Просмотр исходного кода

README-en.md edited online with Bitbucket

Jose R Ortiz Ubarri 8 лет назад
Родитель
Сommit
4c2518b1a1
1 измененных файлов: 22 добавлений и 22 удалений
  1. 22
    22
      README-en.md

+ 22
- 22
README-en.md Просмотреть файл

@@ -112,31 +112,31 @@ The task of the sniffer programmer to decode the raw stream into human readable
112 112
 
113 113
 1. Study the file `ethernet_hdr.h`. This file contains the definition of the data structure that represents an Ethernet header.:
114 114
 
115
-    ```
116
-    #define ETHER_ADDR_LEN 6
115
+     ```
116
+     #define ETHER_ADDR_LEN 6
117 117
 
118
-    struct sniff_ethernet {
118
+     struct sniff_ethernet {
119 119
         u_char  ether_dhost[ETHER_ADDR_LEN];    /* destination host address */
120 120
         u_char  ether_shost[ETHER_ADDR_LEN];    /* source host address */
121 121
         u_short ether_type;                     /* IP? ARP? RARP? etc */
122
-    };
123
-    ```
122
+     };
123
+     ```
124 124
 
125
-    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.
125
+     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.
126 126
 
127
-    As you know, it is not a good idea to show this information format to a regular user.  Your first task is to define the functions of the C++ class that defines the functions to translate the MAC address information into human readable strings.
127
+     As you know, it is not a good idea to show this information format to a regular user.  Your first task is to define the functions of the C++ class that defines the functions to translate the MAC address information into human readable strings.
128 128
 
129 129
 2. The following code is the definition of the class `ethernet_packet`, that can be found in file `ethernet_packet.h`:
130
-
131
-    ```
132
-    class ethernet_packet
133
-    {
130
+ 
131
+     ```
132
+     class ethernet_packet
133
+     {
134 134
 
135 135
         sniff_ethernet ethernet ;
136 136
         // Returns a 6 bytes MAC address in string representation.
137 137
         string mac2string(u_char []) ;
138 138
 
139
-    public:
139
+     public:
140 140
         ethernet_packet();  // Default constructor
141 141
 
142 142
         // Set the ethernet variable member ether_dhost to the values
@@ -156,10 +156,10 @@ The task of the sniffer programmer to decode the raw stream into human readable
156 156
         // Return the ethernet type
157 157
         u_short getEtherType() ;
158 158
 
159
-    };
160
-    ```
159
+     };
160
+     ```
161 161
 
162
-    Note that each object of the class `ethernet_packet` only has one attribute: a structure of type `sniff_ethernet` named `ethernet`
162
+     Note that each object of the class `ethernet_packet` only has one attribute: a structure of type `sniff_ethernet` named `ethernet`
163 163
 
164 164
 3. The rest are methods that act as interface to the attribute:
165 165
 
@@ -174,16 +174,16 @@ The task of the sniffer programmer to decode the raw stream into human readable
174 174
 
175 175
 ### Exercise 3 - Construct the header of class ip_packet  
176 176
 
177
-Study the definitions of the functions of the class `ip_packet` found in file `ip_packet.cpp`
177
+1. Study the definitions of the functions of the class `ip_packet` found in file `ip_packet.cpp`
178 178
 
179
-Your task is to create the *declaration* of the class `ip_packet` in the file `ip_packet.cpp`. The attributes of the class `ip_packet` must be:
179
+2. Your task is to create the *declaration* of the class `ip_packet` in the file `ip_packet.cpp`. The attributes of the class `ip_packet` must be:
180 180
 
181
-* two objects of the class `string`s to store the source and destination IP addresses
182
-* one variable of one byte (`char`) variable to store the IP protocol
183
-* two variables `unsigned short` to store the source and destination port
184
-* one object of the class `string` to store the packet payload.
181
+     * two objects of the class `string`s to store the source and destination IP addresses
182
+     * one variable of one byte (`char`) variable to store the IP protocol
183
+     * two variables `unsigned short` to store the source and destination port
184
+     * one object of the class `string` to store the packet payload.
185 185
 
186
-In the declaration of the class `ip_packet` you must especify that it is a **derived class** (inherits) of the class `ethernet_packet`.
186
+     In the declaration of the class `ip_packet` you must especify that it is a **derived class** (inherits) of the class `ethernet_packet`.
187 187
 
188 188
 ---
189 189