[unix-history] / usr.sbin / XNSrouted / startup.c

/*
 * Copyright (c) 1985 The Regents of the University of California.
 * All rights reserved.
 *
 * This file includes significant work done at Cornell University by
 * Bill Nesheim.  That work included by permission.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)startup.c	5.11 (Berkeley) 2/26/91";
#endif /* not lint */

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

struct	interface *ifnet;
int	lookforinterfaces = 1;
int	performnlist = 1;
int	gateway = 0;
int	externalinterfaces = 0;		/* # of remote and local interfaces */
char ether_broadcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};


/*
 * 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;
        struct ifconf ifc;
	char buf[BUFSIZ], *cp, *cplim;
        struct ifreq ifreq, *ifr;
	u_long i;

	if ((s = socket(AF_NS, 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);
                exit(1);
        }
        ifr = ifc.ifc_req;
	lookforinterfaces = 0;
#ifdef RTM_ADD
#define max(a, b) (a > b ? a : b)
#define size(p)	max((p).sa_len, sizeof(p))
#else
#define size(p) (sizeof (p))
#endif
	cplim = buf + ifc.ifc_len; /*skip over if's with big ifr_addr's */
	for (cp = buf; cp < cplim;
			cp += sizeof (ifr->ifr_name) + size(ifr->ifr_addr)) {
		ifr = (struct ifreq *)cp;
		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;
		if ((ifs.int_flags & IFF_UP) == 0 ||
		    ifr->ifr_addr.sa_family == AF_UNSPEC) {
			lookforinterfaces = 1;
			continue;
		}
		if (ifs.int_addr.sa_family != AF_NS)
			continue;
                if (ifs.int_flags & IFF_POINTOPOINT) {
                        if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) {
                                syslog(LOG_ERR, "ioctl (get dstaddr): %m");
                                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: %m");
                                continue;
                        }
			ifs.int_broadaddr = ifreq.ifr_broadaddr;
		}
		/* 
		 * already known to us? 
		 * what makes a POINTOPOINT if unique is its dst addr,
		 * NOT its source address 
		 */
		if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
			if_ifwithdstaddr(&ifs.int_dstaddr)) ||
			( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
			if_ifwithaddr(&ifs.int_addr)))
			continue;
		/* no one cares about software loopback interfaces */
		if (strncmp(ifr->ifr_name,"lo", 2)==0)
			continue;
		ifp = (struct interface *)malloc(sizeof (struct interface));
		if (ifp == 0) {
			syslog(LOG_ERR,"XNSrouted: 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) {
			syslog(LOG_ERR,"XNSrouted: out of memory\n");
			exit(1);
		}
		strcpy(ifp->int_name, ifr->ifr_name);
		ifp->int_metric = 0;
		ifp->int_next = ifnet;
		ifnet = ifp;
		traceinit(ifp);
		addrouteforif(ifp);
	}
	if (externalinterfaces > 1 && supplier < 0)
		supplier = 1;
	close(s);
}

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

	if (ifp->int_flags & IFF_POINTOPOINT) {
		int (*match)();
		register struct interface *ifp2 = ifnet;
		register struct interface *ifprev = ifnet;
		
		dst = &ifp->int_dstaddr;

		/* Search for interfaces with the same net */
		ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
		match = afswitch[dst->sa_family].af_netmatch;
		if (match)
		for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
			if (ifp->int_flags & IFF_POINTOPOINT == 0)
				continue;
			if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
				insque(&ifp2->int_sq,&ifp->int_sq);
				break;
			}
		}
	} else {
		dst = &ifp->int_broadaddr;
	}
	rt = rtlookup(dst);
	if (rt)
		rtdelete(rt);
	if (tracing)
		fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
	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));
}
Commit	Line	Data
18916298 RG	1	/*
	2	* Copyright (c) 1985 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This file includes significant work done at Cornell University by
	6	* Bill Nesheim. That work included by permission.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*/
	36
	37	#ifndef lint
	38	static char sccsid[] = "@(#)startup.c 5.11 (Berkeley) 2/26/91";
	39	#endif /* not lint */
	40
	41	/*
	42	* Routing Table Management Daemon
	43	*/
	44	#include "defs.h"
	45	#include <sys/ioctl.h>
	46	#include <net/if.h>
	47	#include <nlist.h>
	48	#include <stdlib.h>
	49
	50	struct interface *ifnet;
	51	int lookforinterfaces = 1;
	52	int performnlist = 1;
	53	int gateway = 0;
	54	int externalinterfaces = 0; /* # of remote and local interfaces */
	55	char ether_broadcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
	56
	57
	58	/*
	59	* Find the network interfaces which have configured themselves.
	60	* If the interface is present but not yet up (for example an
	61	* ARPANET IMP), set the lookforinterfaces flag so we'll
	62	* come back later and look again.
	63	*/
	64	ifinit()
65	{
66	struct interface ifs, *ifp;
67	int s;
68	struct ifconf ifc;
69	char buf[BUFSIZ], cp, cplim;
70	struct ifreq ifreq, *ifr;
71	u_long i;
72
73	if ((s = socket(AF_NS, SOCK_DGRAM, 0)) < 0) {
74	syslog(LOG_ERR, "socket: %m");
75	exit(1);
76	}
77	ifc.ifc_len = sizeof (buf);
78	ifc.ifc_buf = buf;
79	if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
80	syslog(LOG_ERR, "ioctl (get interface configuration)");
81	close(s);
82	exit(1);
83	}
84	ifr = ifc.ifc_req;
85	lookforinterfaces = 0;
86	#ifdef RTM_ADD
87	#define max(a, b) (a > b ? a : b)
88	#define size(p) max((p).sa_len, sizeof(p))
89	#else
90	#define size(p) (sizeof (p))
91	#endif
92	cplim = buf + ifc.ifc_len; /skip over if's with big ifr_addr's /
93	for (cp = buf; cp < cplim;
94	cp += sizeof (ifr->ifr_name) + size(ifr->ifr_addr)) {
95	ifr = (struct ifreq *)cp;
96	bzero((char *)&ifs, sizeof(ifs));
97	ifs.int_addr = ifr->ifr_addr;
98	ifreq = *ifr;
99	if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
100	syslog(LOG_ERR, "ioctl (get interface flags)");
101	continue;
102	}
103	ifs.int_flags = ifreq.ifr_flags \| IFF_INTERFACE;
104	if ((ifs.int_flags & IFF_UP) == 0 \|\|
105	ifr->ifr_addr.sa_family == AF_UNSPEC) {
106	lookforinterfaces = 1;
107	continue;
108	}
109	if (ifs.int_addr.sa_family != AF_NS)
110	continue;
111	if (ifs.int_flags & IFF_POINTOPOINT) {
112	if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) {
113	syslog(LOG_ERR, "ioctl (get dstaddr): %m");
114	continue;
115	}
116	ifs.int_dstaddr = ifreq.ifr_dstaddr;
117	}
118	if (ifs.int_flags & IFF_BROADCAST) {
119	if (ioctl(s, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
120	syslog(LOG_ERR, "ioctl (get broadaddr: %m");
121	continue;
122	}
123	ifs.int_broadaddr = ifreq.ifr_broadaddr;
124	}
125	/*
126	* already known to us?
127	* what makes a POINTOPOINT if unique is its dst addr,
128	* NOT its source address
129	*/
130	if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
131	if_ifwithdstaddr(&ifs.int_dstaddr)) \|\|
132	( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
133	if_ifwithaddr(&ifs.int_addr)))
134	continue;
135	/* no one cares about software loopback interfaces */
136	if (strncmp(ifr->ifr_name,"lo", 2)==0)
137	continue;
138	ifp = (struct interface *)malloc(sizeof (struct interface));
139	if (ifp == 0) {
140	syslog(LOG_ERR,"XNSrouted: out of memory\n");
141	break;
142	}
143	*ifp = ifs;
144	/*
145	* Count the # of directly connected networks
146	* and point to point links which aren't looped
147	* back to ourself. This is used below to
148	* decide if we should be a routing ``supplier''.
149	*/
150	if ((ifs.int_flags & IFF_POINTOPOINT) == 0 \|\|
151	if_ifwithaddr(&ifs.int_dstaddr) == 0)
152	externalinterfaces++;
153	/*
154	* If we have a point-to-point link, we want to act
155	* as a supplier even if it's our only interface,
156	* as that's the only way our peer on the other end
157	* can tell that the link is up.
158	*/
159	if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
160	supplier = 1;
161	ifp->int_name = malloc(strlen(ifr->ifr_name) + 1);
162	if (ifp->int_name == 0) {
163	syslog(LOG_ERR,"XNSrouted: out of memory\n");
164	exit(1);
165	}
166	strcpy(ifp->int_name, ifr->ifr_name);
167	ifp->int_metric = 0;
168	ifp->int_next = ifnet;
169	ifnet = ifp;
170	traceinit(ifp);
171	addrouteforif(ifp);
172	}
173	if (externalinterfaces > 1 && supplier < 0)
174	supplier = 1;
175	close(s);
176	}
177
178	addrouteforif(ifp)
179	struct interface *ifp;
180	{
181	struct sockaddr_ns net;
182	struct sockaddr *dst;
183	int state, metric;
184	struct rt_entry *rt;
185
186	if (ifp->int_flags & IFF_POINTOPOINT) {
187	int (*match)();
188	register struct interface *ifp2 = ifnet;
189	register struct interface *ifprev = ifnet;
190
191	dst = &ifp->int_dstaddr;
192
193	/* Search for interfaces with the same net */
194	ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
195	match = afswitch[dst->sa_family].af_netmatch;
196	if (match)
197	for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
198	if (ifp->int_flags & IFF_POINTOPOINT == 0)
199	continue;
200	if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
201	insque(&ifp2->int_sq,&ifp->int_sq);
202	break;
203	}
204	}
205	} else {
206	dst = &ifp->int_broadaddr;
207	}
208	rt = rtlookup(dst);
209	if (rt)
210	rtdelete(rt);
211	if (tracing)
212	fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
213	if (ifp->int_transitions++ > 0)
214	syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
215	rtadd(dst, &ifp->int_addr, ifp->int_metric,
216	ifp->int_flags & (IFF_INTERFACE\|IFF_PASSIVE\|IFF_REMOTE));
217	}
218