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 #include "t_cmsgcred_sockcred.h" 39 40 static int 41 t_cmsgcred_sockcred_server(int fd1) 42 { 43 struct msghdr msghdr; 44 struct iovec iov[1]; 45 struct cmsghdr *cmsghdr; 46 void *cmsg_data, *cmsg1_data, *cmsg2_data; 47 size_t cmsg_size, cmsg1_size, cmsg2_size; 48 u_int i; 49 int fd2, rv, val; 50 51 fd2 = -1; 52 rv = -2; 53 54 cmsg1_size = CMSG_SPACE(SOCKCREDSIZE(uc_cfg.proc_cred.gid_num)); 55 cmsg2_size = CMSG_SPACE(sizeof(struct cmsgcred)); 56 cmsg1_data = malloc(cmsg1_size); 57 cmsg2_data = malloc(cmsg2_size); 58 if (cmsg1_data == NULL || cmsg2_data == NULL) { 59 uc_logmsg("malloc"); 60 goto done; 61 } 62 63 uc_dbgmsg("setting LOCAL_CREDS"); 64 val = 1; 65 if (setsockopt(fd1, 0, LOCAL_CREDS, &val, sizeof(val)) < 0) { 66 uc_logmsg("setsockopt(LOCAL_CREDS)"); 67 goto done; 68 } 69 70 if (uc_sync_send() < 0) 71 goto done; 72 73 if (uc_cfg.sock_type == SOCK_STREAM) { 74 fd2 = uc_socket_accept(fd1); 75 if (fd2 < 0) 76 goto done; 77 } else 78 fd2 = fd1; 79 80 cmsg_data = cmsg1_data; 81 cmsg_size = cmsg1_size; 82 rv = -1; 83 for (i = 1; i <= uc_cfg.ipc_msg.msg_num; ++i) { 84 uc_dbgmsg("message #%u", i); 85 86 uc_msghdr_init_server(&msghdr, iov, cmsg_data, cmsg_size); 87 if (uc_message_recv(fd2, &msghdr) < 0) { 88 rv = -2; 89 break; 90 } 91 92 if (uc_check_msghdr(&msghdr, sizeof(*cmsghdr)) < 0) 93 break; 94 95 cmsghdr = CMSG_FIRSTHDR(&msghdr); 96 if (i == 1 || uc_cfg.sock_type == SOCK_DGRAM) { 97 if (uc_check_scm_creds_sockcred(cmsghdr) < 0) 98 break; 99 } else { 100 if (uc_check_scm_creds_cmsgcred(cmsghdr) < 0) 101 break; 102 } 103 104 cmsg_data = cmsg2_data; 105 cmsg_size = cmsg2_size; 106 } 107 if (i > uc_cfg.ipc_msg.msg_num) 108 rv = 0; 109 done: 110 free(cmsg1_data); 111 free(cmsg2_data); 112 if (uc_cfg.sock_type == SOCK_STREAM && fd2 >= 0) 113 if (uc_socket_close(fd2) < 0) 114 rv = -2; 115 return (rv); 116 } 117 118 int 119 t_cmsgcred_sockcred(void) 120 { 121 return (t_generic(t_cmsgcred_client, t_cmsgcred_sockcred_server)); 122 } 123