networkd: link - split out ipv4ll handling
This commit is contained in:
Tom Gundersen
parent
431ca2cebb
commit
b22d8a00f4
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@ -4942,6 +4942,7 @@ libsystemd_networkd_core_la_SOURCES = \
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src/libsystemd-network/network-internal.h \
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src/network/networkd.h \
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src/network/networkd-link.h \
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src/network/networkd-ipv4ll.h \
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src/network/networkd-netdev.h \
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src/network/networkd-netdev-tunnel.h \
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src/network/networkd-netdev-veth.h \
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@ -4963,6 +4964,7 @@ libsystemd_networkd_core_la_SOURCES = \
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src/network/networkd-netdev-bond.c \
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src/network/networkd-netdev-bridge.c \
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src/network/networkd-link.c \
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src/network/networkd-ipv4ll.c \
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src/network/networkd-network.c \
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src/network/networkd-address.c \
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src/network/networkd-route.c \
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@ -0,0 +1,248 @@
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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 2013-2014 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-link.h"
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#include "network-internal.h"
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static int ipv4ll_address_lost(Link *link) {
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_cleanup_address_free_ Address *address = NULL;
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_cleanup_route_free_ Route *route = NULL;
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struct in_addr addr;
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int r;
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assert(link);
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link->ipv4ll_route = false;
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link->ipv4ll_address = false;
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r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
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if (r < 0)
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return 0;
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log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
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ADDRESS_FMT_VAL(addr));
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r = address_new_dynamic(&address);
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if (r < 0) {
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log_error_link(link, "Could not allocate address: %s", strerror(-r));
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return r;
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}
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address->family = AF_INET;
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address->in_addr.in = addr;
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address->prefixlen = 16;
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address->scope = RT_SCOPE_LINK;
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address_drop(address, link, &link_address_drop_handler);
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r = route_new_dynamic(&route, RTPROT_UNSPEC);
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if (r < 0) {
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log_error_link(link, "Could not allocate route: %s",
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strerror(-r));
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return r;
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}
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route->family = AF_INET;
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route->scope = RT_SCOPE_LINK;
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route->metrics = IPV4LL_ROUTE_METRIC;
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route_drop(route, link, &link_route_drop_handler);
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link_client_handler(link);
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return 0;
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}
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static int ipv4ll_route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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assert(link);
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assert(!link->ipv4ll_route);
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r = sd_rtnl_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_error_link(link, "could not set ipv4ll route: %s", strerror(-r));
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link_enter_failed(link);
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}
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link->ipv4ll_route = true;
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if (link->ipv4ll_address == true)
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link_client_handler(link);
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return 1;
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}
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static int ipv4ll_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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assert(link);
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assert(!link->ipv4ll_address);
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r = sd_rtnl_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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log_error_link(link, "could not set ipv4ll address: %s", strerror(-r));
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link_enter_failed(link);
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} else if (r >= 0) {
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/* calling handler directly so take a ref */
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link_ref(link);
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link_get_address_handler(rtnl, m, link);
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}
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link->ipv4ll_address = true;
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if (link->ipv4ll_route == true)
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link_client_handler(link);
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return 1;
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}
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static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
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_cleanup_address_free_ Address *ll_addr = NULL;
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_cleanup_route_free_ Route *route = NULL;
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struct in_addr address;
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int r;
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assert(ll);
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assert(link);
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r = sd_ipv4ll_get_address(ll, &address);
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if (r == -ENOENT)
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return 0;
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else if (r < 0)
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return r;
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log_debug_link(link, "IPv4 link-local claim %u.%u.%u.%u",
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ADDRESS_FMT_VAL(address));
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r = address_new_dynamic(&ll_addr);
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if (r < 0)
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return r;
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ll_addr->family = AF_INET;
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ll_addr->in_addr.in = address;
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ll_addr->prefixlen = 16;
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ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
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ll_addr->scope = RT_SCOPE_LINK;
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r = address_configure(ll_addr, link, ipv4ll_address_handler);
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if (r < 0)
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return r;
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link->ipv4ll_address = false;
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r = route_new_dynamic(&route, RTPROT_STATIC);
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if (r < 0)
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return r;
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route->family = AF_INET;
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route->scope = RT_SCOPE_LINK;
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route->metrics = IPV4LL_ROUTE_METRIC;
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r = route_configure(route, link, ipv4ll_route_handler);
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if (r < 0)
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return r;
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link->ipv4ll_route = false;
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return 0;
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}
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static void ipv4ll_handler(sd_ipv4ll *ll, int event, void *userdata){
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Link *link = userdata;
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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->manager);
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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return;
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switch(event) {
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case IPV4LL_EVENT_STOP:
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case IPV4LL_EVENT_CONFLICT:
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r = ipv4ll_address_lost(link);
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if (r < 0) {
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link_enter_failed(link);
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return;
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}
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break;
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case IPV4LL_EVENT_BIND:
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r = ipv4ll_address_claimed(ll, link);
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if (r < 0) {
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link_enter_failed(link);
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return;
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}
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break;
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default:
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if (event < 0)
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log_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
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else
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log_warning_link(link, "IPv4 link-local unknown event: %d", event);
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break;
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}
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}
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int ipv4ll_configure(Link *link) {
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uint8_t seed[8];
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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->network->ipv4ll);
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r = sd_ipv4ll_new(&link->ipv4ll);
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if (r < 0)
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return r;
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if (link->udev_device) {
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r = net_get_unique_predictable_data(link->udev_device, seed);
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if (r >= 0) {
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r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
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if (r < 0)
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return r;
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}
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}
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r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
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if (r < 0)
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return r;
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r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
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if (r < 0)
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return r;
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r = sd_ipv4ll_set_index(link->ipv4ll, link->ifindex);
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if (r < 0)
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return r;
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r = sd_ipv4ll_set_callback(link->ipv4ll, ipv4ll_handler, 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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@ -245,7 +245,7 @@ static int link_stop_clients(Link *link) {
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return r;
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}
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static void link_enter_failed(Link *link) {
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void link_enter_failed(Link *link) {
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assert(link);
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if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
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@ -260,6 +260,17 @@ static void link_enter_failed(Link *link) {
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link_save(link);
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}
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void link_client_handler(Link *link) {
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assert(link);
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if (link->ipv4ll_address && link->ipv4ll_route)
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log_debug_link(link, "IPv4LL configured");
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else
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log_debug_link(link, "IPv4LL not configured");
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return;
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}
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static Address* link_find_dhcp_server_address(Link *link) {
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Address *address;
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@ -428,20 +439,6 @@ static int link_set_dhcp_routes(Link *link) {
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return 0;
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}
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static bool ipv4ll_is_bound(sd_ipv4ll *ll) {
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int r;
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struct in_addr addr;
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if (!ll)
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return false;
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r = sd_ipv4ll_get_address(ll, &addr);
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if (r < 0)
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return false;
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return true;
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}
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static int link_enter_set_routes(Link *link) {
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Route *rt;
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int r;
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@ -464,31 +461,6 @@ static int link_enter_set_routes(Link *link) {
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link->route_messages ++;
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}
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if (ipv4ll_is_bound(link->ipv4ll)) {
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_cleanup_route_free_ Route *route = NULL;
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r = route_new_dynamic(&route, RTPROT_STATIC);
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if (r < 0) {
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log_error_link(link, "Could not allocate route: %s",
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strerror(-r));
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return r;
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}
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route->family = AF_INET;
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route->scope = RT_SCOPE_LINK;
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route->metrics = IPV4LL_ROUTE_METRIC;
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r = route_configure(route, link, &route_handler);
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if (r < 0) {
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log_warning_link(link,
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"could not set routes: %s", strerror(-r));
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link_enter_failed(link);
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return r;
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}
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link->route_messages ++;
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}
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if (link->dhcp_lease) {
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_cleanup_route_free_ Route *route = NULL;
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_cleanup_route_free_ Route *route_gw = NULL;
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@ -561,7 +533,7 @@ static int link_enter_set_routes(Link *link) {
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return 0;
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}
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static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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@ -584,7 +556,7 @@ static int route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata)
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return 1;
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}
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static int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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@ -670,42 +642,6 @@ static int link_enter_set_addresses(Link *link) {
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link->addr_messages ++;
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}
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if (link->ipv4ll) {
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_cleanup_address_free_ Address *ll_addr = NULL;
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struct in_addr addr;
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r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
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if (r < 0 && r != -ENOENT) {
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log_warning_link(link, "IPV4LL error: no address: %s",
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strerror(-r));
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return r;
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}
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if (r != -ENOENT) {
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r = address_new_dynamic(&ll_addr);
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if (r < 0) {
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log_error_link(link, "Could not allocate address: %s", strerror(-r));
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return r;
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}
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ll_addr->family = AF_INET;
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ll_addr->in_addr.in = addr;
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ll_addr->prefixlen = 16;
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ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
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ll_addr->scope = RT_SCOPE_LINK;
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r = address_configure(ll_addr, link, &address_handler);
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if (r < 0) {
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log_warning_link(link,
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"could not set addresses: %s", strerror(-r));
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link_enter_failed(link);
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return r;
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}
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link->addr_messages ++;
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}
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}
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if (link->dhcp_lease) {
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_cleanup_address_free_ Address *address = NULL;
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struct in_addr addr;
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@ -773,7 +709,7 @@ static int link_enter_set_addresses(Link *link) {
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return 0;
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}
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static int address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
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_cleanup_link_unref_ Link *link = userdata;
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int r;
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@ -940,7 +876,7 @@ static int dhcp_lease_lost(Link *link) {
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route->dst_addr.in = routes[i].dst_addr;
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route->dst_prefixlen = routes[i].dst_prefixlen;
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route_drop(route, link, &route_drop_handler);
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route_drop(route, link, &link_route_drop_handler);
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}
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}
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}
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@ -960,7 +896,7 @@ static int dhcp_lease_lost(Link *link) {
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route_gw->dst_prefixlen = 32;
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route_gw->scope = RT_SCOPE_LINK;
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route_drop(route_gw, link, &route_drop_handler);
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route_drop(route_gw, link, &link_route_drop_handler);
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}
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r = route_new_dynamic(&route, RTPROT_UNSPEC);
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@ -968,7 +904,7 @@ static int dhcp_lease_lost(Link *link) {
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route->family = AF_INET;
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route->in_addr.in = gateway;
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route_drop(route, link, &route_drop_handler);
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route_drop(route, link, &link_route_drop_handler);
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}
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}
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@ -980,7 +916,7 @@ static int dhcp_lease_lost(Link *link) {
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address->in_addr.in = addr;
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address->prefixlen = prefixlen;
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address_drop(address, link, &address_drop_handler);
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address_drop(address, link, &link_address_drop_handler);
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}
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if (link->network->dhcp_mtu) {
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@ -1195,109 +1131,6 @@ static void dhcp_handler(sd_dhcp_client *client, int event, void *userdata) {
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return;
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}
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static int ipv4ll_address_lost(Link *link) {
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int r;
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struct in_addr addr;
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assert(link);
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r = sd_ipv4ll_get_address(link->ipv4ll, &addr);
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if (r >= 0) {
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_cleanup_address_free_ Address *address = NULL;
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_cleanup_route_free_ Route *route = NULL;
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log_debug_link(link, "IPv4 link-local release %u.%u.%u.%u",
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ADDRESS_FMT_VAL(addr));
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r = address_new_dynamic(&address);
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if (r < 0) {
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log_error_link(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, &address_drop_handler);
|
||||
|
||||
r = route_new_dynamic(&route, RTPROT_UNSPEC);
|
||||
if (r < 0) {
|
||||
log_error_link(link, "Could not allocate route: %s",
|
||||
strerror(-r));
|
||||
return r;
|
||||
}
|
||||
|
||||
route->family = AF_INET;
|
||||
route->scope = RT_SCOPE_LINK;
|
||||
route->metrics = 99;
|
||||
|
||||
route_drop(route, link, &route_drop_handler);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
|
||||
struct in_addr address;
|
||||
int r;
|
||||
|
||||
assert(ll);
|
||||
assert(link);
|
||||
|
||||
r = sd_ipv4ll_get_address(ll, &address);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
log_struct_link(LOG_INFO, link,
|
||||
"MESSAGE=%-*s: IPv4 link-local address %u.%u.%u.%u",
|
||||
IFNAMSIZ,
|
||||
link->ifname,
|
||||
ADDRESS_FMT_VAL(address),
|
||||
NULL);
|
||||
|
||||
link_enter_set_addresses(link);
|
||||
|
||||
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_warning_link(link, "IPv4 link-local error: %s", strerror(-event));
|
||||
else
|
||||
log_warning_link(link, "IPv4 link-local unknown event: %d", event);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
|
||||
Link *link = userdata;
|
||||
|
||||
|
|
@ -1766,37 +1599,11 @@ static int link_configure(Link *link) {
|
|||
int r;
|
||||
|
||||
assert(link);
|
||||
assert(link->network);
|
||||
assert(link->state == LINK_STATE_INITIALIZING);
|
||||
|
||||
if (link->network->ipv4ll) {
|
||||
uint8_t seed[8];
|
||||
|
||||
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);
|
||||
r = ipv4ll_configure(link);
|
||||
if (r < 0)
|
||||
return r;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -76,7 +76,10 @@ struct Link {
|
|||
sd_dhcp_lease *dhcp_lease;
|
||||
char *lease_file;
|
||||
uint16_t original_mtu;
|
||||
|
||||
sd_ipv4ll *ipv4ll;
|
||||
bool ipv4ll_address;
|
||||
bool ipv4ll_route;
|
||||
|
||||
LIST_HEAD(Address, pool_addresses);
|
||||
|
||||
|
|
@ -92,15 +95,24 @@ int link_get(Manager *m, int ifindex, Link **ret);
|
|||
int link_add(Manager *manager, sd_rtnl_message *message, Link **ret);
|
||||
void link_drop(Link *link);
|
||||
|
||||
int link_get_address_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata);
|
||||
int link_address_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata);
|
||||
int link_route_drop_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata);
|
||||
|
||||
void link_enter_failed(Link *link);
|
||||
int link_initialized(Link *link, struct udev_device *device);
|
||||
|
||||
void link_client_handler(Link *link);
|
||||
|
||||
int link_update(Link *link, sd_rtnl_message *message);
|
||||
int link_rtnl_process_address(sd_rtnl *rtnl, sd_rtnl_message *message, void *userdata);
|
||||
|
||||
int link_initialized(Link *link, struct udev_device *device);
|
||||
|
||||
int link_save(Link *link);
|
||||
|
||||
bool link_has_carrier(unsigned flags, uint8_t operstate);
|
||||
|
||||
int ipv4ll_configure(Link *link);
|
||||
|
||||
const char* link_state_to_string(LinkState s) _const_;
|
||||
LinkState link_state_from_string(const char *s) _pure_;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue