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authorDamjan Marion <damarion@cisco.com>2017-04-13 19:13:47 +0200
committerNeale Ranns <nranns@cisco.com>2017-04-20 15:50:11 +0000
commit5fec1e8b2282f4d3d1d02556020254a84c3b6e3d (patch)
treefff8a2c423c62c736630e3ca2f2e4039ab978c7f /src/vpp-api/pneum/pneum.c
parente9a4034b345c27756ecd4fc150f5e31c2659ca90 (diff)
vpp-api: rename libpneum to libvppapiclient
Change-Id: Ie6d2c769b316b43c40632aa9009c4ff6442cf658 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vpp-api/pneum/pneum.c')
-rw-r--r--src/vpp-api/pneum/pneum.c489
1 files changed, 0 insertions, 489 deletions
diff --git a/src/vpp-api/pneum/pneum.c b/src/vpp-api/pneum/pneum.c
deleted file mode 100644
index 8b34d3e4801..00000000000
--- a/src/vpp-api/pneum/pneum.c
+++ /dev/null
@@ -1,489 +0,0 @@
-/*
- * Copyright (c) 2016 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 <stddef.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <vnet/vnet.h>
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vlibapi/api.h>
-#include <vlibmemory/api.h>
-
-#include <vpp/api/vpe_msg_enum.h>
-
-#include "pneum.h"
-
-/*
- * Asynchronous mode:
- * Client registers a callback. All messages are sent to the callback.
- * Synchronous mode:
- * Client calls blocking read().
- * Clients are expected to collate events on a queue.
- * pneum_write() -> suspends RX thread
- * pneum_read() -> resumes RX thread
- */
-
-#define vl_typedefs /* define message structures */
-#include <vpp/api/vpe_all_api_h.h>
-#undef vl_typedefs
-
-#define vl_endianfun /* define message structures */
-#include <vpp/api/vpe_all_api_h.h>
-#undef vl_endianfun
-
-vlib_main_t vlib_global_main;
-vlib_main_t **vlib_mains;
-
-typedef struct {
- u8 connected_to_vlib;
- pthread_t rx_thread_handle;
- pthread_t timeout_thread_handle;
- pthread_mutex_t queue_lock;
- pthread_cond_t suspend_cv;
- pthread_cond_t resume_cv;
- pthread_mutex_t timeout_lock;
- pthread_cond_t timeout_cv;
- pthread_cond_t timeout_cancel_cv;
- pthread_cond_t terminate_cv;
-} pneum_main_t;
-
-pneum_main_t pneum_main;
-pneum_callback_t pneum_callback;
-u16 read_timeout = 0;
-bool rx_is_running = false;
-
-static void
-init (void)
-{
- pneum_main_t *pm = &pneum_main;
- memset(pm, 0, sizeof(*pm));
- pthread_mutex_init(&pm->queue_lock, NULL);
- pthread_cond_init(&pm->suspend_cv, NULL);
- pthread_cond_init(&pm->resume_cv, NULL);
- pthread_mutex_init(&pm->timeout_lock, NULL);
- pthread_cond_init(&pm->timeout_cv, NULL);
- pthread_cond_init(&pm->timeout_cancel_cv, NULL);
- pthread_cond_init(&pm->terminate_cv, NULL);
-}
-
-static void
-cleanup (void)
-{
- pneum_main_t *pm = &pneum_main;
- pthread_cond_destroy(&pm->suspend_cv);
- pthread_cond_destroy(&pm->resume_cv);
- pthread_cond_destroy(&pm->timeout_cv);
- pthread_cond_destroy(&pm->timeout_cancel_cv);
- pthread_cond_destroy(&pm->terminate_cv);
- pthread_mutex_destroy(&pm->queue_lock);
- pthread_mutex_destroy(&pm->timeout_lock);
- memset (pm, 0, sizeof (*pm));
-}
-
-/*
- * Satisfy external references when -lvlib is not available.
- */
-void vlib_cli_output (struct vlib_main_t * vm, char * fmt, ...)
-{
- clib_warning ("vlib_cli_output called...");
-}
-
-void
-pneum_free (void * msg)
-{
- vl_msg_api_free (msg);
-}
-
-static void
-pneum_api_handler (void *msg)
-{
- u16 id = ntohs(*((u16 *)msg));
- msgbuf_t *msgbuf = (msgbuf_t *)(((u8 *)msg) - offsetof(msgbuf_t, data));
- int l = ntohl(msgbuf->data_len);
- if (l == 0)
- clib_warning("Message ID %d has wrong length: %d\n", id, l);
-
- /* Call Python callback */
- ASSERT(pneum_callback);
- (pneum_callback)(msg, l);
- pneum_free(msg);
-}
-
-static void *
-pneum_rx_thread_fn (void *arg)
-{
- unix_shared_memory_queue_t *q;
- pneum_main_t *pm = &pneum_main;
- api_main_t *am = &api_main;
- uword msg;
-
- q = am->vl_input_queue;
-
- while (1)
- while (!unix_shared_memory_queue_sub(q, (u8 *)&msg, 0))
- {
- u16 id = ntohs(*((u16 *)msg));
- switch (id) {
- case VL_API_RX_THREAD_EXIT:
- vl_msg_api_free((void *) msg);
- /* signal waiting threads that this thread is about to terminate */
- pthread_mutex_lock(&pm->queue_lock);
- pthread_cond_signal(&pm->terminate_cv);
- pthread_mutex_unlock(&pm->queue_lock);
- pthread_exit(0);
- return 0;
- break;
-
- case VL_API_MEMCLNT_RX_THREAD_SUSPEND:
- vl_msg_api_free((void * )msg);
- /* Suspend thread and signal reader */
- pthread_mutex_lock(&pm->queue_lock);
- pthread_cond_signal(&pm->suspend_cv);
- /* Wait for the resume signal */
- pthread_cond_wait (&pm->resume_cv, &pm->queue_lock);
- pthread_mutex_unlock(&pm->queue_lock);
- break;
-
- case VL_API_MEMCLNT_READ_TIMEOUT:
- clib_warning("Received read timeout in async thread\n");
- vl_msg_api_free((void *) msg);
- break;
-
- default:
- pneum_api_handler((void *)msg);
- }
- }
-}
-
-static void *
-pneum_timeout_thread_fn (void *arg)
-{
- vl_api_memclnt_read_timeout_t *ep;
- pneum_main_t *pm = &pneum_main;
- api_main_t *am = &api_main;
- struct timespec ts;
- struct timeval tv;
- u16 timeout;
- int rv;
-
- while (1)
- {
- /* Wait for poke */
- pthread_mutex_lock(&pm->timeout_lock);
- pthread_cond_wait (&pm->timeout_cv, &pm->timeout_lock);
- timeout = read_timeout;
- gettimeofday(&tv, NULL);
- ts.tv_sec = tv.tv_sec + timeout;
- ts.tv_nsec = 0;
- rv = pthread_cond_timedwait (&pm->timeout_cancel_cv,
- &pm->timeout_lock, &ts);
- pthread_mutex_unlock(&pm->timeout_lock);
- if (rv == ETIMEDOUT)
- {
- ep = vl_msg_api_alloc (sizeof (*ep));
- ep->_vl_msg_id = ntohs(VL_API_MEMCLNT_READ_TIMEOUT);
- vl_msg_api_send_shmem(am->vl_input_queue, (u8 *)&ep);
- }
- }
- pthread_exit(0);
-}
-
-void
-pneum_rx_suspend (void)
-{
- api_main_t *am = &api_main;
- pneum_main_t *pm = &pneum_main;
- vl_api_memclnt_rx_thread_suspend_t *ep;
-
- if (!pm->rx_thread_handle) return;
- pthread_mutex_lock(&pm->queue_lock);
- if (rx_is_running)
- {
- ep = vl_msg_api_alloc (sizeof (*ep));
- ep->_vl_msg_id = ntohs(VL_API_MEMCLNT_RX_THREAD_SUSPEND);
- vl_msg_api_send_shmem(am->vl_input_queue, (u8 *)&ep);
- /* Wait for RX thread to tell us it has suspendend */
- pthread_cond_wait(&pm->suspend_cv, &pm->queue_lock);
- rx_is_running = false;
- }
- pthread_mutex_unlock(&pm->queue_lock);
-}
-
-void
-pneum_rx_resume (void)
-{
- pneum_main_t *pm = &pneum_main;
- if (!pm->rx_thread_handle) return;
- pthread_mutex_lock(&pm->queue_lock);
- if (rx_is_running) goto unlock;
- pthread_cond_signal(&pm->resume_cv);
- rx_is_running = true;
- unlock:
- pthread_mutex_unlock(&pm->queue_lock);
-}
-
-static uword *
-pneum_msg_table_get_hash (void)
-{
- api_main_t *am = &api_main;
- return (am->msg_index_by_name_and_crc);
-}
-
-int
-pneum_msg_table_size(void)
-{
- api_main_t *am = &api_main;
- return hash_elts(am->msg_index_by_name_and_crc);
-}
-
-int
-pneum_connect (char * name, char * chroot_prefix, pneum_callback_t cb,
- int rx_qlen)
-{
- int rv = 0;
- pneum_main_t *pm = &pneum_main;
-
- init();
- if (chroot_prefix != NULL)
- vl_set_memory_root_path (chroot_prefix);
-
- if ((rv = vl_client_api_map("/vpe-api"))) {
- clib_warning ("vl_client_api map rv %d", rv);
- return rv;
- }
-
- if (vl_client_connect(name, 0, rx_qlen) < 0) {
- vl_client_api_unmap();
- return (-1);
- }
-
- if (cb) {
- /* Start the rx queue thread */
- rv = pthread_create(&pm->rx_thread_handle, NULL, pneum_rx_thread_fn, 0);
- if (rv) {
- clib_warning("pthread_create returned %d", rv);
- vl_client_api_unmap();
- return (-1);
- }
- pneum_callback = cb;
- rx_is_running = true;
- }
-
- /* Start read timeout thread */
- rv = pthread_create(&pm->timeout_thread_handle, NULL,
- pneum_timeout_thread_fn, 0);
- if (rv) {
- clib_warning("pthread_create returned %d", rv);
- vl_client_api_unmap();
- return (-1);
- }
-
- pm->connected_to_vlib = 1;
-
- return (0);
-}
-
-int
-pneum_disconnect (void)
-{
- api_main_t *am = &api_main;
- pneum_main_t *pm = &pneum_main;
-
- if (!pm->connected_to_vlib) return 0;
-
- if (pm->rx_thread_handle) {
- vl_api_rx_thread_exit_t *ep;
- uword junk;
- 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);
-
- /* wait (with timeout) until RX thread has finished */
- struct timespec ts;
- struct timeval tv;
- gettimeofday(&tv, NULL);
- ts.tv_sec = tv.tv_sec + 5;
- ts.tv_nsec = 0;
- pthread_mutex_lock(&pm->queue_lock);
- int rv = pthread_cond_timedwait(&pm->terminate_cv, &pm->queue_lock, &ts);
- pthread_mutex_unlock(&pm->queue_lock);
- /* now join so we wait until thread has -really- finished */
- if (rv == ETIMEDOUT)
- pthread_cancel(pm->rx_thread_handle);
- else
- pthread_join(pm->rx_thread_handle, (void **) &junk);
- }
- if (pm->timeout_thread_handle)
- pthread_cancel(pm->timeout_thread_handle);
-
- vl_client_disconnect();
- vl_client_api_unmap();
- pneum_callback = 0;
-
- cleanup();
-
- return (0);
-}
-
-static void
-set_timeout (unsigned short timeout)
-{
- pneum_main_t *pm = &pneum_main;
- pthread_mutex_lock(&pm->timeout_lock);
- read_timeout = timeout;
- pthread_cond_signal(&pm->timeout_cv);
- pthread_mutex_unlock(&pm->timeout_lock);
-}
-
-static void
-unset_timeout (void)
-{
- pneum_main_t *pm = &pneum_main;
- pthread_mutex_lock(&pm->timeout_lock);
- pthread_cond_signal(&pm->timeout_cancel_cv);
- pthread_mutex_unlock(&pm->timeout_lock);
-}
-
-int
-pneum_read (char **p, int *l, u16 timeout)
-{
- unix_shared_memory_queue_t *q;
- api_main_t *am = &api_main;
- pneum_main_t *pm = &pneum_main;
- uword msg;
- msgbuf_t *msgbuf;
-
- if (!pm->connected_to_vlib) return -1;
-
- *l = 0;
-
- if (am->our_pid == 0) return (-1);
-
- /* Poke timeout thread */
- if (timeout)
- set_timeout(timeout);
-
- q = am->vl_input_queue;
- int rv = unix_shared_memory_queue_sub(q, (u8 *)&msg, 0);
- if (rv == 0) {
- u16 msg_id = ntohs(*((u16 *)msg));
- switch (msg_id) {
- case VL_API_RX_THREAD_EXIT:
- printf("Received thread exit\n");
- return -1;
- case VL_API_MEMCLNT_RX_THREAD_SUSPEND:
- printf("Received thread suspend\n");
- goto error;
- case VL_API_MEMCLNT_READ_TIMEOUT:
- printf("Received read timeout %ds\n", timeout);
- goto error;
-
- default:
- msgbuf = (msgbuf_t *)(((u8 *)msg) - offsetof(msgbuf_t, data));
- *l = ntohl(msgbuf->data_len);
- if (*l == 0) {
- printf("Unregistered API message: %d\n", msg_id);
- goto error;
- }
- }
- *p = (char *)msg;
-
- /* Let timeout notification thread know we're done */
- unset_timeout();
-
- } else {
- printf("Read failed with %d\n", rv);
- }
- return (rv);
-
- error:
- vl_msg_api_free((void *) msg);
- /* Client might forget to resume RX thread on failure */
- pneum_rx_resume ();
- return -1;
-}
-
-/*
- * XXX: Makes the assumption that client_index is the first member
- */
-typedef VL_API_PACKED(struct _vl_api_header {
- u16 _vl_msg_id;
- u32 client_index;
-}) vl_api_header_t;
-
-static unsigned int
-pneum_client_index (void)
-{
- return (api_main.my_client_index);
-}
-
-int
-pneum_write (char *p, int l)
-{
- int rv = -1;
- api_main_t *am = &api_main;
- vl_api_header_t *mp = vl_msg_api_alloc(l);
- unix_shared_memory_queue_t *q;
- pneum_main_t *pm = &pneum_main;
-
- if (!pm->connected_to_vlib) return -1;
- if (!mp) return (-1);
-
- memcpy(mp, p, l);
- mp->client_index = pneum_client_index();
- q = am->shmem_hdr->vl_input_queue;
- rv = unix_shared_memory_queue_add(q, (u8 *)&mp, 0);
- if (rv != 0) {
- clib_warning("vpe_api_write fails: %d\n", rv);
- /* Clear message */
- pneum_free(mp);
- }
- return (rv);
-}
-
-int
-pneum_get_msg_index (unsigned char * name)
-{
- return vl_api_get_msg_index (name);
-}
-
-int
-pneum_msg_table_max_index(void)
-{
- int max = 0;
- hash_pair_t *hp;
- uword *h = pneum_msg_table_get_hash();
- hash_foreach_pair (hp, h,
- ({
- if (hp->value[0] > max)
- max = hp->value[0];
- }));
-
- return max;
-}
-
-void
-pneum_set_error_handler (pneum_error_callback_t cb)
-{
- if (cb) clib_error_register_handler (cb, 0);
-}