/*
* Copyright (c) 1982, 1986, 1991, 1993, 1995
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and 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
* 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.
*
* @(#)in_pcb.c 8.4 (Berkeley) 5/24/95
* $Id$
*/
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.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>
struct in_addr zeroin_addr;
static void in_pcbinshash __P((struct inpcb *));
static void in_rtchange __P((struct inpcb *, int));
/*
* These configure the range of local port addresses assigned to
* "unspecified" outgoing connections/packets/whatever.
*/
static int ipport_lowfirstauto = IPPORT_RESERVED - 1; /* 1023 */
static int ipport_lowlastauto = IPPORT_RESERVEDSTART; /* 600 */
static int ipport_firstauto = IPPORT_RESERVED; /* 1024 */
static int ipport_lastauto = IPPORT_USERRESERVED; /* 5000 */
static int ipport_hifirstauto = IPPORT_HIFIRSTAUTO; /* 40000 */
static int ipport_hilastauto = IPPORT_HILASTAUTO; /* 44999 */
#define RANGECHK(var, min, max) \
if ((var) < (min)) { (var) = (min); } \
else if ((var) > (max)) { (var) = (max); }
#if 0
static int
sysctl_net_ipport_check SYSCTL_HANDLER_ARGS
{
int error = sysctl_handle_int(oidp,
oidp->oid_arg1, oidp->oid_arg2, req);
if (!error) {
RANGECHK(ipport_lowfirstauto, 1, IPPORT_RESERVED - 1);
RANGECHK(ipport_lowlastauto, 1, IPPORT_RESERVED - 1);
RANGECHK(ipport_firstauto, IPPORT_RESERVED, USHRT_MAX);
RANGECHK(ipport_lastauto, IPPORT_RESERVED, USHRT_MAX);
RANGECHK(ipport_hifirstauto, IPPORT_RESERVED, USHRT_MAX);
RANGECHK(ipport_hilastauto, IPPORT_RESERVED, USHRT_MAX);
}
return error;
}
#endif
#undef RANGECHK
SYSCTL_NODE(_net_inet_ip, IPPROTO_IP, portrange, CTLFLAG_RW, 0, "IP Ports");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowfirst, CTLTYPE_INT|CTLFLAG_RW,
&ipport_lowfirstauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, lowlast, CTLTYPE_INT|CTLFLAG_RW,
&ipport_lowlastauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, first, CTLTYPE_INT|CTLFLAG_RW,
&ipport_firstauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, last, CTLTYPE_INT|CTLFLAG_RW,
&ipport_lastauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hifirst, CTLTYPE_INT|CTLFLAG_RW,
&ipport_hifirstauto, 0, &sysctl_net_ipport_check, "I", "");
SYSCTL_PROC(_net_inet_ip_portrange, OID_AUTO, hilast, CTLTYPE_INT|CTLFLAG_RW,
&ipport_hilastauto, 0, &sysctl_net_ipport_check, "I", "");
int
in_pcballoc(so, pcbinfo)
struct socket *so;
struct inpcbinfo *pcbinfo;
{
register struct inpcb *inp;
int s;
MALLOC(inp, struct inpcb *, sizeof(*inp), M_PCB, M_NOWAIT);
if (inp == NULL)
return (ENOBUFS);
bzero((caddr_t)inp, sizeof(*inp));
inp->inp_pcbinfo = pcbinfo;
inp->inp_socket = so;
s = splnet();
LIST_INSERT_HEAD(pcbinfo->listhead, inp, inp_list);
in_pcbinshash(inp);
splx(s);
so->so_pcb = (caddr_t)inp;
return (0);
}
int
in_pcbbind(inp, nam)
register struct inpcb *inp;
struct mbuf *nam;
{
register struct socket *so = inp->inp_socket;
unsigned short *lastport;
struct sockaddr_in *sin;
u_short lport = 0;
int wild = 0, reuseport = (so->so_options & SO_REUSEPORT);
int error;
if (in_ifaddr == 0)
return (EADDRNOTAVAIL);
if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
return (EINVAL);
if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 &&
((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
(so->so_options & SO_ACCEPTCONN) == 0))
wild = 1;
if (nam) {
sin = mtod(nam, struct sockaddr_in *);
if (nam->m_len != sizeof (*sin))
return (EINVAL);
#ifdef notdef
/*
* We should check the family, but old programs
* incorrectly fail to initialize it.
*/
if (sin->sin_family != AF_INET)
return (EAFNOSUPPORT);
#endif
lport = sin->sin_port;
if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
/*
* Treat SO_REUSEADDR as SO_REUSEPORT for multicast;
* allow complete duplication of binding if
* SO_REUSEPORT is set, or if SO_REUSEADDR is set
* and a multicast address is bound on both
* new and duplicated sockets.
*/
if (so->so_options & SO_REUSEADDR)
reuseport = SO_REUSEADDR|SO_REUSEPORT;
} else if (sin->sin_addr.s_addr != INADDR_ANY) {
sin->sin_port = 0; /* yech... */
if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
return (EADDRNOTAVAIL);
}
if (lport) {
struct inpcb *t;
/* GROSS */
if (ntohs(lport) < IPPORT_RESERVED &&
(error = suser(p->p_ucred, &p->p_acflag)))
return (EACCES);
if (so->so_uid) {
t = in_pcblookup(inp->inp_pcbinfo, zeroin_addr,
0, sin->sin_addr, lport,
INPLOOKUP_WILDCARD);
if (t && (so->so_uid != t->inp_socket->so_uid))
return (EADDRINUSE);
}
t = in_pcblookup(inp->inp_pcbinfo, zeroin_addr, 0,
sin->sin_addr, lport, wild);
if (t && (reuseport & t->inp_socket->so_options) == 0)
return (EADDRINUSE);
}
inp->inp_laddr = sin->sin_addr;
}
if (lport == 0) {
ushort first, last;
int count;
inp->inp_flags |= INP_ANONPORT;
if (inp->inp_flags & INP_HIGHPORT) {
first = ipport_hifirstauto; /* sysctl */
last = ipport_hilastauto;
lastport = &inp->inp_pcbinfo->lasthi;
} else if (inp->inp_flags & INP_LOWPORT) {
if ((error = suser(p->p_ucred, &p->p_acflag)))
return (EACCES);
first = ipport_lowfirstauto; /* 1023 */
last = ipport_lowlastauto; /* 600 */
lastport = &inp->inp_pcbinfo->lastlow;
} else {
first = ipport_firstauto; /* sysctl */
last = ipport_lastauto;
lastport = &inp->inp_pcbinfo->lastport;
}
/*
* Simple check to ensure all ports are not used up causing
* a deadlock here.
*
* We split the two cases (up and down) so that the direction
* is not being tested on each round of the loop.
*/
if (first > last) {
/*
* counting down
*/
count = first - last;
do {
if (count-- <= 0) /* completely used? */
return (EADDRNOTAVAIL);
--*lastport;
if (*lastport > first || *lastport < last)
*lastport = first;
lport = htons(*lastport);
} while (in_pcblookup(inp->inp_pcbinfo,
zeroin_addr, 0, inp->inp_laddr, lport, wild));
} else {
/*
* counting up
*/
count = last - first;
do {
if (count-- <= 0) /* completely used? */
return (EADDRNOTAVAIL);
++*lastport;
if (*lastport < first || *lastport > last)
*lastport = first;
lport = htons(*lastport);
} while (in_pcblookup(inp->inp_pcbinfo,
zeroin_addr, 0, inp->inp_laddr, lport, wild));
}
}
inp->inp_lport = lport;
in_pcbrehash(inp);
return (0);
}
/*
* Transform old in_pcbconnect() into an inner subroutine for new
* in_pcbconnect(): Do some validity-checking on the remote
* address (in mbuf 'nam') and then determine local host address
* (i.e., which interface) to use to access that remote host.
*
* This preserves definition of in_pcbconnect(), while supporting a
* slightly different version for T/TCP. (This is more than
* a bit of a kludge, but cleaning up the internal interfaces would
* have forced minor changes in every protocol).
*/
int
in_pcbladdr(inp, nam, plocal_sin)
register struct inpcb *inp;
struct mbuf *nam;
struct sockaddr_in **plocal_sin;
{
struct in_ifaddr *ia;
register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
if (nam->m_len != sizeof (*sin))
return (EINVAL);
if (sin->sin_family != AF_INET)
return (EAFNOSUPPORT);
if (sin->sin_port == 0)
return (EADDRNOTAVAIL);
if (in_ifaddr) {
/*
* If the destination address is INADDR_ANY,
* use the primary local address.
* If the supplied address is INADDR_BROADCAST,
* and the primary interface supports broadcast,
* choose the broadcast address for that interface.
*/
#define satosin(sa) ((struct sockaddr_in *)(sa))
#define sintosa(sin) ((struct sockaddr *)(sin))
#define ifatoia(ifa) ((struct in_ifaddr *)(ifa))
if (sin->sin_addr.s_addr == INADDR_ANY)
sin->sin_addr = IA_SIN(in_ifaddr)->sin_addr;
else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
(in_ifaddr->ia_ifp->if_flags & IFF_BROADCAST))
sin->sin_addr = satosin(&in_ifaddr->ia_broadaddr)->sin_addr;
}
if (inp->inp_laddr.s_addr == INADDR_ANY) {
register struct route *ro;
ia = (struct in_ifaddr *)0;
/*
* If route is known or can be allocated now,
* our src addr is taken from the i/f, else punt.
*/
ro = &inp->inp_route;
if (ro->ro_rt &&
(satosin(&ro->ro_dst)->sin_addr.s_addr !=
sin->sin_addr.s_addr ||
inp->inp_socket->so_options & SO_DONTROUTE)) {
RTFREE(ro->ro_rt);
ro->ro_rt = (struct rtentry *)0;
}
if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/
(ro->ro_rt == (struct rtentry *)0 ||
ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
/* No route yet, so try to acquire one */
ro->ro_dst.sa_family = AF_INET;
ro->ro_dst.sa_len = sizeof(struct sockaddr_in);
((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
sin->sin_addr;
rtalloc(ro);
}
/*
* If we found a route, use the address
* corresponding to the outgoing interface
* unless it is the loopback (in case a route
* to our address on another net goes to loopback).
*/
if (ro->ro_rt && !(ro->ro_rt->rt_ifp->if_flags & IFF_LOOPBACK))
ia = ifatoia(ro->ro_rt->rt_ifa);
if (ia == 0) {
u_short fport = sin->sin_port;
sin->sin_port = 0;
ia = ifatoia(ifa_ifwithdstaddr(sintosa(sin)));
if (ia == 0)
ia = ifatoia(ifa_ifwithnet(sintosa(sin)));
sin->sin_port = fport;
if (ia == 0)
ia = in_ifaddr;
if (ia == 0)
return (EADDRNOTAVAIL);
}
/*
* If the destination address is multicast and an outgoing
* interface has been set as a multicast option, use the
* address of that interface as our source address.
*/
if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) &&
inp->inp_moptions != NULL) {
struct ip_moptions *imo;
struct ifnet *ifp;
imo = inp->inp_moptions;
if (imo->imo_multicast_ifp != NULL) {
ifp = imo->imo_multicast_ifp;
for (ia = in_ifaddr; ia; ia = ia->ia_next)
if (ia->ia_ifp == ifp)
break;
if (ia == 0)
return (EADDRNOTAVAIL);
}
}
/*
* Don't do pcblookup call here; return interface in plocal_sin
* and exit to caller, that will do the lookup.
*/
*plocal_sin = &ia->ia_addr;
}
return(0);
}
/*
* Outer subroutine:
* Connect from a socket to a specified address.
* Both address and port must be specified in argument sin.
* If don't have a local address for this socket yet,
* then pick one.
*/
int
in_pcbconnect(inp, nam)
register struct inpcb *inp;
struct mbuf *nam;
{
struct sockaddr_in *ifaddr;
register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
int error;
/*
* Call inner routine, to assign local interface address.
*/
if ((error = in_pcbladdr(inp, nam, &ifaddr)))
return(error);
if (in_pcblookuphash(inp->inp_pcbinfo, sin->sin_addr, sin->sin_port,
inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
inp->inp_lport, 0) != NULL)
return (EADDRINUSE);
if (inp->inp_laddr.s_addr == INADDR_ANY) {
if (inp->inp_lport == 0)
(void)in_pcbbind(inp, (struct mbuf *)0);
inp->inp_laddr = ifaddr->sin_addr;
}
inp->inp_faddr = sin->sin_addr;
inp->inp_fport = sin->sin_port;
in_pcbrehash(inp);
return (0);
}
void
in_pcbdisconnect(inp)
struct inpcb *inp;
{
inp->inp_faddr.s_addr = INADDR_ANY;
inp->inp_fport = 0;
in_pcbrehash(inp);
if (inp->inp_socket->so_state & SS_NOFDREF)
in_pcbdetach(inp);
}
void
in_pcbdetach(inp)
struct inpcb *inp;
{
struct socket *so = inp->inp_socket;
int s;
so->so_pcb = 0;
sofree(so);
if (inp->inp_options)
(void)m_free(inp->inp_options);
if (inp->inp_route.ro_rt)
rtfree(inp->inp_route.ro_rt);
ip_freemoptions(inp->inp_moptions);
s = splnet();
LIST_REMOVE(inp, inp_hash);
LIST_REMOVE(inp, inp_list);
splx(s);
FREE(inp, M_PCB);
}
void
in_setsockaddr(inp, nam)
register struct inpcb *inp;
struct mbuf *nam;
{
register struct sockaddr_in *sin;
nam->m_len = sizeof (*sin);
sin = mtod(nam, struct sockaddr_in *);
bzero((caddr_t)sin, sizeof (*sin));
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = inp->inp_lport;
sin->sin_addr = inp->inp_laddr;
}
void
in_setpeeraddr(inp, nam)
struct inpcb *inp;
struct mbuf *nam;
{
register struct sockaddr_in *sin;
nam->m_len = sizeof (*sin);
sin = mtod(nam, struct sockaddr_in *);
bzero((caddr_t)sin, sizeof (*sin));
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_port = inp->inp_fport;
sin->sin_addr = inp->inp_faddr;
}
/*
* Pass some notification to all connections of a protocol
* associated with address dst. The local address and/or port numbers
* may be specified to limit the search. The "usual action" will be
* taken, depending on the ctlinput cmd. The caller must filter any
* cmds that are uninteresting (e.g., no error in the map).
* Call the protocol specific routine (if any) to report
* any errors for each matching socket.
*
* Must be called at splnet.
*/
void
in_pcbnotify(head, dst, fport_arg, laddr, lport_arg, cmd, notify)
struct inpcbhead *head;
struct sockaddr *dst;
u_int fport_arg, lport_arg;
struct in_addr laddr;
int cmd;
void (*notify) __P((struct inpcb *, int));
{
register struct inpcb *inp, *oinp;
struct in_addr faddr;
u_short fport = fport_arg, lport = lport_arg;
int errnum, s;
if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET)
return;
faddr = ((struct sockaddr_in *)dst)->sin_addr;
if (faddr.s_addr == INADDR_ANY)
return;
/*
* Redirects go to all references to the destination,
* and use in_rtchange to invalidate the route cache.
* Dead host indications: notify all references to the destination.
* Otherwise, if we have knowledge of the local port and address,
* deliver only to that socket.
*/
if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) {
fport = 0;
lport = 0;
laddr.s_addr = 0;
if (cmd != PRC_HOSTDEAD)
notify = in_rtchange;
}
errnum = inetctlerrmap[cmd];
s = splnet();
for (inp = head->lh_first; inp != NULL;) {
if (inp->inp_faddr.s_addr != faddr.s_addr ||
inp->inp_socket == 0 ||
(lport && inp->inp_lport != lport) ||
(laddr.s_addr && inp->inp_laddr.s_addr != laddr.s_addr) ||
(fport && inp->inp_fport != fport)) {
inp = inp->inp_list.le_next;
continue;
}
oinp = inp;
inp = inp->inp_list.le_next;
if (notify)
(*notify)(oinp, errnum);
}
splx(s);
}
/*
* Check for alternatives when higher level complains
* about service problems. For now, invalidate cached
* routing information. If the route was created dynamically
* (by a redirect), time to try a default gateway again.
*/
void
in_losing(inp)
struct inpcb *inp;
{
register struct rtentry *rt;
struct rt_addrinfo info;
if ((rt = inp->inp_route.ro_rt)) {
inp->inp_route.ro_rt = 0;
bzero((caddr_t)&info, sizeof(info));
info.rti_info[RTAX_DST] =
(struct sockaddr *)&inp->inp_route.ro_dst;
info.rti_info[RTAX_GATEWAY] = rt->rt_gateway;
info.rti_info[RTAX_NETMASK] = rt_mask(rt);
rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0);
if (rt->rt_flags & RTF_DYNAMIC)
(void) rtrequest(RTM_DELETE, rt_key(rt),
rt->rt_gateway, rt_mask(rt), rt->rt_flags,
(struct rtentry **)0);
else
/*
* A new route can be allocated
* the next time output is attempted.
*/
rtfree(rt);
}
}
/*
* After a routing change, flush old routing
* and allocate a (hopefully) better one.
*/
static void
in_rtchange(inp, errnum)
register struct inpcb *inp;
int errnum;
{
if (inp->inp_route.ro_rt) {
rtfree(inp->inp_route.ro_rt);
inp->inp_route.ro_rt = 0;
/*
* A new route can be allocated the next time
* output is attempted.
*/
}
}
struct inpcb *
in_pcblookup(pcbinfo, faddr, fport_arg, laddr, lport_arg, wild_okay)
struct inpcbinfo *pcbinfo;
struct in_addr faddr, laddr;
u_int fport_arg, lport_arg;
int wild_okay;
{
register struct inpcb *inp, *match = NULL;
int matchwild = 3, wildcard;
u_short fport = fport_arg, lport = lport_arg;
int s;
s = splnet();
for (inp = pcbinfo->listhead->lh_first; inp != NULL; inp = inp->inp_list.le_next) {
if (inp->inp_lport != lport)
continue;
wildcard = 0;
if (inp->inp_faddr.s_addr != INADDR_ANY) {
if (faddr.s_addr == INADDR_ANY)
wildcard++;
else if (inp->inp_faddr.s_addr != faddr.s_addr ||
inp->inp_fport != fport)
continue;
} else {
if (faddr.s_addr != INADDR_ANY)
wildcard++;
}
if (inp->inp_laddr.s_addr != INADDR_ANY) {
if (laddr.s_addr == INADDR_ANY)
wildcard++;
else if (inp->inp_laddr.s_addr != laddr.s_addr)
continue;
} else {
if (laddr.s_addr != INADDR_ANY)
wildcard++;
}
if (wildcard && wild_okay == 0)
continue;
if (wildcard < matchwild) {
match = inp;
matchwild = wildcard;
if (matchwild == 0) {
break;
}
}
}
splx(s);
return (match);
}
/*
* Lookup PCB in hash list.
*/
struct inpcb *
in_pcblookuphash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard)
struct inpcbinfo *pcbinfo;
struct in_addr faddr, laddr;
u_int fport_arg, lport_arg;
int wildcard;
{
struct inpcbhead *head;
register struct inpcb *inp;
u_short fport = fport_arg, lport = lport_arg;
int s;
s = splnet();
/*
* First look for an exact match.
*/
head = &pcbinfo->hashbase[INP_PCBHASH(faddr.s_addr, lport, fport, pcbinfo->hashmask)];
for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) {
if (inp->inp_faddr.s_addr == faddr.s_addr &&
inp->inp_laddr.s_addr == laddr.s_addr &&
inp->inp_fport == fport &&
inp->inp_lport == lport)
goto found;
}
if (wildcard) {
struct inpcb *local_wild = NULL;
head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, pcbinfo->hashmask)];
for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) {
if (inp->inp_faddr.s_addr == INADDR_ANY &&
inp->inp_fport == 0 && inp->inp_lport == lport) {
if (inp->inp_laddr.s_addr == laddr.s_addr)
goto found;
else if (inp->inp_laddr.s_addr == INADDR_ANY)
local_wild = inp;
}
}
if (local_wild != NULL) {
inp = local_wild;
goto found;
}
}
splx(s);
return (NULL);
found:
/*
* Move PCB to head of this hash chain so that it can be
* found more quickly in the future.
* XXX - this is a pessimization on machines with few
* concurrent connections.
*/
if (inp != head->lh_first) {
LIST_REMOVE(inp, inp_hash);
LIST_INSERT_HEAD(head, inp, inp_hash);
}
splx(s);
return (inp);
}
/*
* Insert PCB into hash chain. Must be called at splnet.
*/
static void
in_pcbinshash(inp)
struct inpcb *inp;
{
struct inpcbhead *head;
head = &inp->inp_pcbinfo->hashbase[INP_PCBHASH(inp->inp_faddr.s_addr,
inp->inp_lport, inp->inp_fport, inp->inp_pcbinfo->hashmask)];
LIST_INSERT_HEAD(head, inp, inp_hash);
}
void
in_pcbrehash(inp)
struct inpcb *inp;
{
struct inpcbhead *head;
int s;
s = splnet();
LIST_REMOVE(inp, inp_hash);
head = &inp->inp_pcbinfo->hashbase[INP_PCBHASH(inp->inp_faddr.s_addr,
inp->inp_lport, inp->inp_fport, inp->inp_pcbinfo->hashmask)];
LIST_INSERT_HEAD(head, inp, inp_hash);
splx(s);
}
