winc3400/send_email_example/main21.c File Reference

WINC3400 Send Email Example.

Copyright (c) 2017-2019 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"
#include "main.h"
#include "bsp/include/nm_bsp.h"
#include "driver/include/m2m_wifi.h"
#include "socket/include/socket.h"

Macros
#define	STRING_EOL   "\r\n"
#define	STRING_HEADER

Functions
static void	close_socket (void)
	Close socket function. More...
static void	configure_console (void)
	Configure UART console. More...
void	ConvertToBase64 (char *pcOutStr, const char *pccInStr, int iLen)
static void	generateBase64Key (char *input, char *basekey)
	Generates Base64 Key needed for authentication. More...
int	main (void)
	Main application function. More...
static void	resolve_cb (uint8_t *hostName, uint32_t hostIp)
	Callback function of IP address. More...
static void	retry_smtp_server (void)
	Retry SMTP server function. More...
static int8_t	smtpConnect (void)
	Creates and connects to an unsecure socket to be used for SMTP. More...
static void	smtpSendRecv (long socket, char *cmd, char *cmdparam, char *respBuf)
	Sends an SMTP command and provides the server response. More...
static int8_t	smtpStateHandler (void)
	SMTP state handler. More...
static void	socket_cb (SOCKET sock, uint8_t u8Msg, void *pvMsg)
	Callback function of TCP client socket. More...
static void	wifi_cb (uint8_t u8MsgType, void *pvMsg)
	Callback to get the Wi-Fi status update. More...

Variables
static struct usart_module	cdc_uart_module
	UART module for debug. More...
static bool	gbConnectedWifi = false
	Wi-Fi status variable. More...
static bool	gbHostIpByName = false
	Get host IP status variable. More...
char	gcHandlerBuffer [MAIN_SMTP_BUF_LEN]
	Handler buffer definition. More...
char	gcPasswordBasekey [128]
	Password basekey definition. More...
char	gcSendRecvBuffer [MAIN_SMTP_BUF_LEN]
	Send and receive buffer definition. More...
char	gcUserBasekey [128]
	Username basekey definition. More...
int8_t	gs8EmailError = MAIN_EMAIL_ERROR_NONE
	SMTP email error information. More...
uint32_t	gu32HostIp = 0
	IP address of host. More...
uint8_t	gu8RetryCount = 0
	Retry count. More...
uint8_t	gu8SmtpStatus = SMTP_INIT
	SMTP information. More...
uint8_t	gu8SocketStatus = SocketInit
static SOCKET	tcp_client_socket = -1
	TCP client socket handler. More...

#define STRING_EOL   "\r\n"

#define STRING_HEADER

Value:

"-- WINC3400 send email example --"STRING_EOL \
    "-- "BOARD_NAME " --"STRING_EOL \
    "-- Compiled: "__DATE__ " "__TIME__ " --"STRING_EOL

Referenced by main().

static void close_socket ( void  )

static

Close socket function.

Returns

None.

References close(), and tcp_client_socket.

Referenced by main(), and retry_smtp_server().

static void configure_console ( void  )

static

Configure UART console.

References usart_config::baudrate, cdc_uart_module, usart_config::mux_setting, usart_config::pinmux_pad0, usart_config::pinmux_pad1, usart_config::pinmux_pad2, usart_config::pinmux_pad3, usart_enable(), and usart_get_config_defaults().

void ConvertToBase64	(	char *	pcOutStr,
		const char *	pccInStr,
		int	iLen
	)

References g_ccB64Tbl.

static void generateBase64Key ( char *  input, char *  basekey  )

static

Generates Base64 Key needed for authentication.

Parameters

[in]	input	is the string to be converted to base64.
[in]	basekey1	is the base64 converted output.

Returns

None.

References ConvertToBase64().

Referenced by socket_cb().

int main

(

void

)

Main application function.

Initialize system, UART console, network then start function of SMTP email client.

Returns

Program return value.

References close_socket(), configure_console(), gbConnectedWifi, gbHostIpByName, gs8EmailError, gu8RetryCount, gu8SocketStatus, M2M_SUCCESS, M2M_WIFI_CH_ALL, m2m_wifi_connect(), m2m_wifi_handle_events(), m2m_wifi_init(), MAIN_EMAIL_ERROR_INIT, MAIN_EMAIL_ERROR_NONE, MAIN_RETRY_COUNT, MAIN_WLAN_AUTH, MAIN_WLAN_PSK, MAIN_WLAN_SSID, nm_bsp_init(), NULL, tstrWifiInitParam::pfAppWifiCb, port_pin_set_output_level(), printf, registerSocketCallback(), resolve_cb(), ret, retry_smtp_server(), smtpConnect(), smtpStateHandler(), SOCK_ERR_NO_ERROR, socket_cb(), SocketComplete, SocketConnect, SocketError, SocketInit, socketInit(), SocketWaiting, STRING_HEADER, system_init(), tcp_client_socket, and wifi_cb().

static void resolve_cb ( uint8_t *  hostName, uint32_t  hostIp  )

static

Callback function of IP address.

Parameters

[in]	hostName	Domain name.
[in]	hostIp	Server IP.

Returns

None.

References gbHostIpByName, gu32HostIp, IPV4_BYTE, and printf.

Referenced by main().

static void retry_smtp_server ( void  )

static

Retry SMTP server function.

Returns

None.

References close_socket(), delay_ms, gbHostIpByName, gu8SmtpStatus, gu8SocketStatus, m2m_wifi_disconnect(), MAIN_WAITING_TIME, SMTP_INIT, and SocketInit.

Referenced by main().

static int8_t smtpConnect ( void  )

static

Creates and connects to an unsecure socket to be used for SMTP.

Parameters

[in]

None.

Returns

SOCK_ERR_NO_ERROR if success, -1 if socket create error, SOCK_ERR_INVALID if socket connect error.

References _htons, AF_INET, close(), connect(), gu32HostIp, MAIN_GMAIL_HOST_PORT, printf, in_addr::s_addr, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_port, SOCK_ERR_INVALID, SOCK_ERR_NO_ERROR, SOCK_STREAM, socket(), SOCKET_FLAGS_SSL, and tcp_client_socket.

Referenced by main().

static void smtpSendRecv ( long  socket, char *  cmd, char *  cmdparam, char *  respBuf  )

static

Sends an SMTP command and provides the server response.

Parameters

[in]	socket	is the socket descriptor to be used for sending.
[in]	cmd	is the string of the command.
[in]	cmdpara	is the command parameter.
[in]	respBuf	is a pointer to the SMTP response from the server.

Returns

None.

References cSmtpCrlf, gcSendRecvBuffer, MAIN_SMTP_BUF_LEN, NULL, recv(), and send().

Referenced by smtpStateHandler().

static int8_t smtpStateHandler ( void  )

static

SMTP state handler.

Parameters

[in]

None.

Returns

MAIN_EMAIL_ERROR_NONE if success, MAIN_EMAIL_ERROR_FAILED if handler error.

References cSmtpCrlf, cSmtpData, cSmtpDataEnd, cSmtpFrom, cSmtpMailFrom, cSmtpQuit, cSmtpRcpt, cSmtpSubject, cSmtpTo, gcHandlerBuffer, gcPasswordBasekey, gcUserBasekey, gu8SmtpStatus, MAIN_EMAIL_ERROR_FAILED, MAIN_EMAIL_ERROR_NONE, MAIN_EMAIL_MSG, MAIN_EMAIL_SUBJECT, MAIN_FROM_ADDRESS, MAIN_RECIPIENT_RFC, MAIN_SENDER_RFC, MAIN_TO_ADDRESS, NULL, printf, send(), SMTP_AUTH, SMTP_AUTH_PASSWORD, SMTP_AUTH_USERNAME, SMTP_DATA, SMTP_ERROR, SMTP_FROM, SMTP_HELO, SMTP_MESSAGE_BODY, SMTP_MESSAGE_CRLF, SMTP_MESSAGE_DATAEND, SMTP_MESSAGE_FROM, SMTP_MESSAGE_SUBJECT, SMTP_MESSAGE_TO, SMTP_QUIT, SMTP_RCPT, smtpSendRecv(), and tcp_client_socket.

Referenced by main().

static void socket_cb ( SOCKET  sock, uint8_t  u8Msg, void *  pvMsg  )

static

Callback function of TCP client socket.

Parameters

[in]	sock	socket handler.
[in]	u8Msg	Type of Socket notification
[in]	pvMsg	A structure contains notification informations.

Returns

None.

References cSmtpCodeAuthReply, cSmtpCodeAuthSuccess, cSmtpCodeIntermedReply, cSmtpCodeOkReply, cSmtpCodeReady, gcHandlerBuffer, gcPasswordBasekey, gcUserBasekey, generateBase64Key(), gs8EmailError, gu8SmtpStatus, gu8SocketStatus, MAIN_EMAIL_ERROR_AUTH, MAIN_EMAIL_ERROR_AUTH_PASSWORD, MAIN_EMAIL_ERROR_AUTH_USERNAME, MAIN_EMAIL_ERROR_DATA, MAIN_EMAIL_ERROR_FROM, MAIN_EMAIL_ERROR_HELO, MAIN_EMAIL_ERROR_INIT, MAIN_EMAIL_ERROR_MESSAGE, MAIN_EMAIL_ERROR_RCPT, MAIN_FROM_ADDRESS, MAIN_FROM_PASSWORD, MAIN_SMTP_BUF_LEN, printf, tstrSocketRecvMsg::pu8Buffer, recv(), tstrSocketRecvMsg::s16BufferSize, tstrSocketConnectMsg::s8Error, SMTP_AUTH, SMTP_AUTH_PASSWORD, SMTP_AUTH_USERNAME, SMTP_DATA, SMTP_ERROR, SMTP_FROM, SMTP_HELO, SMTP_INIT, SMTP_MESSAGE_BODY, SMTP_MESSAGE_CRLF, SMTP_MESSAGE_DATAEND, SMTP_MESSAGE_FROM, SMTP_MESSAGE_SUBJECT, SMTP_MESSAGE_TO, SMTP_QUIT, SMTP_RCPT, SOCK_ERR_NO_ERROR, SOCKET_MSG_CONNECT, SOCKET_MSG_RECV, SOCKET_MSG_SEND, SocketComplete, SocketConnect, SocketError, SocketWaiting, and tcp_client_socket.

Referenced by main().

static void wifi_cb ( uint8_t  u8MsgType, void *  pvMsg  )

static

Callback to get the Wi-Fi status update.

Parameters

[in]	u8MsgType	Type of Wi-Fi notification.
[in]	pvMsg	A pointer to a buffer containing the notification parameters.

Returns

None.

References gbConnectedWifi, gbHostIpByName, gethostbyname(), M2M_WIFI_CH_ALL, m2m_wifi_connect(), M2M_WIFI_CONNECTED, M2M_WIFI_DISCONNECTED, M2M_WIFI_REQ_DHCP_CONF, M2M_WIFI_RESP_CON_STATE_CHANGED, MAIN_GMAIL_HOST_NAME, MAIN_WLAN_AUTH, MAIN_WLAN_PSK, MAIN_WLAN_SSID, printf, and tstrM2mWifiStateChanged::u8CurrState.

Referenced by main().

struct usart_module cdc_uart_module

static

UART module for debug.

bool gbConnectedWifi = false

static

Wi-Fi status variable.

Referenced by main(), and wifi_cb().

bool gbHostIpByName = false

static

Get host IP status variable.

Referenced by main(), resolve_cb(), retry_smtp_server(), and wifi_cb().

char gcHandlerBuffer[MAIN_SMTP_BUF_LEN]

Handler buffer definition.

char gcPasswordBasekey[128]

Password basekey definition.

char gcSendRecvBuffer[MAIN_SMTP_BUF_LEN]

Send and receive buffer definition.

char gcUserBasekey[128]

Username basekey definition.

int8_t gs8EmailError = MAIN_EMAIL_ERROR_NONE

SMTP email error information.

uint32_t gu32HostIp = 0

IP address of host.

uint8_t gu8RetryCount = 0

Retry count.

uint8_t gu8SmtpStatus = SMTP_INIT

SMTP information.

uint8_t gu8SocketStatus = SocketInit

SOCKET tcp_client_socket = -1

static

TCP client socket handler.

Referenced by close_socket(), main(), smtpConnect(), smtpStateHandler(), and socket_cb().