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_cmsgcred.h" 41 42 int 43 t_cmsgcred_client(int fd) 44 { 45 struct msghdr msghdr; 46 struct iovec iov[1]; 47 void *cmsg_data; 48 size_t cmsg_size; 49 int rv; 50 51 if (uc_sync_recv() < 0) 52 return (-2); 53 54 rv = -2; 55 56 cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred)); 57 cmsg_data = malloc(cmsg_size); 58 if (cmsg_data == NULL) { 59 uc_logmsg("malloc"); 60 goto done; 61 } 62 uc_msghdr_init_client(&msghdr, iov, cmsg_data, cmsg_size, 63 SCM_CREDS, sizeof(struct cmsgcred)); 64 65 if (uc_socket_connect(fd) < 0) 66 goto done; 67 68 if (uc_message_sendn(fd, &msghdr) < 0) 69 goto done; 70 71 rv = 0; 72 done: 73 free(cmsg_data); 74 return (rv); 75 } 76 77 static int 78 t_cmsgcred_server(int fd1) 79 { 80 struct msghdr msghdr; 81 struct iovec iov[1]; 82 struct cmsghdr *cmsghdr; 83 void *cmsg_data; 84 size_t cmsg_size; 85 u_int i; 86 int fd2, rv; 87 88 if (uc_sync_send() < 0) 89 return (-2); 90 91 fd2 = -1; 92 rv = -2; 93 94 cmsg_size = CMSG_SPACE(sizeof(struct cmsgcred)); 95 cmsg_data = malloc(cmsg_size); 96 if (cmsg_data == NULL) { 97 uc_logmsg("malloc"); 98 goto done; 99 } 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 rv = -1; 109 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) { 110 uc_dbgmsg("message #%u", i); 111 112 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size); 113 if (uc_message_recv(fd2, &msghdr) < 0) { 114 rv = -2; 115 break; 116 } 117 118 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0) 119 break; 120 121 cmsghdr = CMSG_FIRSTHDR(&msghdr); 122 if (uc_check_scm_creds_cmsgcred(cmsghdr) < 0) 123 break; 124 } 125 if (i > uc_cfg.ipc_msg.msg_num) 126 rv = 0; 127 done: 128 free(cmsg_data); 129 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0) 130 if (uc_socket_close(fd2) < 0) 131 rv = -2; 132 return (rv); 133 } 134 135 int 136 t_cmsgcred(void) 137 { 138 return (t_generic(t_cmsgcred_client, t_cmsgcred_server)); 139 } 140