Differential D4828 Diff 12050 head/contrib/ntp/lib/isc/inet_aton.c

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head/contrib/ntp/lib/isc/inet_aton.c

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* of an Internet address and convert to a binary address.		* of an Internet address and convert to a binary address.
* Returns 1 if the address is valid, 0 if not.		* Returns 1 if the address is valid, 0 if not.
* This replaces inet_addr, the return value from which		* This replaces inet_addr, the return value from which
* cannot distinguish between failure and a local broadcast address.		* cannot distinguish between failure and a local broadcast address.
*/		*/
int		int
isc_net_aton(const char cp, struct in_addr addr) {		isc_net_aton(const char cp, struct in_addr addr) {
unsigned long val;		unsigned long val;
int base, n;		int base;
unsigned char c;		unsigned char c;
isc_uint8_t parts[4];		isc_uint8_t parts[4];
isc_uint8_t *pp = parts;		isc_uint8_t *pp = parts;
int digit;		int digit;

c = *cp;		c = *cp;
for (;;) {		for (;;) {
/*		/*
▲ Show 20 Lines • Show All 57 Lines • ▼ Show 20 Lines	isc_net_aton(const char cp, struct in_addr addr) {
* Did we get a valid digit?		* Did we get a valid digit?
*/		*/
if (!digit)		if (!digit)
return (0);		return (0);
/*		/*
* Concoct the address according to		* Concoct the address according to
* the number of parts specified.		* the number of parts specified.
*/		*/
n = pp - parts + 1;		switch (pp - parts + 1) {
switch (n) {
case 1: /* a -- 32 bits */		case 1: /* a -- 32 bits */
break;		break;

case 2: /* a.b -- 8.24 bits */		case 2: /* a.b -- 8.24 bits */
if (val > 0xffffffU)		if (val > 0xffffffU)
return (0);		return (0);
val \|= parts[0] << 24;		val \|= parts[0] << 24;
break;		break;
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