Code Sample:Routines for converting data between a host's internal representation and Network Byte Order

Beginners Guide to Sockets

(Continued from previous question...)

Code Sample:Routines for converting data between a host's internal representation and Network Byte Order

Routines for converting data between a host's internal representation and Network Byte Order are:

#include &ltsys/types.h>
#include &ltnetinet/in.h>

u_long htonl(u_long hostlong);

u_short htons(u_short hostshort);

u_long ntohl(u_long netlong);

u_short ntohs(u_short netshort);

These functions are macros and result in the insertion of conversion source code into the calling program. On little-endian machines the code will change the values around to network byte order. On big-endian machines no code is inserted since none is needed; the functions are defined as null.

(Continued on next question...)

Other Interview Questions

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• What this function socketpair() does?
• What this function socket() does?
• What this function bind() does?
• What this function connect() does?
• What this function sendto() does?
• What this function recvfrom() does?
• Code Sample: How to disposing of a Socket ?
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• Code Sample: How to make a Socket a Listen-only Connection Endpoint - listen()
• Code Sample: Connection Establishment by Server - accept()
• Code Sample:Data Transfer over Connected Sockets - send() and recv()
• Code Sample:A Connection-Oriented Example - listen(), accept()
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• What is the /etc/hosts File?
• How to Selecte a Service Port?
• How to Put a Host Program Address Together?
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• Code Sample:Routines for converting data between a host's internal representation and Network Byte Order
• Code Sample:Network Address Conversion Routines
• Code Sample:Server Source Listing
• Code Sample: Client Source Listing