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-rw-r--r--conf/confbase.Y17
1 files changed, 12 insertions, 5 deletions
diff --git a/conf/confbase.Y b/conf/confbase.Y
index 47ee07ce..e7fd1677 100644
--- a/conf/confbase.Y
+++ b/conf/confbase.Y
@@ -187,17 +187,24 @@ pxlen4:
net_ip4_: IP4 pxlen4
{
net_fill_ip4(&($$), $1, $2);
- if (!net_validate_ip4((net_addr_ip4 *) &($$)))
- cf_error("Invalid IPv4 prefix");
+
+ net_addr_ip4 *n = (void *) &($$);
+ if (!net_validate_ip4(n))
+ cf_error("Invalid IPv4 prefix %I4/%d, maybe you wanted %I4/%d",
+ n->prefix, n->pxlen, ip4_and(n->prefix, ip4_mkmask(n->pxlen)), n->pxlen);
};
net_ip6_: IP6 '/' NUM
{
- net_fill_ip6(&($$), $1, $3);
if ($3 < 0 || $3 > IP6_MAX_PREFIX_LENGTH)
cf_error("Invalid prefix length %d", $3);
- if (!net_validate_ip6((net_addr_ip6 *) &($$)))
- cf_error("Invalid IPv6 prefix");
+
+ net_fill_ip6(&($$), $1, $3);
+
+ net_addr_ip6 *n = (void *) &($$);
+ if (!net_validate_ip6(n))
+ cf_error("Invalid IPv6 prefix %I6/%d, maybe you wanted %I6/%d",
+ n->prefix, n->pxlen, ip6_and(n->prefix, ip6_mkmask(n->pxlen)), n->pxlen);
};
net_vpn4_: VPN_RD net_ip4_