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/types.h> 28 #include <sys/socket.h> 29 #include <sys/un.h> 30 #include <inttypes.h> 31 #include <stdarg.h> 32 #include <stdbool.h> 33 #include <stdlib.h> 34 35 #include "uc_common.h" 36 #include "t_generic.h" 37 #include "t_sockcred.h" 38 39 static int 40 t_sockcred_client(int type, int fd) 41 { 42 struct msghdr msghdr; 43 struct iovec iov[1]; 44 int rv; 45 46 if (uc_sync_recv() < 0) 47 return (-2); 48 49 rv = -2; 50 51 uc_msghdr_init_client(&msghdr, iov, NULL, 0, 0, 0); 52 53 if (uc_socket_connect(fd) < 0) 54 goto done; 55 56 if (type == 2) 57 if (uc_sync_recv() < 0) 58 goto done; 59 60 if (uc_message_sendn(fd, &msghdr) < 0) 61 goto done; 62 63 rv = 0; 64 done: 65 return (rv); 66 } 67 68 static int 69 t_sockcred_server(int type, int fd1) 70 { 71 struct msghdr msghdr; 72 struct iovec iov[1]; 73 struct cmsghdr *cmsghdr; 74 void *cmsg_data; 75 size_t cmsg_size; 76 u_int i; 77 int fd2, rv, val; 78 79 fd2 = -1; 80 rv = -2; 81 82 cmsg_size = CMSG_SPACE(SOCKCREDSIZE(uc_cfg.proc_cred.gid_num)); 83 cmsg_data = malloc(cmsg_size); 84 if (cmsg_data == NULL) { 85 uc_logmsg("malloc"); 86 goto done; 87 } 88 89 if (type == 1) { 90 uc_dbgmsg("setting LOCAL_CREDS"); 91 val = 1; 92 if (setsockopt(fd1, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) { 93 uc_logmsg("setsockopt(LOCAL_CREDS)"); 94 goto done; 95 } 96 } 97 98 if (uc_sync_send() < 0) 99 goto done; 100 101 if (uc_cfg.sock_type == SOCK_STREAM) { 102 fd2 = uc_socket_accept(fd1); 103 if (fd2 < 0) 104 goto done; 105 } else 106 fd2 = fd1; 107 108 if (type == 2) { 109 uc_dbgmsg("setting LOCAL_CREDS"); 110 val = 1; 111 if (setsockopt(fd2, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) { 112 uc_logmsg("setsockopt(LOCAL_CREDS)"); 113 goto done; 114 } 115 if (uc_sync_send() < 0) 116 goto done; 117 } 118 119 rv = -1; 120 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) { 121 uc_dbgmsg("message #%u", i); 122 123 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size); 124 if (uc_message_recv(fd2, &msghdr) < 0) { 125 rv = -2; 126 break; 127 } 128 129 if (i > 1 && uc_cfg.sock_type == SOCK_STREAM) { 130 if (uc_check_msghdr(&msghdr, 0) < 0) 131 break; 132 } else { 133 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0) 134 break; 135 136 cmsghdr = CMSG_FIRSTHDR(&msghdr); 137 if (uc_check_scm_creds_sockcred(cmsghdr) < 0) 138 break; 139 } 140 } 141 if (i > uc_cfg.ipc_msg.msg_num) 142 rv = 0; 143 done: 144 free(cmsg_data); 145 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0) 146 if (uc_socket_close(fd2) < 0) 147 rv = -2; 148 return (rv); 149 } 150 151 int 152 t_sockcred_1(void) 153 { 154 u_int i; 155 int fd, rv, rv_client; 156 157 switch (uc_client_fork()) { 158 case 0: 159 for (i = 1; i <= 2; ++i) { 160 uc_dbgmsg("client #%u", i); 161 fd = uc_socket_create(); 162 if (fd < 0) 163 rv = -2; 164 else { 165 rv = t_sockcred_client(1, fd); 166 if (uc_socket_close(fd) < 0) 167 rv = -2; 168 } 169 if (rv != 0) 170 break; 171 } 172 uc_client_exit(rv); 173 break; 174 case 1: 175 fd = uc_socket_create(); 176 if (fd < 0) 177 rv = -2; 178 else { 179 rv = t_sockcred_server(1, fd); 180 if (rv == 0) 181 rv = t_sockcred_server(3, fd); 182 rv_client = uc_client_wait(); 183 if (rv == 0 || (rv == -2 && rv_client != 0)) 184 rv = rv_client; 185 if (uc_socket_close(fd) < 0) 186 rv = -2; 187 } 188 break; 189 default: 190 rv = -2; 191 } 192 193 return (rv); 194 } 195 196 static int 197 t_sockcred_2_client(int fd) 198 { 199 return (t_sockcred_client(2, fd)); 200 } 201 202 static int 203 t_sockcred_2_server(int fd) 204 { 205 return (t_sockcred_server(2, fd)); 206 } 207 208 int 209 t_sockcred_2(void) 210 { 211 return (t_generic(t_sockcred_2_client, t_sockcred_2_server)); 212 } 213