Man page - scan_ip6if(3)

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Manual

scan_ip6if

NAME
SYNTAX
DESCRIPTION
EXAMPLE
SEE ALSO

NAME

scan_ip6 - parse an IPv6 number and interface in ASCII representation

SYNTAX

#include <libowfat/ip6.h>

int scan_ip6if (const char * src ,char ip [16],uint32* scope_id);

DESCRIPTION

scan_ip6if parses an IPv6 number in RFC1884 ASCII representation from src and writes the result into ip . If the IPv6 number is followed by the percent sign, scan_ip6if takes the word following that, tries to parse it as network interface and writes the result to scope_id .

It returns the number of bytes read from src or 0 if the parsing failed.

scan_ip6if 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, scan_ip6if 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, scan_ip6if does not recognize octal (like 0177.0.0.1 ) or hexadecimal numbers (like 0x7f000001 ) in the IPv4 part.

EXAMPLE

#include <libowfat/str.h>
#include <libowfat/ip6.h>

char buf[]="::1%lo";
char ip[16];
uint32 scope_id;
if (scan_ip6if(buf,ip,&scope_id) != str_len(buf))
parse_error();