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dccp6_usrreq.c revision 1.6 
      1 /*	$KAME: dccp6_usrreq.c,v 1.13 2005/07/27 08:42:56 nishida Exp $	*/
      2 /*	$NetBSD: dccp6_usrreq.c,v 1.6 2015/05/02 17:18:03 rtr 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 1.6 2015/05/02 17:18:03 rtr Exp $");
     35 
     36 #include "opt_inet.h"
     37 #include "opt_dccp.h"
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/domain.h>
     42 #include <sys/kernel.h>
     43 #include <sys/pool.h>
     44 #include <sys/lock.h>
     45 #include <sys/malloc.h>
     46 #include <sys/mbuf.h>
     47 #include <sys/proc.h>
     48 #include <sys/protosw.h>
     49 #include <sys/signalvar.h>
     50 #include <sys/socket.h>
     51 #include <sys/socketvar.h>
     52 #include <sys/mutex.h>
     53 #include <sys/sysctl.h>
     54 #include <sys/syslog.h>
     55 #include <sys/queue.h>
     56 
     57 #include <net/if.h>
     58 #include <net/route.h>
     59 
     60 #include <netinet/in.h>
     61 #include <netinet/in_systm.h>
     62 #include <netinet/ip.h>
     63 #include <netinet/in_pcb.h>
     64 #include <netinet/in_var.h>
     65 #include <netinet/ip6.h>
     66 #include <netinet/ip_icmp.h>
     67 #include <netinet/icmp_var.h>
     68 #include <netinet/ip_var.h>
     69 #include <netinet6/in6_pcb.h>
     70 #include <netinet6/ip6_var.h>
     71 #include <netinet6/nd6.h>
     72 #include <netinet/dccp.h>
     73 #include <netinet/dccp_var.h>
     74 #include <netinet6/dccp6_var.h>
     75 #include <netinet/dccp_cc_sw.h>
     76 
     77 #if !defined(__FreeBSD__) || __FreeBSD_version < 500000
     78 #define	INP_INFO_LOCK_INIT(x,y)
     79 #define	INP_INFO_WLOCK(x)
     80 #define INP_INFO_WUNLOCK(x)
     81 #define	INP_INFO_RLOCK(x)
     82 #define INP_INFO_RUNLOCK(x)
     83 #define	INP_LOCK(x)
     84 #define INP_UNLOCK(x)
     85 #endif
     86 
     87 #define PULLDOWN_TEST
     88 
     89 int
     90 dccp6_input(struct mbuf **mp, int *offp, int proto)
     91 {
     92 	struct mbuf *m = *mp;
     93 	DCCP_DEBUG((LOG_INFO, "In dccp6_input!\n"));
     94 #ifndef PULLDOWN_TEST
     95 	IP6_EXTHDR_CHECK(m, *offp, sizeof(struct dccphdr), IPPROTO_DONE);
     96 #endif
     97 
     98 	dccp_input(m, *offp);
     99 	return IPPROTO_DONE;
    100 }
    101 
    102 void *
    103 dccp6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
    104 {
    105 	if (sa->sa_family != AF_INET6 ||
    106 	    sa->sa_len != sizeof(struct sockaddr_in6))
    107 		return NULL;
    108 
    109 	/* FIX LATER */
    110 	return NULL;
    111 }
    112 
    113 int
    114 dccp6_bind(struct socket *so, struct sockaddr *nam, struct lwp *td)
    115 {
    116 	struct in6pcb *in6p;
    117 	int error;
    118 	struct sockaddr_in6 *sin6p = (struct sockaddr_in6 *)nam;
    119 
    120 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_bind!\n"));
    121 	INP_INFO_WLOCK(&dccpbinfo);
    122 	in6p = sotoin6pcb(so);
    123 	if (in6p == 0) {
    124 		INP_INFO_WUNLOCK(&dccpbinfo);
    125 		DCCP_DEBUG((LOG_INFO, "dccp6_bind: in6p == 0!\n"));
    126 		return EINVAL;
    127 	}
    128 	/* Do not bind to multicast addresses! */
    129 	if (sin6p->sin6_family == AF_INET6 &&
    130 	    IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) {
    131 		INP_INFO_WUNLOCK(&dccpbinfo);
    132 		return EAFNOSUPPORT;
    133 	}
    134 	INP_LOCK(inp);
    135 
    136 	in6todccpcb(in6p)->inp_vflag &= ~INP_IPV4;
    137 	in6todccpcb(in6p)->inp_vflag |= INP_IPV6;
    138 
    139 	error = in6_pcbbind(in6p, sin6p, td);
    140 	INP_UNLOCK(inp);
    141 	INP_INFO_WUNLOCK(&dccpbinfo);
    142 	return error;
    143 }
    144 
    145 int
    146 dccp6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
    147 {
    148 	struct in6pcb *in6p;
    149 	struct dccpcb *dp;
    150 	int error;
    151 	struct sockaddr_in6 *sin6;
    152 	char test[2];
    153 
    154 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_connect!\n"));
    155 
    156 #ifndef __NetBSD__
    157 	INP_INFO_WLOCK(&dccpbinfo);
    158 	inp = sotoinpcb(so);
    159 	if (inp == 0) {
    160 		INP_INFO_WUNLOCK(&dccpbinfo);
    161 		return EINVAL;
    162 	}
    163 	INP_LOCK(inp);
    164 	if (inp->inp_faddr.s_addr != INADDR_ANY) {
    165 		INP_UNLOCK(inp);
    166 		INP_INFO_WUNLOCK(&dccpbinfo);
    167 		return EISCONN;
    168 	}
    169 
    170 	dp = (struct dccpcb *)inp->inp_ppcb;
    171 #else
    172 	in6p = sotoin6pcb(so);
    173 	if (in6p == 0) {
    174 		return EINVAL;
    175 	}
    176 	if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
    177 		return EISCONN;
    178 	}
    179 
    180 	dp = (struct dccpcb *)in6p->in6p_ppcb;
    181 #endif
    182 	if (dp->state == DCCPS_ESTAB) {
    183 		DCCP_DEBUG((LOG_INFO, "Why are we in connect when we already have a established connection?\n"));
    184 	}
    185 
    186 	dp->who = DCCP_CLIENT;
    187 	dp->seq_snd = (((u_int64_t)random() << 32) | random()) % 281474976710656LL;
    188 
    189 	sin6 = (struct sockaddr_in6 *)nam;
    190 	if (sin6->sin6_family == AF_INET6
    191 	    && IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
    192 		error = EAFNOSUPPORT;
    193 		goto bad;
    194 	}
    195 
    196 	dp->inp_vflag &= ~INP_IPV4;
    197 	dp->inp_vflag |= INP_IPV6;
    198 
    199 	error = dccp_doconnect(so, nam, l, 1);
    200 
    201 	if (error != 0)
    202 		goto bad;
    203 
    204 	callout_reset(&dp->retrans_timer, dp->retrans, dccp_retrans_t, dp);
    205 	callout_reset(&dp->connect_timer, DCCP_CONNECT_TIMER, dccp_connect_t, dp);
    206 
    207 	test[0] = dp->pref_cc;
    208 #if 0
    209 	/* FIX THIS LATER */
    210 	if (dp->pref_cc == 2) {
    211 		test[1] = 3;
    212 	} else {
    213 		test[1] = 2;
    214 	}
    215 	dccp_add_feature(dp, DCCP_OPT_CHANGE, DCCP_FEATURE_CC, test, 2);
    216 	dccp_add_feature(dp, DCCP_OPT_PREFER, DCCP_FEATURE_CC, test, 2);
    217 #else
    218 	 /* we only support CCID2 at this moment */
    219 	dccp_add_feature(dp, DCCP_OPT_CHANGE_R, DCCP_FEATURE_CC, test, 1);
    220 #endif
    221 
    222 	error = dccp_output(dp, 0);
    223 
    224 bad:
    225 	INP_UNLOCK(inp);
    226 	INP_INFO_WUNLOCK(&dccpbinfo);
    227 	return error;
    228 }
    229 
    230 
    231 int
    232 dccp6_listen(struct socket *so, struct lwp *l)
    233 {
    234 	struct in6pcb *in6p;
    235 	struct dccpcb *dp;
    236 	int error = 0;
    237 
    238 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_listen!\n"));
    239 
    240 	INP_INFO_RLOCK(&dccpbinfo);
    241 	in6p = sotoin6pcb(so);
    242 	if (in6p == 0) {
    243 		INP_INFO_RUNLOCK(&dccpbinfo);
    244 		return EINVAL;
    245 	}
    246 	INP_LOCK(inp);
    247 	INP_INFO_RUNLOCK(&dccpbinfo);
    248 	dp = in6todccpcb(in6p);
    249 	DCCP_DEBUG((LOG_INFO, "Checking in6p->in6p_lport!\n"));
    250 	if (in6p->in6p_lport == 0) {
    251 		error = in6_pcbbind(in6p, NULL, l);
    252 	}
    253 	if (error == 0) {
    254 		dp->state = DCCPS_LISTEN;
    255 		dp->who = DCCP_LISTENER;
    256 		dp->seq_snd = 512;
    257 	}
    258 	INP_UNLOCK(inp);
    259 	return error;
    260 }
    261 
    262 int
    263 dccp6_accept(struct socket *so, struct sockaddr *nam)
    264 {
    265 	struct in6pcb *in6p = NULL;
    266 	int error = 0;
    267 
    268 	DCCP_DEBUG((LOG_INFO, "Entering dccp6_accept!\n"));
    269 	if (nam == NULL) {
    270 		return EINVAL;
    271 	}
    272 	if (so->so_state & SS_ISDISCONNECTED) {
    273 		DCCP_DEBUG((LOG_INFO, "so_state && SS_ISDISCONNECTED!, so->state = %i\n", so->so_state));
    274 		return ECONNABORTED;
    275 	}
    276 
    277 	INP_INFO_RLOCK(&dccpbinfo);
    278 	in6p = sotoin6pcb(so);
    279 	if (in6p == 0) {
    280 		INP_INFO_RUNLOCK(&dccpbinfo);
    281 		return EINVAL;
    282 	}
    283 	INP_LOCK(inp);
    284 	INP_INFO_RUNLOCK(&dccpbinfo);
    285 	in6_setpeeraddr(in6p, (struct sockaddr_in6 *)nam);
    286 
    287 	INP_UNLOCK(inp);
    288 	return error;
    289 }
    290 
    291 static int
    292 dccp6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
    293 {
    294 	int error = 0;
    295 	int family;
    296 
    297 	family = so->so_proto->pr_domain->dom_family;
    298 	switch (family) {
    299 	case PF_INET6:
    300 		error = in6_control(so, cmd, nam, ifp);
    301 		break;
    302 	default:
    303 		error =	 EAFNOSUPPORT;
    304 	}
    305 	return (error);
    306 }
    307 
    308 static int
    309 dccp6_stat(struct socket *so, struct stat *ub)
    310 {
    311 	return 0;
    312 }
    313 
    314 static int
    315 dccp6_purgeif(struct socket *so, struct ifnet *ifp)
    316 {
    317 	int s;
    318 
    319 	s = splsoftnet();
    320 	mutex_enter(softnet_lock);
    321 	in6_pcbpurgeif0(&dccpbtable, ifp);
    322 	in6_purgeif(ifp);
    323 	in6_pcbpurgeif(&dccpbtable, ifp);
    324 	mutex_exit(softnet_lock);
    325 	splx(s);
    326 
    327 	return 0;
    328 }
    329 
    330 static int
    331 dccp6_attach(struct socket *so, int proto)
    332 {
    333 	return dccp_attach(so, proto);
    334 }
    335 
    336 static int
    337 dccp6_detach(struct socket *so)
    338 {
    339 	return dccp_detach(so);
    340 }
    341 
    342 static int
    343 dccp6_connect2(struct socket *so, struct socket *so2)
    344 {
    345 	KASSERT(solocked(so));
    346 
    347 	return EOPNOTSUPP;
    348 }
    349 
    350 static int
    351 dccp6_disconnect(struct socket *so)
    352 {
    353 	return dccp_disconnect(so);
    354 }
    355 
    356 static int
    357 dccp6_shutdown(struct socket *so)
    358 {
    359 	return dccp_shutdown(so);
    360 }
    361 
    362 static int
    363 dccp6_abort(struct socket *so)
    364 {
    365 	return dccp_abort(so);
    366 }
    367 
    368 
    369 static int
    370 dccp6_peeraddr(struct socket *so, struct sockaddr *nam)
    371 {
    372 	KASSERT(solocked(so));
    373 	KASSERT(sotoinpcb(so) != NULL);
    374 	KASSERT(nam != NULL);
    375 
    376 	in6_setpeeraddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
    377 	return 0;
    378 }
    379 
    380 static int
    381 dccp6_sockaddr(struct socket *so, struct sockaddr *nam)
    382 {
    383 	KASSERT(solocked(so));
    384 	KASSERT(sotoinpcb(so) != NULL);
    385 	KASSERT(nam != NULL);
    386 
    387 	in6_setsockaddr(sotoin6pcb(so), (struct sockaddr_in6 *)nam);
    388 	return 0;
    389 }
    390 
    391 static int
    392 dccp6_recvoob(struct socket *so, struct mbuf *m, int flags)
    393 {
    394 	KASSERT(solocked(so));
    395 
    396 	return EOPNOTSUPP;
    397 }
    398 
    399 static int
    400 dccp6_rcvd(struct socket *so, int flags, struct lwp *l)
    401 {
    402 	KASSERT(solocked(so));
    403 
    404 	return EOPNOTSUPP;
    405 }
    406 
    407 static int
    408 dccp6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
    409     struct mbuf *control, struct lwp *l)
    410 {
    411 	return dccp_send(so, m, nam, control, l);
    412 }
    413 
    414 static int
    415 dccp6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
    416 {
    417 	KASSERT(solocked(so));
    418 
    419 	m_freem(m);
    420 	m_freem(control);
    421 
    422 	return EOPNOTSUPP;
    423 }
    424 
    425 
    426 PR_WRAP_USRREQS(dccp6)
    427 #define	dccp6_attach		dccp6_attach_wrapper
    428 #define	dccp6_detach		dccp6_detach_wrapper
    429 #define dccp6_accept		dccp6_accept_wrapper
    430 #define	dccp6_bind		dccp6_bind_wrapper
    431 #define	dccp6_listen		dccp6_listen_wrapper
    432 #define	dccp6_connect		dccp6_connect_wrapper
    433 #define	dccp6_connect2		dccp6_connect2_wrapper
    434 #define	dccp6_disconnect	dccp6_disconnect_wrapper
    435 #define	dccp6_shutdown		dccp6_shutdown_wrapper
    436 #define	dccp6_abort		dccp6_abort_wrapper
    437 #define	dccp6_ioctl		dccp6_ioctl_wrapper
    438 #define	dccp6_stat		dccp6_stat_wrapper
    439 #define	dccp6_peeraddr		dccp6_peeraddr_wrapper
    440 #define	dccp6_sockaddr		dccp6_sockaddr_wrapper
    441 #define	dccp6_rcvd		dccp6_rcvd_wrapper
    442 #define	dccp6_recvoob		dccp6_recvoob_wrapper
    443 #define	dccp6_send		dccp6_send_wrapper
    444 #define	dccp6_sendoob		dccp6_sendoob_wrapper
    445 #define	dccp6_purgeif		dccp6_purgeif_wrapper
    446 
    447 const struct pr_usrreqs dccp6_usrreqs = {
    448 	.pr_attach	= dccp6_attach,
    449 	.pr_detach	= dccp6_detach,
    450 	.pr_accept	= dccp6_accept,
    451 	.pr_bind	= dccp6_bind,
    452 	.pr_listen	= dccp6_listen,
    453 	.pr_connect	= dccp6_connect,
    454 	.pr_connect2	= dccp6_connect2,
    455 	.pr_disconnect	= dccp6_disconnect,
    456 	.pr_shutdown	= dccp6_shutdown,
    457 	.pr_abort	= dccp6_abort,
    458 	.pr_ioctl	= dccp6_ioctl,
    459 	.pr_stat	= dccp6_stat,
    460 	.pr_peeraddr	= dccp6_peeraddr,
    461 	.pr_sockaddr	= dccp6_sockaddr,
    462 	.pr_rcvd	= dccp6_rcvd,
    463 	.pr_recvoob	= dccp6_recvoob,
    464 	.pr_send	= dccp6_send,
    465 	.pr_sendoob	= dccp6_sendoob,
    466 	.pr_purgeif	= dccp6_purgeif,
    467 };
    468