1 /*- 2 * Copyright (c) 2005 Andrey Simonenko 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 #include <sys/un.h> 33 #include <inttypes.h> 34 #include <stdarg.h> 35 #include <stdbool.h> 36 #include <stdlib.h> 37 38 #include "uc_common.h" 39 #include "t_generic.h" 40 #include "t_sockcred.h" 41 42 static int 43 t_sockcred_client(int type, int fd) 44 { 45 struct msghdr msghdr; 46 struct iovec iov[1]; 47 int rv; 48 49 if (uc_sync_recv() < 0) 50 return (-2); 51 52 rv = -2; 53 54 uc_msghdr_init_client(&msghdr, iov, NULL, 0, 0, 0); 55 56 if (uc_socket_connect(fd) < 0) 57 goto done; 58 59 if (type == 2) 60 if (uc_sync_recv() < 0) 61 goto done; 62 63 if (uc_message_sendn(fd, &msghdr) < 0) 64 goto done; 65 66 rv = 0; 67 done: 68 return (rv); 69 } 70 71 static int 72 t_sockcred_server(int type, int fd1) 73 { 74 struct msghdr msghdr; 75 struct iovec iov[1]; 76 struct cmsghdr *cmsghdr; 77 void *cmsg_data; 78 size_t cmsg_size; 79 u_int i; 80 int fd2, rv, val; 81 82 fd2 = -1; 83 rv = -2; 84 85 cmsg_size = CMSG_SPACE(SOCKCREDSIZE(uc_cfg.proc_cred.gid_num)); 86 cmsg_data = malloc(cmsg_size); 87 if (cmsg_data == NULL) { 88 uc_logmsg("malloc"); 89 goto done; 90 } 91 92 if (type == 1) { 93 uc_dbgmsg("setting LOCAL_CREDS"); 94 val = 1; 95 if (setsockopt(fd1, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) { 96 uc_logmsg("setsockopt(LOCAL_CREDS)"); 97 goto done; 98 } 99 } 100 101 if (uc_sync_send() < 0) 102 goto done; 103 104 if (uc_cfg.sock_type == SOCK_STREAM) { 105 fd2 = uc_socket_accept(fd1); 106 if (fd2 < 0) 107 goto done; 108 } else 109 fd2 = fd1; 110 111 if (type == 2) { 112 uc_dbgmsg("setting LOCAL_CREDS"); 113 val = 1; 114 if (setsockopt(fd2, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) { 115 uc_logmsg("setsockopt(LOCAL_CREDS)"); 116 goto done; 117 } 118 if (uc_sync_send() < 0) 119 goto done; 120 } 121 122 rv = -1; 123 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) { 124 uc_dbgmsg("message #%u", i); 125 126 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size); 127 if (uc_message_recv(fd2, &msghdr) < 0) { 128 rv = -2; 129 break; 130 } 131 132 if (i > 1 && uc_cfg.sock_type == SOCK_STREAM) { 133 if (uc_check_msghdr(&msghdr, 0) < 0) 134 break; 135 } else { 136 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0) 137 break; 138 139 cmsghdr = CMSG_FIRSTHDR(&msghdr); 140 if (uc_check_scm_creds_sockcred(cmsghdr) < 0) 141 break; 142 } 143 } 144 if (i > uc_cfg.ipc_msg.msg_num) 145 rv = 0; 146 done: 147 free(cmsg_data); 148 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0) 149 if (uc_socket_close(fd2) < 0) 150 rv = -2; 151 return (rv); 152 } 153 154 int 155 t_sockcred_1(void) 156 { 157 u_int i; 158 int fd, rv, rv_client; 159 160 switch (uc_client_fork()) { 161 case 0: 162 for (i = 1; i <= 2; ++i) { 163 uc_dbgmsg("client #%u", i); 164 fd = uc_socket_create(); 165 if (fd < 0) 166 rv = -2; 167 else { 168 rv = t_sockcred_client(1, fd); 169 if (uc_socket_close(fd) < 0) 170 rv = -2; 171 } 172 if (rv != 0) 173 break; 174 } 175 uc_client_exit(rv); 176 break; 177 case 1: 178 fd = uc_socket_create(); 179 if (fd < 0) 180 rv = -2; 181 else { 182 rv = t_sockcred_server(1, fd); 183 if (rv == 0) 184 rv = t_sockcred_server(3, fd); 185 rv_client = uc_client_wait(); 186 if (rv == 0 || (rv == -2 && rv_client != 0)) 187 rv = rv_client; 188 if (uc_socket_close(fd) < 0) 189 rv = -2; 190 } 191 break; 192 default: 193 rv = -2; 194 } 195 196 return (rv); 197 } 198 199 static int 200 t_sockcred_2_client(int fd) 201 { 202 return (t_sockcred_client(2, fd)); 203 } 204 205 static int 206 t_sockcred_2_server(int fd) 207 { 208 return (t_sockcred_server(2, fd)); 209 } 210 211 int 212 t_sockcred_2(void) 213 { 214 return (t_generic(t_sockcred_2_client, t_sockcred_2_server)); 215 } 216