network: introduce QuickAck= for [DHCPv4] and [IPv6AcceptRA]

Closes #25906.

5 files changed, 28 insertions, 2 deletions

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index daa2c2e167..69b94adbe7 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -1645,8 +1645,8 @@ allow my_server_t localnet_peer_t:peer recv;</programlisting>
       <varlistentry>
         <term><varname>QuickAck=</varname></term>
         <listitem>
-          <para>Takes a boolean. When true enables TCP quick ack mode for the route. When unset, the
-          kernel's default will be used.</para>
+          <para>Takes a boolean. When true, the TCP quick ACK mode for the route is enabled. When unset,
+          the kernel's default will be used.</para>
         </listitem>
       </varlistentry>
 
@@ -2047,6 +2047,14 @@ allow my_server_t localnet_peer_t:peer recv;</programlisting>
       </varlistentry>
 
       <varlistentry>
+        <term><varname>QuickAck=</varname></term>
+        <listitem>
+          <para>Takes a boolean. When true, the TCP quick ACK mode is enabled for the routes configured by
+          the acquired DHCPv4 lease. When unset, the kernel's default will be used.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
         <term><varname>UseGateway=</varname></term>
         <listitem>
           <para>When true, the gateway will be requested from the DHCP server and added to the routing
@@ -2547,6 +2555,14 @@ Token=prefixstable:2002:da8:1::</programlisting></para>
       </varlistentry>
 
       <varlistentry>
+        <term><varname>QuickAck=</varname></term>
+        <listitem>
+          <para>Takes a boolean. When true, the TCP quick ACK mode is enabled for the routes configured by
+          the received RAs. When unset, the kernel's default will be used.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
         <term><varname>UseMTU=</varname></term>
         <listitem>
           <para>Takes a boolean. When true, the MTU received in the Router Advertisement will be
diff --git a/src/network/networkd-dhcp4.c b/src/network/networkd-dhcp4.c
index 43850e1e95..1d5e2975a8 100644
--- a/src/network/networkd-dhcp4.c
+++ b/src/network/networkd-dhcp4.c
@@ -183,6 +183,7 @@ static int dhcp4_request_route(Route *in, Link *link) {
 
         assert(route);
         assert(link);
+        assert(link->network);
         assert(link->dhcp_lease);
 
         r = sd_dhcp_lease_get_server_identifier(link->dhcp_lease, &server);
@@ -200,6 +201,8 @@ static int dhcp4_request_route(Route *in, Link *link) {
                 route->table = link_get_dhcp4_route_table(link);
         if (route->mtu == 0)
                 route->mtu = link->network->dhcp_route_mtu;
+        if (route->quickack < 0)
+                route->quickack = link->network->dhcp_quickack;
 
         if (route_get(NULL, link, route, &existing) < 0) /* This is a new route. */
                 link->dhcp4_configured = false;
diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c
index c7ed5fcfe1..ed9bb18599 100644
--- a/src/network/networkd-ndisc.c
+++ b/src/network/networkd-ndisc.c
@@ -173,6 +173,7 @@ static int ndisc_request_route(Route *in, Link *link, sd_ndisc_router *rt) {
 
         assert(route);
         assert(link);
+        assert(link->network);
         assert(rt);
 
         r = sd_ndisc_router_get_address(rt, &router);
@@ -186,6 +187,8 @@ static int ndisc_request_route(Route *in, Link *link, sd_ndisc_router *rt) {
         ndisc_set_route_priority(link, route);
         if (!route->protocol_set)
                 route->protocol = RTPROT_RA;
+        if (route->quickack < 0)
+                route->quickack = link->network->ipv6_accept_ra_quickack;
 
         is_new = route_get(NULL, link, route, NULL) < 0;
 
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index c205e56c62..59d352b4d1 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -221,6 +221,7 @@ DHCPv4.UseHostname,                          config_parse_bool,
 DHCPv4.UseDomains,                           config_parse_dhcp_use_domains,                            AF_INET,                       0
 DHCPv4.UseRoutes,                            config_parse_bool,                                        0,                             offsetof(Network, dhcp_use_routes)
 DHCPv4.UseGateway,                           config_parse_tristate,                                    0,                             offsetof(Network, dhcp_use_gateway)
+DHCPv4.QuickAck,                             config_parse_bool,                                        0,                             offsetof(Network, dhcp_quickack)
 DHCPv4.RequestOptions,                       config_parse_dhcp_request_options,                        AF_INET,                       0
 DHCPv4.Anonymize,                            config_parse_bool,                                        0,                             offsetof(Network, dhcp_anonymize)
 DHCPv4.SendHostname,                         config_parse_bool,                                        0,                             offsetof(Network, dhcp_send_hostname)
@@ -279,6 +280,7 @@ IPv6AcceptRA.UseMTU,                         config_parse_bool,
 IPv6AcceptRA.DHCPv6Client,                   config_parse_ipv6_accept_ra_start_dhcp6_client,           0,                             offsetof(Network, ipv6_accept_ra_start_dhcp6_client)
 IPv6AcceptRA.RouteTable,                     config_parse_dhcp_or_ra_route_table,                      AF_INET6,                      0
 IPv6AcceptRA.RouteMetric,                    config_parse_ipv6_accept_ra_route_metric,                 0,                             0
+IPv6AcceptRA.QuickAck,                       config_parse_bool,                                        0,                             offsetof(Network, ipv6_accept_ra_quickack)
 IPv6AcceptRA.RouterAllowList,                config_parse_in_addr_prefixes,                            AF_INET6,                      offsetof(Network, ndisc_allow_listed_router)
 IPv6AcceptRA.RouterDenyList,                 config_parse_in_addr_prefixes,                            AF_INET6,                      offsetof(Network, ndisc_deny_listed_router)
 IPv6AcceptRA.PrefixAllowList,                config_parse_in_addr_prefixes,                            AF_INET6,                      offsetof(Network, ndisc_allow_listed_prefix)
diff --git a/src/network/networkd-network.h b/src/network/networkd-network.h
index fbeec6072e..986e067902 100644
--- a/src/network/networkd-network.h
+++ b/src/network/networkd-network.h
@@ -146,6 +146,7 @@ struct Network {
         bool dhcp_use_mtu;
         bool dhcp_use_routes;
         int dhcp_use_gateway;
+        bool dhcp_quickack;
         bool dhcp_use_timezone;
         bool dhcp_use_hostname;
         bool dhcp_use_6rd;
@@ -312,6 +313,7 @@ struct Network {
         bool ipv6_accept_ra_use_autonomous_prefix;
         bool ipv6_accept_ra_use_onlink_prefix;
         bool ipv6_accept_ra_use_mtu;
+        bool ipv6_accept_ra_quickack;
         bool active_slave;
         bool primary_slave;
         DHCPUseDomains ipv6_accept_ra_use_domains;