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)