networkd: Allow specifying RouteTable for DHCP

5 files changed, 46 insertions, 0 deletions

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index eb7d441842..961ff64ff0 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -917,6 +917,15 @@
             DHCP server.</para>
           </listitem>
         </varlistentry>
+
+        <varlistentry>
+          <term><varname>RouteTable=<replaceable>num</replaceable></varname></term>
+          <listitem>
+            <para>The table identifier for dhcp routes (a number between 1 and 4294967295, or 0 to unset).
+            The table can be retrieved using <command>ip route show table <replaceable>num</replaceable></command>.
+            </para>
+          </listitem>
+        </varlistentry>
       </variablelist>
     </refsect1>
 
diff --git a/src/network/networkd-dhcp4.c b/src/network/networkd-dhcp4.c
index 12fb8e3fce..76d3d132ea 100644
--- a/src/network/networkd-dhcp4.c
+++ b/src/network/networkd-dhcp4.c
@@ -95,6 +95,7 @@ static int link_set_dhcp_routes(Link *link) {
                 route_gw->scope = RT_SCOPE_LINK;
                 route_gw->protocol = RTPROT_DHCP;
                 route_gw->priority = link->network->dhcp_route_metric;
+                route_gw->table = link->network->dhcp_route_table;
 
                 r = route_configure(route_gw, link, dhcp4_route_handler);
                 if (r < 0)
@@ -106,6 +107,7 @@ static int link_set_dhcp_routes(Link *link) {
                 route->gw.in = gateway;
                 route->prefsrc.in = address;
                 route->priority = link->network->dhcp_route_metric;
+                route->table = link->network->dhcp_route_table;
 
                 r = route_configure(route, link, dhcp4_route_handler);
                 if (r < 0) {
@@ -136,6 +138,7 @@ static int link_set_dhcp_routes(Link *link) {
                 assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
                 assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
                 route->priority = link->network->dhcp_route_metric;
+                route->table = link->network->dhcp_route_table;
 
                 r = route_configure(route, link, dhcp4_route_handler);
                 if (r < 0)
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index b96f0b7210..65ea20c4ca 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -92,6 +92,7 @@ DHCP.VendorClassIdentifier,             config_parse_string,
 DHCP.DUIDType,                          config_parse_duid_type,                         0,                             offsetof(Network, duid.type)
 DHCP.DUIDRawData,                       config_parse_duid_rawdata,                      0,                             offsetof(Network, duid)
 DHCP.RouteMetric,                       config_parse_unsigned,                          0,                             offsetof(Network, dhcp_route_metric)
+DHCP.RouteTable,                        config_parse_dhcp_route_table,                  0,                             offsetof(Network, dhcp_route_table)
 DHCP.UseTimezone,                       config_parse_bool,                              0,                             offsetof(Network, dhcp_use_timezone)
 DHCP.IAID,                              config_parse_iaid,                              0,                             offsetof(Network, iaid)
 IPv6AcceptRA.UseDNS,                    config_parse_bool,                              0,                             offsetof(Network, ipv6_accept_ra_use_dns)
diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index 313abca762..c7dc785b24 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -111,6 +111,7 @@ static int network_load_one(Manager *manager, const char *filename) {
         network->dhcp_send_hostname = true;
         network->dhcp_route_metric = DHCP_ROUTE_METRIC;
         network->dhcp_client_identifier = DHCP_CLIENT_ID_DUID;
+        network->dhcp_route_table = RT_TABLE_MAIN;
 
         network->dhcp_server_emit_dns = true;
         network->dhcp_server_emit_ntp = true;
@@ -1033,6 +1034,36 @@ int config_parse_dnssec_negative_trust_anchors(
         return 0;
 }
 
+int config_parse_dhcp_route_table(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) {
+        uint32_t rt;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = safe_atou32(rvalue, &rt);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Unable to read RouteTable, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        *((uint32_t *)data) = rt;
+
+        return 0;
+}
+
 DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_use_domains, dhcp_use_domains, DHCPUseDomains, "Failed to parse DHCP use domains setting");
 
 static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
diff --git a/src/network/networkd-network.h b/src/network/networkd-network.h
index 5460eb4d1c..a34dbf5c7b 100644
--- a/src/network/networkd-network.h
+++ b/src/network/networkd-network.h
@@ -123,6 +123,7 @@ struct Network {
         bool dhcp_use_routes;
         bool dhcp_use_timezone;
         unsigned dhcp_route_metric;
+        uint32_t dhcp_route_table;
 
         /* DHCP Server Support */
         bool dhcp_server;
@@ -228,6 +229,7 @@ int config_parse_dhcp_server_ntp(const char *unit, const char *filename, unsigne
 int config_parse_dnssec_negative_trust_anchors(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);
 int config_parse_dhcp_use_domains(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);
 int config_parse_lldp_mode(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);
+int config_parse_dhcp_route_table(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);
 
 /* Legacy IPv4LL support */
 int config_parse_ipv4ll(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);