.TH ip6_scan 3
.SH NAME
ip6_scan \- parse an IPv6 number in ASCII representation
.SH SYNTAX
.B #include <ip6.h>

int \fBip6_scan\fP(const char *\fIsrc\fR,char \fIip\fR[16]);
.SH DESCRIPTION
ip6_scan parses an IPv6 number in RFC1884 ASCII representation
from \fIsrc\fR and writes the result into \fIip\fR. It returns the
number of bytes read from \fIsrc\fR or 0 if the parsing failed.

ip6_scan accepts upper and lower case hex letters, it understands "::"
compression and partial IPv4 addresses as in "::FFFF:129.144.52.38".

To allow transparent usage of IPv4 in IPv6 applications, ip6_scan also
understands IPv4 addresses in dotted-decimal notation and will return
an IPv4-mapped IPv6 address (i.e. "127.0.0.1" will be parsed as
"::FFFF:127.0.0.1".

Unlike many other IP parsing routines, ip6_scan does not recognize octal
(like \fB0177.0.0.1\fR) or hexadecimal numbers (like \fB0x7f000001\fR)
in the IPv4 part.
.SH EXAMPLE
#include <str.h>
.br
#include <ip6.h>

  char buf[]="::1";
  char ip[16];
  if (ip6_scan(buf,ip) != str_len(buf))
    parse_error();

.SH "SEE ALSO"
ip6_fmt(3), ip4_scan(3)