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42 lines
1.4 KiB
Groff
42 lines
1.4 KiB
Groff
.TH scan_ip6if 3
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.SH NAME
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scan_ip6 \- parse an IPv6 number and interface in ASCII representation
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.SH SYNTAX
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.B #include <libowfat/ip6.h>
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int \fBscan_ip6if\fP(const char *\fIsrc\fR,char \fIip\fR[16],uint32* scope_id);
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.SH DESCRIPTION
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scan_ip6if parses an IPv6 number in RFC1884 ASCII representation
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from \fIsrc\fR and writes the result into \fIip\fR. If the IPv6 number
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is followed by the percent sign, scan_ip6if takes the word following
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that, tries to parse it as network interface and writes the result to
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\fIscope_id\fR.
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It returns the number of bytes read from \fIsrc\fR or 0 if the parsing
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failed.
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scan_ip6if 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_ip6if 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_ip6if 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 <libowfat/str.h>
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.br
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#include <libowfat/ip6.h>
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char buf[]="::1%lo";
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char ip[16];
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uint32 scope_id;
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if (scan_ip6if(buf,ip,&scope_id) != 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), fmt_ip6if(3)
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