Return to startup.c CVS log

Up to [CSRG BSD Unix] / 43BSD / etc / XNSrouted

Annotation of 43BSD/etc/XNSrouted/startup.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1985 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:  * Includes material written at Cornell University by Bill Nesheim,
        !             7:  * by permission of the author.
        !             8:  */
        !             9: 
        !            10: 
        !            11: #ifndef lint
        !            12: static char sccsid[] = "@(#)startup.c  5.5 (Berkeley) 2/14/86";
        !            13: #endif not lint
        !            14: 
        !            15: /*
        !            16:  * Routing Table Management Daemon
        !            17:  */
        !            18: #include "defs.h"
        !            19: #include <sys/ioctl.h>
        !            20: #include <net/if.h>
        !            21: #include <nlist.h>
        !            22: #include <syslog.h>
        !            23: 
        !            24: struct interface *ifnet;
        !            25: int    lookforinterfaces = 1;
        !            26: int    performnlist = 1;
        !            27: int    gateway = 0;
        !            28: int    externalinterfaces = 0;         /* # of remote and local interfaces */
        !            29: char ether_broadcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
        !            30: 
        !            31: 
        !            32: /*
        !            33:  * Find the network interfaces which have configured themselves.
        !            34:  * If the interface is present but not yet up (for example an
        !            35:  * ARPANET IMP), set the lookforinterfaces flag so we'll
        !            36:  * come back later and look again.
        !            37:  */
        !            38: ifinit()
        !            39: {
        !            40:        struct interface ifs, *ifp;
        !            41:        int s, n;
        !            42:         struct ifconf ifc;
        !            43:        char buf[(sizeof (struct ifreq ) * 20)];
        !            44:         struct ifreq ifreq, *ifr;
        !            45:        u_long i;
        !            46: 
        !            47:        if ((s = socket(AF_NS, SOCK_DGRAM, 0)) < 0) {
        !            48:                syslog(LOG_ERR, "socket: %m");
        !            49:                exit(1);
        !            50:        }
        !            51:         ifc.ifc_len = sizeof (buf);
        !            52:         ifc.ifc_buf = buf;
        !            53:         if (ioctl(s, SIOCGIFCONF, (char *)&ifc) < 0) {
        !            54:                 syslog(LOG_ERR, "ioctl (get interface configuration)");
        !            55:                close(s);
        !            56:                 return (0);
        !            57:         }
        !            58:         ifr = ifc.ifc_req;
        !            59:        lookforinterfaces = 0;
        !            60:         for (n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++) {
        !            61:                bzero((char *)&ifs, sizeof(ifs));
        !            62:                ifs.int_addr = ifr->ifr_addr;
        !            63:                ifreq = *ifr;
        !            64:                 if (ioctl(s, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
        !            65:                         syslog(LOG_ERR, "ioctl (get interface flags)");
        !            66:                         continue;
        !            67:                 }
        !            68:                ifs.int_flags = ifreq.ifr_flags | IFF_INTERFACE;
        !            69:                if ((ifs.int_flags & IFF_UP) == 0 ||
        !            70:                    ifr->ifr_addr.sa_family == AF_UNSPEC) {
        !            71:                        lookforinterfaces = 1;
        !            72:                        continue;
        !            73:                }
        !            74:                if (ifs.int_addr.sa_family != AF_NS)
        !            75:                        continue;
        !            76:                 if (ifs.int_flags & IFF_POINTOPOINT) {
        !            77:                         if (ioctl(s, SIOCGIFDSTADDR, (char *)&ifreq) < 0) {
        !            78:                                 syslog(LOG_ERR, "ioctl (get dstaddr): %m");
        !            79:                                 continue;
        !            80:                        }
        !            81:                        ifs.int_dstaddr = ifreq.ifr_dstaddr;
        !            82:                }
        !            83:                 if (ifs.int_flags & IFF_BROADCAST) {
        !            84:                         if (ioctl(s, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
        !            85:                                 syslog(LOG_ERR, "ioctl (get broadaddr: %m");
        !            86:                                 continue;
        !            87:                         }
        !            88:                        ifs.int_broadaddr = ifreq.ifr_broadaddr;
        !            89:                }
        !            90:                /* 
        !            91:                 * already known to us? 
        !            92:                 * what makes a POINTOPOINT if unique is its dst addr,
        !            93:                 * NOT its source address 
        !            94:                 */
        !            95:                if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
        !            96:                        if_ifwithdstaddr(&ifs.int_dstaddr)) ||
        !            97:                        ( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
        !            98:                        if_ifwithaddr(&ifs.int_addr)))
        !            99:                        continue;
        !           100:                /* no one cares about software loopback interfaces */
        !           101:                if (strncmp(ifr->ifr_name,"lo", 2)==0)
        !           102:                        continue;
        !           103:                ifp = (struct interface *)malloc(sizeof (struct interface));
        !           104:                if (ifp == 0) {
        !           105:                        syslog(LOG_ERR,"XNSrouted: out of memory\n");
        !           106:                        break;
        !           107:                }
        !           108:                *ifp = ifs;
        !           109:                /*
        !           110:                 * Count the # of directly connected networks
        !           111:                 * and point to point links which aren't looped
        !           112:                 * back to ourself.  This is used below to
        !           113:                 * decide if we should be a routing ``supplier''.
        !           114:                 */
        !           115:                if ((ifs.int_flags & IFF_POINTOPOINT) == 0 ||
        !           116:                    if_ifwithaddr(&ifs.int_dstaddr) == 0)
        !           117:                        externalinterfaces++;
        !           118:                /*
        !           119:                 * If we have a point-to-point link, we want to act
        !           120:                 * as a supplier even if it's our only interface,
        !           121:                 * as that's the only way our peer on the other end
        !           122:                 * can tell that the link is up.
        !           123:                 */
        !           124:                if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
        !           125:                        supplier = 1;
        !           126:                ifp->int_name = malloc(strlen(ifr->ifr_name) + 1);
        !           127:                if (ifp->int_name == 0) {
        !           128:                        syslog(LOG_ERR,"XNSrouted: out of memory\n");
        !           129:                        goto bad;               /* ??? */
        !           130:                }
        !           131:                strcpy(ifp->int_name, ifr->ifr_name);
        !           132:                ifp->int_metric = 0;
        !           133:                ifp->int_next = ifnet;
        !           134:                ifnet = ifp;
        !           135:                traceinit(ifp);
        !           136:                addrouteforif(ifp);
        !           137:        }
        !           138:        if (externalinterfaces > 1 && supplier < 0)
        !           139:                supplier = 1;
        !           140:        close(s);
        !           141:        return;
        !           142: bad:
        !           143:        sleep(60);
        !           144:        close(s);
        !           145:        sleep(60);
        !           146:        execv("/etc/XNSrouted", argv0);
        !           147:        _exit(0177);
        !           148: }
        !           149: 
        !           150: addrouteforif(ifp)
        !           151:        struct interface *ifp;
        !           152: {
        !           153:        struct sockaddr_ns net;
        !           154:        struct sockaddr *dst;
        !           155:        int state, metric;
        !           156:        struct rt_entry *rt;
        !           157: 
        !           158:        if (ifp->int_flags & IFF_POINTOPOINT) {
        !           159:                int (*match)();
        !           160:                register struct interface *ifp2 = ifnet;
        !           161:                register struct interface *ifprev = ifnet;
        !           162:                
        !           163:                dst = &ifp->int_dstaddr;
        !           164: 
        !           165:                /* Search for interfaces with the same net */
        !           166:                ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
        !           167:                match = afswitch[dst->sa_family].af_netmatch;
        !           168:                if (match)
        !           169:                for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
        !           170:                        if (ifp->int_flags & IFF_POINTOPOINT == 0)
        !           171:                                continue;
        !           172:                        if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
        !           173:                                insque(&ifp2->int_sq,&ifp->int_sq);
        !           174:                                break;
        !           175:                        }
        !           176:                }
        !           177:        } else {
        !           178:                dst = &ifp->int_broadaddr;
        !           179:        }
        !           180:        rt = rtlookup(dst);
        !           181:        if (rt)
        !           182:                rtdelete(rt);
        !           183:        if (tracing)
        !           184:                fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
        !           185:        if (ifp->int_transitions++ > 0)
        !           186:                syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
        !           187:        rtadd(dst, &ifp->int_addr, ifp->int_metric,
        !           188:                ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
        !           189: }
        !           190: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.