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Systemd/src/network/networkd-dhcp6.c

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networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 "networkd-link.h"
#include "network-internal.h"
#include "sd-icmp6-nd.h"
#include "sd-dhcp6-client.h"
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link);
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
static int dhcp6_lease_information_acquired(sd_dhcp6_client *client,
Link *link) {
return 0;
}
sd-netlink: rename from sd-rtnl
2015-06-12 16:31:33 +02:00
static int dhcp6_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
void *userdata) {
_cleanup_link_unref_ Link *link = userdata;
int r;
assert(link);
sd-netlink: rename from sd-rtnl
2015-06-12 16:31:33 +02:00
r = sd_netlink_message_get_errno(m);
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
if (r < 0 && r != -EEXIST) {
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
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;
}
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
log_link_error(link, "Could not set DHCPv6 address: %s",
strerror(-r));
link_enter_failed(link);
} else if (r >= 0)
link_rtnl_process_address(rtnl, m, link->manager);
return 1;
}
static int dhcp6_address_update(Link *link, struct in6_addr *ip6_addr,
uint8_t prefixlen, uint32_t lifetime_preferred,
uint32_t lifetime_valid) {
int r;
_cleanup_address_free_ Address *addr = NULL;
r = address_new_dynamic(&addr);
if (r < 0)
return r;
addr->family = AF_INET6;
memcpy(&addr->in_addr.in6, ip6_addr, sizeof(*ip6_addr));
systemd-networkd: Use IFA_F_NOPREFIXROUTE with IPv6 addresses The IFA_F_NOPREFIXROUTE flag prevents the kernel from creating new onlink prefixes when a DHCPv6 IPv6 address with a prefix length is set from user space. IPv6 routing will follow the onlink status from Router Advertisment Prefix Information options or any manually set route, which is the correct thing to do. As this flag has a larger value than what fits into an unsigned char, update the flag attribute to an uint32_t and set it with an IFA_FLAGS attribute when writing netlink messages to the kernel.
2015-02-02 12:13:17 +01:00
addr->flags = IFA_F_NOPREFIXROUTE;
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
addr->prefixlen = prefixlen;
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
addr->cinfo.ifa_prefered = lifetime_preferred;
addr->cinfo.ifa_valid = lifetime_valid;
core,network: major per-object logging rework This changes log_unit_info() (and friends) to take a real Unit* object insted of just a unit name as parameter. The call will now prefix all logged messages with the unit name, thus allowing the unit name to be dropped from the various passed romat strings, simplifying invocations drastically, and unifying log output across messages. Also, UNIT= vs. USER_UNIT= is now derived from the Manager object attached to the Unit object, instead of getpid(). This has the benefit of correcting the field for --test runs. Also contains a couple of other logging improvements: - Drops a couple of strerror() invocations in favour of using %m. - Not only .mount units now warn if a symlinks exist for the mount point already, .automount units do that too, now. - A few invocations of log_struct() that didn't actually pass any additional structured data have been replaced by simpler invocations of log_unit_info() and friends. - For structured data a new LOG_UNIT_MESSAGE() macro has been added, that works like LOG_MESSAGE() but prefixes the message with the unit name. Similar, there's now LOG_LINK_MESSAGE() and LOG_NETDEV_MESSAGE(). - For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(), LOG_NETDEV_INTERFACE() macros have been added that generate the necessary per object fields. The old log_unit_struct() call has been removed in favour of these new macros used in raw log_struct() invocations. In addition to removing one more function call this allows generated structured log messages that contain two object fields, as necessary for example for network interfaces that are joined into another network interface, and whose messages shall be indexed by both. - The LOG_ERRNO() macro has been removed, in favour of log_struct_errno(). The latter has the benefit of ensuring that %m in format strings is properly resolved to the specified error number. - A number of logging messages have been converted to use log_unit_info() instead of log_info() - The client code in sysv-generator no longer #includes core code from src/core/. - log_unit_full_errno() has been removed, log_unit_full() instead takes an errno now, too. - log_unit_info(), log_link_info(), log_netdev_info() and friends, now avoid double evaluation of their parameters
2015-05-11 20:38:21 +02:00
log_link_info(link,
"DHCPv6 address "SD_ICMP6_ADDRESS_FORMAT_STR"/%d timeout preferred %d valid %d",
SD_ICMP6_ADDRESS_FORMAT_VAL(addr->in_addr.in6),
addr->prefixlen, lifetime_preferred, lifetime_valid);
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
r = address_update(addr, link, dhcp6_address_handler);
if (r < 0)
core,network: major per-object logging rework This changes log_unit_info() (and friends) to take a real Unit* object insted of just a unit name as parameter. The call will now prefix all logged messages with the unit name, thus allowing the unit name to be dropped from the various passed romat strings, simplifying invocations drastically, and unifying log output across messages. Also, UNIT= vs. USER_UNIT= is now derived from the Manager object attached to the Unit object, instead of getpid(). This has the benefit of correcting the field for --test runs. Also contains a couple of other logging improvements: - Drops a couple of strerror() invocations in favour of using %m. - Not only .mount units now warn if a symlinks exist for the mount point already, .automount units do that too, now. - A few invocations of log_struct() that didn't actually pass any additional structured data have been replaced by simpler invocations of log_unit_info() and friends. - For structured data a new LOG_UNIT_MESSAGE() macro has been added, that works like LOG_MESSAGE() but prefixes the message with the unit name. Similar, there's now LOG_LINK_MESSAGE() and LOG_NETDEV_MESSAGE(). - For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(), LOG_NETDEV_INTERFACE() macros have been added that generate the necessary per object fields. The old log_unit_struct() call has been removed in favour of these new macros used in raw log_struct() invocations. In addition to removing one more function call this allows generated structured log messages that contain two object fields, as necessary for example for network interfaces that are joined into another network interface, and whose messages shall be indexed by both. - The LOG_ERRNO() macro has been removed, in favour of log_struct_errno(). The latter has the benefit of ensuring that %m in format strings is properly resolved to the specified error number. - A number of logging messages have been converted to use log_unit_info() instead of log_info() - The client code in sysv-generator no longer #includes core code from src/core/. - log_unit_full_errno() has been removed, log_unit_full() instead takes an errno now, too. - log_unit_info(), log_link_info(), log_netdev_info() and friends, now avoid double evaluation of their parameters
2015-05-11 20:38:21 +02:00
log_link_warning_errno(link, r, "Could not assign DHCPv6 address: %m");
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
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;
uint8_t prefixlen;
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 = sd_icmp6_ra_get_prefixlen(link->icmp6_router_discovery,
&ip6_addr, &prefixlen);
if (r < 0 && r != -EADDRNOTAVAIL) {
log_link_warning(link, "Could not get prefix information: %s",
strerror(-r));
return r;
}
if (r == -EADDRNOTAVAIL)
prefixlen = 128;
r = dhcp6_address_update(link, &ip6_addr, prefixlen,
lifetime_preferred, lifetime_valid);
if (r < 0)
return r;
}
return 0;
}
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
static void dhcp6_handler(sd_dhcp6_client *client, int event, void *userdata) {
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
int r;
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
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 DHCP6_EVENT_STOP:
case DHCP6_EVENT_RESEND_EXPIRE:
case DHCP6_EVENT_RETRANS_MAX:
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
log_link_debug(link, "DHCPv6 event %d", event);
break;
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
case DHCP6_EVENT_IP_ACQUIRE:
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
r = dhcp6_lease_address_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
/* fall through */
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
case DHCP6_EVENT_INFORMATION_REQUEST:
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
r = dhcp6_lease_information_acquired(client, link);
if (r < 0) {
link_enter_failed(link);
return;
}
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
break;
default:
if (event < 0)
log_link_warning(link, "DHCPv6 error: %s",
strerror(-event));
else
log_link_warning(link, "DHCPv6 unknown event: %d",
event);
return;
}
}
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
static int dhcp6_configure(Link *link, int event) {
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
int r;
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
bool information_request;
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
assert_return(link, -EINVAL);
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
if (link->dhcp6_client) {
if (event != ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED)
return 0;
r = sd_dhcp6_client_get_information_request(link->dhcp6_client,
&information_request);
if (r < 0) {
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
log_link_warning(link, "Could not get DHCPv6 Information request setting: %s",
strerror(-r));
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
if (!information_request)
return r;
r = sd_dhcp6_client_set_information_request(link->dhcp6_client,
false);
if (r < 0) {
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
log_link_warning(link, "Could not unset DHCPv6 Information request: %s",
strerror(-r));
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_start(link->dhcp6_client);
if (r < 0) {
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
log_link_warning(link, "Could not restart DHCPv6 after enabling Information request: %s",
strerror(-r));
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
return r;
}
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
r = sd_dhcp6_client_new(&link->dhcp6_client);
if (r < 0)
return r;
r = sd_dhcp6_client_attach_event(link->dhcp6_client, NULL, 0);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_set_mac(link->dhcp6_client,
(const uint8_t *) &link->mac,
sizeof (link->mac), ARPHRD_ETHER);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_set_index(link->dhcp6_client, link->ifindex);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
r = sd_dhcp6_client_set_callback(link->dhcp6_client, dhcp6_handler,
link);
if (r < 0) {
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
if (event == ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER) {
r = sd_dhcp6_client_set_information_request(link->dhcp6_client,
true);
if (r < 0) {
link->dhcp6_client =
sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
}
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
r = sd_dhcp6_client_start(link->dhcp6_client);
if (r < 0)
link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
return r;
}
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
static int dhcp6_prefix_expired(Link *link) {
int r;
sd_dhcp6_lease *lease;
struct in6_addr *expired_prefix, ip6_addr;
uint8_t expired_prefixlen;
uint32_t lifetime_preferred, lifetime_valid;
r = sd_icmp6_ra_get_expired_prefix(link->icmp6_router_discovery,
&expired_prefix, &expired_prefixlen);
if (r < 0)
return r;
r = sd_dhcp6_client_get_lease(link->dhcp6_client, &lease);
if (r < 0)
return r;
core,network: major per-object logging rework This changes log_unit_info() (and friends) to take a real Unit* object insted of just a unit name as parameter. The call will now prefix all logged messages with the unit name, thus allowing the unit name to be dropped from the various passed romat strings, simplifying invocations drastically, and unifying log output across messages. Also, UNIT= vs. USER_UNIT= is now derived from the Manager object attached to the Unit object, instead of getpid(). This has the benefit of correcting the field for --test runs. Also contains a couple of other logging improvements: - Drops a couple of strerror() invocations in favour of using %m. - Not only .mount units now warn if a symlinks exist for the mount point already, .automount units do that too, now. - A few invocations of log_struct() that didn't actually pass any additional structured data have been replaced by simpler invocations of log_unit_info() and friends. - For structured data a new LOG_UNIT_MESSAGE() macro has been added, that works like LOG_MESSAGE() but prefixes the message with the unit name. Similar, there's now LOG_LINK_MESSAGE() and LOG_NETDEV_MESSAGE(). - For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(), LOG_NETDEV_INTERFACE() macros have been added that generate the necessary per object fields. The old log_unit_struct() call has been removed in favour of these new macros used in raw log_struct() invocations. In addition to removing one more function call this allows generated structured log messages that contain two object fields, as necessary for example for network interfaces that are joined into another network interface, and whose messages shall be indexed by both. - The LOG_ERRNO() macro has been removed, in favour of log_struct_errno(). The latter has the benefit of ensuring that %m in format strings is properly resolved to the specified error number. - A number of logging messages have been converted to use log_unit_info() instead of log_info() - The client code in sysv-generator no longer #includes core code from src/core/. - log_unit_full_errno() has been removed, log_unit_full() instead takes an errno now, too. - log_unit_info(), log_link_info(), log_netdev_info() and friends, now avoid double evaluation of their parameters
2015-05-11 20:38:21 +02:00
log_link_info(link, "IPv6 prefix "SD_ICMP6_ADDRESS_FORMAT_STR"/%d expired",
SD_ICMP6_ADDRESS_FORMAT_VAL(*expired_prefix),
expired_prefixlen);
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
sd_dhcp6_lease_reset_address_iter(lease);
while (sd_dhcp6_lease_get_address(lease, &ip6_addr,
&lifetime_preferred,
&lifetime_valid) >= 0) {
r = sd_icmp6_prefix_match(expired_prefix, expired_prefixlen,
&ip6_addr);
if (r < 0)
continue;
core,network: major per-object logging rework This changes log_unit_info() (and friends) to take a real Unit* object insted of just a unit name as parameter. The call will now prefix all logged messages with the unit name, thus allowing the unit name to be dropped from the various passed romat strings, simplifying invocations drastically, and unifying log output across messages. Also, UNIT= vs. USER_UNIT= is now derived from the Manager object attached to the Unit object, instead of getpid(). This has the benefit of correcting the field for --test runs. Also contains a couple of other logging improvements: - Drops a couple of strerror() invocations in favour of using %m. - Not only .mount units now warn if a symlinks exist for the mount point already, .automount units do that too, now. - A few invocations of log_struct() that didn't actually pass any additional structured data have been replaced by simpler invocations of log_unit_info() and friends. - For structured data a new LOG_UNIT_MESSAGE() macro has been added, that works like LOG_MESSAGE() but prefixes the message with the unit name. Similar, there's now LOG_LINK_MESSAGE() and LOG_NETDEV_MESSAGE(). - For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(), LOG_NETDEV_INTERFACE() macros have been added that generate the necessary per object fields. The old log_unit_struct() call has been removed in favour of these new macros used in raw log_struct() invocations. In addition to removing one more function call this allows generated structured log messages that contain two object fields, as necessary for example for network interfaces that are joined into another network interface, and whose messages shall be indexed by both. - The LOG_ERRNO() macro has been removed, in favour of log_struct_errno(). The latter has the benefit of ensuring that %m in format strings is properly resolved to the specified error number. - A number of logging messages have been converted to use log_unit_info() instead of log_info() - The client code in sysv-generator no longer #includes core code from src/core/. - log_unit_full_errno() has been removed, log_unit_full() instead takes an errno now, too. - log_unit_info(), log_link_info(), log_netdev_info() and friends, now avoid double evaluation of their parameters
2015-05-11 20:38:21 +02:00
log_link_info(link, "IPv6 prefix length updated "SD_ICMP6_ADDRESS_FORMAT_STR"/%d", SD_ICMP6_ADDRESS_FORMAT_VAL(ip6_addr), 128);
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
core,network: major per-object logging rework This changes log_unit_info() (and friends) to take a real Unit* object insted of just a unit name as parameter. The call will now prefix all logged messages with the unit name, thus allowing the unit name to be dropped from the various passed romat strings, simplifying invocations drastically, and unifying log output across messages. Also, UNIT= vs. USER_UNIT= is now derived from the Manager object attached to the Unit object, instead of getpid(). This has the benefit of correcting the field for --test runs. Also contains a couple of other logging improvements: - Drops a couple of strerror() invocations in favour of using %m. - Not only .mount units now warn if a symlinks exist for the mount point already, .automount units do that too, now. - A few invocations of log_struct() that didn't actually pass any additional structured data have been replaced by simpler invocations of log_unit_info() and friends. - For structured data a new LOG_UNIT_MESSAGE() macro has been added, that works like LOG_MESSAGE() but prefixes the message with the unit name. Similar, there's now LOG_LINK_MESSAGE() and LOG_NETDEV_MESSAGE(). - For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(), LOG_NETDEV_INTERFACE() macros have been added that generate the necessary per object fields. The old log_unit_struct() call has been removed in favour of these new macros used in raw log_struct() invocations. In addition to removing one more function call this allows generated structured log messages that contain two object fields, as necessary for example for network interfaces that are joined into another network interface, and whose messages shall be indexed by both. - The LOG_ERRNO() macro has been removed, in favour of log_struct_errno(). The latter has the benefit of ensuring that %m in format strings is properly resolved to the specified error number. - A number of logging messages have been converted to use log_unit_info() instead of log_info() - The client code in sysv-generator no longer #includes core code from src/core/. - log_unit_full_errno() has been removed, log_unit_full() instead takes an errno now, too. - log_unit_info(), log_link_info(), log_netdev_info() and friends, now avoid double evaluation of their parameters
2015-05-11 20:38:21 +02:00
dhcp6_address_update(link, &ip6_addr, 128, lifetime_preferred, lifetime_valid);
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
}
return 0;
}
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
static void icmp6_router_handler(sd_icmp6_nd *nd, int event, void *userdata) {
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 ICMP6_EVENT_ROUTER_ADVERTISMENT_NONE:
return;
case ICMP6_EVENT_ROUTER_ADVERTISMENT_TIMEOUT:
networkd-dhcp6: Support ICMPv6 Other information When ICMPv6 Other information is received, enable Information request in DHCPv6. If the DHCPv6 client already exists, only update the client if there is a transition from Other to Managed state.
2014-12-10 15:17:35 +01:00
case ICMP6_EVENT_ROUTER_ADVERTISMENT_OTHER:
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
case ICMP6_EVENT_ROUTER_ADVERTISMENT_MANAGED:
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
dhcp6_configure(link, event);
break;
network: Implement fallback DHCPv6 prefix handling for older kernels When setting IPv6 addresses acquired by DHCPv6, systemd-networkd sets the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. As the flag and the attribute are present starting with Linux 3.14, older kernels will need systemd-network to manage prefix route expiry. By default, DHCPv6 addresses are first assigned setting the IFA_F_NOPREFIXROUTE flag in the IFA_FLAGS netlink attribute. Should the address assignment fail, the same assignment is tried without the IFA_FLAGS attribute. Should also the second attempt fail, an error is printed and address assignment ends with failure. As successful use of the IFA_FLAGS netlink attribute is recorded in the Link structure, the DHCPv6 code will know if the kernel or systemd-network fallback code handles expiring prefixes. The prefix expiration and IPv6 address updating fallback code is resurrected from the parts deleted with commit 47d45d3cde45d6545367570264e4e3636bc9e345. This patch can be removed once the minimum kernel requirements are greater than or equal to 3.14.
2015-04-10 13:03:18 +02:00
case ICMP6_EVENT_ROUTER_ADVERTISMENT_PREFIX_EXPIRED:
if (!link->rtnl_extended_attrs)
dhcp6_prefix_expired(link);
break;
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
default:
if (event < 0)
log_link_warning(link, "ICMPv6 error: %s",
strerror(-event));
else
log_link_warning(link, "ICMPv6 unknown event: %d",
event);
networkd-dhcp6: Assign DHCPv6 addresses and prefix lengths Once IPv6 addresses have been acquired, assign these to the interface with the prefix lengths taken from the ICMPv6 Router Advertisement handling code. The preferred and valid IPv6 address lifetimes are handed to the kernel which will clean up them if not renewed in time. When a prefix announced via Router Advertisements expires, find all addresses that match that prefix and update the address to have a prefix length of 128 causing the prefix to be off-link.
2015-01-20 18:36:04 +01:00
break;
networkd-dhcp6: Move ICMPv6 and DHCPv6 configuration to new file Handle all aspects of ICMPv6 and DHCPv6 in a file of its own as is done with DHCPv4 and IPv4LL.
2014-12-10 15:17:34 +01:00
}
}
int icmp6_configure(Link *link) {
int r;
assert_return(link, -EINVAL);
r = sd_icmp6_nd_new(&link->icmp6_router_discovery);
if (r < 0)
return r;
r = sd_icmp6_nd_attach_event(link->icmp6_router_discovery, NULL, 0);
if (r < 0)
return r;
r = sd_icmp6_nd_set_mac(link->icmp6_router_discovery, &link->mac);
if (r < 0)
return r;
r = sd_icmp6_nd_set_index(link->icmp6_router_discovery, link->ifindex);
if (r < 0)
return r;
r = sd_icmp6_nd_set_callback(link->icmp6_router_discovery,
icmp6_router_handler, link);
return r;
}
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