[unix-history] / usr / src / sys / netinet / in_pcb.c

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)in_pcb.c	7.3 (Berkeley) %G%
 */

#include "param.h"
#include "systm.h"
#include "dir.h"
#include "user.h"
#include "mbuf.h"
#include "socket.h"
#include "socketvar.h"
#include "ioctl.h"
#include "in.h"
#include "in_systm.h"
#include "../net/if.h"
#include "../net/route.h"
#include "in_pcb.h"
#include "in_var.h"
#include "protosw.h"

struct	in_addr zeroin_addr;

in_pcballoc(so, head)
	struct socket *so;
	struct inpcb *head;
{
	struct mbuf *m;
	register struct inpcb *inp;

	m = m_getclr(M_DONTWAIT, MT_PCB);
	if (m == NULL)
		return (ENOBUFS);
	inp = mtod(m, struct inpcb *);
	inp->inp_head = head;
	inp->inp_socket = so;
	insque(inp, head);
	so->so_pcb = (caddr_t)inp;
	return (0);
}
	
in_pcbbind(inp, nam)
	register struct inpcb *inp;
	struct mbuf *nam;
{
	register struct socket *so = inp->inp_socket;
	register struct inpcb *head = inp->inp_head;
	register struct sockaddr_in *sin;
	u_short lport = 0;

	if (in_ifaddr == 0)
		return (EADDRNOTAVAIL);
	if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY)
		return (EINVAL);
	if (nam == 0)
		goto noname;
	sin = mtod(nam, struct sockaddr_in *);
	if (nam->m_len != sizeof (*sin))
		return (EINVAL);
	if (sin->sin_addr.s_addr != INADDR_ANY) {
		int tport = sin->sin_port;

		sin->sin_port = 0;		/* yech... */
		if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
			return (EADDRNOTAVAIL);
		sin->sin_port = tport;
	}
	lport = sin->sin_port;
	if (lport) {
		u_short aport = ntohs(lport);
		int wild = 0;

		/* GROSS */
		if (aport < IPPORT_RESERVED && u.u_uid != 0)
			return (EACCES);
		/* even GROSSER, but this is the Internet */
		if ((so->so_options & SO_REUSEADDR) == 0 &&
		    ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 ||
		     (so->so_options & SO_ACCEPTCONN) == 0))
			wild = INPLOOKUP_WILDCARD;
		if (in_pcblookup(head,
		    zeroin_addr, 0, sin->sin_addr, lport, wild))
			return (EADDRINUSE);
	}
	inp->inp_laddr = sin->sin_addr;
noname:
	if (lport == 0)
		do {
			if (head->inp_lport++ < IPPORT_RESERVED ||
			    head->inp_lport > IPPORT_USERRESERVED)
				head->inp_lport = IPPORT_RESERVED;
			lport = htons(head->inp_lport);
		} while (in_pcblookup(head,
			    zeroin_addr, 0, inp->inp_laddr, lport, 0));
	inp->inp_lport = lport;
	return (0);
}

/*
 * 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.
 */
in_pcbconnect(inp, nam)
	struct inpcb *inp;
	struct mbuf *nam;
{
	struct in_ifaddr *ia;
	struct sockaddr_in *ifaddr;
	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))
		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;
		struct ifnet *ifp;

		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;
			((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 && (ifp = ro->ro_rt->rt_ifp) &&
		    (ifp->if_flags & IFF_LOOPBACK) == 0)
			for (ia = in_ifaddr; ia; ia = ia->ia_next)
				if (ia->ia_ifp == ifp)
					break;
		if (ia == 0) {
			int fport = sin->sin_port;

			sin->sin_port = 0;
			ia = (struct in_ifaddr *)
			    ifa_ifwithdstaddr((struct sockaddr *)sin);
			sin->sin_port = fport;
			if (ia == 0)
				ia = in_iaonnetof(in_netof(sin->sin_addr));
			if (ia == 0)
				ia = in_ifaddr;
			if (ia == 0)
				return (EADDRNOTAVAIL);
		}
		ifaddr = (struct sockaddr_in *)&ia->ia_addr;
	}
	if (in_pcblookup(inp->inp_head,
	    sin->sin_addr,
	    sin->sin_port,
	    inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
	    inp->inp_lport,
	    0))
		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;
	return (0);
}

in_pcbdisconnect(inp)
	struct inpcb *inp;
{

	inp->inp_faddr.s_addr = INADDR_ANY;
	inp->inp_fport = 0;
	if (inp->inp_socket->so_state & SS_NOFDREF)
		in_pcbdetach(inp);
}

in_pcbdetach(inp)
	struct inpcb *inp;
{
	struct socket *so = inp->inp_socket;

	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);
	remque(inp);
	(void) m_free(dtom(inp));
}

in_setsockaddr(inp, nam)
	register struct inpcb *inp;
	struct mbuf *nam;
{
	register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
	
	nam->m_len = sizeof (*sin);
	sin = mtod(nam, struct sockaddr_in *);
	bzero((caddr_t)sin, sizeof (*sin));
	sin->sin_family = AF_INET;
	sin->sin_port = inp->inp_lport;
	sin->sin_addr = inp->inp_laddr;
}

in_setpeeraddr(inp, nam)
	register struct inpcb *inp;
	struct mbuf *nam;
{
	register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *);
	
	nam->m_len = sizeof (*sin);
	sin = mtod(nam, struct sockaddr_in *);
	bzero((caddr_t)sin, sizeof (*sin));
	sin->sin_family = AF_INET;
	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.  Call the protocol specific
 * routine (if any) to handle each connection.
 */
in_pcbnotify(head, dst, errno, notify)
	struct inpcb *head;
	register struct in_addr *dst;
	int errno, (*notify)();
{
	register struct inpcb *inp, *oinp;
	int s = splimp();

	for (inp = head->inp_next; inp != head;) {
		if (inp->inp_faddr.s_addr != dst->s_addr ||
		    inp->inp_socket == 0) {
			inp = inp->inp_next;
			continue;
		}
		if (errno) 
			inp->inp_socket->so_error = errno;
		oinp = inp;
		inp = inp->inp_next;
		if (notify)
			(*notify)(oinp);
	}
	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.
 */
in_losing(inp)
	struct inpcb *inp;
{
	register struct rtentry *rt;

	if ((rt = inp->inp_route.ro_rt)) {
		if (rt->rt_flags & RTF_DYNAMIC)
			(void) rtrequest((int)SIOCDELRT, rt);
		rtfree(rt);
		inp->inp_route.ro_rt = 0;
		/*
		 * A new route can be allocated
		 * the next time output is attempted.
		 */
	}
}

/*
 * After a routing change, flush old routing
 * and allocate a (hopefully) better one.
 */
in_rtchange(inp)
	register struct inpcb *inp;
{
	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(head, faddr, fport, laddr, lport, flags)
	struct inpcb *head;
	struct in_addr faddr, laddr;
	u_short fport, lport;
	int flags;
{
	register struct inpcb *inp, *match = 0;
	int matchwild = 3, wildcard;

	for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
		if (inp->inp_lport != lport)
			continue;
		wildcard = 0;
		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 (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 (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
			continue;
		if (wildcard < matchwild) {
			match = inp;
			matchwild = wildcard;
			if (matchwild == 0)
				break;
		}
	}
	return (match);
}
Commit	Line	Data
8ae0e4b4	1	/*
0880b18e	2	* Copyright (c) 1982, 1986 Regents of the University of California.
8ae0e4b4 KM	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
1bf75d4e	6	* @(#)in_pcb.c 7.3 (Berkeley) %G%
8ae0e4b4	7	*/
af092e86	8
20666ad3 JB	9	#include "param.h"
	10	#include "systm.h"
	11	#include "dir.h"
	12	#include "user.h"
	13	#include "mbuf.h"
	14	#include "socket.h"
	15	#include "socketvar.h"
2ba2de86	16	#include "ioctl.h"
20666ad3 JB	17	#include "in.h"
20666ad3 JB	18	#include "in_systm.h"
4ad99bae	19	#include "../net/if.h"
c124e997	20	#include "../net/route.h"
20666ad3	21	#include "in_pcb.h"
5d305bdd	22	#include "in_var.h"
20666ad3	23	#include "protosw.h"
af092e86	24
1a3dbf93	25	struct in_addr zeroin_addr;
405c9168	26
8f0d18de BJ	27	in_pcballoc(so, head)
	28	struct socket *so;
	29	struct inpcb *head;
	30	{
	31	struct mbuf *m;
	32	register struct inpcb *inp;
	33
cce93e4b	34	m = m_getclr(M_DONTWAIT, MT_PCB);
5cdc4d65	35	if (m == NULL)
8f0d18de BJ	36	return (ENOBUFS);
	37	inp = mtod(m, struct inpcb *);
	38	inp->inp_head = head;
	39	inp->inp_socket = so;
	40	insque(inp, head);
	41	so->so_pcb = (caddr_t)inp;
	42	return (0);
	43	}
	44
8075bb0e	45	in_pcbbind(inp, nam)
8f0d18de	46	register struct inpcb *inp;
8075bb0e	47	struct mbuf *nam;
8f0d18de BJ	48	{
	49	register struct socket *so = inp->inp_socket;
	50	register struct inpcb *head = inp->inp_head;
8075bb0e	51	register struct sockaddr_in *sin;
8f0d18de BJ	52	u_short lport = 0;
8f0d18de BJ	53
5d305bdd	54	if (in_ifaddr == 0)
8f0d18de	55	return (EADDRNOTAVAIL);
5cdc4d65	56	if (inp->inp_lport \|\| inp->inp_laddr.s_addr != INADDR_ANY)
8075bb0e BJ	57	return (EINVAL);
	58	if (nam == 0)
	59	goto noname;
	60	sin = mtod(nam, struct sockaddr_in *);
	61	if (nam->m_len != sizeof (*sin))
	62	return (EINVAL);
5cdc4d65	63	if (sin->sin_addr.s_addr != INADDR_ANY) {
8075bb0e	64	int tport = sin->sin_port;
8f0d18de	65
8075bb0e	66	sin->sin_port = 0; /* yech... */
5d305bdd	67	if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
8075bb0e BJ	68	return (EADDRNOTAVAIL);
8075bb0e BJ	69	sin->sin_port = tport;
8f0d18de	70	}
8075bb0e BJ	71	lport = sin->sin_port;
8075bb0e BJ	72	if (lport) {
f2d10020	73	u_short aport = ntohs(lport);
8075bb0e	74	int wild = 0;
c124e997	75
8075bb0e BJ	76	/* GROSS */
	77	if (aport < IPPORT_RESERVED && u.u_uid != 0)
	78	return (EACCES);
b4a3d4a7 SL	79	/* even GROSSER, but this is the Internet */
	80	if ((so->so_options & SO_REUSEADDR) == 0 &&
	81	((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 \|\|
	82	(so->so_options & SO_ACCEPTCONN) == 0))
8075bb0e BJ	83	wild = INPLOOKUP_WILDCARD;
	84	if (in_pcblookup(head,
	85	zeroin_addr, 0, sin->sin_addr, lport, wild))
	86	return (EADDRINUSE);
4ad99bae	87	}
8075bb0e BJ	88	inp->inp_laddr = sin->sin_addr;
8075bb0e BJ	89	noname:
b454c3ea BJ	90	if (lport == 0)
b454c3ea BJ	91	do {
f44e5691 MK	92	if (head->inp_lport++ < IPPORT_RESERVED \|\|
f44e5691 MK	93	head->inp_lport > IPPORT_USERRESERVED)
1aa87517	94	head->inp_lport = IPPORT_RESERVED;
b454c3ea	95	lport = htons(head->inp_lport);
1aa87517 BJ	96	} while (in_pcblookup(head,
1aa87517 BJ	97	zeroin_addr, 0, inp->inp_laddr, lport, 0));
4ad99bae	98	inp->inp_lport = lport;
4ad99bae	99	return (0);
af092e86 BJ	100	}
af092e86 BJ	101
1acff8ec BJ	102	/*
	103	* Connect from a socket to a specified address.
	104	* Both address and port must be specified in argument sin.
	105	* If don't have a local address for this socket yet,
	106	* then pick one.
	107	*/
8075bb0e	108	in_pcbconnect(inp, nam)
4ad99bae	109	struct inpcb *inp;
8075bb0e	110	struct mbuf *nam;
2b4b57cd	111	{
5d305bdd	112	struct in_ifaddr *ia;
ee787340	113	struct sockaddr_in *ifaddr;
8075bb0e	114	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
2b4b57cd	115
8075bb0e BJ	116	if (nam->m_len != sizeof (*sin))
8075bb0e BJ	117	return (EINVAL);
4ad99bae BJ	118	if (sin->sin_family != AF_INET)
4ad99bae BJ	119	return (EAFNOSUPPORT);
5d305bdd	120	if (sin->sin_port == 0)
4ad99bae	121	return (EADDRNOTAVAIL);
5d305bdd	122	if (in_ifaddr) {
3f319daa MK	123	/*
	124	* If the destination address is INADDR_ANY,
	125	* use the primary local address.
	126	* If the supplied address is INADDR_BROADCAST,
	127	* and the primary interface supports broadcast,
	128	* choose the broadcast address for that interface.
	129	*/
5d305bdd MK	130	#define satosin(sa) ((struct sockaddr_in *)(sa))
5d305bdd MK	131	if (sin->sin_addr.s_addr == INADDR_ANY)
3f319daa	132	sin->sin_addr = IA_SIN(in_ifaddr)->sin_addr;
c9aca561	133	else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
3f319daa MK	134	(in_ifaddr->ia_ifp->if_flags & IFF_BROADCAST))
3f319daa MK	135	sin->sin_addr = satosin(&in_ifaddr->ia_broadaddr)->sin_addr;
5d305bdd	136	}
5cdc4d65	137	if (inp->inp_laddr.s_addr == INADDR_ANY) {
c198b4ed MK	138	register struct route *ro;
c198b4ed MK	139	struct ifnet *ifp;
99578149	140
c198b4ed MK	141	ia = (struct in_ifaddr *)0;
	142	/*
	143	* If route is known or can be allocated now,
	144	* our src addr is taken from the i/f, else punt.
	145	*/
	146	ro = &inp->inp_route;
	147	if (ro->ro_rt &&
1bf75d4e MK	148	(satosin(&ro->ro_dst)->sin_addr.s_addr !=
	149	sin->sin_addr.s_addr \|\|
	150	inp->inp_socket->so_options & SO_DONTROUTE)) {
c198b4ed MK	151	RTFREE(ro->ro_rt);
	152	ro->ro_rt = (struct rtentry *)0;
	153	}
9f21d23f MK	154	if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /XXX/
9f21d23f MK	155	(ro->ro_rt == (struct rtentry *)0 \|\|
d4538fe2	156	ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
c198b4ed MK	157	/* No route yet, so try to acquire one */
	158	ro->ro_dst.sa_family = AF_INET;
	159	((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
	160	sin->sin_addr;
	161	rtalloc(ro);
ee787340	162	}
d4538fe2 MK	163	/*
	164	* If we found a route, use the address
	165	* corresponding to the outgoing interface
	166	* unless it is the loopback (in case a route
	167	* to our address on another net goes to loopback).
	168	*/
	169	if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp) &&
	170	(ifp->if_flags & IFF_LOOPBACK) == 0)
	171	for (ia = in_ifaddr; ia; ia = ia->ia_next)
	172	if (ia->ia_ifp == ifp)
	173	break;
9f21d23f	174	if (ia == 0) {
1bf75d4e MK	175	int fport = sin->sin_port;
	176
	177	sin->sin_port = 0;
9f21d23f MK	178	ia = (struct in_ifaddr *)
9f21d23f MK	179	ifa_ifwithdstaddr((struct sockaddr *)sin);
1bf75d4e	180	sin->sin_port = fport;
9f21d23f MK	181	if (ia == 0)
	182	ia = in_iaonnetof(in_netof(sin->sin_addr));
	183	if (ia == 0)
	184	ia = in_ifaddr;
	185	if (ia == 0)
	186	return (EADDRNOTAVAIL);
c198b4ed	187	}
5d305bdd	188	ifaddr = (struct sockaddr_in *)&ia->ia_addr;
1aa87517 BJ	189	}
1aa87517 BJ	190	if (in_pcblookup(inp->inp_head,
1acff8ec BJ	191	sin->sin_addr,
1acff8ec BJ	192	sin->sin_port,
ee787340	193	inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
1acff8ec BJ	194	inp->inp_lport,
1acff8ec BJ	195	0))
b454c3ea	196	return (EADDRINUSE);
3cd2053b SL	197	if (inp->inp_laddr.s_addr == INADDR_ANY) {
3cd2053b SL	198	if (inp->inp_lport == 0)
8011f5df	199	(void)in_pcbbind(inp, (struct mbuf *)0);
ee787340	200	inp->inp_laddr = ifaddr->sin_addr;
3cd2053b	201	}
4ad99bae BJ	202	inp->inp_faddr = sin->sin_addr;
4ad99bae BJ	203	inp->inp_fport = sin->sin_port;
2b4b57cd BJ	204	return (0);
	205	}
	206
405c9168 BJ	207	in_pcbdisconnect(inp)
	208	struct inpcb *inp;
	209	{
	210
5cdc4d65	211	inp->inp_faddr.s_addr = INADDR_ANY;
ebcadd38	212	inp->inp_fport = 0;
8f0d18de	213	if (inp->inp_socket->so_state & SS_NOFDREF)
405c9168 BJ	214	in_pcbdetach(inp);
	215	}
	216
	217	in_pcbdetach(inp)
af092e86 BJ	218	struct inpcb *inp;
	219	{
	220	struct socket *so = inp->inp_socket;
	221
ba55c9af BJ	222	so->so_pcb = 0;
ba55c9af BJ	223	sofree(so);
c9aca561	224	if (inp->inp_options)
8011f5df	225	(void)m_free(inp->inp_options);
c124e997	226	if (inp->inp_route.ro_rt)
f6311fb6	227	rtfree(inp->inp_route.ro_rt);
7545cf09	228	remque(inp);
cdad2eb1	229	(void) m_free(dtom(inp));
af092e86 BJ	230	}
af092e86 BJ	231
8075bb0e	232	in_setsockaddr(inp, nam)
126472ab	233	register struct inpcb *inp;
8075bb0e	234	struct mbuf *nam;
126472ab	235	{
8075bb0e BJ	236	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
	237
	238	nam->m_len = sizeof (*sin);
	239	sin = mtod(nam, struct sockaddr_in *);
126472ab SL	240	bzero((caddr_t)sin, sizeof (*sin));
	241	sin->sin_family = AF_INET;
	242	sin->sin_port = inp->inp_lport;
	243	sin->sin_addr = inp->inp_laddr;
	244	}
	245
a7343092 SL	246	in_setpeeraddr(inp, nam)
	247	register struct inpcb *inp;
	248	struct mbuf *nam;
	249	{
	250	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
	251
	252	nam->m_len = sizeof (*sin);
	253	sin = mtod(nam, struct sockaddr_in *);
	254	bzero((caddr_t)sin, sizeof (*sin));
	255	sin->sin_family = AF_INET;
	256	sin->sin_port = inp->inp_fport;
	257	sin->sin_addr = inp->inp_faddr;
	258	}
	259
72e4f44e	260	/*
842b6bb5	261	* Pass some notification to all connections of a protocol
c9aca561 MK	262	* associated with address dst. Call the protocol specific
c9aca561 MK	263	* routine (if any) to handle each connection.
72e4f44e	264	*/
842b6bb5	265	in_pcbnotify(head, dst, errno, notify)
72e4f44e SL	266	struct inpcb *head;
72e4f44e SL	267	register struct in_addr *dst;
842b6bb5	268	int errno, (*notify)();
72e4f44e SL	269	{
	270	register struct inpcb inp, oinp;
	271	int s = splimp();
	272
72e4f44e	273	for (inp = head->inp_next; inp != head;) {
c9aca561 MK	274	if (inp->inp_faddr.s_addr != dst->s_addr \|\|
c9aca561 MK	275	inp->inp_socket == 0) {
72e4f44e SL	276	inp = inp->inp_next;
	277	continue;
	278	}
842b6bb5 MK	279	if (errno)
842b6bb5 MK	280	inp->inp_socket->so_error = errno;
72e4f44e SL	281	oinp = inp;
72e4f44e SL	282	inp = inp->inp_next;
c9aca561 MK	283	if (notify)
c9aca561 MK	284	(*notify)(oinp);
72e4f44e SL	285	}
	286	splx(s);
	287	}
	288
2ba2de86 MK	289	/*
	290	* Check for alternatives when higher level complains
	291	* about service problems. For now, invalidate cached
	292	* routing information. If the route was created dynamically
	293	* (by a redirect), time to try a default gateway again.
	294	*/
	295	in_losing(inp)
	296	struct inpcb *inp;
	297	{
	298	register struct rtentry *rt;
	299
	300	if ((rt = inp->inp_route.ro_rt)) {
	301	if (rt->rt_flags & RTF_DYNAMIC)
03510dd5	302	(void) rtrequest((int)SIOCDELRT, rt);
2ba2de86 MK	303	rtfree(rt);
	304	inp->inp_route.ro_rt = 0;
	305	/*
	306	* A new route can be allocated
	307	* the next time output is attempted.
	308	*/
	309	}
	310	}
	311
842b6bb5 MK	312	/*
	313	* After a routing change, flush old routing
	314	* and allocate a (hopefully) better one.
	315	*/
	316	in_rtchange(inp)
2ba2de86	317	register struct inpcb *inp;
842b6bb5 MK	318	{
	319	if (inp->inp_route.ro_rt) {
	320	rtfree(inp->inp_route.ro_rt);
	321	inp->inp_route.ro_rt = 0;
	322	/*
	323	* A new route can be allocated the next time
	324	* output is attempted.
	325	*/
	326	}
842b6bb5 MK	327	}
842b6bb5 MK	328
cdad2eb1	329	struct inpcb *
ebcadd38	330	in_pcblookup(head, faddr, fport, laddr, lport, flags)
af092e86	331	struct inpcb *head;
4ad99bae	332	struct in_addr faddr, laddr;
af092e86	333	u_short fport, lport;
ebcadd38	334	int flags;
af092e86	335	{
1aa87517 BJ	336	register struct inpcb inp, match = 0;
1aa87517 BJ	337	int matchwild = 3, wildcard;
af092e86	338
405c9168	339	for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
1aa87517	340	if (inp->inp_lport != lport)
405c9168	341	continue;
1aa87517	342	wildcard = 0;
5cdc4d65 SL	343	if (inp->inp_laddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	344	if (laddr.s_addr == INADDR_ANY)
1acff8ec BJ	345	wildcard++;
1acff8ec BJ	346	else if (inp->inp_laddr.s_addr != laddr.s_addr)
1aa87517 BJ	347	continue;
1aa87517 BJ	348	} else {
5cdc4d65	349	if (laddr.s_addr != INADDR_ANY)
1aa87517 BJ	350	wildcard++;
1aa87517 BJ	351	}
5cdc4d65 SL	352	if (inp->inp_faddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	353	if (faddr.s_addr == INADDR_ANY)
1acff8ec BJ	354	wildcard++;
1acff8ec BJ	355	else if (inp->inp_faddr.s_addr != faddr.s_addr \|\|
ebcadd38	356	inp->inp_fport != fport)
1aa87517 BJ	357	continue;
1aa87517 BJ	358	} else {
5cdc4d65	359	if (faddr.s_addr != INADDR_ANY)
1aa87517 BJ	360	wildcard++;
1aa87517 BJ	361	}
ebcadd38	362	if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
405c9168	363	continue;
1aa87517 BJ	364	if (wildcard < matchwild) {
	365	match = inp;
	366	matchwild = wildcard;
	367	if (matchwild == 0)
	368	break;
405c9168	369	}
1aa87517	370	}
405c9168	371	return (match);
af092e86	372	}