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rtnl: add function rtnl_get_ts_label to get interface ts_label info 

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
master
Hangbin Liu 2017-10-09 22:31:43 +08:00 committed by Richard Cochran
parent 80bc4d4c2f
commit 6d1e2a62bd
2 changed files with 40 additions and 0 deletions
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31
rtnl.c
View File

@ -43,6 +43,37 @@ int rtnl_close(int fd)
return close(fd);
}
static void rtnl_get_ts_label_callback(void *ctx, int linkup, int ts_index)
{
int *dst = ctx;
*dst = ts_index;
}
int rtnl_get_ts_label(struct interface *iface)
{
int err, fd;
int ts_index = -1;
fd = rtnl_open();
if (fd < 0)
return fd;
err = rtnl_link_query(fd, iface->name);
if (err) {
goto no_info;
}
rtnl_link_status(fd, iface->name, rtnl_get_ts_label_callback, &ts_index);
if (ts_index > 0 && if_indextoname(ts_index, iface->ts_label))
err = 0;
else
err = -1;
no_info:
rtnl_close(fd);
return err;
}
int rtnl_link_query(int fd, char *device)
{
struct sockaddr_nl sa;

9
rtnl.h
View File

@ -20,6 +20,8 @@
#ifndef HAVE_RTNL_H
#define HAVE_RTNL_H
#include "config.h"
typedef void (*rtnl_callback)(void *ctx, int linkup, int ts_index);
/**
@ -29,6 +31,13 @@ typedef void (*rtnl_callback)(void *ctx, int linkup, int ts_index);
*/
int rtnl_close(int fd);
/**
* Get interface ts_label information
* @param iface struct interface.
* @return Zero on success, or -1 on error.
*/
int rtnl_get_ts_label(struct interface *iface);
/**
* Request the link status from the kernel.
* @param fd A socket obtained via rtnl_open().