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();

SEE ALSO

       fmt_ip6(3), scan_ip4(3), fmt_ip6if(3)

                                                                                    scan_ip6if(3)