networkd: address add support to configure flags (#4201)
This patch enables to configure IFA_F_HOMEADDRESS IFA_F_NODAD IFA_F_MANAGETEMPADDR IFA_F_NOPREFIXROUTE IFA_F_MCAUTOJOIN
This commit is contained in:
Susant Sahani
Lennart Poettering
parent
3157b2d9d2
commit
e63be0847c
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@ -695,6 +695,57 @@
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which is then configured to use them explicitly.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>HomeAddress=</varname></term>
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<listitem>
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<para>Takes a boolean argument. Designates this address the "home address" as defined in
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<ulink url="https://tools.ietf.org/html/rfc6275">RFC 6275</ulink>.
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Supported only on IPv6. Defaults to false.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>DuplicateAddressDetection=</varname></term>
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<listitem>
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<para>Takes a boolean argument. Do not perform Duplicate Address Detection
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<ulink url="https://tools.ietf.org/html/rfc4862">RFC 4862</ulink> when adding this address.
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Supported only on IPv6. Defaults to false.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>ManageTemporaryAddress=</varname></term>
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<listitem>
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<para>Takes a boolean argument. If true the kernel manage temporary addresses created
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from this one as template on behalf of Privacy Extensions
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<ulink url="https://tools.ietf.org/html/rfc3041">RFC 3041</ulink>. For this to become
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active, the use_tempaddr sysctl setting has to be set to a value greater than zero.
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The given address needs to have a prefix length of 64. This flag allows to use privacy
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extensions in a manually configured network, just like if stateless auto-configuration
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was active. Defaults to false. </para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>PrefixRoute=</varname></term>
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<listitem>
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<para>Takes a boolean argument. When adding or modifying an IPv6 address, the userspace
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application needs a way to suppress adding a prefix route. This is for example relevant
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together with IFA_F_MANAGERTEMPADDR, where userspace creates autoconf generated addresses,
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but depending on on-link, no route for the prefix should be added. Defaults to false.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>AutoJoin=</varname></term>
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<listitem>
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<para>Takes a boolean argument. Joining multicast group on ethernet level via
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<command>ip maddr</command> command would not work if we have an Ethernet switch that does
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IGMP snooping since the switch would not replicate multicast packets on ports that did not
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have IGMP reports for the multicast addresses. Linux vxlan interfaces created via
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<command>ip link add vxlan</command> or networkd's netdev kind vxlan have the group option
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that enables then to do the required join. By extending ip address command with option
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<literal>autojoin</literal> we can get similar functionality for openvswitch (OVS) vxlan
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interfaces as well as other tunneling mechanisms that need to receive multicast traffic.
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Defaults to <literal>no</literal>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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@ -1052,6 +1052,10 @@ typedef int32_t key_serial_t;
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#define ETHERTYPE_LLDP 0x88cc
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#endif
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#ifndef IFA_F_MCAUTOJOIN
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#define IFA_F_MCAUTOJOIN 0x400
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#endif
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#endif
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#include "missing_syscall.h"
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@ -571,6 +571,21 @@ int address_configure(
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address->flags |= IFA_F_PERMANENT;
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if (address->home_address)
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address->flags |= IFA_F_HOMEADDRESS;
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if (address->duplicate_address_detection)
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address->flags |= IFA_F_NODAD;
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if (address->manage_temporary_address)
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address->flags |= IFA_F_MANAGETEMPADDR;
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if (address->prefix_route)
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address->flags |= IFA_F_NOPREFIXROUTE;
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if (address->autojoin)
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address->flags |= IFA_F_MCAUTOJOIN;
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r = sd_rtnl_message_addr_set_flags(req, (address->flags & 0xff));
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if (r < 0)
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return log_error_errno(r, "Could not set flags: %m");
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@ -856,6 +871,50 @@ int config_parse_lifetime(const char *unit,
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return 0;
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}
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int config_parse_address_flags(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = userdata;
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_cleanup_address_free_ Address *n = NULL;
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int r;
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assert(filename);
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assert(section);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = address_new_static(network, section_line, &n);
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if (r < 0)
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return r;
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r = parse_boolean(rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address flag, ignoring: %s", rvalue);
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return 0;
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}
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if (streq(lvalue, "HomeAddress"))
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n->home_address = r;
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else if (streq(lvalue, "DuplicateAddressDetection"))
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n->duplicate_address_detection = r;
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else if (streq(lvalue, "ManageTemporaryAddress"))
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n->manage_temporary_address = r;
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else if (streq(lvalue, "PrefixRoute"))
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n->prefix_route = r;
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else if (streq(lvalue, "AutoJoin"))
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n->autojoin = r;
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return 0;
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}
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bool address_is_ready(const Address *a) {
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assert(a);
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@ -53,6 +53,11 @@ struct Address {
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union in_addr_union in_addr_peer;
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bool ip_masquerade_done:1;
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bool duplicate_address_detection;
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bool manage_temporary_address;
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bool home_address;
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bool prefix_route;
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bool autojoin;
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LIST_FIELDS(Address, addresses);
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};
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@ -77,3 +82,4 @@ int config_parse_address(const char *unit, const char *filename, unsigned line,
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int config_parse_broadcast(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);
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int config_parse_label(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);
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int config_parse_lifetime(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);
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int config_parse_address_flags(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);
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@ -70,6 +70,11 @@ Address.Peer, config_parse_address,
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Address.Broadcast, config_parse_broadcast, 0, 0
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Address.Label, config_parse_label, 0, 0
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Address.PreferredLifetime, config_parse_lifetime, 0, 0
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Address.HomeAddress, config_parse_address_flags, 0, 0
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Address.DuplicateAddressDetection, config_parse_address_flags, 0, 0
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Address.ManageTemporaryAddress, config_parse_address_flags, 0, 0
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Address.PrefixRoute, config_parse_address_flags, 0, 0
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Address.AutoJoin, config_parse_address_flags, 0, 0
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Route.Gateway, config_parse_gateway, 0, 0
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Route.Destination, config_parse_destination, 0, 0
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Route.Source, config_parse_destination, 0, 0
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