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dccp6_usrreq.c revision 1.9 
      1 /*	$KAME: dccp6_usrreq.c,v 1.13 2005/07/27 08:42:56 nishida Exp $	*/
      2 /*	$NetBSD: dccp6_usrreq.c,v 1.9 2016/11/18 06:50:04 knakahara Exp $ */
      3 
      4 /*
      5  * Copyright (C) 2003 WIDE Project.
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. Neither the name of the project nor the names of its contributors
     17  *    may be used to endorse or promote products derived from this software
     18  *    without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: dccp6_usrreq.c,v 1.9 2016/11/18 06:50:04 knakahara Exp $");
     35 
     36 #ifdef _KERNEL_OPT
     37 #include "opt_inet.h"
     38 #include "opt_dccp.h"
     39 #include "opt_net_mpsafe.h"
     40 #endif
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/domain.h>
     45 #include <sys/kernel.h>
     46 #include <sys/pool.h>
     47 #include <sys/lock.h>
     48 #include <sys/malloc.h>
     49 #include <sys/mbuf.h>
     50 #include <sys/proc.h>
     51 #include <sys/protosw.h>
     52 #include <sys/signalvar.h>
     53 #include <sys/socket.h>
     54 #include <sys/socketvar.h>
     55 #include <sys/mutex.h>
     56 #include <sys/sysctl.h>
     57 #include <sys/syslog.h>
     58 #include <sys/queue.h>
     59 
     60 #include <net/if.h>
     61 
     62 #include <netinet/in.h>
     63 #include <netinet/in_systm.h>
     64 #include <netinet/ip.h>
     65 #include <netinet/in_pcb.h>
     66 #include <netinet/in_var.h>
     67 #include <netinet/ip6.h>
     68 #include <netinet/ip_icmp.h>
     69 #include <netinet/icmp_var.h>
     70 #include <netinet/ip_var.h>
     71 #include <netinet6/in6_pcb.h>
     72 #include <netinet6/ip6_var.h>
     73 #include <netinet6/nd6.h>
     74 #include <netinet/dccp.h>
     75 #include <netinet/dccp_var.h>
     76 #include <netinet6/dccp6_var.h>
     77 #include <netinet/dccp_cc_sw.h>
     78 
     79 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
     80 #define	INP_INFO_LOCK_INIT(x,y)
     81 #define	INP_INFO_WLOCK(x)
     82 #define INP_INFO_WUNLOCK(x)
     83 #define	INP_INFO_RLOCK(x)
     84 #define INP_INFO_RUNLOCK(x)
     85 #define	INP_LOCK(x)
     86 #define INP_UNLOCK(x)
     87 #endif
     88 
     89 #define PULLDOWN_TEST
     90 
     91 int
     92 dccp6_input(struct mbuf **mp, int *offp, int proto)
     93 {
     94 	struct mbuf *m = *mp;
     95 	DCCP_DEBUG((LOG_INFO, "In dccp6_input!\n"));
     96 #ifndef PULLDOWN_TEST
     97 	IP6_EXTHDR_CHECK(m, *offp, sizeof(struct dccphdr), IPPROTO_DONE);
     98 #endif
     99 
    100 	dccp_input(m, *offp);
    101 	return IPPROTO_DONE;
    102 }
    103 
    104 void *
    105 dccp6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
    106 {
    107 	if (sa->sa_family != AF_INET6 ||
    108 	    sa->sa_len != sizeof(struct sockaddr_in6))
    109 		return NULL;
    110 
    111 	/* FIX LATER */
    112 	return NULL;
    113 }
    114 
    115 int
    116 dccp6_bind(struct socket *so, struct sockaddr *nam, struct lwp *td)
    117 {
    118 	struct in6pcb *in6p;
    119 	int error;
    120 	struct sockaddr_in6 *sin6p = (struct sockaddr_in6 *)nam;
    121 
    122 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_bind!\n"));
    123 	INP_INFO_WLOCK(&dccpbinfo);
    124 	in6p = sotoin6pcb(so);
    125 	if (in6p == 0) {
    126 		INP_INFO_WUNLOCK(&dccpbinfo);
    127 		DCCP_DEBUG((LOG_INFO, "dccp6_bind: in6p == 0!\n"));
    128 		return EINVAL;
    129 	}
    130 	/* Do not bind to multicast addresses! */
    131 	if (sin6p->sin6_family == AF_INET6 &&
    132 	    IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) {
    133 		INP_INFO_WUNLOCK(&dccpbinfo);
    134 		return EAFNOSUPPORT;
    135 	}
    136 	INP_LOCK(inp);
    137 
    138 	in6todccpcb(in6p)->inp_vflag &= ~INP_IPV4;
    139 	in6todccpcb(in6p)->inp_vflag |= INP_IPV6;
    140 
    141 	error = in6_pcbbind(in6p, sin6p, td);
    142 	INP_UNLOCK(inp);
    143 	INP_INFO_WUNLOCK(&dccpbinfo);
    144 	return error;
    145 }
    146 
    147 int
    148 dccp6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
    149 {
    150 	struct in6pcb *in6p;
    151 	struct dccpcb *dp;
    152 	int error;
    153 	struct sockaddr_in6 *sin6;
    154 	char test[2];
    155 
    156 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_connect!\n"));
    157 
    158 #ifndef __NetBSD__
    159 	INP_INFO_WLOCK(&dccpbinfo);
    160 	inp = sotoinpcb(so);
    161 	if (inp == 0) {
    162 		INP_INFO_WUNLOCK(&dccpbinfo);
    163 		return EINVAL;
    164 	}
    165 	INP_LOCK(inp);
    166 	if (inp->inp_faddr.s_addr != INADDR_ANY) {
    167 		INP_UNLOCK(inp);
    168 		INP_INFO_WUNLOCK(&dccpbinfo);
    169 		return EISCONN;
    170 	}
    171 
    172 	dp = (struct dccpcb *)inp->inp_ppcb;
    173 #else
    174 	in6p = sotoin6pcb(so);
    175 	if (in6p == 0) {
    176 		return EINVAL;
    177 	}
    178 	if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
    179 		return EISCONN;
    180 	}
    181 
    182 	dp = (struct dccpcb *)in6p->in6p_ppcb;
    183 #endif
    184 	if (dp->state == DCCPS_ESTAB) {
    185 		DCCP_DEBUG((LOG_INFO, "Why are we in connect when we already have a established connection?\n"));
    186 	}
    187 
    188 	dp->who = DCCP_CLIENT;
    189 	dp->seq_snd = (((u_int64_t)random() << 32) | random()) % 281474976710656LL;
    190 
    191 	sin6 = (struct sockaddr_in6 *)nam;
    192 	if (sin6->sin6_family == AF_INET6
    193 	    && IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
    194 		error = EAFNOSUPPORT;
    195 		goto bad;
    196 	}
    197 
    198 	dp->inp_vflag &= ~INP_IPV4;
    199 	dp->inp_vflag |= INP_IPV6;
    200 
    201 	error = dccp_doconnect(so, nam, l, 1);
    202 
    203 	if (error != 0)
    204 		goto bad;
    205 
    206 	callout_reset(&dp->retrans_timer, dp->retrans, dccp_retrans_t, dp);
    207 	callout_reset(&dp->connect_timer, DCCP_CONNECT_TIMER, dccp_connect_t, dp);
    208 
    209 	test[0] = dp->pref_cc;
    210 #if 0
    211 	/* FIX THIS LATER */
    212 	if (dp->pref_cc == 2) {
    213 		test[1] = 3;
    214 	} else {
    215 		test[1] = 2;
    216 	}
    217 	dccp_add_feature(dp, DCCP_OPT_CHANGE, DCCP_FEATURE_CC, test, 2);
    218 	dccp_add_feature(dp, DCCP_OPT_PREFER, DCCP_FEATURE_CC, test, 2);
    219 #else
    220 	 /* we only support CCID2 at this moment */
    221 	dccp_add_feature(dp, DCCP_OPT_CHANGE_R, DCCP_FEATURE_CC, test, 1);
    222 #endif
    223 
    224 	error = dccp_output(dp, 0);
    225 
    226 bad:
    227 	INP_UNLOCK(inp);
    228 	INP_INFO_WUNLOCK(&dccpbinfo);
    229 	return error;
    230 }
    231 
    232 
    233 int
    234 dccp6_listen(struct socket *so, struct lwp *l)
    235 {
    236 	struct in6pcb *in6p;
    237 	struct dccpcb *dp;
    238 	int error = 0;
    239 
    240 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_listen!\n"));
    241 
    242 	INP_INFO_RLOCK(&dccpbinfo);
    243 	in6p = sotoin6pcb(so);
    244 	if (in6p == 0) {
    245 		INP_INFO_RUNLOCK(&dccpbinfo);
    246 		return EINVAL;
    247 	}
    248 	INP_LOCK(inp);
    249 	INP_INFO_RUNLOCK(&dccpbinfo);
    250 	dp = in6todccpcb(in6p);
    251 	DCCP_DEBUG((LOG_INFO, "Checking in6p->in6p_lport!\n"));
    252 	if (in6p->in6p_lport == 0) {
    253 		error = in6_pcbbind(in6p, NULL, l);
    254 	}
    255 	if (error == 0) {
    256 		dp->state = DCCPS_LISTEN;
    257 		dp->who = DCCP_LISTENER;
    258 		dp->seq_snd = 512;
    259 	}
    260 	INP_UNLOCK(inp);
    261 	return error;
    262 }
    263 
    264 int
    265 dccp6_accept(struct socket *so, struct sockaddr *nam)
    266 {
    267 	struct in6pcb *in6p = NULL;
    268 	int error = 0;
    269 
    270 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_accept!\n"));
    271 	if (nam == NULL) {
    272 		return EINVAL;
    273 	}
    274 	if (so->so_state & SS_ISDISCONNECTED) {
    275 		DCCP_DEBUG((LOG_INFO, "so_state && SS_ISDISCONNECTED!, so->state = %i\n", so->so_state));
    276 		return ECONNABORTED;
    277 	}
    278 
    279 	INP_INFO_RLOCK(&dccpbinfo);
    280 	in6p = sotoin6pcb(so);
    281 	if (in6p == 0) {
    282 		INP_INFO_RUNLOCK(&dccpbinfo);
    283 		return EINVAL;
    284 	}
    285 	INP_LOCK(inp);
    286 	INP_INFO_RUNLOCK(&dccpbinfo);
    287 	in6_setpeeraddr(in6p, (struct sockaddr_in6 *)nam);
    288 
    289 	INP_UNLOCK(inp);
    290 	return error;
    291 }
    292 
    293 static int
    294 dccp6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
    295 {
    296 	int error = 0;
    297 	int family;
    298 
    299 	family = so->so_proto->pr_domain->dom_family;
    300 	switch (family) {
    301 	case PF_INET6:
    302 		error = in6_control(so, cmd, nam, ifp);
    303 		break;
    304 	default:
    305 		error =	 EAFNOSUPPORT;
    306 	}
    307 	return (error);
    308 }
    309 
    310 static int
    311 dccp6_stat(struct socket *so, struct stat *ub)
    312 {
    313 	return 0;
    314 }
    315 
    316 static int
    317 dccp6_purgeif(struct socket *so, struct ifnet *ifp)
    318 {
    319 	int s;
    320 
    321 	s = splsoftnet();
    322 #ifndef NET_MPSAFE
    323 	mutex_enter(softnet_lock);
    324 #endif
    325 	in6_pcbpurgeif0(&dccpbtable, ifp);
    326 	in6_purgeif(ifp);
    327 	in6_pcbpurgeif(&dccpbtable, ifp);
    328 #ifndef NET_MPSAFE
    329 	mutex_exit(softnet_lock);
    330 #endif
    331 	splx(s);
    332 
    333 	return 0;
    334 }
    335 
    336 static int
    337 dccp6_attach(struct socket *so, int proto)
    338 {
    339 	return dccp_attach(so, proto);
    340 }
    341 
    342 static int
    343 dccp6_detach(struct socket *so)
    344 {
    345 	return dccp_detach(so);
    346 }
    347 
    348 static int
    349 dccp6_connect2(struct socket *so, struct socket *so2)
    350 {
    351 	KASSERT(solocked(so));
    352 
    353 	return EOPNOTSUPP;
    354 }
    355 
    356 static int
    357 dccp6_disconnect(struct socket *so)
    358 {
    359 	return dccp_disconnect(so);
    360 }
    361 
    362 static int
    363 dccp6_shutdown(struct socket *so)
    364 {
    365 	return dccp_shutdown(so);
    366 }
    367 
    368 static int
    369 dccp6_abort(struct socket *so)
    370 {
    371 	return dccp_abort(so);
    372 }
    373 
    374 
    375 static int
    376 dccp6_peeraddr(struct socket *so, struct sockaddr *nam)
    377 {
    378 	KASSERT(solocked(so));
    379 	KASSERT(sotoinpcb(so) != NULL);
    380 	KASSERT(nam != NULL);
    381 
    382 	in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
    383 	return 0;
    384 }
    385 
    386 static int
    387 dccp6_sockaddr(struct socket *so, struct sockaddr *nam)
    388 {
    389 	KASSERT(solocked(so));
    390 	KASSERT(sotoinpcb(so) != NULL);
    391 	KASSERT(nam != NULL);
    392 
    393 	in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
    394 	return 0;
    395 }
    396 
    397 static int
    398 dccp6_recvoob(struct socket *so, struct mbuf *m, int flags)
    399 {
    400 	KASSERT(solocked(so));
    401 
    402 	return EOPNOTSUPP;
    403 }
    404 
    405 static int
    406 dccp6_rcvd(struct socket *so, int flags, struct lwp *l)
    407 {
    408 	KASSERT(solocked(so));
    409 
    410 	return EOPNOTSUPP;
    411 }
    412 
    413 static int
    414 dccp6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
    415     struct mbuf *control, struct lwp *l)
    416 {
    417 	return dccp_send(so, m, nam, control, l);
    418 }
    419 
    420 static int
    421 dccp6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
    422 {
    423 	KASSERT(solocked(so));
    424 
    425 	m_freem(m);
    426 	m_freem(control);
    427 
    428 	return EOPNOTSUPP;
    429 }
    430 
    431 
    432 PR_WRAP_USRREQS(dccp6)
    433 #define	dccp6_attach		dccp6_attach_wrapper
    434 #define	dccp6_detach		dccp6_detach_wrapper
    435 #define dccp6_accept		dccp6_accept_wrapper
    436 #define	dccp6_bind		dccp6_bind_wrapper
    437 #define	dccp6_listen		dccp6_listen_wrapper
    438 #define	dccp6_connect		dccp6_connect_wrapper
    439 #define	dccp6_connect2		dccp6_connect2_wrapper
    440 #define	dccp6_disconnect	dccp6_disconnect_wrapper
    441 #define	dccp6_shutdown		dccp6_shutdown_wrapper
    442 #define	dccp6_abort		dccp6_abort_wrapper
    443 #define	dccp6_ioctl		dccp6_ioctl_wrapper
    444 #define	dccp6_stat		dccp6_stat_wrapper
    445 #define	dccp6_peeraddr		dccp6_peeraddr_wrapper
    446 #define	dccp6_sockaddr		dccp6_sockaddr_wrapper
    447 #define	dccp6_rcvd		dccp6_rcvd_wrapper
    448 #define	dccp6_recvoob		dccp6_recvoob_wrapper
    449 #define	dccp6_send		dccp6_send_wrapper
    450 #define	dccp6_sendoob		dccp6_sendoob_wrapper
    451 #define	dccp6_purgeif		dccp6_purgeif_wrapper
    452 
    453 const struct pr_usrreqs dccp6_usrreqs = {
    454 	.pr_attach	= dccp6_attach,
    455 	.pr_detach	= dccp6_detach,
    456 	.pr_accept	= dccp6_accept,
    457 	.pr_bind	= dccp6_bind,
    458 	.pr_listen	= dccp6_listen,
    459 	.pr_connect	= dccp6_connect,
    460 	.pr_connect2	= dccp6_connect2,
    461 	.pr_disconnect	= dccp6_disconnect,
    462 	.pr_shutdown	= dccp6_shutdown,
    463 	.pr_abort	= dccp6_abort,
    464 	.pr_ioctl	= dccp6_ioctl,
    465 	.pr_stat	= dccp6_stat,
    466 	.pr_peeraddr	= dccp6_peeraddr,
    467 	.pr_sockaddr	= dccp6_sockaddr,
    468 	.pr_rcvd	= dccp6_rcvd,
    469 	.pr_recvoob	= dccp6_recvoob,
    470 	.pr_send	= dccp6_send,
    471 	.pr_sendoob	= dccp6_sendoob,
    472 	.pr_purgeif	= dccp6_purgeif,
    473 };
    474