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[ipv6] Add inet6_aton()

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2013-09-11 04:26:39 +01:00
parent 8dd180f165
commit a9fa0d5f2b
3 changed files with 141 additions and 5 deletions
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77
src/net/ipv6.c
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@@ -622,11 +622,80 @@ static int ipv6_rx ( struct io_buffer *iobuf, struct net_device *netdev,
return rc;
}
/**
* Parse IPv6 address
*
* @v string IPv6 address string
* @ret in IPv6 address to fill in
* @ret rc Return status code
*/
int inet6_aton ( const char *string, struct in6_addr *in ) {
uint16_t *word = in->s6_addr16;
uint16_t *end = ( word + ( sizeof ( in->s6_addr16 ) /
sizeof ( in->s6_addr16[0] ) ) );
uint16_t *pad = NULL;
const char *nptr = string;
char *endptr;
unsigned long value;
size_t pad_len;
size_t move_len;
/* Parse string */
while ( 1 ) {
/* Parse current word */
value = strtoul ( nptr, &endptr, 16 );
if ( value > 0xffff ) {
DBG ( "IPv6 invalid word value %#lx in \"%s\"\n",
value, string );
return -EINVAL;
}
*(word++) = htons ( value );
/* Parse separator */
if ( ! *endptr )
break;
if ( *endptr != ':' ) {
DBG ( "IPv6 invalid separator '%c' in \"%s\"\n",
*endptr, string );
return -EINVAL;
}
if ( ( endptr == nptr ) && ( nptr != string ) ) {
if ( pad ) {
DBG ( "IPv6 invalid multiple \"::\" in "
"\"%s\"\n", string );
return -EINVAL;
}
pad = word;
}
nptr = ( endptr + 1 );
/* Check for overrun */
if ( word == end ) {
DBG ( "IPv6 too many words in \"%s\"\n", string );
return -EINVAL;
}
}
/* Insert padding if specified */
if ( pad ) {
move_len = ( ( ( void * ) word ) - ( ( void * ) pad ) );
pad_len = ( ( ( void * ) end ) - ( ( void * ) word ) );
memmove ( ( ( ( void * ) pad ) + pad_len ), pad, move_len );
memset ( pad, 0, pad_len );
} else if ( word != end ) {
DBG ( "IPv6 underlength address \"%s\"\n", string );
return -EINVAL;
}
return 0;
}
/**
* Convert IPv6 address to standard notation
*
* @v in IPv6 address
* @ret string IPv6 address in standard notation
* @v in IPv6 address
* @ret string IPv6 address string in canonical format
*
* RFC5952 defines the canonical format for IPv6 textual representation.
*/
@@ -672,8 +741,8 @@ char * inet6_ntoa ( const struct in6_addr *in ) {
/**
* Transcribe IPv6 address
*
* @v net_addr IPv6 address
* @ret string IPv6 address in standard notation
* @v net_addr IPv6 address
* @ret string IPv6 address in standard notation
*
*/
static const char * ipv6_ntoa ( const void *net_addr ) {