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|
/*
Unix SMB/CIFS implementation.
Winbind child daemons
Copyright (C) Andrew Tridgell 2002
Copyright (C) Volker Lendecke 2004,2005
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* We fork a child per domain to be able to act non-blocking in the main
* winbind daemon. A domain controller thousands of miles away being being
* slow replying with a 10.000 user list should not hold up netlogon calls
* that can be handled locally.
*/
#include "includes.h"
#include "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
extern BOOL override_logfile;
/* Read some data from a client connection */
static void child_read_request(struct winbindd_cli_state *state)
{
ssize_t len;
/* Read data */
len = read_data(state->sock, (char *)&state->request,
sizeof(state->request));
if (len != sizeof(state->request)) {
DEBUG(len > 0 ? 0 : 3, ("Got invalid request length: %d\n", (int)len));
state->finished = True;
return;
}
if (state->request.extra_len == 0) {
state->request.extra_data.data = NULL;
return;
}
DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request.extra_len));
state->request.extra_data.data =
SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
if (state->request.extra_data.data == NULL) {
DEBUG(0, ("malloc failed\n"));
state->finished = True;
return;
}
/* Ensure null termination */
state->request.extra_data.data[state->request.extra_len] = '\0';
len = read_data(state->sock, state->request.extra_data.data,
state->request.extra_len);
if (len != state->request.extra_len) {
DEBUG(0, ("Could not read extra data\n"));
state->finished = True;
return;
}
}
/*
* Machinery for async requests sent to children. You set up a
* winbindd_request, select a child to query, and issue a async_request
* call. When the request is completed, the callback function you specified is
* called back with the private pointer you gave to async_request.
*/
struct winbindd_async_request {
struct winbindd_async_request *next, *prev;
TALLOC_CTX *mem_ctx;
struct winbindd_child *child;
struct winbindd_request *request;
struct winbindd_response *response;
void (*continuation)(void *private_data, BOOL success);
void *private_data;
};
static void async_main_request_sent(void *private_data, BOOL success);
static void async_request_sent(void *private_data, BOOL success);
static void async_reply_recv(void *private_data, BOOL success);
static void schedule_async_request(struct winbindd_child *child);
void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
struct winbindd_request *request,
struct winbindd_response *response,
void (*continuation)(void *private_data, BOOL success),
void *private_data)
{
struct winbindd_async_request *state;
SMB_ASSERT(continuation != NULL);
state = TALLOC_P(mem_ctx, struct winbindd_async_request);
if (state == NULL) {
DEBUG(0, ("talloc failed\n"));
continuation(private_data, False);
return;
}
state->mem_ctx = mem_ctx;
state->child = child;
state->request = request;
state->response = response;
state->continuation = continuation;
state->private_data = private_data;
DLIST_ADD_END(child->requests, state, struct winbindd_async_request *);
schedule_async_request(child);
return;
}
static void async_main_request_sent(void *private_data, BOOL success)
{
struct winbindd_async_request *state =
talloc_get_type_abort(private_data, struct winbindd_async_request);
if (!success) {
DEBUG(5, ("Could not send async request\n"));
state->response->length = sizeof(struct winbindd_response);
state->response->result = WINBINDD_ERROR;
state->continuation(state->private_data, False);
return;
}
if (state->request->extra_len == 0) {
async_request_sent(private_data, True);
return;
}
setup_async_write(&state->child->event, state->request->extra_data.data,
state->request->extra_len,
async_request_sent, state);
}
static void async_request_sent(void *private_data_data, BOOL success)
{
struct winbindd_async_request *state =
talloc_get_type_abort(private_data_data, struct winbindd_async_request);
if (!success) {
DEBUG(5, ("Could not send async request\n"));
state->response->length = sizeof(struct winbindd_response);
state->response->result = WINBINDD_ERROR;
state->continuation(state->private_data, False);
return;
}
/* Request successfully sent to the child, setup the wait for reply */
setup_async_read(&state->child->event,
&state->response->result,
sizeof(state->response->result),
async_reply_recv, state);
}
static void async_reply_recv(void *private_data, BOOL success)
{
struct winbindd_async_request *state =
talloc_get_type_abort(private_data, struct winbindd_async_request);
struct winbindd_child *child = state->child;
state->response->length = sizeof(struct winbindd_response);
if (!success) {
DEBUG(5, ("Could not receive async reply\n"));
cache_cleanup_response(child->pid);
DLIST_REMOVE(child->requests, state);
state->response->result = WINBINDD_ERROR;
state->continuation(state->private_data, False);
return;
}
SMB_ASSERT(cache_retrieve_response(child->pid,
state->response));
cache_cleanup_response(child->pid);
DLIST_REMOVE(child->requests, state);
schedule_async_request(child);
state->continuation(state->private_data, True);
}
static BOOL fork_domain_child(struct winbindd_child *child);
static void schedule_async_request(struct winbindd_child *child)
{
struct winbindd_async_request *request = child->requests;
if (request == NULL) {
return;
}
if (child->event.flags != 0) {
return; /* Busy */
}
if ((child->pid == 0) && (!fork_domain_child(child))) {
/* Cancel all outstanding requests */
while (request != NULL) {
/* request might be free'd in the continuation */
struct winbindd_async_request *next = request->next;
request->continuation(request->private_data, False);
request = next;
}
return;
}
setup_async_write(&child->event, request->request,
sizeof(*request->request),
async_main_request_sent, request);
return;
}
struct domain_request_state {
TALLOC_CTX *mem_ctx;
struct winbindd_domain *domain;
struct winbindd_request *request;
struct winbindd_response *response;
void (*continuation)(void *private_data_data, BOOL success);
void *private_data_data;
};
static void domain_init_recv(void *private_data_data, BOOL success);
void async_domain_request(TALLOC_CTX *mem_ctx,
struct winbindd_domain *domain,
struct winbindd_request *request,
struct winbindd_response *response,
void (*continuation)(void *private_data_data, BOOL success),
void *private_data_data)
{
struct domain_request_state *state;
if (domain->initialized) {
async_request(mem_ctx, &domain->child, request, response,
continuation, private_data_data);
return;
}
state = TALLOC_P(mem_ctx, struct domain_request_state);
if (state == NULL) {
DEBUG(0, ("talloc failed\n"));
continuation(private_data_data, False);
return;
}
state->mem_ctx = mem_ctx;
state->domain = domain;
state->request = request;
state->response = response;
state->continuation = continuation;
state->private_data_data = private_data_data;
init_child_connection(domain, domain_init_recv, state);
}
static void recvfrom_child(void *private_data_data, BOOL success)
{
struct winbindd_cli_state *state =
talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
enum winbindd_result result = state->response.result;
/* This is an optimization: The child has written directly to the
* response buffer. The request itself is still in pending state,
* state that in the result code. */
state->response.result = WINBINDD_PENDING;
if ((!success) || (result != WINBINDD_OK)) {
request_error(state);
return;
}
request_ok(state);
}
void sendto_child(struct winbindd_cli_state *state,
struct winbindd_child *child)
{
async_request(state->mem_ctx, child, &state->request,
&state->response, recvfrom_child, state);
}
void sendto_domain(struct winbindd_cli_state *state,
struct winbindd_domain *domain)
{
async_domain_request(state->mem_ctx, domain,
&state->request, &state->response,
recvfrom_child, state);
}
static void domain_init_recv(void *private_data_data, BOOL success)
{
struct domain_request_state *state =
talloc_get_type_abort(private_data_data, struct domain_request_state);
if (!success) {
DEBUG(5, ("Domain init returned an error\n"));
state->continuation(state->private_data_data, False);
return;
}
async_request(state->mem_ctx, &state->domain->child,
state->request, state->response,
state->continuation, state->private_data_data);
}
struct winbindd_child_dispatch_table {
enum winbindd_cmd cmd;
enum winbindd_result (*fn)(struct winbindd_domain *domain,
struct winbindd_cli_state *state);
const char *winbindd_cmd_name;
};
static struct winbindd_child_dispatch_table child_dispatch_table[] = {
{ WINBINDD_LOOKUPSID, winbindd_dual_lookupsid, "LOOKUPSID" },
{ WINBINDD_LOOKUPNAME, winbindd_dual_lookupname, "LOOKUPNAME" },
{ WINBINDD_LOOKUPRIDS, winbindd_dual_lookuprids, "LOOKUPRIDS" },
{ WINBINDD_LIST_TRUSTDOM, winbindd_dual_list_trusted_domains, "LIST_TRUSTDOM" },
{ WINBINDD_INIT_CONNECTION, winbindd_dual_init_connection, "INIT_CONNECTION" },
{ WINBINDD_GETDCNAME, winbindd_dual_getdcname, "GETDCNAME" },
{ WINBINDD_SHOW_SEQUENCE, winbindd_dual_show_sequence, "SHOW_SEQUENCE" },
{ WINBINDD_PAM_AUTH, winbindd_dual_pam_auth, "PAM_AUTH" },
{ WINBINDD_PAM_AUTH_CRAP, winbindd_dual_pam_auth_crap, "AUTH_CRAP" },
{ WINBINDD_PAM_LOGOFF, winbindd_dual_pam_logoff, "PAM_LOGOFF" },
{ WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP,winbindd_dual_pam_chng_pswd_auth_crap,"CHNG_PSWD_AUTH_CRAP" },
{ WINBINDD_PAM_CHAUTHTOK, winbindd_dual_pam_chauthtok, "PAM_CHAUTHTOK" },
{ WINBINDD_CHECK_MACHACC, winbindd_dual_check_machine_acct, "CHECK_MACHACC" },
{ WINBINDD_DUAL_SID2UID, winbindd_dual_sid2uid, "DUAL_SID2UID" },
{ WINBINDD_DUAL_SID2GID, winbindd_dual_sid2gid, "DUAL_SID2GID" },
#if 0 /* DISABLED until we fix the interface in Samba 3.0.26 --jerry */
{ WINBINDD_DUAL_SIDS2XIDS, winbindd_dual_sids2xids, "DUAL_SIDS2XIDS" },
#endif /* end DISABLED */
{ WINBINDD_DUAL_UID2SID, winbindd_dual_uid2sid, "DUAL_UID2SID" },
{ WINBINDD_DUAL_GID2SID, winbindd_dual_gid2sid, "DUAL_GID2SID" },
{ WINBINDD_DUAL_UID2NAME, winbindd_dual_uid2name, "DUAL_UID2NAME" },
{ WINBINDD_DUAL_NAME2UID, winbindd_dual_name2uid, "DUAL_NAME2UID" },
{ WINBINDD_DUAL_GID2NAME, winbindd_dual_gid2name, "DUAL_GID2NAME" },
{ WINBINDD_DUAL_NAME2GID, winbindd_dual_name2gid, "DUAL_NAME2GID" },
{ WINBINDD_DUAL_SET_MAPPING, winbindd_dual_set_mapping, "DUAL_SET_MAPPING" },
{ WINBINDD_DUAL_SET_HWM, winbindd_dual_set_hwm, "DUAL_SET_HWMS" },
{ WINBINDD_DUAL_DUMP_MAPS, winbindd_dual_dump_maps, "DUAL_DUMP_MAPS" },
{ WINBINDD_DUAL_USERINFO, winbindd_dual_userinfo, "DUAL_USERINFO" },
{ WINBINDD_ALLOCATE_UID, winbindd_dual_allocate_uid, "ALLOCATE_UID" },
{ WINBINDD_ALLOCATE_GID, winbindd_dual_allocate_gid, "ALLOCATE_GID" },
{ WINBINDD_GETUSERDOMGROUPS, winbindd_dual_getuserdomgroups, "GETUSERDOMGROUPS" },
{ WINBINDD_DUAL_GETSIDALIASES, winbindd_dual_getsidaliases, "GETSIDALIASES" },
{ WINBINDD_CCACHE_NTLMAUTH, winbindd_dual_ccache_ntlm_auth, "CCACHE_NTLM_AUTH" },
/* End of list */
{ WINBINDD_NUM_CMDS, NULL, "NONE" }
};
static void child_process_request(struct winbindd_domain *domain,
struct winbindd_cli_state *state)
{
struct winbindd_child_dispatch_table *table;
/* Free response data - we may be interrupted and receive another
command before being able to send this data off. */
state->response.result = WINBINDD_ERROR;
state->response.length = sizeof(struct winbindd_response);
state->mem_ctx = talloc_init("winbind request");
if (state->mem_ctx == NULL)
return;
/* Process command */
for (table = child_dispatch_table; table->fn; table++) {
if (state->request.cmd == table->cmd) {
DEBUG(10,("process_request: request fn %s\n",
table->winbindd_cmd_name ));
state->response.result = table->fn(domain, state);
break;
}
}
if (!table->fn) {
DEBUG(10,("process_request: unknown request fn number %d\n",
(int)state->request.cmd ));
state->response.result = WINBINDD_ERROR;
}
talloc_destroy(state->mem_ctx);
}
void setup_domain_child(struct winbindd_domain *domain,
struct winbindd_child *child,
const char *explicit_logfile)
{
if (explicit_logfile != NULL) {
pstr_sprintf(child->logfilename, "%s/log.winbindd-%s",
dyn_LOGFILEBASE, explicit_logfile);
} else if (domain != NULL) {
pstr_sprintf(child->logfilename, "%s/log.wb-%s",
dyn_LOGFILEBASE, domain->name);
} else {
smb_panic("Internal error: domain == NULL && "
"explicit_logfile == NULL");
}
child->domain = domain;
}
struct winbindd_child *children = NULL;
void winbind_child_died(pid_t pid)
{
struct winbindd_child *child;
for (child = children; child != NULL; child = child->next) {
if (child->pid == pid) {
break;
}
}
if (child == NULL) {
DEBUG(0, ("Unknown child %d died!\n", pid));
return;
}
remove_fd_event(&child->event);
close(child->event.fd);
child->event.fd = 0;
child->event.flags = 0;
child->pid = 0;
schedule_async_request(child);
}
/* Ensure any negative cache entries with the netbios or realm names are removed. */
void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
{
flush_negative_conn_cache_for_domain(domain->name);
if (*domain->alt_name) {
flush_negative_conn_cache_for_domain(domain->alt_name);
}
}
/* Set our domains as offline and forward the offline message to our children. */
void winbind_msg_offline(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
struct winbindd_child *child;
struct winbindd_domain *domain;
DEBUG(10,("winbind_msg_offline: got offline message.\n"));
if (!lp_winbind_offline_logon()) {
DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
return;
}
/* Set our global state as offline. */
if (!set_global_winbindd_state_offline()) {
DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
return;
}
/* Set all our domains as offline. */
for (domain = domain_list(); domain; domain = domain->next) {
if (domain->internal) {
continue;
}
DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
set_domain_offline(domain);
}
for (child = children; child != NULL; child = child->next) {
/* Don't send message to idmap child. We've already
done so above. */
if (!child->domain || (child == idmap_child())) {
continue;
}
/* Or internal domains (this should not be possible....) */
if (child->domain->internal) {
continue;
}
/* Each winbindd child should only process requests for one domain - make sure
we only set it online / offline for that domain. */
DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
(unsigned int)child->pid, domain->name ));
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
MSG_WINBIND_OFFLINE,
(uint8 *)child->domain->name,
strlen(child->domain->name)+1);
}
}
/* Set our domains as online and forward the online message to our children. */
void winbind_msg_online(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
struct winbindd_child *child;
struct winbindd_domain *domain;
DEBUG(10,("winbind_msg_online: got online message.\n"));
if (!lp_winbind_offline_logon()) {
DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
return;
}
/* Set our global state as online. */
set_global_winbindd_state_online();
smb_nscd_flush_user_cache();
smb_nscd_flush_group_cache();
/* Set all our domains as online. */
for (domain = domain_list(); domain; domain = domain->next) {
if (domain->internal) {
continue;
}
DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
winbindd_flush_negative_conn_cache(domain);
set_domain_online_request(domain);
/* Send an online message to the idmap child when our
primary domain comes back online */
if ( domain->primary ) {
struct winbindd_child *idmap = idmap_child();
if ( idmap->pid != 0 ) {
messaging_send_buf(msg_ctx,
pid_to_procid(idmap->pid),
MSG_WINBIND_ONLINE,
(uint8 *)domain->name,
strlen(domain->name)+1);
}
}
}
for (child = children; child != NULL; child = child->next) {
/* Don't send message to idmap child. */
if (!child->domain || (child == idmap_child())) {
continue;
}
/* Or internal domains (this should not be possible....) */
if (child->domain->internal) {
continue;
}
/* Each winbindd child should only process requests for one domain - make sure
we only set it online / offline for that domain. */
DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
(unsigned int)child->pid, child->domain->name ));
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
MSG_WINBIND_ONLINE,
(uint8 *)child->domain->name,
strlen(child->domain->name)+1);
}
}
/* Forward the online/offline messages to our children. */
void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
struct winbindd_child *child;
DEBUG(10,("winbind_msg_onlinestatus: got onlinestatus message.\n"));
for (child = children; child != NULL; child = child->next) {
if (child->domain && child->domain->primary) {
DEBUG(10,("winbind_msg_onlinestatus: "
"sending message to pid %u of primary domain.\n",
(unsigned int)child->pid));
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
MSG_WINBIND_ONLINESTATUS,
(uint8 *)data->data,
data->length);
break;
}
}
}
static void account_lockout_policy_handler(struct event_context *ctx,
struct timed_event *te,
const struct timeval *now,
void *private_data)
{
struct winbindd_child *child =
(struct winbindd_child *)private_data;
TALLOC_CTX *mem_ctx = NULL;
struct winbindd_methods *methods;
SAM_UNK_INFO_12 lockout_policy;
NTSTATUS result;
DEBUG(10,("account_lockout_policy_handler called\n"));
if (child->lockout_policy_event) {
TALLOC_FREE(child->lockout_policy_event);
}
if ( !winbindd_can_contact_domain( child->domain ) ) {
DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
"do not have an incoming trust to domain %s\n",
child->domain->name));
return;
}
methods = child->domain->methods;
mem_ctx = talloc_init("account_lockout_policy_handler ctx");
if (!mem_ctx) {
result = NT_STATUS_NO_MEMORY;
} else {
result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
}
talloc_destroy(mem_ctx);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
nt_errstr(result)));
}
child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
timeval_current_ofs(3600, 0),
"account_lockout_policy_handler",
account_lockout_policy_handler,
child);
}
/* Deal with a request to go offline. */
static void child_msg_offline(struct messaging_context *msg,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
struct winbindd_domain *domain;
const char *domainname = (const char *)data->data;
if (data->data == NULL || data->length == 0) {
return;
}
DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
if (!lp_winbind_offline_logon()) {
DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
return;
}
/* Mark the requested domain offline. */
for (domain = domain_list(); domain; domain = domain->next) {
if (domain->internal) {
continue;
}
if (strequal(domain->name, domainname)) {
DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
set_domain_offline(domain);
}
}
}
/* Deal with a request to go online. */
static void child_msg_online(struct messaging_context *msg,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
struct winbindd_domain *domain;
const char *domainname = (const char *)data->data;
if (data->data == NULL || data->length == 0) {
return;
}
DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
if (!lp_winbind_offline_logon()) {
DEBUG(10,("child_msg_online: rejecting online message.\n"));
return;
}
/* Set our global state as online. */
set_global_winbindd_state_online();
/* Try and mark everything online - delete any negative cache entries
to force a reconnect now. */
for (domain = domain_list(); domain; domain = domain->next) {
if (domain->internal) {
continue;
}
if (strequal(domain->name, domainname)) {
DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
winbindd_flush_negative_conn_cache(domain);
set_domain_online_request(domain);
}
}
}
static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
{
struct winbindd_domain *domain;
char *buf = NULL;
if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
get_global_winbindd_state_offline() ?
"Offline":"Online")) == NULL) {
return NULL;
}
for (domain = domain_list(); domain; domain = domain->next) {
if ((buf = talloc_asprintf_append(buf, "%s:%s ",
domain->name,
domain->online ?
"Online":"Offline")) == NULL) {
return NULL;
}
}
buf = talloc_asprintf_append(buf, "\n");
DEBUG(5,("collect_onlinestatus: %s", buf));
return buf;
}
static void child_msg_onlinestatus(struct messaging_context *msg_ctx,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
TALLOC_CTX *mem_ctx;
const char *message;
struct server_id *sender;
DEBUG(5,("winbind_msg_onlinestatus received.\n"));
if (!data->data) {
return;
}
sender = (struct server_id *)data->data;
mem_ctx = talloc_init("winbind_msg_onlinestatus");
if (mem_ctx == NULL) {
return;
}
message = collect_onlinestatus(mem_ctx);
if (message == NULL) {
talloc_destroy(mem_ctx);
return;
}
messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
(uint8 *)message, strlen(message) + 1);
talloc_destroy(mem_ctx);
}
static BOOL fork_domain_child(struct winbindd_child *child)
{
int fdpair[2];
struct winbindd_cli_state state;
struct winbindd_domain *domain;
if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
DEBUG(0, ("Could not open child pipe: %s\n",
strerror(errno)));
return False;
}
ZERO_STRUCT(state);
state.pid = sys_getpid();
/* Stop zombies */
CatchChild();
/* Ensure we don't process messages whilst we're
changing the disposition for the child. */
message_block();
child->pid = sys_fork();
if (child->pid == -1) {
DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
message_unblock();
return False;
}
if (child->pid != 0) {
/* Parent */
close(fdpair[0]);
child->next = child->prev = NULL;
DLIST_ADD(children, child);
child->event.fd = fdpair[1];
child->event.flags = 0;
child->requests = NULL;
add_fd_event(&child->event);
/* We're ok with online/offline messages now. */
message_unblock();
return True;
}
/* Child */
state.sock = fdpair[0];
close(fdpair[1]);
/* tdb needs special fork handling */
if (tdb_reopen_all(1) == -1) {
DEBUG(0,("tdb_reopen_all failed.\n"));
_exit(0);
}
close_conns_after_fork();
if (!override_logfile) {
lp_set_logfile(child->logfilename);
reopen_logs();
}
/* Don't handle the same messages as our parent. */
messaging_deregister(winbind_messaging_context(),
MSG_SMB_CONF_UPDATED, NULL);
messaging_deregister(winbind_messaging_context(),
MSG_SHUTDOWN, NULL);
messaging_deregister(winbind_messaging_context(),
MSG_WINBIND_OFFLINE, NULL);
messaging_deregister(winbind_messaging_context(),
MSG_WINBIND_ONLINE, NULL);
messaging_deregister(winbind_messaging_context(),
MSG_WINBIND_ONLINESTATUS, NULL);
/* The child is ok with online/offline messages now. */
message_unblock();
/* Handle online/offline messages. */
messaging_register(winbind_messaging_context(), NULL,
MSG_WINBIND_OFFLINE, child_msg_offline);
messaging_register(winbind_messaging_context(), NULL,
MSG_WINBIND_ONLINE, child_msg_online);
messaging_register(winbind_messaging_context(), NULL,
MSG_WINBIND_ONLINESTATUS, child_msg_onlinestatus);
if ( child->domain ) {
child->domain->startup = True;
child->domain->startup_time = time(NULL);
}
/* Ensure we have no pending check_online events other
than one for this domain. */
for (domain = domain_list(); domain; domain = domain->next) {
if (domain != child->domain) {
if (domain->check_online_event) {
TALLOC_FREE(domain->check_online_event);
}
}
}
/* Ensure we're not handling an event inherited from
our parent. */
cancel_named_event(winbind_event_context(),
"krb5_ticket_refresh_handler");
/* We might be in the idmap child...*/
if (child->domain && !(child->domain->internal) &&
lp_winbind_offline_logon()) {
set_domain_online_request(child->domain);
child->lockout_policy_event = event_add_timed(
winbind_event_context(), NULL, timeval_zero(),
"account_lockout_policy_handler",
account_lockout_policy_handler,
child);
}
while (1) {
int ret;
fd_set read_fds;
struct timeval t;
struct timeval *tp;
struct timeval now;
/* free up any talloc memory */
lp_TALLOC_FREE();
main_loop_TALLOC_FREE();
run_events(winbind_event_context(), 0, NULL, NULL);
GetTimeOfDay(&now);
if (child->domain && child->domain->startup &&
(now.tv_sec > child->domain->startup_time + 30)) {
/* No longer in "startup" mode. */
DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
child->domain->name ));
child->domain->startup = False;
}
tp = get_timed_events_timeout(winbind_event_context(), &t);
if (tp) {
DEBUG(11,("select will use timeout of %u.%u seconds\n",
(unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
}
/* Handle messages */
message_dispatch(winbind_messaging_context());
FD_ZERO(&read_fds);
FD_SET(state.sock, &read_fds);
ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp);
if (ret == 0) {
DEBUG(11,("nothing is ready yet, continue\n"));
continue;
}
if (ret == -1 && errno == EINTR) {
/* We got a signal - continue. */
continue;
}
if (ret == -1 && errno != EINTR) {
DEBUG(0,("select error occured\n"));
perror("select");
return False;
}
/* fetch a request from the main daemon */
child_read_request(&state);
if (state.finished) {
/* we lost contact with our parent */
exit(0);
}
DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
ZERO_STRUCT(state.response);
state.request.null_term = '\0';
child_process_request(child->domain, &state);
SAFE_FREE(state.request.extra_data.data);
cache_store_response(sys_getpid(), &state.response);
SAFE_FREE(state.response.extra_data.data);
/* We just send the result code back, the result
* structure needs to be fetched via the
* winbindd_cache. Hmm. That needs fixing... */
if (write_data(state.sock,
(const char *)&state.response.result,
sizeof(state.response.result)) !=
sizeof(state.response.result)) {
DEBUG(0, ("Could not write result\n"));
exit(1);
}
}
}
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