[unix-history] / usr / src / sys / netccitt / if_x25subr.c

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)if_x25subr.c	7.5 (Berkeley) %G%
 */

#include "param.h"
#include "systm.h"
#include "malloc.h"
#include "mbuf.h"
#include "protosw.h"
#include "socket.h"
#include "ioctl.h"
#include "errno.h"
#include "syslog.h"

#include "../net/if.h"
#include "../net/netisr.h"
#include "../net/route.h"

#include "x25.h"
#include "x25error.h"
#include "pk_var.h"

#include "machine/mtpr.h"

#ifdef INET
#include "../netinet/in.h"
#include "../netinet/in_var.h"
#endif

#ifdef NS
#include "../netns/ns.h"
#include "../netns/ns_if.h"
#endif

#ifdef ISO
#include "../netiso/argo_debug.h"
#include "../netiso/iso.h"
#include "../netiso/iso_var.h"
#endif

extern	struct ifnet loif;

#define senderr(x) {error = x; goto bad;}
/*
 * X.25 output routine.
 */
x25_ifoutput(ifp, m0, dst, rt)
struct	ifnet *ifp;
struct	mbuf *m0;
struct	sockaddr *dst;
register struct	rtentry *rt;
{
	register struct mbuf *m;
	register struct rtextension_x25 *rtx;
	register struct pq *pq;
	struct pklcd *lcp;
	struct x25_ifaddr *ia;
	struct mbuf    *prev;
	int             s, error = 0, flags = 0;
	union imp_addr  imp_addr;
	int flags = 0;

	if ((ifp->if_flags & IFF_UP) == 0)
		return (ENETDOWN);
	if (rt == 0 ||
	    ((rt->rt_flags & RTF_GATEWAY) && (dst = rt->rt_gateway))) {
		if ((rt = rtalloc1(dst, 1)) == 0)
			return (EHOSTUNREACH);
		rt->rt_refcnt++;
		flags = XRF_RTHELD;
	}
	/*
	 * Sanity checks.
	 */
	if ((rt->rt_ifp != ifp) ||
	    (rt->rt_flags & (RTF_CLONING | RTF_GATEWAY)) ||
	    ((rtx = (struct rtextension_x25 *)rt->rt_llinfo) == 0)) {
		printf("Inconsistent call to x25_output, should panic\n");
		senderr(ENETUNREACH);
	}
    {
	register struct ifaddr *ifa;
	for (ifa = ifp->if_addrlist; ; ifa = ifa->ifa_next) {
		if (ifa == 0)
			senderr(ENETDOWN);
		if (ifa->ifa_addr->sa_family == AF_CCITT)
			break;
	}
	ia = (struct x25_ifaddr *)ifa;
    }
	if (rtx->rtx_lcd == 0) {
		int x25_ifinput();

		lcp = pk_attach((struct socket *)0);
		if (lcp == 0)
			senderr(ENOBUFS);
		rtx->rtx_lcd = lcp;
		rtx->rtx_rt = rt;
		rtx->rtx_ia = ia;
		lcp->lcd_upnext = (caddr_t)rtx;
		lcp->lcd_upper = x25_ifinput;
	}
	switch (rtx->rtx_state) {

	case XRS_CONNECTED:
		lcd->lcd_dg_timer = ia->ia_xc.xc_dg_idletimo;
		/* FALLTHROUGH */
	case XRS_CONNECTING:
		if (sbspace(&lcp->lcd_sb) < 0)
			senderr(ENOBUFS);
		lcp->lcd_send(lcp, m);
		break;

	case XRS_NEWBORN:
		if (dst->sa_family == AF_INET &&
		    ia->xc_if.if_type == IFT_DDN &&
		    rt->rt_gateway->sa_family != AF_CCITT)
			x25_ddnip_to_ccitt(dst, rt->rt_gateway);
		lcp->lcd_flags |= X25_DG_CIRCUIT;
		rtx->rtx_state = XRS_FREE;
		if (rt->rt_gateway->sa_family != AF_CCITT) {
			/*
			 * Need external resolution of dst
			 */
			if ((rt->rt_flags & RTF_XRESOLVE) == 0)
				senderr(ENETUNREACH);
			rtx->rtx_flags |= flags;
			flags = 0;
			rt_missmsg(RTM_RESOLVE, dst,
			    (struct sockaddr *)0, (struct sockaddr *)0,
			    (struct sockaddr *)0, 0, 0);
			rtx->rtx_state = XRS_RESOLVING;
			/* FALLTHROUGH */
	case XRS_RESOLVING:
			if (sbspace(&lcp->lcd_sb) < 0)
				senderr(ENOBUFS);
			sbappendrecord(&lcp->lcd_sb, m);
			break;
		}
		/* FALLTHROUGH */
	case XRS_FREE:
		sbappendrecord(&lcp->lcd_sb, m);
		lcp->lcd_pkcb = &(rtx->rtx_ia->ia_pkcb);
		pk_connect(lcp, (struct mbuf *)0,
				(struct sockaddr_x25 *)rt->rt_gateway);
		break;
		/* FALLTHROUGH */
	default:
		/*
		 * We count on the timer routine to close idle
		 * connections, if there are not enough circuits to go
		 * around.
		 *
		 * So throw away data for now.
		 * After we get it all working, we'll rewrite to handle
		 * actively closing connections (other than by timers),
		 * when circuits get tight.
		 *
		 * In the DDN case, the imp itself closes connections
		 * under heavy load.
		 */
		error = ENOBUFS;
	bad:
		if (m)
			m_freem(m);
	}
out:
	if (flags & XRF_RTHELD)
		RTFREE(rt);
	return (error);
}

/*
 * Simpleminded timer routine.
 */
x25_iftimeout(ifp)
struct ifnet *ifp;
{
	register struct pkcb *pkcb = 0;
	register struct ifaddr *ifa;
	register struct pklcd **lcpp, *lcp;
	int s = splimp();

	for (ifa = ifp->if_addrlist; ; ifa = ifa->ifa_next) {
		if (ifa->ifa_addr->sa_family == AF_CCITT)
			break;
	}
	if (ifa)
		pkcb = &((struct x25_ifaddr *)ifa)->ia_pkcb;
	if (pkcb)
		for (lcpp = pkcb->pk_chan + pkcb->pk_maxlcn;
		     --lcpp >= pkcb->pk_chan;)
			if ((lcp = *lcpp) &&
			    lcp->lcd_state == DATA_TRANSFER &&
			    (lcp->lcd_flags & X25_DG_CICRUIT) &&
			    (--(lcp->lcd_dg_timer) <= 0)) {
				register struct rtextension_x25 *rtx;
				pk_disconnect(lcp);
				rtx = (struct rtextension_x25 *)
						lcp->lcp_upnext;
				if (rtx)
					rtx->rtx_state = XRS_DISCONNECTING;
			    }
	splx(s);
}

/*
 * Process a x25 packet as datagram;
 */
x25_ifinput(lcp, m)
struct pklcd *lcp;
struct mbuf *m;
{
	struct rtextension *rtx = (struct rtentry *)lcp->lcd_upnext;
	register struct ifnet *ifp = &rtx->rtx_rt->rt_ifp;
	int s;

	ifp->if_lastchange = time;

	switch (rt_dst(rt)->sa_family) {
#ifdef INET
	case AF_INET:
		schednetisr(NETISR_IP);
		inq = &ipintrq;
		break;

#endif
#ifdef NS
	case AF_NS:
		schednetisr(NETISR_NS);
		inq = &nsintrq;
		break;

#endif
#ifdef	ISO
	case AF_ISO:
		/* XXXX need to find out about tearing off COSNS
		   headers if any */
		schednetisr(NETISR_ISO);
		inq = &clnlintrq;
		break;
#endif
	default:
		m_freem(m);
		ifp->if_noproto++;
		return;
	}
	s = splimp();
	if (IF_QFULL(inq)) {
		IF_DROP(inq);
		m_freem(m);
	} else {
		IF_ENQUEUE(inq, m);
		ifp->if_ibytes += m->m_pkthdr.len;
	}
	splx(s);
}

union imp_addr {
	struct in_addr  ip;
	struct imp {
		u_char		s_net;
		u_char		s_host;
		u_char		s_lh;
		u_char		s_impno;
	}		    imp;
};
static struct sockaddr_x25 blank_x25 = {sizeof blank_x25, AF_CCITT};
/*
 * IP to X25 address routine copyright ACC, used by permission.
 */
x25_ddnip_to_ccitt(src, dst)
struct sockaddr_in *src;
register struct sockaddr_x25 *dst;
{
	union imp_addr imp_addr;
	int             imp_no, imp_port;
	char *x25addr = dst->x25_x25addr;


	imp_addr.ip = src->sin_addr.s_addr;
	*dst = blank_x25;
	if ((imp_addr.imp.s_net & 0x80) == 0x00) {	/* class A */
	    imp_no = imp_addr.imp.s_impno;
	    imp_port = imp_addr.imp.s_host;
	} else if ((imp_addr.imp.s_net & 0xc0) == 0x80) {	/* class B */
	    imp_no = imp_addr.imp.s_impno;
	    imp_port = imp_addr.imp.s_lh;
	} else {		/* class C */
	    imp_no = imp_addr.imp.s_impno / 32;
	    imp_port = imp_addr.imp.s_impno % 32;
	}

	x25addr[0] = 12; /* length */
	/* DNIC is cleared by struct copy above */

	if (imp_port < 64) {	/* Physical:  0000 0 IIIHH00 [SS] *//* s_impno
				 *  -> III, s_host -> HH */
	    x25addr[5] = 0;	/* set flag bit */
	    x25addr[6] = imp_no / 100;
	    x25addr[7] = (imp_no % 100) / 10;
	    x25addr[8] = imp_no % 10;
	    x25addr[9] = imp_port / 10;
	    x25addr[10] = imp_port % 10;
	} else {		/* Logical:   0000 1 RRRRR00 [SS]	 *//* s
				 * _host * 256 + s_impno -> RRRRR */
	    temp = (imp_port << 8) + imp_no;
	    x25addr[5] = 1;
	    x25addr[6] = temp / 10000;
	    x25addr[7] = (temp % 10000) / 1000;
	    x25addr[8] = (temp % 1000) / 100;
	    x25addr[9] = (temp % 100) / 10;
	    x25addr[10] = temp % 10;
	}
}

#ifdef caseof
#undef caseof
#endif
#define caseof(a, b) (b + 8 * a)
#define SA(p) ((struct sockaddr *)(p))

/*
 * This routine gets called when validing new routes or deletions of old
 * ones.
 */
x25_ifrtchange(cmd, rt, dst)
register struct rtentry *rt;
struct sockaddr *dst;
{
	register struct rtextension_x25 *rtx = (struct pklcd *)rt->rt_llinfo;
	register struct sockaddr_x25 *sa =(struct sockaddr_x25 *)rt->rt_gateway;
	register struct pklcd *lcp;
	register struct x25_ifaddr *ia;
	register struct sockaddr *sa2;
	struct mbuf *m, *mold;
	int x25_ifrtfree();

	if (rtx == 0)
		return;
	ia = rtx->rtx_ia;
	lcp = rtx->rtx_lcd;

	switch (caseof(xl->xl_state, cmd)) {

	case caseof(XRS_CONNECTED, RTM_DELETE):
	case caseof(XRS_CONNECTED, RTM_CHANGE):
	case caseof(XRS_CONNECTING, RTM_DELETE):
	case caseof(XRS_CONNECTING, RTM_CHANGE):
		pk_disconnect(lcp);
		lcp->lcd_upper = x25_ifrtfree;
		rt->rt_refcnt++;
		break;

	case caseof(XRS_CONNECTED, RTM_ADD):
	case caseof(XRS_CONNECTING, RTM_ADD):
	case caseof(XRS_RESOLVING, RTM_ADD):
		printf("ifrtchange: impossible transition, should panic\n");
		break;

	case caseof(XRS_RESOLVING, RTM_DELETE):
		sbflush(&(rtx->rtx_lcd->lcd_sb));
		free((caddr_t)rtx->rtx_lcd, M_PCB);
		rtx->rtx_lcd = 0;
		break;

	case caseof(XRS_RESOLVING, RTM_CHANGE):
		lcp->lcd_pkcb = &(ia->ia_pkcb);
		pk_connect(lcp, (struct mbuf *)0, sa);
		break;
	}
	if (rt->rt_ifp->if_type == IFT_DDN)
		return;
	sa2 = SA(rt->rt_key);
	if (cmd == RTM_CHANGE) {
		if (sa->sa_family == AF_CCITT) {
			sa->x25_opts.op_speed = sa2->sa_family;
			(void) rtrequest(RTM_DELETE, SA(sa), sa2,
			       SA(0), RTF_HOST, (struct rtentry **)0);
		}
		sa = (struct sockaddr_x25 *)dst;
		cmd = RTM_ADD;
	}
	if (sa->sa_family == AF_CCITT) {
		sa->x25_opts.op_speed = sa2->sa_family;
		(void) rtrequest(cmd, SA(sa), sa2, SA(0), RTF_HOST,
							(struct rtentry **)0);
		sa->x25_opts.op_speed = 0;
	}
}

static struct sockaddr sin = {sizeof(sin), AF_INET};
/*
 * This is a utility routine to be called by x25 devices when a
 * call request is honored with the intent of starting datagram forwarding.
 */
x25_dg_rtinit(dst, ia, af)
struct sockaddr_x25 *dst;
register struct x25com *ia;
{
	struct sockaddr *sa = 0;
	if (ia->xc_if.if_type == IFT_DDN && af == AF_INET) {
	/*
	 * Inverse X25 to IPP mapping copyright and courtesy ACC.
	 */
		int             imp_no, imp_port, temp;
		union imp_addr imp_addr;
	    {
		/*
		 * First determine our IP addr for network
		 */
		register struct in_ifaddr *ia;
		extern struct in_ifaddr *in_ifaddr;
		for (ia = in_ifaddr; ia; ia = ia->ia_next)
			if (ia->ia_ifp == &ia->xc_if) {
				imp_addr.ip = ia->ia_addr.sin_addr;
				break;
			}
	    }
	    {

		register char *x25addr = dst->x25_addr;

		switch (x25addr[5] & 0x0f) {
		  case 0:	/* Physical:  0000 0 IIIHH00 [SS]	 */
		    imp_no =
			((int) (x25addr[6] & 0x0f) * 100) +
			((int) (x25addr[7] & 0x0f) * 10) +
			((int) (x25addr[8] & 0x0f));


		    imp_port =
			((int) (x25addr[9] & 0x0f) * 10) +
			((int) (x25addr[10] & 0x0f));
		    break;
		  case 1:	/* Logical:   0000 1 RRRRR00 [SS]	 */
		    temp = ((int) (x25addr[6] & 0x0f) * 10000)
			+ ((int) (x25addr[7] & 0x0f) * 1000)
			+ ((int) (x25addr[8] & 0x0f) * 100)
			+ ((int) (x25addr[9] & 0x0f) * 10)
			+ ((int) (x25addr[10] & 0x0f));

		    imp_port = temp >> 8;
		    imp_no = temp & 0xff;
		    break;
		  default:
		    return (0L);
		}
		imp_addr.ip.s_addr = my_addr;
		if ((imp_addr.imp.s_net & 0x80) == 0x00) {
		/* class A */
		    imp_addr.imp.s_host = imp_port;
		    imp_addr.imp.s_impno = imp_no;
		    imp_addr.imp.s_lh = 0;
		} else if ((imp_addr.imp.s_net & 0xc0) == 0x80) {
		/* class B */
		    imp_addr.imp.s_lh = imp_port;
		    imp_addr.imp.s_impno = imp_no;
		} else {
		/* class C */
		    imp_addr.imp.s_impno = (imp_no << 5) + imp_port;
		}
	    }
		sin.sin_addr = imp_addr.ip;
		sa = (struct sockaddr *)&sin;
	} else {
		/*
		 * This uses the X25 routing table to do inverse
		 * lookup of x25 address to sockaddr.
		 */
		dst->x25_opts.op_speed = af;
		if (rt = rtalloc1(dst, 0)) {
			sa = rt->rt_gateway;
			rt->rt_refcnt--;
		}
		dst->x25_opts.op_speed = 0;
	}
	/* 
	 * Call to rtalloc1 will create rtentry for reverse path
	 * to callee by virtue of cloning magic and will allocate
	 * space for local control block.
	 */
	if (sa && rt = rtalloc1(sa, 1))
		rt->rt_refcnt--;
}

struct radix_tree_head *x25_rnhead;

pk_init()
{
	/*
	 * warning, sizeof (struct sockaddr_x25) > 32,
	 * but contains no data of interest beyond 32
	 */
	rn_inithead(&x25_rnhead, 16, AF_CCITT);
}
Commit	Line	Data
16e7cbfd	1	/*
94b7ce3b	2	* Copyright (c) 1990 The Regents of the University of California.
16e7cbfd KS	3	* All rights reserved.
16e7cbfd KS	4	*
94b7ce3b	5	* %sccs.include.redist.c%
16e7cbfd	6	*
b84e7ca8	7	* @(#)if_x25subr.c 7.5 (Berkeley) %G%
16e7cbfd KS	8	*/
	9
	10	#include "param.h"
	11	#include "systm.h"
	12	#include "malloc.h"
	13	#include "mbuf.h"
	14	#include "protosw.h"
	15	#include "socket.h"
	16	#include "ioctl.h"
	17	#include "errno.h"
	18	#include "syslog.h"
	19
039be508 KS	20	#include "../net/if.h"
	21	#include "../net/netisr.h"
	22	#include "../net/route.h"
	23
	24	#include "x25.h"
	25	#include "x25error.h"
	26	#include "pk_var.h"
16e7cbfd	27
16e7cbfd KS	28	#include "machine/mtpr.h"
	29
	30	#ifdef INET
	31	#include "../netinet/in.h"
	32	#include "../netinet/in_var.h"
	33	#endif
	34
	35	#ifdef NS
	36	#include "../netns/ns.h"
	37	#include "../netns/ns_if.h"
	38	#endif
	39
	40	#ifdef ISO
	41	#include "../netiso/argo_debug.h"
	42	#include "../netiso/iso.h"
	43	#include "../netiso/iso_var.h"
	44	#endif
	45
	46	extern struct ifnet loif;
	47
	48	#define senderr(x) {error = x; goto bad;}
	49	/*
	50	* X.25 output routine.
	51	*/
039be508 KS	52	x25_ifoutput(ifp, m0, dst, rt)
039be508 KS	53	struct ifnet *ifp;
16e7cbfd KS	54	struct mbuf *m0;
	55	struct sockaddr *dst;
	56	register struct rtentry *rt;
	57	{
039be508	58	register struct mbuf *m;
ffababe5 KS	59	register struct rtextension_x25 *rtx;
ffababe5 KS	60	register struct pq *pq;
039be508 KS	61	struct pklcd *lcp;
039be508 KS	62	struct x25_ifaddr *ia;
16e7cbfd KS	63	struct mbuf *prev;
	64	int s, error = 0, flags = 0;
	65	union imp_addr imp_addr;
	66	int flags = 0;
	67
039be508	68	if ((ifp->if_flags & IFF_UP) == 0)
16e7cbfd KS	69	return (ENETDOWN);
	70	if (rt == 0 \|\|
	71	((rt->rt_flags & RTF_GATEWAY) && (dst = rt->rt_gateway))) {
	72	if ((rt = rtalloc1(dst, 1)) == 0)
	73	return (EHOSTUNREACH);
	74	rt->rt_refcnt++;
039be508	75	flags = XRF_RTHELD;
16e7cbfd KS	76	}
	77	/*
	78	* Sanity checks.
	79	*/
039be508	80	if ((rt->rt_ifp != ifp) \|\|
16e7cbfd	81	(rt->rt_flags & (RTF_CLONING \| RTF_GATEWAY)) \|\|
039be508	82	((rtx = (struct rtextension_x25 *)rt->rt_llinfo) == 0)) {
16e7cbfd KS	83	printf("Inconsistent call to x25_output, should panic\n");
	84	senderr(ENETUNREACH);
	85	}
039be508 KS	86	{
	87	register struct ifaddr *ifa;
	88	for (ifa = ifp->if_addrlist; ; ifa = ifa->ifa_next) {
	89	if (ifa == 0)
	90	senderr(ENETDOWN);
	91	if (ifa->ifa_addr->sa_family == AF_CCITT)
	92	break;
	93	}
	94	ia = (struct x25_ifaddr *)ifa;
	95	}
	96	if (rtx->rtx_lcd == 0) {
	97	int x25_ifinput();
	98
ffababe5 KS	99	lcp = pk_attach((struct socket *)0);
ffababe5 KS	100	if (lcp == 0)
039be508	101	senderr(ENOBUFS);
ffababe5	102	rtx->rtx_lcd = lcp;
039be508 KS	103	rtx->rtx_rt = rt;
039be508 KS	104	rtx->rtx_ia = ia;
b84e7ca8 KS	105	lcp->lcd_upnext = (caddr_t)rtx;
b84e7ca8 KS	106	lcp->lcd_upper = x25_ifinput;
039be508	107	}
039be508	108	switch (rtx->rtx_state) {
16e7cbfd	109
039be508 KS	110	case XRS_CONNECTED:
039be508 KS	111	lcd->lcd_dg_timer = ia->ia_xc.xc_dg_idletimo;
16e7cbfd	112	/* FALLTHROUGH */
039be508	113	case XRS_CONNECTING:
b84e7ca8	114	if (sbspace(&lcp->lcd_sb) < 0)
16e7cbfd	115	senderr(ENOBUFS);
b84e7ca8	116	lcp->lcd_send(lcp, m);
16e7cbfd KS	117	break;
16e7cbfd KS	118
039be508	119	case XRS_NEWBORN:
16e7cbfd	120	if (dst->sa_family == AF_INET &&
039be508	121	ia->xc_if.if_type == IFT_DDN &&
16e7cbfd KS	122	rt->rt_gateway->sa_family != AF_CCITT)
16e7cbfd KS	123	x25_ddnip_to_ccitt(dst, rt->rt_gateway);
039be508 KS	124	lcp->lcd_flags \|= X25_DG_CIRCUIT;
039be508 KS	125	rtx->rtx_state = XRS_FREE;
16e7cbfd KS	126	if (rt->rt_gateway->sa_family != AF_CCITT) {
	127	/*
	128	* Need external resolution of dst
	129	*/
	130	if ((rt->rt_flags & RTF_XRESOLVE) == 0)
	131	senderr(ENETUNREACH);
039be508	132	rtx->rtx_flags \|= flags;
16e7cbfd KS	133	flags = 0;
	134	rt_missmsg(RTM_RESOLVE, dst,
	135	(struct sockaddr )0, (struct sockaddr )0,
	136	(struct sockaddr *)0, 0, 0);
039be508	137	rtx->rtx_state = XRS_RESOLVING;
16e7cbfd	138	/* FALLTHROUGH */
039be508	139	case XRS_RESOLVING:
b84e7ca8	140	if (sbspace(&lcp->lcd_sb) < 0)
16e7cbfd	141	senderr(ENOBUFS);
b84e7ca8	142	sbappendrecord(&lcp->lcd_sb, m);
16e7cbfd KS	143	break;
	144	}
	145	/* FALLTHROUGH */
039be508	146	case XRS_FREE:
b84e7ca8	147	sbappendrecord(&lcp->lcd_sb, m);
039be508	148	lcp->lcd_pkcb = &(rtx->rtx_ia->ia_pkcb);
ffababe5 KS	149	pk_connect(lcp, (struct mbuf *)0,
ffababe5 KS	150	(struct sockaddr_x25 *)rt->rt_gateway);
039be508	151	break;
16e7cbfd KS	152	/* FALLTHROUGH */
	153	default:
	154	/*
	155	* We count on the timer routine to close idle
	156	* connections, if there are not enough circuits to go
	157	* around.
	158	*
	159	* So throw away data for now.
	160	* After we get it all working, we'll rewrite to handle
	161	* actively closing connections (other than by timers),
	162	* when circuits get tight.
	163	*
	164	* In the DDN case, the imp itself closes connections
	165	* under heavy load.
	166	*/
	167	error = ENOBUFS;
	168	bad:
	169	if (m)
	170	m_freem(m);
	171	}
	172	out:
039be508	173	if (flags & XRF_RTHELD)
16e7cbfd KS	174	RTFREE(rt);
	175	return (error);
	176	}
	177
	178	/*
039be508	179	* Simpleminded timer routine.
16e7cbfd	180	*/
039be508 KS	181	x25_iftimeout(ifp)
039be508 KS	182	struct ifnet *ifp;
16e7cbfd	183	{
039be508 KS	184	register struct pkcb *pkcb = 0;
	185	register struct ifaddr *ifa;
	186	register struct pklcd *lcpp, lcp;
16e7cbfd KS	187	int s = splimp();
16e7cbfd KS	188
039be508 KS	189	for (ifa = ifp->if_addrlist; ; ifa = ifa->ifa_next) {
	190	if (ifa->ifa_addr->sa_family == AF_CCITT)
	191	break;
	192	}
	193	if (ifa)
	194	pkcb = &((struct x25_ifaddr *)ifa)->ia_pkcb;
	195	if (pkcb)
	196	for (lcpp = pkcb->pk_chan + pkcb->pk_maxlcn;
	197	--lcpp >= pkcb->pk_chan;)
	198	if ((lcp = *lcpp) &&
	199	lcp->lcd_state == DATA_TRANSFER &&
	200	(lcp->lcd_flags & X25_DG_CICRUIT) &&
	201	(--(lcp->lcd_dg_timer) <= 0)) {
	202	register struct rtextension_x25 *rtx;
	203	pk_disconnect(lcp);
	204	rtx = (struct rtextension_x25 *)
b84e7ca8	205	lcp->lcp_upnext;
039be508 KS	206	if (rtx)
	207	rtx->rtx_state = XRS_DISCONNECTING;
	208	}
16e7cbfd KS	209	splx(s);
	210	}
	211
	212	/*
	213	* Process a x25 packet as datagram;
	214	*/
b84e7ca8 KS	215	x25_ifinput(lcp, m)
b84e7ca8 KS	216	struct pklcd *lcp;
16e7cbfd KS	217	struct mbuf *m;
16e7cbfd KS	218	{
b84e7ca8 KS	219	struct rtextension rtx = (struct rtentry )lcp->lcd_upnext;
b84e7ca8 KS	220	register struct ifnet *ifp = &rtx->rtx_rt->rt_ifp;
16e7cbfd KS	221	int s;
	222
	223	ifp->if_lastchange = time;
	224
	225	switch (rt_dst(rt)->sa_family) {
	226	#ifdef INET
	227	case AF_INET:
	228	schednetisr(NETISR_IP);
	229	inq = &ipintrq;
	230	break;
	231
	232	#endif
	233	#ifdef NS
	234	case AF_NS:
	235	schednetisr(NETISR_NS);
	236	inq = &nsintrq;
	237	break;
	238
	239	#endif
	240	#ifdef ISO
	241	case AF_ISO:
	242	/* XXXX need to find out about tearing off COSNS
	243	headers if any */
	244	schednetisr(NETISR_ISO);
	245	inq = &clnlintrq;
	246	break;
	247	#endif
	248	default:
	249	m_freem(m);
	250	ifp->if_noproto++;
	251	return;
	252	}
	253	s = splimp();
	254	if (IF_QFULL(inq)) {
	255	IF_DROP(inq);
	256	m_freem(m);
	257	} else {
	258	IF_ENQUEUE(inq, m);
	259	ifp->if_ibytes += m->m_pkthdr.len;
	260	}
	261	splx(s);
	262	}
	263
	264	union imp_addr {
	265	struct in_addr ip;
	266	struct imp {
	267	u_char s_net;
	268	u_char s_host;
	269	u_char s_lh;
	270	u_char s_impno;
	271	} imp;
	272	};
	273	static struct sockaddr_x25 blank_x25 = {sizeof blank_x25, AF_CCITT};
	274	/*
	275	* IP to X25 address routine copyright ACC, used by permission.
	276	*/
	277	x25_ddnip_to_ccitt(src, dst)
	278	struct sockaddr_in *src;
	279	register struct sockaddr_x25 *dst;
	280	{
	281	union imp_addr imp_addr;
	282	int imp_no, imp_port;
	283	char *x25addr = dst->x25_x25addr;
	284
285
286	imp_addr.ip = src->sin_addr.s_addr;
287	*dst = blank_x25;
288	if ((imp_addr.imp.s_net & 0x80) == 0x00) { /* class A */
289	imp_no = imp_addr.imp.s_impno;
290	imp_port = imp_addr.imp.s_host;
291	} else if ((imp_addr.imp.s_net & 0xc0) == 0x80) { /* class B */
292	imp_no = imp_addr.imp.s_impno;
293	imp_port = imp_addr.imp.s_lh;
294	} else { /* class C */
295	imp_no = imp_addr.imp.s_impno / 32;
296	imp_port = imp_addr.imp.s_impno % 32;
297	}
298
299	x25addr[0] = 12; /* length */
300	/* DNIC is cleared by struct copy above */
301
302	if (imp_port < 64) { /* Physical: 0000 0 IIIHH00 [SS] // s_impno
303	* -> III, s_host -> HH */
304	x25addr[5] = 0; /* set flag bit */
305	x25addr[6] = imp_no / 100;
306	x25addr[7] = (imp_no % 100) / 10;
307	x25addr[8] = imp_no % 10;
308	x25addr[9] = imp_port / 10;
309	x25addr[10] = imp_port % 10;
310	} else { /* Logical: 0000 1 RRRRR00 [SS] // s
311	* _host * 256 + s_impno -> RRRRR */
312	temp = (imp_port << 8) + imp_no;
313	x25addr[5] = 1;
314	x25addr[6] = temp / 10000;
315	x25addr[7] = (temp % 10000) / 1000;
316	x25addr[8] = (temp % 1000) / 100;
317	x25addr[9] = (temp % 100) / 10;
318	x25addr[10] = temp % 10;
319	}
320	}
321
322	#ifdef caseof
323	#undef caseof
324	#endif
325	#define caseof(a, b) (b + 8 * a)
326	#define SA(p) ((struct sockaddr *)(p))
327
328	/*
329	* This routine gets called when validing new routes or deletions of old
330	* ones.
331	*/
332	x25_ifrtchange(cmd, rt, dst)
333	register struct rtentry *rt;
334	struct sockaddr *dst;
335	{
039be508	336	register struct rtextension_x25 rtx = (struct pklcd )rt->rt_llinfo;
16e7cbfd	337	register struct sockaddr_x25 sa =(struct sockaddr_x25 )rt->rt_gateway;
039be508 KS	338	register struct pklcd *lcp;
039be508 KS	339	register struct x25_ifaddr *ia;
16e7cbfd KS	340	register struct sockaddr *sa2;
16e7cbfd KS	341	struct mbuf m, mold;
b84e7ca8	342	int x25_ifrtfree();
16e7cbfd	343
039be508	344	if (rtx == 0)
16e7cbfd	345	return;
039be508 KS	346	ia = rtx->rtx_ia;
	347	lcp = rtx->rtx_lcd;
	348
16e7cbfd	349	switch (caseof(xl->xl_state, cmd)) {
039be508 KS	350
	351	case caseof(XRS_CONNECTED, RTM_DELETE):
	352	case caseof(XRS_CONNECTED, RTM_CHANGE):
	353	case caseof(XRS_CONNECTING, RTM_DELETE):
	354	case caseof(XRS_CONNECTING, RTM_CHANGE):
	355	pk_disconnect(lcp);
b84e7ca8	356	lcp->lcd_upper = x25_ifrtfree;
039be508	357	rt->rt_refcnt++;
16e7cbfd KS	358	break;
16e7cbfd KS	359
039be508 KS	360	case caseof(XRS_CONNECTED, RTM_ADD):
	361	case caseof(XRS_CONNECTING, RTM_ADD):
	362	case caseof(XRS_RESOLVING, RTM_ADD):
16e7cbfd KS	363	printf("ifrtchange: impossible transition, should panic\n");
	364	break;
	365
039be508	366	case caseof(XRS_RESOLVING, RTM_DELETE):
b84e7ca8 KS	367	sbflush(&(rtx->rtx_lcd->lcd_sb));
b84e7ca8 KS	368	free((caddr_t)rtx->rtx_lcd, M_PCB);
039be508	369	rtx->rtx_lcd = 0;
16e7cbfd KS	370	break;
16e7cbfd KS	371
039be508 KS	372	case caseof(XRS_RESOLVING, RTM_CHANGE):
039be508 KS	373	lcp->lcd_pkcb = &(ia->ia_pkcb);
ffababe5	374	pk_connect(lcp, (struct mbuf *)0, sa);
16e7cbfd KS	375	break;
16e7cbfd KS	376	}
039be508 KS	377	if (rt->rt_ifp->if_type == IFT_DDN)
039be508 KS	378	return;
16e7cbfd KS	379	sa2 = SA(rt->rt_key);
	380	if (cmd == RTM_CHANGE) {
	381	if (sa->sa_family == AF_CCITT) {
b84e7ca8	382	sa->x25_opts.op_speed = sa2->sa_family;
16e7cbfd KS	383	(void) rtrequest(RTM_DELETE, SA(sa), sa2,
	384	SA(0), RTF_HOST, (struct rtentry **)0);
	385	}
	386	sa = (struct sockaddr_x25 *)dst;
	387	cmd = RTM_ADD;
	388	}
	389	if (sa->sa_family == AF_CCITT) {
b84e7ca8	390	sa->x25_opts.op_speed = sa2->sa_family;
16e7cbfd KS	391	(void) rtrequest(cmd, SA(sa), sa2, SA(0), RTF_HOST,
16e7cbfd KS	392	(struct rtentry **)0);
b84e7ca8	393	sa->x25_opts.op_speed = 0;
16e7cbfd KS	394	}
16e7cbfd KS	395	}
b84e7ca8	396
16e7cbfd KS	397	static struct sockaddr sin = {sizeof(sin), AF_INET};
	398	/*
	399	* This is a utility routine to be called by x25 devices when a
	400	* call request is honored with the intent of starting datagram forwarding.
	401	*/
039be508	402	x25_dg_rtinit(dst, ia, af)
16e7cbfd	403	struct sockaddr_x25 *dst;
039be508	404	register struct x25com *ia;
16e7cbfd KS	405	{
16e7cbfd KS	406	struct sockaddr *sa = 0;
039be508	407	if (ia->xc_if.if_type == IFT_DDN && af == AF_INET) {
16e7cbfd KS	408	/*
	409	* Inverse X25 to IPP mapping copyright and courtesy ACC.
	410	*/
	411	int imp_no, imp_port, temp;
	412	union imp_addr imp_addr;
	413	{
	414	/*
	415	* First determine our IP addr for network
	416	*/
	417	register struct in_ifaddr *ia;
	418	extern struct in_ifaddr *in_ifaddr;
	419	for (ia = in_ifaddr; ia; ia = ia->ia_next)
039be508	420	if (ia->ia_ifp == &ia->xc_if) {
16e7cbfd KS	421	imp_addr.ip = ia->ia_addr.sin_addr;
	422	break;
	423	}
	424	}
	425	{
	426
	427	register char *x25addr = dst->x25_addr;
	428
	429	switch (x25addr[5] & 0x0f) {
	430	case 0: /* Physical: 0000 0 IIIHH00 [SS] */
	431	imp_no =
	432	((int) (x25addr[6] & 0x0f) * 100) +
	433	((int) (x25addr[7] & 0x0f) * 10) +
	434	((int) (x25addr[8] & 0x0f));
	435
	436
	437	imp_port =
	438	((int) (x25addr[9] & 0x0f) * 10) +
	439	((int) (x25addr[10] & 0x0f));
	440	break;
	441	case 1: /* Logical: 0000 1 RRRRR00 [SS] */
	442	temp = ((int) (x25addr[6] & 0x0f) * 10000)
	443	+ ((int) (x25addr[7] & 0x0f) * 1000)
	444	+ ((int) (x25addr[8] & 0x0f) * 100)
	445	+ ((int) (x25addr[9] & 0x0f) * 10)
	446	+ ((int) (x25addr[10] & 0x0f));
	447
	448	imp_port = temp >> 8;
	449	imp_no = temp & 0xff;
	450	break;
	451	default:
	452	return (0L);
	453	}
	454	imp_addr.ip.s_addr = my_addr;
	455	if ((imp_addr.imp.s_net & 0x80) == 0x00) {
	456	/* class A */
	457	imp_addr.imp.s_host = imp_port;
	458	imp_addr.imp.s_impno = imp_no;
	459	imp_addr.imp.s_lh = 0;
	460	} else if ((imp_addr.imp.s_net & 0xc0) == 0x80) {
	461	/* class B */
	462	imp_addr.imp.s_lh = imp_port;
	463	imp_addr.imp.s_impno = imp_no;
	464	} else {
	465	/* class C */
	466	imp_addr.imp.s_impno = (imp_no << 5) + imp_port;
	467	}
	468	}
	469	sin.sin_addr = imp_addr.ip;
	470	sa = (struct sockaddr *)&sin;
	471	} else {
	472	/*
	473	* This uses the X25 routing table to do inverse
	474	* lookup of x25 address to sockaddr.
	475	*/
b84e7ca8	476	dst->x25_opts.op_speed = af;
16e7cbfd KS	477	if (rt = rtalloc1(dst, 0)) {
	478	sa = rt->rt_gateway;
	479	rt->rt_refcnt--;
	480	}
b84e7ca8	481	dst->x25_opts.op_speed = 0;
16e7cbfd KS	482	}
	483	/*
	484	* Call to rtalloc1 will create rtentry for reverse path
	485	* to callee by virtue of cloning magic and will allocate
	486	* space for local control block.
	487	*/
	488	if (sa && rt = rtalloc1(sa, 1))
	489	rt->rt_refcnt--;
	490	}
b84e7ca8 KS	491
	492	struct radix_tree_head *x25_rnhead;
	493
	494	pk_init()
	495	{
	496	/*
	497	* warning, sizeof (struct sockaddr_x25) > 32,
	498	* but contains no data of interest beyond 32
	499	*/
	500	rn_inithead(&x25_rnhead, 16, AF_CCITT);
	501	}