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      1 /*
      2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao (at) gmail.com>
      3  * Copyright (c) 2017-2018 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 #ifdef HAVE_STRUCT_DCBMSG
     32 
     33 # include <stdio.h>
     34 # include "test_nlattr.h"
     35 # include <linux/dcbnl.h>
     36 # include <linux/rtnetlink.h>
     37 
     38 static void
     39 init_dcbmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
     40 {
     41 	SET_STRUCT(struct nlmsghdr, nlh,
     42 		.nlmsg_len = msg_len,
     43 		.nlmsg_type = RTM_GETDCB,
     44 		.nlmsg_flags = NLM_F_DUMP
     45 	);
     46 
     47 	struct dcbmsg *const msg = NLMSG_DATA(nlh);
     48 	SET_STRUCT(struct dcbmsg, msg,
     49 		.dcb_family = AF_UNIX,
     50 		.cmd = DCB_CMD_UNDEFINED
     51 	);
     52 }
     53 
     54 static void
     55 print_dcbmsg(const unsigned int msg_len)
     56 {
     57 	printf("{len=%u, type=RTM_GETDCB, flags=NLM_F_DUMP"
     58 	       ", seq=0, pid=0}, {dcb_family=AF_UNIX"
     59 	       ", cmd=DCB_CMD_UNDEFINED}",
     60 	       msg_len);
     61 }
     62 
     63 int
     64 main(void)
     65 {
     66 	skip_if_unavailable("/proc/self/fd/");
     67 
     68 	const int fd = create_nl_socket(NETLINK_ROUTE);
     69 	const unsigned int hdrlen = sizeof(struct dcbmsg);
     70 	void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 4);
     71 
     72 	static char pattern[4096];
     73 	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
     74 
     75 	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
     76 	char nla_type_str[256];
     77 	sprintf(nla_type_str, "%#x /* DCB_ATTR_??? */", nla_type);
     78 	TEST_NLATTR_(fd, nlh0, hdrlen,
     79 		     init_dcbmsg, print_dcbmsg,
     80 		     nla_type, nla_type_str,
     81 		     4, pattern, 4,
     82 		     print_quoted_hex(pattern, 4));
     83 
     84 	puts("+++ exited with 0 +++");
     85 	return 0;
     86 }
     87 
     88 #else
     89 
     90 SKIP_MAIN_UNDEFINED("HAVE_STRUCT_DCBMSG")
     91 
     92 #endif
     93