/*
|
/*
|
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
|
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
|
* The Regents of the University of California. All rights reserved.
|
* The Regents of the University of California. All rights reserved.
|
*
|
*
|
* Redistribution and use in source and binary forms, with or without
|
* Redistribution and use in source and binary forms, with or without
|
* modification, are permitted provided that the following conditions
|
* modification, are permitted provided that the following conditions
|
* are met:
|
* are met:
|
* 1. Redistributions of source code must retain the above copyright
|
* 1. Redistributions of source code must retain the above copyright
|
* notice, this list of conditions and the following disclaimer.
|
* notice, this list of conditions and the following disclaimer.
|
* 2. Redistributions in binary form must reproduce the above copyright
|
* 2. Redistributions in binary form must reproduce the above copyright
|
* notice, this list of conditions and the following disclaimer in the
|
* notice, this list of conditions and the following disclaimer in the
|
* documentation and/or other materials provided with the distribution.
|
* documentation and/or other materials provided with the distribution.
|
* 3. All advertising materials mentioning features or use of this software
|
* 3. All advertising materials mentioning features or use of this software
|
* must display the following acknowledgement:
|
* must display the following acknowledgement:
|
* This product includes software developed by the University of
|
* This product includes software developed by the University of
|
* California, Berkeley and its contributors.
|
* California, Berkeley and its contributors.
|
* 4. Neither the name of the University nor the names of its contributors
|
* 4. Neither the name of the University nor the names of its contributors
|
* may be used to endorse or promote products derived from this software
|
* may be used to endorse or promote products derived from this software
|
* without specific prior written permission.
|
* without specific prior written permission.
|
*
|
*
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
* 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
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
* SUCH DAMAGE.
|
* SUCH DAMAGE.
|
*
|
*
|
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
|
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
|
* udp_usrreq.c,v 1.2 1998/08/20 21:47:37 joel Exp
|
* udp_usrreq.c,v 1.2 1998/08/20 21:47:37 joel Exp
|
*/
|
*/
|
|
|
#include <sys/param.h>
|
#include <sys/param.h>
|
#include <sys/queue.h>
|
#include <sys/queue.h>
|
#include <sys/systm.h>
|
#include <sys/systm.h>
|
#include <sys/malloc.h>
|
#include <sys/malloc.h>
|
#include <sys/mbuf.h>
|
#include <sys/mbuf.h>
|
#include <sys/protosw.h>
|
#include <sys/protosw.h>
|
#include <sys/socket.h>
|
#include <sys/socket.h>
|
#include <sys/socketvar.h>
|
#include <sys/socketvar.h>
|
#include <sys/errno.h>
|
#include <sys/errno.h>
|
#include <sys/stat.h>
|
#include <sys/stat.h>
|
#include <sys/kernel.h>
|
#include <sys/kernel.h>
|
#include <sys/sysctl.h>
|
#include <sys/sysctl.h>
|
#include <sys/syslog.h>
|
#include <sys/syslog.h>
|
|
|
#include <net/if.h>
|
#include <net/if.h>
|
#include <net/route.h>
|
#include <net/route.h>
|
|
|
#include <netinet/in.h>
|
#include <netinet/in.h>
|
#include <netinet/in_systm.h>
|
#include <netinet/in_systm.h>
|
#include <netinet/ip.h>
|
#include <netinet/ip.h>
|
#include <netinet/in_pcb.h>
|
#include <netinet/in_pcb.h>
|
#include <netinet/in_var.h>
|
#include <netinet/in_var.h>
|
#include <netinet/ip_var.h>
|
#include <netinet/ip_var.h>
|
#include <netinet/ip_icmp.h>
|
#include <netinet/ip_icmp.h>
|
#include <netinet/udp.h>
|
#include <netinet/udp.h>
|
#include <netinet/udp_var.h>
|
#include <netinet/udp_var.h>
|
|
|
/*
|
/*
|
* UDP protocol implementation.
|
* UDP protocol implementation.
|
* Per RFC 768, August, 1980.
|
* Per RFC 768, August, 1980.
|
*/
|
*/
|
#ifndef COMPAT_42
|
#ifndef COMPAT_42
|
static int udpcksum = 1;
|
static int udpcksum = 1;
|
#else
|
#else
|
static int udpcksum = 0; /* XXX */
|
static int udpcksum = 0; /* XXX */
|
#endif
|
#endif
|
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
|
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
|
&udpcksum, 0, "");
|
&udpcksum, 0, "");
|
|
|
static int log_in_vain = 0;
|
static int log_in_vain = 0;
|
SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
|
SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
|
&log_in_vain, 0, "");
|
&log_in_vain, 0, "");
|
|
|
static struct inpcbhead udb; /* from udp_var.h */
|
static struct inpcbhead udb; /* from udp_var.h */
|
static struct inpcbinfo udbinfo;
|
static struct inpcbinfo udbinfo;
|
|
|
#ifndef UDBHASHSIZE
|
#ifndef UDBHASHSIZE
|
#define UDBHASHSIZE 64
|
#define UDBHASHSIZE 64
|
#endif
|
#endif
|
|
|
struct udpstat udpstat; /* from udp_var.h */
|
struct udpstat udpstat; /* from udp_var.h */
|
SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD,
|
SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD,
|
&udpstat, udpstat, "");
|
&udpstat, udpstat, "");
|
|
|
static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
|
static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
|
|
|
static void udp_detach __P((struct inpcb *));
|
static void udp_detach __P((struct inpcb *));
|
static int udp_output __P((struct inpcb *, struct mbuf *, struct mbuf *,
|
static int udp_output __P((struct inpcb *, struct mbuf *, struct mbuf *,
|
struct mbuf *));
|
struct mbuf *));
|
static void udp_notify __P((struct inpcb *, int));
|
static void udp_notify __P((struct inpcb *, int));
|
|
|
void
|
void
|
udp_init()
|
udp_init()
|
{
|
{
|
LIST_INIT(&udb);
|
LIST_INIT(&udb);
|
udbinfo.listhead = &udb;
|
udbinfo.listhead = &udb;
|
udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
|
udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
|
}
|
}
|
|
|
void
|
void
|
udp_input(m, iphlen)
|
udp_input(m, iphlen)
|
register struct mbuf *m;
|
register struct mbuf *m;
|
int iphlen;
|
int iphlen;
|
{
|
{
|
register struct ip *ip;
|
register struct ip *ip;
|
register struct udphdr *uh;
|
register struct udphdr *uh;
|
register struct inpcb *inp;
|
register struct inpcb *inp;
|
struct mbuf *opts = 0;
|
struct mbuf *opts = 0;
|
int len;
|
int len;
|
struct ip save_ip;
|
struct ip save_ip;
|
|
|
udpstat.udps_ipackets++;
|
udpstat.udps_ipackets++;
|
|
|
/*
|
/*
|
* Strip IP options, if any; should skip this,
|
* Strip IP options, if any; should skip this,
|
* make available to user, and use on returned packets,
|
* make available to user, and use on returned packets,
|
* but we don't yet have a way to check the checksum
|
* but we don't yet have a way to check the checksum
|
* with options still present.
|
* with options still present.
|
*/
|
*/
|
if (iphlen > sizeof (struct ip)) {
|
if (iphlen > sizeof (struct ip)) {
|
ip_stripoptions(m, (struct mbuf *)0);
|
ip_stripoptions(m, (struct mbuf *)0);
|
iphlen = sizeof(struct ip);
|
iphlen = sizeof(struct ip);
|
}
|
}
|
|
|
/*
|
/*
|
* Get IP and UDP header together in first mbuf.
|
* Get IP and UDP header together in first mbuf.
|
*/
|
*/
|
ip = mtod(m, struct ip *);
|
ip = mtod(m, struct ip *);
|
if (m->m_len < iphlen + sizeof(struct udphdr)) {
|
if (m->m_len < iphlen + sizeof(struct udphdr)) {
|
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
|
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
|
udpstat.udps_hdrops++;
|
udpstat.udps_hdrops++;
|
return;
|
return;
|
}
|
}
|
ip = mtod(m, struct ip *);
|
ip = mtod(m, struct ip *);
|
}
|
}
|
uh = (struct udphdr *)((caddr_t)ip + iphlen);
|
uh = (struct udphdr *)((caddr_t)ip + iphlen);
|
|
|
/*
|
/*
|
* Make mbuf data length reflect UDP length.
|
* Make mbuf data length reflect UDP length.
|
* If not enough data to reflect UDP length, drop.
|
* If not enough data to reflect UDP length, drop.
|
*/
|
*/
|
len = ntohs((u_short)uh->uh_ulen);
|
len = ntohs((u_short)uh->uh_ulen);
|
if (ip->ip_len != len) {
|
if (ip->ip_len != len) {
|
if (len > ip->ip_len || len < sizeof(struct udphdr)) {
|
if (len > ip->ip_len || len < sizeof(struct udphdr)) {
|
udpstat.udps_badlen++;
|
udpstat.udps_badlen++;
|
goto bad;
|
goto bad;
|
}
|
}
|
m_adj(m, len - ip->ip_len);
|
m_adj(m, len - ip->ip_len);
|
/* ip->ip_len = len; */
|
/* ip->ip_len = len; */
|
}
|
}
|
/*
|
/*
|
* Save a copy of the IP header in case we want restore it
|
* Save a copy of the IP header in case we want restore it
|
* for sending an ICMP error message in response.
|
* for sending an ICMP error message in response.
|
*/
|
*/
|
save_ip = *ip;
|
save_ip = *ip;
|
|
|
/*
|
/*
|
* Checksum extended UDP header and data.
|
* Checksum extended UDP header and data.
|
*/
|
*/
|
if (uh->uh_sum) {
|
if (uh->uh_sum) {
|
((struct ipovly *)ip)->ih_next = 0;
|
((struct ipovly *)ip)->ih_next = 0;
|
((struct ipovly *)ip)->ih_prev = 0;
|
((struct ipovly *)ip)->ih_prev = 0;
|
((struct ipovly *)ip)->ih_x1 = 0;
|
((struct ipovly *)ip)->ih_x1 = 0;
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen;
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen;
|
uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
|
uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
|
if (uh->uh_sum) {
|
if (uh->uh_sum) {
|
udpstat.udps_badsum++;
|
udpstat.udps_badsum++;
|
m_freem(m);
|
m_freem(m);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
|
|
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
|
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
|
in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
|
in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
|
struct inpcb *last;
|
struct inpcb *last;
|
/*
|
/*
|
* Deliver a multicast or broadcast datagram to *all* sockets
|
* Deliver a multicast or broadcast datagram to *all* sockets
|
* for which the local and remote addresses and ports match
|
* for which the local and remote addresses and ports match
|
* those of the incoming datagram. This allows more than
|
* those of the incoming datagram. This allows more than
|
* one process to receive multi/broadcasts on the same port.
|
* one process to receive multi/broadcasts on the same port.
|
* (This really ought to be done for unicast datagrams as
|
* (This really ought to be done for unicast datagrams as
|
* well, but that would cause problems with existing
|
* well, but that would cause problems with existing
|
* applications that open both address-specific sockets and
|
* applications that open both address-specific sockets and
|
* a wildcard socket listening to the same port -- they would
|
* a wildcard socket listening to the same port -- they would
|
* end up receiving duplicates of every unicast datagram.
|
* end up receiving duplicates of every unicast datagram.
|
* Those applications open the multiple sockets to overcome an
|
* Those applications open the multiple sockets to overcome an
|
* inadequacy of the UDP socket interface, but for backwards
|
* inadequacy of the UDP socket interface, but for backwards
|
* compatibility we avoid the problem here rather than
|
* compatibility we avoid the problem here rather than
|
* fixing the interface. Maybe 4.5BSD will remedy this?)
|
* fixing the interface. Maybe 4.5BSD will remedy this?)
|
*/
|
*/
|
|
|
/*
|
/*
|
* Construct sockaddr format source address.
|
* Construct sockaddr format source address.
|
*/
|
*/
|
udp_in.sin_port = uh->uh_sport;
|
udp_in.sin_port = uh->uh_sport;
|
udp_in.sin_addr = ip->ip_src;
|
udp_in.sin_addr = ip->ip_src;
|
m->m_len -= sizeof (struct udpiphdr);
|
m->m_len -= sizeof (struct udpiphdr);
|
m->m_data += sizeof (struct udpiphdr);
|
m->m_data += sizeof (struct udpiphdr);
|
/*
|
/*
|
* Locate pcb(s) for datagram.
|
* Locate pcb(s) for datagram.
|
* (Algorithm copied from raw_intr().)
|
* (Algorithm copied from raw_intr().)
|
*/
|
*/
|
last = NULL;
|
last = NULL;
|
for (inp = udb.lh_first; inp != NULL; inp = inp->inp_list.le_next) {
|
for (inp = udb.lh_first; inp != NULL; inp = inp->inp_list.le_next) {
|
if (inp->inp_lport != uh->uh_dport)
|
if (inp->inp_lport != uh->uh_dport)
|
continue;
|
continue;
|
if (inp->inp_laddr.s_addr != INADDR_ANY) {
|
if (inp->inp_laddr.s_addr != INADDR_ANY) {
|
if (inp->inp_laddr.s_addr !=
|
if (inp->inp_laddr.s_addr !=
|
ip->ip_dst.s_addr)
|
ip->ip_dst.s_addr)
|
continue;
|
continue;
|
}
|
}
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
if (inp->inp_faddr.s_addr !=
|
if (inp->inp_faddr.s_addr !=
|
ip->ip_src.s_addr ||
|
ip->ip_src.s_addr ||
|
inp->inp_fport != uh->uh_sport)
|
inp->inp_fport != uh->uh_sport)
|
continue;
|
continue;
|
}
|
}
|
|
|
if (last != NULL) {
|
if (last != NULL) {
|
struct mbuf *n;
|
struct mbuf *n;
|
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
|
if (last->inp_flags & INP_CONTROLOPTS
|
if (last->inp_flags & INP_CONTROLOPTS
|
|| last->inp_socket->so_options & SO_TIMESTAMP)
|
|| last->inp_socket->so_options & SO_TIMESTAMP)
|
ip_savecontrol(last, &opts, ip, n);
|
ip_savecontrol(last, &opts, ip, n);
|
if (sbappendaddr(&last->inp_socket->so_rcv,
|
if (sbappendaddr(&last->inp_socket->so_rcv,
|
(struct sockaddr *)&udp_in,
|
(struct sockaddr *)&udp_in,
|
n, opts) == 0) {
|
n, opts) == 0) {
|
m_freem(n);
|
m_freem(n);
|
if (opts)
|
if (opts)
|
m_freem(opts);
|
m_freem(opts);
|
udpstat.udps_fullsock++;
|
udpstat.udps_fullsock++;
|
} else
|
} else
|
sorwakeup(last->inp_socket);
|
sorwakeup(last->inp_socket);
|
opts = 0;
|
opts = 0;
|
}
|
}
|
}
|
}
|
last = inp;
|
last = inp;
|
/*
|
/*
|
* Don't look for additional matches if this one does
|
* Don't look for additional matches if this one does
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
* socket options set. This heuristic avoids searching
|
* socket options set. This heuristic avoids searching
|
* through all pcbs in the common case of a non-shared
|
* through all pcbs in the common case of a non-shared
|
* port. It * assumes that an application will never
|
* port. It * assumes that an application will never
|
* clear these options after setting them.
|
* clear these options after setting them.
|
*/
|
*/
|
if (((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0))
|
if (((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0))
|
break;
|
break;
|
}
|
}
|
|
|
if (last == NULL) {
|
if (last == NULL) {
|
/*
|
/*
|
* No matching pcb found; discard datagram.
|
* No matching pcb found; discard datagram.
|
* (No need to send an ICMP Port Unreachable
|
* (No need to send an ICMP Port Unreachable
|
* for a broadcast or multicast datgram.)
|
* for a broadcast or multicast datgram.)
|
*/
|
*/
|
udpstat.udps_noportbcast++;
|
udpstat.udps_noportbcast++;
|
goto bad;
|
goto bad;
|
}
|
}
|
if (last->inp_flags & INP_CONTROLOPTS
|
if (last->inp_flags & INP_CONTROLOPTS
|
|| last->inp_socket->so_options & SO_TIMESTAMP)
|
|| last->inp_socket->so_options & SO_TIMESTAMP)
|
ip_savecontrol(last, &opts, ip, m);
|
ip_savecontrol(last, &opts, ip, m);
|
if (sbappendaddr(&last->inp_socket->so_rcv,
|
if (sbappendaddr(&last->inp_socket->so_rcv,
|
(struct sockaddr *)&udp_in,
|
(struct sockaddr *)&udp_in,
|
m, opts) == 0) {
|
m, opts) == 0) {
|
udpstat.udps_fullsock++;
|
udpstat.udps_fullsock++;
|
goto bad;
|
goto bad;
|
}
|
}
|
sorwakeup(last->inp_socket);
|
sorwakeup(last->inp_socket);
|
return;
|
return;
|
}
|
}
|
/*
|
/*
|
* Locate pcb for datagram.
|
* Locate pcb for datagram.
|
*/
|
*/
|
inp = in_pcblookuphash(&udbinfo, ip->ip_src, uh->uh_sport,
|
inp = in_pcblookuphash(&udbinfo, ip->ip_src, uh->uh_sport,
|
ip->ip_dst, uh->uh_dport, 1);
|
ip->ip_dst, uh->uh_dport, 1);
|
if (inp == NULL) {
|
if (inp == NULL) {
|
if (log_in_vain) {
|
if (log_in_vain) {
|
char buf[4*sizeof "123"];
|
char buf[4*sizeof "123"];
|
|
|
strcpy(buf, inet_ntoa(ip->ip_dst));
|
strcpy(buf, inet_ntoa(ip->ip_dst));
|
log(LOG_INFO, "Connection attempt to UDP %s:%d"
|
log(LOG_INFO, "Connection attempt to UDP %s:%d"
|
" from %s:%d\n",
|
" from %s:%d\n",
|
buf, ntohs(uh->uh_dport),
|
buf, ntohs(uh->uh_dport),
|
inet_ntoa(ip->ip_src), ntohs(uh->uh_sport));
|
inet_ntoa(ip->ip_src), ntohs(uh->uh_sport));
|
}
|
}
|
udpstat.udps_noport++;
|
udpstat.udps_noport++;
|
if (m->m_flags & (M_BCAST | M_MCAST)) {
|
if (m->m_flags & (M_BCAST | M_MCAST)) {
|
udpstat.udps_noportbcast++;
|
udpstat.udps_noportbcast++;
|
goto bad;
|
goto bad;
|
}
|
}
|
*ip = save_ip;
|
*ip = save_ip;
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* Construct sockaddr format source address.
|
* Construct sockaddr format source address.
|
* Stuff source address and datagram in user buffer.
|
* Stuff source address and datagram in user buffer.
|
*/
|
*/
|
udp_in.sin_port = uh->uh_sport;
|
udp_in.sin_port = uh->uh_sport;
|
udp_in.sin_addr = ip->ip_src;
|
udp_in.sin_addr = ip->ip_src;
|
if (inp->inp_flags & INP_CONTROLOPTS
|
if (inp->inp_flags & INP_CONTROLOPTS
|
|| inp->inp_socket->so_options & SO_TIMESTAMP)
|
|| inp->inp_socket->so_options & SO_TIMESTAMP)
|
ip_savecontrol(inp, &opts, ip, m);
|
ip_savecontrol(inp, &opts, ip, m);
|
iphlen += sizeof(struct udphdr);
|
iphlen += sizeof(struct udphdr);
|
m->m_len -= iphlen;
|
m->m_len -= iphlen;
|
m->m_pkthdr.len -= iphlen;
|
m->m_pkthdr.len -= iphlen;
|
m->m_data += iphlen;
|
m->m_data += iphlen;
|
if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in,
|
if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in,
|
m, opts) == 0) {
|
m, opts) == 0) {
|
udpstat.udps_fullsock++;
|
udpstat.udps_fullsock++;
|
goto bad;
|
goto bad;
|
}
|
}
|
sorwakeup(inp->inp_socket);
|
sorwakeup(inp->inp_socket);
|
return;
|
return;
|
bad:
|
bad:
|
m_freem(m);
|
m_freem(m);
|
if (opts)
|
if (opts)
|
m_freem(opts);
|
m_freem(opts);
|
}
|
}
|
|
|
/*
|
/*
|
* Notify a udp user of an asynchronous error;
|
* Notify a udp user of an asynchronous error;
|
* just wake up so that he can collect error status.
|
* just wake up so that he can collect error status.
|
*/
|
*/
|
static void
|
static void
|
udp_notify(inp, errnum)
|
udp_notify(inp, errnum)
|
register struct inpcb *inp;
|
register struct inpcb *inp;
|
int errnum;
|
int errnum;
|
{
|
{
|
inp->inp_socket->so_error = errnum;
|
inp->inp_socket->so_error = errnum;
|
sorwakeup(inp->inp_socket);
|
sorwakeup(inp->inp_socket);
|
sowwakeup(inp->inp_socket);
|
sowwakeup(inp->inp_socket);
|
}
|
}
|
|
|
void
|
void
|
udp_ctlinput(cmd, sa, vip)
|
udp_ctlinput(cmd, sa, vip)
|
int cmd;
|
int cmd;
|
struct sockaddr *sa;
|
struct sockaddr *sa;
|
void *vip;
|
void *vip;
|
{
|
{
|
register struct ip *ip = vip;
|
register struct ip *ip = vip;
|
register struct udphdr *uh;
|
register struct udphdr *uh;
|
|
|
if (!PRC_IS_REDIRECT(cmd) &&
|
if (!PRC_IS_REDIRECT(cmd) &&
|
((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0))
|
((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0))
|
return;
|
return;
|
if (ip) {
|
if (ip) {
|
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
|
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
|
in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport,
|
in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport,
|
cmd, udp_notify);
|
cmd, udp_notify);
|
} else
|
} else
|
in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify);
|
in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify);
|
}
|
}
|
|
|
static int
|
static int
|
udp_output(inp, m, addr, control)
|
udp_output(inp, m, addr, control)
|
register struct inpcb *inp;
|
register struct inpcb *inp;
|
register struct mbuf *m;
|
register struct mbuf *m;
|
struct mbuf *addr, *control;
|
struct mbuf *addr, *control;
|
{
|
{
|
register struct udpiphdr *ui;
|
register struct udpiphdr *ui;
|
register int len = m->m_pkthdr.len;
|
register int len = m->m_pkthdr.len;
|
struct in_addr laddr;
|
struct in_addr laddr;
|
int s = 0, error = 0;
|
int s = 0, error = 0;
|
|
|
if (control)
|
if (control)
|
m_freem(control); /* XXX */
|
m_freem(control); /* XXX */
|
|
|
if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
|
if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
|
error = EMSGSIZE;
|
error = EMSGSIZE;
|
goto release;
|
goto release;
|
}
|
}
|
|
|
if (addr) {
|
if (addr) {
|
laddr = inp->inp_laddr;
|
laddr = inp->inp_laddr;
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
error = EISCONN;
|
error = EISCONN;
|
goto release;
|
goto release;
|
}
|
}
|
/*
|
/*
|
* Must block input while temporarily connected.
|
* Must block input while temporarily connected.
|
*/
|
*/
|
s = splnet();
|
s = splnet();
|
error = in_pcbconnect(inp, addr);
|
error = in_pcbconnect(inp, addr);
|
if (error) {
|
if (error) {
|
splx(s);
|
splx(s);
|
goto release;
|
goto release;
|
}
|
}
|
} else {
|
} else {
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
error = ENOTCONN;
|
error = ENOTCONN;
|
goto release;
|
goto release;
|
}
|
}
|
}
|
}
|
/*
|
/*
|
* Calculate data length and get a mbuf
|
* Calculate data length and get a mbuf
|
* for UDP and IP headers.
|
* for UDP and IP headers.
|
*/
|
*/
|
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
|
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
|
if (m == 0) {
|
if (m == 0) {
|
error = ENOBUFS;
|
error = ENOBUFS;
|
if (addr)
|
if (addr)
|
splx(s);
|
splx(s);
|
goto release;
|
goto release;
|
}
|
}
|
|
|
/*
|
/*
|
* Fill in mbuf with extended UDP header
|
* Fill in mbuf with extended UDP header
|
* and addresses and length put into network format.
|
* and addresses and length put into network format.
|
*/
|
*/
|
ui = mtod(m, struct udpiphdr *);
|
ui = mtod(m, struct udpiphdr *);
|
ui->ui_next = ui->ui_prev = 0;
|
ui->ui_next = ui->ui_prev = 0;
|
ui->ui_x1 = 0;
|
ui->ui_x1 = 0;
|
ui->ui_pr = IPPROTO_UDP;
|
ui->ui_pr = IPPROTO_UDP;
|
ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
|
ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
|
ui->ui_src = inp->inp_laddr;
|
ui->ui_src = inp->inp_laddr;
|
ui->ui_dst = inp->inp_faddr;
|
ui->ui_dst = inp->inp_faddr;
|
ui->ui_sport = inp->inp_lport;
|
ui->ui_sport = inp->inp_lport;
|
ui->ui_dport = inp->inp_fport;
|
ui->ui_dport = inp->inp_fport;
|
ui->ui_ulen = ui->ui_len;
|
ui->ui_ulen = ui->ui_len;
|
|
|
/*
|
/*
|
* Stuff checksum and output datagram.
|
* Stuff checksum and output datagram.
|
*/
|
*/
|
ui->ui_sum = 0;
|
ui->ui_sum = 0;
|
if (udpcksum) {
|
if (udpcksum) {
|
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
|
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
|
ui->ui_sum = 0xffff;
|
ui->ui_sum = 0xffff;
|
}
|
}
|
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
|
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
|
((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
|
((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
|
((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
|
((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
|
udpstat.udps_opackets++;
|
udpstat.udps_opackets++;
|
error = ip_output(m, inp->inp_options, &inp->inp_route,
|
error = ip_output(m, inp->inp_options, &inp->inp_route,
|
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
|
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
|
inp->inp_moptions);
|
inp->inp_moptions);
|
|
|
if (addr) {
|
if (addr) {
|
in_pcbdisconnect(inp);
|
in_pcbdisconnect(inp);
|
inp->inp_laddr = laddr;
|
inp->inp_laddr = laddr;
|
splx(s);
|
splx(s);
|
}
|
}
|
return (error);
|
return (error);
|
|
|
release:
|
release:
|
m_freem(m);
|
m_freem(m);
|
return (error);
|
return (error);
|
}
|
}
|
|
|
static u_long udp_sendspace = 9216; /* really max datagram size */
|
static u_long udp_sendspace = 9216; /* really max datagram size */
|
/* 40 1K datagrams */
|
/* 40 1K datagrams */
|
SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
|
SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
|
&udp_sendspace, 0, "");
|
&udp_sendspace, 0, "");
|
|
|
static u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
|
static u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
|
SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
|
SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
|
&udp_recvspace, 0, "");
|
&udp_recvspace, 0, "");
|
|
|
/*ARGSUSED*/
|
/*ARGSUSED*/
|
int
|
int
|
udp_usrreq(so, req, m, addr, control)
|
udp_usrreq(so, req, m, addr, control)
|
struct socket *so;
|
struct socket *so;
|
int req;
|
int req;
|
struct mbuf *m, *addr, *control;
|
struct mbuf *m, *addr, *control;
|
{
|
{
|
struct inpcb *inp = sotoinpcb(so);
|
struct inpcb *inp = sotoinpcb(so);
|
int error = 0;
|
int error = 0;
|
int s;
|
int s;
|
|
|
if (req == PRU_CONTROL)
|
if (req == PRU_CONTROL)
|
return (in_control(so, (u_long)m, (caddr_t)addr,
|
return (in_control(so, (u_long)m, (caddr_t)addr,
|
(struct ifnet *)control));
|
(struct ifnet *)control));
|
if (inp == NULL && req != PRU_ATTACH) {
|
if (inp == NULL && req != PRU_ATTACH) {
|
error = EINVAL;
|
error = EINVAL;
|
goto release;
|
goto release;
|
}
|
}
|
/*
|
/*
|
* Note: need to block udp_input while changing
|
* Note: need to block udp_input while changing
|
* the udp pcb queue and/or pcb addresses.
|
* the udp pcb queue and/or pcb addresses.
|
*/
|
*/
|
switch (req) {
|
switch (req) {
|
|
|
case PRU_ATTACH:
|
case PRU_ATTACH:
|
if (inp != NULL) {
|
if (inp != NULL) {
|
error = EINVAL;
|
error = EINVAL;
|
break;
|
break;
|
}
|
}
|
s = splnet();
|
s = splnet();
|
error = in_pcballoc(so, &udbinfo);
|
error = in_pcballoc(so, &udbinfo);
|
splx(s);
|
splx(s);
|
if (error)
|
if (error)
|
break;
|
break;
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
if (error)
|
if (error)
|
break;
|
break;
|
((struct inpcb *) so->so_pcb)->inp_ip_ttl = ip_defttl;
|
((struct inpcb *) so->so_pcb)->inp_ip_ttl = ip_defttl;
|
break;
|
break;
|
|
|
case PRU_DETACH:
|
case PRU_DETACH:
|
udp_detach(inp);
|
udp_detach(inp);
|
break;
|
break;
|
|
|
case PRU_BIND:
|
case PRU_BIND:
|
s = splnet();
|
s = splnet();
|
error = in_pcbbind(inp, addr);
|
error = in_pcbbind(inp, addr);
|
splx(s);
|
splx(s);
|
break;
|
break;
|
|
|
case PRU_LISTEN:
|
case PRU_LISTEN:
|
error = EOPNOTSUPP;
|
error = EOPNOTSUPP;
|
break;
|
break;
|
|
|
case PRU_CONNECT:
|
case PRU_CONNECT:
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
error = EISCONN;
|
error = EISCONN;
|
break;
|
break;
|
}
|
}
|
s = splnet();
|
s = splnet();
|
error = in_pcbconnect(inp, addr);
|
error = in_pcbconnect(inp, addr);
|
splx(s);
|
splx(s);
|
if (error == 0)
|
if (error == 0)
|
soisconnected(so);
|
soisconnected(so);
|
break;
|
break;
|
|
|
case PRU_CONNECT2:
|
case PRU_CONNECT2:
|
error = EOPNOTSUPP;
|
error = EOPNOTSUPP;
|
break;
|
break;
|
|
|
case PRU_ACCEPT:
|
case PRU_ACCEPT:
|
error = EOPNOTSUPP;
|
error = EOPNOTSUPP;
|
break;
|
break;
|
|
|
case PRU_DISCONNECT:
|
case PRU_DISCONNECT:
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
error = ENOTCONN;
|
error = ENOTCONN;
|
break;
|
break;
|
}
|
}
|
s = splnet();
|
s = splnet();
|
in_pcbdisconnect(inp);
|
in_pcbdisconnect(inp);
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
splx(s);
|
splx(s);
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
break;
|
break;
|
|
|
case PRU_SHUTDOWN:
|
case PRU_SHUTDOWN:
|
socantsendmore(so);
|
socantsendmore(so);
|
break;
|
break;
|
|
|
case PRU_SEND:
|
case PRU_SEND:
|
return (udp_output(inp, m, addr, control));
|
return (udp_output(inp, m, addr, control));
|
|
|
case PRU_ABORT:
|
case PRU_ABORT:
|
soisdisconnected(so);
|
soisdisconnected(so);
|
udp_detach(inp);
|
udp_detach(inp);
|
break;
|
break;
|
|
|
case PRU_SOCKADDR:
|
case PRU_SOCKADDR:
|
in_setsockaddr(inp, addr);
|
in_setsockaddr(inp, addr);
|
break;
|
break;
|
|
|
case PRU_PEERADDR:
|
case PRU_PEERADDR:
|
in_setpeeraddr(inp, addr);
|
in_setpeeraddr(inp, addr);
|
break;
|
break;
|
|
|
case PRU_SENSE:
|
case PRU_SENSE:
|
/*
|
/*
|
* stat: don't bother with a blocksize.
|
* stat: don't bother with a blocksize.
|
*/
|
*/
|
return (0);
|
return (0);
|
|
|
case PRU_SENDOOB:
|
case PRU_SENDOOB:
|
case PRU_FASTTIMO:
|
case PRU_FASTTIMO:
|
case PRU_SLOWTIMO:
|
case PRU_SLOWTIMO:
|
case PRU_PROTORCV:
|
case PRU_PROTORCV:
|
case PRU_PROTOSEND:
|
case PRU_PROTOSEND:
|
error = EOPNOTSUPP;
|
error = EOPNOTSUPP;
|
break;
|
break;
|
|
|
case PRU_RCVD:
|
case PRU_RCVD:
|
case PRU_RCVOOB:
|
case PRU_RCVOOB:
|
return (EOPNOTSUPP); /* do not free mbuf's */
|
return (EOPNOTSUPP); /* do not free mbuf's */
|
|
|
default:
|
default:
|
panic("udp_usrreq");
|
panic("udp_usrreq");
|
}
|
}
|
|
|
release:
|
release:
|
if (control) {
|
if (control) {
|
printf("udp control data unexpectedly retained\n");
|
printf("udp control data unexpectedly retained\n");
|
m_freem(control);
|
m_freem(control);
|
}
|
}
|
if (m)
|
if (m)
|
m_freem(m);
|
m_freem(m);
|
return (error);
|
return (error);
|
}
|
}
|
|
|
static void
|
static void
|
udp_detach(inp)
|
udp_detach(inp)
|
struct inpcb *inp;
|
struct inpcb *inp;
|
{
|
{
|
int s = splnet();
|
int s = splnet();
|
|
|
in_pcbdetach(inp);
|
in_pcbdetach(inp);
|
splx(s);
|
splx(s);
|
}
|
}
|
|
|
