cellular-infrastructure
/
openggsn
Archived
9
0
Fork 0
Code Releases Activity

in46_addr: Add new function in46a_prefix_equal() 

This function is used to compare an IPv6 address against another,
using the smaller of the two prefix lengths.

Change-Id: Ic993d8abdc90897cb55276f01ae3b8a5eadf5a0d
This commit is contained in:
Harald Welte 2017-08-08 18:09:36 +02:00
parent d1bf1e11ba
commit 365f8fa462
2 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
lib/in46_addr.c
View File

@ -74,6 +74,23 @@ int in46a_equal(const struct in46_addr *a, const struct in46_addr *b)
return 0;
}
/*! Determine if two in46_addr prefix are equal or not
* The prefix length is determined by the shortest of the prefixes of a and b
* \returns 1 in case the common prefix are equal; 0 otherwise */
int in46a_prefix_equal(const struct in46_addr *a, const struct in46_addr *b)
{
unsigned int len;
if (a->len > b->len)
len = b->len;
else
len = a->len;
if (!memcmp(&a->v6, &b->v6, len))
return 1;
else
return 0;
}
/*! Match if IPv6 addr1 + addr2 are within same \a mask */
static int ipv6_within_mask(const struct in6_addr *addr1, const struct in6_addr *addr2,
const struct in6_addr *mask)

1
lib/in46_addr.h
View File

@ -18,6 +18,7 @@ extern int in46a_to_af(const struct in46_addr *in);
extern int in46a_to_sas(struct sockaddr_storage *out, const struct in46_addr *in);
extern const char *in46a_ntop(const struct in46_addr *in, char *dst, socklen_t dst_size);
extern int in46a_equal(const struct in46_addr *a, const struct in46_addr *b);
extern int in46a_prefix_equal(const struct in46_addr *a, const struct in46_addr *b);
extern int in46a_within_mask(const struct in46_addr *addr, const struct in46_addr *net, size_t prefixlen);
int in46a_to_eua(const struct in46_addr *src, struct ul66_t *eua);