Annotation of src/sys/netinet/raw_ip.c, Revision 1.8
1.1 cgd 1: /*
2: * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.3 cgd 33: * from: @(#)raw_ip.c 7.8 (Berkeley) 7/25/90
1.8 ! mycroft 34: * $Id: raw_ip.c,v 1.7 1993/12/18 00:42:00 mycroft Exp $
1.1 cgd 35: */
36:
1.7 mycroft 37: #include <sys/param.h>
38: #include <sys/malloc.h>
39: #include <sys/mbuf.h>
40: #include <sys/socket.h>
41: #include <sys/protosw.h>
42: #include <sys/socketvar.h>
43: #include <sys/errno.h>
1.1 cgd 44:
1.7 mycroft 45: #include <net/if.h>
46: #include <net/route.h>
47: #include <net/raw_cb.h>
1.1 cgd 48:
1.7 mycroft 49: #include <netinet/in.h>
50: #include <netinet/in_systm.h>
51: #include <netinet/ip.h>
52: #include <netinet/ip_var.h>
53: #include <netinet/in_pcb.h>
1.1 cgd 54:
55: /*
56: * Raw interface to IP protocol.
57: */
58:
59: struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
60: struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
61: struct sockproto ripproto = { PF_INET };
62: /*
63: * Setup generic address and protocol structures
64: * for raw_input routine, then pass them along with
65: * mbuf chain.
66: */
67: rip_input(m)
68: struct mbuf *m;
69: {
70: register struct ip *ip = mtod(m, struct ip *);
71:
72: ripproto.sp_protocol = ip->ip_p;
73: ripdst.sin_addr = ip->ip_dst;
74: ripsrc.sin_addr = ip->ip_src;
75: if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc,
76: (struct sockaddr *)&ripdst) == 0) {
77: ipstat.ips_noproto++;
78: ipstat.ips_delivered--;
79: }
80: }
81:
82: /*
83: * Generate IP header and pass packet to ip_output.
84: * Tack on options user may have setup with control call.
85: */
86: #define satosin(sa) ((struct sockaddr_in *)(sa))
87: rip_output(m, so)
88: register struct mbuf *m;
89: struct socket *so;
90: {
91: register struct ip *ip;
92: register struct raw_inpcb *rp = sotorawinpcb(so);
93: register struct sockaddr_in *sin;
94:
95: /*
96: * If the user handed us a complete IP packet, use it.
97: * Otherwise, allocate an mbuf for a header and fill it in.
98: */
1.4 cgd 99: if (rp->rinp_flags & RINPF_HDRINCL) {
1.1 cgd 100: ip = mtod(m, struct ip *);
1.4 cgd 101: if (ip->ip_len > m->m_pkthdr.len)
102: return EMSGSIZE;
103: ip->ip_len = m->m_pkthdr.len;
104: } else {
1.1 cgd 105: M_PREPEND(m, sizeof(struct ip), M_WAIT);
106: ip = mtod(m, struct ip *);
107: ip->ip_tos = 0;
108: ip->ip_off = 0;
109: ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol;
110: ip->ip_len = m->m_pkthdr.len;
111: if (sin = satosin(rp->rinp_rcb.rcb_laddr)) {
112: ip->ip_src = sin->sin_addr;
113: } else
114: ip->ip_src.s_addr = 0;
115: if (sin = satosin(rp->rinp_rcb.rcb_faddr))
116: ip->ip_dst = sin->sin_addr;
117: ip->ip_ttl = MAXTTL;
118: }
119: return (ip_output(m,
120: (rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options,
1.8 ! mycroft 121: &rp->rinp_route,
1.6 hpeyerl 122: (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST
123: #ifdef MULTICAST
124: | IP_MULTICASTOPTS, rp->rinp_rcb.rcb_moptions
125: #endif
126: ));
1.1 cgd 127: }
128:
129: /*
130: * Raw IP socket option processing.
131: */
132: rip_ctloutput(op, so, level, optname, m)
133: int op;
134: struct socket *so;
135: int level, optname;
136: struct mbuf **m;
137: {
138: int error = 0;
139: register struct raw_inpcb *rp = sotorawinpcb(so);
140:
141: if (level != IPPROTO_IP)
142: error = EINVAL;
143: else switch (op) {
144:
145: case PRCO_SETOPT:
146: switch (optname) {
147:
148: case IP_OPTIONS:
149: return (ip_pcbopts(&rp->rinp_options, *m));
150:
151: case IP_HDRINCL:
152: if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int)) {
153: error = EINVAL;
154: break;
155: }
156: if (*mtod(*m, int *))
157: rp->rinp_flags |= RINPF_HDRINCL;
158: else
159: rp->rinp_flags &= ~RINPF_HDRINCL;
160: break;
1.6 hpeyerl 161: #ifdef MULTICAST
162: case IP_MULTICAST_IF:
163: case IP_MULTICAST_TTL:
164: case IP_MULTICAST_LOOP:
165: case IP_ADD_MEMBERSHIP:
166: case IP_DROP_MEMBERSHIP:
167: error = ip_setmoptions(optname,
168: &rp->rinp_rcb.rcb_moptions, *m);
169: break;
170: default:
171: #ifdef MROUTING
172: error = ip_mrouter_cmd(optname, so, *m);
173: #else
174: error = EINVAL;
175: #endif
176: break;
177: #else
1.1 cgd 178: default:
179: error = EINVAL;
180: break;
1.6 hpeyerl 181: #endif
1.1 cgd 182: }
183: break;
184:
185: case PRCO_GETOPT:
186: *m = m_get(M_WAIT, MT_SOOPTS);
187: switch (optname) {
188:
189: case IP_OPTIONS:
190: if (rp->rinp_options) {
191: (*m)->m_len = rp->rinp_options->m_len;
192: bcopy(mtod(rp->rinp_options, caddr_t),
193: mtod(*m, caddr_t), (unsigned)(*m)->m_len);
194: } else
195: (*m)->m_len = 0;
196: break;
197:
198: case IP_HDRINCL:
199: (*m)->m_len = sizeof (int);
200: *mtod(*m, int *) = rp->rinp_flags & RINPF_HDRINCL;
201: break;
1.6 hpeyerl 202: #ifdef MULTICAST
203: case IP_MULTICAST_IF:
204: case IP_MULTICAST_TTL:
205: case IP_MULTICAST_LOOP:
206: case IP_ADD_MEMBERSHIP:
207: case IP_DROP_MEMBERSHIP:
1.8 ! mycroft 208: error = ip_getmoptions(optname,
! 209: rp->rinp_rcb.rcb_moptions, m);
! 210: break;
1.6 hpeyerl 211: #endif
1.1 cgd 212: default:
213: error = EINVAL;
214: m_freem(*m);
215: *m = 0;
216: break;
217: }
218: break;
219: }
220: if (op == PRCO_SETOPT && *m)
221: (void)m_free(*m);
222: return (error);
223: }
224:
225: /*ARGSUSED*/
1.2 cgd 226: rip_usrreq(so, req, m, nam, control)
1.1 cgd 227: register struct socket *so;
228: int req;
1.2 cgd 229: struct mbuf *m, *nam, *control;
1.1 cgd 230: {
231: register int error = 0;
232: register struct raw_inpcb *rp = sotorawinpcb(so);
1.6 hpeyerl 233: #if defined(MULTICAST) && defined(MROUTING)
234: extern struct socket *ip_mrouter;
235: #endif
1.1 cgd 236: switch (req) {
237:
238: case PRU_ATTACH:
239: if (rp)
240: panic("rip_attach");
241: MALLOC(rp, struct raw_inpcb *, sizeof *rp, M_PCB, M_WAITOK);
242: if (rp == 0)
243: return (ENOBUFS);
244: bzero((caddr_t)rp, sizeof *rp);
245: so->so_pcb = (caddr_t)rp;
246: break;
247:
248: case PRU_DETACH:
249: if (rp == 0)
250: panic("rip_detach");
1.6 hpeyerl 251: #if defined(MULTICAST) && defined(MROUTING)
252: if (so == ip_mrouter)
253: ip_mrouter_done();
254: #endif
1.1 cgd 255: if (rp->rinp_options)
256: m_freem(rp->rinp_options);
1.6 hpeyerl 257: #ifdef MULTICAST
258: if (rp->rinp_rcb.rcb_moptions)
259: ip_freemoptions(rp->rinp_rcb.rcb_moptions);
260: #endif
1.1 cgd 261: if (rp->rinp_route.ro_rt)
262: RTFREE(rp->rinp_route.ro_rt);
263: if (rp->rinp_rcb.rcb_laddr)
264: rp->rinp_rcb.rcb_laddr = 0;
265: break;
266:
267: case PRU_BIND:
268: {
269: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
270:
271: if (nam->m_len != sizeof(*addr))
272: return (EINVAL);
273: if ((ifnet == 0) ||
274: ((addr->sin_family != AF_INET) &&
275: (addr->sin_family != AF_IMPLINK)) ||
276: (addr->sin_addr.s_addr &&
277: ifa_ifwithaddr((struct sockaddr *)addr) == 0))
278: return (EADDRNOTAVAIL);
279: rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr;
280: rp->rinp_laddr = *addr;
281: return (0);
282: }
283: case PRU_CONNECT:
284: {
285: struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
286:
287: if (nam->m_len != sizeof(*addr))
288: return (EINVAL);
289: if (ifnet == 0)
290: return (EADDRNOTAVAIL);
291: if ((addr->sin_family != AF_INET) &&
292: (addr->sin_family != AF_IMPLINK))
293: return (EAFNOSUPPORT);
294: rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr;
295: rp->rinp_faddr = *addr;
296: soisconnected(so);
297: return (0);
298: }
299: }
300: error = raw_usrreq(so, req, m, nam, control);
301:
302: if (error && (req == PRU_ATTACH) && so->so_pcb)
303: free(so->so_pcb, M_PCB);
304: return (error);
305: }
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