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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Client-side interface to the IO Daemon (IOD) 29 */ 30 31 #include <errno.h> 32 #include <fcntl.h> 33 #include <stdio.h> 34 #include <string.h> 35 #include <stdlib.h> 36 #include <unistd.h> 37 #include <netdb.h> 38 #include <libintl.h> 39 #include <door.h> 40 41 #include <sys/byteorder.h> 42 #include <sys/types.h> 43 #include <sys/fcntl.h> 44 #include <sys/ioctl.h> 45 #include <sys/time.h> 46 #include <sys/socket.h> 47 48 #include <netinet/in.h> 49 #include <netinet/tcp.h> 50 #include <arpa/inet.h> 51 52 #include <netsmb/smb_lib.h> 53 #include <netsmb/netbios.h> 54 #include <netsmb/nb_lib.h> 55 #include <netsmb/smb_dev.h> 56 57 #include "charsets.h" 58 #include "private.h" 59 60 static const char smbiod_path[] = "/usr/lib/smbfs/smbiod"; 61 62 /* 63 * This is constant for the life of a process, 64 * and initialized at startup, so no locks. 65 */ 66 static char door_path[40]; 67 68 char * 69 smb_iod_door_path(void) 70 { 71 static const char fmtR[] = "/var/run/smbiod-%d"; 72 static const char fmtU[] = "/tmp/.smbiod-%d"; 73 const char *fmt; 74 uid_t uid; 75 76 if (door_path[0] == '\0') { 77 uid = getuid(); 78 fmt = (uid == 0) ? fmtR : fmtU; 79 snprintf(door_path, sizeof (door_path), fmt, uid); 80 } 81 82 return (door_path); 83 } 84 85 /* 86 * Open the door (client side) and 87 * find out if the service is there. 88 */ 89 int 90 smb_iod_open_door(int *fdp) 91 { 92 door_arg_t da; 93 char *path; 94 int fd, rc; 95 int err = 0; 96 97 path = smb_iod_door_path(); 98 fd = open(path, O_RDONLY, 0); 99 if (fd < 0) 100 return (errno); 101 102 /* 103 * Make sure the IOD is running. 104 * Pass NULL args. 105 */ 106 memset(&da, 0, sizeof (da)); 107 da.rbuf = (void *) &err; 108 da.rsize = sizeof (err); 109 rc = door_call(fd, &da); 110 if (rc < 0) { 111 err = errno; 112 close(fd); 113 return (err); 114 } 115 if (err != 0) { 116 close(fd); 117 return (err); 118 } 119 120 /* This handle controls per-process resources. */ 121 (void) fcntl(fd, F_SETFD, FD_CLOEXEC); 122 123 *fdp = fd; 124 return (0); 125 } 126 127 /* 128 * Start the IOD and wait until we can 129 * open its client-side door. 130 */ 131 static int 132 start_iod(int *fdp) 133 { 134 int err, pid, t; 135 136 pid = vfork(); 137 if (pid < 0) 138 return (errno); 139 140 /* 141 * child: start smbiod 142 */ 143 if (pid == 0) { 144 char *argv[2]; 145 argv[0] = "smbiod"; 146 argv[1] = NULL; 147 execv(smbiod_path, argv); 148 return (errno); 149 } 150 151 /* 152 * parent: wait for smbiod to start 153 */ 154 for (t = 0; t < 10; t++) { 155 sleep(1); 156 err = smb_iod_open_door(fdp); 157 if (err == 0) 158 break; 159 } 160 161 return (err); 162 } 163 164 165 /* 166 * Start smbiod if necessary, and then 167 * ask it to connect using the info in ctx. 168 */ 169 int 170 smb_iod_cl_newvc(smb_ctx_t *ctx) 171 { 172 door_arg_t da; 173 int fd, err = 0; 174 175 err = smb_iod_open_door(&fd); 176 if (err != 0) { 177 err = start_iod(&fd); 178 if (err) 179 return (err); 180 } 181 182 da.data_ptr = (void *) &ctx->ct_iod_ssn; 183 da.data_size = sizeof (ctx->ct_iod_ssn); 184 da.desc_ptr = NULL; 185 da.desc_num = 0; 186 da.rbuf = (void *) &err; 187 da.rsize = sizeof (err); 188 if (door_call(fd, &da) < 0) { 189 err = errno; 190 DPRINT("door_call, err=%d", err); 191 } 192 close(fd); 193 194 return (err); 195 } 196