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/*
*------------------------------------------------------------------
* socket_client.c - API message handling over sockets, client code.
*
* Copyright (c) 2017 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
socket_client_main_t socket_client_main;
/* Debug aid */
u32 vl (void *p) __attribute__ ((weak));
u32
vl (void *p)
{
return vec_len (p);
}
void
vl_socket_client_read_reply (socket_client_main_t * scm)
{
int n, current_rx_index;
msgbuf_t *mbp;
if (scm->socket_fd == 0 || scm->socket_enable == 0)
return;
mbp = 0;
while (1)
{
current_rx_index = vec_len (scm->socket_rx_buffer);
while (vec_len (scm->socket_rx_buffer) <
sizeof (*mbp) + 2 /* msg id */ )
{
vec_validate (scm->socket_rx_buffer, current_rx_index
+ scm->socket_buffer_size - 1);
_vec_len (scm->socket_rx_buffer) = current_rx_index;
n = read (scm->socket_fd, scm->socket_rx_buffer + current_rx_index,
scm->socket_buffer_size);
if (n < 0)
{
clib_unix_warning ("socket_read");
return;
}
_vec_len (scm->socket_rx_buffer) += n;
}
#if CLIB_DEBUG > 1
if (n > 0)
clib_warning ("read %d bytes", n);
#endif
if (mbp == 0)
mbp = (msgbuf_t *) (scm->socket_rx_buffer);
if (vec_len (scm->socket_rx_buffer) >= ntohl (mbp->data_len)
+ sizeof (*mbp))
{
vl_msg_api_socket_handler ((void *) (mbp->data));
if (vec_len (scm->socket_rx_buffer) == ntohl (mbp->data_len)
+ sizeof (*mbp))
_vec_len (scm->socket_rx_buffer) = 0;
else
vec_delete (scm->socket_rx_buffer, ntohl (mbp->data_len)
+ sizeof (*mbp), 0);
mbp = 0;
/* Quit if we're out of data, and not expecting a ping reply */
if (vec_len (scm->socket_rx_buffer) == 0
&& scm->control_pings_outstanding == 0)
break;
}
}
}
int
vl_socket_client_connect (socket_client_main_t * scm, char *socket_path,
char *client_name, u32 socket_buffer_size)
{
char buffer[256];
char *rdptr;
int n, total_bytes;
vl_api_sockclnt_create_reply_t *rp;
vl_api_sockclnt_create_t *mp;
clib_socket_t *sock = &scm->client_socket;
msgbuf_t *mbp;
clib_error_t *error;
/* Already connected? */
if (scm->socket_fd)
return (-2);
/* bogus call? */
if (socket_path == 0 || client_name == 0)
return (-3);
sock->config = socket_path;
sock->flags = CLIB_SOCKET_F_IS_CLIENT | CLIB_SOCKET_F_SEQPACKET;
error = clib_socket_init (sock);
if (error)
{
clib_error_report (error);
return (-1);
}
scm->socket_fd = sock->fd;
mbp = (msgbuf_t *) buffer;
mbp->q = 0;
mbp->data_len = ntohl (sizeof (*mp));
mbp->gc_mark_timestamp = 0;
mp = (vl_api_sockclnt_create_t *) mbp->data;
mp->_vl_msg_id = ntohs (VL_API_SOCKCLNT_CREATE);
strncpy ((char *) mp->name, client_name, sizeof (mp->name) - 1);
mp->name[sizeof (mp->name) - 1] = 0;
mp->context = 0xfeedface;
n = write (scm->socket_fd, mbp, sizeof (*mbp) + ntohl (mbp->data_len));
if (n < 0)
{
clib_unix_warning ("socket write (msg)");
return (-1);
}
memset (buffer, 0, sizeof (buffer));
total_bytes = 0;
rdptr = buffer;
do
{
n = read (scm->socket_fd, rdptr, sizeof (buffer) - (rdptr - buffer));
if (n < 0)
{
clib_unix_warning ("socket read");
}
total_bytes += n;
rdptr += n;
}
while (total_bytes < sizeof (vl_api_sockclnt_create_reply_t)
+ sizeof (msgbuf_t));
rp = (vl_api_sockclnt_create_reply_t *) (buffer + sizeof (msgbuf_t));
if (ntohs (rp->_vl_msg_id) != VL_API_SOCKCLNT_CREATE_REPLY)
{
clib_warning ("connect reply got msg id %d\n", ntohs (rp->_vl_msg_id));
return (-1);
}
/* allocate tx, rx buffers */
scm->socket_buffer_size = socket_buffer_size ? socket_buffer_size :
SOCKET_CLIENT_DEFAULT_BUFFER_SIZE;
vec_validate (scm->socket_tx_buffer, scm->socket_buffer_size - 1);
vec_validate (scm->socket_rx_buffer, scm->socket_buffer_size - 1);
_vec_len (scm->socket_rx_buffer) = 0;
scm->socket_enable = 1;
return (0);
}
void
vl_socket_client_disconnect (socket_client_main_t * scm)
{
if (scm->socket_fd && (close (scm->socket_fd) < 0))
clib_unix_warning ("close");
scm->socket_fd = 0;
}
void
vl_socket_client_enable_disable (socket_client_main_t * scm, int enable)
{
scm->socket_enable = enable;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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