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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <assert.h> 30 #include <door.h> 31 #include <errno.h> 32 #include <fcntl.h> 33 #include <pthread.h> 34 #include <signal.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <sys/stat.h> 38 #include <unistd.h> 39 #include <ucred.h> 40 41 #include "repcache_protocol.h" 42 #include "configd.h" 43 44 #define INVALID_RESULT ((uint32_t)-1U) 45 46 static int main_door_fd = -1; 47 48 /*ARGSUSED*/ 49 static void 50 main_switcher(void *cookie, char *argp, size_t arg_size, door_desc_t *desc, 51 uint_t n_desc) 52 { 53 repository_door_request_t *request; 54 repository_door_response_t reply; 55 door_desc_t reply_desc; 56 57 thread_info_t *ti = thread_self(); 58 59 int send_desc = 0; 60 int fd; 61 62 thread_newstate(ti, TI_MAIN_DOOR_CALL); 63 ti->ti_main_door_request = (void *)argp; 64 65 assert(cookie == REPOSITORY_DOOR_COOKIE); 66 67 reply.rdr_status = INVALID_RESULT; 68 69 if (argp == DOOR_UNREF_DATA) { 70 backend_fini(); 71 72 exit(CONFIGD_EXIT_LOST_MAIN_DOOR); 73 } 74 75 /* 76 * No file descriptors allowed 77 */ 78 assert(n_desc == 0); 79 80 /* 81 * first, we just check the version 82 */ 83 if (arg_size < offsetofend(repository_door_request_t, rdr_version)) { 84 reply.rdr_status = REPOSITORY_DOOR_FAIL_BAD_REQUEST; 85 goto fail; 86 } 87 88 /* LINTED alignment */ 89 request = (repository_door_request_t *)argp; 90 ti->ti_main_door_request = request; 91 92 if (request->rdr_version != REPOSITORY_DOOR_VERSION) { 93 reply.rdr_status = REPOSITORY_DOOR_FAIL_VERSION_MISMATCH; 94 goto fail; 95 } 96 97 /* 98 * Now, check that the argument is of the minimum required size 99 */ 100 if (arg_size < offsetofend(repository_door_request_t, rdr_request)) { 101 reply.rdr_status = REPOSITORY_DOOR_FAIL_BAD_REQUEST; 102 goto fail; 103 } 104 105 if (door_ucred(&ti->ti_ucred) != 0) { 106 reply.rdr_status = REPOSITORY_DOOR_FAIL_PERMISSION_DENIED; 107 goto fail; 108 } 109 110 switch (request->rdr_request) { 111 case REPOSITORY_DOOR_REQUEST_CONNECT: 112 fd = -1; 113 reply.rdr_status = create_connection(ti->ti_ucred, request, 114 arg_size, &fd); 115 if (reply.rdr_status != REPOSITORY_DOOR_SUCCESS) { 116 assert(fd == -1); 117 goto fail; 118 } 119 assert(fd != -1); 120 reply_desc.d_attributes = DOOR_DESCRIPTOR | DOOR_RELEASE; 121 reply_desc.d_data.d_desc.d_descriptor = fd; 122 send_desc = 1; 123 break; 124 125 default: 126 reply.rdr_status = REPOSITORY_DOOR_FAIL_BAD_REQUEST; 127 goto fail; 128 } 129 130 fail: 131 assert(reply.rdr_status != INVALID_RESULT); 132 133 thread_newstate(ti, TI_DOOR_RETURN); 134 ti->ti_main_door_request = NULL; 135 136 (void) door_return((char *)&reply, sizeof (reply), 137 &reply_desc, (send_desc)? 1:0); 138 (void) door_return(NULL, 0, NULL, 0); 139 } 140 141 int 142 setup_main_door(const char *doorpath) 143 { 144 mode_t oldmask; 145 int fd; 146 147 int door_flags = DOOR_UNREF | DOOR_REFUSE_DESC; 148 #ifdef DOOR_NO_CANCEL 149 door_flags |= DOOR_NO_CANCEL; 150 #endif 151 if ((main_door_fd = door_create(main_switcher, REPOSITORY_DOOR_COOKIE, 152 door_flags)) < 0) { 153 perror("door_create"); 154 return (0); 155 } 156 157 #ifdef DOOR_PARAM_DATA_MIN 158 if (door_setparam(main_door_fd, DOOR_PARAM_DATA_MIN, 159 offsetofend(repository_door_request_t, rdr_request)) == -1 || 160 door_setparam(main_door_fd, DOOR_PARAM_DATA_MAX, 161 sizeof (repository_door_request_t)) == -1) { 162 perror("door_setparam"); 163 return (0); 164 } 165 #endif /* DOOR_PARAM_DATA_MIN */ 166 167 /* 168 * Create the file if it doesn't exist. Ignore errors, since 169 * fattach(3C) will catch any real problems. 170 */ 171 oldmask = umask(000); /* disable umask temporarily */ 172 fd = open(doorpath, O_RDWR | O_CREAT | O_EXCL, 0644); 173 (void) umask(oldmask); 174 175 if (fd >= 0) 176 (void) close(fd); 177 178 if (fattach(main_door_fd, doorpath) < 0) { 179 if ((errno != EBUSY) || 180 (fdetach(doorpath) < 0) || 181 (fattach(main_door_fd, doorpath) < 0)) { 182 perror("fattach"); 183 (void) door_revoke(main_door_fd); 184 main_door_fd = -1; 185 return (0); 186 } 187 } 188 189 return (1); 190 } 191