--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * memory_client.c - API message handling, client code.
+ *
+ * Copyright (c) 2010 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.
+ *------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <signal.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <time.h>
+#include <fcntl.h>
+#include <string.h>
+#include <vppinfra/clib.h>
+#include <vppinfra/vec.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/bitmap.h>
+#include <vppinfra/fifo.h>
+#include <vppinfra/time.h>
+#include <vppinfra/mheap.h>
+#include <vppinfra/heap.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/format.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlibmemory/api.h>
+
+#include <vlibmemory/vl_memory_msg_enum.h>
+
+#define vl_typedefs /* define message structures */
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun /* define message structures */
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) clib_warning (__VA_ARGS__)
+#define vl_printfun
+#include <vlibmemory/vl_memory_api_h.h>
+#undef vl_printfun
+
+typedef struct {
+ u8 rx_thread_jmpbuf_valid;
+ u8 connected_to_vlib;
+ jmp_buf rx_thread_jmpbuf;
+ pthread_t rx_thread_handle;
+ /* Plugin message base lookup scheme */
+ volatile u8 first_msg_id_reply_ready;
+ u16 first_msg_id_reply;
+} memory_client_main_t;
+
+memory_client_main_t memory_client_main;
+
+static void *rx_thread_fn(void *arg)
+{
+ unix_shared_memory_queue_t *q;
+ memory_client_main_t *mm = &memory_client_main;
+ api_main_t *am = &api_main;
+
+ q = am->vl_input_queue;
+
+ /* So we can make the rx thread terminate cleanly */
+ if (setjmp(mm->rx_thread_jmpbuf) == 0) {
+ mm->rx_thread_jmpbuf_valid = 1;
+ while (1) {
+ vl_msg_api_queue_handler (q);
+ }
+ }
+ pthread_exit(0);
+}
+
+static void vl_api_rx_thread_exit_t_handler (
+ vl_api_rx_thread_exit_t *mp)
+{
+ memory_client_main_t *mm = &memory_client_main;
+ vl_msg_api_free (mp);
+ longjmp (mm->rx_thread_jmpbuf, 1);
+}
+
+static void noop_handler (void *notused)
+{
+}
+
+#define foreach_api_msg \
+_(RX_THREAD_EXIT, rx_thread_exit)
+
+static int connect_to_vlib_internal (char *svm_name, char *client_name,
+ int rx_queue_size, int want_pthread)
+{
+ int rv=0;
+ memory_client_main_t *mm = &memory_client_main;
+
+ if ((rv = vl_client_api_map(svm_name))) {
+ clib_warning ("vl_client_api map rv %d", rv);
+ return rv;
+ }
+
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_api_msg;
+#undef _
+
+ if (vl_client_connect(client_name, 0 /* punt quota */,
+ rx_queue_size /* input queue */) < 0) {
+ vl_client_api_unmap();
+ return -1;
+ }
+
+ /* Start the rx queue thread */
+
+ if (want_pthread) {
+ rv = pthread_create(&mm->rx_thread_handle,
+ NULL /*attr*/, rx_thread_fn, 0);
+ if (rv)
+ clib_warning("pthread_create returned %d", rv);
+ }
+
+ mm->connected_to_vlib = 1;
+ return 0;
+}
+
+int vl_client_connect_to_vlib(char *svm_name, char *client_name,
+ int rx_queue_size)
+{
+ return connect_to_vlib_internal (svm_name, client_name, rx_queue_size,
+ 1 /* want pthread */);
+}
+
+int vl_client_connect_to_vlib_no_rx_pthread (char *svm_name, char *client_name,
+ int rx_queue_size)
+{
+ return connect_to_vlib_internal (svm_name, client_name, rx_queue_size,
+ 0 /* want pthread */);
+}
+
+void vl_client_disconnect_from_vlib (void)
+{
+ memory_client_main_t *mm = &memory_client_main;
+ api_main_t *am = &api_main;
+ uword junk;
+
+ if (mm->rx_thread_jmpbuf_valid) {
+ vl_api_rx_thread_exit_t *ep;
+ ep = vl_msg_api_alloc (sizeof (*ep));
+ ep->_vl_msg_id = ntohs(VL_API_RX_THREAD_EXIT);
+ vl_msg_api_send_shmem (am->vl_input_queue, (u8 *)&ep);
+ pthread_join (mm->rx_thread_handle, (void **) &junk);
+ }
+ if (mm->connected_to_vlib) {
+ vl_client_disconnect();
+ vl_client_api_unmap();
+ }
+ memset (mm, 0, sizeof (*mm));
+}
+
+static void vl_api_get_first_msg_id_reply_t_handler
+(vl_api_get_first_msg_id_reply_t * mp)
+{
+ memory_client_main_t *mm = &memory_client_main;
+ i32 retval = ntohl(mp->retval);
+
+ mm->first_msg_id_reply = (retval >= 0) ? ntohs(mp->first_msg_id) : ~0;
+ mm->first_msg_id_reply_ready = 1;
+}
+
+u16 vl_client_get_first_plugin_msg_id (char * plugin_name)
+{
+ vl_api_get_first_msg_id_t * mp;
+ api_main_t * am = &api_main;
+ memory_client_main_t * mm = &memory_client_main;
+ f64 timeout;
+ void * old_handler;
+ clib_time_t clib_time;
+ u16 rv = ~0;
+
+ if (strlen(plugin_name) + 1 > sizeof (mp->name))
+ return (rv);
+
+ memset (&clib_time, 0, sizeof (clib_time));
+ clib_time_init (&clib_time);
+
+ /* Push this plugin's first_msg_id_reply handler */
+ old_handler = am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY];
+ am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = (void *)
+ vl_api_get_first_msg_id_reply_t_handler;
+
+ /* Ask the data-plane for the message-ID base of the indicated plugin */
+ mm->first_msg_id_reply_ready = 0;
+
+ mp = vl_msg_api_alloc (sizeof(*mp));
+ memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = ntohs(VL_API_GET_FIRST_MSG_ID);
+ mp->client_index = am->my_client_index;
+ strncpy ((char *) mp->name, plugin_name, sizeof (mp->name) - 1);
+
+ vl_msg_api_send_shmem (am->shmem_hdr->vl_input_queue, (u8 *)&mp);
+
+ /* Synchronously wait for the answer */
+ do {
+ timeout = clib_time_now (&clib_time) + 1.0;
+
+ while (clib_time_now (&clib_time) < timeout) {
+ if (mm->first_msg_id_reply_ready == 1) {
+ rv = mm->first_msg_id_reply;
+ goto result;
+ }
+ }
+ /* Restore old handler */
+ am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler;
+
+ return rv;
+ } while(0);
+
+result:
+
+ /* Restore the old handler */
+ am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler;
+
+ if (rv == (u16) ~0)
+ clib_warning ("plugin '%s' not registered", plugin_name);
+
+ return rv;
+}
Code Review / vpp.git / blobdiff