#
# files for auth_to_local_realm and kdc_max_tcp_connections.
#
# Note: MIT may be interested in these configuration options though they may
# want a more dynamic solution for handling maximum RPC and TCP connections
# through kdc_max_tcp_connections.
# Patch source: in-house
#
@@ -264,6 +264,7 @@ typedef unsigned char u_char;
#define KRB5_CONF_MASTER_KEY_TYPE "master_key_type"
#define KRB5_CONF_MAX_LIFE "max_life"
#define KRB5_CONF_MAX_RENEWABLE_LIFE "max_renewable_life"
+#define KRB5_CONF_MAX_TCP_CONNECTIONS "kdc_max_tcp_connections"
#define KRB5_CONF_MODULE "module"
#define KRB5_CONF_NOADDRESSES "noaddresses"
#define KRB5_CONF_NO_HOST_REFERRAL "no_host_referral"
@@ -52,6 +52,7 @@ krb5_error_code loop_setup_network(verto_ctx *ctx, void *handle,
krb5_error_code loop_setup_signals(verto_ctx *ctx, void *handle,
void (*reset)());
void loop_free(verto_ctx *ctx);
+void setup_kdc_options(krb5_int32);
/* to be supplied by the server application */
@@ -94,6 +94,10 @@
#define DEFAULT_KDC_UDP_PORTLIST "88,750"
#define DEFAULT_KDC_TCP_PORTLIST "88"
+/* control # of kdc tcp connection */
+#define DEFAULT_KDC_TCP_CONNECTIONS 45
+#define MIN_KDC_TCP_CONNECTIONS 10
+
/*
* Defaults for the KADM5 admin system.
*/
--- a/src/kdc/main.c
+++ b/src/kdc/main.c
@@ -203,7 +203,8 @@ static krb5_error_code
init_realm(kdc_realm_t *rdp, krb5_pointer aprof, char *realm, char *def_mpname,
krb5_enctype def_enctype, char *def_udp_ports, char *def_tcp_ports,
krb5_boolean def_manual, krb5_boolean def_restrict_anon,
- char **db_args, char *no_referral, char *hostbased)
+ char **db_args, char *no_referral, char *hostbased,
+ krb5_int32 def_max_tcp)
{
krb5_error_code kret;
krb5_boolean manual;
@@ -260,6 +261,8 @@ init_realm(kdc_realm_t *rdp, krb5_pointer aprof, char *realm, char *def_mpname,
kret = ENOMEM;
goto whoops;
}
+ rdp->realm_max_tcp = def_max_tcp;
+
/* Handle stash file */
hierarchy[2] = KRB5_CONF_KEY_STASH_FILE;
if (krb5_aprof_get_string(aprof, hierarchy, TRUE, &rdp->realm_stash))
@@ -621,6 +624,7 @@ initialize_realms(krb5_context kcontext, int argc, char **argv)
char *hostbased = NULL;
int db_args_size = 0;
char **db_args = NULL;
+ krb5_int32 default_max_tcp;
extern char *optarg;
@@ -633,6 +637,13 @@ initialize_realms(krb5_context kcontext, int argc, char **argv)
hierarchy[1] = KRB5_CONF_KDC_TCP_PORTS;
if (krb5_aprof_get_string(aprof, hierarchy, TRUE, &default_tcp_ports))
default_tcp_ports = 0;
+ hierarchy[1] = KRB5_CONF_MAX_TCP_CONNECTIONS;
+ if (krb5_aprof_get_int32(aprof, hierarchy, TRUE,
+ &default_max_tcp)) {
+ default_max_tcp = DEFAULT_KDC_TCP_CONNECTIONS;
+ } else if (default_max_tcp < MIN_KDC_TCP_CONNECTIONS) {
+ default_max_tcp = DEFAULT_KDC_TCP_CONNECTIONS;
+ }
hierarchy[1] = KRB5_CONF_KDC_MAX_DGRAM_REPLY_SIZE;
if (krb5_aprof_get_int32(aprof, hierarchy, TRUE, &max_dgram_reply_size))
max_dgram_reply_size = MAX_DGRAM_SIZE;
@@ -694,7 +705,8 @@ initialize_realms(krb5_context kcontext, int argc, char **argv)
menctype, default_udp_ports,
default_tcp_ports, manual,
def_restrict_anon, db_args,
- no_referral, hostbased);
+ no_referral, hostbased,
+ default_max_tcp);
if (retval) {
fprintf(stderr, _("%s: cannot initialize realm %s - "
"see log file for details\n"),
@@ -811,7 +823,7 @@ initialize_realms(krb5_context kcontext, int argc, char **argv)
retval = init_realm(rdatap, aprof, lrealm, mkey_name, menctype,
default_udp_ports, default_tcp_ports, manual,
def_restrict_anon, db_args, no_referral,
- hostbased);
+ hostbased, default_max_tcp);
if (retval) {
fprintf(stderr, _("%s: cannot initialize realm %s - see log "
"file for details\n"), argv[0], lrealm);
@@ -967,6 +979,9 @@ int main(int argc, char **argv)
return 1;
}
+ /* Guaranteed to have at least one realm, which is fed the def options */
+ setup_kdc_options(shandle.kdc_realmlist[0]->realm_max_tcp);
+
/* Handle each realm's ports */
for (i=0; i< shandle.kdc_numrealms; i++) {
char *cp = shandle.kdc_realmlist[i]->realm_ports;
@@ -66,6 +66,7 @@ typedef struct __kdc_realm_data {
*/
char *realm_ports; /* Per-realm KDC UDP port */
char *realm_tcp_ports; /* Per-realm KDC TCP port */
+ krb5_int32 realm_max_tcp; /* Maximum TCP connections allowed */
/*
* Per-realm parameters.
*/
@@ -348,6 +348,12 @@ loop_add_tcp_port(int port)
return 0;
}
+void
+setup_kdc_options(krb5_int32 max_tcp)
+{
+ max_tcp_or_rpc_data_connections = max_tcp;
+}
+
krb5_error_code
loop_add_rpc_service(int port, u_long prognum,
u_long versnum, void (*dispatchfn)())
@@ -258,6 +258,49 @@ parse_mapping_value(const char *value, char **type_out, char **residual_out)
return 0;
}
+/*
+ * Return true (1) if the princ's realm matches any of the
+ * 'auth_to_local_realm' relations in the default realm section.
+ */
+static int
+an_to_ln_realm_chk(
+ krb5_context context,
+ krb5_const_principal aname,
+ char *def_realm)
+{
+ char **values, **cpp;
+ const char *realm_names[4];
+ krb5_error_code retval;
+ unsigned int realm_length = krb5_princ_realm(context, aname)->length;
+
+ realm_names[0] = "realms";
+ realm_names[1] = def_realm;
+ realm_names[2] = "auth_to_local_realm";
+ realm_names[3] = 0;
+
+ if (context->profile == 0)
+ return (0);
+
+ retval = profile_get_values(context->profile, realm_names,
+ &values);
+ if (retval)
+ return (0);
+
+ for (cpp = values; *cpp; cpp++) {
+
+ if (((size_t) realm_length == strlen(*cpp)) &&
+ (memcmp(*cpp, krb5_princ_realm(context, aname)->data,
+ realm_length) == 0)) {
+
+ profile_free_list(values);
+ return (1); /* success */
+ }
+ }
+
+ profile_free_list(values);
+ return (0);
+}
+
/* Apply the default an2ln method, which translates name@defaultrealm or
* name/defaultrealm@defaultrealm to name. */
static krb5_error_code
@@ -274,7 +317,8 @@ an2ln_default(krb5_context context, krb5_localauth_moddata data,
if (ret)
return KRB5_LNAME_NOTRANS;
- if (!data_eq_string(aname->realm, def_realm)) {
+ if (!data_eq_string(aname->realm, def_realm) && !an_to_ln_realm_chk(context,
+ aname, def_realm)) {
ret = KRB5_LNAME_NOTRANS;
} else if (aname->length == 2) {
/* Allow a second component if it is the local realm. */