/* Unix SMB/Netbios implementation. Version 1.9. SMB client generic functions Copyright (C) Andrew Tridgell 1994-2000 Copyright (C) Luke Kenneth Casson Leighton 1996-2000 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. */ #define NO_SYSLOG #include "includes.h" #include "rpc_parse.h" static struct cli_connection **con_list = NULL; static uint32 num_cons = 0; struct user_creds *usr_creds = NULL; vuser_key *user_key = NULL; extern int DEBUGLEVEL; extern pstring global_myname; /* * needed for the struct cli_connection * none of these functions are implemented in HEAD currently * rpc_client/cli_connect.c for details * * the 'typedef struct _cli_auth_fns cli_auth_fns;' is in * rpc_misc.h */ struct _cli_auth_fns { /* these three will do for now. they *should* match with server-side */ BOOL (*create_bind_req) (struct cli_connection *, prs_struct *, uint32, RPC_IFACE *, RPC_IFACE *); BOOL (*decode_bind_resp) (struct cli_connection *, prs_struct *); BOOL (*create_bind_cont) (struct cli_connection *, prs_struct *, uint32); /* creates an authenticated PDU */ BOOL (*cli_create_pdu) (struct cli_connection *, uint8, prs_struct *, int, int *, prs_struct *, uint8 *); /* decodes an authenticated PDU */ BOOL (*cli_decode_pdu) (struct cli_connection *, prs_struct *, int, int); }; cli_auth_fns cli_noauth_fns = { NULL, NULL, NULL, NULL, NULL }; void init_connections(void) { con_list = NULL; num_cons = 0; init_cli_use(); } static void free_con_array(uint32 num_entries, struct cli_connection **entries) { void (*fn) (void *) = (void (*)(void *))&cli_connection_free; free_void_array(num_entries, (void **)entries, *fn); } static struct cli_connection *add_con_to_array(uint32 * len, struct cli_connection ***array, struct cli_connection *con) { return (struct cli_connection *)add_item_to_array(len, (void ***)array, (void *)con); } void free_connections(void) { DEBUG(3, ("free_connections: closing all MSRPC connections\n")); free_con_array(num_cons, con_list); free_cli_use(); init_connections(); } static struct cli_connection *cli_con_get(const char *srv_name, char *pipe_name, cli_auth_fns * auth, void *auth_creds, BOOL reuse) { struct cli_connection *con = NULL; BOOL is_new_connection = False; CREDS_NT usr; struct ntuser_creds *ntc = NULL; struct ncacn_np *pNcacn; /* * initialization stuff */ con = (struct cli_connection *)malloc(sizeof(*con)); if (con == NULL) { return NULL; } memset(con, 0, sizeof(*con)); copy_user_creds(&con->usr_creds, NULL); con->usr_creds.reuse = reuse; if (srv_name != NULL) { con->srv_name = strdup(srv_name); } if (pipe_name != NULL) { con->pipe_name = strdup(pipe_name); } if (usr_creds != NULL) { ntc = &usr_creds->ntc; } /* fix me XXXX **WHAT** a hack. The cli_state* is malloc'd deep within the call stack, so we can grab that pointer. ncacn_np* is stored in an array which is currently handled by underlying systems. --jerry */ pNcacn = ncacn_np_use_add(pipe_name, user_key, srv_name, ntc, reuse, &is_new_connection); if (pNcacn == NULL) return NULL; con->pCli_state = pNcacn->smb; if (con->pCli_state == NULL) return NULL; con->pCli_state->key.pid = 0; con->pCli_state->key.vuid = UID_FIELD_INVALID; create_ntc_from_cli_state ( &usr, con->pCli_state ); copy_nt_creds(&con->usr_creds.ntc, &usr); if (is_new_connection) { con->auth_info = NULL; con->auth_creds = auth_creds; if (auth != NULL) { con->auth = auth; } else { con->auth = &cli_noauth_fns; } if (!rpc_pipe_bind(con->pCli_state, pipe_name, global_myname)) { DEBUG(0, ("rpc_pipe_bind failed\n")); cli_connection_free(con); return NULL; } } else { con->auth_info = cli_conn_get_auth_creds(con); con->auth = cli_conn_get_authfns(con); if (con->auth_info != NULL) { DEBUG(1,("cli_con_get: TODO: auth reuse\n")); cli_connection_free(con); return NULL; } else { con->auth = &cli_noauth_fns; } } add_con_to_array(&num_cons, &con_list, con); return con; } /**************************************************************************** terminate client connection ****************************************************************************/ void cli_connection_free(struct cli_connection *con) { BOOL closed = False; struct cli_state *oldcli = NULL; int i; DEBUG(10, ("cli_connection_free: %d\n", __LINE__)); if (con->pCli_state != NULL) { DEBUG(10, ("msrpc smb connection\n")); ncacn_np_use_del(con->srv_name, con->pipe_name, &con->pCli_state->key, False, &closed); oldcli = con->pCli_state; con->pCli_state = NULL; } DEBUG(10, ("cli_connection_free: closed: %s\n", BOOLSTR(closed))); if (closed) { for (i = 0; i < num_cons; i++) { struct cli_connection *c = con_list[i]; if (c != NULL && con != c && c->pCli_state == oldcli) { /* WHOOPS! fnum already open: too bad!!! get rid of all other connections that were using that connection */ c->pCli_state = NULL; } } } /* don't free the cli_state since it is being handled by the *clis list in rpc_client/cli_use.c. This code needs to be fixed badly. It is **way** to complicated. --jerry */ /* if (oldcli != NULL) { free(oldcli); } */ if (con->srv_name != NULL) { free(con->srv_name); con->srv_name = NULL; } if (con->pipe_name != NULL) { free(con->pipe_name); con->pipe_name = NULL; } if (con->auth_info != NULL) { free(con->auth_info); con->auth_info = NULL; } memset(&con->usr_creds, 0, sizeof(con->usr_creds)); for (i = 0; i < num_cons; i++) { if (con == con_list[i]) { con_list[i] = NULL; } } free(con); } void cli_connection_unlink(struct cli_connection *con) { if (con != NULL) { cli_connection_free(con); } return; } /**************************************************************************** init client state ****************************************************************************/ BOOL cli_connection_init(const char *srv_name, char *pipe_name, struct cli_connection **con) { return cli_connection_init_auth(srv_name, pipe_name, con, NULL, NULL); } /**************************************************************************** init client state ****************************************************************************/ BOOL cli_connection_init_auth(const char *srv_name, char *pipe_name, struct cli_connection **con, cli_auth_fns * auth, void *auth_creds) { BOOL reuse = True; /* * allocate */ DEBUG(10, ("cli_connection_init_auth: %s %s\n", srv_name != NULL ? srv_name : "<null>", pipe_name)); *con = cli_con_get(srv_name, pipe_name, auth, auth_creds, reuse); return (*con) != NULL; } /**************************************************************************** get auth functions associated with an msrpc session. ****************************************************************************/ struct _cli_auth_fns *cli_conn_get_authfns(struct cli_connection *con) { return con != NULL ? con->auth : NULL; } /**************************************************************************** get auth info associated with an msrpc session. ****************************************************************************/ void *cli_conn_get_auth_creds(struct cli_connection *con) { return con != NULL ? con->auth_creds : NULL; } /**************************************************************************** send a request on an rpc pipe. ****************************************************************************/ BOOL rpc_hnd_pipe_req(const POLICY_HND * hnd, uint8 op_num, prs_struct * data, prs_struct * rdata) { struct cli_connection *con = NULL; /* we need this to locate the cli_connection associated with the POLICY_HND */ if ((con=RpcHndList_get_connection(hnd)) == NULL) return False; if (!rpc_con_ok(con)) return False; return rpc_con_pipe_req(con, op_num, data, rdata); } /**************************************************************************** send a request on an rpc pipe. ****************************************************************************/ BOOL rpc_con_pipe_req(struct cli_connection *con, uint8 op_num, prs_struct * data, prs_struct * rdata) { BOOL ret; DEBUG(10, ("rpc_con_pipe_req: op_num %d offset %d used: %d\n", op_num, data->data_offset, data->buffer_size)); prs_dump("in_rpcclient", (int)op_num, data); /* Why does this use prs->data_offset? --jerry */ /* prs_realloc_data(data, data->data_offset); */ ret = rpc_api_pipe_req(con->pCli_state, op_num, data, rdata); prs_dump("out_rpcclient", (int)op_num, rdata); return ret; } /**************************************************************************** this allows us to detect dead servers. The cli->fd is set to -1 when we get an error *****************************************************************************/ BOOL rpc_con_ok(struct cli_connection *con) { if (!con) return False; if (!con->pCli_state) return False; if (con->pCli_state->fd == -1) return False; return True; }