+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013-2014 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 <netinet/ether.h>
-#include <linux/if.h>
-
-#include "networkd-link.h"
-#include "network-internal.h"
-
-static int ipv4ll_address_lost(Link *link) {
- _cleanup_address_free_ Address *address = NULL;
- _cleanup_route_free_ Route *route = NULL;
- struct in_addr addr;
- int r;
-
- assert(link);
-
- link->ipv4ll_route = false;
- link->ipv4ll_address = false;
-
- r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
- if (r < 0)
- return 0;
-
- log_link_debug(link, "IPv4 link-local release %u.%u.%u.%u", ADDRESS_FMT_VAL(addr));
-
- r = address_new_dynamic(&address);
- if (r < 0) {
- log_link_error(link, "Could not allocate address: %s", strerror(-r));
- return r;
- }
-
- address->family = AF_INET;
- address->in_addr.in = addr;
- address->prefixlen = 16;
- address->scope = RT_SCOPE_LINK;
-
- address_drop(address, link, &link_address_drop_handler);
-
- r = route_new_dynamic(&route, RTPROT_UNSPEC);
- if (r < 0) {
- log_link_error(link, "Could not allocate route: %s",
- strerror(-r));
- return r;
- }
-
- route->family = AF_INET;
- route->scope = RT_SCOPE_LINK;
- route->metrics = IPV4LL_ROUTE_METRIC;
-
- route_drop(route, link, &link_route_drop_handler);
-
- link_client_handler(link);
-
- return 0;
-}
-
-static int ipv4ll_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link);
- assert(!link->ipv4ll_route);
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST) {
- log_link_error(link, "could not set ipv4ll route: %s", strerror(-r));
- link_enter_failed(link);
- }
-
- link->ipv4ll_route = true;
-
- if (link->ipv4ll_address == true)
- link_client_handler(link);
-
- return 1;
-}
-
-static int ipv4ll_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
- _cleanup_link_unref_ Link *link = userdata;
- int r;
-
- assert(link);
- assert(!link->ipv4ll_address);
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0 && r != -EEXIST) {
- log_link_error(link, "could not set ipv4ll address: %s", strerror(-r));
- link_enter_failed(link);
- } else if (r >= 0)
- link_rtnl_process_address(rtnl, m, link->manager);
-
- link->ipv4ll_address = true;
-
- if (link->ipv4ll_route == true)
- link_client_handler(link);
-
- return 1;
-}
-
-static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
- _cleanup_address_free_ Address *ll_addr = NULL;
- _cleanup_route_free_ Route *route = NULL;
- struct in_addr address;
- int r;
-
- assert(ll);
- assert(link);
-
- r = sd_ipv4ll_get_address(ll, &address);
- if (r == -ENOENT)
- return 0;
- else if (r < 0)
- return r;
-
- log_link_debug(link, "IPv4 link-local claim %u.%u.%u.%u",
- ADDRESS_FMT_VAL(address));
-
- r = address_new_dynamic(&ll_addr);
- if (r < 0)
- return r;
-
- ll_addr->family = AF_INET;
- ll_addr->in_addr.in = address;
- ll_addr->prefixlen = 16;
- ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
- ll_addr->scope = RT_SCOPE_LINK;
-
- r = address_configure(ll_addr, link, ipv4ll_address_handler);
- if (r < 0)
- return r;
-
- link->ipv4ll_address = false;
-
- r = route_new_dynamic(&route, RTPROT_STATIC);
- if (r < 0)
- return r;
-
- route->family = AF_INET;
- route->scope = RT_SCOPE_LINK;
- route->metrics = IPV4LL_ROUTE_METRIC;
-
- r = route_configure(route, link, ipv4ll_route_handler);
- if (r < 0)
- return r;
-
- link->ipv4ll_route = false;
-
- return 0;
-}
-
-static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
- Link *link = userdata;
- int r;
-
- assert(link);
- assert(link->network);
- assert(link->manager);
-
- if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
- return;
-
- switch(event) {
- case IPV4LL_EVENT_STOP:
- case IPV4LL_EVENT_CONFLICT:
- r = ipv4ll_address_lost(link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- break;
- case IPV4LL_EVENT_BIND:
- r = ipv4ll_address_claimed(ll, link);
- if (r < 0) {
- link_enter_failed(link);
- return;
- }
- break;
- default:
- if (event < 0)
- log_link_warning(link, "IPv4 link-local error: %s", strerror(-event));
- else
- log_link_warning(link, "IPv4 link-local unknown event: %d", event);
- break;
- }
-}
-
-int ipv4ll_configure(Link *link) {
- uint8_t seed[8];
- int r;
-
- assert(link);
- assert(link->network);
- assert(IN_SET(link->network->link_local, ADDRESS_FAMILY_IPV4, ADDRESS_FAMILY_YES));
-
- r = sd_ipv4ll_new(&link->ipv4ll);
- if (r < 0)
- return r;
-
- if (link->udev_device) {
- r = net_get_unique_predictable_data(link->udev_device, seed);
- if (r >= 0) {
- r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
- if (r < 0)
- return r;
- }
- }
-
- r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
- if (r < 0)
- return r;
-
- r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, link);
- if (r < 0)
- return r;
-
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff