1 files changed, 9 insertions, 0 deletions
diff --git a/icmp.h b/icmp.h
index 4cccb95..eed1714 100644
--- a/icmp.h
+++ b/icmp.h
@@ -22,3 +22,12 @@ struct __attribute__((packed)) icmp_echo {
 
 #define ICMP_MAX_PAYLOAD_LENGTH (MAX_DATAGRAM_SIZE - ICMP_PAYLOAD_OFFSET)
 #define ICMP_SAFE_PAYLOAD_LENGTH (MIN_MTU - IP_HEADER_SIZE - ICMP_PAYLOAD_OFFSET)
+
+
+struct icmp_incoming {
+	const uint8_t *data;  // points to internal buffer
+	size_t length;  // length of 'data'
+
+	int id, seqnum;
+	uint32_t source_addr;
+};