]> git.saurik.com Git - apple/network_cmds.git/blobdiff - netstat.tproj/if.c
network_cmds-245.tar.gz
[apple/network_cmds.git] / netstat.tproj / if.c
index 0be2dc8136b02844f28e8beeabf07f5e2190f371..ecee15d5753a15b988935bce103b8793a45894a0 100644 (file)
 static char sccsid[] = "@(#)if.c       8.3 (Berkeley) 4/28/95";
 */
 static const char rcsid[] =
-       "$Id: if.c,v 1.2 2002/03/05 20:35:13 lindak Exp $";
+       "$Id: if.c,v 1.6 2005/01/25 00:10:05 lindak Exp $";
 #endif /* not lint */
 
 #include <sys/types.h>
-#include <sys/protosw.h>
 #include <sys/socket.h>
 #include <sys/sysctl.h>
 #include <sys/time.h>
@@ -49,7 +48,10 @@ static const char rcsid[] =
 #include <net/if_var.h>
 #include <net/if_dl.h>
 #include <net/if_types.h>
+#include <net/if_mib.h>
 #include <net/ethernet.h>
+#include <net/route.h>
+
 #include <netinet/in.h>
 #include <netinet/in_var.h>
 
@@ -68,22 +70,33 @@ static const char rcsid[] =
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
+#include <stdlib.h>
+#include <err.h>
 
 #include "netstat.h"
 
 #define        YES     1
 #define        NO      0
 
-static void sidewaysintpr (u_int, u_long);
+#define ROUNDUP(a, size) (((a) & ((size) - 1)) ? (1 + ((a)|(size - 1))) : (a))
+
+#define NEXT_SA(p) (struct sockaddr *) \
+    ((caddr_t)p + (p->sa_len ? ROUNDUP(p->sa_len, sizeof(u_long)) : \
+    sizeof(u_long)))
+
+static void sidewaysintpr ();
 static void catchalarm (int);
 
 #ifdef INET6
-char *netname6 (struct sockaddr_in6 *, struct in6_addr *);
+char *netname6 (struct sockaddr_in6 *, struct sockaddr *);
 static char ntop_buf[INET6_ADDRSTRLEN];                /* for inet_ntop() */
-static int bdg_done;
 #endif
 
 #if 0
+#ifdef INET6
+static int bdg_done;
+#endif
+
 /* print bridge statistics */
 void
 bdg_stats(u_long dummy , char *name, int af )
@@ -131,7 +144,7 @@ bdg_stats(u_long dummy , char *name, int af )
  * Display a formatted value, or a '-' in the same space.
  */
 static void
-show_stat(const char *fmt, int width, u_long value, short showvalue)
+show_stat(const char *fmt, int width, u_int64_t value, short showvalue)
 {
        char newfmt[32];
 
@@ -145,63 +158,139 @@ show_stat(const char *fmt, int width, u_long value, short showvalue)
        }
 }
 
+size_t
+get_rti_info(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
+{
+    int                        i;
+    size_t             len = 0;
+
+    for (i = 0; i < RTAX_MAX; i++) {
+        if (addrs & (1 << i)) {
+            rti_info[i] = sa;
+            if (sa->sa_len < sizeof(struct sockaddr))
+                len += sizeof(struct sockaddr);
+            else
+                len += sa->sa_len;
+            sa = NEXT_SA(sa);
+        } else {
+            rti_info[i] = NULL;
+        }
+    }
+    return len;
+}
 
+static void
+multipr(int family, char *buf, char *lim)
+{
+    char  *next;
+
+    for (next = buf; next < lim; ) {
+               struct ifma_msghdr2     *ifmam = (struct ifma_msghdr2 *)next;
+               struct sockaddr *rti_info[RTAX_MAX];
+               struct sockaddr *sa;
+               const char *fmt = 0;
+               
+               next += ifmam->ifmam_msglen;
+               if (ifmam->ifmam_type == RTM_IFINFO2)
+                       break;
+               else if (ifmam->ifmam_type != RTM_NEWMADDR2)
+                       continue;
+               get_rti_info(ifmam->ifmam_addrs, (struct sockaddr*)(ifmam + 1), rti_info);
+               sa = rti_info[RTAX_IFA];
+               
+               if (sa->sa_family != family)
+                       continue;
+               switch (sa->sa_family) {
+                       case AF_INET: {
+                               struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+                               
+                               fmt = routename(sin->sin_addr.s_addr);
+                               break;
+                       }
+       #ifdef INET6
+                       case AF_INET6: {
+                               struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+
+                               printf("%23s %-19.19s(refs: %d)\n", "",
+                                               inet_ntop(AF_INET6,
+                                               &sin6->sin6_addr,
+                                               ntop_buf,
+                                               sizeof(ntop_buf)),
+                                               ifmam->ifmam_refcount);
+                               break;
+                       }
+       #endif /* INET6 */
+                       case AF_LINK: {
+                               struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
+                               
+                               switch (sdl->sdl_type) {
+                               case IFT_ETHER:
+                               case IFT_FDDI:
+                                       fmt = ether_ntoa(
+                                               (struct ether_addr *)
+                                               LLADDR(sdl));
+                                       break;
+                               }
+                               break;
+                       }
+               }
+               if (fmt)
+                       printf("%23s %s\n", "", fmt);
+       }
+}
 
 /*
  * Print a description of the network interfaces.
  */
 void
-intpr(int interval, u_long ifnetaddr, void (*pfunc)(char *))
+intpr(void (*pfunc)(char *))
 {
-       struct ifnet ifnet;
-       struct ifnethead ifnethead;
-       union {
-               struct ifaddr ifa;
-               struct in_ifaddr in;
-#ifdef INET6
-               struct in6_ifaddr in6;
-#endif
-#if 0
-               struct ipx_ifaddr ipx;
-#endif
-#ifdef NS
-               struct ns_ifaddr ns;
-#endif
-#ifdef ISO
-               struct iso_ifaddr iso;
-#endif
-       } ifaddr;
-       u_long ifaddraddr;
-       u_long ifaddrfound;
-       u_long ifnetfound;
-       u_long opackets;
-       u_long ipackets;
-       u_long obytes;
-       u_long ibytes;
-       u_long oerrors;
-       u_long ierrors;
-       u_long collisions;
-       short timer;
-       int drops;
+       u_int64_t opackets = 0;
+       u_int64_t ipackets = 0;
+       u_int64_t obytes = 0;
+       u_int64_t ibytes = 0;
+       u_int64_t oerrors = 0;
+       u_int64_t ierrors = 0;
+       u_int64_t collisions = 0;
+       u_long mtu = 0;
+       short timer = 0;
+       int drops = 0;
        struct sockaddr *sa = NULL;
-       char name[32], tname[16];
+       char name[32];
        short network_layer;
        short link_layer;
-
-       if (ifnetaddr == 0) {
-               printf("ifnet: symbol not defined\n");
-               return;
-       }
+    int mib[6];
+    char *buf = NULL, *lim, *next;
+       size_t len;
+       struct if_msghdr *ifm;
+       struct sockaddr *rti_info[RTAX_MAX];
+       unsigned int ifindex = 0;
+       
        if (interval) {
-               sidewaysintpr((unsigned)interval, ifnetaddr);
+               sidewaysintpr();
                return;
        }
-       if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
+       
+       if (interface != 0)
+               ifindex = if_nametoindex(interface);
+       
+       mib[0]  = CTL_NET;                      // networking subsystem
+       mib[1]  = PF_ROUTE;                     // type of information
+       mib[2]  = 0;                            // protocol (IPPROTO_xxx)
+       mib[3]  = 0;                            // address family
+       mib[4]  = NET_RT_IFLIST2;       // operation
+       mib[5]  = 0;
+       if (sysctl(mib, 6, NULL, &len, NULL, 0) < 0)
                return;
-       ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
-       if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
+       if ((buf = malloc(len)) == NULL) {
+               printf("malloc failed\n");
+               exit(1);
+       }
+       if (sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
+               if (buf)
+                       free(buf);
                return;
-
+       }
        if (!pfunc) {
                printf("%-5.5s %-5.5s %-13.13s %-15.15s %8.8s %5.5s",
                       "Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
@@ -217,27 +306,23 @@ intpr(int interval, u_long ifnetaddr, void (*pfunc)(char *))
                        printf(" %s", "Drop");
                putchar('\n');
        }
-       ifaddraddr = 0;
-       while (ifnetaddr || ifaddraddr) {
-               struct sockaddr_in *sin;
-#ifdef INET6
-               struct sockaddr_in6 *sin6;
-#endif
-               register char *cp;
+    lim = buf + len;
+    for (next = buf; next < lim; ) {
+               char *cp;
                int n, m;
-
+               
                network_layer = 0;
                link_layer = 0;
+        ifm = (struct if_msghdr *)next;
+               next += ifm->ifm_msglen;
+
+        if (ifm->ifm_type == RTM_IFINFO2) {
+                       struct if_msghdr2 *if2m = (struct if_msghdr2 *)ifm;
+            struct sockaddr_dl *sdl = (struct sockaddr_dl *)(if2m + 1);
 
-               if (ifaddraddr == 0) {
-                       ifnetfound = ifnetaddr;
-                       if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) ||
-                           kread((u_long)ifnet.if_name, tname, 16))
-                               return;
-                       tname[15] = '\0';
-                       ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
-                       snprintf(name, 32, "%s%d", tname, ifnet.if_unit);
-                       if (interface != 0 && (strcmp(name, interface) != 0))
+                       strncpy(name, sdl->sdl_data, sdl->sdl_nlen);
+                       name[sdl->sdl_nlen] = 0;
+                       if (interface != 0 && if2m->ifm_index != ifindex)
                                continue;
                        cp = index(name, '\0');
 
@@ -246,71 +331,71 @@ intpr(int interval, u_long ifnetaddr, void (*pfunc)(char *))
                                continue;
                        }
 
-                       if ((ifnet.if_flags&IFF_UP) == 0)
+                       if ((if2m->ifm_flags & IFF_UP) == 0)
                                *cp++ = '*';
                        *cp = '\0';
-                       ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead);
-               }
-               printf("%-5.5s %-5lu ", name, ifnet.if_mtu);
-               ifaddrfound = ifaddraddr;
-
-               /*
-                * Get the interface stats.  These may get
-                * overriden below on a per-interface basis.
-                */
-               opackets = ifnet.if_opackets;
-               ipackets = ifnet.if_ipackets;
-               obytes = ifnet.if_obytes;
-               ibytes = ifnet.if_ibytes;
-               oerrors = ifnet.if_oerrors;
-               ierrors = ifnet.if_ierrors;
-               collisions = ifnet.if_collisions;
-               timer = ifnet.if_timer;
-               drops = ifnet.if_snd.ifq_drops;
-
-               if (ifaddraddr == 0) {
+
+                       /*
+                        * Get the interface stats.  These may get
+                        * overriden below on a per-interface basis.
+                        */
+                       opackets = if2m->ifm_data.ifi_opackets;
+                       ipackets = if2m->ifm_data.ifi_ipackets;
+                       obytes = if2m->ifm_data.ifi_obytes;
+                       ibytes = if2m->ifm_data.ifi_ibytes;
+                       oerrors =if2m->ifm_data.ifi_oerrors;
+                       ierrors = if2m->ifm_data.ifi_ierrors;
+                       collisions = if2m->ifm_data.ifi_collisions;
+                       timer = if2m->ifm_timer;
+                       drops = if2m->ifm_snd_drops;
+                       mtu = if2m->ifm_data.ifi_mtu;
+
+            get_rti_info(if2m->ifm_addrs, (struct sockaddr*)(if2m + 1), rti_info);
+                       sa = rti_info[RTAX_IFP];
+        } else if (ifm->ifm_type == RTM_NEWADDR) {
+            struct ifa_msghdr  *ifam = (struct ifa_msghdr *)ifm;
+                       
+                       if (interface != 0 && ifam->ifam_index != ifindex)
+                               continue;
+            get_rti_info(ifam->ifam_addrs, (struct sockaddr*)(ifam + 1), rti_info);
+                       sa = rti_info[RTAX_IFA];
+               } else
+                       continue;
+               printf("%-5.5s %-5lu ", name, mtu);
+
+               if (sa == 0) {
                        printf("%-13.13s ", "none");
                        printf("%-15.15s ", "none");
                } else {
-                       if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
-                               ifaddraddr = 0;
-                               continue;
-                       }
-#define CP(x) ((char *)(x))
-                       cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
-                               CP(&ifaddr);
-                       sa = (struct sockaddr *)cp;
                        switch (sa->sa_family) {
                        case AF_UNSPEC:
                                printf("%-13.13s ", "none");
                                printf("%-15.15s ", "none");
                                break;
-                       case AF_INET:
-                               sin = (struct sockaddr_in *)sa;
-#ifdef notdef
-                               /* can't use inet_makeaddr because kernel
-                                * keeps nets unshifted.
-                                */
-                               in = inet_makeaddr(ifaddr.in.ia_subnet,
-                                       INADDR_ANY);
-                               printf("%-13.13s ", netname(in.s_addr,
-                                   ifaddr.in.ia_subnetmask));
-#else
-                               printf("%-13.13s ",
-                                   netname(htonl(ifaddr.in.ia_subnet),
-                                   ifaddr.in.ia_subnetmask));
-#endif
+                       case AF_INET: {
+                               struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+                               struct sockaddr_in mask;
+                               
+                               mask.sin_addr.s_addr = 0;
+                               memcpy(&mask, rti_info[RTAX_NETMASK], ((struct sockaddr_in *)rti_info[RTAX_NETMASK])->sin_len);
+                               
+                               printf("%-13.13s ", netname(sin->sin_addr.s_addr & mask.sin_addr.s_addr,
+                                   mask.sin_addr.s_addr));
+
                                printf("%-15.15s ",
                                    routename(sin->sin_addr.s_addr));
 
                                network_layer = 1;
                                break;
+                       }
 #ifdef INET6
-                       case AF_INET6:
-                               sin6 = (struct sockaddr_in6 *)sa;
+                       case AF_INET6: {
+                               struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
+                               struct sockaddr *mask = (struct sockaddr *)rti_info[RTAX_NETMASK];
+
                                printf("%-11.11s ",
-                                      netname6(&ifaddr.in6.ia_addr,
-                                               &ifaddr.in6.ia_prefixmask.sin6_addr));
+                                      netname6(sin6,
+                                               mask));
                                printf("%-17.17s ",
                                    (char *)inet_ntop(AF_INET6,
                                        &sin6->sin6_addr,
@@ -318,46 +403,8 @@ intpr(int interval, u_long ifnetaddr, void (*pfunc)(char *))
 
                                network_layer = 1;
                                break;
+                       }
 #endif /*INET6*/
-#if 0
-                       case AF_IPX:
-                               {
-                               struct sockaddr_ipx *sipx =
-                                       (struct sockaddr_ipx *)sa;
-                               u_long net;
-                               char netnum[10];
-
-                               *(union ipx_net *) &net = sipx->sipx_addr.x_net;
-                               sprintf(netnum, "%lx", (u_long)ntohl(net));
-                               printf("ipx:%-8s  ", netnum);
-/*                             printf("ipx:%-8s ", netname(net, 0L)); */
-                               printf("%-15s ",
-                                   ipx_phost((struct sockaddr *)sipx));
-                               }
-                               break;
-
-                       case AF_APPLETALK:
-                               printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
-                               printf("%-9.9s  ",atalk_print(sa,0x0b) );
-                               break;
-#endif
-#ifdef NS
-                       case AF_NS:
-                               {
-                               struct sockaddr_ns *sns =
-                                       (struct sockaddr_ns *)sa;
-                               u_long net;
-                               char netnum[10];
-
-                               *(union ns_net *) &net = sns->sns_addr.x_net;
-                               sprintf(netnum, "%lxH", ntohl(net));
-                               upHex(netnum);
-                               printf("ns:%-8s ", netnum);
-                               printf("%-15s ",
-                                   ns_phost((struct sockaddr *)sns));
-                               }
-                               break;
-#endif
                        case AF_LINK:
                                {
                                struct sockaddr_dl *sdl =
@@ -398,107 +445,51 @@ intpr(int interval, u_long ifnetaddr, void (*pfunc)(char *))
                                ibytes = ifaddr.in.ia_ifa.if_ibytes;
                        }
 #endif
-                       ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
                }
 
-               show_stat("lu", 8, ipackets, link_layer|network_layer);
+               show_stat("llu", 8, ipackets, link_layer|network_layer);
                printf(" ");
-               show_stat("lu", 5, ierrors, link_layer);
+               show_stat("llu", 5, ierrors, link_layer);
                printf(" ");
                if (bflag) {
-                       show_stat("lu", 10, ibytes, link_layer|network_layer);
+                       show_stat("llu", 10, ibytes, link_layer|network_layer);
                        printf(" ");
                }
-               show_stat("lu", 8, opackets, link_layer|network_layer);
+               show_stat("llu", 8, opackets, link_layer|network_layer);
                printf(" ");
-               show_stat("lu", 5, oerrors, link_layer);
+               show_stat("llu", 5, oerrors, link_layer);
                printf(" ");
                if (bflag) {
-                       show_stat("lu", 10, obytes, link_layer|network_layer);
+                       show_stat("llu", 10, obytes, link_layer|network_layer);
                        printf(" ");
                }
-               show_stat("lu", 5, collisions, link_layer);
+               show_stat("llu", 5, collisions, link_layer);
                if (tflag) {
                        printf(" ");
-                       show_stat("d", 3, timer, link_layer);
+                       show_stat("ll", 3, timer, link_layer);
                }
                if (dflag) {
                        printf(" ");
-                       show_stat("d", 3, drops, link_layer);
+                       show_stat("ll", 3, drops, link_layer);
                }
                putchar('\n');
-               if (aflag && ifaddrfound) {
-                       /*
-                        * Print family's multicast addresses
-                        */
-                       u_long multiaddr;
-                       struct ifmultiaddr ifma;
-                       union {
-                               struct sockaddr sa;
-                               struct sockaddr_in in;
-#ifdef INET6
-                               struct sockaddr_in6 in6;
-#endif /* INET6 */
-                               struct sockaddr_dl dl;
-                       } msa;
-                       const char *fmt;
-
-                       for(multiaddr = (u_long)ifnet.if_multiaddrs.lh_first;
-                           multiaddr;
-                           multiaddr = (u_long)ifma.ifma_link.le_next) {
-                               if (kread(multiaddr, (char *)&ifma,
-                                         sizeof ifma))
-                                       break;
-                               if (kread((u_long)ifma.ifma_addr, (char *)&msa,
-                                         sizeof msa))
-                                       break;
-                               if (msa.sa.sa_family != sa->sa_family)
-                                       continue;
-                               
-                               fmt = 0;
-                               switch (msa.sa.sa_family) {
-                               case AF_INET:
-                                       fmt = routename(msa.in.sin_addr.s_addr);
-                                       break;
-#ifdef INET6
-                               case AF_INET6:
-                                       printf("%23s %-19.19s(refs: %d)\n", "",
-                                              inet_ntop(AF_INET6,
-                                                        &msa.in6.sin6_addr,
-                                                        ntop_buf,
-                                                        sizeof(ntop_buf)),
-                                              ifma.ifma_refcount);
-                                       break;
-#endif /* INET6 */
-                               case AF_LINK:
-                                       switch (msa.dl.sdl_type) {
-                                       case IFT_ETHER:
-                                       case IFT_FDDI:
-                                               fmt = ether_ntoa(
-                                                       (struct ether_addr *)
-                                                       LLADDR(&msa.dl));
-                                               break;
-                                       }
-                                       break;
-                               }
-                               if (fmt)
-                                       printf("%23s %s\n", "", fmt);
-                       }
-               }
+
+               if (aflag) 
+                       multipr(sa->sa_family, next, lim);
        }
 }
 
 struct iftot {
        SLIST_ENTRY(iftot) chain;
-       char    ift_name[16];           /* interface name */
-       u_long  ift_ip;                 /* input packets */
-       u_long  ift_ie;                 /* input errors */
-       u_long  ift_op;                 /* output packets */
-       u_long  ift_oe;                 /* output errors */
-       u_long  ift_co;                 /* collisions */
-       u_int   ift_dr;                 /* drops */
-       u_long  ift_ib;                 /* input bytes */
-       u_long  ift_ob;                 /* output bytes */
+       char            ift_name[16];   /* interface name */
+       u_int64_t       ift_ip;                 /* input packets */
+       u_int64_t       ift_ie;                 /* input errors */
+       u_int64_t       ift_op;                 /* output packets */
+       u_int64_t       ift_oe;                 /* output errors */
+       u_int64_t       ift_co;                 /* collisions */
+       u_int64_t       ift_dr;                 /* drops */
+       u_int64_t       ift_ib;                 /* input bytes */
+       u_int64_t       ift_ob;                 /* output bytes */
 };
 
 u_char signalled;                      /* set if alarm goes off "early" */
@@ -511,61 +502,55 @@ u_char    signalled;                      /* set if alarm goes off "early" */
  * XXX - should be rewritten to use ifmib(4).
  */
 static void
-sidewaysintpr(unsigned interval, u_long off)
+sidewaysintpr()
 {
-       struct ifnet ifnet;
-       u_long firstifnet;
-       struct ifnethead ifnethead;
-       struct iftot *iftot, *ip, *ipn, *total, *sum, *interesting;
+       struct iftot *total, *sum, *interesting;
        register int line;
        int oldmask, first;
-       u_long interesting_off;
-
-       if (kread(off, (char *)&ifnethead, sizeof ifnethead))
-               return;
-       firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
-
-       if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
-               printf("malloc failed\n");
-               exit(1);
-       }
-       memset(iftot, 0, sizeof(struct iftot));
-
+       int name[6];
+       size_t len;
+       unsigned int ifcount, i;
+       struct ifmibdata *ifmdall = 0;
+       int interesting_row;
+
+       /* Common OID prefix */
+       name[0] = CTL_NET;
+       name[1] = PF_LINK;
+       name[2] = NETLINK_GENERIC;
+
+       len = sizeof(int);
+       name[3] = IFMIB_SYSTEM;
+       name[4] = IFMIB_IFCOUNT;
+       if (sysctl(name, 5, &ifcount, &len, 0, 0) == 1)
+               err(1, "sysctl IFMIB_IFCOUNT");
+
+       len = ifcount * sizeof(struct ifmibdata);
+       ifmdall = malloc(len);
+       if (ifmdall == 0)
+               err(1, "malloc failed");
+       name[3] = IFMIB_IFALLDATA;
+       name[4] = 0;
+       name[5] = IFDATA_GENERAL;
+       if (sysctl(name, 6, ifmdall, &len, (void *)0, 0) == -1)
+               err(1, "sysctl IFMIB_IFALLDATA");
+       
        interesting = NULL;
-       interesting_off = 0;
-       for (off = firstifnet, ip = iftot; off;) {
-               char name[16], tname[16];
-
-               if (kread(off, (char *)&ifnet, sizeof ifnet))
-                       break;
-               if (kread((u_long)ifnet.if_name, tname, 16))
-                       break;
-               tname[15] = '\0';
-               snprintf(name, 16, "%s%d", tname, ifnet.if_unit);
-               if (interface && strcmp(name, interface) == 0) {
-                       interesting = ip;
-                       interesting_off = off;
-               }
-               snprintf(ip->ift_name, 16, "(%s)", name);;
-               if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
-                       printf("malloc failed\n");
-                       exit(1);
+       interesting_row = 0;
+       for (i = 0; i < ifcount; i++) {
+               struct ifmibdata *ifmd = ifmdall + i;
+       
+               if (interface && strcmp(ifmd->ifmd_name, interface) == 0) {
+                       if ((interesting = calloc(ifcount, sizeof(struct iftot))) == NULL)
+                               err(1, "malloc failed");
+                       interesting_row = i + 1;
+                       snprintf(interesting->ift_name, 16, "(%s)", ifmd->ifmd_name);;
                }
-               memset(ipn, 0, sizeof(struct iftot));
-               SLIST_NEXT(ip, chain) = ipn;
-               ip = ipn;
-               off = (u_long)TAILQ_NEXT(&ifnet, if_link);
        }
-       if ((total = malloc(sizeof(struct iftot))) == NULL) {
-               printf("malloc failed\n");
-               exit(1);
-       }
-       memset(total, 0, sizeof(struct iftot));
-       if ((sum = malloc(sizeof(struct iftot))) == NULL) {
-               printf("malloc failed\n");
-               exit(1);
-       }
-       memset(sum, 0, sizeof(struct iftot));
+       if ((total = calloc(1, sizeof(struct iftot))) == NULL)
+               err(1, "malloc failed");
+
+       if ((sum = calloc(1, sizeof(struct iftot))) == NULL)
+               err(1, "malloc failed");
 
 
        (void)signal(SIGALRM, catchalarm);
@@ -585,32 +570,61 @@ banner:
        line = 0;
 loop:
        if (interesting != NULL) {
-               ip = interesting;
-               if (kread(interesting_off, (char *)&ifnet, sizeof ifnet)) {
-                       printf("???\n");
-                       exit(1);
-               };
+               struct ifmibdata ifmd;
+               
+               len = sizeof(struct ifmibdata);
+               name[3] = IFMIB_IFDATA;
+               name[4] = interesting_row;
+               name[5] = IFDATA_GENERAL;
+               if (sysctl(name, 6, &ifmd, &len, (void *)0, 0) == -1)
+                       err(1, "sysctl IFDATA_GENERAL %d", interesting_row);
+
                if (!first) {
-                       printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
-                               ifnet.if_ipackets - ip->ift_ip,
-                               ifnet.if_ierrors - ip->ift_ie,
-                               ifnet.if_ibytes - ip->ift_ib,
-                               ifnet.if_opackets - ip->ift_op,
-                               ifnet.if_oerrors - ip->ift_oe,
-                               ifnet.if_obytes - ip->ift_ob,
-                               ifnet.if_collisions - ip->ift_co);
+                       printf("%10llu %5llu %10llu %10llu %5llu %10llu %5llu",
+                               ifmd.ifmd_data.ifi_ipackets - interesting->ift_ip,
+                               ifmd.ifmd_data.ifi_ierrors - interesting->ift_ie,
+                               ifmd.ifmd_data.ifi_ibytes - interesting->ift_ib,
+                               ifmd.ifmd_data.ifi_opackets - interesting->ift_op,
+                               ifmd.ifmd_data.ifi_oerrors - interesting->ift_oe,
+                               ifmd.ifmd_data.ifi_obytes - interesting->ift_ob,
+                               ifmd.ifmd_data.ifi_collisions - interesting->ift_co);
                        if (dflag)
-                               printf(" %5u", ifnet.if_snd.ifq_drops - ip->ift_dr);
+                               printf(" %5llu", ifmd.ifmd_snd_drops - interesting->ift_dr);
                }
-               ip->ift_ip = ifnet.if_ipackets;
-               ip->ift_ie = ifnet.if_ierrors;
-               ip->ift_ib = ifnet.if_ibytes;
-               ip->ift_op = ifnet.if_opackets;
-               ip->ift_oe = ifnet.if_oerrors;
-               ip->ift_ob = ifnet.if_obytes;
-               ip->ift_co = ifnet.if_collisions;
-               ip->ift_dr = ifnet.if_snd.ifq_drops;
+               interesting->ift_ip = ifmd.ifmd_data.ifi_ipackets;
+               interesting->ift_ie = ifmd.ifmd_data.ifi_ierrors;
+               interesting->ift_ib = ifmd.ifmd_data.ifi_ibytes;
+               interesting->ift_op = ifmd.ifmd_data.ifi_opackets;
+               interesting->ift_oe = ifmd.ifmd_data.ifi_oerrors;
+               interesting->ift_ob = ifmd.ifmd_data.ifi_obytes;
+               interesting->ift_co = ifmd.ifmd_data.ifi_collisions;
+               interesting->ift_dr = ifmd.ifmd_snd_drops;
        } else {
+               unsigned int latest_ifcount;
+               
+               len = sizeof(int);
+               name[3] = IFMIB_SYSTEM;
+               name[4] = IFMIB_IFCOUNT;
+               if (sysctl(name, 5, &latest_ifcount, &len, 0, 0) == 1)
+                       err(1, "sysctl IFMIB_IFCOUNT");
+               if (latest_ifcount > ifcount) {
+                       ifcount = latest_ifcount;
+                       len = ifcount * sizeof(struct ifmibdata);
+                       free(ifmdall);
+                       ifmdall = malloc(len);
+                       if (ifmdall == 0)
+                               err(1, "malloc failed");
+               } else if (latest_ifcount > ifcount) {
+                       ifcount = latest_ifcount;
+                       len = ifcount * sizeof(struct ifmibdata);
+               }
+               len = ifcount * sizeof(struct ifmibdata);
+               name[3] = IFMIB_IFALLDATA;
+               name[4] = 0;
+               name[5] = IFDATA_GENERAL;
+               if (sysctl(name, 6, ifmdall, &len, (void *)0, 0) == -1)
+                       err(1, "sysctl IFMIB_IFALLDATA");
+                       
                sum->ift_ip = 0;
                sum->ift_ie = 0;
                sum->ift_ib = 0;
@@ -619,25 +633,20 @@ loop:
                sum->ift_ob = 0;
                sum->ift_co = 0;
                sum->ift_dr = 0;
-               for (off = firstifnet, ip = iftot;
-                    off && SLIST_NEXT(ip, chain) != NULL;
-                    ip = SLIST_NEXT(ip, chain)) {
-                       if (kread(off, (char *)&ifnet, sizeof ifnet)) {
-                               off = 0;
-                               continue;
-                       }
-                       sum->ift_ip += ifnet.if_ipackets;
-                       sum->ift_ie += ifnet.if_ierrors;
-                       sum->ift_ib += ifnet.if_ibytes;
-                       sum->ift_op += ifnet.if_opackets;
-                       sum->ift_oe += ifnet.if_oerrors;
-                       sum->ift_ob += ifnet.if_obytes;
-                       sum->ift_co += ifnet.if_collisions;
-                       sum->ift_dr += ifnet.if_snd.ifq_drops;
-                       off = (u_long)TAILQ_NEXT(&ifnet, if_link);
+               for (i = 0; i < ifcount; i++) {
+                       struct ifmibdata *ifmd = ifmdall + i;
+                       
+                       sum->ift_ip += ifmd->ifmd_data.ifi_ipackets;
+                       sum->ift_ie += ifmd->ifmd_data.ifi_ierrors;
+                       sum->ift_ib += ifmd->ifmd_data.ifi_ibytes;
+                       sum->ift_op += ifmd->ifmd_data.ifi_opackets;
+                       sum->ift_oe += ifmd->ifmd_data.ifi_oerrors;
+                       sum->ift_ob += ifmd->ifmd_data.ifi_obytes;
+                       sum->ift_co += ifmd->ifmd_data.ifi_collisions;
+                       sum->ift_dr += ifmd->ifmd_snd_drops;
                }
                if (!first) {
-                       printf("%10lu %5lu %10lu %10lu %5lu %10lu %5lu",
+                       printf("%10llu %5llu %10llu %10llu %5llu %10llu %5llu",
                                sum->ift_ip - total->ift_ip,
                                sum->ift_ie - total->ift_ie,
                                sum->ift_ib - total->ift_ib,
@@ -646,7 +655,7 @@ loop:
                                sum->ift_ob - total->ift_ob,
                                sum->ift_co - total->ift_co);
                        if (dflag)
-                               printf(" %5u", sum->ift_dr - total->ift_dr);
+                               printf(" %5llu", sum->ift_dr - total->ift_dr);
                }
                *total = *sum;
        }