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/*
* 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.
*/
/*
* unix.h: Unix specific main state
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef included_unix_unix_h
#define included_unix_unix_h
#include <vppinfra/socket.h>
struct unix_file;
typedef clib_error_t * (unix_file_function_t) (struct unix_file * f);
typedef struct unix_file {
/* Unix file descriptor from open/socket. */
u32 file_descriptor;
u32 flags;
#define UNIX_FILE_DATA_AVAILABLE_TO_WRITE (1 << 0)
/* Data available for function's use. */
uword private_data;
/* Functions to be called when read/write data becomes ready. */
unix_file_function_t * read_function, * write_function, * error_function;
} unix_file_t;
typedef struct {
f64 time;
clib_error_t * error;
} unix_error_history_t;
typedef enum {
UNIX_FILE_UPDATE_ADD,
UNIX_FILE_UPDATE_MODIFY,
UNIX_FILE_UPDATE_DELETE,
} unix_file_update_type_t;
typedef struct {
/* Back pointer to main structure. */
vlib_main_t * vlib_main;
u32 flags;
/* Run interactively or as daemon (background process). */
#define UNIX_FLAG_INTERACTIVE (1 << 0)
#define UNIX_FLAG_NODAEMON (1 << 1)
/* Pool of files to poll for input/output. */
unix_file_t * file_pool;
/* CLI listen socket. */
clib_socket_t cli_listen_socket;
void (* file_update) (unix_file_t * file, unix_file_update_type_t update_type);
/* Circular buffer of last unix errors. */
unix_error_history_t error_history[128];
u32 error_history_index;
u64 n_total_errors;
/* startup-config filename */
u8 *startup_config_filename;
/* unix config complete */
volatile int unix_config_complete;
/* CLI log file. GIGO. */
u8 *log_filename;
int log_fd;
/* Don't put telnet connections into character mode */
int cli_line_mode;
u32 cli_history_limit;
} unix_main_t;
/* Global main structure. */
extern unix_main_t unix_main;
always_inline uword
unix_file_add (unix_main_t * um, unix_file_t * template)
{
unix_file_t * f;
pool_get (um->file_pool, f);
f[0] = template[0];
um->file_update (f, UNIX_FILE_UPDATE_ADD);
return f - um->file_pool;
}
always_inline void
unix_file_del (unix_main_t * um, unix_file_t * f)
{
um->file_update (f, UNIX_FILE_UPDATE_DELETE);
close (f->file_descriptor);
f->file_descriptor = ~0;
pool_put (um->file_pool, f);
}
always_inline uword
unix_file_set_data_available_to_write (u32 unix_file_index, uword is_available)
{
unix_file_t * uf = pool_elt_at_index (unix_main.file_pool, unix_file_index);
uword was_available = (uf->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE);
if ((was_available != 0) != (is_available != 0))
{
uf->flags ^= UNIX_FILE_DATA_AVAILABLE_TO_WRITE;
unix_main.file_update (uf, UNIX_FILE_UPDATE_MODIFY);
}
return was_available != 0;
}
always_inline void
unix_save_error (unix_main_t * um, clib_error_t * error)
{
unix_error_history_t * eh = um->error_history + um->error_history_index;
clib_error_free_vector (eh->error);
eh->error = error;
eh->time = vlib_time_now (um->vlib_main);
um->n_total_errors += 1;
if (++um->error_history_index >= ARRAY_LEN (um->error_history))
um->error_history_index = 0;
}
/* Main function for Unix VLIB. */
int vlib_unix_main (int argc, char * argv[]);
/* Call to allocate/initialize physical DMA memory subsystem.
This is not an init function so that users can explicitly enable/disable
physmem when its not needed. */
clib_error_t * unix_physmem_init (vlib_main_t * vm,
int fail_if_physical_memory_not_present);
/* Set prompt for CLI. */
void vlib_unix_cli_set_prompt (char * prompt);
static inline unix_main_t * vlib_unix_get_main (void)
{
return &unix_main;
}
/* thread stack array; vec_len = max number of threads */
u8 **vlib_thread_stacks;
#endif /* included_unix_unix_h */
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