2013-10-17 03:18:36 +02:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Tom Gundersen <teg@jklm.no>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <netinet/ether.h>
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#include <linux/if.h>
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#include "networkd.h"
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#include "libudev-private.h"
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#include "util.h"
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int link_new(Manager *manager, struct udev_device *device, Link **ret) {
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_cleanup_link_free_ Link *link = NULL;
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2013-11-17 21:01:20 +01:00
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const char *mac;
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2013-11-21 20:47:34 +01:00
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struct ether_addr *mac_addr;
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2013-10-17 03:18:36 +02:00
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int r;
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assert(device);
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assert(ret);
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link = new0(Link, 1);
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if (!link)
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return -ENOMEM;
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2013-11-21 21:04:04 +01:00
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link->manager = manager;
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link->state = _LINK_STATE_INVALID;
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2013-11-18 11:54:09 +01:00
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link->ifindex = udev_device_get_ifindex(device);
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if (link->ifindex <= 0)
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2013-10-17 03:18:36 +02:00
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return -EINVAL;
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2013-11-17 21:01:20 +01:00
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mac = udev_device_get_sysattr_value(device, "address");
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2013-11-21 21:04:04 +01:00
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if (mac) {
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mac_addr = ether_aton(mac);
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if (mac_addr)
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memcpy(&link->mac, mac_addr, sizeof(struct ether_addr));
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}
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2013-10-17 03:18:36 +02:00
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2013-11-18 11:54:09 +01:00
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r = hashmap_put(manager->links, &link->ifindex, link);
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2013-10-17 03:18:36 +02:00
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if (r < 0)
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return r;
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*ret = link;
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link = NULL;
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return 0;
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}
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void link_free(Link *link) {
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if (!link)
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return;
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2013-11-18 11:54:09 +01:00
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assert(link->manager);
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2013-10-17 03:18:36 +02:00
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2013-11-18 11:54:09 +01:00
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hashmap_remove(link->manager->links, &link->ifindex);
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2013-10-17 03:18:36 +02:00
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free(link);
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}
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int link_add(Manager *m, struct udev_device *device) {
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Link *link;
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Network *network;
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int r;
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uint64_t ifindex;
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assert(m);
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assert(device);
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ifindex = udev_device_get_ifindex(device);
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link = hashmap_get(m->links, &ifindex);
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if (link)
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return 0;
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r = link_new(m, device, &link);
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if (r < 0) {
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log_error("could not create link: %s", strerror(-r));
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return r;
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}
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r = network_get(m, device, &network);
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if (r < 0)
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return r == -ENOENT ? 0 : r;
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r = network_apply(m, network, link);
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if (r < 0)
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return r;
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return 0;
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}
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2013-11-14 16:22:51 +01:00
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static int link_enter_configured(Link *link) {
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log_info("Link configured successfully.");
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link->state = LINK_STATE_CONFIGURED;
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return 0;
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}
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static int link_enter_failed(Link *link) {
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log_warning("Could not configure link.");
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link->state = LINK_STATE_FAILED;
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return 0;
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}
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static bool link_is_up(Link *link) {
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return link->flags & IFF_UP;
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}
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static int link_enter_routes_set(Link *link) {
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2013-11-26 00:19:10 +01:00
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log_info("Routes set for link %ju", link->ifindex);
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2013-11-14 16:22:51 +01:00
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if (link_is_up(link))
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return link_enter_configured(link);
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link->state = LINK_STATE_ROUTES_SET;
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return 0;
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}
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static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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Link *link = userdata;
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int r;
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assert(link->rtnl_messages > 0);
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assert(link->state == LINK_STATE_SET_ROUTES || link->state == LINK_STATE_FAILED);
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link->rtnl_messages --;
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if (link->state == LINK_STATE_FAILED)
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return 1;
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r = sd_rtnl_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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2013-11-26 00:19:10 +01:00
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log_warning("Could not set route on interface %ju: %s",
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link->ifindex, strerror(-r));
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2013-11-14 16:22:51 +01:00
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return link_enter_failed(link);
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}
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if (link->rtnl_messages == 0)
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return link_enter_routes_set(link);
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return 1;
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}
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static int link_enter_set_routes(Link *link) {
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Route *route;
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int r;
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assert(link);
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assert(link->network);
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assert(link->rtnl_messages == 0);
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assert(link->state == LINK_STATE_ADDRESSES_SET);
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link->state = LINK_STATE_SET_ROUTES;
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if (!link->network->routes)
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return link_enter_routes_set(link);
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LIST_FOREACH(routes, route, link->network->routes) {
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r = route_configure(route, link, &route_handler);
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if (r < 0)
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link_enter_failed(link);
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}
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return 0;
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}
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static int link_enter_addresses_set(Link *link) {
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2013-11-26 00:19:10 +01:00
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log_info("Addresses set for link %ju", link->ifindex);
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2013-11-14 16:22:51 +01:00
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link->state = LINK_STATE_ADDRESSES_SET;
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return link_enter_set_routes(link);
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}
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static int address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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Link *link = userdata;
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int r;
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assert(link->rtnl_messages > 0);
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assert(link->state == LINK_STATE_SET_ADDRESSES || link->state == LINK_STATE_FAILED);
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link->rtnl_messages --;
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if (link->state == LINK_STATE_FAILED)
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return 1;
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r = sd_rtnl_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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2013-11-26 00:19:10 +01:00
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log_warning("Could not set address on interface %ju: %s",
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link->ifindex, strerror(-r));
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2013-11-14 16:22:51 +01:00
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link_enter_failed(link);
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}
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if (link->rtnl_messages == 0)
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link_enter_addresses_set(link);
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return 1;
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}
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static int link_enter_set_addresses(Link *link) {
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Address *address;
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int r;
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assert(link);
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assert(link->network);
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assert(link->rtnl_messages == 0);
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if (!link->network->addresses)
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return link_enter_addresses_set(link);
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link->state = LINK_STATE_SET_ADDRESSES;
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LIST_FOREACH(addresses, address, link->network->addresses) {
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r = address_configure(address, link, &address_handler);
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if (r < 0)
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link_enter_failed(link);
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}
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return 0;
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}
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static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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Link *link = userdata;
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int r;
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r = sd_rtnl_message_get_errno(m);
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if (r < 0) {
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2013-11-26 00:19:10 +01:00
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log_warning("Could not bring up interface %ju: %s",
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link->ifindex, strerror(-r));
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2013-11-14 16:22:51 +01:00
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return link_enter_failed(link);
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}
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link->flags |= IFF_UP;
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log_info("Link is UP.");
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if (link->state == LINK_STATE_ROUTES_SET)
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return link_enter_configured(link);
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return 1;
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}
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static int link_up(Link *link) {
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2013-10-17 03:18:36 +02:00
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_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
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int r;
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2013-11-14 16:22:51 +01:00
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assert(link);
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assert(link->manager);
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assert(link->manager->rtnl);
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2013-10-17 03:18:36 +02:00
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r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req);
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if (r < 0) {
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log_error("Could not allocate RTM_NEWLINK message");
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return r;
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}
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2013-11-14 16:22:51 +01:00
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r = sd_rtnl_call_async(link->manager->rtnl, req, link_handler, link, 0, NULL);
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2013-10-17 03:18:36 +02:00
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if (r < 0) {
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2013-11-14 16:22:51 +01:00
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log_error("Could not send rtnetlink message: %s", strerror(-r));
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2013-10-17 03:18:36 +02:00
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return r;
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}
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2013-11-14 16:22:51 +01:00
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return 0;
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}
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int link_configure(Link *link) {
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int r;
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r = link_up(link);
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if (r < 0)
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return link_enter_failed(link);
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r = link_enter_set_addresses(link);
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if (r < 0)
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return link_enter_failed(link);
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2013-10-17 03:18:36 +02:00
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return 0;
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}
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