- struct nlist *nlp;
-
- signal(SIGHUP, getkmem);
- if (kmemf >= 0)
- (void) close(kmemf);
-loop:
- for (nlp = &nl[sizeof (nl) / sizeof (nl[0])]; --nlp >= nl; ) {
- nlp->n_value = 0;
- nlp->n_type = 0;
- }
- nlist("/vmunix", nl);
- if (nl[0].n_value == 0) {
- fprintf(stderr, "/vmunix namelist botch\n");
- sleep(300);
- goto loop;
- }
- kmemf = open("/dev/kmem", 0);
- if (kmemf < 0) {
- perror("/dev/kmem");
- sleep(300);
- goto loop;
- }
- (void) lseek(kmemf, (long)nl[NL_BOOTIME].n_value, 0);
- (void) read(kmemf, (char *)&mywd.wd_bootime, sizeof (mywd.wd_bootime));
+ register struct neighbor *np;
+ register struct if_msghdr *ifm;
+ register struct ifa_msghdr *ifam;
+ struct sockaddr_dl *sdl;
+ size_t needed;
+ int mib[6], flags = 0, len;
+ char *buf, *lim, *next;
+ struct rt_addrinfo info;
+
+ mib[0] = CTL_NET;
+ mib[1] = PF_ROUTE;
+ mib[2] = 0;
+ mib[3] = AF_INET;
+ mib[4] = NET_RT_IFLIST;
+ mib[5] = 0;
+ if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
+ quit("route-sysctl-estimate");
+ if ((buf = malloc(needed)) == NULL)
+ quit("malloc");
+ if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
+ quit("actual retrieval of interface table");
+ lim = buf + needed;
+
+ sdl = NULL; /* XXX just to keep gcc -Wall happy */
+ for (next = buf; next < lim; next += ifm->ifm_msglen) {
+ ifm = (struct if_msghdr *)next;
+ if (ifm->ifm_type == RTM_IFINFO) {
+ sdl = (struct sockaddr_dl *)(ifm + 1);
+ flags = ifm->ifm_flags;
+ continue;
+ }
+ if ((flags & IFF_UP) == 0 ||
+ (flags & (IFF_BROADCAST|IFF_POINTOPOINT)) == 0)
+ continue;
+ if (ifm->ifm_type != RTM_NEWADDR)
+ quit("out of sync parsing NET_RT_IFLIST");
+ ifam = (struct ifa_msghdr *)ifm;
+ info.rti_addrs = ifam->ifam_addrs;
+ rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam,
+ &info);
+ /* gag, wish we could get rid of Internet dependencies */
+#define dstaddr info.rti_info[RTAX_BRD]
+#define IPADDR_SA(x) ((struct sockaddr_in *)(x))->sin_addr.s_addr
+#define PORT_SA(x) ((struct sockaddr_in *)(x))->sin_port
+ if (dstaddr == 0 || dstaddr->sa_family != AF_INET)
+ continue;
+ PORT_SA(dstaddr) = sp->s_port;
+ for (np = neighbors; np != NULL; np = np->n_next)
+ if (memcmp(sdl->sdl_data, np->n_name,
+ sdl->sdl_nlen) == 0 &&
+ IPADDR_SA(np->n_addr) == IPADDR_SA(dstaddr))
+ break;
+ if (np != NULL)
+ continue;
+ len = sizeof(*np) + dstaddr->sa_len + sdl->sdl_nlen + 1;
+ np = (struct neighbor *)malloc(len);
+ if (np == NULL)
+ quit("malloc of neighbor structure");
+ memset(np, 0, len);
+ np->n_flags = flags;
+ np->n_addr = (struct sockaddr *)(np + 1);
+ np->n_addrlen = dstaddr->sa_len;
+ np->n_name = np->n_addrlen + (char *)np->n_addr;
+ np->n_next = neighbors;
+ neighbors = np;
+ memcpy((char *)np->n_addr, (char *)dstaddr, np->n_addrlen);
+ memcpy(np->n_name, sdl->sdl_data, sdl->sdl_nlen);
+ }
+ free(buf);
+ return (1);