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realms.c
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realms.c
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/*
* realms.c Realm handling code
*
* 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 2007 The FreeRADIUS server project
* Copyright 2007 Alan DeKok <aland@deployingradius.com>
*/
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/realms.h>
#include <freeradius-devel/rad_assert.h>
#include <freeradius-devel/net.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
static rbtree_t *realms_byname = NULL;
#ifdef WITH_TCP
bool home_servers_udp = false;
#endif
#ifdef HAVE_REGEX
typedef struct realm_regex realm_regex_t;
/** Regular expression associated with a realm
*
*/
struct realm_regex {
REALM *realm; //!< The realm this regex matches.
regex_t *preg; //!< The pre-compiled regular expression.
realm_regex_t *next; //!< The next realm in the list of regular expressions.
};
static realm_regex_t *realms_regex = NULL;
#endif /* HAVE_REGEX */
struct realm_config {
CONF_SECTION *cs;
uint32_t dead_time;
uint32_t retry_count;
uint32_t retry_delay;
bool dynamic;
bool fallback;
bool wake_all_if_all_dead;
};
static const FR_NAME_NUMBER home_server_types[] = {
{ "auth", HOME_TYPE_AUTH },
{ "acct", HOME_TYPE_ACCT },
{ "auth+acct", HOME_TYPE_AUTH_ACCT },
{ "coa", HOME_TYPE_COA },
{ NULL, 0 }
};
static const FR_NAME_NUMBER home_ping_check[] = {
{ "none", HOME_PING_CHECK_NONE },
{ "status-server", HOME_PING_CHECK_STATUS_SERVER },
{ "request", HOME_PING_CHECK_REQUEST },
{ NULL, 0 }
};
static realm_config_t *realm_config = NULL;
#ifdef WITH_PROXY
static rbtree_t *home_servers_byaddr = NULL;
static rbtree_t *home_servers_byname = NULL;
#ifdef WITH_STATS
static int home_server_max_number = 0;
static rbtree_t *home_servers_bynumber = NULL;
#endif
static rbtree_t *home_pools_byname = NULL;
/*
* Map the proxy server configuration parameters to variables.
*/
static const CONF_PARSER proxy_config[] = {
{ FR_CONF_OFFSET("retry_delay", PW_TYPE_INTEGER, realm_config_t, retry_delay), .dflt = STRINGIFY(RETRY_DELAY) },
{ FR_CONF_OFFSET("retry_count", PW_TYPE_INTEGER, realm_config_t, retry_count), .dflt = STRINGIFY(RETRY_COUNT) },
{ FR_CONF_OFFSET("default_fallback", PW_TYPE_BOOLEAN, realm_config_t, fallback), .dflt = "no" },
{ FR_CONF_OFFSET("dynamic", PW_TYPE_BOOLEAN, realm_config_t, dynamic) },
{ FR_CONF_OFFSET("dead_time", PW_TYPE_INTEGER, realm_config_t, dead_time), .dflt = STRINGIFY(DEAD_TIME) },
{ FR_CONF_OFFSET("wake_all_if_all_dead", PW_TYPE_BOOLEAN, realm_config_t, wake_all_if_all_dead), .dflt = "no" },
CONF_PARSER_TERMINATOR
};
#endif
static int realm_name_cmp(void const *one, void const *two)
{
REALM const *a = one;
REALM const *b = two;
return strcasecmp(a->name, b->name);
}
#ifdef WITH_PROXY
static void home_server_free(void *data)
{
home_server_t *home = talloc_get_type_abort(data, home_server_t);
talloc_free(home);
}
static int home_server_name_cmp(void const *one, void const *two)
{
home_server_t const *a = one;
home_server_t const *b = two;
if (a->type < b->type) return -1;
if (a->type > b->type) return +1;
return strcasecmp(a->name, b->name);
}
static int home_server_addr_cmp(void const *one, void const *two)
{
int rcode;
home_server_t const *a = one;
home_server_t const *b = two;
if (a->server && !b->server) return -1;
if (!a->server && b->server) return +1;
if (a->server && b->server) {
rcode = a->type - b->type;
if (rcode != 0) return rcode;
return strcmp(a->server, b->server);
}
if (a->port < b->port) return -1;
if (a->port > b->port) return +1;
#ifdef WITH_TCP
if (a->proto < b->proto) return -1;
if (a->proto > b->proto) return +1;
#endif
rcode = fr_ipaddr_cmp(&a->src_ipaddr, &b->src_ipaddr);
if (rcode != 0) return rcode;
return fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
}
#ifdef WITH_STATS
static int home_server_number_cmp(void const *one, void const *two)
{
home_server_t const *a = one;
home_server_t const *b = two;
return (a->number - b->number);
}
#endif
static int home_pool_name_cmp(void const *one, void const *two)
{
home_pool_t const *a = one;
home_pool_t const *b = two;
if (a->server_type < b->server_type) return -1;
if (a->server_type > b->server_type) return +1;
return strcasecmp(a->name, b->name);
}
static size_t CC_HINT(nonnull) xlat_cs(CONF_SECTION *cs, char const *fmt, char *out, size_t outlen)
{
char const *value = NULL;
/*
* Instance name
*/
if (strcmp(fmt, "instance") == 0) {
value = cf_section_name2(cs);
if (!value) {
*out = '\0';
return 0;
}
} else {
CONF_PAIR *cp;
cp = cf_pair_find(cs, fmt);
if (!cp || !(value = cf_pair_value(cp))) {
*out = '\0';
return 0;
}
}
strlcpy(out, value, outlen);
return strlen(out);
}
/** xlat for %{home_server:foo}
*
*/
static ssize_t xlat_home_server(UNUSED TALLOC_CTX *ctx, char **out, size_t outlen,
UNUSED void const *mod_inst, UNUSED void const *xlat_inst,
REQUEST *request, char const *fmt) CC_HINT(nonnull);
static ssize_t xlat_home_server(UNUSED TALLOC_CTX *ctx, char **out, size_t outlen,
UNUSED void const *mod_inst, UNUSED void const *xlat_inst,
REQUEST *request, char const *fmt)
{
if (!request->proxy || !request->proxy->home_server) {
RWDEBUG("No home_server associated with this request");
return 0;
}
if (strcmp(fmt, "state") == 0) {
char const *state;
switch (request->proxy->home_server->state) {
case HOME_STATE_ALIVE:
state = "alive";
break;
case HOME_STATE_ZOMBIE:
state = "zombie";
break;
case HOME_STATE_IS_DEAD:
state = "dead";
break;
default:
state = "unknown";
break;
}
strlcpy(*out, state, outlen);
return strlen(*out);
}
return xlat_cs(request->proxy->home_server->cs, fmt, *out, outlen);
}
/** xlat for %{home_server_pool:foo}
*
*/
static ssize_t xlat_server_pool(UNUSED TALLOC_CTX *ctx, char **out, size_t outlen,
UNUSED void const *mod_inst, UNUSED void const *xlat_inst,
REQUEST *request, char const *fmt) CC_HINT(nonnull);
static ssize_t xlat_server_pool(UNUSED TALLOC_CTX *ctx, char **out, size_t outlen,
UNUSED void const *mod_inst, UNUSED void const *xlat_inst,
REQUEST *request, char const *fmt)
{
if (!request->home_pool) {
RWDEBUG("No home_pool associated with this request");
return 0;
}
if (strcmp(fmt, "state") == 0) {
char const *state;
if (request->home_pool->in_fallback) {
state = "fallback";
} else {
state = "alive";
}
strlcpy(*out, state, outlen);
return strlen(*out);
}
return xlat_cs(request->home_pool->cs, fmt, *out, outlen);
}
#endif
void realms_free(void)
{
#ifdef WITH_PROXY
# ifdef WITH_STATS
talloc_free(home_servers_bynumber);
home_servers_bynumber = NULL;
# endif
talloc_free(home_servers_byname);
home_servers_byname = NULL;
talloc_free(home_servers_byaddr);
home_servers_byaddr = NULL;
talloc_free(home_pools_byname);
home_pools_byname = NULL;
#endif
talloc_free(realms_byname);
realms_byname = NULL;
realm_pool_free(NULL);
talloc_free(realm_config);
realm_config = NULL;
}
#ifdef WITH_PROXY
static CONF_PARSER limit_config[] = {
{ FR_CONF_OFFSET("max_connections", PW_TYPE_INTEGER, home_server_t, limit.max_connections), .dflt = "16" },
{ FR_CONF_OFFSET("max_requests", PW_TYPE_INTEGER, home_server_t, limit.max_requests), .dflt = "0" },
{ FR_CONF_OFFSET("lifetime", PW_TYPE_INTEGER, home_server_t, limit.lifetime), .dflt = "0" },
{ FR_CONF_OFFSET("idle_timeout", PW_TYPE_INTEGER, home_server_t, limit.idle_timeout), .dflt = "0" },
CONF_PARSER_TERMINATOR
};
#ifdef WITH_COA
static CONF_PARSER home_server_coa[] = {
{ FR_CONF_OFFSET("irt", PW_TYPE_INTEGER, home_server_t, coa_irt), .dflt = STRINGIFY(2) },
{ FR_CONF_OFFSET("mrt", PW_TYPE_INTEGER, home_server_t, coa_mrt), .dflt = STRINGIFY(16) },
{ FR_CONF_OFFSET("mrc", PW_TYPE_INTEGER, home_server_t, coa_mrc), .dflt = STRINGIFY(5) },
{ FR_CONF_OFFSET("mrd", PW_TYPE_INTEGER, home_server_t, coa_mrd), .dflt = STRINGIFY(30) },
CONF_PARSER_TERMINATOR
};
#endif
static CONF_PARSER home_server_config[] = {
{ FR_CONF_OFFSET("ipaddr", PW_TYPE_COMBO_IP_ADDR, home_server_t, ipaddr) },
{ FR_CONF_OFFSET("ipv4addr", PW_TYPE_IPV4_ADDR, home_server_t, ipaddr) },
{ FR_CONF_OFFSET("ipv6addr", PW_TYPE_IPV6_ADDR, home_server_t, ipaddr) },
{ FR_CONF_OFFSET("virtual_server", PW_TYPE_STRING | PW_TYPE_NOT_EMPTY, home_server_t, server) },
{ FR_CONF_OFFSET("port", PW_TYPE_SHORT, home_server_t, port), .dflt = "0" },
{ FR_CONF_OFFSET("type", PW_TYPE_STRING, home_server_t, type_str) },
#ifdef WITH_TCP
{ FR_CONF_OFFSET("proto", PW_TYPE_STRING | PW_TYPE_NOT_EMPTY, home_server_t, proto_str) },
#endif
{ FR_CONF_OFFSET("secret", PW_TYPE_STRING | PW_TYPE_SECRET, home_server_t, secret) },
{ FR_CONF_OFFSET("src_ipaddr", PW_TYPE_STRING, home_server_t, src_ipaddr_str) },
{ FR_CONF_OFFSET("response_window", PW_TYPE_TIMEVAL, home_server_t, response_window), .dflt = "30" },
{ FR_CONF_OFFSET("response_timeouts", PW_TYPE_INTEGER, home_server_t, max_response_timeouts), .dflt = "1" },
{ FR_CONF_OFFSET("max_outstanding", PW_TYPE_INTEGER, home_server_t, max_outstanding), .dflt = "65536" },
{ FR_CONF_OFFSET("zombie_period", PW_TYPE_INTEGER, home_server_t, zombie_period), .dflt = "40" },
{ FR_CONF_OFFSET("status_check", PW_TYPE_STRING, home_server_t, ping_check_str), .dflt = "none" },
{ FR_CONF_OFFSET("ping_check", PW_TYPE_STRING, home_server_t, ping_check_str) },
{ FR_CONF_OFFSET("ping_interval", PW_TYPE_INTEGER, home_server_t, ping_interval), .dflt = "30" },
{ FR_CONF_OFFSET("check_interval", PW_TYPE_INTEGER, home_server_t, ping_interval) },
{ FR_CONF_OFFSET("check_timeout", PW_TYPE_INTEGER, home_server_t, ping_timeout), .dflt = "4" },
{ FR_CONF_OFFSET("status_check_timeout", PW_TYPE_INTEGER, home_server_t, ping_timeout) },
{ FR_CONF_OFFSET("num_answers_to_alive", PW_TYPE_INTEGER, home_server_t, num_pings_to_alive), .dflt = "3" },
{ FR_CONF_OFFSET("revive_interval", PW_TYPE_INTEGER, home_server_t, revive_interval), .dflt = "300" },
{ FR_CONF_OFFSET("username", PW_TYPE_STRING | PW_TYPE_NOT_EMPTY, home_server_t, ping_user_name) },
{ FR_CONF_OFFSET("password", PW_TYPE_STRING | PW_TYPE_NOT_EMPTY, home_server_t, ping_user_password) },
#ifdef WITH_STATS
{ FR_CONF_OFFSET("historic_average_window", PW_TYPE_INTEGER, home_server_t, ema.window) },
#endif
{ FR_CONF_POINTER("limit", PW_TYPE_SUBSECTION, NULL), .subcs = (void const *) limit_config },
#ifdef WITH_COA
{ FR_CONF_POINTER("coa", PW_TYPE_SUBSECTION, NULL), .subcs = (void const *) home_server_coa },
#endif
{ FR_CONF_OFFSET("self", PW_TYPE_BOOLEAN, home_server_t, is_ourself), },
CONF_PARSER_TERMINATOR
};
/*
* Ensure that all of the parameters in the home server are OK.
*/
void realm_home_server_sanitize(home_server_t *home, CONF_SECTION *cs)
{
CONF_SECTION *parent = NULL;
FR_INTEGER_BOUND_CHECK("max_outstanding", home->max_outstanding, >=, 8);
FR_INTEGER_BOUND_CHECK("max_outstanding", home->max_outstanding, <=, 65536*16);
FR_INTEGER_BOUND_CHECK("ping_interval", home->ping_interval, >=, 6);
FR_INTEGER_BOUND_CHECK("ping_interval", home->ping_interval, <=, 120);
FR_TIMEVAL_BOUND_CHECK("response_window", &home->response_window, >=, 0, 1000);
FR_TIMEVAL_BOUND_CHECK("response_window", &home->response_window, <=, 60, 0);
FR_TIMEVAL_BOUND_CHECK("response_window", &home->response_window, <=,
main_config.max_request_time, 0);
FR_INTEGER_BOUND_CHECK("response_timeouts", home->max_response_timeouts, >=, 1);
FR_INTEGER_BOUND_CHECK("response_timeouts", home->max_response_timeouts, <=, 1000);
/*
* Track the minimum response window, so that we can
* correctly set the timers in process.c
*/
if (fr_timeval_cmp(&main_config.init_delay, &home->response_window) > 0) {
main_config.init_delay = home->response_window;
}
FR_INTEGER_BOUND_CHECK("zombie_period", home->zombie_period, >=, 1);
FR_INTEGER_BOUND_CHECK("zombie_period", home->zombie_period, <=, 120);
FR_INTEGER_BOUND_CHECK("zombie_period", home->zombie_period, >=, (uint32_t) home->response_window.tv_sec);
FR_INTEGER_BOUND_CHECK("num_pings_to_alive", home->num_pings_to_alive, >=, 3);
FR_INTEGER_BOUND_CHECK("num_pings_to_alive", home->num_pings_to_alive, <=, 10);
FR_INTEGER_BOUND_CHECK("check_timeout", home->ping_timeout, >=, 1);
FR_INTEGER_BOUND_CHECK("check_timeout", home->ping_timeout, <=, 10);
FR_INTEGER_BOUND_CHECK("revive_interval", home->revive_interval, >=, 60);
FR_INTEGER_BOUND_CHECK("revive_interval", home->revive_interval, <=, 3600);
#ifdef WITH_COA
FR_INTEGER_BOUND_CHECK("coa_irt", home->coa_irt, >=, 1);
FR_INTEGER_BOUND_CHECK("coa_irt", home->coa_irt, <=, 5);
FR_INTEGER_BOUND_CHECK("coa_mrc", home->coa_mrc, <=, 20);
FR_INTEGER_BOUND_CHECK("coa_mrt", home->coa_mrt, <=, 30);
FR_INTEGER_BOUND_CHECK("coa_mrd", home->coa_mrd, >=, 5);
FR_INTEGER_BOUND_CHECK("coa_mrd", home->coa_mrd, <=, 60);
#endif
FR_INTEGER_BOUND_CHECK("max_connections", home->limit.max_connections, <=, 1024);
#ifdef WITH_TCP
/*
* UDP sockets can't be connection limited.
*/
if (home->proto != IPPROTO_TCP) home->limit.max_connections = 0;
#endif
if ((home->limit.idle_timeout > 0) && (home->limit.idle_timeout < 5))
home->limit.idle_timeout = 5;
if ((home->limit.lifetime > 0) && (home->limit.lifetime < 5))
home->limit.lifetime = 5;
if ((home->limit.lifetime > 0) && (home->limit.idle_timeout > home->limit.lifetime))
home->limit.idle_timeout = 0;
/*
* Make sure that this is set.
*/
if (home->src_ipaddr.af == AF_UNSPEC) {
home->src_ipaddr.af = home->ipaddr.af;
}
parent = cf_item_parent(cf_section_to_item(cs));
if (parent && strcmp(cf_section_name1(parent), "server") == 0) {
home->parent_server = cf_section_name2(parent);
}
}
/** Insert a new home server into the various internal lookup trees
*
* @param home server to add.
* @param cs That defined the home server.
* @return
* - true on success.
* - false on failure.
*/
static bool home_server_insert(home_server_t *home, CONF_SECTION *cs)
{
if (home->name && !rbtree_insert(home_servers_byname, home)) {
cf_log_err_cs(cs, "Internal error %d adding home server %s", __LINE__, home->log_name);
return false;
}
if (!home->server && !rbtree_insert(home_servers_byaddr, home)) {
rbtree_deletebydata(home_servers_byname, home);
cf_log_err_cs(cs, "Internal error %d adding home server %s", __LINE__, home->log_name);
return false;
}
#ifdef WITH_STATS
home->number = home_server_max_number++;
if (!rbtree_insert(home_servers_bynumber, home)) {
rbtree_deletebydata(home_servers_byname, home);
if (home->ipaddr.af != AF_UNSPEC) {
rbtree_deletebydata(home_servers_byname, home);
}
cf_log_err_cs(cs, "Internal error %d adding home server %s", __LINE__, home->log_name);
return false;
}
#endif
return true;
}
/** Add an already allocate home_server_t to the various trees
*
* @param home server to add.
* @return
* - true on success.
* - false on error.
*/
bool realm_home_server_add(home_server_t *home)
{
/*
* The structs aren't mutex protected. Refuse to destroy
* the server.
*/
if (event_loop_started && !realm_config->dynamic) {
ERROR("Failed to add dynamic home server, \"dynamic = yes\" must be set in proxy.conf");
return false;
}
if (home->name && (rbtree_finddata(home_servers_byname, home) != NULL)) {
cf_log_err_cs(home->cs, "Duplicate home server name %s", home->name);
return false;
}
if (!home->server && (rbtree_finddata(home_servers_byaddr, home) != NULL)) {
char buffer[INET6_ADDRSTRLEN];
inet_ntop(home->ipaddr.af, &home->ipaddr.ipaddr, buffer, sizeof(buffer));
cf_log_err_cs(home->cs, "Duplicate home server address%s%s%s: %s:%s%s/%i",
home->name ? " (already in use by " : "",
home->name ? home->name : "",
home->name ? ")" : "",
buffer,
fr_int2str(fr_net_ip_proto_table, home->proto, "<INVALID>"),
#ifdef WITH_TLS
home->tls ? "+tls" : "",
#else
"",
#endif
home->port);
return false;
}
if (!home_server_insert(home, home->cs)) return false;
/*
* Dual home servers cause us to auto-create an
* accounting server for UDP sockets, and leave
* everything alone for TLS sockets.
*
* Home servers which are virtual servers can be "auth+acct".
*/
if (home->dual && !home->server
#ifdef WITH_TLS
&& !home->tls
#endif
) {
home_server_t *home2 = talloc(talloc_parent(home), home_server_t);
memcpy(home2, home, sizeof(*home2));
home2->type = HOME_TYPE_ACCT;
home2->dual = true;
home2->port++;
home2->ping_user_password = NULL;
home2->cs = home->cs;
home2->parent_server = home->parent_server;
if (!home_server_insert(home2, home->cs)) {
talloc_free(home2);
return false;
}
}
/*
* Mark it as already processed
*/
cf_data_add(home->cs, home, NULL, false);
return true;
}
/** Alloc a new home server defined by a #CONF_SECTION
*
* @param ctx to allocate home_server_t in.
* @param rc Realm config, may be NULL in which case the global realm_config will be used.
* @param cs Configuration section containing home server parameters.
* @return
* - New #home_server_t alloced in the context of the realm_config.
* - NULL on error.
*/
home_server_t *home_server_afrom_cs(TALLOC_CTX *ctx, realm_config_t *rc, CONF_SECTION *cs)
{
home_server_t *home;
CONF_SECTION *tls;
if (!rc) rc = realm_config; /* Use the global config */
home = talloc_zero(ctx, home_server_t);
home->name = cf_section_name2(cs);
home->log_name = talloc_typed_strdup(home, home->name);
home->cs = cs;
home->state = HOME_STATE_UNKNOWN;
home->proto = IPPROTO_UDP;
/*
* Parse the configuration into the home server
* struct.
*/
if (cf_section_parse(home, home, cs, home_server_config) < 0) goto error;
/*
* It has an IP address, it must be a remote server.
*/
if (cf_pair_find(cs, "ipaddr") || cf_pair_find(cs, "ipv4addr") || cf_pair_find(cs, "ipv6addr")) {
if (fr_is_inaddr_any(&home->ipaddr) == 1) {
cf_log_err_cs(cs, "Wildcard '*' addresses are not permitted for home servers");
goto error;
}
if (!home->log_name) {
char buffer[FR_IPADDR_PREFIX_STRLEN];
fr_inet_ntop_prefix(buffer, sizeof(buffer), &home->ipaddr);
home->log_name = talloc_asprintf(home, "%s:%i", buffer, home->port);
}
/*
* If it has a 'virtual_Server' config item, it's
* a loopback into a virtual server.
*/
} else if (cf_pair_find(cs, "virtual_server") != NULL) {
home->ipaddr.af = AF_UNSPEC; /* mark ipaddr as unused */
if (!home->server) {
cf_log_err_cs(cs, "Invalid value for virtual_server");
goto error;
}
/*
* Try and find a 'server' section off the root of
* the config with a name that matches the
* virtual_server.
*/
if (!cf_subsection_find_name2(rc->cs, "server", home->server)) {
cf_log_err_cs(cs, "No such server %s", home->server);
goto error;
}
home->secret = "";
home->log_name = talloc_typed_strdup(home, home->server);
/*
* Otherwise it's an invalid config section and we
* raise an error.
*/
} else {
cf_log_err_cs(cs, "No ipaddr, ipv4addr, ipv6addr, or virtual_server defined "
"for home server");
error:
talloc_free(home);
return false;
}
/*
* Check the TLS configuration.
*/
tls = cf_subsection_find(cs, "tls");
if (tls && home->ipaddr.af == AF_UNSPEC) {
cf_log_err_cs(cs, "TLS transport cannot be used for home servers with 'virtual_server' set");
goto error;
}
#ifndef WITH_TLS
if (tls) {
cf_log_err_cs(cs, "TLS transport is not available in this executable");
goto error;
}
#endif
/*
* Need to figure out what we're using for status check
* first, as it's used by the code below.
*/
{
home_ping_check_t type = HOME_PING_CHECK_NONE;
if (home->ping_check_str) type = fr_str2int(home_ping_check, home->ping_check_str,
HOME_PING_CHECK_INVALID);
switch (type) {
case HOME_PING_CHECK_STATUS_SERVER:
case HOME_PING_CHECK_NONE:
break;
case HOME_PING_CHECK_REQUEST:
if (!home->ping_user_name) {
cf_log_err_cs(cs, "You must supply a 'username' to enable status_check=request");
goto error;
}
if (((home->type == HOME_TYPE_AUTH) ||
(home->type == HOME_TYPE_AUTH_ACCT)) && !home->ping_user_password) {
cf_log_err_cs(cs, "You must supply a 'password' to enable status_check=request");
goto error;
}
break;
case HOME_PING_CHECK_INVALID:
cf_log_err_cs(cs, "Invalid status_check \"%s\" for home server %s",
home->ping_check_str, home->log_name);
goto error;
}
home->ping_check = type;
}
if (home->ipaddr.af == AF_UNSPEC) {
if (home->proto_str) {
cf_log_err_cs(cs, "The 'proto' configuration cannot be used for home servers with "
"'virtual_server' set");
goto error;
}
} else {
int proto = IPPROTO_UDP;
if (home->proto_str) proto = fr_str2int(fr_net_ip_proto_table, home->proto_str, -1);
switch (proto) {
case IPPROTO_UDP:
home_servers_udp = true;
break;
case IPPROTO_TCP:
#ifndef WITH_TCP
cf_log_err_cs(cs, "Server not built with support for RADIUS over TCP");
goto error;
#endif
if (home->ping_check != HOME_PING_CHECK_NONE) {
cf_log_err_cs(cs, "Only 'status_check = none' is allowed for home "
"servers with 'proto = tcp'");
goto error;
}
break;
default:
cf_log_err_cs(cs, "Unknown proto \"%s\"", home->proto_str);
goto error;
}
home->proto = proto;
}
{
home_type_t type = HOME_TYPE_AUTH_ACCT;
if (home->type_str) type = fr_str2int(home_server_types, home->type_str, HOME_TYPE_INVALID);
home->type = type;
switch (type) {
case HOME_TYPE_AUTH_ACCT:
#ifdef WITH_TLS
if (!tls && !home->server) home->type = HOME_TYPE_AUTH;
#endif
home->dual = true;
break;
case HOME_TYPE_AUTH:
case HOME_TYPE_ACCT:
break;
#ifdef WITH_COA
case HOME_TYPE_COA:
if (home->server != NULL) {
cf_log_err_cs(cs, "Home servers of type \"coa\" cannot point to a virtual server");
goto error;
}
break;
#endif
case HOME_TYPE_INVALID:
cf_log_err_cs(cs, "Invalid type \"%s\" for home server %s", home->type_str, home->log_name);
goto error;
}
}
if (!home->server && rbtree_finddata(home_servers_byaddr, home)) {
cf_log_err_cs(cs, "Duplicate home server");
goto error;
}
/*
* If were doing RADSEC (tls+tcp) the secret should default
* to radsec, else a secret must be set.
*/
if (!home->secret) {
#ifdef WITH_TLS
if (tls && (home->proto == IPPROTO_TCP)) {
home->secret = "radsec";
} else
#endif
{
cf_log_err_cs(cs, "No shared secret defined for home server %s", home->log_name);
goto error;
}
}
/*
* Virtual servers have some TLS restrictions.
*/
if (home->server) {
if (tls) {
cf_log_err_cs(cs, "Virtual home_servers cannot have a \"tls\" subsection");
goto error;
}
} else {
/*
* If the home is not a virtual server, guess the port
* and look up the source ip address.
*/
rad_assert(home->ipaddr.af != AF_UNSPEC);
#ifdef WITH_TLS
if (tls && (home->proto != IPPROTO_TCP)) {
cf_log_err_cs(cs, "TLS transport is not available for UDP sockets");
goto error;
}
#endif
/*
* Set the default port if necessary.
*/
if (home->port == 0) {
char buffer[FR_IPADDR_PREFIX_STRLEN];
/*
* For RADSEC we use the special RADIUS over TCP/TLS port
* for both accounting and authentication, but for some
* bizarre reason for RADIUS over plain TCP we use separate
* ports 1812 and 1813.
*/
#ifdef WITH_TLS
if (tls) {
home->port = PW_RADIUS_TLS_PORT;
} else
#endif
switch (home->type) {
default:
rad_assert(0);
/* FALL-THROUGH */
case HOME_TYPE_AUTH:
home->port = PW_AUTH_UDP_PORT;
break;
case HOME_TYPE_ACCT:
home->port = PW_ACCT_UDP_PORT;
break;
case HOME_TYPE_COA:
home->port = PW_COA_UDP_PORT;
break;
}
/*
* Now that we have a real port, use that.
*/
talloc_const_free(home->log_name);
fr_inet_ntop_prefix(buffer, sizeof(buffer), &home->ipaddr);
home->log_name = talloc_asprintf(home, "%s:%i", buffer, home->port);
}
/*
* If we have a src_ipaddr_str resolve it to
* the same address family as the destination
* IP.
*/
if (home->src_ipaddr_str) {
if (fr_inet_hton(&home->src_ipaddr, home->ipaddr.af, home->src_ipaddr_str, false) < 0) {
cf_log_err_cs(cs, "Failed parsing src_ipaddr");
goto error;
}
/*
* Source isn't specified, set it to the
* correct address family, but leave it as
* zeroes.
*/
} else {
home->src_ipaddr.af = home->ipaddr.af;
}
#ifdef WITH_TLS
/*
* Parse the SSL client configuration.
*/
if (tls) {
home->tls = tls_conf_parse_client(tls);
if (!home->tls) {
goto error;
}
}
#endif
} /* end of parse home server */
realm_home_server_sanitize(home, cs);
return home;
}
/** Fixup a client configuration section to specify a home server
*
* This is used to create the equivalent CoA home server entry for a client,
* so that the server can originate CoA messages.
*
* The server section automatically inherits the following fields from the client:
* - ipaddr/ipv4addr/ipv6addr
* - secret
* - src_ipaddr
*
* @note new CONF_SECTION will be allocated in the context of the client, but the client
* C#ONF_SECTION will not be modified.
*
* @param client CONF_SECTION to inherit values from.
* @return
* - A new server #CONF_SECTION.
* - A pointer to the existing #CONF_SECTION in the client.
*/
CONF_SECTION *home_server_cs_afrom_client(CONF_SECTION *client)
{
CONF_SECTION *server, *cs;
CONF_PAIR *cp;
/*
* Alloc a plain home server for both cases
*
* There's no way these can be referenced by a pool,
* and they may conflict with home servers in proxy.conf
* so it's easier to not set a name.
*/
/*
*
* Duplicate the server section, so we don't mangle
* the client CONF_SECTION we were passed.
*/
cs = cf_subsection_find(client, "coa_server");
if (cs) {
server = cf_section_dup(client, cs, "home_server", NULL, true);
} else {
server = cf_section_alloc(client, "home_server", cf_section_name2(client));
}
if (!cs || (!cf_pair_find(cs, "ipaddr") && !cf_pair_find(cs, "ipv4addr") && !cf_pair_find(cs, "ipv6addr"))) {
cp = cf_pair_find(client, "ipaddr");
if (!cp) cp = cf_pair_find(client, "ipv4addr");
if (!cp) cp = cf_pair_find(client, "ipv6addr");
cf_pair_add(server, cf_pair_dup(server, cp));
}
if (!cs || !cf_pair_find(cs, "secret")) {
cp = cf_pair_find(client, "secret");
if (cp) cf_pair_add(server, cp);
}
if (!cs || !cf_pair_find(cs, "src_ipaddr")) {
cp = cf_pair_find(client, "src_ipaddr");
if (cp) cf_pair_add(server, cf_pair_dup(server, cp));
}
if (!cs || !(cp = cf_pair_find(cs, "type"))) {
cp = cf_pair_alloc(server, "type", "coa", T_OP_EQ, T_BARE_WORD, T_SINGLE_QUOTED_STRING);
if (cp) cf_pair_add(server, cf_pair_dup(server, cp));
} else if (strcmp(cf_pair_value(cp), "coa") != 0) {
talloc_free(server);
cf_log_err_cs(server, "server.type must be \"coa\"");
return NULL;
}
return server;