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NetBSD/sys/netinet6/udp6_usrreq.c

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/* $NetBSD: udp6_usrreq.c,v 1.112 2014/08/05 05:24:27 rtr Exp $ */
/* $KAME: udp6_usrreq.c,v 1.86 2001/05/27 17:33:00 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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. 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 THE PROJECT 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 THE PROJECT 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.
*/
/*
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. 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. Neither the name of the University 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 THE REGENTS 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 THE REGENTS 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.
*
* @(#)udp_var.h 8.1 (Berkeley) 6/10/93
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: udp6_usrreq.c,v 1.112 2014/08/05 05:24:27 rtr Exp $");
#include "opt_inet.h"
#include "opt_inet_csum.h"
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <sys/domain.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/in_offload.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/in_pcb.h>
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <netinet/udp_private.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/ip6_private.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/udp6_var.h>
#include <netinet6/udp6_private.h>
#include <netinet6/ip6protosw.h>
#include <netinet6/scope6_var.h>
#include "faith.h"
#if defined(NFAITH) && NFAITH > 0
#include <net/if_faith.h>
#endif
/*
* UDP protocol implementation.
* Per RFC 768, August, 1980.
*/
extern struct inpcbtable udbtable;
percpu_t *udp6stat_percpu;
/* UDP on IP6 parameters */
static int udp6_sendspace = 9216; /* really max datagram size */
static int udp6_recvspace = 40 * (1024 + sizeof(struct sockaddr_in6));
/* 40 1K datagrams */
static void udp6_notify(struct in6pcb *, int);
static void sysctl_net_inet6_udp6_setup(struct sysctllog **);
#ifdef UDP_CSUM_COUNTERS
#include <sys/device.h>
struct evcnt udp6_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
NULL, "udp6", "hwcsum bad");
struct evcnt udp6_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
NULL, "udp6", "hwcsum ok");
struct evcnt udp6_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
NULL, "udp6", "hwcsum data");
struct evcnt udp6_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC,
NULL, "udp6", "swcsum");
EVCNT_ATTACH_STATIC(udp6_hwcsum_bad);
EVCNT_ATTACH_STATIC(udp6_hwcsum_ok);
EVCNT_ATTACH_STATIC(udp6_hwcsum_data);
EVCNT_ATTACH_STATIC(udp6_swcsum);
#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++
#else
#define UDP_CSUM_COUNTER_INCR(ev) /* nothing */
#endif
void
udp6_init(void)
{
sysctl_net_inet6_udp6_setup(NULL);
udp6stat_percpu = percpu_alloc(sizeof(uint64_t) * UDP6_NSTATS);
udp_init_common();
}
/*
* Notify a udp user of an asynchronous error;
* just wake up so that he can collect error status.
*/
static void
udp6_notify(struct in6pcb *in6p, int errno)
{
in6p->in6p_socket->so_error = errno;
sorwakeup(in6p->in6p_socket);
sowwakeup(in6p->in6p_socket);
}
void *
udp6_ctlinput(int cmd, const struct sockaddr *sa, void *d)
{
struct udphdr uh;
struct ip6_hdr *ip6;
const struct sockaddr_in6 *sa6 = (const struct sockaddr_in6 *)sa;
struct mbuf *m;
int off;
void *cmdarg;
struct ip6ctlparam *ip6cp = NULL;
const struct sockaddr_in6 *sa6_src = NULL;
void (*notify)(struct in6pcb *, int) = udp6_notify;
struct udp_portonly {
u_int16_t uh_sport;
u_int16_t uh_dport;
} *uhp;
if (sa->sa_family != AF_INET6 ||
sa->sa_len != sizeof(struct sockaddr_in6))
return NULL;
if ((unsigned)cmd >= PRC_NCMDS)
return NULL;
if (PRC_IS_REDIRECT(cmd))
notify = in6_rtchange, d = NULL;
else if (cmd == PRC_HOSTDEAD)
d = NULL;
else if (cmd == PRC_MSGSIZE) {
/* special code is present, see below */
notify = in6_rtchange;
}
else if (inet6ctlerrmap[cmd] == 0)
return NULL;
/* if the parameter is from icmp6, decode it. */
if (d != NULL) {
ip6cp = (struct ip6ctlparam *)d;
m = ip6cp->ip6c_m;
ip6 = ip6cp->ip6c_ip6;
off = ip6cp->ip6c_off;
cmdarg = ip6cp->ip6c_cmdarg;
sa6_src = ip6cp->ip6c_src;
} else {
m = NULL;
ip6 = NULL;
cmdarg = NULL;
sa6_src = &sa6_any;
off = 0;
}
if (ip6) {
/*
* XXX: We assume that when IPV6 is non NULL,
* M and OFF are valid.
*/
/* check if we can safely examine src and dst ports */
if (m->m_pkthdr.len < off + sizeof(*uhp)) {
if (cmd == PRC_MSGSIZE)
icmp6_mtudisc_update((struct ip6ctlparam *)d, 0);
return NULL;
}
memset(&uh, 0, sizeof(uh));
m_copydata(m, off, sizeof(*uhp), (void *)&uh);
if (cmd == PRC_MSGSIZE) {
int valid = 0;
/*
* Check to see if we have a valid UDP socket
* corresponding to the address in the ICMPv6 message
* payload.
*/
if (in6_pcblookup_connect(&udbtable, &sa6->sin6_addr,
uh.uh_dport, (const struct in6_addr *)&sa6_src->sin6_addr,
uh.uh_sport, 0, 0))
valid++;
#if 0
/*
* As the use of sendto(2) is fairly popular,
* we may want to allow non-connected pcb too.
* But it could be too weak against attacks...
* We should at least check if the local address (= s)
* is really ours.
*/
else if (in6_pcblookup_bind(&udbtable, &sa6->sin6_addr,
uh.uh_dport, 0))
valid++;
#endif
/*
* Depending on the value of "valid" and routing table
* size (mtudisc_{hi,lo}wat), we will:
* - recalculate the new MTU and create the
* corresponding routing entry, or
* - ignore the MTU change notification.
*/
icmp6_mtudisc_update((struct ip6ctlparam *)d, valid);
/*
* regardless of if we called
* icmp6_mtudisc_update(), we need to call
* in6_pcbnotify(), to notify path MTU change
* to the userland (RFC3542), because some
* unconnected sockets may share the same
* destination and want to know the path MTU.
*/
}
(void) in6_pcbnotify(&udbtable, sa, uh.uh_dport,
(const struct sockaddr *)sa6_src, uh.uh_sport, cmd, cmdarg,
notify);
} else {
(void) in6_pcbnotify(&udbtable, sa, 0,
(const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify);
}
return NULL;
}
int
udp6_ctloutput(int op, struct socket *so, struct sockopt *sopt)
{
int s;
int error = 0;
int family;
family = so->so_proto->pr_domain->dom_family;
s = splsoftnet();
switch (family) {
#ifdef INET
case PF_INET:
if (sopt->sopt_level != IPPROTO_UDP) {
error = ip_ctloutput(op, so, sopt);
goto end;
}
break;
#endif
#ifdef INET6
case PF_INET6:
if (sopt->sopt_level != IPPROTO_UDP) {
error = ip6_ctloutput(op, so, sopt);
goto end;
}
break;
#endif
default:
error = EAFNOSUPPORT;
goto end;
}
error = EINVAL;
end:
splx(s);
return error;
}
static void
udp6_sendup(struct mbuf *m, int off /* offset of data portion */,
struct sockaddr *src, struct socket *so)
{
struct mbuf *opts = NULL;
struct mbuf *n;
struct in6pcb *in6p = NULL;
if (!so)
return;
if (so->so_proto->pr_domain->dom_family != AF_INET6)
return;
in6p = sotoin6pcb(so);
#if defined(IPSEC)
/* check AH/ESP integrity. */
if (ipsec_used && so != NULL && ipsec6_in_reject_so(m, so)) {
IPSEC6_STATINC(IPSEC_STAT_IN_POLVIO);
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL)
icmp6_error(n, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_ADMIN, 0);
return;
}
#endif /*IPSEC*/
if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) {
if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS
#ifdef SO_OTIMESTAMP
|| in6p->in6p_socket->so_options & SO_OTIMESTAMP
#endif
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)) {
struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *);
ip6_savecontrol(in6p, &opts, ip6, n);
}
m_adj(n, off);
if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) {
m_freem(n);
if (opts)
m_freem(opts);
so->so_rcv.sb_overflowed++;
UDP6_STATINC(UDP6_STAT_FULLSOCK);
} else
sorwakeup(so);
}
}
int
udp6_realinput(int af, struct sockaddr_in6 *src, struct sockaddr_in6 *dst,
struct mbuf *m, int off)
{
u_int16_t sport, dport;
int rcvcnt;
struct in6_addr src6, *dst6;
const struct in_addr *dst4;
struct inpcb_hdr *inph;
struct in6pcb *in6p;
rcvcnt = 0;
off += sizeof(struct udphdr); /* now, offset of payload */
if (af != AF_INET && af != AF_INET6)
goto bad;
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6)
goto bad;
src6 = src->sin6_addr;
if (sa6_recoverscope(src) != 0) {
/* XXX: should be impossible. */
goto bad;
}
sport = src->sin6_port;
dport = dst->sin6_port;
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12];
dst6 = &dst->sin6_addr;
if (IN6_IS_ADDR_MULTICAST(dst6) ||
(af == AF_INET && IN_MULTICAST(dst4->s_addr))) {
/*
* Deliver a multicast or broadcast datagram to *all* sockets
* for which the local and remote addresses and ports match
* those of the incoming datagram. This allows more than
* one process to receive multi/broadcasts on the same port.
* (This really ought to be done for unicast datagrams as
* well, but that would cause problems with existing
* applications that open both address-specific sockets and
* a wildcard socket listening to the same port -- they would
* end up receiving duplicates of every unicast datagram.
* Those applications open the multiple sockets to overcome an
* inadequacy of the UDP socket interface, but for backwards
* compatibility we avoid the problem here rather than
* fixing the interface. Maybe 4.5BSD will remedy this?)
*/
/*
* KAME note: traditionally we dropped udpiphdr from mbuf here.
* we need udpiphdr for IPsec processing so we do that later.
*/
/*
* Locate pcb(s) for datagram.
*/
TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) {
in6p = (struct in6pcb *)inph;
if (in6p->in6p_af != AF_INET6)
continue;
if (in6p->in6p_lport != dport)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
dst6))
continue;
} else {
if (IN6_IS_ADDR_V4MAPPED(dst6) &&
(in6p->in6p_flags & IN6P_IPV6_V6ONLY))
continue;
}
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
&src6) || in6p->in6p_fport != sport)
continue;
} else {
if (IN6_IS_ADDR_V4MAPPED(&src6) &&
(in6p->in6p_flags & IN6P_IPV6_V6ONLY))
continue;
}
udp6_sendup(m, off, (struct sockaddr *)src,
in6p->in6p_socket);
rcvcnt++;
/*
* Don't look for additional matches if this one does
* not have either the SO_REUSEPORT or SO_REUSEADDR
* socket options set. This heuristic avoids searching
* through all pcbs in the common case of a non-shared
* port. It assumes that an application will never
* clear these options after setting them.
*/
if ((in6p->in6p_socket->so_options &
(SO_REUSEPORT|SO_REUSEADDR)) == 0)
break;
}
} else {
/*
* Locate pcb for datagram.
*/
in6p = in6_pcblookup_connect(&udbtable, &src6, sport, dst6,
dport, 0, 0);
if (in6p == 0) {
UDP_STATINC(UDP_STAT_PCBHASHMISS);
in6p = in6_pcblookup_bind(&udbtable, dst6, dport, 0);
if (in6p == 0)
return rcvcnt;
}
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket);
rcvcnt++;
}
bad:
return rcvcnt;
}
int
udp6_input_checksum(struct mbuf *m, const struct udphdr *uh, int off, int len)
{
/*
* XXX it's better to record and check if this mbuf is
* already checked.
*/
if (__predict_false((m->m_flags & M_LOOP) && !udp_do_loopback_cksum)) {
goto good;
}
if (uh->uh_sum == 0) {
UDP6_STATINC(UDP6_STAT_NOSUM);
goto bad;
}
switch (m->m_pkthdr.csum_flags &
((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv6) |
M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) {
case M_CSUM_UDPv6|M_CSUM_TCP_UDP_BAD:
UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_bad);
UDP6_STATINC(UDP6_STAT_BADSUM);
goto bad;
#if 0 /* notyet */
case M_CSUM_UDPv6|M_CSUM_DATA:
#endif
case M_CSUM_UDPv6:
/* Checksum was okay. */
UDP_CSUM_COUNTER_INCR(&udp6_hwcsum_ok);
break;
default:
/*
* Need to compute it ourselves. Maybe skip checksum
* on loopback interfaces.
*/
UDP_CSUM_COUNTER_INCR(&udp6_swcsum);
if (in6_cksum(m, IPPROTO_UDP, off, len) != 0) {
UDP6_STATINC(UDP6_STAT_BADSUM);
goto bad;
}
}
good:
return 0;
bad:
return -1;
}
int
udp6_input(struct mbuf **mp, int *offp, int proto)
{
struct mbuf *m = *mp;
int off = *offp;
struct sockaddr_in6 src, dst;
struct ip6_hdr *ip6;
struct udphdr *uh;
u_int32_t plen, ulen;
ip6 = mtod(m, struct ip6_hdr *);
#if defined(NFAITH) && 0 < NFAITH
if (faithprefix(&ip6->ip6_dst)) {
/* send icmp6 host unreach? */
m_freem(m);
return IPPROTO_DONE;
}
#endif
UDP6_STATINC(UDP6_STAT_IPACKETS);
/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */
plen = m->m_pkthdr.len - off;
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr));
if (uh == NULL) {
IP6_STATINC(IP6_STAT_TOOSHORT);
return IPPROTO_DONE;
}
KASSERT(UDP_HDR_ALIGNED_P(uh));
ulen = ntohs((u_short)uh->uh_ulen);
/*
* RFC2675 section 4: jumbograms will have 0 in the UDP header field,
* iff payload length > 0xffff.
*/
if (ulen == 0 && plen > 0xffff)
ulen = plen;
if (plen != ulen) {
UDP6_STATINC(UDP6_STAT_BADLEN);
goto bad;
}
/* destination port of 0 is illegal, based on RFC768. */
if (uh->uh_dport == 0)
goto bad;
/* Be proactive about malicious use of IPv4 mapped address */
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
/* XXX stat */
goto bad;
}
/*
* Checksum extended UDP header and data. Maybe skip checksum
* on loopback interfaces.
*/
if (udp6_input_checksum(m, uh, off, ulen))
goto bad;
/*
* Construct source and dst sockaddrs.
*/
memset(&src, 0, sizeof(src));
src.sin6_family = AF_INET6;
src.sin6_len = sizeof(struct sockaddr_in6);
src.sin6_addr = ip6->ip6_src;
src.sin6_port = uh->uh_sport;
memset(&dst, 0, sizeof(dst));
dst.sin6_family = AF_INET6;
dst.sin6_len = sizeof(struct sockaddr_in6);
dst.sin6_addr = ip6->ip6_dst;
dst.sin6_port = uh->uh_dport;
if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) {
if (m->m_flags & M_MCAST) {
UDP6_STATINC(UDP6_STAT_NOPORTMCAST);
goto bad;
}
UDP6_STATINC(UDP6_STAT_NOPORT);
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
m = NULL;
}
bad:
if (m)
m_freem(m);
return IPPROTO_DONE;
}
static int
udp6_attach(struct socket *so, int proto)
{
struct in6pcb *in6p;
int s, error;
KASSERT(sotoin6pcb(so) == NULL);
sosetlock(so);
/*
* MAPPED_ADDR implementation spec:
* Always attach for IPv6, and only when necessary for IPv4.
*/
s = splsoftnet();
error = in6_pcballoc(so, &udbtable);
splx(s);
if (error) {
return error;
}
error = soreserve(so, udp6_sendspace, udp6_recvspace);
if (error) {
return error;
}
in6p = sotoin6pcb(so);
in6p->in6p_cksum = -1; /* just to be sure */
KASSERT(solocked(so));
return 0;
}
static void
udp6_detach(struct socket *so)
{
struct in6pcb *in6p = sotoin6pcb(so);
int s;
KASSERT(solocked(so));
KASSERT(in6p != NULL);
s = splsoftnet();
in6_pcbdetach(in6p);
splx(s);
}
static int
udp6_accept(struct socket *so, struct mbuf *nam)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
udp6_bind(struct socket *so, struct mbuf *nam, struct lwp *l)
{
struct in6pcb *in6p = sotoin6pcb(so);
int error = 0;
int s;
KASSERT(solocked(so));
KASSERT(in6p != NULL);
s = splsoftnet();
error = in6_pcbbind(in6p, nam, l);
splx(s);
return error;
}
static int
udp6_listen(struct socket *so, struct lwp *l)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
udp6_connect(struct socket *so, struct mbuf *nam, struct lwp *l)
{
struct in6pcb *in6p = sotoin6pcb(so);
int error = 0;
int s;
KASSERT(solocked(so));
KASSERT(in6p != NULL);
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
return EISCONN;
s = splsoftnet();
error = in6_pcbconnect(in6p, nam, l);
splx(s);
if (error == 0)
soisconnected(so);
return error;
}
static int
udp6_disconnect(struct socket *so)
{
struct in6pcb *in6p = sotoin6pcb(so);
int s;
KASSERT(solocked(so));
KASSERT(in6p != NULL);
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr))
return ENOTCONN;
s = splsoftnet();
in6_pcbdisconnect(in6p);
memset((void *)&in6p->in6p_laddr, 0, sizeof(in6p->in6p_laddr));
splx(s);
so->so_state &= ~SS_ISCONNECTED; /* XXX */
in6_pcbstate(in6p, IN6P_BOUND); /* XXX */
return 0;
}
static int
udp6_shutdown(struct socket *so)
{
int s;
s = splsoftnet();
socantsendmore(so);
splx(s);
return 0;
}
static int
udp6_abort(struct socket *so)
{
int s;
KASSERT(solocked(so));
KASSERT(sotoin6pcb(so) != NULL);
s = splsoftnet();
soisdisconnected(so);
in6_pcbdetach(sotoin6pcb(so));
splx(s);
return 0;
}
static int
udp6_ioctl(struct socket *so, u_long cmd, void *addr6, struct ifnet *ifp)
{
/*
* MAPPED_ADDR implementation info:
* Mapped addr support for PRU_CONTROL is not necessary.
* Because typical user of PRU_CONTROL is such as ifconfig,
* and they don't associate any addr to their socket. Then
* socket family is only hint about the PRU_CONTROL'ed address
* family, especially when getting addrs from kernel.
* So AF_INET socket need to be used to control AF_INET addrs,
* and AF_INET6 socket for AF_INET6 addrs.
*/
return in6_control(so, cmd, addr6, ifp);
}
static int
udp6_stat(struct socket *so, struct stat *ub)
{
KASSERT(solocked(so));
/* stat: don't bother with a blocksize */
return 0;
}
static int
udp6_peeraddr(struct socket *so, struct mbuf *nam)
{
KASSERT(solocked(so));
KASSERT(sotoin6pcb(so) != NULL);
KASSERT(nam != NULL);
in6_setpeeraddr(sotoin6pcb(so), nam);
return 0;
}
static int
udp6_sockaddr(struct socket *so, struct mbuf *nam)
{
KASSERT(solocked(so));
KASSERT(sotoin6pcb(so) != NULL);
KASSERT(nam != NULL);
in6_setsockaddr(sotoin6pcb(so), nam);
return 0;
}
static int
udp6_recvoob(struct socket *so, struct mbuf *m, int flags)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
udp6_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;
}
int
udp6_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *addr6,
struct mbuf *control, struct lwp *l)
{
struct in6pcb *in6p = sotoin6pcb(so);
int s, error = 0;
KASSERT(req != PRU_ATTACH);
KASSERT(req != PRU_DETACH);
KASSERT(req != PRU_ACCEPT);
KASSERT(req != PRU_BIND);
KASSERT(req != PRU_LISTEN);
KASSERT(req != PRU_CONNECT);
KASSERT(req != PRU_DISCONNECT);
KASSERT(req != PRU_SHUTDOWN);
KASSERT(req != PRU_ABORT);
KASSERT(req != PRU_CONTROL);
KASSERT(req != PRU_SENSE);
KASSERT(req != PRU_PEERADDR);
KASSERT(req != PRU_SOCKADDR);
KASSERT(req != PRU_RCVOOB);
KASSERT(req != PRU_SENDOOB);
if (req == PRU_PURGEIF) {
mutex_enter(softnet_lock);
in6_pcbpurgeif0(&udbtable, (struct ifnet *)control);
in6_purgeif((struct ifnet *)control);
in6_pcbpurgeif(&udbtable, (struct ifnet *)control);
mutex_exit(softnet_lock);
return 0;
}
if (in6p == NULL) {
error = EINVAL;
goto release;
}
switch (req) {
case PRU_SEND:
s = splsoftnet();
error = udp6_output(in6p, m, addr6, control, l);
splx(s);
return error;
case PRU_CONNECT2:
case PRU_FASTTIMO:
case PRU_SLOWTIMO:
case PRU_PROTORCV:
case PRU_PROTOSEND:
error = EOPNOTSUPP;
break;
case PRU_RCVD:
return EOPNOTSUPP; /* do not free mbuf's */
default:
panic("udp6_usrreq");
}
release:
if (control != NULL)
m_freem(control);
if (m != NULL)
m_freem(m);
return error;
}
static int
sysctl_net_inet6_udp6_stats(SYSCTLFN_ARGS)
{
return (NETSTAT_SYSCTL(udp6stat_percpu, UDP6_NSTATS));
}
static void
sysctl_net_inet6_udp6_setup(struct sysctllog **clog)
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "inet6", NULL,
NULL, 0, NULL, 0,
CTL_NET, PF_INET6, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "udp6",
SYSCTL_DESCR("UDPv6 related settings"),
NULL, 0, NULL, 0,
CTL_NET, PF_INET6, IPPROTO_UDP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "sendspace",
SYSCTL_DESCR("Default UDP send buffer size"),
NULL, 0, &udp6_sendspace, 0,
CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_SENDSPACE,
CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "recvspace",
SYSCTL_DESCR("Default UDP receive buffer size"),
NULL, 0, &udp6_recvspace, 0,
CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_RECVSPACE,
CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, "do_loopback_cksum",
SYSCTL_DESCR("Perform UDP checksum on loopback"),
NULL, 0, &udp_do_loopback_cksum, 0,
CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_LOOPBACKCKSUM,
CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "pcblist",
SYSCTL_DESCR("UDP protocol control block list"),
sysctl_inpcblist, 0, &udbtable, 0,
CTL_NET, PF_INET6, IPPROTO_UDP, CTL_CREATE,
CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "stats",
SYSCTL_DESCR("UDPv6 statistics"),
sysctl_net_inet6_udp6_stats, 0, NULL, 0,
CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_STATS,
CTL_EOL);
}
void
udp6_statinc(u_int stat)
{
KASSERT(stat < UDP6_NSTATS);
UDP6_STATINC(stat);
}
PR_WRAP_USRREQS(udp6)
#define udp6_attach udp6_attach_wrapper
#define udp6_detach udp6_detach_wrapper
#define udp6_accept udp6_accept_wrapper
#define udp6_bind udp6_bind_wrapper
#define udp6_listen udp6_listen_wrapper
#define udp6_connect udp6_connect_wrapper
#define udp6_disconnect udp6_disconnect_wrapper
#define udp6_shutdown udp6_shutdown_wrapper
#define udp6_abort udp6_abort_wrapper
#define udp6_ioctl udp6_ioctl_wrapper
#define udp6_stat udp6_stat_wrapper
#define udp6_peeraddr udp6_peeraddr_wrapper
#define udp6_sockaddr udp6_sockaddr_wrapper
#define udp6_recvoob udp6_recvoob_wrapper
#define udp6_sendoob udp6_sendoob_wrapper
#define udp6_usrreq udp6_usrreq_wrapper
const struct pr_usrreqs udp6_usrreqs = {
.pr_attach = udp6_attach,
.pr_detach = udp6_detach,
.pr_accept = udp6_accept,
.pr_bind = udp6_bind,
.pr_listen = udp6_listen,
.pr_connect = udp6_connect,
.pr_disconnect = udp6_disconnect,
.pr_shutdown = udp6_shutdown,
.pr_abort = udp6_abort,
.pr_ioctl = udp6_ioctl,
.pr_stat = udp6_stat,
.pr_peeraddr = udp6_peeraddr,
.pr_sockaddr = udp6_sockaddr,
.pr_recvoob = udp6_recvoob,
.pr_sendoob = udp6_sendoob,
.pr_generic = udp6_usrreq,
};
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