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 #include <sys/types.h> 29 #include <sys/socket.h> 30 #include <sys/un.h> 31 #include <inttypes.h> 32 #include <stdarg.h> 33 #include <stdbool.h> 34 #include <stdlib.h> 35 36 #include "uc_common.h" 37 #include "t_generic.h" 38 #include "t_cmsgcred.h" 39 40 int 41 t_cmsgcred_client(int fd) 42 { 43 struct msghdr msghdr; 44 struct iovec iov[1]; 45 void *cmsg_data; 46 size_t cmsg_size; 47 int rv; 48 49 if (uc_sync_recv() < 0) 50 return (-2); 51 52 rv = -2; 53 54 cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred)); 55 cmsg_data = malloc(cmsg_size); 56 if (cmsg_data == NULL) { 57 uc_logmsg("malloc"); 58 goto done; 59 } 60 uc_msghdr_init_client(&msghdr, iov, cmsg_data, cmsg_size, 61 SCM_CREDS, sizeof(struct cmsgcred)); 62 63 if (uc_socket_connect(fd) < 0) 64 goto done; 65 66 if (uc_message_sendn(fd, &msghdr) < 0) 67 goto done; 68 69 rv = 0; 70 done: 71 free(cmsg_data); 72 return (rv); 73 } 74 75 static int 76 t_cmsgcred_server(int fd1) 77 { 78 struct msghdr msghdr; 79 struct iovec iov[1]; 80 struct cmsghdr *cmsghdr; 81 void *cmsg_data; 82 size_t cmsg_size; 83 u_int i; 84 int fd2, rv; 85 86 if (uc_sync_send() < 0) 87 return (-2); 88 89 fd2 = -1; 90 rv = -2; 91 92 cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred)); 93 cmsg_data = malloc(cmsg_size); 94 if (cmsg_data == NULL) { 95 uc_logmsg("malloc"); 96 goto done; 97 } 98 99 if (uc_cfg.sock_type == SOCK_STREAM) { 100 fd2 = uc_socket_accept(fd1); 101 if (fd2 < 0) 102 goto done; 103 } else 104 fd2 = fd1; 105 106 rv = -1; 107 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) { 108 uc_dbgmsg("message #%u", i); 109 110 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size); 111 if (uc_message_recv(fd2, &msghdr) < 0) { 112 rv = -2; 113 break; 114 } 115 116 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0) 117 break; 118 119 cmsghdr = CMSG_FIRSTHDR(&msghdr); 120 if (uc_check_scm_creds_cmsgcred(cmsghdr) < 0) 121 break; 122 } 123 if (i > uc_cfg.ipc_msg.msg_num) 124 rv = 0; 125 done: 126 free(cmsg_data); 127 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0) 128 if (uc_socket_close(fd2) < 0) 129 rv = -2; 130 return (rv); 131 } 132 133 int 134 t_cmsgcred(void) 135 { 136 return (t_generic(t_cmsgcred_client, t_cmsgcred_server)); 137 } 138