{Ethernet, IP, ICMP, UDP, TCP} headers

header.h

@@ -1,55 +1,55 @@
 // Ethernet header 
 struct ethheader
 {
-	u_char ether_dhost[6]; // destination host address 
-	u_char ether_shost[6]; // source host address 
-	u_short ether_type;	   // IP? ARP? RARP? etc 
+	u_char ether_dhost[6];	// destination host address 
+	u_char ether_shost[6];	// source host address 
+	u_short ether_type;		// IP? ARP? RARP? etc 
 };
 
 // IP Header 
 struct ipheader
 {
-	unsigned char iph_ihl : 4,		 // IP header length
-		iph_ver : 4;				 // IP version
-	unsigned char iph_tos;			 // Type of service
-	unsigned short int iph_len;		 // IP Packet length (data + header)
-	unsigned short int iph_ident;	 // Identification
-	unsigned short int iph_flag : 3, // Fragmentation flags
-		iph_offset : 13;			 // Flags offset
-	unsigned char iph_ttl;			 // Time to Live
-	unsigned char iph_protocol;		 // Protocol type
-	unsigned short int iph_chksum;	 // IP datagram checksum
-	struct in_addr iph_sourceip;	 // Source IP address
-	struct in_addr iph_destip;		 // Destination IP address
+	unsigned char iph_ihl : 4,			// IP header length
+		iph_ver : 4;					// IP version
+	unsigned char iph_tos;				// Type of service
+	unsigned short int iph_len;			// IP Packet length (data + header)
+	unsigned short int iph_ident;		// Identification
+	unsigned short int iph_flag : 3,	// Fragmentation flags
+		iph_offset : 13;				// Flags offset
+	unsigned char iph_ttl;				// Time to Live
+	unsigned char iph_protocol;			// Protocol type
+	unsigned short int iph_chksum;		// IP datagram checksum
+	struct in_addr iph_sourceip;		// Source IP address
+	struct in_addr iph_destip;			// Destination IP address
 };
 
 // ICMP Header  
 struct icmpheader
 {
 	unsigned char icmp_type;		// ICMP message type
 	unsigned char icmp_code;		// Error code
-	unsigned short int icmp_chksum; // Checksum for ICMP Header and data
+	unsigned short int icmp_chksum;	// Checksum for ICMP Header and data
 	unsigned short int icmp_id;		// Used for identifying request
 	unsigned short int icmp_seq;	// Sequence number
 };
 
 // UDP Header
 struct udpheader
 {
-	u_int16_t udp_sport; // source port 
-	u_int16_t udp_dport; // destination port 
-	u_int16_t udp_ulen;	 // udp length 
-	u_int16_t udp_sum;	 // udp checksum 
+	u_int16_t udp_sport;	// source port 
+	u_int16_t udp_dport;	// destination port 
+	u_int16_t udp_ulen;		// udp length 
+	u_int16_t udp_sum;		// udp checksum 
 };
 
 // TCP Header 
 struct tcpheader
 {
-	u_short tcp_sport; // source port 
-	u_short tcp_dport; // destination port 
-	u_int tcp_seq;	   // sequence number 
-	u_int tcp_ack;	   // acknowledgement number 
-	u_char tcp_offx2;  // data offset, rsvd 
+	u_short tcp_sport;	// source port 
+	u_short tcp_dport;	// destination port 
+	u_int tcp_seq;		// sequence number 
+	u_int tcp_ack;		// acknowledgement number 
+	u_char tcp_offx2;	// data offset, rsvd 
 	#define TH_OFF(th) (((th)->tcp_offx2 & 0xf0) >> 4)
 	u_char tcp_flags;
 	#define TH_FIN 0x01
@@ -61,9 +61,9 @@ struct tcpheader
 	#define TH_ECE 0x40
 	#define TH_CWR 0x80
 	#define TH_FLAGS (TH_FIN | TH_SYN | TH_RST | TH_ACK | TH_URG | TH_ECE | TH_CWR)
-	u_short tcp_win; // window 
-	u_short tcp_sum; // checksum 
-	u_short tcp_urp; // urgent pointer 
+	u_short tcp_win;	// window 
+	u_short tcp_sum;	// checksum 
+	u_short tcp_urp;	// urgent pointer 
 };
 
 // Psuedo TCP header