2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
34 * $FreeBSD: src/sys/netinet/raw_ip.c,v 1.64.2.16 2003/08/24 08:24:38 hsu Exp $
35 * $DragonFly: src/sys/netinet/raw_ip.c,v 1.23 2005/08/15 16:46:21 dillon Exp $
38 #include "opt_inet6.h"
39 #include "opt_ipsec.h"
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
47 #include <sys/protosw.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/sysctl.h>
51 #include <sys/thread2.h>
53 #include <machine/stdarg.h>
55 #include <vm/vm_zone.h>
58 #include <net/route.h>
61 #include <netinet/in.h>
62 #include <netinet/in_systm.h>
63 #include <netinet/ip.h>
64 #include <netinet/in_pcb.h>
65 #include <netinet/in_var.h>
66 #include <netinet/ip_var.h>
68 #include <net/ip_mroute/ip_mroute.h>
69 #include <net/ipfw/ip_fw.h>
70 #include <net/dummynet/ip_dummynet.h>
73 #include <netproto/ipsec/ipsec.h>
77 #include <netinet6/ipsec.h>
80 struct inpcbinfo ripcbinfo
;
82 /* control hooks for ipfw and dummynet */
83 ip_fw_ctl_t
*ip_fw_ctl_ptr
;
84 ip_dn_ctl_t
*ip_dn_ctl_ptr
;
87 * hooks for multicast routing. They all default to NULL,
88 * so leave them not initialized and rely on BSS being set to 0.
91 /* The socket used to communicate with the multicast routing daemon. */
92 struct socket
*ip_mrouter
;
94 /* The various mrouter and rsvp functions */
95 int (*ip_mrouter_set
)(struct socket
*, struct sockopt
*);
96 int (*ip_mrouter_get
)(struct socket
*, struct sockopt
*);
97 int (*ip_mrouter_done
)(void);
98 int (*ip_mforward
)(struct ip
*, struct ifnet
*, struct mbuf
*,
99 struct ip_moptions
*);
100 int (*mrt_ioctl
)(int, caddr_t
);
101 int (*legal_vif_num
)(int);
102 u_long (*ip_mcast_src
)(int);
104 void (*rsvp_input_p
)(struct mbuf
*m
, ...);
105 int (*ip_rsvp_vif
)(struct socket
*, struct sockopt
*);
106 void (*ip_rsvp_force_done
)(struct socket
*);
109 * Nominal space allocated to a raw ip socket.
115 * Raw interface to IP protocol.
119 * Initialize raw connection block queue.
124 in_pcbinfo_init(&ripcbinfo
);
126 * XXX We don't use the hash list for raw IP, but it's easier
127 * to allocate a one entry hash list than it is to check all
128 * over the place for hashbase == NULL.
130 ripcbinfo
.hashbase
= hashinit(1, M_PCB
, &ripcbinfo
.hashmask
);
131 ripcbinfo
.porthashbase
= hashinit(1, M_PCB
, &ripcbinfo
.porthashmask
);
132 ripcbinfo
.wildcardhashbase
= hashinit(1, M_PCB
,
133 &ripcbinfo
.wildcardhashmask
);
134 ripcbinfo
.ipi_zone
= zinit("ripcb", sizeof(struct inpcb
),
135 maxsockets
, ZONE_INTERRUPT
, 0);
139 * Setup generic address and protocol structures
140 * for raw_input routine, then pass them along with
144 rip_input(struct mbuf
*m
, ...)
146 struct sockaddr_in ripsrc
= { sizeof ripsrc
, AF_INET
};
147 struct ip
*ip
= mtod(m
, struct ip
*);
149 struct inpcb
*last
= NULL
;
150 struct mbuf
*opts
= NULL
;
155 off
= __va_arg(ap
, int);
156 proto
= __va_arg(ap
, int);
159 ripsrc
.sin_addr
= ip
->ip_src
;
160 LIST_FOREACH(inp
, &ripcbinfo
.pcblisthead
, inp_list
) {
161 if (inp
->inp_flags
& INP_PLACEMARKER
)
164 if ((inp
->inp_vflag
& INP_IPV4
) == 0)
167 if (inp
->inp_ip_p
&& inp
->inp_ip_p
!= proto
)
169 if (inp
->inp_laddr
.s_addr
!= INADDR_ANY
&&
170 inp
->inp_laddr
.s_addr
!= ip
->ip_dst
.s_addr
)
172 if (inp
->inp_faddr
.s_addr
!= INADDR_ANY
&&
173 inp
->inp_faddr
.s_addr
!= ip
->ip_src
.s_addr
)
176 struct mbuf
*n
= m_copypacket(m
, MB_DONTWAIT
);
179 /* check AH/ESP integrity. */
180 if (n
&& ipsec4_in_reject_so(n
, last
->inp_socket
)) {
182 ipsecstat
.in_polvio
++;
183 /* do not inject data to pcb */
187 /* check AH/ESP integrity. */
188 if (ipsec4_in_reject(n
, last
)) {
190 /* do not inject data to pcb */
192 #endif /*FAST_IPSEC*/
194 if (last
->inp_flags
& INP_CONTROLOPTS
||
195 last
->inp_socket
->so_options
& SO_TIMESTAMP
)
196 ip_savecontrol(last
, &opts
, ip
, n
);
197 if (sbappendaddr(&last
->inp_socket
->so_rcv
,
198 (struct sockaddr
*)&ripsrc
, n
,
200 /* should notify about lost packet */
205 sorwakeup(last
->inp_socket
);
212 /* check AH/ESP integrity. */
213 if (last
&& ipsec4_in_reject_so(m
, last
->inp_socket
)) {
215 ipsecstat
.in_polvio
++;
216 ipstat
.ips_delivered
--;
217 /* do not inject data to pcb */
221 /* check AH/ESP integrity. */
222 if (last
&& ipsec4_in_reject(m
, last
)) {
224 ipstat
.ips_delivered
--;
225 /* do not inject data to pcb */
227 #endif /*FAST_IPSEC*/
229 if (last
->inp_flags
& INP_CONTROLOPTS
||
230 last
->inp_socket
->so_options
& SO_TIMESTAMP
)
231 ip_savecontrol(last
, &opts
, ip
, m
);
232 if (sbappendaddr(&last
->inp_socket
->so_rcv
,
233 (struct sockaddr
*)&ripsrc
, m
, opts
) == 0) {
238 sorwakeup(last
->inp_socket
);
241 ipstat
.ips_noproto
++;
242 ipstat
.ips_delivered
--;
247 * Generate IP header and pass packet to ip_output.
248 * Tack on options user may have setup with control call.
251 rip_output(struct mbuf
*m
, struct socket
*so
, ...)
254 struct inpcb
*inp
= so
->so_pcb
;
256 int flags
= (so
->so_options
& SO_DONTROUTE
) | IP_ALLOWBROADCAST
;
260 dst
= __va_arg(ap
, u_long
);
264 * If the user handed us a complete IP packet, use it.
265 * Otherwise, allocate an mbuf for a header and fill it in.
267 if ((inp
->inp_flags
& INP_HDRINCL
) == 0) {
268 if (m
->m_pkthdr
.len
+ sizeof(struct ip
) > IP_MAXPACKET
) {
272 M_PREPEND(m
, sizeof(struct ip
), MB_WAIT
);
275 ip
= mtod(m
, struct ip
*);
276 ip
->ip_tos
= inp
->inp_ip_tos
;
278 ip
->ip_p
= inp
->inp_ip_p
;
279 ip
->ip_len
= m
->m_pkthdr
.len
;
280 ip
->ip_src
= inp
->inp_laddr
;
281 ip
->ip_dst
.s_addr
= dst
;
282 ip
->ip_ttl
= inp
->inp_ip_ttl
;
284 if (m
->m_pkthdr
.len
> IP_MAXPACKET
) {
288 ip
= mtod(m
, struct ip
*);
289 /* don't allow both user specified and setsockopt options,
290 and don't allow packet length sizes that will crash */
291 if (((IP_VHL_HL(ip
->ip_vhl
) != (sizeof (*ip
) >> 2)) &&
293 (ip
->ip_len
> m
->m_pkthdr
.len
) ||
294 (ip
->ip_len
< (IP_VHL_HL(ip
->ip_vhl
) << 2))) {
299 ip
->ip_id
= ip_newid();
300 /* XXX prevent ip_output from overwriting header fields */
301 flags
|= IP_RAWOUTPUT
;
305 return (ip_output(m
, inp
->inp_options
, &inp
->inp_route
, flags
,
306 inp
->inp_moptions
, inp
));
310 * Raw IP socket option processing.
313 rip_ctloutput(struct socket
*so
, struct sockopt
*sopt
)
315 struct inpcb
*inp
= so
->so_pcb
;
318 if (sopt
->sopt_level
!= IPPROTO_IP
)
323 switch (sopt
->sopt_dir
) {
325 switch (sopt
->sopt_name
) {
327 optval
= inp
->inp_flags
& INP_HDRINCL
;
328 error
= sooptcopyout(sopt
, &optval
, sizeof optval
);
331 case IP_FW_ADD
: /* ADD actually returns the body... */
334 error
= ip_fw_ctl_ptr(sopt
);
339 case IP_DUMMYNET_GET
:
341 error
= ip_dn_ctl_ptr(sopt
);
354 case MRT_API_SUPPORT
:
356 case MRT_ADD_BW_UPCALL
:
357 case MRT_DEL_BW_UPCALL
:
358 error
= ip_mrouter_get
? ip_mrouter_get(so
, sopt
) :
363 error
= ip_ctloutput(so
, sopt
);
369 switch (sopt
->sopt_name
) {
371 error
= sooptcopyin(sopt
, &optval
, sizeof optval
,
376 inp
->inp_flags
|= INP_HDRINCL
;
378 inp
->inp_flags
&= ~INP_HDRINCL
;
387 error
= ip_fw_ctl_ptr(sopt
);
392 case IP_DUMMYNET_CONFIGURE
:
393 case IP_DUMMYNET_DEL
:
394 case IP_DUMMYNET_FLUSH
:
396 error
= ip_dn_ctl_ptr(sopt
);
398 error
= ENOPROTOOPT
;
402 error
= ip_rsvp_init(so
);
406 error
= ip_rsvp_done();
410 case IP_RSVP_VIF_OFF
:
411 error
= ip_rsvp_vif
?
412 ip_rsvp_vif(so
, sopt
) : EINVAL
;
423 case MRT_API_SUPPORT
:
425 case MRT_ADD_BW_UPCALL
:
426 case MRT_DEL_BW_UPCALL
:
427 error
= ip_mrouter_set
? ip_mrouter_set(so
, sopt
) :
432 error
= ip_ctloutput(so
, sopt
);
442 * This function exists solely to receive the PRC_IFDOWN messages which
443 * are sent by if_down(). It looks for an ifaddr whose ifa_addr is sa,
444 * and calls in_ifadown() to remove all routes corresponding to that address.
445 * It also receives the PRC_IFUP messages from if_up() and reinstalls the
449 rip_ctlinput(int cmd
, struct sockaddr
*sa
, void *vip
)
451 struct in_ifaddr
*ia
;
458 TAILQ_FOREACH(ia
, &in_ifaddrhead
, ia_link
) {
459 if (ia
->ia_ifa
.ifa_addr
== sa
&&
460 (ia
->ia_flags
& IFA_ROUTE
)) {
462 * in_ifscrub kills the interface route.
464 in_ifscrub(ia
->ia_ifp
, ia
);
466 * in_ifadown gets rid of all the rest of
467 * the routes. This is not quite the right
468 * thing to do, but at least if we are running
469 * a routing process they will come back.
471 in_ifadown(&ia
->ia_ifa
, 0);
478 TAILQ_FOREACH(ia
, &in_ifaddrhead
, ia_link
) {
479 if (ia
->ia_ifa
.ifa_addr
== sa
)
482 if (ia
== 0 || (ia
->ia_flags
& IFA_ROUTE
))
485 ifp
= ia
->ia_ifa
.ifa_ifp
;
487 if ((ifp
->if_flags
& IFF_LOOPBACK
) ||
488 (ifp
->if_flags
& IFF_POINTOPOINT
))
491 err
= rtinit(&ia
->ia_ifa
, RTM_ADD
, flags
);
493 ia
->ia_flags
|= IFA_ROUTE
;
498 u_long rip_sendspace
= RIPSNDQ
;
499 u_long rip_recvspace
= RIPRCVQ
;
501 SYSCTL_INT(_net_inet_raw
, OID_AUTO
, maxdgram
, CTLFLAG_RW
,
502 &rip_sendspace
, 0, "Maximum outgoing raw IP datagram size");
503 SYSCTL_INT(_net_inet_raw
, OID_AUTO
, recvspace
, CTLFLAG_RW
,
504 &rip_recvspace
, 0, "Maximum incoming raw IP datagram size");
507 rip_attach(struct socket
*so
, int proto
, struct pru_attach_info
*ai
)
515 if ((error
= suser_cred(ai
->p_ucred
, NULL_CRED_OKAY
)) != 0)
518 error
= soreserve(so
, rip_sendspace
, rip_recvspace
, ai
->sb_rlimit
);
522 error
= in_pcballoc(so
, &ripcbinfo
);
526 inp
= (struct inpcb
*)so
->so_pcb
;
527 inp
->inp_vflag
|= INP_IPV4
;
528 inp
->inp_ip_p
= proto
;
529 inp
->inp_ip_ttl
= ip_defttl
;
534 rip_detach(struct socket
*so
)
541 if (so
== ip_mrouter
&& ip_mrouter_done
)
543 if (ip_rsvp_force_done
)
544 ip_rsvp_force_done(so
);
552 rip_abort(struct socket
*so
)
554 soisdisconnected(so
);
555 if (so
->so_state
& SS_NOFDREF
)
556 return rip_detach(so
);
561 rip_disconnect(struct socket
*so
)
563 if ((so
->so_state
& SS_ISCONNECTED
) == 0)
565 return rip_abort(so
);
569 rip_bind(struct socket
*so
, struct sockaddr
*nam
, struct thread
*td
)
571 struct inpcb
*inp
= so
->so_pcb
;
572 struct sockaddr_in
*addr
= (struct sockaddr_in
*)nam
;
574 if (nam
->sa_len
!= sizeof(*addr
))
577 if (TAILQ_EMPTY(&ifnet
) || ((addr
->sin_family
!= AF_INET
) &&
578 (addr
->sin_family
!= AF_IMPLINK
)) ||
579 (addr
->sin_addr
.s_addr
!= INADDR_ANY
&&
580 ifa_ifwithaddr((struct sockaddr
*)addr
) == 0))
581 return EADDRNOTAVAIL
;
582 inp
->inp_laddr
= addr
->sin_addr
;
587 rip_connect(struct socket
*so
, struct sockaddr
*nam
, struct thread
*td
)
589 struct inpcb
*inp
= so
->so_pcb
;
590 struct sockaddr_in
*addr
= (struct sockaddr_in
*)nam
;
592 if (nam
->sa_len
!= sizeof(*addr
))
594 if (TAILQ_EMPTY(&ifnet
))
595 return EADDRNOTAVAIL
;
596 if ((addr
->sin_family
!= AF_INET
) &&
597 (addr
->sin_family
!= AF_IMPLINK
))
599 inp
->inp_faddr
= addr
->sin_addr
;
605 rip_shutdown(struct socket
*so
)
612 rip_send(struct socket
*so
, int flags
, struct mbuf
*m
, struct sockaddr
*nam
,
613 struct mbuf
*control
, struct thread
*td
)
615 struct inpcb
*inp
= so
->so_pcb
;
618 if (so
->so_state
& SS_ISCONNECTED
) {
623 dst
= inp
->inp_faddr
.s_addr
;
629 dst
= ((struct sockaddr_in
*)nam
)->sin_addr
.s_addr
;
631 return rip_output(m
, so
, dst
);
634 SYSCTL_PROC(_net_inet_raw
, OID_AUTO
/*XXX*/, pcblist
, CTLFLAG_RD
, &ripcbinfo
, 0,
635 in_pcblist_global
, "S,xinpcb", "List of active raw IP sockets");
637 struct pr_usrreqs rip_usrreqs
= {
638 rip_abort
, pru_accept_notsupp
, rip_attach
, rip_bind
, rip_connect
,
639 pru_connect2_notsupp
, in_control
, rip_detach
, rip_disconnect
,
640 pru_listen_notsupp
, in_setpeeraddr
, pru_rcvd_notsupp
,
641 pru_rcvoob_notsupp
, rip_send
, pru_sense_null
, rip_shutdown
,
642 in_setsockaddr
, sosend
, soreceive
, sopoll