1 | /* $NetBSD: raw_usrreq.c,v 1.55 2016/01/20 21:43:59 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1980, 1986, 1993 |
5 | * The Regents of the University of California. All rights reserved. |
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. Neither the name of the University nor the names of its contributors |
16 | * may be used to endorse or promote products derived from this software |
17 | * without specific prior written permission. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
29 | * SUCH DAMAGE. |
30 | * |
31 | * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 |
32 | */ |
33 | |
34 | /* |
35 | * Raw protocol interface. |
36 | */ |
37 | |
38 | #include <sys/cdefs.h> |
39 | __KERNEL_RCSID(0, "$NetBSD: raw_usrreq.c,v 1.55 2016/01/20 21:43:59 riastradh Exp $" ); |
40 | |
41 | #include <sys/param.h> |
42 | #include <sys/mbuf.h> |
43 | #include <sys/domain.h> |
44 | #include <sys/protosw.h> |
45 | #include <sys/socket.h> |
46 | #include <sys/socketvar.h> |
47 | #include <sys/errno.h> |
48 | #include <sys/systm.h> |
49 | #include <sys/proc.h> |
50 | #include <sys/kauth.h> |
51 | |
52 | #include <net/if.h> |
53 | #include <net/route.h> |
54 | #include <net/netisr.h> |
55 | #include <net/raw_cb.h> |
56 | |
57 | void |
58 | raw_init(void) |
59 | { |
60 | LIST_INIT(&rawcb); |
61 | } |
62 | |
63 | static inline int |
64 | equal(const struct sockaddr *a1, const struct sockaddr *a2) |
65 | { |
66 | return memcmp(a1, a2, a1->sa_len) == 0; |
67 | } |
68 | |
69 | /* |
70 | * raw_input: find the socket associated with the packet and move it over. |
71 | * If nothing exists for this packet, drop it. |
72 | */ |
73 | void |
74 | raw_input(struct mbuf *m0, ...) |
75 | { |
76 | struct rawcb *rp; |
77 | struct mbuf *m = m0; |
78 | struct socket *last; |
79 | va_list ap; |
80 | struct sockproto *proto; |
81 | struct sockaddr *src, *dst; |
82 | |
83 | KASSERT(mutex_owned(softnet_lock)); |
84 | |
85 | va_start(ap, m0); |
86 | proto = va_arg(ap, struct sockproto *); |
87 | src = va_arg(ap, struct sockaddr *); |
88 | dst = va_arg(ap, struct sockaddr *); |
89 | va_end(ap); |
90 | |
91 | last = NULL; |
92 | LIST_FOREACH(rp, &rawcb, rcb_list) { |
93 | if (rp->rcb_proto.sp_family != proto->sp_family) |
94 | continue; |
95 | if (rp->rcb_proto.sp_protocol && |
96 | rp->rcb_proto.sp_protocol != proto->sp_protocol) |
97 | continue; |
98 | /* |
99 | * We assume the lower level routines have |
100 | * placed the address in a canonical format |
101 | * suitable for a structure comparison. |
102 | * |
103 | * Note that if the lengths are not the same |
104 | * the comparison will fail at the first byte. |
105 | */ |
106 | if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) |
107 | continue; |
108 | if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) |
109 | continue; |
110 | if (last != NULL) { |
111 | struct mbuf *n; |
112 | if ((n = m_copy(m, 0, M_COPYALL)) == NULL) |
113 | ; |
114 | else if (sbappendaddr(&last->so_rcv, src, n, NULL) == 0) |
115 | /* should notify about lost packet */ |
116 | m_freem(n); |
117 | else { |
118 | sorwakeup(last); |
119 | } |
120 | } |
121 | last = rp->rcb_socket; |
122 | } |
123 | if (last == NULL || sbappendaddr(&last->so_rcv, src, m, NULL) == 0) |
124 | m_freem(m); |
125 | else { |
126 | sorwakeup(last); |
127 | } |
128 | } |
129 | |
130 | void * |
131 | raw_ctlinput(int cmd, const struct sockaddr *arg, void *d) |
132 | { |
133 | |
134 | if ((unsigned)cmd >= PRC_NCMDS) |
135 | return NULL; |
136 | return NULL; |
137 | /* INCOMPLETE */ |
138 | } |
139 | |
140 | void |
141 | raw_setsockaddr(struct rawcb *rp, struct sockaddr *nam) |
142 | { |
143 | |
144 | memcpy(nam, rp->rcb_laddr, rp->rcb_laddr->sa_len); |
145 | } |
146 | |
147 | void |
148 | raw_setpeeraddr(struct rawcb *rp, struct sockaddr *nam) |
149 | { |
150 | |
151 | memcpy(nam, rp->rcb_faddr, rp->rcb_faddr->sa_len); |
152 | } |
153 | |
154 | int |
155 | raw_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, |
156 | struct mbuf *control, struct lwp *l, |
157 | int (*output)(struct mbuf *, struct socket *)) |
158 | { |
159 | struct rawcb *rp = sotorawcb(so); |
160 | int error = 0; |
161 | |
162 | KASSERT(rp != NULL); |
163 | |
164 | /* |
165 | * Ship a packet out. The appropriate raw output |
166 | * routine handles any massaging necessary. |
167 | */ |
168 | if (control && control->m_len) { |
169 | m_freem(control); |
170 | m_freem(m); |
171 | return EINVAL; |
172 | } |
173 | if (nam) { |
174 | if ((so->so_state & SS_ISCONNECTED) != 0) { |
175 | error = EISCONN; |
176 | goto die; |
177 | } |
178 | error = (*so->so_proto->pr_usrreqs->pr_connect)(so, nam, l); |
179 | if (error) { |
180 | die: |
181 | m_freem(m); |
182 | return error; |
183 | } |
184 | } else { |
185 | if ((so->so_state & SS_ISCONNECTED) == 0) { |
186 | error = ENOTCONN; |
187 | goto die; |
188 | } |
189 | } |
190 | error = (*output)(m, so); |
191 | if (nam) |
192 | raw_disconnect(rp); |
193 | |
194 | return error; |
195 | } |
196 | |
197 | int |
198 | raw_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, |
199 | struct mbuf *control, struct lwp *l) |
200 | { |
201 | |
202 | KASSERT(req != PRU_ATTACH); |
203 | KASSERT(req != PRU_DETACH); |
204 | KASSERT(req != PRU_ACCEPT); |
205 | KASSERT(req != PRU_BIND); |
206 | KASSERT(req != PRU_LISTEN); |
207 | KASSERT(req != PRU_CONNECT); |
208 | KASSERT(req != PRU_CONNECT2); |
209 | KASSERT(req != PRU_DISCONNECT); |
210 | KASSERT(req != PRU_SHUTDOWN); |
211 | KASSERT(req != PRU_ABORT); |
212 | KASSERT(req != PRU_CONTROL); |
213 | KASSERT(req != PRU_SENSE); |
214 | KASSERT(req != PRU_PEERADDR); |
215 | KASSERT(req != PRU_SOCKADDR); |
216 | KASSERT(req != PRU_RCVD); |
217 | KASSERT(req != PRU_RCVOOB); |
218 | KASSERT(req != PRU_SEND); |
219 | KASSERT(req != PRU_SENDOOB); |
220 | KASSERT(req != PRU_PURGEIF); |
221 | |
222 | if (sotorawcb(so) == NULL) |
223 | return EINVAL; |
224 | |
225 | panic("raw_usrreq" ); |
226 | |
227 | return 0; |
228 | } |
229 | |