/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2010 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * * Copyright 2013 Nexenta Systems, Inc. All rights reserved. */ #include /* * The echo request is used to test the connection to the server, * and to see if the server is still responding. The tid is ignored, * so this request may be sent to the server even if there are no * tree connections to the server. * * Each response echoes the data sent, though ByteCount may indicate * no data. If echo-count is zero, no response is sent. */ smb_sdrc_t smb_pre_echo(smb_request_t *sr) { DTRACE_SMB_1(op__Echo__start, smb_request_t *, sr); return (SDRC_SUCCESS); } void smb_post_echo(smb_request_t *sr) { DTRACE_SMB_1(op__Echo__done, smb_request_t *, sr); } static unsigned short smb_max_echo = 10; smb_sdrc_t smb_com_echo(struct smb_request *sr) { unsigned short necho; unsigned short nbytes; unsigned short i; struct mbuf_chain reply; char *data; uint16_t pid_hi, pid_lo; pid_hi = sr->smb_pid >> 16; pid_lo = (uint16_t)sr->smb_pid; if (smbsr_decode_vwv(sr, "w", &necho) != 0) return (SDRC_ERROR); /* * Don't let the client fool us into doing * more work than is "reasonable". */ if (necho > smb_max_echo) necho = smb_max_echo; nbytes = sr->smb_bcc; data = smb_srm_zalloc(sr, nbytes); if (smb_mbc_decodef(&sr->smb_data, "#c", nbytes, data)) return (SDRC_ERROR); for (i = 1; i <= necho; ++i) { /* * According to [MS-CIFS] 3.3.5.32 echo is * subject to cancellation. */ if (sr->sr_state != SMB_REQ_STATE_ACTIVE) break; MBC_INIT(&reply, SMB_HEADER_ED_LEN + 10 + nbytes); (void) smb_mbc_encodef(&reply, SMB_HEADER_ED_FMT, sr->first_smb_com, sr->smb_rcls, sr->smb_reh, sr->smb_err, sr->smb_flg | SMB_FLAGS_REPLY, sr->smb_flg2, pid_hi, sr->smb_sig, sr->smb_tid, pid_lo, sr->smb_uid, sr->smb_mid); (void) smb_mbc_encodef(&reply, "bww#c", 1, i, nbytes, nbytes, data); if (sr->session->signing.flags & SMB_SIGNING_ENABLED) smb_sign_reply(sr, &reply); (void) smb_session_send(sr->session, 0, &reply); delay(MSEC_TO_TICK(100)); } return (SDRC_NO_REPLY); }