1da6c28aaSamw /* 2da6c28aaSamw * CDDL HEADER START 3da6c28aaSamw * 4da6c28aaSamw * The contents of this file are subject to the terms of the 5da6c28aaSamw * Common Development and Distribution License (the "License"). 6da6c28aaSamw * You may not use this file except in compliance with the License. 7da6c28aaSamw * 8da6c28aaSamw * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9da6c28aaSamw * or http://www.opensolaris.org/os/licensing. 10da6c28aaSamw * See the License for the specific language governing permissions 11da6c28aaSamw * and limitations under the License. 12da6c28aaSamw * 13da6c28aaSamw * When distributing Covered Code, include this CDDL HEADER in each 14da6c28aaSamw * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15da6c28aaSamw * If applicable, add the following below this CDDL HEADER, with the 16da6c28aaSamw * fields enclosed by brackets "[]" replaced with your own identifying 17da6c28aaSamw * information: Portions Copyright [yyyy] [name of copyright owner] 18da6c28aaSamw * 19da6c28aaSamw * CDDL HEADER END 20da6c28aaSamw */ 21da6c28aaSamw /* 229fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23da6c28aaSamw * Use is subject to license terms. 24da6c28aaSamw */ 25da6c28aaSamw 26bbf6f00cSJordan Brown #include <smbsrv/smb_kproto.h> 27da6c28aaSamw 28da6c28aaSamw /* 29da6c28aaSamw * The echo request is used to test the connection to the server, 30da6c28aaSamw * and to see if the server is still responding. The tid is ignored, 31da6c28aaSamw * so this request may be sent to the server even if there are no 32da6c28aaSamw * tree connections to the server. 33da6c28aaSamw * 34da6c28aaSamw * Each response echoes the data sent, though ByteCount may indicate 35da6c28aaSamw * no data. If echo-count is zero, no response is sent. 36da6c28aaSamw */ 37faa1795aSjb smb_sdrc_t 38faa1795aSjb smb_pre_echo(smb_request_t *sr) 39faa1795aSjb { 40faa1795aSjb DTRACE_SMB_1(op__Echo__start, smb_request_t *, sr); 41faa1795aSjb return (SDRC_SUCCESS); 42faa1795aSjb } 43faa1795aSjb 44faa1795aSjb void 45faa1795aSjb smb_post_echo(smb_request_t *sr) 46faa1795aSjb { 47faa1795aSjb DTRACE_SMB_1(op__Echo__done, smb_request_t *, sr); 48faa1795aSjb } 49faa1795aSjb 50*7f3ef643SGordon Ross static unsigned short smb_max_echo = 10; 51*7f3ef643SGordon Ross 527b59d02dSjb smb_sdrc_t 53da6c28aaSamw smb_com_echo(struct smb_request *sr) 54da6c28aaSamw { 55da6c28aaSamw unsigned short necho; 56da6c28aaSamw unsigned short nbytes; 57da6c28aaSamw unsigned short i; 58da6c28aaSamw struct mbuf_chain reply; 59da6c28aaSamw char *data; 60da6c28aaSamw 617b59d02dSjb if (smbsr_decode_vwv(sr, "w", &necho) != 0) 62faa1795aSjb return (SDRC_ERROR); 63da6c28aaSamw 64*7f3ef643SGordon Ross /* 65*7f3ef643SGordon Ross * Don't let the client fool us into doing 66*7f3ef643SGordon Ross * more work than is "reasonable". 67*7f3ef643SGordon Ross */ 68*7f3ef643SGordon Ross if (necho > smb_max_echo) 69*7f3ef643SGordon Ross necho = smb_max_echo; 70*7f3ef643SGordon Ross 71da6c28aaSamw nbytes = sr->smb_bcc; 729fb67ea3Safshin salek ardakani - Sun Microsystems - Irvine United States data = smb_srm_zalloc(sr, nbytes); 73da6c28aaSamw 743db3f65cSamw if (smb_mbc_decodef(&sr->smb_data, "#c", nbytes, data)) 75faa1795aSjb return (SDRC_ERROR); 76da6c28aaSamw 77da6c28aaSamw for (i = 1; i <= necho; ++i) { 78*7f3ef643SGordon Ross 79*7f3ef643SGordon Ross /* 80*7f3ef643SGordon Ross * According to [MS-CIFS] 3.3.5.32 echo is 81*7f3ef643SGordon Ross * subject to cancellation. 82*7f3ef643SGordon Ross */ 83*7f3ef643SGordon Ross if (sr->sr_state != SMB_REQ_STATE_ACTIVE) 84*7f3ef643SGordon Ross break; 85*7f3ef643SGordon Ross 86da6c28aaSamw MBC_INIT(&reply, SMB_HEADER_ED_LEN + 10 + nbytes); 87da6c28aaSamw 883db3f65cSamw (void) smb_mbc_encodef(&reply, SMB_HEADER_ED_FMT, 89da6c28aaSamw sr->first_smb_com, 90da6c28aaSamw sr->smb_rcls, 91da6c28aaSamw sr->smb_reh, 92da6c28aaSamw sr->smb_err, 93da6c28aaSamw sr->smb_flg | SMB_FLAGS_REPLY, 94da6c28aaSamw sr->smb_flg2, 95da6c28aaSamw sr->smb_pid_high, 96da6c28aaSamw sr->smb_sig, 97da6c28aaSamw sr->smb_tid, 98da6c28aaSamw sr->smb_pid, 99da6c28aaSamw sr->smb_uid, 100da6c28aaSamw sr->smb_mid); 101da6c28aaSamw 1023db3f65cSamw (void) smb_mbc_encodef(&reply, "bww#c", 1, i, 103da6c28aaSamw nbytes, nbytes, data); 104da6c28aaSamw 105da6c28aaSamw if (sr->session->signing.flags & SMB_SIGNING_ENABLED) 106da6c28aaSamw smb_sign_reply(sr, &reply); 107da6c28aaSamw 108da6c28aaSamw (void) smb_session_send(sr->session, 0, &reply); 109*7f3ef643SGordon Ross 110*7f3ef643SGordon Ross delay(MSEC_TO_TICK(100)); 111da6c28aaSamw } 112da6c28aaSamw 113da6c28aaSamw return (SDRC_NO_REPLY); 114da6c28aaSamw } 115