File: [cvs.NetBSD.org] / src / sys / netinet6 / sctp6_usrreq.c (download)
Revision 1.14, Tue Oct 17 19:23:42 2017 UTC (6 years, 6 months ago) by rjs
Branch: MAIN
CVS Tags: tls-maxphys-base-20171202
Branch point for: tls-maxphys
Changes since 1.13: +5 -2
lines
Make SCTP work when IPSEC is also defined.
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/* $KAME: sctp6_usrreq.c,v 1.38 2005/08/24 08:08:56 suz Exp $ */
/* $NetBSD: sctp6_usrreq.c,v 1.14 2017/10/17 19:23:42 rjs Exp $ */
/*
* Copyright (c) 2001, 2002, 2003, 2004 Cisco Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Cisco Systems, Inc.
* 4. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL CISCO SYSTEMS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sctp6_usrreq.c,v 1.14 2017/10/17 19:23:42 rjs Exp $");
#ifdef _KERNEL_OPT
#include "opt_inet.h"
#include "opt_ipsec.h"
#include "opt_sctp.h"
#include "opt_net_mpsafe.h"
#endif /* _KERNEL_OPT */
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/malloc.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/systm.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctp_header.h>
#include <netinet/sctp_var.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_input.h>
#include <netinet/sctp_asconf.h>
#include <netinet6/ip6_var.h>
#include <netinet6/scope6_var.h>
#include <netinet/ip6.h>
#include <netinet6/in6_pcb.h>
#include <netinet/icmp6.h>
#include <netinet6/sctp6_var.h>
#include <netinet6/ip6protosw.h>
#ifdef IPSEC
#include <netipsec/ipsec.h>
#include <netipsec/ipsec6.h>
#endif /*IPSEC*/
#if defined(NFAITH) && NFAITH > 0
#include <net/if_faith.h>
#endif
#include <net/net_osdep.h>
#if defined(HAVE_NRL_INPCB) || defined(__FreeBSD__)
#ifndef in6pcb
#define in6pcb inpcb
#endif
#ifndef sotoin6pcb
#define sotoin6pcb sotoinpcb
#endif
#endif
#ifdef SCTP_DEBUG
extern u_int32_t sctp_debug_on;
#endif
static int sctp6_detach(struct socket *so);
extern int sctp_no_csum_on_loopback;
int
sctp6_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m = *mp;
struct ip6_hdr *ip6;
struct sctphdr *sh;
struct sctp_inpcb *in6p = NULL;
struct sctp_nets *net;
int refcount_up = 0;
u_int32_t check, calc_check;
struct inpcb *in6p_ip;
struct sctp_chunkhdr *ch;
struct mbuf *opts = NULL;
int length, mlen, offset, iphlen;
u_int8_t ecn_bits;
struct sctp_tcb *stcb = NULL;
int off = *offp;
int s;
ip6 = mtod(m, struct ip6_hdr *);
/* Ensure that (sctphdr + sctp_chunkhdr) in a row. */
IP6_EXTHDR_GET(sh, struct sctphdr *, m, off, sizeof(*sh) + sizeof(*ch));
if (sh == NULL) {
sctp_pegs[SCTP_HDR_DROPS]++;
return IPPROTO_DONE;
}
ch = (struct sctp_chunkhdr *)((vaddr_t)sh + sizeof(struct sctphdr));
iphlen = off;
offset = iphlen + sizeof(*sh) + sizeof(*ch);
#if defined(NFAITH) && NFAITH > 0
if (faithprefix(&ip6->ip6_dst))
goto bad;
#endif /* NFAITH defined and > 0 */
sctp_pegs[SCTP_INPKTS]++;
#ifdef SCTP_DEBUG
if (sctp_debug_on & SCTP_DEBUG_INPUT1) {
printf("V6 input gets a packet iphlen:%d pktlen:%d\n", iphlen, m->m_pkthdr.len);
}
#endif
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
/* No multi-cast support in SCTP */
sctp_pegs[SCTP_IN_MCAST]++;
goto bad;
}
/* destination port of 0 is illegal, based on RFC2960. */
if (sh->dest_port == 0)
goto bad;
if ((sctp_no_csum_on_loopback == 0) ||
(m_get_rcvif_NOMPSAFE(m) == NULL) ||
(m_get_rcvif_NOMPSAFE(m)->if_type != IFT_LOOP)) {
/* we do NOT validate things from the loopback if the
* sysctl is set to 1.
*/
check = sh->checksum; /* save incoming checksum */
if ((check == 0) && (sctp_no_csum_on_loopback)) {
/* special hook for where we got a local address
* somehow routed across a non IFT_LOOP type interface
*/
if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src, &ip6->ip6_dst))
goto sctp_skip_csum;
}
sh->checksum = 0; /* prepare for calc */
calc_check = sctp_calculate_sum(m, &mlen, iphlen);
if (calc_check != check) {
#ifdef SCTP_DEBUG
if (sctp_debug_on & SCTP_DEBUG_INPUT1) {
printf("Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
calc_check, check, m,
mlen, iphlen);
}
#endif
stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch),
sh, ch, &in6p, &net);
/* in6p's ref-count increased && stcb locked */
if ((in6p) && (stcb)) {
sctp_send_packet_dropped(stcb, net, m, iphlen, 1);
sctp_chunk_output((struct sctp_inpcb *)in6p, stcb, 2);
} else if ((in6p != NULL) && (stcb == NULL)) {
refcount_up = 1;
}
sctp_pegs[SCTP_BAD_CSUM]++;
goto bad;
}
sh->checksum = calc_check;
} else {
sctp_skip_csum:
mlen = m->m_pkthdr.len;
}
net = NULL;
/*
* Locate pcb and tcb for datagram
* sctp_findassociation_addr() wants IP/SCTP/first chunk header...
*/
#ifdef SCTP_DEBUG
if (sctp_debug_on & SCTP_DEBUG_INPUT1) {
printf("V6 Find the association\n");
}
#endif
stcb = sctp_findassociation_addr(m, iphlen, offset - sizeof(*ch),
sh, ch, &in6p, &net);
/* in6p's ref-count increased */
if (in6p == NULL) {
struct sctp_init_chunk *init_chk, chunk_buf;
sctp_pegs[SCTP_NOPORTS]++;
if (ch->chunk_type == SCTP_INITIATION) {
/* we do a trick here to get the INIT tag,
* dig in and get the tag from the INIT and
* put it in the common header.
*/
init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
iphlen + sizeof(*sh), sizeof(*init_chk),
(u_int8_t *)&chunk_buf);
sh->v_tag = init_chk->init.initiate_tag;
}
sctp_send_abort(m, iphlen, sh, 0, NULL);
goto bad;
} else if (stcb == NULL) {
refcount_up = 1;
}
in6p_ip = (struct inpcb *)in6p;
#ifdef IPSEC
/*
* Check AH/ESP integrity.
*/
if (ipsec_used && ipsec6_in_reject(m, (struct in6pcb *)in6p_ip)) {
/* XXX */
#if 0
/* FIX ME: need to find right stat */
ipsec6stat.in_polvio++;
#endif
goto bad;
}
#endif /*IPSEC*/
/*
* Construct sockaddr format source address.
* Stuff source address and datagram in user buffer.
*/
if ((in6p->ip_inp.inp.inp_flags & INP_CONTROLOPTS)
#ifndef __OpenBSD__
|| (in6p->sctp_socket->so_options & SO_TIMESTAMP)
#endif
) {
#if defined(__FreeBSD__) || defined(__APPLE__)
#if (defined(SCTP_BASE_FREEBSD) && __FreeBSD_version < 501113) || defined(__APPLE__)
ip6_savecontrol(in6p_ip, &opts, ip6, m);
#elif __FreeBSD_version >= 440000 || (defined(SCTP_BASE_FREEBSD) && __FreeBSD_version >= 501113)
ip6_savecontrol(in6p_ip, m, &opts);
#else
ip6_savecontrol(in6p_ip, m, &opts, NULL);
#endif
#elif defined(__NetBSD__)
ip6_savecontrol((struct in6pcb *)in6p_ip, &opts, ip6, m);
#else
ip6_savecontrol((struct in6pcb *)in6p_ip, m, &opts);
#endif
}
/*
* CONTROL chunk processing
*/
length = ntohs(ip6->ip6_plen) + iphlen;
offset -= sizeof(*ch);
ecn_bits = ((ntohl(ip6->ip6_flow) >> 20) & 0x000000ff);
s = splsoftnet();
(void)sctp_common_input_processing(&m, iphlen, offset, length, sh, ch,
in6p, stcb, net, ecn_bits);
/* inp's ref-count reduced && stcb unlocked */
splx(s);
/* XXX this stuff below gets moved to appropriate parts later... */
if (m)
m_freem(m);
if (opts)
m_freem(opts);
if ((in6p) && refcount_up){
/* reduce ref-count */
SCTP_INP_WLOCK(in6p);
SCTP_INP_DECR_REF(in6p);
SCTP_INP_WUNLOCK(in6p);
}
return IPPROTO_DONE;
bad:
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
if ((in6p) && refcount_up){
/* reduce ref-count */
SCTP_INP_WLOCK(in6p);
SCTP_INP_DECR_REF(in6p);
SCTP_INP_WUNLOCK(in6p);
}
if (m) {
m_freem(m);
}
if (opts) {
m_freem(opts);
}
return IPPROTO_DONE;
}
static void
sctp6_notify_mbuf(struct sctp_inpcb *inp,
struct icmp6_hdr *icmp6,
struct sctphdr *sh,
struct sctp_tcb *stcb,
struct sctp_nets *net)
{
unsigned int nxtsz;
if ((inp == NULL) || (stcb == NULL) || (net == NULL) ||
(icmp6 == NULL) || (sh == NULL)) {
goto out;
}
/* First do we even look at it? */
if (ntohl(sh->v_tag) != (stcb->asoc.peer_vtag))
goto out;
if (icmp6->icmp6_type != ICMP6_PACKET_TOO_BIG) {
/* not PACKET TO BIG */
goto out;
}
/*
* ok we need to look closely. We could even get smarter and
* look at anyone that we sent to in case we get a different
* ICMP that tells us there is no way to reach a host, but for
* this impl, all we care about is MTU discovery.
*/
nxtsz = ntohl(icmp6->icmp6_mtu);
/* Stop any PMTU timer */
sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
/* Adjust destination size limit */
if (net->mtu > nxtsz) {
net->mtu = nxtsz;
}
/* now what about the ep? */
if (stcb->asoc.smallest_mtu > nxtsz) {
struct sctp_tmit_chunk *chk;
struct sctp_stream_out *strm;
/* Adjust that too */
stcb->asoc.smallest_mtu = nxtsz;
/* now off to subtract IP_DF flag if needed */
TAILQ_FOREACH(chk, &stcb->asoc.send_queue, sctp_next) {
if ((chk->send_size+IP_HDR_SIZE) > nxtsz) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if ((chk->send_size+IP_HDR_SIZE) > nxtsz) {
/*
* For this guy we also mark for immediate
* resend since we sent to big of chunk
*/
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
if (chk->sent != SCTP_DATAGRAM_RESEND)
stcb->asoc.sent_queue_retran_cnt++;
chk->sent = SCTP_DATAGRAM_RESEND;
chk->rec.data.doing_fast_retransmit = 0;
chk->sent = SCTP_DATAGRAM_RESEND;
/* Clear any time so NO RTT is being done */
chk->sent_rcv_time.tv_sec = 0;
chk->sent_rcv_time.tv_usec = 0;
stcb->asoc.total_flight -= chk->send_size;
net->flight_size -= chk->send_size;
}
}
TAILQ_FOREACH(strm, &stcb->asoc.out_wheel, next_spoke) {
TAILQ_FOREACH(chk, &strm->outqueue, sctp_next) {
if ((chk->send_size+IP_HDR_SIZE) > nxtsz) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
}
}
sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, NULL);
out:
if (inp) {
/* reduce inp's ref-count */
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
}
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
}
void *
sctp6_ctlinput(int cmd, const struct sockaddr *pktdst, void *d)
{
struct sctphdr sh;
struct ip6ctlparam *ip6cp = NULL;
int s, cm;
if (pktdst->sa_family != AF_INET6 ||
pktdst->sa_len != sizeof(struct sockaddr_in6))
return NULL;
if ((unsigned)cmd >= PRC_NCMDS)
return NULL;
if (PRC_IS_REDIRECT(cmd)) {
d = NULL;
} else if (inet6ctlerrmap[cmd] == 0) {
return NULL;
}
/* if the parameter is from icmp6, decode it. */
if (d != NULL) {
ip6cp = (struct ip6ctlparam *)d;
} else {
ip6cp = (struct ip6ctlparam *)NULL;
}
if (ip6cp) {
/*
* XXX: We assume that when IPV6 is non NULL,
* M and OFF are valid.
*/
/* check if we can safely examine src and dst ports */
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
struct sockaddr_in6 final;
if (ip6cp->ip6c_m == NULL ||
(size_t)ip6cp->ip6c_m->m_pkthdr.len < (ip6cp->ip6c_off + sizeof(sh)))
return NULL;
memset(&sh, 0, sizeof(sh));
memset(&final, 0, sizeof(final));
inp = NULL;
net = NULL;
m_copydata(ip6cp->ip6c_m, ip6cp->ip6c_off, sizeof(sh),
(void *)&sh);
ip6cp->ip6c_src->sin6_port = sh.src_port;
final.sin6_len = sizeof(final);
final.sin6_family = AF_INET6;
final.sin6_addr = ((const struct sockaddr_in6 *)pktdst)->sin6_addr;
final.sin6_port = sh.dest_port;
s = splsoftnet();
stcb = sctp_findassociation_addr_sa(sin6tosa(ip6cp->ip6c_src),
sin6tosa(&final),
&inp, &net, 1);
/* inp's ref-count increased && stcb locked */
if (stcb != NULL && inp && (inp->sctp_socket != NULL)) {
if (cmd == PRC_MSGSIZE) {
sctp6_notify_mbuf(inp,
ip6cp->ip6c_icmp6,
&sh,
stcb,
net);
/* inp's ref-count reduced && stcb unlocked */
} else {
if (cmd == PRC_HOSTDEAD) {
cm = EHOSTUNREACH;
} else {
cm = inet6ctlerrmap[cmd];
}
sctp_notify(inp, cm, &sh, sin6tosa(&final),
stcb, net);
/* inp's ref-count reduced && stcb unlocked */
}
} else {
if (PRC_IS_REDIRECT(cmd) && inp) {
in6_rtchange((struct in6pcb *)inp,
inet6ctlerrmap[cmd]);
}
if (inp) {
/* reduce inp's ref-count */
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
}
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
}
splx(s);
}
return NULL;
}
/*
* this routine can probably be collasped into the one in sctp_userreq.c
* since they do the same thing and now we lookup with a sockaddr
*/
#ifdef __FreeBSD__
static int
sctp6_getcred(SYSCTL_HANDLER_ARGS)
{
struct sockaddr_in6 addrs[2];
struct sctp_inpcb *inp;
struct sctp_nets *net;
struct sctp_tcb *stcb;
int error, s;
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
error = suser(req->td);
#else
error = suser(req->p);
#endif
if (error)
return (error);
if (req->newlen != sizeof(addrs))
return (EINVAL);
if (req->oldlen != sizeof(struct ucred))
return (EINVAL);
error = SYSCTL_IN(req, addrs, sizeof(addrs));
if (error)
return (error);
s = splsoftnet();
stcb = sctp_findassociation_addr_sa(sin6tosa(&addrs[0]),
sin6tosa(&addrs[1]),
&inp, &net, 1);
if (stcb == NULL || inp == NULL || inp->sctp_socket == NULL) {
error = ENOENT;
if (inp) {
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
}
goto out;
}
error = SYSCTL_OUT(req, inp->sctp_socket->so_cred,
sizeof(struct ucred));
SCTP_TCB_UNLOCK (stcb);
out:
splx(s);
return (error);
}
SYSCTL_PROC(_net_inet6_sctp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
0, 0,
sctp6_getcred, "S,ucred", "Get the ucred of a SCTP6 connection");
#endif
/* This is the same as the sctp_abort() could be made common */
static int
sctp6_abort(struct socket *so)
{
int s;
struct sctp_inpcb *inp;
KASSERT(solocked(so));
s = splsoftnet();
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == 0)
return EINVAL; /* ??? possible? panic instead? */
soisdisconnected(so);
sctp_inpcb_free(inp, 1);
splx(s);
return 0;
}
static int
sctp6_attach(struct socket *so, int proto)
{
struct in6pcb *inp6;
int error;
struct sctp_inpcb *inp;
sosetlock(so);
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp != NULL)
return EINVAL;
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
error = soreserve(so, sctp_sendspace, sctp_recvspace);
if (error)
return error;
}
error = sctp_inpcb_alloc(so);
if (error)
return error;
inp = (struct sctp_inpcb *)so->so_pcb;
inp->sctp_flags |= SCTP_PCB_FLAGS_BOUND_V6; /* I'm v6! */
inp6 = (struct in6pcb *)inp;
inp->inp_vflag |= INP_IPV6;
if (ip6_v6only) {
inp6->in6p_flags |= IN6P_IPV6_V6ONLY;
}
so->so_send = sctp_sosend;
#ifdef IPSEC
inp6->in6p_af = proto;
#endif
inp6->in6p_hops = -1; /* use kernel default */
inp6->in6p_cksum = -1; /* just to be sure */
#ifdef INET
/*
* XXX: ugly!!
* IPv4 TTL initialization is necessary for an IPv6 socket as well,
* because the socket may be bound to an IPv6 wildcard address,
* which may match an IPv4-mapped IPv6 address.
*/
inp->inp_ip_ttl = ip_defttl;
#endif
/*
* Hmm what about the IPSEC stuff that is missing here but
* in sctp_attach()?
*/
return 0;
}
static int
sctp6_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
{
struct sctp_inpcb *inp;
struct in6pcb *inp6;
int error;
KASSERT(solocked(so));
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == 0)
return EINVAL;
inp6 = (struct in6pcb *)inp;
inp->inp_vflag &= ~INP_IPV4;
inp->inp_vflag |= INP_IPV6;
if (nam != NULL && (inp6->in6p_flags & IN6P_IPV6_V6ONLY) == 0) {
if (nam->sa_family == AF_INET) {
/* binding v4 addr to v6 socket, so reset flags */
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
} else {
struct sockaddr_in6 *sin6_p;
sin6_p = (struct sockaddr_in6 *)nam;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) {
inp->inp_vflag |= INP_IPV4;
}
else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
struct sockaddr_in sin;
in6_sin6_2_sin(&sin, sin6_p);
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
error = sctp_inpcb_bind(so, (struct sockaddr *)&sin, l);
return error;
}
}
} else if (nam != NULL) {
/* IPV6_V6ONLY socket */
if (nam->sa_family == AF_INET) {
/* can't bind v4 addr to v6 only socket! */
return EINVAL;
} else {
struct sockaddr_in6 *sin6_p;
sin6_p = (struct sockaddr_in6 *)nam;
if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr))
/* can't bind v4-mapped addrs either! */
/* NOTE: we don't support SIIT */
return EINVAL;
}
}
error = sctp_inpcb_bind(so, nam, l);
return error;
}
/*This could be made common with sctp_detach() since they are identical */
static int
sctp6_detach(struct socket *so)
{
struct sctp_inpcb *inp;
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == 0)
return EINVAL;
if (((so->so_options & SO_LINGER) && (so->so_linger == 0)) ||
(so->so_rcv.sb_cc > 0))
sctp_inpcb_free(inp, 1);
else
sctp_inpcb_free(inp, 0);
return 0;
}
static int
sctp6_disconnect(struct socket *so)
{
struct sctp_inpcb *inp;
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
return (ENOTCONN);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
if (LIST_EMPTY(&inp->sctp_asoc_list)) {
/* No connection */
return (ENOTCONN);
} else {
int some_on_streamwheel = 0;
struct sctp_association *asoc;
struct sctp_tcb *stcb;
stcb = LIST_FIRST(&inp->sctp_asoc_list);
if (stcb == NULL) {
return (EINVAL);
}
asoc = &stcb->asoc;
if (!TAILQ_EMPTY(&asoc->out_wheel)) {
/* Check to see if some data queued */
struct sctp_stream_out *outs;
TAILQ_FOREACH(outs, &asoc->out_wheel,
next_spoke) {
if (!TAILQ_EMPTY(&outs->outqueue)) {
some_on_streamwheel = 1;
break;
}
}
}
if (TAILQ_EMPTY(&asoc->send_queue) &&
TAILQ_EMPTY(&asoc->sent_queue) &&
(some_on_streamwheel == 0)) {
/* nothing queued to send, so I'm done... */
if ((SCTP_GET_STATE(asoc) !=
SCTP_STATE_SHUTDOWN_SENT) &&
(SCTP_GET_STATE(asoc) !=
SCTP_STATE_SHUTDOWN_ACK_SENT)) {
/* only send SHUTDOWN the first time */
#ifdef SCTP_DEBUG
if (sctp_debug_on & SCTP_DEBUG_OUTPUT4) {
printf("%s:%d sends a shutdown\n",
__FILE__,
__LINE__
);
}
#endif
sctp_send_shutdown(stcb, stcb->asoc.primary_destination);
sctp_chunk_output(stcb->sctp_ep, stcb, 1);
asoc->state = SCTP_STATE_SHUTDOWN_SENT;
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN,
stcb->sctp_ep, stcb,
asoc->primary_destination);
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
stcb->sctp_ep, stcb,
asoc->primary_destination);
}
} else {
/*
* we still got (or just got) data to send,
* so set SHUTDOWN_PENDING
*/
/*
* XXX sockets draft says that MSG_EOF should
* be sent with no data. currently, we will
* allow user data to be sent first and move
* to SHUTDOWN-PENDING
*/
asoc->state |= SCTP_STATE_SHUTDOWN_PENDING;
}
return (0);
}
} else {
/* UDP model does not support this */
return EOPNOTSUPP;
}
}
static int
sctp6_recvoob(struct socket *so, struct mbuf *m, int flags)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
sctp6_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, struct lwp *l)
{
struct sctp_inpcb *inp;
struct in6pcb *inp6;
#ifdef INET
struct sockaddr_in6 *sin6;
#endif /* INET */
/* No SPL needed since sctp_output does this */
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
if (control) {
m_freem(control);
control = NULL;
}
m_freem(m);
return EINVAL;
}
inp6 = (struct in6pcb *)inp;
/* For the TCP model we may get a NULL addr, if we
* are a connected socket thats ok.
*/
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) &&
(nam == NULL)) {
goto connected_type;
}
if (nam == NULL) {
m_freem(m);
if (control) {
m_freem(control);
control = NULL;
}
return (EDESTADDRREQ);
}
#ifdef INET
sin6 = (struct sockaddr_in6 *)nam;
if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) {
/*
* if IPV6_V6ONLY flag, we discard datagrams
* destined to a v4 addr or v4-mapped addr
*/
if (nam->sa_family == AF_INET) {
return EINVAL;
}
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
return EINVAL;
}
}
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
if (!ip6_v6only) {
struct sockaddr_in sin;
/* convert v4-mapped into v4 addr and send */
in6_sin6_2_sin(&sin, sin6);
return sctp_send(so, m, (struct sockaddr *)&sin,
control, l);
} else {
/* mapped addresses aren't enabled */
return EINVAL;
}
}
#endif /* INET */
connected_type:
/* now what about control */
if (control) {
if (inp->control) {
printf("huh? control set?\n");
m_freem(inp->control);
inp->control = NULL;
}
inp->control = control;
}
/* add it in possibly */
if ((inp->pkt) &&
(inp->pkt->m_flags & M_PKTHDR)) {
struct mbuf *x;
int c_len;
c_len = 0;
/* How big is it */
for (x=m;x;x = x->m_next) {
c_len += x->m_len;
}
inp->pkt->m_pkthdr.len += c_len;
}
/* Place the data */
if (inp->pkt) {
inp->pkt_last->m_next = m;
inp->pkt_last = m;
} else {
inp->pkt_last = inp->pkt = m;
}
if ((so->so_state & SS_MORETOCOME) == 0) {
/*
* note with the current version this code will only be
* used by OpenBSD, NetBSD and FreeBSD have methods for
* re-defining sosend() to use sctp_sosend(). One can
* optionaly switch back to this code (by changing back
* the defininitions but this is not advisable.
*/
int ret;
ret = sctp_output(inp, inp->pkt , nam, inp->control, l, 0);
inp->pkt = NULL;
inp->control = NULL;
return (ret);
} else {
return (0);
}
}
static int
sctp6_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
{
KASSERT(solocked(so));
if (m)
m_freem(m);
if (control)
m_freem(control);
return EOPNOTSUPP;
}
static int
sctp6_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
{
int error = 0;
struct sctp_inpcb *inp;
struct in6pcb *inp6;
struct sctp_tcb *stcb;
#ifdef INET
struct sockaddr_in6 *sin6;
struct sockaddr_storage ss;
#endif /* INET */
inp6 = (struct in6pcb *)so->so_pcb;
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == 0) {
return (ECONNRESET); /* I made the same as TCP since
* we are not setup? */
}
SCTP_ASOC_CREATE_LOCK(inp);
SCTP_INP_RLOCK(inp);
if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) ==
SCTP_PCB_FLAGS_UNBOUND) {
/* Bind a ephemeral port */
SCTP_INP_RUNLOCK(inp);
error = sctp6_bind(so, NULL, l);
if (error) {
SCTP_ASOC_CREATE_UNLOCK(inp);
return (error);
}
SCTP_INP_RLOCK(inp);
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
(inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED)) {
/* We are already connected AND the TCP model */
SCTP_INP_RUNLOCK(inp);
SCTP_ASOC_CREATE_UNLOCK(inp);
return (EADDRINUSE);
}
#ifdef INET
sin6 = (struct sockaddr_in6 *)nam;
if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) {
/*
* if IPV6_V6ONLY flag, ignore connections
* destined to a v4 addr or v4-mapped addr
*/
if (nam->sa_family == AF_INET) {
SCTP_INP_RUNLOCK(inp);
SCTP_ASOC_CREATE_UNLOCK(inp);
return EINVAL;
}
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
SCTP_INP_RUNLOCK(inp);
SCTP_ASOC_CREATE_UNLOCK(inp);
return EINVAL;
}
}
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
if (!ip6_v6only) {
/* convert v4-mapped into v4 addr */
in6_sin6_2_sin((struct sockaddr_in *)&ss, sin6);
nam = (struct sockaddr *)&ss;
} else {
/* mapped addresses aren't enabled */
SCTP_INP_RUNLOCK(inp);
SCTP_ASOC_CREATE_UNLOCK(inp);
return EINVAL;
}
}
#endif /* INET */
/* Now do we connect? */
if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
stcb = LIST_FIRST(&inp->sctp_asoc_list);
if (stcb) {
SCTP_TCB_UNLOCK (stcb);
}
SCTP_INP_RUNLOCK(inp);
} else {
SCTP_INP_RUNLOCK(inp);
SCTP_INP_WLOCK(inp);
SCTP_INP_INCR_REF(inp);
SCTP_INP_WUNLOCK(inp);
stcb = sctp_findassociation_ep_addr(&inp, nam, NULL, NULL, NULL);
if (stcb == NULL) {
SCTP_INP_WLOCK(inp);
SCTP_INP_DECR_REF(inp);
SCTP_INP_WUNLOCK(inp);
}
}
if (stcb != NULL) {
/* Already have or am bring up an association */
SCTP_ASOC_CREATE_UNLOCK(inp);
SCTP_TCB_UNLOCK (stcb);
return (EALREADY);
}
/* We are GOOD to go */
stcb = sctp_aloc_assoc(inp, nam, 1, &error, 0);
SCTP_ASOC_CREATE_UNLOCK(inp);
if (stcb == NULL) {
/* Gak! no memory */
return (error);
}
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
/* Set the connected flag so we can queue data */
soisconnecting(so);
}
stcb->asoc.state = SCTP_STATE_COOKIE_WAIT;
SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
sctp_send_initiate(inp, stcb);
SCTP_TCB_UNLOCK (stcb);
return error;
}
static int
sctp6_connect2(struct socket *so, struct socket *so2)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
sctp6_getaddr(struct socket *so, struct sockaddr *nam)
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
struct sctp_inpcb *inp;
int error;
/*
* Do the malloc first in case it blocks.
*/
memset(sin6, 0, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
return ECONNRESET;
}
sin6->sin6_port = inp->sctp_lport;
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
/* For the bound all case you get back 0 */
if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
struct sctp_tcb *stcb;
const struct sockaddr_in6 *sin_a6;
struct sctp_nets *net;
int fnd;
stcb = LIST_FIRST(&inp->sctp_asoc_list);
if (stcb == NULL) {
goto notConn6;
}
fnd = 0;
sin_a6 = NULL;
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
sin_a6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro);
if (sin_a6->sin6_family == AF_INET6) {
fnd = 1;
break;
}
}
if ((!fnd) || (sin_a6 == NULL)) {
/* punt */
goto notConn6;
}
sin6->sin6_addr = sctp_ipv6_source_address_selection(
inp, stcb, &net->ro, net, 0);
} else {
/* For the bound all case you get back 0 */
notConn6:
memset(&sin6->sin6_addr, 0, sizeof(sin6->sin6_addr));
}
} else {
/* Take the first IPv6 address in the list */
struct sctp_laddr *laddr;
int fnd = 0;
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa->ifa_addr->sa_family == AF_INET6) {
struct sockaddr_in6 *sin_a;
sin_a = (struct sockaddr_in6 *)laddr->ifa->ifa_addr;
sin6->sin6_addr = sin_a->sin6_addr;
fnd = 1;
break;
}
}
if (!fnd) {
return ENOENT;
}
}
/* Scoping things for v6 */
if ((error = sa6_recoverscope(sin6)) != 0)
return (error);
return (0);
}
static int
sctp6_peeraddr(struct socket *so, struct sockaddr *nam)
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
int fnd, error;
const struct sockaddr_in6 *sin_a6;
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
/*
* Do the malloc first in case it blocks.
*/
inp = (struct sctp_inpcb *)so->so_pcb;
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
/* UDP type and listeners will drop out here */
return (ENOTCONN);
}
memset(sin6, 0, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
/* We must recapture incase we blocked */
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
return ECONNRESET;
}
stcb = LIST_FIRST(&inp->sctp_asoc_list);
if (stcb == NULL) {
return ECONNRESET;
}
fnd = 0;
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
sin_a6 = (const struct sockaddr_in6 *)rtcache_getdst(&net->ro);
if (sin_a6->sin6_family == AF_INET6) {
fnd = 1;
sin6->sin6_port = stcb->rport;
sin6->sin6_addr = sin_a6->sin6_addr;
break;
}
}
if (!fnd) {
/* No IPv4 address */
return ENOENT;
}
if ((error = sa6_recoverscope(sin6)) != 0)
return (error);
return (0);
}
static int
sctp6_sockaddr(struct socket *so, struct sockaddr *nam)
{
struct in6pcb *inp6 = sotoin6pcb(so);
int error;
if (inp6 == NULL)
return EINVAL;
/* allow v6 addresses precedence */
error = sctp6_getaddr(so, nam);
if (error) {
/* try v4 next if v6 failed */
error = sctp_sockaddr(so, nam);
if (error) {
return (error);
}
/* if I'm V6ONLY, convert it to v4-mapped */
if (inp6->in6p_flags & IN6P_IPV6_V6ONLY) {
struct sockaddr_in6 sin6;
in6_sin_2_v4mapsin6((struct sockaddr_in *)nam, &sin6);
memcpy(nam, &sin6, sizeof(struct sockaddr_in6));
}
}
return (error);
}
#if 0
static int
sctp6_getpeeraddr(struct socket *so, struct sockaddr *nam)
{
struct in6pcb *inp6 = sotoin6pcb(so);
int error;
if (inp6 == NULL)
return EINVAL;
/* allow v6 addresses precedence */
error = sctp6_peeraddr(so, nam);
if (error) {
/* try v4 next if v6 failed */
error = sctp_peeraddr(so, nam);
if (error) {
return (error);
}
/* if I'm V6ONLY, convert it to v4-mapped */
if ((inp6->in6p_flags & IN6P_IPV6_V6ONLY)) {
struct sockaddr_in6 sin6;
in6_sin_2_v4mapsin6((struct sockaddr_in *)addr, &sin6);
memcpy(addr, &sin6, sizeof(struct sockaddr_in6));
}
}
return error;
}
#endif
static int
sctp6_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
{
int error = 0;
int family;
family = so->so_proto->pr_domain->dom_family;
switch (family) {
#ifdef INET
case PF_INET:
error = in_control(so, cmd, nam, ifp);
break;
#endif
#ifdef INET6
case PF_INET6:
error = in6_control(so, cmd, nam, ifp);
break;
#endif
default:
error = EAFNOSUPPORT;
}
return (error);
}
static int
sctp6_accept(struct socket *so, struct sockaddr *nam)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
sctp6_stat(struct socket *so, struct stat *ub)
{
return 0;
}
static int
sctp6_listen(struct socket *so, struct lwp *l)
{
return sctp_listen(so, l);
}
static int
sctp6_shutdown(struct socket *so)
{
return sctp_shutdown(so);
}
static int
sctp6_rcvd(struct socket *so, int flags, struct lwp *l)
{
KASSERT(solocked(so));
return sctp_rcvd(so, flags, l);
}
static int
sctp6_purgeif(struct socket *so, struct ifnet *ifp)
{
struct ifaddr *ifa;
/* FIXME NOMPSAFE */
IFADDR_READER_FOREACH(ifa, ifp) {
if (ifa->ifa_addr->sa_family == PF_INET6) {
sctp_delete_ip_address(ifa);
}
}
#ifndef NET_MPSAFE
mutex_enter(softnet_lock);
#endif
in6_purgeif(ifp);
#ifndef NET_MPSAFE
mutex_exit(softnet_lock);
#endif
return 0;
}
PR_WRAP_USRREQS(sctp6)
#define sctp6_attach sctp6_attach_wrapper
#define sctp6_detach sctp6_detach_wrapper
#define sctp6_accept sctp6_accept_wrapper
#define sctp6_bind sctp6_bind_wrapper
#define sctp6_listen sctp6_listen_wrapper
#define sctp6_connect sctp6_connect_wrapper
#define sctp6_connect2 sctp6_connect2_wrapper
#define sctp6_disconnect sctp6_disconnect_wrapper
#define sctp6_shutdown sctp6_shutdown_wrapper
#define sctp6_abort sctp6_abort_wrapper
#define sctp6_ioctl sctp6_ioctl_wrapper
#define sctp6_stat sctp6_stat_wrapper
#define sctp6_peeraddr sctp6_peeraddr_wrapper
#define sctp6_sockaddr sctp6_sockaddr_wrapper
#define sctp6_rcvd sctp6_rcvd_wrapper
#define sctp6_recvoob sctp6_recvoob_wrapper
#define sctp6_send sctp6_send_wrapper
#define sctp6_sendoob sctp6_sendoob_wrapper
#define sctp6_purgeif sctp6_purgeif_wrapper
const struct pr_usrreqs sctp6_usrreqs = {
.pr_attach = sctp6_attach,
.pr_detach = sctp6_detach,
.pr_accept = sctp6_accept,
.pr_bind = sctp6_bind,
.pr_listen = sctp6_listen,
.pr_connect = sctp6_connect,
.pr_connect2 = sctp6_connect2,
.pr_disconnect = sctp6_disconnect,
.pr_shutdown = sctp6_shutdown,
.pr_abort = sctp6_abort,
.pr_ioctl = sctp6_ioctl,
.pr_stat = sctp6_stat,
.pr_peeraddr = sctp6_peeraddr,
.pr_sockaddr = sctp6_sockaddr,
.pr_rcvd = sctp6_rcvd,
.pr_recvoob = sctp6_recvoob,
.pr_send = sctp6_send,
.pr_sendoob = sctp6_sendoob,
.pr_purgeif = sctp6_purgeif,
};
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