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implement mask boundary for IPv6

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@14703 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2005-03-31 00:11:14 +00:00
parent 6d7b7f51f7
commit 1fffb1a13a
1 changed files with 55 additions and 1 deletions
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56
lib/krb5/addr_families.c
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@@ -386,6 +386,55 @@ ipv6_parse_addr (krb5_context context, const char *address, krb5_address *addr)
return -1;
}
static int
ipv6_mask_boundary(krb5_context context, const krb5_address *inaddr,
unsigned long len, krb5_address *low, krb5_address *high)
{
struct in6_addr addr, laddr, haddr;
u_int32_t m;
int i, sub_len;
if (len > 128) {
krb5_set_error_string(context, "IPv6 prefix too large (%ld)", len);
return KRB5_PROG_ATYPE_NOSUPP;
}
if (inaddr->address.length != sizeof(addr)) {
krb5_set_error_string(context, "IPv6 addr bad length");
return KRB5_PROG_ATYPE_NOSUPP;
}
memcpy(&addr, inaddr->address.data, inaddr->address.length);
for (i = 0; i < 16; i++) {
sub_len = min(8, len);
m = 0xff << (8 - sub_len);
laddr.s6_addr[i] = addr.s6_addr[i] & m;
haddr.s6_addr[i] = (addr.s6_addr[i] & m) | ~m;
if (len > 8)
len -= 8;
else
len = 0;
}
low->addr_type = KRB5_ADDRESS_INET6;
if (krb5_data_alloc(&low->address, sizeof(laddr.s6_addr)) != 0)
return -1;
memcpy(low->address.data, laddr.s6_addr, sizeof(laddr.s6_addr));
high->addr_type = KRB5_ADDRESS_INET6;
if (krb5_data_alloc(&high->address, sizeof(haddr.s6_addr)) != 0) {
krb5_free_address(context, low);
return -1;
}
memcpy(high->address.data, haddr.s6_addr, sizeof(haddr.s6_addr));
return 0;
}
#endif /* IPv6 */
/*
@@ -654,7 +703,7 @@ static struct addr_operations at[] = {
ipv6_h_addr2sockaddr,
ipv6_h_addr2addr,
ipv6_uninteresting, ipv6_anyaddr, ipv6_print_addr, ipv6_parse_addr,
NULL, NULL, NULL } ,
NULL, NULL, NULL, ipv6_mask_boundary } ,
#endif
{KRB5_ADDRESS_ADDRPORT, KRB5_ADDRESS_ADDRPORT, 0,
NULL, NULL, NULL, NULL, NULL,
@@ -1086,6 +1135,11 @@ krb5_make_addrport (krb5_context context,
return 0;
}
/*
* Calculate the boundary addresses of `inaddr'/`prefixlen' and store
* them in `low' and `high'.
*/
krb5_error_code KRB5_LIB_FUNCTION
krb5_address_prefixlen_boundary(krb5_context context,
const krb5_address *inaddr,