static void
capa_user (const char *name, struct pop3d_session *session)
{
if (state == INITIAL)
pop3d_outf ("XTLSREQUIRED\n");
else
pop3d_outf ("USER\n");
}
int
pop3d_capa (char *arg, struct pop3d_session *sess)
{
if (strlen (arg) != 0)
return ERR_BAD_ARGS;
pop3d_outf ("+OK Capability list follows\n");
mu_list_foreach (sess->capa, print_capa, sess);
pop3d_outf (".\n");
return OK;
}
static void
capa_stls (const char *name, struct pop3d_session *session)
{
if ((session->tls == tls_ondemand || session->tls == tls_required)
&& tls_available && tls_done == 0)
pop3d_outf ("%s\n", name);
}
int
pop3d_uidl (char *arg, struct pop3d_session *sess)
{
size_t mesgno;
char uidl[128];
mu_message_t msg;
mu_attribute_t attr;
if (state != TRANSACTION)
return ERR_WRONG_STATE;
if (strchr (arg, ' ') != NULL)
return ERR_BAD_ARGS;
if (strlen (arg) == 0)
{
size_t total = 0;
pop3d_outf ("+OK\n");
mu_mailbox_messages_count (mbox, &total);
for (mesgno = 1; mesgno <= total; mesgno++)
{
mu_mailbox_get_message (mbox, mesgno, &msg);
mu_message_get_attribute (msg, &attr);
if (!pop3d_is_deleted (attr))
{
mu_message_get_uidl (msg, uidl, sizeof (uidl), NULL);
pop3d_outf ("%s %s\n", mu_umaxtostr (0, mesgno), uidl);
}
}
pop3d_outf (".\n");
}
else
{
mesgno = strtoul (arg, NULL, 10);
if (mu_mailbox_get_message (mbox, mesgno, &msg) != 0)
return ERR_NO_MESG;
mu_message_get_attribute (msg, &attr);
if (pop3d_is_deleted (attr))
return ERR_MESG_DELE;
mu_message_get_uidl (msg, uidl, sizeof (uidl), NULL);
pop3d_outf ("+OK %s %s\n", mu_umaxtostr (0, mesgno), uidl);
}
return OK;
}
static int
print_capa (void *item, void *data)
{
struct pop3d_capa *cp = item;
struct pop3d_session *session = data;
if (cp->type == capa_func)
{
cp->value.func (cp->name, session);
}
else
{
pop3d_outf ("%s", cp->name);
if (cp->value.string)
pop3d_outf ("%s", cp->value.string);
pop3d_outf ("\n");
}
return 0;
}
void
login_delay_capa ()
{
DBM_FILE db;
if (login_delay && open_stat_db (&db, MU_STREAM_RDWR) == 0)
{
pop3d_outf ("LOGIN-DELAY %s\r\n", mu_umaxtostr (0, login_delay));
mu_dbm_close (db);
}
}
int
pop3d_stat (char *arg)
{
size_t mesgno;
size_t size = 0;
size_t lines = 0;
size_t total = 0;
size_t num = 0;
size_t tsize = 0;
mu_message_t msg = NULL;
mu_attribute_t attr = NULL;
if (strlen (arg) != 0)
return ERR_BAD_ARGS;
if (state != TRANSACTION)
return ERR_WRONG_STATE;
/* rfc1939: if the POP3 server host internally represents end-of-line as a
single character, then the POP3 server simply counts each occurrence of
this character in a message as two octets. */
mu_mailbox_messages_count (mbox, &total);
for (mesgno = 1; mesgno <= total; mesgno++)
{
mu_mailbox_get_message (mbox, mesgno, &msg);
mu_message_get_attribute (msg, &attr);
/* rfc1939: Note that messages marked as deleted are not counted in
either total. */
if (!pop3d_is_deleted (attr))
{
mu_message_size (msg, &size);
mu_message_lines (msg, &lines);
tsize += size + lines;
num++;
}
}
pop3d_outf ("+OK %s %s\r\n", mu_umaxtostr (0, num), mu_umaxtostr (1, tsize));
return OK;
}
static void
capa_implementation (const char *name, struct pop3d_session *session)
{
if (state == TRANSACTION) /* let's not advertise to just anyone */
pop3d_outf ("%s %s\n", name, PACKAGE_STRING);
}
/* The main part of the daemon. This function reads input from the client and
executes the proper functions. Also handles the bulk of error reporting.
Arguments:
ifd -- input descriptor
ofd -- output descriptor
tls -- initiate encrypted connection */
int
pop3d_mainloop (int ifd, int ofd, enum tls_mode tls)
{
int status = OK;
char buffer[512];
static int sigtab[] = { SIGILL, SIGBUS, SIGFPE, SIGSEGV, SIGSTOP, SIGPIPE,
SIGABRT, SIGINT, SIGQUIT, SIGTERM, SIGHUP, SIGALRM };
struct pop3d_session session;
mu_set_signals (pop3d_child_signal, sigtab, MU_ARRAY_SIZE (sigtab));
if (tls == tls_unspecified)
tls = tls_available ? tls_ondemand : tls_no;
else if (tls != tls_no && !tls_available)
{
mu_error (_("TLS is not configured, but requested in the "
"configuration"));
tls = tls_no;
}
pop3d_setio (ifd, ofd, tls == tls_connection);
if (tls == tls_required)
initial_state = INITIAL;
state = tls == tls_connection ? AUTHORIZATION : initial_state;
pop3d_session_init (&session);
session.tls = tls;
/* FIXME: state should also be in the session? */
/* Prepare the shared secret for APOP. */
{
char *local_hostname;
status = mu_get_host_name (&local_hostname);
if (status)
{
mu_diag_funcall (MU_DIAG_ERROR, "mu_get_host_name", NULL, status);
exit (EXIT_FAILURE);
}
md5shared = mu_alloc (strlen (local_hostname) + 51);
snprintf (md5shared, strlen (local_hostname) + 50, "<%u.%u@%s>", getpid (),
(unsigned)time (NULL), local_hostname);
free (local_hostname);
}
/* Lets boogie. */
pop3d_outf ("+OK POP3 Ready %s\n", md5shared);
while (state != UPDATE && state != ABORT)
{
char *buf;
char *arg, *cmd;
pop3d_command_handler_t handler;
pop3d_flush_output ();
status = OK;
buf = pop3d_readline (buffer, sizeof (buffer));
pop3d_parse_command (buf, &cmd, &arg);
if (state == TRANSACTION && !mu_mailbox_is_updated (mbox))
{
static mu_off_t mailbox_size;
mu_off_t newsize = 0;
mu_mailbox_get_size (mbox, &newsize);
/* Did we shrink? First time save the size. */
if (!mailbox_size)
mailbox_size = newsize;
else if (newsize < mailbox_size) /* FIXME: Should it be a != ? */
pop3d_abquit (ERR_MBOX_SYNC); /* Out of sync, Bail out. */
}
/* Refresh the Lock. */
manlock_touchlock (mbox);
if ((handler = pop3d_find_command (cmd)) != NULL)
status = handler (arg, &session);
else
status = ERR_BAD_CMD;
if (status != OK)
pop3d_outf ("-ERR %s\n", pop3d_error_string (status));
}
pop3d_session_free (&session);
pop3d_bye ();
return status;
}