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scan_ip6if(3)         DragonFly Library Functions Manual         scan_ip6if(3)

NAME
       scan_ip6 - parse an IPv6 number and interface in ASCII representation

SYNTAX
       #include <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 <str.h>
       #include <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)