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client.c
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client.c
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/*
* This program is 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
*/
/**
* $Id$
* @file main/client.c
* @brief Manage clients allowed to communicate with the server.
*
* @copyright 2015 Arran Cudbard-Bell <a.cudbardb@freeradius.org>
* @copyright 2000,2006 The FreeRADIUS server project
* @copyright 2000 Alan DeKok <aland@ox.org>
* @copyright 2000 Miquel van Smoorenburg <miquels@cistron.nl>
*/
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/rad_assert.h>
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#ifdef WITH_DYNAMIC_CLIENTS
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif
#endif
struct radclient_list {
/*
* FIXME: One set of trees for IPv4, and another for IPv6?
*/
rbtree_t *trees[129]; /* for 0..128, inclusive. */
uint32_t min_prefix;
};
#ifdef WITH_STATS
static rbtree_t *tree_num = NULL; /* client numbers 0..N */
static int tree_num_max = 0;
#endif
static RADCLIENT_LIST *root_clients = NULL;
#ifdef WITH_DYNAMIC_CLIENTS
static fr_fifo_t *deleted_clients = NULL;
#endif
/*
* Callback for freeing a client.
*/
void client_free(RADCLIENT *client)
{
if (!client) return;
#ifdef WITH_DYNAMIC_CLIENTS
if (client->dynamic == 2) {
time_t now;
if (!deleted_clients) {
deleted_clients = fr_fifo_create(1024, (void (*)(void *))client_free);
if (!deleted_clients) return; /* MEMLEAK */
}
/*
* Mark it as in the fifo, and remember when we
* pushed it.
*/
client->dynamic = 3;
client->created = now = time(NULL); /* re-set it */
fr_fifo_push(deleted_clients, client);
/*
* Peek at the head of the fifo. If it might
* still be in use, return. Otherwise, pop it
* from the queue and delete it.
*/
client = fr_fifo_peek(deleted_clients);
if ((client->created + 120) >= now) return;
client = fr_fifo_pop(deleted_clients);
rad_assert(client != NULL);
}
#endif
talloc_free(client);
}
/*
* Callback for comparing two clients.
*/
static int client_ipaddr_cmp(void const *one, void const *two)
{
RADCLIENT const *a = one;
RADCLIENT const *b = two;
#ifndef WITH_TCP
return fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
#else
int rcode;
rcode = fr_ipaddr_cmp(&a->ipaddr, &b->ipaddr);
if (rcode != 0) return rcode;
/*
* Wildcard match
*/
if ((a->proto == IPPROTO_IP) ||
(b->proto == IPPROTO_IP)) return 0;
return (a->proto - b->proto);
#endif
}
#ifdef WITH_STATS
static int client_num_cmp(void const *one, void const *two)
{
RADCLIENT const *a = one;
RADCLIENT const *b = two;
return (a->number - b->number);
}
#endif
/*
* Free a RADCLIENT list.
*/
void client_list_free(RADCLIENT_LIST *clients)
{
int i;
if (!clients) clients = root_clients;
if (!clients) return; /* Clients may not have been initialised yet */
for (i = 0; i <= 128; i++) {
if (clients->trees[i]) rbtree_free(clients->trees[i]);
clients->trees[i] = NULL;
}
if (clients == root_clients) {
#ifdef WITH_STATS
if (tree_num) rbtree_free(tree_num);
tree_num = NULL;
tree_num_max = 0;
#endif
root_clients = NULL;
}
#ifdef WITH_DYNAMIC_CLIENTS
/*
* FIXME: No fr_fifo_delete()
*/
#endif
talloc_free(clients);
}
/*
* Return a new, initialized, set of clients.
*/
RADCLIENT_LIST *client_list_init(CONF_SECTION *cs)
{
RADCLIENT_LIST *clients = talloc_zero(cs, RADCLIENT_LIST);
if (!clients) return NULL;
clients->min_prefix = 128;
return clients;
}
/** Add a client to a RADCLIENT_LIST
*
* @param clients list to add client to, may be NULL if global client list is being used.
* @param client to add.
* @return true on success, false on failure.
*/
bool client_add(RADCLIENT_LIST *clients, RADCLIENT *client)
{
RADCLIENT *old;
char buffer[INET6_ADDRSTRLEN + 3];
if (!client) return false;
/*
* Hack to fixup wildcard clients
*
* If the IP is all zeros, with a 32 or 128 bit netmask
* assume the user meant to configure 0.0.0.0/0 instead
* of 0.0.0.0/32 - which would require the src IP of
* the client to be all zeros.
*/
if (fr_inaddr_any(&client->ipaddr) == 1) switch (client->ipaddr.af) {
case AF_INET:
if (client->ipaddr.prefix == 32) client->ipaddr.prefix = 0;
break;
case AF_INET6:
if (client->ipaddr.prefix == 128) client->ipaddr.prefix = 0;
break;
default:
rad_assert(0);
}
fr_ntop(buffer, sizeof(buffer), &client->ipaddr);
DEBUG3("Adding client %s (%s) to prefix tree %i", buffer, client->longname, client->ipaddr.prefix);
/*
* If the client also defines a server, do that now.
*/
if (client->defines_coa_server) if (!realm_home_server_add(client->coa_server)) return false;
/*
* If "clients" is NULL, it means add to the global list,
* unless we're trying to add it to a virtual server...
*/
if (!clients) {
if (client->server != NULL) {
CONF_SECTION *cs;
CONF_SECTION *listen;
cs = cf_section_sub_find_name2(main_config.config, "server", client->server);
if (!cs) {
ERROR("Failed to find virtual server %s", client->server);
return false;
}
/*
* If this server has no "listen" section, add the clients
* to the global client list.
*/
listen = cf_section_sub_find(cs, "listen");
if (!listen) goto global_clients;
/*
* If the client list already exists, use that.
* Otherwise, create a new client list.
*/
clients = cf_data_find(cs, "clients");
if (!clients) {
clients = client_list_init(cs);
if (!clients) {
ERROR("Out of memory");
return false;
}
if (cf_data_add(cs, "clients", clients, (void (*)(void *)) client_list_free) < 0) {
ERROR("Failed to associate clients with virtual server %s", client->server);
client_list_free(clients);
return false;
}
}
} else {
global_clients:
/*
* Initialize the global list, if not done already.
*/
if (!root_clients) {
root_clients = client_list_init(NULL);
if (!root_clients) return false;
}
clients = root_clients;
}
}
/*
* Create a tree for it.
*/
if (!clients->trees[client->ipaddr.prefix]) {
clients->trees[client->ipaddr.prefix] = rbtree_create(clients, client_ipaddr_cmp, NULL, 0);
if (!clients->trees[client->ipaddr.prefix]) {
return false;
}
}
#define namecmp(a) ((!old->a && !client->a) || (old->a && client->a && (strcmp(old->a, client->a) == 0)))
/*
* Cannot insert the same client twice.
*/
old = rbtree_finddata(clients->trees[client->ipaddr.prefix], client);
if (old) {
/*
* If it's a complete duplicate, then free the new
* one, and return "OK".
*/
if ((fr_ipaddr_cmp(&old->ipaddr, &client->ipaddr) == 0) &&
(old->ipaddr.prefix == client->ipaddr.prefix) &&
namecmp(longname) && namecmp(secret) &&
namecmp(shortname) && namecmp(nas_type) &&
namecmp(login) && namecmp(password) && namecmp(server) &&
#ifdef WITH_DYNAMIC_CLIENTS
(old->lifetime == client->lifetime) &&
namecmp(client_server) &&
#endif
#ifdef WITH_COA
namecmp(coa_name) &&
(old->coa_server == client->coa_server) &&
(old->coa_pool == client->coa_pool) &&
#endif
(old->message_authenticator == client->message_authenticator)) {
WARN("Ignoring duplicate client %s", client->longname);
client_free(client);
return true;
}
ERROR("Failed to add duplicate client %s", client->shortname);
return false;
}
#undef namecmp
/*
* Other error adding client: likely is fatal.
*/
if (!rbtree_insert(clients->trees[client->ipaddr.prefix], client)) {
return false;
}
#ifdef WITH_STATS
if (!tree_num) {
tree_num = rbtree_create(clients, client_num_cmp, NULL, 0);
}
#ifdef WITH_DYNAMIC_CLIENTS
/*
* More catching of clients added by rlm_sql.
*
* The sql modules sets the dynamic flag BEFORE calling
* us. The client_afrom_request() function sets it AFTER
* calling us.
*/
if (client->dynamic && (client->lifetime == 0)) {
RADCLIENT *network;
/*
* If there IS an enclosing network,
* inherit the lifetime from it.
*/
network = client_find(clients, &client->ipaddr, client->proto);
if (network) {
client->lifetime = network->lifetime;
}
}
#endif
client->number = tree_num_max;
tree_num_max++;
if (tree_num) rbtree_insert(tree_num, client);
#endif
if (client->ipaddr.prefix < clients->min_prefix) {
clients->min_prefix = client->ipaddr.prefix;
}
(void) talloc_steal(clients, client); /* reparent it */
return true;
}
#ifdef WITH_DYNAMIC_CLIENTS
void client_delete(RADCLIENT_LIST *clients, RADCLIENT *client)
{
if (!client) return;
if (!clients) clients = root_clients;
if (!client->dynamic) return;
rad_assert(client->ipaddr.prefix <= 128);
client->dynamic = 2; /* signal to client_free */
#ifdef WITH_STATS
rbtree_deletebydata(tree_num, client);
#endif
rbtree_deletebydata(clients->trees[client->ipaddr.prefix], client);
}
#endif
#ifdef WITH_STATS
/*
* Find a client in the RADCLIENTS list by number.
* This is a support function for the statistics code.
*/
RADCLIENT *client_findbynumber(RADCLIENT_LIST const *clients, int number)
{
if (!clients) clients = root_clients;
if (!clients) return NULL;
if (number >= tree_num_max) return NULL;
if (tree_num) {
RADCLIENT myclient;
myclient.number = number;
return rbtree_finddata(tree_num, &myclient);
}
return NULL;
}
#else
RADCLIENT *client_findbynumber(UNUSED const RADCLIENT_LIST *clients, UNUSED int number)
{
return NULL;
}
#endif
/*
* Find a client in the RADCLIENTS list.
*/
RADCLIENT *client_find(RADCLIENT_LIST const *clients, fr_ipaddr_t const *ipaddr, int proto)
{
int32_t i, max_prefix;
RADCLIENT myclient;
if (!clients) clients = root_clients;
if (!clients || !ipaddr) return NULL;
switch (ipaddr->af) {
case AF_INET:
max_prefix = 32;
break;
case AF_INET6:
max_prefix = 128;
break;
default :
return NULL;
}
for (i = max_prefix; i >= (int32_t) clients->min_prefix; i--) {
void *data;
myclient.ipaddr = *ipaddr;
myclient.proto = proto;
fr_ipaddr_mask(&myclient.ipaddr, i);
if (!clients->trees[i]) continue;
data = rbtree_finddata(clients->trees[i], &myclient);
if (data) return data;
}
return NULL;
}
/*
* Old wrapper for client_find
*/
RADCLIENT *client_find_old(fr_ipaddr_t const *ipaddr)
{
return client_find(root_clients, ipaddr, IPPROTO_UDP);
}
static fr_ipaddr_t cl_ipaddr;
static char const *cl_srcipaddr = NULL;
#ifdef WITH_TCP
static char const *hs_proto = NULL;
#endif
#ifdef WITH_TCP
static CONF_PARSER limit_config[] = {
{ "max_connections", FR_CONF_OFFSET(PW_TYPE_INTEGER, RADCLIENT, limit.max_connections), "16" },
{ "lifetime", FR_CONF_OFFSET(PW_TYPE_INTEGER, RADCLIENT, limit.lifetime), "0" },
{ "idle_timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, RADCLIENT, limit.idle_timeout), "30" },
{ NULL, -1, 0, NULL, NULL } /* end the list */
};
#endif
static const CONF_PARSER client_config[] = {
{ "ipaddr", FR_CONF_POINTER(PW_TYPE_COMBO_IP_PREFIX, &cl_ipaddr), NULL },
{ "ipv4addr", FR_CONF_POINTER(PW_TYPE_IPV4_PREFIX, &cl_ipaddr), NULL },
{ "ipv6addr", FR_CONF_POINTER(PW_TYPE_IPV6_PREFIX, &cl_ipaddr), NULL },
{ "src_ipaddr", FR_CONF_POINTER(PW_TYPE_STRING, &cl_srcipaddr), NULL },
{ "require_message_authenticator", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, RADCLIENT, message_authenticator), "no" },
{ "secret", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, RADCLIENT, secret), NULL },
{ "shortname", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, shortname), NULL },
{ "nas_type", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, nas_type), NULL },
{ "login", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, login), NULL },
{ "password", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, password), NULL },
{ "virtual_server", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, server), NULL },
{ "response_window", FR_CONF_OFFSET(PW_TYPE_TIMEVAL, RADCLIENT, response_window), NULL },
#ifdef WITH_TCP
{ "proto", FR_CONF_POINTER(PW_TYPE_STRING, &hs_proto), NULL },
{ "limit", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) limit_config },
#endif
#ifdef WITH_DYNAMIC_CLIENTS
{ "dynamic_clients", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, client_server), NULL },
{ "lifetime", FR_CONF_OFFSET(PW_TYPE_INTEGER, RADCLIENT, lifetime), NULL },
{ "rate_limit", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, RADCLIENT, rate_limit), NULL },
#endif
{ NULL, -1, 0, NULL, NULL }
};
/*
* Create the linked list of clients from the new configuration
* type. This way we don't have to change too much in the other
* source-files.
*/
#ifdef WITH_TLS
RADCLIENT_LIST *client_list_parse_section(CONF_SECTION *section, bool tls_required)
#else
RADCLIENT_LIST *client_list_parse_section(CONF_SECTION *section, UNUSED bool tls_required)
#endif
{
bool global = false, in_server = false;
CONF_SECTION *cs;
RADCLIENT *c;
RADCLIENT_LIST *clients;
/*
* Be forgiving. If there's already a clients, return
* it. Otherwise create a new one.
*/
clients = cf_data_find(section, "clients");
if (clients) return clients;
clients = client_list_init(section);
if (!clients) return NULL;
if (cf_top_section(section) == section) global = true;
if (strcmp("server", cf_section_name1(section)) == 0) in_server = true;
/*
* Associate the clients structure with the section.
*/
if (cf_data_add(section, "clients", clients, NULL) < 0) {
cf_log_err_cs(section,
"Failed to associate clients with section %s",
cf_section_name1(section));
client_list_free(clients);
return NULL;
}
for (cs = cf_subsection_find_next(section, NULL, "client");
cs != NULL;
cs = cf_subsection_find_next(section, cs, "client")) {
c = client_afrom_cs(cs, cs, in_server, false);
if (!c) {
return NULL;
}
#ifdef WITH_TLS
/*
* TLS clients CANNOT use non-TLS listeners.
* non-TLS clients CANNOT use TLS listeners.
*/
if (tls_required != c->tls_required) {
cf_log_err_cs(cs, "Client does not have the same TLS configuration as the listener");
client_free(c);
client_list_free(clients);
return NULL;
}
#endif
/*
* FIXME: Add the client as data via cf_data_add,
* for migration issues.
*/
#ifdef WITH_DYNAMIC_CLIENTS
#ifdef HAVE_DIRENT_H
if (c->client_server) {
char const *value;
CONF_PAIR *cp;
DIR *dir;
struct dirent *dp;
struct stat stat_buf;
char buf2[2048];
/*
* Find the directory where individual
* client definitions are stored.
*/
cp = cf_pair_find(cs, "directory");
if (!cp) goto add_client;
value = cf_pair_value(cp);
if (!value) {
cf_log_err_cs(cs,
"The \"directory\" entry must not be empty");
client_free(c);
return NULL;
}
DEBUG("including dynamic clients in %s", value);
dir = opendir(value);
if (!dir) {
cf_log_err_cs(cs, "Error reading directory %s: %s", value, fr_syserror(errno));
client_free(c);
return NULL;
}
/*
* Read the directory, ignoring "." files.
*/
while ((dp = readdir(dir)) != NULL) {
char const *p;
RADCLIENT *dc;
if (dp->d_name[0] == '.') continue;
/*
* Check for valid characters
*/
for (p = dp->d_name; *p != '\0'; p++) {
if (isalpha((int)*p) ||
isdigit((int)*p) ||
(*p == ':') ||
(*p == '.')) continue;
break;
}
if (*p != '\0') continue;
snprintf(buf2, sizeof(buf2), "%s/%s",
value, dp->d_name);
if ((stat(buf2, &stat_buf) != 0) ||
S_ISDIR(stat_buf.st_mode)) continue;
dc = client_read(buf2, in_server, true);
if (!dc) {
cf_log_err_cs(cs,
"Failed reading client file \"%s\"", buf2);
client_free(c);
closedir(dir);
return NULL;
}
/*
* Validate, and add to the list.
*/
if (!client_add_dynamic(clients, c, dc)) {
client_free(c);
closedir(dir);
return NULL;
}
} /* loop over the directory */
closedir(dir);
}
#endif /* HAVE_DIRENT_H */
add_client:
#endif /* WITH_DYNAMIC_CLIENTS */
if (!client_add(clients, c)) {
cf_log_err_cs(cs,
"Failed to add client %s",
cf_section_name2(cs));
client_free(c);
return NULL;
}
}
/*
* Replace the global list of clients with the new one.
* The old one is still referenced from the original
* configuration, and will be freed when that is freed.
*/
if (global) {
root_clients = clients;
}
return clients;
}
#ifdef WITH_DYNAMIC_CLIENTS
/*
* We overload this structure a lot.
*/
static const CONF_PARSER dynamic_config[] = {
{ "FreeRADIUS-Client-IP-Address", FR_CONF_OFFSET(PW_TYPE_IPV4_ADDR, RADCLIENT, ipaddr), NULL },
{ "FreeRADIUS-Client-IPv6-Address", FR_CONF_OFFSET(PW_TYPE_IPV6_ADDR, RADCLIENT, ipaddr), NULL },
{ "FreeRADIUS-Client-IP-Prefix", FR_CONF_OFFSET(PW_TYPE_IPV4_PREFIX, RADCLIENT, ipaddr), NULL },
{ "FreeRADIUS-Client-IPv6-Prefix", FR_CONF_OFFSET(PW_TYPE_IPV6_PREFIX, RADCLIENT, ipaddr), NULL },
{ "FreeRADIUS-Client-Src-IP-Address", FR_CONF_OFFSET(PW_TYPE_IPV4_ADDR, RADCLIENT, src_ipaddr), NULL },
{ "FreeRADIUS-Client-Src-IPv6-Address", FR_CONF_OFFSET(PW_TYPE_IPV6_ADDR, RADCLIENT, src_ipaddr), NULL },
{ "FreeRADIUS-Client-Require-MA", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, RADCLIENT, message_authenticator), NULL },
{ "FreeRADIUS-Client-Secret", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, secret), "" },
{ "FreeRADIUS-Client-Shortname", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, shortname), "" },
{ "FreeRADIUS-Client-NAS-Type", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, nas_type), NULL },
{ "FreeRADIUS-Client-Virtual-Server", FR_CONF_OFFSET(PW_TYPE_STRING, RADCLIENT, server), NULL },
{ NULL, -1, 0, NULL, NULL }
};
/** Add a dynamic client
*
*/
bool client_add_dynamic(RADCLIENT_LIST *clients, RADCLIENT *master, RADCLIENT *c)
{
char buffer[128];
/*
* No virtual server defined. Inherit the parent's
* definition.
*/
if (master->server && !c->server) {
c->server = talloc_typed_strdup(c, master->server);
}
/*
* If the client network isn't global (not tied to a
* virtual server), then ensure that this clients server
* is the same as the enclosing networks virtual server.
*/
if (master->server && (strcmp(master->server, c->server) != 0)) {
ERROR("Cannot add client %s/%i: Virtual server %s is not the same as the virtual server for the network",
ip_ntoh(&c->ipaddr, buffer, sizeof(buffer)), c->ipaddr.prefix, c->server);
goto error;
}
if (!client_add(clients, c)) {
ERROR("Cannot add client %s/%i: Internal error",
ip_ntoh(&c->ipaddr, buffer, sizeof(buffer)), c->ipaddr.prefix);
goto error;
}
/*
* Initialize the remaining fields.
*/
c->dynamic = true;
c->lifetime = master->lifetime;
c->created = time(NULL);
c->longname = talloc_typed_strdup(c, c->shortname);
INFO("Adding client %s/%i with shared secret \"%s\"",
ip_ntoh(&c->ipaddr, buffer, sizeof(buffer)), c->ipaddr.prefix, c->secret);
return true;
error:
client_free(c);
return false;
}
/** Create a client CONF_SECTION using a mapping section to map values from a result set to client attributes
*
* If we hit a CONF_SECTION we recurse and process its CONF_PAIRS too.
*
* @note Caller should free CONF_SECTION passed in as out, on error.
* Contents of that section will be in an undefined state.
*
* @param[in,out] out Section to perform mapping on. Either the root of the client config, or a parent section
* (when this function is called recursively).
* Should be alloced with cf_section_alloc, or if there's a separate template section, the
* result of calling cf_section_dup on that section.
* @param[in] map section.
* @param[in] func to call to retrieve CONF_PAIR values. Must return a talloced buffer containing the value.
* @param[in] data to pass to func, usually a result pointer.
* @return 0 on success else -1 on error.
*/
int client_map_section(CONF_SECTION *out, CONF_SECTION const *map, client_value_cb_t func, void *data)
{
CONF_ITEM const *ci;
for (ci = cf_item_find_next(map, NULL);
ci != NULL;
ci = cf_item_find_next(map, ci)) {
CONF_PAIR const *cp;
CONF_PAIR *old;
char *value;
char const *attr;
/*
* Recursively process map subsection
*/
if (cf_item_is_section(ci)) {
CONF_SECTION *cs, *cc;
cs = cf_item_to_section(ci);
/*
* Use pre-existing section or alloc a new one
*/
cc = cf_section_sub_find_name2(out, cf_section_name1(cs), cf_section_name2(cs));
if (!cc) {
cc = cf_section_alloc(out, cf_section_name1(cs), cf_section_name2(cs));
cf_section_add(out, cc);
if (!cc) return -1;
}
if (client_map_section(cc, cs, func, data) < 0) return -1;
continue;
}
cp = cf_item_to_pair(ci);
attr = cf_pair_attr(cp);
/*
* The callback can return 0 (success) and not provide a value
* in which case we skip the mapping pair.
*
* Or return -1 in which case we error out.
*/
if (func(&value, cp, data) < 0) {
cf_log_err_cs(out, "Failed performing mapping \"%s\" = \"%s\"", attr, cf_pair_value(cp));
return -1;
}
if (!value) continue;
/*
* Replace an existing CONF_PAIR
*/
old = cf_pair_find(out, attr);
if (old) {
cf_pair_replace(out, old, value);
talloc_free(value);
continue;
}
/*
* ...or add a new CONF_PAIR
*/
cp = cf_pair_alloc(out, attr, value, T_OP_SET, T_BARE_WORD, T_SINGLE_QUOTED_STRING);
if (!cp) {
cf_log_err_cs(out, "Failed allocing pair \"%s\" = \"%s\"", attr, value);
talloc_free(value);
return -1;
}
talloc_free(value);
cf_item_add(out, cf_pair_to_item(cp));
}
return 0;
}
/** Allocate a new client from a config section
*
* @param ctx to allocate new clients in.
* @param cs to process as a client.
* @param in_server Whether the client should belong to a specific virtual server.
* @param with_coa If true and coa_server or coa_pool aren't specified automatically,
* create a coa home_server section and add it to the client CONF_SECTION.
* @return new RADCLIENT struct.
*/
RADCLIENT *client_afrom_cs(TALLOC_CTX *ctx, CONF_SECTION *cs, bool in_server, bool with_coa)
{
RADCLIENT *c;
char const *name2;
name2 = cf_section_name2(cs);
if (!name2) {
cf_log_err_cs(cs, "Missing client name");
return NULL;
}
/*
* The size is fine.. Let's create the buffer
*/
c = talloc_zero(ctx, RADCLIENT);
c->cs = cs;
memset(&cl_ipaddr, 0, sizeof(cl_ipaddr));
if (cf_section_parse(cs, c, client_config) < 0) {
cf_log_err_cs(cs, "Error parsing client section");
error:
client_free(c);
#ifdef WITH_TCP
hs_proto = NULL;
cl_srcipaddr = NULL;
#endif
return NULL;
}
/*
* Global clients can set servers to use, per-server clients cannot.
*/
if (in_server && c->server) {
cf_log_err_cs(cs, "Clients inside of an server section cannot point to a server");
goto error;
}
/*
* Newer style client definitions with either ipaddr or ipaddr6
* config items.
*/
if (cf_pair_find(cs, "ipaddr") || cf_pair_find(cs, "ipv4addr") || cf_pair_find(cs, "ipv6addr")) {
char buffer[128];
/*
* Sets ipv4/ipv6 address and prefix.
*/
c->ipaddr = cl_ipaddr;
/*
* Set the long name to be the result of a reverse lookup on the IP address.
*/
ip_ntoh(&c->ipaddr, buffer, sizeof(buffer));
c->longname = talloc_typed_strdup(c, buffer);
/*
* Set the short name to the name2.
*/
if (!c->shortname) c->shortname = talloc_typed_strdup(c, name2);
/*
* No "ipaddr" or "ipv6addr", use old-style "client <ipaddr> {" syntax.
*/
} else {
cf_log_err_cs(cs, "No 'ipaddr' or 'ipv4addr' or 'ipv6addr' configuration "
"directive found in client %s", name2);
goto error;
}
c->proto = IPPROTO_UDP;
if (hs_proto) {
if (strcmp(hs_proto, "udp") == 0) {
hs_proto = NULL;
#ifdef WITH_TCP
} else if (strcmp(hs_proto, "tcp") == 0) {
hs_proto = NULL;
c->proto = IPPROTO_TCP;
# ifdef WITH_TLS
} else if (strcmp(hs_proto, "tls") == 0) {
hs_proto = NULL;
c->proto = IPPROTO_TCP;
c->tls_required = true;
} else if (strcmp(hs_proto, "radsec") == 0) {
hs_proto = NULL;
c->proto = IPPROTO_TCP;
c->tls_required = true;
# endif
} else if (strcmp(hs_proto, "*") == 0) {
hs_proto = NULL;
c->proto = IPPROTO_IP; /* fake for dual */
#endif
} else {
cf_log_err_cs(cs, "Unknown proto \"%s\".", hs_proto);
goto error;
}
}
/*
* If a src_ipaddr is specified, when we send the return packet
* we will use this address instead of the src from the
* request.
*/
if (cl_srcipaddr) {
#ifdef WITH_UDPFROMTO
switch (c->ipaddr.af) {
case AF_INET:
if (fr_pton4(&c->src_ipaddr, cl_srcipaddr, -1, true, false) < 0) {
cf_log_err_cs(cs, "Failed parsing src_ipaddr: %s", fr_strerror());
goto error;
}
break;
case AF_INET6:
if (fr_pton6(&c->src_ipaddr, cl_srcipaddr, -1, true, false) < 0) {
cf_log_err_cs(cs, "Failed parsing src_ipaddr: %s", fr_strerror());
goto error;
}
break;
default:
rad_assert(0);
}
#else
WARN("Server not built with udpfromto, ignoring client src_ipaddr");
#endif