scan_ip6if(3)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);
DESCRIPTIONscan_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 ALSOfmt_ip6(3), scan_ip4(3), fmt_ip6if(3)scan_ip6if(3)
