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