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

/*
 * Copyright (c) 1982 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)in_pcb.c	6.12 (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) {
		ia = in_iaonnetof(in_netof(sin->sin_addr));
		if (ia == (struct in_ifaddr *)0) {
			register struct route *ro;
			struct ifnet *ifp;

			/* 
			 * 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) {
				RTFREE(ro->ro_rt);
				ro->ro_rt = (struct rtentry *)0;
			}
			if ((ro->ro_rt == (struct rtentry *)0) ||
			    (ifp = 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 (ro->ro_rt == (struct rtentry *)0)
					ifp = (struct ifnet *)0;
				else
					ifp = ro->ro_rt->rt_ifp;
			}
			if (ifp) {
				for (ia = in_ifaddr; ia; ia = ia->ia_next)
					if (ia->ia_ifp == ifp)
						break;
			}
			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)
			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)
		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)
			rtrequest(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 KM	1	/*
	2	* Copyright (c) 1982 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
552918f2	6	* @(#)in_pcb.c 6.12 (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) {
552918f2	138	ia = in_iaonnetof(in_netof(sin->sin_addr));
5d305bdd	139	if (ia == (struct in_ifaddr *)0) {
99578149	140	register struct route *ro;
5d305bdd	141	struct ifnet *ifp;
99578149 MK	142
	143	/*
	144	* If route is known or can be allocated now,
	145	* our src addr is taken from the i/f, else punt.
72e4f44e	146	*/
99578149	147	ro = &inp->inp_route;
99578149 MK	148	if (ro->ro_rt &&
	149	satosin(&ro->ro_dst)->sin_addr.s_addr !=
	150	sin->sin_addr.s_addr) {
	151	RTFREE(ro->ro_rt);
	152	ro->ro_rt = (struct rtentry *)0;
	153	}
	154	if ((ro->ro_rt == (struct rtentry *)0) \|\|
	155	(ifp = ro->ro_rt->rt_ifp) == (struct ifnet *)0) {
	156	/* No route yet, so try to acquire one */
	157	ro->ro_dst.sa_family = AF_INET;
	158	((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
	159	sin->sin_addr;
	160	rtalloc(ro);
552918f2	161	if (ro->ro_rt == (struct rtentry *)0)
3f319daa	162	ifp = (struct ifnet *)0;
99578149	163	else
3f319daa	164	ifp = ro->ro_rt->rt_ifp;
99578149	165	}
3f319daa MK	166	if (ifp) {
	167	for (ia = in_ifaddr; ia; ia = ia->ia_next)
	168	if (ia->ia_ifp == ifp)
	169	break;
552918f2	170	}
5d305bdd MK	171	if (ia == 0)
	172	ia = in_ifaddr;
	173	if (ia == 0)
72e4f44e	174	return (EADDRNOTAVAIL);
ee787340	175	}
5d305bdd	176	ifaddr = (struct sockaddr_in *)&ia->ia_addr;
1aa87517 BJ	177	}
1aa87517 BJ	178	if (in_pcblookup(inp->inp_head,
1acff8ec BJ	179	sin->sin_addr,
1acff8ec BJ	180	sin->sin_port,
ee787340	181	inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
1acff8ec BJ	182	inp->inp_lport,
1acff8ec BJ	183	0))
b454c3ea	184	return (EADDRINUSE);
3cd2053b SL	185	if (inp->inp_laddr.s_addr == INADDR_ANY) {
	186	if (inp->inp_lport == 0)
	187	in_pcbbind(inp, (struct mbuf *)0);
ee787340	188	inp->inp_laddr = ifaddr->sin_addr;
3cd2053b	189	}
4ad99bae BJ	190	inp->inp_faddr = sin->sin_addr;
4ad99bae BJ	191	inp->inp_fport = sin->sin_port;
2b4b57cd BJ	192	return (0);
	193	}
	194
405c9168 BJ	195	in_pcbdisconnect(inp)
	196	struct inpcb *inp;
	197	{
	198
5cdc4d65	199	inp->inp_faddr.s_addr = INADDR_ANY;
ebcadd38	200	inp->inp_fport = 0;
8f0d18de	201	if (inp->inp_socket->so_state & SS_NOFDREF)
405c9168 BJ	202	in_pcbdetach(inp);
	203	}
	204
	205	in_pcbdetach(inp)
af092e86 BJ	206	struct inpcb *inp;
	207	{
	208	struct socket *so = inp->inp_socket;
	209
ba55c9af BJ	210	so->so_pcb = 0;
ba55c9af BJ	211	sofree(so);
c9aca561 MK	212	if (inp->inp_options)
c9aca561 MK	213	m_free(inp->inp_options);
c124e997	214	if (inp->inp_route.ro_rt)
f6311fb6	215	rtfree(inp->inp_route.ro_rt);
7545cf09	216	remque(inp);
cdad2eb1	217	(void) m_free(dtom(inp));
af092e86 BJ	218	}
af092e86 BJ	219
8075bb0e	220	in_setsockaddr(inp, nam)
126472ab	221	register struct inpcb *inp;
8075bb0e	222	struct mbuf *nam;
126472ab	223	{
8075bb0e BJ	224	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
	225
	226	nam->m_len = sizeof (*sin);
	227	sin = mtod(nam, struct sockaddr_in *);
126472ab SL	228	bzero((caddr_t)sin, sizeof (*sin));
	229	sin->sin_family = AF_INET;
	230	sin->sin_port = inp->inp_lport;
	231	sin->sin_addr = inp->inp_laddr;
	232	}
	233
a7343092 SL	234	in_setpeeraddr(inp, nam)
	235	register struct inpcb *inp;
	236	struct mbuf *nam;
	237	{
	238	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
	239
	240	nam->m_len = sizeof (*sin);
	241	sin = mtod(nam, struct sockaddr_in *);
	242	bzero((caddr_t)sin, sizeof (*sin));
	243	sin->sin_family = AF_INET;
	244	sin->sin_port = inp->inp_fport;
	245	sin->sin_addr = inp->inp_faddr;
	246	}
	247
72e4f44e	248	/*
842b6bb5	249	* Pass some notification to all connections of a protocol
c9aca561 MK	250	* associated with address dst. Call the protocol specific
c9aca561 MK	251	* routine (if any) to handle each connection.
72e4f44e	252	*/
842b6bb5	253	in_pcbnotify(head, dst, errno, notify)
72e4f44e SL	254	struct inpcb *head;
72e4f44e SL	255	register struct in_addr *dst;
842b6bb5	256	int errno, (*notify)();
72e4f44e SL	257	{
	258	register struct inpcb inp, oinp;
	259	int s = splimp();
	260
72e4f44e	261	for (inp = head->inp_next; inp != head;) {
c9aca561 MK	262	if (inp->inp_faddr.s_addr != dst->s_addr \|\|
c9aca561 MK	263	inp->inp_socket == 0) {
72e4f44e SL	264	inp = inp->inp_next;
	265	continue;
	266	}
842b6bb5 MK	267	if (errno)
842b6bb5 MK	268	inp->inp_socket->so_error = errno;
72e4f44e SL	269	oinp = inp;
72e4f44e SL	270	inp = inp->inp_next;
c9aca561 MK	271	if (notify)
c9aca561 MK	272	(*notify)(oinp);
72e4f44e SL	273	}
	274	splx(s);
	275	}
	276
2ba2de86 MK	277	/*
	278	* Check for alternatives when higher level complains
	279	* about service problems. For now, invalidate cached
	280	* routing information. If the route was created dynamically
	281	* (by a redirect), time to try a default gateway again.
	282	*/
	283	in_losing(inp)
	284	struct inpcb *inp;
	285	{
	286	register struct rtentry *rt;
	287
	288	if ((rt = inp->inp_route.ro_rt)) {
	289	if (rt->rt_flags & RTF_DYNAMIC)
	290	rtrequest(SIOCDELRT, rt);
	291	rtfree(rt);
	292	inp->inp_route.ro_rt = 0;
	293	/*
	294	* A new route can be allocated
	295	* the next time output is attempted.
	296	*/
	297	}
	298	}
	299
842b6bb5 MK	300	/*
	301	* After a routing change, flush old routing
	302	* and allocate a (hopefully) better one.
	303	*/
	304	in_rtchange(inp)
2ba2de86	305	register struct inpcb *inp;
842b6bb5 MK	306	{
	307	if (inp->inp_route.ro_rt) {
	308	rtfree(inp->inp_route.ro_rt);
	309	inp->inp_route.ro_rt = 0;
	310	/*
	311	* A new route can be allocated the next time
	312	* output is attempted.
	313	*/
	314	}
842b6bb5 MK	315	}
842b6bb5 MK	316
cdad2eb1	317	struct inpcb *
ebcadd38	318	in_pcblookup(head, faddr, fport, laddr, lport, flags)
af092e86	319	struct inpcb *head;
4ad99bae	320	struct in_addr faddr, laddr;
af092e86	321	u_short fport, lport;
ebcadd38	322	int flags;
af092e86	323	{
1aa87517 BJ	324	register struct inpcb inp, match = 0;
1aa87517 BJ	325	int matchwild = 3, wildcard;
af092e86	326
405c9168	327	for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
1aa87517	328	if (inp->inp_lport != lport)
405c9168	329	continue;
1aa87517	330	wildcard = 0;
5cdc4d65 SL	331	if (inp->inp_laddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	332	if (laddr.s_addr == INADDR_ANY)
1acff8ec BJ	333	wildcard++;
1acff8ec BJ	334	else if (inp->inp_laddr.s_addr != laddr.s_addr)
1aa87517 BJ	335	continue;
1aa87517 BJ	336	} else {
5cdc4d65	337	if (laddr.s_addr != INADDR_ANY)
1aa87517 BJ	338	wildcard++;
1aa87517 BJ	339	}
5cdc4d65 SL	340	if (inp->inp_faddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	341	if (faddr.s_addr == INADDR_ANY)
1acff8ec BJ	342	wildcard++;
1acff8ec BJ	343	else if (inp->inp_faddr.s_addr != faddr.s_addr \|\|
ebcadd38	344	inp->inp_fport != fport)
1aa87517 BJ	345	continue;
1aa87517 BJ	346	} else {
5cdc4d65	347	if (faddr.s_addr != INADDR_ANY)
1aa87517 BJ	348	wildcard++;
1aa87517 BJ	349	}
ebcadd38	350	if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
405c9168	351	continue;
1aa87517 BJ	352	if (wildcard < matchwild) {
	353	match = inp;
	354	matchwild = wildcard;
	355	if (matchwild == 0)
	356	break;
405c9168	357	}
1aa87517	358	}
405c9168	359	return (match);
af092e86	360	}