1/* 2 Unix SMB/CIFS implementation. 3 4 SMB2 client read call 5 6 Copyright (C) Andrew Tridgell 2005 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. 20*/ 21 22#include "includes.h" 23#include "libcli/smb2/smb2.h" 24#include "libcli/smb2/smb2_calls.h" 25 26/* 27 send a read request 28*/ 29struct smb2_request *smb2_read_send(struct smb2_tree *tree, struct smb2_read *io) 30{ 31 struct smb2_request *req; 32 33 req = smb2_request_init_tree(tree, SMB2_OP_READ, 0x30, true, 0); 34 if (req == NULL) return NULL; 35 36 SCVAL(req->out.body, 0x02, 0); /* pad */ 37 SCVAL(req->out.body, 0x03, 0); /* reserved */ 38 SIVAL(req->out.body, 0x04, io->in.length); 39 SBVAL(req->out.body, 0x08, io->in.offset); 40 smb2_push_handle(req->out.body+0x10, &io->in.file.handle); 41 SIVAL(req->out.body, 0x20, io->in.min_count); 42 SIVAL(req->out.body, 0x24, io->in.channel); 43 SIVAL(req->out.body, 0x28, io->in.remaining); 44 SSVAL(req->out.body, 0x2C, io->in.channel_offset); 45 SSVAL(req->out.body, 0x2E, io->in.channel_length); 46 47 smb2_transport_send(req); 48 49 return req; 50} 51 52 53/* 54 recv a read reply 55*/ 56NTSTATUS smb2_read_recv(struct smb2_request *req, 57 TALLOC_CTX *mem_ctx, struct smb2_read *io) 58{ 59 NTSTATUS status; 60 61 if (!smb2_request_receive(req) || 62 !smb2_request_is_ok(req)) { 63 return smb2_request_destroy(req); 64 } 65 66 SMB2_CHECK_PACKET_RECV(req, 0x10, true); 67 68 status = smb2_pull_o16s32_blob(&req->in, mem_ctx, req->in.body+0x02, &io->out.data); 69 if (!NT_STATUS_IS_OK(status)) { 70 smb2_request_destroy(req); 71 return status; 72 } 73 74 io->out.remaining = IVAL(req->in.body, 0x08); 75 io->out.reserved = IVAL(req->in.body, 0x0C); 76 77 return smb2_request_destroy(req); 78} 79 80/* 81 sync read request 82*/ 83NTSTATUS smb2_read(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_read *io) 84{ 85 struct smb2_request *req = smb2_read_send(tree, io); 86 return smb2_read_recv(req, mem_ctx, io); 87} 88