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7c26512b6d
We usually don't do "goto post_status;" anymore Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
369 lines
8.5 KiB
C
369 lines
8.5 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* RPC Pipe client / server routines
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* Copyright (C) Andrew Tridgell 1992-1998,
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* Largely re-written : 2005
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* Copyright (C) Jeremy Allison 1998 - 2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "fake_file.h"
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#include "rpc_dce.h"
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#include "ntdomain.h"
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#include "rpc_server/rpc_ncacn_np.h"
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#include "rpc_server/srv_pipe_hnd.h"
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#include "rpc_client/local_np.h"
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#include "rpc_server/rpc_server.h"
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#include "rpc_server/rpc_config.h"
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#include "../lib/tsocket/tsocket.h"
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#include "../lib/util/tevent_ntstatus.h"
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#include "librpc/ndr/ndr_table.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_RPC_SRV
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bool fsp_is_np(struct files_struct *fsp)
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{
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enum FAKE_FILE_TYPE type;
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if ((fsp == NULL) || (fsp->fake_file_handle == NULL)) {
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return false;
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}
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type = fsp->fake_file_handle->type;
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return (type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY);
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}
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NTSTATUS np_open(TALLOC_CTX *mem_ctx, const char *name,
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const struct tsocket_address *remote_client_address,
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const struct tsocket_address *local_server_address,
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struct auth_session_info *session_info,
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struct tevent_context *ev_ctx,
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struct messaging_context *msg_ctx,
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struct dcesrv_context *dce_ctx,
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struct fake_file_handle **phandle)
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{
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struct fake_file_handle *handle;
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struct npa_state *npa = NULL;
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int ret;
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handle = talloc(mem_ctx, struct fake_file_handle);
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if (handle == NULL) {
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return NT_STATUS_NO_MEMORY;
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}
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npa = npa_state_init(handle);
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if (npa == NULL) {
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TALLOC_FREE(handle);
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return NT_STATUS_NO_MEMORY;
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}
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*handle = (struct fake_file_handle) {
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.type = FAKE_FILE_TYPE_NAMED_PIPE_PROXY,
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.private_data = npa,
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};
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ret = local_np_connect(
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name,
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NCACN_NP,
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NULL,
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remote_client_address,
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NULL,
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local_server_address,
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session_info,
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false,
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npa,
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&npa->stream);
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if (ret != 0) {
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DBG_DEBUG("local_np_connect failed: %s\n",
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strerror(ret));
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TALLOC_FREE(handle);
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return map_nt_error_from_unix(ret);
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}
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*phandle = handle;
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return NT_STATUS_OK;
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}
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bool np_read_in_progress(struct fake_file_handle *handle)
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{
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if (handle->type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY) {
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struct npa_state *p =
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talloc_get_type_abort(handle->private_data,
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struct npa_state);
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size_t read_count;
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read_count = tevent_queue_length(p->read_queue);
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if (read_count > 0) {
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return true;
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}
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return false;
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}
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return false;
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}
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struct np_write_state {
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struct tevent_context *ev;
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struct npa_state *p;
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struct iovec iov;
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ssize_t nwritten;
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};
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static void np_write_done(struct tevent_req *subreq);
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struct tevent_req *np_write_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
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struct fake_file_handle *handle,
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const uint8_t *data, size_t len)
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{
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struct tevent_req *req;
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struct np_write_state *state;
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struct npa_state *p = NULL;
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struct tevent_req *subreq = NULL;
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DBG_INFO("len: %zu\n", len);
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dump_data(50, data, len);
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req = tevent_req_create(mem_ctx, &state, struct np_write_state);
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if (req == NULL) {
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return NULL;
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}
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if (handle->type != FAKE_FILE_TYPE_NAMED_PIPE_PROXY) {
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tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
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return tevent_req_post(req, ev);
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}
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if (len == 0) {
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state->nwritten = 0;
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tevent_req_done(req);
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return tevent_req_post(req, ev);
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}
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p = talloc_get_type_abort(handle->private_data, struct npa_state);
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state->ev = ev;
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state->p = p;
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state->iov.iov_base = discard_const_p(void, data);
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state->iov.iov_len = len;
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subreq = tstream_writev_queue_send(
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state, ev, p->stream, p->write_queue, &state->iov, 1);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, np_write_done, req);
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return req;
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}
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static void np_write_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct np_write_state *state = tevent_req_data(
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req, struct np_write_state);
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ssize_t received;
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int err;
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received = tstream_writev_queue_recv(subreq, &err);
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if (received < 0) {
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tevent_req_nterror(req, map_nt_error_from_unix(err));
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return;
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}
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state->nwritten = received;
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tevent_req_done(req);
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}
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NTSTATUS np_write_recv(struct tevent_req *req, ssize_t *pnwritten)
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{
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struct np_write_state *state = tevent_req_data(
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req, struct np_write_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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return status;
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}
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*pnwritten = state->nwritten;
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return NT_STATUS_OK;
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}
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struct np_ipc_readv_next_vector_state {
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uint8_t *buf;
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size_t len;
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off_t ofs;
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size_t remaining;
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};
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static void np_ipc_readv_next_vector_init(struct np_ipc_readv_next_vector_state *s,
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uint8_t *buf, size_t len)
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{
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ZERO_STRUCTP(s);
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s->buf = buf;
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s->len = MIN(len, UINT16_MAX);
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}
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static int np_ipc_readv_next_vector(struct tstream_context *stream,
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void *private_data,
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TALLOC_CTX *mem_ctx,
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struct iovec **_vector,
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size_t *count)
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{
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struct np_ipc_readv_next_vector_state *state =
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(struct np_ipc_readv_next_vector_state *)private_data;
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struct iovec *vector;
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ssize_t pending;
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size_t wanted;
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if (state->ofs == state->len) {
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*_vector = NULL;
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*count = 0;
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return 0;
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}
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pending = tstream_pending_bytes(stream);
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if (pending == -1) {
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return -1;
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}
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if (pending == 0 && state->ofs != 0) {
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/* return a short read */
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*_vector = NULL;
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*count = 0;
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return 0;
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}
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if (pending == 0) {
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/* we want at least one byte and recheck again */
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wanted = 1;
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} else {
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size_t missing = state->len - state->ofs;
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if (pending > missing) {
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/* there's more available */
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state->remaining = pending - missing;
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wanted = missing;
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} else {
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/* read what we can get and recheck in the next cycle */
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wanted = pending;
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}
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}
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vector = talloc_array(mem_ctx, struct iovec, 1);
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if (!vector) {
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return -1;
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}
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vector[0].iov_base = state->buf + state->ofs;
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vector[0].iov_len = wanted;
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state->ofs += wanted;
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*_vector = vector;
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*count = 1;
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return 0;
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}
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struct np_read_state {
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struct npa_state *p;
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struct np_ipc_readv_next_vector_state next_vector;
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ssize_t nread;
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bool is_data_outstanding;
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};
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static void np_read_done(struct tevent_req *subreq);
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struct tevent_req *np_read_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
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struct fake_file_handle *handle,
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uint8_t *data, size_t len)
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{
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struct tevent_req *req;
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struct np_read_state *state;
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struct npa_state *p = NULL;
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struct tevent_req *subreq = NULL;
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req = tevent_req_create(mem_ctx, &state, struct np_read_state);
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if (req == NULL) {
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return NULL;
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}
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if (handle->type != FAKE_FILE_TYPE_NAMED_PIPE_PROXY) {
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tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
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return tevent_req_post(req, ev);
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}
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p = talloc_get_type_abort(handle->private_data, struct npa_state);
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np_ipc_readv_next_vector_init(&state->next_vector, data, len);
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subreq = tstream_readv_pdu_queue_send(
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state,
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ev,
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p->stream,
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p->read_queue,
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np_ipc_readv_next_vector,
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&state->next_vector);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, np_read_done, req);
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return req;
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}
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static void np_read_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct np_read_state *state = tevent_req_data(
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req, struct np_read_state);
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ssize_t ret;
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int err;
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ret = tstream_readv_pdu_queue_recv(subreq, &err);
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TALLOC_FREE(subreq);
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if (ret == -1) {
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tevent_req_nterror(req, map_nt_error_from_unix(err));
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return;
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}
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state->nread = ret;
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state->is_data_outstanding = (state->next_vector.remaining > 0);
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tevent_req_done(req);
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return;
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}
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NTSTATUS np_read_recv(struct tevent_req *req, ssize_t *nread,
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bool *is_data_outstanding)
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{
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struct np_read_state *state = tevent_req_data(
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req, struct np_read_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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return status;
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}
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DEBUG(10, ("Received %d bytes. There is %smore data outstanding\n",
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(int)state->nread, state->is_data_outstanding?"":"no "));
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*nread = state->nread;
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*is_data_outstanding = state->is_data_outstanding;
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return NT_STATUS_OK;
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}
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