+++ /dev/null
-/*
- * 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 <setjmp.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"
-
-#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 rx_thread_jmpbuf_valid;
- u8 connected_to_vlib;
- jmp_buf rx_thread_jmpbuf;
- pthread_t rx_thread_handle;
-} pneum_main_t;
-
-pneum_main_t pneum_main;
-
-pneum_callback_t pneum_callback;
-
-/*
- * 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));
- if (id == VL_API_RX_THREAD_EXIT) {
- pneum_main_t *pm = &pneum_main;
- vl_msg_api_free(msg);
- longjmp(pm->rx_thread_jmpbuf, 1);
- }
- 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;
-
- /* So we can make the rx thread terminate cleanly */
- if (setjmp(pm->rx_thread_jmpbuf) == 0) {
- pm->rx_thread_jmpbuf_valid = 1;
- while (1)
- while (!unix_shared_memory_queue_sub(q, (u8 *)&msg, 0))
- pneum_api_handler((void *)msg);
- }
- pthread_exit(0);
-}
-
-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 rv = 0;
- pneum_main_t *pm = &pneum_main;
-
- 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, 32) < 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;
- }
-
- 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->rx_thread_jmpbuf_valid) {
- 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);
- pthread_join(pm->rx_thread_handle, (void **) &junk);
- }
- if (pm->connected_to_vlib) {
- vl_client_disconnect();
- vl_client_api_unmap();
- pneum_callback = 0;
- }
- memset (pm, 0, sizeof (*pm));
-
- return (0);
-}
-
-int
-pneum_read (char **p, int *l)
-{
- unix_shared_memory_queue_t *q;
- api_main_t *am = &api_main;
- pneum_main_t *pm = &pneum_main;
- uword msg;
-
- if (!pm->connected_to_vlib) return -1;
-
- *l = 0;
-
- if (am->our_pid == 0) return (-1);
-
- 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));
- msgbuf_t *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);
- return (-1);
- }
- *p = (char *)msg;
- } else {
- printf("Read failed with %d\n", rv);
- }
- return (rv);
-}
-
-/*
- * 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) {
- printf("vpe_api_write fails: %d\n", rv);
- /* Clear message */
- pneum_free(mp);
- }
- return (rv);
-}
-
-uint32_t
-pneum_get_msg_index (unsigned char * name)
-{
- return vl_api_get_msg_index (name);
-}
Code Review / vpp.git / blobdiff