solanum/ircd/authd.c

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/*
* authd.c: An interface to authd.
* (based somewhat on ircd-ratbox dns.c)
*
* Copyright (C) 2005 Aaron Sethman <androsyn@ratbox.org>
* Copyright (C) 2005-2012 ircd-ratbox development team
* Copyright (C) 2016 William Pitcock <nenolod@dereferenced.org>
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include <stdinc.h>
#include <rb_lib.h>
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#include <client.h>
#include <ircd_defs.h>
#include <parse.h>
#include <authd.h>
#include <match.h>
#include <logger.h>
#include <s_conf.h>
#include <client.h>
#include <send.h>
#include <numeric.h>
#include <msg.h>
#include <dns.h>
static int start_authd(void);
static void parse_authd_reply(rb_helper * helper);
static void restart_authd_cb(rb_helper * helper);
rb_helper *authd_helper;
static char *authd_path;
static int
start_authd(void)
{
char fullpath[PATH_MAX + 1];
#ifdef _WIN32
const char *suffix = ".exe";
#else
const char *suffix = "";
#endif
if(authd_path == NULL)
{
snprintf(fullpath, sizeof(fullpath), "%s/authd%s", PKGLIBEXECDIR, suffix);
if(access(fullpath, X_OK) == -1)
{
snprintf(fullpath, sizeof(fullpath), "%s/libexec/charybdis/authd%s",
ConfigFileEntry.dpath, suffix);
if(access(fullpath, X_OK) == -1)
{
ilog(L_MAIN,
"Unable to execute authd in %s or %s/libexec/charybdis",
PKGLIBEXECDIR, ConfigFileEntry.dpath);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Unable to execute authd in %s or %s/libexec/charybdis",
PKGLIBEXECDIR, ConfigFileEntry.dpath);
return 1;
}
}
authd_path = rb_strdup(fullpath);
}
authd_helper = rb_helper_start("authd", authd_path, parse_authd_reply, restart_authd_cb);
if(authd_helper == NULL)
{
ilog(L_MAIN, "Unable to start authd helper: %s", strerror(errno));
sendto_realops_snomask(SNO_GENERAL, L_ALL, "Unable to start authd helper: %s", strerror(errno));
return 1;
}
ilog(L_MAIN, "authd helper started");
sendto_realops_snomask(SNO_GENERAL, L_ALL, "authd helper started");
rb_helper_run(authd_helper);
return 0;
}
static void
parse_authd_reply(rb_helper * helper)
{
ssize_t len;
int parc;
char dnsBuf[READBUF_SIZE];
char *parv[MAXPARA + 1];
while((len = rb_helper_read(helper, dnsBuf, sizeof(dnsBuf))) > 0)
{
parc = rb_string_to_array(dnsBuf, parv, MAXPARA+1);
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switch (*parv[0])
{
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case 'E':
if(parc != 5)
{
ilog(L_MAIN, "authd sent a result with wrong number of arguments: got %d", parc);
restart_authd();
return;
}
dns_results_callback(parv[1], parv[2], parv[3], parv[4]);
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break;
case 'X':
case 'Y':
case 'Z':
if(parc < 3)
{
ilog(L_MAIN, "authd sent a result with wrong number of arguments: got %d", parc);
restart_authd();
return;
}
/* Select by type */
switch(*parv[2])
{
case 'D':
/* parv[0] conveys status */
if(parc < 4)
{
ilog(L_MAIN, "authd sent a result with wrong number of arguments: got %d", parc);
restart_authd();
return;
}
dns_stats_results_callback(parv[1], parv[0], parc - 3, (const char **)&parv[3]);
break;
default:
break;
}
break;
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default:
break;
}
}
}
void
init_authd(void)
{
if(start_authd())
{
ilog(L_MAIN, "Unable to start authd helper: %s", strerror(errno));
exit(0);
}
}
static void
restart_authd_cb(rb_helper * helper)
{
ilog(L_MAIN, "authd: restart_authd_cb called, authd died?");
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sendto_realops_snomask(SNO_GENERAL, L_ALL, "authd: restart_authd_cb called, authd died?");
if(helper != NULL)
{
rb_helper_close(helper);
authd_helper = NULL;
}
start_authd();
}
void
restart_authd(void)
{
restart_authd_cb(authd_helper);
}
void
rehash_authd(void)
{
rb_helper_write(authd_helper, "R");
}
void
check_authd(void)
{
if(authd_helper == NULL)
restart_authd();
}