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 #include "t_cmsgcred_sockcred.h" 40 41 static int 42 t_cmsgcred_sockcred_server(int fd1) 43 { 44 struct msghdr msghdr; 45 struct iovec iov[1]; 46 struct cmsghdr *cmsghdr; 47 void *cmsg_data, *cmsg1_data, *cmsg2_data; 48 size_t cmsg_size, cmsg1_size, cmsg2_size; 49 u_int i; 50 int fd2, rv, val; 51 52 fd2 = -1; 53 rv = -2; 54 55 cmsg1_size = CMSG_SPACE(SOCKCREDSIZE(uc_cfg.proc_cred.gid_num)); 56 cmsg2_size = CMSG_SPACE(sizeof(struct cmsgcred)); 57 cmsg1_data = malloc(cmsg1_size); 58 cmsg2_data = malloc(cmsg2_size); 59 if (cmsg1_data == NULL || cmsg2_data == NULL) { 60 uc_logmsg("malloc"); 61 goto done; 62 } 63 64 uc_dbgmsg("setting LOCAL_CREDS"); 65 val = 1; 66 if (setsockopt(fd1, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) { 67 uc_logmsg("setsockopt(LOCAL_CREDS)"); 68 goto done; 69 } 70 71 if (uc_sync_send() < 0) 72 goto done; 73 74 if (uc_cfg.sock_type == SOCK_STREAM) { 75 fd2 = uc_socket_accept(fd1); 76 if (fd2 < 0) 77 goto done; 78 } else 79 fd2 = fd1; 80 81 cmsg_data = cmsg1_data; 82 cmsg_size = cmsg1_size; 83 rv = -1; 84 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) { 85 uc_dbgmsg("message #%u", i); 86 87 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size); 88 if (uc_message_recv(fd2, &msghdr) < 0) { 89 rv = -2; 90 break; 91 } 92 93 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0) 94 break; 95 96 cmsghdr = CMSG_FIRSTHDR(&msghdr); 97 if (i == 1 || uc_cfg.sock_type == SOCK_DGRAM) { 98 if (uc_check_scm_creds_sockcred(cmsghdr) < 0) 99 break; 100 } else { 101 if (uc_check_scm_creds_cmsgcred(cmsghdr) < 0) 102 break; 103 } 104 105 cmsg_data = cmsg2_data; 106 cmsg_size = cmsg2_size; 107 } 108 if (i > uc_cfg.ipc_msg.msg_num) 109 rv = 0; 110 done: 111 free(cmsg1_data); 112 free(cmsg2_data); 113 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0) 114 if (uc_socket_close(fd2) < 0) 115 rv = -2; 116 return (rv); 117 } 118 119 int 120 t_cmsgcred_sockcred(void) 121 { 122 return (t_generic(t_cmsgcred_client, t_cmsgcred_sockcred_server)); 123 } 124