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

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of California at Berkeley. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 *
 *	@(#)in_pcb.c	7.6 (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)
	register 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;
	
	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)
	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_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.
2b6b6284	3	* All rights reserved.
8ae0e4b4	4	*
2b6b6284 KB	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that this notice is preserved and that due credit is given
	7	* to the University of California at Berkeley. The name of the University
	8	* may not be used to endorse or promote products derived from this
	9	* software without specific prior written permission. This software
	10	* is provided ``as is'' without express or implied warranty.
	11	*
	12	* @(#)in_pcb.c 7.6 (Berkeley) %G%
8ae0e4b4	13	*/
af092e86	14
20666ad3 JB	15	#include "param.h"
	16	#include "systm.h"
	17	#include "dir.h"
	18	#include "user.h"
	19	#include "mbuf.h"
	20	#include "socket.h"
	21	#include "socketvar.h"
2ba2de86	22	#include "ioctl.h"
20666ad3 JB	23	#include "in.h"
20666ad3 JB	24	#include "in_systm.h"
4ad99bae	25	#include "../net/if.h"
c124e997	26	#include "../net/route.h"
20666ad3	27	#include "in_pcb.h"
5d305bdd	28	#include "in_var.h"
20666ad3	29	#include "protosw.h"
af092e86	30
1a3dbf93	31	struct in_addr zeroin_addr;
405c9168	32
8f0d18de BJ	33	in_pcballoc(so, head)
	34	struct socket *so;
	35	struct inpcb *head;
	36	{
	37	struct mbuf *m;
	38	register struct inpcb *inp;
	39
cce93e4b	40	m = m_getclr(M_DONTWAIT, MT_PCB);
5cdc4d65	41	if (m == NULL)
8f0d18de BJ	42	return (ENOBUFS);
	43	inp = mtod(m, struct inpcb *);
	44	inp->inp_head = head;
	45	inp->inp_socket = so;
	46	insque(inp, head);
	47	so->so_pcb = (caddr_t)inp;
	48	return (0);
	49	}
	50
8075bb0e	51	in_pcbbind(inp, nam)
8f0d18de	52	register struct inpcb *inp;
8075bb0e	53	struct mbuf *nam;
8f0d18de BJ	54	{
	55	register struct socket *so = inp->inp_socket;
	56	register struct inpcb *head = inp->inp_head;
8075bb0e	57	register struct sockaddr_in *sin;
8f0d18de BJ	58	u_short lport = 0;
8f0d18de BJ	59
5d305bdd	60	if (in_ifaddr == 0)
8f0d18de	61	return (EADDRNOTAVAIL);
5cdc4d65	62	if (inp->inp_lport \|\| inp->inp_laddr.s_addr != INADDR_ANY)
8075bb0e BJ	63	return (EINVAL);
	64	if (nam == 0)
	65	goto noname;
	66	sin = mtod(nam, struct sockaddr_in *);
	67	if (nam->m_len != sizeof (*sin))
	68	return (EINVAL);
5cdc4d65	69	if (sin->sin_addr.s_addr != INADDR_ANY) {
8075bb0e	70	int tport = sin->sin_port;
8f0d18de	71
8075bb0e	72	sin->sin_port = 0; /* yech... */
5d305bdd	73	if (ifa_ifwithaddr((struct sockaddr *)sin) == 0)
8075bb0e BJ	74	return (EADDRNOTAVAIL);
8075bb0e BJ	75	sin->sin_port = tport;
8f0d18de	76	}
8075bb0e BJ	77	lport = sin->sin_port;
8075bb0e BJ	78	if (lport) {
f2d10020	79	u_short aport = ntohs(lport);
8075bb0e	80	int wild = 0;
c124e997	81
8075bb0e BJ	82	/* GROSS */
	83	if (aport < IPPORT_RESERVED && u.u_uid != 0)
	84	return (EACCES);
b4a3d4a7 SL	85	/* even GROSSER, but this is the Internet */
	86	if ((so->so_options & SO_REUSEADDR) == 0 &&
	87	((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 \|\|
	88	(so->so_options & SO_ACCEPTCONN) == 0))
8075bb0e BJ	89	wild = INPLOOKUP_WILDCARD;
	90	if (in_pcblookup(head,
	91	zeroin_addr, 0, sin->sin_addr, lport, wild))
	92	return (EADDRINUSE);
4ad99bae	93	}
8075bb0e BJ	94	inp->inp_laddr = sin->sin_addr;
8075bb0e BJ	95	noname:
b454c3ea BJ	96	if (lport == 0)
b454c3ea BJ	97	do {
f44e5691 MK	98	if (head->inp_lport++ < IPPORT_RESERVED \|\|
f44e5691 MK	99	head->inp_lport > IPPORT_USERRESERVED)
1aa87517	100	head->inp_lport = IPPORT_RESERVED;
b454c3ea	101	lport = htons(head->inp_lport);
1aa87517 BJ	102	} while (in_pcblookup(head,
1aa87517 BJ	103	zeroin_addr, 0, inp->inp_laddr, lport, 0));
4ad99bae	104	inp->inp_lport = lport;
4ad99bae	105	return (0);
af092e86 BJ	106	}
af092e86 BJ	107
1acff8ec BJ	108	/*
	109	* Connect from a socket to a specified address.
	110	* Both address and port must be specified in argument sin.
	111	* If don't have a local address for this socket yet,
	112	* then pick one.
	113	*/
8075bb0e	114	in_pcbconnect(inp, nam)
552daad2	115	register struct inpcb *inp;
8075bb0e	116	struct mbuf *nam;
2b4b57cd	117	{
5d305bdd	118	struct in_ifaddr *ia;
ee787340	119	struct sockaddr_in *ifaddr;
8075bb0e	120	register struct sockaddr_in sin = mtod(nam, struct sockaddr_in );
2b4b57cd	121
8075bb0e BJ	122	if (nam->m_len != sizeof (*sin))
8075bb0e BJ	123	return (EINVAL);
4ad99bae BJ	124	if (sin->sin_family != AF_INET)
4ad99bae BJ	125	return (EAFNOSUPPORT);
5d305bdd	126	if (sin->sin_port == 0)
4ad99bae	127	return (EADDRNOTAVAIL);
5d305bdd	128	if (in_ifaddr) {
3f319daa MK	129	/*
	130	* If the destination address is INADDR_ANY,
	131	* use the primary local address.
	132	* If the supplied address is INADDR_BROADCAST,
	133	* and the primary interface supports broadcast,
	134	* choose the broadcast address for that interface.
	135	*/
5d305bdd MK	136	#define satosin(sa) ((struct sockaddr_in *)(sa))
5d305bdd MK	137	if (sin->sin_addr.s_addr == INADDR_ANY)
3f319daa	138	sin->sin_addr = IA_SIN(in_ifaddr)->sin_addr;
c9aca561	139	else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST &&
3f319daa MK	140	(in_ifaddr->ia_ifp->if_flags & IFF_BROADCAST))
3f319daa MK	141	sin->sin_addr = satosin(&in_ifaddr->ia_broadaddr)->sin_addr;
5d305bdd	142	}
5cdc4d65	143	if (inp->inp_laddr.s_addr == INADDR_ANY) {
c198b4ed MK	144	register struct route *ro;
c198b4ed MK	145	struct ifnet *ifp;
99578149	146
c198b4ed MK	147	ia = (struct in_ifaddr *)0;
	148	/*
	149	* If route is known or can be allocated now,
	150	* our src addr is taken from the i/f, else punt.
	151	*/
	152	ro = &inp->inp_route;
	153	if (ro->ro_rt &&
1bf75d4e MK	154	(satosin(&ro->ro_dst)->sin_addr.s_addr !=
	155	sin->sin_addr.s_addr \|\|
	156	inp->inp_socket->so_options & SO_DONTROUTE)) {
c198b4ed MK	157	RTFREE(ro->ro_rt);
	158	ro->ro_rt = (struct rtentry *)0;
	159	}
9f21d23f MK	160	if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /XXX/
9f21d23f MK	161	(ro->ro_rt == (struct rtentry *)0 \|\|
d4538fe2	162	ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
c198b4ed MK	163	/* No route yet, so try to acquire one */
	164	ro->ro_dst.sa_family = AF_INET;
	165	((struct sockaddr_in *) &ro->ro_dst)->sin_addr =
	166	sin->sin_addr;
	167	rtalloc(ro);
ee787340	168	}
d4538fe2 MK	169	/*
	170	* If we found a route, use the address
	171	* corresponding to the outgoing interface
	172	* unless it is the loopback (in case a route
	173	* to our address on another net goes to loopback).
	174	*/
	175	if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp) &&
	176	(ifp->if_flags & IFF_LOOPBACK) == 0)
	177	for (ia = in_ifaddr; ia; ia = ia->ia_next)
	178	if (ia->ia_ifp == ifp)
	179	break;
9f21d23f	180	if (ia == 0) {
1bf75d4e MK	181	int fport = sin->sin_port;
	182
	183	sin->sin_port = 0;
9f21d23f MK	184	ia = (struct in_ifaddr *)
9f21d23f MK	185	ifa_ifwithdstaddr((struct sockaddr *)sin);
1bf75d4e	186	sin->sin_port = fport;
9f21d23f MK	187	if (ia == 0)
	188	ia = in_iaonnetof(in_netof(sin->sin_addr));
	189	if (ia == 0)
	190	ia = in_ifaddr;
	191	if (ia == 0)
	192	return (EADDRNOTAVAIL);
c198b4ed	193	}
5d305bdd	194	ifaddr = (struct sockaddr_in *)&ia->ia_addr;
1aa87517 BJ	195	}
1aa87517 BJ	196	if (in_pcblookup(inp->inp_head,
1acff8ec BJ	197	sin->sin_addr,
1acff8ec BJ	198	sin->sin_port,
ee787340	199	inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr,
1acff8ec BJ	200	inp->inp_lport,
1acff8ec BJ	201	0))
b454c3ea	202	return (EADDRINUSE);
3cd2053b SL	203	if (inp->inp_laddr.s_addr == INADDR_ANY) {
3cd2053b SL	204	if (inp->inp_lport == 0)
8011f5df	205	(void)in_pcbbind(inp, (struct mbuf *)0);
ee787340	206	inp->inp_laddr = ifaddr->sin_addr;
3cd2053b	207	}
4ad99bae BJ	208	inp->inp_faddr = sin->sin_addr;
4ad99bae BJ	209	inp->inp_fport = sin->sin_port;
2b4b57cd BJ	210	return (0);
	211	}
	212
405c9168 BJ	213	in_pcbdisconnect(inp)
	214	struct inpcb *inp;
	215	{
	216
5cdc4d65	217	inp->inp_faddr.s_addr = INADDR_ANY;
ebcadd38	218	inp->inp_fport = 0;
8f0d18de	219	if (inp->inp_socket->so_state & SS_NOFDREF)
405c9168 BJ	220	in_pcbdetach(inp);
	221	}
	222
	223	in_pcbdetach(inp)
af092e86 BJ	224	struct inpcb *inp;
	225	{
	226	struct socket *so = inp->inp_socket;
	227
ba55c9af BJ	228	so->so_pcb = 0;
ba55c9af BJ	229	sofree(so);
c9aca561	230	if (inp->inp_options)
8011f5df	231	(void)m_free(inp->inp_options);
c124e997	232	if (inp->inp_route.ro_rt)
f6311fb6	233	rtfree(inp->inp_route.ro_rt);
7545cf09	234	remque(inp);
cdad2eb1	235	(void) m_free(dtom(inp));
af092e86 BJ	236	}
af092e86 BJ	237
8075bb0e	238	in_setsockaddr(inp, nam)
126472ab	239	register struct inpcb *inp;
8075bb0e	240	struct mbuf *nam;
126472ab	241	{
2aa0644d	242	register struct sockaddr_in *sin;
8075bb0e BJ	243
	244	nam->m_len = sizeof (*sin);
	245	sin = mtod(nam, struct sockaddr_in *);
126472ab SL	246	bzero((caddr_t)sin, sizeof (*sin));
	247	sin->sin_family = AF_INET;
	248	sin->sin_port = inp->inp_lport;
	249	sin->sin_addr = inp->inp_laddr;
	250	}
	251
a7343092	252	in_setpeeraddr(inp, nam)
552daad2	253	struct inpcb *inp;
a7343092 SL	254	struct mbuf *nam;
a7343092 SL	255	{
2aa0644d	256	register struct sockaddr_in *sin;
a7343092 SL	257
	258	nam->m_len = sizeof (*sin);
	259	sin = mtod(nam, struct sockaddr_in *);
	260	bzero((caddr_t)sin, sizeof (*sin));
	261	sin->sin_family = AF_INET;
	262	sin->sin_port = inp->inp_fport;
	263	sin->sin_addr = inp->inp_faddr;
	264	}
	265
72e4f44e	266	/*
842b6bb5	267	* Pass some notification to all connections of a protocol
c9aca561 MK	268	* associated with address dst. Call the protocol specific
c9aca561 MK	269	* routine (if any) to handle each connection.
72e4f44e	270	*/
842b6bb5	271	in_pcbnotify(head, dst, errno, notify)
72e4f44e SL	272	struct inpcb *head;
72e4f44e SL	273	register struct in_addr *dst;
842b6bb5	274	int errno, (*notify)();
72e4f44e SL	275	{
	276	register struct inpcb inp, oinp;
	277	int s = splimp();
	278
72e4f44e	279	for (inp = head->inp_next; inp != head;) {
c9aca561 MK	280	if (inp->inp_faddr.s_addr != dst->s_addr \|\|
c9aca561 MK	281	inp->inp_socket == 0) {
72e4f44e SL	282	inp = inp->inp_next;
	283	continue;
	284	}
842b6bb5 MK	285	if (errno)
842b6bb5 MK	286	inp->inp_socket->so_error = errno;
72e4f44e SL	287	oinp = inp;
72e4f44e SL	288	inp = inp->inp_next;
c9aca561 MK	289	if (notify)
c9aca561 MK	290	(*notify)(oinp);
72e4f44e SL	291	}
	292	splx(s);
	293	}
	294
2ba2de86 MK	295	/*
	296	* Check for alternatives when higher level complains
	297	* about service problems. For now, invalidate cached
	298	* routing information. If the route was created dynamically
	299	* (by a redirect), time to try a default gateway again.
	300	*/
	301	in_losing(inp)
	302	struct inpcb *inp;
	303	{
	304	register struct rtentry *rt;
	305
	306	if ((rt = inp->inp_route.ro_rt)) {
	307	if (rt->rt_flags & RTF_DYNAMIC)
03510dd5	308	(void) rtrequest((int)SIOCDELRT, rt);
2ba2de86 MK	309	rtfree(rt);
	310	inp->inp_route.ro_rt = 0;
	311	/*
	312	* A new route can be allocated
	313	* the next time output is attempted.
	314	*/
	315	}
	316	}
	317
842b6bb5 MK	318	/*
	319	* After a routing change, flush old routing
	320	* and allocate a (hopefully) better one.
	321	*/
	322	in_rtchange(inp)
2ba2de86	323	register struct inpcb *inp;
842b6bb5 MK	324	{
	325	if (inp->inp_route.ro_rt) {
	326	rtfree(inp->inp_route.ro_rt);
	327	inp->inp_route.ro_rt = 0;
	328	/*
	329	* A new route can be allocated the next time
	330	* output is attempted.
	331	*/
	332	}
842b6bb5 MK	333	}
842b6bb5 MK	334
cdad2eb1	335	struct inpcb *
ebcadd38	336	in_pcblookup(head, faddr, fport, laddr, lport, flags)
af092e86	337	struct inpcb *head;
4ad99bae	338	struct in_addr faddr, laddr;
af092e86	339	u_short fport, lport;
ebcadd38	340	int flags;
af092e86	341	{
1aa87517 BJ	342	register struct inpcb inp, match = 0;
1aa87517 BJ	343	int matchwild = 3, wildcard;
af092e86	344
405c9168	345	for (inp = head->inp_next; inp != head; inp = inp->inp_next) {
1aa87517	346	if (inp->inp_lport != lport)
405c9168	347	continue;
1aa87517	348	wildcard = 0;
5cdc4d65 SL	349	if (inp->inp_laddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	350	if (laddr.s_addr == INADDR_ANY)
1acff8ec BJ	351	wildcard++;
1acff8ec BJ	352	else if (inp->inp_laddr.s_addr != laddr.s_addr)
1aa87517 BJ	353	continue;
1aa87517 BJ	354	} else {
5cdc4d65	355	if (laddr.s_addr != INADDR_ANY)
1aa87517 BJ	356	wildcard++;
1aa87517 BJ	357	}
5cdc4d65 SL	358	if (inp->inp_faddr.s_addr != INADDR_ANY) {
5cdc4d65 SL	359	if (faddr.s_addr == INADDR_ANY)
1acff8ec BJ	360	wildcard++;
1acff8ec BJ	361	else if (inp->inp_faddr.s_addr != faddr.s_addr \|\|
ebcadd38	362	inp->inp_fport != fport)
1aa87517 BJ	363	continue;
1aa87517 BJ	364	} else {
5cdc4d65	365	if (faddr.s_addr != INADDR_ANY)
1aa87517 BJ	366	wildcard++;
1aa87517 BJ	367	}
ebcadd38	368	if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0)
405c9168	369	continue;
1aa87517 BJ	370	if (wildcard < matchwild) {
	371	match = inp;
	372	matchwild = wildcard;
	373	if (matchwild == 0)
	374	break;
405c9168	375	}
1aa87517	376	}
405c9168	377	return (match);
af092e86	378	}