/** * \addtogroup apps * @{ *//** * \defgroup smtp SMTP E-mail sender * @{ * * 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. *//** * \file * SMTP example implementation * \author Adam Dunkels <adam@dunkels.com> *//* * Copyright (c) 2004, Adam Dunkels. * All rights reserved. * * 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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. * * This file is part of the uIP TCP/IP stack. * * Author: Adam Dunkels <adam@sics.se> * * $Id: smtp.c,v 1.4 2006/06/11 21:46:37 adam Exp $ */#include "smtp.h"#include "smtp-strings.h"#include "psock.h"#include "uip.h"#include <string.h>static struct smtp_state s;static char *localhostname;static uip_ipaddr_t smtpserver;#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/*---------------------------------------------------------------------------*/staticPT_THREAD(smtp_thread(void)){  PSOCK_BEGIN(&s.psock);  PSOCK_READTO(&s.psock, ISO_nl);     if(strncmp(s.inputbuffer, smtp_220, 3) != 0) {    PSOCK_CLOSE(&s.psock);    smtp_done(2);    PSOCK_EXIT(&s.psock);  }    PSOCK_SEND_STR(&s.psock, (char *)smtp_helo);  PSOCK_SEND_STR(&s.psock, localhostname);  PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);  PSOCK_READTO(&s.psock, ISO_nl);    if(s.inputbuffer[0] != ISO_2) {    PSOCK_CLOSE(&s.psock);    smtp_done(3);    PSOCK_EXIT(&s.psock);  }  PSOCK_SEND_STR(&s.psock, (char *)smtp_mail_from);  PSOCK_SEND_STR(&s.psock, s.from);  PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);  PSOCK_READTO(&s.psock, ISO_nl);    if(s.inputbuffer[0] != ISO_2) {    PSOCK_CLOSE(&s.psock);    smtp_done(4);    PSOCK_EXIT(&s.psock);  }  PSOCK_SEND_STR(&s.psock, (char *)smtp_rcpt_to);  PSOCK_SEND_STR(&s.psock, s.to);  PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);  PSOCK_READTO(&s.psock, ISO_nl);    if(s.inputbuffer[0] != ISO_2) {    PSOCK_CLOSE(&s.psock);    smtp_done(5);    PSOCK_EXIT(&s.psock);  }    if(s.cc != 0) {    PSOCK_SEND_STR(&s.psock, (char *)smtp_rcpt_to);    PSOCK_SEND_STR(&s.psock, s.cc);    PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);    PSOCK_READTO(&s.psock, ISO_nl);      if(s.inputbuffer[0] != ISO_2) {      PSOCK_CLOSE(&s.psock);      smtp_done(6);      PSOCK_EXIT(&s.psock);    }  }    PSOCK_SEND_STR(&s.psock, (char *)smtp_data);    PSOCK_READTO(&s.psock, ISO_nl);    if(s.inputbuffer[0] != ISO_3) {    PSOCK_CLOSE(&s.psock);    smtp_done(7);    PSOCK_EXIT(&s.psock);  }  PSOCK_SEND_STR(&s.psock, (char *)smtp_to);  PSOCK_SEND_STR(&s.psock, s.to);  PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);    if(s.cc != 0) {    PSOCK_SEND_STR(&s.psock, (char *)smtp_cc);    PSOCK_SEND_STR(&s.psock, s.cc);    PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);  }    PSOCK_SEND_STR(&s.psock, (char *)smtp_from);  PSOCK_SEND_STR(&s.psock, s.from);  PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);    PSOCK_SEND_STR(&s.psock, (char *)smtp_subject);  PSOCK_SEND_STR(&s.psock, s.subject);  PSOCK_SEND_STR(&s.psock, (char *)smtp_crnl);  PSOCK_SEND(&s.psock, s.msg, s.msglen);    PSOCK_SEND_STR(&s.psock, (char *)smtp_crnlperiodcrnl);  PSOCK_READTO(&s.psock, ISO_nl);  if(s.inputbuffer[0] != ISO_2) {    PSOCK_CLOSE(&s.psock);    smtp_done(8);    PSOCK_EXIT(&s.psock);  }  PSOCK_SEND_STR(&s.psock, (char *)smtp_quit);  smtp_done(SMTP_ERR_OK);  PSOCK_END(&s.psock);}/*---------------------------------------------------------------------------*/voidsmtp_appcall(void){  if(uip_closed()) {    s.connected = 0;    return;  }  if(uip_aborted() || uip_timedout()) {    s.connected = 0;    smtp_done(1);    return;  }  smtp_thread();}/*---------------------------------------------------------------------------*//** * 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. * * \param lhostname The hostname of the uIP host. * * \param server A pointer to a 4-byte array representing the IP * address of the SMTP server to be configured. */voidsmtp_configure(char *lhostname, void *server){  localhostname = lhostname;  uip_ipaddr_copy(smtpserver, server);}/*---------------------------------------------------------------------------*//** * Send an e-mail. * * \param to The e-mail address of the receiver of the e-mail. * \param cc The e-mail address of the CC: receivers of the e-mail. * \param from The e-mail address of the sender of the e-mail. * \param subject The subject of the e-mail. * \param msg The actual e-mail message. * \param msglen The length of the e-mail message. */unsigned charsmtp_send(char *to, char *cc, char *from,	  char *subject, char *msg, u16_t msglen){  struct uip_conn *conn;  conn = uip_connect(smtpserver, HTONS(25));  if(conn == NULL) {    return 0;  }  s.connected = 1;  s.to = to;  s.cc = cc;  s.from = from;  s.subject = subject;  s.msg = msg;  s.msglen = msglen;  PSOCK_INIT(&s.psock, s.inputbuffer, sizeof(s.inputbuffer));    return 1;}/*---------------------------------------------------------------------------*/voidsmtp_init(void){  s.connected = 0;}/*---------------------------------------------------------------------------*//** @} *//** @} */