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/* 
   Samba Unix/Linux SMB client library 
   Distributed SMB/CIFS Server Management Utility 
   Copyright (C) 2001 Steve French  (sfrench@us.ibm.com)
   Copyright (C) 2001 Jim McDonough (jmcd@us.ibm.com)
   Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
   Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)

   Originally written by Steve and Jim. Largely rewritten by tridge in
   November 2001.

   Reworked again by abartlet in December 2001

   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 3 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, see <http://www.gnu.org/licenses/>.  */
 
/*****************************************************/
/*                                                   */
/*   Distributed SMB/CIFS Server Management Utility  */
/*                                                   */
/*   The intent was to make the syntax similar       */
/*   to the NET utility (first developed in DOS      */
/*   with additional interesting & useful functions  */
/*   added in later SMB server network operating     */
/*   systems).                                       */
/*                                                   */
/*****************************************************/

#include "includes.h"
#include "utils/net.h"

/***********************************************************************/
/* Beginning of internationalization section.  Translatable constants  */
/* should be kept in this area and referenced in the rest of the code. */
/*                                                                     */
/* No functions, outside of Samba or LSB (Linux Standards Base) should */
/* be used (if possible).                                              */
/***********************************************************************/

#define YES_STRING              "Yes"
#define NO_STRING               "No"

/************************************************************************************/
/*                       end of internationalization section                        */
/************************************************************************************/

/* Yes, these buggers are globals.... */
const char *opt_requester_name = NULL;
const char *opt_host = NULL;
const char *opt_password = NULL;
const char *opt_user_name = NULL;
bool opt_user_specified = False;
const char *opt_workgroup = NULL;
int opt_long_list_entries = 0;
int opt_reboot = 0;
int opt_force = 0;
int opt_stdin = 0;
int opt_port = 0;
int opt_verbose = 0;
int opt_maxusers = -1;
const char *opt_comment = "";
const char *opt_container = NULL;
int opt_flags = -1;
int opt_timeout = 0;
const char *opt_target_workgroup = NULL;
int opt_machine_pass = 0;
int opt_localgroup = False;
int opt_domaingroup = False;
static int do_talloc_report=False;
const char *opt_newntname = "";
int opt_rid = 0;
int opt_acls = 0;
int opt_attrs = 0;
int opt_timestamps = 0;
const char *opt_exclude = NULL;
const char *opt_destination = NULL;
int opt_testmode = False;

int opt_have_ip = False;
struct sockaddr_storage opt_dest_ip;

extern bool AllowDebugChange;

uint32 get_sec_channel_type(const char *param) 
{
	if (!(param && *param)) {
		return get_default_sec_channel();
	} else {
		if (strequal(param, "PDC")) {
			return SEC_CHAN_BDC;
		} else if (strequal(param, "BDC")) {
			return SEC_CHAN_BDC;
		} else if (strequal(param, "MEMBER")) {
			return SEC_CHAN_WKSTA;
#if 0			
		} else if (strequal(param, "DOMAIN")) {
			return SEC_CHAN_DOMAIN;
#endif
		} else {
			return get_default_sec_channel();
		}
	}
}

/*
  run a function from a function table. If not found then
  call the specified usage function 
*/
int net_run_function(int argc, const char **argv, struct functable *table, 
		     int (*usage_fn)(int argc, const char **argv))
{
	int i;
	
	if (argc < 1) {
		d_printf("\nUsage: \n");
		return usage_fn(argc, argv);
	}
	for (i=0; table[i].funcname; i++) {
		if (StrCaseCmp(argv[0], table[i].funcname) == 0)
			return table[i].fn(argc-1, argv+1);
	}
	d_fprintf(stderr, "No command: %s\n", argv[0]);
	return usage_fn(argc, argv);
}

/*
 * run a function from a function table.
 */
int net_run_function2(int argc, const char **argv, const char *whoami,
		      struct functable2 *table)
{
	int i;

	if (argc != 0) {
		for (i=0; table[i].funcname; i++) {
			if (StrCaseCmp(argv[0], table[i].funcname) == 0)
				return table[i].fn(argc-1, argv+1);
		}
	}

	for (i=0; table[i].funcname != NULL; i++) {
		d_printf("%s %-15s %s\n", whoami, table[i].funcname,
			 table[i].helptext);
	}

	return -1;
}

/****************************************************************************
 Connect to \\server\service.
****************************************************************************/

NTSTATUS connect_to_service(struct cli_state **c,
					struct sockaddr_storage *server_ss,
					const char *server_name,
					const char *service_name,
					const char *service_type)
{
	NTSTATUS nt_status;

	opt_password = net_prompt_pass(opt_user_name);
	if (!opt_password) {
		return NT_STATUS_NO_MEMORY;
	}

	nt_status = cli_full_connection(c, NULL, server_name,
					server_ss, opt_port,
					service_name, service_type,
					opt_user_name, opt_workgroup,
					opt_password, 0, Undefined, NULL);
	if (NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	} else {
		d_fprintf(stderr, "Could not connect to server %s\n", server_name);

		/* Display a nicer message depending on the result */

		if (NT_STATUS_V(nt_status) ==
		    NT_STATUS_V(NT_STATUS_LOGON_FAILURE))
			d_fprintf(stderr, "The username or password was not correct.\n");

		if (NT_STATUS_V(nt_status) ==
		    NT_STATUS_V(NT_STATUS_ACCOUNT_LOCKED_OUT))
			d_fprintf(stderr, "The account was locked out.\n");

		if (NT_STATUS_V(nt_status) ==
		    NT_STATUS_V(NT_STATUS_ACCOUNT_DISABLED))
			d_fprintf(stderr, "The account was disabled.\n");

		return nt_status;
	}
}

/****************************************************************************
 Connect to \\server\ipc$.
****************************************************************************/

NTSTATUS connect_to_ipc(struct cli_state **c,
			struct sockaddr_storage *server_ss,
			const char *server_name)
{
	return connect_to_service(c, server_ss, server_name, "IPC$", "IPC");
}

/****************************************************************************
 Connect to \\server\ipc$ anonymously.
****************************************************************************/

NTSTATUS connect_to_ipc_anonymous(struct cli_state **c,
				struct sockaddr_storage *server_ss,
				const char *server_name)
{
	NTSTATUS nt_status;

	nt_status = cli_full_connection(c, opt_requester_name, server_name,
					server_ss, opt_port,
					"IPC$", "IPC",
					"", "",
					"", 0, Undefined, NULL);

	if (NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	} else {
		DEBUG(1,("Cannot connect to server (anonymously).  Error was %s\n", nt_errstr(nt_status)));
		return nt_status;
	}
}

/****************************************************************************
 Return malloced user@realm for krb5 login.
****************************************************************************/

static char *get_user_and_realm(const char *username)
{
	char *user_and_realm = NULL;

	if (!username) {
		return NULL;
	}
	if (strchr_m(username, '@')) {
		user_and_realm = SMB_STRDUP(username);
	} else {
		if (asprintf(&user_and_realm, "%s@%s", username, lp_realm()) == -1) {
			user_and_realm = NULL;
		}
	}
	return user_and_realm;
}

/****************************************************************************
 Connect to \\server\ipc$ using KRB5.
****************************************************************************/

NTSTATUS connect_to_ipc_krb5(struct cli_state **c,
			struct sockaddr_storage *server_ss,
			const char *server_name)
{
	NTSTATUS nt_status;
	char *user_and_realm = NULL;

	opt_password = net_prompt_pass(opt_user_name);
	if (!opt_password) {
		return NT_STATUS_NO_MEMORY;
	}

	user_and_realm = get_user_and_realm(opt_user_name);
	if (!user_and_realm) {
		return NT_STATUS_NO_MEMORY;
	}

	nt_status = cli_full_connection(c, NULL, server_name,
					server_ss, opt_port,
					"IPC$", "IPC",
					user_and_realm, opt_workgroup,
					opt_password, CLI_FULL_CONNECTION_USE_KERBEROS, 
					Undefined, NULL);

	SAFE_FREE(user_and_realm);

	if (NT_STATUS_IS_OK(nt_status)) {
		return nt_status;
	} else {
		DEBUG(1,("Cannot connect to server using kerberos.  Error was %s\n", nt_errstr(nt_status)));
		return nt_status;
	}
}

/**
 * Connect a server and open a given pipe
 *
 * @param cli_dst		A cli_state 
 * @param pipe			The pipe to open
 * @param got_pipe		boolean that stores if we got a pipe
 *
 * @return Normal NTSTATUS return.
 **/
NTSTATUS connect_dst_pipe(struct cli_state **cli_dst, struct rpc_pipe_client **pp_pipe_hnd, int pipe_num)
{
	NTSTATUS nt_status;
	char *server_name = SMB_STRDUP("127.0.0.1");
	struct cli_state *cli_tmp = NULL;
	struct rpc_pipe_client *pipe_hnd = NULL;

	if (server_name == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	if (opt_destination) {
		SAFE_FREE(server_name);
		if ((server_name = SMB_STRDUP(opt_destination)) == NULL) {
			return NT_STATUS_NO_MEMORY;
		}
	}

	/* make a connection to a named pipe */
	nt_status = connect_to_ipc(&cli_tmp, NULL, server_name);
	if (!NT_STATUS_IS_OK(nt_status)) {
		SAFE_FREE(server_name);
		return nt_status;
	}

	pipe_hnd = cli_rpc_pipe_open_noauth(cli_tmp, pipe_num, &nt_status);
	if (!pipe_hnd) {
		DEBUG(0, ("couldn't not initialize pipe\n"));
		cli_shutdown(cli_tmp);
		SAFE_FREE(server_name);
		return nt_status;
	}

	*cli_dst = cli_tmp;
	*pp_pipe_hnd = pipe_hnd;
	SAFE_FREE(server_name);

	return nt_status;
}

/****************************************************************************
 Use the local machine account (krb) and password for this session.
****************************************************************************/

int net_use_krb_machine_account(void) 
{
	char *user_name = NULL;

	if (!secrets_init()) {
		d_fprintf(stderr, "ERROR: Unable to open secrets database\n");
		exit(1);
	}

	opt_password = secrets_fetch_machine_password(opt_target_workgroup, NULL, NULL);
	if (asprintf(&user_name, "%s$@%s", global_myname(), lp_realm()) == -1) {
		return -1;
	}
	opt_user_name = user_name;
	return 0;
}

/****************************************************************************
 Use the machine account name and password for this session.
****************************************************************************/

int net_use_machine_account(void)
{
	char *user_name = NULL;

	if (!secrets_init()) {
		d_fprintf(stderr, "ERROR: Unable to open secrets database\n");
		exit(1);
	}

	opt_password = secrets_fetch_machine_password(opt_target_workgroup, NULL, NULL);
	if (asprintf(&user_name, "%s$", global_myname()) == -1) {
		return -1;
	}
	opt_user_name = user_name;
	return 0;
}

bool net_find_server(const char *domain,
			unsigned flags,
			struct sockaddr_storage *server_ss,
			char **server_name)
{
	const char *d = domain ? domain : opt_target_workgroup;

	if (opt_host) {
		*server_name = SMB_STRDUP(opt_host);
	}

	if (opt_have_ip) {
		*server_ss = opt_dest_ip;
		if (!*server_name) {
			char addr[INET6_ADDRSTRLEN];
			print_sockaddr(addr, sizeof(addr), &opt_dest_ip);
			*server_name = SMB_STRDUP(addr);
		}
	} else if (*server_name) {
		/* resolve the IP address */
		if (!resolve_name(*server_name, server_ss, 0x20))  {
			DEBUG(1,("Unable to resolve server name\n"));
			return false;
		}
	} else if (flags & NET_FLAGS_PDC) {
		fstring dc_name;
		struct sockaddr_storage pdc_ss;

		if (get_pdc_ip(d, &pdc_ss)) {
			DEBUG(1,("Unable to resolve PDC server address\n"));
			return false;
		}

		if (is_zero_addr(&pdc_ss)) {
			return false;
		}

		if (!name_status_find(d, 0x1b, 0x20, &pdc_ss, dc_name)) {
			return False;
		}

		*server_name = SMB_STRDUP(dc_name);
		*server_ss = pdc_ss;
	} else if (flags & NET_FLAGS_DMB) {
		struct sockaddr_storage msbrow_ss;
		char addr[INET6_ADDRSTRLEN];

		/*  if (!resolve_name(MSBROWSE, &msbrow_ip, 1)) */
		if (!resolve_name(d, &msbrow_ss, 0x1B))  {
			DEBUG(1,("Unable to resolve domain browser via name lookup\n"));
			return false;
		}
		*server_ss = msbrow_ss;
		print_sockaddr(addr, sizeof(addr), server_ss);
		*server_name = SMB_STRDUP(addr);
	} else if (flags & NET_FLAGS_MASTER) {
		struct sockaddr_storage brow_ss;
		char addr[INET6_ADDRSTRLEN];
		if (!resolve_name(d, &brow_ss, 0x1D))  {
				/* go looking for workgroups */
			DEBUG(1,("Unable to resolve master browser via name lookup\n"));
			return false;
		}
		*server_ss = brow_ss;
		print_sockaddr(addr, sizeof(addr), server_ss);
		*server_name = SMB_STRDUP(addr);
	} else if (!(flags & NET_FLAGS_LOCALHOST_DEFAULT_INSANE)) {
		if (!interpret_string_addr(server_ss,
					"127.0.0.1", AI_NUMERICHOST)) {
			DEBUG(1,("Unable to resolve 127.0.0.1\n"));
			return false;
		}
		*server_name = SMB_STRDUP("127.0.0.1");
	}

	if (!server_name || !*server_name) {
		DEBUG(1,("no server to connect to\n"));
		return False;
	}

	return True;
}

bool net_find_pdc(struct sockaddr_storage *server_ss,
		fstring server_name,
		const char *domain_name)
{
	if (!get_pdc_ip(domain_name, server_ss)) {
		return false;
	}
	if (is_zero_addr(server_ss)) {
		return false;
	}

	if (!name_status_find(domain_name, 0x1b, 0x20, server_ss, server_name)) {
		return false;
	}

	return true;
}

NTSTATUS net_make_ipc_connection(unsigned flags, struct cli_state **pcli)
{
	return net_make_ipc_connection_ex(NULL, NULL, NULL, flags, pcli);
}

NTSTATUS net_make_ipc_connection_ex(const char *domain, const char *server,
                                    struct sockaddr_storage *pss, unsigned flags,
				    struct cli_state **pcli)
{
	char *server_name = NULL;
	struct sockaddr_storage server_ss;
	struct cli_state *cli = NULL;
	NTSTATUS nt_status;

	if ( !server || !pss ) {
		if (!net_find_server(domain, flags, &server_ss, &server_name)) {
			d_fprintf(stderr, "Unable to find a suitable server\n");
			nt_status = NT_STATUS_UNSUCCESSFUL;
			goto done;
		}
	} else {
		server_name = SMB_STRDUP( server );
		server_ss = *pss;
	}

	if (flags & NET_FLAGS_ANONYMOUS) {
		nt_status = connect_to_ipc_anonymous(&cli, &server_ss, server_name);
	} else {
		nt_status = connect_to_ipc(&cli, &server_ss, server_name);
	}

	/* store the server in the affinity cache if it was a PDC */

	if ( (flags & NET_FLAGS_PDC) && NT_STATUS_IS_OK(nt_status) )
		saf_store( cli->server_domain, cli->desthost );

	SAFE_FREE(server_name);
	if (!NT_STATUS_IS_OK(nt_status)) {
		d_fprintf(stderr, "Connection failed: %s\n",
			  nt_errstr(nt_status));
		cli = NULL;
	}

done:
	if (pcli != NULL) {
		*pcli = cli;
	}
	return nt_status;
}

static int net_user(int argc, const char **argv)
{
	if (net_ads_check() == 0)
		return net_ads_user(argc, argv);

	/* if server is not specified, default to PDC? */
	if (net_rpc_check(NET_FLAGS_PDC))
		return net_rpc_user(argc, argv);

	return net_rap_user(argc, argv);
}

static int net_group(int argc, const char **argv)
{
	if (net_ads_check() == 0)
		return net_ads_group(argc, argv);

	if (argc == 0 && net_rpc_check(NET_FLAGS_PDC))
		return net_rpc_group(argc, argv);

	return net_rap_group(argc, argv);
}

static int net_join(int argc, const char **argv)
{
	if (net_ads_check_our_domain() == 0) {
		if (net_ads_join(argc, argv) == 0)
			return 0;
		else
			d_fprintf(stderr, "ADS join did not work, falling back to RPC...\n");
	}
	return net_rpc_join(argc, argv);
}

static int net_changetrustpw(int argc, const char **argv)
{
	if (net_ads_check_our_domain() == 0)
		return net_ads_changetrustpw(argc, argv);

	return net_rpc_changetrustpw(argc, argv);
}

static void set_line_buffering(FILE *f)
{
	setvbuf(f, NULL, _IOLBF, 0);
}

static int net_changesecretpw(int argc, const char **argv)
{
        char *trust_pw;
        uint32 sec_channel_type = SEC_CHAN_WKSTA;

	if(opt_force) {
		if (opt_stdin) {
			set_line_buffering(stdin);
			set_line_buffering(stdout);
			set_line_buffering(stderr);
		}

		trust_pw = get_pass("Enter machine password: ", opt_stdin);

		if (!secrets_store_machine_password(trust_pw, lp_workgroup(), sec_channel_type)) {
			    d_fprintf(stderr, "Unable to write the machine account password in the secrets database");
			    return 1;
		}
		else {
		    d_printf("Modified trust account password in secrets database\n");
		}
	}
	else {
		d_printf("Machine account password change requires the -f flag.\n");
		d_printf("Do NOT use this function unless you know what it does!\n");
		d_printf("This function will change the ADS Domain member machine account password in the secrets.tdb file!\n");
	}

        return 0;
}

static int net_share(int argc, const char **argv)
{
	if (net_rpc_check(0))
		return net_rpc_share(argc, argv);
	return net_rap_share(argc, argv);
}

static int net_file(int argc, const char **argv)
{
	if (net_rpc_check(0))
		return net_rpc_file(argc, argv);
	return net_rap_file(argc, argv);
}

/*
 Retrieve our local SID or the SID for the specified name
 */
static int net_getlocalsid(int argc, const char **argv)
{
        DOM_SID sid;
	const char *name;
	fstring sid_str;

	if (argc >= 1) {
		name = argv[0];
        }
	else {
		name = global_myname();
	}

	if(!initialize_password_db(False, NULL)) {
		DEBUG(0, ("WARNING: Could not open passdb - local sid may not reflect passdb\n"
			  "backend knowledge (such as the sid stored in LDAP)\n"));
	}

	/* first check to see if we can even access secrets, so we don't
	   panic when we can't. */

	if (!secrets_init()) {
		d_fprintf(stderr, "Unable to open secrets.tdb.  Can't fetch domain SID for name: %s\n", name);
		return 1;
	}

	/* Generate one, if it doesn't exist */
	get_global_sam_sid();

	if (!secrets_fetch_domain_sid(name, &sid)) {
		DEBUG(0, ("Can't fetch domain SID for name: %s\n", name));
		return 1;
	}
	sid_to_string(sid_str, &sid);
	d_printf("SID for domain %s is: %s\n", name, sid_str);
	return 0;
}

static int net_setlocalsid(int argc, const char **argv)
{
	DOM_SID sid;

	if ( (argc != 1)
	     || (strncmp(argv[0], "S-1-5-21-", strlen("S-1-5-21-")) != 0)
	     || (!string_to_sid(&sid, argv[0]))
	     || (sid.num_auths != 4)) {
		d_printf("usage: net setlocalsid S-1-5-21-x-y-z\n");
		return 1;
	}

	if (!secrets_store_domain_sid(global_myname(), &sid)) {
		DEBUG(0,("Can't store domain SID as a pdc/bdc.\n"));
		return 1;
	}

	return 0;
}

static int net_setdomainsid(int argc, const char **argv)
{
	DOM_SID sid;

	if ( (argc != 1)
	     || (strncmp(argv[0], "S-1-5-21-", strlen("S-1-5-21-")) != 0)
	     || (!string_to_sid(&sid, argv[0]))
	     || (sid.num_auths != 4)) {
		d_printf("usage: net setdomainsid S-1-5-21-x-y-z\n");
		return 1;
	}

	if (!secrets_store_domain_sid(lp_workgroup(), &sid)) {
		DEBUG(0,("Can't store domain SID.\n"));
		return 1;
	}

	return 0;
}

static int net_getdomainsid(int argc, const char **argv)
{
	DOM_SID domain_sid;
	fstring sid_str;

	if(!initialize_password_db(False, NULL)) {
		DEBUG(0, ("WARNING: Could not open passdb - domain sid may not reflect passdb\n"
			  "backend knowledge (such as the sid stored in LDAP)\n"));
	}

	/* first check to see if we can even access secrets, so we don't
	   panic when we can't. */

	if (!secrets_init()) {
		d_fprintf(stderr, "Unable to open secrets.tdb.  Can't fetch domain"
				  "SID for name: %s\n", get_global_sam_name());
		return 1;
	}

	/* Generate one, if it doesn't exist */
	get_global_sam_sid();

	if (!secrets_fetch_domain_sid(global_myname(), &domain_sid)) {
		d_fprintf(stderr, "Could not fetch local SID\n");
		return 1;
	}
	sid_to_string(sid_str, &domain_sid);
	d_printf("SID for domain %s is: %s\n", global_myname(), sid_str);

	if (!secrets_fetch_domain_sid(opt_workgroup, &domain_sid)) {
		d_fprintf(stderr, "Could not fetch domain SID\n");
		return 1;
	}

	sid_to_string(sid_str, &domain_sid);
	d_printf("SID for domain %s is: %s\n", opt_workgroup, sid_str);

	return 0;
}

#ifdef WITH_FAKE_KASERVER

int net_help_afs(int argc, const char **argv)
{
	d_printf("  net afs key filename\n"
		 "\tImports a OpenAFS KeyFile into our secrets.tdb\n\n");
	d_printf("  net afs impersonate <user> <cell>\n"
		 "\tCreates a token for user@cell\n\n");
	return -1;
}

static int net_afs_key(int argc, const char **argv)
{
	int fd;
	struct afs_keyfile keyfile;

	if (argc != 2) {
		d_printf("usage: 'net afs key <keyfile> cell'\n");
		return -1;
	}

	if (!secrets_init()) {
		d_fprintf(stderr, "Could not open secrets.tdb\n");
		return -1;
	}

	if ((fd = open(argv[0], O_RDONLY, 0)) < 0) {
		d_fprintf(stderr, "Could not open %s\n", argv[0]);
		return -1;
	}

	if (read(fd, &keyfile, sizeof(keyfile)) != sizeof(keyfile)) {
		d_fprintf(stderr, "Could not read keyfile\n");
		return -1;
	}


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