#include "winbindd.h"
pstring servicesf = CONFIGFILE;
struct winbindd_cli_state *client_list;
static int num_clients;
static BOOL reload_services_file(BOOL test)
{
BOOL ret;
pstring logfile;
if (lp_loaded()) {
pstring fname;
pstrcpy(fname,lp_configfile());
if (file_exist(fname,NULL) && !strcsequal(fname,servicesf)) {
pstrcpy(servicesf,fname);
test = False;
}
}
snprintf(logfile, sizeof(logfile), "%s/log.winbindd", LOGFILEBASE);
lp_set_logfile(logfile);
reopen_logs();
ret = lp_load(servicesf,False,False,True);
snprintf(logfile, sizeof(logfile), "%s/log.winbindd", LOGFILEBASE);
lp_set_logfile(logfile);
reopen_logs();
load_interfaces();
return(ret);
}
#if DUMP_CORE
static BOOL dump_core(void)
{
char *p;
pstring dname;
pstrcpy( dname, lp_logfile() );
if ((p=strrchr(dname,'/')))
*p=0;
pstrcat( dname, "/corefiles" );
mkdir( dname, 0700 );
sys_chown( dname, getuid(), getgid() );
chmod( dname, 0700 );
if ( chdir(dname) )
return( False );
umask( ~(0700) );
#ifdef HAVE_GETRLIMIT
#ifdef RLIMIT_CORE
{
struct rlimit rlp;
getrlimit( RLIMIT_CORE, &rlp );
rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
setrlimit( RLIMIT_CORE, &rlp );
getrlimit( RLIMIT_CORE, &rlp );
DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
}
#endif
#endif
DEBUG(0,("Dumping core in %s\n",dname));
abort();
return( True );
}
#endif
static void fault_quit(void)
{
#if DUMP_CORE
dump_core();
#endif
}
static void winbindd_status(void)
{
struct winbindd_cli_state *tmp;
DEBUG(0, ("winbindd status:\n"));
DEBUG(0, ("\t%d clients currently active\n", num_clients));
if (DEBUGLEVEL >= 2 && num_clients) {
DEBUG(2, ("\tclient list:\n"));
for(tmp = client_list; tmp; tmp = tmp->next) {
DEBUG(2, ("\t\tpid %d, sock %d, rbl %d, wbl %d\n",
tmp->pid, tmp->sock, tmp->read_buf_len,
tmp->write_buf_len));
}
}
}
static void print_winbindd_status(void)
{
winbindd_status();
winbindd_idmap_status();
winbindd_cache_status();
winbindd_cm_status();
}
static void flush_caches(void)
{
winbindd_flush_cache();
}
static void terminate(void)
{
pstring path;
winbindd_idmap_close();
snprintf(path, sizeof(path), "%s/%s",
WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
unlink(path);
exit(0);
}
static BOOL do_sigterm;
static void termination_handler(int signum)
{
do_sigterm = True;
sys_select_signal();
}
static BOOL do_sigusr1;
static void sigusr1_handler(int signum)
{
do_sigusr1 = True;
sys_select_signal();
}
static BOOL do_sighup;
static void sighup_handler(int signum)
{
do_sighup = True;
sys_select_signal();
}
static int create_sock(void)
{
struct sockaddr_un sunaddr;
struct stat st;
int sock;
mode_t old_umask;
pstring path;
if (lstat(WINBINDD_SOCKET_DIR, &st) == -1) {
if (errno == ENOENT) {
if (mkdir(WINBINDD_SOCKET_DIR, 0755) == -1) {
DEBUG(0, ("error creating socket directory "
"%s: %s\n", WINBINDD_SOCKET_DIR,
strerror(errno)));
return -1;
}
} else {
DEBUG(0, ("lstat failed on socket directory %s: %s\n",
WINBINDD_SOCKET_DIR, strerror(errno)));
return -1;
}
} else {
if (!S_ISDIR(st.st_mode)) {
DEBUG(0, ("socket directory %s isn't a directory\n",
WINBINDD_SOCKET_DIR));
return -1;
}
if ((st.st_uid != sec_initial_uid()) ||
((st.st_mode & 0777) != 0755)) {
DEBUG(0, ("invalid permissions on socket directory "
"%s\n", WINBINDD_SOCKET_DIR));
return -1;
}
}
old_umask = umask(0);
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock == -1) {
perror("socket");
return -1;
}
snprintf(path, sizeof(path), "%s/%s",
WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
unlink(path);
memset(&sunaddr, 0, sizeof(sunaddr));
sunaddr.sun_family = AF_UNIX;
safe_strcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path)-1);
if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) == -1) {
DEBUG(0, ("bind failed on winbind socket %s: %s\n",
path,
strerror(errno)));
close(sock);
return -1;
}
if (listen(sock, 5) == -1) {
DEBUG(0, ("listen failed on winbind socket %s: %s\n",
path,
strerror(errno)));
close(sock);
return -1;
}
umask(old_umask);
return sock;
}
struct dispatch_table {
enum winbindd_cmd cmd;
enum winbindd_result (*fn)(struct winbindd_cli_state *state);
char *winbindd_cmd_name;
};
static struct dispatch_table dispatch_table[] = {
{ WINBINDD_GETPWNAM_FROM_USER, winbindd_getpwnam_from_user, "GETPWNAM_FROM_USER" },
{ WINBINDD_GETPWNAM_FROM_UID, winbindd_getpwnam_from_uid, "GETPWNAM_FROM_UID" },
{ WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
{ WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
{ WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
{ WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
{ WINBINDD_GETGRNAM_FROM_GROUP, winbindd_getgrnam_from_group, "GETGRNAM_FROM_GROUP" },
{ WINBINDD_GETGRNAM_FROM_GID, winbindd_getgrnam_from_gid, "GETGRNAM_FROM_GID" },
{ WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
{ WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
{ WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
{ WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
#if ALLOW_WINBIND_AUTH_CRAP
{ WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
#endif
{ WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
{ WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
{ WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
{ WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains, "LIST_TRUSTDOM" },
{ WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
{ WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
{ WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
{ WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
{ WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
{ WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
{ WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
{ WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
{ WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
{ WINBINDD_NUM_CMDS, NULL, "NONE" }
};
static void process_request(struct winbindd_cli_state *state)
{
struct dispatch_table *table = dispatch_table;
SAFE_FREE(state->response.extra_data);
ZERO_STRUCT(state->response);
state->response.result = WINBINDD_ERROR;
state->response.length = sizeof(struct winbindd_response);
for (table = 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(state);
break;
}
}
if (!table->fn)
DEBUG(10,("process_request: unknown request fn number %d\n", (int)state->request.cmd ));
if (!state->response.extra_data)
state->response.length = sizeof(struct winbindd_response);
}
static void new_connection(int accept_sock)
{
struct sockaddr_un sunaddr;
struct winbindd_cli_state *state;
socklen_t len;
int sock;
len = sizeof(sunaddr);
do {
sock = accept(accept_sock, (struct sockaddr *)&sunaddr, &len);
} while (sock == -1 && errno == EINTR);
if (sock == -1)
return;
DEBUG(6,("accepted socket %d\n", sock));
if ((state = (struct winbindd_cli_state *)
malloc(sizeof(*state))) == NULL)
return;
ZERO_STRUCTP(state);
state->sock = sock;
DLIST_ADD(client_list, state);
num_clients++;
}
static void remove_client(struct winbindd_cli_state *state)
{
if (state != NULL) {
close(state->sock);
free_getent_state(state->getpwent_state);
free_getent_state(state->getgrent_state);
SAFE_FREE(state->response.extra_data);
DLIST_REMOVE(client_list, state);
SAFE_FREE(state);
num_clients--;
}
}
static void process_packet(struct winbindd_cli_state *state)
{
state->pid = state->request.pid;
process_request(state);
state->read_buf_len = 0;
state->write_buf_len = sizeof(struct winbindd_response);
}
static void client_read(struct winbindd_cli_state *state)
{
int n;
do {
n = read(state->sock, state->read_buf_len + (char *)&state->request,
sizeof(state->request) - state->read_buf_len);
} while (n == -1 && errno == EINTR);
DEBUG(10,("client_read: read %d bytes. Need %d more for a full request.\n", n,
sizeof(state->request) - n - state->read_buf_len ));
if (n == -1 || n == 0) {
DEBUG(5,("read failed on sock %d, pid %d: %s\n",
state->sock, state->pid,
(n == -1) ? strerror(errno) : "EOF"));
state->finished = True;
return;
}
state->read_buf_len += n;
}
static void client_write(struct winbindd_cli_state *state)
{
char *data;
int num_written;
if (!state->write_extra_data) {
data = (char *)&state->response + sizeof(state->response) -
state->write_buf_len;
} else {
data = (char *)state->response.extra_data +
state->response.length -
sizeof(struct winbindd_response) -
state->write_buf_len;
}
do {
num_written = write(state->sock, data, state->write_buf_len);
} while (num_written == -1 && errno == EINTR);
DEBUG(10,("client_write: wrote %d bytes.\n", num_written ));
if (num_written == -1 || num_written == 0) {
DEBUG(3,("write failed on sock %d, pid %d: %s\n",
state->sock, state->pid,
(num_written == -1) ? strerror(errno) : "EOF"));
state->finished = True;
SAFE_FREE(state->response.extra_data);
return;
}
state->write_buf_len -= num_written;
if (state->write_buf_len == 0) {
if (state->write_extra_data) {
SAFE_FREE(state->response.extra_data);
state->write_extra_data = False;
DEBUG(10,("client_write: client_write: complete response written.\n"));
} else if (state->response.length >
sizeof(struct winbindd_response)) {
state->write_buf_len =
state->response.length -
sizeof(struct winbindd_response);
DEBUG(10,("client_write: need to write %d extra data bytes.\n", (int)state->write_buf_len));
state->write_extra_data = True;
}
}
}
static void process_loop(int accept_sock)
{
while (1) {
struct winbindd_cli_state *state;
fd_set r_fds, w_fds;
int maxfd = accept_sock, selret;
struct timeval timeout;
lp_talloc_free();
FD_ZERO(&r_fds);
FD_ZERO(&w_fds);
FD_SET(accept_sock, &r_fds);
timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
timeout.tv_usec = 0;
state = client_list;
while (state) {
if (state->finished) {
struct winbindd_cli_state *next = state->next;
remove_client(state);
state = next;
continue;
}
if (state->sock > maxfd)
maxfd = state->sock;
if (state->read_buf_len != sizeof(state->request))
FD_SET(state->sock, &r_fds);
if (state->write_buf_len)
FD_SET(state->sock, &w_fds);
state = state->next;
}
selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
if (selret == 0)
continue;
if ((selret == -1 && errno != EINTR) || selret == 0) {
perror("select");
exit(1);
}
if (selret > 0) {
if (FD_ISSET(accept_sock, &r_fds))
new_connection(accept_sock);
for (state = client_list; state; state = state->next) {
if (FD_ISSET(state->sock, &r_fds)) {
client_read(state);
#if 0
if (state->read_buf_len >= sizeof(int)
&& *(int *) state->buf != sizeof(state->request)) {
struct winbindd_cli_state *rem_state = state;
DEBUG(0,("process_loop: Invalid request size (%d) send, should be (%d)\n",
*(int *) rem_state->buf, sizeof(rem_state->request) ));
state = state_next;
remove_client(rem_state);
continue;
}
#endif
if (state->read_buf_len ==
sizeof(state->request)) {
process_packet(state);
}
}
if (FD_ISSET(state->sock, &w_fds))
client_write(state);
}
}
if (do_sigterm)
terminate();
if (do_sighup) {
flush_caches();
reload_services_file(True);
do_sighup = False;
}
if (do_sigusr1) {
print_winbindd_status();
do_sigusr1 = False;
}
}
}
struct winbindd_state server_state;
int main(int argc, char **argv)
{
extern pstring global_myname;
extern fstring global_myworkgroup;
extern BOOL append_log;
pstring logfile;
int accept_sock;
BOOL interactive = False;
int opt, new_debuglevel = -1;
CatchSignal(SIGUSR1, SIG_IGN);
TimeInit();
charset_initialise();
fault_setup((void (*)(void *))fault_quit );
sec_init();
SETENV(WINBINDD_DONT_ENV, "1", 1);
while ((opt = getopt(argc, argv, "id:s:")) != EOF) {
switch (opt) {
case 'i':
interactive = True;
break;
case 'd':
new_debuglevel = atoi(optarg);
break;
case 's':
pstrcpy(servicesf,optarg);
break;
default:
printf("Unknown option %c\n", (char)opt);
exit(1);
}
}
append_log = True;
snprintf(logfile, sizeof(logfile), "%s/log.winbindd", LOGFILEBASE);
lp_set_logfile(logfile);
setup_logging("winbindd", interactive);
reopen_logs();
DEBUG(1, ("winbindd version %s started.\n", VERSION ) );
DEBUGADD( 1, ( "Copyright The Samba Team 2000-2001\n" ) );
if (!reload_services_file(False)) {
DEBUG(0, ("error opening config file\n"));
exit(1);
}
codepage_initialise(lp_client_code_page());
if (!*global_myname) {
char *p;
fstrcpy(global_myname, myhostname());
p = strchr(global_myname, '.');
if (p)
*p = 0;
}
fstrcpy(global_myworkgroup, lp_workgroup());
if (new_debuglevel != -1)
DEBUGLEVEL = new_debuglevel;
if (!interactive)
become_daemon();
#if HAVE_SETPGID
if (interactive)
setpgid( (pid_t)0, (pid_t)0);
#endif
load_interfaces();
secrets_init();
get_domain_info();
ZERO_STRUCT(server_state);
if (!winbindd_param_init())
return 1;
if (!winbindd_idmap_init())
return 1;
winbindd_cache_init();
BlockSignals(False, SIGINT);
BlockSignals(False, SIGQUIT);
BlockSignals(False, SIGTERM);
BlockSignals(False, SIGUSR1);
BlockSignals(False, SIGHUP);
CatchSignal(SIGINT, termination_handler);
CatchSignal(SIGQUIT, termination_handler);
CatchSignal(SIGTERM, termination_handler);
CatchSignal(SIGPIPE, SIG_IGN);
CatchSignal(SIGUSR1, sigusr1_handler);
CatchSignal(SIGHUP, sighup_handler);
if ((accept_sock = create_sock()) == -1) {
DEBUG(0, ("failed to create socket\n"));
return 1;
}
process_loop(accept_sock);
return 0;
}