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58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*/
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//kbuild:lib-$(CONFIG_ARP) += in_ether.o
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//kbuild:lib-$(CONFIG_IFCONFIG) += in_ether.o
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//kbuild:lib-$(CONFIG_IFENSLAVE) += in_ether.o
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#include "libbb.h"
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#include <net/if_arp.h>
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#include <net/ethernet.h>
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/* Convert Ethernet address from "XX[:]XX[:]XX[:]XX[:]XX[:]XX" to sockaddr.
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* Return nonzero on error.
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*/
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int FAST_FUNC in_ether(const char *bufp, struct sockaddr *sap)
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{
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char *ptr;
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int i, j;
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unsigned char val;
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unsigned char c;
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sap->sa_family = ARPHRD_ETHER;
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ptr = (char *) sap->sa_data;
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i = ETH_ALEN;
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goto first;
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do {
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/* We might get a semicolon here */
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if (*bufp == ':')
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bufp++;
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first:
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j = val = 0;
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do {
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c = *bufp;
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if (((unsigned char)(c - '0')) <= 9) {
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c -= '0';
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} else if ((unsigned char)((c|0x20) - 'a') <= 5) {
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c = (unsigned char)((c|0x20) - 'a') + 10;
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} else {
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if (j && (c == ':' || c == '\0'))
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/* One-digit byte: __:X:__ */
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break;
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return -1;
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}
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++bufp;
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val <<= 4;
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val += c;
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j ^= 1;
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} while (j);
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*ptr++ = val;
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} while (--i);
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/* Error if we aren't at end of string */
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return *bufp;
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}
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