sd-rtnl: add sd_rtnl_message_{new_neigh,neigh_get_{family,ifindex}}

src/libsystemd/sd-rtnl/rtnl-message.c

@@ -171,6 +171,59 @@ int sd_rtnl_message_new_route(sd_rtnl *rtnl, sd_rtnl_message **ret,
         return 0;
 }
 
+int sd_rtnl_message_neigh_get_family(sd_rtnl_message *m, int *family) {
+        struct ndmsg *ndm;
+
+        assert_return(m, -EINVAL);
+        assert_return(m->hdr, -EINVAL);
+        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
+        assert_return(family, -EINVAL);
+
+        ndm = NLMSG_DATA(m->hdr);
+
+        *family = ndm->ndm_family;
+
+        return 0;
+}
+
+int sd_rtnl_message_neigh_get_ifindex(sd_rtnl_message *m, int *index) {
+        struct ndmsg *ndm;
+
+        assert_return(m, -EINVAL);
+        assert_return(m->hdr, -EINVAL);
+        assert_return(rtnl_message_type_is_neigh(m->hdr->nlmsg_type), -EINVAL);
+        assert_return(index, -EINVAL);
+
+        ndm = NLMSG_DATA(m->hdr);
+
+        *index = ndm->ndm_ifindex;
+
+        return 0;
+}
+
+int sd_rtnl_message_new_neigh(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t nlmsg_type, int index, int ndm_family) {
+        struct ndmsg *ndm;
+        int r;
+
+        assert_return(rtnl_message_type_is_neigh(nlmsg_type), -EINVAL);
+        assert_return(ndm_family == AF_INET || ndm_family == AF_INET6, -EINVAL);
+        assert_return(ret, -EINVAL);
+
+        r = message_new(rtnl, ret, nlmsg_type);
+        if (r < 0)
+                return r;
+
+        if (nlmsg_type == RTM_NEWNEIGH)
+                (*ret)->hdr->nlmsg_flags |= NLM_F_CREATE | NLM_F_APPEND;
+
+        ndm = NLMSG_DATA((*ret)->hdr);
+
+        ndm->ndm_family = ndm_family;
+        ndm->ndm_ifindex = index;
+
+        return 0;
+}
+
 int sd_rtnl_message_link_set_flags(sd_rtnl_message *m, unsigned flags, unsigned change) {
         struct ifinfomsg *ifi;
 
@@ -244,7 +297,8 @@ int sd_rtnl_message_request_dump(sd_rtnl_message *m, int dump) {
         assert_return(m->hdr, -EINVAL);
         assert_return(m->hdr->nlmsg_type == RTM_GETLINK  ||
                       m->hdr->nlmsg_type == RTM_GETADDR  ||
-                      m->hdr->nlmsg_type == RTM_GETROUTE,
+                      m->hdr->nlmsg_type == RTM_GETROUTE ||
+                      m->hdr->nlmsg_type == RTM_GETNEIGH,
                       -EINVAL);
 
         if (dump)

src/libsystemd/sd-rtnl/rtnl-util.c

@@ -122,6 +122,17 @@ int rtnl_message_new_synthetic_error(int error, uint32_t serial, sd_rtnl_message
         return 0;
 }
 
+bool rtnl_message_type_is_neigh(uint16_t type) {
+        switch (type) {
+                case RTM_NEWNEIGH:
+                case RTM_GETNEIGH:
+                case RTM_DELNEIGH:
+                        return true;
+                default:
+                        return false;
+        }
+}
+
 bool rtnl_message_type_is_route(uint16_t type) {
         switch (type) {
                 case RTM_NEWROUTE:

src/libsystemd/sd-rtnl/rtnl-util.h

@@ -33,6 +33,7 @@ void rtnl_message_seal(sd_rtnl_message *m);
 bool rtnl_message_type_is_link(uint16_t type);
 bool rtnl_message_type_is_addr(uint16_t type);
 bool rtnl_message_type_is_route(uint16_t type);
+bool rtnl_message_type_is_neigh(uint16_t type);
 
 int rtnl_set_link_name(sd_rtnl **rtnl, int ifindex, const char *name);
 int rtnl_set_link_properties(sd_rtnl **rtnl, int ifindex, const char *alias, const struct ether_addr *mac, unsigned mtu);

src/systemd/sd-rtnl.h

@@ -75,6 +75,7 @@ int sd_rtnl_message_new_addr(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t msg_
                              int family);
 int sd_rtnl_message_new_route(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t nlmsg_type,
                               int rtm_family, unsigned char rtm_protocol);
+int sd_rtnl_message_new_neigh(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t msg_type, int index, int nda_family);
 
 sd_rtnl_message *sd_rtnl_message_ref(sd_rtnl_message *m);
 sd_rtnl_message *sd_rtnl_message_unref(sd_rtnl_message *m);
@@ -104,6 +105,9 @@ int sd_rtnl_message_route_set_dst_prefixlen(sd_rtnl_message *m, unsigned char pr
 int sd_rtnl_message_route_set_scope(sd_rtnl_message *m, unsigned char scope);
 int sd_rtnl_message_route_get_family(sd_rtnl_message *m, int *family);
 
+int sd_rtnl_message_neigh_get_family(sd_rtnl_message *m, int *family);
+int sd_rtnl_message_neigh_get_ifindex(sd_rtnl_message *m, int *family);
+
 int sd_rtnl_message_append_string(sd_rtnl_message *m, unsigned short type, const char *data);
 int sd_rtnl_message_append_u8(sd_rtnl_message *m, unsigned short type, uint8_t data);
 int sd_rtnl_message_append_u16(sd_rtnl_message *m, unsigned short type, uint16_t data);