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# SMTP E-mail sender
[Applications]

## Detailed Description

The Simple Mail Transfer Protocol (SMTP) as defined by RFC821 is the standard way of sending and transfering e-mail on the Internet.

This simple example implementation is intended as an example of how to implement protocols in uIP, and is able to send out e-mail but has not been extensively tested.

## Files
file | smtp.h
| SMTP header file.

file | smtp.c
| SMTP example implementation.

## Data Structures
struct | smtp_state
## Defines
#define | SMTP_ERR_OK 0
| Error number that signifies a non-error condition.
#define | SMTP_SEND(to, cc, from, subject, msg) smtp_send(to, cc, from, subject, msg, strlen(msg))
#define | ISO_nl 0x0a
#define | ISO_cr 0x0d
#define | ISO_period 0x2e
#define | ISO_2 0x32
#define | ISO_3 0x33
#define | ISO_4 0x34
#define | ISO_5 0x35
## Functions
void | smtp_done (unsigned char error)
| Callback function that is called when an e-mail transmission is done.
void | smtp_init (void)
void | smtp_appcall (void)
void | smtp_configure (char *lhostname, void *server)
| Specificy an SMTP server and hostname.
unsigned char | smtp_send (char *to, char *cc, char *from, char *subject, char *msg, u16_t msglen)
| Send an e-mail.

## Function Documentation

void smtp_configure | ( | char * | lhostname,
|  | void * | server
| ) |

  | Specificy an SMTP server and hostname. This function is used to configure the SMTP module with an SMTP server and the hostname of the host. Parameters:
  | lhostname | The hostname of the uIP host.
  | server | A pointer to a 4-byte array representing the IP address of the SMTP server to be configured.
Definition at line 216 of file smtp.c. References uip_ipaddr_copy.

void smtp_done | ( | unsigned char | error | ) |

  | Callback function that is called when an e-mail transmission is done. This function must be implemented by the module that uses the SMTP module. Parameters:
  | error | The number of the error if an error occured, or SMTP_ERR_OK.
Examples: smtp.c, and smtp.h. Referenced by smtp_appcall().

unsigned char smtp_send | ( | char * | to,
|  | char * | cc,
|  | char * | from,
|  | char * | subject,
|  | char * | msg,
|  | u16_t | msglen
| ) |

  | Send an e-mail. Parameters:
  | to | The e-mail address of the receiver of the e-mail.
  | cc | The e-mail address of the CC: receivers of the e-mail.
  | from | The e-mail address of the sender of the e-mail.
  | subject | The subject of the e-mail.
  | msg | The actual e-mail message.
  | msglen | The length of the e-mail message.
Definition at line 233 of file smtp.c. References smtp_state::from, HTONS, smtp_state::msg, smtp_state::msglen, NULL, PSOCK_INIT, smtp_state::subject, smtp_state::to, and uip_connect().