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/*
* Copyright (c) 2011 Red Hat
*
* All rights reserved.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* This software licensed under BSD license, the text of which follows:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - 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.
* - Neither the name of the MontaVista Software, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/types.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <poll.h>
#include <signal.h>
#include <syslog.h>
#include <corosync/corotypes.h>
#include <corosync/totem/coropoll.h>
#include <corosync/confdb.h>
#include <corosync/cfg.h>
#include <corosync/quorum.h>
/*
* generic declarations
*/
enum {
CS_NTF_LOG,
CS_NTF_STDOUT,
CS_NTF_SNMP,
CS_NTF_DBUS,
CS_NTF_FG,
CS_NTF_MAX,
};
static int conf[CS_NTF_MAX];
static int32_t _cs_is_quorate = 0;
typedef void (*node_membership_fn_t)(char *nodename, uint32_t nodeid, char *state, char* ip);
typedef void (*node_quorum_fn_t)(char *nodename, uint32_t nodeid, const char *state);
typedef void (*application_connection_fn_t)(char *nodename, uint32_t nodeid, char *app_name, const char *state);
struct notify_callbacks {
node_membership_fn_t node_membership_fn;
node_quorum_fn_t node_quorum_fn;
application_connection_fn_t application_connection_fn;
};
#define MAX_NOTIFIERS 5
static int num_notifiers = 0;
static struct notify_callbacks notifiers[MAX_NOTIFIERS];
static uint32_t local_nodeid = 0;
static char local_nodename[CS_MAX_NAME_LENGTH];
static hdb_handle_t poll_handle;
static quorum_handle_t quorum_handle;
static void _cs_node_membership_event(char *nodename, uint32_t nodeid, char *state, char* ip);
static void _cs_node_quorum_event(const char *state);
static void _cs_application_connection_event(char *app_name, const char *state);
#ifdef HAVE_DBUS
#include <dbus/dbus.h>
/*
* dbus
*/
#define DBUS_CS_NAME "org.corosync"
#define DBUS_CS_IFACE "org.corosync"
#define DBUS_CS_PATH "/org/corosync"
static DBusConnection *db = NULL;
static char _err[512];
static int err_set = 0;
static void _cs_dbus_init(void);
#endif /* HAVE_DBUS */
#ifdef ENABLE_SNMP
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/snmpv3_api.h>
#include <net-snmp/agent/agent_trap.h>
#include <net-snmp/library/mib.h>
#include <net-snmp/library/snmp_api.h>
#include <net-snmp/library/snmp_client.h>
#include <net-snmp/library/snmp_debug.h>
enum snmp_node_status {
SNMP_NODE_STATUS_UNKNOWN = 0,
SNMP_NODE_STATUS_JOINED = 1,
SNMP_NODE_STATUS_LEFT = 2
};
#define SNMP_OID_COROSYNC "1.3.6.1.4.1.35488"
#define SNMP_OID_OBJECT_ROOT SNMP_OID_COROSYNC ".1"
#define SNMP_OID_OBJECT_NODE_NAME SNMP_OID_OBJECT_ROOT ".1"
#define SNMP_OID_OBJECT_NODE_ID SNMP_OID_OBJECT_ROOT ".2"
#define SNMP_OID_OBJECT_NODE_STATUS SNMP_OID_OBJECT_ROOT ".3"
#define SNMP_OID_OBJECT_NODE_ADDR SNMP_OID_OBJECT_ROOT ".4"
#define SNMP_OID_OBJECT_RINGSEQ SNMP_OID_OBJECT_ROOT ".20"
#define SNMP_OID_OBJECT_QUORUM SNMP_OID_OBJECT_ROOT ".21"
#define SNMP_OID_OBJECT_APP_NAME SNMP_OID_OBJECT_ROOT ".40"
#define SNMP_OID_OBJECT_APP_STATUS SNMP_OID_OBJECT_ROOT ".41"
#define SNMP_OID_TRAPS_ROOT SNMP_OID_COROSYNC ".0"
#define SNMP_OID_TRAPS_NODE SNMP_OID_TRAPS_ROOT ".1"
#define SNMP_OID_TRAPS_QUORUM SNMP_OID_TRAPS_ROOT ".2"
#define SNMP_OID_TRAPS_APP SNMP_OID_TRAPS_ROOT ".3"
#define CS_TIMESTAMP_STR_LEN 20
static const char *local_host = "localhost";
#endif /* ENABLE_SNMP */
static char snmp_manager_buf[CS_MAX_NAME_LENGTH];
static char *snmp_manager = NULL;
/*
* confdb
*/
#define SEPERATOR_STR "."
static confdb_handle_t confdb_handle;
static void _cs_confdb_key_changed(confdb_handle_t handle,
confdb_change_type_t change_type,
hdb_handle_t parent_object_handle,
hdb_handle_t object_handle,
const void *object_name, size_t object_name_len,
const void *key_name, size_t key_name_len,
const void *key_value, size_t key_value_len);
static void _cs_confdb_object_created(confdb_handle_t handle,
hdb_handle_t parent_object_handle,
hdb_handle_t object_handle,
const void *name_pt, size_t name_len);
static void _cs_confdb_object_deleted(confdb_handle_t handle,
hdb_handle_t parent_object_handle,
const void *name_pt, size_t name_len);
static confdb_callbacks_t callbacks = {
.confdb_key_change_notify_fn = _cs_confdb_key_changed,
.confdb_object_create_change_notify_fn = _cs_confdb_object_created,
.confdb_object_delete_change_notify_fn = _cs_confdb_object_deleted,
};
static int32_t _cs_ip_to_hostname(char* ip, char* name_out)
{
struct sockaddr_in sa;
int rc;
if (strchr(ip, ':') == NULL) {
sa.sin_family = AF_INET;
} else {
sa.sin_family = AF_INET6;
}
rc = inet_pton(sa.sin_family, ip, &sa.sin_addr);
if (rc == 0) {
return -EINVAL;
}
rc = getnameinfo((struct sockaddr*)&sa, sizeof(sa),
name_out, CS_MAX_NAME_LENGTH, NULL, 0, 0);
if (rc != 0) {
syslog (LOG_ERR, "error looking up %s : %s\n", ip, gai_strerror(rc));
return -EINVAL;
}
return 0;
}
static void
_cs_confdb_key_changed(confdb_handle_t handle,
confdb_change_type_t change_type,
hdb_handle_t parent_object_handle,
hdb_handle_t object_handle,
const void *object_name_pt, size_t object_name_len,
const void *key_name_pt, size_t key_name_len,
const void *key_value_pt, size_t key_value_len)
{
char parent_name[CS_MAX_NAME_LENGTH];
size_t len = 0;
hdb_handle_t real_parent_object_handle;
cs_error_t rc = CS_OK;
char nodename[CS_MAX_NAME_LENGTH];
char nodeid_str[CS_MAX_NAME_LENGTH];
uint32_t nodeid;
char status[CS_MAX_NAME_LENGTH];
char ip[CS_MAX_NAME_LENGTH];
size_t ip_len;
confdb_value_types_t type;
char* open_bracket = NULL;
char* close_bracket = NULL;
rc = confdb_object_parent_get (handle,
parent_object_handle, &real_parent_object_handle);
assert(rc == CS_OK);
rc = confdb_object_name_get (handle,
real_parent_object_handle,
parent_name,
&len);
parent_name[len] = '\0';
assert(rc == CS_OK);
if (strcmp(parent_name, "members") == 0) {
if (strncmp(key_name_pt, "status", strlen("status")) == 0) {
memcpy(nodeid_str, object_name_pt, object_name_len);
nodeid_str[object_name_len] = '\0';
nodeid = atoi(nodeid_str);
memcpy(status, key_value_pt, key_value_len);
status[key_value_len] = '\0';
rc = confdb_key_get_typed(handle, parent_object_handle,
"ip", ip, &ip_len, &type);
assert(rc == CS_OK);
ip[ip_len-1] = '\0';
/*
* We want the ip out of: "r(0) ip(192.168.100.92)"
*/
open_bracket = strrchr(ip, '(');
open_bracket++;
close_bracket = strrchr(open_bracket, ')');
*close_bracket = '\0';
_cs_ip_to_hostname(open_bracket, nodename);
_cs_node_membership_event(nodename, nodeid, status, open_bracket);
}
}
}
static void
_cs_confdb_object_created(confdb_handle_t handle,
hdb_handle_t parent_object_handle,
hdb_handle_t object_handle,
const void *name_pt,
size_t name_len)
{
char parent_name[CS_MAX_NAME_LENGTH];
size_t len = 0;
char obj_name[CS_MAX_NAME_LENGTH];
cs_error_t rc = CS_OK;
memcpy(obj_name, name_pt, name_len);
obj_name[name_len] = '\0';
rc = confdb_object_name_get (handle,
object_handle, parent_name, &len);
parent_name[len] = '\0';
if (rc != CS_OK) {
return;
}
if (strcmp(parent_name, "connections") == 0) {
_cs_application_connection_event(obj_name, "connected");
}
}
static void
_cs_confdb_object_deleted(confdb_handle_t handle,
hdb_handle_t parent_object_handle,
const void *name_pt,
size_t name_len)
{
char obj_name[CS_MAX_NAME_LENGTH];
char parent_name[CS_MAX_NAME_LENGTH];
size_t len = 0;
cs_error_t rc;
memcpy(obj_name, name_pt, name_len);
obj_name[name_len] = '\0';
rc = confdb_object_name_get (handle,
parent_object_handle, parent_name, &len);
parent_name[len] = '\0';
assert(rc == CS_OK);
if (strcmp(parent_name, "connections") == 0) {
_cs_application_connection_event(obj_name, "disconnected");
}
}
static cs_error_t
_cs_confdb_find_object (confdb_handle_t handle,
const char * name_pt,
hdb_handle_t * out_handle)
{
char * obj_name_pt;
char * save_pt;
hdb_handle_t obj_handle;
confdb_handle_t parent_object_handle = OBJECT_PARENT_HANDLE;
char tmp_name[CS_MAX_NAME_LENGTH];
cs_error_t res = CS_OK;
strncpy (tmp_name, name_pt, sizeof (tmp_name));
tmp_name[sizeof (tmp_name) - 1] = '\0';
obj_name_pt = strtok_r(tmp_name, SEPERATOR_STR, &save_pt);
while (obj_name_pt != NULL) {
res = confdb_object_find_start(handle, parent_object_handle);
if (res != CS_OK) {
syslog (LOG_ERR, "Could not start object_find %d\n", res);
exit (EXIT_FAILURE);
}
res = confdb_object_find(handle, parent_object_handle,
obj_name_pt, strlen (obj_name_pt), &obj_handle);
if (res != CS_OK) {
return res;
}
parent_object_handle = obj_handle;
obj_name_pt = strtok_r (NULL, SEPERATOR_STR, &save_pt);
}
*out_handle = parent_object_handle;
return res;
}
static int
_cs_confdb_dispatch(hdb_handle_t handle,
int fd, int revents, void *data)
{
confdb_dispatch(confdb_handle, CS_DISPATCH_ONE);
return 0;
}
static void _cs_quorum_notification(quorum_handle_t handle,
uint32_t quorate, uint64_t ring_seq,
uint32_t view_list_entries, uint32_t *view_list)
{
if (_cs_is_quorate == quorate) {
return;
}
_cs_is_quorate = quorate;
if (quorate) {
_cs_node_quorum_event("quorate");
} else {
_cs_node_quorum_event("not quorate");
}
}
static int
_cs_quorum_dispatch(hdb_handle_t handle,
int fd, int revents, void *data)
{
quorum_dispatch(quorum_handle, CS_DISPATCH_ONE);
return 0;
}
static void
_cs_quorum_init(void)
{
cs_error_t rc;
int fd;
quorum_callbacks_t quorum_callbacks = {
.quorum_notify_fn = _cs_quorum_notification,
};
rc = quorum_initialize (&quorum_handle, &quorum_callbacks);
if (rc != CS_OK) {
syslog(LOG_ERR, "Could not connect to corosync(quorum)");
return;
}
quorum_fd_get(quorum_handle, &fd);
poll_dispatch_add (poll_handle, fd, POLLIN|POLLNVAL, NULL,
_cs_quorum_dispatch);
quorum_trackstart(quorum_handle, CS_TRACK_CHANGES);
}
static void
_cs_quorum_finalize(void)
{
quorum_finalize (quorum_handle);
}
#ifdef HAVE_DBUS
/*
* dbus notifications
*/
static void
_cs_dbus_auto_flush(void)
{
dbus_connection_ref(db);
dbus_connection_read_write(db, 500);
dbus_connection_unref(db);
}
static void
_cs_dbus_release(void)
{
DBusError err;
if (!db)
return;
dbus_error_init(&err);
dbus_bus_release_name(db, DBUS_CS_NAME, &err);
dbus_error_free(&err);
dbus_connection_unref(db);
db = NULL;
}
static void
_cs_dbus_node_quorum_event(char *nodename, uint32_t nodeid, const char *state)
{
DBusMessage *msg = NULL;
int ret = -1;
if (err_set) {
syslog (LOG_ERR, "%s\n", _err);
err_set = 0;
}
if (!db) {
goto out_free;
}
if (dbus_connection_get_is_connected(db) != TRUE) {
err_set = 1;
snprintf(_err, sizeof(_err), "DBus connection lost");
_cs_dbus_release();
goto out_unlock;
}
_cs_dbus_auto_flush();
if (!(msg = dbus_message_new_signal(DBUS_CS_PATH,
DBUS_CS_IFACE,
"QuorumStateChange"))) {
syslog (LOG_ERR, "%s(%d) error\n", __func__, __LINE__);
goto out_unlock;
}
if (!dbus_message_append_args(msg,
DBUS_TYPE_STRING, &nodename,
DBUS_TYPE_UINT32, &nodeid,
DBUS_TYPE_STRING, &state,
DBUS_TYPE_INVALID)) {
syslog (LOG_ERR, "%s(%d) error\n", __func__, __LINE__);
goto out_unlock;
}
dbus_connection_send(db, msg, NULL);
ret = 0;
out_unlock:
if (ret == -1) {
syslog (LOG_ERR, "%s() error\n", __func__);
}
if (msg)
dbus_message_unref(msg);
out_free:
return;
}
static void
_cs_dbus_node_membership_event(char *nodename, uint32_t nodeid, char *state, char* ip)
{
DBusMessage *msg = NULL;
int ret = -1;
if (err_set) {
syslog (LOG_ERR, "%s\n", _err);
err_set = 0;
}
if (!db) {
goto out_free;
}
if (dbus_connection_get_is_connected(db) != TRUE) {
err_set = 1;
snprintf(_err, sizeof(_err), "DBus connection lost");
_cs_dbus_release();
goto out_unlock;
}
_cs_dbus_auto_flush();
if (!(msg = dbus_message_new_signal(DBUS_CS_PATH,
DBUS_CS_IFACE,
"NodeStateChange"))) {
syslog (LOG_ERR, "%s(%d) error\n", __func__, __LINE__);
goto out_unlock;
}
if (!dbus_message_append_args(msg,
DBUS_TYPE_STRING, &nodename,
DBUS_TYPE_UINT32, &nodeid,
DBUS_TYPE_STRING, &ip,
DBUS_TYPE_STRING, &state,
DBUS_TYPE_INVALID)) {
syslog (LOG_ERR, "%s(%d) error\n", __func__, __LINE__);
goto out_unlock;
}
dbus_connection_send(db, msg, NULL);
ret = 0;
out_unlock:
if (ret == -1) {
syslog (LOG_ERR, "%s() error\n", __func__);
}
if (msg)
dbus_message_unref(msg);
out_free:
return;
}
static void
_cs_dbus_application_connection_event(char *nodename, uint32_t nodeid, char *app_name, const char *state)
{
DBusMessage *msg = NULL;
int ret = -1;
if (err_set) {
syslog (LOG_ERR, "%s\n", _err);
err_set = 0;
}
if (!db) {
goto out_free;
}
if (dbus_connection_get_is_connected(db) != TRUE) {
err_set = 1;
snprintf(_err, sizeof(_err), "DBus connection lost");
_cs_dbus_release();
goto out_unlock;
}
_cs_dbus_auto_flush();
if (!(msg = dbus_message_new_signal(DBUS_CS_PATH,
DBUS_CS_IFACE,
"ConnectionStateChange"))) {
syslog (LOG_ERR, "%s(%d) error\n", __func__, __LINE__);
goto out_unlock;
}
if (!dbus_message_append_args(msg,
DBUS_TYPE_STRING, &nodename,
DBUS_TYPE_UINT32, &nodeid,
DBUS_TYPE_STRING, &app_name,
DBUS_TYPE_STRING, &state,
DBUS_TYPE_INVALID)) {
syslog (LOG_ERR, "%s(%d) error\n", __func__, __LINE__);
goto out_unlock;
}
dbus_connection_send(db, msg, NULL);
ret = 0;
out_unlock:
if (msg)
dbus_message_unref(msg);
out_free:
return;
}
static void
_cs_dbus_init(void)
{
DBusConnection *dbc = NULL;
DBusError err;
dbus_error_init(&err);
dbc = dbus_bus_get(DBUS_BUS_SYSTEM, &err);
if (!dbc) {
snprintf(_err, sizeof(_err),
"dbus_bus_get: %s", err.message);
err_set = 1;
dbus_error_free(&err);
return;
}
dbus_connection_set_exit_on_disconnect(dbc, FALSE);
db = dbc;
notifiers[num_notifiers].node_membership_fn =
_cs_dbus_node_membership_event;
notifiers[num_notifiers].node_quorum_fn =
_cs_dbus_node_quorum_event;
notifiers[num_notifiers].application_connection_fn =
_cs_dbus_application_connection_event;
num_notifiers++;
}
#endif /* HAVE_DBUS */
#ifdef ENABLE_SNMP
static netsnmp_session *snmp_init (const char *target)
{
static netsnmp_session *session = NULL;
#ifndef NETSNMPV54
char default_port[128];
snprintf (default_port, sizeof (default_port), "%s:162", target);
#endif
if (session) {
return (session);
}
if (target == NULL) {
return NULL;
}
session = malloc (sizeof (netsnmp_session));
snmp_sess_init (session);
session->version = SNMP_VERSION_2c;
session->callback = NULL;
session->callback_magic = NULL;
session = snmp_add(session,
#ifdef NETSNMPV54
netsnmp_transport_open_client ("snmptrap", target),
#else
netsnmp_tdomain_transport (default_port, 0, "udp"),
#endif
NULL, NULL);
if (session == NULL) {
syslog(LOG_ERR, "Could not create snmp transport");
}
return (session);
}
static inline void add_field (
netsnmp_pdu *trap_pdu,
u_char asn_type,
const char *prefix,
void *value,
size_t value_size)
{
oid _oid[MAX_OID_LEN];
size_t _oid_len = MAX_OID_LEN;
if (snmp_parse_oid(prefix, _oid, &_oid_len)) {
snmp_pdu_add_variable (trap_pdu, _oid, _oid_len, asn_type, (u_char *) value, value_size);
}
}
static void
_cs_snmp_node_membership_event(char *nodename, uint32_t nodeid, char *state, char* ip)
{
int ret;
char csysuptime[CS_TIMESTAMP_STR_LEN];
static oid snmptrap_oid[] = { 1,3,6,1,6,3,1,1,4,1,0 };
static oid sysuptime_oid[] = { 1,3,6,1,2,1,1,3,0 };
time_t now = time (NULL);
netsnmp_pdu *trap_pdu;
netsnmp_session *session = snmp_init (snmp_manager);
if (session == NULL) {
syslog (LOG_NOTICE, "Failed to init SNMP session.\n");
return ;
}
trap_pdu = snmp_pdu_create (SNMP_MSG_TRAP2);
if (!trap_pdu) {
syslog (LOG_NOTICE, "Failed to create SNMP notification.\n");
return ;
}
/* send uptime */
snprintf (csysuptime, CS_TIMESTAMP_STR_LEN, "%ld", now);
snmp_add_var (trap_pdu, sysuptime_oid, sizeof (sysuptime_oid) / sizeof (oid), 't', csysuptime);
snmp_add_var (trap_pdu, snmptrap_oid, sizeof (snmptrap_oid) / sizeof (oid), 'o', SNMP_OID_TRAPS_NODE);
/* Add extries to the trap */
add_field (trap_pdu, ASN_OCTET_STR, SNMP_OID_OBJECT_NODE_NAME, (void*)nodename, strlen (nodename));
add_field (trap_pdu, ASN_INTEGER, SNMP_OID_OBJECT_NODE_ID, (void*)&nodeid, sizeof (nodeid));
add_field (trap_pdu, ASN_OCTET_STR, SNMP_OID_OBJECT_NODE_ADDR, (void*)ip, strlen (ip));
add_field (trap_pdu, ASN_OCTET_STR, SNMP_OID_OBJECT_NODE_STATUS, (void*)state, strlen (state));
/* Send and cleanup */
ret = snmp_send (session, trap_pdu);
if (ret == 0) {
/* error */
syslog (LOG_ERR, "Could not send SNMP trap");
snmp_free_pdu (trap_pdu);
}
}
static void
_cs_snmp_node_quorum_event(char *nodename, uint32_t nodeid,
const char *state)
{
int ret;
char csysuptime[20];
static oid snmptrap_oid[] = { 1,3,6,1,6,3,1,1,4,1,0 };
static oid sysuptime_oid[] = { 1,3,6,1,2,1,1,3,0 };
time_t now = time (NULL);
netsnmp_pdu *trap_pdu;
netsnmp_session *session = snmp_init (snmp_manager);
if (session == NULL) {
syslog (LOG_NOTICE, "Failed to init SNMP session.\n");
return ;
}
trap_pdu = snmp_pdu_create (SNMP_MSG_TRAP2);
if (!trap_pdu) {
syslog (LOG_NOTICE, "Failed to create SNMP notification.\n");
return ;
}
/* send uptime */
sprintf (csysuptime, "%ld", now);
snmp_add_var (trap_pdu, sysuptime_oid, sizeof (sysuptime_oid) / sizeof (oid), 't', csysuptime);
snmp_add_var (trap_pdu, snmptrap_oid, sizeof (snmptrap_oid) / sizeof (oid), 'o', SNMP_OID_TRAPS_NODE);
/* Add extries to the trap */
add_field (trap_pdu, ASN_OCTET_STR, SNMP_OID_OBJECT_NODE_NAME, (void*)nodename, strlen (nodename));
add_field (trap_pdu, ASN_INTEGER, SNMP_OID_OBJECT_NODE_ID, (void*)&nodeid, sizeof (nodeid));
add_field (trap_pdu, ASN_OCTET_STR, SNMP_OID_OBJECT_QUORUM, (void*)state, strlen (state));
/* Send and cleanup */
ret = snmp_send (session, trap_pdu);
if (ret == 0) {
/* error */
syslog (LOG_ERR, "Could not send SNMP trap");
snmp_free_pdu (trap_pdu);
}
}
static void
_cs_snmp_init(void)
{
if (snmp_manager == NULL) {
snmp_manager = (char*)local_host;
}
notifiers[num_notifiers].node_membership_fn =
_cs_snmp_node_membership_event;
notifiers[num_notifiers].node_quorum_fn =
_cs_snmp_node_quorum_event;
notifiers[num_notifiers].application_connection_fn = NULL;
num_notifiers++;
}
#endif /* ENABLE_SNMP */
static void
_cs_syslog_node_membership_event(char *nodename, uint32_t nodeid, char *state, char* ip)
{
syslog (LOG_NOTICE, "%s[%d] ip:%s %s\n", nodename, nodeid, ip, state);
}
static void
_cs_syslog_node_quorum_event(char *nodename, uint32_t nodeid, const char *state)
{
if (strcmp(state, "quorate") == 0) {
syslog (LOG_NOTICE, "%s[%d] is now %s\n", nodename, nodeid, state);
} else {
syslog (LOG_NOTICE, "%s[%d] has lost quorum\n", nodename, nodeid);
}
}
static void
_cs_syslog_application_connection_event(char *nodename, uint32_t nodeid, char* app_name, const char *state)
{
if (strcmp(state, "connected") == 0) {
syslog (LOG_ERR, "%s[%d] %s is now %s to corosync\n", nodename, nodeid, app_name, state);
} else {
syslog (LOG_ERR, "%s[%d] %s is now %s from corosync\n", nodename, nodeid, app_name, state);
}
}
static void
_cs_node_membership_event(char *nodename, uint32_t nodeid, char *state, char* ip)
{
int i;
for (i = 0; i < num_notifiers; i++) {
if (notifiers[i].node_membership_fn) {
notifiers[i].node_membership_fn(nodename, nodeid, state, ip);
}
}
}
static void
_cs_local_node_info_get(char **nodename, uint32_t *nodeid)
{
cs_error_t rc;
corosync_cfg_handle_t cfg_handle;
if (local_nodeid == 0) {
rc = corosync_cfg_initialize(&cfg_handle, NULL);
if (rc != CS_OK) {
syslog (LOG_ERR, "Failed to initialize the cfg API. Error %d\n", rc);
exit (EXIT_FAILURE);
}
rc = corosync_cfg_local_get (cfg_handle, &local_nodeid);
corosync_cfg_finalize(cfg_handle);
if (rc != CS_OK) {
local_nodeid = 0;
strncpy(local_nodename, "localhost", sizeof (local_nodename));
local_nodename[sizeof (local_nodename) - 1] = '\0';
} else {
gethostname(local_nodename, CS_MAX_NAME_LENGTH);
}
}
*nodeid = local_nodeid;
*nodename = local_nodename;
}
static void
_cs_node_quorum_event(const char *state)
{
int i;
char *nodename;
uint32_t nodeid;
_cs_local_node_info_get(&nodename, &nodeid);
for (i = 0; i < num_notifiers; i++) {
if (notifiers[i].node_quorum_fn) {
notifiers[i].node_quorum_fn(nodename, nodeid, state);
}
}
}
static void
_cs_application_connection_event(char *app_name, const char *state)
{
int i;
char *nodename;
uint32_t nodeid;
_cs_local_node_info_get(&nodename, &nodeid);
for (i = 0; i < num_notifiers; i++) {
if (notifiers[i].application_connection_fn) {
notifiers[i].application_connection_fn(nodename, nodeid, app_name, state);
}
}
}
static void
sig_exit_handler (int num)
{
poll_stop(poll_handle);
}
static void
_cs_confdb_init(void)
{
hdb_handle_t obj_handle;
cs_error_t rc;
int conf_fd = 0;
rc = confdb_initialize (&confdb_handle, &callbacks);
if (rc != CS_OK) {
syslog (LOG_ERR, "Failed to initialize the objdb API. Error %d\n", rc);
exit (EXIT_FAILURE);
}
confdb_fd_get(confdb_handle, &conf_fd);
poll_dispatch_add (poll_handle, conf_fd, POLLIN|POLLNVAL, NULL,
_cs_confdb_dispatch);
rc = _cs_confdb_find_object (confdb_handle, "runtime.connections.",
&obj_handle);
if (rc != CS_OK) {
syslog (LOG_ERR,
"Failed to find the connections object. Error %d\n", rc);
exit (EXIT_FAILURE);
}
rc = confdb_track_changes (confdb_handle, obj_handle,
CONFDB_TRACK_DEPTH_ONE);
if (rc != CS_OK) {
syslog (LOG_ERR,
"Failed to track the connections object. Error %d\n", rc);
exit (EXIT_FAILURE);
}
rc = _cs_confdb_find_object(confdb_handle,
"runtime.totem.pg.mrp.srp.members.", &obj_handle);
if (rc != CS_OK) {
syslog (LOG_ERR, "Failed to find the object. Error %d\n", rc);
exit (EXIT_FAILURE);
}
rc = confdb_track_changes(confdb_handle,
obj_handle, CONFDB_TRACK_DEPTH_RECURSIVE);
if (rc != CS_OK) {
syslog (LOG_ERR,
"Failed to track the object. Error %d\n", rc);
exit (EXIT_FAILURE);
}
}
static void
_cs_confdb_finalize(void)
{
confdb_stop_track_changes (confdb_handle);
confdb_finalize (confdb_handle);
}
static void
_cs_check_config(void)
{
if (conf[CS_NTF_LOG] == 0 &&
conf[CS_NTF_STDOUT] == 0 &&
conf[CS_NTF_SNMP] == 0 &&
conf[CS_NTF_DBUS] == 0) {
syslog(LOG_ERR, "no event type enabled, see corosync-notifyd -h, exiting.");
exit(EXIT_FAILURE);
}
#ifndef ENABLE_SNMP
if (conf[CS_NTF_SNMP]) {
syslog(LOG_ERR, "Not compiled with SNMP support enabled, exiting.");
exit(EXIT_FAILURE);
}
#endif
#ifndef HAVE_DBUS
if (conf[CS_NTF_DBUS]) {
syslog(LOG_ERR, "Not compiled with DBus support enabled, exiting.");
exit(EXIT_FAILURE);
}
#endif
if (conf[CS_NTF_STDOUT] && !conf[CS_NTF_FG]) {
syslog(LOG_ERR, "configured to print to stdout and run in the background, exiting");
exit(EXIT_FAILURE);
}
if (conf[CS_NTF_SNMP] && conf[CS_NTF_DBUS]) {
syslog(LOG_ERR, "configured to send snmp traps and dbus signals - are you sure?.");
}
}
static void
_cs_usage(void)
{
fprintf(stderr, "usage:\n"\
" -f : Start application in foreground.\n"\
" -l : Log all events.\n"\
" -o : Print events to stdout (turns on -l).\n"\
" -s : Send SNMP traps on all events.\n"\
" -m : SNMP Manager IP address (defaults to localhost).\n"\
" -d : Send DBUS signals on all events.\n"\
" -h : Print this help\n\n");
}
int
main(int argc, char *argv[])
{
int ch;
conf[CS_NTF_FG] = 0;
conf[CS_NTF_LOG] = 0;
conf[CS_NTF_STDOUT] = 0;
conf[CS_NTF_SNMP] = 0;
conf[CS_NTF_DBUS] = 0;
while ((ch = getopt (argc, argv, "floshdm:")) != EOF) {
switch (ch) {
case 'f':
conf[CS_NTF_FG] = 1;
break;
case 'l':
conf[CS_NTF_LOG] = 1;
break;
case 'm':
conf[CS_NTF_SNMP] = 1;
strncpy(snmp_manager_buf, optarg, sizeof (snmp_manager_buf));
snmp_manager_buf[sizeof (snmp_manager_buf) - 1] = '\0';
snmp_manager = snmp_manager_buf;
break;
case 'o':
conf[CS_NTF_LOG] = 1;
conf[CS_NTF_STDOUT] = 1;
break;
case 's':
conf[CS_NTF_SNMP] = 1;
break;
case 'd':
conf[CS_NTF_DBUS] = 1;
break;
case 'h':
default:
_cs_usage();
return EXIT_FAILURE;
}
}
if (conf[CS_NTF_STDOUT]) {
openlog(NULL, LOG_PID|LOG_PERROR, LOG_DAEMON);
} else {
openlog(NULL, LOG_PID, LOG_DAEMON);
}
_cs_check_config();
if (!conf[CS_NTF_FG]) {
if (daemon(0, 0) < 0)
{
perror("daemon() failed");
return EXIT_FAILURE;
}
}
num_notifiers = 0;
if (conf[CS_NTF_LOG]) {
notifiers[num_notifiers].node_membership_fn =
_cs_syslog_node_membership_event;
notifiers[num_notifiers].node_quorum_fn =
_cs_syslog_node_quorum_event;
notifiers[num_notifiers].application_connection_fn =
_cs_syslog_application_connection_event;
num_notifiers++;
}
poll_handle = poll_create();
_cs_confdb_init();
_cs_quorum_init();
#ifdef HAVE_DBUS
if (conf[CS_NTF_DBUS]) {
_cs_dbus_init();
}
#endif /* HAVE_DBUS */
#ifdef ENABLE_SNMP
if (conf[CS_NTF_SNMP]) {
_cs_snmp_init();
}
#endif /* ENABLE_SNMP */
(void)signal (SIGINT, sig_exit_handler);
(void)signal (SIGQUIT, sig_exit_handler);
(void)signal (SIGTERM, sig_exit_handler);
poll_run(poll_handle);
#ifdef HAVE_DBUS
if (conf[CS_NTF_DBUS]) {
_cs_dbus_release();
}
#endif /* HAVE_DBUS */
_cs_quorum_finalize();
_cs_confdb_finalize();
return 0;
}

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