2 files changed, 53 insertions, 1 deletions
diff --git a/src/net/ipv4.c b/src/net/ipv4.c
index 38ae7da..b30fe15 100644
--- a/src/net/ipv4.c
+++ b/src/net/ipv4.c
@@ -1,6 +1,7 @@
 #include "ipv4.h"
 
 #include "stdio.h"
+#include "string.h"
 
 char *network_ipv4_address_to_string( network_ipv4_address_t addr, char *buf, size_t buflen )
 {
@@ -11,3 +12,20 @@ char *network_ipv4_address_to_string( network_ipv4_address_t addr, char *buf, si
 	return buf;
 }
 
+char *network_ipv4_protocol_to_string( network_ipv4_protocol_t protocol, char *buf, size_t buflen )
+{
+	switch( protocol ) {
+		case NETWORK_IPV4_PROTOCOL_ICMP:
+			strlcpy( buf, "ICMP", NETWORK_PROTOCOL_IPV4_PROTOCOL_STRING );
+			break;
+		
+		case NETWORK_IPV4_PROTOCOL_UDP:
+			strlcpy( buf, "UDP", NETWORK_PROTOCOL_IPV4_PROTOCOL_STRING );
+			break;
+
+		default:
+			strlcpy( buf, "?", NETWORK_PROTOCOL_IPV4_PROTOCOL_STRING );
+			break;
+	}
+	return buf;
+}
diff --git a/src/net/ipv4.h b/src/net/ipv4.h
index acf7f7f..95dec18 100644
--- a/src/net/ipv4.h
+++ b/src/net/ipv4.h
@@ -9,10 +9,44 @@
 // protocol_address_len
 #define NETWORK_PROTOCOL_IPV4_ADDRESS_LENGTH 4
 
+// protocol string len
+#define NETWORK_PROTOCOL_IPV4_PROTOCOL_STRING 5
+
+#if defined( __TINYC__ )
+#pragma pack(1)
+#endif
+
 typedef struct {
 	uint8_t byte[NETWORK_PROTOCOL_IPV4_ADDRESS_LENGTH];
-} network_ipv4_address_t;
+} __attribute__( ( packed ) ) network_ipv4_address_t;
+
+typedef uint8_t network_ipv4_protocol_t;
+
+// TODO: network order not host oder, so for now swap it
+#define NETWORK_IPV4_PROTOCOL_ICMP (network_ipv4_protocol_t)0x01
+#define NETWORK_IPV4_PROTOCOL_UDP (network_ipv4_protocol_t)0x11
+
+typedef struct {
+	uint8_t internet_header_length : 4;
+	uint8_t version : 4;
+	uint8_t explicit_congestion_notification : 2;
+	uint8_t differentiated_services_code_point : 6;
+	uint16_t total_length;
+	uint16_t identification;
+	uint16_t fragment_offset : 13;
+	uint16_t flags : 3;
+	uint8_t time_to_live;
+	network_ipv4_protocol_t protocol;
+	uint16_t checksum;
+	network_ipv4_address_t source_address;
+	network_ipv4_address_t destination_address;
+} __attribute__( ( packed ) ) network_ipv4_packet_t;
+
+#if defined( __TINYC__ )
+#pragma pack()
+#endif
 
 char *network_ipv4_address_to_string( network_ipv4_address_t addr, char *buf, size_t buflen );
+char *network_ipv4_protocol_to_string( network_ipv4_protocol_t protocol, char *buf, size_t buflen );
 
 #endif // IPV4_H