netlink — Netlink macros
#include <asm/types.h> #include <linux/netlink.h>
int
NLMSG_ALIGN( |
size_t | len); |
int
NLMSG_LENGTH( |
size_t | len); |
int
NLMSG_SPACE( |
size_t | len); |
void
*NLMSG_DATA( |
struct nlmsghdr * | nlh); |
struct nlmsghdr *NLMSG_NEXT( |
struct nlmsghdr * | nlh, |
| int | len); |
int
NLMSG_OK( |
struct nlmsghdr * | nlh, |
| int | len); |
int
NLMSG_PAYLOAD( |
struct nlmsghdr * | nlh, |
| int | len); |
<linux/netlink.h> defines several standard macros to
access or create a netlink datagram. They are similar in
spirit to the macros defined in cmsg(3) for auxiliary data.
The buffer passed to and from a netlink socket should only be
accessed using these macros.
NLMSG_ALIGN()Round the length of a netlink message up to align it properly.
NLMSG_LENGTH()Given the payload length, len, this macro returns
the aligned length to store in the nlmsg_len field of the nlmsghdr.
NLMSG_SPACE()Return the number of bytes that a netlink message
with payload of len would occupy.
NLMSG_DATA()Return a pointer to the payload associated with the passed nlmsghdr.
NLMSG_NEXT()Get the next nlmsghdr in a multipart message.
The caller must check if the current nlmsghdr didn't have the
NLMSG_DONE set —
this function doesn't return NULL on end. The length
parameter is an lvalue containing the remaining length
of the message buffer. This macro decrements it by the
length of the message header.
NLMSG_OK()Return true if the netlink message is not truncated and ok to parse.
NLMSG_PAYLOAD()Return the length of the payload associated with the nlmsghdr.
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
|
This manpage copyright 1998 by Andi Kleen. Subject to the GPL. Based on the original comments from Alexey Kuznetsov $Id: netlink.3,v 1.1 1999/05/14 17:17:24 freitag Exp $ |