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at_device/class/sim76xx/at_socket_sim76xx.c

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/*
* File : at_socket_sim76xx.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2018-12-22 thomasonegd first version
* 2019-03-06 thomasonegd fix udp connection.
* 2019-03-08 thomasonegd add power_on & power_off api
* 2019-05-14 chenyong multi AT socket client support
* 2019-08-24 chenyong add netdev support
*/
#include <stdio.h>
#include <string.h>
#include <at_device_sim76xx.h>
#define LOG_TAG "at.skt.sim76"
#include <at_log.h>
#ifdef AT_DEVICE_USING_SIM76XX
#define SIM76XX_MODULE_SEND_MAX_SIZE 1500
#define SIM76XX_MAX_CONNECTIONS 10
#define SIM76XX_IPADDR_LEN 16
/* set real event by current socket and current state */
#define SET_EVENT(socket, event) (((socket + 1) << 16) | (event))
/* AT socket event type */
#define SIM76XX_EVENT_CONN_OK (1L << 0)
#define SIM76XX_EVENT_SEND_OK (1L << 1)
#define SIM76XX_EVENT_RECV_OK (1L << 2)
#define SIM76XX_EVNET_CLOSE_OK (1L << 3)
#define SIM76XX_EVENT_CONN_FAIL (1L << 4)
#define SIM76XX_EVENT_SEND_FAIL (1L << 5)
static at_evt_cb_t at_evt_cb_set[] =
{
[AT_SOCKET_EVT_RECV] = NULL,
[AT_SOCKET_EVT_CLOSED] = NULL,
};
static char udp_ipstr[SIM76XX_MAX_CONNECTIONS][SIM76XX_IPADDR_LEN] = {0};
static int udp_port[SIM76XX_MAX_CONNECTIONS] = {0};
/* unsolicited TCP/IP command<err> codes */
static void at_tcp_ip_errcode_parse(int result)
{
switch(result)
{
case 0 : LOG_D("%d : operation succeeded ", result); break;
case 1 : LOG_E("%d : UNetwork failure", result); break;
case 2 : LOG_E("%d : Network not opened", result); break;
case 3 : LOG_E("%d : Wrong parameter", result); break;
case 4 : LOG_D("%d : Operation not supported", result); break;
case 5 : LOG_E("%d : Failed to create socket", result); break;
case 6 : LOG_E("%d : Failed to bind socket", result); break;
case 7 : LOG_E("%d : TCP server is already listening", result); break;
case 8 : LOG_E("%d : Busy", result); break;
case 9 : LOG_E("%d : Sockets opened", result); break;
case 10 : LOG_E("%d : Timeout ", result); break;
case 11 : LOG_E("%d : DNS parse failed for AT+CIPOPEN", result); break;
case 255 : LOG_E("%d : Unknown error", result); break;
}
}
static int sim76xx_socket_event_send(struct at_device *device, uint32_t event)
{
return (int)rt_event_send(device->socket_event, event);
}
static int sim76xx_socket_event_recv(struct at_device *device, uint32_t event, uint32_t timeout, rt_uint8_t option)
{
int result = RT_EOK;
rt_uint32_t recved;
result = rt_event_recv(device->socket_event, event, option | RT_EVENT_FLAG_CLEAR, timeout, &recved);
if (result != RT_EOK)
{
return -RT_ETIMEOUT;
}
return recved;
}
/**
* close socket by AT commands.
*
* @param current socket
*
* @return 0: close socket success
* -1: send AT commands error
* -2: wait socket event timeout
* -5: no memory
*/
static int sim76xx_socket_close(struct at_socket *socket)
{
int result = RT_EOK;
int lnk_stat[10] = {0};
at_response_t resp = RT_NULL;
int device_socket = (int) socket->user_data;
struct at_device *device = (struct at_device *) socket->device;
resp = at_create_resp(64, 0, RT_TICK_PER_SECOND);
if (resp == RT_NULL)
{
LOG_E("no memory for resp create.");
return -RT_ENOMEM;
}
rt_thread_mdelay(100);
/* check socket link_state */
if (at_obj_exec_cmd(device->client, resp, "AT+CIPCLOSE?") < 0)
{
result = -RT_ERROR;
goto __exit;
}
if (at_resp_parse_line_args_by_kw(resp, "+CIPCLOSE:", "+CIPCLOSE: %d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
&lnk_stat[0], &lnk_stat[1], &lnk_stat[2], &lnk_stat[3], &lnk_stat[4],
&lnk_stat[5], &lnk_stat[6], &lnk_stat[7], &lnk_stat[8], &lnk_stat[9]) < 0)
{
result = -RT_ERROR;
goto __exit;
}
if (lnk_stat[device_socket])
{
#define CLOSE_COUNTS 5
int i = 0;
/* close tcp or udp socket if connected */
if (at_obj_exec_cmd(device->client, resp, "AT+CIPCLOSE=%d", device_socket) < 0)
{
result = -RT_ERROR;
goto __exit;
}
/* wait sim76xx device sockt closed */
for (i = 0; i < CLOSE_COUNTS; i++)
{
if (at_obj_exec_cmd(device->client, resp, "AT+CIPCLOSE?") < 0)
{
result = -RT_ERROR;
goto __exit;
}
at_resp_parse_line_args_by_kw(resp, "+CIPCLOSE:", "+CIPCLOSE: %d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
&lnk_stat[0], &lnk_stat[1], &lnk_stat[2], &lnk_stat[3], &lnk_stat[4],
&lnk_stat[5], &lnk_stat[6], &lnk_stat[7], &lnk_stat[8], &lnk_stat[9]);
if (lnk_stat[device_socket] == 0)
{
break;
}
rt_thread_delay(1000);
}
}
__exit:
if (resp)
{
at_delete_resp(resp);
}
return result;
}
/**
* create TCP/UDP client or server connect by AT commands.
*
* @param socket current socket
* @param ip server or client IP address
* @param port server or client port
* @param type connect socket type(tcp, udp)
* @param is_client connection is client
*
* @return 0: connect success
* -1: connect failed, send commands error or type error
* -2: wait socket event timeout
* -5: no memory
*/
static int sim76xx_socket_connect(struct at_socket *socket, char *ip, int32_t port, enum at_socket_type type, rt_bool_t is_client)
{
int result = RT_EOK, event_result = 0;
rt_bool_t retryed = RT_FALSE;
at_response_t resp = RT_NULL;
int device_socket = (int) socket->user_data;
struct at_device *device = (struct at_device *) socket->device;
rt_mutex_t lock = device->client->lock;
RT_ASSERT(ip);
RT_ASSERT(port >= 0);
resp = at_create_resp(128, 0, 5 * RT_TICK_PER_SECOND);
if (resp == RT_NULL)
{
LOG_E("no memory for resp create.");
return -RT_ENOMEM;
}
rt_mutex_take(lock, RT_WAITING_FOREVER);
/* check and close current socket */
sim76xx_socket_close(socket);
__retry:
if (is_client)
{
switch (type)
{
case AT_SOCKET_TCP:
/* send AT commands to connect TCP server */
if (at_obj_exec_cmd(device->client, resp, "AT+CIPOPEN=%d,\"TCP\",\"%s\",%d", device_socket, ip, port) < 0)
{
result = -RT_ERROR;
}
break;
case AT_SOCKET_UDP:
if (at_obj_exec_cmd(device->client, resp, "AT+CIPOPEN=%d,\"UDP\",,,%d", device_socket, port) < 0)
{
result = -RT_ERROR;
}
rt_strncpy(udp_ipstr[device_socket], ip, SIM76XX_IPADDR_LEN);
udp_port[device_socket] = port;
break;
default:
LOG_E("not supported connect type : %d.", type);
result = -RT_ERROR;
goto __exit;
}
}
/* waiting result event from AT URC, the device default connection timeout is 75 seconds, but it set to 10 seconds is convenient to use.*/
if (sim76xx_socket_event_recv(device, SET_EVENT(device_socket, 0), 10 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
{
LOG_E("%s device socket(%d) wait connect result timeout.", device->name, device_socket);
result = -RT_ETIMEOUT;
goto __exit;
}
/* waiting OK or failed result */
event_result = sim76xx_socket_event_recv(device, SIM76XX_EVENT_CONN_OK | SIM76XX_EVENT_CONN_FAIL,
1 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
if (event_result < 0)
{
LOG_E("%s device socket(%d) wait connect OK|FAIL timeout.", device->name, device_socket);
result = -RT_ETIMEOUT;
goto __exit;
}
/* check result */
if (event_result & SIM76XX_EVENT_CONN_FAIL)
{
if (retryed == RT_FALSE)
{
LOG_D("socket(%d) connect failed, the socket was not be closed and now will connect retry.", device_socket);
if (sim76xx_socket_close(socket) < 0)
{
result = -RT_ERROR;
goto __exit;
}
retryed = RT_TRUE;
goto __retry;
}
LOG_E("%s device socket(%d) connect failed.", device->name, device_socket);
result = -RT_ERROR;
goto __exit;
}
__exit:
rt_mutex_release(lock);
if (resp)
{
at_delete_resp(resp);
}
return result;
}
/**
* send data to server or client by AT commands.
*
* @param socket current socket
* @param buff send buffer
* @param bfsz send buffer size
* @param type connect socket type(tcp, udp)
*
* @return >=0: the size of send success
* -1: send AT commands error or send data error
* -2: waited socket event timeout
* -5: no memory
*/
static int sim76xx_socket_send(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type)
{
int result = RT_EOK;
int event_result = 0;
size_t cur_pkt_size = 0, sent_size = 0;
at_response_t resp = RT_NULL;
int device_socket = (int) socket->user_data;
struct at_device *device = (struct at_device *) socket->device;
struct at_device_sim76xx *sim76xx = (struct at_device_sim76xx *) device->user_data;
rt_mutex_t lock = device->client->lock;
RT_ASSERT(buff);
RT_ASSERT(bfsz > 0);
resp = at_create_resp(128, 2, 5 * RT_TICK_PER_SECOND);
if (resp == RT_NULL)
{
LOG_E("no memory for resp create.");
return -RT_ENOMEM;
}
rt_mutex_take(lock, RT_WAITING_FOREVER);
/* set current socket for send URC event */
sim76xx->user_data = (void *) device_socket;
/* set AT client end sign to deal with '>' sign.*/
at_obj_set_end_sign(device->client, '>');
while (sent_size < bfsz)
{
if (bfsz - sent_size < SIM76XX_MODULE_SEND_MAX_SIZE)
{
cur_pkt_size = bfsz - sent_size;
}
else
{
cur_pkt_size = SIM76XX_MODULE_SEND_MAX_SIZE;
}
switch (socket->type)
{
case AT_SOCKET_TCP:
/* send the "AT+CIPSEND" commands to AT server than receive the '>' response on the first line. */
if (at_obj_exec_cmd(device->client, resp, "AT+CIPSEND=%d,%d", device_socket, cur_pkt_size) < 0)
{
result = -RT_ERROR;
goto __exit;
}
break;
case AT_SOCKET_UDP:
/* send the "AT+CIPSEND" commands to AT server than receive the '>' response on the first line. */
if (at_obj_exec_cmd(device->client, resp, "AT+CIPSEND=%d,%d,\"%s\",%d",
device_socket, cur_pkt_size, udp_ipstr[device_socket], udp_port[device_socket]) < 0)
{
result = -RT_ERROR;
goto __exit;
}
break;
default:
LOG_E("input socket type(%d) error.", socket->type);
break;
}
/* send the real data to server or client */
result = (int) at_client_send(buff + sent_size, cur_pkt_size);
if (result == 0)
{
result = -RT_ERROR;
goto __exit;
}
/* waiting result event from AT URC */
if (sim76xx_socket_event_recv(device, SET_EVENT(device_socket, 0), 5 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
{
LOG_E("%s device socket (%d) wait send result timeout.", device->name, device_socket);
result = -RT_ETIMEOUT;
goto __exit;
}
/* waiting OK or failed result */
event_result = sim76xx_socket_event_recv(device, SIM76XX_EVENT_SEND_OK | SIM76XX_EVENT_SEND_FAIL,
5 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
if (event_result < 0)
{
LOG_E("%s device socket(%d) wait send OK|FAIL timeout.", device->name, device_socket);
result = -RT_ETIMEOUT;
goto __exit;
}
/* check result */
if (event_result & SIM76XX_EVENT_SEND_FAIL)
{
LOG_E("%s device socket(%d) send failed.", device->name, device_socket);
result = -RT_ERROR;
goto __exit;
}
sent_size += cur_pkt_size;
}
__exit:
/* reset the end sign for data */
at_obj_set_end_sign(device->client, 0);
rt_mutex_release(lock);
if (resp)
{
at_delete_resp(resp);
}
return result > 0 ? sent_size : result;
}
/**
* domain resolve by AT commands.
*
* @param name domain name
* @param ip parsed IP address, it's length must be 16
*
* @return 0: domain resolve success
* -2: wait socket event timeout
* -5: no memory
*/
static int sim76xx_domain_resolve(const char *name, char ip[16])
{
#define RESOLVE_RETRY 5
int i, result = RT_EOK;
char domain[32] = {0};
char domain_ip[16] = {0};
at_response_t resp = RT_NULL;
struct at_device *device = RT_NULL;
RT_ASSERT(name);
RT_ASSERT(ip);
device = at_device_get_first_initialized();
if (device == RT_NULL)
{
LOG_E("get first init device failed.");
return -RT_ERROR;
}
resp = at_create_resp(128, 0, 5 * RT_TICK_PER_SECOND);
if (resp == RT_NULL)
{
LOG_E("no memory for resp create.");
return -RT_ENOMEM;
}
for (i = 0; i < RESOLVE_RETRY; i++)
{
if (at_obj_exec_cmd(device->client, resp, "AT+CDNSGIP=\"%s\"", name) < 0)
{
rt_thread_mdelay(200);
/* resolve failed, maybe receive an URC CRLF */
continue;
}
/* parse the third line of response data, get the IP address */
/* +CDNSGIP: 1,"www.baidu.com","14.215.177.39" */
if (at_resp_parse_line_args_by_kw(resp, "+CDNSGIP:", "+CDNSGIP: 1,%[^,],\"%[^\"]", domain, domain_ip) < 0)
{
rt_thread_mdelay(200);
/* resolve failed, maybe receive an URC CRLF */
continue;
}
if (rt_strlen(domain_ip) < 8)
{
rt_thread_mdelay(200);
/* resolve failed, maybe receive an URC CRLF */
continue;
}
else
{
rt_strncpy(ip, domain_ip, 15);
ip[15] = '\0';
break;
}
}
if (i == RESOLVE_RETRY)
{
result = -RT_ERROR;
}
if (resp)
{
at_delete_resp(resp);
}
return result;
}
/**
* set AT socket event notice callback
*
* @param event notice event
* @param cb notice callback
*/
static void sim76xx_socket_set_event_cb(at_socket_evt_t event, at_evt_cb_t cb)
{
if (event < (sizeof(at_evt_cb_set) / sizeof(at_evt_cb_set[1])))
{
at_evt_cb_set[event] = cb;
}
}
static void urc_send_func(struct at_client *client, const char *data, rt_size_t size)
{
int device_socket = 0, rqst_size, cnf_size;
struct at_device *device = RT_NULL;
char *client_name = client->device->parent.name;
RT_ASSERT(data && size);
device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
if (device == RT_NULL)
{
LOG_E("get device(%s) failed.");
return;
}
sscanf(data, "+CIPSEND: %d,%d,%d", &device_socket, &rqst_size, &cnf_size);
sim76xx_socket_event_send(device, SET_EVENT(device_socket, SIM76XX_EVENT_SEND_OK));
}
static void urc_connect_func(struct at_client *client, const char *data, rt_size_t size)
{
int device_socket = 0, result = 0;
struct at_device *device = RT_NULL;
char *client_name = client->device->parent.name;
RT_ASSERT(data && size);
device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
if (device == RT_NULL)
{
LOG_E("get device(%s) failed.", client_name);
return;
}
sscanf(data, "+CIPOPEN: %d,%d", &device_socket, &result);
if (result == 0)
{
sim76xx_socket_event_send(device, SET_EVENT(device_socket, SIM76XX_EVENT_CONN_OK));
}
else
{
at_tcp_ip_errcode_parse(result);
sim76xx_socket_event_send(device, SET_EVENT(device_socket, SIM76XX_EVENT_CONN_FAIL));
}
}
static void urc_close_func(struct at_client *client, const char *data, rt_size_t size)
{
int device_socket = 0, reason = 0;
struct at_socket *socket = RT_NULL;
struct at_device *device = RT_NULL;
char *client_name = client->device->parent.name;
RT_ASSERT(data && size);
device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
if (device == RT_NULL)
{
LOG_E("get device(%s) failed.", device->name);
return;
}
sscanf(data, "+IPCLOSE %d,%d", &device_socket, &reason);
/* get AT socket object by device socket descriptor */
socket = &(device->sockets[device_socket]);
/* notice the socket is disconnect by remote */
if (at_evt_cb_set[AT_SOCKET_EVT_CLOSED])
{
at_evt_cb_set[AT_SOCKET_EVT_CLOSED](socket, AT_SOCKET_EVT_CLOSED, RT_NULL, 0);
}
}
static void urc_recv_func(struct at_client *client, const char *data, rt_size_t size)
{
rt_size_t bfsz = 0, temp_size = 0;
rt_int32_t timeout;
char *recv_buf = RT_NULL, temp[8] = {0};
int device_socket = 0;
struct at_socket *socket = RT_NULL;
struct at_device *device = RT_NULL;
struct at_device_sim76xx *sim76xx = RT_NULL;
char *client_name = client->device->parent.name;
RT_ASSERT(data && size);
device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
if (device == RT_NULL)
{
LOG_E("get device(%s) failed.", client_name);
return;
}
sim76xx = (struct at_device_sim76xx *) device->user_data;
device_socket = (int) sim76xx->user_data;
/* get the current socket and receive buffer size by receive data */
sscanf(data, "+IPD%d:", (int *)&bfsz);
/* get receive timeout by receive buffer length */
timeout = bfsz * 10;
if (bfsz == 0)
return;
recv_buf = (char *) rt_calloc(1, bfsz);
if (recv_buf == RT_NULL)
{
LOG_E("no memory for receive buffer(%d).", bfsz);
/* read and clean the coming data */
while (temp_size < bfsz)
{
if (bfsz - temp_size > sizeof(temp))
{
at_client_obj_recv(client, temp, sizeof(temp), timeout);
}
else
{
at_client_obj_recv(client, temp, bfsz - temp_size, timeout);
}
temp_size += sizeof(temp);
}
return;
}
/* sync receive data */
if (at_client_obj_recv(client, recv_buf, bfsz, timeout) != bfsz)
{
LOG_E("%s device receive size(%d) data failed.", device->name, bfsz);
rt_free(recv_buf);
return;
}
/* get AT socket object by device socket descriptor */
socket = &(device->sockets[device_socket]);
/* notice the receive buffer and buffer size */
if (at_evt_cb_set[AT_SOCKET_EVT_RECV])
{
at_evt_cb_set[AT_SOCKET_EVT_RECV](socket, AT_SOCKET_EVT_RECV, recv_buf, bfsz);
}
}
static struct at_urc urc_table[] =
{
{"+CIPSEND:", "\r\n", urc_send_func},
{"+CIPOPEN:", "\r\n", urc_connect_func},
{"+IPCLOSE", "\r\n", urc_close_func},
{"+IPD", "\r\n", urc_recv_func},
};
static const struct at_socket_ops sim76xx_socket_ops =
{
sim76xx_socket_connect,
sim76xx_socket_close,
sim76xx_socket_send,
sim76xx_domain_resolve,
sim76xx_socket_set_event_cb,
};
/* initialize sim76xx device network URC feature */
int sim76xx_socket_init(struct at_device *device)
{
RT_ASSERT(device);
/* register URC data execution function */
at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
return RT_EOK;
}
/* resgiter sim76xx device socket operations */
int sim76xx_socket_class_register(struct at_device_class *class)
{
RT_ASSERT(class);
class->socket_num = AT_DEVICE_SIM76XX_SOCKETS_NUM;
class->socket_ops = &sim76xx_socket_ops;
return RT_EOK;
}
#endif /* AT_DEVICE_SIM76XX */
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