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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2003, 2005-2007, 2009-2012 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/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/time.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <mailutils/cctype.h>
#include <mailutils/message.h>
#include <mailutils/header.h>
#include <mailutils/datetime.h>
#include <mailutils/util.h>
#include <mailutils/io.h>
#include <mailutils/envelope.h>
#include <mailutils/errno.h>
#include <mailutils/argcv.h>
#define ST_INIT 0
#define ST_MSGID 1
static int
strip_message_id (const char *msgid, char **pval)
{
const char *p;
char *q;
int state;
*pval = malloc (strlen (msgid) + 1);
if (!*pval)
return ENOMEM;
state = ST_INIT;
for (p = msgid, q = *pval; *p; p++)
{
switch (state)
{
case ST_INIT:
if (*p == '<')
{
*q++ = *p;
state = ST_MSGID;
}
else if (mu_isspace (*p))
*q++ = *p;
break;
case ST_MSGID:
*q++ = *p;
if (*p == '>')
state = ST_INIT;
break;
}
}
*q = 0;
return 0;
}
static int
get_msgid_header (mu_header_t hdr, const char *name, char **val)
{
const char *p;
int status = mu_header_sget_value (hdr, name, &p);
if (status)
return status;
return strip_message_id (p, val);
}
/* rfc2822:
The "References:" field will contain the contents of the parent's
"References:" field (if any) followed by the contents of the parent's
"Message-ID:" field (if any). If the parent message does not contain
a "References:" field but does have an "In-Reply-To:" field
containing a single message identifier, then the "References:" field
will contain the contents of the parent's "In-Reply-To:" field
followed by the contents of the parent's "Message-ID:" field (if
any). If the parent has none of the "References:", "In-Reply-To:",
or "Message-ID:" fields, then the new message will have no
References:" field. */
int
mu_rfc2822_references (mu_message_t msg, char **pstr)
{
char *argv[3] = { NULL, NULL, NULL };
mu_header_t hdr;
int rc;
rc = mu_message_get_header (msg, &hdr);
if (rc)
return rc;
get_msgid_header (hdr, MU_HEADER_MESSAGE_ID, &argv[1]);
if (get_msgid_header (hdr, MU_HEADER_REFERENCES, &argv[0]))
get_msgid_header (hdr, MU_HEADER_IN_REPLY_TO, &argv[0]);
if (argv[0] && argv[1])
{
rc = mu_argcv_join (2, argv, " ", mu_argcv_escape_no, pstr);
free (argv[0]);
free (argv[1]);
}
else if (argv[0])
*pstr = argv[0];
else if (argv[1])
*pstr = argv[1];
else
rc = MU_ERR_FAILURE;
return rc;
}
int
mu_rfc2822_msg_id (int subpart, char **pval)
{
char date[4+2+2+2+2+2+1];
time_t t = time (NULL);
struct tm *tm = localtime (&t);
char *host;
char *p;
mu_strftime (date, sizeof date, "%Y%m%d%H%M%S", tm);
mu_get_host_name (&host);
if (subpart)
{
struct timeval tv;
gettimeofday (&tv, NULL);
mu_asprintf (&p, "<%s.%lu.%d@%s>",
date,
(unsigned long) getpid (),
subpart,
host);
}
else
mu_asprintf (&p, "<%s.%lu@%s>", date, (unsigned long) getpid (), host);
free (host);
*pval = p;
return 0;
}
#define COMMENT "Your message of "
/*
The "In-Reply-To:" field will contain the contents of the "Message-
ID:" field of the message to which this one is a reply (the "parent
message"). If there is more than one parent message, then the "In-
Reply-To:" field will contain the contents of all of the parents'
"Message-ID:" fields. If there is no "Message-ID:" field in any of
the parent messages, then the new message will have no "In-Reply-To:"
field.
*/
int
mu_rfc2822_in_reply_to (mu_message_t msg, char **pstr)
{
const char *argv[] = { NULL, NULL, NULL, NULL, NULL };
mu_header_t hdr;
int rc;
int idx = 0;
rc = mu_message_get_header (msg, &hdr);
if (rc)
return rc;
if (mu_header_sget_value (hdr, MU_HEADER_DATE, &argv[idx + 1]))
{
mu_envelope_t envelope = NULL;
mu_message_get_envelope (msg, &envelope);
mu_envelope_sget_date (envelope, &argv[idx + 1]);
}
if (argv[idx + 1])
{
argv[idx] = COMMENT;
idx = 2;
}
if (mu_header_sget_value (hdr, MU_HEADER_MESSAGE_ID, &argv[idx]) == 0)
{
if (idx > 1)
{
argv[idx + 1] = argv[idx];
argv[idx] = "\n\t";
idx++;
}
idx++;
}
if (idx > 1)
rc = mu_argcv_join (idx, (char**) argv, "", mu_argcv_escape_no, pstr);
else
rc = MU_ERR_FAILURE;
return rc;
}
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