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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 /*
     22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     23  * Use is subject to license terms.
     24  */
     25 
     26 #include <smbsrv/smb_kproto.h>
     27 
     28 /*
     29  * The echo request is used to test the connection to the server,
     30  * and to see if the server is still responding.  The tid is ignored,
     31  * so this request may be sent to the server even if there are no
     32  * tree connections to the server.
     33  *
     34  * Each response echoes the data sent, though ByteCount may indicate
     35  * no data. If echo-count is zero, no response is sent.
     36  */
     37 smb_sdrc_t
     38 smb_pre_echo(smb_request_t *sr)
     39 {
     40 	DTRACE_SMB_1(op__Echo__start, smb_request_t *, sr);
     41 	return (SDRC_SUCCESS);
     42 }
     43 
     44 void
     45 smb_post_echo(smb_request_t *sr)
     46 {
     47 	DTRACE_SMB_1(op__Echo__done, smb_request_t *, sr);
     48 }
     49 
     50 smb_sdrc_t
     51 smb_com_echo(struct smb_request *sr)
     52 {
     53 	unsigned short necho;
     54 	unsigned short nbytes;
     55 	unsigned short i;
     56 	struct mbuf_chain reply;
     57 	char *data;
     58 
     59 	if (smbsr_decode_vwv(sr, "w", &necho) != 0)
     60 		return (SDRC_ERROR);
     61 
     62 	nbytes = sr->smb_bcc;
     63 	data = smb_srm_alloc(sr, nbytes);
     64 
     65 	if (smb_mbc_decodef(&sr->smb_data, "#c", nbytes, data))
     66 		return (SDRC_ERROR);
     67 
     68 	for (i = 1; i <= necho; ++i) {
     69 		MBC_INIT(&reply, SMB_HEADER_ED_LEN + 10 + nbytes);
     70 
     71 		(void) smb_mbc_encodef(&reply, SMB_HEADER_ED_FMT,
     72 		    sr->first_smb_com,
     73 		    sr->smb_rcls,
     74 		    sr->smb_reh,
     75 		    sr->smb_err,
     76 		    sr->smb_flg | SMB_FLAGS_REPLY,
     77 		    sr->smb_flg2,
     78 		    sr->smb_pid_high,
     79 		    sr->smb_sig,
     80 		    sr->smb_tid,
     81 		    sr->smb_pid,
     82 		    sr->smb_uid,
     83 		    sr->smb_mid);
     84 
     85 		(void) smb_mbc_encodef(&reply, "bww#c", 1, i,
     86 		    nbytes, nbytes, data);
     87 
     88 		if (sr->session->signing.flags & SMB_SIGNING_ENABLED)
     89 			smb_sign_reply(sr, &reply);
     90 
     91 		(void) smb_session_send(sr->session, 0, &reply);
     92 	}
     93 
     94 	return (SDRC_NO_REPLY);
     95 }
     96