![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/notify_email.c b/src/notify_email.c
--- /dev/null
+++ b/src/notify_email.c
@@ -0,0 +1,326 @@
+/**
+ * collectd - src/notify_email.c
+ * Copyright (C) 2008 Oleg King
+ * Copyright (C) 2010 Florian Forster
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Oleg King <king2 at kaluga.ru>
+ * Florian Forster <octo at collectd.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#include <auth-client.h>
+#include <libesmtp.h>
+#include <pthread.h>
+
+#define MAXSTRING 256
+
+static const char *config_keys[] =
+{
+ "SMTPServer",
+ "SMTPPort",
+ "SMTPUser",
+ "SMTPPassword",
+ "From",
+ "Recipient",
+ "Subject"
+};
+static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
+
+static char **recipients;
+static int recipients_len = 0;
+
+static smtp_session_t session;
+static pthread_mutex_t session_lock = PTHREAD_MUTEX_INITIALIZER;
+static smtp_message_t message;
+static auth_context_t authctx = NULL;
+
+static int smtp_port = 25;
+static char *smtp_host = NULL;
+static char *smtp_user = NULL;
+static char *smtp_password = NULL;
+static char *email_from = NULL;
+static char *email_subject = NULL;
+
+#define DEFAULT_SMTP_HOST "localhost"
+#define DEFAULT_SMTP_FROM "root@localhost"
+#define DEFAULT_SMTP_SUBJECT "Collectd notify: %s@%s"
+
+/* Callback to get username and password */
+static int authinteract (auth_client_request_t request, char **result,
+ int fields, void __attribute__((unused)) *arg)
+{
+ int i;
+ for (i = 0; i < fields; i++)
+ {
+ if (request[i].flags & AUTH_USER)
+ result[i] = smtp_user;
+ else if (request[i].flags & AUTH_PASS)
+ result[i] = smtp_password;
+ else
+ return 0;
+ }
+ return 1;
+} /* int authinteract */
+
+/* Callback to print the recipient status */
+static void print_recipient_status (smtp_recipient_t recipient,
+ const char *mailbox, void __attribute__((unused)) *arg)
+{
+ const smtp_status_t *status;
+
+ status = smtp_recipient_status (recipient);
+ if (status->text[strlen(status->text) - 2] == '\r')
+ status->text[strlen(status->text) - 2] = 0;
+ INFO ("notify_email: notify sent to %s: %d %s", mailbox, status->code,
+ status->text);
+} /* void print_recipient_status */
+
+/* Callback to monitor SMTP activity */
+static void monitor_cb (const char *buf, int buflen, int writing,
+ void __attribute__((unused)) *arg)
+{
+ char log_str[MAXSTRING];
+
+ sstrncpy (log_str, buf, sizeof (log_str));
+ if (buflen > 2)
+ log_str[buflen - 2] = 0; /* replace \n with \0 */
+
+ if (writing == SMTP_CB_HEADERS) {
+ DEBUG ("notify_email plugin: SMTP --- H: %s", log_str);
+ return;
+ }
+ DEBUG (writing
+ ? "notify_email plugin: SMTP >>> C: %s"
+ : "notify_email plugin: SMTP <<< S: %s",
+ log_str);
+} /* void monitor_cb */
+
+static int notify_email_init (void)
+{
+ char server[MAXSTRING];
+
+ ssnprintf(server, sizeof (server), "%s:%i",
+ (smtp_host == NULL) ? DEFAULT_SMTP_HOST : smtp_host,
+ smtp_port);
+
+ pthread_mutex_lock (&session_lock);
+
+ auth_client_init();
+
+ session = smtp_create_session ();
+ if (session == NULL) {
+ pthread_mutex_unlock (&session_lock);
+ ERROR ("notify_email plugin: cannot create SMTP session");
+ return (-1);
+ }
+
+ smtp_set_monitorcb (session, monitor_cb, NULL, 1);
+ smtp_set_hostname (session, hostname_g);
+ smtp_set_server (session, server);
+
+ if (smtp_user && smtp_password) {
+ authctx = auth_create_context ();
+ auth_set_mechanism_flags (authctx, AUTH_PLUGIN_PLAIN, 0);
+ auth_set_interact_cb (authctx, authinteract, NULL);
+ }
+
+ if ( !smtp_auth_set_context (session, authctx)) {
+ pthread_mutex_unlock (&session_lock);
+ ERROR ("notify_email plugin: cannot set SMTP auth context");
+ return (-1);
+ }
+
+ pthread_mutex_unlock (&session_lock);
+ return (0);
+} /* int notify_email_init */
+
+static int notify_email_shutdown (void)
+{
+ pthread_mutex_lock (&session_lock);
+
+ if (session != NULL)
+ smtp_destroy_session (session);
+ session = NULL;
+
+ if (authctx != NULL)
+ auth_destroy_context (authctx);
+ authctx = NULL;
+
+ auth_client_exit();
+
+ pthread_mutex_unlock (&session_lock);
+ return (0);
+} /* int notify_email_shutdown */
+
+static int notify_email_config (const char *key, const char *value)
+{
+ if (strcasecmp (key, "Recipient") == 0)
+ {
+ char **tmp;
+
+ tmp = (char **) realloc ((void *) recipients, (recipients_len + 1) * sizeof (char *));
+ if (tmp == NULL) {
+ ERROR ("notify_email: realloc failed.");
+ return (-1);
+ }
+
+ recipients = tmp;
+ recipients[recipients_len] = strdup (value);
+ if (recipients[recipients_len] == NULL) {
+ ERROR ("notify_email: strdup failed.");
+ return (-1);
+ }
+ recipients_len++;
+ }
+ else if (0 == strcasecmp (key, "SMTPServer")) {
+ sfree (smtp_host);
+ smtp_host = strdup (value);
+ }
+ else if (0 == strcasecmp (key, "SMTPPort")) {
+ int port_tmp = atoi (value);
+ if (port_tmp < 1 || port_tmp > 65535)
+ {
+ WARNING ("notify_email plugin: Invalid SMTP port: %i", port_tmp);
+ return (1);
+ }
+ smtp_port = port_tmp;
+ }
+ else if (0 == strcasecmp (key, "SMTPUser")) {
+ sfree (smtp_user);
+ smtp_user = strdup (value);
+ }
+ else if (0 == strcasecmp (key, "SMTPPassword")) {
+ sfree (smtp_password);
+ smtp_password = strdup (value);
+ }
+ else if (0 == strcasecmp (key, "From")) {
+ sfree (email_from);
+ email_from = strdup (value);
+ }
+ else if (0 == strcasecmp (key, "Subject")) {
+ sfree (email_subject);
+ email_subject = strdup (value);
+ }
+ else {
+ return -1;
+ }
+ return 0;
+} /* int notify_email_config (const char *, const char *) */
+
+static int notify_email_notification (const notification_t *n,
+ user_data_t __attribute__((unused)) *user_data)
+{
+
+ time_t tt;
+ struct tm timestamp_tm;
+ char timestamp_str[64];
+
+ char severity[32];
+ char subject[MAXSTRING];
+
+ char buf[4096] = "";
+ int buf_len = sizeof (buf);
+ int i;
+
+ ssnprintf (severity, sizeof (severity), "%s",
+ (n->severity == NOTIF_FAILURE) ? "FAILURE"
+ : ((n->severity == NOTIF_WARNING) ? "WARNING"
+ : ((n->severity == NOTIF_OKAY) ? "OKAY" : "UNKNOWN")));
+
+ ssnprintf (subject, sizeof (subject),
+ (email_subject == NULL) ? DEFAULT_SMTP_SUBJECT : email_subject,
+ severity, n->host);
+
+ tt = CDTIME_T_TO_TIME_T (n->time);
+ localtime_r (&tt, ×tamp_tm);
+ strftime (timestamp_str, sizeof (timestamp_str), "%Y-%m-%d %H:%M:%S",
+ ×tamp_tm);
+ timestamp_str[sizeof (timestamp_str) - 1] = '\0';
+
+ /* Let's make RFC822 message text with \r\n EOLs */
+ ssnprintf (buf, buf_len,
+ "MIME-Version: 1.0\r\n"
+ "Content-Type: text/plain; charset=\"US-ASCII\"\r\n"
+ "Content-Transfer-Encoding: 8bit\r\n"
+ "Subject: %s\r\n"
+ "\r\n"
+ "%s - %s@%s\r\n"
+ "\r\n"
+ "Message: %s",
+ subject,
+ timestamp_str,
+ severity,
+ n->host,
+ n->message);
+
+ pthread_mutex_lock (&session_lock);
+
+ if (session == NULL) {
+ /* Initialization failed or we're in the process of shutting down. */
+ pthread_mutex_unlock (&session_lock);
+ return (-1);
+ }
+
+ if (!(message = smtp_add_message (session))) {
+ pthread_mutex_unlock (&session_lock);
+ ERROR ("notify_email plugin: cannot set SMTP message");
+ return (-1);
+ }
+ smtp_set_reverse_path (message, email_from);
+ smtp_set_header (message, "To", NULL, NULL);
+ smtp_set_message_str (message, buf);
+
+ for (i = 0; i < recipients_len; i++)
+ smtp_add_recipient (message, recipients[i]);
+
+ /* Initiate a connection to the SMTP server and transfer the message. */
+ if (!smtp_start_session (session)) {
+ char buf[MAXSTRING];
+ ERROR ("notify_email plugin: SMTP server problem: %s",
+ smtp_strerror (smtp_errno (), buf, sizeof buf));
+ pthread_mutex_unlock (&session_lock);
+ return (-1);
+ } else {
+ #if COLLECT_DEBUG
+ const smtp_status_t *status;
+ /* Report on the success or otherwise of the mail transfer. */
+ status = smtp_message_transfer_status (message);
+ DEBUG ("notify_email plugin: SMTP server report: %d %s",
+ status->code, (status->text != NULL) ? status->text : "\n");
+ #endif
+ smtp_enumerate_recipients (message, print_recipient_status, NULL);
+ }
+
+ pthread_mutex_unlock (&session_lock);
+ return (0);
+} /* int notify_email_notification */
+
+void module_register (void)
+{
+ plugin_register_init ("notify_email", notify_email_init);
+ plugin_register_shutdown ("notify_email", notify_email_shutdown);
+ plugin_register_config ("notify_email", notify_email_config,
+ config_keys, config_keys_num);
+ plugin_register_notification ("notify_email", notify_email_notification,
+ /* user_data = */ NULL);
+} /* void module_register (void) */
+
+/* vim: set sw=2 sts=2 ts=8 et : */