1 files changed, 4 insertions, 0 deletions
diff --git a/icmp.h b/icmp.h
index 9d26050..1941028 100644
--- a/icmp.h
+++ b/icmp.h
@@ -12,10 +12,14 @@ int icmp_sock_init(struct ctx *c);
  * struct icmp_ctx - Execution context for ICMP routines
  * @s4:		ICMP socket number
  * @s6:		ICMPv6 socket number
+ * @fd_min:	Lowest file descriptor number for ICMP/ICMPv6 ever used
+ * @fd_max:	Highest file descriptor number for ICMP/ICMPv6 ever used
  */
 struct icmp_ctx {
 	int s4;
 	int s6;
+	int fd_min;
+	int fd_max;
 };
 
 #endif /* ICMP_H */