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.TH scan_ip6 3
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.SH NAME
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scan_ip6 \- parse an IPv6 number in ASCII representation
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.SH SYNTAX
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.B #include <ip6.h>
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int \fBscan_ip6\fP(const char *\fIsrc\fR,char \fIip\fR[16]);
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.SH DESCRIPTION
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scan_ip6 parses an IPv6 number in RFC1884 ASCII representation
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from \fIsrc\fR and writes the result into \fIip\fR. It returns the
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number of bytes read from \fIsrc\fR or 0 if the parsing failed.
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scan_ip6 accepts upper and lower case hex letters, it understands "::"
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compression and partial IPv4 addresses as in "::FFFF:129.144.52.38".
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To allow transparent usage of IPv4 in IPv6 applications, scan_ip6 also
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understands IPv4 addresses in dotted-decimal notation and will return
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an IPv4-mapped IPv6 address (i.e. "127.0.0.1" will be parsed as
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"::FFFF:127.0.0.1".
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Unlike many other IP parsing routines, scan_ip6 does not recognize octal
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(like \fB0177.0.0.1\fR) or hexadecimal numbers (like \fB0x7f000001\fR)
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in the IPv4 part.
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.SH EXAMPLE
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#include <str.h>
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.br
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#include <ip6.h>
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char buf[]="::1";
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char ip[16];
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if (scan_ip6(buf,ip) != str_len(buf))
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parse_error();
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.SH "SEE ALSO"
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fmt_ip6(3), scan_ip4(3), inet_pton(3)
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