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