Python-API: Inital commit of Python bindings for the VPP API.

See: https://wiki.fd.io/view/VPP/Python_API

Change-Id: If135fc32208c7031787e1935b399d930e0e1ea1f
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 1900 insertions, 0 deletions

diff --git a/vpp-api/java/japi/vppjni.c b/vpp-api/java/japi/vppjni.c
new file mode 100644
index 00000000000..9c9437d2f46
--- /dev/null
+++ b/vpp-api/java/japi/vppjni.c
@@ -0,0 +1,1900 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define _GNU_SOURCE /* for strcasestr(3) */
+#include <vnet/vnet.h>
+
+#define vl_api_version(n,v) static u32 vpe_api_version = (v);
+#include <api/vpe.api.h>
+#undef vl_api_version
+
+#include <jni.h>
+#include <japi/vppjni.h>
+#include <japi/vppjni_bridge_domain.h>
+#include <japi/vppjni_env.h>
+#include <japi/org_openvpp_vppjapi_vppConn.h>
+#include <japi/org_openvpp_vppjapi_vppApi.h>
+
+#include <api/vpe_msg_enum.h>
+#define vl_typedefs             /* define message structures */
+#include <api/vpe_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun
+#include <api/vpe_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...)
+#define vl_printfun
+#include <api/vpe_all_api_h.h>
+#undef vl_printfun
+
+#define VPPJNI_DEBUG 0
+
+#if VPPJNI_DEBUG == 1
+  #define DEBUG_LOG(...) clib_warning(__VA_ARGS__)
+#else
+  #define DEBUG_LOG(...)
+#endif
+
+static int connect_to_vpe(char *name);
+
+/*
+ * The Java runtime isn't compile w/ -fstack-protector,
+ * so we have to supply missing external references for the
+ * regular vpp libraries. Weak reference in case folks get religion
+ * at a later date...
+ */
+void __stack_chk_guard (void) __attribute__((weak));
+void __stack_chk_guard (void) {  }
+
+BIND_JAPI_CLASS(vppBridgeDomainDetails, "()V");
+BIND_JAPI_BOOL_FIELD(vppBridgeDomainDetails, arpTerm);
+BIND_JAPI_BOOL_FIELD(vppBridgeDomainDetails, flood);
+BIND_JAPI_BOOL_FIELD(vppBridgeDomainDetails, forward);
+BIND_JAPI_BOOL_FIELD(vppBridgeDomainDetails, learn);
+BIND_JAPI_BOOL_FIELD(vppBridgeDomainDetails, uuFlood);
+BIND_JAPI_INT_FIELD(vppBridgeDomainDetails, bdId);
+BIND_JAPI_STRING_FIELD(vppBridgeDomainDetails, name);
+BIND_JAPI_STRING_FIELD(vppBridgeDomainDetails, bviInterfaceName);
+BIND_JAPI_OBJ_FIELD(vppBridgeDomainDetails, interfaces, "[Lorg/openvpp/vppjapi/vppBridgeDomainInterfaceDetails;");
+
+BIND_JAPI_CLASS(vppBridgeDomainInterfaceDetails, "()V");
+BIND_JAPI_BYTE_FIELD(vppBridgeDomainInterfaceDetails, splitHorizonGroup);
+BIND_JAPI_STRING_FIELD(vppBridgeDomainInterfaceDetails, interfaceName);
+
+BIND_JAPI_CLASS(vppInterfaceCounters, "(JJJJJJJJJJJJJJJJJJJJJJ)V");
+BIND_JAPI_CLASS(vppInterfaceDetails, "(ILjava/lang/String;I[BBBBBIBBIIBBBBIIIII)V");
+BIND_JAPI_CLASS(vppIPv4Address, "(IB)V");
+BIND_JAPI_CLASS(vppIPv6Address, "([BB)V");
+BIND_JAPI_CLASS(vppL2Fib, "([BZLjava/lang/String;ZZ)V");
+BIND_JAPI_CLASS(vppVersion, "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V");
+BIND_JAPI_CLASS(vppVxlanTunnelDetails, "(IIIII)V");
+
+void vl_client_add_api_signatures (vl_api_memclnt_create_t *mp)
+{
+    /*
+     * Send the main API signature in slot 0. This bit of code must
+     * match the checks in ../vpe/api/api.c: vl_msg_api_version_check().
+     */
+    mp->api_versions[0] = clib_host_to_net_u32 (vpe_api_version);
+}
+
+/* Note: non-static, called once to set up the initial intfc table */
+static int sw_interface_dump (vppjni_main_t * jm)
+{
+    vl_api_sw_interface_dump_t *mp;
+    f64 timeout;
+    hash_pair_t * p;
+    name_sort_t * nses = 0, * ns;
+    sw_interface_subif_t * sub = NULL;
+
+    /* Toss the old name table */
+    hash_foreach_pair (p, jm->sw_if_index_by_interface_name,
+    ({
+        vec_add2 (nses, ns, 1);
+        ns->name = (u8 *)(p->key);
+        ns->value = (u32) p->value[0];
+    }));
+
+    hash_free (jm->sw_if_index_by_interface_name);
+
+    vec_foreach (ns, nses)
+        vec_free (ns->name);
+
+    vec_free (nses);
+
+    vec_foreach (sub, jm->sw_if_subif_table) {
+        vec_free (sub->interface_name);
+    }
+    vec_free (jm->sw_if_subif_table);
+
+    /* recreate the interface name hash table */
+    jm->sw_if_index_by_interface_name
+      = hash_create_string (0, sizeof(uword));
+
+    /* Get list of ethernets */
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->name_filter_valid = 1;
+    strncpy ((char *) mp->name_filter, "Ether", sizeof(mp->name_filter-1));
+    S;
+
+    /* and local / loopback interfaces */
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->name_filter_valid = 1;
+    strncpy ((char *) mp->name_filter, "lo", sizeof(mp->name_filter-1));
+    S;
+
+    /* and vxlan tunnel interfaces */
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->name_filter_valid = 1;
+    strncpy ((char *) mp->name_filter, "vxlan", sizeof(mp->name_filter-1));
+    S;
+
+    /* and tap tunnel interfaces */
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->name_filter_valid = 1;
+    strncpy ((char *) mp->name_filter, "tap", sizeof(mp->name_filter-1));
+    S;
+
+    /* and host (af_packet) interfaces */
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->name_filter_valid = 1;
+    strncpy ((char *) mp->name_filter, "host", sizeof(mp->name_filter-1));
+    S;
+
+    /* and l2tpv3 tunnel interfaces */
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->name_filter_valid = 1;
+    strncpy ((char *) mp->name_filter, "l2tpv3_tunnel",
+             sizeof(mp->name_filter-1));
+    S;
+
+    /* Use a control ping for synchronization */
+    {
+        vl_api_control_ping_t * mp;
+        M(CONTROL_PING, control_ping);
+        S;
+    }
+    W;
+}
+
+JNIEXPORT jobject JNICALL Java_org_openvpp_vppjapi_vppConn_getVppVersion0
+  (JNIEnv *env, jobject obj)
+{
+    vppjni_main_t * jm = &vppjni_main;
+
+    vppjni_lock (jm, 11);
+    jstring progName = (*env)->NewStringUTF(env, (char *)jm->program_name);
+    jstring buildDir = (*env)->NewStringUTF(env, (char *)jm->build_directory);
+    jstring version = (*env)->NewStringUTF(env, (char *)jm->version);
+    jstring buildDate = (*env)->NewStringUTF(env, (char *)jm->build_date);
+    vppjni_unlock (jm);
+
+    return vppVersionObject(env, progName, buildDir, version, buildDate);
+}
+
+static int jm_show_version (vppjni_main_t *jm)
+{
+    int rv;
+    vl_api_show_version_t *mp;
+    f64 timeout;
+
+    vppjni_lock (jm, 10);
+    M(SHOW_VERSION, show_version);
+
+    S;
+    vppjni_unlock (jm);
+    WNR;
+    return rv;
+}
+
+static int jm_stats_enable_disable (vppjni_main_t *jm, u8 enable)
+{
+    vl_api_want_stats_t * mp;
+    f64 timeout;
+    int rv;
+
+    vppjni_lock (jm, 13);
+
+    M(WANT_STATS, want_stats);
+
+    mp->enable_disable = enable;
+
+    S;
+    vppjni_unlock (jm);
+    WNR;
+
+    // already subscribed / already disabled (it's ok)
+    if (rv == -2 || rv == -3)
+        rv = 0;
+    return rv;
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_setInterfaceDescription0
+  (JNIEnv *env, jobject obj, jstring ifName, jstring ifDesc)
+{
+    int rv = 0;
+    vppjni_main_t * jm = &vppjni_main;
+    uword * p;
+    u32 sw_if_index = ~0;
+    sw_if_config_t *cfg;
+
+    const char *if_name_str = (*env)->GetStringUTFChars (env, ifName, 0);
+    const char *if_desc_str = (*env)->GetStringUTFChars (env, ifDesc, 0);
+
+    vppjni_lock (jm, 23);
+
+    p = hash_get_mem (jm->sw_if_index_by_interface_name, if_name_str);
+    if (p == 0) {
+        rv = -1;
+        goto out;
+    }
+    sw_if_index = (jint) p[0];
+
+    u8 *if_desc = 0;
+    vec_validate_init_c_string (if_desc, if_desc_str, strlen(if_desc_str));
+    (*env)->ReleaseStringUTFChars (env, ifDesc, if_desc_str);
+
+    p = hash_get (jm->sw_if_config_by_sw_if_index, sw_if_index);
+    if (p != 0) {
+        cfg = (sw_if_config_t *) (p[0]);
+        if (cfg->desc)
+            vec_free(cfg->desc);
+    } else {
+        cfg = (sw_if_config_t *) clib_mem_alloc(sizeof(sw_if_config_t));
+        hash_set (jm->sw_if_config_by_sw_if_index, sw_if_index, cfg);
+    }
+
+    cfg->desc = if_desc;
+
+out:
+    (*env)->ReleaseStringUTFChars (env, ifName, if_name_str);
+    vppjni_unlock (jm);
+    return rv;
+}
+
+JNIEXPORT jstring JNICALL Java_org_openvpp_vppjapi_vppConn_getInterfaceDescription0
+(JNIEnv * env, jobject obj, jstring ifName)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    u32 sw_if_index = ~0;
+    uword * p;
+    jstring ifDesc = NULL;
+    const char *if_name_str = (*env)->GetStringUTFChars (env, ifName, 0);
+    if (!if_name_str)
+        return NULL;
+
+    vppjni_lock (jm, 24);
+    p = hash_get_mem (jm->sw_if_index_by_interface_name, if_name_str);
+    if (p == 0)
+        goto out;
+
+    sw_if_index = (jint) p[0];
+
+    p = hash_get (jm->sw_if_config_by_sw_if_index, sw_if_index);
+    if (p == 0)
+        goto out;
+
+    sw_if_config_t *cfg = (sw_if_config_t *) (p[0]);
+    u8 * s = format (0, "%s%c", cfg->desc, 0);
+    ifDesc = (*env)->NewStringUTF(env, (char *)s);
+
+out:
+    vppjni_unlock (jm);
+
+    return ifDesc;
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_clientConnect
+  (JNIEnv *env, jobject obj, jstring clientName)
+{
+    int rv;
+    const char *client_name;
+    void vl_msg_reply_handler_hookup(void);
+    vppjni_main_t * jm = &vppjni_main;
+    api_main_t * am = &api_main;
+    u8 * heap;
+    mheap_t * h;
+    f64 timeout;
+
+    /*
+     * Bail out now if we're not running as root
+     */
+    if (geteuid() != 0)
+        return -1;
+
+    if (jm->is_connected)
+        return -2;
+
+    client_name = (*env)->GetStringUTFChars(env, clientName, 0);
+    if (!client_name)
+        return -3;
+
+    if (jm->heap == 0)
+        clib_mem_init (0, 128<<20);
+
+    heap = clib_mem_get_per_cpu_heap();
+    h = mheap_header (heap);
+
+    clib_time_init (&jm->clib_time);
+
+    rv = connect_to_vpe ((char *) client_name);
+
+    if (rv < 0)
+        clib_warning ("connection failed, rv %d", rv);
+
+    (*env)->ReleaseStringUTFChars (env, clientName, client_name);
+
+    if (rv == 0) {
+        vl_msg_reply_handler_hookup ();
+        jm->is_connected = 1;
+        /* make the main heap thread-safe */
+        h->flags |= MHEAP_FLAG_THREAD_SAFE;
+
+        jm->reply_hash = hash_create (0, sizeof (uword));
+        //jm->callback_hash = hash_create (0, sizeof (uword));
+        //jm->ping_hash = hash_create (0, sizeof (uword));
+        jm->api_main = am;
+        vjbd_main_init(&jm->vjbd_main);
+        jm->sw_if_index_by_interface_name =
+            hash_create_string (0, sizeof (uword));
+        jm->sw_if_config_by_sw_if_index =
+            hash_create (0, sizeof (uword));
+
+        {
+            // call control ping first to attach rx thread to java thread
+            vl_api_control_ping_t * mp;
+            M(CONTROL_PING, control_ping);
+            S;
+            WNR;
+
+            if (rv != 0) {
+                clib_warning ("first control ping failed: %d", rv);
+            }
+        }
+        rv = jm_show_version(jm);
+        if (rv != 0)
+            clib_warning ("unable to retrieve vpp version (rv: %d)", rv);
+        rv = sw_interface_dump(jm);
+        if (rv != 0)
+            clib_warning ("unable to retrieve interface list (rv: %d)", rv);
+        rv = jm_stats_enable_disable(jm, 1);
+        if (rv != 0)
+            clib_warning ("unable to subscribe to stats (rv: %d)", rv);
+    }
+    DEBUG_LOG ("clientConnect result: %d", rv);
+
+    return rv;
+}
+
+JNIEXPORT void JNICALL Java_org_openvpp_vppjapi_vppConn_clientDisconnect
+  (JNIEnv *env, jobject obj)
+{
+    u8 *save_heap;
+    vppjni_main_t * jm = &vppjni_main;
+    vl_client_disconnect_from_vlib();
+
+    save_heap = jm->heap;
+    memset (jm, 0, sizeof (*jm));
+    jm->heap = save_heap;
+}
+
+void vl_api_generic_reply_handler (vl_api_generic_reply_t *mp)
+{
+    api_main_t * am = &api_main;
+    u16 msg_id = clib_net_to_host_u16 (mp->_vl_msg_id);
+    trace_cfg_t *cfgp;
+    i32 retval = clib_net_to_host_u32 (mp->retval);
+    int total_bytes = sizeof(mp);
+    vppjni_main_t * jm = &vppjni_main;
+    u8 * saved_reply = 0;
+    u32 context = clib_host_to_net_u32 (mp->context);
+
+    cfgp = am->api_trace_cfg + msg_id;
+
+    if (!cfgp)
+        clib_warning ("msg id %d: no trace configuration\n", msg_id);
+    else
+        total_bytes = cfgp->size;
+
+    jm->context_id_received = context;
+
+    DEBUG_LOG ("Received generic reply for msg id %d", msg_id);
+
+    /* A generic reply, successful, we're done */
+    if (retval >= 0 && total_bytes == sizeof(*mp))
+        return;
+
+    /* Save the reply */
+    vec_validate (saved_reply, total_bytes - 1);
+    memcpy (saved_reply, mp, total_bytes);
+
+    vppjni_lock (jm, 2);
+    hash_set (jm->reply_hash, context, saved_reply);
+    jm->saved_reply_count ++;
+    vppjni_unlock (jm);
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_getRetval0
+(JNIEnv * env, jobject obj, jint context, jint release)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    vl_api_generic_reply_t * mp;
+    uword * p;
+    int rv = 0;
+
+    /* Dunno yet? */
+    if (context > jm->context_id_received)
+        return (VNET_API_ERROR_RESPONSE_NOT_READY);
+
+    vppjni_lock (jm, 1);
+    p = hash_get (jm->reply_hash, context);
+
+    /*
+     * Two cases: a generic "yes" reply - won't be in the hash table
+     * or "no", or "more data" which will be in the table.
+     */
+    if (p == 0)
+        goto out;
+
+    mp = (vl_api_generic_reply_t *) (p[0]);
+    rv = clib_net_to_host_u32 (mp->retval);
+
+    if (release) {
+        u8 * free_me = (u8 *) mp;
+        vec_free (free_me);
+        hash_unset (jm->reply_hash, context);
+        jm->saved_reply_count --;
+    }
+
+out:
+    vppjni_unlock (jm);
+    return (rv);
+}
+
+static int
+name_sort_cmp (void * a1, void * a2)
+{
+    name_sort_t * n1 = a1;
+    name_sort_t * n2 = a2;
+
+    return strcmp ((char *)n1->name, (char *)n2->name);
+}
+
+JNIEXPORT jstring JNICALL Java_org_openvpp_vppjapi_vppConn_getInterfaceList0
+  (JNIEnv * env, jobject obj, jstring name_filter)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    jstring rv;
+    hash_pair_t * p;
+    name_sort_t * nses = 0, * ns;
+    const char *this_name;
+    u8 * s = 0;
+    const char * nf = (*env)->GetStringUTFChars (env, name_filter, NULL);
+    if (!nf)
+        return NULL;
+
+    vppjni_lock (jm, 4);
+
+    hash_foreach_pair (p, jm->sw_if_index_by_interface_name,
+            ({
+                this_name = (const char *)(p->key);
+                if (strlen (nf) == 0 || strcasestr (this_name, nf)) {
+                    vec_add2 (nses, ns, 1);
+                    ns->name = (u8 *)(p->key);
+                    ns->value = (u32) p->value[0];
+                }
+            }));
+
+    vec_sort_with_function (nses, name_sort_cmp);
+
+    vec_foreach (ns, nses)
+        s = format (s, "%s: %d, ", ns->name, ns->value);
+
+    _vec_len (s) = vec_len (s) - 2;
+    vec_terminate_c_string (s);
+    vppjni_unlock (jm);
+
+    vec_free (nses);
+
+    (*env)->ReleaseStringUTFChars (env, name_filter, nf);
+
+    rv = (*env)->NewStringUTF (env, (char *) s);
+    vec_free (s);
+
+    return rv;
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_swIfIndexFromName0
+  (JNIEnv * env, jobject obj, jstring interfaceName)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    jint rv = -1;
+    const char * if_name = (*env)->GetStringUTFChars (env, interfaceName, NULL);
+    if (if_name) {
+        uword * p;
+
+        vppjni_lock (jm, 5);
+
+        p = hash_get_mem (jm->sw_if_index_by_interface_name, if_name);
+
+        if (p != 0)
+            rv = (jint) p[0];
+
+        vppjni_unlock (jm);
+
+        (*env)->ReleaseStringUTFChars (env, interfaceName, if_name);
+    }
+
+    return rv;
+}
+
+JNIEXPORT jobject JNICALL Java_org_openvpp_vppjapi_vppConn_getInterfaceCounters0
+(JNIEnv * env, jobject obj, jint swIfIndex)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    sw_interface_stats_t *s;
+    u32 sw_if_index = swIfIndex;
+    jobject result = NULL;
+
+    vppjni_lock (jm, 16);
+
+    if (sw_if_index >= vec_len(jm->sw_if_stats_by_sw_if_index)) {
+        goto out;
+    }
+    s = &jm->sw_if_stats_by_sw_if_index[sw_if_index];
+    if (!s->valid) {
+        goto out;
+    }
+
+    result = vppInterfaceCountersObject(env,
+            s->rx.octets, s->rx.pkts.ip4, s->rx.pkts.ip6, s->rx.pkts.unicast,
+            s->rx.pkts.multicast, s->rx.pkts.broadcast, s->rx.pkts.discard,
+            s->rx.pkts.fifo_full, s->rx.pkts.error, s->rx.pkts.unknown_proto,
+            s->rx.pkts.miss,
+            s->tx.octets, s->tx.pkts.ip4, s->tx.pkts.ip6, s->tx.pkts.unicast,
+            s->tx.pkts.multicast, s->tx.pkts.broadcast, s->tx.pkts.discard,
+            s->tx.pkts.fifo_full, s->tx.pkts.error, s->tx.pkts.unknown_proto,
+            s->tx.pkts.miss);
+
+out:
+    vppjni_unlock (jm);
+    return result;
+}
+
+JNIEXPORT jstring JNICALL Java_org_openvpp_vppjapi_vppConn_interfaceNameFromSwIfIndex0
+(JNIEnv * env, jobject obj, jint swIfIndex)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    sw_interface_details_t *sw_if_details;
+    u32 sw_if_index;
+    jstring ifname = NULL;
+
+    vppjni_lock (jm, 8);
+
+    sw_if_index = swIfIndex;
+
+    if (sw_if_index >= vec_len(jm->sw_if_table)) {
+        goto out;
+    }
+    sw_if_details = &jm->sw_if_table[sw_if_index];
+    if (!sw_if_details->valid) {
+        goto out;
+    }
+
+    u8 * s = format (0, "%s%c", sw_if_details->interface_name, 0);
+    ifname = (*env)->NewStringUTF(env, (char *)s);
+
+out:
+    vppjni_unlock (jm);
+
+    return ifname;
+}
+
+JNIEXPORT void JNICALL Java_org_openvpp_vppjapi_vppConn_clearInterfaceTable0
+(JNIEnv * env, jobject obj)
+{
+    vppjni_main_t * jm = &vppjni_main;
+
+    vppjni_lock (jm, 21);
+
+    vec_reset_length(jm->sw_if_table);
+
+    vppjni_unlock (jm);
+}
+
+static jobjectArray sw_if_dump_get_interfaces ();
+
+JNIEXPORT jobjectArray JNICALL Java_org_openvpp_vppjapi_vppConn_swInterfaceDump0
+(JNIEnv * env, jobject obj, jbyte name_filter_valid, jbyteArray name_filter)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    f64 timeout;
+    vl_api_sw_interface_dump_t * mp;
+    u32 my_context_id;
+    int rv;
+    rv = vppjni_sanity_check (jm);
+    if (rv) {
+        clib_warning("swInterfaceDump sanity_check rv = %d", rv);
+        return NULL;
+    }
+
+    vppjni_lock (jm, 7);
+    my_context_id = vppjni_get_context_id (jm);
+    jsize cnt = (*env)->GetArrayLength (env, name_filter);
+
+    M(SW_INTERFACE_DUMP, sw_interface_dump);
+    mp->context = clib_host_to_net_u32 (my_context_id);
+    mp->name_filter_valid = name_filter_valid;
+
+    if (cnt > sizeof(mp->name_filter))
+        cnt = sizeof(mp->name_filter);
+
+    (*env)->GetByteArrayRegion(env, name_filter, 0, cnt, (jbyte *)mp->name_filter);
+
+    DEBUG_LOG ("interface filter (%d, %s, len: %d)", mp->name_filter_valid, (char *)mp->name_filter, cnt);
+
+    jm->collect_indices = 1;
+
+    S;
+    {
+        // now send control ping so we know when it ends
+        vl_api_control_ping_t * mp;
+        M(CONTROL_PING, control_ping);
+        mp->context = clib_host_to_net_u32 (my_context_id);
+
+        S;
+    }
+    vppjni_unlock (jm);
+    WNR;
+
+    vppjni_lock (jm, 7);
+    jobjectArray result = sw_if_dump_get_interfaces(env);
+    vppjni_unlock (jm);
+    return result;
+}
+
+static jobjectArray sw_if_dump_get_interfaces (JNIEnv * env)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    sw_interface_details_t *sw_if_details;
+    u32 i;
+
+    int len = vec_len(jm->sw_if_dump_if_indices);
+
+    jobjectArray ifArray = vppInterfaceDetailsArray(env, len);
+
+    for (i = 0; i < len; i++) {
+        u32 sw_if_index = jm->sw_if_dump_if_indices[i];
+        ASSERT(sw_if_index < vec_len(jm->sw_if_table));
+        sw_if_details = &jm->sw_if_table[sw_if_index];
+        ASSERT(sw_if_details->valid);
+
+        u8 * s = format (0, "%s%c", sw_if_details->interface_name, 0);
+
+        jstring ifname = (*env)->NewStringUTF(env, (char *)s);
+        jint ifIndex = sw_if_details->sw_if_index;
+        jint supIfIndex = sw_if_details->sup_sw_if_index;
+        jbyteArray physAddr = (*env)->NewByteArray(env,
+                sw_if_details->l2_address_length);
+        (*env)->SetByteArrayRegion(env, physAddr, 0,
+                sw_if_details->l2_address_length,
+                (signed char*)sw_if_details->l2_address);
+        jint subId = sw_if_details->sub_id;
+        jint subOuterVlanId = sw_if_details->sub_outer_vlan_id;
+        jint subInnerVlanId = sw_if_details->sub_inner_vlan_id;
+        jint vtrOp = sw_if_details->vtr_op;
+        jint vtrPushDot1q = sw_if_details->vtr_push_dot1q;
+        jint vtrTag1 = sw_if_details->vtr_tag1;
+        jint vtrTag2 = sw_if_details->vtr_tag2;
+        jint linkMtu = sw_if_details->link_mtu;
+
+        jbyte adminUpDown = sw_if_details->admin_up_down;
+        jbyte linkUpDown = sw_if_details->link_up_down;
+        jbyte linkDuplex = sw_if_details->link_duplex;
+        jbyte linkSpeed = sw_if_details->link_speed;
+        jbyte subDot1ad = sw_if_details->sub_dot1ad;
+        jbyte subNumberOfTags = sw_if_details->sub_number_of_tags;
+        jbyte subExactMatch = sw_if_details->sub_exact_match;
+        jbyte subDefault = sw_if_details->sub_default;
+        jbyte subOuterVlanIdAny = sw_if_details->sub_outer_vlan_id_any;
+        jbyte subInnerVlanIdAny = sw_if_details->sub_inner_vlan_id_any;
+
+        jobject ifObj = vppInterfaceDetailsObject(env,
+                ifIndex, ifname,
+                supIfIndex, physAddr, adminUpDown, linkUpDown,
+                linkDuplex, linkSpeed, subId, subDot1ad,
+                subNumberOfTags, subOuterVlanId, subInnerVlanId,
+                subExactMatch, subDefault, subOuterVlanIdAny,
+                subInnerVlanIdAny, vtrOp, vtrPushDot1q, vtrTag1, vtrTag2, linkMtu);
+        (*env)->SetObjectArrayElement(env, ifArray, i, ifObj);
+    }
+
+    jm->collect_indices = 0;
+    vec_reset_length(jm->sw_if_dump_if_indices);
+    return ifArray;
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_findOrAddBridgeDomainId0
+  (JNIEnv * env, jobject obj, jstring bridgeDomain)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    jint rv = -1;
+    const char * bdName = (*env)->GetStringUTFChars (env, bridgeDomain, NULL);
+    if (bdName) {
+        static u8 * bd_name = 0;
+
+        vec_validate_init_c_string (bd_name, bdName, strlen(bdName));
+        (*env)->ReleaseStringUTFChars (env, bridgeDomain, bdName);
+
+        vppjni_lock (jm, 6);
+        rv = (jint)vjbd_find_or_add_bd (&jm->vjbd_main, bd_name);
+        vppjni_unlock (jm);
+
+        _vec_len(bd_name) = 0;
+    }
+    return rv;
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_bridgeDomainIdFromName0
+  (JNIEnv * env, jobject obj, jstring bridgeDomain)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    jint rv = -1;
+    const char * bdName = (*env)->GetStringUTFChars (env, bridgeDomain, NULL);
+    if (bdName) {
+        static u8 * bd_name = 0;
+
+        vec_validate_init_c_string (bd_name, bdName, strlen(bdName));
+        (*env)->ReleaseStringUTFChars (env, bridgeDomain, bdName);
+
+        vppjni_lock (jm, 20);
+        rv = (jint)vjbd_id_from_name(&jm->vjbd_main, (u8 *)bd_name);
+        vppjni_unlock (jm);
+
+        _vec_len(bd_name) = 0;
+    }
+
+    return rv;
+}
+
+JNIEXPORT jint JNICALL Java_org_openvpp_vppjapi_vppConn_bridgeDomainIdFromInterfaceName0
+  (JNIEnv * env, jobject obj, jstring interfaceName)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    u32 sw_if_index;
+    jint rv = -1;
+    const char * if_name;
+    uword * p;
+
+    if_name = (*env)->GetStringUTFChars (env, interfaceName, NULL);
+
+    vppjni_lock (jm, 14);
+
+    p = hash_get_mem (jm->sw_if_index_by_interface_name, if_name);
+
+    if (p != 0) {
+        sw_if_index = (jint) p[0];
+        p = hash_get (bdm->bd_id_by_sw_if_index, sw_if_index);
+        if (p != 0) {
+            rv = (jint) p[0];
+        }
+    }
+
+    vppjni_unlock (jm);
+
+    (*env)->ReleaseStringUTFChars (env, interfaceName, if_name);
+
+    return rv;
+}
+
+/*
+ * Special-case: build the interface table, maintain
+ * the next loopback sw_if_index vbl.
+ */
+static void vl_api_sw_interface_details_t_handler
+(vl_api_sw_interface_details_t * mp)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    static sw_interface_details_t empty_sw_if_details = {0,};
+    sw_interface_details_t *sw_if_details;
+    u32 sw_if_index;
+
+    vppjni_lock (jm, 1);
+
+    sw_if_index = ntohl (mp->sw_if_index);
+
+    u8 * s = format (0, "%s%c", mp->interface_name, 0);
+
+    if (jm->collect_indices) {
+        u32 pos = vec_len(jm->sw_if_dump_if_indices);
+        vec_validate(jm->sw_if_dump_if_indices, pos);
+        jm->sw_if_dump_if_indices[pos] = sw_if_index;
+    }
+
+    vec_validate_init_empty(jm->sw_if_table, sw_if_index, empty_sw_if_details);
+    sw_if_details = &jm->sw_if_table[sw_if_index];
+    sw_if_details->valid = 1;
+
+    snprintf((char *)sw_if_details->interface_name,
+            sizeof(sw_if_details->interface_name), "%s", (char *)s);
+    sw_if_details->sw_if_index = sw_if_index;
+    sw_if_details->sup_sw_if_index = ntohl(mp->sup_sw_if_index);
+    sw_if_details->l2_address_length = ntohl (mp->l2_address_length);
+    ASSERT(sw_if_details->l2_address_length <= sizeof(sw_if_details->l2_address));
+    memcpy(sw_if_details->l2_address, mp->l2_address,
+            sw_if_details->l2_address_length);
+    sw_if_details->sub_id = ntohl (mp->sub_id);
+    sw_if_details->sub_outer_vlan_id = ntohl (mp->sub_outer_vlan_id);
+    sw_if_details->sub_inner_vlan_id = ntohl (mp->sub_inner_vlan_id);
+    sw_if_details->vtr_op = ntohl (mp->vtr_op);
+    sw_if_details->vtr_push_dot1q = ntohl (mp->vtr_push_dot1q);
+    sw_if_details->vtr_tag1 = ntohl (mp->vtr_tag1);
+    sw_if_details->vtr_tag2 = ntohl (mp->vtr_tag2);
+
+    sw_if_details->admin_up_down = mp->admin_up_down;
+    sw_if_details->link_up_down = mp->link_up_down;
+    sw_if_details->link_duplex = mp->link_duplex;
+    sw_if_details->link_speed = mp->link_speed;
+    sw_if_details->sub_dot1ad = mp->sub_dot1ad;
+    sw_if_details->sub_number_of_tags = mp->sub_number_of_tags;
+    sw_if_details->sub_exact_match = mp->sub_exact_match;
+    sw_if_details->sub_default = mp->sub_default;
+    sw_if_details->sub_outer_vlan_id_any = mp->sub_outer_vlan_id_any;
+    sw_if_details->sub_inner_vlan_id_any = mp->sub_inner_vlan_id_any;
+
+    hash_set_mem (jm->sw_if_index_by_interface_name, s, sw_if_index);
+    DEBUG_LOG ("Got interface %s", (char *)s);
+
+    /* In sub interface case, fill the sub interface table entry */
+    if (mp->sw_if_index != mp->sup_sw_if_index) {
+        sw_interface_subif_t * sub = NULL;
+
+        vec_add2(jm->sw_if_subif_table, sub, 1);
+
+        vec_validate(sub->interface_name, strlen((char *)s) + 1);
+        strncpy((char *)sub->interface_name, (char *)s,
+                vec_len(sub->interface_name));
+        sub->sw_if_index = ntohl(mp->sw_if_index);
+        sub->sub_id = ntohl(mp->sub_id);
+
+        sub->sub_dot1ad = mp->sub_dot1ad;
+        sub->sub_number_of_tags = mp->sub_number_of_tags;
+        sub->sub_outer_vlan_id = ntohs(mp->sub_outer_vlan_id);
+        sub->sub_inner_vlan_id = ntohs(mp->sub_inner_vlan_id);
+        sub->sub_exact_match = mp->sub_exact_match;
+        sub->sub_default = mp->sub_default;
+        sub->sub_outer_vlan_id_any = mp->sub_outer_vlan_id_any;
+        sub->sub_inner_vlan_id_any = mp->sub_inner_vlan_id_any;
+
+        /* vlan tag rewrite */
+        sub->vtr_op = ntohl(mp->vtr_op);
+        sub->vtr_push_dot1q = ntohl(mp->vtr_push_dot1q);
+        sub->vtr_tag1 = ntohl(mp->vtr_tag1);
+        sub->vtr_tag2 = ntohl(mp->vtr_tag2);
+    }
+    vppjni_unlock (jm);
+}
+
+static void vl_api_sw_interface_set_flags_t_handler
+(vl_api_sw_interface_set_flags_t * mp)
+{
+  /* $$$ nothing for the moment */
+}
+
+static jintArray create_array_of_bd_ids(JNIEnv * env, jint bd_id)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    u32 *buf = NULL;
+    u32 i;
+
+    if (bd_id != ~0) {
+        vec_add1(buf, bd_id);
+    } else {
+        for (i = 0; i < vec_len(bdm->bd_oper); i++) {
+            u32 bd_id = bdm->bd_oper[i].bd_id;
+            vec_add1(buf, bd_id);
+        }
+    }
+
+    jintArray bdidArray = (*env)->NewIntArray(env, vec_len(buf));
+    if (!bdidArray) {
+        goto out;
+    }
+
+    (*env)->SetIntArrayRegion(env, bdidArray, 0, vec_len(buf), (int*)buf);
+
+out:
+    vec_free(buf);
+    return bdidArray;
+}
+
+static void bridge_domain_oper_free(void)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t *bdm = &jm->vjbd_main;
+    u32 i;
+
+    for (i = 0; i < vec_len(bdm->bd_oper); i++) {
+        vec_free(bdm->bd_oper->l2fib_oper);
+    }
+    vec_reset_length(bdm->bd_oper);
+    hash_free(bdm->bd_id_by_sw_if_index);
+    hash_free(bdm->oper_bd_index_by_bd_id);
+}
+
+JNIEXPORT jintArray JNICALL Java_org_openvpp_vppjapi_vppConn_bridgeDomainDump0
+(JNIEnv * env, jobject obj, jint bd_id)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vl_api_bridge_domain_dump_t * mp;
+    u32 my_context_id;
+    f64 timeout;
+    int rv;
+    rv = vppjni_sanity_check (jm);
+    if (rv) return NULL;
+
+    vppjni_lock (jm, 15);
+
+    if (~0 == bd_id) {
+        bridge_domain_oper_free();
+    }
+
+    my_context_id = vppjni_get_context_id (jm);
+    M(BRIDGE_DOMAIN_DUMP, bridge_domain_dump);
+    mp->context = clib_host_to_net_u32 (my_context_id);
+    mp->bd_id = clib_host_to_net_u32(bd_id);
+    S;
+
+    /* Use a control ping for synchronization */
+    {
+        vl_api_control_ping_t * mp;
+        M(CONTROL_PING, control_ping);
+        S;
+    }
+
+    WNR;
+    if (0 != rv) {
+        return NULL;
+    }
+
+    jintArray ret = create_array_of_bd_ids(env, bd_id);
+
+    vppjni_unlock (jm);
+
+    return ret;
+}
+
+static void
+vl_api_bridge_domain_details_t_handler (vl_api_bridge_domain_details_t * mp)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    vjbd_oper_t * bd_oper;
+    u32 bd_id, bd_index;
+
+    bd_id = ntohl (mp->bd_id);
+
+    bd_index = vec_len(bdm->bd_oper);
+    vec_validate (bdm->bd_oper, bd_index);
+    bd_oper = vec_elt_at_index(bdm->bd_oper, bd_index);
+
+    hash_set(bdm->oper_bd_index_by_bd_id, bd_id, bd_index);
+
+    bd_oper->bd_id = bd_id;
+    bd_oper->flood = mp->flood != 0;
+    bd_oper->forward = mp->forward != 0;
+    bd_oper->learn =  mp->learn != 0;
+    bd_oper->uu_flood = mp->uu_flood != 0;
+    bd_oper->arp_term = mp->arp_term != 0;
+    bd_oper->bvi_sw_if_index = ntohl (mp->bvi_sw_if_index);
+    bd_oper->n_sw_ifs = ntohl (mp->n_sw_ifs);
+
+    bd_oper->bd_sw_if_oper = 0;
+}
+
+static void
+vl_api_bridge_domain_sw_if_details_t_handler
+(vl_api_bridge_domain_sw_if_details_t * mp)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    bd_sw_if_oper_t * bd_sw_if_oper;
+    u32 bd_id, sw_if_index;
+
+    bd_id = ntohl (mp->bd_id);
+    sw_if_index = ntohl (mp->sw_if_index);
+
+    uword *p;
+    p = hash_get (bdm->oper_bd_index_by_bd_id, bd_id);
+    if (p == 0) {
+        clib_warning("Invalid bd_id %d in bridge_domain_sw_if_details_t_handler", bd_id);
+        return;
+    }
+    u32 oper_bd_index = (jint) p[0];
+    vjbd_oper_t *bd_oper = vec_elt_at_index(bdm->bd_oper, oper_bd_index);
+
+    u32 len = vec_len(bd_oper->bd_sw_if_oper);
+    vec_validate(bd_oper->bd_sw_if_oper, len);
+    bd_sw_if_oper = &bd_oper->bd_sw_if_oper[len];
+    bd_sw_if_oper->bd_id = bd_id;
+    bd_sw_if_oper->sw_if_index = sw_if_index;
+    bd_sw_if_oper->shg = mp->shg;
+
+    hash_set(bdm->bd_id_by_sw_if_index, sw_if_index, bd_id);
+}
+
+static const char* interface_name_from_sw_if_index(u32 sw_if_index)
+{
+    vppjni_main_t *jm = &vppjni_main;
+
+    if (sw_if_index >= vec_len(jm->sw_if_table)) {
+        return NULL;
+    }
+    if (!jm->sw_if_table[sw_if_index].valid) {
+        return NULL;
+    }
+    return (const char*)jm->sw_if_table[sw_if_index].interface_name;
+}
+
+JNIEXPORT jobject JNICALL Java_org_openvpp_vppjapi_vppConn_getBridgeDomainDetails0
+(JNIEnv * env, jobject obj, jint bdId)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    u32 oper_bd_index;
+    u32 bd_id = bdId;
+    jobject rv = NULL;
+    uword *p;
+
+    vppjni_lock (jm, 16);
+
+    p = hash_get (bdm->oper_bd_index_by_bd_id, bd_id);
+    if (p == 0) {
+        rv = NULL;
+        goto out;
+    }
+    oper_bd_index = (jint) p[0];
+
+    vjbd_oper_t *bd_oper = vec_elt_at_index(bdm->bd_oper, oper_bd_index);
+
+
+    /* setting BridgeDomainDetails */
+
+    jobject bddObj = vppBridgeDomainDetailsObject(env);
+
+    u8 *vec_bd_name = vjbd_oper_name_from_id(bdm, bd_id);
+    if (NULL == vec_bd_name) {
+        rv = NULL;
+        goto out;
+    }
+    char *str_bd_name = (char*)format (0, "%s%c", vec_bd_name, 0);
+    vec_free(vec_bd_name);
+    jstring bdName = (*env)->NewStringUTF(env, str_bd_name);
+    vec_free(str_bd_name);
+    if (NULL == bdName) {
+        rv = NULL;
+        goto out;
+    }
+
+    set_vppBridgeDomainDetails_name(env, bddObj, bdName);
+    set_vppBridgeDomainDetails_bdId(env, bddObj, bdId);
+    set_vppBridgeDomainDetails_flood(env, bddObj, (jboolean)bd_oper->flood);
+    set_vppBridgeDomainDetails_uuFlood(env, bddObj, (jboolean)bd_oper->uu_flood);
+    set_vppBridgeDomainDetails_forward(env, bddObj, (jboolean)bd_oper->forward);
+    set_vppBridgeDomainDetails_learn(env, bddObj, (jboolean)bd_oper->learn);
+    set_vppBridgeDomainDetails_arpTerm(env, bddObj, (jboolean)bd_oper->arp_term);
+
+    jstring bviInterfaceName = NULL;
+    if (~0 != bd_oper->bvi_sw_if_index) {
+        const char *str_if_name = interface_name_from_sw_if_index(bd_oper->bvi_sw_if_index);
+        if (NULL == str_if_name) {
+            clib_warning("Could not get interface name for sw_if_index %d", bd_oper->bvi_sw_if_index);
+            rv = NULL;
+            goto out;
+        }
+        bviInterfaceName = (*env)->NewStringUTF(env, str_if_name);
+        if (NULL == bviInterfaceName) {
+            rv = NULL;
+            goto out;
+        }
+    }
+
+    set_vppBridgeDomainDetails_bviInterfaceName(env, bddObj, bviInterfaceName);
+
+    /* setting BridgeDomainInterfaceDetails */
+
+    u32 len = vec_len(bd_oper->bd_sw_if_oper);
+    ASSERT(len == bd_oper->n_sw_ifs);
+
+    jobjectArray bdidArray = vppBridgeDomainInterfaceDetailsArray(env, len);
+
+    u32 i;
+    for (i = 0; i < len; i++) {
+        bd_sw_if_oper_t *sw_if_oper = &bd_oper->bd_sw_if_oper[i];
+
+        jobject bdidObj = vppBridgeDomainInterfaceDetailsObject(env);
+        (*env)->SetObjectArrayElement(env, bdidArray, i, bdidObj);
+
+        u32 sw_if_index = sw_if_oper->sw_if_index;
+        const char *str_if_name = interface_name_from_sw_if_index(sw_if_index);
+        if (NULL == str_if_name) {
+            rv = NULL;
+            goto out;
+        }
+        jstring interfaceName = (*env)->NewStringUTF(env, str_if_name);
+        if (NULL == interfaceName) {
+            rv = NULL;
+            goto out;
+        }
+
+        set_vppBridgeDomainInterfaceDetails_interfaceName(env, bdidObj, interfaceName);
+        set_vppBridgeDomainInterfaceDetails_splitHorizonGroup(env, bdidObj, (jbyte)sw_if_oper->shg);
+    }
+
+    set_vppBridgeDomainDetails_interfaces(env, bddObj, bdidArray);
+
+    rv = bddObj;
+
+out:
+
+    vppjni_unlock (jm);
+
+    return rv;
+}
+
+static jobject l2_fib_create_object(JNIEnv *env, bd_l2fib_oper_t *l2_fib)
+{
+    u32 sw_if_index = l2_fib->sw_if_index;
+    const char *str_if_name = interface_name_from_sw_if_index(sw_if_index);
+    if (NULL == str_if_name) {
+        return NULL;
+    }
+    jstring interfaceName = (*env)->NewStringUTF(env, str_if_name);
+    if (NULL == interfaceName) {
+        return NULL;
+    }
+
+    jbyteArray physAddr = (*env)->NewByteArray(env, 6);
+    (*env)->SetByteArrayRegion(env, physAddr, 0, 6,
+            (signed char*)l2_fib->mac_addr.fields.mac);
+    jboolean staticConfig = !l2_fib->learned;
+    jstring outgoingInterface = interfaceName;
+    jboolean filter = l2_fib->filter;
+    jboolean bridgedVirtualInterface = l2_fib->bvi;
+
+    return vppL2FibObject(env, physAddr, staticConfig, outgoingInterface, filter, bridgedVirtualInterface);
+}
+
+JNIEXPORT jobjectArray JNICALL Java_org_openvpp_vppjapi_vppConn_l2FibTableDump0
+(JNIEnv * env, jobject obj, jint bd_id)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    vl_api_l2_fib_table_dump_t *mp;
+    jobjectArray l2FibArray = NULL;
+    vjbd_oper_t *bd_oper;
+    u32 oper_bd_index;
+    uword *p;
+    f64 timeout;
+    int rv;
+    u32 i;
+
+    vppjni_lock (jm, 17);
+
+    //vjbd_l2fib_oper_reset (bdm);
+
+    p = hash_get (bdm->oper_bd_index_by_bd_id, bd_id);
+    if (p == 0) {
+        goto done;
+    }
+    oper_bd_index = p[0];
+    bd_oper = vec_elt_at_index(bdm->bd_oper, oper_bd_index);
+    vec_reset_length (bd_oper->l2fib_oper);
+
+    /* Get list of l2 fib table entries */
+    M(L2_FIB_TABLE_DUMP, l2_fib_table_dump);
+    mp->bd_id = ntohl(bd_id);
+    S;
+
+    /* Use a control ping for synchronization */
+    {
+        vl_api_control_ping_t * mp;
+        M(CONTROL_PING, control_ping);
+        S;
+    }
+
+    WNR;
+    if (0 != rv) {
+        goto done;
+    }
+
+    u32 count = vec_len(bd_oper->l2fib_oper);
+    bd_l2fib_oper_t *l2fib_oper = bd_oper->l2fib_oper;
+
+    l2FibArray = vppL2FibArray(env, count);
+    for (i = 0; i < count; i++) {
+        bd_l2fib_oper_t *l2_fib = &l2fib_oper[i];
+        jobject l2FibObj = l2_fib_create_object(env, l2_fib);
+        (*env)->SetObjectArrayElement(env, l2FibArray, i, l2FibObj);
+    }
+
+done:
+    vppjni_unlock (jm);
+
+    return l2FibArray;
+}
+
+static void
+vl_api_l2_fib_table_entry_t_handler (vl_api_l2_fib_table_entry_t * mp)
+{
+    //static u8 * mac_addr;
+    vppjni_main_t *jm = &vppjni_main;
+    vjbd_main_t * bdm = &jm->vjbd_main;
+    vjbd_oper_t * bd_oper;
+    u32 bd_id, oper_bd_index;
+    //uword mhash_val_l2fi;
+    bd_l2fib_oper_t * l2fib_oper;
+    l2fib_u64_mac_t * l2fe_u64_mac = (l2fib_u64_mac_t *)&mp->mac;
+
+    bd_id = ntohl (mp->bd_id);
+
+    uword *p = hash_get (bdm->oper_bd_index_by_bd_id, bd_id);
+    if (p == 0) {
+        return;
+    }
+    oper_bd_index = (jint) p[0];
+    bd_oper = vec_elt_at_index(bdm->bd_oper, oper_bd_index);
+
+#if 0
+    vec_validate (mac_addr, MAC_ADDRESS_SIZE);
+    memcpy (mac_addr, l2fe_u64_mac->fields.mac, MAC_ADDRESS_SIZE);
+    mhash_val_l2fi = vec_len (bd_oper->l2fib_oper);
+    if (mhash_elts (&bd_oper->l2fib_index_by_mac) == 0)
+        mhash_init (&bd_oper->l2fib_index_by_mac, sizeof (u32), MAC_ADDRESS_SIZE);
+    mhash_set_mem (&bd_oper->l2fib_index_by_mac, mac_addr, &mhash_val_l2fi, 0);
+#endif
+
+    vec_add2 (bd_oper->l2fib_oper, l2fib_oper, 1);
+
+    l2fib_oper->bd_id = bd_id;
+    l2fib_oper->mac_addr.raw = l2fib_mac_to_u64 (l2fe_u64_mac->fields.mac);
+    l2fib_oper->sw_if_index = ntohl (mp->sw_if_index);
+    l2fib_oper->learned = !mp->static_mac;
+    l2fib_oper->filter = mp->filter_mac;
+    l2fib_oper->bvi = mp->bvi_mac;
+}
+
+static int ipAddressDump
+(JNIEnv * env, jobject obj, jstring interfaceName, jboolean isIPv6)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vl_api_ip_address_dump_t * mp;
+    const char *if_name;
+    u32 my_context_id;
+    u32 sw_if_index;
+    f64 timeout;
+    uword *p;
+    int rv = 0;
+
+    if (NULL == interfaceName) {
+        return -1;
+    }
+
+    if_name = (*env)->GetStringUTFChars (env, interfaceName, NULL);
+    if (!if_name) {
+        return -1;
+    }
+
+    p = hash_get_mem (jm->sw_if_index_by_interface_name, if_name);
+    (*env)->ReleaseStringUTFChars (env, interfaceName, if_name);
+    if (p == 0) {
+        return -1;
+    }
+    sw_if_index = (u32) p[0];
+
+    rv = vppjni_sanity_check (jm);
+    if (0 != rv) {
+        return rv;
+    }
+
+    my_context_id = vppjni_get_context_id (jm);
+    M(IP_ADDRESS_DUMP, ip_address_dump);
+    mp->context = clib_host_to_net_u32 (my_context_id);
+    mp->sw_if_index = clib_host_to_net_u32(sw_if_index);
+    mp->is_ipv6 = isIPv6;
+    jm->is_ipv6 = isIPv6;
+    S;
+
+    /* Use a control ping for synchronization */
+    {
+      vl_api_control_ping_t * mp;
+      M(CONTROL_PING, control_ping);
+      S;
+    }
+
+    WNR;
+
+    return rv;
+}
+
+JNIEXPORT jobjectArray JNICALL Java_org_openvpp_vppjapi_vppConn_ipv4AddressDump0
+(JNIEnv * env, jobject obj, jstring interfaceName)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    jobject returnArray = NULL;
+    int i;
+
+    vppjni_lock (jm, 18);
+
+    vec_reset_length(jm->ipv4_addresses);
+
+    if (0 != ipAddressDump(env, obj, interfaceName, 0)) {
+        goto done;
+    }
+
+    u32 count = vec_len(jm->ipv4_addresses);
+    ipv4_address_t *ipv4_address = jm->ipv4_addresses;
+
+    jobjectArray ipv4AddressArray = vppIPv4AddressArray(env, count);
+
+    for (i = 0; i < count; i++) {
+        ipv4_address_t *address = &ipv4_address[i];
+
+        jint ip = address->ip;
+        jbyte prefixLength = address->prefix_length;
+
+        jobject ipv4AddressObj = vppIPv4AddressObject(env, ip, prefixLength);
+
+        (*env)->SetObjectArrayElement(env, ipv4AddressArray, i, ipv4AddressObj);
+    }
+
+    returnArray = ipv4AddressArray;
+
+done:
+    vppjni_unlock (jm);
+    return returnArray;
+}
+
+JNIEXPORT jobjectArray JNICALL Java_org_openvpp_vppjapi_vppConn_ipv6AddressDump0
+(JNIEnv * env, jobject obj, jstring interfaceName)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    jobject returnArray = NULL;
+    int i;
+
+    vppjni_lock (jm, 19);
+
+    vec_reset_length(jm->ipv6_addresses);
+
+    if (0 != ipAddressDump(env, obj, interfaceName, 1)) {
+        goto done;
+    }
+
+    u32 count = vec_len(jm->ipv6_addresses);
+    ipv6_address_t *ipv6_address = jm->ipv6_addresses;
+
+    jobjectArray ipv6AddressArray = vppIPv6AddressArray(env, count);
+
+    for (i = 0; i < count; i++) {
+        ipv6_address_t *address = &ipv6_address[i];
+
+        jbyteArray ip = (*env)->NewByteArray(env, 16);
+        (*env)->SetByteArrayRegion(env, ip, 0, 16,
+                (signed char*)address->ip);
+
+        jbyte prefixLength = address->prefix_length;
+
+        jobject ipv6AddressObj = vppIPv6AddressObject(env, ip, prefixLength);
+
+        (*env)->SetObjectArrayElement(env, ipv6AddressArray, i, ipv6AddressObj);
+    }
+
+    returnArray = ipv6AddressArray;
+
+done:
+    vppjni_unlock (jm);
+    return returnArray;
+}
+
+static void vl_api_ip_address_details_t_handler (vl_api_ip_address_details_t * mp)
+{
+    vppjni_main_t * jm = &vppjni_main;
+
+    if (!jm->is_ipv6) {
+        ipv4_address_t *address = 0;
+        vec_add2(jm->ipv4_addresses, address, 1);
+        memcpy(&address->ip, mp->ip, 4);
+        address->prefix_length = mp->prefix_length;
+    } else {
+        ipv6_address_t *address = 0;
+        vec_add2(jm->ipv6_addresses, address, 1);
+        memcpy(address->ip, mp->ip, 16);
+        address->prefix_length = mp->prefix_length;
+    }
+}
+
+#define VXLAN_TUNNEL_INTERFACE_NAME_PREFIX "vxlan_tunnel"
+
+JNIEXPORT jobjectArray JNICALL Java_org_openvpp_vppjapi_vppConn_vxlanTunnelDump0
+(JNIEnv * env, jobject obj, jint swIfIndex)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    vl_api_vxlan_tunnel_dump_t * mp;
+    jobjectArray returnArray = NULL;
+    u32 my_context_id;
+    f64 timeout;
+    int rv = 0;
+    int i;
+
+    vppjni_lock (jm, 22);
+
+    vec_reset_length(jm->vxlan_tunnel_details);
+
+    my_context_id = vppjni_get_context_id (jm);
+    M(VXLAN_TUNNEL_DUMP, vxlan_tunnel_dump);
+    mp->context = clib_host_to_net_u32 (my_context_id);
+    mp->sw_if_index = clib_host_to_net_u32 (swIfIndex);
+    S;
+
+    /* Use a control ping for synchronization */
+    {
+      vl_api_control_ping_t * mp;
+      M(CONTROL_PING, control_ping);
+      S;
+    }
+
+    WNR;
+    if (0 != rv) {
+        goto done;
+    }
+
+    u32 count = vec_len(jm->vxlan_tunnel_details);
+
+    jobjectArray vxlanTunnelDetailsArray = vppVxlanTunnelDetailsArray(env, count);
+
+    for (i = 0; i < count; i++) {
+        vxlan_tunnel_details_t *details = &jm->vxlan_tunnel_details[i];
+
+        jint src_address = details->src_address;
+        jint dst_address = details->dst_address;
+        jint encap_vrf_id = details->encap_vrf_id;
+        jint vni = details->vni;
+        jint decap_next_index = details->decap_next_index;
+
+        jobject vxlanTunnelDetailsObj = vppVxlanTunnelDetailsObject(env,
+                src_address, dst_address, encap_vrf_id, vni, decap_next_index);
+
+        (*env)->SetObjectArrayElement(env, vxlanTunnelDetailsArray, i,
+                vxlanTunnelDetailsObj);
+    }
+
+    returnArray = vxlanTunnelDetailsArray;
+
+done:
+    vppjni_unlock (jm);
+    return returnArray;
+}
+
+static void vl_api_vxlan_tunnel_details_t_handler
+(vl_api_vxlan_tunnel_details_t * mp)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    vxlan_tunnel_details_t *tunnel_details;
+
+    vec_add2(jm->vxlan_tunnel_details, tunnel_details, 1);
+    tunnel_details->src_address = ntohl(mp->src_address);
+    tunnel_details->dst_address = ntohl(mp->dst_address);
+    tunnel_details->encap_vrf_id = ntohl(mp->encap_vrf_id);
+    tunnel_details->vni = ntohl(mp->vni);
+    tunnel_details->decap_next_index = ntohl(mp->decap_next_index);
+}
+
+/* cleanup handler for RX thread */
+static void cleanup_rx_thread(void *arg)
+{
+    vppjni_main_t * jm = &vppjni_main;
+
+    vppjni_lock (jm, 99);
+
+    int getEnvStat = (*jm->jvm)->GetEnv(jm->jvm, (void **)&(jm->jenv), JNI_VERSION_1_6);
+    if (getEnvStat == JNI_EVERSION) {
+        clib_warning ("Unsupported JNI version\n");
+        jm->retval = -999;
+        goto out;
+    } else if (getEnvStat != JNI_EDETACHED) {
+        (*jm->jvm)->DetachCurrentThread(jm->jvm);
+    }
+out:
+    vppjni_unlock (jm);
+}
+
+static void
+vl_api_show_version_reply_t_handler (vl_api_show_version_reply_t * mp)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    i32 retval = ntohl(mp->retval);
+
+    if (retval >= 0) {
+        DEBUG_LOG ("show version request succeeded(%d)");
+        strncpy((char*)jm->program_name, (const char*)mp->program,
+                sizeof(jm->program_name)-1);
+        jm->program_name[sizeof(jm->program_name)-1] = 0;
+
+        strncpy((char*)jm->build_directory, (const char*)mp->build_directory,
+                sizeof(jm->build_directory)-1);
+        jm->build_directory[sizeof(jm->build_directory)-1] = 0;
+
+        strncpy((char*)jm->version, (const char*)mp->version,
+                sizeof(jm->version)-1);
+        jm->version[sizeof(jm->version)-1] = 0;
+
+        strncpy((char*)jm->build_date, (const char*)mp->build_date,
+                sizeof(jm->build_date)-1);
+        jm->build_date[sizeof(jm->build_date)-1] = 0;
+    } else {
+        clib_error ("show version request failed(%d)", retval);
+    }
+    jm->retval = retval;
+    jm->result_ready = 1;
+}
+
+static void vl_api_want_stats_reply_t_handler (vl_api_want_stats_reply_t * mp)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    jm->retval = mp->retval; // FIXME: vpp api does not do ntohl on this retval
+    jm->result_ready = 1;
+}
+
+// control ping needs to be very first thing called
+// to attach rx thread to java thread
+static void vl_api_control_ping_reply_t_handler
+(vl_api_control_ping_reply_t * mp)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    i32 retval = ntohl(mp->retval);
+    jm->retval = retval;
+
+    // attach to java thread if not attached
+    int getEnvStat = (*jm->jvm)->GetEnv(jm->jvm, (void **)&(jm->jenv), JNI_VERSION_1_6);
+    if (getEnvStat == JNI_EDETACHED) {
+        if ((*jm->jvm)->AttachCurrentThread(jm->jvm, (void **)&(jm->jenv), NULL) != 0) {
+            clib_warning("Failed to attach thread\n");
+            jm->retval = -999;
+            goto out;
+        }
+
+        // workaround as we can't use pthread_cleanup_push
+        pthread_key_create(&jm->cleanup_rx_thread_key, cleanup_rx_thread);
+        // destructor is only called if the value of key is non null
+        pthread_setspecific(jm->cleanup_rx_thread_key, (void *)1);
+    } else if (getEnvStat == JNI_EVERSION) {
+        clib_warning ("Unsupported JNI version\n");
+        jm->retval = -999;
+        goto out;
+    }
+    // jm->jenv is now stable global reference that can be reused (only within RX thread)
+
+#if 0
+    // ! callback system removed for now
+    //
+    // get issuer msg-id
+    p = hash_get (jm->ping_hash, context);
+    if (p != 0) { // ping marks end of some dump call
+        JNIEnv *env = jm->jenv;
+        u16 msg_id = (u16)p[0];
+
+        // we will no longer need this
+        hash_unset (jm->ping_hash, context);
+
+        // get original caller obj
+        p = hash_get (jm->callback_hash, context);
+
+        if (p == 0) // don't have callback stored
+            goto out;
+
+        jobject obj = (jobject)p[0]; // object that called original call
+
+        switch (msg_id) {
+            case VL_API_SW_INTERFACE_DUMP:
+                if (0 != sw_if_dump_call_all_callbacks(obj)) {
+                    goto out2;
+                }
+                break;
+            default:
+                clib_warning("Unhandled control ping issuer msg-id: %d", msg_id);
+                goto out2;
+                break;
+        }
+out2:
+        // free the saved obj
+        hash_unset (jm->callback_hash, context);
+        // delete global reference
+        (*env)->DeleteGlobalRef(env, obj);
+    }
+#endif
+
+out:
+    jm->result_ready = 1;
+}
+
+#define VPPJNI_DEBUG_COUNTERS 0
+
+static void vl_api_vnet_interface_counters_t_handler
+(vl_api_vnet_interface_counters_t *mp)
+{
+    vppjni_main_t *jm = &vppjni_main;
+    CLIB_UNUSED(char *counter_name);
+    u32 count, sw_if_index;
+    int i;
+    static sw_interface_stats_t empty_stats = {0, };
+
+    vppjni_lock (jm, 12);
+    count = ntohl (mp->count);
+    sw_if_index = ntohl (mp->first_sw_if_index);
+    if (mp->is_combined == 0) {
+        u64 * vp, v;
+        vp = (u64 *) mp->data;
+
+        for (i = 0; i < count; i++) {
+            sw_interface_details_t *sw_if = NULL;
+
+            v = clib_mem_unaligned (vp, u64);
+            v = clib_net_to_host_u64 (v);
+            vp++;
+
+            if (sw_if_index < vec_len(jm->sw_if_table))
+                sw_if = vec_elt_at_index(jm->sw_if_table, sw_if_index);
+
+            if (sw_if /* && (sw_if->admin_up_down == 1)*/ && sw_if->interface_name[0] != 0) {
+                vec_validate_init_empty(jm->sw_if_stats_by_sw_if_index, sw_if_index, empty_stats);
+                sw_interface_stats_t * s = vec_elt_at_index(jm->sw_if_stats_by_sw_if_index, sw_if_index);
+
+                s->sw_if_index = sw_if_index;
+                s->valid = 1;
+
+                switch (mp->vnet_counter_type) {
+                    case  VNET_INTERFACE_COUNTER_DROP:
+                        counter_name = "drop";
+                        s->rx.pkts.discard = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_PUNT:
+                        counter_name = "punt";
+                        s->rx.pkts.unknown_proto = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_IP4:
+                        counter_name = "ip4";
+                        s->rx.pkts.ip4 = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_IP6:
+                        counter_name = "ip6";
+                        s->rx.pkts.ip6 = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_RX_NO_BUF:
+                        counter_name = "rx-no-buf";
+                        s->rx.pkts.fifo_full = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_RX_MISS:
+                        counter_name = "rx-miss";
+                        s->rx.pkts.miss = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_RX_ERROR:
+                        counter_name = "rx-error";
+                        s->rx.pkts.error = v;
+                        break;
+                    case  VNET_INTERFACE_COUNTER_TX_ERROR:
+                        counter_name = "tx-error (fifo-full)";
+                        s->tx.pkts.fifo_full = v;
+                        break;
+                    default:
+                        counter_name = "bogus";
+                        break;
+                }
+
+#if VPPJNI_DEBUG_COUNTERS == 1
+                clib_warning ("%s (%d): %s (%lld)\n", sw_if->interface_name, s->sw_if_index,
+                        counter_name, v);
+#endif
+            }
+            sw_if_index++;
+        }
+    } else {
+        vlib_counter_t *vp;
+        u64 packets, bytes;
+        vp = (vlib_counter_t *) mp->data;
+
+        for (i = 0; i < count; i++) {
+            sw_interface_details_t *sw_if = NULL;
+
+            packets = clib_mem_unaligned (&vp->packets, u64);
+            packets = clib_net_to_host_u64 (packets);
+            bytes = clib_mem_unaligned (&vp->bytes, u64);
+            bytes = clib_net_to_host_u64 (bytes);
+            vp++;
+
+            if (sw_if_index < vec_len(jm->sw_if_table))
+                sw_if = vec_elt_at_index(jm->sw_if_table, sw_if_index);
+
+            if (sw_if /* && (sw_if->admin_up_down == 1) */ && sw_if->interface_name[0] != 0) {
+                vec_validate_init_empty(jm->sw_if_stats_by_sw_if_index, sw_if_index, empty_stats);
+                sw_interface_stats_t * s = vec_elt_at_index(jm->sw_if_stats_by_sw_if_index, sw_if_index);
+
+                s->valid = 1;
+                s->sw_if_index = sw_if_index;
+
+                switch (mp->vnet_counter_type) {
+                    case  VNET_INTERFACE_COUNTER_RX:
+                        s->rx.pkts.unicast = packets;
+                        s->rx.octets = bytes;
+                        counter_name = "rx";
+                        break;
+
+                    case  VNET_INTERFACE_COUNTER_TX:
+                        s->tx.pkts.unicast = packets;
+                        s->tx.octets = bytes;
+                        counter_name = "tx";
+                        break;
+
+                    default:
+                        counter_name = "bogus";
+                        break;
+                }
+
+#if VPPJNI_DEBUG_COUNTERS == 1
+                clib_warning ("%s (%d): %s.packets %lld\n",
+                        sw_if->interface_name,
+                        sw_if_index, counter_name, packets);
+                clib_warning ("%s (%d): %s.bytes %lld\n",
+                        sw_if->interface_name,
+                        sw_if_index, counter_name, bytes);
+#endif
+            }
+            sw_if_index++;
+        }
+    }
+    vppjni_unlock (jm);
+}
+
+jint JNI_OnLoad(JavaVM *vm, void *reserved) {
+    vppjni_main_t * jm = &vppjni_main;
+    JNIEnv* env;
+    if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_6) != JNI_OK) {
+        return JNI_ERR;
+    }
+
+    if (vppjni_init(env) != 0) {
+        return JNI_ERR;
+    }
+
+    jm->jvm = vm;
+    return JNI_VERSION_1_6;
+}
+
+void JNI_OnUnload(JavaVM *vm, void *reserved) {
+    vppjni_main_t * jm = &vppjni_main;
+    JNIEnv* env;
+    if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_6) != JNI_OK) {
+        return;
+    }
+
+    vppjni_uninit(env);
+
+    jm->jenv = NULL;
+    jm->jvm = NULL;
+}
+
+#define foreach_vpe_api_msg                             \
+_(CONTROL_PING_REPLY, control_ping_reply)               \
+_(SW_INTERFACE_DETAILS, sw_interface_details)           \
+_(SHOW_VERSION_REPLY, show_version_reply)               \
+_(WANT_STATS_REPLY, want_stats_reply)                   \
+_(VNET_INTERFACE_COUNTERS, vnet_interface_counters)     \
+_(SW_INTERFACE_SET_FLAGS, sw_interface_set_flags)       \
+_(BRIDGE_DOMAIN_DETAILS, bridge_domain_details)         \
+_(BRIDGE_DOMAIN_SW_IF_DETAILS, bridge_domain_sw_if_details) \
+_(L2_FIB_TABLE_ENTRY, l2_fib_table_entry)               \
+_(IP_ADDRESS_DETAILS, ip_address_details)               \
+_(VXLAN_TUNNEL_DETAILS, vxlan_tunnel_details)
+
+static int connect_to_vpe(char *name)
+{
+    vppjni_main_t * jm = &vppjni_main;
+    api_main_t * am = &api_main;
+
+    if (vl_client_connect_to_vlib("/vpe-api", name, 32) < 0)
+        return -1;
+
+    jm->my_client_index = am->my_client_index;
+    jm->vl_input_queue = am->shmem_hdr->vl_input_queue;
+
+#define _(N,n)                                  \
+    vl_msg_api_set_handlers(VL_API_##N, #n,     \
+            vl_api_##n##_t_handler,	            \
+            vl_noop_handler,                    \
+            vl_api_##n##_t_endian,              \
+            vl_api_##n##_t_print,               \
+            sizeof(vl_api_##n##_t), 1);
+    foreach_vpe_api_msg;
+#undef _
+
+    return 0;
+}
+
+/* Format an IP6 address. */
+u8 * format_ip6_address (u8 * s, va_list * args)
+{
+    ip6_address_t * a = va_arg (*args, ip6_address_t *);
+    u32 max_zero_run = 0, this_zero_run = 0;
+    int max_zero_run_index = -1, this_zero_run_index=0;
+    int in_zero_run = 0, i;
+    int last_double_colon = 0;
+
+    /* Ugh, this is a pain. Scan forward looking for runs of 0's */
+    for (i = 0; i < ARRAY_LEN (a->as_u16); i++) {
+        if (a->as_u16[i] == 0) {
+            if (in_zero_run) {
+                this_zero_run++;
+            } else {
+                in_zero_run = 1;
+                this_zero_run =1;
+                this_zero_run_index = i;
+            }
+        } else {
+            if (in_zero_run) {
+                /* offer to compress the biggest run of > 1 zero */
+                if (this_zero_run > max_zero_run && this_zero_run > 1) {
+                    max_zero_run_index = this_zero_run_index;
+                    max_zero_run = this_zero_run;
+                }
+            }
+            in_zero_run = 0;
+            this_zero_run = 0;
+        }
+    }
+
+    if (in_zero_run) {
+        if (this_zero_run > max_zero_run && this_zero_run > 1) {
+            max_zero_run_index = this_zero_run_index;
+            max_zero_run = this_zero_run;
+        }
+    }
+
+    for (i = 0; i < ARRAY_LEN (a->as_u16); i++) {
+        if (i == max_zero_run_index) {
+            s = format (s, "::");
+            i += max_zero_run - 1;
+            last_double_colon = 1;
+        } else {
+            s = format (s, "%s%x",
+                    (last_double_colon || i == 0) ? "" : ":",
+                    clib_net_to_host_u16 (a->as_u16[i]));
+            last_double_colon = 0;
+        }
+    }
+
+    return s;
+}
+
+/* Format an IP4 address. */
+u8 * format_ip4_address (u8 * s, va_list * args)
+{
+    u8 * a = va_arg (*args, u8 *);
+    return format (s, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
+}
+
+