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@@ -112,13 +112,13 @@ The task of the sniffer programmer to decode the raw stream into human readable
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 1. Study the file `ethernet_hdr.h`. This file contains the definition of the data structure that represents an Ethernet header.:
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-     #define ETHER_ADDR_LEN 6
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+         #define ETHER_ADDR_LEN 6
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-     struct sniff_ethernet {
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-        u_char  ether_dhost[ETHER_ADDR_LEN];    /* destination host address */
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-        u_char  ether_shost[ETHER_ADDR_LEN];    /* source host address */
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-        u_short ether_type;                     /* IP? ARP? RARP? etc */
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-     };
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+         struct sniff_ethernet {
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+            u_char  ether_dhost[ETHER_ADDR_LEN];    /* destination host address */
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+            u_char  ether_shost[ETHER_ADDR_LEN];    /* source host address */
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+            u_short ether_type;                     /* IP? ARP? RARP? etc */
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+         };
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      The Ethernet header above is used to decode the ethernet part of the raw data in each packet.  It is composed of the source MAC address (ether_shost, 6 bytes), the destiantion MAC address (ether_dhost, 6 bytes), and the type of Ethernet packet (ether_type, 2 bytes) which is used to determine if the packet is an IP packet.
@@ -127,34 +127,33 @@ The task of the sniffer programmer to decode the raw stream into human readable
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 2. The following code is the definition of the class `ethernet_packet`, that can be found in file `ethernet_packet.h`:
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-     class ethernet_packet
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-     {
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-
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-        sniff_ethernet ethernet ;
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-        // Returns a 6 bytes MAC address in string representation.
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-        string mac2string(u_char []) ;
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-
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-     public:
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-        ethernet_packet();  // Default constructor
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-
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-        // Set the ethernet variable member ether_dhost to the values
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-        // received in the array
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-        void setEtherDHost(u_char []) ;
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+         class ethernet_packet
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+         {
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+            sniff_ethernet ethernet ;
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+            
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+            // Returns a 6 bytes MAC address in string representation.
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+            string mac2string(u_char []) ;
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+
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+         public:
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+            ethernet_packet();  // Default constructor
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+
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+            // Set the ethernet variable member ether_dhost to the values
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+            // received in the array
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+            void setEtherDHost(u_char []) ;
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-        // Same as above but to the ether_shost
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-        void setEtherSHost(u_char []) ;
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-
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-        // Set the ethernet type to the value received.
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-        void setEtherType(u_short) ;
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+            // Same as above but to the ether_shost
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+            void setEtherSHost(u_char []) ;
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-        // returns the string representation of the ethernet addresses
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-        string getEtherDHost() ;
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-        string getEtherSHost() ;
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+            // Set the ethernet type to the value received.
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+            void setEtherType(u_short) ;
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-        // Return the ethernet type
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-        u_short getEtherType() ;
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+            // returns the string representation of the ethernet addresses
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+            string getEtherDHost() ;
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+            string getEtherSHost() ;
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-     };
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+            // Return the ethernet type
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+            u_short getEtherType() ;
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+         };
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      Note that each object of the class `ethernet_packet` only has one attribute: a structure of type `sniff_ethernet` named `ethernet`
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