[unix-history] / usr / src / sbin / routed / startup.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)startup.c	5.3 (Berkeley) %G%";
#endif not lint

/*
 * Routing Table Management Daemon
 */
#include "defs.h"
#include <sys/ioctl.h>
#include <net/if.h>
#include <nlist.h>
#include <syslog.h>

struct	interface *ifnet;
int	lookforinterfaces = 1;
int	performnlist = 1;
int	externalinterfaces = 0;		/* # of remote and local interfaces */

/*
 * Find the network interfaces which have configured themselves.
 * If the interface is present but not yet up (for example an
 * ARPANET IMP), set the lookforinterfaces flag so we'll
 * come back later and look again.
 */
ifinit()
{
	struct interface ifs, *ifp;
	int s, n;
	char buf[BUFSIZ];
        struct ifconf ifc;
        struct ifreq ifreq, *ifr;
        struct sockaddr_in *sin;
	u_long i;

	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
		syslog(LOG_ERR, "socket: %m");
		exit(1);
	}
        ifc.ifc_len = sizeof (buf);
        ifc.ifc_buf = buf;
        if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
                syslog(LOG_ERR, "ioctl (get interface configuration)");
		close(s);
                return (0);
        }
        ifr = ifc.ifc_req;
	lookforinterfaces = 0;
        for (n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++) {
		bzero((char *)&ifs, sizeof(ifs));
		ifs.int_addr = ifr->ifr_addr;
		ifreq = *ifr;
                if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
                        syslog(LOG_ERR, "ioctl (get interface flags)");
                        continue;
                }
		ifs.int_flags = ifreq.ifr_flags | IFF_INTERFACE;
		/* no one cares about software loopback interfaces */
		if (ifs.int_flags & IFF_LOOPBACK)
			continue;
		if ((ifs.int_flags & IFF_UP) == 0 ||
		    ifr->ifr_addr.sa_family == AF_UNSPEC) {
			lookforinterfaces = 1;
			continue;
		}
		/* already known to us? */
		if (if_ifwithaddr(&ifs.int_addr))
			continue;
		/* argh, this'll have to change sometime */
		if (ifs.int_addr.sa_family != AF_INET)
			continue;
                if (ifs.int_flags & IFF_POINTOPOINT) {
                        if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) {
                                syslog(LOG_ERR, "ioctl (get dstaddr)");
                                continue;
			}
			ifs.int_dstaddr = ifreq.ifr_dstaddr;
		}
                if (ifs.int_flags & IFF_BROADCAST) {
                        if (ioctl(s, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
                                syslog(LOG_ERR, "ioctl (get broadaddr)");
                                continue;
                        }
			ifs.int_broadaddr = ifreq.ifr_broadaddr;
		}
		if (ioctl(s, SIOCGIFMETRIC, (char *)&ifreq) < 0)
			syslog(LOG_ERR, "ioctl (get metric)");
		else
			ifs.int_metric = ifreq.ifr_metric;
		if (ioctl(s, SIOCGIFNETMASK, (char *)&ifreq) < 0) {
			syslog(LOG_ERR, "ioctl (get netmask)");
			continue;
		}
		sin = (struct sockaddr_in *)&ifreq.ifr_addr;
		ifs.int_subnetmask = ntohl(sin->sin_addr.s_addr);
		sin = (struct sockaddr_in *)&ifs.int_addr;
		i = ntohl(sin->sin_addr.s_addr);
		if (IN_CLASSA(i))
			ifs.int_netmask = IN_CLASSA_NET;
		else if (IN_CLASSB(i))
			ifs.int_netmask = IN_CLASSB_NET;
		else
			ifs.int_netmask = IN_CLASSC_NET;
		ifs.int_net = i & ifs.int_netmask;
		ifs.int_subnet = i & ifs.int_subnetmask;
		ifp = (struct interface *)malloc(sizeof (struct interface));
		if (ifp == 0) {
			printf("routed: out of memory\n");
			break;
		}
		*ifp = ifs;
		/*
		 * Count the # of directly connected networks
		 * and point to point links which aren't looped
		 * back to ourself.  This is used below to
		 * decide if we should be a routing ``supplier''.
		 */
		if ((ifs.int_flags & IFF_POINTOPOINT) == 0 ||
		    if_ifwithaddr(&ifs.int_dstaddr) == 0)
			externalinterfaces++;
		/*
		 * If we have a point-to-point link, we want to act
		 * as a supplier even if it's our only interface,
		 * as that's the only way our peer on the other end
		 * can tell that the link is up.
		 */
		if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
			supplier = 1;
		ifp->int_name = malloc(strlen(ifr->ifr_name) + 1);
		if (ifp->int_name == 0) {
			fprintf(stderr, "routed: ifinit: out of memory\n");
			goto bad;		/* ??? */
		}
		strcpy(ifp->int_name, ifr->ifr_name);
		ifp->int_next = ifnet;
		ifnet = ifp;
		traceinit(ifp);
		addrouteforif(ifp);
	}
	if (externalinterfaces > 1 && supplier < 0)
		supplier = 1;
	close(s);
	return;
bad:
	sleep(60);
	close(kmem), close(s);
	execv("/etc/routed", argv0);
	_exit(0177);
}

addrouteforif(ifp)
	struct interface *ifp;
{
	struct sockaddr_in net;
	struct sockaddr *dst;
	int state, metric;
	struct rt_entry *rt;

	if (ifp->int_flags & IFF_POINTOPOINT)
		dst = &ifp->int_dstaddr;
	else {
		bzero((char *)&net, sizeof (net));
		net.sin_family = AF_INET;
		net.sin_addr = inet_makeaddr(ifp->int_subnet, INADDR_ANY);
		dst = (struct sockaddr *)&net;
	}
	rt = rtfind(dst);
	if (rt && (rt->rt_state & RTS_INTERFACE))
		return;
	if (rt)
		rtdelete(rt);
	if (ifp->int_transitions++ > 0)
		syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
	rtadd(dst, &ifp->int_addr, ifp->int_metric,
		ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
}

/*
 * As a concession to the ARPANET we read a list of gateways
 * from /etc/gateways and add them to our tables.  This file
 * exists at each ARPANET gateway and indicates a set of ``remote''
 * gateways (i.e. a gateway which we can't immediately determine
 * if it's present or not as we can do for those directly connected
 * at the hardware level).  If a gateway is marked ``passive''
 * in the file, then we assume it doesn't have a routing process
 * of our design and simply assume it's always present.  Those
 * not marked passive are treated as if they were directly
 * connected -- they're added into the interface list so we'll
 * send them routing updates.
 */
gwkludge()
{
	struct sockaddr_in dst, gate;
	FILE *fp;
	char *type, *dname, *gname, *qual, buf[BUFSIZ];
	struct interface *ifp;
	int metric;
	struct rt_entry route;

	fp = fopen("/etc/gateways", "r");
	if (fp == NULL)
		return;
	qual = buf;
	dname = buf + 64;
	gname = buf + ((BUFSIZ - 64) / 3);
	type = buf + (((BUFSIZ - 64) * 2) / 3);
	bzero((char *)&dst, sizeof (dst));
	bzero((char *)&gate, sizeof (gate));
	bzero((char *)&route, sizeof(route));
	/* format: {net | host} XX gateway XX metric DD [passive]\n */
#define	readentry(fp) \
	fscanf((fp), "%s %s gateway %s metric %d %s\n", \
		type, dname, gname, &metric, qual)
	for (;;) {
		if (readentry(fp) == EOF)
			break;
		if (!getnetorhostname(type, dname, &dst))
			continue;
		if (!gethostnameornumber(gname, &gate))
			continue;
		if (strcmp(qual, "passive") == 0) {
			/*
			 * Passive entries aren't placed in our tables,
			 * only the kernel's, so we don't copy all of the
			 * external routing information within a net.
			 * Internal machines should use the default
			 * route to a suitable gateway (like us).
			 */
			route.rt_dst = *(struct sockaddr *) &dst;
			route.rt_router = *(struct sockaddr *) &gate;
			route.rt_flags = RTF_UP;
			if (strcmp(type, "host") == 0)
				route.rt_flags |= RTF_HOST;
			if (metric)
				route.rt_flags |= RTF_GATEWAY;
			(void) ioctl(s, SIOCADDRT, (char *)&route.rt_rt);
			continue;
		}
		/* assume no duplicate entries */
		externalinterfaces++;
		ifp = (struct interface *)malloc(sizeof (*ifp));
		bzero((char *)ifp, sizeof (*ifp));
		ifp->int_flags = IFF_REMOTE;
		/* can't identify broadcast capability */
		ifp->int_net = inet_netof(dst.sin_addr);
		if (strcmp(type, "host") == 0) {
			ifp->int_flags |= IFF_POINTOPOINT;
			ifp->int_dstaddr = *((struct sockaddr *)&dst);
		}
		ifp->int_addr = *((struct sockaddr *)&gate);
		ifp->int_metric = metric;
		ifp->int_next = ifnet;
		ifnet = ifp;
		addrouteforif(ifp);
	}
	fclose(fp);
}

getnetorhostname(type, name, sin)
	char *type, *name;
	struct sockaddr_in *sin;
{

	if (strcmp(type, "net") == 0) {
		struct netent *np = getnetbyname(name);
		int n;

		if (np == 0)
			n = inet_network(name);
		else {
			if (np->n_addrtype != AF_INET)
				return (0);
			n = np->n_net;
			/*
			 * getnetbyname returns right-adjusted value.
			 */
			if (n < 128)
				n <<= IN_CLASSA_NSHIFT;
			else if (n < 65536)
				n <<= IN_CLASSB_NSHIFT;
			else
				n <<= IN_CLASSC_NSHIFT;
		}
		sin->sin_family = AF_INET;
		sin->sin_addr = inet_makeaddr(n, INADDR_ANY);
		return (1);
	}
	if (strcmp(type, "host") == 0) {
		struct hostent *hp = gethostbyname(name);

		if (hp == 0)
			sin->sin_addr.s_addr = inet_addr(name);
		else {
			if (hp->h_addrtype != AF_INET)
				return (0);
			bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
		}
		sin->sin_family = AF_INET;
		return (1);
	}
	return (0);
}

gethostnameornumber(name, sin)
	char *name;
	struct sockaddr_in *sin;
{
	struct hostent *hp;

	hp = gethostbyname(name);
	if (hp) {
		bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
		sin->sin_family = hp->h_addrtype;
		return (1);
	}
	sin->sin_addr.s_addr = inet_addr(name);
	sin->sin_family = AF_INET;
	return (sin->sin_addr.s_addr != -1);
}
Commit	Line	Data
5ff67f98 DF	1	/*
	2	* Copyright (c) 1983 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
85d8a62e	7	#ifndef lint
5d6d4622	8	static char sccsid[] = "@(#)startup.c 5.3 (Berkeley) %G%";
5ff67f98	9	#endif not lint
85d8a62e SL	10
	11	/*
	12	* Routing Table Management Daemon
	13	*/
7fe7fe74	14	#include "defs.h"
ad34083f	15	#include <sys/ioctl.h>
85d8a62e SL	16	#include <net/if.h>
85d8a62e SL	17	#include <nlist.h>
69b7ef61	18	#include <syslog.h>
85d8a62e SL	19
85d8a62e SL	20	struct interface *ifnet;
85d8a62e SL	21	int lookforinterfaces = 1;
	22	int performnlist = 1;
	23	int externalinterfaces = 0; /* # of remote and local interfaces */
85d8a62e SL	24
85d8a62e SL	25	/*
04667a08 MK	26	* Find the network interfaces which have configured themselves.
04667a08 MK	27	* If the interface is present but not yet up (for example an
85d8a62e SL	28	* ARPANET IMP), set the lookforinterfaces flag so we'll
	29	* come back later and look again.
	30	*/
	31	ifinit()
	32	{
04667a08 MK	33	struct interface ifs, *ifp;
	34	int s, n;
	35	char buf[BUFSIZ];
	36	struct ifconf ifc;
	37	struct ifreq ifreq, *ifr;
	38	struct sockaddr_in *sin;
	39	u_long i;
85d8a62e	40
04667a08 MK	41	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
	42	syslog(LOG_ERR, "socket: %m");
	43	exit(1);
85d8a62e	44	}
04667a08 MK	45	ifc.ifc_len = sizeof (buf);
	46	ifc.ifc_buf = buf;
	47	if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
	48	syslog(LOG_ERR, "ioctl (get interface configuration)");
	49	close(s);
	50	return (0);
	51	}
	52	ifr = ifc.ifc_req;
85d8a62e	53	lookforinterfaces = 0;
04667a08 MK	54	for (n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++) {
	55	bzero((char *)&ifs, sizeof(ifs));
	56	ifs.int_addr = ifr->ifr_addr;
	57	ifreq = *ifr;
	58	if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
	59	syslog(LOG_ERR, "ioctl (get interface flags)");
	60	continue;
	61	}
	62	ifs.int_flags = ifreq.ifr_flags \| IFF_INTERFACE;
5d6d4622 MK	63	/* no one cares about software loopback interfaces */
	64	if (ifs.int_flags & IFF_LOOPBACK)
	65	continue;
04667a08 MK	66	if ((ifs.int_flags & IFF_UP) == 0 \|\|
04667a08 MK	67	ifr->ifr_addr.sa_family == AF_UNSPEC) {
85d8a62e SL	68	lookforinterfaces = 1;
	69	continue;
	70	}
	71	/* already known to us? */
04667a08	72	if (if_ifwithaddr(&ifs.int_addr))
85d8a62e SL	73	continue;
85d8a62e SL	74	/* argh, this'll have to change sometime */
04667a08 MK	75	if (ifs.int_addr.sa_family != AF_INET)
	76	continue;
	77	if (ifs.int_flags & IFF_POINTOPOINT) {
	78	if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) {
	79	syslog(LOG_ERR, "ioctl (get dstaddr)");
	80	continue;
	81	}
	82	ifs.int_dstaddr = ifreq.ifr_dstaddr;
	83	}
	84	if (ifs.int_flags & IFF_BROADCAST) {
	85	if (ioctl(s, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
	86	syslog(LOG_ERR, "ioctl (get broadaddr)");
	87	continue;
	88	}
	89	ifs.int_broadaddr = ifreq.ifr_broadaddr;
	90	}
5d6d4622 MK	91	if (ioctl(s, SIOCGIFMETRIC, (char *)&ifreq) < 0)
	92	syslog(LOG_ERR, "ioctl (get metric)");
	93	else
	94	ifs.int_metric = ifreq.ifr_metric;
04667a08 MK	95	if (ioctl(s, SIOCGIFNETMASK, (char *)&ifreq) < 0) {
04667a08 MK	96	syslog(LOG_ERR, "ioctl (get netmask)");
85d8a62e	97	continue;
04667a08 MK	98	}
	99	sin = (struct sockaddr_in *)&ifreq.ifr_addr;
	100	ifs.int_subnetmask = ntohl(sin->sin_addr.s_addr);
	101	sin = (struct sockaddr_in *)&ifs.int_addr;
	102	i = ntohl(sin->sin_addr.s_addr);
	103	if (IN_CLASSA(i))
	104	ifs.int_netmask = IN_CLASSA_NET;
	105	else if (IN_CLASSB(i))
	106	ifs.int_netmask = IN_CLASSB_NET;
	107	else
	108	ifs.int_netmask = IN_CLASSC_NET;
	109	ifs.int_net = i & ifs.int_netmask;
	110	ifs.int_subnet = i & ifs.int_subnetmask;
85d8a62e SL	111	ifp = (struct interface *)malloc(sizeof (struct interface));
	112	if (ifp == 0) {
	113	printf("routed: out of memory\n");
	114	break;
	115	}
04667a08	116	*ifp = ifs;
85d8a62e SL	117	/*
	118	* Count the # of directly connected networks
	119	* and point to point links which aren't looped
	120	* back to ourself. This is used below to
	121	* decide if we should be a routing ``supplier''.
	122	*/
04667a08 MK	123	if ((ifs.int_flags & IFF_POINTOPOINT) == 0 \|\|
04667a08 MK	124	if_ifwithaddr(&ifs.int_dstaddr) == 0)
85d8a62e	125	externalinterfaces++;
4ff053a6 MK	126	/*
	127	* If we have a point-to-point link, we want to act
	128	* as a supplier even if it's our only interface,
	129	* as that's the only way our peer on the other end
	130	* can tell that the link is up.
	131	*/
	132	if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
	133	supplier = 1;
04667a08	134	ifp->int_name = malloc(strlen(ifr->ifr_name) + 1);
85d8a62e SL	135	if (ifp->int_name == 0) {
	136	fprintf(stderr, "routed: ifinit: out of memory\n");
	137	goto bad; /* ??? */
	138	}
04667a08	139	strcpy(ifp->int_name, ifr->ifr_name);
85d8a62e SL	140	ifp->int_next = ifnet;
	141	ifnet = ifp;
	142	traceinit(ifp);
	143	addrouteforif(ifp);
	144	}
	145	if (externalinterfaces > 1 && supplier < 0)
	146	supplier = 1;
04667a08	147	close(s);
85d8a62e SL	148	return;
	149	bad:
	150	sleep(60);
7fe7fe74	151	close(kmem), close(s);
85d8a62e SL	152	execv("/etc/routed", argv0);
	153	_exit(0177);
	154	}
	155
	156	addrouteforif(ifp)
	157	struct interface *ifp;
	158	{
	159	struct sockaddr_in net;
	160	struct sockaddr *dst;
	161	int state, metric;
	162	struct rt_entry *rt;
	163
	164	if (ifp->int_flags & IFF_POINTOPOINT)
	165	dst = &ifp->int_dstaddr;
	166	else {
	167	bzero((char *)&net, sizeof (net));
	168	net.sin_family = AF_INET;
04667a08	169	net.sin_addr = inet_makeaddr(ifp->int_subnet, INADDR_ANY);
85d8a62e SL	170	dst = (struct sockaddr *)&net;
85d8a62e SL	171	}
04667a08 MK	172	rt = rtfind(dst);
04667a08 MK	173	if (rt && (rt->rt_state & RTS_INTERFACE))
a7c33470	174	return;
85d8a62e SL	175	if (rt)
85d8a62e SL	176	rtdelete(rt);
04667a08 MK	177	if (ifp->int_transitions++ > 0)
04667a08 MK	178	syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
a7c33470 MK	179	rtadd(dst, &ifp->int_addr, ifp->int_metric,
a7c33470 MK	180	ifp->int_flags & (IFF_INTERFACE\|IFF_PASSIVE\|IFF_REMOTE));
85d8a62e SL	181	}
	182
	183	/*
	184	* As a concession to the ARPANET we read a list of gateways
	185	* from /etc/gateways and add them to our tables. This file
	186	* exists at each ARPANET gateway and indicates a set of ``remote''
	187	* gateways (i.e. a gateway which we can't immediately determine
	188	* if it's present or not as we can do for those directly connected
	189	* at the hardware level). If a gateway is marked ``passive''
	190	* in the file, then we assume it doesn't have a routing process
	191	* of our design and simply assume it's always present. Those
	192	* not marked passive are treated as if they were directly
	193	* connected -- they're added into the interface list so we'll
	194	* send them routing updates.
	195	*/
	196	gwkludge()
	197	{
	198	struct sockaddr_in dst, gate;
	199	FILE *fp;
	200	char type, dname, gname, qual, buf[BUFSIZ];
	201	struct interface *ifp;
	202	int metric;
ad34083f	203	struct rt_entry route;
85d8a62e SL	204
	205	fp = fopen("/etc/gateways", "r");
	206	if (fp == NULL)
	207	return;
	208	qual = buf;
	209	dname = buf + 64;
	210	gname = buf + ((BUFSIZ - 64) / 3);
	211	type = buf + (((BUFSIZ - 64) * 2) / 3);
	212	bzero((char *)&dst, sizeof (dst));
	213	bzero((char *)&gate, sizeof (gate));
ad34083f	214	bzero((char *)&route, sizeof(route));
85d8a62e SL	215	/* format: {net \| host} XX gateway XX metric DD [passive]\n */
	216	#define readentry(fp) \
	217	fscanf((fp), "%s %s gateway %s metric %d %s\n", \
	218	type, dname, gname, &metric, qual)
	219	for (;;) {
85d8a62e SL	220	if (readentry(fp) == EOF)
85d8a62e SL	221	break;
7fe7fe74	222	if (!getnetorhostname(type, dname, &dst))
85d8a62e	223	continue;
7fe7fe74	224	if (!gethostnameornumber(gname, &gate))
85d8a62e	225	continue;
ad34083f MK	226	if (strcmp(qual, "passive") == 0) {
	227	/*
	228	* Passive entries aren't placed in our tables,
	229	* only the kernel's, so we don't copy all of the
	230	* external routing information within a net.
	231	* Internal machines should use the default
	232	* route to a suitable gateway (like us).
	233	*/
	234	route.rt_dst = (struct sockaddr ) &dst;
	235	route.rt_router = (struct sockaddr ) &gate;
	236	route.rt_flags = RTF_UP;
	237	if (strcmp(type, "host") == 0)
	238	route.rt_flags \|= RTF_HOST;
	239	if (metric)
	240	route.rt_flags \|= RTF_GATEWAY;
	241	(void) ioctl(s, SIOCADDRT, (char *)&route.rt_rt);
	242	continue;
	243	}
	244	/* assume no duplicate entries */
	245	externalinterfaces++;
85d8a62e SL	246	ifp = (struct interface )malloc(sizeof (ifp));
	247	bzero((char )ifp, sizeof (ifp));
	248	ifp->int_flags = IFF_REMOTE;
	249	/* can't identify broadcast capability */
	250	ifp->int_net = inet_netof(dst.sin_addr);
	251	if (strcmp(type, "host") == 0) {
	252	ifp->int_flags \|= IFF_POINTOPOINT;
	253	ifp->int_dstaddr = ((struct sockaddr )&dst);
	254	}
85d8a62e SL	255	ifp->int_addr = ((struct sockaddr )&gate);
	256	ifp->int_metric = metric;
	257	ifp->int_next = ifnet;
	258	ifnet = ifp;
	259	addrouteforif(ifp);
	260	}
	261	fclose(fp);
	262	}
7fe7fe74 SL	263
	264	getnetorhostname(type, name, sin)
	265	char type, name;
	266	struct sockaddr_in *sin;
	267	{
	268
	269	if (strcmp(type, "net") == 0) {
	270	struct netent *np = getnetbyname(name);
	271	int n;
	272
7fe7fe74 SL	273	if (np == 0)
7fe7fe74 SL	274	n = inet_network(name);
20932249 SL	275	else {
	276	if (np->n_addrtype != AF_INET)
	277	return (0);
7fe7fe74	278	n = np->n_net;
04667a08 MK	279	/*
	280	* getnetbyname returns right-adjusted value.
	281	*/
	282	if (n < 128)
	283	n <<= IN_CLASSA_NSHIFT;
	284	else if (n < 65536)
	285	n <<= IN_CLASSB_NSHIFT;
	286	else
	287	n <<= IN_CLASSC_NSHIFT;
20932249	288	}
7fe7fe74 SL	289	sin->sin_family = AF_INET;
	290	sin->sin_addr = inet_makeaddr(n, INADDR_ANY);
	291	return (1);
	292	}
	293	if (strcmp(type, "host") == 0) {
	294	struct hostent *hp = gethostbyname(name);
	295
7fe7fe74 SL	296	if (hp == 0)
7fe7fe74 SL	297	sin->sin_addr.s_addr = inet_addr(name);
20932249 SL	298	else {
	299	if (hp->h_addrtype != AF_INET)
	300	return (0);
7fe7fe74	301	bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
20932249	302	}
7fe7fe74 SL	303	sin->sin_family = AF_INET;
	304	return (1);
	305	}
	306	return (0);
	307	}
	308
	309	gethostnameornumber(name, sin)
	310	char *name;
	311	struct sockaddr_in *sin;
	312	{
	313	struct hostent *hp;
	314
	315	hp = gethostbyname(name);
	316	if (hp) {
	317	bcopy(hp->h_addr, &sin->sin_addr, hp->h_length);
	318	sin->sin_family = hp->h_addrtype;
	319	return (1);
	320	}
	321	sin->sin_addr.s_addr = inet_addr(name);
	322	sin->sin_family = AF_INET;
	323	return (sin->sin_addr.s_addr != -1);
	324	}