networkd: add support for [Address] sections

This will allow specifying more options per address than the
simple Address= entry in the [Network] section.

Preliminary support for the same functionality for [Route] sections
are added, but not yet hooked up, as more testing is needed.

1 files changed, 97 insertions, 5 deletions

diff --git a/src/network/networkd-route.c b/src/network/networkd-route.c
index 3eca3cc54..b88c62261 100644
--- a/src/network/networkd-route.c
+++ b/src/network/networkd-route.c
@@ -28,9 +28,21 @@
 #include "conf-parser.h"
 #include "net-util.h"
 
-int route_new(Network *network, Route **ret) {
+int route_new(Network *network, unsigned section, Route **ret) {
         _cleanup_route_free_ Route *route = NULL;
 
+        if (section) {
+                uint64_t key = section;
+
+                route = hashmap_get(network->routes_by_section, &key);
+                if (route) {
+                        *ret = route;
+                        route = NULL;
+
+                        return 0;
+                }
+        }
+
         route = new0(Route, 1);
         if (!route)
                 return -ENOMEM;
@@ -39,6 +51,11 @@ int route_new(Network *network, Route **ret) {
 
         LIST_PREPEND(routes, network->routes, route);
 
+        if (section) {
+                route->section = section;
+                hashmap_put(network->routes_by_section, &route->section, route);
+        }
+
         *ret = route;
         route = NULL;
 
@@ -51,6 +68,10 @@ void route_free(Route *route) {
 
         LIST_REMOVE(routes, route->network->routes, route);
 
+        if (route->section)
+                hashmap_remove(route->network->routes_by_section,
+                               &route->section);
+
         free(route);
 }
 
@@ -65,9 +86,9 @@ int route_configure(Route *route, Link *link,
         assert(link->ifindex > 0);
         assert(route->family == AF_INET || route->family == AF_INET6);
 
-        r = sd_rtnl_message_route_new(RTM_NEWROUTE, route->family, 0, 0, 0,
-                                      RT_TABLE_MAIN, RT_SCOPE_UNIVERSE, RTPROT_BOOT,
-                                      RTN_UNICAST, 0, &req);
+        r = sd_rtnl_message_route_new(RTM_NEWROUTE, route->family, route->dst_prefixlen,
+                                      0, 0, RT_TABLE_MAIN, RT_SCOPE_UNIVERSE,
+                                      RTPROT_BOOT, RTN_UNICAST, 0, &req);
         if (r < 0) {
                 log_error("Could not create RTM_NEWROUTE message: %s", strerror(-r));
                 return r;
@@ -79,6 +100,12 @@ int route_configure(Route *route, Link *link,
                 return r;
         }
 
+        r = sd_rtnl_message_append(req, RTA_DST, &route->dst_addr);
+        if (r < 0) {
+                log_error("Could not append RTA_DST attribute: %s", strerror(-r));
+                return r;
+        }
+
         r = sd_rtnl_message_append(req, RTA_OIF, &link->ifindex);
         if (r < 0) {
                 log_error("Could not append RTA_OIF attribute: %s", strerror(-r));
@@ -106,16 +133,18 @@ int config_parse_gateway(const char *unit,
                 const char *rvalue,
                 void *data,
                 void *userdata) {
+        Network *network = userdata;
         _cleanup_route_free_ Route *n = NULL;
         _cleanup_free_ char *route = NULL;
         int r;
 
         assert(filename);
+        assert(section);
         assert(lvalue);
         assert(rvalue);
         assert(data);
 
-        r = route_new(userdata, &n);
+        r = route_new(network, section_line, &n);
         if (r < 0)
                 return r;
 
@@ -130,3 +159,66 @@ int config_parse_gateway(const char *unit,
 
         return 0;
 }
+
+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) {
+        Network *network = userdata;
+        _cleanup_route_free_ Route *n = NULL;
+        _cleanup_free_ char *address = NULL;
+        const char *e;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = route_new(network, section_line, &n);
+        if (r < 0)
+                return r;
+
+        /* Destination=address/prefixlen */
+
+        /* prefixlen */
+        e = strchr(rvalue, '/');
+        if (e) {
+                unsigned i;
+                r = safe_atou(e + 1, &i);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                                   "Route destination prefix length is invalid, "
+                                   "ignoring assignment: %s", e + 1);
+                        return 0;
+                }
+
+                n->dst_prefixlen = (unsigned char) i;
+
+                address = strndup(rvalue, e - rvalue);
+                if (!address)
+                        return log_oom();
+        } else {
+                address = strdup(rvalue);
+                if (!address)
+                        return log_oom();
+        }
+
+        r = net_parse_inaddr(address, &n->family, &n->dst_addr);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, EINVAL,
+                           "Destination is invalid, ignoring assignment: %s", address);
+                return 0;
+        }
+
+        n = NULL;
+
+        return 0;
+}