Gets network entry by address.
#include <netdb.h>
struct netent *getnetbyaddr ( Network, Type)
long Network;
int Type;
Attention: Do not use the getnetbyaddr subroutine in a multithreaded environment.
The getnetbyaddr subroutine retrieves information from the /etc/networks file using the network address as a search key. The getnetbyaddr subroutine searches the file sequentially from the start of the file until it encounters a matching net number and type or until it reaches the end of the file.
The getnetbyaddr subroutine returns a pointer to a netent structure, which contains the equivalent fields for a network description line in the /etc/networks file. The netent structure is defined in the netdb.h file.
Use the endnetent subroutine to close the /etc/networks file.
| Network | Specifies the number of the network to be located. |
| Type | Specifies the address family for the network. The only supported value is AF_INET. |
Upon successful completion, the getnetbyaddr subroutine returns a pointer to a netent structure.
Note: The return value points to static data that is overwritten by subsequent calls.
If an error occurs or the end of the file is reached, the getnetbyaddr subroutine returns a null pointer.
The getnetbyaddr subroutine is part of Base Operating System (BOS) Runtime.
All applications containing the getnetbyaddr subroutine must be compiled with _BSD set to a specific value. Acceptable values are 43 and 44. In addition, all socket applications must include the BSD libbsd.a library.
| /etc/networks | |
| Contains official network names. | |
The endnetent subroutine, getnetbyname subroutine, getnetent subroutine, setnetent subroutine.
Sockets Overview in AIX 5L Version 5.1 General Programming Concepts: Writing and Debugging Programs.