s3: piddir creation fix part 2.
[ira/wip.git] / source3 / winbindd / winbindd.c
index 87a8be64c919bc69a2758f08154a9bb5bf7c61d4..d1d36fd0073859c71104a6cfd775cf199678ce6f 100644 (file)
 */
 
 #include "includes.h"
+#include "popt_common.h"
 #include "winbindd.h"
-#include "../../nsswitch/libwbclient/wbc_async.h"
-#include "librpc/gen_ndr/messaging.h"
+#include "nsswitch/winbind_client.h"
+#include "nsswitch/wb_reqtrans.h"
+#include "ntdomain.h"
+#include "../librpc/gen_ndr/srv_lsa.h"
+#include "../librpc/gen_ndr/srv_samr.h"
+#include "secrets.h"
+#include "idmap.h"
+#include "lib/addrchange.h"
+#include "serverid.h"
+#include "auth.h"
+#include "messages.h"
 
 #undef DBGC_CLASS
 #define DBGC_CLASS DBGC_WINBIND
 
+static bool client_is_idle(struct winbindd_cli_state *state);
 static void remove_client(struct winbindd_cli_state *state);
 
 static bool opt_nocache = False;
@@ -37,6 +48,16 @@ static bool interactive = False;
 
 extern bool override_logfile;
 
+struct messaging_context *winbind_messaging_context(void)
+{
+       struct messaging_context *msg_ctx = server_messaging_context();
+       if (likely(msg_ctx != NULL)) {
+               return msg_ctx;
+       }
+       smb_panic("Could not init winbindd's messaging context.\n");
+       return NULL;
+}
+
 /* Reload configuration */
 
 static bool reload_services_file(const char *lfile)
@@ -58,7 +79,7 @@ static bool reload_services_file(const char *lfile)
        }
 
        reopen_logs();
-       ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
+       ret = lp_load_global(get_dyn_CONFIGFILE());
 
        reopen_logs();
        load_interfaces();
@@ -67,15 +88,6 @@ static bool reload_services_file(const char *lfile)
 }
 
 
-/**************************************************************************** **
- Handle a fault..
- **************************************************************************** */
-
-static void fault_quit(void)
-{
-       dump_core();
-}
-
 static void winbindd_status(void)
 {
        struct winbindd_cli_state *tmp;
@@ -89,19 +101,13 @@ static void winbindd_status(void)
        if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
                DEBUG(2, ("\tclient list:\n"));
                for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
-                       DEBUGADD(2, ("\t\tpid %lu, sock %d\n",
-                                 (unsigned long)tmp->pid, tmp->sock));
+                       DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
+                                    (unsigned long)tmp->pid, tmp->sock,
+                                    client_is_idle(tmp) ? "idle" : "active"));
                }
        }
 }
 
-/* Print winbindd status to log file */
-
-static void print_winbindd_status(void)
-{
-       winbindd_status();
-}
-
 /* Flush client cache */
 
 static void flush_caches(void)
@@ -176,7 +182,7 @@ static void terminate(bool is_parent)
 #endif
 
        if (is_parent) {
-               serverid_deregister_self();
+               serverid_deregister(procid_self());
                pidfile_unlink();
        }
 
@@ -197,6 +203,26 @@ static void winbindd_sig_term_handler(struct tevent_context *ev,
        terminate(*is_parent);
 }
 
+/*
+  handle stdin becoming readable when we are in --foreground mode
+ */
+static void winbindd_stdin_handler(struct tevent_context *ev,
+                              struct tevent_fd *fde,
+                              uint16_t flags,
+                              void *private_data)
+{
+       char c;
+       if (read(0, &c, 1) != 1) {
+               bool *is_parent = talloc_get_type_abort(private_data, bool);
+               
+               /* we have reached EOF on stdin, which means the
+                  parent has exited. Shutdown the server */
+               DEBUG(0,("EOF on stdin (is_parent=%d)\n",
+                        (int)*is_parent));
+               terminate(*is_parent);
+       }
+}
+
 bool winbindd_setup_sig_term_handler(bool parent)
 {
        struct tevent_signal *se;
@@ -245,6 +271,28 @@ bool winbindd_setup_sig_term_handler(bool parent)
        return true;
 }
 
+bool winbindd_setup_stdin_handler(bool parent, bool foreground)
+{
+       bool *is_parent;
+
+       if (foreground) {
+               is_parent = talloc(winbind_event_context(), bool);
+               if (!is_parent) {
+                       return false;
+               }
+               
+               *is_parent = parent;
+
+               /* if we are running in the foreground then look for
+                  EOF on stdin, and exit if it happens. This allows
+                  us to die if the parent process dies
+               */
+               tevent_add_fd(winbind_event_context(), is_parent, 0, TEVENT_FD_READ, winbindd_stdin_handler, is_parent);
+       }
+       
+       return true;
+}
+
 static void winbindd_sig_hup_handler(struct tevent_context *ev,
                                     struct tevent_signal *se,
                                     int signum,
@@ -321,7 +369,7 @@ static void winbindd_sig_usr2_handler(struct tevent_context *ev,
                                      void *siginfo,
                                      void *private_data)
 {
-       print_winbindd_status();
+       winbindd_status();
 }
 
 static bool winbindd_setup_sig_usr2_handler(void)
@@ -373,6 +421,7 @@ static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 {
        uint8 ret;
        pid_t child_pid;
+       NTSTATUS status;
 
        DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
                   "message.\n"));
@@ -399,7 +448,10 @@ static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
 
        /* child */
 
-       if (!winbindd_reinit_after_fork(NULL)) {
+       status = winbindd_reinit_after_fork(NULL, NULL);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
+                         nt_errstr(status)));
                _exit(0);
        }
 
@@ -431,6 +483,7 @@ static struct winbindd_dispatch_table {
          "INTERFACE_VERSION" },
        { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
        { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
+       { WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
        { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
        { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
          "WINBINDD_PRIV_PIPE_DIR" },
@@ -439,11 +492,6 @@ static struct winbindd_dispatch_table {
        { WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
        { WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
 
-       /* WINS functions */
-
-       { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
-       { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
-
        /* End of list */
 
        { WINBINDD_NUM_CMDS, NULL, "NONE" }
@@ -465,6 +513,8 @@ static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
          wb_ping_send, wb_ping_recv },
        { WINBINDD_LOOKUPSID, "LOOKUPSID",
          winbindd_lookupsid_send, winbindd_lookupsid_recv },
+       { WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
+         winbindd_lookupsids_send, winbindd_lookupsids_recv },
        { WINBINDD_LOOKUPNAME, "LOOKUPNAME",
          winbindd_lookupname_send, winbindd_lookupname_recv },
        { WINBINDD_SID_TO_UID, "SID_TO_UID",
@@ -475,6 +525,8 @@ static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
          winbindd_uid_to_sid_send, winbindd_uid_to_sid_recv },
        { WINBINDD_GID_TO_SID, "GID_TO_SID",
          winbindd_gid_to_sid_send, winbindd_gid_to_sid_recv },
+       { WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
+         winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
        { WINBINDD_GETPWSID, "GETPWSID",
          winbindd_getpwsid_send, winbindd_getpwsid_recv },
        { WINBINDD_GETPWNAM, "GETPWNAM",
@@ -530,6 +582,10 @@ static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
        { WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
          winbindd_pam_chng_pswd_auth_crap_send,
          winbindd_pam_chng_pswd_auth_crap_recv },
+       { WINBINDD_WINS_BYIP, "WINS_BYIP",
+         winbindd_wins_byip_send, winbindd_wins_byip_recv },
+       { WINBINDD_WINS_BYNAME, "WINS_BYNAME",
+         winbindd_wins_byname_send, winbindd_wins_byname_recv },
 
        { 0, NULL, NULL, NULL }
 };
@@ -539,12 +595,6 @@ static struct winbindd_async_dispatch_table async_priv_table[] = {
          winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
        { WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
          winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
-       { WINBINDD_SET_MAPPING, "SET_MAPPING",
-         winbindd_set_mapping_send, winbindd_set_mapping_recv },
-       { WINBINDD_REMOVE_MAPPING, "SET_MAPPING",
-         winbindd_remove_mapping_send, winbindd_remove_mapping_recv },
-       { WINBINDD_SET_HWM, "SET_HWM",
-         winbindd_set_hwm_send, winbindd_set_hwm_recv },
        { WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
          winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
        { WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
@@ -761,19 +811,21 @@ static void new_connection(int listen_sock, bool privileged)
 
        len = sizeof(sunaddr);
 
-       do {
-               sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr,
-                             &len);
-       } while (sock == -1 && errno == EINTR);
+       sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
 
-       if (sock == -1)
+       if (sock == -1) {
+               if (errno != EINTR) {
+                       DEBUG(0, ("Faild to accept socket - %s\n",
+                                 strerror(errno)));
+               }
                return;
+       }
 
        DEBUG(6,("accepted socket %d\n", sock));
 
        /* Create new connection structure */
 
-       if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
+       if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
                close(sock);
                return;
        }
@@ -865,6 +917,13 @@ static void remove_client(struct winbindd_cli_state *state)
        TALLOC_FREE(state);
 }
 
+/* Is a client idle? */
+
+static bool client_is_idle(struct winbindd_cli_state *state) {
+  return (state->response == NULL &&
+         !state->pwent_state && !state->grent_state);
+}
+
 /* Shutdown client connection which has been idle for the longest time */
 
 static bool remove_idle_client(void)
@@ -874,8 +933,7 @@ static bool remove_idle_client(void)
        int nidle = 0;
 
        for (state = winbindd_client_list(); state; state = state->next) {
-               if (state->response == NULL &&
-                   !state->pwent_state && !state->grent_state) {
+               if (client_is_idle(state)) {
                        nidle++;
                        if (!last_access || state->last_access < last_access) {
                                last_access = state->last_access;
@@ -907,17 +965,15 @@ static void winbindd_listen_fde_handler(struct tevent_context *ev,
        struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
                                          struct winbindd_listen_state);
 
-       while (winbindd_num_clients() >
-              WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
+       while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
                DEBUG(5,("winbindd: Exceeding %d client "
                         "connections, removing idle "
-                        "connection.\n",
-                        WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
+                        "connection.\n", lp_winbind_max_clients()));
                if (!remove_idle_client()) {
                        DEBUG(0,("winbindd: Exceeding %d "
                                 "client connections, no idle "
                                 "connection found\n",
-                                WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
+                                lp_winbind_max_clients()));
                        break;
                }
        }
@@ -930,12 +986,12 @@ static void winbindd_listen_fde_handler(struct tevent_context *ev,
 
 const char *get_winbind_pipe_dir(void)
 {
-       return lp_parm_const_string(-1, "winbindd", "socket dir", WINBINDD_SOCKET_DIR);
+       return lp_parm_const_string(-1, "winbindd", "socket dir", get_dyn_WINBINDD_SOCKET_DIR());
 }
 
 char *get_winbind_priv_pipe_dir(void)
 {
-       return lock_path(WINBINDD_PRIV_SOCKET_SUBDIR);
+       return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
 }
 
 static bool winbindd_setup_listeners(void)
@@ -943,6 +999,7 @@ static bool winbindd_setup_listeners(void)
        struct winbindd_listen_state *pub_state = NULL;
        struct winbindd_listen_state *priv_state = NULL;
        struct tevent_fd *fde;
+       int rc;
 
        pub_state = talloc(winbind_event_context(),
                           struct winbindd_listen_state);
@@ -956,6 +1013,10 @@ static bool winbindd_setup_listeners(void)
        if (pub_state->fd == -1) {
                goto failed;
        }
+       rc = listen(pub_state->fd, 5);
+       if (rc < 0) {
+               goto failed;
+       }
 
        fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
                            TEVENT_FD_READ, winbindd_listen_fde_handler,
@@ -978,6 +1039,10 @@ static bool winbindd_setup_listeners(void)
        if (priv_state->fd == -1) {
                goto failed;
        }
+       rc = listen(priv_state->fd, 5);
+       if (rc < 0) {
+               goto failed;
+       }
 
        fde = tevent_add_fd(winbind_event_context(), priv_state,
                            priv_state->fd, TEVENT_FD_READ,
@@ -1005,13 +1070,14 @@ bool winbindd_use_cache(void)
        return !opt_nocache;
 }
 
-void winbindd_register_handlers(void)
+void winbindd_register_handlers(bool foreground)
 {
-       struct tevent_timer *te;
        /* Setup signal handlers */
 
        if (!winbindd_setup_sig_term_handler(true))
                exit(1);
+       if (!winbindd_setup_stdin_handler(true, foreground))
+               exit(1);
        if (!winbindd_setup_sig_hup_handler(NULL))
                exit(1);
        if (!winbindd_setup_sig_chld_handler())
@@ -1031,7 +1097,10 @@ void winbindd_register_handlers(void)
 
        /* get broadcast messages */
 
-       if (!serverid_register_self(FLAG_MSG_GENERAL|FLAG_MSG_DBWRAP)) {
+       if (!serverid_register(procid_self(),
+                              FLAG_MSG_GENERAL |
+                              FLAG_MSG_WINBIND |
+                              FLAG_MSG_DBWRAP)) {
                DEBUG(1, ("Could not register myself in serverid.tdb\n"));
                exit(1);
        }
@@ -1062,6 +1131,10 @@ void winbindd_register_handlers(void)
                           MSG_WINBIND_DUMP_DOMAIN_LIST,
                           winbind_msg_dump_domain_list);
 
+       messaging_register(winbind_messaging_context(), NULL,
+                          MSG_WINBIND_IP_DROPPED,
+                          winbind_msg_ip_dropped_parent);
+
        /* Register handler for MSG_DEBUG. */
        messaging_register(winbind_messaging_context(), NULL,
                           MSG_DEBUG,
@@ -1084,13 +1157,98 @@ void winbindd_register_handlers(void)
        smb_nscd_flush_user_cache();
        smb_nscd_flush_group_cache();
 
-       te = tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
-                             rescan_trusted_domains, NULL);
-       if (te == NULL) {
-               DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
-               exit(1);
+       if (lp_allow_trusted_domains()) {
+               if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
+                             rescan_trusted_domains, NULL) == NULL) {
+                       DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
+                       exit(1);
+               }
+       }
+
+}
+
+struct winbindd_addrchanged_state {
+       struct addrchange_context *ctx;
+       struct tevent_context *ev;
+       struct messaging_context *msg_ctx;
+};
+
+static void winbindd_addr_changed(struct tevent_req *req);
+
+static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
+                                    struct tevent_context *ev,
+                                    struct messaging_context *msg_ctx)
+{
+       struct winbindd_addrchanged_state *state;
+       struct tevent_req *req;
+       NTSTATUS status;
+
+       state = talloc(mem_ctx, struct winbindd_addrchanged_state);
+       if (state == NULL) {
+               DEBUG(10, ("talloc failed\n"));
+               return;
+       }
+       state->ev = ev;
+       state->msg_ctx = msg_ctx;
+
+       status = addrchange_context_create(state, &state->ctx);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(10, ("addrchange_context_create failed: %s\n",
+                          nt_errstr(status)));
+               TALLOC_FREE(state);
+               return;
+       }
+       req = addrchange_send(state, ev, state->ctx);
+       if (req == NULL) {
+               DEBUG(0, ("addrchange_send failed\n"));
+               TALLOC_FREE(state);
+               return;
+       }
+       tevent_req_set_callback(req, winbindd_addr_changed, state);
+}
+
+static void winbindd_addr_changed(struct tevent_req *req)
+{
+       struct winbindd_addrchanged_state *state = tevent_req_callback_data(
+               req, struct winbindd_addrchanged_state);
+       enum addrchange_type type;
+       struct sockaddr_storage addr;
+       NTSTATUS status;
+
+       status = addrchange_recv(req, &type, &addr);
+       TALLOC_FREE(req);
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
+                          nt_errstr(status)));
+               TALLOC_FREE(state);
+               return;
        }
+       if (type == ADDRCHANGE_DEL) {
+               char addrstr[INET6_ADDRSTRLEN];
+               DATA_BLOB blob;
+
+               print_sockaddr(addrstr, sizeof(addrstr), &addr);
+
+               DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
+                         addrstr));
+
+               blob = data_blob_const(addrstr, strlen(addrstr)+1);
 
+               status = messaging_send(state->msg_ctx,
+                                       messaging_server_id(state->msg_ctx),
+                                       MSG_WINBIND_IP_DROPPED, &blob);
+               if (!NT_STATUS_IS_OK(status)) {
+                       DEBUG(10, ("messaging_send failed: %s - ignoring\n",
+                                  nt_errstr(status)));
+               }
+       }
+       req = addrchange_send(state, state->ev, state->ctx);
+       if (req == NULL) {
+               DEBUG(0, ("addrchange_send failed\n"));
+               TALLOC_FREE(state);
+               return;
+       }
+       tevent_req_set_callback(req, winbindd_addr_changed, state);
 }
 
 /* Main function */
@@ -1120,7 +1278,16 @@ int main(int argc, char **argv, char **envp)
        };
        poptContext pc;
        int opt;
-       TALLOC_CTX *frame = talloc_stackframe();
+       TALLOC_CTX *frame;
+       NTSTATUS status;
+
+       /*
+        * Do this before any other talloc operation
+        */
+       talloc_enable_null_tracking();
+       frame = talloc_stackframe();
+
+       setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
 
        /* glibc (?) likes to print "User defined signal 1" and exit if a
           SIGUSR[12] is received before a handler is installed */
@@ -1128,8 +1295,8 @@ int main(int argc, char **argv, char **envp)
        CatchSignal(SIGUSR1, SIG_IGN);
        CatchSignal(SIGUSR2, SIG_IGN);
 
-       fault_setup((void (*)(void *))fault_quit );
-       dump_core_setup("winbindd");
+       fault_setup();
+       dump_core_setup("winbindd", lp_logfile());
 
        load_case_tables();
 
@@ -1206,14 +1373,19 @@ int main(int argc, char **argv, char **envp)
                        SAFE_FREE(lfile);
                }
        }
-       setup_logging("winbindd", log_stdout);
+
+       if (log_stdout) {
+               setup_logging("winbindd", DEBUG_STDOUT);
+       } else {
+               setup_logging("winbindd", DEBUG_FILE);
+       }
        reopen_logs();
 
        DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
        DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
 
        if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
-               DEBUG(0, ("error opening config file\n"));
+               DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
                exit(1);
        }
 
@@ -1232,6 +1404,10 @@ int main(int argc, char **argv, char **envp)
                mkdir(lp_lockdir(), 0755);
        }
 
+       if (!directory_exist(lp_piddir())) {
+               mkdir(lp_piddir(), 0755);
+       }
+
        /* Setup names. */
 
        if (!init_names())
@@ -1277,14 +1453,28 @@ int main(int argc, char **argv, char **envp)
         * winbindd-specific resources we must free yet. JRA.
         */
 
-       if (!NT_STATUS_IS_OK(reinit_after_fork(winbind_messaging_context(),
-                                              winbind_event_context(),
-                                              false))) {
+       status = reinit_after_fork(winbind_messaging_context(),
+                                  winbind_event_context(),
+                                  false);
+       if (!NT_STATUS_IS_OK(status)) {
                DEBUG(0,("reinit_after_fork() failed\n"));
                exit(1);
        }
 
-       winbindd_register_handlers();
+       winbindd_register_handlers(!Fork);
+
+       status = init_system_info();
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(1, ("ERROR: failed to setup system user info: %s.\n",
+                         nt_errstr(status)));
+               exit(1);
+       }
+
+       rpc_lsarpc_init(NULL);
+       rpc_samr_init(NULL);
+
+       winbindd_init_addrchange(NULL, winbind_event_context(),
+                                winbind_messaging_context());
 
        /* setup listen sockets */