pop3_response.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003, 2007, 2010 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <mailutils/cctype.h>
#include <mailutils/cstr.h>
#include <mailutils/sys/pop3.h>
#define POP3_DEFERR "-ERR POP3 IO ERROR"
/* If we did not grap the ack already, call pop3_readline() but handle
Nonblocking also. */
int
mu_pop3_response (mu_pop3_t pop3, size_t *pnread)
{
size_t n = 0;
int status = 0;
if (pop3 == NULL)
return EINVAL;
if (!MU_POP3_FISSET (pop3, MU_POP3_ACK))
{
status = mu_stream_getline (pop3->carrier, &pop3->ackbuf,
&pop3->acksize, NULL);
if (status == 0)
{
n = mu_rtrim_class (pop3->ackbuf, MU_CTYPE_SPACE);
MU_POP3_FSET (pop3, MU_POP3_ACK); /* Flag that we have the ack. */
}
else
{
/* Provide them with an error. */
if (pop3->acksize < sizeof (POP3_DEFERR))
{
char *p = realloc (pop3->ackbuf, sizeof (POP3_DEFERR));
if (p)
{
pop3->ackbuf = p;
pop3->acksize = sizeof (POP3_DEFERR);
}
}
if (pop3->ackbuf)
strncpy (pop3->ackbuf, POP3_DEFERR, pop3->acksize);
}
}
else if (pop3->ackbuf)
n = strlen (pop3->ackbuf);
if (n < 3)
status = MU_ERR_BADREPLY;
else if (strncmp (pop3->ackbuf, "-ERR", 4) == 0)
status = MU_ERR_REPLY;
else if (strncmp (pop3->ackbuf, "+OK", 3))
status = MU_ERR_BADREPLY;
if (pnread)
*pnread = n;
return status;
}