/* 
   Unix SMB/CIFS implementation.
   Network neighbourhood browser.
   
   Copyright (C) Tim Potter      2000
   Copyright (C) Jelmer Vernooij 2003
   
   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/>.
*/

#include "includes.h"
#include "popt_common.h"
#include "rpc_client/cli_pipe.h"
#include "../librpc/gen_ndr/ndr_srvsvc_c.h"
#include "libsmb/libsmb.h"
#include "libsmb/clirap.h"

static int use_bcast;

/* How low can we go? */

enum tree_level {LEV_WORKGROUP, LEV_SERVER, LEV_SHARE};
static enum tree_level level = LEV_SHARE;

/* Holds a list of workgroups or servers */

struct smb_name_list {
        struct smb_name_list *prev, *next;
        char *name, *comment;
        uint32_t server_type;
};

static struct smb_name_list *workgroups, *servers, *shares;

static void free_name_list(struct smb_name_list *list)
{
        while(list)
                DLIST_REMOVE(list, list);
}

static void add_name(const char *machine_name, uint32_t server_type,
                     const char *comment, void *state)
{
        struct smb_name_list **name_list = (struct smb_name_list **)state;
        struct smb_name_list *new_name;

        new_name = SMB_MALLOC_P(struct smb_name_list);

        if (!new_name)
                return;

        ZERO_STRUCTP(new_name);

	new_name->name = SMB_STRDUP(machine_name);
	new_name->comment = SMB_STRDUP(comment);
        new_name->server_type = server_type;

	if (!new_name->name || !new_name->comment) {
		SAFE_FREE(new_name->name);
		SAFE_FREE(new_name->comment);
		SAFE_FREE(new_name);
		return;
	}

        DLIST_ADD(*name_list, new_name);
}

/****************************************************************************
  display tree of smb workgroups, servers and shares
****************************************************************************/
static bool get_workgroups(struct user_auth_info *user_info)
{
        struct cli_state *cli;
        struct sockaddr_storage server_ss;
	TALLOC_CTX *ctx = talloc_tos();
	char *master_workgroup = NULL;

        /* Try to connect to a #1d name of our current workgroup.  If that
           doesn't work broadcast for a master browser and then jump off
           that workgroup. */

	master_workgroup = talloc_strdup(ctx, lp_workgroup());
	if (!master_workgroup) {
		return false;
	}

	if (!use_bcast && !find_master_ip(lp_workgroup(), &server_ss)) {
		DEBUG(4,("Unable to find master browser for workgroup %s, "
			 "falling back to broadcast\n",
			 master_workgroup));
		use_bcast = true;
	}

	if (!use_bcast) {
		char addr[INET6_ADDRSTRLEN];

		print_sockaddr(addr, sizeof(addr), &server_ss);

		cli = get_ipc_connect(addr, &server_ss, user_info);
		if (cli == NULL) {
			return false;
		}
	} else {
		cli = get_ipc_connect_master_ip_bcast(talloc_tos(),
						      user_info,
						      &master_workgroup);
		if (cli == NULL) {
			DEBUG(4, ("Unable to find master browser by "
				  "broadcast\n"));
			return false;
		}
	}

        if (!cli_NetServerEnum(cli, master_workgroup,
                               SV_TYPE_DOMAIN_ENUM, add_name, &workgroups))
                return False;

        return True;
}

/* Retrieve the list of servers for a given workgroup */

static bool get_servers(char *workgroup, struct user_auth_info *user_info)
{
        struct cli_state *cli;
        struct sockaddr_storage server_ss;
	char addr[INET6_ADDRSTRLEN];

        /* Open an IPC$ connection to the master browser for the workgroup */

        if (!find_master_ip(workgroup, &server_ss)) {
                DEBUG(4, ("Cannot find master browser for workgroup %s\n",
                          workgroup));
                return False;
        }

	print_sockaddr(addr, sizeof(addr), &server_ss);
        if (!(cli = get_ipc_connect(addr, &server_ss, user_info)))
                return False;

        if (!cli_NetServerEnum(cli, workgroup, SV_TYPE_ALL, add_name,
                               &servers))
                return False;

        return True;
}

static bool get_rpc_shares(struct cli_state *cli,
			   void (*fn)(const char *, uint32_t, const char *, void *),
			   void *state)
{
	NTSTATUS status;
	struct rpc_pipe_client *pipe_hnd = NULL;
	TALLOC_CTX *mem_ctx;
	WERROR werr;
	struct srvsvc_NetShareInfoCtr info_ctr;
	struct srvsvc_NetShareCtr1 ctr1;
	int i;
	uint32_t resume_handle = 0;
	uint32_t total_entries = 0;
	struct dcerpc_binding_handle *b;

	mem_ctx = talloc_new(NULL);
	if (mem_ctx == NULL) {
		DEBUG(0, ("talloc_new failed\n"));
		return False;
	}

	status = cli_rpc_pipe_open_noauth(cli, &ndr_table_srvsvc,
					  &pipe_hnd);

	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(10, ("Could not connect to srvsvc pipe: %s\n",
			   nt_errstr(status)));
		TALLOC_FREE(mem_ctx);
		return False;
	}

	b = pipe_hnd->binding_handle;

	ZERO_STRUCT(info_ctr);
	ZERO_STRUCT(ctr1);

	info_ctr.level = 1;
	info_ctr.ctr.ctr1 = &ctr1;

	status = dcerpc_srvsvc_NetShareEnumAll(b, mem_ctx,
					       pipe_hnd->desthost,
					       &info_ctr,
					       0xffffffff,
					       &total_entries,
					       &resume_handle,
					       &werr);

	if (!NT_STATUS_IS_OK(status) || !W_ERROR_IS_OK(werr)) {
		TALLOC_FREE(mem_ctx);
		TALLOC_FREE(pipe_hnd);
		return False;
	}

	for (i=0; i < info_ctr.ctr.ctr1->count; i++) {
		struct srvsvc_NetShareInfo1 info = info_ctr.ctr.ctr1->array[i];
		fn(info.name, info.type, info.comment, state);
	}

	TALLOC_FREE(mem_ctx);
	TALLOC_FREE(pipe_hnd);
	return True;
}


static bool get_shares(char *server_name, struct user_auth_info *user_info)
{
        struct cli_state *cli;

        if (!(cli = get_ipc_connect(server_name, NULL, user_info)))
                return False;

	if (get_rpc_shares(cli, add_name, &shares))
		return True;

        if (!cli_RNetShareEnum(cli, add_name, &shares))
                return False;

        return True;
}

static bool print_tree(struct user_auth_info *user_info)
{
        struct smb_name_list *wg, *sv, *sh;

        /* List workgroups */

        if (!get_workgroups(user_info))
                return False;

        for (wg = workgroups; wg; wg = wg->next) {

                printf("%s\n", wg->name);

                /* List servers */

                free_name_list(servers);
                servers = NULL;

                if (level == LEV_WORKGROUP || 
                    !get_servers(wg->name, user_info))
                        continue;

                for (sv = servers; sv; sv = sv->next) {

                        printf("\t\\\\%-15s\t\t%s\n", 
			       sv->name, sv->comment);

                        /* List shares */

                        free_name_list(shares);
                        shares = NULL;

                        if (level == LEV_SERVER ||
                            !get_shares(sv->name, user_info))
                                continue;

                        for (sh = shares; sh; sh = sh->next) {
                                printf("\t\t\\\\%s\\%-15s\t%s\n", 
				       sv->name, sh->name, sh->comment);
                        }
                }
        }

        return True;
}

/****************************************************************************
  main program
****************************************************************************/
int main(int argc, char *argv[])
{
	TALLOC_CTX *frame = talloc_stackframe();
	const char **argv_const = discard_const_p(const char *, argv);
	struct user_auth_info *auth_info;
	struct poptOption long_options[] = {
		POPT_AUTOHELP
		{ "broadcast", 'b', POPT_ARG_VAL, &use_bcast, True, "Use broadcast instead of using the master browser" },
		{ "domains", 'D', POPT_ARG_VAL, &level, LEV_WORKGROUP, "List only domains (workgroups) of tree" },
		{ "servers", 'S', POPT_ARG_VAL, &level, LEV_SERVER, "List domains(workgroups) and servers of tree" },
		POPT_COMMON_SAMBA
		POPT_COMMON_CREDENTIALS
		POPT_TABLEEND
	};
	poptContext pc;

	/* Initialise samba stuff */
	smb_init_locale();

	setlinebuf(stdout);

	setup_logging(argv[0], DEBUG_STDERR);

	auth_info = user_auth_info_init(frame);
	if (auth_info == NULL) {
		exit(1);
	}
	popt_common_set_auth_info(auth_info);

	pc = poptGetContext("smbtree", argc, argv_const, long_options,
			    POPT_CONTEXT_KEEP_FIRST);
	while(poptGetNextOpt(pc) != -1);
	poptFreeContext(pc);
	popt_burn_cmdline_password(argc, argv);

	lp_load_global(get_dyn_CONFIGFILE());
	load_interfaces();

	/* Parse command line args */

	if (get_cmdline_auth_info_use_machine_account(auth_info) &&
	    !set_cmdline_auth_info_machine_account_creds(auth_info)) {
		TALLOC_FREE(frame);
		return 1;
	}

	set_cmdline_auth_info_getpass(auth_info);

	/* Now do our stuff */

        if (!print_tree(auth_info)) {
		TALLOC_FREE(frame);
                return 1;
	}

	TALLOC_FREE(frame);
	return 0;
}