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      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 <stdint.h>
     34 #include "test_nlattr.h"
     35 #include <linux/netlink_diag.h>
     36 #include <linux/sock_diag.h>
     37 
     38 static void
     39 init_netlink_diag_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
     40 {
     41 	SET_STRUCT(struct nlmsghdr, nlh,
     42 		.nlmsg_len = msg_len,
     43 		.nlmsg_type = SOCK_DIAG_BY_FAMILY,
     44 		.nlmsg_flags = NLM_F_DUMP
     45 	);
     46 
     47 	struct netlink_diag_msg *const msg = NLMSG_DATA(nlh);
     48 	SET_STRUCT(struct netlink_diag_msg, msg,
     49 		.ndiag_family = AF_NETLINK,
     50 		.ndiag_type = SOCK_RAW,
     51 		.ndiag_protocol = NETLINK_ROUTE,
     52 		.ndiag_state = NETLINK_CONNECTED
     53 	);
     54 }
     55 
     56 static void
     57 print_netlink_diag_msg(const unsigned int msg_len)
     58 {
     59 	printf("{len=%u, type=SOCK_DIAG_BY_FAMILY"
     60 	       ", flags=NLM_F_DUMP, seq=0, pid=0}, {ndiag_family=AF_NETLINK"
     61 	       ", ndiag_type=SOCK_RAW, ndiag_protocol=NETLINK_ROUTE"
     62 	       ", ndiag_state=NETLINK_CONNECTED, ndiag_portid=0"
     63 	       ", ndiag_dst_portid=0, ndiag_dst_group=0, ndiag_ino=0"
     64 	       ", ndiag_cookie=[0, 0]}",
     65 	       msg_len);
     66 }
     67 
     68 static void
     69 print_xlong(const unsigned long *p)
     70 {
     71 	printf("%#lx", *p);
     72 }
     73 
     74 int
     75 main(void)
     76 {
     77 	skip_if_unavailable("/proc/self/fd/");
     78 
     79 	const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
     80 	const unsigned int hdrlen = sizeof(struct netlink_diag_msg);
     81 	void *const nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
     82 
     83 	static char pattern[4096];
     84 	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
     85 
     86 	static const unsigned long groups[] = {
     87 		(unsigned long) 0xdeadbeefbadc0dedULL,
     88 		(unsigned long) 0xdeadbeefbadc0dedULL
     89 	};
     90 	TEST_NLATTR_ARRAY(fd, nlh0, hdrlen,
     91 			  init_netlink_diag_msg, print_netlink_diag_msg,
     92 			  NETLINK_DIAG_GROUPS, pattern, groups, print_xlong);
     93 
     94 	static const struct netlink_diag_ring ndr = {
     95 		.ndr_block_size = 0xfabfabdc,
     96 		.ndr_block_nr = 0xabcdabda,
     97 		.ndr_frame_size = 0xcbadbafa,
     98 		.ndr_frame_nr = 0xdbcafadb
     99 	};
    100 	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
    101 			   init_netlink_diag_msg, print_netlink_diag_msg,
    102 			   NETLINK_DIAG_RX_RING, pattern, ndr,
    103 			   PRINT_FIELD_U("{", ndr, ndr_block_size);
    104 			   PRINT_FIELD_U(", ", ndr, ndr_block_nr);
    105 			   PRINT_FIELD_U(", ", ndr, ndr_frame_size);
    106 			   PRINT_FIELD_U(", ", ndr, ndr_frame_nr);
    107 			   printf("}"));
    108 
    109 	static const uint32_t flags =
    110 		NDIAG_FLAG_CB_RUNNING | NDIAG_FLAG_PKTINFO;
    111 	TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
    112 			   init_netlink_diag_msg, print_netlink_diag_msg,
    113 			   NETLINK_DIAG_FLAGS, pattern, flags,
    114 			   printf("NDIAG_FLAG_CB_RUNNING|NDIAG_FLAG_PKTINFO"));
    115 
    116 	puts("+++ exited with 0 +++");
    117 	return 0;
    118 }
    119