1 files changed, 7 insertions, 1 deletions
diff --git a/icmpd.h b/icmpd.h
index 7a87ec6..cb574ee 100644
--- a/icmpd.h
+++ b/icmpd.h
@@ -16,7 +16,8 @@ struct icmpd_received {
 
 struct icmpd;
 
-// Pass 0 as client_addr to listen for messages from any IP (this channel will then only receive unassigned messages)
+// Pass 0 as client_addr to listen for messages from any IP (this channel
+//   will then only receive unassigned messages)
 // Pass -1 as id to listen for messages with any id
 struct icmpd* icmpd_create_server(int id, uint32_t client_addr);
 
@@ -28,4 +29,9 @@ bool icmpd_peek(struct icmpd *d);
 struct icmpd_received icmpd_recv(struct icmpd *d);
 void icmpd_send(struct icmpd *d, const void *data, size_t length);
 
+// File descriptor that select(2) reports readable when a message might be ready.
+// Do not read from this file descriptor.
+// Use icmpd_peek() to verify that a message is actually ready.
+int icmpd_get_select_fd(struct icmpd *d);
+
 void icmpd_destroy(struct icmpd *d);