*
* modified for getopt32 by Arne Bernin <arne [at] alamut.de>
*/
+//config:config ARP
+//config: bool "arp (11 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Manipulate the system ARP cache.
+
+//applet:IF_ARP(APPLET(arp, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_ARP) += arp.o interface.o
+
+//usage:#define arp_trivial_usage
+//usage: "\n[-vn] [-H HWTYPE] [-i IF] -a [HOSTNAME]"
+//usage: "\n[-v] [-i IF] -d HOSTNAME [pub]"
+//usage: "\n[-v] [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [temp]"
+//usage: "\n[-v] [-H HWTYPE] [-i IF] -s HOSTNAME HWADDR [netmask MASK] pub"
+//usage: "\n[-v] [-H HWTYPE] [-i IF] -Ds HOSTNAME IFACE [netmask MASK] pub"
+//usage:#define arp_full_usage "\n\n"
+//usage: "Manipulate ARP cache\n"
+//usage: "\n -a Display (all) hosts"
+//usage: "\n -d Delete ARP entry"
+//usage: "\n -s Set new entry"
+//usage: "\n -v Verbose"
+//usage: "\n -n Don't resolve names"
+//usage: "\n -i IF Network interface"
+//usage: "\n -D Read HWADDR from IFACE"
+//usage: "\n -A,-p AF Protocol family"
+//usage: "\n -H HWTYPE Hardware address type"
#include "libbb.h"
+#include "common_bufsiz.h"
#include "inet_common.h"
#include <arpa/inet.h>
#define DFLT_AF "inet"
#define DFLT_HW "ether"
-#define ARP_OPT_A (0x1)
-#define ARP_OPT_p (0x2)
-#define ARP_OPT_H (0x4)
-#define ARP_OPT_t (0x8)
-#define ARP_OPT_i (0x10)
-#define ARP_OPT_a (0x20)
-#define ARP_OPT_d (0x40)
-#define ARP_OPT_n (0x80) /* do not resolve addresses */
-#define ARP_OPT_D (0x100) /* HW-address is devicename */
-#define ARP_OPT_s (0x200)
-#define ARP_OPT_v (0x400 * DEBUG) /* debugging output flag */
-
-
-static const struct aftype *ap; /* current address family */
-static const struct hwtype *hw; /* current hardware type */
-static int sockfd; /* active socket descriptor */
-static smallint hw_set; /* flag if hw-type was set (-H) */
-static const char *device = ""; /* current device */
+enum {
+ ARP_OPT_A = (1 << 0),
+ ARP_OPT_p = (1 << 1),
+ ARP_OPT_H = (1 << 2),
+ ARP_OPT_t = (1 << 3),
+ ARP_OPT_i = (1 << 4),
+ ARP_OPT_a = (1 << 5),
+ ARP_OPT_d = (1 << 6),
+ ARP_OPT_n = (1 << 7), /* do not resolve addresses */
+ ARP_OPT_D = (1 << 8), /* HW-address is devicename */
+ ARP_OPT_s = (1 << 9),
+ ARP_OPT_v = (1 << 10) * DEBUG, /* debugging output flag */
+};
+
+enum {
+ sockfd = 3, /* active socket descriptor */
+};
+
+struct globals {
+ const struct aftype *ap; /* current address family */
+ const struct hwtype *hw; /* current hardware type */
+ const char *device; /* current device */
+ smallint hw_set; /* flag if hw-type was set (-H) */
+} FIX_ALIASING;
+#define G (*(struct globals*)bb_common_bufsiz1)
+#define ap (G.ap )
+#define hw (G.hw )
+#define device (G.device )
+#define hw_set (G.hw_set )
+#define INIT_G() do { \
+ setup_common_bufsiz(); \
+ device = ""; \
+} while (0)
+
static const char options[] ALIGN1 =
"pub\0"
if (flags == 0)
flags = 3;
- strncpy(req.arp_dev, device, sizeof(req.arp_dev));
+ strncpy_IFNAMSIZ(req.arp_dev, device);
err = -1;
}
/* Get the hardware address to a specified interface name */
-static void arp_getdevhw(char *ifname, struct sockaddr *sa,
- const struct hwtype *hwt)
+static void arp_getdevhw(char *ifname, struct sockaddr *sa)
{
struct ifreq ifr;
const struct hwtype *xhw;
- strcpy(ifr.ifr_name, ifname);
+ strncpy_IFNAMSIZ(ifr.ifr_name, ifname);
ioctl_or_perror_and_die(sockfd, SIOCGIFHWADDR, &ifr,
- "cant get HW-Address for '%s'", ifname);
- if (hwt && (ifr.ifr_hwaddr.sa_family != hw->type)) {
+ "can't get HW-Address for '%s'", ifname);
+ if (hw_set && (ifr.ifr_hwaddr.sa_family != hw->type)) {
bb_error_msg_and_die("protocol type mismatch");
}
memcpy(sa, &(ifr.ifr_hwaddr), sizeof(struct sockaddr));
xhw = get_hwntype(-1);
}
bb_error_msg("device '%s' has HW address %s '%s'",
- ifname, xhw->name,
- xhw->print((unsigned char *) &ifr.ifr_hwaddr.sa_data));
+ ifname, xhw->name,
+ xhw->print((unsigned char *) &ifr.ifr_hwaddr.sa_data));
}
}
bb_error_msg_and_die("need hardware address");
}
if (option_mask32 & ARP_OPT_D) {
- arp_getdevhw(*args++, &req.arp_ha, hw_set ? hw : NULL);
+ arp_getdevhw(*args++, &req.arp_ha);
} else {
if (hw->input(*args++, &req.arp_ha) < 0) {
bb_error_msg_and_die("invalid hardware address");
/* Fill in the remainder of the request. */
req.arp_flags = flags;
- strncpy(req.arp_dev, device, sizeof(req.arp_dev));
+ strncpy_IFNAMSIZ(req.arp_dev, device);
/* Call the kernel. */
if (option_mask32 & ARP_OPT_v)
/* Print the contents of an ARP request block. */
static void
arp_disp(const char *name, char *ip, int type, int arp_flags,
- char *hwa, char *mask, char *dev)
+ char *hwa, char *mask, char *dev)
{
static const int arp_masks[] = {
ATF_PERM, ATF_PUBL,
/* All these strings can't overflow
* because fgets above reads limited amount of data */
num = sscanf(line, "%s 0x%x 0x%x %s %s %s\n",
- ip, &type, &flags, hwa, mask, dev);
+ ip, &type, &flags, hwa, mask, dev);
if (num < 4)
break;
arp_disp(hostname, ip, type, flags, hwa, mask, dev);
}
if (option_mask32 & ARP_OPT_v)
- printf("Entries: %d\tSkipped: %d\tFound: %d\n",
- entries, entries - shown, shown);
+ printf("Entries: %u\tSkipped: %u\tFound: %u\n",
+ entries, entries - shown, shown);
if (!shown) {
if (hw_set || host || device[0])
- printf("No match found in %d entries\n", entries);
+ printf("No match found in %u entries\n", entries);
}
if (ENABLE_FEATURE_CLEAN_UP) {
free((char*)host);
int arp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int arp_main(int argc UNUSED_PARAM, char **argv)
{
- char *hw_type;
- char *protocol;
+ const char *hw_type;
+ const char *protocol;
+ unsigned opts;
- /* Initialize variables... */
- ap = get_aftype(DFLT_AF);
- if (!ap)
- bb_error_msg_and_die("%s: %s not supported", DFLT_AF, "address family");
+ INIT_G();
+
+ xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), sockfd);
- getopt32(argv, "A:p:H:t:i:adnDsv", &protocol, &protocol,
+ ap = get_aftype(DFLT_AF);
+ /* Defaults are always supported */
+ //if (!ap)
+ // bb_error_msg_and_die("%s: %s not supported", DFLT_AF, "address family");
+ hw = get_hwtype(DFLT_HW);
+ //if (!hw)
+ // bb_error_msg_and_die("%s: %s not supported", DFLT_HW, "hardware type");
+
+ opts = getopt32(argv, "A:p:H:t:i:adnDsv", &protocol, &protocol,
&hw_type, &hw_type, &device);
argv += optind;
- if (option_mask32 & ARP_OPT_A || option_mask32 & ARP_OPT_p) {
+ if (opts & (ARP_OPT_A | ARP_OPT_p)) {
ap = get_aftype(protocol);
- if (ap == NULL)
+ if (!ap)
bb_error_msg_and_die("%s: unknown %s", protocol, "address family");
}
- if (option_mask32 & ARP_OPT_A || option_mask32 & ARP_OPT_p) {
+ if (opts & (ARP_OPT_H | ARP_OPT_t)) {
hw = get_hwtype(hw_type);
- if (hw == NULL)
+ if (!hw)
bb_error_msg_and_die("%s: unknown %s", hw_type, "hardware type");
hw_set = 1;
}
- //if (option_mask32 & ARP_OPT_i)... -i
+ //if (opts & ARP_OPT_i)... -i
if (ap->af != AF_INET) {
bb_error_msg_and_die("%s: kernel only supports 'inet'", ap->name);
}
-
- /* If no hw type specified get default */
- if (!hw) {
- hw = get_hwtype(DFLT_HW);
- if (!hw)
- bb_error_msg_and_die("%s: %s not supported", DFLT_HW, "hardware type");
- }
-
if (hw->alen <= 0) {
bb_error_msg_and_die("%s: %s without ARP support",
- hw->name, "hardware type");
+ hw->name, "hardware type");
}
- sockfd = xsocket(AF_INET, SOCK_DGRAM, 0);
/* Now see what we have to do here... */
- if (option_mask32 & (ARP_OPT_d|ARP_OPT_s)) {
+ if (opts & (ARP_OPT_d | ARP_OPT_s)) {
if (argv[0] == NULL)
bb_error_msg_and_die("need host name");
- if (option_mask32 & ARP_OPT_s)
+ if (opts & ARP_OPT_s)
return arp_set(argv);
return arp_del(argv);
}
- //if (option_mask32 & ARP_OPT_a) - default
+
+ //if (opts & ARP_OPT_a) - default
return arp_show(argv[0]);
}
projects / oweals / busybox.git / blobdiff