diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/arp.c | 72 |
1 files changed, 45 insertions, 27 deletions
diff --git a/networking/arp.c b/networking/arp.c index e2c5bbb..278f2dc 100644 --- a/networking/arp.c +++ b/networking/arp.c @@ -27,24 +27,40 @@ #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) */ + +}; +#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 { \ + device = ""; \ +} while (0) + static const char options[] ALIGN1 = "pub\0" @@ -445,27 +461,30 @@ int arp_main(int argc UNUSED_PARAM, char **argv) { const char *hw_type = "ether"; const char *protocol; + unsigned opts; + + INIT_G(); - /* Initialize variables... */ + xmove_fd(xsocket(AF_INET, SOCK_DGRAM, 0), sockfd); ap = get_aftype(DFLT_AF); if (!ap) bb_error_msg_and_die("%s: %s not supported", DFLT_AF, "address family"); - getopt32(argv, "A:p:H:t:i:adnDsv", &protocol, &protocol, + 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) 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_A | ARP_OPT_p)) { hw = get_hwtype(hw_type); if (hw == NULL) 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); @@ -482,16 +501,15 @@ int arp_main(int argc UNUSED_PARAM, char **argv) bb_error_msg_and_die("%s: %s without ARP support", 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]); } |