2 * stolen from net-tools-1.59 and stripped down for busybox by
3 * Erik Andersen <andersen@codepoet.org>
5 * Heavily modified by Manuel Novoa III Mar 12, 2001
7 * Pruned unused code using KEEP_UNUSED define.
8 * Added print_bytes_scaled function to reduce code size.
9 * Added some (potentially) missing defines.
10 * Improved display support for -a and for a named interface.
12 * -----------------------------------------------------------
14 * ifconfig This file contains an implementation of the command
15 * that either displays or sets the characteristics of
16 * one or more of the system's networking interfaces.
18 * Version: $Id: interface.c,v 1.25 2004/08/26 21:45:21 andersen Exp $
20 * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
21 * and others. Copyright 1993 MicroWalt Corporation
23 * This program is free software; you can redistribute it
24 * and/or modify it under the terms of the GNU General
25 * Public License as published by the Free Software
26 * Foundation; either version 2 of the License, or (at
27 * your option) any later version.
29 * Patched to support 'add' and 'del' keywords for INET(4) addresses
30 * by Mrs. Brisby <mrs.brisby@nimh.org>
32 * {1.34} - 19980630 - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
33 * - gettext instead of catgets for i18n
34 * 10/1998 - Andi Kleen. Use interface list primitives.
35 * 20001008 - Bernd Eckenfels, Patch from RH for setting mtu
36 * (default AF was wrong)
39 /* #define KEEP_UNUSED */
50 * Device Hardware types.
53 #define HAVE_HWETHER 1
57 #include "inet_common.h"
65 #include <sys/ioctl.h>
66 #include <sys/types.h>
68 #include <net/if_arp.h>
71 #ifdef CONFIG_FEATURE_IPV6
72 # define HAVE_AFINET6 1
77 #define _PATH_PROCNET_DEV "/proc/net/dev"
78 #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
84 * This is in linux/include/net/ipv6.h.
88 struct in6_addr ifr6_addr;
89 uint32_t ifr6_prefixlen;
90 unsigned int ifr6_ifindex;
95 #endif /* HAVE_AFINET6 */
97 /* Defines for glibc2.0 users. */
99 #define SIOCSIFTXQLEN 0x8943
100 #define SIOCGIFTXQLEN 0x8942
103 /* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
105 #define ifr_qlen ifr_ifru.ifru_mtu
108 #ifndef HAVE_TXQUEUELEN
109 #define HAVE_TXQUEUELEN 1
113 #define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
116 /* This structure defines protocol families and their handlers. */
122 char *(*print) (unsigned char *);
123 char *(*sprint) (struct sockaddr *, int numeric);
124 int (*input) (int type, char *bufp, struct sockaddr *);
125 void (*herror) (char *text);
126 int (*rprint) (int options);
127 int (*rinput) (int typ, int ext, char **argv);
130 int (*getmask) (char *src, struct sockaddr * mask, char *name);
139 static int flag_inet;
141 static struct aftrans_t {
148 "ip", "inet", &flag_inet},
151 "ip6", "inet6", &flag_inet6},
154 "inet", "inet", &flag_inet},
157 "inet6", "inet6", &flag_inet6},
160 "unix", "unix", &flag_unx}, {
161 "tcpip", "inet", &flag_inet},
166 static char afname[256] = "";
167 #endif /* KEEP_UNUSED */
171 /* Display a UNIX domain address. */
172 static char *UNIX_print(unsigned char *ptr)
178 /* Display a UNIX domain address. */
179 static char *UNIX_sprint(struct sockaddr *sap, int numeric)
183 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
184 return safe_strncpy(buf, "[NONE SET]", sizeof(buf));
185 return (UNIX_print(sap->sa_data));
189 static struct aftype unix_aftype = {
190 "unix", "UNIX Domain", AF_UNIX, 0,
191 UNIX_print, UNIX_sprint, NULL, NULL,
196 #endif /* HAVE_AFUNIX */
201 static void INET_reserror(char *text)
206 /* Display an Internet socket address. */
207 static char *INET_print(unsigned char *ptr)
209 return (inet_ntoa((*(struct in_addr *) ptr)));
211 #endif /* KEEP_UNUSED */
213 /* Display an Internet socket address. */
214 static char *INET_sprint(struct sockaddr *sap, int numeric)
216 static char buff[128];
218 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
219 return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
221 if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap,
222 numeric, 0xffffff00) != 0)
229 static char *INET_sprintmask(struct sockaddr *sap, int numeric,
230 unsigned int netmask)
232 static char buff[128];
234 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
235 return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
236 if (INET_rresolve(buff, sizeof(buff), (struct sockaddr_in *) sap,
237 numeric, netmask) != 0)
242 static int INET_getsock(char *bufp, struct sockaddr *sap)
244 char *sp = bufp, *bp;
247 struct sockaddr_in *sin;
249 sin = (struct sockaddr_in *) sap;
250 sin->sin_family = AF_INET;
255 for (i = 0; i < sizeof(sin->sin_addr.s_addr); i++) {
258 if ((*sp >= 'A') && (*sp <= 'F'))
259 bp[i] |= (int) (*sp - 'A') + 10;
260 else if ((*sp >= '0') && (*sp <= '9'))
261 bp[i] |= (int) (*sp - '0');
269 if ((*sp >= 'A') && (*sp <= 'F'))
270 bp[i] |= (int) (*sp - 'A') + 10;
271 else if ((*sp >= '0') && (*sp <= '9'))
272 bp[i] |= (int) (*sp - '0');
278 sin->sin_addr.s_addr = htonl(val);
283 static int INET_input(int type, char *bufp, struct sockaddr *sap)
287 return (INET_getsock(bufp, sap));
289 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 1));
291 return (INET_resolve(bufp, (struct sockaddr_in *) sap, 0));
295 static int INET_getnetmask(char *adr, struct sockaddr *m, char *name)
297 struct sockaddr_in *mask = (struct sockaddr_in *) m;
301 if ((slash = strchr(adr, '/')) == NULL)
305 prefix = strtoul(slash, &end, 0);
310 sprintf(name, "/%d", prefix);
312 mask->sin_family = AF_INET;
313 mask->sin_addr.s_addr = htonl(~(0xffffffffU >> prefix));
316 #endif /* KEEP_UNUSED */
318 static struct aftype inet_aftype = {
319 "inet", "DARPA Internet", AF_INET, sizeof(unsigned long),
320 NULL /* UNUSED INET_print */ , INET_sprint,
321 NULL /* UNUSED INET_input */ , NULL /* UNUSED INET_reserror */ ,
322 NULL /*INET_rprint */ , NULL /*INET_rinput */ ,
323 NULL /* UNUSED INET_getnetmask */ ,
328 #endif /* HAVE_AFINET */
333 static void INET6_reserror(char *text)
338 /* Display an Internet socket address. */
339 static char *INET6_print(unsigned char *ptr)
341 static char name[80];
343 inet_ntop(AF_INET6, (struct in6_addr *) ptr, name, 80);
346 #endif /* KEEP_UNUSED */
348 /* Display an Internet socket address. */
349 /* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
350 static char *INET6_sprint(struct sockaddr *sap, int numeric)
352 static char buff[128];
354 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
355 return safe_strncpy(buff, "[NONE SET]", sizeof(buff));
357 (buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric) != 0)
358 return safe_strncpy(buff, "[UNKNOWN]", sizeof(buff));
363 static int INET6_getsock(char *bufp, struct sockaddr *sap)
365 struct sockaddr_in6 *sin6;
367 sin6 = (struct sockaddr_in6 *) sap;
368 sin6->sin6_family = AF_INET6;
371 if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
377 static int INET6_input(int type, char *bufp, struct sockaddr *sap)
381 return (INET6_getsock(bufp, sap));
383 return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
386 #endif /* KEEP_UNUSED */
388 static struct aftype inet6_aftype = {
389 "inet6", "IPv6", AF_INET6, sizeof(struct in6_addr),
390 NULL /* UNUSED INET6_print */ , INET6_sprint,
391 NULL /* UNUSED INET6_input */ , NULL /* UNUSED INET6_reserror */ ,
392 NULL /*INET6_rprint */ , NULL /*INET6_rinput */ ,
393 NULL /* UNUSED INET6_getnetmask */ ,
398 #endif /* HAVE_AFINET6 */
400 /* Display an UNSPEC address. */
401 static char *UNSPEC_print(unsigned char *ptr)
403 static char buff[sizeof(struct sockaddr) * 3 + 1];
408 for (i = 0; i < sizeof(struct sockaddr); i++) {
409 /* careful -- not every libc's sprintf returns # bytes written */
410 sprintf(pos, "%02X-", (*ptr++ & 0377));
413 /* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
418 /* Display an UNSPEC socket address. */
419 static char *UNSPEC_sprint(struct sockaddr *sap, int numeric)
423 if (sap->sa_family == 0xFFFF || sap->sa_family == 0)
424 return safe_strncpy(buf, "[NONE SET]", sizeof(buf));
425 return (UNSPEC_print((unsigned char *)sap->sa_data));
428 static struct aftype unspec_aftype = {
429 "unspec", "UNSPEC", AF_UNSPEC, 0,
430 UNSPEC_print, UNSPEC_sprint, NULL, NULL,
434 static struct aftype * const aftypes[] = {
449 static short sVafinit = 0;
453 unspec_aftype.title = "UNSPEC";
455 unix_aftype.title = "UNIX Domain";
458 inet_aftype.title = "DARPA Internet";
461 inet6_aftype.title = "IPv6";
466 static int aftrans_opt(const char *arg)
468 struct aftrans_t *paft;
472 safe_strncpy(buf, arg, sizeof(buf));
478 tmp2 = strchr(tmp1, ',');
484 for (paft = aftrans; paft->alias; paft++) {
485 if (strcmp(tmp1, paft->alias))
487 if (strlen(paft->name) + strlen(afname) + 1 >= sizeof(afname)) {
488 bb_error_msg("Too many address family arguments.");
495 strcat(afname, paft->name);
499 bb_error_msg("Unknown address family `%s'.", tmp1);
508 /* set the default AF list from the program name or a constant value */
509 static void aftrans_def(char *tool, char *argv0, char *dflt)
514 strcpy(afname, dflt);
516 if (!(tmp = strrchr(argv0, '/')))
517 tmp = argv0; /* no slash?! */
521 if (!(buf = strdup(tmp)))
524 if (strlen(tool) >= strlen(tmp)) {
528 tmp = buf + (strlen(tmp) - strlen(tool));
530 if (strcmp(tmp, tool) != 0) {
535 if ((tmp = strchr(buf, '_')))
539 if (aftrans_opt(buf))
545 /* Check our protocol family table for this family. */
546 static struct aftype *get_aftype(const char *name)
548 struct aftype * const *afp;
553 #endif /* KEEP_UNUSED */
556 while (*afp != NULL) {
557 if (!strcmp((*afp)->name, name))
561 if (strchr(name, ','))
562 bb_error_msg("Only one address family.");
565 #endif /* KEEP_UNUSED */
567 /* Check our protocol family table for this family. */
568 static struct aftype *get_afntype(int af)
570 struct aftype * const *afp;
575 #endif /* KEEP_UNUSED */
578 while (*afp != NULL) {
579 if ((*afp)->af == af)
586 /* Check our protocol family table for this family and return its socket */
587 static int get_socket_for_af(int af)
589 struct aftype * const *afp;
594 #endif /* KEEP_UNUSED */
597 while (*afp != NULL) {
598 if ((*afp)->af == af)
606 /* type: 0=all, 1=getroute */
607 static void print_aflist(int type)
611 struct aftype * const *afp;
616 #endif /* KEEP_UNUSED */
619 while (*afp != NULL) {
620 if ((type == 1 && ((*afp)->rprint == NULL)) || ((*afp)->af == 0)) {
624 if ((count % 3) == 0)
625 fprintf(stderr, count ? "\n " : " ");
629 fprintf(stderr, "%s (%s) ", txt, (*afp)->title);
633 fprintf(stderr, "\n");
635 #endif /* KEEP_UNUSED */
637 struct user_net_device_stats {
638 unsigned long long rx_packets; /* total packets received */
639 unsigned long long tx_packets; /* total packets transmitted */
640 unsigned long long rx_bytes; /* total bytes received */
641 unsigned long long tx_bytes; /* total bytes transmitted */
642 unsigned long rx_errors; /* bad packets received */
643 unsigned long tx_errors; /* packet transmit problems */
644 unsigned long rx_dropped; /* no space in linux buffers */
645 unsigned long tx_dropped; /* no space available in linux */
646 unsigned long rx_multicast; /* multicast packets received */
647 unsigned long rx_compressed;
648 unsigned long tx_compressed;
649 unsigned long collisions;
651 /* detailed rx_errors: */
652 unsigned long rx_length_errors;
653 unsigned long rx_over_errors; /* receiver ring buff overflow */
654 unsigned long rx_crc_errors; /* recved pkt with crc error */
655 unsigned long rx_frame_errors; /* recv'd frame alignment error */
656 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
657 unsigned long rx_missed_errors; /* receiver missed packet */
658 /* detailed tx_errors */
659 unsigned long tx_aborted_errors;
660 unsigned long tx_carrier_errors;
661 unsigned long tx_fifo_errors;
662 unsigned long tx_heartbeat_errors;
663 unsigned long tx_window_errors;
667 struct interface *next, *prev;
668 char name[IFNAMSIZ]; /* interface name */
669 short type; /* if type */
670 short flags; /* various flags */
671 int metric; /* routing metric */
672 int mtu; /* MTU value */
673 int tx_queue_len; /* transmit queue length */
674 struct ifmap map; /* hardware setup */
675 struct sockaddr addr; /* IP address */
676 struct sockaddr dstaddr; /* P-P IP address */
677 struct sockaddr broadaddr; /* IP broadcast address */
678 struct sockaddr netmask; /* IP network mask */
680 char hwaddr[32]; /* HW address */
681 int statistics_valid;
682 struct user_net_device_stats stats; /* statistics */
683 int keepalive; /* keepalive value for SLIP */
684 int outfill; /* outfill value for SLIP */
688 int interface_opt_a = 0; /* show all interfaces */
691 static int opt_i = 0; /* show the statistics */
692 static int opt_v = 0; /* debugging output flag */
694 static int addr_family = 0; /* currently selected AF */
695 #endif /* KEEP_UNUSED */
697 static struct interface *int_list, *int_last;
698 static int skfd = -1; /* generic raw socket desc. */
701 static int sockets_open(int family)
703 struct aftype * const *aft;
705 static int force = -1;
709 if (get_linux_version_code() < KERNEL_VERSION(2,1,0))
711 if (access("/proc/net", R_OK))
714 for (aft = aftypes; *aft; aft++) {
715 struct aftype *af = *aft;
716 int type = SOCK_DGRAM;
718 if (af->af == AF_UNSPEC)
720 if (family && family != af->af)
726 /* Check some /proc file first to not stress kmod */
727 if (!family && !force && af->flag_file) {
728 if (access(af->flag_file, R_OK))
731 af->fd = socket(af->af, type, 0);
736 bb_error_msg("No usable address families found.");
741 #ifdef CONFIG_FEATURE_CLEAN_UP
742 static void sockets_close(void)
744 struct aftype * const *aft;
745 for (aft = aftypes; *aft != NULL; aft++) {
746 struct aftype *af = *aft;
755 /* like strcmp(), but knows about numbers */
756 static int nstrcmp(const char *a, const char *b)
758 const char *a_ptr = a;
759 const char *b_ptr = b;
765 if (!isdigit(*a) && isdigit(*(a+1))) {
773 if (isdigit(*a) && isdigit(*b)) {
774 return atoi(a_ptr) > atoi(b_ptr) ? 1 : -1;
779 static struct interface *add_interface(char *name)
781 struct interface *ife, **nextp, *new;
783 for (ife = int_last; ife; ife = ife->prev) {
784 int n = nstrcmp(ife->name, name);
792 new = xzalloc(sizeof(*new));
793 safe_strncpy(new->name, name, IFNAMSIZ);
794 nextp = ife ? &ife->next : &int_list;
798 new->next->prev = new;
806 static int if_readconf(void)
814 /* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
816 skfd2 = get_socket_for_af(AF_INET);
818 bb_perror_msg(("warning: no inet socket available"));
819 /* Try to soldier on with whatever socket we can get hold of. */
820 skfd2 = sockets_open(0);
827 ifc.ifc_len = sizeof(struct ifreq) * numreqs;
828 ifc.ifc_buf = xrealloc(ifc.ifc_buf, ifc.ifc_len);
830 if (ioctl(skfd2, SIOCGIFCONF, &ifc) < 0) {
831 perror("SIOCGIFCONF");
834 if (ifc.ifc_len == sizeof(struct ifreq) * numreqs) {
835 /* assume it overflowed and try again */
843 for (n = 0; n < ifc.ifc_len; n += sizeof(struct ifreq)) {
844 add_interface(ifr->ifr_name);
854 static char *get_name(char *name, char *p)
856 /* Extract <name>[:<alias>] from nul-terminated p where p matches
857 <name>[:<alias>]: after leading whitespace.
858 If match is not made, set name empty and return unchanged p */
859 int namestart=0, nameend=0, aliasend;
860 while (isspace(p[namestart]))
863 while (p[nameend] && p[nameend]!=':' && !isspace(p[nameend]))
865 if (p[nameend]==':') {
867 while (p[aliasend] && isdigit(p[aliasend]))
869 if (p[aliasend]==':') {
872 if ((nameend-namestart)<IFNAMSIZ) {
873 memcpy(name,&p[namestart],nameend-namestart);
874 name[nameend-namestart]='\0';
877 /* Interface name too large */
881 /* first ':' not found - return empty */
887 /* If scanf supports size qualifiers for %n conversions, then we can
888 * use a modified fmt that simply stores the position in the fields
889 * having no associated fields in the proc string. Of course, we need
890 * to zero them again when we're done. But that is smaller than the
891 * old approach of multiple scanf occurrences with large numbers of
894 /* static const char * const ss_fmt[] = { */
895 /* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
896 /* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
897 /* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
900 /* Lie about the size of the int pointed to for %n. */
901 #if INT_MAX == LONG_MAX
902 static const char * const ss_fmt[] = {
903 "%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
904 "%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
905 "%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
908 static const char * const ss_fmt[] = {
909 "%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
910 "%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
911 "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
916 static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
918 memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
920 sscanf(bp, ss_fmt[procnetdev_vsn],
921 &ife->stats.rx_bytes, /* missing for 0 */
922 &ife->stats.rx_packets,
923 &ife->stats.rx_errors,
924 &ife->stats.rx_dropped,
925 &ife->stats.rx_fifo_errors,
926 &ife->stats.rx_frame_errors,
927 &ife->stats.rx_compressed, /* missing for <= 1 */
928 &ife->stats.rx_multicast, /* missing for <= 1 */
929 &ife->stats.tx_bytes, /* missing for 0 */
930 &ife->stats.tx_packets,
931 &ife->stats.tx_errors,
932 &ife->stats.tx_dropped,
933 &ife->stats.tx_fifo_errors,
934 &ife->stats.collisions,
935 &ife->stats.tx_carrier_errors,
936 &ife->stats.tx_compressed /* missing for <= 1 */
939 if (procnetdev_vsn <= 1) {
940 if (procnetdev_vsn == 0) {
941 ife->stats.rx_bytes = 0;
942 ife->stats.tx_bytes = 0;
944 ife->stats.rx_multicast = 0;
945 ife->stats.rx_compressed = 0;
946 ife->stats.tx_compressed = 0;
950 static inline int procnetdev_version(char *buf)
952 if (strstr(buf, "compressed"))
954 if (strstr(buf, "bytes"))
959 static int if_readlist_proc(char *target)
961 static int proc_read;
964 struct interface *ife;
965 int err, procnetdev_vsn;
972 fh = fopen(_PATH_PROCNET_DEV, "r");
974 bb_perror_msg("Warning: cannot open %s. Limited output.", _PATH_PROCNET_DEV);
975 return if_readconf();
977 fgets(buf, sizeof buf, fh); /* eat line */
978 fgets(buf, sizeof buf, fh);
980 procnetdev_vsn = procnetdev_version(buf);
983 while (fgets(buf, sizeof buf, fh)) {
986 s = get_name(name, buf);
987 ife = add_interface(name);
988 get_dev_fields(s, ife, procnetdev_vsn);
989 ife->statistics_valid = 1;
990 if (target && !strcmp(target, name))
994 perror(_PATH_PROCNET_DEV);
1002 static int if_readlist(void)
1004 int err = if_readlist_proc(NULL);
1007 err = if_readconf();
1011 static int for_all_interfaces(int (*doit) (struct interface *, void *),
1014 struct interface *ife;
1016 if (!int_list && (if_readlist() < 0))
1018 for (ife = int_list; ife; ife = ife->next) {
1019 int err = doit(ife, cookie);
1027 /* Fetch the interface configuration from the kernel. */
1028 static int if_fetch(struct interface *ife)
1032 char *ifname = ife->name;
1034 strcpy(ifr.ifr_name, ifname);
1035 if (ioctl(skfd, SIOCGIFFLAGS, &ifr) < 0)
1037 ife->flags = ifr.ifr_flags;
1039 strcpy(ifr.ifr_name, ifname);
1040 if (ioctl(skfd, SIOCGIFHWADDR, &ifr) < 0)
1041 memset(ife->hwaddr, 0, 32);
1043 memcpy(ife->hwaddr, ifr.ifr_hwaddr.sa_data, 8);
1045 ife->type = ifr.ifr_hwaddr.sa_family;
1047 strcpy(ifr.ifr_name, ifname);
1048 if (ioctl(skfd, SIOCGIFMETRIC, &ifr) < 0)
1051 ife->metric = ifr.ifr_metric;
1053 strcpy(ifr.ifr_name, ifname);
1054 if (ioctl(skfd, SIOCGIFMTU, &ifr) < 0)
1057 ife->mtu = ifr.ifr_mtu;
1060 strcpy(ifr.ifr_name, ifname);
1061 if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
1062 ife->map = ifr.ifr_map;
1065 memset(&ife->map, 0, sizeof(struct ifmap));
1067 #ifdef HAVE_TXQUEUELEN
1068 strcpy(ifr.ifr_name, ifname);
1069 if (ioctl(skfd, SIOCGIFTXQLEN, &ifr) < 0)
1070 ife->tx_queue_len = -1; /* unknown value */
1072 ife->tx_queue_len = ifr.ifr_qlen;
1074 ife->tx_queue_len = -1; /* unknown value */
1079 fd = get_socket_for_af(AF_INET);
1081 strcpy(ifr.ifr_name, ifname);
1082 ifr.ifr_addr.sa_family = AF_INET;
1083 if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) {
1085 ife->addr = ifr.ifr_addr;
1086 strcpy(ifr.ifr_name, ifname);
1087 if (ioctl(fd, SIOCGIFDSTADDR, &ifr) < 0)
1088 memset(&ife->dstaddr, 0, sizeof(struct sockaddr));
1090 ife->dstaddr = ifr.ifr_dstaddr;
1092 strcpy(ifr.ifr_name, ifname);
1093 if (ioctl(fd, SIOCGIFBRDADDR, &ifr) < 0)
1094 memset(&ife->broadaddr, 0, sizeof(struct sockaddr));
1096 ife->broadaddr = ifr.ifr_broadaddr;
1098 strcpy(ifr.ifr_name, ifname);
1099 if (ioctl(fd, SIOCGIFNETMASK, &ifr) < 0)
1100 memset(&ife->netmask, 0, sizeof(struct sockaddr));
1102 ife->netmask = ifr.ifr_netmask;
1104 memset(&ife->addr, 0, sizeof(struct sockaddr));
1112 static int do_if_fetch(struct interface *ife)
1114 if (if_fetch(ife) < 0) {
1117 if (errno == ENODEV) {
1118 /* Give better error message for this case. */
1119 errmsg = "Device not found";
1121 errmsg = strerror(errno);
1123 bb_error_msg("%s: error fetching interface information: %s",
1130 /* This structure defines hardware protocols and their handlers. */
1132 const char * const name;
1136 char *(*print) (unsigned char *);
1137 int (*input) (char *, struct sockaddr *);
1138 int (*activate) (int fd);
1139 int suppress_null_addr;
1142 static const struct hwtype unspec_hwtype = {
1143 "unspec", "UNSPEC", -1, 0,
1144 UNSPEC_print, NULL, NULL
1147 static const struct hwtype loop_hwtype = {
1148 "loop", "Local Loopback", ARPHRD_LOOPBACK, 0,
1153 #include <net/if_arp.h>
1155 #if (__GLIBC__ >=2 && __GLIBC_MINOR >= 1) || defined(_NEWLIB_VERSION)
1156 #include <net/ethernet.h>
1158 #include <linux/if_ether.h>
1161 /* Display an Ethernet address in readable format. */
1162 static char *pr_ether(unsigned char *ptr)
1164 static char buff[64];
1166 snprintf(buff, sizeof(buff), "%02X:%02X:%02X:%02X:%02X:%02X",
1167 (ptr[0] & 0377), (ptr[1] & 0377), (ptr[2] & 0377),
1168 (ptr[3] & 0377), (ptr[4] & 0377), (ptr[5] & 0377)
1174 /* Input an Ethernet address and convert to binary. */
1175 static int in_ether(char *bufp, struct sockaddr *sap)
1182 sap->sa_family = ether_hwtype.type;
1187 while ((*bufp != '\0') && (i < ETH_ALEN)) {
1192 else if (c >= 'a' && c <= 'f')
1194 else if (c >= 'A' && c <= 'F')
1198 bb_error_msg("in_ether(%s): invalid ether address!\n", orig);
1207 else if (c >= 'a' && c <= 'f')
1208 val |= c - 'a' + 10;
1209 else if (c >= 'A' && c <= 'F')
1210 val |= c - 'A' + 10;
1211 else if (c == ':' || c == 0)
1215 bb_error_msg("in_ether(%s): invalid ether address!", orig);
1222 *ptr++ = (unsigned char) (val & 0377);
1225 /* We might get a semicolon here - not required. */
1228 if (i == ETH_ALEN) {
1229 bb_error_msg("in_ether(%s): trailing : ignored!", orig);
1237 /* That's it. Any trailing junk? */
1238 if ((i == ETH_ALEN) && (*bufp != '\0')) {
1239 bb_error_msg("in_ether(%s): trailing junk!", orig);
1243 bb_error_msg("in_ether(%s): %s", orig, pr_ether(sap->sa_data));
1248 #endif /* KEEP_UNUSED */
1251 static const struct hwtype ether_hwtype = {
1252 "ether", "Ethernet", ARPHRD_ETHER, ETH_ALEN,
1253 pr_ether, NULL /* UNUSED in_ether */ , NULL
1257 #endif /* HAVE_HWETHER */
1262 #include <net/if_arp.h>
1265 /* Start the PPP encapsulation on the file descriptor. */
1266 static int do_ppp(int fd)
1268 bb_error_msg("You cannot start PPP with this program.");
1271 #endif /* KEEP_UNUSED */
1273 static const struct hwtype ppp_hwtype = {
1274 "ppp", "Point-Point Protocol", ARPHRD_PPP, 0,
1275 NULL, NULL, NULL /* UNUSED do_ppp */ , 0
1279 #endif /* HAVE_PPP */
1281 static const struct hwtype * const hwtypes[] = {
1302 static short sVhwinit = 0;
1304 static void hwinit()
1306 loop_hwtype.title = "Local Loopback";
1307 unspec_hwtype.title = "UNSPEC";
1309 ether_hwtype.title = "Ethernet";
1312 tunnel_hwtype.title = "IPIP Tunnel";
1315 ppp_hwtype.title = "Point-to-Point Protocol";
1319 #endif /* KEEP_UNUSED */
1323 static const char * const if_port_text[][4] = {
1324 /* Keep in step with <linux/netdevice.h> */
1325 {"unknown", NULL, NULL, NULL},
1326 {"10base2", "bnc", "coax", NULL},
1327 {"10baseT", "utp", "tpe", NULL},
1328 {"AUI", "thick", "db15", NULL},
1329 {"100baseT", NULL, NULL, NULL},
1330 {"100baseTX", NULL, NULL, NULL},
1331 {"100baseFX", NULL, NULL, NULL},
1332 {NULL, NULL, NULL, NULL},
1335 static const char * const if_port_text[] = {
1336 /* Keep in step with <linux/netdevice.h> */
1349 /* Check our hardware type table for this type. */
1350 static const struct hwtype *get_hwntype(int type)
1352 const struct hwtype * const *hwp;
1357 #endif /* KEEP_UNUSED */
1360 while (*hwp != NULL) {
1361 if ((*hwp)->type == type)
1368 /* return 1 if address is all zeros */
1369 static int hw_null_address(const struct hwtype *hw, void *ap)
1372 unsigned char *address = (unsigned char *) ap;
1374 for (i = 0; i < hw->alen; i++)
1380 static const char TRext[] = "\0\0\0Ki\0Mi\0Gi\0Ti";
1382 static void print_bytes_scaled(unsigned long long ull, const char *end)
1384 unsigned long long int_part;
1386 unsigned int frac_part;
1395 /* This does correct rounding and is a little larger. But it
1396 * uses KiB as the smallest displayed unit. */
1397 if ((int_part < (1024*1024 - 51)) || !--i) {
1399 int_part += 51; /* 1024*.05 = 51.2 */
1400 frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
1403 ext += 3; /* KiB, MiB, GiB, TiB */
1405 if (int_part >= 1024) {
1406 frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
1408 ext += 3; /* KiB, MiB, GiB, TiB */
1414 printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
1417 static const char * const ife_print_flags_strs[] = {
1436 static const unsigned short ife_print_flags_mask[] = {
1456 static void ife_print(struct interface *ptr)
1459 const struct hwtype *hw;
1461 int can_compress = 0;
1465 char addr6[40], devname[20];
1466 struct sockaddr_in6 sap;
1467 int plen, scope, dad_status, if_idx;
1471 ap = get_afntype(ptr->addr.sa_family);
1473 ap = get_afntype(0);
1477 if (hf == ARPHRD_CSLIP || hf == ARPHRD_CSLIP6)
1480 hw = get_hwntype(hf);
1482 hw = get_hwntype(-1);
1484 printf("%-9.9s Link encap:%s ", ptr->name, hw->title);
1485 /* For some hardware types (eg Ash, ATM) we don't print the
1486 hardware address if it's null. */
1487 if (hw->print != NULL && (!(hw_null_address(hw, ptr->hwaddr) &&
1488 hw->suppress_null_addr)))
1489 printf("HWaddr %s ", hw->print((unsigned char *)ptr->hwaddr));
1491 if (ptr->flags & IFF_PORTSEL) {
1492 printf("Media:%s", if_port_text[ptr->map.port] /* [0] */);
1493 if (ptr->flags & IFF_AUTOMEDIA)
1501 printf(" %s addr:%s ", ap->name,
1502 ap->sprint(&ptr->addr, 1));
1503 if (ptr->flags & IFF_POINTOPOINT) {
1504 printf(" P-t-P:%s ", ap->sprint(&ptr->dstaddr, 1));
1506 if (ptr->flags & IFF_BROADCAST) {
1507 printf(" Bcast:%s ", ap->sprint(&ptr->broadaddr, 1));
1509 printf(" Mask:%s\n", ap->sprint(&ptr->netmask, 1));
1515 #define IPV6_ADDR_ANY 0x0000U
1517 #define IPV6_ADDR_UNICAST 0x0001U
1518 #define IPV6_ADDR_MULTICAST 0x0002U
1519 #define IPV6_ADDR_ANYCAST 0x0004U
1521 #define IPV6_ADDR_LOOPBACK 0x0010U
1522 #define IPV6_ADDR_LINKLOCAL 0x0020U
1523 #define IPV6_ADDR_SITELOCAL 0x0040U
1525 #define IPV6_ADDR_COMPATv4 0x0080U
1527 #define IPV6_ADDR_SCOPE_MASK 0x00f0U
1529 #define IPV6_ADDR_MAPPED 0x1000U
1530 #define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
1532 if ((f = fopen(_PATH_PROCNET_IFINET6, "r")) != NULL) {
1534 (f, "%4s%4s%4s%4s%4s%4s%4s%4s %02x %02x %02x %02x %20s\n",
1535 addr6p[0], addr6p[1], addr6p[2], addr6p[3], addr6p[4],
1536 addr6p[5], addr6p[6], addr6p[7], &if_idx, &plen, &scope,
1537 &dad_status, devname) != EOF) {
1538 if (!strcmp(devname, ptr->name)) {
1539 sprintf(addr6, "%s:%s:%s:%s:%s:%s:%s:%s",
1540 addr6p[0], addr6p[1], addr6p[2], addr6p[3],
1541 addr6p[4], addr6p[5], addr6p[6], addr6p[7]);
1542 inet_pton(AF_INET6, addr6,
1543 (struct sockaddr *) &sap.sin6_addr);
1544 sap.sin6_family = AF_INET6;
1545 printf(" inet6 addr: %s/%d",
1546 inet6_aftype.sprint((struct sockaddr *) &sap, 1),
1549 switch (scope & IPV6_ADDR_SCOPE_MASK) {
1553 case IPV6_ADDR_LINKLOCAL:
1556 case IPV6_ADDR_SITELOCAL:
1559 case IPV6_ADDR_COMPATv4:
1562 case IPV6_ADDR_LOOPBACK:
1576 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
1578 if (ptr->flags == 0) {
1579 printf("[NO FLAGS] ");
1583 if (ptr->flags & ife_print_flags_mask[i]) {
1584 printf(ife_print_flags_strs[i]);
1586 } while (ife_print_flags_mask[++i]);
1589 /* DONT FORGET TO ADD THE FLAGS IN ife_print_short */
1590 printf(" MTU:%d Metric:%d", ptr->mtu, ptr->metric ? ptr->metric : 1);
1591 #ifdef SIOCSKEEPALIVE
1592 if (ptr->outfill || ptr->keepalive)
1593 printf(" Outfill:%d Keepalive:%d", ptr->outfill, ptr->keepalive);
1597 /* If needed, display the interface statistics. */
1599 if (ptr->statistics_valid) {
1600 /* XXX: statistics are currently only printed for the primary address,
1601 * not for the aliases, although strictly speaking they're shared
1606 printf("RX packets:%llu errors:%lu dropped:%lu overruns:%lu frame:%lu\n",
1607 ptr->stats.rx_packets, ptr->stats.rx_errors,
1608 ptr->stats.rx_dropped, ptr->stats.rx_fifo_errors,
1609 ptr->stats.rx_frame_errors);
1611 printf(" compressed:%lu\n",
1612 ptr->stats.rx_compressed);
1614 printf("TX packets:%llu errors:%lu dropped:%lu overruns:%lu carrier:%lu\n",
1615 ptr->stats.tx_packets, ptr->stats.tx_errors,
1616 ptr->stats.tx_dropped, ptr->stats.tx_fifo_errors,
1617 ptr->stats.tx_carrier_errors);
1618 printf(" collisions:%lu ", ptr->stats.collisions);
1620 printf("compressed:%lu ", ptr->stats.tx_compressed);
1621 if (ptr->tx_queue_len != -1)
1622 printf("txqueuelen:%d ", ptr->tx_queue_len);
1624 print_bytes_scaled(ptr->stats.rx_bytes, " T");
1625 print_bytes_scaled(ptr->stats.tx_bytes, "\n");
1629 if ((ptr->map.irq || ptr->map.mem_start || ptr->map.dma ||
1630 ptr->map.base_addr)) {
1633 printf("Interrupt:%d ", ptr->map.irq);
1634 if (ptr->map.base_addr >= 0x100) /* Only print devices using it for
1636 printf("Base address:0x%lx ",
1637 (unsigned long) ptr->map.base_addr);
1638 if (ptr->map.mem_start) {
1639 printf("Memory:%lx-%lx ", ptr->map.mem_start,
1643 printf("DMA chan:%x ", ptr->map.dma);
1650 static int do_if_print(struct interface *ife, void *cookie)
1652 int *opt_a = (int *) cookie;
1655 res = do_if_fetch(ife);
1657 if ((ife->flags & IFF_UP) || *opt_a)
1663 static struct interface *lookup_interface(char *name)
1665 struct interface *ife = NULL;
1667 if (if_readlist_proc(name) < 0)
1669 ife = add_interface(name);
1673 /* for ipv4 add/del modes */
1674 static int if_print(char *ifname)
1679 res = for_all_interfaces(do_if_print, &interface_opt_a);
1681 struct interface *ife;
1683 ife = lookup_interface(ifname);
1684 res = do_if_fetch(ife);
1691 int display_interfaces(char *ifname);
1692 int display_interfaces(char *ifname)
1696 /* Create a channel to the NET kernel. */
1697 if ((skfd = sockets_open(0)) < 0) {
1698 bb_perror_msg_and_die("socket");
1701 /* Do we have to show the current setup? */
1702 status = if_print(ifname);
1703 #ifdef CONFIG_FEATURE_CLEAN_UP