diff options
Diffstat (limited to 'src/main/mainconfig.c')
| -rw-r--r-- | src/main/mainconfig.c | 1420 |
1 files changed, 1420 insertions, 0 deletions
diff --git a/src/main/mainconfig.c b/src/main/mainconfig.c new file mode 100644 index 0000000..227ae4a --- /dev/null +++ b/src/main/mainconfig.c @@ -0,0 +1,1420 @@ +/* + * mainconf.c Handle the server's configuration. + * + * Version: $Id$ + * + * 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 St, Fifth Floor, Boston, MA 02110-1301, USA + * + * Copyright 2002,2006-2007 The FreeRADIUS server project + * Copyright 2002 Alan DeKok <aland@ox.org> + */ + +RCSID("$Id$") + +#include <freeradius-devel/radiusd.h> +#include <freeradius-devel/modules.h> +#include <freeradius-devel/modpriv.h> +#include <freeradius-devel/rad_assert.h> + +#include <sys/stat.h> +#include <pwd.h> +#include <grp.h> + +#ifdef HAVE_SYSLOG_H +# include <syslog.h> +#endif + +#ifdef HAVE_FCNTL_H +# include <fcntl.h> +#endif + +#ifdef HAVE_SYSTEMD +# include <systemd/sd-daemon.h> +#endif + +main_config_t main_config; //!< Main server configuration. +extern fr_cond_t *debug_condition; +fr_cond_t *debug_condition = NULL; //!< Condition used to mark packets up for checking. +bool event_loop_started = false; //!< Whether the main event loop has been started yet. + +typedef struct cached_config_t { + struct cached_config_t *next; + time_t created; + CONF_SECTION *cs; +} cached_config_t; + +static cached_config_t *cs_cache = NULL; + +/* + * Temporary local variables for parsing the configuration + * file. + */ +#ifdef HAVE_SETUID +/* + * Systems that have set/getresuid also have setuid. + */ +static uid_t server_uid = 0; +static gid_t server_gid = 0; +static char const *uid_name = NULL; +static char const *gid_name = NULL; +#endif +static char const *chroot_dir = NULL; +static bool allow_core_dumps = false; +static char const *radlog_dest = NULL; + +/* + * These are not used anywhere else.. + */ +static char const *localstatedir = NULL; +static char const *prefix = NULL; +static char const *my_name = NULL; +static char const *sbindir = NULL; +static char const *run_dir = NULL; +static char const *syslog_facility = NULL; +static bool do_colourise = false; + +static char const *radius_dir = NULL; //!< Path to raddb directory + +/********************************************************************** + * + * We need to figure out where the logs go, before doing anything + * else. This is so that the log messages go to the correct + * place. + * + * BUT, we want the settings from the command line to over-ride + * the ones in the configuration file. So, these items are + * parsed ONLY if there is no "-l foo" on the command line. + * + **********************************************************************/ + +/* + * Log destinations + */ +static const CONF_PARSER startup_log_config[] = { + { "destination", FR_CONF_POINTER(PW_TYPE_STRING, &radlog_dest), "files" }, + { "syslog_facility", FR_CONF_POINTER(PW_TYPE_STRING, &syslog_facility), STRINGIFY(0) }, + + { "localstatedir", FR_CONF_POINTER(PW_TYPE_STRING, &localstatedir), "${prefix}/var"}, + { "logdir", FR_CONF_POINTER(PW_TYPE_STRING, &radlog_dir), "${localstatedir}/log"}, + { "file", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.log_file), "${logdir}/radius.log" }, + { "requests", FR_CONF_POINTER(PW_TYPE_STRING | PW_TYPE_DEPRECATED, &default_log.file), NULL }, + CONF_PARSER_TERMINATOR +}; + + +/* + * Basic configuration for the server. + */ +static const CONF_PARSER startup_server_config[] = { + { "log", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) startup_log_config }, + + { "name", FR_CONF_POINTER(PW_TYPE_STRING, &my_name), "radiusd"}, + { "prefix", FR_CONF_POINTER(PW_TYPE_STRING, &prefix), "/usr/local"}, + + { "log_file", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.log_file), NULL }, + { "log_destination", FR_CONF_POINTER(PW_TYPE_STRING, &radlog_dest), NULL }, + { "use_utc", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &log_dates_utc), NULL }, + CONF_PARSER_TERMINATOR +}; + + +/********************************************************************** + * + * Now that we've parsed the log destination, AND the security + * items, we can parse the rest of the configuration items. + * + **********************************************************************/ +static const CONF_PARSER log_config[] = { + { "stripped_names", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &log_stripped_names),"no" }, + { "auth", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.log_auth), "no" }, + { "auth_accept", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.log_accept), NULL}, + { "auth_reject", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.log_reject), NULL}, + { "auth_badpass", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.log_auth_badpass), "no" }, + { "auth_goodpass", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.log_auth_goodpass), "no" }, + { "msg_badpass", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.auth_badpass_msg), NULL}, + { "msg_goodpass", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.auth_goodpass_msg), NULL}, + { "colourise",FR_CONF_POINTER(PW_TYPE_BOOLEAN, &do_colourise), NULL }, + { "use_utc", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &log_dates_utc), NULL }, + { "msg_denied", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.denied_msg), "You are already logged in - access denied" }, + { "suppress_secrets", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.suppress_secrets), NULL }, + CONF_PARSER_TERMINATOR +}; + + +/* + * Security configuration for the server. + */ +static const CONF_PARSER security_config[] = { + { "max_attributes", FR_CONF_POINTER(PW_TYPE_INTEGER, &fr_max_attributes), STRINGIFY(0) }, + { "reject_delay", FR_CONF_POINTER(PW_TYPE_TIMEVAL, &main_config.reject_delay), STRINGIFY(0) }, + { "status_server", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.status_server), "no"}, +#ifdef ENABLE_OPENSSL_VERSION_CHECK + { "allow_vulnerable_openssl", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.allow_vulnerable_openssl), "no"}, +#endif + CONF_PARSER_TERMINATOR +}; + +static const CONF_PARSER resources[] = { + /* + * Don't set a default here. It's set in the code, below. This means that + * the config item will *not* get printed out in debug mode, so that no one knows + * it exists. + */ + { "talloc_pool_size", FR_CONF_POINTER(PW_TYPE_INTEGER, &main_config.talloc_pool_size), NULL }, + CONF_PARSER_TERMINATOR +}; + +static const CONF_PARSER server_config[] = { + /* + * FIXME: 'prefix' is the ONLY one which should be + * configured at compile time. Hard-coding it here is + * bad. It will be cleaned up once we clean up the + * hard-coded defines for the locations of the various + * files. + */ + { "name", FR_CONF_POINTER(PW_TYPE_STRING, &my_name), "radiusd"}, + { "prefix", FR_CONF_POINTER(PW_TYPE_STRING, &prefix), "/usr/local"}, + { "localstatedir", FR_CONF_POINTER(PW_TYPE_STRING, &localstatedir), "${prefix}/var"}, + { "sbindir", FR_CONF_POINTER(PW_TYPE_STRING, &sbindir), "${prefix}/sbin"}, + { "logdir", FR_CONF_POINTER(PW_TYPE_STRING, &radlog_dir), "${localstatedir}/log"}, + { "run_dir", FR_CONF_POINTER(PW_TYPE_STRING, &run_dir), "${localstatedir}/run/${name}"}, + { "libdir", FR_CONF_POINTER(PW_TYPE_STRING, &radlib_dir), "${prefix}/lib"}, + { "radacctdir", FR_CONF_POINTER(PW_TYPE_STRING, &radacct_dir), "${logdir}/radacct" }, + { "panic_action", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.panic_action), NULL}, + { "hostname_lookups", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &fr_dns_lookups), "no" }, + { "max_request_time", FR_CONF_POINTER(PW_TYPE_INTEGER, &main_config.max_request_time), STRINGIFY(MAX_REQUEST_TIME) }, + { "cleanup_delay", FR_CONF_POINTER(PW_TYPE_INTEGER, &main_config.cleanup_delay), STRINGIFY(CLEANUP_DELAY) }, + { "max_requests", FR_CONF_POINTER(PW_TYPE_INTEGER, &main_config.max_requests), STRINGIFY(MAX_REQUESTS) }, + { "postauth_client_lost", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.postauth_client_lost), "no" }, + { "pidfile", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.pid_file), "${run_dir}/radiusd.pid"}, + { "checkrad", FR_CONF_POINTER(PW_TYPE_STRING, &main_config.checkrad), "${sbindir}/checkrad" }, + + { "debug_level", FR_CONF_POINTER(PW_TYPE_INTEGER, &main_config.debug_level), "0"}, + +#ifdef WITH_PROXY + { "proxy_requests", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &main_config.proxy_requests), "yes" }, +#endif + { "log", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) log_config }, + + { "resources", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) resources }, + + /* + * People with old configs will have these. They are listed + * AFTER the "log" section, so if they exist in radiusd.conf, + * it will prefer "log_foo = bar" to "log { foo = bar }". + * They're listed with default values of NULL, so that if they + * DON'T exist in radiusd.conf, then the previously parsed + * values for "log { foo = bar}" will be used. + */ + { "log_auth", FR_CONF_POINTER(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, &main_config.log_auth), NULL }, + { "log_auth_badpass", FR_CONF_POINTER(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, &main_config.log_auth_badpass), NULL }, + { "log_auth_goodpass", FR_CONF_POINTER(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, &main_config.log_auth_goodpass), NULL }, + { "log_stripped_names", FR_CONF_POINTER(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, &log_stripped_names), NULL }, + + { "security", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) security_config }, + CONF_PARSER_TERMINATOR +}; + + +/********************************************************************** + * + * The next few items are here as a "bootstrap" for security. + * They allow the server to switch users, chroot, while still + * opening the various output files with the correct permission. + * + * It's rare (or impossible) to have parse errors here, so we + * don't worry too much about that. In contrast, when we parse + * the rest of the configuration, we CAN get parse errors. We + * want THOSE parse errors to go to the log file, and we want the + * log file to have the correct permissions. + * + **********************************************************************/ +static const CONF_PARSER bootstrap_security_config[] = { +#ifdef HAVE_SETUID + { "user", FR_CONF_POINTER(PW_TYPE_STRING, &uid_name), NULL }, + { "group", FR_CONF_POINTER(PW_TYPE_STRING, &gid_name), NULL }, +#endif + { "chroot", FR_CONF_POINTER(PW_TYPE_STRING, &chroot_dir), NULL }, + { "allow_core_dumps", FR_CONF_POINTER(PW_TYPE_BOOLEAN, &allow_core_dumps), "no" }, + CONF_PARSER_TERMINATOR +}; + +static const CONF_PARSER bootstrap_config[] = { + { "security", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) bootstrap_security_config }, + + { "name", FR_CONF_POINTER(PW_TYPE_STRING, &my_name), "radiusd"}, + { "prefix", FR_CONF_POINTER(PW_TYPE_STRING, &prefix), "/usr/local"}, + { "localstatedir", FR_CONF_POINTER(PW_TYPE_STRING, &localstatedir), "${prefix}/var"}, + + { "logdir", FR_CONF_POINTER(PW_TYPE_STRING, &radlog_dir), "${localstatedir}/log"}, + { "run_dir", FR_CONF_POINTER(PW_TYPE_STRING, &run_dir), "${localstatedir}/run/${name}"}, + + /* + * For backwards compatibility. + */ +#ifdef HAVE_SETUID + { "user", FR_CONF_POINTER(PW_TYPE_STRING | PW_TYPE_DEPRECATED, &uid_name), NULL }, + { "group", FR_CONF_POINTER(PW_TYPE_STRING | PW_TYPE_DEPRECATED, &gid_name), NULL }, +#endif + { "chroot", FR_CONF_POINTER(PW_TYPE_STRING | PW_TYPE_DEPRECATED, &chroot_dir), NULL }, + { "allow_core_dumps", FR_CONF_POINTER(PW_TYPE_BOOLEAN | PW_TYPE_DEPRECATED, &allow_core_dumps), NULL }, + CONF_PARSER_TERMINATOR +}; + + +static size_t config_escape_func(UNUSED REQUEST *request, char *out, size_t outlen, char const *in, UNUSED void *arg) +{ + size_t len = 0; + static char const disallowed[] = "%{}\\'\"`"; + + while (in[0]) { + /* + * Non-printable characters get replaced with their + * mime-encoded equivalents. + */ + 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; + } + + /* + * Only one byte left. + */ + if (outlen <= 1) { + break; + } + + /* + * Allowed character. + */ + *out = *in; + out++; + in++; + outlen--; + len++; + } + *out = '\0'; + return len; +} + +/* + * Xlat for %{config:section.subsection.attribute} + */ +static ssize_t xlat_config(UNUSED void *instance, REQUEST *request, char const *fmt, char *out, size_t outlen) +{ + char const *value; + CONF_PAIR *cp; + CONF_ITEM *ci; + char buffer[1024]; + + /* + * Expand it safely. + */ + if (radius_xlat(buffer, sizeof(buffer), request, fmt, config_escape_func, NULL) < 0) { + return 0; + } + + ci = cf_reference_item(request->root->config, + request->root->config, buffer); + if (!ci || !cf_item_is_pair(ci)) { + REDEBUG("Config item \"%s\" does not exist", fmt); + *out = '\0'; + return -1; + } + + cp = cf_item_to_pair(ci); + + /* + * Ensure that we only copy what's necessary. + * + * If 'outlen' is too small, then the output is chopped to fit. + */ + value = cf_pair_value(cp); + if (!value) { + out[0] = '\0'; + return 0; + } + + if (outlen > strlen(value)) { + outlen = strlen(value) + 1; + } + + strlcpy(out, value, outlen); + + return strlen(out); +} + + +/* + * Xlat for %{client:foo} + */ +static ssize_t xlat_client(UNUSED void *instance, REQUEST *request, char const *fmt, char *out, size_t outlen) +{ + char const *value = NULL; + CONF_PAIR *cp; + + if (!fmt || !out || (outlen < 1)) return 0; + + if (!request->client) { + RWDEBUG("No client associated with this request"); + *out = '\0'; + return 0; + } + + cp = cf_pair_find(request->client->cs, fmt); + if (!cp || !(value = cf_pair_value(cp))) { + if (strcmp(fmt, "shortname") == 0 && request->client->shortname) { + value = request->client->shortname; + } + else if (strcmp(fmt, "nas_type") == 0 && request->client->nas_type) { + value = request->client->nas_type; + } else { + *out = '\0'; + return 0; + } + } + + strlcpy(out, value, outlen); + + return strlen(out); +} + +/* + * Xlat for %{getclient:<ipaddr>.foo} + */ +static ssize_t xlat_getclient(UNUSED void *instance, REQUEST *request, char const *fmt, char *out, size_t outlen) +{ + char const *value = NULL; + char buffer[INET6_ADDRSTRLEN], *q; + char const *p = fmt; + fr_ipaddr_t ip; + CONF_PAIR *cp; + RADCLIENT *client = NULL; + + if (!fmt || !out || (outlen < 1)) return 0; + + q = strrchr(p, '.'); + if (!q || (q == p) || (((size_t)(q - p)) > sizeof(buffer))) { + REDEBUG("Invalid client string"); + goto error; + } + + strlcpy(buffer, p, (q + 1) - p); + if (fr_pton(&ip, buffer, -1, AF_UNSPEC, false) < 0) { + REDEBUG("\"%s\" is not a valid IPv4 or IPv6 address", buffer); + goto error; + } + + fmt = q + 1; + + client = client_find(NULL, &ip, IPPROTO_IP); + if (!client) { + RDEBUG("No client found with IP \"%s\"", buffer); + *out = '\0'; + return 0; + } + + cp = cf_pair_find(client->cs, fmt); + if (!cp || !(value = cf_pair_value(cp))) { + if (strcmp(fmt, "shortname") == 0) { + strlcpy(out, request->client->shortname, outlen); + return strlen(out); + } + *out = '\0'; + return 0; + } + + strlcpy(out, value, outlen); + return strlen(out); + + error: + *out = '\0'; + return -1; +} + +/* + * Common xlat for listeners + */ +static ssize_t xlat_listen_common(REQUEST *request, rad_listen_t *listen, + char const *fmt, char *out, size_t outlen) +{ + char const *value = NULL; + CONF_PAIR *cp; + + if (!fmt || !out || (outlen < 1)) return 0; + + if (!listen) { + RWDEBUG("No listener associated with this request"); + *out = '\0'; + return 0; + } + + /* + * When TLS is configured, we *require* the use of TLS. + */ + if (strcmp(fmt, "tls") == 0) { +#ifdef WITH_TLS + if (listen->tls) { + strlcpy(out, "yes", outlen); + return strlen(out); + } +#endif + + strlcpy(out, "no", outlen); + return strlen(out); + } + +#ifdef WITH_TLS + /* + * Look for TLS certificate data. + */ + if (strncmp(fmt, "TLS-", 4) == 0) { + VALUE_PAIR *vp; + listen_socket_t *sock = listen->data; + + if (!listen->tls) { + RDEBUG("Listener is not using TLS. TLS attributes are not available"); + *out = '\0'; + return 0; + } + + for (vp = sock->certs; vp != NULL; vp = vp->next) { + if (strcmp(fmt, vp->da->name) == 0) { + return vp_prints_value(out, outlen, vp, 0); + } + } + + RDEBUG("Unknown TLS attribute \"%s\"", fmt); + *out = '\0'; + return 0; + } +#else + if (strncmp(fmt, "TLS-", 4) == 0) { + RDEBUG("Server is not built with TLS support"); + *out = '\0'; + return 0; + } +#endif + +#ifdef WITH_COA_TUNNEL + /* + * Look for RADSEC CoA tunnel key. + */ + if (listen->key && (strcmp(fmt, "Originating-Realm-Key") == 0)) { + strlcpy(out, listen->key, outlen); + return strlen(out); + } +#endif + + cp = cf_pair_find(listen->cs, fmt); + if (!cp || !(value = cf_pair_value(cp))) { + RDEBUG("Listener does not contain config item \"%s\"", fmt); + *out = '\0'; + return 0; + } + + strlcpy(out, value, outlen); + + return strlen(out); +} + + +/* + * Xlat for %{listen:foo} + */ +static ssize_t xlat_listen(UNUSED void *instance, REQUEST *request, + char const *fmt, char *out, size_t outlen) +{ + return xlat_listen_common(request, request->listener, fmt, out, outlen); +} + +/* + * Xlat for %{proxy_listen:foo} + */ +static ssize_t xlat_proxy_listen(UNUSED void *instance, REQUEST *request, + char const *fmt, char *out, size_t outlen) +{ + if (!request->proxy_listener) { + *out = '\0'; + return 0; + } + + return xlat_listen_common(request, request->proxy_listener, fmt, out, outlen); +} + +#ifdef HAVE_SETUID +/* + * Do chroot, if requested. + * + * Switch UID and GID to what is specified in the config file + */ +static int switch_users(CONF_SECTION *cs) +{ + bool do_suid = false; + bool do_sgid = false; + + /* + * Get the current maximum for core files. Do this + * before anything else so as to ensure it's properly + * initialized. + */ + if (fr_set_dumpable_init() < 0) { + return 0; + } + + /* + * Don't do chroot/setuid/setgid if we're in debugging + * as non-root. + */ + if (rad_debug_lvl && (getuid() != 0)) return 1; + + if (cf_section_parse(cs, NULL, bootstrap_config) < 0) { + fr_strerror_printf("Failed to parse user/group information."); + return 0; + } + +#ifdef HAVE_GRP_H + /* + * Get the correct GID for the server. + */ + server_gid = getgid(); + + if (gid_name) { + struct group *gr; + + gr = getgrnam(gid_name); + if (!gr) { + fr_strerror_printf("Cannot get ID for group %s: %s", + gid_name, fr_syserror(errno)); + return 0; + } + + if (server_gid != gr->gr_gid) { + server_gid = gr->gr_gid; + do_sgid = true; + } + } +#endif + + /* + * Get the correct UID for the server. + */ + server_uid = getuid(); + + if (uid_name) { + struct passwd *user; + + if (rad_getpwnam(cs, &user, uid_name) < 0) { + fr_strerror_printf("Cannot get passwd entry for user %s: %s", + uid_name, fr_strerror()); + return 0; + } + + /* + * We're not the correct user. Go set that. + */ + if (server_uid != user->pw_uid) { + server_uid = user->pw_uid; + do_suid = true; +#ifdef HAVE_INITGROUPS + if (initgroups(uid_name, server_gid) < 0) { + fr_strerror_printf("Cannot initialize supplementary group list for user %s: %s", + uid_name, fr_syserror(errno)); + talloc_free(user); + return 0; + } +#endif + } + + talloc_free(user); + } + + /* + * Do chroot BEFORE changing UIDs. + */ + if (chroot_dir) { + if (chroot(chroot_dir) < 0) { + fr_strerror_printf("Failed to perform chroot to %s: %s", + chroot_dir, fr_syserror(errno)); + return 0; + } + + /* + * Note that we leave chdir alone. It may be + * OUTSIDE of the root. This allows us to read + * the configuration from "-d ./etc/raddb", with + * the chroot as "./chroot/" for example. After + * the server has been loaded, it does a "cd + * ${logdir}" below, so that core files (if any) + * go to a logging directory. + * + * This also allows the configuration of the + * server to be outside of the chroot. If the + * server is statically linked, then the only + * things needed inside of the chroot are the + * logging directories. + */ + } + +#ifdef HAVE_GRP_H + /* + * Set the GID. Don't bother checking it. + */ + if (do_sgid) { + if (setgid(server_gid) < 0){ + fr_strerror_printf("Failed setting group to %s: %s", + gid_name, fr_syserror(errno)); + return 0; + } + } +#endif + + /* + * The directories for PID files and logs must exist. We + * need to create them if we're told to write files to + * those directories. + * + * Because this creation is new in 3.0.9, it's a soft + * fail. + * + */ + if (main_config.write_pid) { + char *my_dir; + + my_dir = talloc_strdup(NULL, run_dir); + if (rad_mkdir(my_dir, 0750, server_uid, server_gid) < 0) { + DEBUG("Failed to create run_dir %s: %s", + my_dir, strerror(errno)); + } + talloc_free(my_dir); + } + + if (default_log.dst == L_DST_FILES) { + char *my_dir; + + my_dir = talloc_strdup(NULL, radlog_dir); + if (rad_mkdir(my_dir, 0750, server_uid, server_gid) < 0) { + DEBUG("Failed to create logdir %s: %s", + my_dir, strerror(errno)); + } + talloc_free(my_dir); + } + + /* + * If we don't already have a log file open, open one + * now. We may not have been logging anything yet. The + * server normally starts up fairly quietly. + */ + if ((default_log.dst == L_DST_FILES) && + (default_log.fd < 0)) { + default_log.fd = open(main_config.log_file, + O_WRONLY | O_APPEND | O_CREAT, 0640); + if (default_log.fd < 0) { + fr_strerror_printf("Failed to open log file %s: %s\n", + main_config.log_file, fr_syserror(errno)); + return 0; + } + } + + /* + * If we need to change UID, ensure that the log files + * have the correct owner && group. + * + * We have to do this because some log files MAY already + * have been written as root. We need to change them to + * have the correct ownership before proceeding. + */ + if ((do_suid || do_sgid) && + (default_log.dst == L_DST_FILES)) { + if (fchown(default_log.fd, server_uid, server_gid) < 0) { + fr_strerror_printf("Cannot change ownership of log file %s: %s\n", + main_config.log_file, fr_syserror(errno)); + return 0; + } + } + + /* + * Once we're done with all of the privileged work, + * permanently change the UID. + */ + if (do_suid) { + rad_suid_set_down_uid(server_uid); + rad_suid_down(); + } + + /* + * This also clears the dumpable flag if core dumps + * aren't allowed. + */ + if (fr_set_dumpable(allow_core_dumps) < 0) { + WARN("Failed to allow core dumps - %s", fr_strerror()); + } + + if (allow_core_dumps) { + INFO("Core dumps are enabled"); + } + + return 1; +} +#endif /* HAVE_SETUID */ + +/** Set the global radius config directory. + * + * @param ctx Where to allocate the memory for the path string. + * @param path to config dir root e.g. /usr/local/etc/raddb + */ +void set_radius_dir(TALLOC_CTX *ctx, char const *path) +{ + if (radius_dir) { + char *p; + + memcpy(&p, &radius_dir, sizeof(p)); + talloc_free(p); + radius_dir = NULL; + } + if (path) radius_dir = talloc_strdup(ctx, path); +} + +/** Get the global radius config directory. + * + * @return the global radius config directory. + */ +char const *get_radius_dir(void) +{ + return radius_dir; +} + +static int _dlhandle_free(void **dl_handle) +{ + dlclose(*dl_handle); + return 0; +} + +/* + * Read config files. + * + * This function can ONLY be called from the main server process. + */ +int main_config_init(void) +{ + char const *p = NULL; + CONF_SECTION *cs, *subcs; + struct stat statbuf; + cached_config_t *cc; + char buffer[1024]; + + if (stat(radius_dir, &statbuf) < 0) { + ERROR("Errors reading %s: %s", + radius_dir, fr_syserror(errno)); + return -1; + } + +#ifdef S_IWOTH + if ((statbuf.st_mode & S_IWOTH) != 0) { + ERROR("Configuration directory %s is globally writable. Refusing to start due to insecure configuration.", + radius_dir); + return -1; + } +#endif + +#if 0 && defined(S_IROTH) + if (statbuf.st_mode & S_IROTH != 0) { + ERROR("Configuration directory %s is globally readable. Refusing to start due to insecure configuration.", + radius_dir); + return -1; + } +#endif + INFO("Starting - reading configuration files ..."); + + /* + * We need to load the dictionaries before reading the + * configuration files. This is because of the + * pre-compilation in conffile.c. That should probably + * be fixed to be done as a second stage. + */ + if (!main_config.dictionary_dir) { + main_config.dictionary_dir = DICTDIR; + } + + /* + * About sizeof(REQUEST) + sizeof(RADIUS_PACKET) * 2 + sizeof(VALUE_PAIR) * 400 + * + * Which should be enough for many configurations. + */ + main_config.talloc_pool_size = 8 * 1024; /* default */ + + /* + * Read the distribution dictionaries first, then + * the ones in raddb. + */ + DEBUG2("including dictionary file %s/%s", main_config.dictionary_dir, RADIUS_DICTIONARY); + if (dict_init(main_config.dictionary_dir, RADIUS_DICTIONARY) != 0) { + ERROR("Errors reading dictionary: %s", + fr_strerror()); + return -1; + } + +#define DICT_READ_OPTIONAL(_d, _n) \ +do {\ + switch (dict_read(_d, _n)) {\ + case -1:\ + ERROR("Errors reading %s/%s: %s", _d, _n, fr_strerror());\ + return -1;\ + case 0:\ + DEBUG2("including dictionary file %s/%s", _d,_n);\ + break;\ + default:\ + break;\ + }\ +} while (0) + + /* + * Try to load protocol-specific dictionaries. It's OK + * if they don't exist. + */ +#ifdef WITH_DHCP + DICT_READ_OPTIONAL(main_config.dictionary_dir, "dictionary.dhcp"); +#endif + +#ifdef WITH_VMPS + DICT_READ_OPTIONAL(main_config.dictionary_dir, "dictionary.vqp"); +#endif + + /* + * It's OK if this one doesn't exist. + */ + DICT_READ_OPTIONAL(radius_dir, RADIUS_DICTIONARY); + + cs = cf_section_alloc(NULL, "main", NULL); + if (!cs) return -1; + + /* + * Add a 'feature' subsection off the main config + * We check if it's defined first, as the user may + * have defined their own feature flags, or want + * to manually override the ones set by modules + * or the server. + */ + subcs = cf_section_sub_find(cs, "feature"); + if (!subcs) { + subcs = cf_section_alloc(cs, "feature", NULL); + if (!subcs) return -1; + + cf_section_add(cs, subcs); + } + version_init_features(subcs); + + /* + * Add a 'version' subsection off the main config + * We check if it's defined first, this is for + * backwards compatibility. + */ + subcs = cf_section_sub_find(cs, "version"); + if (!subcs) { + subcs = cf_section_alloc(cs, "version", NULL); + if (!subcs) return -1; + cf_section_add(cs, subcs); + } + version_init_numbers(subcs); + + /* Read the configuration file */ + snprintf(buffer, sizeof(buffer), "%.200s/%.50s.conf", radius_dir, main_config.name); + if (cf_file_read(cs, buffer) < 0) { + ERROR("Errors reading or parsing %s", buffer); + failure: + talloc_free(cs); + return -1; + } + + /* + * Parse environment variables first. + */ + subcs = cf_section_sub_find(cs, "ENV"); + if (subcs) { + char const *attr, *value; + CONF_PAIR *cp; + CONF_ITEM *ci; + + for (ci = cf_item_find_next(subcs, NULL); + ci != NULL; + ci = cf_item_find_next(subcs, ci)) { + + if (cf_item_is_data(ci)) continue; + + if (!cf_item_is_pair(ci)) { + cf_log_err(ci, "Unexpected item in ENV section"); + goto failure; + } + + cp = cf_item_to_pair(ci); + if (cf_pair_operator(cp) != T_OP_EQ) { + cf_log_err(ci, "Invalid operator for item in ENV section"); + goto failure; + } + + attr = cf_pair_attr(cp); + value = cf_pair_value(cp); + if (!value) { + if (unsetenv(attr) < 0) { + cf_log_err(ci, "Failed deleting environment variable %s: %s", + attr, fr_syserror(errno)); + goto failure; + } + } else { + void *handle; + void **handle_p; + + if (setenv(attr, value, 1) < 0) { + cf_log_err(ci, "Failed setting environment variable %s: %s", + attr, fr_syserror(errno)); + goto failure; + } + + /* + * Hacks for LD_PRELOAD. + */ + if (strcmp(attr, "LD_PRELOAD") != 0) continue; + + handle = dlopen(value, RTLD_NOW | RTLD_GLOBAL); + if (!handle) { + cf_log_err(ci, "Failed loading library %s: %s", value, dlerror()); + goto failure; + } + + /* + * Wrap the pointer, so we can set a destructor. + */ + MEM(handle_p = talloc(NULL, void *)); + *handle_p = handle; + talloc_set_destructor(handle_p, _dlhandle_free); + + (void) cf_data_add(subcs, value, handle, NULL); + } + } /* loop over pairs in ENV */ + } /* there's an ENV subsection */ + + /* + * If there was no log destination set on the command line, + * set it now. + */ + if (default_log.dst == L_DST_NULL) { + default_log.dst = L_DST_STDERR; + default_log.fd = STDERR_FILENO; + + if (cf_section_parse(cs, NULL, startup_server_config) == -1) { + fprintf(stderr, "%s: Error: Failed to parse log{} section.\n", + main_config.name); + cf_file_free(cs); + return -1; + } + + if (!radlog_dest) { + fprintf(stderr, "%s: Error: No log destination specified.\n", + main_config.name); + cf_file_free(cs); + return -1; + } + + default_log.fd = -1; + default_log.dst = fr_str2int(log_str2dst, radlog_dest, + L_DST_NUM_DEST); + if (default_log.dst == L_DST_NUM_DEST) { + fprintf(stderr, "%s: Error: Unknown log_destination %s\n", + main_config.name, radlog_dest); + cf_file_free(cs); + return -1; + } + + if (default_log.dst == L_DST_SYSLOG) { + /* + * Make sure syslog_facility isn't NULL + * before using it + */ + if (!syslog_facility) { + fprintf(stderr, "%s: Error: Syslog chosen but no facility was specified\n", + main_config.name); + cf_file_free(cs); + return -1; + } + main_config.syslog_facility = fr_str2int(syslog_facility_table, syslog_facility, -1); + if (main_config.syslog_facility < 0) { + fprintf(stderr, "%s: Error: Unknown syslog_facility %s\n", + main_config.name, syslog_facility); + cf_file_free(cs); + return -1; + } + +#ifdef HAVE_SYSLOG_H + /* + * Call openlog only once, when the + * program starts. + */ + openlog(main_config.name, LOG_PID, main_config.syslog_facility); +#endif + + } else if (default_log.dst == L_DST_FILES) { + if (!main_config.log_file) { + fprintf(stderr, "%s: Error: Specified \"files\" as a log destination, but no log filename was given!\n", + main_config.name); + cf_file_free(cs); + return -1; + } + } + } + +#ifdef HAVE_SETUID + /* + * Switch users as early as possible. + */ + if (!switch_users(cs)) { + fprintf(stderr, "%s: ERROR - %s\n", main_config.name, fr_strerror()); + fr_exit(1); + } +#endif + + /* + * This allows us to figure out where, relative to + * radiusd.conf, the other configuration files exist. + */ + if (cf_section_parse(cs, NULL, server_config) < 0) return -1; + + /* + * Fix up log_auth, and log_accept and log_reject + */ + if (main_config.log_auth) { + main_config.log_accept = main_config.log_reject = true; + } + + /* + * We ignore colourization of output until after the + * configuration files have been parsed. + */ + p = getenv("TERM"); + if (do_colourise && p && isatty(default_log.fd) && strstr(p, "xterm")) { + default_log.colourise = true; + } else { + default_log.colourise = false; + } + + /* + * Starting the server, WITHOUT "-x" on the + * command-line: use whatever is in the config + * file. + */ + if (rad_debug_lvl == 0) { + rad_debug_lvl = main_config.debug_level; + } + fr_debug_lvl = rad_debug_lvl; + + FR_INTEGER_COND_CHECK("max_request_time", main_config.max_request_time, + (main_config.max_request_time != 0), 100); + + /* + * reject_delay can be zero. OR 1 though 10. + */ + if ((main_config.reject_delay.tv_sec != 0) || (main_config.reject_delay.tv_usec != 0)) { + FR_TIMEVAL_BOUND_CHECK("reject_delay", &main_config.reject_delay, >=, 1, 0); + } + FR_TIMEVAL_BOUND_CHECK("reject_delay", &main_config.reject_delay, <=, 10, 0); + + FR_INTEGER_BOUND_CHECK("cleanup_delay", main_config.cleanup_delay, <=, 30); + + FR_INTEGER_BOUND_CHECK("resources.talloc_pool_size", main_config.talloc_pool_size, >=, 2 * 1024); + FR_INTEGER_BOUND_CHECK("resources.talloc_pool_size", main_config.talloc_pool_size, <=, 1024 * 1024); + + /* + * Set default initial request processing delay to 1/3 of a second. + * Will be updated by the lowest response window across all home servers, + * if it is less than this. + */ + main_config.init_delay.tv_sec = 0; + main_config.init_delay.tv_usec = 2* (1000000 / 3); + + /* + * Free the old configuration items, and replace them + * with the new ones. + * + * Note that where possible, we do atomic switch-overs, + * to ensure that the pointers are always valid. + */ + rad_assert(main_config.config == NULL); + root_config = main_config.config = cs; + + DEBUG2("%s: #### Loading Realms and Home Servers ####", main_config.name); + if (!realms_init(cs)) { + return -1; + } + + DEBUG2("%s: #### Loading Clients ####", main_config.name); + if (!client_list_parse_section(cs, false)) { + return -1; + } + + /* + * Register the %{config:section.subsection} xlat function. + */ + xlat_register("config", xlat_config, NULL, NULL); + xlat_register("client", xlat_client, NULL, NULL); + xlat_register("getclient", xlat_getclient, NULL, NULL); + xlat_register("listen", xlat_listen, NULL, NULL); + xlat_register("proxy_listen", xlat_proxy_listen, NULL, NULL); + + /* + * Go update our behaviour, based on the configuration + * changes. + */ + + /* + * Sanity check the configuration for internal + * consistency. + */ + FR_TIMEVAL_BOUND_CHECK("reject_delay", &main_config.reject_delay, <=, main_config.cleanup_delay, 0); + + if (chroot_dir) { + if (chdir(radlog_dir) < 0) { + ERROR("Failed to 'chdir %s' after chroot: %s", + radlog_dir, fr_syserror(errno)); + return -1; + } + } + + cc = talloc_zero(NULL, cached_config_t); + if (!cc) return -1; + + cc->cs = talloc_steal(cc ,cs); + rad_assert(cs_cache == NULL); + cs_cache = cc; + + /* Clear any unprocessed configuration errors */ + (void) fr_strerror(); + + return 0; +} + +/* + * Free the configuration. Called only when the server is exiting. + */ +int main_config_free(void) +{ + virtual_servers_free(0); + + /* + * Clean up the configuration data + * structures. + */ + client_list_free(NULL); + realms_free(); + listen_free(&main_config.listen); + + /* + * Frees current config and any previous configs. + */ + TALLOC_FREE(cs_cache); + dict_free(); + + return 0; +} + +void hup_logfile(void) +{ + int fd, old_fd; + + if (default_log.dst != L_DST_FILES) return; + + fd = open(main_config.log_file, + O_WRONLY | O_APPEND | O_CREAT, 0640); + if (fd >= 0) { + /* + * Atomic swap. We'd like to keep the old + * FD around so that callers don't + * suddenly find the FD closed, and the + * writes go nowhere. But that's hard to + * do. So... we have the case where a + * log message *might* be lost on HUP. + */ + old_fd = default_log.fd; + default_log.fd = fd; + close(old_fd); + } +} + +static int hup_callback(void *ctx, void *data) +{ + CONF_SECTION *modules = ctx; + CONF_SECTION *cs = data; + CONF_SECTION *parent; + char const *name; + module_instance_t *mi; + + /* + * Files may be defined in sub-sections of a module + * config. Walk up the tree until we find the module + * definition. + */ + parent = cf_item_parent(cf_section_to_item(cs)); + while (parent != modules) { + cs = parent; + parent = cf_item_parent(cf_section_to_item(cs)); + + /* + * Something went wrong. Oh well... + */ + if (!parent) return 0; + } + + name = cf_section_name2(cs); + if (!name) name = cf_section_name1(cs); + + mi = module_find(modules, name); + if (!mi) return 0; + + if ((mi->entry->module->type & RLM_TYPE_HUP_SAFE) == 0) return 0; + + if (!module_hup_module(mi->cs, mi, time(NULL))) return 0; + + return 1; +} + +void main_config_hup(void) +{ + int rcode; + cached_config_t *cc; + CONF_SECTION *cs; + time_t when; + char buffer[1024]; + + static time_t last_hup = 0; + + /* + * Re-open the log file. If we can't, then keep logging + * to the old log file. + * + * The "open log file" code is here rather than in log.c, + * because it makes that function MUCH simpler. + */ + hup_logfile(); + + /* + * Only check the config files every few seconds. + */ + when = time(NULL); + if ((last_hup + 2) >= when) { + INFO("HUP - Last HUP was too recent. Ignoring"); + return; + } + last_hup = when; + + rcode = cf_file_changed(cs_cache->cs, hup_callback); + if (rcode == CF_FILE_NONE) { + INFO("HUP - No files changed. Ignoring"); + return; + } + + if (rcode == CF_FILE_ERROR) { + INFO("HUP - Cannot read configuration files. Ignoring"); + return; + } + + /* + * No config files have changed. + */ + if ((rcode & CF_FILE_CONFIG) == 0) { + if ((rcode & CF_FILE_MODULE) != 0) { + INFO("HUP - Files loaded by a module have changed."); + + /* + * FIXME: reload the module. + */ + + } + return; + } + + cs = cf_section_alloc(NULL, "main", NULL); + if (!cs) return; + +#ifdef HAVE_SYSTEMD + sd_notify(0, "RELOADING=1"); +#endif + + /* Read the configuration file */ + snprintf(buffer, sizeof(buffer), "%.200s/%.50s.conf", radius_dir, main_config.name); + + INFO("HUP - Re-reading configuration files"); + if (cf_file_read(cs, buffer) < 0) { + ERROR("Failed to re-read or parse %s", buffer); + talloc_free(cs); + return; + } + + cc = talloc_zero(cs_cache, cached_config_t); + if (!cc) { + ERROR("Out of memory"); + return; + } + + /* + * Save the current configuration. Note that we do NOT + * free older ones. We should probably do so at some + * point. Doing so will require us to mark which modules + * are still in use, and which aren't. Modules that + * can't be HUPed always use the original configuration. + * Modules that can be HUPed use one of the newer + * configurations. + */ + cc->created = time(NULL); + cc->cs = talloc_steal(cc, cs); + cc->next = cs_cache; + cs_cache = cc; + + INFO("HUP - loading modules"); + + /* + * Prefer the new module configuration. + */ + modules_hup(cf_section_sub_find(cs, "modules")); + + /* + * Load new servers BEFORE freeing old ones. + */ + virtual_servers_load(cs); + + virtual_servers_free(cc->created - (main_config.max_request_time * 4)); + +#ifdef HAVE_SYSTEMD + /* + * If RELOADING=1 event is sent then it needed also a "READY=1" notification + * when it completed reloading its configuration. + */ + sd_notify(0, "READY=1"); +#endif +} |