#include <freeradius-devel/ident.h>
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/modules.h>
#include <freeradius-devel/rad_assert.h>
#include <sys/stat.h>
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#ifdef HAVE_SYSLOG_H
# include <syslog.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
struct main_config_t mainconfig;
char *request_log_file = NULL;
char *debug_log_file = NULL;
char *debug_condition = NULL;
#ifndef __MINGW32__
uid_t server_uid;
static gid_t server_gid;
static const char *uid_name = NULL;
static const char *gid_name = NULL;
#endif
static const char *chroot_dir = NULL;
static int allow_core_dumps = 0;
static const char *radlog_dest = NULL;
static const char *localstatedir = NULL;
static const char *prefix = NULL;
static char *syslog_facility = NULL;
static const FR_NAME_NUMBER str2fac[] = {
#ifdef LOG_KERN
{ "kern", LOG_KERN },
#endif
#ifdef LOG_USER
{ "user", LOG_USER },
#endif
#ifdef LOG_MAIL
{ "mail", LOG_MAIL },
#endif
#ifdef LOG_DAEMON
{ "daemon", LOG_DAEMON },
#endif
#ifdef LOG_AUTH
{ "auth", LOG_AUTH },
#endif
#ifdef LOG_LPR
{ "lpr", LOG_LPR },
#endif
#ifdef LOG_NEWS
{ "news", LOG_NEWS },
#endif
#ifdef LOG_UUCP
{ "uucp", LOG_UUCP },
#endif
#ifdef LOG_CRON
{ "cron", LOG_CRON },
#endif
#ifdef LOG_AUTHPRIV
{ "authpriv", LOG_AUTHPRIV },
#endif
#ifdef LOG_FTP
{ "ftp", LOG_FTP },
#endif
#ifdef LOG_LOCAL0
{ "local0", LOG_LOCAL0 },
#endif
#ifdef LOG_LOCAL1
{ "local1", LOG_LOCAL1 },
#endif
#ifdef LOG_LOCAL2
{ "local2", LOG_LOCAL2 },
#endif
#ifdef LOG_LOCAL3
{ "local3", LOG_LOCAL3 },
#endif
#ifdef LOG_LOCAL4
{ "local4", LOG_LOCAL4 },
#endif
#ifdef LOG_LOCAL5
{ "local5", LOG_LOCAL5 },
#endif
#ifdef LOG_LOCAL6
{ "local6", LOG_LOCAL6 },
#endif
#ifdef LOG_LOCAL7
{ "local7", LOG_LOCAL7 },
#endif
{ NULL, -1 }
};
static const CONF_PARSER security_config[] = {
{ "max_attributes", PW_TYPE_INTEGER, 0, &fr_max_attributes, Stringify(0) },
{ "reject_delay", PW_TYPE_INTEGER, 0, &mainconfig.reject_delay, Stringify(0) },
{ "status_server", PW_TYPE_BOOLEAN, 0, &mainconfig.status_server, "no"},
{ NULL, -1, 0, NULL, NULL }
};
static const CONF_PARSER logdest_config[] = {
{ "destination", PW_TYPE_STRING_PTR, 0, &radlog_dest, "files" },
{ "syslog_facility", PW_TYPE_STRING_PTR, 0, &syslog_facility, Stringify(0) },
{ "file", PW_TYPE_STRING_PTR, -1, &mainconfig.log_file, "${logdir}/radius.log" },
{ "requests", PW_TYPE_STRING_PTR, -1, &request_log_file, NULL },
{ "debug_file", PW_TYPE_STRING_PTR, -1, &debug_log_file, NULL },
{ NULL, -1, 0, NULL, NULL }
};
static const CONF_PARSER serverdest_config[] = {
{ "log", PW_TYPE_SUBSECTION, 0, NULL, (const void *) logdest_config },
{ "log_file", PW_TYPE_STRING_PTR, -1, &mainconfig.log_file, NULL },
{ "log_destination", PW_TYPE_STRING_PTR, -1, &radlog_dest, NULL },
{ NULL, -1, 0, NULL, NULL }
};
static const CONF_PARSER log_config_nodest[] = {
{ "stripped_names", PW_TYPE_BOOLEAN, 0, &log_stripped_names,"no" },
{ "auth", PW_TYPE_BOOLEAN, -1, &mainconfig.log_auth, "no" },
{ "auth_badpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_badpass, "no" },
{ "auth_goodpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_goodpass, "no" },
{ NULL, -1, 0, NULL, NULL }
};
static const CONF_PARSER server_config[] = {
{ "prefix", PW_TYPE_STRING_PTR, 0, &prefix, "/usr/local"},
{ "localstatedir", PW_TYPE_STRING_PTR, 0, &localstatedir, "${prefix}/var"},
{ "logdir", PW_TYPE_STRING_PTR, 0, &radlog_dir, "${localstatedir}/log"},
{ "libdir", PW_TYPE_STRING_PTR, 0, &radlib_dir, "${prefix}/lib"},
{ "radacctdir", PW_TYPE_STRING_PTR, 0, &radacct_dir, "${logdir}/radacct" },
{ "hostname_lookups", PW_TYPE_BOOLEAN, 0, &fr_dns_lookups, "no" },
{ "max_request_time", PW_TYPE_INTEGER, 0, &mainconfig.max_request_time, Stringify(MAX_REQUEST_TIME) },
{ "cleanup_delay", PW_TYPE_INTEGER, 0, &mainconfig.cleanup_delay, Stringify(CLEANUP_DELAY) },
{ "max_requests", PW_TYPE_INTEGER, 0, &mainconfig.max_requests, Stringify(MAX_REQUESTS) },
#ifdef DELETE_BLOCKED_REQUESTS
{ "delete_blocked_requests", PW_TYPE_INTEGER, 0, &mainconfig.kill_unresponsive_children, Stringify(FALSE) },
#endif
{ "allow_core_dumps", PW_TYPE_BOOLEAN, 0, &allow_core_dumps, "no" },
{ "pidfile", PW_TYPE_STRING_PTR, 0, &mainconfig.pid_file, "${run_dir}/radiusd.pid"},
{ "checkrad", PW_TYPE_STRING_PTR, 0, &mainconfig.checkrad, "${sbindir}/checkrad" },
{ "debug_level", PW_TYPE_INTEGER, 0, &mainconfig.debug_level, "0"},
#ifdef WITH_PROXY
{ "proxy_requests", PW_TYPE_BOOLEAN, 0, &mainconfig.proxy_requests, "yes" },
#endif
{ "log", PW_TYPE_SUBSECTION, 0, NULL, (const void *) log_config_nodest },
{ "log_auth", PW_TYPE_BOOLEAN, -1, &mainconfig.log_auth, NULL },
{ "log_auth_badpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_badpass, NULL },
{ "log_auth_goodpass", PW_TYPE_BOOLEAN, 0, &mainconfig.log_auth_goodpass, NULL },
{ "log_stripped_names", PW_TYPE_BOOLEAN, 0, &log_stripped_names, NULL },
{ "security", PW_TYPE_SUBSECTION, 0, NULL, (const void *) security_config },
{ NULL, -1, 0, NULL, NULL }
};
#define MAX_ARGV (256)
static size_t config_escape_func(char *out, size_t outlen, const char *in)
{
size_t len = 0;
static const char *disallowed = "%{}\\'\"`";
while (in[0]) {
if ((in[0] < 32)) {
if (outlen <= 3) break;
snprintf(out, outlen, "=%02X", (unsigned char) in[0]);
in++;
out += 3;
outlen -= 3;
len += 3;
continue;
} else if (strchr(disallowed, *in) != NULL) {
if (outlen <= 2) break;
out[0] = '\\';
out[1] = *in;
in++;
out += 2;
outlen -= 2;
len += 2;
continue;
}
if (outlen <= 1) {
break;
}
*out = *in;
out++;
in++;
outlen--;
len++;
}
*out = '\0';
return len;
}
static size_t xlat_config(void *instance, REQUEST *request,
char *fmt, char *out,
size_t outlen,
RADIUS_ESCAPE_STRING func)
{
const char *value;
CONF_PAIR *cp;
CONF_ITEM *ci;
char buffer[1024];
request = request;
instance = instance;
if (!radius_xlat(buffer, sizeof(buffer), fmt, request, config_escape_func)) {
return 0;
}
ci = cf_reference_item(request->root->config,
request->root->config, buffer);
if (!ci || !cf_item_is_pair(ci)) {
*out = '\0';
return 0;
}
cp = cf_itemtopair(ci);
value = cf_pair_value(cp);
if (value) {
if (outlen > strlen(value)) {
outlen = strlen(value) + 1;
}
}
return func(out, outlen, value);
}
static size_t xlat_client(UNUSED void *instance, REQUEST *request,
char *fmt, char *out,
size_t outlen,
UNUSED RADIUS_ESCAPE_STRING func)
{
const char *value = NULL;
CONF_PAIR *cp;
if (!fmt || !out || (outlen < 1)) return 0;
if (!request || !request->client) {
*out = '\0';
return 0;
}
cp = cf_pair_find(request->client->cs, fmt);
if (!cp || !(value = cf_pair_value(cp))) {
*out = '\0';
return 0;
}
strlcpy(out, value, outlen);
return strlen(out);
}
static int r_mkdir(const char *part)
{
char *ptr, parentdir[500];
struct stat st;
if (stat(part, &st) == 0)
return(0);
ptr = strrchr(part, FR_DIR_SEP);
if (ptr == part)
return(0);
snprintf(parentdir, (ptr - part)+1, "%s", part);
if (r_mkdir(parentdir) != 0)
return(1);
if (mkdir(part, 0770) != 0) {
radlog(L_ERR, "mkdir(%s) error: %s\n", part, strerror(errno));
return(1);
}
return(0);
}
#ifndef __MINGW32__
int did_setuid = FALSE;
static int switch_users(CONF_SECTION *cs)
{
CONF_PAIR *cp;
#ifdef HAVE_SYS_RESOURCE_H
struct rlimit core_limits;
#endif
if (debug_flag && (getuid() != 0)) return 1;
#ifdef HAVE_GRP_H
cp = cf_pair_find(cs, "group");
if (cp) gid_name = cf_pair_value(cp);
if (gid_name) {
struct group *gr;
DEBUG2("group = %s", gid_name);
gr = getgrnam(gid_name);
if (gr == NULL) {
fprintf(stderr, "%s: Cannot get ID for group %s: %s\n",
progname, gid_name, strerror(errno));
return 0;
}
server_gid = gr->gr_gid;
} else {
server_gid = getgid();
}
#endif
#ifdef HAVE_PWD_H
cp = cf_pair_find(cs, "user");
if (cp) uid_name = cf_pair_value(cp);
if (uid_name) {
struct passwd *pw;
DEBUG2("user = %s", uid_name);
pw = getpwnam(uid_name);
if (pw == NULL) {
fprintf(stderr, "%s: Cannot get passwd entry for user %s: %s\n",
progname, uid_name, strerror(errno));
return 0;
}
server_uid = pw->pw_uid;
#ifdef HAVE_INITGROUPS
if (initgroups(uid_name, server_gid) < 0) {
fprintf(stderr, "%s: Cannot initialize supplementary group list for user %s: %s\n",
progname, uid_name, strerror(errno));
return 0;
}
#endif
} else {
server_uid = getuid();
}
#endif
cp = cf_pair_find(cs, "chroot");
if (cp) chroot_dir = cf_pair_value(cp);
if (chroot_dir) {
DEBUG2("chroot = %s", chroot_dir);
if (chroot(chroot_dir) < 0) {
fprintf(stderr, "%s: Failed to perform chroot %s: %s",
progname, chroot_dir, strerror(errno));
return 0;
}
radlog(L_INFO, "performing chroot to %s\n", chroot_dir);
}
#ifdef HAVE_GRP_H
if (gid_name && (setgid(server_gid) < 0)) {
fprintf(stderr, "%s: Failed setting group to %s: %s",
progname, gid_name, strerror(errno));
return 0;
}
#endif
#ifdef HAVE_PWD_H
if (uid_name) {
#ifndef HAVE_SETRESUID
#define setresuid(_a, _b, _c) setuid(_b)
#endif
if (setresuid(-1, server_uid, geteuid()) < 0) {
fprintf(stderr, "%s: Failed switching uid: %s\n",
progname, strerror(errno));
return 0;
}
if (geteuid() != server_uid) {
fprintf(stderr, "%s: Failed switching uid: UID is incorrect\n",
progname);
return 0;
}
}
did_setuid = TRUE;
#endif
if ((mainconfig.radlog_dest == RADLOG_FILES) &&
(mainconfig.log_file != NULL)) {
int fd = open(mainconfig.log_file,
O_WRONLY | O_APPEND | O_CREAT, 0640);
if (fd < 0) {
fprintf(stderr, "%s: Cannot write to log file %s: %s\n",
progname, mainconfig.log_file, strerror(errno));
return 0;
}
close(fd);
}
#ifdef HAVE_SYS_RESOURCE_H
if (getrlimit(RLIMIT_CORE, &core_limits) < 0) {
radlog(L_ERR, "Failed to get current core limit: %s", strerror(errno));
return 0;
}
#endif
if (!(debug_flag || allow_core_dumps || did_setuid)) {
#ifdef HAVE_SYS_RESOURCE_H
struct rlimit no_core;
no_core.rlim_cur = 0;
no_core.rlim_max = 0;
if (setrlimit(RLIMIT_CORE, &no_core) < 0) {
radlog(L_ERR, "Failed disabling core dumps: %s",
strerror(errno));
return 0;
}
#endif
} else if ((debug_flag == 0) && allow_core_dumps && did_setuid) {
#ifdef HAVE_SYS_PRCTL_H
#ifdef PR_SET_DUMPABLE
if (prctl(PR_SET_DUMPABLE, 1) < 0) {
radlog(L_ERR,"Cannot enable core dumps: prctl(PR_SET_DUMPABLE) failed: '%s'",
strerror(errno));
}
#endif
#endif
#ifdef HAVE_SYS_RESOURCE_H
if (setrlimit(RLIMIT_CORE, &core_limits) < 0) {
radlog(L_ERR, "Cannot update core dump limit: %s",
strerror(errno));
return 0;
}
#endif
radlog(L_INFO, "Core dumps are enabled.");
}
return 1;
}
#endif
static const FR_NAME_NUMBER str2dest[] = {
{ "null", RADLOG_NULL },
{ "files", RADLOG_FILES },
{ "syslog", RADLOG_SYSLOG },
{ "stdout", RADLOG_STDOUT },
{ "stderr", RADLOG_STDERR },
{ NULL, RADLOG_NUM_DEST }
};
int read_mainconfig(int reload)
{
const char *p = NULL;
static int old_debug_level = -1;
CONF_PAIR *cp;
CONF_SECTION *cs;
struct stat statbuf;
char buffer[1024];
if (stat(radius_dir, &statbuf) < 0) {
radlog(L_ERR, "Errors reading %s: %s",
radius_dir, strerror(errno));
return -1;
}
#ifdef S_IWOTH
if ((statbuf.st_mode & S_IWOTH) != 0) {
radlog(L_ERR, "Configuration directory %s is globally writable. Refusing to start due to insecure configuration.",
radius_dir);
return -1;
}
#endif
#ifdef S_IROTH
if (0 && (statbuf.st_mode & S_IROTH) != 0) {
radlog(L_ERR, "Configuration directory %s is globally readable. Refusing to start due to insecure configuration.",
radius_dir);
return -1;
}
#endif
if (!reload) {
radlog(L_INFO, "Starting - reading configuration files ...");
} else {
radlog(L_INFO, "Reloading - reading configuration files...");
}
snprintf(buffer, sizeof(buffer), "%.200s/%.50s.conf",
radius_dir, mainconfig.name);
if ((cs = cf_file_read(buffer)) == NULL) {
radlog(L_ERR, "Errors reading %s", buffer);
return -1;
}
if (mainconfig.radlog_dest == RADLOG_NULL) {
if (cf_section_parse(cs, NULL, serverdest_config) < 0) {
fprintf(stderr, "radiusd: Error: Failed to parse log{} section.\n");
cf_section_free(&cs);
return -1;
}
if (!radlog_dest) {
fprintf(stderr, "radiusd: Error: No log destination specified.\n");
cf_section_free(&cs);
return -1;
}
mainconfig.radlog_dest = fr_str2int(str2dest, radlog_dest,
RADLOG_NUM_DEST);
if (mainconfig.radlog_dest == RADLOG_NUM_DEST) {
fprintf(stderr, "radiusd: Error: Unknown log_destination %s\n",
radlog_dest);
cf_section_free(&cs);
return -1;
}
if (mainconfig.radlog_dest == RADLOG_SYSLOG) {
if (!syslog_facility) {
fprintf(stderr, "radiusd: Error: Syslog chosen but no facility was specified\n");
cf_section_free(&cs);
return -1;
}
mainconfig.syslog_facility = fr_str2int(str2fac, syslog_facility, -1);
if (mainconfig.syslog_facility < 0) {
fprintf(stderr, "radiusd: Error: Unknown syslog_facility %s\n",
syslog_facility);
cf_section_free(&cs);
return -1;
}
}
}
#ifndef __MINGW32__
if (!switch_users(cs)) exit(1);
#endif
cp = cf_pair_find(cs, "dictionary");
if (cp) p = cf_pair_value(cp);
if (!p) p = radius_dir;
DEBUG2("including dictionary file %s/%s", p, RADIUS_DICTIONARY);
if (dict_init(p, RADIUS_DICTIONARY) != 0) {
radlog(L_ERR, "Errors reading dictionary: %s",
fr_strerror());
return -1;
}
cf_section_parse(cs, NULL, server_config);
cf_section_free(&mainconfig.config);
mainconfig.config = cs;
if (!clients_parse_section(cs)) {
return -1;
}
DEBUG2("%s: #### Loading Realms and Home Servers ####", mainconfig.name);
if (!realms_init(cs)) {
return -1;
}
xlat_register("config", xlat_config, NULL);
xlat_register("client", xlat_client, NULL);
if (reload) {
if (mainconfig.debug_level != old_debug_level) {
debug_flag = mainconfig.debug_level;
}
} else if (debug_flag == 0) {
debug_flag = mainconfig.debug_level;
}
fr_debug_flag = debug_flag;
old_debug_level = mainconfig.debug_level;
if (mainconfig.reject_delay > mainconfig.cleanup_delay) {
mainconfig.reject_delay = mainconfig.cleanup_delay;
}
if (mainconfig.reject_delay < 0) mainconfig.reject_delay = 0;
if (setup_modules(reload, mainconfig.config) < 0) {
radlog(L_ERR, "Errors initializing modules");
return -1;
}
if (chroot_dir) {
if (chdir(radlog_dir) < 0) {
radlog(L_ERR, "Failed to 'chdir %s' after chroot: %s",
radlog_dir, strerror(errno));
return -1;
}
}
return 0;
}
int free_mainconfig(void)
{
cf_section_free(&mainconfig.config);
realms_free();
listen_free(&mainconfig.listen);
dict_free();
return 0;
}