[unix-history] / usr / src / sys / netns / ns_pcb.c

/*
 * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)ns_pcb.c	7.9 (Berkeley) %G%
 */

#include "param.h"
#include "systm.h"
#include "user.h"
#include "mbuf.h"
#include "socket.h"
#include "socketvar.h"
#include "../net/if.h"
#include "../net/route.h"
#include "protosw.h"

#include "ns.h"
#include "ns_if.h"
#include "ns_pcb.h"

struct	ns_addr zerons_addr;

ns_pcballoc(so, head)
	struct socket *so;
	struct nspcb *head;
{
	struct mbuf *m;
	register struct nspcb *nsp;

	m = m_getclr(M_DONTWAIT, MT_PCB);
	if (m == NULL)
		return (ENOBUFS);
	nsp = mtod(m, struct nspcb *);
	nsp->nsp_socket = so;
	insque(nsp, head);
	so->so_pcb = (caddr_t)nsp;
	return (0);
}
	
ns_pcbbind(nsp, nam)
	register struct nspcb *nsp;
	struct mbuf *nam;
{
	register struct sockaddr_ns *sns;
	u_short lport = 0;

	if (nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr))
		return (EINVAL);
	if (nam == 0)
		goto noname;
	sns = mtod(nam, struct sockaddr_ns *);
	if (nam->m_len != sizeof (*sns))
		return (EINVAL);
	if (!ns_nullhost(sns->sns_addr)) {
		int tport = sns->sns_port;

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

		if (aport < NSPORT_RESERVED && u.u_uid != 0)
			return (EACCES);
		if (ns_pcblookup(&zerons_addr, lport, 0))
			return (EADDRINUSE);
	}
	nsp->nsp_laddr = sns->sns_addr;
noname:
	if (lport == 0)
		do {
			if (nspcb.nsp_lport++ < NSPORT_RESERVED)
				nspcb.nsp_lport = NSPORT_RESERVED;
			lport = htons(nspcb.nsp_lport);
		} while (ns_pcblookup(&zerons_addr, lport, 0));
	nsp->nsp_lport = lport;
	return (0);
}

/*
 * Connect from a socket to a specified address.
 * Both address and port must be specified in argument sns.
 * If don't have a local address for this socket yet,
 * then pick one.
 */
ns_pcbconnect(nsp, nam)
	struct nspcb *nsp;
	struct mbuf *nam;
{
	struct ns_ifaddr *ia;
	register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
	register struct ns_addr *dst;
	register struct route *ro;
	struct ifnet *ifp;

	if (nam->m_len != sizeof (*sns))
		return (EINVAL);
	if (sns->sns_family != AF_NS)
		return (EAFNOSUPPORT);
	if (sns->sns_port==0 || ns_nullhost(sns->sns_addr))
		return (EADDRNOTAVAIL);
	/*
	 * If we haven't bound which network number to use as ours,
	 * we will use the number of the outgoing interface.
	 * This depends on having done a routing lookup, which
	 * we will probably have to do anyway, so we might
	 * as well do it now.  On the other hand if we are
	 * sending to multiple destinations we may have already
	 * done the lookup, so see if we can use the route
	 * from before.  In any case, we only
	 * chose a port number once, even if sending to multiple
	 * destinations.
	 */
	ro = &nsp->nsp_route;
	dst = &satons_addr(ro->ro_dst);
	if (ro->ro_rt) {
		if (nsp->nsp_socket->so_options & SO_DONTROUTE)
			goto flush;
		if (!ns_neteq(nsp->nsp_lastdst, sns->sns_addr))
			goto flush;
		if (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr)) {
			if (((ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
			     == RTF_GATEWAY)
			    || ((ifp = ro->ro_rt->rt_ifp) &&
				 !(ifp->if_flags & IFF_POINTOPOINT))) {
				/* can patch route to avoid rtalloc */
				*dst = sns->sns_addr;
			} else {
		flush:
				RTFREE(ro->ro_rt);
				ro->ro_rt = (struct rtentry *)0;
			}
		}/* else cached route is ok; do nothing */
	}
	nsp->nsp_lastdst = sns->sns_addr;
	if ((nsp->nsp_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_NS;
		    ro->ro_dst.sa_len = sizeof(ro->ro_dst);
		    *dst = sns->sns_addr;
		    dst->x_port = 0;
		    rtalloc(ro);
	}
	if (ns_neteqnn(nsp->nsp_laddr.x_net, ns_zeronet)) {
		/* 
		 * If route is known or can be allocated now,
		 * our src addr is taken from the i/f, else punt.
		 */

		ia = (struct ns_ifaddr *)0;
		/*
		 * If we found a route, use the address
		 * corresponding to the outgoing interface
		 */
		if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp))
			for (ia = ns_ifaddr; ia; ia = ia->ia_next)
				if (ia->ia_ifp == ifp)
					break;
		if (ia == 0) {
			u_short fport = sns->sns_addr.x_port;
			sns->sns_addr.x_port = 0;
			ia = (struct ns_ifaddr *)
				ifa_ifwithdstaddr((struct sockaddr *)sns);
			sns->sns_addr.x_port = fport;
			if (ia == 0)
				ia = ns_iaonnetof(&sns->sns_addr);
			if (ia == 0)
				ia = ns_ifaddr;
			if (ia == 0)
				return (EADDRNOTAVAIL);
		}
		nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net;
	}
	if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0))
		return (EADDRINUSE);
	if (ns_nullhost(nsp->nsp_laddr)) {
		if (nsp->nsp_lport == 0)
			(void) ns_pcbbind(nsp, (struct mbuf *)0);
		nsp->nsp_laddr.x_host = ns_thishost;
	}
	nsp->nsp_faddr = sns->sns_addr;
	/* Includes nsp->nsp_fport = sns->sns_port; */
	return (0);
}

ns_pcbdisconnect(nsp)
	struct nspcb *nsp;
{

	nsp->nsp_faddr = zerons_addr;
	if (nsp->nsp_socket->so_state & SS_NOFDREF)
		ns_pcbdetach(nsp);
}

ns_pcbdetach(nsp)
	struct nspcb *nsp;
{
	struct socket *so = nsp->nsp_socket;

	so->so_pcb = 0;
	sofree(so);
	if (nsp->nsp_route.ro_rt)
		rtfree(nsp->nsp_route.ro_rt);
	remque(nsp);
	(void) m_free(dtom(nsp));
}

ns_setsockaddr(nsp, nam)
	register struct nspcb *nsp;
	struct mbuf *nam;
{
	register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
	
	nam->m_len = sizeof (*sns);
	sns = mtod(nam, struct sockaddr_ns *);
	bzero((caddr_t)sns, sizeof (*sns));
	sns->sns_len = sizeof(*sns);
	sns->sns_family = AF_NS;
	sns->sns_addr = nsp->nsp_laddr;
}

ns_setpeeraddr(nsp, nam)
	register struct nspcb *nsp;
	struct mbuf *nam;
{
	register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *);
	
	nam->m_len = sizeof (*sns);
	sns = mtod(nam, struct sockaddr_ns *);
	bzero((caddr_t)sns, sizeof (*sns));
	sns->sns_len = sizeof(*sns);
	sns->sns_family = AF_NS;
	sns->sns_addr  = nsp->nsp_faddr;
}

/*
 * Pass some notification to all connections of a protocol
 * associated with address dst.  Call the
 * protocol specific routine to handle each connection.
 * Also pass an extra paramter via the nspcb. (which may in fact
 * be a parameter list!)
 */
ns_pcbnotify(dst, errno, notify, param)
	register struct ns_addr *dst;
	long param;
	int errno, (*notify)();
{
	register struct nspcb *nsp, *oinp;
	int s = splimp();

	for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) {
		if (!ns_hosteq(*dst,nsp->nsp_faddr)) {
	next:
			nsp = nsp->nsp_next;
			continue;
		}
		if (nsp->nsp_socket == 0)
			goto next;
		if (errno) 
			nsp->nsp_socket->so_error = errno;
		oinp = nsp;
		nsp = nsp->nsp_next;
		oinp->nsp_notify_param = param;
		(*notify)(oinp);
	}
	splx(s);
}

#ifdef notdef
/*
 * After a routing change, flush old routing
 * and allocate a (hopefully) better one.
 */
ns_rtchange(nsp)
	struct nspcb *nsp;
{
	if (nsp->nsp_route.ro_rt) {
		rtfree(nsp->nsp_route.ro_rt);
		nsp->nsp_route.ro_rt = 0;
		/*
		 * A new route can be allocated the next time
		 * output is attempted.
		 */
	}
	/* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
}
#endif

struct nspcb *
ns_pcblookup(faddr, lport, wildp)
	struct ns_addr *faddr;
	u_short lport;
{
	register struct nspcb *nsp, *match = 0;
	int matchwild = 3, wildcard;
	u_short fport;

	fport = faddr->x_port;
	for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) {
		if (nsp->nsp_lport != lport)
			continue;
		wildcard = 0;
		if (ns_nullhost(nsp->nsp_faddr)) {
			if (!ns_nullhost(*faddr))
				wildcard++;
		} else {
			if (ns_nullhost(*faddr))
				wildcard++;
			else {
				if (!ns_hosteq(nsp->nsp_faddr, *faddr))
					continue;
				if (nsp->nsp_fport != fport) {
					if (nsp->nsp_fport != 0)
						continue;
					else
						wildcard++;
				}
			}
		}
		if (wildcard && wildp==0)
			continue;
		if (wildcard < matchwild) {
			match = nsp;
			matchwild = wildcard;
			if (wildcard == 0)
				break;
		}
	}
	return (match);
}
Commit	Line	Data
8ae0e4b4	1	/*
240edf1f KS	2	* Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
240edf1f KS	3	* All rights reserved.
8ae0e4b4	4	*
dbf0c423	5	* %sccs.include.redist.c%
240edf1f	6	*
dbf0c423	7	* @(#)ns_pcb.c 7.9 (Berkeley) %G%
8ae0e4b4	8	*/
2d433de1 KS	9
	10	#include "param.h"
	11	#include "systm.h"
2d433de1 KS	12	#include "user.h"
	13	#include "mbuf.h"
	14	#include "socket.h"
	15	#include "socketvar.h"
	16	#include "../net/if.h"
	17	#include "../net/route.h"
	18	#include "protosw.h"
	19
	20	#include "ns.h"
	21	#include "ns_if.h"
	22	#include "ns_pcb.h"
	23
	24	struct ns_addr zerons_addr;
	25
	26	ns_pcballoc(so, head)
	27	struct socket *so;
f97be0c9	28	struct nspcb *head;
2d433de1 KS	29	{
	30	struct mbuf *m;
	31	register struct nspcb *nsp;
	32
	33	m = m_getclr(M_DONTWAIT, MT_PCB);
	34	if (m == NULL)
	35	return (ENOBUFS);
	36	nsp = mtod(m, struct nspcb *);
	37	nsp->nsp_socket = so;
	38	insque(nsp, head);
	39	so->so_pcb = (caddr_t)nsp;
	40	return (0);
	41	}
	42
	43	ns_pcbbind(nsp, nam)
	44	register struct nspcb *nsp;
	45	struct mbuf *nam;
	46	{
	47	register struct sockaddr_ns *sns;
	48	u_short lport = 0;
	49
4dcdd98e	50	if (nsp->nsp_lport \|\| !ns_nullhost(nsp->nsp_laddr))
2d433de1 KS	51	return (EINVAL);
	52	if (nam == 0)
	53	goto noname;
	54	sns = mtod(nam, struct sockaddr_ns *);
	55	if (nam->m_len != sizeof (*sns))
	56	return (EINVAL);
	57	if (!ns_nullhost(sns->sns_addr)) {
	58	int tport = sns->sns_port;
	59
	60	sns->sns_port = 0; /* yech... */
	61	if (ifa_ifwithaddr((struct sockaddr *)sns) == 0)
	62	return (EADDRNOTAVAIL);
	63	sns->sns_port = tport;
	64	}
	65	lport = sns->sns_port;
	66	if (lport) {
	67	u_short aport = ntohs(lport);
	68
	69	if (aport < NSPORT_RESERVED && u.u_uid != 0)
	70	return (EACCES);
	71	if (ns_pcblookup(&zerons_addr, lport, 0))
	72	return (EADDRINUSE);
	73	}
	74	nsp->nsp_laddr = sns->sns_addr;
	75	noname:
	76	if (lport == 0)
	77	do {
	78	if (nspcb.nsp_lport++ < NSPORT_RESERVED)
	79	nspcb.nsp_lport = NSPORT_RESERVED;
	80	lport = htons(nspcb.nsp_lport);
	81	} while (ns_pcblookup(&zerons_addr, lport, 0));
	82	nsp->nsp_lport = lport;
	83	return (0);
	84	}
	85
	86	/*
	87	* Connect from a socket to a specified address.
	88	* Both address and port must be specified in argument sns.
	89	* If don't have a local address for this socket yet,
	90	* then pick one.
	91	*/
	92	ns_pcbconnect(nsp, nam)
	93	struct nspcb *nsp;
	94	struct mbuf *nam;
	95	{
	96	struct ns_ifaddr *ia;
2d433de1	97	register struct sockaddr_ns sns = mtod(nam, struct sockaddr_ns );
aa6e5222	98	register struct ns_addr *dst;
88b15994 KS	99	register struct route *ro;
88b15994 KS	100	struct ifnet *ifp;
2d433de1 KS	101
	102	if (nam->m_len != sizeof (*sns))
	103	return (EINVAL);
	104	if (sns->sns_family != AF_NS)
	105	return (EAFNOSUPPORT);
	106	if (sns->sns_port==0 \|\| ns_nullhost(sns->sns_addr))
	107	return (EADDRNOTAVAIL);
88b15994 KS	108	/*
	109	* If we haven't bound which network number to use as ours,
	110	* we will use the number of the outgoing interface.
	111	* This depends on having done a routing lookup, which
	112	* we will probably have to do anyway, so we might
	113	* as well do it now. On the other hand if we are
	114	* sending to multiple destinations we may have already
	115	* done the lookup, so see if we can use the route
	116	* from before. In any case, we only
	117	* chose a port number once, even if sending to multiple
	118	* destinations.
	119	*/
	120	ro = &nsp->nsp_route;
	121	dst = &satons_addr(ro->ro_dst);
	122	if (ro->ro_rt) {
	123	if (nsp->nsp_socket->so_options & SO_DONTROUTE)
	124	goto flush;
	125	if (!ns_neteq(nsp->nsp_lastdst, sns->sns_addr))
	126	goto flush;
	127	if (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr)) {
	128	if (((ro->ro_rt->rt_flags & (RTF_GATEWAY\|RTF_HOST))
	129	== RTF_GATEWAY)
	130	\|\| ((ifp = ro->ro_rt->rt_ifp) &&
	131	!(ifp->if_flags & IFF_POINTOPOINT))) {
	132	/* can patch route to avoid rtalloc */
	133	*dst = sns->sns_addr;
	134	} else {
	135	flush:
	136	RTFREE(ro->ro_rt);
	137	ro->ro_rt = (struct rtentry *)0;
	138	}
	139	}/* else cached route is ok; do nothing */
	140	}
	141	nsp->nsp_lastdst = sns->sns_addr;
	142	if ((nsp->nsp_socket->so_options & SO_DONTROUTE) == 0 && /XXX/
	143	(ro->ro_rt == (struct rtentry *)0 \|\|
	144	ro->ro_rt->rt_ifp == (struct ifnet *)0)) {
	145	/* No route yet, so try to acquire one */
	146	ro->ro_dst.sa_family = AF_NS;
4dcdd98e	147	ro->ro_dst.sa_len = sizeof(ro->ro_dst);
88b15994 KS	148	*dst = sns->sns_addr;
	149	dst->x_port = 0;
	150	rtalloc(ro);
	151	}
	152	if (ns_neteqnn(nsp->nsp_laddr.x_net, ns_zeronet)) {
6d22baac MK	153	/*
	154	* If route is known or can be allocated now,
	155	* our src addr is taken from the i/f, else punt.
	156	*/
2d433de1	157
6d22baac	158	ia = (struct ns_ifaddr *)0;
6d22baac MK	159	/*
	160	* If we found a route, use the address
	161	* corresponding to the outgoing interface
	162	*/
	163	if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp))
	164	for (ia = ns_ifaddr; ia; ia = ia->ia_next)
	165	if (ia->ia_ifp == ifp)
	166	break;
	167	if (ia == 0) {
	168	u_short fport = sns->sns_addr.x_port;
	169	sns->sns_addr.x_port = 0;
	170	ia = (struct ns_ifaddr *)
	171	ifa_ifwithdstaddr((struct sockaddr *)sns);
	172	sns->sns_addr.x_port = fport;
	173	if (ia == 0)
	174	ia = ns_iaonnetof(&sns->sns_addr);
2d433de1 KS	175	if (ia == 0)
	176	ia = ns_ifaddr;
	177	if (ia == 0)
	178	return (EADDRNOTAVAIL);
	179	}
aa6e5222	180	nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net;
2d433de1 KS	181	}
	182	if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0))
	183	return (EADDRINUSE);
	184	if (ns_nullhost(nsp->nsp_laddr)) {
	185	if (nsp->nsp_lport == 0)
f97be0c9	186	(void) ns_pcbbind(nsp, (struct mbuf *)0);
2d433de1 KS	187	nsp->nsp_laddr.x_host = ns_thishost;
	188	}
	189	nsp->nsp_faddr = sns->sns_addr;
	190	/* Includes nsp->nsp_fport = sns->sns_port; */
	191	return (0);
	192	}
	193
	194	ns_pcbdisconnect(nsp)
	195	struct nspcb *nsp;
	196	{
	197
	198	nsp->nsp_faddr = zerons_addr;
	199	if (nsp->nsp_socket->so_state & SS_NOFDREF)
	200	ns_pcbdetach(nsp);
	201	}
	202
	203	ns_pcbdetach(nsp)
	204	struct nspcb *nsp;
	205	{
	206	struct socket *so = nsp->nsp_socket;
	207
	208	so->so_pcb = 0;
	209	sofree(so);
	210	if (nsp->nsp_route.ro_rt)
	211	rtfree(nsp->nsp_route.ro_rt);
	212	remque(nsp);
	213	(void) m_free(dtom(nsp));
	214	}
	215
	216	ns_setsockaddr(nsp, nam)
	217	register struct nspcb *nsp;
	218	struct mbuf *nam;
	219	{
	220	register struct sockaddr_ns sns = mtod(nam, struct sockaddr_ns );
	221
	222	nam->m_len = sizeof (*sns);
	223	sns = mtod(nam, struct sockaddr_ns *);
	224	bzero((caddr_t)sns, sizeof (*sns));
4dcdd98e	225	sns->sns_len = sizeof(*sns);
2d433de1 KS	226	sns->sns_family = AF_NS;
	227	sns->sns_addr = nsp->nsp_laddr;
	228	}
	229
	230	ns_setpeeraddr(nsp, nam)
	231	register struct nspcb *nsp;
	232	struct mbuf *nam;
	233	{
	234	register struct sockaddr_ns sns = mtod(nam, struct sockaddr_ns );
	235
	236	nam->m_len = sizeof (*sns);
	237	sns = mtod(nam, struct sockaddr_ns *);
	238	bzero((caddr_t)sns, sizeof (*sns));
4dcdd98e	239	sns->sns_len = sizeof(*sns);
2d433de1 KS	240	sns->sns_family = AF_NS;
	241	sns->sns_addr = nsp->nsp_faddr;
	242	}
	243
	244	/*
	245	* Pass some notification to all connections of a protocol
	246	* associated with address dst. Call the
	247	* protocol specific routine to handle each connection.
	248	* Also pass an extra paramter via the nspcb. (which may in fact
	249	* be a parameter list!)
	250	*/
	251	ns_pcbnotify(dst, errno, notify, param)
	252	register struct ns_addr *dst;
	253	long param;
	254	int errno, (*notify)();
	255	{
	256	register struct nspcb nsp, oinp;
	257	int s = splimp();
	258
	259	for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) {
	260	if (!ns_hosteq(*dst,nsp->nsp_faddr)) {
	261	next:
	262	nsp = nsp->nsp_next;
	263	continue;
	264	}
	265	if (nsp->nsp_socket == 0)
	266	goto next;
	267	if (errno)
	268	nsp->nsp_socket->so_error = errno;
	269	oinp = nsp;
	270	nsp = nsp->nsp_next;
	271	oinp->nsp_notify_param = param;
	272	(*notify)(oinp);
	273	}
	274	splx(s);
	275	}
	276
58bca61d	277	#ifdef notdef
2d433de1 KS	278	/*
	279	* After a routing change, flush old routing
	280	* and allocate a (hopefully) better one.
	281	*/
	282	ns_rtchange(nsp)
	283	struct nspcb *nsp;
	284	{
	285	if (nsp->nsp_route.ro_rt) {
	286	rtfree(nsp->nsp_route.ro_rt);
	287	nsp->nsp_route.ro_rt = 0;
	288	/*
	289	* A new route can be allocated the next time
	290	* output is attempted.
	291	*/
	292	}
	293	/* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */
	294	}
58bca61d	295	#endif
2d433de1 KS	296
	297	struct nspcb *
	298	ns_pcblookup(faddr, lport, wildp)
	299	struct ns_addr *faddr;
	300	u_short lport;
	301	{
	302	register struct nspcb nsp, match = 0;
	303	int matchwild = 3, wildcard;
	304	u_short fport;
	305
	306	fport = faddr->x_port;
	307	for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) {
	308	if (nsp->nsp_lport != lport)
	309	continue;
	310	wildcard = 0;
	311	if (ns_nullhost(nsp->nsp_faddr)) {
	312	if (!ns_nullhost(*faddr))
	313	wildcard++;
	314	} else {
	315	if (ns_nullhost(*faddr))
	316	wildcard++;
	317	else {
	318	if (!ns_hosteq(nsp->nsp_faddr, *faddr))
	319	continue;
4dcdd98e KS	320	if (nsp->nsp_fport != fport) {
4dcdd98e KS	321	if (nsp->nsp_fport != 0)
2d433de1 KS	322	continue;
	323	else
	324	wildcard++;
	325	}
	326	}
	327	}
	328	if (wildcard && wildp==0)
	329	continue;
	330	if (wildcard < matchwild) {
	331	match = nsp;
	332	matchwild = wildcard;
	333	if (wildcard == 0)
	334	break;
	335	}
	336	}
	337	return (match);
	338	}