04c0136989
Exported header files should not include internal headers. Fix that. Exported header files should not use the bool type. So far we opted to stick to C89 for exported headers, and hence use "int" for bools in them. Continue to do so. Exported header files should have #include lines for everything they use including inttypes.h and sys/types.h, so that they may be included in any order. Exported header files should have C++ guards, hence add them. Exported header files should not use gcc extensions like #pragma once, get rid of it.
248 lines
8 KiB
C
248 lines
8 KiB
C
/*-*- 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 (C) 2014 Intel Corporation. All rights reserved.
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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 "sd-dhcp6-client.h"
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#include "network-internal.h"
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#include "networkd-link.h"
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static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link);
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static int dhcp6_lease_information_acquired(sd_dhcp6_client *client,
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Link *link) {
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return 0;
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}
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static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
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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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r = sd_netlink_message_get_errno(m);
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if (r < 0 && r != -EEXIST) {
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if (link->rtnl_extended_attrs) {
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log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism");
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link->rtnl_extended_attrs = false;
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dhcp6_lease_address_acquired(link->dhcp6_client, link);
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return 1;
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}
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log_link_error_errno(link, r, "Could not set DHCPv6 address: %m");
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link_enter_failed(link);
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} else if (r >= 0)
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manager_rtnl_process_address(rtnl, m, link->manager);
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return 1;
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}
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static int dhcp6_address_change(Link *link, struct in6_addr *ip6_addr,
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uint32_t lifetime_preferred, uint32_t lifetime_valid) {
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int r;
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_cleanup_address_free_ Address *addr = NULL;
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r = address_new(&addr);
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if (r < 0)
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return r;
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addr->family = AF_INET6;
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memcpy(&addr->in_addr.in6, ip6_addr, sizeof(*ip6_addr));
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addr->flags = IFA_F_NOPREFIXROUTE;
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addr->prefixlen = 128;
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addr->cinfo.ifa_prefered = lifetime_preferred;
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addr->cinfo.ifa_valid = lifetime_valid;
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log_link_info(link,
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"DHCPv6 address "SD_NDISC_ADDRESS_FORMAT_STR"/%d timeout preferred %d valid %d",
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SD_NDISC_ADDRESS_FORMAT_VAL(addr->in_addr.in6),
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addr->prefixlen, lifetime_preferred, lifetime_valid);
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r = address_configure(addr, link, dhcp6_address_handler, true);
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if (r < 0)
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log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m");
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return r;
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}
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static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) {
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int r;
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sd_dhcp6_lease *lease;
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struct in6_addr ip6_addr;
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uint32_t lifetime_preferred, lifetime_valid;
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r = sd_dhcp6_client_get_lease(client, &lease);
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if (r < 0)
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return r;
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sd_dhcp6_lease_reset_address_iter(lease);
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while (sd_dhcp6_lease_get_address(lease, &ip6_addr,
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&lifetime_preferred,
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&lifetime_valid) >= 0) {
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r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid);
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if (r < 0)
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return r;
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}
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return 0;
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}
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static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
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int r;
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Link *link = userdata;
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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 SD_DHCP6_CLIENT_EVENT_STOP:
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case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE:
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case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX:
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log_link_warning(link, "DHCPv6 lease lost");
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link->dhcp6_configured = false;
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break;
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case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE:
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r = dhcp6_lease_address_acquired(client, 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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/* fall through */
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case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST:
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r = dhcp6_lease_information_acquired(client, 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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link->dhcp6_configured = true;
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break;
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default:
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if (event < 0)
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log_link_warning_errno(link, event, "DHCPv6 error: %m");
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else
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log_link_warning(link, "DHCPv6 unknown event: %d", event);
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return;
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}
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link_check_ready(link);
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}
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int dhcp6_configure(Link *link, bool inf_req) {
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int r, information_request;
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assert_return(link, -EINVAL);
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link->dhcp6_configured = false;
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if (link->dhcp6_client) {
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r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &information_request);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not get DHCPv6 Information request setting: %m");
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goto error;
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}
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if (information_request && !inf_req) {
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r = sd_dhcp6_client_stop(link->dhcp6_client);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not stop DHCPv6 while setting Managed mode: %m");
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goto error;
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}
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r = sd_dhcp6_client_set_information_request(link->dhcp6_client, false);
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if (r < 0) {
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log_link_warning_errno(link, r, "Could not unset DHCPv6 Information request: %m");
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goto error;
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}
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}
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r = sd_dhcp6_client_start(link->dhcp6_client);
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if (r < 0 && r != -EALREADY) {
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log_link_warning_errno(link, r, "Could not restart DHCPv6: %m");
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goto error;
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}
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if (r == -EALREADY)
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link->dhcp6_configured = true;
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return r;
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}
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r = sd_dhcp6_client_new(&link->dhcp6_client);
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if (r < 0)
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goto error;
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r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
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if (r < 0)
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goto error;
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r = sd_dhcp6_client_set_mac(link->dhcp6_client,
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(const uint8_t *) &link->mac,
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sizeof (link->mac), ARPHRD_ETHER);
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if (r < 0)
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goto error;
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r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
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if (r < 0)
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goto error;
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r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
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link);
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if (r < 0)
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goto error;
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if (inf_req) {
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r = sd_dhcp6_client_set_information_request(link->dhcp6_client, true);
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if (r < 0)
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goto error;
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}
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r = sd_dhcp6_client_start(link->dhcp6_client);
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if (r < 0)
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goto error;
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return r;
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error:
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link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
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return r;
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}
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