/* vi: set sw=4 ts=4: */
-/* ifconfig
+/*
+ * ifconfig
*
* Similar to the standard Unix ifconfig, but with only the necessary
* parts for AF_INET, and without any printing of if info (for now).
*
* Bjorn Wesen, Axis Communications AB
*
- *
* Authors of the original ifconfig was:
* Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-
/*
* Heavily modified by Manuel Novoa III Mar 6, 2001
*
* 2002-04-20
* IPV6 support added by Bart Visscher <magick@linux-fan.com>
*/
+//config:config IFCONFIG
+//config: bool "ifconfig (12 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Ifconfig is used to configure the kernel-resident network interfaces.
+//config:
+//config:config FEATURE_IFCONFIG_STATUS
+//config: bool "Enable status reporting output (+7k)"
+//config: default y
+//config: depends on IFCONFIG
+//config: help
+//config: If ifconfig is called with no arguments it will display the status
+//config: of the currently active interfaces.
+//config:
+//config:config FEATURE_IFCONFIG_SLIP
+//config: bool "Enable slip-specific options \"keepalive\" and \"outfill\""
+//config: default y
+//config: depends on IFCONFIG
+//config: help
+//config: Allow "keepalive" and "outfill" support for SLIP. If you're not
+//config: planning on using serial lines, leave this unchecked.
+//config:
+//config:config FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ
+//config: bool "Enable options \"mem_start\", \"io_addr\", and \"irq\""
+//config: default y
+//config: depends on IFCONFIG
+//config: help
+//config: Allow the start address for shared memory, start address for I/O,
+//config: and/or the interrupt line used by the specified device.
+//config:
+//config:config FEATURE_IFCONFIG_HW
+//config: bool "Enable option \"hw\" (ether only)"
+//config: default y
+//config: depends on IFCONFIG
+//config: help
+//config: Set the hardware address of this interface, if the device driver
+//config: supports this operation. Currently, we only support the 'ether'
+//config: class.
+//config:
+//config:config FEATURE_IFCONFIG_BROADCAST_PLUS
+//config: bool "Set the broadcast automatically"
+//config: default y
+//config: depends on IFCONFIG
+//config: help
+//config: Setting this will make ifconfig attempt to find the broadcast
+//config: automatically if the value '+' is used.
+
+//applet:IF_IFCONFIG(APPLET(ifconfig, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_IFCONFIG) += ifconfig.o interface.o
+
+//usage:#define ifconfig_trivial_usage
+//usage: IF_FEATURE_IFCONFIG_STATUS("[-a]") " interface [address]"
+//usage:#define ifconfig_full_usage "\n\n"
+//usage: "Configure a network interface\n"
+//usage: "\n"
+//usage: IF_FEATURE_IPV6(
+//usage: " [add ADDRESS[/PREFIXLEN]]\n")
+//usage: IF_FEATURE_IPV6(
+//usage: " [del ADDRESS[/PREFIXLEN]]\n")
+//usage: " [[-]broadcast [ADDRESS]] [[-]pointopoint [ADDRESS]]\n"
+//usage: " [netmask ADDRESS] [dstaddr ADDRESS]\n"
+//usage: IF_FEATURE_IFCONFIG_SLIP(
+//usage: " [outfill NN] [keepalive NN]\n")
+//usage: " " IF_FEATURE_IFCONFIG_HW("[hw ether" IF_FEATURE_HWIB("|infiniband")" ADDRESS] ") "[metric NN] [mtu NN]\n"
+//usage: " [[-]trailers] [[-]arp] [[-]allmulti]\n"
+//usage: " [multicast] [[-]promisc] [txqueuelen NN] [[-]dynamic]\n"
+//usage: IF_FEATURE_IFCONFIG_MEMSTART_IOADDR_IRQ(
+//usage: " [mem_start NN] [io_addr NN] [irq NN]\n")
+//usage: " [up|down] ..."
+#include "libbb.h"
+#include "inet_common.h"
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
-#if defined(__GLIBC__) && __GLIBC__ >=2 && __GLIBC_MINOR__ >= 1
-#include <netpacket/packet.h>
-#include <net/ethernet.h>
-#else
-#include <sys/types.h>
-#include <netinet/if_ether.h>
+#ifdef HAVE_NET_ETHERNET_H
+# include <net/ethernet.h>
#endif
-#include "inet_common.h"
-#include "libbb.h"
#if ENABLE_FEATURE_IFCONFIG_SLIP
-# include <net/if_slip.h>
+# include <linux/if_slip.h>
#endif
/* I don't know if this is needed for busybox or not. Anyone? */
#define ARG_ADD_DEL (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
-/*
- * Set up the tables. Warning! They must have corresponding order!
- */
-
struct arg1opt {
const char *name;
unsigned short selector;
#define ifreq_offsetof(x) offsetof(struct ifreq, x)
+/*
+ * Set up the tables. Warning! They must have corresponding order!
+ */
+
static const struct arg1opt Arg1Opt[] = {
{ "SIFMETRIC", SIOCSIFMETRIC, ifreq_offsetof(ifr_metric) },
{ "SIFMTU", SIOCSIFMTU, ifreq_offsetof(ifr_mtu) },
{ "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.base_addr) },
{ "SIFMAP", SIOCSIFMAP, ifreq_offsetof(ifr_map.irq) },
#endif
- /* Last entry if for unmatched (possibly hostname) arg. */
#if ENABLE_FEATURE_IPV6
{ "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */
{ "DIFADDR", SIOCDIFADDR, ifreq_offsetof(ifr_addr) }, /* IPv6 version ignores the offset */
#endif
+ /* Last entry is for unmatched (assumed to be hostname/address) arg. */
{ "SIFADDR", SIOCSIFADDR, ifreq_offsetof(ifr_addr) },
};
{ NULL, 0, ARG_HOSTNAME, (IFF_UP | IFF_RUNNING) }
};
-/*
- * A couple of prototypes.
- */
-#if ENABLE_FEATURE_IFCONFIG_HW
-static int in_ether(const char *bufp, struct sockaddr *sap);
-#endif
-
-/*
- * Our main function.
- */
int ifconfig_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ifconfig_main(int argc, char **argv)
+int ifconfig_main(int argc UNUSED_PARAM, char **argv)
{
struct ifreq ifr;
struct sockaddr_in sai;
char *p;
/*char host[128];*/
const char *host = NULL; /* make gcc happy */
+ IF_FEATURE_IFCONFIG_STATUS(char *show_all_param;)
did_flags = 0;
#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
/* skip argv[0] */
++argv;
- --argc;
#if ENABLE_FEATURE_IFCONFIG_STATUS
- if (argc > 0 && (argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2])) {
- interface_opt_a = 1;
- --argc;
+ show_all_param = NULL;
+ if (argv[0] && argv[0][0] == '-' && argv[0][1] == 'a' && !argv[0][2]) {
++argv;
+ show_all_param = IFNAME_SHOW_DOWNED_TOO;
}
#endif
- if (argc <= 1) {
+ if (!argv[0] || !argv[1]) { /* one or no args */
#if ENABLE_FEATURE_IFCONFIG_STATUS
- return display_interfaces(argc ? *argv : NULL);
+ return display_interfaces(argv[0] ? argv[0] : show_all_param);
#else
bb_error_msg_and_die("no support for status display");
#endif
sockfd = xsocket(AF_INET, SOCK_DGRAM, 0);
/* get interface name */
- strncpy(ifr.ifr_name, *argv, IFNAMSIZ);
+ strncpy_IFNAMSIZ(ifr.ifr_name, *argv);
/* Process the remaining arguments. */
- while (*++argv != (char *) NULL) {
+ while (*++argv != NULL) {
p = *argv;
mask = N_MASK;
if (*p == '-') { /* If the arg starts with '-'... */
FOUND_ARG:
if (mask & ARG_MASK) {
mask = op->arg_flags;
- a1op = Arg1Opt + (op - OptArray);
if (mask & A_NETMASK & did_flags)
bb_show_usage();
+ a1op = Arg1Opt + (op - OptArray);
if (*++argv == NULL) {
if (mask & A_ARG_REQ)
bb_show_usage();
#if ENABLE_FEATURE_IFCONFIG_HW
if (mask & A_CAST_RESOLVE) {
#endif
-#if ENABLE_FEATURE_IPV6
- char *prefix;
- int prefix_len = 0;
-#endif
- /*safe_strncpy(host, *argv, (sizeof host));*/
host = *argv;
-#if ENABLE_FEATURE_IPV6
- prefix = strchr(host, '/');
- if (prefix) {
- prefix_len = xatou_range(prefix + 1, 0, 128);
- *prefix = '\0';
- }
-#endif
+ if (strcmp(host, "inet") == 0)
+ continue; /* compat stuff */
sai.sin_family = AF_INET;
sai.sin_port = 0;
- if (!strcmp(host, bb_str_default)) {
+ if (strcmp(host, "default") == 0) {
/* Default is special, meaning 0.0.0.0. */
sai.sin_addr.s_addr = INADDR_ANY;
}
#if ENABLE_FEATURE_IFCONFIG_BROADCAST_PLUS
- else if ((host[0] == '+' && !host[1]) && (mask & A_BROADCAST)
+ else if ((host[0] == '+' && !host[1])
+ && (mask & A_BROADCAST)
&& (did_flags & (A_NETMASK|A_HOSTNAME)) == (A_NETMASK|A_HOSTNAME)
) {
/* + is special, meaning broadcast is derived. */
#endif
else {
len_and_sockaddr *lsa;
- if (strcmp(host, "inet") == 0)
- continue; /* compat stuff */
+#if ENABLE_FEATURE_IPV6
+ char *prefix;
+ int prefix_len = 0;
+ prefix = strchr(host, '/');
+ if (prefix) {
+ prefix_len = xatou_range(prefix + 1, 0, 128);
+ *prefix = '\0';
+ }
+ resolve:
+#endif
lsa = xhost2sockaddr(host, 0);
#if ENABLE_FEATURE_IPV6
+ if (lsa->u.sa.sa_family != AF_INET6 && prefix) {
+/* TODO: we do not support "ifconfig eth0 up 1.2.3.4/17".
+ * For now, just make it fail instead of silently ignoring "/17" part:
+ */
+ *prefix = '/';
+ goto resolve;
+ }
if (lsa->u.sa.sa_family == AF_INET6) {
int sockfd6;
struct in6_ifreq ifr6;
- memcpy((char *) &ifr6.ifr6_addr,
- (char *) &(lsa->u.sin6.sin6_addr),
- sizeof(struct in6_addr));
-
- /* Create a channel to the NET kernel. */
sockfd6 = xsocket(AF_INET6, SOCK_DGRAM, 0);
- xioctl(sockfd6, SIOGIFINDEX, &ifr);
+ xioctl(sockfd6, SIOCGIFINDEX, &ifr);
ifr6.ifr6_ifindex = ifr.ifr_ifindex;
ifr6.ifr6_prefixlen = prefix_len;
+ memcpy(&ifr6.ifr6_addr,
+ &lsa->u.sin6.sin6_addr,
+ sizeof(struct in6_addr));
ioctl_or_perror_and_die(sockfd6, a1op->selector, &ifr6, "SIOC%s", a1op->name);
if (ENABLE_FEATURE_CLEAN_UP)
free(lsa);
#if ENABLE_FEATURE_IFCONFIG_HW
} else { /* A_CAST_HOST_COPY_IN_ETHER */
/* This is the "hw" arg case. */
- smalluint hw_class= index_in_substrings("ether\0"
- USE_FEATURE_HWIB("infiniband\0"), *argv) + 1;
+ smalluint hw_class = index_in_substrings("ether\0"
+ IF_FEATURE_HWIB("infiniband\0"), *argv) + 1;
if (!hw_class || !*++argv)
bb_show_usage();
- /*safe_strncpy(host, *argv, sizeof(host));*/
host = *argv;
if (hw_class == 1 ? in_ether(host, &sa) : in_ib(host, &sa))
bb_error_msg_and_die("invalid hw-addr %s", host);
p = (char *) &sa;
}
#endif
- memcpy( (((char *)&ifr) + a1op->ifr_offset),
- p, sizeof(struct sockaddr));
+ memcpy( ((char *)&ifr) + a1op->ifr_offset,
+ p, sizeof(struct sockaddr));
} else {
/* FIXME: error check?? */
unsigned long i = strtoul(*argv, NULL, 0);
if (mask & A_MAP_TYPE) {
xioctl(sockfd, SIOCGIFMAP, &ifr);
if ((mask & A_MAP_UCHAR) == A_MAP_UCHAR)
- *((unsigned char *) p) = i;
+ *(unsigned char *) p = i;
else if (mask & A_MAP_USHORT)
- *((unsigned short *) p) = i;
+ *(unsigned short *) p = i;
else
- *((unsigned long *) p) = i;
+ *(unsigned long *) p = i;
} else
#endif
if (mask & A_CAST_CHAR_PTR)
- *((caddr_t *) p) = (caddr_t) i;
+ *(caddr_t *) p = (caddr_t) i;
else /* A_CAST_INT */
- *((int *) p) = i;
+ *(int *) p = i;
}
ioctl_or_perror_and_die(sockfd, a1op->selector, &ifr, "SIOC%s", a1op->name);
if (!(mask & A_SET_AFTER))
continue;
mask = N_SET;
- }
+ } /* if (mask & ARG_MASK) */
xioctl(sockfd, SIOCGIFFLAGS, &ifr);
selector = op->selector;
close(sockfd);
return 0;
}
-
-#if ENABLE_FEATURE_IFCONFIG_HW
-/* Input an Ethernet address and convert to binary. */
-static int in_ether(const char *bufp, struct sockaddr *sap)
-{
- char *ptr;
- int i, j;
- unsigned char val;
- unsigned char c;
-
- sap->sa_family = ARPHRD_ETHER;
- ptr = (char *) sap->sa_data;
-
- i = 0;
- do {
- j = val = 0;
-
- /* We might get a semicolon here - not required. */
- if (i && (*bufp == ':')) {
- bufp++;
- }
-
- do {
- c = *bufp;
- if (((unsigned char)(c - '0')) <= 9) {
- c -= '0';
- } else if (((unsigned char)((c|0x20) - 'a')) <= 5) {
- c = (c|0x20) - ('a'-10);
- } else if (j && (c == ':' || c == 0)) {
- break;
- } else {
- return -1;
- }
- ++bufp;
- val <<= 4;
- val += c;
- } while (++j < 2);
- *ptr++ = val;
- } while (++i < ETH_ALEN);
-
- return *bufp; /* Error if we don't end at end of string. */
-}
-#endif
projects / oweals / busybox.git / blobdiff