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network: rename settings about DHCPv6 Prefix Delegation

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Closes #16602.
This commit is contained in:
Yu Watanabe 2020-07-29 05:50:04 +09:00
parent 61c0ef4ff3
commit 99e015e28c
9 changed files with 128 additions and 108 deletions
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71
man/systemd.network.xml
View File

@ -809,16 +809,6 @@
<literal>false</literal>. See the [IPv6PrefixDelegation] and the [IPv6Prefix] sections for more
configuration options.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>IPv6PDSubnetId=</varname></term>
<listitem><para>Configure a specific subnet ID on the interface from a (previously) received prefix delegation.
You can either set "auto" (the default) or a specific subnet ID
(as defined in <ulink url="https://tools.ietf.org/html/rfc4291#section-2.5.4">RFC 4291</ulink>, section 2.5.4),
in which case the allowed value is hexadecimal, from 0 to 0x7fffffffffffffff inclusive.
This option is only effective when used together with <varname>IPv6PrefixDelegation=</varname>
and the corresponding configuration on the upstream interface.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>IPv6MTUBytes=</varname></term>
<listitem><para>Configures IPv6 maximum transmission unit (MTU).
@ -1893,25 +1883,6 @@
</listitem>
</varlistentry>
<varlistentry>
<term><varname>AssignAcquiredDelegatedPrefixAddress=</varname></term>
<listitem>
<para>Takes a boolean. Specifies whether to add an address from the delegated prefixes which are received
from the WAN interface by the <varname>IPv6PrefixDelegation=</varname>. When true (on LAN interfce), the EUI-64
algorithm will be used to form an interface identifier from the delegated prefixes. Defaults to true.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>AssignAcquiredDelegatedPrefixToken=</varname></term>
<listitem>
<para>Specifies an optional address generation mode for <varname>AssignAcquiredDelegatedPrefixAddress=</varname>.
Takes an IPv6 address. When set, the lower bits of the supplied address are combined with the upper bits of a
delegatad prefix received from the WAN interface by the <varname>IPv6PrefixDelegation=</varname> prefixes to
form a complete address.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>PrefixDelegationHint=</varname></term>
<listitem>
@ -1966,6 +1937,48 @@
</variablelist>
</refsect1>
<refsect1>
<title>[DHCPv6PrefixDelegation] Section Options</title>
<para>The [DHCPv6PrefixDelegation] section configures delegated prefix assigned by DHCPv6 server.
The settings in this section are used only when <varname>IPv6PrefixDelegation=</varname> setting is
enabled, or set to <literal>dhcp6</literal>.</para>
<variablelist class='network-directives'>
<varlistentry>
<term><varname>SubnetId=</varname></term>
<listitem>
<para>Configure a specific subnet ID on the interface from a (previously) received prefix
delegation. You can either set "auto" (the default) or a specific subnet ID (as defined in
<ulink url="https://tools.ietf.org/html/rfc4291#section-2.5.4">RFC 4291</ulink>, section
2.5.4), in which case the allowed value is hexadecimal, from 0 to 0x7fffffffffffffff
inclusive. This option is only effective when used together with
<varname>IPv6PrefixDelegation=</varname> and the corresponding configuration on the upstream
interface.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Assign=</varname></term>
<listitem>
<para>Takes a boolean. Specifies whether to add an address from the delegated prefixes which
are received from the WAN interface by the <varname>IPv6PrefixDelegation=</varname>. When
true (on LAN interfce), the EUI-64 algorithm will be used to form an interface identifier
from the delegated prefixes. Defaults to true.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Token=</varname></term>
<listitem>
<para>Specifies an optional address generation mode for <varname>Assign=</varname>. Takes an
IPv6 address. When set, the lower bits of the supplied address are combined with the upper
bits of a delegatad prefix received from the WAN interface by the
<varname>IPv6PrefixDelegation=</varname> prefixes to form a complete address.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>[IPv6AcceptRA] Section Options</title>
<para>The [IPv6AcceptRA] section configures the IPv6 Router Advertisement (RA) client, if it is enabled

93
src/network/networkd-dhcp6.c
View File

@ -367,7 +367,7 @@ static int dhcp6_set_pd_address(Link *link,
assert(link->network);
assert(prefix);
if (!link->network->dhcp6_pd_assign_prefix)
if (!link->network->dhcp6_pd_assign)
return 0;
r = address_new(&address);
@ -376,8 +376,8 @@ static int dhcp6_set_pd_address(Link *link,
address->in_addr = *prefix;
if (!in_addr_is_null(AF_INET6, &link->network->dhcp6_delegation_prefix_token))
memcpy(address->in_addr.in6.s6_addr + 8, link->network->dhcp6_delegation_prefix_token.in6.s6_addr + 8, 8);
if (!in_addr_is_null(AF_INET6, &link->network->dhcp6_pd_token))
memcpy(address->in_addr.in6.s6_addr + 8, link->network->dhcp6_pd_token.in6.s6_addr + 8, 8);
else {
r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
if (r < 0)
@ -437,7 +437,7 @@ static bool link_has_preferred_subnet_id(Link *link) {
if (!link->network)
return false;
return link->network->router_prefix_subnet_id >= 0;
return link->network->dhcp6_pd_subnet_id >= 0;
}
static int dhcp6_get_preferred_delegated_prefix(
@ -461,7 +461,7 @@ static int dhcp6_get_preferred_delegated_prefix(
prefix = *masked_pd_prefix;
if (link_has_preferred_subnet_id(link)) {
uint64_t subnet_id = link->network->router_prefix_subnet_id;
uint64_t subnet_id = link->network->dhcp6_pd_subnet_id;
/* If the link has a preference for a particular subnet id try to allocate that */
if (subnet_id >= n_prefixes)
@ -1556,7 +1556,18 @@ int config_parse_dhcp6_mud_url(
return free_and_replace(network->dhcp6_mudurl, unescaped);
}
int config_parse_dhcp6_delegated_prefix_token(
DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp6_client_start_mode, dhcp6_client_start_mode, DHCP6ClientStartMode,
"Failed to parse WithoutRA= setting");
static const char* const dhcp6_client_start_mode_table[_DHCP6_CLIENT_START_MODE_MAX] = {
[DHCP6_CLIENT_START_MODE_NO] = "no",
[DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST] = "information-request",
[DHCP6_CLIENT_START_MODE_SOLICIT] = "solicit",
};
DEFINE_STRING_TABLE_LOOKUP(dhcp6_client_start_mode, DHCP6ClientStartMode);
int config_parse_dhcp6_pd_subnet_id(
const char *unit,
const char *filename,
unsigned line,
@ -1568,7 +1579,52 @@ int config_parse_dhcp6_delegated_prefix_token(
void *data,
void *userdata) {
Network *network = data;
int64_t *p = data;
uint64_t t;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if (isempty(rvalue) || streq(rvalue, "auto")) {
*p = -1;
return 0;
}
r = safe_atoux64(rvalue, &t);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse %s=, ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
if (t > INT64_MAX) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid subnet id '%s', ignoring assignment.",
rvalue);
return 0;
}
*p = (int64_t) t;
return 0;
}
int config_parse_dhcp6_pd_token(
const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
union in_addr_union *addr = data, tmp;
int r;
assert(filename);
@ -1577,33 +1633,24 @@ int config_parse_dhcp6_delegated_prefix_token(
assert(data);
if (isempty(rvalue)) {
network->dhcp6_delegation_prefix_token = IN_ADDR_NULL;
*addr = IN_ADDR_NULL;
return 0;
}
r = in_addr_from_string(AF_INET6, rvalue, &network->dhcp6_delegation_prefix_token);
r = in_addr_from_string(AF_INET6, rvalue, &tmp);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse DHCPv6 %s, ignoring: %s", lvalue, rvalue);
"Failed to parse DHCPv6 Prefix Delegation token, ignoring: %s", rvalue);
return 0;
}
if (in_addr_is_null(AF_INET6, &network->dhcp6_delegation_prefix_token)) {
if (in_addr_is_null(AF_INET6, &tmp)) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"DHCPv6 %s cannot be the ANY address, ignoring: %s", lvalue, rvalue);
"DHCPv6 Prefix Delegation token cannot be the ANY address, ignoring: %s", rvalue);
return 0;
}
*addr = tmp;
return 0;
}
DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp6_client_start_mode, dhcp6_client_start_mode, DHCP6ClientStartMode,
"Failed to parse WithoutRA= setting");
static const char* const dhcp6_client_start_mode_table[_DHCP6_CLIENT_START_MODE_MAX] = {
[DHCP6_CLIENT_START_MODE_NO] = "no",
[DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST] = "information-request",
[DHCP6_CLIENT_START_MODE_SOLICIT] = "solicit",
};
DEFINE_STRING_TABLE_LOOKUP(dhcp6_client_start_mode, DHCP6ClientStartMode);

3
src/network/networkd-dhcp6.h
View File

@ -34,8 +34,9 @@ int dhcp6_request_prefix_delegation(Link *link);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp6_pd_hint);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp6_mud_url);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp6_delegated_prefix_token);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp6_client_start_mode);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp6_pd_subnet_id);
CONFIG_PARSER_PROTOTYPE(config_parse_dhcp6_pd_token);
const char* dhcp6_client_start_mode_to_string(DHCP6ClientStartMode i) _const_;
DHCP6ClientStartMode dhcp6_client_start_mode_from_string(const char *s) _pure_;

6
src/network/networkd-network-gperf.gperf
View File

@ -213,8 +213,6 @@ DHCPv6.UserClass, config_parse_dhcp_user_class,
DHCPv6.VendorClass, config_parse_dhcp_vendor_class, 0, offsetof(Network, dhcp6_vendor_class)
DHCPv6.SendVendorOption, config_parse_dhcp_send_option, AF_INET6, offsetof(Network, dhcp6_client_send_vendor_options)
DHCPv6.ForceDHCPv6PDOtherInformation, config_parse_bool, 0, offsetof(Network, dhcp6_force_pd_other_information)
DHCPv6.AssignAcquiredDelegatedPrefixAddress, config_parse_bool, 0, offsetof(Network, dhcp6_pd_assign_prefix)
DHCPv6.AssignAcquiredDelegatedPrefixToken, config_parse_dhcp6_delegated_prefix_token, 0, 0
DHCPv6.PrefixDelegationHint, config_parse_dhcp6_pd_hint, 0, 0
DHCPv6.WithoutRA, config_parse_dhcp6_client_start_mode, 0, offsetof(Network, dhcp6_without_ra)
DHCPv6.SendOption, config_parse_dhcp_send_option, AF_INET6, offsetof(Network, dhcp6_client_send_options)
@ -271,7 +269,9 @@ BridgeVLAN.PVID, config_parse_brvlan_pvid,
BridgeVLAN.VLAN, config_parse_brvlan_vlan, 0, 0
BridgeVLAN.EgressUntagged, config_parse_brvlan_untagged, 0, 0
Network.IPv6PrefixDelegation, config_parse_router_prefix_delegation, 0, offsetof(Network, router_prefix_delegation)
Network.IPv6PDSubnetId, config_parse_router_prefix_subnet_id, 0, 0
DHCPv6PrefixDelegation.SubnetId, config_parse_dhcp6_pd_subnet_id, 0, offsetof(Network, dhcp6_pd_subnet_id)
DHCPv6PrefixDelegation.Assign, config_parse_bool, 0, offsetof(Network, dhcp6_pd_assign)
DHCPv6PrefixDelegation.Token, config_parse_dhcp6_pd_token, 0, offsetof(Network, dhcp6_pd_token)
IPv6PrefixDelegation.RouterLifetimeSec, config_parse_sec, 0, offsetof(Network, router_lifetime_usec)
IPv6PrefixDelegation.Managed, config_parse_bool, 0, offsetof(Network, router_managed)
IPv6PrefixDelegation.OtherInformation, config_parse_bool, 0, offsetof(Network, router_other_information)

4
src/network/networkd-network.c
View File

@ -420,7 +420,8 @@ int network_load_one(Manager *manager, OrderedHashmap **networks, const char *fi
.dhcp6_use_ntp = true,
.dhcp6_use_dns = true,
.dhcp6_pd_assign_prefix = true,
.dhcp6_pd_subnet_id = -1,
.dhcp6_pd_assign = true,
.dhcp_server_emit[SD_DHCP_LEASE_DNS].emit = true,
.dhcp_server_emit[SD_DHCP_LEASE_NTP].emit = true,
@ -429,7 +430,6 @@ int network_load_one(Manager *manager, OrderedHashmap **networks, const char *fi
.dhcp_server_emit_router = true,
.dhcp_server_emit_timezone = true,
.router_prefix_subnet_id = -1,
.router_emit_dns = true,
.router_emit_domains = true,

8
src/network/networkd-network.h
View File

@ -184,7 +184,6 @@ struct Network {
/* IPv6 prefix delegation support */
RADVPrefixDelegation router_prefix_delegation;
int64_t router_prefix_subnet_id;
usec_t router_lifetime_usec;
uint8_t router_preference;
bool router_managed;
@ -198,8 +197,11 @@ struct Network {
bool dhcp6_force_pd_other_information; /* Start DHCPv6 PD also when 'O'
RA flag is set, see RFC 7084,
WPD-4 */
bool dhcp6_pd_assign_prefix;
union in_addr_union dhcp6_delegation_prefix_token;
/* DHCPv6 Prefix Delegation support */
int64_t dhcp6_pd_subnet_id;
bool dhcp6_pd_assign;
union in_addr_union dhcp6_pd_token;
/* Bridge Support */
int use_bpdu;

43
src/network/networkd-radv.c
View File

@ -866,46 +866,3 @@ int config_parse_router_preference(const char *unit,
return 0;
}
int config_parse_router_prefix_subnet_id(const char *unit,
const char *filename,
unsigned line,
const char *section,
unsigned section_line,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
Network *network = userdata;
uint64_t t;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
if (isempty(rvalue) || streq(rvalue, "auto")) {
network->router_prefix_subnet_id = -1;
return 0;
}
r = safe_atoux64(rvalue, &t);
if (r < 0) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Failed to parse %s=, ignoring assignment: %s",
lvalue, rvalue);
return 0;
}
if (t > INT64_MAX) {
log_syntax(unit, LOG_WARNING, filename, line, r,
"Invalid subnet id '%s', ignoring assignment.",
rvalue);
return 0;
}
network->router_prefix_subnet_id = (int64_t)t;
return 0;
}

1
src/network/networkd-radv.h
View File

@ -60,7 +60,6 @@ RADVPrefixDelegation radv_prefix_delegation_from_string(const char *s) _pure_;
CONFIG_PARSER_PROTOTYPE(config_parse_router_prefix_delegation);
CONFIG_PARSER_PROTOTYPE(config_parse_router_preference);
CONFIG_PARSER_PROTOTYPE(config_parse_router_prefix_subnet_id);
CONFIG_PARSER_PROTOTYPE(config_parse_prefix);
CONFIG_PARSER_PROTOTYPE(config_parse_prefix_flags);
CONFIG_PARSER_PROTOTYPE(config_parse_prefix_lifetime);

7
test/fuzz/fuzz-network-parser/directives.network
View File

@ -130,10 +130,12 @@ SendOption=
RequestOptions=
UserClass=
VendorClass=
AssignAcquiredDelegatedPrefixAddress=
AssignAcquiredDelegatedPrefixToken=
SendVendorOption=
RouteMetric=
[DHCPv6PrefixDelegation]
SubnetId=
Assign=
Token=
[Route]
Destination=
Protocol=
@ -203,7 +205,6 @@ NTP=
DHCP=
Domains=
IPv6PrefixDelegation=
IPv6PDSubnetId=
VLAN=
DHCPServer=
BindCarrier=