/**
* 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
*
* 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>
-#define MAXSTRING 256
+#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 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 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"
+#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++)
- {
+static int authinteract(auth_client_request_t request, char **result,
+ int fields, void __attribute__((unused)) * arg) {
+ for (int i = 0; i < fields; i++) {
if (request[i].flags & AUTH_USER)
result[i] = smtp_user;
else if (request[i].flags & AUTH_PASS)
} /* int authinteract */
/* Callback to print the recipient status */
-static void print_recipient_status (smtp_recipient_t recipient,
- const char *mailbox, void __attribute__((unused)) *arg)
-{
+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);
+ 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);
+ 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)
-{
+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));
+ 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);
+ 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);
+ 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)
-{
+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();
- if (!(session = smtp_create_session ())) {
- ERROR ("notify_email plugin: cannot create SMTP session");
+
+ 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);
- ssnprintf(server, sizeof (server), "%s:%i",
- (smtp_host == NULL) ? DEFAULT_SMTP_HOST : smtp_host,
- smtp_port);
- smtp_set_server (session, server);
+ 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);
+ 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)) {
- ERROR ("notify_email plugin: cannot set SMTP auth context");
- return (-1);
+ 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)
-{
- smtp_destroy_session (session);
- auth_destroy_context (authctx);
+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)
- {
+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 *));
+ tmp = realloc(recipients, (recipients_len + 1) * sizeof(char *));
if (tmp == NULL) {
- ERROR ("notify_email: realloc failed.");
+ ERROR("notify_email: realloc failed.");
return (-1);
}
recipients = tmp;
- recipients[recipients_len] = strdup (value);
+ recipients[recipients_len] = strdup(value);
if (recipients[recipients_len] == NULL) {
- ERROR ("notify_email: strdup failed.");
+ 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);
+ } 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 {
+ } 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)
-{
- smtp_recipient_t recipient;
+static int notify_email_notification(const notification_t *n,
+ user_data_t __attribute__((unused)) *
+ user_data) {
struct tm timestamp_tm;
char timestamp_str[64];
char subject[MAXSTRING];
char buf[4096] = "";
- int buf_len = sizeof (buf);
+ 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(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);
+ ssnprintf(subject, sizeof(subject),
+ (email_subject == NULL) ? DEFAULT_SMTP_SUBJECT : email_subject,
+ severity, n->host);
- localtime_r (&n->time, ×tamp_tm);
- strftime (timestamp_str, sizeof (timestamp_str), "%Y-%m-%d %H:%M:%S",
- ×tamp_tm);
- timestamp_str[sizeof (timestamp_str) - 1] = '\0';
+ localtime_r(&CDTIME_T_TO_TIME_T(n->time), ×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;\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);
-
- if (!(message = smtp_add_message (session))) {
- ERROR ("notify_email plugin: cannot set SMTP message");
- return (-1);
+ 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);
}
- smtp_set_reverse_path (message, email_from);
- smtp_set_header (message, "To", NULL, NULL);
- smtp_set_message_str (message, buf);
+
+ 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++)
- recipient = smtp_add_recipient (message, recipients[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));
+ if (!smtp_start_session(session)) {
+ 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");
- smtp_enumerate_recipients (message, print_recipient_status, NULL);
+ 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);
+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 : */