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nuttx-apps/netutils/esp8266/esp8266.c

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/****************************************************************************
* apps/netutils/esp8266/esp8266.c
*
* Derives from an application to demo an Arduino connected to the ESPRESSIF
* ESP8266 with AT command firmware.
*
* Copyright (C) 2015 Pierre-Noel Bouteville. All rights reserved.
* Author: Pierre-Noel Bouteville <pnb990@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <pthread.h>
#include <poll.h>
#include <termios.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <netdb.h>
#include <arpa/inet.h>
#include "netutils/esp8266.h"
#ifdef CONFIG_NETUTILS_ESP8266
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define NETAPP_IPCONFIG_MAC_OFFSET (20)
#ifndef CONFIG_NETUTILS_ESP8266_MAXTXLEN
# define CONFIG_NETUTILS_ESP8266_MAXTXLEN 256
#endif
#ifndef CONFIG_NETUTILS_ESP8266_MAXRXLEN
# define CONFIG_NETUTILS_ESP8266_MAXRXLEN 256
#endif
#if (CONFIG_NETUTILS_ESP8266_MAXRXLEN < CONFIG_NETUTILS_ESP8266_WORKER_BUF_LEN)
# error "CONFIG_NETUTILS_ESP8266_WORKER_BUF_LEN would be bigger than CONFIG_NETUTILS_ESP8266_MAXRXLEN"
#endif
#define BUF_CMD_LEN CONFIG_NETUTILS_ESP8266_MAXTXLEN
#define BUF_ANS_LEN CONFIG_NETUTILS_ESP8266_MAXRXLEN
#define BUF_WORKER_LEN CONFIG_NETUTILS_ESP8266_WORKER_BUF_LEN
#define CON_NBR 4
#define ESP8266_ACCESS_POINT_NBR_MAX 32
#define lespWAITING_OK_POLLING_MS 250
#define lespTIMEOUT_FLUSH_MS 100
#define lespTIMEOUT_MS 1000
#define lespTIMEOUT_MS_SEND 1000
#define lespTIMEOUT_MS_CONNECTION 30000
#define lespTIMEOUT_MS_LISP_AP 5000
#define lespTIMEOUT_FLOODING_OFFSET_S 3
#define lespTIMEOUT_MS_RECV_S 60
#define lespCON_USED_MASK(idx) (1<<(idx))
#define lespPOLLING_TIME_MS 1000
/* Must be a power of 2 */
#define SOCKET_FIFO_SIZE 2048
#define SOCKET_NBR 4
#define FLAGS_SOCK_USED (1 << 0)
#define FLAGS_SOCK_CONNECTED (1 << 1)
#define FLAGS_SOCK_TYPE_MASK (3 << 2)
#define FLAGS_SOCK_TYPE_TCP (0 << 2)
#define FLAGS_SOCK_TYPE_UDP (1 << 2)
#define FLAGS_SOCK_TYPE_SSL (2 << 2) /* non standard but useful */
/****************************************************************************
* Private Types
****************************************************************************/
typedef enum
{
lesp_eERR = -1,
lesp_eNONE = 0,
lesp_eOK = 1
}lesp_ans_t;
typedef struct
{
sem_t *sem;
uint8_t flags;
uint16_t inndx;
uint16_t outndx;
struct timespec rcv_timeo;
uint8_t rxbuf[SOCKET_FIFO_SIZE];
} lesp_socket_t;
typedef struct
{
bool running;
pthread_t thread;
char rxbuf[BUF_WORKER_LEN];
sem_t sem; /* Inform that something is received */
char buf[BUF_ANS_LEN]; /* Last complete line received */
lesp_ans_t and; /* Last and received (OK,FAIL or ERROR) */
pthread_mutex_t mutex;
} lesp_worker_t;
typedef struct
{
pthread_mutex_t mutex;
bool is_initialized;
int fd;
lesp_worker_t worker;
lesp_socket_t sockets[SOCKET_NBR];
lesp_ans_t and;
char bufans[BUF_ANS_LEN];
char bufcmd[BUF_CMD_LEN];
struct hostent hostent;
/* ESP Got only One ip + 1 for NULL that indicate end of list */
in_addr_t * h_addr_list_buf[2];
in_addr_t in_addr;
} lesp_state_t;
/****************************************************************************
* Private Functions prototypes
****************************************************************************/
static int lesp_low_level_read(uint8_t *buf, int size);
static inline int lesp_read_ipd(int sockfd, int len);
static lesp_socket_t *get_sock(int sockfd);
/****************************************************************************
* Private Data
****************************************************************************/
lesp_state_t g_lesp_state =
{
.mutex = PTHREAD_MUTEX_INITIALIZER,
.is_initialized = false,
.fd = -1,
.worker.running = false,
.worker.and = lesp_eNONE,
.worker.mutex = PTHREAD_MUTEX_INITIALIZER,
.and = lesp_eNONE,
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lesp_clear_read_buffer
*
* Description:
*
* Input Parameters:
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lesp_clear_read_buffer(void)
{
g_lesp_state.bufans[0] = '\0';
}
/****************************************************************************
* Name: lesp_clear_read_ans
*
* Description:
*
* Input Parameters:
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lesp_clear_read_ans(void)
{
g_lesp_state.and = lesp_eNONE;
}
/****************************************************************************
* Name: lesp_str_to_unsigned
*
* Description:
*
* Input Parameters:
*
* Returned Value:
* unsigned value
*
****************************************************************************/
static inline int lesp_str_to_unsigned(char **p_ptr, char end)
{
int nbr = 0;
char *ptr = *p_ptr;
while (*ptr != end)
{
char c = *ptr++ - '0';
if ((c < 0) || (c >= 10))
return -1;
nbr *= 10;
nbr += c;
}
*p_ptr = ptr+1; /* Pass the end char */
return nbr;
}
/****************************************************************************
* Name: lesp_set_baudrate
*
* Description:
* Set com port to baudrate.
*
* Input Parameters:
* sockfd : int baudrate
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
#ifdef CONFIG_SERIAL_TERMIOS
static int lesp_set_baudrate(int baudrate)
{
struct termios term;
if (ioctl(g_lesp_state.fd, TCGETS, (unsigned long)&term) < 0)
{
nerr("ERROR: TCGETS failed.\n");
return -1;
}
if ((cfsetispeed(&term, baudrate) < 0) ||
(cfsetospeed(&term, baudrate) < 0))
{
nerr("ERROR: Cannot set baudrate %0x08X\n", baudrate);
return -1;
}
if (ioctl(g_lesp_state.fd, TCSETS, (unsigned long)&term) < 0)
{
nerr("ERROR: TCSETS failed.\n");
return -1;
}
return 0;
}
#endif
/****************************************************************************
* Name: get_sock
*
* Description:
* Get socket structure pointer of sockfd.
*
* Input Parameters:
* sockfd : socket id
*
* Returned Value:
* socket id pointer, NULL on error.
*
****************************************************************************/
static lesp_socket_t *get_sock(int sockfd)
{
DEBUGASSERT(sockfd >= 0);
if (!g_lesp_state.is_initialized)
{
errno = ENETDOWN;
ninfo("Esp8266 not initialized; can't list access points\n");
return NULL;
}
if (((unsigned int)sockfd) >= SOCKET_NBR)
{
errno = EINVAL;
ninfo("Esp8266 invalid sockfd\n", sockfd);
return NULL;
}
if ((g_lesp_state.sockets[sockfd].flags & FLAGS_SOCK_USED) == 0)
{
errno = EPERM;
nerr("ERROR: Connection id %d not Created!\n", sockfd);
return NULL;
}
return &g_lesp_state.sockets[sockfd];
}
/****************************************************************************
* Name: get_sock_protected
*
* Description:
* Get socket structure pointer of sockfd with worker.mutex portection.
*
* Input Parameters:
* sockfd : socket id
*
* Returned Value:
* socket id pointer, NULL on error.
*
****************************************************************************/
static lesp_socket_t *get_sock_protected(int sockfd)
{
lesp_socket_t *ret;
pthread_mutex_lock(&g_lesp_state.worker.mutex);
ret = get_sock(sockfd);
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
return ret;
}
/****************************************************************************
* Name: set_sock_closed
*
* Description:
* Set socket sockfd mark as closed without check and don't send message to
* esp8266.
*
* Input Parameters:
* sockfd : socket id
*
* Returned Value:
* None
*
****************************************************************************/
static void set_sock_closed(int sockfd)
{
sem_t *sem;
lesp_socket_t *sock;
DEBUGASSERT(((unsigned int)sockfd) < SOCKET_NBR);
sock = &g_lesp_state.sockets[sockfd];
sem = sock->sem;
sock->sem = NULL;
sock->flags = 0;
sock->inndx = 0;
sock->outndx = 0;
ninfo("Socket %d closed\n", sockfd);
if (sem != NULL)
{
sem_post(sem);
}
}
/****************************************************************************
* Name: lesp_low_level_read
*
* Description:
* put size data from esp8266 into buf.
*
* Input Parameters:
* buf : buffer to store read data
* size : size of data to read
*
* Returned Value:
* number of byte read, -1 in case of error.
*
****************************************************************************/
static int lesp_low_level_read(uint8_t *buf, int size)
{
int ret = 0;
struct pollfd fds[1];
memset(fds, 0, sizeof(struct pollfd));
fds[0].fd = g_lesp_state.fd;
fds[0].events = POLLIN;
/* poll return 1=>even occur 0=>timeout or -1=>error */
ret = poll(fds, 1, lespPOLLING_TIME_MS);
if (ret < 0)
{
int errcode = errno;
nerr("ERROR: worker read Error %d (errno %d)\n", ret, errcode);
UNUSED(errcode);
}
else if ((fds[0].revents & POLLERR) && (fds[0].revents & POLLHUP))
{
nerr("ERROR: worker poll read Error %d\n", ret);
ret = -1;
}
else if (fds[0].revents & POLLIN)
{
ret = read(g_lesp_state.fd, buf, size);
}
if (ret < 0)
{
return -1;
}
return ret;
}
/****************************************************************************
* Name: lesp_read_ipd
*
* Description:
* Try to treat an '+IPD' command in worker buffer. Worker buffer should
* already contain '+IPD,<id>,<len>:'
*
* Note:
* g_lesp_state.worker.mutex should be locked.
*
* Input Parameters:
* sockfd : socker number to put received data.
* len : data size to read on serial port.
*
* Returned Value:
* 1 was an IPD, 0 is not an IPD, -1 on error.
*
****************************************************************************/
static inline int lesp_read_ipd(int sockfd, int len)
{
lesp_socket_t *sock;
sock = get_sock(sockfd);
ninfo("Read %d bytes for socket %d \n", len, sockfd);
if (sock == NULL)
{
nwarn("socket not opened: drop all data.\n");
}
while (len)
{
int size;
uint8_t *buf = (uint8_t *)g_lesp_state.worker.rxbuf;
size = len;
if (size >= BUF_WORKER_LEN)
{
size = BUF_WORKER_LEN;
}
size = lesp_low_level_read(buf, size);
if (size <= 0)
{
return -1;
}
len -= size;
if (sock != NULL)
{
while (size--)
{
int next;
uint8_t b;
/* Read the next byte from the buffer */
b = *buf++;
/* Pre-calculate the next 'inndx'. We do this so that we can
* check if the FIFO is full.
*/
next = sock->inndx + 1;
if (next >= SOCKET_FIFO_SIZE)
{
next -= SOCKET_FIFO_SIZE;
}
/* Is there space in the circular buffer for another byte? If
* the next 'inndx' would be equal to the 'outndx', then the
* circular buffer is full.
*/
if (next == sock->outndx)
{
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
usleep(100); /* leave time of aplicative to read buffer */
pthread_mutex_lock(&g_lesp_state.worker.mutex);
}
if (next != sock->outndx)
{
/* Yes.. add the byte to the circular buffer */
sock->rxbuf[sock->inndx] = b;
sock->inndx = next;
}
else
{
/* No.. the we have lost data */
nwarn("overflow socket 0x%02X\n", b);
}
}
if (sock->sem)
{
ninfo("post %p \n", sock->sem);
sem_post(sock->sem);
}
}
}
return 1;
}
/****************************************************************************
* Name: lesp_vsend_cmd
*
* Description:
* Send cmd with format and argument like sprintf.
*
* Input Parameters:
* format : null terminated format string to send.
* ap : format values.
*
* Returned Value:
* len of cmd on success, -1 on error.
*
****************************************************************************/
int lesp_vsend_cmd(FAR const IPTR char *format, va_list ap)
{
int ret = 0;
ret = vsnprintf(g_lesp_state.bufcmd, BUF_CMD_LEN, format, ap);
if (ret >= BUF_CMD_LEN)
{
g_lesp_state.bufcmd[BUF_CMD_LEN-1] = '\0';
ninfo("Buffer too small for '%s'...\n", g_lesp_state.bufcmd);
ret = -1;
}
ninfo("Write:%s\n", g_lesp_state.bufcmd);
ret = write(g_lesp_state.fd, g_lesp_state.bufcmd, ret);
if (ret < 0)
{
ret = -1;
}
return ret;
}
/****************************************************************************
* Name: lesp_send_cmd
*
* Description:
* Send cmd with format and argument like sprintf.
*
* Input Parameters:
* format : null terminated format string to send.
* ... : format values.
*
* Note it clear AT Rx buffer (not socket buffer)
*
* Returned Value:
* len of cmd on success, -1 on error.
*
****************************************************************************/
static int lesp_send_cmd(FAR const IPTR char *format, ...)
{
int ret = 0;
va_list ap;
lesp_clear_read_buffer();
lesp_clear_read_ans();
/* Let lesp_vsend_cmd do the real work */
va_start(ap, format);
ret = lesp_vsend_cmd(format, ap);
va_end(ap);
return ret;
}
/****************************************************************************
* Name: lesp_read
*
* Description:
* Read a answer line with timeout.
*
* Input Parameters:
* timeout_ms : timeout in millisecond.
*
* Returned Value:
* len of line without line return on success, -1 on error.
*
****************************************************************************/
static int lesp_read(int timeout_ms)
{
int ret = 0;
struct timespec ts;
if (! g_lesp_state.is_initialized)
{
ninfo("Esp8266 not initialized; can't list access points\n");
return -1;
}
if (clock_gettime(CLOCK_REALTIME, &ts) < 0)
{
return -1;
}
ts.tv_nsec += (timeout_ms%1000) * 1000000;
if (ts.tv_nsec >= 1000000000)
{
ts.tv_nsec -= 1000000000;
ts.tv_sec += 1;
}
ts.tv_sec += (timeout_ms/1000);
do
{
if (sem_timedwait(&g_lesp_state.worker.sem, &ts) < 0)
{
return -1;
}
pthread_mutex_lock(&g_lesp_state.worker.mutex);
if (g_lesp_state.worker.and != lesp_eNONE)
{
g_lesp_state.and = g_lesp_state.worker.and;
g_lesp_state.worker.and = lesp_eNONE;
}
ret = strlen(g_lesp_state.worker.buf);
if (ret > 0)
{
/* +1 to copy null */
memcpy(g_lesp_state.bufans, g_lesp_state.worker.buf, ret+1);
}
g_lesp_state.worker.buf[0] = '\0'; /* buffer is read */
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
}
while ((ret <= 0) && (g_lesp_state.and == lesp_eNONE));
ninfo("lesp_read %d=>%s and and = %d \n", ret, g_lesp_state.bufans,
g_lesp_state.and);
return ret;
}
/****************************************************************************
* Name: lesp_flush
*
* Description:
* Read and discard all waiting data in rx buffer.
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
static void lesp_flush(void)
{
do
{
lesp_clear_read_buffer();
lesp_clear_read_ans();
}
while (lesp_read(lespTIMEOUT_FLUSH_MS) >= 0);
}
/****************************************************************************
* Name: lesp_read_ans_ok
*
* Description:
* Read up to read OK, ERROR, or FAIL.
*
* Input Parameters:
* timeout_ms : timeout in millisecond.
*
* Returned Value:
* 0 on OK, -1 on error.
*
****************************************************************************/
int lesp_read_ans_ok(int timeout_ms)
{
int ret = 0;
time_t end;
end = time(NULL) + (timeout_ms/1000) + lespTIMEOUT_FLOODING_OFFSET_S;
while (g_lesp_state.and != lesp_eOK)
{
ret = lesp_read(timeout_ms);
if ((ret < 0) || (g_lesp_state.and == lesp_eERR) || \
(time(NULL) > end))
{
ret = -1;
break;
}
ninfo("Got:%s\n", g_lesp_state.bufans);
}
lesp_clear_read_ans();
lesp_clear_read_buffer();
return ret;
}
/****************************************************************************
* Name: lesp_ask_ans_ok
*
* Description:
* Ask and ignore line start with '+' and except a "OK" answer.
*
* Input Parameters:
* cmd : command sent
* timeout_ms : timeout in millisecond
*
* Returned Value:
* len of line without line return on success, -1 on error.
*
****************************************************************************/
static int lesp_ask_ans_ok(int timeout_ms, FAR const IPTR char *format, ...)
{
int ret = 0;
va_list ap;
va_start(ap, format);
ret = lesp_vsend_cmd(format, ap);
va_end(ap);
if (ret >= 0)
{
ret = lesp_read_ans_ok(timeout_ms);
}
return ret;
}
/****************************************************************************
* Name: lesp_check
*
* Description:
* check if esp is ready (initialized and AT return OK)
*
* Input Parameters:
* None
*
* Returned Value:
* 0 : all is ok, -1 in case of error.
*
****************************************************************************/
static int lesp_check(void)
{
if (! g_lesp_state.is_initialized)
{
nerr("ERROR: ESP8266 not initialized\n");
return -1;
}
lesp_flush();
if (lesp_ask_ans_ok(lespTIMEOUT_MS, "AT\r\n") < 0)
{
nerr("ERROR: ESP8266 not answer at AT command\n");
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_parse_cipdomain_ans_line
*
* Description:
* Try to decode line start with:
* +CIPDOMAIN:
* see in:
* https://room-15.github.io/blog/2015/03/26/esp8266-at-command-reference/
* or
* http://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf
*
* net ip
* +CIPDOMAIN:"192.168.1.1"
*
* Note:
* - Content of ptr is modified and string in ap point into ptr string.
* - in current version, only one ip is returned by ESP8266.
*
* Input Parameters:
* ptr : +CIPDOMAIN line null terminated string pointer.
* ip : ip of hostname
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
static int lesp_parse_cwdomain_ans_line(const char *ptr, in_addr_t *ip)
{
int field_idx;
char *ptr_next;
for (field_idx = 0; field_idx <= 1; field_idx++)
{
if (field_idx == 0)
{
ptr_next = strchr(ptr, ':');
}
else if (field_idx == 1)
{
ptr_next = strchr(ptr, '\0');
}
if (ptr_next == NULL)
{
return -1;
}
*ptr_next = '\0';
switch (field_idx)
{
case 0:
if (strncmp(ptr, "+CIP", 4) != 0)
{
return -1;
}
break;
case 1:
/* No '"' for this command ! */
if (inet_pton(AF_INET, ptr, ip) < 0)
{
return -1;
}
break;
}
ptr = ptr_next + 1;
}
return 0;
}
/****************************************************************************
* Name: lesp_parse_cipxxx_ans_line
*
* Description:
* Try to decode line start with:
* +CIPAP?
* +CIPAP_XXX?
* +CIPSTA?
* +CIPSTA_XXX?
* see in:
* https://room-15.github.io/blog/2015/03/26/esp8266-at-command-reference/
* or
* http://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf
*
* net ip net mask
* +CIPxxxx:ip:"192.168.1.1","255.255.255.0","192.168.1.1",
*
* Note:
* - Content of ptr is modified and string in ap point into ptr string.
* - in current version, only net ip is returned by ESP8266.
*
* Input Parameters:
* ptr : +CWLAP line null terminated string pointer.
* ap : ap result of parsing.
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
static int lesp_parse_cipxxx_ans_line(const char *ptr, in_addr_t *ip)
{
int field_idx;
char *ptr_next;
for (field_idx = 0; field_idx <= 2; field_idx++)
{
if (field_idx <= 1)
{
ptr_next = strchr(ptr, ':');
}
else if (field_idx == 2)
{
ptr_next = strchr(ptr, '\0');
}
else
{
ptr_next = strchr(ptr, ',');
}
if (ptr_next == NULL)
{
return -1;
}
*ptr_next = '\0';
switch (field_idx)
{
case 0:
if (strncmp(ptr, "+CIP", 4) != 0)
{
return -1;
}
break;
case 1:
/* ip label */
break;
case 2:
ptr++; /* Remove first '"' */
*(ptr_next - 1) = '\0';
if (inet_pton(AF_INET, ptr, ip) < 0)
{
return -1;
}
break;
}
ptr = ptr_next + 1;
}
return 0;
}
/****************************************************************************
* Name: lesp_parse_cwjap_ans_line
*
* Description:
* Try to decode @b +CWJAP? or +CWJAP_XXX? line.
* see in:
* https://room-15.github.io/blog/2015/03/26/esp8266-at-command-reference/
* or
* http://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf
*
* SSID BSSID ch RSSI
* +CWLAP:"FreeWifi","00:07:cb:07:b6:00", 1, -90
* or
* +CWJAP_CUR:"WLACTAP","f4:f2:6d:e8:5e:74",6,-59
*
* Note: Content of ptr is modified and string in ap point into ptr string.
*
* Input Parameters:
* ptr : +CWLAP line null terminated string pointer.
* ap : ap result of parsing.
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
static int lesp_parse_cwjap_ans_line(char *ptr, lesp_ap_t *ap)
{
int field_idx;
char *ptr_next;
for (field_idx = 0; field_idx <= 4; field_idx++)
{
if (field_idx == 0)
{
ptr_next = strchr(ptr, ':');
}
else if (field_idx == 4)
{
ptr_next = strchr(ptr, '\0');
}
else
{
ptr_next = strchr(ptr, ',');
}
if (ptr_next == NULL)
{
return -1;
}
*ptr_next = '\0';
switch (field_idx)
{
case 0:
if (strncmp(ptr, "+CWJAP", 6) != 0)
{
return -1;
}
break;
case 1:
ptr++; /* Remove first '"' */
*(ptr_next - 1) = '\0';
strncpy(ap->ssid, ptr, lespSSID_SIZE);
ap->ssid[lespSSID_SIZE] = '\0';
break;
case 2:
{
int i;
ptr++; /* Remove first '"' */
*(ptr_next - 1) = '\0';
for (i = 0; i < lespBSSID_SIZE ; i++)
{
ap->bssid[i] = strtol(ptr, &ptr, 16);
if (*ptr == ':')
{
ptr++;
}
}
}
break;
case 3:
{
int i = atoi(ptr);
ap->channel = i;
}
break;
case 4:
{
int i = atoi(ptr);
if (i > 0)
{
i = -i;
}
ap->rssi = i;
}
break;
}
ptr = ptr_next + 1;
}
return 0;
}
/****************************************************************************
* Name: lesp_parse_cwlap_ans_line
*
* Description:
* Try to decode @b +CWLAP line.
* see in:
* https://room-15.github.io/blog/2015/03/26/esp8266-at-command-reference/
*
* +CWLAP:(0,"FreeWifi",-90,"00:07:cb:07:b6:00",1)
* 0 => security
* "FreeWifi" => ssid
* -90 => rssi
* "00:07:cb:07:b6:00" => mac
*
* Note: Content of ptr is modified and string in ap point into ptr string.
*
* Input Parameters:
* ptr : +CWLAP line null terminated string pointer.
* ap : ap result of parsing.
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
static int lesp_parse_cwlap_ans_line(char *ptr, lesp_ap_t *ap)
{
int field_idx;
char *ptr_next;
for (field_idx = 0; field_idx <= 5; field_idx++)
{
if (field_idx == 0)
{
ptr_next = strchr(ptr, '(');
}
else if (field_idx == 5)
{
ptr_next = strchr(ptr, ')');
}
else
{
ptr_next = strchr(ptr, ',');
}
if (ptr_next == NULL)
{
return -1;
}
*ptr_next = '\0';
switch (field_idx)
{
case 0:
if (strcmp(ptr, "+CWLAP:") != 0)
{
return -1;
}
break;
case 1:
{
int i = *ptr - '0';
if ((i < 0) || (i >= lesp_eSECURITY_NBR))
{
return -1;
}
ap->security = i;
}
break;
case 2:
ptr++; /* Remove first '"' */
*(ptr_next - 1) = '\0';
strncpy(ap->ssid, ptr, lespSSID_SIZE);
ap->ssid[lespSSID_SIZE] = '\0';
break;
case 3:
{
int i = atoi(ptr);
if (i > 0)
{
i = -i;
}
ap->rssi = i;
}
break;
case 4:
{
int i;
ptr++; /* Remove first '"' */
*(ptr_next - 1) = '\0';
for (i = 0; i < lespBSSID_SIZE ; i++)
{
ap->bssid[i] = strtol(ptr, &ptr, 16);
if (*ptr == ':')
{
ptr++;
}
}
}
break;
}
ptr = ptr_next + 1;
}
return 0;
}
/****************************************************************************
* Name: lesp_worker
*
* Description:
* Esp8266 worker thread.
*
* Input Parameters:
* args : unused
*
* Returned Value:
* NULL
*
****************************************************************************/
static void *lesp_worker(void *args)
{
int ret = 0;
int rxlen = 0;
lesp_worker_t *worker = &g_lesp_state.worker;
UNUSED(args);
ninfo("worker Started \n");
while (worker->running)
{
uint8_t c;
ret = lesp_low_level_read(&c, 1);
if (ret < 0)
{
nerr("ERROR: worker read data Error %d\n", ret);
}
else if (ret > 0)
{
/* ninfo("c:0x%02X (%c)\n", c); */
pthread_mutex_lock(&(worker->mutex));
if (c == '\n')
{
if (worker->rxbuf[rxlen-1] == '\r')
{
rxlen--;
}
DEBUGASSERT(rxlen >= 0);
DEBUGASSERT(rxlen < BUF_WORKER_LEN);
worker->rxbuf[rxlen] = '\0';
if (rxlen != 0)
{
if (strcmp(worker->rxbuf, "OK") == 0)
{
worker->and = lesp_eOK;
}
else if ((strcmp(worker->rxbuf, "FAIL") == 0) ||
(strcmp(worker->rxbuf, "ERROR") == 0)
)
{
worker->and = lesp_eERR;
}
else if ((rxlen == 8) &&
(memcmp(worker->rxbuf+1, ",CLOSED", 7) == 0))
{
unsigned int sockid = worker->rxbuf[0] - '0';
if (sockid < SOCKET_NBR)
{
set_sock_closed(sockid);
}
}
else
{
if (worker->buf[0] != '\0')
{
pthread_mutex_unlock(&(worker->mutex));
usleep(100); /* leave time of aplicative to read buffer */
pthread_mutex_lock(&(worker->mutex));
}
/* ninfo("Worker Read data:%s\n", worker->rxbuf); */
if (rxlen+1 <= BUF_ANS_LEN)
{
memcpy(worker->buf, worker->rxbuf, rxlen+1);
}
else
{
nerr("Worker and line is too long:%s\n", worker->rxbuf);
}
}
sem_post(&worker->sem);
worker->rxbuf[0] = '\0';
rxlen = 0;
}
}
else if (rxlen < BUF_WORKER_LEN - 1)
{
worker->rxbuf[rxlen++] = c;
if ((c == ':') && (memcmp(worker->rxbuf, "+IPD,", 5) == 0))
{
int sockfd;
int len;
char *ptr = worker->rxbuf+5;
sockfd = lesp_str_to_unsigned(&ptr, ',');
if (sockfd >= 0)
{
len = lesp_str_to_unsigned(&ptr, ':');
if (len >= 0)
{
lesp_read_ipd(sockfd, len);
}
}
rxlen = 0;
}
}
else
{
nerr("Read char overflow:%c\n", c);
}
pthread_mutex_unlock(&(worker->mutex));
}
}
return NULL;
}
/****************************************************************************
* Name: lesp_create_worker
*
* Description:
* start Esp8266 worker thread.
*
* Input Parameters:
* priority : POSIX priority of worker thread.
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
static inline int lesp_create_worker(int priority)
{
int ret = 0;
/* Thread */
pthread_attr_t thread_attr;
/* Ihm priority lower than normal */
struct sched_param param;
ret = pthread_attr_init(&thread_attr);
if (ret < 0)
{
nerr("ERROR: Cannot Set scheduler parameter thread (%d)\n", ret);
}
else
{
ret = pthread_attr_getschedparam(&thread_attr, &param);
if (ret >= 0)
{
param.sched_priority += priority;
ret = pthread_attr_setschedparam(&thread_attr, &param);
}
else
{
nerr("ERROR: Cannot Get/Set scheduler parameter thread (%d)\n", ret);
}
g_lesp_state.worker.running = true;
ret = pthread_create(&g_lesp_state.worker.thread,
(ret < 0)?NULL:&thread_attr, lesp_worker, NULL);
if (ret < 0)
{
nerr("ERROR: Cannot Create thread return (%d)\n", ret);
g_lesp_state.worker.running = false;
}
#if CONFIG_TASK_NAME_SIZE > 0
if (ret >= 0)
{
pthread_setname_np(g_lesp_state.worker.thread, "ESP8266");
}
#endif
if (pthread_attr_destroy(&thread_attr) < 0)
{
nerr("ERROR: Cannot destroy thread attribute (%d)\n", ret);
}
}
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lesp_initialize
*
* Description:
* initialise Esp8266 class.
* - open port
* - configure port
* - etc...
*
* Input Parameters:
* None
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
int lesp_initialize(void)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
if (g_lesp_state.is_initialized)
{
pthread_mutex_unlock(&g_lesp_state.mutex);
ninfo("Esp8266 already initialized\n");
return 0;
}
pthread_mutex_lock(&g_lesp_state.worker.mutex);
ninfo("Initializing Esp8266...\n");
memset(g_lesp_state.sockets, 0, SOCKET_NBR * sizeof(lesp_socket_t));
if (sem_init(&g_lesp_state.worker.sem, 0, 0) < 0)
{
ninfo("Cannot create semaphore\n");
ret = -1;
}
if (ret >= 0 && g_lesp_state.fd < 0)
{
g_lesp_state.fd = open(CONFIG_NETUTILS_ESP8266_DEV_PATH, O_RDWR);
}
if (ret >= 0 && g_lesp_state.fd < 0)
{
nerr("ERROR: Cannot open %s\n", CONFIG_NETUTILS_ESP8266_DEV_PATH);
ret = -1;
}
#ifdef CONFIG_SERIAL_TERMIOS
if (ret >= 0 && lesp_set_baudrate(CONFIG_NETUTILS_ESP8266_BAUDRATE) < 0)
{
nerr("ERROR: Cannot set baud rate %d\n", CONFIG_NETUTILS_ESP8266_BAUDRATE);
ret = -1;
}
#endif
if ((ret >= 0) && (g_lesp_state.worker.running == false))
{
ret = lesp_create_worker(CONFIG_NETUTILS_ESP8266_THREADPRIO);
}
if (ret < 0)
{
ninfo("Esp8266 initialisation failed!\n");
ret = -1;
}
else
{
g_lesp_state.is_initialized = true;
ninfo("Esp8266 initialized\n");
}
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
pthread_mutex_unlock(&g_lesp_state.mutex);
return 0;
}
/****************************************************************************
* Name: lesp_soft_reset
*
* Description:
* reset esp8266 (command "AT+RST");
*
* Input Parameters:
* None
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
int lesp_soft_reset(void)
{
int ret = 0;
int i;
pthread_mutex_lock(&g_lesp_state.mutex);
/* Rry to close opened reset */
pthread_mutex_lock(&g_lesp_state.worker.mutex);
for (i = 0; i < SOCKET_NBR; i++)
{
if ((g_lesp_state.sockets[i].flags & FLAGS_SOCK_USED) != 0)
{
set_sock_closed(i);
}
}
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
/* Leave time to close socket */
sleep(1);
/* Send reset */
lesp_send_cmd("AT+RST\r\n");
/* Leave time to reset */
sleep(1);
lesp_flush();
while (lesp_ask_ans_ok(lespTIMEOUT_MS, "ATE0\r\n") < 0)
{
sleep(1);
lesp_flush();
}
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+GMR\r\n");
}
/* Enable the module to act as a “Station” */
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CWMODE_CUR=1\r\n");
}
/* Enable the multi connection */
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CIPMUX=1\r\n");
}
if (ret < 0)
{
ret = -1;
}
pthread_mutex_unlock(&g_lesp_state.mutex);
return 0;
}
/****************************************************************************
* Name: lesp_soft_reset
*
* Description:
* reset esp8266 (command "AT+RST");
*
* Input Parameters:
* None
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
int lesp_ap_connect(const char *ssid_name, const char *ap_key, int timeout_s)
{
int ret = 0;
ninfo("Starting manual connect...\n");
pthread_mutex_lock(&g_lesp_state.mutex);
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_ask_ans_ok(timeout_s*1000, "AT+CWJAP=\"%s\",\"%s\"\r\n",
ssid_name, ap_key);
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
return -1;
}
ninfo("Wifi connected\n");
return 0;
}
/****************************************************************************
* Name: lesp_ap_get
*
* Description:
* Read the current connected Access Point.
*
* Input Parameters:
* None
*
* Output Parameters:
* ap : details of connected access point
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
int lesp_ap_get(lesp_ap_t *ap)
{
int ret = 0;
ninfo("Get Access Point info...\n");
pthread_mutex_lock(&g_lesp_state.mutex);
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_send_cmd("AT+CWJAP_CUR?\r\n");
}
if (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS);
}
if (ret >= 0)
{
ninfo("Read:%s\n", g_lesp_state.bufans);
ret = lesp_parse_cwjap_ans_line(g_lesp_state.bufans, ap);
if (ret < 0)
{
nerr("ERROR: Line badly formed.\n");
}
}
if (ret >= 0)
{
ret = lesp_read_ans_ok(lespTIMEOUT_MS);
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Get access point information.\n");
return -1;
}
ninfo("Connected to %s\n", ap->ssid);
return 0;
}
/****************************************************************************
* Name: lesp_get_net
*
* Description:
* Read the current network details.
*
* Input Parameters:
* mode : lesp_eMODE_AP or lesp_eMODE_STATION
*
* Output Parameters:
* ip : ip of interface
* mask : mask of interface (not implemented by esp8266)
* gw : gateway of interface (not implemented by esp8266)
*
* Returned Value:
* 0 on success, -1 in case of error.
*
****************************************************************************/
int lesp_get_net(lesp_mode_t mode, in_addr_t *ip, in_addr_t *mask, in_addr_t *gw)
{
int ret = 0;
ninfo("Get IP info...\n");
pthread_mutex_lock(&g_lesp_state.mutex);
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_send_cmd("AT+CIP%s_CUR?\r\n",
(mode == lesp_eMODE_STATION)?"STA":"AP");
}
if (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS);
}
if (ret >= 0)
{
ninfo("Read:%s\n", g_lesp_state.bufans);
ret = lesp_parse_cipxxx_ans_line(g_lesp_state.bufans, ip);
if (ret < 0)
{
nerr("ERROR: Line badly formed.\n");
}
}
if (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS);
}
if (ret >= 0)
{
ninfo("Read:%s\n", g_lesp_state.bufans);
ret = lesp_parse_cipxxx_ans_line(g_lesp_state.bufans, mask);
if (ret < 0)
{
nerr("ERROR: Line badly formed.\n");
}
}
if (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS);
}
if (ret >= 0)
{
ninfo("Read:%s\n", g_lesp_state.bufans);
ret = lesp_parse_cipxxx_ans_line(g_lesp_state.bufans, mask);
if (ret < 0)
{
nerr("ERROR: Line badly formed.\n");
}
}
if (ret >= 0)
{
ret = lesp_read_ans_ok(lespTIMEOUT_MS);
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Get network information.\n");
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_set_net
*
* Description:
* It will set network ip of mode.
* Warning: use lesp_eMODE_STATION or lesp_eMODE_AP.
*
* Input Parameters:
* mode : mode to configure.
* ip : ip of interface.
* mask : network mask of interface.
* gateway : gateway ip of network.
*
* Returned Value:
* 0 on success, -1 on error.
*
****************************************************************************/
int lesp_set_net(lesp_mode_t mode, in_addr_t ip, in_addr_t mask, in_addr_t gateway)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CIP%s_CUR=\"%d.%d.%d.%d\","
"\"%d.%d.%d.%d\",\"%d.%d.%d.%d\"\r\n",
(mode == lesp_eMODE_STATION)?"STA":"AP",
*((uint8_t *)&(ip)+0), *((uint8_t *)&(ip)+1),
*((uint8_t *)&(ip)+2), *((uint8_t *)&(ip)+3),
*((uint8_t *)&(gateway)+0),
*((uint8_t *)&(gateway)+1),
*((uint8_t *)&(gateway)+2),
*((uint8_t *)&(gateway)+3),
*((uint8_t *)&(mask)+0), *((uint8_t *)&(mask)+1),
*((uint8_t *)&(mask)+2), *((uint8_t *)&(mask)+3));
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_set_dhcp
*
* Description:
* It will Enable or disable DHCP of mode.
*
* Input Parameters:
* mode : mode to configure.
* enable : true for enable, false for disable.
*
* Returned Value:
* 0 on success, -1 on error.
*
****************************************************************************/
int lesp_set_dhcp(lesp_mode_t mode, bool enable)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CWDHCP_CUR=%d,%c\r\n",
mode, (enable)?'1':'0');
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_get_dhcp
*
* Description:
* It will get if DHCP is Enable or disable for each mode.
*
* Input Parameters:
* ap_enable : true DHCP is enable in Access Point mode, false otherwise.
* sta_enable : true DHCP is enable in Station mode, false otherwise.
*
* Returned Value:
* 0 on success, -1 on error.
*
****************************************************************************/
int lesp_get_dhcp(bool *ap_enable, bool *sta_enable)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Get DHCP State...\n");
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_send_cmd("AT+CWDHCP_CUR?\r\n");
}
if (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS);
}
if (ret >= 0)
{
char *ptr = g_lesp_state.bufans;
ninfo("Read:%s\n", ptr);
ptr = strchr(ptr, ':');
ptr++;
switch (*ptr - '0')
{
case 0:
*ap_enable = 0;
*sta_enable = 0;
break;
case 1:
*ap_enable = 1;
*sta_enable = 0;
break;
case 2:
*ap_enable = 0;
*sta_enable = 1;
break;
case 3:
*ap_enable = 1;
*sta_enable = 1;
break;
default:
nerr("ERROR: Line badly formed.\n");
break;
}
}
if (ret >= 0)
{
ret = lesp_read_ans_ok(lespTIMEOUT_MS);
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Get DHCP.\n");
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_list_access_points
*
* Description:
* Search all access points.
*
* Input Parameters:
* cb : call back call for each access point found.
*
* Returned Value:
* Number access point(s) found on success, -1 on error.
*
****************************************************************************/
int lesp_list_access_points(lesp_cb_t cb)
{
lesp_ap_t ap;
int ret = 0;
int number = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("List access point(s)...\n");
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT\r\n");
}
if (ret >= 0)
{
ret = lesp_send_cmd("AT+CWLAP\r\n");
}
while (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS_LISP_AP);
if (ret < 0)
{
continue;
}
ninfo("Read:%s\n", g_lesp_state.bufans);
if (strcmp(g_lesp_state.bufans, "OK") == 0)
{
break;
}
ret = lesp_parse_cwlap_ans_line(g_lesp_state.bufans, &ap);
if (ret < 0)
{
nerr("ERROR: Line badly formed.");
}
cb(&ap);
number++;
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: list access points.");
return -1;
}
ninfo("Access Point list finished with %d ap founds\n", number);
return number;
}
/****************************************************************************
* Name: lesp_security_to_str
*
* Description:
* return corresponding string of security enum.
*
* Input Parameters:
* security : enum value of string
*
* Returned Value:
* String corresponding to security value.
*
****************************************************************************/
const char *lesp_security_to_str(lesp_security_t security)
{
switch (security)
{
case lesp_eSECURITY_NONE:
return "NONE";
case lesp_eSECURITY_WEP:
return "WEP";
case lesp_eSECURITY_WPA_PSK:
return "WPA_PSK";
case lesp_eSECURITY_WPA2_PSK:
return "WPA2_PSK";
case lesp_eSECURITY_WPA_WPA2_PSK:
return "WPA_WPA2_PSK";
default:
return "Unknown";
}
}
/****************************************************************************
* Name: lesp_socket
*
* Description:
* Equivalent of POSIX socket for esp8266.
* socket() creates an endpoint for communication and returns a descriptor.
*
* Input Parameters:
* domain : only PF_INET is supported
* type : only SOCK_STREAM is supported
* protocol : only IPPROTO_TCP is supported
*
* Returned Value:
* A non-negative socket descriptor on success; -1 on error.
*
****************************************************************************/
int lesp_socket(int domain, int type, int protocol)
{
int ret = 0;
int i = CON_NBR;
int flags = 0;
if (domain != PF_INET)
{
nerr("ERROR: only PF_INET Implemented!\n");
return -1;
}
switch (type)
{
case SOCK_STREAM:
flags |= FLAGS_SOCK_TYPE_TCP;
break;
case SOCK_DGRAM:
flags |= FLAGS_SOCK_TYPE_UDP;
break;
case -1:
flags |= FLAGS_SOCK_TYPE_SSL;
break;
default:
nerr("ERROR: Only SOCK_DGRAM and SOCK_STREAM Implemented!\n");
errno = ESOCKTNOSUPPORT;
return -1;
}
flags |= FLAGS_SOCK_USED;
pthread_mutex_lock(&g_lesp_state.worker.mutex);
ret = -1;
if (!g_lesp_state.is_initialized)
{
ninfo("Esp8266 not initialized; can't list access points\n");
errno = ENETDOWN;
}
else
{
for (i = 0; i < CON_NBR; i++)
{
if ((g_lesp_state.sockets[i].flags & FLAGS_SOCK_USED) == 0)
{
g_lesp_state.sockets[i].flags = flags;
g_lesp_state.sockets[i].rcv_timeo.tv_sec = lespTIMEOUT_MS_RECV_S;
g_lesp_state.sockets[i].rcv_timeo.tv_nsec = 0;
ret = i;
break;
}
}
if (ret < 0)
{
errno = EAGAIN;
}
}
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
return ret;
}
/****************************************************************************
* Name: lesp_closesocket
*
* Description:
* Equivalent of POSIX close for esp8266.
* close socket creates with lesp_socket.
*
* Input Parameters:
* sockfd : socket indentifer.
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_closesocket(int sockfd)
{
int ret = 0;
lesp_socket_t *sock = NULL;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("List access point(s)...\n");
ret = lesp_check();
if (ret >= 0)
{
sock = get_sock_protected(sockfd);
if (sock == NULL)
{
ret = -1;
}
}
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CIPCLOSE=%d\r\n", sockfd);
pthread_mutex_lock(&g_lesp_state.worker.mutex);
set_sock_closed(sockfd);
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Close socket %d.\n", sockfd);
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_bind
*
* Description:
* Equivalent of POSIX bind for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor of the socket to bind
* addr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_bind(int sockfd, FAR const struct sockaddr *addr, socklen_t addrlen)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Bind socket %d...\n", sockfd);
ret = lesp_check();
if (ret >= 0)
{
nerr("ERROR: Not implemented %s\n", __func__);
errno = EIO;
ret = -1;
}
pthread_mutex_unlock(&g_lesp_state.mutex);
return ret;
}
/****************************************************************************
* Name: lesp_connect
*
* Description:
* Equivalent of POSIX connect for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* addr Server address (form depends on type of socket)
* addrlen Length of actual 'addr'
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_connect(int sockfd, FAR const struct sockaddr *addr, socklen_t addrlen)
{
int ret = 0;
const char *proto_str;
lesp_socket_t *sock;
struct sockaddr_in *in;
unsigned short port;
in_addr_t ip;
in = (struct sockaddr_in *)addr;
port = ntohs(in->sin_port); /* e.g. htons(3490) */
ip = in->sin_addr.s_addr;
DEBUGASSERT(in->sin_family == AF_INET);
DEBUGASSERT(addrlen == sizeof(struct sockaddr_in));
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Connect %d...\n", sockfd);
ret = lesp_check();
if (ret >= 0)
{
pthread_mutex_lock(&g_lesp_state.worker.mutex);
sock = get_sock(sockfd);
if (sock == NULL)
{
ret = -1;
}
}
if (ret >= 0)
{
switch (FLAGS_SOCK_TYPE_MASK & sock->flags)
{
case FLAGS_SOCK_TYPE_TCP:
proto_str = "TCP";
break;
case FLAGS_SOCK_TYPE_UDP:
proto_str = "UDP";
break;
case FLAGS_SOCK_TYPE_SSL:
proto_str = "SSL";
break;
default:
errno = ESOCKTNOSUPPORT;
ret = -1;
}
}
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CIPSTART=%d,\"%s\","
"\"%d.%d.%d.%d\",%d\r\n", sockfd, proto_str,
*((uint8_t *)&(ip)+0), *((uint8_t *)&(ip)+1),
*((uint8_t *)&(ip)+2), *((uint8_t *)&(ip)+3), port);
if (ret < 0)
{
errno = EIO;
}
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Connect socket %d.\n", sockfd);
return -1;
}
return 0;
}
/****************************************************************************
* Name: lesp_listen
*
* Description:
* Equivalent of POSIX listen for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* backlog The maximum length the queue of pending connections may grow.
* If a connection request arrives with the queue full, the client
* may receive an error with an indication of ECONNREFUSED or,
* if the underlying protocol supports retransmission, the request
* may be ignored so that retries succeed.
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_listen(int sockfd, int backlog)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Connect %d...\n", sockfd);
ret = lesp_check();
if (ret >= 0)
{
nerr("ERROR: Not implemented %s\n", __func__);
errno = EIO;
ret = -1;
}
pthread_mutex_unlock(&g_lesp_state.mutex);
return ret;
}
/****************************************************************************
* Name: lesp_accept
*
* Description:
* Equivalent of POSIX accept for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* addr Receives the address of the connecting client
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Connect %d...\n", sockfd);
ret = lesp_check();
if (ret >= 0)
{
nerr("ERROR: Not implemented %s\n", __func__);
errno = EIO;
ret = -1;
}
pthread_mutex_unlock(&g_lesp_state.mutex);
return ret;
}
/****************************************************************************
* Name: lesp_send
*
* Description:
* Equivalent of POSIX send for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* buf Data to send
* len Length of data to send
* flags Send flags
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
ssize_t lesp_send(int sockfd, FAR const uint8_t *buf, size_t len, int flags)
{
int ret = 0;
lesp_socket_t *sock = NULL;
UNUSED(flags);
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Send %d bytes in %d socket...\n", len, sockfd);
ret = lesp_check();
if (ret >= 0)
{
sock = get_sock_protected(sockfd);
if (sock == NULL)
{
ret = -1;
}
}
if (ret >= 0)
{
ret = lesp_ask_ans_ok(lespTIMEOUT_MS, "AT+CIPSEND=%d,%d\r\n", sockfd, len);
}
if (ret >= 0)
{
ninfo("Sending in socket %d, %d bytes\n", sockfd, len);
ret = write(g_lesp_state.fd, buf, len);
}
while (ret >= 0)
{
char * ptr = g_lesp_state.bufans;
ret = lesp_read(lespTIMEOUT_MS);
if (ret < 0)
{
break;
}
while ((*ptr != 0) && (*ptr != 'S'))
{
ptr++;
}
if (*ptr == 'S')
{
if (strcmp(ptr, "SEND OK") == 0)
break;
}
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Cannot send in socket %d, %d bytes\n", sockfd, len);
return -1;
}
ninfo("Sent\n");
return len;
}
/****************************************************************************
* Name: lesp_recv
*
* Description:
* Equivalent of POSIX recv for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* buf Data to receive
* len Length of data to receive
* flags Send flags
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
ssize_t lesp_recv(int sockfd, FAR uint8_t *buf, size_t len, int flags)
{
int ret = 0;
lesp_socket_t *sock;
sem_t sem;
if (sem_init(&sem, 0, 0) < 0)
{
ninfo("Cannot create semaphore\n");
return -1;
}
pthread_mutex_lock(&g_lesp_state.worker.mutex);
UNUSED(flags);
sock = get_sock(sockfd);
if (sock == NULL)
{
ret = -1;
}
if (ret >= 0 && sock->inndx == sock->outndx)
{
struct timespec ts;
if (clock_gettime(CLOCK_REALTIME, &ts) < 0)
{
ret = -1;
}
else
{
ts.tv_sec += sock->rcv_timeo.tv_sec;
ts.tv_nsec += sock->rcv_timeo.tv_nsec;
if (ts.tv_nsec >= 1000000000)
{
ts.tv_sec++;
ts.tv_nsec -= 1000000000;
}
sock->sem = &sem;
while (ret >= 0 && sock->inndx == sock->outndx)
{
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
ret = sem_timedwait(&sem, &ts);
pthread_mutex_lock(&g_lesp_state.worker.mutex);
}
sock->sem = NULL;
}
}
if (ret >= 0)
{
ret = 0;
while (ret < len && sock->outndx != sock->inndx)
{
/* Remove one byte from the circular buffer */
int ndx = sock->outndx;
*buf++ = sock->rxbuf[ndx];
/* Increment the circular buffer 'outndx' */
if (++ndx >= SOCKET_FIFO_SIZE)
{
ndx -= SOCKET_FIFO_SIZE;
}
sock->outndx = ndx;
/* Increment the count of bytes returned */
ret++;
}
}
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
if (ret < 0)
{
return -1;
}
return ret;
}
/****************************************************************************
* Name: lesp_setsockopt
*
* Description:
* Equivalent of POSIX setsockopt for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* level Protocol level to set the option
* option identifies the option to set
* value Points to the argument value
* value_len The length of the argument value
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_setsockopt(int sockfd, int level, int option,
FAR const void *value, socklen_t value_len)
{
int ret = 0;
lesp_socket_t *sock;
if (level != SOL_SOCKET)
{
nerr("ERROR: %s:Not implemented level:%d\n", __func__, level);
errno = EINVAL;
return -1;
}
pthread_mutex_lock(&g_lesp_state.worker.mutex);
sock = get_sock(sockfd);
if (sock == NULL)
{
ret = -1;
}
else
{
switch (option)
{
case SO_RCVTIMEO:
if (value_len == sizeof(struct timeval))
{
sock->rcv_timeo.tv_sec = ((struct timeval *)(value))->tv_sec;
sock->rcv_timeo.tv_nsec = ((struct timeval *)(value))->tv_usec;
sock->rcv_timeo.tv_nsec *= 1000; /* tv_usec to tv_nsec */
}
else
{
nerr("ERROR: Wrong size:%d\n", level);
errno = EINVAL;
ret = -1;
}
break;
default:
nerr("ERROR: Not implemented %s\n", __func__);
errno = EINVAL;
ret = -1;
break;
}
}
pthread_mutex_unlock(&g_lesp_state.worker.mutex);
return ret;
}
/****************************************************************************
* Name: lesp_getsockopt
*
* Description:
* Equivalent of POSIX getsockopt for esp8266.
*
* Input Parameters:
* sockfd Socket descriptor returned by socket()
* level Protocol level to set the option
* option identifies the option to set
* value Points to the argument value
* value_len The length of the argument value
*
* Returned Value:
* A 0 on success; -1 on error.
*
****************************************************************************/
int lesp_getsockopt(int sockfd, int level, int option, FAR void *value,
FAR socklen_t *value_len)
{
int ret = 0;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("getsockopt on %d socket...\n", sockfd);
ret = lesp_check();
if (ret >= 0)
{
nerr("ERROR: Not implemented %s\n", __func__);
errno = EIO;
ret = -1;
}
pthread_mutex_unlock(&g_lesp_state.mutex);
return ret;
}
/****************************************************************************
* Name: lesp_gethostbyname
*
* Description:
* Equivalent of POSIX gethostbyname for esp8266.
*
* Input Parameters:
* name - The name of the host to find.
*
* Returned Value:
* Upon successful completion, this function will return a pointer to a
* hostent structure if the requested entry was found, and a null pointer
* if the end of the database was reached or the requested entry was not
* found.
*
* Upon unsuccessful completion, gethostbyname() return NULL.
*
****************************************************************************/
FAR struct hostent *lesp_gethostbyname(FAR const char *hostname)
{
int ret = 0;
memset(&g_lesp_state.hostent, 0, sizeof(g_lesp_state.hostent));
g_lesp_state.hostent.h_addr_list = (char**)&g_lesp_state.h_addr_list_buf;
g_lesp_state.hostent.h_addrtype = AF_INET;
g_lesp_state.hostent.h_length = sizeof(struct sockaddr_in);
g_lesp_state.h_addr_list_buf[0] = &g_lesp_state.in_addr;
g_lesp_state.h_addr_list_buf[1] = NULL;
pthread_mutex_lock(&g_lesp_state.mutex);
ninfo("Get host by name '%s' ...\n", hostname);
ret = lesp_check();
if (ret >= 0)
{
ret = lesp_send_cmd("AT+CIPDOMAIN=\"%s\"\r\n", hostname);
}
if (ret >= 0)
{
ret = lesp_read(lespTIMEOUT_MS);
}
if (ret >= 0)
{
ninfo("Read:%s\n", g_lesp_state.bufans);
ret = lesp_parse_cwdomain_ans_line(g_lesp_state.bufans,
&g_lesp_state.in_addr);
if (ret < 0)
{
nerr("ERROR: Line badly formed.\n");
errno = EIO;
}
}
if (ret >= 0)
{
ret = lesp_read_ans_ok(lespTIMEOUT_MS);
}
pthread_mutex_unlock(&g_lesp_state.mutex);
if (ret < 0)
{
nerr("ERROR: Get host by name.\n");
return NULL;
}
return &g_lesp_state.hostent;
}
#endif /* CONFIG_NETUTILS_ESP8266 */
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