/* * Unix SMB/CIFS implementation. * RPC Pipe client / server routines * Copyright (C) Andrew Tridgell 1992-1998, * Largely re-written : 2005 * Copyright (C) Jeremy Allison 1998 - 2005 * Copyright (C) Simo Sorce 2010 * Copyright (C) Andrew Bartlett 2011 * * 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 . */ #include "includes.h" #include "rpc_client/cli_pipe.h" #include "rpc_server/srv_pipe_internal.h" #include "rpc_dce.h" #include "../libcli/named_pipe_auth/npa_tstream.h" #include "rpc_server/rpc_ncacn_np.h" #include "librpc/gen_ndr/netlogon.h" #include "librpc/gen_ndr/auth.h" #include "../auth/auth_sam_reply.h" #include "auth.h" #include "rpc_server/rpc_pipes.h" #include "../lib/tsocket/tsocket.h" #include "../lib/util/tevent_ntstatus.h" #include "rpc_contexts.h" #include "rpc_server/rpc_config.h" #undef DBGC_CLASS #define DBGC_CLASS DBGC_RPC_SRV /**************************************************************************** Make an internal namedpipes structure ****************************************************************************/ struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *syntax, const struct tsocket_address *remote_address, const struct auth_session_info *session_info, struct messaging_context *msg_ctx) { struct pipes_struct *p; struct pipe_rpc_fns *context_fns; const char *pipe_name; int ret; pipe_name = get_pipe_name_from_syntax(talloc_tos(), syntax); DEBUG(4,("Create pipe requested %s\n", pipe_name)); ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name, NCALRPC, RPC_LITTLE_ENDIAN, false, remote_address, NULL, &p); if (ret) { DEBUG(0,("ERROR! no memory for pipes_struct!\n")); return NULL; } if (!init_pipe_handles(p, syntax)) { DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n")); TALLOC_FREE(p); return NULL; } p->session_info = copy_session_info(p, session_info); if (p->session_info == NULL) { DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n")); close_policy_by_pipe(p); TALLOC_FREE(p); return NULL; } context_fns = talloc(p, struct pipe_rpc_fns); if (context_fns == NULL) { DEBUG(0,("talloc() failed!\n")); TALLOC_FREE(p); return NULL; } context_fns->next = context_fns->prev = NULL; context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax); context_fns->cmds = rpc_srv_get_pipe_cmds(syntax); context_fns->context_id = 0; context_fns->syntax = *syntax; /* add to the list of open contexts */ DLIST_ADD(p->contexts, context_fns); DEBUG(4,("Created internal pipe %s\n", pipe_name)); return p; } static NTSTATUS rpcint_dispatch(struct pipes_struct *p, TALLOC_CTX *mem_ctx, uint32_t opnum, const DATA_BLOB *in_data, DATA_BLOB *out_data) { struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0); uint32_t num_cmds = fns->n_cmds; const struct api_struct *cmds = fns->cmds; uint32_t i; bool ok; /* set opnum */ p->opnum = opnum; for (i = 0; i < num_cmds; i++) { if (cmds[i].opnum == opnum && cmds[i].fn != NULL) { break; } } if (i == num_cmds) { return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE; } p->in_data.data = *in_data; p->out_data.rdata = data_blob_null; ok = cmds[i].fn(p); p->in_data.data = data_blob_null; if (!ok) { data_blob_free(&p->out_data.rdata); talloc_free_children(p->mem_ctx); return NT_STATUS_RPC_CALL_FAILED; } if (p->fault_state) { NTSTATUS status; status = NT_STATUS(p->fault_state); p->fault_state = 0; data_blob_free(&p->out_data.rdata); talloc_free_children(p->mem_ctx); return status; } *out_data = p->out_data.rdata; talloc_steal(mem_ctx, out_data->data); p->out_data.rdata = data_blob_null; talloc_free_children(p->mem_ctx); return NT_STATUS_OK; } struct rpcint_bh_state { struct pipes_struct *p; }; static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h) { struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h, struct rpcint_bh_state); if (!hs->p) { return false; } return true; } static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h, uint32_t timeout) { /* TODO: implement timeouts */ return UINT32_MAX; } struct rpcint_bh_raw_call_state { DATA_BLOB in_data; DATA_BLOB out_data; uint32_t out_flags; }; static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct dcerpc_binding_handle *h, const struct GUID *object, uint32_t opnum, uint32_t in_flags, const uint8_t *in_data, size_t in_length) { struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h, struct rpcint_bh_state); struct tevent_req *req; struct rpcint_bh_raw_call_state *state; bool ok; NTSTATUS status; req = tevent_req_create(mem_ctx, &state, struct rpcint_bh_raw_call_state); if (req == NULL) { return NULL; } state->in_data.data = discard_const_p(uint8_t, in_data); state->in_data.length = in_length; ok = rpcint_bh_is_connected(h); if (!ok) { tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED); return tevent_req_post(req, ev); } /* TODO: allow async */ status = rpcint_dispatch(hs->p, state, opnum, &state->in_data, &state->out_data); if (!NT_STATUS_IS_OK(status)) { tevent_req_nterror(req, status); return tevent_req_post(req, ev); } tevent_req_done(req); return tevent_req_post(req, ev); } static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, uint8_t **out_data, size_t *out_length, uint32_t *out_flags) { struct rpcint_bh_raw_call_state *state = tevent_req_data(req, struct rpcint_bh_raw_call_state); NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { tevent_req_received(req); return status; } *out_data = talloc_move(mem_ctx, &state->out_data.data); *out_length = state->out_data.length; *out_flags = 0; tevent_req_received(req); return NT_STATUS_OK; } struct rpcint_bh_disconnect_state { uint8_t _dummy; }; static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct dcerpc_binding_handle *h) { struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h, struct rpcint_bh_state); struct tevent_req *req; struct rpcint_bh_disconnect_state *state; bool ok; req = tevent_req_create(mem_ctx, &state, struct rpcint_bh_disconnect_state); if (req == NULL) { return NULL; } ok = rpcint_bh_is_connected(h); if (!ok) { tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED); return tevent_req_post(req, ev); } /* * TODO: do a real async disconnect ... * * For now the caller needs to free pipes_struct */ hs->p = NULL; tevent_req_done(req); return tevent_req_post(req, ev); } static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req) { NTSTATUS status; if (tevent_req_is_nterror(req, &status)) { tevent_req_received(req); return status; } tevent_req_received(req); return NT_STATUS_OK; } static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h) { return true; } static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h, int ndr_flags, const void *_struct_ptr, const struct ndr_interface_call *call) { void *struct_ptr = discard_const(_struct_ptr); if (DEBUGLEVEL < 11) { return; } if (ndr_flags & NDR_IN) { ndr_print_function_debug(call->ndr_print, call->name, ndr_flags, struct_ptr); } if (ndr_flags & NDR_OUT) { ndr_print_function_debug(call->ndr_print, call->name, ndr_flags, struct_ptr); } } static const struct dcerpc_binding_handle_ops rpcint_bh_ops = { .name = "rpcint", .is_connected = rpcint_bh_is_connected, .set_timeout = rpcint_bh_set_timeout, .raw_call_send = rpcint_bh_raw_call_send, .raw_call_recv = rpcint_bh_raw_call_recv, .disconnect_send = rpcint_bh_disconnect_send, .disconnect_recv = rpcint_bh_disconnect_recv, .ref_alloc = rpcint_bh_ref_alloc, .do_ndr_print = rpcint_bh_do_ndr_print, }; static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *abstract_syntax, const struct ndr_interface_table *ndr_table, const struct tsocket_address *remote_address, const struct auth_session_info *session_info, struct messaging_context *msg_ctx, struct dcerpc_binding_handle **binding_handle) { struct dcerpc_binding_handle *h; struct rpcint_bh_state *hs; if (ndr_table) { abstract_syntax = &ndr_table->syntax_id; } h = dcerpc_binding_handle_create(mem_ctx, &rpcint_bh_ops, NULL, ndr_table, &hs, struct rpcint_bh_state, __location__); if (h == NULL) { return NT_STATUS_NO_MEMORY; } hs->p = make_internal_rpc_pipe_p(hs, abstract_syntax, remote_address, session_info, msg_ctx); if (hs->p == NULL) { TALLOC_FREE(h); return NT_STATUS_NO_MEMORY; } *binding_handle = h; return NT_STATUS_OK; } /** * @brief Create a new DCERPC Binding Handle which uses a local dispatch function. * * @param[in] mem_ctx The memory context to use. * * @param[in] ndr_table Normally the ndr_table_. * * @param[in] remote_address The info about the connected client. * * @param[in] serversupplied_info The server supplied authentication function. * * @param[in] msg_ctx The messaging context that can be used by the server * * @param[out] binding_handle A pointer to store the connected * dcerpc_binding_handle * * @return NT_STATUS_OK on success, a corresponding NT status if an * error occured. * * @code * struct dcerpc_binding_handle *winreg_binding; * NTSTATUS status; * * status = rpcint_binding_handle(tmp_ctx, * &ndr_table_winreg, * p->remote_address, * p->session_info, * p->msg_ctx * &winreg_binding); * @endcode */ NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx, const struct ndr_interface_table *ndr_table, const struct tsocket_address *remote_address, const struct auth_session_info *session_info, struct messaging_context *msg_ctx, struct dcerpc_binding_handle **binding_handle) { return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, remote_address, session_info, msg_ctx, binding_handle); } /** * @internal * * @brief Create a new RPC client context which uses a local transport. * * This creates a local transport. It is a shortcut to directly call the server * functions and avoid marshalling. * NOTE: this function should be used only by rpc_pipe_open_interface() * * @param[in] mem_ctx The memory context to use. * * @param[in] abstract_syntax Normally the syntax_id of the autogenerated * ndr_table_. * * @param[in] serversupplied_info The server supplied authentication function. * * @param[in] remote_address The client address information. * * @param[in] msg_ctx The messaging context to use. * * @param[out] presult A pointer to store the connected rpc client pipe. * * @return NT_STATUS_OK on success, a corresponding NT status if an * error occured. */ NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx, const struct ndr_syntax_id *abstract_syntax, const struct auth_session_info *session_info, const struct tsocket_address *remote_address, struct messaging_context *msg_ctx, struct rpc_pipe_client **presult) { struct rpc_pipe_client *result; NTSTATUS status; result = talloc_zero(mem_ctx, struct rpc_pipe_client); if (result == NULL) { return NT_STATUS_NO_MEMORY; } result->abstract_syntax = *abstract_syntax; result->transfer_syntax = ndr_transfer_syntax_ndr; if (remote_address == NULL) { struct tsocket_address *local; int rc; rc = tsocket_address_inet_from_strings(mem_ctx, "ip", "127.0.0.1", 0, &local); if (rc < 0) { TALLOC_FREE(result); return NT_STATUS_NO_MEMORY; } remote_address = local; } result->max_xmit_frag = -1; result->max_recv_frag = -1; status = rpcint_binding_handle_ex(result, abstract_syntax, NULL, remote_address, session_info, msg_ctx, &result->binding_handle); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(result); return status; } *presult = result; return NT_STATUS_OK; } /**************************************************************************** * External pipes functions ***************************************************************************/ struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx, const char *pipe_name, const struct tsocket_address *local_address, const struct tsocket_address *remote_address, const struct auth_session_info *session_info) { struct np_proxy_state *result; char *socket_np_dir; const char *socket_dir; struct tevent_context *ev; struct tevent_req *subreq; struct auth_session_info_transport *session_info_t; bool ok; int ret; int sys_errno; result = talloc(mem_ctx, struct np_proxy_state); if (result == NULL) { DEBUG(0, ("talloc failed\n")); return NULL; } result->read_queue = tevent_queue_create(result, "np_read"); if (result->read_queue == NULL) { DEBUG(0, ("tevent_queue_create failed\n")); goto fail; } result->write_queue = tevent_queue_create(result, "np_write"); if (result->write_queue == NULL) { DEBUG(0, ("tevent_queue_create failed\n")); goto fail; } ev = s3_tevent_context_init(talloc_tos()); if (ev == NULL) { DEBUG(0, ("s3_tevent_context_init failed\n")); goto fail; } socket_dir = lp_parm_const_string( GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir", lp_ncalrpc_dir()); if (socket_dir == NULL) { DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n")); goto fail; } socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir); if (socket_np_dir == NULL) { DEBUG(0, ("talloc_asprintf failed\n")); goto fail; } session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport); if (session_info_t == NULL) { DEBUG(0, ("talloc failed\n")); goto fail; } session_info_t->session_info = copy_session_info(session_info_t, session_info); if (session_info_t->session_info == NULL) { DEBUG(0, ("copy_session_info failed\n")); goto fail; } become_root(); subreq = tstream_npa_connect_send(talloc_tos(), ev, socket_np_dir, pipe_name, remote_address, /* client_addr */ NULL, /* client_name */ local_address, /* server_addr */ NULL, /* server_name */ session_info_t); if (subreq == NULL) { unbecome_root(); DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and " "user %s\\%s failed\n", socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name, session_info_t->session_info->info->account_name)); goto fail; } ok = tevent_req_poll(subreq, ev); unbecome_root(); if (!ok) { DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s " "failed for tstream_npa_connect: %s\n", socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name, session_info_t->session_info->info->account_name, strerror(errno))); goto fail; } ret = tstream_npa_connect_recv(subreq, &sys_errno, result, &result->npipe, &result->file_type, &result->device_state, &result->allocation_size); TALLOC_FREE(subreq); if (ret != 0) { int l = 1; if (errno == ENOENT) { l = 2; } DEBUG(l, ("tstream_npa_connect_recv to %s for pipe %s and " "user %s\\%s failed: %s\n", socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name, session_info_t->session_info->info->account_name, strerror(sys_errno))); goto fail; } return result; fail: TALLOC_FREE(result); return NULL; } static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx, const char *pipe_name, const struct ndr_syntax_id *abstract_syntax, const struct auth_session_info *session_info, struct rpc_pipe_client **_result) { struct tsocket_address *local, *remote; struct rpc_pipe_client *result = NULL; struct np_proxy_state *proxy_state = NULL; struct pipe_auth_data *auth; NTSTATUS status; int ret; /* this is an internal connection, fake up ip addresses */ ret = tsocket_address_inet_from_strings(talloc_tos(), "ip", NULL, 0, &local); if (ret) { return NT_STATUS_NO_MEMORY; } ret = tsocket_address_inet_from_strings(talloc_tos(), "ip", NULL, 0, &remote); if (ret) { return NT_STATUS_NO_MEMORY; } proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name, local, remote, session_info); if (!proxy_state) { return NT_STATUS_UNSUCCESSFUL; } result = talloc_zero(mem_ctx, struct rpc_pipe_client); if (result == NULL) { status = NT_STATUS_NO_MEMORY; goto done; } result->abstract_syntax = *abstract_syntax; result->transfer_syntax = ndr_transfer_syntax_ndr; result->desthost = get_myname(result); result->srv_name_slash = talloc_asprintf_strupper_m( result, "\\\\%s", result->desthost); if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) { status = NT_STATUS_NO_MEMORY; goto done; } result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN; result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN; status = rpc_transport_tstream_init(result, &proxy_state->npipe, &result->transport); if (!NT_STATUS_IS_OK(status)) { goto done; } result->binding_handle = rpccli_bh_create(result); if (result->binding_handle == NULL) { status = NT_STATUS_NO_MEMORY; DEBUG(0, ("Failed to create binding handle.\n")); goto done; } result->auth = talloc_zero(result, struct pipe_auth_data); if (!result->auth) { status = NT_STATUS_NO_MEMORY; goto done; } result->auth->auth_type = DCERPC_AUTH_TYPE_NONE; result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE; status = rpccli_anon_bind_data(result, &auth); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("Failed to initialize anonymous bind.\n")); goto done; } status = rpc_pipe_bind(result, auth); if (!NT_STATUS_IS_OK(status)) { DEBUG(0, ("Failed to bind external pipe.\n")); goto done; } done: if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(result); } TALLOC_FREE(proxy_state); *_result = result; return status; } /** * @brief Create a new RPC client context which uses a local dispatch function * or a remote transport, depending on rpc_server configuration for the * specific service. * * @param[in] mem_ctx The memory context to use. * * @param[in] abstract_syntax Normally the syntax_id of the autogenerated * ndr_table_. * * @param[in] serversupplied_info The server supplied authentication function. * * @param[in] remote_address The client address information. * * @param[in] msg_ctx The messaging context to use. * * @param[out] presult A pointer to store the connected rpc client pipe. * * @return NT_STATUS_OK on success, a corresponding NT status if an * error occured. * * @code * struct rpc_pipe_client *winreg_pipe; * NTSTATUS status; * * status = rpc_pipe_open_interface(tmp_ctx, * &ndr_table_winreg.syntax_id, * p->session_info, * remote_address, * &winreg_pipe); * @endcode */ NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx, const struct ndr_interface_table *table, const struct auth_session_info *session_info, const struct tsocket_address *remote_address, struct messaging_context *msg_ctx, struct rpc_pipe_client **cli_pipe) { struct rpc_pipe_client *cli = NULL; enum rpc_service_mode_e pipe_mode; const char *pipe_name; NTSTATUS status; TALLOC_CTX *tmp_ctx; if (cli_pipe != NULL) { if (rpccli_is_connected(*cli_pipe)) { return NT_STATUS_OK; } else { TALLOC_FREE(*cli_pipe); } } tmp_ctx = talloc_stackframe(); if (tmp_ctx == NULL) { return NT_STATUS_NO_MEMORY; } pipe_name = get_pipe_name_from_syntax(tmp_ctx, &table->syntax_id); if (pipe_name == NULL) { status = NT_STATUS_INVALID_PARAMETER; goto done; } while (pipe_name[0] == '\\') { pipe_name++; } DEBUG(5, ("Connecting to %s pipe.\n", pipe_name)); pipe_mode = rpc_service_mode(pipe_name); switch (pipe_mode) { case RPC_SERVICE_MODE_EMBEDDED: status = rpc_pipe_open_internal(tmp_ctx, &table->syntax_id, session_info, remote_address, msg_ctx, &cli); if (!NT_STATUS_IS_OK(status)) { goto done; } break; case RPC_SERVICE_MODE_EXTERNAL: /* It would be nice to just use rpc_pipe_open_ncalrpc() but * for now we need to use the special proxy setup to connect * to spoolssd. */ status = rpc_pipe_open_external(tmp_ctx, pipe_name, &table->syntax_id, session_info, &cli); if (!NT_STATUS_IS_OK(status)) { goto done; } break; case RPC_SERVICE_MODE_DISABLED: status = NT_STATUS_NOT_IMPLEMENTED; DEBUG(0, ("Service pipe %s is disabled in config file: %s", pipe_name, nt_errstr(status))); goto done; } status = NT_STATUS_OK; done: if (NT_STATUS_IS_OK(status) && cli_pipe != NULL) { *cli_pipe = talloc_move(mem_ctx, &cli); } TALLOC_FREE(tmp_ctx); return status; }