Merge pull request #3132 from ssahani/route-table

networkd: add support to set route table

7 files changed, 107 insertions, 5 deletions

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 2a20748376..1ed7b67086 100644
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -706,6 +706,14 @@
             <citerefentry project='man-pages'><refentrytitle>inet_pton</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
           </listitem>
         </varlistentry>
+        <varlistentry>
+          <term><varname>Table=<replaceable>num</replaceable></varname></term>
+          <listitem>
+          <para>The table identifier for the route (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/libsystemd/sd-netlink/netlink-message.c b/src/libsystemd/sd-netlink/netlink-message.c
index f56798674c..86d8dee867 100644
--- a/src/libsystemd/sd-netlink/netlink-message.c
+++ b/src/libsystemd/sd-netlink/netlink-message.c
@@ -207,11 +207,11 @@ static int add_rtattr(sd_netlink_message *m, unsigned short type, const void *da
                  * and gives us too little data (so don't do that)
                  */
                 padding = mempcpy(RTA_DATA(rta), data, data_length);
-        else {
+
+        else
                 /* if no data was passed, make sure we still initialize the padding
                    note that we can have data_length > 0 (used by some containers) */
                 padding = RTA_DATA(rta);
-        }
 
         /* make sure also the padding at the end of the message is initialized */
         padding_length = (uint8_t*)m->hdr + message_length - (uint8_t*)padding;
@@ -343,7 +343,7 @@ int sd_netlink_message_append_data(sd_netlink_message *m, unsigned short type, c
         assert_return(m, -EINVAL);
         assert_return(!m->sealed, -EPERM);
 
-        r = add_rtattr(m, type, &data, len);
+        r = add_rtattr(m, type, data, len);
         if (r < 0)
                 return r;
 
diff --git a/src/libsystemd/sd-netlink/rtnl-message.c b/src/libsystemd/sd-netlink/rtnl-message.c
index f251536a89..09240c7b2a 100644
--- a/src/libsystemd/sd-netlink/rtnl-message.c
+++ b/src/libsystemd/sd-netlink/rtnl-message.c
@@ -111,6 +111,20 @@ int sd_rtnl_message_route_get_flags(sd_netlink_message *m, unsigned *flags) {
         return 0;
 }
 
+int sd_rtnl_message_route_set_table(sd_netlink_message *m, unsigned char table) {
+        struct rtmsg *rtm;
+
+        assert_return(m, -EINVAL);
+        assert_return(m->hdr, -EINVAL);
+        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
+
+        rtm = NLMSG_DATA(m->hdr);
+
+        rtm->rtm_table = table;
+
+        return 0;
+}
+
 int sd_rtnl_message_route_get_family(sd_netlink_message *m, int *family) {
         struct rtmsg *rtm;
 
@@ -126,6 +140,20 @@ int sd_rtnl_message_route_get_family(sd_netlink_message *m, int *family) {
         return 0;
 }
 
+int sd_rtnl_message_route_set_family(sd_netlink_message *m, int family) {
+        struct rtmsg *rtm;
+
+        assert_return(m, -EINVAL);
+        assert_return(m->hdr, -EINVAL);
+        assert_return(rtnl_message_type_is_route(m->hdr->nlmsg_type), -EINVAL);
+
+        rtm = NLMSG_DATA(m->hdr);
+
+        rtm->rtm_family = family;
+
+        return 0;
+}
+
 int sd_rtnl_message_route_get_protocol(sd_netlink_message *m, unsigned char *protocol) {
         struct rtmsg *rtm;
 
diff --git a/src/network/networkd-network-gperf.gperf b/src/network/networkd-network-gperf.gperf
index 654d6a0316..471e300fde 100644
--- a/src/network/networkd-network-gperf.gperf
+++ b/src/network/networkd-network-gperf.gperf
@@ -71,6 +71,7 @@ Route.Source,                           config_parse_destination,
 Route.Metric,                           config_parse_route_priority,                    0,                             0
 Route.Scope,                            config_parse_route_scope,                       0,                             0
 Route.PreferredSource,                  config_parse_preferred_src,                     0,                             0
+Route.Table,                            config_parse_route_table,                       0,                             0
 DHCP.ClientIdentifier,                  config_parse_dhcp_client_identifier,            0,                             offsetof(Network, dhcp_client_identifier)
 DHCP.UseDNS,                            config_parse_bool,                              0,                             offsetof(Network, dhcp_use_dns)
 DHCP.UseNTP,                            config_parse_bool,                              0,                             offsetof(Network, dhcp_use_ntp)
diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index bda2707e6d..01094b20bd 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -451,6 +451,10 @@ int route_configure(Route *route, Link *link,
                         r = sd_netlink_message_append_in6_addr(req, RTA_GATEWAY, &route->gw.in6);
                 if (r < 0)
                         return log_error_errno(r, "Could not append RTA_GATEWAY attribute: %m");
+
+                r = sd_rtnl_message_route_set_family(req, route->family);
+                if (r < 0)
+                        return log_error_errno(r, "Could not set route family: %m");
         }
 
         if (route->dst_prefixlen) {
@@ -494,7 +498,26 @@ int route_configure(Route *route, Link *link,
 
         r = sd_rtnl_message_route_set_flags(req, route->flags);
         if (r < 0)
-                return log_error_errno(r, "Colud not set flags: %m");
+                return log_error_errno(r, "Could not set flags: %m");
+
+        if (route->table != RT_TABLE_DEFAULT) {
+
+                if (route->table < 256) {
+                        r = sd_rtnl_message_route_set_table(req, route->table);
+                        if (r < 0)
+                                return log_error_errno(r, "Could not set route table: %m");
+                } else {
+
+                        r = sd_rtnl_message_route_set_table(req, RT_TABLE_UNSPEC);
+                        if (r < 0)
+                                return log_error_errno(r, "Could not set route table: %m");
+
+                        /* Table attribute to allow allow more than 256. */
+                        r = sd_netlink_message_append_data(req, RTA_TABLE, &route->table, sizeof(route->table));
+                        if (r < 0)
+                                return log_error_errno(r, "Could not append RTA_TABLE attribute: %m");
+                }
+        }
 
         r = sd_netlink_message_append_u32(req, RTA_PRIORITY, route->priority);
         if (r < 0)
@@ -777,3 +800,42 @@ int config_parse_route_scope(const char *unit,
 
         return 0;
 }
+
+int config_parse_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) {
+        _cleanup_route_free_ Route *n = NULL;
+        Network *network = userdata;
+        uint32_t k;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new_static(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = safe_atou32(rvalue, &k);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Could not parse route table number \"%s\", ignoring assignment: %m", rvalue);
+                return 0;
+        }
+
+        n->table = k;
+
+        n = NULL;
+
+        return 0;
+}
diff --git a/src/network/networkd-route.h b/src/network/networkd-route.h
index a4a4bf2653..3ddeea96b7 100644
--- a/src/network/networkd-route.h
+++ b/src/network/networkd-route.h
@@ -37,7 +37,7 @@ struct Route {
         unsigned char protocol;  /* RTPROT_* */
         unsigned char tos;
         uint32_t priority; /* note that ip(8) calls this 'metric' */
-        unsigned char table;
+        uint32_t table;
         unsigned char pref;
         unsigned flags;
 
@@ -74,3 +74,4 @@ int config_parse_preferred_src(const char *unit, const char *filename, unsigned
 int config_parse_destination(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_route_priority(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_route_scope(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_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);
diff --git a/src/systemd/sd-netlink.h b/src/systemd/sd-netlink.h
index af7a797567..3ae110c080 100644
--- a/src/systemd/sd-netlink.h
+++ b/src/systemd/sd-netlink.h
@@ -137,8 +137,10 @@ int sd_rtnl_message_route_set_dst_prefixlen(sd_netlink_message *m, unsigned char
 int sd_rtnl_message_route_set_src_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
 int sd_rtnl_message_route_set_scope(sd_netlink_message *m, unsigned char scope);
 int sd_rtnl_message_route_set_flags(sd_netlink_message *m, unsigned flags);
+int sd_rtnl_message_route_set_table(sd_netlink_message *m, unsigned char table);
 int sd_rtnl_message_route_get_flags(sd_netlink_message *m, unsigned *flags);
 int sd_rtnl_message_route_get_family(sd_netlink_message *m, int *family);
+int sd_rtnl_message_route_set_family(sd_netlink_message *m, int family);
 int sd_rtnl_message_route_get_protocol(sd_netlink_message *m, unsigned char *protocol);
 int sd_rtnl_message_route_get_scope(sd_netlink_message *m, unsigned char *scope);
 int sd_rtnl_message_route_get_tos(sd_netlink_message *m, unsigned char *tos);