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 "test_nlattr.h" 33 #include <linux/if.h> 34 #include <linux/if_arp.h> 35 #ifdef HAVE_LINUX_IF_LINK_H 36 # include <linux/if_link.h> 37 #endif 38 #include <linux/rtnetlink.h> 39 40 #ifndef IFLA_XDP 41 # define IFLA_XDP 43 42 #endif 43 #ifndef IFLA_XDP_FD 44 # define IFLA_XDP_FD 1 45 #endif 46 47 const unsigned int hdrlen = sizeof(struct ifinfomsg); 48 49 static void 50 init_ifinfomsg(struct nlmsghdr *const nlh, const unsigned int msg_len) 51 { 52 SET_STRUCT(struct nlmsghdr, nlh, 53 .nlmsg_len = msg_len, 54 .nlmsg_type = RTM_GETLINK, 55 .nlmsg_flags = NLM_F_DUMP 56 ); 57 58 struct ifinfomsg *const msg = NLMSG_DATA(nlh); 59 SET_STRUCT(struct ifinfomsg, msg, 60 .ifi_family = AF_UNIX, 61 .ifi_type = ARPHRD_LOOPBACK, 62 .ifi_index = ifindex_lo(), 63 .ifi_flags = IFF_UP, 64 ); 65 66 struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg)); 67 SET_STRUCT(struct nlattr, nla, 68 .nla_len = msg_len - NLMSG_SPACE(hdrlen), 69 .nla_type = IFLA_XDP 70 ); 71 } 72 73 static void 74 print_ifinfomsg(const unsigned int msg_len) 75 { 76 printf("{len=%u, type=RTM_GETLINK, flags=NLM_F_DUMP" 77 ", seq=0, pid=0}, {ifi_family=AF_UNIX" 78 ", ifi_type=ARPHRD_LOOPBACK" 79 ", ifi_index=" IFINDEX_LO_STR 80 ", ifi_flags=IFF_UP, ifi_change=0}" 81 ", {{nla_len=%u, nla_type=IFLA_XDP}", 82 msg_len, msg_len - NLMSG_SPACE(hdrlen)); 83 } 84 85 int 86 main(void) 87 { 88 skip_if_unavailable("/proc/self/fd/"); 89 90 const int fd = create_nl_socket(NETLINK_ROUTE); 91 void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen)); 92 93 static char pattern[4096]; 94 fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1); 95 96 const int32_t num = 0xabacdbcd; 97 TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen, 98 init_ifinfomsg, print_ifinfomsg, 99 IFLA_XDP_FD, pattern, num, 100 printf("%d", num)); 101 102 #ifdef XDP_FLAGS_UPDATE_IF_NOEXIST 103 const uint32_t flags = XDP_FLAGS_UPDATE_IF_NOEXIST; 104 TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen, 105 init_ifinfomsg, print_ifinfomsg, 106 IFLA_XDP_FLAGS, pattern, flags, 107 printf("XDP_FLAGS_UPDATE_IF_NOEXIST")); 108 #endif 109 110 puts("+++ exited with 0 +++"); 111 return 0; 112 } 113
