diff options
Diffstat (limited to 'src/grp-network/libnetworkd-core/networkd-dhcp6.c')
| -rw-r--r-- | src/grp-network/libnetworkd-core/networkd-dhcp6.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/src/grp-network/libnetworkd-core/networkd-dhcp6.c b/src/grp-network/libnetworkd-core/networkd-dhcp6.c new file mode 100644 index 0000000000..d00190c520 --- /dev/null +++ b/src/grp-network/libnetworkd-core/networkd-dhcp6.c @@ -0,0 +1,266 @@ +/*** + This file is part of systemd. + + Copyright (C) 2014 Intel Corporation. All rights reserved. + + 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 "systemd-network/network-internal.h" +#include "systemd-network/sd-dhcp6-client.h" + +#include "networkd.h" + +static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link); + +static int dhcp6_lease_information_acquired(sd_dhcp6_client *client, + Link *link) { + return 0; +} + +static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m, + void *userdata) { + _cleanup_link_unref_ Link *link = userdata; + int r; + + assert(link); + + r = sd_netlink_message_get_errno(m); + if (r < 0 && r != -EEXIST) { + if (link->rtnl_extended_attrs) { + log_link_warning(link, "Could not set extended netlink attributes, reverting to fallback mechanism"); + + link->rtnl_extended_attrs = false; + dhcp6_lease_address_acquired(link->dhcp6_client, link); + + return 1; + } + + log_link_error_errno(link, r, "Could not set DHCPv6 address: %m"); + + link_enter_failed(link); + + } else if (r >= 0) + manager_rtnl_process_address(rtnl, m, link->manager); + + return 1; +} + +static int dhcp6_address_change( + Link *link, + struct in6_addr *ip6_addr, + uint32_t lifetime_preferred, + uint32_t lifetime_valid) { + + _cleanup_address_free_ Address *addr = NULL; + char buffer[INET6_ADDRSTRLEN]; + int r; + + r = address_new(&addr); + if (r < 0) + return r; + + addr->family = AF_INET6; + memcpy(&addr->in_addr.in6, ip6_addr, sizeof(*ip6_addr)); + + addr->flags = IFA_F_NOPREFIXROUTE; + addr->prefixlen = 128; + + addr->cinfo.ifa_prefered = lifetime_preferred; + addr->cinfo.ifa_valid = lifetime_valid; + + log_link_info(link, + "DHCPv6 address %s/%d timeout preferred %d valid %d", + inet_ntop(AF_INET6, &addr->in_addr.in6, buffer, sizeof(buffer)), + addr->prefixlen, lifetime_preferred, lifetime_valid); + + r = address_configure(addr, link, dhcp6_address_handler, true); + if (r < 0) + log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m"); + + return r; +} + +static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link) { + int r; + sd_dhcp6_lease *lease; + struct in6_addr ip6_addr; + uint32_t lifetime_preferred, lifetime_valid; + + r = sd_dhcp6_client_get_lease(client, &lease); + if (r < 0) + return r; + + sd_dhcp6_lease_reset_address_iter(lease); + + while (sd_dhcp6_lease_get_address(lease, &ip6_addr, + &lifetime_preferred, + &lifetime_valid) >= 0) { + + r = dhcp6_address_change(link, &ip6_addr, lifetime_preferred, lifetime_valid); + if (r < 0) + return r; + } + + return 0; +} + +static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) { + int r; + Link *link = userdata; + + assert(link); + assert(link->network); + assert(link->manager); + + if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER)) + return; + + switch(event) { + case SD_DHCP6_CLIENT_EVENT_STOP: + case SD_DHCP6_CLIENT_EVENT_RESEND_EXPIRE: + case SD_DHCP6_CLIENT_EVENT_RETRANS_MAX: + if (sd_dhcp6_client_get_lease(client, NULL) >= 0) + log_link_warning(link, "DHCPv6 lease lost"); + + link->dhcp6_configured = false; + break; + + case SD_DHCP6_CLIENT_EVENT_IP_ACQUIRE: + r = dhcp6_lease_address_acquired(client, link); + if (r < 0) { + link_enter_failed(link); + return; + } + + /* fall through */ + case SD_DHCP6_CLIENT_EVENT_INFORMATION_REQUEST: + r = dhcp6_lease_information_acquired(client, link); + if (r < 0) { + link_enter_failed(link); + return; + } + + link->dhcp6_configured = true; + break; + + default: + if (event < 0) + log_link_warning_errno(link, event, "DHCPv6 error: %m"); + else + log_link_warning(link, "DHCPv6 unknown event: %d", event); + return; + } + + link_check_ready(link); +} + +int dhcp6_request_address(Link *link, int ir) { + int r, inf_req; + bool running; + + assert(link); + assert(link->dhcp6_client); + assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0); + + r = sd_dhcp6_client_is_running(link->dhcp6_client); + if (r < 0) + return r; + else + running = !!r; + + if (running) { + r = sd_dhcp6_client_get_information_request(link->dhcp6_client, &inf_req); + if (r < 0) + return r; + + if (inf_req == ir) + return 0; + + r = sd_dhcp6_client_stop(link->dhcp6_client); + if (r < 0) + return r; + } else { + r = sd_dhcp6_client_set_local_address(link->dhcp6_client, &link->ipv6ll_address); + if (r < 0) + return r; + } + + r = sd_dhcp6_client_set_information_request(link->dhcp6_client, ir); + if (r < 0) + return r; + + r = sd_dhcp6_client_start(link->dhcp6_client); + if (r < 0) + return r; + + return 0; +} + +int dhcp6_configure(Link *link) { + sd_dhcp6_client *client = NULL; + int r; + const DUID *duid; + + assert(link); + + if (link->dhcp6_client) + return 0; + + r = sd_dhcp6_client_new(&client); + if (r < 0) + return r; + + r = sd_dhcp6_client_attach_event(client, NULL, 0); + if (r < 0) + goto error; + + r = sd_dhcp6_client_set_mac(client, + (const uint8_t *) &link->mac, + sizeof (link->mac), ARPHRD_ETHER); + if (r < 0) + goto error; + + r = sd_dhcp6_client_set_iaid(client, link->network->iaid); + if (r < 0) + goto error; + + duid = link_duid(link); + r = sd_dhcp6_client_set_duid(client, + duid->type, + duid->raw_data_len > 0 ? duid->raw_data : NULL, + duid->raw_data_len); + if (r < 0) + goto error; + + r = sd_dhcp6_client_set_ifindex(client, link->ifindex); + if (r < 0) + goto error; + + r = sd_dhcp6_client_set_callback(client, dhcp6_handler, link); + if (r < 0) + goto error; + + link->dhcp6_client = client; + + return 0; + +error: + sd_dhcp6_client_unref(client); + return r; +} |