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-rw-r--r--lib/prefix.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/lib/prefix.h b/lib/prefix.h
index e338140f1a..7a7e13518a 100644
--- a/lib/prefix.h
+++ b/lib/prefix.h
@@ -451,8 +451,7 @@ extern void masklen2ip(const int, struct in_addr *);
extern in_addr_t ipv4_network_addr(in_addr_t hostaddr, int masklen);
/* given the address of a host on a network and the network mask length,
* calculate the broadcast address for that network;
- * special treatment for /31: returns the address of the other host
- * on the network by flipping the host bit */
+ * special treatment for /31 according to RFC3021 section 3.3 */
extern in_addr_t ipv4_broadcast_addr(in_addr_t hostaddr, int masklen);
extern int netmask_str2prefix_str(const char *, const char *, char *);