diff options
Diffstat (limited to 'usr.sbin/XNSrouted/input.c')
| -rw-r--r-- | usr.sbin/XNSrouted/input.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/usr.sbin/XNSrouted/input.c b/usr.sbin/XNSrouted/input.c deleted file mode 100644 index 14d352f..0000000 --- a/usr.sbin/XNSrouted/input.c +++ /dev/null @@ -1,189 +0,0 @@ -/* - * Copyright (c) 1985, 1993 - * 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[] = "@(#)input.c 8.1 (Berkeley) 6/5/93"; -#endif /* not lint */ - -/* - * XNS Routing Table Management Daemon - */ -#include "defs.h" - -struct sockaddr * -xns_nettosa(net) -union ns_net net; -{ - static struct sockaddr_ns sxn; - extern char ether_broadcast_addr[6]; - - bzero(&sxn, sizeof (struct sockaddr_ns)); - sxn.sns_family = AF_NS; - sxn.sns_len = sizeof (sxn); - sxn.sns_addr.x_net = net; - sxn.sns_addr.x_host = *(union ns_host *)ether_broadcast_addr; - return( (struct sockaddr *)&sxn); - -} - -/* - * Process a newly received packet. - */ -rip_input(from, size) - struct sockaddr *from; - int size; -{ - struct rt_entry *rt; - struct netinfo *n; - struct interface *ifp; - int newsize; - struct afswitch *afp; - - - ifp = 0; - TRACE_INPUT(ifp, from, size); - if (from->sa_family >= AF_MAX) - return; - afp = &afswitch[from->sa_family]; - - size -= sizeof (u_short) /* command */; - n = msg->rip_nets; - - switch (ntohs(msg->rip_cmd)) { - - case RIPCMD_REQUEST: - newsize = 0; - while (size > 0) { - if (size < sizeof (struct netinfo)) - break; - size -= sizeof (struct netinfo); - - /* - * A single entry with rip_dst == DSTNETS_ALL and - * metric ``infinity'' means ``all routes''. - */ - if (ns_neteqnn(n->rip_dst, ns_anynet) && - ntohs(n->rip_metric) == HOPCNT_INFINITY && - size == 0) { - ifp = if_ifwithnet(from); - supply(from, 0, ifp); - return; - } - /* - * request for specific nets - */ - rt = rtlookup(xns_nettosa(n->rip_dst)); - if (ftrace) { - fprintf(ftrace, - "specific request for %s", - xns_nettoa(n->rip_dst)); - fprintf(ftrace, - " yields route %x\n", - rt); - } - n->rip_metric = htons( rt == 0 ? HOPCNT_INFINITY : - min(rt->rt_metric+1, HOPCNT_INFINITY)); - n++; - newsize += sizeof (struct netinfo); - } - if (newsize > 0) { - msg->rip_cmd = htons(RIPCMD_RESPONSE); - newsize += sizeof (u_short); - /* should check for if with dstaddr(from) first */ - (*afp->af_output)(0, from, newsize); - ifp = if_ifwithnet(from); - TRACE_OUTPUT(ifp, from, newsize); - if (ftrace) { - fprintf(ftrace, - "request arrived on interface %s\n", - ifp->int_name); - } - } - return; - - case RIPCMD_RESPONSE: - /* verify message came from a router */ - if ((*afp->af_portmatch)(from) == 0) - return; - (*afp->af_canon)(from); - /* are we talking to ourselves? */ - if (ifp = if_ifwithaddr(from)) { - rt = rtfind(from); - if (rt == 0 || (rt->rt_state & RTS_INTERFACE) == 0) - addrouteforif(ifp); - else - rt->rt_timer = 0; - return; - } - /* Update timer for interface on which the packet arrived. - * If from other end of a point-to-point link that isn't - * in the routing tables, (re-)add the route. - */ - if ((rt = rtfind(from)) && (rt->rt_state & RTS_INTERFACE)) { - if(ftrace) fprintf(ftrace, "Got route\n"); - rt->rt_timer = 0; - } else if (ifp = if_ifwithdstaddr(from)) { - if(ftrace) fprintf(ftrace, "Got partner\n"); - addrouteforif(ifp); - } - for (; size > 0; size -= sizeof (struct netinfo), n++) { - struct sockaddr *sa; - if (size < sizeof (struct netinfo)) - break; - if ((unsigned) ntohs(n->rip_metric) >= HOPCNT_INFINITY) - continue; - rt = rtfind(sa = xns_nettosa(n->rip_dst)); - if (rt == 0) { - rtadd(sa, from, ntohs(n->rip_metric), 0); - continue; - } - - /* - * Update if from gateway and different, - * from anywhere and shorter, or getting stale and equivalent. - */ - if ((equal(from, &rt->rt_router) && - ntohs(n->rip_metric) != rt->rt_metric ) || - (unsigned) ntohs(n->rip_metric) < rt->rt_metric || - (rt->rt_timer > (EXPIRE_TIME/2) && - rt->rt_metric == ntohs(n->rip_metric))) { - rtchange(rt, from, ntohs(n->rip_metric)); - rt->rt_timer = 0; - } - } - return; - } -} |
