472 lines
13 KiB
C
472 lines
13 KiB
C
/* $NetBSD: udp6_usrreq.c,v 1.75 2006/07/23 22:06:13 ad 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 1.75 2006/07/23 22:06:13 ad Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/syslog.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/ip.h>
|
|
#include <netinet/ip_var.h>
|
|
#include <netinet/in_pcb.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/udp_var.h>
|
|
#include <netinet/ip6.h>
|
|
#include <netinet6/ip6_var.h>
|
|
#include <netinet6/in6_pcb.h>
|
|
#include <netinet/icmp6.h>
|
|
#include <netinet6/udp6_var.h>
|
|
#include <netinet6/ip6protosw.h>
|
|
#include <netinet/in_offload.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;
|
|
struct udp6stat udp6stat;
|
|
|
|
static void udp6_notify __P((struct in6pcb *, int));
|
|
|
|
void
|
|
udp6_init()
|
|
{
|
|
/* initialization done in udp_input() due to initialization order */
|
|
}
|
|
|
|
/*
|
|
* Notify a udp user of an asynchronous error;
|
|
* just wake up so that he can collect error status.
|
|
*/
|
|
static void
|
|
udp6_notify(in6p, errno)
|
|
struct in6pcb *in6p;
|
|
int errno;
|
|
{
|
|
in6p->in6p_socket->so_error = errno;
|
|
sorwakeup(in6p->in6p_socket);
|
|
sowwakeup(in6p->in6p_socket);
|
|
}
|
|
|
|
void
|
|
udp6_ctlinput(cmd, sa, d)
|
|
int cmd;
|
|
struct sockaddr *sa;
|
|
void *d;
|
|
{
|
|
struct udphdr uh;
|
|
struct ip6_hdr *ip6;
|
|
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
|
|
struct mbuf *m;
|
|
int off;
|
|
void *cmdarg;
|
|
struct ip6ctlparam *ip6cp = NULL;
|
|
const struct sockaddr_in6 *sa6_src = NULL;
|
|
void (*notify) __P((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;
|
|
|
|
if ((unsigned)cmd >= PRC_NCMDS)
|
|
return;
|
|
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;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
bzero(&uh, sizeof(uh));
|
|
m_copydata(m, off, sizeof(*uhp), (caddr_t)&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))
|
|
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);
|
|
}
|
|
}
|
|
|
|
extern int udp6_sendspace;
|
|
extern int udp6_recvspace;
|
|
|
|
int
|
|
udp6_usrreq(so, req, m, addr6, control, l)
|
|
struct socket *so;
|
|
int req;
|
|
struct mbuf *m, *addr6, *control;
|
|
struct lwp *l;
|
|
{
|
|
struct in6pcb *in6p = sotoin6pcb(so);
|
|
int error = 0;
|
|
int s;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (req == PRU_CONTROL)
|
|
return (in6_control(so, (u_long)m, (caddr_t)addr6,
|
|
(struct ifnet *)control, l));
|
|
|
|
if (req == PRU_PURGEIF) {
|
|
in6_pcbpurgeif0(&udbtable, (struct ifnet *)control);
|
|
in6_purgeif((struct ifnet *)control);
|
|
in6_pcbpurgeif(&udbtable, (struct ifnet *)control);
|
|
return (0);
|
|
}
|
|
|
|
if (in6p == NULL && req != PRU_ATTACH) {
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
|
|
switch (req) {
|
|
case PRU_ATTACH:
|
|
/*
|
|
* MAPPED_ADDR implementation spec:
|
|
* Always attach for IPv6,
|
|
* and only when necessary for IPv4.
|
|
*/
|
|
if (in6p != NULL) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
s = splsoftnet();
|
|
error = in6_pcballoc(so, &udbtable);
|
|
splx(s);
|
|
if (error)
|
|
break;
|
|
error = soreserve(so, udp6_sendspace, udp6_recvspace);
|
|
if (error)
|
|
break;
|
|
in6p = sotoin6pcb(so);
|
|
in6p->in6p_cksum = -1; /* just to be sure */
|
|
break;
|
|
|
|
case PRU_DETACH:
|
|
in6_pcbdetach(in6p);
|
|
break;
|
|
|
|
case PRU_BIND:
|
|
s = splsoftnet();
|
|
error = in6_pcbbind(in6p, addr6, l);
|
|
splx(s);
|
|
break;
|
|
|
|
case PRU_LISTEN:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_CONNECT:
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
|
error = EISCONN;
|
|
break;
|
|
}
|
|
s = splsoftnet();
|
|
error = in6_pcbconnect(in6p, addr6, l);
|
|
splx(s);
|
|
if (error == 0)
|
|
soisconnected(so);
|
|
break;
|
|
|
|
case PRU_CONNECT2:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_ACCEPT:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_DISCONNECT:
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
|
error = ENOTCONN;
|
|
break;
|
|
}
|
|
s = splsoftnet();
|
|
in6_pcbdisconnect(in6p);
|
|
bzero((caddr_t)&in6p->in6p_laddr, sizeof(in6p->in6p_laddr));
|
|
splx(s);
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
|
in6_pcbstate(in6p, IN6P_BOUND); /* XXX */
|
|
break;
|
|
|
|
case PRU_SHUTDOWN:
|
|
socantsendmore(so);
|
|
break;
|
|
|
|
case PRU_SEND:
|
|
return (udp6_output(in6p, m, addr6, control, l));
|
|
|
|
case PRU_ABORT:
|
|
soisdisconnected(so);
|
|
in6_pcbdetach(in6p);
|
|
break;
|
|
|
|
case PRU_SOCKADDR:
|
|
in6_setsockaddr(in6p, addr6);
|
|
break;
|
|
|
|
case PRU_PEERADDR:
|
|
in6_setpeeraddr(in6p, addr6);
|
|
break;
|
|
|
|
case PRU_SENSE:
|
|
/*
|
|
* stat: don't bother with a blocksize
|
|
*/
|
|
return (0);
|
|
|
|
case PRU_SENDOOB:
|
|
case PRU_FASTTIMO:
|
|
case PRU_SLOWTIMO:
|
|
case PRU_PROTORCV:
|
|
case PRU_PROTOSEND:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
|
|
case PRU_RCVD:
|
|
case PRU_RCVOOB:
|
|
return (EOPNOTSUPP); /* do not free mbuf's */
|
|
|
|
default:
|
|
panic("udp6_usrreq");
|
|
}
|
|
|
|
release:
|
|
if (control)
|
|
m_freem(control);
|
|
if (m)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_SETUP(sysctl_net_inet6_udp6_setup, "sysctl net.inet6.udp6 subtree setup")
|
|
{
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, "net", NULL,
|
|
NULL, 0, NULL, 0,
|
|
CTL_NET, CTL_EOL);
|
|
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"),
|
|
NULL, 0, &udp6stat, sizeof(udp6stat),
|
|
CTL_NET, PF_INET6, IPPROTO_UDP, UDP6CTL_STATS,
|
|
CTL_EOL);
|
|
}
|