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hush/networking/interface.c

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/* vi: set sw=4 ts=4: */
/*
* 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
*
* 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
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*
* 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)
*/
#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"
#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;
};
/* 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);
}
static struct aftype inet_aftype = {
.name = "inet",
.title = "DARPA Internet",
.af = AF_INET,
.alen = 4,
.sprint = INET_sprint,
.fd = -1
};
#if HAVE_AFINET6
/* 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);
}
static struct aftype inet6_aftype = {
.name = "inet6",
.title = "IPv6",
.af = AF_INET6,
.alen = sizeof(struct in6_addr),
.sprint = INET6_sprint,
.fd = -1
};
#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[] = {
&inet_aftype,
#if HAVE_AFINET6
&inet6_aftype,
#endif
&unspec_aftype,
NULL
};
/* Check our protocol family table for this family. */
static struct aftype *get_afntype(int af)
{
struct aftype * const *afp;
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;
afp = aftypes;
while (*afp != NULL) {
if ((*afp)->af == af)
return (*afp)->fd;
afp++;
}
return -1;
}
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 */
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 xatoul(a_ptr) > xatoul(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 = xzalloc(sizeof(*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> from nul-terminated p where p matches
<name>: after leading whitespace.
If match is not made, set name empty and return unchanged p */
int namestart=0, nameend=0;
while (isspace(p[namestart]))
namestart++;
nameend=namestart;
while (p[nameend] && p[nameend]!=':' && !isspace(p[nameend]))
nameend++;
if (p[nameend]==':') {
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 {
/* trailing ':' 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, limiting 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
/* 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));
}
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 = {
.name = "unspec",
.title = "UNSPEC",
.type = -1,
.print = UNSPEC_print
};
static const struct hwtype loop_hwtype = {
.name = "loop",
.title = "Local Loopback",
.type = ARPHRD_LOOPBACK
};
#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);
}
static const struct hwtype ether_hwtype = {
.name = "ether",
.title = "Ethernet",
.type = ARPHRD_ETHER,
.alen = ETH_ALEN,
.print = pr_ether
};
#include <net/if_arp.h>
static const struct hwtype ppp_hwtype = {
.name = "ppp",
.title = "Point-to-Point Protocol",
.type = ARPHRD_PPP
};
#ifdef CONFIG_FEATURE_IPV6
static const struct hwtype sit_hwtype = {
.name = "sit",
.title = "IPv6-in-IPv4",
.type = ARPHRD_SIT,
.print = UNSPEC_print,
.suppress_null_addr = 1
} ;
#endif
static const struct hwtype * const hwtypes[] = {
&loop_hwtype,
&ether_hwtype,
&ppp_hwtype,
&unspec_hwtype,
#ifdef CONFIG_FEATURE_IPV6
&sit_hwtype,
#endif
NULL
};
#ifdef IFF_PORTSEL
static const char * const if_port_text[] = {
/* Keep in step with <linux/netdevice.h> */
"unknown",
"10base2",
"10baseT",
"AUI",
"100baseT",
"100baseTX",
"100baseFX",
NULL
};
#endif
/* Check our hardware type table for this type. */
static const struct hwtype *get_hwntype(int type)
{
const struct hwtype * const *hwp;
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 (int_part >= 1024) {
frac_part = ((((unsigned int) int_part) & (1024-1)) * 10) / 1024;
int_part /= 1024;
ext += 3; /* KiB, MiB, GiB, TiB */
}
--i;
} 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 (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));
}
#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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