1 /* 2 * Copyright (c) 2017 JingPiao Chen <chenjingpiao (at) gmail.com> 3 * Copyright (c) 2017 The strace developers. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include "tests.h" 30 31 #include <stdio.h> 32 #include <string.h> 33 #include <sys/socket.h> 34 #include <arpa/inet.h> 35 #include <net/if.h> 36 #include <netinet/tcp.h> 37 #include "test_nlattr.h" 38 #include <linux/inet_diag.h> 39 #include <linux/rtnetlink.h> 40 #include <linux/sock_diag.h> 41 42 static const char address[] = "10.11.12.13"; 43 44 static void 45 init_inet_diag_req(struct nlmsghdr *const nlh, const unsigned int msg_len) 46 { 47 SET_STRUCT(struct nlmsghdr, nlh, 48 .nlmsg_len = msg_len, 49 .nlmsg_type = TCPDIAG_GETSOCK, 50 .nlmsg_flags = NLM_F_REQUEST 51 ); 52 53 struct inet_diag_req *const req = NLMSG_DATA(nlh); 54 SET_STRUCT(struct inet_diag_req, req, 55 .idiag_family = AF_INET, 56 .idiag_ext = 1 << (INET_DIAG_TOS - 1), 57 .idiag_states = 1 << TCP_LAST_ACK, 58 .id.idiag_if = ifindex_lo() 59 ); 60 61 if (!inet_pton(AF_INET, address, req->id.idiag_src) || 62 !inet_pton(AF_INET, address, req->id.idiag_dst)) 63 perror_msg_and_skip("inet_pton"); 64 } 65 66 static void 67 print_inet_diag_req(const unsigned int msg_len) 68 { 69 printf("{len=%u, type=TCPDIAG_GETSOCK, flags=NLM_F_REQUEST" 70 ", seq=0, pid=0}, {idiag_family=AF_INET" 71 ", idiag_src_len=0, idiag_dst_len=0" 72 ", idiag_ext=1<<(INET_DIAG_TOS-1)" 73 ", id={idiag_sport=htons(0), idiag_dport=htons(0)" 74 ", idiag_src=inet_addr(\"%s\")" 75 ", idiag_dst=inet_addr(\"%s\")" 76 ", idiag_if=" IFINDEX_LO_STR 77 ", idiag_cookie=[0, 0]}" 78 ", idiag_states=1<<TCP_LAST_ACK, idiag_dbs=0}", 79 msg_len, address, address); 80 } 81 82 int 83 main(void) 84 { 85 skip_if_unavailable("/proc/self/fd/"); 86 87 int fd = create_nl_socket(NETLINK_SOCK_DIAG); 88 const unsigned int hdrlen = sizeof(struct inet_diag_req); 89 void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen)); 90 91 static char pattern[4096]; 92 fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1); 93 94 char nla_type_str[256]; 95 sprintf(nla_type_str, "%#x /* INET_DIAG_REQ_??? */", 96 INET_DIAG_REQ_BYTECODE + 1); 97 TEST_NLATTR_(fd, nlh0, hdrlen, 98 init_inet_diag_req, print_inet_diag_req, 99 INET_DIAG_REQ_BYTECODE + 1, nla_type_str, 100 4, pattern, 4, 101 print_quoted_hex(pattern, 4)); 102 103 puts("+++ exited with 0 +++"); 104 return 0; 105 } 106
