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/*
* odmr.c -- ODMR protocol methods (see RFC 2645)
*
* For license terms, see the file COPYING in this directory.
*/
#include "config.h"
#ifdef ODMR_ENABLE
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#ifdef HAVE_STRING_H /* strcat() */
#include <string.h>
#endif
#ifdef HAVE_NET_SOCKET_H /* BeOS needs this */
#include <net/socket.h>
#endif
#include <sys/types.h>
#include <sys/time.h>
#ifdef HAVE_NET_SELECT_H /* AIX needs this */
#include <net/select.h>
#endif
#include <netdb.h>
#include <errno.h>
#include <unistd.h>
#include "i18n.h"
#include "fetchmail.h"
#include "smtp.h"
#include "socket.h"
static int odmr_ok (int sock, char *argbuf)
/* parse command response */
{
int ok;
ok = SMTP_ok(sock);
if (ok == SM_UNRECOVERABLE)
return(PS_PROTOCOL);
else
return(ok);
}
static int odmr_getrange(int sock, struct query *ctl, const char *id,
int *countp, int *newp, int *bytes)
/* send ODMR and then run a reverse SMTP session */
{
int ok, opts, smtp_sock;
char buf [MSGBUFSIZE+1];
struct idlist *qnp; /* pointer to Q names */
if ((ok = SMTP_ehlo(sock, fetchmailhost, &opts)))
{
report(stderr, _("%s's SMTP listener does not support ESMTP\n"),
ctl->server.pollname);
return(ok);
}
else if (!(opts & ESMTP_ATRN))
{
report(stderr, _("%s's SMTP listener does not support ATRN\n"),
ctl->server.pollname);
return(PS_PROTOCOL);
}
/* make sure we don't enter the fetch loop */
*bytes = *countp = *newp = -1;
/* authenticate via CRAM-MD5 */
ok = do_cram_md5(sock, "AUTH", ctl, "334 ");
if (ok)
return(ok);
/*
* By default, the hostlist has a single entry, the fetchmail host's
* canonical DNS name.
*/
buf[0] = '\0';
for (qnp = ctl->smtphunt; qnp; qnp = qnp->next)
if (strlen(buf) + strlen(qnp->id) + 1 >= sizeof(buf))
break;
else
{
strcat(buf, qnp->id);
strcat(buf, ",");
}
buf[strlen(buf) - 1] = '\0'; /* nuke final comma */
/* ship the domain list and get turnaround */
gen_send(sock, "ATRN %s", buf);
if ((ok = gen_recv(sock, buf, sizeof(buf))))
return(ok);
/* this switch includes all response codes described in RFC2645 */
switch(atoi(buf))
{
case 250: /* OK, turnaround is about to happe */
if (outlevel >= O_SILENT)
report(stdout, _("Turnaround now...\n"));
break;
case 450: /* ATRN request refused */
if (outlevel >= O_SILENT)
report(stdout, _("ATRN request refused.\n"));
return(PS_PROTOCOL);
case 451: /* Unable to process ATRN request now */
report(stderr, _("Unable to process ATRN request now\n"));
return(PS_EXCLUDE);
case 453: /* You have no mail */
report(stderr, _("You have no mail.\n"));
return(PS_NOMAIL);
case 502: /* Command not implemented */
report(stderr, _("Command not implemented\n"));
return(PS_PROTOCOL);
case 530: /* Authentication required */
report(stderr, _("Authentication required.\n"));
return(PS_AUTHFAIL);
default:
report(stderr, _("Unknown ODMR error %d\n"), atoi(buf));
return(PS_PROTOCOL);
}
/*
* OK, if we got here it's time to become a pipe between the ODMR
* remote server (sending) and the local SMTP daemon (receiving).
* We're npt going to try to be a protocol machine; instead, we'll
* use select(2) to watch the read sides of both sockets and just
* throw their data at each other.
*/
/*
* FIXME: we hardcode "localhost" here because ODMR is fighting
* over the ETRN meaning of smtphost and the POP/IMAP meaning.
* ODMR needs both meanings, but there is only one config var. So
* for now ODMR always uses the "localhost" SMTP server to connect
* with locally.
*/
smtp_sock = SockOpen("localhost", SMTP_PORT, NULL, NULL);
if (smtp_sock == -1)
return(PS_SOCKET);
else
{
int maxfd = (sock > smtp_sock) ? sock : smtp_sock;
for (;;)
{
fd_set readfds;
struct timeval timeout;
char buf[MSGBUFSIZE];
FD_ZERO(&readfds);
FD_SET(sock, &readfds);
FD_SET(smtp_sock, &readfds);
timeout.tv_sec = ctl->server.timeout;
timeout.tv_usec = 0;
if (select(maxfd+1, &readfds, NULL, NULL, &timeout) == -1)
return(PS_PROTOCOL); /* timeout */
if (FD_ISSET(sock, &readfds))
{
int n = SockRead(sock, buf, sizeof(buf));
if (n <= 0)
break;
SockWrite(smtp_sock, buf, n);
if (outlevel >= O_MONITOR)
report(stdout, "ODMR< %s\n", buf);
}
if (FD_ISSET(smtp_sock, &readfds))
{
int n = SockRead(smtp_sock, buf, sizeof(buf));
if (n <= 0)
break;
SockWrite(sock, buf, n);
if (outlevel >= O_MONITOR)
report(stdout, "ODMR> %s\n", buf);
}
}
SockClose(smtp_sock);
}
return(0);
}
static int odmr_logout(int sock, struct query *ctl)
/* send logout command */
{
return(gen_transact(sock, "QUIT"));
}
const static struct method odmr =
{
"ODMR", /* ODMR protocol */
#if INET6_ENABLE
"odmr", /* standard SMTP port */
"odmrs", /* ssl SMTP port */
#else /* INET6_ENABLE */
366, /* standard SMTP port */
2366, /* ssl SMTP port (BOGUS! RANDOM VALUE) */
#endif /* INET6_ENABLE */
FALSE, /* this is not a tagged protocol */
FALSE, /* this does not use a message delimiter */
odmr_ok, /* parse command response */
NULL, /* no need to get authentication */
odmr_getrange, /* initialize message sending */
NULL, /* we cannot get a list of sizes */
NULL, /* how do we tell a message is old? */
NULL, /* no way to fetch headers */
NULL, /* no way to fetch body */
NULL, /* no message trailer */
NULL, /* how to delete a message */
odmr_logout, /* log out, we're done */
FALSE, /* no, we can't re-poll */
};
int doODMR (struct query *ctl)
/* retrieve messages using ODMR */
{
int status;
if (ctl->keep) {
fprintf(stderr, _("Option --keep is not supported with ODMR\n"));
return(PS_SYNTAX);
}
if (ctl->flush) {
fprintf(stderr, _("Option --flush is not supported with ODMR\n"));
return(PS_SYNTAX);
}
if (ctl->mailboxes->id) {
fprintf(stderr, _("Option --remote is not supported with ODMR\n"));
return(PS_SYNTAX);
}
if (check_only) {
fprintf(stderr, _("Option --check is not supported with ODMR\n"));
return(PS_SYNTAX);
}
peek_capable = FALSE;
status = do_protocol(ctl, &odmr);
if (status == PS_NOMAIL)
status = PS_SUCCESS;
return(status);
}
#endif /* ODMR_ENABLE */
/* odmr.c ends here */
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