mirror of
https://git.proxmox.com/git/mirror_iproute2
synced 2025-10-31 18:39:30 +00:00
b096fa5f3b
Fix typo in ss manpage. Make the backslash visible in ip manpage (http://bugs.debian.org/285507). Strict syntax for ip addr advice in error message. Fix typo in libnetlink(3) manpage (writen -> written). Fix typos in tc-prio(8) manpage. Fix typo in tc-htb(8) manpage (mininum -> minimum). Fix typo in tc-cbq-details(8) manpage (occured -> occurred). Signed-off-by: Andreas Henriksson <andreas@fatal.se> Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
198 lines
4.6 KiB
Groff
198 lines
4.6 KiB
Groff
.TH libnetlink 3
|
|
.SH NAME
|
|
libnetlink \- A library for accessing the netlink service
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <asm/types.h>
|
|
.br
|
|
#include <libnetlink.h>
|
|
.br
|
|
#include <linux/netlink.h>
|
|
.br
|
|
#include <linux/rtnetlink.h>
|
|
.sp
|
|
int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions)
|
|
.sp
|
|
int rtnl_wilddump_request(struct rtnl_handle *rth, int family, int type)
|
|
.sp
|
|
int rtnl_send(struct rtnl_handle *rth, char *buf, int len)
|
|
.sp
|
|
int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len)
|
|
.sp
|
|
int rtnl_dump_filter(struct rtnl_handle *rth,
|
|
int (*filter)(struct sockaddr_nl *, struct nlmsghdr *n, void *),
|
|
void *arg1,
|
|
int (*junk)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
|
|
void *arg2)
|
|
.sp
|
|
int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
|
|
unsigned groups, struct nlmsghdr *answer,
|
|
.br
|
|
int (*junk)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
|
|
.br
|
|
void *jarg)
|
|
.sp
|
|
int rtnl_listen(struct rtnl_handle *rtnl,
|
|
int (*handler)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
|
|
void *jarg)
|
|
.sp
|
|
int rtnl_from_file(FILE *rtnl,
|
|
int (*handler)(struct sockaddr_nl *,struct nlmsghdr *n, void *),
|
|
void *jarg)
|
|
.sp
|
|
int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data)
|
|
.sp
|
|
int addattr_l(struct nlmsghdr *n, int maxlen, int type, void *data, int alen)
|
|
.sp
|
|
int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data)
|
|
.sp
|
|
int rta_addattr_l(struct rtattr *rta, int maxlen, int type, void *data, int alen)
|
|
.SH DESCRIPTION
|
|
libnetlink provides a higher level interface to
|
|
.BR rtnetlink(7).
|
|
The read functions return 0 on success and a negative errno on failure.
|
|
The send functions return the amount of data sent, or -1 on error.
|
|
.TP
|
|
rtnl_open
|
|
Open a rtnetlink socket and save the state into the
|
|
.B rth
|
|
handle. This handle is passed to all subsequent calls.
|
|
.B subscriptions
|
|
is a bitmap of the rtnetlink multicast groups the socket will be
|
|
a member of.
|
|
|
|
.TP
|
|
rtnl_wilddump_request
|
|
Request a full dump of the
|
|
.B type
|
|
database for
|
|
.B family
|
|
addresses.
|
|
.B type
|
|
is a rtnetlink message type.
|
|
.\" XXX
|
|
|
|
.TP
|
|
rtnl_dump_request
|
|
Request a full dump of the
|
|
.B type
|
|
data buffer into
|
|
.B buf
|
|
with maximum length of
|
|
.B len.
|
|
.B type
|
|
is a rtnetlink message type.
|
|
|
|
.TP
|
|
rtnl_dump_filter
|
|
Receive netlink data after a request and filter it.
|
|
The
|
|
.B filter
|
|
callback checks if the received message is wanted. It gets the source
|
|
address of the message, the message itself and
|
|
.B arg1
|
|
as arguments. 0 as return means that the filter passed, a negative
|
|
value is returned
|
|
by
|
|
.I rtnl_dump_filter
|
|
in case of error. NULL for
|
|
.I filter
|
|
means to not use a filter.
|
|
.B junk
|
|
is used to filter messages not destined to the local socket.
|
|
Only one message bundle is received. Unless there is no message
|
|
pending, this function does not block.
|
|
|
|
.TP
|
|
rtnl_listen
|
|
Receive netlink data after a request and pass it to
|
|
.I handler.
|
|
.B handler
|
|
is a callback that gets the message source address, the message itself,
|
|
and the
|
|
.B jarg
|
|
cookie as arguments. It will get called for all received messages.
|
|
Only one message bundle is received. Unless there is no message
|
|
pending this function does not block.
|
|
|
|
.TP
|
|
rtnl_from_file
|
|
Works like
|
|
.I rtnl_listen,
|
|
but reads a netlink message bundle from the file
|
|
.B file
|
|
and passes the messages to
|
|
.B handler
|
|
for parsing. The file contains raw data as received from a rtnetlink socket.
|
|
.PP
|
|
The following functions are useful to construct custom rtnetlink messages. For
|
|
simple database dumping with filtering it is better to use the higher level
|
|
functions above. See
|
|
.BR rtnetlink(3)
|
|
and
|
|
.BR netlink(3)
|
|
on how to generate a rtnetlink message. The following utility functions
|
|
require a continuous buffer that already contains a netlink message header
|
|
and a rtnetlink request.
|
|
|
|
.TP
|
|
rtnl_send
|
|
Send the rtnetlink message in
|
|
.B buf
|
|
of length
|
|
.B len
|
|
to handle
|
|
.B rth.
|
|
|
|
.TP
|
|
addattr32
|
|
Add a __u32 attribute of type
|
|
.B type
|
|
and with value
|
|
.B data
|
|
to netlink message
|
|
.B n,
|
|
which is part of a buffer of length
|
|
.B maxlen.
|
|
|
|
.TP
|
|
addattr_l
|
|
Add a variable length attribute of type
|
|
.B type
|
|
and with value
|
|
.B data
|
|
and
|
|
.B alen
|
|
length to netlink message
|
|
.B n,
|
|
which is part of a buffer of length
|
|
.B maxlen.
|
|
.B data
|
|
is copied.
|
|
|
|
.TP
|
|
rta_addattr32
|
|
Initialize the rtnetlink attribute
|
|
.B rta
|
|
with a __u32 data value.
|
|
|
|
.TP
|
|
rta_addattr32
|
|
Initialize the rtnetlink attribute
|
|
.B rta
|
|
with a variable length data value.
|
|
|
|
.SH BUGS
|
|
The functions sometimes use fprintf and exit when a fatal error occurs.
|
|
This library should be named librtnetlink.
|
|
|
|
.SH AUTHORS
|
|
netlink/rtnetlink was designed and written by Alexey Kuznetsov.
|
|
Andi Kleen wrote the man page.
|
|
|
|
.SH SEE ALSO
|
|
.BR netlink(7),
|
|
.BR rtnetlink(7)
|
|
.br
|
|
/usr/include/linux/rtnetlink.h
|