/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-smtp-transport.c : class for a smtp transport */
/*
* Authors:
* Jeffrey Stedfast <fejj@stampede.org>
*
* Copyright (C) 2000 Helix Code, Inc. (www.helixcode.com)
*
* 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
*/
#include "config.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "camel-smtp-transport.h"
#include "camel-mime-message.h"
#include "camel-stream-buffer.h"
#include "camel-stream-fs.h"
#include "camel-session.h"
#include "camel-exception.h"
#include "md5-utils.h"
#include "url-util.h"
/* Specified in RFC ???? */
#define SMTP_PORT 25
static CamelServiceClass *service_class = NULL;
/* camel smtp transport class prototypes */
static gboolean _can_send (CamelTransport *transport, CamelMedium *message);
static gboolean _send (CamelTransport *transport, CamelMedium *message, CamelException *ex);
static gboolean _send_to (CamelTransport *transport, CamelMedium *message, GList *recipients, CamelException *ex);
/* support prototypes */
static gboolean smtp_connect (CamelService *service, CamelException *ex);
static gboolean smtp_disconnect (CamelService *service, CamelException *ex);
static void esmtp_get_authtypes(gchar *buffer);
static GList *query_auth_types (CamelService *service);
static void free_auth_types (CamelService *service, GList *authtypes);
static gchar *smtp_get_email_addr_from_text (gchar *text);
static gboolean smtp_helo (CamelSmtpTransport *transport, CamelException *ex);
static gboolean smtp_mail (CamelSmtpTransport *transport, gchar *sender, CamelException *ex);
static gboolean smtp_rcpt (CamelSmtpTransport *transport, gchar *recipient, CamelException *ex);
static gboolean smtp_data (CamelSmtpTransport *transport, gchar *message, CamelException *ex);
static gboolean smtp_rset (CamelSmtpTransport *transport, CamelException *ex);
static gboolean smtp_quit (CamelSmtpTransport *transport, CamelException *ex);
static gboolean smtp_is_esmtp = FALSE;
static GList *esmtp_supported_authtypes = NULL;
static void
camel_smtp_transport_class_init (CamelSmtpTransportClass *camel_smtp_transport_class)
{
CamelTransportClass *camel_transport_class =
CAMEL_TRANSPORT_CLASS (camel_smtp_transport_class);
CamelServiceClass *camel_service_class =
CAMEL_SERVICE_CLASS (camel_smtp_store_class);
/* virtual method overload */
camel_service_class->connect = smtp_connect;
camel_service_class->disconnect = smtp_disconnect;
camel_service_class->query_auth_types = query_auth_types;
camel_service_class->free_auth_types = free_auth_types;
camel_transport_class->can_send = _can_send;
camel_transport_class->send = _send;
camel_transport_class->send_to = _send_to;
}
GtkType
camel_smtp_transport_get_type (void)
{
static GtkType camel_smtp_transport_type = 0;
if (!camel_smtp_transport_type) {
GtkTypeInfo camel_smtp_transport_info =
{
"CamelSmtpTransport",
sizeof (CamelSmtpTransport),
sizeof (CamelSmtpTransportClass),
(GtkClassInitFunc) camel_smtp_transport_class_init,
(GtkObjectInitFunc) NULL,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
camel_smtp_transport_type = gtk_type_unique (CAMEL_TRANSPORT_TYPE, &camel_smtp_transport_info);
}
return camel_smtp_transport_type;
}
static gboolean
smtp_connect (CamelService *service, CamelException *ex)
{
struct hostent *h;
struct sockaddr_in sin;
gint port, fd, status;
gchar *buf, *pass;
CamelSmtpStore *transport = CAMEL_SMTP_TRANSPORT (service);
if (!service_class->connect (service, ex))
return FALSE;
h = camel_service_gethost (service, ex);
if (!h)
return FALSE;
port = camel_service_getport (service, "smtp", SMTP_PORT, "tcp", ex);
if (port == -1)
return FALSE;
sin.sin_family = h->h_addrtype;
sin.sin_port = port;
memcpy (&sin.sin_addr, h->h_addr, sizeof (sin.sin_addr));
fd = socket (h->h_addrtype, SOCK_STREAM, 0);
if (fd == -1 || connect (fd, (struct sockaddr *)&sin, sizeof(sin)) == -1)
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SERVICE_UNAVAILABLE,
"Could not connect to %s (port %s): %s",
service->url->host, service->url->port,
strerror(errno));
if (fd > -1)
close (fd);
g_free (pass);
return FALSE;
}
transport->ostream = camel_stream_fs_new_with_fd (fd);
transport->istream = camel_stream_buffer_new (store->ostream,
CAMEL_STREAM_BUFFER_READ);
/* Read the greeting, note whether the server is ESMTP and if it requests AUTH. */
do
{
/* Check for "220" */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "220", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"Welcome response error: "
"%s: possibly non-fatal",
g_strerror (errno));
return FALSE;
}
if (strstr(respbuf, "ESMTP"))
smtp_is_esmtp = TRUE;
if (smtp_is_esmtp && strstr(respbuf, "AUTH"))
{
/* parse for supported AUTH types */
esmtp_get_authtypes(respbuf);
}
} while ( *(respbuf+3) == '-' ); /* if we got "220-" then loop again */
g_free(respbuf);
/* send HELO */
smtp_helo(service, ex);
return TRUE;
}
static gboolean
smtp_disconnect (CamelService *service, CamelException *ex)
{
CamelSmtpTransport *transport = CAMEL_SMTP_TRANSPORT (service);
if (!service->connected)
return TRUE;
/* send the QUIT command to the SMTP server */
smtp_quit(service, ex);
if (!service_class->disconnect (service, ex))
return FALSE;
/* Closing the buffered write stream will close the
* unbuffered read stream wrapped inside it as well.
*/
camel_stream_close (transport->ostream);
gtk_object_unref (GTK_OBJECT (transport->ostream));
store->ostream = NULL;
store->istream = NULL;
return TRUE;
}
static GList
esmtp_get_authtypes(gchar *buffer)
{
GList *ret = NULL;
return ret;
}
static CamelServiceAuthType password_authtype = {
"Password/CRAM-MD5",
"This option will connect to the ESMTP server using the CRAM-MD5 "
"authentication if possible.",
"",
TRUE
};
static GList
*query_auth_types (CamelService *service)
{
GList *ret;
ret = g_list_append (NULL, &password_authtype);
return ret;
}
static void
free_auth_types (CamelService *service, GList *authtypes)
{
g_list_free (authtypes);
}
static gboolean
_can_send (CamelTransport *transport, CamelMedium *message)
{
return CAMEL_IS_MIME_MESSAGE (message);
}
static gboolean
_send_to (CamelTransport *transport, CamelMedium *message,
GList *recipients, CamelException *ex)
{
GList *r, *s;
gchar *recipient;
gboolean status;
guint i, len;
CamelService *service = CAMEL_SERVICE (transport);
if (!camel_service_is_connected (service))
smtp_connect (service, ex);
s = camel_mime_message_get_recipients ((CamelMimeMessage *) message, "From");
if (!s)
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"Cannot send message: "
"sender address not defined.");
return FALSE;
}
else
smtp_mail(service, s->data, ex);
g_list_free(s);
if (!(len = g_list_length(recipients)))
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"Cannot send message: "
"no recipients defined.");
return FALSE;
}
for (i = 0, r = recipients; i < len; i++, r = r->next)
{
recipient = smtp_get_addr_from_text(r->data);
if (!smtp_rcpt(service, recipient; ex))
{
g_free(recipient);
return FALSE;
}
g_free(recipient);
}
if (!smtp_data(service, message, ex))
return FALSE;
/* reset the service for our next transfer session */
smtp_rset(service, ex);
return status;
}
static gboolean
_send (CamelTransport *transport, CamelMedium *message,
CamelException *ex)
{
GList *recipients;
recipients = camel_mime_message_get_recipients ((CamelMimeMessage *) message, "To");
recipients = g_list_append(recipients,
camel_mime_message_get_recipients ((CamelMimeMessage *) message, "Cc");
recipients = g_list_append(recipients,
camel_mime_message_get_recipients ((CamelMimeMessage *) message, "Bcc");
return _send_to (transport, message, recipients, ex);
}
static gchar
*smtp_get_email_addr_from_text (gchar *text)
{
/* get the actual email address from the string passed and place it in addr
* we can assume the address will be in one of the following forms:
* 1) The Name <person@host.com>
* 2) <person@host.com>
* 3) person@host.com
* 4) person@host.com (The Name)
*/
gchar *tmp, *addr = NULL;
gchar *addr_strt; /* points to start of addr */
gchar *addr_end; /* points to end of addr */
gchar *ptr1, *ptr2;
/* check the incoming args */
if (!text || !*text)
return NULL;
/* scan the string for an open brace */
for (addr_strt = text; *addr_strt; addr_strt++)
if (*addr_strt == '<')
break;
if (*addr_strt) /* we found an open brace */
{
/* let's look for it's counterpart */
for (addr_end = addr_strt; *addr_end; addr_end++)
if (*addr_end == '>')
break;
/* if we didn't find it, or braces are empty... */
if (!(*addr_end) || (addr_strt == addr_end - 1))
return NULL;
/* addr_strt points to '<' and addr_end points to '>'.
* Now let's adjust 'em slightly to point to the beginning
* and ending of the email addy
*/
addr_strt++;
addr_end--;
}
else /* no open brace...assume type 3 or 4? */
{
addr_strt = text;
/* find the end of the email addr/string */
for (addr_end = addr_strt; *addr_end || *addr_end == ' '; addr_end++);
addr_end--; /* points to NULL, move it back one char */
}
/* now addr_strt & addr_end point to the beginning & ending of the email addy */
/* copy the string into addr */
addr = g_strndup(addr_strt, (gint)(addr_end - addr_strt));
for (ptr1 = addr_strt; ptr1 <= addr_end; ptr1++) /* look for an '@' sign */
if (*ptr1 == '@')
break;
if (*ptr1 != '@')
{
/* here we found out the name doesn't have an '@' part
* let's figure out what machine we're on & stick it on the end
* woops.. forgot the '@' sign, gotta stick that in the reply
* ptr2 should still point to the next place to copy to in addr
*/
gchar hostname[MAXHOSTNAMELEN];
if (gethostname(hostname, MAXHOSTNAMELEN))
{
g_free(addr);
return NULL;
}
tmp = addr;
addr = g_strconcat(tmp, "@", hostname, NULL);
g_free(tmp);
}
else /* there's an @ sign already in the email addy */
*ptr2 = '\0'; /* add a null to the end of the string */
return addr;
}
static gboolean
smtp_helo (CamelSmtpTransport *transport, CamelException *ex)
{
/* say hello to the server */
gchar *cmdbuf, *respbuf = NULL;
gchar localhost[MAXHOSTNAMELEN + MAXHOSTNAMELEN + 2];
gchar domainname[MAXHOSTNAMELEN];
gint n;
/* get the localhost name */
memset(localhost, 0, sizeof(localhost));
gethostname (localhost, MAXHOSTNAMELEN);
memset(domainname, 0, sizeof(domainname));
getdomainname(domainname, MAXHOSTNAMELEN);
if (*domainname && strcmp(domainname, "(none)"))
{
strcat(localhost, ".");
strcat(localhost, domainname);
}
/* hiya server! how are you today? */
if (smtp_is_esmtp)
cmdbuf = g_strdup_printf ("EHLO %s\r\n", localhost);
else
cmdbuf = g_strdup_printf ("HELO %s\r\n", localhost);
if ( camel_stream_write (transport->ostream, cmdbuf, strlen(cmdbuf)) == -1)
{
g_free(cmdbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"HELO request timed out: "
"%s: non-fatal",
g_strerror (errno));
return FALSE;
}
g_free(cmdbuf);
do
{
/* Check for "250" */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "250", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"HELO response error: "
"%s: non-fatal",
g_strerror (errno));
return FALSE;
}
} while ( *(respbuf+3) == '-' ); /* if we got "250-" then loop again */
g_free(respbuf);
return TRUE;
}
static gboolean
smtp_mail (CamelSmtpTransport *transport, gchar *sender, CamelException *ex)
{
/* we gotta tell the smtp server who we are. (our email addy) */
gchar *cmdbuf, *respbuf = NULL;
/* enclose address in <>'s since some SMTP daemons *require* that */
cmdbuf = g_strdup_printf("MAIL FROM: <%s>\r\n", sender);
if ( camel_stream_write (transport->ostream, cmdbuf, strlen(cmdbuf)) == -1)
{
g_free(cmdbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"MAIL FROM request timed out: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
g_free(cmdbuf);
do
{
/* Check for "250 Sender OK..." */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "250", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"MAIL FROM response error: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
} while ( *(respbuf+3) == '-' ); /* if we got "250-" then loop again */
g_free(respbuf);
return TRUE;
}
static gboolean
smtp_rcpt (CamelSmtpTransport *transport, gchar *recipient, CamelException *ex)
{
/* we gotta tell the smtp server who we are going to be sending
* our email to */
gchar *cmdbuf, *respbuf = NULL;
/* enclose address in <>'s since some SMTP daemons *require* that */
cmdbuf = g_strdup_printf("RCPT TO: <%s>\r\n", recipient);
if ( camel_stream_write (transport->ostream, cmdbuf, strlen(cmdbuf)) == -1)
{
g_free(cmdbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"RCPT TO request timed out: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
g_free(cmdbuf);
do
{
/* Check for "250 Sender OK..." */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "250", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"RCPT TO response error: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
} while ( *(respbuf+3) == '-' ); /* if we got "250-" then loop again */
g_free(respbuf);
return TRUE;
}
static gboolean
smtp_data (CamelSmtpTransport *transport, gchar *message, CamelException *ex)
{
/* now we can actually send what's important :p */
gchar *cmdbuf, *respbuf = NULL;
gchar *tmp, *chunk, *begin, *end;
/* enclose address in <>'s since some SMTP daemons *require* that */
cmdbuf = g_strdup("DATA\r\n");
if ( camel_stream_write (transport->ostream, cmdbuf, strlen(cmdbuf)) == -1)
{
g_free(cmdbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"DATA request timed out: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
g_free(cmdbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "354", 3) )
{
/* we should have gotten instructions on how to use the DATA command:
* 354 Enter mail, end with "." on a line by itself
*/
g_free(respbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"DATA response error: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
/* now to send the actual data */
for (begin = message; *begin; begin++)
{
/* send 1 line at a time */
for (end = begin; *end && *end != '\n'; end++);
end--;
tmp = g_strndup(begin, (gint)(end - begin));
/* check for a lone '.' */
if (!strcmp(tmp, "."))
chunk = g_strconcat(tmp, ".\r\n", NULL);
else
chunk = g_strconcat(tmp, "\r\n", NULL);
g_free(tmp);
/* write the line */
if ( camel_stream_write (transport->ostream, chunk, strlen(chunk)) == -1)
{
g_free(chunk);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"DATA send timed out: message body: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
g_free(chunk);
}
/* terminate the message body */
if ( camel_stream_write (transport->ostream, "\r\n.\r\n", 5) == -1)
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"DATA send timed out: message termination: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
do
{
/* Check for "250 Sender OK..." */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "250", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"DATA response error: message termination: "
"%s: mail not sent",
g_strerror (errno));
return FALSE;
}
} while ( *(respbuf+3) == '-' ); /* if we got "250-" then loop again */
g_free(respbuf);
return TRUE;
}
static gboolean
smtp_rset (CamelSmtpTransport *transport, CamelException *ex)
{
/* we are going to reset the smtp server (just to be nice) */
gchar *cmdbuf, *respbuf = NULL;
cmdbuf = g_strdup ("RSET\r\n");
if ( camel_stream_write (transport->ostream, cmdbuf, strlen(cmdbuf)) == -1)
{
g_free(cmdbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"RSET request timed out: "
"%s",
g_strerror (errno));
return FALSE;
}
g_free(cmdbuf);
do
{
/* Check for "250" */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "250", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"RSET response error: "
"%s",
g_strerror (errno));
return FALSE;
}
} while ( *(respbuf+3) == '-' ); /* if we got "250-" then loop again */
g_free(respbuf);
return TRUE;
}
static gboolean
smtp_quit (CamelSmtpTransport *transport, CamelException *ex)
{
/* we are going to reset the smtp server (just to be nice) */
gchar *cmdbuf, *respbuf = NULL;
cmdbuf = g_strdup ("QUIT\r\n");
if ( camel_stream_write (transport->ostream, cmdbuf, strlen(cmdbuf)) == -1)
{
g_free(cmdbuf);
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"QUIT request timed out: "
"%s: non-fatal",
g_strerror (errno));
return FALSE;
}
g_free(cmdbuf);
do
{
/* Check for "221" */
g_free(respbuf);
respbuf = camel_stream_buffer_read_line (CAMEL_STREAM_BUFFER (transport->istream));
if ( !respbuf || strncmp(respbuf, "221", 3) )
{
camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
"QUIT response error: "
"%s: non-fatal",
g_strerror (errno));
return FALSE;
}
} while ( *(respbuf+3) == '-' ); /* if we got "221-" then loop again */
g_free(respbuf);
return TRUE;
}
