#include <freeradius-devel/ident.h>
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/modpriv.h>
#include <freeradius-devel/modcall.h>
#include <freeradius-devel/rad_assert.h>
extern int check_config;
typedef struct indexed_modcallable {
const char *server;
int comp;
int idx;
modcallable *modulelist;
} indexed_modcallable;
static rbtree_t *components = NULL;
static rbtree_t *module_tree = NULL;
static rbtree_t *instance_tree = NULL;
typedef struct section_type_value_t {
const char *section;
const char *typename;
int attr;
} section_type_value_t;
struct fr_module_hup_t {
module_instance_t *mi;
time_t when;
void *insthandle;
fr_module_hup_t *next;
};
static const section_type_value_t section_type_value[RLM_COMPONENT_COUNT] = {
{ "authenticate", "Auth-Type", PW_AUTH_TYPE },
{ "authorize", "Autz-Type", PW_AUTZ_TYPE },
{ "preacct", "Pre-Acct-Type", PW_PRE_ACCT_TYPE },
{ "accounting", "Acct-Type", PW_ACCT_TYPE },
{ "session", "Session-Type", PW_SESSION_TYPE },
{ "pre-proxy", "Pre-Proxy-Type", PW_PRE_PROXY_TYPE },
{ "post-proxy", "Post-Proxy-Type", PW_POST_PROXY_TYPE },
{ "post-auth", "Post-Auth-Type", PW_POST_AUTH_TYPE },
};
#ifdef WITHOUT_LIBLTDL
typedef struct lt_dlmodule_t {
const char *name;
void *ref;
} lt_dlmodule_t;
extern module_t rlm_pap;
extern module_t rlm_chap;
extern module_t rlm_eap;
typedef struct eap_type_t EAP_TYPE;
extern EAP_TYPE rlm_eap_md5;
static const lt_dlmodule_t lt_dlmodules[] = {
{ "rlm_pap", &rlm_pap },
{ "rlm_chap", &rlm_chap },
{ "rlm_eap", &rlm_eap },
{ "rlm_eap_md5", &rlm_eap_md5 },
{ NULL, NULL }
};
lt_dlhandle lt_dlopenext(const char *name)
{
int i;
for (i = 0; lt_dlmodules[i].name != NULL; i++) {
if (strcmp(name, lt_dlmodules[i].name) == 0) {
return lt_dlmodules[i].ref;
}
}
return NULL;
}
void *lt_dlsym(lt_dlhandle handle, UNUSED const char *symbol)
{
return handle;
}
#endif
static void indexed_modcallable_free(void *data)
{
indexed_modcallable *c = data;
modcallable_free(&c->modulelist);
free(c);
}
static int indexed_modcallable_cmp(const void *one, const void *two)
{
int rcode;
const indexed_modcallable *a = one;
const indexed_modcallable *b = two;
if (a->server && !b->server) return -1;
if (!a->server && b->server) return +1;
if (a->server && b->server) {
rcode = strcmp(a->server, b->server);
if (rcode != 0) return rcode;
}
if (a->comp < b->comp) return -1;
if (a->comp > b->comp) return +1;
return a->idx - b->idx;
}
static int module_instance_cmp(const void *one, const void *two)
{
const module_instance_t *a = one;
const module_instance_t *b = two;
return strcmp(a->name, b->name);
}
static void module_instance_free_old(CONF_SECTION *cs, module_instance_t *node,
time_t when)
{
fr_module_hup_t *mh, **last;
last = &(node->mh);
while (*last) {
mh = *last;
if ((when - mh->when) < 60) {
last = &(mh->next);
continue;
}
cf_section_parse_free(cs, mh->insthandle);
if (node->entry->module->detach) {
(node->entry->module->detach)(mh->insthandle);
}
*last = mh->next;
free(mh);
}
}
static void module_instance_free(void *data)
{
module_instance_t *this = data;
module_instance_free_old(this->cs, this, time(NULL) + 100);
if (this->entry->module->detach) {
(this->entry->module->detach)(this->insthandle);
}
#ifdef HAVE_PTHREAD_H
if (this->mutex) {
pthread_mutex_destroy(this->mutex);
free(this->mutex);
}
#endif
memset(this, 0, sizeof(*this));
free(this);
}
static int module_entry_cmp(const void *one, const void *two)
{
const module_entry_t *a = one;
const module_entry_t *b = two;
return strcmp(a->name, b->name);
}
static void module_entry_free(void *data)
{
module_entry_t *this = data;
lt_dlclose(this->handle);
memset(this, 0, sizeof(*this));
free(this);
}
int detach_modules(void)
{
rbtree_free(instance_tree);
rbtree_free(components);
rbtree_free(module_tree);
lt_dlexit();
return 0;
}
static module_entry_t *linkto_module(const char *module_name,
CONF_SECTION *cs)
{
module_entry_t myentry;
module_entry_t *node;
lt_dlhandle handle;
char module_struct[256];
char *p;
const module_t *module;
strlcpy(myentry.name, module_name, sizeof(myentry.name));
node = rbtree_finddata(module_tree, &myentry);
if (node) return node;
handle = lt_dlopenext(module_name);
if (handle == NULL) {
cf_log_err(cf_sectiontoitem(cs),
"Failed to link to module '%s': %s\n",
module_name, lt_dlerror());
return NULL;
}
strcpy(module_struct, module_name);
p = strrchr(module_struct, '-');
if (p) *p = '\0';
DEBUG3(" (Loaded %s, checking if it's valid)", module_name);
module = lt_dlsym(handle, module_struct);
if (!module) {
cf_log_err(cf_sectiontoitem(cs),
"Failed linking to %s structure: %s\n",
module_name, lt_dlerror());
lt_dlclose(handle);
return NULL;
}
if (module->magic != RLM_MODULE_MAGIC_NUMBER) {
lt_dlclose(handle);
cf_log_err(cf_sectiontoitem(cs),
"Invalid version in module '%s'",
module_name);
return NULL;
}
node = rad_malloc(sizeof(*node));
memset(node, 0, sizeof(*node));
strlcpy(node->name, module_name, sizeof(node->name));
node->module = module;
node->handle = handle;
cf_log_module(cs, "Linked to module %s", module_name);
if (!rbtree_insert(module_tree, node)) {
radlog(L_ERR, "Failed to cache module %s", module_name);
lt_dlclose(handle);
free(node);
return NULL;
}
return node;
}
module_instance_t *find_module_instance(CONF_SECTION *modules,
const char *instname, int do_link)
{
CONF_SECTION *cs;
const char *name1, *name2;
module_instance_t *node, myNode;
char module_name[256];
if (!modules) return NULL;
cs = cf_section_sub_find_name2(modules, NULL, instname);
if (cs == NULL) {
radlog(L_ERR, "ERROR: Cannot find a configuration entry for module \"%s\".\n", instname);
return NULL;
}
strlcpy(myNode.name, instname, sizeof(myNode.name));
node = rbtree_finddata(instance_tree, &myNode);
if (node) return node;
if (!do_link) return NULL;
name1 = cf_section_name1(cs);
name2 = cf_section_name2(cs);
node = rad_malloc(sizeof(*node));
memset(node, 0, sizeof(*node));
node->insthandle = NULL;
node->cs = cs;
snprintf(module_name, sizeof(module_name), "rlm_%s", name1);
node->entry = linkto_module(module_name, cs);
if (!node->entry) {
free(node);
return NULL;
}
if (check_config && (node->entry->module->instantiate) &&
(node->entry->module->type & RLM_TYPE_CHECK_CONFIG_SAFE) == 0) {
cf_log_module(cs, "Skipping instantiation of %s", instname);
} else {
cf_log_module(cs, "Instantiating %s", instname);
}
if ((node->entry->module->instantiate) &&
(!check_config ||
((node->entry->module->type & RLM_TYPE_CHECK_CONFIG_SAFE) != 0)) &&
((node->entry->module->instantiate)(cs, &node->insthandle) < 0)) {
cf_log_err(cf_sectiontoitem(cs),
"Instantiation failed for module \"%s\"",
instname);
free(node);
return NULL;
}
strlcpy(node->name, instname, sizeof(node->name));
#ifdef HAVE_PTHREAD_H
if ((node->entry->module->type & RLM_TYPE_THREAD_UNSAFE) != 0) {
node->mutex = (pthread_mutex_t *) rad_malloc(sizeof(pthread_mutex_t));
pthread_mutex_init(node->mutex, NULL);
} else {
node->mutex = NULL;
}
#endif
rbtree_insert(instance_tree, node);
return node;
}
static indexed_modcallable *lookup_by_index(const char *server, int comp,
int idx)
{
indexed_modcallable myc;
myc.comp = comp;
myc.idx = idx;
myc.server = server;
return rbtree_finddata(components, &myc);
}
static indexed_modcallable *new_sublist(const char *server, int comp, int idx)
{
indexed_modcallable *c;
c = lookup_by_index(server, comp, idx);
if (c) {
if (idx == 0) {
return c;
}
return NULL;
}
c = rad_malloc(sizeof(*c));
c->modulelist = NULL;
c->server = server;
c->comp = comp;
c->idx = idx;
if (!rbtree_insert(components, c)) {
free(c);
return NULL;
}
return c;
}
int indexed_modcall(int comp, int idx, REQUEST *request)
{
int rcode;
indexed_modcallable *this;
modcallable *list = NULL;
this = lookup_by_index(request->server, comp, idx);
if (!this) {
if (idx != 0) DEBUG2(" WARNING: Unknown value specified for %s. Cannot perform requested action.",
section_type_value[comp].typename);
} else {
list = this->modulelist;
}
request->component = section_type_value[comp].section;
rcode = modcall(comp, list, request);
request->module = "";
request->component = "";
return rcode;
}
static int load_subcomponent_section(modcallable *parent, CONF_SECTION *cs,
const char *server, int attr, int comp)
{
indexed_modcallable *subcomp;
modcallable *ml;
DICT_VALUE *dval;
const char *name2 = cf_section_name2(cs);
rad_assert(comp >= RLM_COMPONENT_AUTH);
rad_assert(comp < RLM_COMPONENT_COUNT);
if (!name2) {
cf_log_err(cf_sectiontoitem(cs),
"No name specified for %s block",
section_type_value[comp].typename);
return 1;
}
ml = compile_modgroup(parent, comp, cs);
if (!ml) {
return 0;
}
dval = dict_valbyname(attr, name2);
if (!dval) {
cf_log_err(cf_sectiontoitem(cs),
"%s %s Not previously configured",
section_type_value[comp].typename, name2);
modcallable_free(&ml);
return 0;
}
subcomp = new_sublist(server, comp, dval->value);
if (!subcomp) {
modcallable_free(&ml);
return 1;
}
subcomp->modulelist = ml;
return 1;
}
static int define_type(const DICT_ATTR *dattr, const char *name)
{
uint32_t value;
DICT_VALUE *dval;
dval = dict_valbyname(dattr->attr, name);
if (dval) return 1;
do {
value = fr_rand() & 0x00ffffff;
} while (dict_valbyattr(dattr->attr, value));
if (dict_addvalue(name, dattr->name, value) < 0) {
radlog(L_ERR, "%s", fr_strerror());
return 0;
}
return 1;
}
static int load_component_section(CONF_SECTION *cs,
const char *server, int comp)
{
modcallable *this;
CONF_ITEM *modref;
int idx;
indexed_modcallable *subcomp;
const char *modname;
const char *visiblename;
const DICT_ATTR *dattr;
dattr = dict_attrbyvalue(section_type_value[comp].attr);
if (!dattr) {
cf_log_err(cf_sectiontoitem(cs),
"No such attribute %s",
section_type_value[comp].typename);
return -1;
}
for (modref = cf_item_find_next(cs, NULL);
modref != NULL;
modref = cf_item_find_next(cs, modref)) {
const char *name1;
CONF_PAIR *cp = NULL;
CONF_SECTION *scs = NULL;
if (cf_item_is_section(modref)) {
scs = cf_itemtosection(modref);
name1 = cf_section_name1(scs);
if (strcmp(name1,
section_type_value[comp].typename) == 0) {
if (!load_subcomponent_section(NULL, scs,
server,
dattr->attr,
comp)) {
return -1;
}
continue;
}
cp = NULL;
} else if (cf_item_is_pair(modref)) {
cp = cf_itemtopair(modref);
} else {
continue;
}
this = compile_modsingle(NULL, comp, modref, &modname);
if (!this) {
cf_log_err(cf_sectiontoitem(cs),
"Errors parsing %s section.\n",
cf_section_name1(cs));
return -1;
}
if (comp == RLM_COMPONENT_AUTH) {
DICT_VALUE *dval;
const char *modrefname = NULL;
if (cp) {
modrefname = cf_pair_attr(cp);
} else {
modrefname = cf_section_name2(scs);
if (!modrefname) {
modcallable_free(&this);
cf_log_err(cf_sectiontoitem(cs),
"Errors parsing %s sub-section.\n",
cf_section_name1(scs));
return -1;
}
}
dval = dict_valbyname(PW_AUTH_TYPE, modrefname);
if (!dval) {
modcallable_free(&this);
cf_log_err(cf_sectiontoitem(cs),
"Unknown Auth-Type \"%s\" in %s sub-section.",
modrefname, section_type_value[comp].section);
return -1;
}
idx = dval->value;
} else {
idx = 0;
}
subcomp = new_sublist(server, comp, idx);
if (subcomp == NULL) {
modcallable_free(&this);
continue;
}
visiblename = cf_section_name2(cs);
if (visiblename == NULL)
visiblename = cf_section_name1(cs);
add_to_modcallable(&subcomp->modulelist, this,
comp, visiblename);
}
return 0;
}
static int load_byserver(CONF_SECTION *cs)
{
int comp, flag;
const char *server = cf_section_name2(cs);
cf_log_info(cs, " modules {");
for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
CONF_SECTION *subcs;
CONF_ITEM *modref;
DICT_ATTR *dattr;
subcs = cf_section_sub_find(cs,
section_type_value[comp].section);
if (!subcs) continue;
if (cf_item_find_next(subcs, NULL) == NULL) continue;
dattr = dict_attrbyvalue(section_type_value[comp].attr);
if (!dattr) {
cf_log_err(cf_sectiontoitem(subcs),
"No such attribute %s",
section_type_value[comp].typename);
cf_log_info(cs, " }");
return -1;
}
for (modref = cf_item_find_next(subcs, NULL);
modref != NULL;
modref = cf_item_find_next(subcs, modref)) {
const char *name1;
CONF_SECTION *subsubcs;
if ((section_type_value[comp].attr == PW_AUTH_TYPE) &&
cf_item_is_pair(modref)) {
CONF_PAIR *cp = cf_itemtopair(modref);
if (!define_type(dattr, cf_pair_attr(cp))) {
return -1;
}
continue;
}
if (!cf_item_is_section(modref)) continue;
subsubcs = cf_itemtosection(modref);
name1 = cf_section_name1(subsubcs);
if (strcmp(name1, section_type_value[comp].typename) == 0) {
if (!define_type(dattr,
cf_section_name2(subsubcs))) {
cf_log_info(cs, " }");
return -1;
}
}
}
}
flag = 0;
for (comp = 0; comp < RLM_COMPONENT_COUNT; ++comp) {
CONF_SECTION *subcs;
subcs = cf_section_sub_find(cs,
section_type_value[comp].section);
if (!subcs) continue;
if (cf_item_find_next(subcs, NULL) == NULL) continue;
cf_log_module(cs, "Checking %s {...} for more modules to load",
section_type_value[comp].section);
if (load_component_section(subcs, server, comp) < 0) {
cf_log_info(cs, " }");
return -1;
}
flag = 1;
}
if (!flag) {
CONF_SECTION *subcs;
subcs = cf_section_sub_find(cs, "vmps");
if (subcs) {
cf_log_module(cs, "Checking vmps {...} for more modules to load");
if (load_component_section(subcs, server,
RLM_COMPONENT_POST_AUTH) < 0) {
return -1;
}
flag = 1;
}
#ifdef WITH_DHCP
if (!flag) {
const DICT_ATTR *dattr;
dattr = dict_attrbyname("DHCP-Message-Type");
if (!dattr) {
radlog(L_ERR, "No DHCP-Message-Type attribute");
return -1;
}
for (subcs = cf_subsection_find_next(cs, NULL,
"dhcp");
subcs != NULL;
subcs = cf_subsection_find_next(cs, subcs,
"dhcp")) {
const char *name2 = cf_section_name2(subcs);
DEBUG2(" Module: Checking dhcp %s {...} for more modules to load", name2);
if (!load_subcomponent_section(NULL, subcs,
server,
dattr->attr,
RLM_COMPONENT_POST_AUTH)) {
return -1;
}
flag = 1;
}
}
#endif
}
cf_log_info(cs, " }");
if (!flag && server) {
DEBUG("WARNING: Server %s is empty, and will do nothing!",
server);
}
return 0;
}
int module_hup_module(CONF_SECTION *cs, module_instance_t *node, time_t when)
{
void *insthandle = NULL;
fr_module_hup_t *mh;
if (!node ||
!node->entry->module->instantiate ||
((node->entry->module->type & RLM_TYPE_HUP_SAFE) == 0)) {
return 1;
}
cf_log_module(cs, "Trying to reload module \"%s\"", node->name);
if ((node->entry->module->instantiate)(cs, &insthandle) < 0) {
cf_log_err(cf_sectiontoitem(cs),
"HUP failed for module \"%s\". Using old configuration.",
node->name);
return 0;
}
radlog(L_INFO, " Module: Reloaded module \"%s\"", node->name);
module_instance_free_old(cs, node, when);
mh = rad_malloc(sizeof(*mh));
mh->mi = node;
mh->when = when;
mh->insthandle = node->insthandle;
mh->next = node->mh;
node->mh = mh;
node->insthandle = insthandle;
return 1;
}
int module_hup(CONF_SECTION *modules)
{
time_t when;
CONF_ITEM *ci;
CONF_SECTION *cs;
module_instance_t *node;
if (!modules) return 0;
when = time(NULL);
for (ci=cf_item_find_next(modules, NULL);
ci != NULL;
ci=cf_item_find_next(modules, ci)) {
const char *instname;
module_instance_t myNode;
if (!cf_item_is_section(ci)) continue;
cs = cf_itemtosection(ci);
instname = cf_section_name2(cs);
if (!instname) instname = cf_section_name1(cs);
strlcpy(myNode.name, instname, sizeof(myNode.name));
node = rbtree_finddata(instance_tree, &myNode);
module_hup_module(cs, node, when);
}
return 1;
}
int setup_modules(int reload, CONF_SECTION *config)
{
CONF_SECTION *cs, *modules;
rad_listen_t *listener;
int null_server = FALSE;
if (reload) return 0;
if (!reload) {
LTDL_SET_PRELOADED_SYMBOLS();
if (lt_dlinit() != 0) {
radlog(L_ERR, "Failed to initialize libraries: %s\n",
lt_dlerror());
return -1;
}
lt_dlsetsearchpath(radlib_dir);
module_tree = rbtree_create(module_entry_cmp,
module_entry_free, 0);
if (!module_tree) {
radlog(L_ERR, "Failed to initialize modules\n");
return -1;
}
instance_tree = rbtree_create(module_instance_cmp,
module_instance_free, 0);
if (!instance_tree) {
radlog(L_ERR, "Failed to initialize modules\n");
return -1;
}
}
components = rbtree_create(indexed_modcallable_cmp,
indexed_modcallable_free, 0);
if (!components) {
radlog(L_ERR, "Failed to initialize components\n");
return -1;
}
modules = cf_section_sub_find(config, "modules");
if (!modules) {
radlog(L_ERR, "Cannot find a \"modules\" section in the configuration file!");
return -1;
}
DEBUG2("%s: #### Instantiating modules ####", mainconfig.name);
cs = cf_section_sub_find(config, "instantiate");
if (cs != NULL) {
CONF_ITEM *ci;
CONF_PAIR *cp;
module_instance_t *module;
const char *name;
cf_log_info(cs, " instantiate {");
for (ci=cf_item_find_next(cs, NULL);
ci != NULL;
ci=cf_item_find_next(cs, ci)) {
if (!cf_item_is_pair(ci)) {
continue;
}
cp = cf_itemtopair(ci);
name = cf_pair_attr(cp);
module = find_module_instance(modules, name, 1);
if (!module) {
return -1;
}
}
cf_log_info(cs, " }");
}
for (listener = mainconfig.listen;
listener != NULL;
listener = listener->next) {
char buffer[256];
if (listener->type == RAD_LISTEN_PROXY) continue;
cs = cf_section_sub_find_name2(config,
"server", listener->server);
if (!cs && (listener->server != NULL)) {
listener->print(listener, buffer, sizeof(buffer));
radlog(L_ERR, "No server has been defined for %s", buffer);
return -1;
}
}
DEBUG2("%s: #### Loading Virtual Servers ####", mainconfig.name);
for (cs = cf_subsection_find_next(config, NULL, "server");
cs != NULL;
cs = cf_subsection_find_next(config, cs, "server")) {
const char *name2 = cf_section_name2(cs);
if (name2) {
cf_log_info(cs, "server %s {", name2);
} else {
cf_log_info(cs, "server {");
null_server = TRUE;
}
if (load_byserver(cs) < 0) {
cf_log_info(cs, "}");
return -1;
}
cf_log_info(cs, "}");
}
if (!null_server) {
cf_log_info(cs, "server {");
if (load_byserver(config) < 0) {
cf_log_info(cs, "}");
return -1;
}
cf_log_info(cs, "}");
}
return 0;
}
int module_authorize(int autz_type, REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_AUTZ, autz_type, request);
}
int module_authenticate(int auth_type, REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_AUTH, auth_type, request);
}
#ifdef WITH_ACCOUNTING
int module_preacct(REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_PREACCT, 0, request);
}
int module_accounting(int acct_type, REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_ACCT, acct_type, request);
}
#endif
#ifdef WITH_SESSION_MGMT
int module_checksimul(int sess_type, REQUEST *request, int maxsimul)
{
int rcode;
if(!request->username)
return 0;
request->simul_count = 0;
request->simul_max = maxsimul;
request->simul_mpp = 1;
rcode = indexed_modcall(RLM_COMPONENT_SESS, sess_type, request);
if (rcode != RLM_MODULE_OK) {
return 0;
}
return (request->simul_count < maxsimul) ? 0 : request->simul_mpp;
}
#endif
#ifdef WITH_PROXY
int module_pre_proxy(int type, REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_PRE_PROXY, type, request);
}
int module_post_proxy(int type, REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_POST_PROXY, type, request);
}
#endif
int module_post_auth(int postauth_type, REQUEST *request)
{
return indexed_modcall(RLM_COMPONENT_POST_AUTH, postauth_type, request);
}