db, IP2BIN: correct `format_ipv6()` output buffer sizes

`format_ipv6()` formats IPv6 addresses as hex-strings.  However, sizing for the
output buffer is not done quite right.

The elements of the `ipbin_array` array in ulogd_filter_IP2BIN.c are sized using
a local macro, `IPADDR_LENGTH`, which is defined as 128, the number of bits in
an IPv6 address; this is much larger than necessary.

Define an appropriate macro and use that instead.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/util/db.c b/util/db.c
index 11c3e6a..69f4290 100644
--- a/util/db.c
+++ b/util/db.c
@@ -370,7 +370,7 @@ static void __format_query_db(struct ulogd_pluginstance *upi, char *start)
 				sprintf(stmt_ins, "%u,", res->u.value.ui32);
 			else {
 				struct in6_addr ipv6;
-				char addrbuf[2 + sizeof(ipv6) * 2  + 1];
+				char addrbuf[FORMAT_IPV6_BUFSZ];
 
 				memcpy(ipv6.s6_addr, res->u.value.ui128,
 				       sizeof(ipv6.s6_addr));