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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * User-space door client routines for both SMB daemon and CLIs. 30 */ 31 32 #include <fcntl.h> 33 #include <syslog.h> 34 #include <door.h> 35 #include <string.h> 36 #include <strings.h> 37 #include <stdlib.h> 38 #include <errno.h> 39 #include <sys/mman.h> 40 #include <smbsrv/libsmb.h> 41 #include <smbsrv/wintypes.h> 42 #include <smbsrv/smb_door_svc.h> 43 #include <smbsrv/smb_common_door.h> 44 45 /* 46 * Returns 0 on success. Otherwise, -1. 47 */ 48 int 49 smb_dr_clnt_open(int *fd, char *path, char *op_desc) 50 { 51 int rc = 0; 52 53 if (!op_desc) 54 op_desc = "unknown operation"; 55 56 if (!path || !fd) 57 return (-1); 58 59 if ((*fd = open(path, O_RDONLY)) < 0) { 60 syslog(LOG_ERR, "%s: open %s failed %s", op_desc, 61 path, strerror(errno)); 62 rc = -1; 63 } 64 65 return (rc); 66 } 67 68 /* 69 * smb_dr_clnt_call 70 * 71 * This function will make a door call to the server function 72 * associated with the door descriptor fd. The specified door 73 * request buffer (i.e. argp) will be passed as the argument to the 74 * door_call(). Upon success, the result buffer is returned. Otherwise, 75 * NULL pointer is returned. The size of the result buffer is returned 76 * via rbufsize. 77 */ 78 char * 79 smb_dr_clnt_call(int fd, char *argp, size_t arg_size, size_t *rbufsize, 80 char *op_desc) 81 { 82 door_arg_t arg; 83 84 if (!argp) { 85 syslog(LOG_ERR, "smb_dr_clnt_call: invalid parameter"); 86 return (NULL); 87 } 88 89 arg.data_ptr = argp; 90 arg.data_size = arg_size; 91 arg.desc_ptr = NULL; 92 arg.desc_num = 0; 93 arg.rbuf = argp; 94 arg.rsize = arg_size; 95 96 if (!op_desc) 97 op_desc = "unknown operation"; 98 99 if (door_call(fd, &arg) < 0) { 100 syslog(LOG_ERR, "%s: Door call failed %s", op_desc, 101 strerror(errno)); 102 free(argp); 103 argp = NULL; 104 return (NULL); 105 } 106 107 if (smb_dr_get_res_stat(arg.data_ptr, arg.rsize) 108 != SMB_DR_OP_SUCCESS) { 109 smb_dr_clnt_free(argp, arg_size, arg.rbuf, arg.rsize); 110 *rbufsize = 0; 111 return (NULL); 112 } 113 *rbufsize = arg.rsize; 114 return (arg.data_ptr); 115 } 116 117 /* 118 * smb_dr_clnt_free 119 * 120 * This function should be invoked to free both the argument/result door buffer 121 * regardless of the status of the door call. 122 * 123 * The doorfs allocates a new buffer if the result buffer passed by the client 124 * is too small. This function will munmap if that happens. 125 */ 126 /*ARGSUSED*/ 127 void 128 smb_dr_clnt_free(char *argp, size_t arg_size, char *rbufp, size_t rbuf_size) 129 { 130 if (argp) { 131 if (argp == rbufp) { 132 free(argp); 133 argp = NULL; 134 } else if (rbufp) { 135 free(argp); 136 argp = NULL; 137 if (munmap(rbufp, rbuf_size) != 0) { 138 syslog(LOG_ERR, "munmap failed"); 139 } 140 } 141 } else { 142 if (rbufp) { 143 if (munmap(rbufp, rbuf_size) != 0) { 144 syslog(LOG_ERR, "munmap failed"); 145 } 146 } 147 } 148 } 149