capa.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2001, 2003, 2007 Free Software Foundation, Inc.
GNU Mailutils 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 3, or (at your option)
any later version.
GNU Mailutils 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 GNU Mailutils; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301 USA */
#include "pop3d.h"
/*
The CAPA Command
The POP3 CAPA command returns a list of capabilities supported by the
POP3 server. It is available in both the AUTHORIZATION and
TRANSACTION states.
Capabilities available in the AUTHORIZATION state MUST be announced
in both states. */
int
pop3d_capa (const char *arg)
{
if (strlen (arg) != 0)
return ERR_BAD_ARGS;
if (state != initial_state && state != TRANSACTION)
return ERR_WRONG_STATE;
pop3d_outf ("+OK Capability list follows\r\n");
pop3d_outf ("TOP\r\n");
pop3d_outf ("USER\r\n");
pop3d_outf ("UIDL\r\n");
pop3d_outf ("RESP-CODES\r\n");
pop3d_outf ("PIPELINING\r\n");
#ifdef WITH_TLS
if (tls_available && tls_done == 0)
pop3d_outf ("STLS\r\n");
#endif /* WITH_TLS */
login_delay_capa ();
/* This can be implemented by setting an header field on the message. */
if (expire < 0)
pop3d_outf ("EXPIRE NEVER\r\n");
else
pop3d_outf ("EXPIRE %s\r\n", mu_umaxtostr (0, expire));
if (state == INITIAL)
pop3d_outf ("XTLSREQUIRED\r\n");
if (state == TRANSACTION) /* let's not advertise to just anyone */
pop3d_outf ("IMPLEMENTATION %s\r\n", PACKAGE_STRING);
pop3d_outf (".\r\n");
return OK;
}