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 /* 23 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * SMB plugin for reparse point operations. 29 * For more details refer to section 5.4 of PSARC/2009/387 30 */ 31 32 #include <stdio.h> 33 #include <unistd.h> 34 #include <strings.h> 35 #include <string.h> 36 #include <sys/types.h> 37 #include <sys/errno.h> 38 #include <syslog.h> 39 #include "rp_plugin.h" 40 41 #include <smbsrv/smb_dfs.h> 42 43 static char *smb_rpo_service_type(void); 44 static boolean_t smb_rpo_supports_svc(const char *); 45 static int smb_rpo_deref(const char *, const char *, char *, size_t *); 46 static int smb_rpo_form(const char *, const char *, char *, size_t *); 47 48 struct rp_plugin_ops rp_plugin_ops = { 49 RP_PLUGIN_V1, 50 NULL, /* rpo_init */ 51 NULL, /* rpo_fini */ 52 smb_rpo_service_type, 53 smb_rpo_supports_svc, 54 smb_rpo_form, 55 smb_rpo_deref 56 }; 57 58 /* 59 * Reports supported service type 60 */ 61 static char * 62 smb_rpo_service_type(void) 63 { 64 return (DFS_REPARSE_SVCTYPE); 65 } 66 67 /* 68 * Determines whether this plugin supports the given service type 69 */ 70 static boolean_t 71 smb_rpo_supports_svc(const char *svc_type) 72 { 73 if (svc_type == NULL) 74 return (B_FALSE); 75 76 if (strncasecmp(svc_type, DFS_REPARSE_SVCTYPE, 77 strlen(DFS_REPARSE_SVCTYPE)) == 0) 78 return (B_TRUE); 79 80 return (B_FALSE); 81 } 82 83 /* 84 * Accepts the service-specific item from the reparse point and returns the 85 * service-specific data requested. The caller specifies the size of the 86 * buffer provided via *bufsz; the routine will fail with EOVERFLOW if 87 * the results will not fit in the buffer, in which case, *bufsz will 88 * contain the number of bytes needed to hold the results. 89 * 90 * Currently, there is no transformation is needed to data stored in 91 * a reparse point for DFS, so 'buf' will contain the same data as 92 * 'svc_data'. 93 */ 94 static int 95 smb_rpo_deref(const char *svc_type, const char *svc_data, char *buf, 96 size_t *bufsz) 97 { 98 int slen; 99 100 if ((!svc_type) || (!svc_data) || (!buf) || (!bufsz)) 101 return (EINVAL); 102 103 if (strcasecmp(svc_type, DFS_REPARSE_SVCTYPE) != 0) 104 return (ENOTSUP); 105 106 slen = strlen(svc_data) + 1; 107 108 if (slen > *bufsz) { 109 *bufsz = slen; 110 return (EOVERFLOW); 111 } 112 113 (void) strlcpy(buf, svc_data, *bufsz); 114 115 return (0); 116 } 117 118 /* 119 * Returns a string with the appropriate service-specific syntax to create 120 * a reparse point of the given svc_type, using the string from the 121 * reparse_add() call as part of the string. 122 */ 123 static int 124 smb_rpo_form(const char *svc_type, const char *svc_data, char *buf, 125 size_t *bufsz) 126 { 127 int slen; 128 129 if ((!svc_type) || (!svc_data) || (!buf) || (!bufsz)) 130 return (EINVAL); 131 132 slen = strlen(svc_data) + 1; 133 134 if (slen > *bufsz) { 135 *bufsz = slen; 136 return (EOVERFLOW); 137 } 138 139 (void) strlcpy(buf, svc_data, *bufsz); 140 141 return (0); 142 } 143