netdb.h

Overview

Related Modules:

NET

Description:

Provides functions and data structures related to network operations. For example, you can use the functions to send and receive network data, manage network addresses, and convert bytes.

Since:

1.0

Version:

1.0

Summary

Data Structures

Data Structure Name

Description

hostent

Describes the host name and address information.

Macros

Macro Name and Value

Description

h_addr   h_addr_list[0]

Defines the first address in h_addr_list for backward compatibility.

Functions

Function Name

Description

setprotoent (int stayopen)

void 

Opens a connection to the database and sets the next entry to the first entry.

getprotoent (void)

struct protoent  

Retrieves the current protocol information.

getprotobyname (const char name)

struct protoent  

Retrieves the information about a specified protocol.

getprotobynumber (int num)

struct protoent  

Retrieves the information about a protocol with the specified number.

herror (const char msg)

void 

Prints error information.

hstrerror (int ecode)

const char  

Retrieves error information associated with the specified error number.