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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <linux/rtnetlink.h>
#include <netinet/ether.h>
#include "sd-rtnl.h"
#include "rtnl-util.h"
#include "rtnl-internal.h"
int rtnl_set_link_name(sd_rtnl *rtnl, int ifindex, const char *name) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *message = NULL;
int r;
assert(rtnl);
assert(ifindex > 0);
assert(name);
r = sd_rtnl_message_link_new(RTM_SETLINK, ifindex, &message);
if (r < 0)
return r;
r = sd_rtnl_message_append_string(message, IFLA_IFNAME, name);
if (r < 0)
return r;
r = sd_rtnl_call(rtnl, message, 0, NULL);
if (r < 0)
return r;
return 0;
}
int rtnl_set_link_properties(sd_rtnl *rtnl, int ifindex, const char *alias,
const struct ether_addr *mac, unsigned mtu) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *message = NULL;
bool need_update = false;
int r;
assert(rtnl);
assert(ifindex > 0);
if (!alias && !mac && mtu == 0)
return 0;
r = sd_rtnl_message_link_new(RTM_SETLINK, ifindex, &message);
if (r < 0)
return r;
if (alias) {
r = sd_rtnl_message_append_string(message, IFLA_IFALIAS, alias);
if (r < 0)
return r;
need_update = true;
}
if (mac) {
r = sd_rtnl_message_append_ether_addr(message, IFLA_ADDRESS, mac);
if (r < 0)
return r;
need_update = true;
}
if (mtu > 0) {
r = sd_rtnl_message_append_u32(message, IFLA_MTU, mtu);
if (r < 0)
return r;
need_update = true;
}
if (need_update) {
r = sd_rtnl_call(rtnl, message, 0, NULL);
if (r < 0)
return r;
}
return 0;
}
int rtnl_message_new_synthetic_error(int error, uint32_t serial, sd_rtnl_message **ret) {
struct nlmsgerr *err;
int r;
assert(error <= 0);
r = message_new(ret, NLMSG_SPACE(sizeof(struct nlmsgerr)));
if (r < 0)
return r;
(*ret)->hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct nlmsgerr));
(*ret)->hdr->nlmsg_type = NLMSG_ERROR;
(*ret)->hdr->nlmsg_seq = serial;
err = NLMSG_DATA((*ret)->hdr);
err->error = error;
return 0;
}
bool rtnl_message_type_is_route(uint16_t type) {
switch (type) {
case RTM_NEWROUTE:
case RTM_GETROUTE:
case RTM_DELROUTE:
return true;
default:
return false;
}
}
bool rtnl_message_type_is_link(uint16_t type) {
switch (type) {
case RTM_NEWLINK:
case RTM_SETLINK:
case RTM_GETLINK:
case RTM_DELLINK:
return true;
default:
return false;
}
}
bool rtnl_message_type_is_addr(uint16_t type) {
switch (type) {
case RTM_NEWADDR:
case RTM_GETADDR:
case RTM_DELADDR:
return true;
default:
return false;
}
}
int rtnl_message_link_get_ifname(sd_rtnl_message *message, const char **ret) {
unsigned short type;
void *name;
assert(rtnl_message_type_is_link(message->hdr->nlmsg_type));
while (sd_rtnl_message_read(message, &type, &name)) {
if (type == IFLA_IFNAME) {
*ret = name;
return 0;
}
}
return -ENOENT;
}
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