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// nullmailer -- a simple relay-only MTA
// Copyright (C) 1999-2003 Bruce Guenter <bruceg@em.ca>
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// You can contact me at <bruceg@em.ca>. There is also a mailing list
// available to discuss this package. To subscribe, send an email to
// <nullmailer-subscribe@lists.em.ca>.
#include "config.h"
#include <stdlib.h>
#include <unistd.h>
#include "connect.h"
#include "errcodes.h"
#include "fdbuf/fdbuf.h"
#include "itoa.h"
#include "mystring/mystring.h"
#include "protocol.h"
int port = 25;
const char* cli_program = "smtp";
const char* cli_help_prefix = "Send an email message via SMTP\n";
class smtp
{
fdibuf in;
fdobuf out;
public:
smtp(int fd);
~smtp();
int get(mystring& str);
int put(mystring cmd, mystring& result);
void docmd(mystring cmd, int range, bool show_succ=false);
void send_data(fdibuf* msg);
void send_envelope(fdibuf* msg);
void send(fdibuf* msg);
};
smtp::smtp(int fd)
: in(fd), out(fd)
{
}
smtp::~smtp()
{
}
int smtp::get(mystring& str)
{
mystring tmp;
str = "";
int code = -1;
while(in.getline(tmp)) {
if(tmp[tmp.length()-1] == '\r')
tmp = tmp.left(tmp.length()-1);
code = atoi(tmp.c_str());
if(!!str)
str += "/";
str += tmp;
if(tmp[3] != '-')
break;
}
return code;
}
int smtp::put(mystring cmd, mystring& result)
{
out << cmd << "\r\n";
if(!out.flush())
return -1;
return get(result);
}
void smtp::docmd(mystring cmd, int range, bool show_succ)
{
mystring msg;
int code;
if(!cmd)
code = get(msg);
else
code = put(cmd, msg);
if(code < range || code >= (range+100)) {
int e;
if(code >= 500)
e = ERR_MSG_PERMFAIL;
else if(code >= 400)
e = ERR_MSG_TEMPFAIL;
else
e = ERR_PROTO;
protocol_fail(e, msg.c_str());
}
else if(show_succ)
protocol_succ(msg.c_str());
}
void smtp::send_envelope(fdibuf* msg)
{
mystring tmp;
msg->getline(tmp);
docmd("MAIL FROM: <" + tmp + ">", 200);
while(msg->getline(tmp) && !!tmp)
docmd("RCPT TO: <" + tmp + ">", 200);
}
void smtp::send_data(fdibuf* msg)
{
docmd("DATA", 300);
mystring tmp;
while(msg->getline(tmp)) {
if((tmp[0] == '.' && !(out << ".")) ||
!(out << tmp << "\r\n"))
protocol_fail(ERR_MSG_WRITE, "Error sending message to remote");
}
docmd(".", 200, true);
}
void smtp::send(fdibuf* msg)
{
send_envelope(msg);
send_data(msg);
}
void protocol_prep(fdibuf*)
{
}
void protocol_send(fdibuf* in, int fd)
{
mystring hh = getenv("HELOHOST");
if (!hh) protocol_fail(1, "$HELOHOST is not set");
smtp conn(fd);
conn.docmd("", 200);
conn.docmd("HELO " + hh, 200);
conn.send(in);
}
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