add respondd-module-lldp

net/respondd-module-lldp/Makefile

@@ -0,0 +1,21 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=respondd-module-lldp
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/respondd-module-lldp
+  SECTION:=gluon
+  CATEGORY:=Gluon
+  TITLE:=adds lldp usage neighbours provider to respondd
+  DEPENDS:=+respondd +lldpd
+endef
+
+define Package/respondd-module-lldp/install
+	$(INSTALL_DIR) $(1)/usr/lib/respondd
+	$(CP) $(PKG_BUILD_DIR)/respondd.so $(1)/usr/lib/respondd/lldp.so
+endef
+
+$(eval $(call BuildPackage,respondd-module-lldp))

net/respondd-module-lldp/README.md

@@ -0,0 +1,12 @@
+This module adds a respondd lldp usage neighbours provider.
+The format is the following:
+
+```json
+{
+  "neighbours": {
+    "lldp": {
+      "01:00:00:00:00:01": [ "02:00:00:00:00:01" ]
+    }
+  }
+}
+```

net/respondd-module-lldp/src/Makefile

@@ -0,0 +1,6 @@
+all: respondd.so
+
+CFLAGS += -Wall
+
+respondd.so: respondd.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -std=c11 -shared -fPIC -D_GNU_SOURCE -o $@ $^ $(LDLIBS) -llldpctl

net/respondd-module-lldp/src/respondd.c

@@ -0,0 +1,53 @@
+#include <respondd.h>
+#include <json-c/json.h>
+#include <lldpctl.h>
+#include <lldp-const.h>
+
+static struct json_object * respondd_provider_neighbours(void) {
+    lldpctl_conn_t *conn;
+    lldpctl_atom_t *ifaces, *iface, *port, *neighbors, *neighbor;
+    const char *ctlname, *neighmac, *portmac;
+    struct json_object *ret, *ret_lldp, *neighbors_array;
+
+    ret_lldp = json_object_new_object();
+
+    ctlname = lldpctl_get_default_transport();
+    conn    = lldpctl_new_name(ctlname, NULL, NULL, NULL);
+    ifaces  = lldpctl_get_interfaces(conn);
+    lldpctl_atom_foreach(ifaces, iface) {
+        port = lldpctl_get_port(iface);
+        // check if Port ID Subtype is MAC address
+        if (lldpctl_atom_get_int(port, lldpctl_k_port_id_subtype) != LLDP_PORTID_SUBTYPE_LLADDR)
+            continue;
+
+        portmac = lldpctl_atom_get_str(port, lldpctl_k_port_id);
+        if (!portmac)
+            continue;
+
+        neighbors_array = json_object_new_array();
+        neighbors = lldpctl_atom_get(port, lldpctl_k_port_neighbors);
+        lldpctl_atom_foreach(neighbors, neighbor) {
+            // check if Chassis ID Subtype is MAC address
+            if (lldpctl_atom_get_int(neighbor, lldpctl_k_chassis_id_subtype) != LLDP_CHASSISID_SUBTYPE_LLADDR)
+                continue;
+
+            neighmac = lldpctl_atom_get_str(neighbor, lldpctl_k_chassis_id);
+            if (!neighmac)
+                continue;
+
+            json_object_array_add(neighbors_array, json_object_new_string(neighmac));
+        }
+        lldpctl_atom_dec_ref(neighbors);
+        json_object_object_add(ret_lldp, portmac, neighbors_array);
+    }
+    lldpctl_release(conn);
+
+    ret = json_object_new_object();
+    json_object_object_add(ret, "lldp", ret_lldp);
+    return ret;
+}
+
+const struct respondd_provider_info respondd_providers[] = {
+    {"neighbours", respondd_provider_neighbours},
+    {}
+};