Technical Reference: Kernel and Subsystems, Volume 1

find_input_type Kernel Service

Purpose

Finds the given packet type in the Network Input Interface switch table and distributes the input packet according to the table entry for that type.

Syntax

#include <sys/types.h>
#include <sys/errno.h>
#include <net/if.h>
int find_input_type (type, m, ac, header_pointer)
ushort type;
struct mbuf * m;
struct arpcom * ac;
caddr_t header_pointer;

Parameters

type	Specifies the protocol type.
m	Points to the mbuf buffer containing the packet to distribute.
ac	Points to the network common portion (arpcom) of the network interface on which the packet was received. This common portion is defined as follows: in net/if_arp.h
header_pointer	Points to the buffer containing the input packet header.

Description

The find_input_type kernel service finds the given packet type in the Network Input table and distributes the input packet contained in the mbuf buffer pointed to by the m value. The ac parameter is passed to services that do not have a queued interface.

Execution Environment

The find_input_type kernel service can be called from either the process or interrupt environment.

Return Values

0	Indicates that the protocol type was successfully found.
ENOENT	Indicates that the service could not find the type in the Network Input table.

Related Information

The add_input_type kernel service, del_input_type kernel service.

Network Kernel Services in AIX 5L Version 5.2 Kernel Extensions and Device Support Programming Concepts.