Adding upstream version 241.upstream/241upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 237 insertions, 0 deletions

diff --git a/src/network/networkd-neighbor.c b/src/network/networkd-neighbor.c
new file mode 100644
index 0000000..254a60b
--- /dev/null
+++ b/src/network/networkd-neighbor.c
@@ -0,0 +1,237 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "sd-netlink.h"
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "ether-addr-util.h"
+#include "hashmap.h"
+#include "in-addr-util.h"
+#include "netlink-util.h"
+#include "networkd-link.h"
+#include "networkd-manager.h"
+#include "networkd-neighbor.h"
+
+void neighbor_free(Neighbor *neighbor) {
+        if (!neighbor)
+                return;
+
+        if (neighbor->network) {
+                LIST_REMOVE(neighbors, neighbor->network->neighbors, neighbor);
+                assert(neighbor->network->n_neighbors > 0);
+                neighbor->network->n_neighbors--;
+
+                if (neighbor->section) {
+                        hashmap_remove(neighbor->network->neighbors_by_section, neighbor->section);
+                        network_config_section_free(neighbor->section);
+                }
+        }
+
+        free(neighbor);
+}
+
+static int neighbor_new_static(Network *network, const char *filename, unsigned section_line, Neighbor **ret) {
+        _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
+        _cleanup_(neighbor_freep) Neighbor *neighbor = NULL;
+        int r;
+
+        assert(network);
+        assert(ret);
+        assert(!!filename == (section_line > 0));
+
+        if (filename) {
+                r = network_config_section_new(filename, section_line, &n);
+                if (r < 0)
+                        return r;
+
+                neighbor = hashmap_get(network->neighbors_by_section, n);
+                if (neighbor) {
+                        *ret = TAKE_PTR(neighbor);
+
+                        return 0;
+                }
+        }
+
+        neighbor = new(Neighbor, 1);
+        if (!neighbor)
+                return -ENOMEM;
+
+        *neighbor = (Neighbor) {
+                .network = network,
+                .family = AF_UNSPEC,
+        };
+
+        LIST_APPEND(neighbors, network->neighbors, neighbor);
+        network->n_neighbors++;
+
+        if (filename) {
+                neighbor->section = TAKE_PTR(n);
+
+                r = hashmap_ensure_allocated(&network->neighbors_by_section, &network_config_hash_ops);
+                if (r < 0)
+                        return r;
+
+                r = hashmap_put(network->neighbors_by_section, neighbor->section, neighbor);
+                if (r < 0)
+                        return r;
+        }
+
+        *ret = TAKE_PTR(neighbor);
+
+        return 0;
+}
+
+static int neighbor_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
+        int r;
+
+        assert(link);
+        assert(link->neighbor_messages > 0);
+
+        link->neighbor_messages--;
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        r = sd_netlink_message_get_errno(m);
+        if (r < 0 && r != -EEXIST)
+                log_link_warning_errno(link, r, "Could not set neighbor: %m");
+
+        if (link->neighbor_messages == 0) {
+                log_link_debug(link, "Neighbors set");
+                link->neighbors_configured = true;
+                link_check_ready(link);
+        }
+
+        return 1;
+}
+
+int neighbor_configure(Neighbor *neighbor, Link *link, link_netlink_message_handler_t callback) {
+        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+        int r;
+
+        assert(neighbor);
+        assert(link);
+        assert(link->ifindex > 0);
+        assert(link->manager);
+        assert(link->manager->rtnl);
+
+        if (neighbor->family == AF_UNSPEC)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Neighbor without Address= configured");
+        if (!neighbor->mac_configured)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Neighbor without MACAddress= configured");
+
+        r = sd_rtnl_message_new_neigh(link->manager->rtnl, &req, RTM_NEWNEIGH,
+                                          link->ifindex, neighbor->family);
+        if (r < 0)
+                return log_error_errno(r, "Could not allocate RTM_NEWNEIGH message: %m");
+
+        r = sd_rtnl_message_neigh_set_state(req, NUD_PERMANENT);
+        if (r < 0)
+                return log_error_errno(r, "Could not set state: %m");
+
+        r = sd_netlink_message_set_flags(req, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_REPLACE);
+        if (r < 0)
+                return log_error_errno(r, "Could not set flags: %m");
+
+        r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, &neighbor->mac);
+        if (r < 0)
+                return log_error_errno(r, "Could not append NDA_LLADDR attribute: %m");
+
+        switch (neighbor->family) {
+        case AF_INET6:
+                r = sd_netlink_message_append_in6_addr(req, NDA_DST, &neighbor->in_addr.in6);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append NDA_DST attribute: %m");
+                break;
+        case AF_INET:
+                r = sd_netlink_message_append_in_addr(req, NDA_DST, &neighbor->in_addr.in);
+                if (r < 0)
+                        return log_error_errno(r, "Could not append NDA_DST attribute: %m");
+                break;
+        default:
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Neighbor with invalid address family");
+        }
+
+        r = netlink_call_async(link->manager->rtnl, NULL, req, callback ?: neighbor_handler,
+                               link_netlink_destroy_callback, link);
+        if (r < 0)
+                return log_error_errno(r, "Could not send rtnetlink message: %m");
+
+        link->neighbor_messages++;
+        link_ref(link);
+
+        return 0;
+}
+
+int config_parse_neighbor_address(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_(neighbor_freep) Neighbor *n = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = neighbor_new_static(network, filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = in_addr_from_string_auto(rvalue, &n->family, &n->in_addr);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Neighbor Address is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        TAKE_PTR(n);
+
+        return 0;
+}
+
+int config_parse_neighbor_hwaddr(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_(neighbor_freep) Neighbor *n = NULL;
+        int r;
+
+        assert(filename);
+        assert(section);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        r = neighbor_new_static(network, filename, section_line, &n);
+        if (r < 0)
+                return r;
+
+        r = ether_addr_from_string(rvalue, &n->mac);
+        if (r < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r, "Neighbor MACAddress is invalid, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        n->mac_configured = true;
+        TAKE_PTR(n);
+
+        return 0;
+}