/* notify.c -- Module to notify of new mail
*
* Copyright (c) 1994-2008 Carnegie Mellon University. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name "Carnegie Mellon University" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For permission or any legal
* details, please contact
* Carnegie Mellon University
* Center for Technology Transfer and Enterprise Creation
* 4615 Forbes Avenue
* Suite 302
* Pittsburgh, PA 15213
* (412) 268-7393, fax: (412) 268-7395
* innovation@andrew.cmu.edu
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Computing Services
* at Carnegie Mellon University (http://www.cmu.edu/computing/)."
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* $Id: notify.c,v 1.17 2010/01/06 17:01:38 murch Exp $
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/un.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "global.h"
#include "notify.h"
#include "xmalloc.h"
#include "xstrlcpy.h"
#include "xstrlcat.h"
#define FNAME_NOTIFY_SOCK "/socket/notify"
#define NOTIFY_MAXSIZE 8192
static int add_arg(char *buf, int max_size, const char *arg, int *buflen)
{
const char *myarg = (arg ? arg : "");
int len = strlen(myarg) + 1;
if (*buflen + len > max_size) return -1;
strcat(buf+*buflen, myarg);
*buflen += len;
return 0;
}
void notify(const char *method,
const char *class, const char *priority,
const char *user, const char *mailbox,
int nopt, const char **options,
const char *message)
{
const char *notify_sock;
int soc;
struct sockaddr_un sun_data;
char buf[NOTIFY_MAXSIZE] = "", noptstr[20];
int buflen = 0;
int i, r = 0;
soc = socket(AF_UNIX, SOCK_DGRAM, 0);
if (soc == -1) {
syslog(LOG_ERR, "unable to create notify socket(): %m");
return;
}
memset((char *)&sun_data, 0, sizeof(sun_data));
sun_data.sun_family = AF_UNIX;
notify_sock = config_getstring(IMAPOPT_NOTIFYSOCKET);
if (notify_sock) {
strlcpy(sun_data.sun_path, notify_sock, sizeof(sun_data.sun_path));
}
else {
strlcpy(sun_data.sun_path, config_dir, sizeof(sun_data.sun_path));
strlcat(sun_data.sun_path,
FNAME_NOTIFY_SOCK, sizeof(sun_data.sun_path));
}
/*
* build request of the form:
*
* method NUL class NUL priority NUL user NUL mailbox NUL
* nopt NUL N(option NUL) message NUL
*/
r = add_arg(buf, sizeof(buf), method, &buflen);
if (!r) r = add_arg(buf, sizeof(buf), class, &buflen);
if (!r) r = add_arg(buf, sizeof(buf), priority, &buflen);
if (!r) r = add_arg(buf, sizeof(buf), user, &buflen);
if (!r) r = add_arg(buf, sizeof(buf), mailbox, &buflen);
snprintf(noptstr, sizeof(noptstr), "%d", nopt);
if (!r) r = add_arg(buf, sizeof(buf), noptstr, &buflen);
for (i = 0; !r && i < nopt; i++) {
r = add_arg(buf, sizeof(buf), options[i], &buflen);
}
if (!r) r = add_arg(buf, sizeof(buf), message, &buflen);
if (r) {
syslog(LOG_ERR, "notify datagram too large, %s, %s",
user, mailbox);
close(soc);
return;
}
r = sendto(soc, buf, buflen, 0,
(struct sockaddr *)&sun_data, sizeof(sun_data));
if (r < buflen) {
syslog(LOG_ERR, "unable to sendto() notify socket: %m");
return;
}
close(soc);
return;
}