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network: ndisc: introduce UseGateway= and UseRoutePrefix= settings

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Closes #21263.
This commit is contained in:
Yu Watanabe 2021-11-09 06:44:45 +09:00
parent ad0b2df635
commit 610c0db126
6 changed files with 50 additions and 13 deletions
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16
man/systemd.network.xml
View file

@ -2295,6 +2295,22 @@ Token=prefixstable:2002:da8:1::</programlisting></para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>UseGateway=</varname></term>
<listitem>
<para>When true (the default), the router address will be configured as the default gateway.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>UseRoutePrefix=</varname></term>
<listitem>
<para>When true (the default), the routes corresponding to the route prefixes received in
the Router Advertisement will be configured.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>UseAutonomousPrefix=</varname></term>
<listitem>

39
src/network/networkd-ndisc.c
View file

@ -290,7 +290,6 @@ static int ndisc_request_address(Address *in, Link *link, sd_ndisc_router *rt) {
}
static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
_cleanup_(route_freep) Route *route = NULL;
usec_t lifetime_usec, timestamp_usec;
struct in6_addr gateway;
uint16_t lifetime_sec;
@ -299,8 +298,13 @@ static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
int r;
assert(link);
assert(link->network);
assert(rt);
if (!link->network->ipv6_accept_ra_use_gateway &&
hashmap_isempty(link->network->routes_by_section))
return 0;
r = sd_ndisc_router_get_lifetime(rt, &lifetime_sec);
if (r < 0)
return log_link_error_errno(link, r, "Failed to get gateway lifetime from RA: %m");
@ -339,23 +343,29 @@ static int ndisc_router_process_default(Link *link, sd_ndisc_router *rt) {
return log_link_error_errno(link, r, "Failed to get default router MTU from RA: %m");
}
r = route_new(&route);
if (r < 0)
return log_oom();
if (link->network->ipv6_accept_ra_use_gateway) {
_cleanup_(route_freep) Route *route = NULL;
route->family = AF_INET6;
route->pref = preference;
route->gw_family = AF_INET6;
route->gw.in6 = gateway;
route->lifetime_usec = lifetime_usec;
route->mtu = mtu;
r = route_new(&route);
if (r < 0)
return log_oom();
r = ndisc_request_route(TAKE_PTR(route), link, rt);
if (r < 0)
return log_link_error_errno(link, r, "Could not request default route: %m");
route->family = AF_INET6;
route->pref = preference;
route->gw_family = AF_INET6;
route->gw.in6 = gateway;
route->lifetime_usec = lifetime_usec;
route->mtu = mtu;
r = ndisc_request_route(TAKE_PTR(route), link, rt);
if (r < 0)
return log_link_error_errno(link, r, "Could not request default route: %m");
}
Route *route_gw;
HASHMAP_FOREACH(route_gw, link->network->routes_by_section) {
_cleanup_(route_freep) Route *route = NULL;
if (!route_gw->gateway_from_dhcp_or_ra)
continue;
@ -584,6 +594,9 @@ static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
assert(link);
if (!link->network->ipv6_accept_ra_use_route_prefix)
return 0;
r = sd_ndisc_router_route_get_lifetime(rt, &lifetime_sec);
if (r < 0)
return log_link_error_errno(link, r, "Failed to get route lifetime from RA: %m");

2
src/network/networkd-network-gperf.gperf
View file

@ -255,6 +255,8 @@ DHCPv6.IAID, config_parse_iaid,
DHCPv6.DUIDType, config_parse_duid_type, 0, offsetof(Network, dhcp6_duid)
DHCPv6.DUIDRawData, config_parse_duid_rawdata, 0, offsetof(Network, dhcp6_duid)
DHCPv6.RouteTable, config_parse_dhcp_or_ra_route_table, (RTPROT_DHCP<<16) | AF_INET6, 0
IPv6AcceptRA.UseGateway, config_parse_bool, 0, offsetof(Network, ipv6_accept_ra_use_gateway)
IPv6AcceptRA.UseRoutePrefix, config_parse_bool, 0, offsetof(Network, ipv6_accept_ra_use_route_prefix)
IPv6AcceptRA.UseAutonomousPrefix, config_parse_bool, 0, offsetof(Network, ipv6_accept_ra_use_autonomous_prefix)
IPv6AcceptRA.UseOnLinkPrefix, config_parse_bool, 0, offsetof(Network, ipv6_accept_ra_use_onlink_prefix)
IPv6AcceptRA.UseDNS, config_parse_bool, 0, offsetof(Network, ipv6_accept_ra_use_dns)

2
src/network/networkd-network.c
View file

@ -464,6 +464,8 @@ int network_load_one(Manager *manager, OrderedHashmap **networks, const char *fi
.ipv6_accept_ra = -1,
.ipv6_accept_ra_use_dns = true,
.ipv6_accept_ra_use_gateway = true,
.ipv6_accept_ra_use_route_prefix = true,
.ipv6_accept_ra_use_autonomous_prefix = true,
.ipv6_accept_ra_use_onlink_prefix = true,
.ipv6_accept_ra_use_mtu = true,

2
src/network/networkd-network.h
View file

@ -301,6 +301,8 @@ struct Network {
/* IPv6 accept RA */
int ipv6_accept_ra;
bool ipv6_accept_ra_use_dns;
bool ipv6_accept_ra_use_gateway;
bool ipv6_accept_ra_use_route_prefix;
bool ipv6_accept_ra_use_autonomous_prefix;
bool ipv6_accept_ra_use_onlink_prefix;
bool ipv6_accept_ra_use_mtu;

2
test/fuzz/fuzz-network-parser/directives.network
View file

@ -352,6 +352,8 @@ RouteTable=
RouteMetric=
UseDNS=
DHCPv6Client=
UseGateway=
UseRoutePrefix=
UseAutonomousPrefix=
UseOnLinkPrefix=
RouterAllowList=