
289:
290: case PRU_ATTACH:
1.13 mycroft 291: if (inp)
1.1 cgd 292: panic("rip_attach");
1.13 mycroft 293: if ((so->so_state & SS_PRIV) == 0) {
294: error = EACCES;
295: break;
296: }
297: if ((error = soreserve(so, rip_sendspace, rip_recvspace)) ||
1.20 mycroft 298: (error = in_pcballoc(so, &rawcbtable)))
1.13 mycroft 299: break;
300: inp = (struct inpcb *)so->so_pcb;
1.17 cgd 301: inp->inp_ip.ip_p = (long)nam;
1.1 cgd 302: break;
303:
1.13 mycroft 304: case PRU_DISCONNECT:
305: if ((so->so_state & SS_ISCONNECTED) == 0) {
306: error = ENOTCONN;
307: break;
308: }
309: /* FALLTHROUGH */
310: case PRU_ABORT:
311: soisdisconnected(so);
312: /* FALLTHROUGH */
1.1 cgd 313: case PRU_DETACH:
1.13 mycroft 314: if (inp == 0)
1.1 cgd 315: panic("rip_detach");
1.13 mycroft 316: #ifdef MROUTING
1.6 hpeyerl 317: if (so == ip_mrouter)
318: ip_mrouter_done();
319: #endif
1.13 mycroft 320: in_pcbdetach(inp);
1.1 cgd 321: break;
322:
323: case PRU_BIND:
324: {
325: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
326:
1.13 mycroft 327: if (nam->m_len != sizeof(*addr)) {
328: error = EINVAL;
329: break;
330: }
1.20 mycroft 331: if ((ifnet.tqh_first == 0) ||
1.1 cgd 332: ((addr->sin_family != AF_INET) &&
333: (addr->sin_family != AF_IMPLINK)) ||
334: (addr->sin_addr.s_addr &&
1.19 mycroft 335: ifa_ifwithaddr(sintosa(addr)) == 0)) {
1.13 mycroft 336: error = EADDRNOTAVAIL;
337: break;
338: }
339: inp->inp_laddr = addr->sin_addr;
340: break;
1.1 cgd 341: }
342: case PRU_CONNECT:
343: {
344: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
345:
1.13 mycroft 346: if (nam->m_len != sizeof(*addr)) {
347: error = EINVAL;
348: break;
349: }
1.20 mycroft 350: if (ifnet.tqh_first == 0) {
1.13 mycroft 351: error = EADDRNOTAVAIL;
352: break;
353: }
1.1 cgd 354: if ((addr->sin_family != AF_INET) &&
1.13 mycroft 355: (addr->sin_family != AF_IMPLINK)) {
356: error = EAFNOSUPPORT;
357: break;
358: }
359: inp->inp_faddr = addr->sin_addr;
1.1 cgd 360: soisconnected(so);
1.13 mycroft 361: break;
362: }
363:
364: case PRU_CONNECT2:
365: error = EOPNOTSUPP;
366: break;
367:
368: /*
369: * Mark the connection as being incapable of further input.
370: */
371: case PRU_SHUTDOWN:
372: socantsendmore(so);
373: break;
374:
375: /*
376: * Ship a packet out. The appropriate raw output
377: * routine handles any massaging necessary.
378: */
379: case PRU_SEND:
380: {
1.17 cgd 381: register u_int32_t dst;
1.13 mycroft 382:
383: if (so->so_state & SS_ISCONNECTED) {
384: if (nam) {
385: error = EISCONN;
386: break;
387: }
388: dst = inp->inp_faddr.s_addr;
389: } else {
390: if (nam == NULL) {
391: error = ENOTCONN;
392: break;
393: }
394: dst = mtod(nam, struct sockaddr_in *)->sin_addr.s_addr;
395: }
396: error = rip_output(m, so, dst);
397: m = NULL;
398: break;
399: }
400:
401: case PRU_SENSE:
402: /*
403: * stat: don't bother with a blocksize.
404: */
1.1 cgd 405: return (0);
1.13 mycroft 406:
407: /*
408: * Not supported.
409: */
410: case PRU_RCVOOB:
411: case PRU_RCVD:
412: case PRU_LISTEN:
413: case PRU_ACCEPT:
414: case PRU_SENDOOB:
415: error = EOPNOTSUPP;
416: break;
417:
418: case PRU_SOCKADDR:
419: in_setsockaddr(inp, nam);
420: break;
421:
422: case PRU_PEERADDR:
423: in_setpeeraddr(inp, nam);
424: break;
425:
426: default:
427: panic("rip_usrreq");
1.1 cgd 428: }
1.22 pk 429: release:
1.13 mycroft 430: if (m != NULL)
431: m_freem(m);
1.1 cgd 432: return (error);
433: }
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