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15637ed4 RG |
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 | * | |
38e82238 | 33 | * from: @(#)raw_ip.c 7.8 (Berkeley) 7/25/90 |
fde1aeb2 | 34 | * $Id: raw_ip.c,v 1.3 1993/11/25 01:35:11 wollman Exp $ |
15637ed4 RG |
35 | */ |
36 | ||
37 | #include "param.h" | |
38 | #include "malloc.h" | |
39 | #include "mbuf.h" | |
40 | #include "socket.h" | |
41 | #include "protosw.h" | |
42 | #include "socketvar.h" | |
43 | #include "errno.h" | |
44 | ||
45 | #include "../net/if.h" | |
46 | #include "../net/route.h" | |
47 | #include "../net/raw_cb.h" | |
48 | ||
49 | #include "in.h" | |
50 | #include "in_systm.h" | |
51 | #include "ip.h" | |
52 | #include "ip_var.h" | |
53 | #include "in_pcb.h" | |
54 | ||
55 | /* | |
56 | * Raw interface to IP protocol. | |
57 | */ | |
fde1aeb2 GW |
58 | static struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET }; |
59 | static struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET }; | |
60 | static struct sockproto ripproto = { PF_INET }; | |
15637ed4 | 61 | |
15637ed4 RG |
62 | /* |
63 | * Setup generic address and protocol structures | |
64 | * for raw_input routine, then pass them along with | |
65 | * mbuf chain. | |
66 | */ | |
4c45483e | 67 | void |
15637ed4 RG |
68 | rip_input(m) |
69 | struct mbuf *m; | |
70 | { | |
71 | register struct ip *ip = mtod(m, struct ip *); | |
72 | ||
73 | ripproto.sp_protocol = ip->ip_p; | |
74 | ripdst.sin_addr = ip->ip_dst; | |
75 | ripsrc.sin_addr = ip->ip_src; | |
76 | if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc, | |
77 | (struct sockaddr *)&ripdst) == 0) { | |
78 | ipstat.ips_noproto++; | |
79 | ipstat.ips_delivered--; | |
80 | } | |
81 | } | |
82 | ||
83 | /* | |
84 | * Generate IP header and pass packet to ip_output. | |
85 | * Tack on options user may have setup with control call. | |
86 | */ | |
87 | #define satosin(sa) ((struct sockaddr_in *)(sa)) | |
4c45483e | 88 | int |
15637ed4 RG |
89 | rip_output(m, so) |
90 | register struct mbuf *m; | |
91 | struct socket *so; | |
92 | { | |
93 | register struct ip *ip; | |
94 | register struct raw_inpcb *rp = sotorawinpcb(so); | |
95 | register struct sockaddr_in *sin; | |
96 | ||
97 | /* | |
98 | * If the user handed us a complete IP packet, use it. | |
99 | * Otherwise, allocate an mbuf for a header and fill it in. | |
100 | */ | |
101 | if (rp->rinp_flags & RINPF_HDRINCL) | |
102 | ip = mtod(m, struct ip *); | |
103 | else { | |
104 | M_PREPEND(m, sizeof(struct ip), M_WAIT); | |
105 | ip = mtod(m, struct ip *); | |
106 | ip->ip_tos = 0; | |
107 | ip->ip_off = 0; | |
108 | ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol; | |
109 | ip->ip_len = m->m_pkthdr.len; | |
110 | if (sin = satosin(rp->rinp_rcb.rcb_laddr)) { | |
111 | ip->ip_src = sin->sin_addr; | |
112 | } else | |
113 | ip->ip_src.s_addr = 0; | |
114 | if (sin = satosin(rp->rinp_rcb.rcb_faddr)) | |
115 | ip->ip_dst = sin->sin_addr; | |
116 | ip->ip_ttl = MAXTTL; | |
117 | } | |
118 | return (ip_output(m, | |
119 | (rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options, | |
120 | &rp->rinp_route, | |
121 | (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST)); | |
122 | } | |
123 | ||
124 | /* | |
125 | * Raw IP socket option processing. | |
126 | */ | |
4c45483e | 127 | int |
15637ed4 RG |
128 | rip_ctloutput(op, so, level, optname, m) |
129 | int op; | |
130 | struct socket *so; | |
131 | int level, optname; | |
132 | struct mbuf **m; | |
133 | { | |
134 | int error = 0; | |
135 | register struct raw_inpcb *rp = sotorawinpcb(so); | |
136 | ||
137 | if (level != IPPROTO_IP) | |
138 | error = EINVAL; | |
139 | else switch (op) { | |
140 | ||
141 | case PRCO_SETOPT: | |
142 | switch (optname) { | |
143 | ||
144 | case IP_OPTIONS: | |
145 | return (ip_pcbopts(&rp->rinp_options, *m)); | |
146 | ||
147 | case IP_HDRINCL: | |
148 | if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int)) { | |
149 | error = EINVAL; | |
150 | break; | |
151 | } | |
152 | if (*mtod(*m, int *)) | |
153 | rp->rinp_flags |= RINPF_HDRINCL; | |
154 | else | |
155 | rp->rinp_flags &= ~RINPF_HDRINCL; | |
156 | break; | |
157 | ||
158 | default: | |
159 | error = EINVAL; | |
160 | break; | |
161 | } | |
162 | break; | |
163 | ||
164 | case PRCO_GETOPT: | |
165 | *m = m_get(M_WAIT, MT_SOOPTS); | |
166 | switch (optname) { | |
167 | ||
168 | case IP_OPTIONS: | |
169 | if (rp->rinp_options) { | |
170 | (*m)->m_len = rp->rinp_options->m_len; | |
171 | bcopy(mtod(rp->rinp_options, caddr_t), | |
172 | mtod(*m, caddr_t), (unsigned)(*m)->m_len); | |
173 | } else | |
174 | (*m)->m_len = 0; | |
175 | break; | |
176 | ||
177 | case IP_HDRINCL: | |
178 | (*m)->m_len = sizeof (int); | |
179 | *mtod(*m, int *) = rp->rinp_flags & RINPF_HDRINCL; | |
180 | break; | |
181 | ||
182 | default: | |
183 | error = EINVAL; | |
184 | m_freem(*m); | |
185 | *m = 0; | |
186 | break; | |
187 | } | |
188 | break; | |
189 | } | |
190 | if (op == PRCO_SETOPT && *m) | |
191 | (void)m_free(*m); | |
192 | return (error); | |
193 | } | |
194 | ||
195 | /*ARGSUSED*/ | |
4c45483e | 196 | int |
15637ed4 RG |
197 | rip_usrreq(so, req, m, nam, control) |
198 | register struct socket *so; | |
199 | int req; | |
200 | struct mbuf *m, *nam, *control; | |
201 | { | |
202 | register int error = 0; | |
203 | register struct raw_inpcb *rp = sotorawinpcb(so); | |
204 | ||
205 | switch (req) { | |
206 | ||
207 | case PRU_ATTACH: | |
208 | if (rp) | |
209 | panic("rip_attach"); | |
210 | MALLOC(rp, struct raw_inpcb *, sizeof *rp, M_PCB, M_WAITOK); | |
211 | if (rp == 0) | |
212 | return (ENOBUFS); | |
213 | bzero((caddr_t)rp, sizeof *rp); | |
214 | so->so_pcb = (caddr_t)rp; | |
215 | break; | |
216 | ||
217 | case PRU_DETACH: | |
218 | if (rp == 0) | |
219 | panic("rip_detach"); | |
220 | if (rp->rinp_options) | |
221 | m_freem(rp->rinp_options); | |
222 | if (rp->rinp_route.ro_rt) | |
223 | RTFREE(rp->rinp_route.ro_rt); | |
224 | if (rp->rinp_rcb.rcb_laddr) | |
225 | rp->rinp_rcb.rcb_laddr = 0; | |
226 | break; | |
227 | ||
228 | case PRU_BIND: | |
229 | { | |
230 | struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *); | |
231 | ||
232 | if (nam->m_len != sizeof(*addr)) | |
233 | return (EINVAL); | |
234 | if ((ifnet == 0) || | |
235 | ((addr->sin_family != AF_INET) && | |
236 | (addr->sin_family != AF_IMPLINK)) || | |
237 | (addr->sin_addr.s_addr && | |
238 | ifa_ifwithaddr((struct sockaddr *)addr) == 0)) | |
239 | return (EADDRNOTAVAIL); | |
240 | rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr; | |
241 | rp->rinp_laddr = *addr; | |
242 | return (0); | |
243 | } | |
244 | case PRU_CONNECT: | |
245 | { | |
246 | struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *); | |
247 | ||
248 | if (nam->m_len != sizeof(*addr)) | |
249 | return (EINVAL); | |
250 | if (ifnet == 0) | |
251 | return (EADDRNOTAVAIL); | |
252 | if ((addr->sin_family != AF_INET) && | |
253 | (addr->sin_family != AF_IMPLINK)) | |
254 | return (EAFNOSUPPORT); | |
255 | rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr; | |
256 | rp->rinp_faddr = *addr; | |
257 | soisconnected(so); | |
258 | return (0); | |
259 | } | |
260 | } | |
fde1aeb2 | 261 | error = raw_usrreq(so, req, m, nam, control, 0); |
15637ed4 RG |
262 | |
263 | if (error && (req == PRU_ATTACH) && so->so_pcb) | |
264 | free(so->so_pcb, M_PCB); | |
265 | return (error); | |
266 | } |