Add in a first pass at ifconfig status reporting. It took a long while
authorEric Andersen <andersen@codepoet.org>
Tue, 6 Mar 2001 00:48:59 +0000 (00:48 -0000)
committerEric Andersen <andersen@codepoet.org>
Tue, 6 Mar 2001 00:48:59 +0000 (00:48 -0000)
hacking on the mess in net-tools-1.59, but it currently adds 12k and
supports ethernet, loop, ppp, and treats everything else as a generic
interface.  Works ok for me.
 -Erik

Config.h
ifconfig.c
interface.c [new file with mode: 0644]
networking/ifconfig.c

index 3fd4831..9b9eec6 100644 (file)
--- a/Config.h
+++ b/Config.h
 // Support for Minix filesystem, version 2
 //#define BB_FEATURE_MINIX2
 //
+// Enable ifconfig status reporting output -- this feature adds 12k.
+//#define BB_FEATURE_IFCONFIG_STATUS
 //
 // Enable busybox --install [-s]
 // to create links (or symlinks) for all the commands that are 
 #endif
 #endif
 //
+#if defined BB_IFCONFIG
+#ifdef BB_FEATURE_IFCONFIG_STATUS
+#define BB_INTERFACE
+#endif
+#else
+#undef BB_INTERFACE
+#endif 
+//
 #if defined BB_FEATURE_AUTOWIDTH
 #ifndef BB_FEATURE_USE_TERMIOS
 #define BB_FEATURE_USE_TERMIOS
index a3e2c0f..2a50a96 100644 (file)
  * Foundation;  either  version 2 of the License, or  (at
  * your option) any later version.
  *
- * $Id: ifconfig.c,v 1.3 2001/02/20 06:14:07 andersen Exp $
+ * $Id: ifconfig.c,v 1.4 2001/03/06 00:48:59 andersen Exp $
+ *
+ * Majorly hacked up by Larry Doolittle <ldoolitt@recycle.lbl.gov> 
  *
  */
 
+#include "busybox.h"
+#include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>   // strcmp and friends
 #include <ctype.h>    // isdigit and friends
-#include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <netinet/in.h>
 #include <net/if.h>
 #include <net/if_arp.h>
 #include <linux/if_ether.h>
-#include "busybox.h"
 
 static int sockfd;  /* socket fd we use to manipulate stuff with */
 
+#define TESTME 0
+#if TESTME
+#define ioctl test_ioctl
+char *saddr_to_a(struct sockaddr *s)
+{
+       if (s->sa_family == ARPHRD_ETHER) {
+               static char hw[18];
+               sprintf(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
+                       s->sa_data[0], s->sa_data[1], s->sa_data[2],
+                       s->sa_data[3], s->sa_data[4], s->sa_data[5]);
+               return hw;
+       } else if (s->sa_family == AF_INET) {
+               struct sockaddr_in *ss = (struct sockaddr_in *) s;
+               return inet_ntoa(ss->sin_addr);
+       } else {
+               return NULL;
+       }
+}
+
+int test_ioctl(int __fd, unsigned long int __request, void *param)
+{
+       struct ifreq *i=(struct ifreq *)param;
+       printf("ioctl fd=%d, request=%ld\n", __fd, __request);
+       
+       switch(__request) {
+               case SIOCGIFFLAGS:   printf("  SIOCGIFFLAGS\n");       i->ifr_flags = 0;   break;
+               case SIOCSIFFLAGS:   printf("  SIOCSIFFLAGS, %x\n",    i->ifr_flags);     break;
+               case SIOCSIFMETRIC:  printf("  SIOCSIFMETRIC, %d\n",   i->ifr_metric);    break;
+               case SIOCSIFMTU:     printf("  SIOCSIFMTU, %d\n",      i->ifr_mtu);       break;
+               case SIOCSIFBRDADDR: printf("  SIOCSIFBRDADDR, %s\n",  saddr_to_a(&(i->ifr_broadaddr))); break;
+               case SIOCSIFDSTADDR: printf("  SIOCSIFDSTADDR, %s\n",  saddr_to_a(&(i->ifr_dstaddr  ))); break;
+               case SIOCSIFNETMASK: printf("  SIOCSIFNETMASK, %s\n",  saddr_to_a(&(i->ifr_netmask  ))); break;
+               case SIOCSIFADDR:    printf("  SIOCSIFADDR, %s\n",     saddr_to_a(&(i->ifr_addr     ))); break;
+               case SIOCSIFHWADDR:  printf("  SIOCSIFHWADDR, %s\n",   saddr_to_a(&(i->ifr_hwaddr   ))); break;  /* broken */
+               default:
+       }
+       return 0;
+}
+#endif
+
+
 /* print usage and exit */
 
 #define _(x) x
@@ -49,7 +92,7 @@ set_flag(char *ifname, short flag)
        strcpy(ifr.ifr_name, ifname);
        if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
                perror("SIOCGIFFLAGS"); 
-               return (-1);
+               return -1;
        }
        strcpy(ifr.ifr_name, ifname);
        ifr.ifr_flags |= flag;
@@ -57,7 +100,7 @@ set_flag(char *ifname, short flag)
                perror("SIOCSIFFLAGS");
                return -1;
        }
-       return (0);
+       return 0;
 }
 
 
@@ -78,9 +121,62 @@ clr_flag(char *ifname, short flag)
                perror("SIOCSIFFLAGS");
                return -1;
        }
-       return (0);
+       return 0;
 }
 
+/* which element in struct ifreq to frob */
+enum frob {
+       L_METRIC,
+       L_MTU,
+       L_DATA,
+       L_BROAD,
+       L_DEST,
+       L_MASK,
+       L_HWAD,
+};
+
+
+struct flag_map {
+       char *name;
+       enum frob frob;
+       int flag;
+       int sflag;
+       int action;
+};
+
+/* action:
+ *  2   set
+ *  4   clear
+ *  6   set/clear
+ *  8   clear/set
+ *  10  numeric
+ *  12  address
+ *  14  address/clear
+ */
+const static struct flag_map flag_table[] = {
+       {"arp",         0,  IFF_NOARP,             0, 6},
+       {"trailers",    0,  IFF_NOTRAILERS,        0, 6},
+       {"promisc",     0,  IFF_PROMISC,           0, 8},
+       {"multicast",   0,  IFF_MULTICAST,         0, 8},
+       {"allmulti",    0,  IFF_ALLMULTI,          0, 8},
+       {"up",          0, (IFF_UP | IFF_RUNNING), 0, 2},
+       {"down",        0,  IFF_UP,                0, 4},
+       {"metric",      L_METRIC,              0, SIOCSIFMETRIC,  10},
+       {"mtu",         L_MTU,                 0, SIOCSIFMTU,     10},
+#ifdef SIOCSKEEPALIVE
+       {"keepalive",   L_DATA,                0, SIOCSKEEPALIVE, 10},
+#endif
+#ifdef SIOCSOUTFILL
+       {"outfill",     L_DATA,                0, SIOCSOUTFILL,   10},
+#endif
+       {"broadcast",   L_BROAD, IFF_BROADCAST,   SIOCSIFBRDADDR, 14},
+       {"dstaddr",     L_DEST,                0, SIOCSIFDSTADDR, 12},
+       {"netmask",     L_MASK,                0, SIOCSIFNETMASK, 12},
+       {"pointopoint", L_DEST,  IFF_POINTOPOINT, SIOCSIFDSTADDR, 14},
+       {"hw",          L_HWAD,                0, SIOCSIFHWADDR,  14},
+};
+
+
 /* resolve XXX.YYY.ZZZ.QQQ -> binary */
 
 static int
@@ -90,15 +186,16 @@ INET_resolve(char *name, struct sockaddr_in *sin)
        sin->sin_port = 0;
 
        /* Default is special, meaning 0.0.0.0. */
-       if (!strcmp(name, "default")) {
+       if (strcmp(name, "default")==0) {
                sin->sin_addr.s_addr = INADDR_ANY;
-               return (1);
+               return 1;
        }
        /* Look to see if it's a dotted quad. */
        if (inet_aton(name, &sin->sin_addr)) {
                return 0;
        }
        /* guess not.. */
+       errno = EINVAL;
        return -1;
 }
 
@@ -127,12 +224,12 @@ in_ether(char *bufp, struct sockaddr *sap)
                        val = c - 'A' + 10;
                else {
 #ifdef DEBUG
-                       fprintf(stderr,
-                               _("in_ether(%s): invalid ether address!\n"),
+                       error_msg(
+                               _("in_ether(%s): invalid ether address!"),
                                orig);
 #endif
                        errno = EINVAL;
-                       return (-1);
+                       return -1;
                }
                val <<= 4;
                c = *bufp;
@@ -146,22 +243,19 @@ in_ether(char *bufp, struct sockaddr *sap)
                        val >>= 4;
                else {
 #ifdef DEBUG
-                       fprintf(stderr,
-                               _("in_ether(%s): invalid ether address!\n"),
+                       error_msg(
+                               _("in_ether(%s): invalid ether address!"),
                                orig);
 #endif
                        errno = EINVAL;
-                       return (-1);
+                       return -1;
                }
                if (c != 0)
                        bufp++;
                *ptr++ = (unsigned char) (val & 0377);
                i++;
                
-               /* We might get a semicolon here - not required. */
-               if (*bufp == ':')
-                       bufp++;
-               
+               /* optional colon already handled, don't swallow a second */
        }
 
        if(i != ETH_ALEN) {
@@ -171,25 +265,37 @@ in_ether(char *bufp, struct sockaddr *sap)
 
        return 0;
 }
+               
+#ifdef BB_FEATURE_IFCONFIG_STATUS
+extern int display_interfaces(void);
+#else
+int display_interfaces(void)
+{
+    show_usage();
+}
+#endif
 
 int ifconfig_main(int argc, char **argv)
 {
        struct ifreq ifr;
        struct sockaddr_in sa;
-       struct sockaddr sa2;
-       char **spp;
+       char **spp, *cmd;
        int goterr = 0;
-       int r, didnetmask = 0;
+       int r;
+       /* int didnetmask = 0;   special case input error detection no longer implemented */
        char host[128];
+       const struct flag_map *ft;
+       int i, sense;
+       int a, ecode;
+       struct sockaddr *d;
 
        if(argc < 2) {
-               show_usage();
+               return(display_interfaces());
        }
 
        /* Create a channel to the NET kernel. */
        if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-               perror("socket");
-               exit(1);
+               perror_msg_and_die("socket");
        }
 
        /* skip argv[0] */
@@ -205,235 +311,84 @@ int ifconfig_main(int argc, char **argv)
 
        /* Process the remaining arguments. */
        while (*spp != (char *) NULL) {
-               if (!strcmp(*spp, "arp")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_NOARP);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-arp")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_NOARP);
-                       spp++;
-                       continue;
-               }
-               
-               if (!strcmp(*spp, "trailers")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_NOTRAILERS);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-trailers")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_NOTRAILERS);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "promisc")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_PROMISC);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-promisc")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_PROMISC);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "multicast")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_MULTICAST);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-multicast")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_MULTICAST);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "allmulti")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_ALLMULTI);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-allmulti")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_ALLMULTI);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "up")) {
-                       goterr |= set_flag(ifr.ifr_name, (IFF_UP | IFF_RUNNING));
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "down")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_UP);
-                       spp++;
-                       continue;
-               }
-
-               if (!strcmp(*spp, "metric")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_metric = atoi(*spp);
-                       if (ioctl(sockfd, SIOCSIFMETRIC, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSIFMETRIC: %s\n", strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "mtu")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_mtu = atoi(*spp);
-                       if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSIFMTU: %s\n", strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
+               cmd = *spp;
+               sense=0;
+               if (*cmd=='-') {
+                       sense=1;
+                       cmd++;
                }
-#ifdef SIOCSKEEPALIVE
-               if (!strcmp(*spp, "keepalive")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_data = (caddr_t) atoi(*spp);
-                       if (ioctl(sockfd, SIOCSKEEPALIVE, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSKEEPALIVE: %s\n", strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-#endif
-
-#ifdef SIOCSOUTFILL
-               if (!strcmp(*spp, "outfill")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_data = (caddr_t) atoi(*spp);
-                       if (ioctl(sockfd, SIOCSOUTFILL, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSOUTFILL: %s\n", strerror(errno));
-                               goterr++;
+               ft = NULL;
+               for (i=0; i<(sizeof(flag_table)/sizeof(struct flag_map)); i++) {
+                       if (strcmp(cmd, flag_table[i].name)==0) {
+                               ft=flag_table+i;
+                               spp++;
+                               break;
                        }
-                       spp++;
-                       continue;
                }
-#endif
+               if (ft) {
+                       switch (ft->action+sense) {
+                       case 4:
+                       case 7:
+                       case 8:
+                       case 15:
+                               goterr |= clr_flag(ifr.ifr_name, ft->flag);
+                               break;
+                       case 2:
+                       case 6:
+                       case 9:
+                               goterr |= set_flag(ifr.ifr_name, ft->flag);
+                               break;
+                       case 10:
+                               if (*spp == NULL)
+                                       show_usage();
+                               a = atoi(*spp++);
+                               switch (ft->frob) {
+                                       case L_METRIC: ifr.ifr_metric = a; break;
+                                       case L_MTU:    ifr.ifr_mtu    = a; break;
+                                       case L_DATA:   ifr.ifr_data   = (caddr_t) a; break;
+                                       default: error_msg_and_die("bugaboo");
+                               }
 
-               if (!strcmp(*spp, "-broadcast")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_BROADCAST);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "broadcast")) {
-                       if (*++spp != NULL) {
-                               safe_strncpy(host, *spp, (sizeof host));
-                               if (INET_resolve(host, &sa) < 0) {
+                               if (ioctl(sockfd, ft->sflag, &ifr) < 0) {
+                                       perror(ft->name);  /* imperfect */
                                        goterr++;
-                                       spp++;
-                                       continue;
                                }
-                               memcpy((char *) &ifr.ifr_broadaddr,
-                                      (char *) &sa,
-                                      sizeof(struct sockaddr));
-                               if (ioctl(sockfd, SIOCSIFBRDADDR, &ifr) < 0) {
-                                       perror("SIOCSIFBRDADDR");
-                                       goterr++;
+                               break;
+                       case 12:
+                       case 14:
+                               if (ft->action+sense==10 && *spp == NULL) {
+                                       show_usage();
+                                       break;
                                }
-                               spp++;
-                       }
-                       goterr |= set_flag(ifr.ifr_name, IFF_BROADCAST);
-                       continue;
-               }
-               if (!strcmp(*spp, "dstaddr")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       safe_strncpy(host, *spp, (sizeof host));
-                       if (INET_resolve(host, &sa) < 0) {
-                               goterr++;
-                               spp++;
-                               continue;
-                       }
-                       memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa,
-                              sizeof(struct sockaddr));
-                       if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSIFDSTADDR: %s\n",
-                                       strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "netmask")) {
-                       if (*++spp == NULL || didnetmask)
-                               show_usage();
-                       safe_strncpy(host, *spp, (sizeof host));
-                       if (INET_resolve(host, &sa) < 0) {
-                               goterr++;
-                               spp++;
-                               continue;
-                       }
-                       didnetmask++;
-                       memcpy((char *) &ifr.ifr_netmask, (char *) &sa,
-                              sizeof(struct sockaddr));
-                       if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
-                               perror("SIOCSIFNETMASK");
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-
-               if (!strcmp(*spp, "-pointopoint")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_POINTOPOINT);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "pointopoint")) {
-                       if (*(spp + 1) != NULL) {
-                               spp++;
-                               safe_strncpy(host, *spp, (sizeof host));
-                               if (INET_resolve(host, &sa)) {
-                                       goterr++;
+                               if (*spp != NULL) {
+                                       safe_strncpy(host, *spp, (sizeof host));
                                        spp++;
-                                       continue;
+                                       if (ft->frob == L_HWAD) {
+                                               ecode = in_ether(host, &ifr.ifr_hwaddr);
+                                       } else {
+                                               switch (ft->frob) {
+                                                       case L_BROAD: d = &ifr.ifr_broadaddr; break;
+                                                       case L_DEST:  d = &ifr.ifr_dstaddr;   break;
+                                                       case L_MASK:  d = &ifr.ifr_netmask;   break;
+                                                       default: error_msg_and_die("bugaboo");
+                                               }
+                                               ecode = INET_resolve(host, (struct sockaddr_in *) d);
+                                       }
+                                       if (ecode < 0 || ioctl(sockfd, ft->sflag, &ifr) < 0) {
+                                               perror(ft->name);  /* imperfect */
+                                               goterr++;
+                                       }
                                }
-                               memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa,
-                                      sizeof(struct sockaddr));
-                               if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
-                                       perror("SIOCSIFDSTADDR");
-                                       goterr++;
+                               if (ft->flag != 0) {
+                                       goterr |= set_flag(ifr.ifr_name, ft->flag);
                                }
-                       }
-                       goterr |= set_flag(ifr.ifr_name, IFF_POINTOPOINT);
-                       spp++;
-                       continue;
-               };
-
-               if (!strcmp(*spp, "hw")) {
-                       if (*++spp == NULL || strcmp("ether", *spp)) {
+                               break;
+                       default:
                                show_usage();
-                       }
-                               
-                       if (*++spp == NULL) {
-                               /* silently ignore it if no address */
-                               continue;
-                       }
-
-                       safe_strncpy(host, *spp, (sizeof host));
-                       if (in_ether(host, &sa2) < 0) {
-                               fprintf(stderr, "invalid hw-addr %s\n", host);
-                               goterr++;
-                               spp++;
-                               continue;
-                       }
-                       memcpy((char *) &ifr.ifr_hwaddr, (char *) &sa2,
-                              sizeof(struct sockaddr));
-                       if (ioctl(sockfd, SIOCSIFHWADDR, &ifr) < 0) {
-                               perror("SIOCSIFHWADDR");
-                               goterr++;
-                       }
-                       spp++;
+                       } /* end of switch */
                        continue;
                }
-
+               
                /* If the next argument is a valid hostname, assume OK. */
                safe_strncpy(host, *spp, (sizeof host));
 
@@ -471,6 +426,6 @@ int ifconfig_main(int argc, char **argv)
 
        } /* end of while-loop */
 
-        exit(0);
+        return goterr;
 }
 
diff --git a/interface.c b/interface.c
new file mode 100644 (file)
index 0000000..05019e5
--- /dev/null
@@ -0,0 +1,2080 @@
+/*
+ * ifconfig   This file contains an implementation of the command
+ *              that either displays or sets the characteristics of
+ *              one or more of the system's networking interfaces.
+ *
+ * Version:     $Id: interface.c,v 1.1 2001/03/06 00:48:59 andersen Exp $
+ *
+ * Author:      Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
+ *              and others.  Copyright 1993 MicroWalt Corporation
+ *
+ *              This program is free software; you can redistribute it
+ *              and/or  modify it under  the terms of  the GNU General
+ *              Public  License as  published  by  the  Free  Software
+ *              Foundation;  either  version 2 of the License, or  (at
+ *              your option) any later version.
+ *
+ * Patched to support 'add' and 'del' keywords for INET(4) addresses
+ * by Mrs. Brisby <mrs.brisby@nimh.org>
+ *
+ * {1.34} - 19980630 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ *                     - gettext instead of catgets for i18n
+ *          10/1998  - Andi Kleen. Use interface list primitives.       
+ *         20001008 - Bernd Eckenfels, Patch from RH for setting mtu 
+ *                     (default AF was wrong)
+ * stolen from net-tools-1.59 and stripped down for busybox by 
+ *                     Erik Andersen <andersee@debian.org>
+ */
+
+#include "busybox.h"
+
+/* 
+ * 
+ * Protocol Families.
+ * 
+ */
+#define HAVE_AFINET 1
+#undef HAVE_AFINET6
+#undef HAVE_AFIPX
+#undef HAVE_AFATALK
+#undef HAVE_AFNETROM
+#undef HAVE_AFX25
+#undef HAVE_AFECONET
+
+/* 
+ * 
+ * Device Hardware types.
+ * 
+ */
+#define HAVE_HWETHER   1
+#define HAVE_HWPPP     1
+#undef HAVE_HWSLIP
+
+
+#include <features.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+
+#define _(x) x
+#define _PATH_PROCNET_DEV               "/proc/net/dev"
+#define new(p) ((p) = xcalloc(1,sizeof(*(p))))
+#define xmalloc malloc
+#define xcalloc calloc
+#define xrealloc realloc
+#define KRELEASE(maj,min,patch) ((maj) * 10000 + (min)*1000 + (patch))
+
+int procnetdev_vsn = 1;
+
+
+/* Ugh.  But libc5 doesn't provide POSIX types.  */
+#include <asm/types.h>
+
+
+#ifdef HAVE_HWSLIP
+#include <linux/if_slip.h>
+#endif
+
+#if HAVE_AFINET6
+
+#ifndef _LINUX_IN6_H
+/*
+ *    This is in linux/include/net/ipv6.h.
+ */
+
+struct in6_ifreq {
+    struct in6_addr ifr6_addr;
+    __u32 ifr6_prefixlen;
+    unsigned int ifr6_ifindex;
+};
+
+#endif
+
+#endif                         /* HAVE_AFINET6 */
+
+#if HAVE_AFIPX
+#if (__GLIBC__ > 2) || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1)
+#include <netipx/ipx.h>
+#else
+#include "ipx.h"
+#endif
+#endif
+#if 0
+#include "net-support.h"
+#include "pathnames.h"
+#include "version.h"
+#include "../intl.h"
+#include "interface.h"
+#include "sockets.h"
+#include "util.h"
+#endif
+
+/* This structure defines protocol families and their handlers. */
+struct aftype {
+    char *name;
+    char *title;
+    int af;
+    int alen;
+    char *(*print) (unsigned char *);
+    char *(*sprint) (struct sockaddr *, int numeric);
+    int (*input) (int type, char *bufp, struct sockaddr *);
+    void (*herror) (char *text);
+    int (*rprint) (int options);
+    int (*rinput) (int typ, int ext, char **argv);
+
+    /* may modify src */
+    int (*getmask) (char *src, struct sockaddr * mask, char *name);
+
+    int fd;
+    char *flag_file;
+};
+
+extern struct aftype *aftypes[];
+int flag_unx;
+int flag_ipx;
+int flag_ax25;
+int flag_ddp;
+int flag_netrom;
+int flag_inet;
+int flag_inet6;
+int flag_econet;
+int flag_x25 = 0;
+int flag_ash;
+
+
+struct aftrans_t {
+    char *alias;
+    char *name;
+    int *flag;
+} aftrans[] = {
+
+    {
+       "ax25", "ax25", &flag_ax25
+    },
+    {
+       "ip", "inet", &flag_inet
+    },
+    {
+       "ip6", "inet6", &flag_inet6
+    },
+    {
+       "ipx", "ipx", &flag_ipx
+    },
+    {
+       "appletalk", "ddp", &flag_ddp
+    },
+    {
+       "netrom", "netrom", &flag_netrom
+    },
+    {
+       "inet", "inet", &flag_inet
+    },
+    {
+       "inet6", "inet6", &flag_inet6
+    },
+    {
+       "ddp", "ddp", &flag_ddp
+    },
+    {
+       "unix", "unix", &flag_unx
+    },
+    {
+       "tcpip", "inet", &flag_inet
+    },
+    {
+       "econet", "ec", &flag_econet
+    },
+    {
+       "x25", "x25", &flag_x25
+    },
+    {
+        "ash", "ash", &flag_ash
+    },
+    {
+       0, 0, 0
+    }
+};
+
+char afname[256] = "";
+
+#if HAVE_AFUNIX
+
+/* Display a UNIX domain address. */
+static char *UNIX_print(unsigned char *ptr)
+{
+    return (ptr);
+}
+
+
+/* Display a UNIX domain address. */
+static char *UNIX_sprint(struct sockaddr *sap, int numeric)
+{
+    static char buf[64];
+
+    if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
+       return safe_strncpy(buf, _("[NONE SET]"), sizeof(buf));
+    return (UNIX_print(sap->sa_data));
+}
+
+
+struct aftype unix_aftype =
+{
+    "unix", NULL, /*"UNIX Domain", */ AF_UNIX, 0,
+    UNIX_print, UNIX_sprint, NULL, NULL,
+    NULL, NULL, NULL,
+    -1,
+    "/proc/net/unix"
+};
+#endif                         /* HAVE_AFUNIX */
+
+#if HAVE_AFINET
+
+extern int h_errno;             /* some netdb.h versions don't export this */
+
+/* cache */
+struct addr {
+    struct sockaddr_in addr;
+    char *name;
+    int host;
+    struct addr *next;
+};
+
+static struct addr *INET_nn = NULL;    /* addr-to-name cache           */
+
+static int INET_resolve(char *name, struct sockaddr_in *sin, int hostfirst)
+{
+    struct hostent *hp;
+    struct netent *np;
+
+    /* Grmpf. -FvK */
+    sin->sin_family = AF_INET;
+    sin->sin_port = 0;
+
+    /* Default is special, meaning 0.0.0.0. */
+    if (!strcmp(name, "default")) {
+       sin->sin_addr.s_addr = INADDR_ANY;
+       return (1);
+    }
+    /* Look to see if it's a dotted quad. */
+    if (inet_aton(name, &sin->sin_addr)) {
+       return 0;
+    }
+    /* If we expect this to be a hostname, try hostname database first */
+#ifdef DEBUG
+    if (hostfirst) fprintf (stderr, "gethostbyname (%s)\n", name);
+#endif
+    if (hostfirst && 
+       (hp = gethostbyname(name)) != (struct hostent *) NULL) {
+       memcpy((char *) &sin->sin_addr, (char *) hp->h_addr_list[0], 
+               sizeof(struct in_addr));
+       return 0;
+    }
+    /* Try the NETWORKS database to see if this is a known network. */
+#ifdef DEBUG
+    fprintf (stderr, "getnetbyname (%s)\n", name);
+#endif
+    if ((np = getnetbyname(name)) != (struct netent *) NULL) {
+       sin->sin_addr.s_addr = htonl(np->n_net);
+       return 1;
+    }
+    if (hostfirst) {
+       /* Don't try again */
+       errno = h_errno;
+       return -1;
+    }
+#ifdef DEBUG
+    res_init();
+    _res.options |= RES_DEBUG;
+#endif
+
+#ifdef DEBUG
+    fprintf (stderr, "gethostbyname (%s)\n", name);
+#endif
+    if ((hp = gethostbyname(name)) == (struct hostent *) NULL) {
+       errno = h_errno;
+       return -1;
+    }
+    memcpy((char *) &sin->sin_addr, (char *) hp->h_addr_list[0], 
+          sizeof(struct in_addr));
+
+    return 0;
+}
+
+
+/* numeric: & 0x8000: default instead of *, 
+ *         & 0x4000: host instead of net, 
+ *         & 0x0fff: don't resolve
+ */
+static int INET_rresolve(char *name, size_t len, struct sockaddr_in *sin, 
+                        int numeric, unsigned int netmask)
+{
+    struct hostent *ent;
+    struct netent *np;
+    struct addr *pn;
+    unsigned long ad, host_ad;
+    int host = 0;
+
+    /* Grmpf. -FvK */
+    if (sin->sin_family != AF_INET) {
+#ifdef DEBUG
+       fprintf(stderr, _("rresolve: unsupport address family %d !\n"), sin->sin_family);
+#endif
+       errno = EAFNOSUPPORT;
+       return (-1);
+    }
+    ad = (unsigned long) sin->sin_addr.s_addr;
+#ifdef DEBUG
+    fprintf (stderr, "rresolve: %08lx, mask %08x, num %08x \n", ad, netmask, numeric);
+#endif
+    if (ad == INADDR_ANY) {
+       if ((numeric & 0x0FFF) == 0) {
+           if (numeric & 0x8000)
+               safe_strncpy(name, "default", len);
+           else
+               safe_strncpy(name, "*", len);
+           return (0);
+       }
+    }
+    if (numeric & 0x0FFF) {
+        safe_strncpy(name, inet_ntoa(sin->sin_addr), len);
+       return (0);
+    }
+
+    if ((ad & (~netmask)) != 0 || (numeric & 0x4000))
+       host = 1;
+#if 0
+    INET_nn = NULL;
+#endif
+    pn = INET_nn;
+    while (pn != NULL) {
+       if (pn->addr.sin_addr.s_addr == ad && pn->host == host) {
+           safe_strncpy(name, pn->name, len);
+#ifdef DEBUG
+           fprintf (stderr, "rresolve: found %s %08lx in cache\n", (host? "host": "net"), ad);
+#endif
+           return (0);
+       }
+       pn = pn->next;
+    }
+
+    host_ad = ntohl(ad);
+    np = NULL;
+    ent = NULL;
+    if (host) {
+#ifdef DEBUG
+       fprintf (stderr, "gethostbyaddr (%08lx)\n", ad);
+#endif
+       ent = gethostbyaddr((char *) &ad, 4, AF_INET);
+       if (ent != NULL)
+           safe_strncpy(name, ent->h_name, len);
+    } else {
+#ifdef DEBUG
+       fprintf (stderr, "getnetbyaddr (%08lx)\n", host_ad);
+#endif
+       np = getnetbyaddr(host_ad, AF_INET);
+       if (np != NULL)
+           safe_strncpy(name, np->n_name, len);
+    }
+    if ((ent == NULL) && (np == NULL))
+       safe_strncpy(name, inet_ntoa(sin->sin_addr), len);
+    pn = (struct addr *) malloc(sizeof(struct addr));
+    pn->addr = *sin;
+    pn->next = INET_nn;
+    pn->host = host;
+    pn->name = (char *) malloc(strlen(name) + 1);
+    strcpy(pn->name, name);
+    INET_nn = pn;
+
+    return (0);
+}
+
+
+static void INET_reserror(char *text)
+{
+    herror(text);
+}
+
+
+/* Display an Internet socket address. */
+static char *INET_print(unsigned char *ptr)
+{
+    return (inet_ntoa((*(struct in_addr *) ptr)));
+}
+
+
+/* Display an Internet socket address. */
+static char *INET_sprint(struct sockaddr *sap, int numeric)
+{
+    static char buff[128];
+
+    if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
+       return safe_strncpy(buff, _("[NONE SET]"), sizeof(buff));
+
+    if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap, 
+                     numeric, 0xffffff00) != 0)
+       return (NULL);
+
+    return (buff);
+}
+
+char *INET_sprintmask(struct sockaddr *sap, int numeric, 
+                     unsigned int netmask)
+{
+    static char buff[128];
+
+    if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
+       return safe_strncpy(buff, _("[NONE SET]"), sizeof(buff));
+    if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap, 
+                     numeric, netmask) != 0)
+       return (NULL);
+    return (buff);
+}
+
+
+static int INET_getsock(char *bufp, struct sockaddr *sap)
+{
+    char *sp = bufp, *bp;
+    unsigned int i;
+    unsigned val;
+    struct sockaddr_in *sin;
+
+    sin = (struct sockaddr_in *) sap;
+    sin->sin_family = AF_INET;
+    sin->sin_port = 0;
+
+    val = 0;
+    bp = (char *) &val;
+    for (i = 0; i < sizeof(sin->sin_addr.s_addr); i++) {
+       *sp = toupper(*sp);
+
+       if ((*sp >= 'A') && (*sp <= 'F'))
+           bp[i] |= (int) (*sp - 'A') + 10;
+       else if ((*sp >= '0') && (*sp <= '9'))
+           bp[i] |= (int) (*sp - '0');
+       else
+           return (-1);
+
+       bp[i] <<= 4;
+       sp++;
+       *sp = toupper(*sp);
+
+       if ((*sp >= 'A') && (*sp <= 'F'))
+           bp[i] |= (int) (*sp - 'A') + 10;
+       else if ((*sp >= '0') && (*sp <= '9'))
+           bp[i] |= (int) (*sp - '0');
+       else
+           return (-1);
+
+       sp++;
+    }
+    sin->sin_addr.s_addr = htonl(val);
+
+    return (sp - bufp);
+}
+
+static int INET_input(int type, char *bufp, struct sockaddr *sap)
+{
+    switch (type) {
+    case 1:
+       return (INET_getsock(bufp, sap));
+    case 256:
+       return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
+    default:
+       return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
+    }
+}
+
+static int INET_getnetmask(char *adr, struct sockaddr *m, char *name)
+{
+    struct sockaddr_in *mask = (struct sockaddr_in *) m;
+    char *slash, *end;
+    int prefix;
+
+    if ((slash = strchr(adr, '/')) == NULL)
+       return 0;
+
+    *slash++ = '\0';
+    prefix = strtoul(slash, &end, 0);
+    if (*end != '\0')
+       return -1;
+
+    if (name) {
+       sprintf(name, "/%d", prefix);
+    }
+    mask->sin_family = AF_INET;
+    mask->sin_addr.s_addr = htonl(~(0xffffffffU >> prefix));
+    return 1;
+}
+
+
+struct aftype inet_aftype =
+{
+    "inet", NULL, /*"DARPA Internet", */ AF_INET, sizeof(unsigned long),
+    INET_print, INET_sprint, INET_input, INET_reserror,
+    NULL /*INET_rprint */ , NULL /*INET_rinput */ ,
+    INET_getnetmask,
+    -1,
+    NULL
+};
+
+#endif                         /* HAVE_AFINET */
+
+/* Display an UNSPEC address. */
+static char *UNSPEC_print(unsigned char *ptr)
+{
+    static char buff[64];
+    char *pos;
+    unsigned int i;
+
+    pos = buff;
+    for (i = 0; i < sizeof(struct sockaddr); i++) {
+       pos += sprintf(pos, "%02X-", (*ptr++ & 0377));
+    }
+    buff[strlen(buff) - 1] = '\0';
+    return (buff);
+}
+
+/* Display an UNSPEC socket address. */
+static char *UNSPEC_sprint(struct sockaddr *sap, int numeric)
+{
+    static char buf[64];
+
+    if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
+       return safe_strncpy(buf, _("[NONE SET]"), sizeof(buf));
+    return (UNSPEC_print(sap->sa_data));
+}
+
+struct aftype unspec_aftype =
+{
+    "unspec", NULL, /*"UNSPEC", */ AF_UNSPEC, 0,
+    UNSPEC_print, UNSPEC_sprint, NULL, NULL,
+    NULL,
+};
+
+static short sVafinit = 0;
+
+struct aftype *aftypes[] =
+{
+#if HAVE_AFUNIX
+    &unix_aftype,
+#endif
+#if HAVE_AFINET
+    &inet_aftype,
+#endif
+#if HAVE_AFINET6
+    &inet6_aftype,
+#endif
+#if HAVE_AFAX25
+    &ax25_aftype,
+#endif
+#if HAVE_AFNETROM
+    &netrom_aftype,
+#endif
+#if HAVE_AFROSE
+    &rose_aftype,
+#endif
+#if HAVE_AFIPX
+    &ipx_aftype,
+#endif
+#if HAVE_AFATALK
+    &ddp_aftype,
+#endif
+#if HAVE_AFECONET
+    &ec_aftype,
+#endif
+#if HAVE_AFASH
+    &ash_aftype,
+#endif
+#if HAVE_AFX25
+    &x25_aftype,
+#endif
+    &unspec_aftype,
+    NULL
+};
+
+void afinit()
+{
+    unspec_aftype.title = _("UNSPEC");
+#if HAVE_AFUNIX
+    unix_aftype.title = _("UNIX Domain");
+#endif
+#if HAVE_AFINET
+    inet_aftype.title = _("DARPA Internet");
+#endif
+#if HAVE_AFINET6
+    inet6_aftype.title = _("IPv6");
+#endif
+#if HAVE_AFAX25
+    ax25_aftype.title = _("AMPR AX.25");
+#endif
+#if HAVE_AFNETROM
+    netrom_aftype.title = _("AMPR NET/ROM");
+#endif
+#if HAVE_AFIPX
+    ipx_aftype.title = _("Novell IPX");
+#endif
+#if HAVE_AFATALK
+    ddp_aftype.title = _("Appletalk DDP");
+#endif
+#if HAVE_AFECONET
+    ec_aftype.title = _("Econet");
+#endif
+#if HAVE_AFX25
+    x25_aftype.title = _("CCITT X.25");
+#endif
+#if HAVE_AFROSE
+    rose_aftype.title = _("AMPR ROSE");
+#endif
+#if HAVE_AFASH
+    ash_aftype.title = _("Ash");
+#endif 
+    sVafinit = 1;
+}
+
+int aftrans_opt(const char *arg)
+{
+    struct aftrans_t *paft;
+    char *tmp1, *tmp2;
+    char buf[256];
+
+    safe_strncpy(buf, arg, sizeof(buf));
+
+    tmp1 = buf;
+
+    while (tmp1) {
+
+       tmp2 = index(tmp1, ',');
+
+       if (tmp2)
+           *(tmp2++) = '\0';
+
+       paft = aftrans;
+       for (paft = aftrans; paft->alias; paft++) {
+           if (strcmp(tmp1, paft->alias))
+               continue;
+           if (strlen(paft->name) + strlen(afname) + 1 >= sizeof(afname)) {
+               fprintf(stderr, _("Too much address family arguments.\n"));
+               return (0);
+           }
+           if (paft->flag)
+               (*paft->flag)++;
+           if (afname[0])
+               strcat(afname, ",");
+           strcat(afname, paft->name);
+           break;
+       }
+       if (!paft->alias) {
+           fprintf(stderr, _("Unknown address family `%s'.\n"), tmp1);
+           return (1);
+       }
+       tmp1 = tmp2;
+    }
+
+    return (0);
+}
+
+/* set the default AF list from the program name or a constant value    */
+void aftrans_def(char *tool, char *argv0, char *dflt)
+{
+    char *tmp;
+    char *buf;
+
+    strcpy(afname, dflt);
+
+    if (!(tmp = strrchr(argv0, '/')))
+       tmp = argv0;            /* no slash?! */
+    else
+       tmp++;
+
+    if (!(buf = strdup(tmp)))
+       return;
+
+    if (strlen(tool) >= strlen(tmp)) {
+       free(buf);
+       return;
+    }
+    tmp = buf + (strlen(tmp) - strlen(tool));
+
+    if (strcmp(tmp, tool) != 0) {
+       free(buf);
+       return;
+    }
+    *tmp = '\0';
+    if ((tmp = strchr(buf, '_')))
+       *tmp = '\0';
+
+    afname[0] = '\0';
+    if (aftrans_opt(buf))
+       strcpy(afname, buf);
+
+    free(buf);
+}
+
+
+/* Check our protocol family table for this family. */
+struct aftype *get_aftype(const char *name)
+{
+    struct aftype **afp;
+
+    if (!sVafinit)
+       afinit();
+
+    afp = aftypes;
+    while (*afp != NULL) {
+       if (!strcmp((*afp)->name, name))
+           return (*afp);
+       afp++;
+    }
+    if (index(name, ','))
+       fprintf(stderr, _("Please don't supply more than one address family.\n"));
+    return (NULL);
+}
+
+
+/* Check our protocol family table for this family. */
+struct aftype *get_afntype(int af)
+{
+    struct aftype **afp;
+
+    if (!sVafinit)
+       afinit();
+
+    afp = aftypes;
+    while (*afp != NULL) {
+       if ((*afp)->af == af)
+           return (*afp);
+       afp++;
+    }
+    return (NULL);
+}
+
+/* Check our protocol family table for this family and return its socket */
+int get_socket_for_af(int af)
+{
+    struct aftype **afp;
+
+    if (!sVafinit)
+       afinit();
+
+    afp = aftypes;
+    while (*afp != NULL) {
+       if ((*afp)->af == af)
+           return (*afp)->fd;
+       afp++;
+    }
+    return -1;
+}
+
+/* type: 0=all, 1=getroute */
+void print_aflist(int type) {
+    int count = 0;
+    char * txt;
+    struct aftype **afp;
+
+    if (!sVafinit)
+       afinit();
+
+    afp = aftypes;
+    while (*afp != NULL) {
+       if ((type == 1 && ((*afp)->rprint == NULL)) || ((*afp)->af == 0)) {
+               afp++; continue;
+       }
+       if ((count % 3) == 0) fprintf(stderr,count?"\n    ":"    "); 
+        txt = (*afp)->name; if (!txt) txt = "..";
+       fprintf(stderr,"%s (%s) ",txt,(*afp)->title);
+       count++;
+       afp++;
+    }
+    fprintf(stderr,"\n");
+}
+
+struct user_net_device_stats {
+    unsigned long long rx_packets;     /* total packets received       */
+    unsigned long long tx_packets;     /* total packets transmitted    */
+    unsigned long long rx_bytes;       /* total bytes received         */
+    unsigned long long tx_bytes;       /* total bytes transmitted      */
+    unsigned long rx_errors;   /* bad packets received         */
+    unsigned long tx_errors;   /* packet transmit problems     */
+    unsigned long rx_dropped;  /* no space in linux buffers    */
+    unsigned long tx_dropped;  /* no space available in linux  */
+    unsigned long rx_multicast;        /* multicast packets received   */
+    unsigned long rx_compressed;
+    unsigned long tx_compressed;
+    unsigned long collisions;
+
+    /* detailed rx_errors: */
+    unsigned long rx_length_errors;
+    unsigned long rx_over_errors;      /* receiver ring buff overflow  */
+    unsigned long rx_crc_errors;       /* recved pkt with crc error    */
+    unsigned long rx_frame_errors;     /* recv'd frame alignment error */
+    unsigned long rx_fifo_errors;      /* recv'r fifo overrun          */
+    unsigned long rx_missed_errors;    /* receiver missed packet     */
+    /* detailed tx_errors */
+    unsigned long tx_aborted_errors;
+    unsigned long tx_carrier_errors;
+    unsigned long tx_fifo_errors;
+    unsigned long tx_heartbeat_errors;
+    unsigned long tx_window_errors;
+};
+
+struct interface {
+    struct interface *next, *prev; 
+    char name[IFNAMSIZ];       /* interface name        */
+    short type;                        /* if type               */
+    short flags;               /* various flags         */
+    int metric;                        /* routing metric        */
+    int mtu;                   /* MTU value             */
+    int tx_queue_len;          /* transmit queue length */
+    struct ifmap map;          /* hardware setup        */
+    struct sockaddr addr;      /* IP address            */
+    struct sockaddr dstaddr;   /* P-P IP address        */
+    struct sockaddr broadaddr; /* IP broadcast address  */
+    struct sockaddr netmask;   /* IP network mask       */
+    struct sockaddr ipxaddr_bb;        /* IPX network address   */
+    struct sockaddr ipxaddr_sn;        /* IPX network address   */
+    struct sockaddr ipxaddr_e3;        /* IPX network address   */
+    struct sockaddr ipxaddr_e2;        /* IPX network address   */
+    struct sockaddr ddpaddr;   /* Appletalk DDP address */
+    struct sockaddr ecaddr;    /* Econet address        */
+    int has_ip;
+    int has_ipx_bb;
+    int has_ipx_sn;
+    int has_ipx_e3;
+    int has_ipx_e2;
+    int has_ax25;
+    int has_ddp;
+    int has_econet;
+    char hwaddr[32];           /* HW address            */
+    int statistics_valid;
+    struct user_net_device_stats stats;                /* statistics            */
+    int keepalive;             /* keepalive value for SLIP */
+    int outfill;               /* outfill value for SLIP */
+};
+
+
+int opt_a = 0;                 /* show all interfaces          */
+int opt_i = 0;                 /* show the statistics          */
+int opt_v = 0;                 /* debugging output flag        */
+
+int addr_family = 0;           /* currently selected AF        */
+static struct interface *int_list, *int_last;
+int skfd = -1;                 /* generic raw socket desc.     */
+
+
+int sockets_open(int family)
+{
+    struct aftype **aft;
+    int sfd = -1;
+    static int force = -1;
+
+    if (force < 0) {
+       force = 0;
+       if (get_kernel_revision() < KRELEASE(2, 1, 0))
+           force = 1;
+       if (access("/proc/net", R_OK))
+           force = 1;
+    }
+    for (aft = aftypes; *aft; aft++) {
+       struct aftype *af = *aft;
+       int type = SOCK_DGRAM;
+       if (af->af == AF_UNSPEC)
+           continue;
+       if (family && family != af->af)
+           continue;
+       if (af->fd != -1) {
+           sfd = af->fd;
+           continue;
+       }
+       /* Check some /proc file first to not stress kmod */
+       if (!family && !force && af->flag_file) {
+           if (access(af->flag_file, R_OK))
+               continue;
+       }
+#if HAVE_AFNETROM
+       if (af->af == AF_NETROM)
+           type = SOCK_SEQPACKET;
+#endif
+#if HAVE_AFX25
+       if (af->af == AF_X25)
+           type = SOCK_SEQPACKET;
+#endif
+       af->fd = socket(af->af, type, 0);
+       if (af->fd >= 0)
+           sfd = af->fd;
+    }
+    if (sfd < 0)
+       fprintf(stderr, _("No usable address families found.\n"));
+    return sfd;
+}
+
+/* like strcmp(), but knows about numbers */
+int nstrcmp(const char *astr, const char *b)
+{
+    const char *a = astr;
+
+    while (*a == *b) {
+       if (*a == '\0')
+           return 0;
+       a++;
+       b++;
+    }
+    if (isdigit(*a)) {
+       if (!isdigit(*b))
+           return -1;
+       while (a > astr) {
+           a--;
+           if (!isdigit(*a)) {
+               a++;
+               break;
+           }
+           if (!isdigit(*b))
+               return -1;
+           b--;
+       }
+       return atoi(a) > atoi(b) ? 1 : -1;
+    }
+    return *a - *b;
+}
+
+static struct interface *add_interface(char *name)
+{
+    struct interface *ife, **nextp, *new;
+
+    for (ife = int_last; ife; ife = ife->prev) {
+           int n = nstrcmp(ife->name, name); 
+           if (n == 0) 
+                   return ife; 
+           if (n < 0) 
+                   break; 
+    }
+    new(new); 
+    safe_strncpy(new->name, name, IFNAMSIZ); 
+    nextp = ife ? &ife->next : &int_list;
+    new->prev = ife;
+    new->next = *nextp; 
+    if (new->next) 
+           new->next->prev = new; 
+    else
+           int_last = new; 
+    *nextp = new; 
+    return new; 
+}
+
+
+static int if_readconf(void)
+{
+    int numreqs = 30;
+    struct ifconf ifc;
+    struct ifreq *ifr;
+    int n, err = -1;
+    int skfd;
+
+    /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
+       (as of 2.1.128) */ 
+    skfd = get_socket_for_af(AF_INET);
+    if (skfd < 0) {
+       fprintf(stderr, _("warning: no inet socket available: %s\n"),
+               strerror(errno));
+       /* Try to soldier on with whatever socket we can get hold of.  */
+       skfd = sockets_open(0);
+       if (skfd < 0)
+           return -1;
+    }
+
+    ifc.ifc_buf = NULL;
+    for (;;) {
+       ifc.ifc_len = sizeof(struct ifreq) * numreqs;
+       ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
+
+       if (ioctl(skfd, SIOCGIFCONF, &ifc) < 0) {
+           perror("SIOCGIFCONF");
+           goto out;
+       }
+       if (ifc.ifc_len == sizeof(struct ifreq) * numreqs) {
+           /* assume it overflowed and try again */
+           numreqs += 10;
+           continue;
+       }
+       break;
+    }
+
+    ifr = ifc.ifc_req;
+    for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
+       add_interface(ifr->ifr_name);
+       ifr++;
+    }
+    err = 0;
+
+out:
+    free(ifc.ifc_buf);
+    return err;
+}
+
+static char *get_name(char *name, char *p)
+{
+    while (isspace(*p))
+       p++;
+    while (*p) {
+       if (isspace(*p))
+           break;
+       if (*p == ':') {        /* could be an alias */
+           char *dot = p, *dotname = name;
+           *name++ = *p++;
+           while (isdigit(*p))
+               *name++ = *p++;
+           if (*p != ':') {    /* it wasn't, backup */
+               p = dot;
+               name = dotname;
+           }
+           if (*p == '\0')
+               return NULL;
+           p++;
+           break;
+       }
+       *name++ = *p++;
+    }
+    *name++ = '\0';
+    return p;
+}
+
+static int get_dev_fields(char *bp, struct interface *ife)
+{
+    switch (procnetdev_vsn) {
+    case 3:
+       sscanf(bp,
+       "%llu %llu %lu %lu %lu %lu %lu %lu %llu %llu %lu %lu %lu %lu %lu %lu",
+              &ife->stats.rx_bytes,
+              &ife->stats.rx_packets,
+              &ife->stats.rx_errors,
+              &ife->stats.rx_dropped,
+              &ife->stats.rx_fifo_errors,
+              &ife->stats.rx_frame_errors,
+              &ife->stats.rx_compressed,
+              &ife->stats.rx_multicast,
+
+              &ife->stats.tx_bytes,
+              &ife->stats.tx_packets,
+              &ife->stats.tx_errors,
+              &ife->stats.tx_dropped,
+              &ife->stats.tx_fifo_errors,
+              &ife->stats.collisions,
+              &ife->stats.tx_carrier_errors,
+              &ife->stats.tx_compressed);
+       break;
+    case 2:
+       sscanf(bp, "%llu %llu %lu %lu %lu %lu %llu %llu %lu %lu %lu %lu %lu",
+              &ife->stats.rx_bytes,
+              &ife->stats.rx_packets,
+              &ife->stats.rx_errors,
+              &ife->stats.rx_dropped,
+              &ife->stats.rx_fifo_errors,
+              &ife->stats.rx_frame_errors,
+
+              &ife->stats.tx_bytes,
+              &ife->stats.tx_packets,
+              &ife->stats.tx_errors,
+              &ife->stats.tx_dropped,
+              &ife->stats.tx_fifo_errors,
+              &ife->stats.collisions,
+              &ife->stats.tx_carrier_errors);
+       ife->stats.rx_multicast = 0;
+       break;
+    case 1:
+       sscanf(bp, "%llu %lu %lu %lu %lu %llu %lu %lu %lu %lu %lu",
+              &ife->stats.rx_packets,
+              &ife->stats.rx_errors,
+              &ife->stats.rx_dropped,
+              &ife->stats.rx_fifo_errors,
+              &ife->stats.rx_frame_errors,
+
+              &ife->stats.tx_packets,
+              &ife->stats.tx_errors,
+              &ife->stats.tx_dropped,
+              &ife->stats.tx_fifo_errors,
+              &ife->stats.collisions,
+              &ife->stats.tx_carrier_errors);
+       ife->stats.rx_bytes = 0;
+       ife->stats.tx_bytes = 0;
+       ife->stats.rx_multicast = 0;
+       break;
+    }
+    return 0;
+}
+
+static int procnetdev_version(char *buf)
+{
+    if (strstr(buf, "compressed"))
+       return 3;
+    if (strstr(buf, "bytes"))
+       return 2;
+    return 1;
+}
+
+static int if_readlist_proc(char *target)
+{
+    static int proc_read; 
+    FILE *fh;
+    char buf[512];
+    struct interface *ife;
+    int err;
+
+    if (proc_read) 
+           return 0; 
+    if (!target) 
+           proc_read = 1;
+
+    fh = fopen(_PATH_PROCNET_DEV, "r");
+    if (!fh) {
+               fprintf(stderr, _("Warning: cannot open %s (%s). Limited output.\n"),
+                       _PATH_PROCNET_DEV, strerror(errno)); 
+               return if_readconf();
+       }       
+    fgets(buf, sizeof buf, fh);        /* eat line */
+    fgets(buf, sizeof buf, fh);
+
+#if 0                          /* pretty, but can't cope with missing fields */
+    fmt = proc_gen_fmt(_PATH_PROCNET_DEV, 1, fh,
+                      "face", "",      /* parsed separately */
+                      "bytes", "%lu",
+                      "packets", "%lu",
+                      "errs", "%lu",
+                      "drop", "%lu",
+                      "fifo", "%lu",
+                      "frame", "%lu",
+                      "compressed", "%lu",
+                      "multicast", "%lu",
+                      "bytes", "%lu",
+                      "packets", "%lu",
+                      "errs", "%lu",
+                      "drop", "%lu",
+                      "fifo", "%lu",
+                      "colls", "%lu",
+                      "carrier", "%lu",
+                      "compressed", "%lu",
+                      NULL);
+    if (!fmt)
+       return -1;
+#else
+    procnetdev_vsn = procnetdev_version(buf);
+#endif
+
+    err = 0;
+    while (fgets(buf, sizeof buf, fh)) {
+       char *s, name[IFNAMSIZ];
+       s = get_name(name, buf);    
+       ife = add_interface(name);
+       get_dev_fields(s, ife);
+       ife->statistics_valid = 1;
+       if (target && !strcmp(target,name))
+               break;
+    }
+    if (ferror(fh)) {
+       perror(_PATH_PROCNET_DEV);
+       err = -1;
+       proc_read = 0; 
+    }
+
+#if 0
+    free(fmt);
+#endif
+    fclose(fh);
+    return err;
+}
+
+int if_readlist(void) 
+{ 
+    int err = if_readlist_proc(NULL); 
+    if (!err)
+           err = if_readconf();
+    return err;
+} 
+
+int for_all_interfaces(int (*doit) (struct interface *, void *), void *cookie)
+{
+    struct interface *ife;
+
+    if (!int_list && (if_readlist() < 0))
+       return -1;
+    for (ife = int_list; ife; ife = ife->next) {
+       int err = doit(ife, cookie);
+       if (err)
+           return err;
+    }
+    return 0;
+}
+
+/* Support for fetching an IPX address */
+
+#if HAVE_AFIPX
+static int ipx_getaddr(int sock, int ft, struct ifreq *ifr)
+{
+    ((struct sockaddr_ipx *) &ifr->ifr_addr)->sipx_type = ft;
+    return ioctl(sock, SIOCGIFADDR, ifr);
+}
+#endif
+
+
+/* Fetch the interface configuration from the kernel. */
+int if_fetch(struct interface *ife)
+{
+    struct ifreq ifr;
+    int fd;
+    char *ifname = ife->name; 
+
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
+       return (-1);
+    ife->flags = ifr.ifr_flags;
+
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
+       memset(ife->hwaddr, 0, 32);
+    else
+       memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
+
+    ife->type = ifr.ifr_hwaddr.sa_family;
+
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0)
+       ife->metric = 0;
+    else
+       ife->metric = ifr.ifr_metric;
+
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
+       ife->mtu = 0;
+    else
+       ife->mtu = ifr.ifr_mtu;
+
+#ifdef HAVE_HWSLIP
+    if (ife->type == ARPHRD_SLIP || ife->type == ARPHRD_CSLIP ||
+       ife->type == ARPHRD_SLIP6 || ife->type == ARPHRD_CSLIP6 ||
+       ife->type == ARPHRD_ADAPT) {
+#ifdef SIOCGOUTFILL
+       strcpy(ifr.ifr_name, ifname);
+       if (ioctl(skfd, SIOCGOUTFILL, &ifr) < 0)
+           ife->outfill = 0;
+       else
+           ife->outfill = (unsigned int) ifr.ifr_data;
+#endif
+#ifdef SIOCGKEEPALIVE
+       strcpy(ifr.ifr_name, ifname);
+       if (ioctl(skfd, SIOCGKEEPALIVE, &ifr) < 0)
+           ife->keepalive = 0;
+       else
+           ife->keepalive = (unsigned int) ifr.ifr_data;
+#endif
+    }
+#endif
+
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFMAP, &ifr) < 0)
+       memset(&ife->map, 0, sizeof(struct ifmap));
+    else
+       memcpy(&ife->map, &ifr.ifr_map, sizeof(struct ifmap));
+
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFMAP, &ifr) < 0)
+       memset(&ife->map, 0, sizeof(struct ifmap));
+    else
+       ife->map = ifr.ifr_map;
+
+#ifdef HAVE_TXQUEUELEN
+    strcpy(ifr.ifr_name, ifname);
+    if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) < 0)
+       ife->tx_queue_len = -1; /* unknown value */
+    else
+       ife->tx_queue_len = ifr.ifr_qlen;
+#else
+    ife->tx_queue_len = -1;    /* unknown value */
+#endif
+
+#if HAVE_AFINET
+    /* IPv4 address? */
+    fd = get_socket_for_af(AF_INET);
+    if (fd >= 0) {
+       strcpy(ifr.ifr_name, ifname);
+       ifr.ifr_addr.sa_family = AF_INET;
+       if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+           ife->has_ip = 1;
+           ife->addr = ifr.ifr_addr;
+           strcpy(ifr.ifr_name, ifname);
+           if (ioctl(fd, SIOCGIFDSTADDR, &ifr) < 0)
+               memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
+           else
+               ife->dstaddr = ifr.ifr_dstaddr;
+
+           strcpy(ifr.ifr_name, ifname);
+           if (ioctl(fd, SIOCGIFBRDADDR, &ifr) < 0)
+               memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
+           else
+               ife->broadaddr = ifr.ifr_broadaddr;
+
+           strcpy(ifr.ifr_name, ifname);
+           if (ioctl(fd, SIOCGIFNETMASK, &ifr) < 0)
+               memset(&ife->netmask, 0, sizeof(struct sockaddr));
+           else
+               ife->netmask = ifr.ifr_netmask;
+       } else
+           memset(&ife->addr, 0, sizeof(struct sockaddr));
+    }
+#endif
+
+#if HAVE_AFATALK
+    /* DDP address maybe ? */
+    fd = get_socket_for_af(AF_APPLETALK);
+    if (fd >= 0) {
+       strcpy(ifr.ifr_name, ifname);
+       if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+           ife->ddpaddr = ifr.ifr_addr;
+           ife->has_ddp = 1;
+       }
+    }
+#endif
+
+#if HAVE_AFIPX
+    /* Look for IPX addresses with all framing types */
+    fd = get_socket_for_af(AF_IPX);
+    if (fd >= 0) {
+       strcpy(ifr.ifr_name, ifname);
+       if (!ipx_getaddr(fd, IPX_FRAME_ETHERII, &ifr)) {
+           ife->has_ipx_bb = 1;
+           ife->ipxaddr_bb = ifr.ifr_addr;
+       }
+       strcpy(ifr.ifr_name, ifname);
+       if (!ipx_getaddr(fd, IPX_FRAME_SNAP, &ifr)) {
+           ife->has_ipx_sn = 1;
+           ife->ipxaddr_sn = ifr.ifr_addr;
+       }
+       strcpy(ifr.ifr_name, ifname);
+       if (!ipx_getaddr(fd, IPX_FRAME_8023, &ifr)) {
+           ife->has_ipx_e3 = 1;
+           ife->ipxaddr_e3 = ifr.ifr_addr;
+       }
+       strcpy(ifr.ifr_name, ifname);
+       if (!ipx_getaddr(fd, IPX_FRAME_8022, &ifr)) {
+           ife->has_ipx_e2 = 1;
+           ife->ipxaddr_e2 = ifr.ifr_addr;
+       }
+    }
+#endif
+
+#if HAVE_AFECONET
+    /* Econet address maybe? */
+    fd = get_socket_for_af(AF_ECONET);
+    if (fd >= 0) {
+       strcpy(ifr.ifr_name, ifname);
+       if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
+           ife->ecaddr = ifr.ifr_addr;
+           ife->has_econet = 1;
+       }
+    }
+#endif
+
+    return 0;
+}
+
+
+int do_if_fetch(struct interface *ife)
+{ 
+    if (if_fetch(ife) < 0) {
+       char *errmsg; 
+       if (errno == ENODEV) { 
+           /* Give better error message for this case. */ 
+           errmsg = _("Device not found"); 
+       } else { 
+           errmsg = strerror(errno); 
+       }
+       fprintf(stderr, _("%s: error fetching interface information: %s\n"),
+               ife->name, errmsg);
+       return -1;
+    }
+    return 0; 
+}
+
+/* This structure defines hardware protocols and their handlers. */
+struct hwtype {
+    char *name;
+    char *title;
+    int type;
+    int alen;
+    char *(*print) (unsigned char *);
+    int (*input) (char *, struct sockaddr *);
+    int (*activate) (int fd);
+    int suppress_null_addr;
+};
+
+/* Display an UNSPEC address. */
+static char *pr_unspec(unsigned char *ptr)
+{
+    static char buff[64];
+    char *pos;
+    unsigned int i;
+
+    pos = buff;
+    for (i = 0; i < sizeof(struct sockaddr); i++) {
+       pos += sprintf(pos, "%02X-", (*ptr++ & 0377));
+    }
+    buff[strlen(buff) - 1] = '\0';
+    return (buff);
+}
+
+struct hwtype unspec_hwtype =
+{
+    "unspec", NULL, /*"UNSPEC", */ -1, 0,
+    pr_unspec, NULL, NULL
+};
+
+struct hwtype loop_hwtype =
+{
+    "loop", NULL, /*"Local Loopback", */ ARPHRD_LOOPBACK, 0,
+    NULL, NULL, NULL
+};
+
+#if HAVE_HWETHER
+#include <net/if_arp.h>
+#include <linux/if_ether.h>
+
+extern struct hwtype ether_hwtype;
+
+/* Display an Ethernet address in readable format. */
+static char *pr_ether(unsigned char *ptr)
+{
+    static char buff[64];
+
+    snprintf(buff, sizeof(buff), "%02X:%02X:%02X:%02X:%02X:%02X",
+            (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
+            (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
+       );
+    return (buff);
+}
+
+
+/* Input an Ethernet address and convert to binary. */
+static int in_ether(char *bufp, struct sockaddr *sap)
+{
+    unsigned char *ptr;
+    char c, *orig;
+    int i;
+    unsigned val;
+
+    sap->sa_family = ether_hwtype.type;
+    ptr = sap->sa_data;
+
+    i = 0;
+    orig = bufp;
+    while ((*bufp != '\0') && (i < ETH_ALEN)) {
+       val = 0;
+       c = *bufp++;
+       if (isdigit(c))
+           val = c - '0';
+       else if (c >= 'a' && c <= 'f')
+           val = c - 'a' + 10;
+       else if (c >= 'A' && c <= 'F')
+           val = c - 'A' + 10;
+       else {
+#ifdef DEBUG
+           fprintf(stderr, _("in_ether(%s): invalid ether address!\n"), orig);
+#endif
+           errno = EINVAL;
+           return (-1);
+       }
+       val <<= 4;
+       c = *bufp;
+       if (isdigit(c))
+           val |= c - '0';
+       else if (c >= 'a' && c <= 'f')
+           val |= c - 'a' + 10;
+       else if (c >= 'A' && c <= 'F')
+           val |= c - 'A' + 10;
+       else if (c == ':' || c == 0)
+           val >>= 4;
+       else {
+#ifdef DEBUG
+           fprintf(stderr, _("in_ether(%s): invalid ether address!\n"), orig);
+#endif
+           errno = EINVAL;
+           return (-1);
+       }
+       if (c != 0)
+           bufp++;
+       *ptr++ = (unsigned char) (val & 0377);
+       i++;
+
+       /* We might get a semicolon here - not required. */
+       if (*bufp == ':') {
+           if (i == ETH_ALEN) {
+#ifdef DEBUG
+               fprintf(stderr, _("in_ether(%s): trailing : ignored!\n"),
+                       orig)
+#endif
+                   ;           /* nothing */
+           }
+           bufp++;
+       }
+    }
+
+    /* That's it.  Any trailing junk? */
+    if ((i == ETH_ALEN) && (*bufp != '\0')) {
+#ifdef DEBUG
+       fprintf(stderr, _("in_ether(%s): trailing junk!\n"), orig);
+       errno = EINVAL;
+       return (-1);
+#endif
+    }
+#ifdef DEBUG
+    fprintf(stderr, "in_ether(%s): %s\n", orig, pr_ether(sap->sa_data));
+#endif
+
+    return (0);
+}
+
+
+struct hwtype ether_hwtype =
+{
+    "ether", NULL, /*"10Mbps Ethernet", */ ARPHRD_ETHER, ETH_ALEN,
+    pr_ether, in_ether, NULL
+};
+
+
+#endif                         /* HAVE_HWETHER */
+
+
+#if HAVE_HWPPP
+
+#include <net/if_arp.h>
+
+/* Start the PPP encapsulation on the file descriptor. */
+static int do_ppp(int fd)
+{
+    fprintf(stderr, _("You cannot start PPP with this program.\n"));
+    return -1;
+}
+
+
+struct hwtype ppp_hwtype =
+{
+    "ppp", NULL, /*"Point-Point Protocol", */ ARPHRD_PPP, 0,
+    NULL, NULL, do_ppp, 0
+};
+
+
+#endif                         /* HAVE_PPP */
+
+static struct hwtype *hwtypes[] =
+{
+
+    &loop_hwtype,
+
+#if HAVE_HWSLIP
+    &slip_hwtype,
+    &cslip_hwtype,
+    &slip6_hwtype,
+    &cslip6_hwtype,
+    &adaptive_hwtype,
+#endif
+#if HAVE_HWSTRIP
+    &strip_hwtype,
+#endif
+#if HAVE_HWASH
+    &ash_hwtype,
+#endif
+#if HAVE_HWETHER
+    &ether_hwtype,
+#endif
+#if HAVE_HWTR
+    &tr_hwtype,
+#ifdef ARPHRD_IEEE802_TR
+    &tr_hwtype1, 
+#endif
+#endif
+#if HAVE_HWAX25
+    &ax25_hwtype,
+#endif
+#if HAVE_HWNETROM
+    &netrom_hwtype,
+#endif
+#if HAVE_HWROSE
+    &rose_hwtype,
+#endif
+#if HAVE_HWTUNNEL
+    &tunnel_hwtype,
+#endif
+#if HAVE_HWPPP
+    &ppp_hwtype,
+#endif
+#if HAVE_HWHDLCLAPB
+    &hdlc_hwtype,
+    &lapb_hwtype,
+#endif
+#if HAVE_HWARC
+    &arcnet_hwtype,
+#endif
+#if HAVE_HWFR
+    &dlci_hwtype,
+    &frad_hwtype,
+#endif
+#if HAVE_HWSIT
+    &sit_hwtype,
+#endif
+#if HAVE_HWFDDI
+    &fddi_hwtype,
+#endif
+#if HAVE_HWHIPPI
+    &hippi_hwtype,
+#endif
+#if HAVE_HWIRDA
+    &irda_hwtype,
+#endif
+#if HAVE_HWEC
+    &ec_hwtype,
+#endif
+#if HAVE_HWX25
+    &x25_hwtype,
+#endif
+    &unspec_hwtype,
+    NULL
+};
+
+static short sVhwinit = 0;
+
+void hwinit()
+{
+    loop_hwtype.title = _("Local Loopback");
+    unspec_hwtype.title = _("UNSPEC");
+#if HAVE_HWSLIP
+    slip_hwtype.title = _("Serial Line IP");
+    cslip_hwtype.title = _("VJ Serial Line IP");
+    slip6_hwtype.title = _("6-bit Serial Line IP");
+    cslip6_hwtype.title = _("VJ 6-bit Serial Line IP");
+    adaptive_hwtype.title = _("Adaptive Serial Line IP");
+#endif
+#if HAVE_HWETHER
+    ether_hwtype.title = _("Ethernet");
+#endif
+#if HAVE_HWASH
+    ash_hwtype.title = _("Ash");
+#endif
+#if HAVE_HWFDDI
+    fddi_hwtype.title = _("Fiber Distributed Data Interface");
+#endif
+#if HAVE_HWHIPPI
+    hippi_hwtype.title = _("HIPPI");
+#endif
+#if HAVE_HWAX25
+    ax25_hwtype.title = _("AMPR AX.25");
+#endif
+#if HAVE_HWROSE
+    rose_hwtype.title = _("AMPR ROSE");
+#endif
+#if HAVE_HWNETROM
+    netrom_hwtype.title = _("AMPR NET/ROM");
+#endif
+#if HAVE_HWX25
+    x25_hwtype.title = _("generic X.25");
+#endif
+#if HAVE_HWTUNNEL
+    tunnel_hwtype.title = _("IPIP Tunnel");
+#endif
+#if HAVE_HWPPP
+    ppp_hwtype.title = _("Point-to-Point Protocol");
+#endif
+#if HAVE_HWHDLCLAPB
+    hdlc_hwtype.title = _("(Cisco)-HDLC");
+    lapb_hwtype.title = _("LAPB");
+#endif
+#if HAVE_HWARC
+    arcnet_hwtype.title = _("ARCnet");
+#endif
+#if HAVE_HWFR
+    dlci_hwtype.title = _("Frame Relay DLCI");
+    frad_hwtype.title = _("Frame Relay Access Device");
+#endif
+#if HAVE_HWSIT
+    sit_hwtype.title = _("IPv6-in-IPv4");
+#endif
+#if HAVE_HWIRDA
+    irda_hwtype.title = _("IrLAP");
+#endif
+#if HAVE_HWTR
+    tr_hwtype.title = _("16/4 Mbps Token Ring");
+#ifdef ARPHRD_IEEE802_TR
+    tr_hwtype1.title = _("16/4 Mbps Token Ring (New)") ; 
+#endif
+#endif
+#if HAVE_HWEC
+    ec_hwtype.title = _("Econet");
+#endif
+    sVhwinit = 1;
+}
+
+#ifdef IFF_PORTSEL
+const char *if_port_text[][4] =
+{
+    /* Keep in step with <linux/netdevice.h> */
+    {"unknown", NULL, NULL, NULL},
+    {"10base2", "bnc", "coax", NULL},
+    {"10baseT", "utp", "tpe", NULL},
+    {"AUI", "thick", "db15", NULL},
+    {"100baseT", NULL, NULL, NULL},
+    {"100baseTX", NULL, NULL, NULL},
+    {"100baseFX", NULL, NULL, NULL},
+    {NULL, NULL, NULL, NULL},
+};
+#endif
+
+/* Check our hardware type table for this type. */
+struct hwtype *get_hwntype(int type)
+{
+    struct hwtype **hwp;
+
+    if (!sVhwinit)
+       hwinit();
+
+    hwp = hwtypes;
+    while (*hwp != NULL) {
+       if ((*hwp)->type == type)
+           return (*hwp);
+       hwp++;
+    }
+    return (NULL);
+}
+
+/* return 1 if address is all zeros */
+int hw_null_address(struct hwtype *hw, void *ap)
+{
+    unsigned int i;
+    unsigned char *address = (unsigned char *)ap;
+    for (i = 0; i < hw->alen; i++)
+       if (address[i])
+           return 0;
+    return 1;
+}
+
+void ife_print(struct interface *ptr)
+{
+    struct aftype *ap;
+    struct hwtype *hw;
+    int hf;
+    int can_compress = 0;
+    unsigned long long rx, tx, short_rx, short_tx;
+    char Rext[5]="b";
+    char Text[5]="b";
+
+#if HAVE_AFIPX
+    static struct aftype *ipxtype = NULL;
+#endif
+#if HAVE_AFECONET
+    static struct aftype *ectype = NULL;
+#endif
+#if HAVE_AFATALK
+    static struct aftype *ddptype = NULL;
+#endif
+#if HAVE_AFINET6
+    FILE *f;
+    char addr6[40], devname[20];
+    struct sockaddr_in6 sap;
+    int plen, scope, dad_status, if_idx;
+    extern struct aftype inet6_aftype;
+    char addr6p[8][5];
+#endif
+
+    ap = get_afntype(ptr->addr.sa_family);
+    if (ap == NULL)
+       ap = get_afntype(0);
+
+    hf = ptr->type;
+
+    if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
+       can_compress = 1;
+
+    hw = get_hwntype(hf);
+    if (hw == NULL)
+       hw = get_hwntype(-1);
+
+    printf(_("%-9.9s Link encap:%s  "), ptr->name, hw->title);
+    /* For some hardware types (eg Ash, ATM) we don't print the 
+       hardware address if it's null.  */
+    if (hw->print != NULL && (! (hw_null_address(hw, ptr->hwaddr) &&
+                                 hw->suppress_null_addr)))
+       printf(_("HWaddr %s  "), hw->print(ptr->hwaddr));
+#ifdef IFF_PORTSEL
+    if (ptr->flags & IFF_PORTSEL) {
+       printf(_("Media:%s"), if_port_text[ptr->map.port][0]);
+       if (ptr->flags & IFF_AUTOMEDIA)
+           printf(_("(auto)"));
+    }
+#endif
+    printf("\n");
+
+#if HAVE_AFINET
+    if (ptr->has_ip) {
+       printf(_("          %s addr:%s "), ap->name,
+              ap->sprint(&ptr->addr, 1));
+       if (ptr->flags & IFF_POINTOPOINT) {
+           printf(_(" P-t-P:%s "), ap->sprint(&ptr->dstaddr, 1));
+       }
+       if (ptr->flags & IFF_BROADCAST) {
+           printf(_(" Bcast:%s "), ap->sprint(&ptr->broadaddr, 1));
+       }
+       printf(_(" Mask:%s\n"), ap->sprint(&ptr->netmask, 1));
+    }
+#endif
+
+#if HAVE_AFINET6
+    /* FIXME: should be integrated into interface.c.   */
+
+    if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
+       while (fscanf(f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n",
+                     addr6p[0], addr6p[1], addr6p[2], addr6p[3],
+                     addr6p[4], addr6p[5], addr6p[6], addr6p[7],
+                 &if_idx, &plen, &scope, &dad_status, devname) != EOF) {
+           if (!strcmp(devname, ptr->name)) {
+               sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
+                       addr6p[0], addr6p[1], addr6p[2], addr6p[3],
+                       addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
+               inet6_aftype.input(1, addr6, (struct sockaddr *) &sap);
+               printf(_("          inet6 addr: %s/%d"),
+                inet6_aftype.sprint((struct sockaddr *) &sap, 1), plen);
+               printf(_(" Scope:"));
+               switch (scope) {
+               case 0:
+                   printf(_("Global"));
+                   break;
+               case IPV6_ADDR_LINKLOCAL:
+                   printf(_("Link"));
+                   break;
+               case IPV6_ADDR_SITELOCAL:
+                   printf(_("Site"));
+                   break;
+               case IPV6_ADDR_COMPATv4:
+                   printf(_("Compat"));
+                   break;
+               case IPV6_ADDR_LOOPBACK:
+                   printf(_("Host"));
+                   break;
+               default:
+                   printf(_("Unknown"));
+               }
+               printf("\n");
+           }
+       }
+       fclose(f);
+    }
+#endif
+
+#if HAVE_AFIPX
+    if (ipxtype == NULL)
+       ipxtype = get_afntype(AF_IPX);
+
+    if (ipxtype != NULL) {
+       if (ptr->has_ipx_bb)
+           printf(_("          IPX/Ethernet II addr:%s\n"),
+                  ipxtype->sprint(&ptr->ipxaddr_bb, 1));
+       if (ptr->has_ipx_sn)
+           printf(_("          IPX/Ethernet SNAP addr:%s\n"),
+                  ipxtype->sprint(&ptr->ipxaddr_sn, 1));
+       if (ptr->has_ipx_e2)
+           printf(_("          IPX/Ethernet 802.2 addr:%s\n"),
+                  ipxtype->sprint(&ptr->ipxaddr_e2, 1));
+       if (ptr->has_ipx_e3)
+           printf(_("          IPX/Ethernet 802.3 addr:%s\n"),
+                  ipxtype->sprint(&ptr->ipxaddr_e3, 1));
+    }
+#endif
+
+#if HAVE_AFATALK
+    if (ddptype == NULL)
+       ddptype = get_afntype(AF_APPLETALK);
+    if (ddptype != NULL) {
+       if (ptr->has_ddp)
+           printf(_("          EtherTalk Phase 2 addr:%s\n"), ddptype->sprint(&ptr->ddpaddr, 1));
+    }
+#endif
+
+#if HAVE_AFECONET
+    if (ectype == NULL)
+       ectype = get_afntype(AF_ECONET);
+    if (ectype != NULL) {
+       if (ptr->has_econet)
+           printf(_("          econet addr:%s\n"), ectype->sprint(&ptr->ecaddr, 1));
+    }
+#endif
+
+    printf("          ");
+    /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
+    if (ptr->flags == 0)
+       printf(_("[NO FLAGS] "));
+    if (ptr->flags & IFF_UP)
+       printf(_("UP "));
+    if (ptr->flags & IFF_BROADCAST)
+       printf(_("BROADCAST "));
+    if (ptr->flags & IFF_DEBUG)
+       printf(_("DEBUG "));
+    if (ptr->flags & IFF_LOOPBACK)
+       printf(_("LOOPBACK "));
+    if (ptr->flags & IFF_POINTOPOINT)
+       printf(_("POINTOPOINT "));
+    if (ptr->flags & IFF_NOTRAILERS)
+       printf(_("NOTRAILERS "));
+    if (ptr->flags & IFF_RUNNING)
+       printf(_("RUNNING "));
+    if (ptr->flags & IFF_NOARP)
+       printf(_("NOARP "));
+    if (ptr->flags & IFF_PROMISC)
+       printf(_("PROMISC "));
+    if (ptr->flags & IFF_ALLMULTI)
+       printf(_("ALLMULTI "));
+    if (ptr->flags & IFF_SLAVE)
+       printf(_("SLAVE "));
+    if (ptr->flags & IFF_MASTER)
+       printf(_("MASTER "));
+    if (ptr->flags & IFF_MULTICAST)
+       printf(_("MULTICAST "));
+#ifdef HAVE_DYNAMIC
+    if (ptr->flags & IFF_DYNAMIC)
+       printf(_("DYNAMIC "));
+#endif
+    /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
+    printf(_(" MTU:%d  Metric:%d"),
+          ptr->mtu, ptr->metric ? ptr->metric : 1);
+#ifdef SIOCSKEEPALIVE
+    if (ptr->outfill || ptr->keepalive)
+       printf(_("  Outfill:%d  Keepalive:%d"),
+              ptr->outfill, ptr->keepalive);
+#endif
+    printf("\n");
+
+    /* If needed, display the interface statistics. */
+
+    if (ptr->statistics_valid) {
+       /* XXX: statistics are currently only printed for the primary address,
+        *      not for the aliases, although strictly speaking they're shared
+        *      by all addresses.
+        */
+       printf("          ");
+
+       printf(_("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n"),
+              ptr->stats.rx_packets, ptr->stats.rx_errors,
+              ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
+              ptr->stats.rx_frame_errors);
+       if (can_compress)
+           printf(_("             compressed:%lu\n"), ptr->stats.rx_compressed);
+
+       rx = ptr->stats.rx_bytes;  
+       tx = ptr->stats.tx_bytes;
+       short_rx = rx * 10;  
+       short_tx = tx * 10;
+       if (rx > 1048576) { short_rx /= 1048576;  strcpy(Rext, "Mb"); }
+       else if (rx > 1024) { short_rx /= 1024;  strcpy(Rext, "Kb"); }
+       if (tx > 1048576) { short_tx /= 1048576;  strcpy(Text, "Mb"); }
+       else if (tx > 1024) { short_tx /= 1024;  strcpy(Text, "Kb"); }
+
+       printf("          ");
+       printf(_("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n"),
+              ptr->stats.tx_packets, ptr->stats.tx_errors,
+              ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
+              ptr->stats.tx_carrier_errors);
+       printf(_("          collisions:%lu "), ptr->stats.collisions);
+       if (can_compress)
+           printf(_("compressed:%lu "), ptr->stats.tx_compressed);
+       if (ptr->tx_queue_len != -1)
+           printf(_("txqueuelen:%d "), ptr->tx_queue_len);
+       printf("\n          ");
+       printf(_("RX bytes:%llu (%lu.%lu %s)  TX bytes:%llu (%lu.%lu %s)\n"),
+              rx, (unsigned long)(short_rx / 10), 
+              (unsigned long)(short_rx % 10), Rext, 
+              tx, (unsigned long)(short_tx / 10), 
+              (unsigned long)(short_tx % 10), Text);
+    }
+
+    if ((ptr->map.irq || ptr->map.mem_start || ptr->map.dma ||
+        ptr->map.base_addr)) {
+       printf("          ");
+       if (ptr->map.irq)
+           printf(_("Interrupt:%d "), ptr->map.irq);
+       if (ptr->map.base_addr >= 0x100)        /* Only print devices using it for 
+                                                  I/O maps */
+           printf(_("Base address:0x%x "), ptr->map.base_addr);
+       if (ptr->map.mem_start) {
+           printf(_("Memory:%lx-%lx "), ptr->map.mem_start, ptr->map.mem_end);
+       }
+       if (ptr->map.dma)
+           printf(_("DMA chan:%x "), ptr->map.dma);
+       printf("\n");
+    }
+    printf("\n");
+}
+
+
+int do_if_print(struct interface *ife, void *cookie)
+{
+    int *opt_a = (int *) cookie;
+    int res; 
+
+    res = do_if_fetch(ife); 
+    if (res >= 0) {   
+       if ((ife->flags & IFF_UP) || *opt_a)
+           ife_print(ife);
+    }
+    return res;
+}
+
+struct interface *lookup_interface(char *name)
+{
+    struct interface *ife = NULL;
+
+    if (if_readlist_proc(name) < 0) 
+           return NULL; 
+    ife = add_interface(name); 
+    return ife;
+}
+
+/* for ipv4 add/del modes */
+static int if_print(char *ifname)
+{
+    int res;
+
+    if (!ifname) {
+       res = for_all_interfaces(do_if_print, &opt_a);
+    } else {
+       struct interface *ife;
+
+       ife = lookup_interface(ifname);
+       res = do_if_fetch(ife); 
+       if (res >= 0) 
+           ife_print(ife);
+    }
+    return res; 
+}
+
+int display_interfaces(void)
+{
+    int status;
+
+    /* Create a channel to the NET kernel. */
+    if ((skfd = sockets_open(0)) < 0) {
+       perror("socket");
+       exit(1);
+    }
+
+    /* Do we have to show the current setup? */
+    status = if_print((char *) NULL);
+    close(skfd);
+    exit(status < 0);
+}
+
index a3e2c0f..2a50a96 100644 (file)
  * Foundation;  either  version 2 of the License, or  (at
  * your option) any later version.
  *
- * $Id: ifconfig.c,v 1.3 2001/02/20 06:14:07 andersen Exp $
+ * $Id: ifconfig.c,v 1.4 2001/03/06 00:48:59 andersen Exp $
+ *
+ * Majorly hacked up by Larry Doolittle <ldoolitt@recycle.lbl.gov> 
  *
  */
 
+#include "busybox.h"
+#include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>   // strcmp and friends
 #include <ctype.h>    // isdigit and friends
-#include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
 #include <netinet/in.h>
 #include <net/if.h>
 #include <net/if_arp.h>
 #include <linux/if_ether.h>
-#include "busybox.h"
 
 static int sockfd;  /* socket fd we use to manipulate stuff with */
 
+#define TESTME 0
+#if TESTME
+#define ioctl test_ioctl
+char *saddr_to_a(struct sockaddr *s)
+{
+       if (s->sa_family == ARPHRD_ETHER) {
+               static char hw[18];
+               sprintf(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
+                       s->sa_data[0], s->sa_data[1], s->sa_data[2],
+                       s->sa_data[3], s->sa_data[4], s->sa_data[5]);
+               return hw;
+       } else if (s->sa_family == AF_INET) {
+               struct sockaddr_in *ss = (struct sockaddr_in *) s;
+               return inet_ntoa(ss->sin_addr);
+       } else {
+               return NULL;
+       }
+}
+
+int test_ioctl(int __fd, unsigned long int __request, void *param)
+{
+       struct ifreq *i=(struct ifreq *)param;
+       printf("ioctl fd=%d, request=%ld\n", __fd, __request);
+       
+       switch(__request) {
+               case SIOCGIFFLAGS:   printf("  SIOCGIFFLAGS\n");       i->ifr_flags = 0;   break;
+               case SIOCSIFFLAGS:   printf("  SIOCSIFFLAGS, %x\n",    i->ifr_flags);     break;
+               case SIOCSIFMETRIC:  printf("  SIOCSIFMETRIC, %d\n",   i->ifr_metric);    break;
+               case SIOCSIFMTU:     printf("  SIOCSIFMTU, %d\n",      i->ifr_mtu);       break;
+               case SIOCSIFBRDADDR: printf("  SIOCSIFBRDADDR, %s\n",  saddr_to_a(&(i->ifr_broadaddr))); break;
+               case SIOCSIFDSTADDR: printf("  SIOCSIFDSTADDR, %s\n",  saddr_to_a(&(i->ifr_dstaddr  ))); break;
+               case SIOCSIFNETMASK: printf("  SIOCSIFNETMASK, %s\n",  saddr_to_a(&(i->ifr_netmask  ))); break;
+               case SIOCSIFADDR:    printf("  SIOCSIFADDR, %s\n",     saddr_to_a(&(i->ifr_addr     ))); break;
+               case SIOCSIFHWADDR:  printf("  SIOCSIFHWADDR, %s\n",   saddr_to_a(&(i->ifr_hwaddr   ))); break;  /* broken */
+               default:
+       }
+       return 0;
+}
+#endif
+
+
 /* print usage and exit */
 
 #define _(x) x
@@ -49,7 +92,7 @@ set_flag(char *ifname, short flag)
        strcpy(ifr.ifr_name, ifname);
        if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) < 0) {
                perror("SIOCGIFFLAGS"); 
-               return (-1);
+               return -1;
        }
        strcpy(ifr.ifr_name, ifname);
        ifr.ifr_flags |= flag;
@@ -57,7 +100,7 @@ set_flag(char *ifname, short flag)
                perror("SIOCSIFFLAGS");
                return -1;
        }
-       return (0);
+       return 0;
 }
 
 
@@ -78,9 +121,62 @@ clr_flag(char *ifname, short flag)
                perror("SIOCSIFFLAGS");
                return -1;
        }
-       return (0);
+       return 0;
 }
 
+/* which element in struct ifreq to frob */
+enum frob {
+       L_METRIC,
+       L_MTU,
+       L_DATA,
+       L_BROAD,
+       L_DEST,
+       L_MASK,
+       L_HWAD,
+};
+
+
+struct flag_map {
+       char *name;
+       enum frob frob;
+       int flag;
+       int sflag;
+       int action;
+};
+
+/* action:
+ *  2   set
+ *  4   clear
+ *  6   set/clear
+ *  8   clear/set
+ *  10  numeric
+ *  12  address
+ *  14  address/clear
+ */
+const static struct flag_map flag_table[] = {
+       {"arp",         0,  IFF_NOARP,             0, 6},
+       {"trailers",    0,  IFF_NOTRAILERS,        0, 6},
+       {"promisc",     0,  IFF_PROMISC,           0, 8},
+       {"multicast",   0,  IFF_MULTICAST,         0, 8},
+       {"allmulti",    0,  IFF_ALLMULTI,          0, 8},
+       {"up",          0, (IFF_UP | IFF_RUNNING), 0, 2},
+       {"down",        0,  IFF_UP,                0, 4},
+       {"metric",      L_METRIC,              0, SIOCSIFMETRIC,  10},
+       {"mtu",         L_MTU,                 0, SIOCSIFMTU,     10},
+#ifdef SIOCSKEEPALIVE
+       {"keepalive",   L_DATA,                0, SIOCSKEEPALIVE, 10},
+#endif
+#ifdef SIOCSOUTFILL
+       {"outfill",     L_DATA,                0, SIOCSOUTFILL,   10},
+#endif
+       {"broadcast",   L_BROAD, IFF_BROADCAST,   SIOCSIFBRDADDR, 14},
+       {"dstaddr",     L_DEST,                0, SIOCSIFDSTADDR, 12},
+       {"netmask",     L_MASK,                0, SIOCSIFNETMASK, 12},
+       {"pointopoint", L_DEST,  IFF_POINTOPOINT, SIOCSIFDSTADDR, 14},
+       {"hw",          L_HWAD,                0, SIOCSIFHWADDR,  14},
+};
+
+
 /* resolve XXX.YYY.ZZZ.QQQ -> binary */
 
 static int
@@ -90,15 +186,16 @@ INET_resolve(char *name, struct sockaddr_in *sin)
        sin->sin_port = 0;
 
        /* Default is special, meaning 0.0.0.0. */
-       if (!strcmp(name, "default")) {
+       if (strcmp(name, "default")==0) {
                sin->sin_addr.s_addr = INADDR_ANY;
-               return (1);
+               return 1;
        }
        /* Look to see if it's a dotted quad. */
        if (inet_aton(name, &sin->sin_addr)) {
                return 0;
        }
        /* guess not.. */
+       errno = EINVAL;
        return -1;
 }
 
@@ -127,12 +224,12 @@ in_ether(char *bufp, struct sockaddr *sap)
                        val = c - 'A' + 10;
                else {
 #ifdef DEBUG
-                       fprintf(stderr,
-                               _("in_ether(%s): invalid ether address!\n"),
+                       error_msg(
+                               _("in_ether(%s): invalid ether address!"),
                                orig);
 #endif
                        errno = EINVAL;
-                       return (-1);
+                       return -1;
                }
                val <<= 4;
                c = *bufp;
@@ -146,22 +243,19 @@ in_ether(char *bufp, struct sockaddr *sap)
                        val >>= 4;
                else {
 #ifdef DEBUG
-                       fprintf(stderr,
-                               _("in_ether(%s): invalid ether address!\n"),
+                       error_msg(
+                               _("in_ether(%s): invalid ether address!"),
                                orig);
 #endif
                        errno = EINVAL;
-                       return (-1);
+                       return -1;
                }
                if (c != 0)
                        bufp++;
                *ptr++ = (unsigned char) (val & 0377);
                i++;
                
-               /* We might get a semicolon here - not required. */
-               if (*bufp == ':')
-                       bufp++;
-               
+               /* optional colon already handled, don't swallow a second */
        }
 
        if(i != ETH_ALEN) {
@@ -171,25 +265,37 @@ in_ether(char *bufp, struct sockaddr *sap)
 
        return 0;
 }
+               
+#ifdef BB_FEATURE_IFCONFIG_STATUS
+extern int display_interfaces(void);
+#else
+int display_interfaces(void)
+{
+    show_usage();
+}
+#endif
 
 int ifconfig_main(int argc, char **argv)
 {
        struct ifreq ifr;
        struct sockaddr_in sa;
-       struct sockaddr sa2;
-       char **spp;
+       char **spp, *cmd;
        int goterr = 0;
-       int r, didnetmask = 0;
+       int r;
+       /* int didnetmask = 0;   special case input error detection no longer implemented */
        char host[128];
+       const struct flag_map *ft;
+       int i, sense;
+       int a, ecode;
+       struct sockaddr *d;
 
        if(argc < 2) {
-               show_usage();
+               return(display_interfaces());
        }
 
        /* Create a channel to the NET kernel. */
        if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-               perror("socket");
-               exit(1);
+               perror_msg_and_die("socket");
        }
 
        /* skip argv[0] */
@@ -205,235 +311,84 @@ int ifconfig_main(int argc, char **argv)
 
        /* Process the remaining arguments. */
        while (*spp != (char *) NULL) {
-               if (!strcmp(*spp, "arp")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_NOARP);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-arp")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_NOARP);
-                       spp++;
-                       continue;
-               }
-               
-               if (!strcmp(*spp, "trailers")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_NOTRAILERS);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-trailers")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_NOTRAILERS);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "promisc")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_PROMISC);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-promisc")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_PROMISC);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "multicast")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_MULTICAST);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-multicast")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_MULTICAST);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "allmulti")) {
-                       goterr |= set_flag(ifr.ifr_name, IFF_ALLMULTI);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "-allmulti")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_ALLMULTI);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "up")) {
-                       goterr |= set_flag(ifr.ifr_name, (IFF_UP | IFF_RUNNING));
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "down")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_UP);
-                       spp++;
-                       continue;
-               }
-
-               if (!strcmp(*spp, "metric")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_metric = atoi(*spp);
-                       if (ioctl(sockfd, SIOCSIFMETRIC, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSIFMETRIC: %s\n", strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "mtu")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_mtu = atoi(*spp);
-                       if (ioctl(sockfd, SIOCSIFMTU, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSIFMTU: %s\n", strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
+               cmd = *spp;
+               sense=0;
+               if (*cmd=='-') {
+                       sense=1;
+                       cmd++;
                }
-#ifdef SIOCSKEEPALIVE
-               if (!strcmp(*spp, "keepalive")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_data = (caddr_t) atoi(*spp);
-                       if (ioctl(sockfd, SIOCSKEEPALIVE, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSKEEPALIVE: %s\n", strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-#endif
-
-#ifdef SIOCSOUTFILL
-               if (!strcmp(*spp, "outfill")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       ifr.ifr_data = (caddr_t) atoi(*spp);
-                       if (ioctl(sockfd, SIOCSOUTFILL, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSOUTFILL: %s\n", strerror(errno));
-                               goterr++;
+               ft = NULL;
+               for (i=0; i<(sizeof(flag_table)/sizeof(struct flag_map)); i++) {
+                       if (strcmp(cmd, flag_table[i].name)==0) {
+                               ft=flag_table+i;
+                               spp++;
+                               break;
                        }
-                       spp++;
-                       continue;
                }
-#endif
+               if (ft) {
+                       switch (ft->action+sense) {
+                       case 4:
+                       case 7:
+                       case 8:
+                       case 15:
+                               goterr |= clr_flag(ifr.ifr_name, ft->flag);
+                               break;
+                       case 2:
+                       case 6:
+                       case 9:
+                               goterr |= set_flag(ifr.ifr_name, ft->flag);
+                               break;
+                       case 10:
+                               if (*spp == NULL)
+                                       show_usage();
+                               a = atoi(*spp++);
+                               switch (ft->frob) {
+                                       case L_METRIC: ifr.ifr_metric = a; break;
+                                       case L_MTU:    ifr.ifr_mtu    = a; break;
+                                       case L_DATA:   ifr.ifr_data   = (caddr_t) a; break;
+                                       default: error_msg_and_die("bugaboo");
+                               }
 
-               if (!strcmp(*spp, "-broadcast")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_BROADCAST);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "broadcast")) {
-                       if (*++spp != NULL) {
-                               safe_strncpy(host, *spp, (sizeof host));
-                               if (INET_resolve(host, &sa) < 0) {
+                               if (ioctl(sockfd, ft->sflag, &ifr) < 0) {
+                                       perror(ft->name);  /* imperfect */
                                        goterr++;
-                                       spp++;
-                                       continue;
                                }
-                               memcpy((char *) &ifr.ifr_broadaddr,
-                                      (char *) &sa,
-                                      sizeof(struct sockaddr));
-                               if (ioctl(sockfd, SIOCSIFBRDADDR, &ifr) < 0) {
-                                       perror("SIOCSIFBRDADDR");
-                                       goterr++;
+                               break;
+                       case 12:
+                       case 14:
+                               if (ft->action+sense==10 && *spp == NULL) {
+                                       show_usage();
+                                       break;
                                }
-                               spp++;
-                       }
-                       goterr |= set_flag(ifr.ifr_name, IFF_BROADCAST);
-                       continue;
-               }
-               if (!strcmp(*spp, "dstaddr")) {
-                       if (*++spp == NULL)
-                               show_usage();
-                       safe_strncpy(host, *spp, (sizeof host));
-                       if (INET_resolve(host, &sa) < 0) {
-                               goterr++;
-                               spp++;
-                               continue;
-                       }
-                       memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa,
-                              sizeof(struct sockaddr));
-                       if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
-                               fprintf(stderr, "SIOCSIFDSTADDR: %s\n",
-                                       strerror(errno));
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "netmask")) {
-                       if (*++spp == NULL || didnetmask)
-                               show_usage();
-                       safe_strncpy(host, *spp, (sizeof host));
-                       if (INET_resolve(host, &sa) < 0) {
-                               goterr++;
-                               spp++;
-                               continue;
-                       }
-                       didnetmask++;
-                       memcpy((char *) &ifr.ifr_netmask, (char *) &sa,
-                              sizeof(struct sockaddr));
-                       if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
-                               perror("SIOCSIFNETMASK");
-                               goterr++;
-                       }
-                       spp++;
-                       continue;
-               }
-
-               if (!strcmp(*spp, "-pointopoint")) {
-                       goterr |= clr_flag(ifr.ifr_name, IFF_POINTOPOINT);
-                       spp++;
-                       continue;
-               }
-               if (!strcmp(*spp, "pointopoint")) {
-                       if (*(spp + 1) != NULL) {
-                               spp++;
-                               safe_strncpy(host, *spp, (sizeof host));
-                               if (INET_resolve(host, &sa)) {
-                                       goterr++;
+                               if (*spp != NULL) {
+                                       safe_strncpy(host, *spp, (sizeof host));
                                        spp++;
-                                       continue;
+                                       if (ft->frob == L_HWAD) {
+                                               ecode = in_ether(host, &ifr.ifr_hwaddr);
+                                       } else {
+                                               switch (ft->frob) {
+                                                       case L_BROAD: d = &ifr.ifr_broadaddr; break;
+                                                       case L_DEST:  d = &ifr.ifr_dstaddr;   break;
+                                                       case L_MASK:  d = &ifr.ifr_netmask;   break;
+                                                       default: error_msg_and_die("bugaboo");
+                                               }
+                                               ecode = INET_resolve(host, (struct sockaddr_in *) d);
+                                       }
+                                       if (ecode < 0 || ioctl(sockfd, ft->sflag, &ifr) < 0) {
+                                               perror(ft->name);  /* imperfect */
+                                               goterr++;
+                                       }
                                }
-                               memcpy((char *) &ifr.ifr_dstaddr, (char *) &sa,
-                                      sizeof(struct sockaddr));
-                               if (ioctl(sockfd, SIOCSIFDSTADDR, &ifr) < 0) {
-                                       perror("SIOCSIFDSTADDR");
-                                       goterr++;
+                               if (ft->flag != 0) {
+                                       goterr |= set_flag(ifr.ifr_name, ft->flag);
                                }
-                       }
-                       goterr |= set_flag(ifr.ifr_name, IFF_POINTOPOINT);
-                       spp++;
-                       continue;
-               };
-
-               if (!strcmp(*spp, "hw")) {
-                       if (*++spp == NULL || strcmp("ether", *spp)) {
+                               break;
+                       default:
                                show_usage();
-                       }
-                               
-                       if (*++spp == NULL) {
-                               /* silently ignore it if no address */
-                               continue;
-                       }
-
-                       safe_strncpy(host, *spp, (sizeof host));
-                       if (in_ether(host, &sa2) < 0) {
-                               fprintf(stderr, "invalid hw-addr %s\n", host);
-                               goterr++;
-                               spp++;
-                               continue;
-                       }
-                       memcpy((char *) &ifr.ifr_hwaddr, (char *) &sa2,
-                              sizeof(struct sockaddr));
-                       if (ioctl(sockfd, SIOCSIFHWADDR, &ifr) < 0) {
-                               perror("SIOCSIFHWADDR");
-                               goterr++;
-                       }
-                       spp++;
+                       } /* end of switch */
                        continue;
                }
-
+               
                /* If the next argument is a valid hostname, assume OK. */
                safe_strncpy(host, *spp, (sizeof host));
 
@@ -471,6 +426,6 @@ int ifconfig_main(int argc, char **argv)
 
        } /* end of while-loop */
 
-        exit(0);
+        return goterr;
 }