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hush/networking/interface.c
Rob Landley 9b5a99ad21 Patch from Robert P. Day to remove #ifdefed out SLIP support code that we 
have no CONFIG option to enable, and which existing SLIP users don't seem
to miss.
2006-05-19 22:54:42 +00:00

1708 lines
38 KiB
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/*
* stolen from net-tools-1.59 and stripped down for busybox by
* Erik Andersen <andersen@codepoet.org>
*
* Heavily modified by Manuel Novoa III Mar 12, 2001
*
* Pruned unused code using KEEP_UNUSED define.
* Added print_bytes_scaled function to reduce code size.
* Added some (potentially) missing defines.
* Improved display support for -a and for a named interface.
*
* -----------------------------------------------------------
*
* 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 1.25 2004/08/26 21:45:21 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)
*/
/* #define KEEP_UNUSED */
/*
*
* Protocol Families.
*
*/
#define HAVE_AFINET 1
/*
*
* Device Hardware types.
*
*/
#define HAVE_HWETHER 1
#define HAVE_HWPPP 1
#include "inet_common.h"
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <net/if.h>
#include <net/if_arp.h>
#include "busybox.h"
#ifdef CONFIG_FEATURE_IPV6
# define HAVE_AFINET6 1
#else
# undef HAVE_AFINET6
#endif
#define _PATH_PROCNET_DEV "/proc/net/dev"
#define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
#define new(p) ((p) = xcalloc(1,sizeof(*(p))))
#if HAVE_AFINET6
#ifndef _LINUX_IN6_H
/*
* This is in linux/include/net/ipv6.h.
*/
struct in6_ifreq {
struct in6_addr ifr6_addr;
uint32_t ifr6_prefixlen;
unsigned int ifr6_ifindex;
};
#endif
#endif /* HAVE_AFINET6 */
/* Defines for glibc2.0 users. */
#ifndef SIOCSIFTXQLEN
#define SIOCSIFTXQLEN 0x8943
#define SIOCGIFTXQLEN 0x8942
#endif
/* ifr_qlen is ifru_ivalue, but it isn't present in 2.0 kernel headers */
#ifndef ifr_qlen
#define ifr_qlen ifr_ifru.ifru_mtu
#endif
#ifndef HAVE_TXQUEUELEN
#define HAVE_TXQUEUELEN 1
#endif
#ifndef IFF_DYNAMIC
#define IFF_DYNAMIC 0x8000 /* dialup device with changing addresses */
#endif
/* This structure defines protocol families and their handlers. */
struct aftype {
const char *name;
const 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;
};
#ifdef KEEP_UNUSED
static int flag_unx;
static int flag_inet;
static struct aftrans_t {
char *alias;
char *name;
int *flag;
} aftrans[] = {
{
"ip", "inet", &flag_inet},
#ifdef HAVE_AFINET6
{
"ip6", "inet6", &flag_inet6},
#endif
{
"inet", "inet", &flag_inet},
#ifdef HAVE_AFINET6
{
"inet6", "inet6", &flag_inet6},
#endif
{
"unix", "unix", &flag_unx}, {
"tcpip", "inet", &flag_inet},
{
0, 0, 0}
};
static char afname[256] = "";
#endif /* KEEP_UNUSED */
#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));
}
static struct aftype unix_aftype = {
"unix", "UNIX Domain", AF_UNIX, 0,
UNIX_print, UNIX_sprint, NULL, NULL,
NULL, NULL, NULL,
-1,
"/proc/net/unix"
};
#endif /* HAVE_AFUNIX */
#if HAVE_AFINET
#ifdef KEEP_UNUSED
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)));
}
#endif /* KEEP_UNUSED */
/* 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);
}
#ifdef KEEP_UNUSED
static 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;
}
#endif /* KEEP_UNUSED */
static struct aftype inet_aftype = {
"inet", "DARPA Internet", AF_INET, sizeof(unsigned long),
NULL /* UNUSED INET_print */ , INET_sprint,
NULL /* UNUSED INET_input */ , NULL /* UNUSED INET_reserror */ ,
NULL /*INET_rprint */ , NULL /*INET_rinput */ ,
NULL /* UNUSED INET_getnetmask */ ,
-1,
NULL
};
#endif /* HAVE_AFINET */
#if HAVE_AFINET6
#ifdef KEEP_UNUSED
static void INET6_reserror(char *text)
{
herror(text);
}
/* Display an Internet socket address. */
static char *INET6_print(unsigned char *ptr)
{
static char name[80];
inet_ntop(AF_INET6, (struct in6_addr *) ptr, name, 80);
return name;
}
#endif /* KEEP_UNUSED */
/* Display an Internet socket address. */
/* dirty! struct sockaddr usually doesn't suffer for inet6 addresses, fst. */
static char *INET6_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 (INET6_rresolve
(buff, sizeof(buff), (struct sockaddr_in6 *) sap, numeric) != 0)
return safe_strncpy(buff, _("[UNKNOWN]"), sizeof(buff));
return (buff);
}
#ifdef KEEP_UNUSED
static int INET6_getsock(char *bufp, struct sockaddr *sap)
{
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *) sap;
sin6->sin6_family = AF_INET6;
sin6->sin6_port = 0;
if (inet_pton(AF_INET6, bufp, sin6->sin6_addr.s6_addr) <= 0)
return (-1);
return 16; /* ?;) */
}
static int INET6_input(int type, char *bufp, struct sockaddr *sap)
{
switch (type) {
case 1:
return (INET6_getsock(bufp, sap));
default:
return (INET6_resolve(bufp, (struct sockaddr_in6 *) sap));
}
}
#endif /* KEEP_UNUSED */
static struct aftype inet6_aftype = {
"inet6", "IPv6", AF_INET6, sizeof(struct in6_addr),
NULL /* UNUSED INET6_print */ , INET6_sprint,
NULL /* UNUSED INET6_input */ , NULL /* UNUSED INET6_reserror */ ,
NULL /*INET6_rprint */ , NULL /*INET6_rinput */ ,
NULL /* UNUSED INET6_getnetmask */ ,
-1,
NULL
};
#endif /* HAVE_AFINET6 */
/* Display an UNSPEC address. */
static char *UNSPEC_print(unsigned char *ptr)
{
static char buff[sizeof(struct sockaddr) * 3 + 1];
char *pos;
unsigned int i;
pos = buff;
for (i = 0; i < sizeof(struct sockaddr); i++) {
/* careful -- not every libc's sprintf returns # bytes written */
sprintf(pos, "%02X-", (*ptr++ & 0377));
pos += 3;
}
/* Erase trailing "-". Works as long as sizeof(struct sockaddr) != 0 */
*--pos = '\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((unsigned char *)sap->sa_data));
}
static struct aftype unspec_aftype = {
"unspec", "UNSPEC", AF_UNSPEC, 0,
UNSPEC_print, UNSPEC_sprint, NULL, NULL,
NULL,
};
static struct aftype * const aftypes[] = {
#if HAVE_AFUNIX
&unix_aftype,
#endif
#if HAVE_AFINET
&inet_aftype,
#endif
#if HAVE_AFINET6
&inet6_aftype,
#endif
&unspec_aftype,
NULL
};
#ifdef KEEP_UNUSED
static short sVafinit = 0;
static 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
sVafinit = 1;
}
static 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 = strchr(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)) {
bb_error_msg(_("Too many address family arguments."));
return (0);
}
if (paft->flag)
(*paft->flag)++;
if (afname[0])
strcat(afname, ",");
strcat(afname, paft->name);
break;
}
if (!paft->alias) {
bb_error_msg(_("Unknown address family `%s'."), tmp1);
return (1);
}
tmp1 = tmp2;
}
return (0);
}
/* set the default AF list from the program name or a constant value */
static 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. */
static struct aftype *get_aftype(const char *name)
{
struct aftype * const *afp;
#ifdef KEEP_UNUSED
if (!sVafinit)
afinit();
#endif /* KEEP_UNUSED */
afp = aftypes;
while (*afp != NULL) {
if (!strcmp((*afp)->name, name))
return (*afp);
afp++;
}
if (strchr(name, ','))
bb_error_msg(_("Please don't supply more than one address family."));
return (NULL);
}
#endif /* KEEP_UNUSED */
/* Check our protocol family table for this family. */
static struct aftype *get_afntype(int af)
{
struct aftype * const *afp;
#ifdef KEEP_UNUSED
if (!sVafinit)
afinit();
#endif /* KEEP_UNUSED */
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 */
static int get_socket_for_af(int af)
{
struct aftype * const *afp;
#ifdef KEEP_UNUSED
if (!sVafinit)
afinit();
#endif /* KEEP_UNUSED */
afp = aftypes;
while (*afp != NULL) {
if ((*afp)->af == af)
return (*afp)->fd;
afp++;
}
return -1;
}
#ifdef KEEP_UNUSED
/* type: 0=all, 1=getroute */
static void print_aflist(int type)
{
int count = 0;
char *txt;
struct aftype * const *afp;
#ifdef KEEP_UNUSED
if (!sVafinit)
afinit();
#endif /* KEEP_UNUSED */
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");
}
#endif /* KEEP_UNUSED */
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 */
int has_ip;
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 interface_opt_a = 0; /* show all interfaces */
#ifdef KEEP_UNUSED
static int opt_i = 0; /* show the statistics */
static int opt_v = 0; /* debugging output flag */
static int addr_family = 0; /* currently selected AF */
#endif /* KEEP_UNUSED */
static struct interface *int_list, *int_last;
static int skfd = -1; /* generic raw socket desc. */
static int sockets_open(int family)
{
struct aftype * const *aft;
int sfd = -1;
static int force = -1;
if (force < 0) {
force = 0;
if (get_linux_version_code() < KERNEL_VERSION(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;
}
af->fd = socket(af->af, type, 0);
if (af->fd >= 0)
sfd = af->fd;
}
if (sfd < 0) {
bb_error_msg(_("No usable address families found."));
}
return sfd;
}
#ifdef CONFIG_FEATURE_CLEAN_UP
static void sockets_close(void)
{
struct aftype * const *aft;
for (aft = aftypes; *aft != NULL; aft++) {
struct aftype *af = *aft;
if( af->fd != -1 ) {
close(af->fd);
af->fd = -1;
}
}
}
#endif
/* like strcmp(), but knows about numbers */
static int nstrcmp(const char *a, const char *b)
{
const char *a_ptr = a;
const char *b_ptr = b;
while (*a == *b) {
if (*a == '\0') {
return 0;
}
if (!isdigit(*a) && isdigit(*(a+1))) {
a_ptr = a+1;
b_ptr = b+1;
}
a++;
b++;
}
if (isdigit(*a) && isdigit(*b)) {
return atoi(a_ptr) > atoi(b_ptr) ? 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 skfd2;
/* SIOCGIFCONF currently seems to only work properly on AF_INET sockets
(as of 2.1.128) */
skfd2 = get_socket_for_af(AF_INET);
if (skfd2 < 0) {
bb_perror_msg(("warning: no inet socket available"));
/* Try to soldier on with whatever socket we can get hold of. */
skfd2 = sockets_open(0);
if (skfd2 < 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(skfd2, 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)
{
/* Extract <name>[:<alias>] from nul-terminated p where p matches
<name>[:<alias>]: after leading whitespace.
If match is not made, set name empty and return unchanged p */
int namestart=0, nameend=0, aliasend;
while (isspace(p[namestart]))
namestart++;
nameend=namestart;
while (p[nameend] && p[nameend]!=':' && !isspace(p[nameend]))
nameend++;
if (p[nameend]==':') {
aliasend=nameend+1;
while (p[aliasend] && isdigit(p[aliasend]))
aliasend++;
if (p[aliasend]==':') {
nameend=aliasend;
}
if ((nameend-namestart)<IFNAMSIZ) {
memcpy(name,&p[namestart],nameend-namestart);
name[nameend-namestart]='\0';
p=&p[nameend];
} else {
/* Interface name too large */
name[0]='\0';
}
} else {
/* first ':' not found - return empty */
name[0]='\0';
}
return p + 1;
}
/* If scanf supports size qualifiers for %n conversions, then we can
* use a modified fmt that simply stores the position in the fields
* having no associated fields in the proc string. Of course, we need
* to zero them again when we're done. But that is smaller than the
* old approach of multiple scanf occurrences with large numbers of
* args. */
/* static const char * const ss_fmt[] = { */
/* "%lln%llu%lu%lu%lu%lu%ln%ln%lln%llu%lu%lu%lu%lu%lu", */
/* "%llu%llu%lu%lu%lu%lu%ln%ln%llu%llu%lu%lu%lu%lu%lu", */
/* "%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu" */
/* }; */
/* Lie about the size of the int pointed to for %n. */
#if INT_MAX == LONG_MAX
static const char * const ss_fmt[] = {
"%n%llu%u%u%u%u%n%n%n%llu%u%u%u%u%u",
"%llu%llu%u%u%u%u%n%n%llu%llu%u%u%u%u%u",
"%llu%llu%u%u%u%u%u%u%llu%llu%u%u%u%u%u%u"
};
#else
static const char * const ss_fmt[] = {
"%n%llu%lu%lu%lu%lu%n%n%n%llu%lu%lu%lu%lu%lu",
"%llu%llu%lu%lu%lu%lu%n%n%llu%llu%lu%lu%lu%lu%lu",
"%llu%llu%lu%lu%lu%lu%lu%lu%llu%llu%lu%lu%lu%lu%lu%lu"
};
#endif
static void get_dev_fields(char *bp, struct interface *ife, int procnetdev_vsn)
{
memset(&ife->stats, 0, sizeof(struct user_net_device_stats));
sscanf(bp, ss_fmt[procnetdev_vsn],
&ife->stats.rx_bytes, /* missing for 0 */
&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, /* missing for <= 1 */
&ife->stats.rx_multicast, /* missing for <= 1 */
&ife->stats.tx_bytes, /* missing for 0 */
&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 /* missing for <= 1 */
);
if (procnetdev_vsn <= 1) {
if (procnetdev_vsn == 0) {
ife->stats.rx_bytes = 0;
ife->stats.tx_bytes = 0;
}
ife->stats.rx_multicast = 0;
ife->stats.rx_compressed = 0;
ife->stats.tx_compressed = 0;
}
}
static inline int procnetdev_version(char *buf)
{
if (strstr(buf, "compressed"))
return 2;
if (strstr(buf, "bytes"))
return 1;
return 0;
}
static int if_readlist_proc(char *target)
{
static int proc_read;
FILE *fh;
char buf[512];
struct interface *ife;
int err, procnetdev_vsn;
if (proc_read)
return 0;
if (!target)
proc_read = 1;
fh = fopen(_PATH_PROCNET_DEV, "r");
if (!fh) {
bb_perror_msg(_("Warning: cannot open %s. Limited output."), _PATH_PROCNET_DEV);
return if_readconf();
}
fgets(buf, sizeof buf, fh); /* eat line */
fgets(buf, sizeof buf, fh);
procnetdev_vsn = procnetdev_version(buf);
err = 0;
while (fgets(buf, sizeof buf, fh)) {
char *s, name[128];
s = get_name(name, buf);
ife = add_interface(name);
get_dev_fields(s, ife, procnetdev_vsn);
ife->statistics_valid = 1;
if (target && !strcmp(target, name))
break;
}
if (ferror(fh)) {
perror(_PATH_PROCNET_DEV);
err = -1;
proc_read = 0;
}
fclose(fh);
return err;
}
static int if_readlist(void)
{
int err = if_readlist_proc(NULL);
if (!err)
err = if_readconf();
return err;
}
static 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;
}
/* Fetch the interface configuration from the kernel. */
static 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 SIOCGIFMAP
strcpy(ifr.ifr_name, ifname);
if (ioctl(skfd, SIOCGIFMAP, &ifr) == 0)
ife->map = ifr.ifr_map;
else
#endif
memset(&ife->map, 0, sizeof(struct ifmap));
#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
return 0;
}
static 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);
}
bb_error_msg(_("%s: error fetching interface information: %s"),
ife->name, errmsg);
return -1;
}
return 0;
}
/* This structure defines hardware protocols and their handlers. */
struct hwtype {
const char * const name;
const char *title;
int type;
int alen;
char *(*print) (unsigned char *);
int (*input) (char *, struct sockaddr *);
int (*activate) (int fd);
int suppress_null_addr;
};
static const struct hwtype unspec_hwtype = {
"unspec", "UNSPEC", -1, 0,
UNSPEC_print, NULL, NULL
};
static const struct hwtype loop_hwtype = {
"loop", "Local Loopback", ARPHRD_LOOPBACK, 0,
NULL, NULL, NULL
};
#if HAVE_HWETHER
#include <net/if_arp.h>
#if (__GLIBC__ >=2 && __GLIBC_MINOR >= 1) || defined(_NEWLIB_VERSION)
#include <net/ethernet.h>
#else
#include <linux/if_ether.h>
#endif
/* 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);
}
#ifdef KEEP_UNUSED
/* 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
bb_error_msg(_("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
bb_error_msg(_("in_ether(%s): invalid ether address!"), 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 == ':') {
#ifdef DEBUG
if (i == ETH_ALEN) {
bb_error_msg(_("in_ether(%s): trailing : ignored!"), orig);
}
#endif
bufp++;
}
}
#ifdef DEBUG
/* That's it. Any trailing junk? */
if ((i == ETH_ALEN) && (*bufp != '\0')) {
bb_error_msg(_("in_ether(%s): trailing junk!"), orig);
errno = EINVAL;
return (-1);
}
bb_error_msg("in_ether(%s): %s", orig, pr_ether(sap->sa_data));
#endif
return (0);
}
#endif /* KEEP_UNUSED */
static const struct hwtype ether_hwtype = {
"ether", "Ethernet", ARPHRD_ETHER, ETH_ALEN,
pr_ether, NULL /* UNUSED in_ether */ , NULL
};
#endif /* HAVE_HWETHER */
#if HAVE_HWPPP
#include <net/if_arp.h>
#ifdef KEEP_UNUSED
/* Start the PPP encapsulation on the file descriptor. */
static int do_ppp(int fd)
{
bb_error_msg(_("You cannot start PPP with this program."));
return -1;
}
#endif /* KEEP_UNUSED */
static const struct hwtype ppp_hwtype = {
"ppp", "Point-Point Protocol", ARPHRD_PPP, 0,
NULL, NULL, NULL /* UNUSED do_ppp */ , 0
};
#endif /* HAVE_PPP */
static const struct hwtype * const hwtypes[] = {
&loop_hwtype,
#if HAVE_HWSTRIP
&strip_hwtype,
#endif
#if HAVE_HWETHER
&ether_hwtype,
#endif
#if HAVE_HWTUNNEL
&tunnel_hwtype,
#endif
#if HAVE_HWPPP
&ppp_hwtype,
#endif
&unspec_hwtype,
NULL
};
#ifdef KEEP_UNUSED
static short sVhwinit = 0;
static void hwinit()
{
loop_hwtype.title = _("Local Loopback");
unspec_hwtype.title = _("UNSPEC");
#if HAVE_HWETHER
ether_hwtype.title = _("Ethernet");
#endif
#if HAVE_HWTUNNEL
tunnel_hwtype.title = _("IPIP Tunnel");
#endif
#if HAVE_HWPPP
ppp_hwtype.title = _("Point-to-Point Protocol");
#endif
sVhwinit = 1;
}
#endif /* KEEP_UNUSED */
#ifdef IFF_PORTSEL
#if 0
static const char * const 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},
};
#else
static const char * const if_port_text[] = {
/* Keep in step with <linux/netdevice.h> */
"unknown",
"10base2",
"10baseT",
"AUI",
"100baseT",
"100baseTX",
"100baseFX",
NULL
};
#endif
#endif
/* Check our hardware type table for this type. */
static const struct hwtype *get_hwntype(int type)
{
const struct hwtype * const *hwp;
#ifdef KEEP_UNUSED
if (!sVhwinit)
hwinit();
#endif /* KEEP_UNUSED */
hwp = hwtypes;
while (*hwp != NULL) {
if ((*hwp)->type == type)
return (*hwp);
hwp++;
}
return (NULL);
}
/* return 1 if address is all zeros */
static int hw_null_address(const 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;
}
static const char TRext[] = "\0\0\0Ki\0Mi\0Gi\0Ti";
static void print_bytes_scaled(unsigned long long ull, const char *end)
{
unsigned long long int_part;
const char *ext;
unsigned int frac_part;
int i;
frac_part = 0;
ext = TRext;
int_part = ull;
i = 4;
do {
#if 0
/* This does correct rounding and is a little larger. But it
* uses KiB as the smallest displayed unit. */
if ((int_part < (1024*1024 - 51)) || !--i) {
i = 0;
int_part += 51; /* 1024*.05 = 51.2 */
frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
}
int_part /= 1024;
ext += 3; /* KiB, MiB, GiB, TiB */
#else
if (int_part >= 1024) {
frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
int_part /= 1024;
ext += 3; /* KiB, MiB, GiB, TiB */
}
--i;
#endif
} while (i);
printf("X bytes:%llu (%llu.%u %sB)%s", ull, int_part, frac_part, ext, end);
}
static const char * const ife_print_flags_strs[] = {
"UP ",
"BROADCAST ",
"DEBUG ",
"LOOPBACK ",
"POINTOPOINT ",
"NOTRAILERS ",
"RUNNING ",
"NOARP ",
"PROMISC ",
"ALLMULTI ",
"SLAVE ",
"MASTER ",
"MULTICAST ",
#ifdef HAVE_DYNAMIC
"DYNAMIC "
#endif
};
static const unsigned short ife_print_flags_mask[] = {
IFF_UP,
IFF_BROADCAST,
IFF_DEBUG,
IFF_LOOPBACK,
IFF_POINTOPOINT,
IFF_NOTRAILERS,
IFF_RUNNING,
IFF_NOARP,
IFF_PROMISC,
IFF_ALLMULTI,
IFF_SLAVE,
IFF_MASTER,
IFF_MULTICAST,
#ifdef HAVE_DYNAMIC
IFF_DYNAMIC
#endif
0
};
static void ife_print(struct interface *ptr)
{
struct aftype *ap;
const struct hwtype *hw;
int hf;
int can_compress = 0;
#if HAVE_AFINET6
FILE *f;
char addr6[40], devname[20];
struct sockaddr_in6 sap;
int plen, scope, dad_status, if_idx;
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((unsigned char *)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
#define IPV6_ADDR_ANY 0x0000U
#define IPV6_ADDR_UNICAST 0x0001U
#define IPV6_ADDR_MULTICAST 0x0002U
#define IPV6_ADDR_ANYCAST 0x0004U
#define IPV6_ADDR_LOOPBACK 0x0010U
#define IPV6_ADDR_LINKLOCAL 0x0020U
#define IPV6_ADDR_SITELOCAL 0x0040U
#define IPV6_ADDR_COMPATv4 0x0080U
#define IPV6_ADDR_SCOPE_MASK 0x00f0U
#define IPV6_ADDR_MAPPED 0x1000U
#define IPV6_ADDR_RESERVED 0x2000U /* reserved address space */
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]);
inet_pton(AF_INET6, addr6,
(struct sockaddr *) &sap.sin6_addr);
sap.sin6_family = AF_INET6;
printf(_(" inet6 addr: %s/%d"),
inet6_aftype.sprint((struct sockaddr *) &sap, 1),
plen);
printf(_(" Scope:"));
switch (scope & IPV6_ADDR_SCOPE_MASK) {
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
printf(" ");
/* DONT FORGET TO ADD THE FLAGS IN ife_print_short, too */
if (ptr->flags == 0) {
printf(_("[NO FLAGS] "));
} else {
int i = 0;
do {
if (ptr->flags & ife_print_flags_mask[i]) {
printf(_(ife_print_flags_strs[i]));
}
} while (ife_print_flags_mask[++i]);
}
/* 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);
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 R");
print_bytes_scaled(ptr->stats.rx_bytes, " T");
print_bytes_scaled(ptr->stats.tx_bytes, "\n");
}
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%lx "),
(unsigned long) 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");
}
static 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;
}
static 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, &interface_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(char *ifname);
int display_interfaces(char *ifname)
{
int status;
/* Create a channel to the NET kernel. */
if ((skfd = sockets_open(0)) < 0) {
bb_perror_msg_and_die("socket");
}
/* Do we have to show the current setup? */
status = if_print(ifname);
#ifdef CONFIG_FEATURE_CLEAN_UP
sockets_close();
#endif
exit(status < 0);
}
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