/* Copyright 2010 Codership Oy <http://www.codership.com>
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; version 2 of the License.
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 Street, Fifth Floor, Boston, MA 02110-1335 USA */
#include "mariadb.h"
#include <ctype.h>
#include <mysqld.h>
#include "wsrep_priv.h"
#include "wsrep_utils.h"
#include "wsrep_status.h"
/* Allow only alnum and -_. */
static bool is_valid_node_name(
const char* s)
{
if (!s)
return true;
for (; *s; ++s)
{
unsigned char c= (
unsigned char) *s;
if (!isalnum(c) && c !=
'-' && c !=
'_' && c !=
'.')
return false;
}
return true;
}
/* Allow alnum and -_.:[]/ (host:port and [ipv6] forms). */
static bool is_valid_node_addr(
const char* s)
{
if (!s)
return true;
for (; *s; ++s)
{
unsigned char c= (
unsigned char) *s;
if (!isalnum(c) && c !=
'-' && c !=
'_' && c !=
'.' &&
c !=
':' && c !=
'[' && c !=
']' && c !=
'/')
return false;
}
return true;
}
void wsrep_notify_status(
enum wsrep::server_state::state status,
const wsrep::view* view)
{
Wsrep_status::report_state(status);
if (!view)
{
WSREP_DEBUG(
"wsrep_notify_status server not yet ready : wsrep_ready=%d status %d",
(
int) wsrep_ready_get(), (
int)status);
return;
}
if (!wsrep_notify_cmd ||
0 == strlen(wsrep_notify_cmd))
{
WSREP_INFO(
"wsrep_notify_cmd is not defined, skipping notification.");
return;
}
const long cmd_len = (
1 <<
16) -
1;
char* cmd_ptr = (
char*) my_malloc(PSI_NOT_INSTRUMENTED, cmd_len +
1, MYF(MY_WME));
long cmd_off =
0;
if (!cmd_ptr)
return;
// the warning is in the log
cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
"%s",
wsrep_notify_cmd);
cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
" --status %s",
to_c_string(status));
if (view != NULL)
{
std::ostringstream uuid;
uuid << view->state_id().id();
cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
" --uuid %s", uuid.str().c_str());
cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
" --primary %s", view->view_seqno().get() >=
0 ?
"yes" :
"no");
cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
" --index %zd", view->own_index());
const std::vector<wsrep::view::member>& members(view->members());
if (members.size())
{
cmd_off += snprintf (cmd_ptr + cmd_off, cmd_len - cmd_off,
" --members");
for (
unsigned int i=
0; i < members.size(); i++)
{
const char* name= members[i].name().c_str();
const char* incoming= members[i].incoming().c_str();
if (!is_valid_node_name(name) || !is_valid_node_addr(incoming))
{
WSREP_ERROR(
"Unsafe characters in cluster member %u "
"wsrep_node_name or wsrep_node_incoming_address, "
"aborting notification.", i);
my_free(cmd_ptr);
return;
}
std::ostringstream id;
id << members[i].id();
cmd_off += snprintf(cmd_ptr + cmd_off, cmd_len - cmd_off,
"%c%s/%s/%s", i >
0 ?
',' :
' ',
id.str().c_str(),
name, incoming);
}
}
}
if (cmd_off == cmd_len)
{
WSREP_ERROR(
"Notification buffer too short (%ld). Aborting notification.",
cmd_len);
my_free(cmd_ptr);
return;
}
wsp::process p(cmd_ptr,
"r", NULL);
p.wait();
int err= p.error();
if (err)
{
WSREP_ERROR(
"Notification command failed: %d (%s): \"%s\
"",
err, strerror(err), cmd_ptr);
}
my_free(cmd_ptr);
}