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_BR_PORT_MSG 32 33 # include <stdio.h> 34 # include "test_nlattr.h" 35 # include <arpa/inet.h> 36 # include <linux/if_bridge.h> 37 # include <linux/rtnetlink.h> 38 39 # ifndef MDB_TEMPORARY 40 # define MDB_TEMPORARY 0 41 # endif 42 # ifndef MDBA_MDB_ENTRY_INFO 43 # define MDBA_MDB_ENTRY_INFO 1 44 # endif 45 # ifndef MDBA_MDB_EATTR_TIMER 46 # define MDBA_MDB_EATTR_TIMER 1 47 # endif 48 49 const unsigned int hdrlen = sizeof(struct br_port_msg); 50 51 static void 52 init_br_port_msg(struct nlmsghdr *const nlh, const unsigned int msg_len) 53 { 54 unsigned int len = msg_len; 55 56 SET_STRUCT(struct nlmsghdr, nlh, 57 .nlmsg_len = len, 58 .nlmsg_type = RTM_GETMDB, 59 .nlmsg_flags = NLM_F_DUMP 60 ); 61 62 struct br_port_msg *const msg = NLMSG_DATA(nlh); 63 SET_STRUCT(struct br_port_msg, msg, 64 .family = AF_UNIX, 65 .ifindex = ifindex_lo() 66 ); 67 68 struct nlattr *nla = NLMSG_ATTR(nlh, sizeof(*msg)); 69 len -= NLMSG_SPACE(hdrlen); 70 SET_STRUCT(struct nlattr, nla, 71 .nla_len = len, 72 .nla_type = MDBA_MDB 73 ); 74 75 nla = nla + 1; 76 len -= NLA_HDRLEN; 77 SET_STRUCT(struct nlattr, nla, 78 .nla_len = len, 79 .nla_type = MDBA_MDB_ENTRY 80 ); 81 } 82 83 static void 84 print_br_port_msg(const unsigned int msg_len) 85 { 86 printf("{len=%u, type=RTM_GETMDB, flags=NLM_F_DUMP" 87 ", seq=0, pid=0}, {family=AF_UNIX" 88 ", ifindex=" IFINDEX_LO_STR "}" 89 ", {{nla_len=%u, nla_type=MDBA_MDB}" 90 ", {{nla_len=%u, nla_type=MDBA_MDB_ENTRY}", 91 msg_len, msg_len - NLMSG_SPACE(hdrlen), 92 msg_len - NLMSG_SPACE(hdrlen) - NLA_HDRLEN); 93 } 94 95 int 96 main(void) 97 { 98 skip_if_unavailable("/proc/self/fd/"); 99 100 const int fd = create_nl_socket(NETLINK_ROUTE); 101 102 void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 4 103 # ifdef HAVE_STRUCT_BR_MDB_ENTRY 104 - 4 + NLA_HDRLEN * 2 + sizeof(struct nlattr) 105 + sizeof(struct br_mdb_entry) 106 # endif 107 ); 108 109 static char pattern[4096]; 110 fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1); 111 112 const unsigned int nla_type = 0xffff & NLA_TYPE_MASK; 113 char nla_type_str[256]; 114 sprintf(nla_type_str, "%#x /* MDBA_MDB_ENTRY_??? */", nla_type); 115 TEST_NLATTR_(fd, nlh0 - NLA_HDRLEN * 2, hdrlen + NLA_HDRLEN * 2, 116 init_br_port_msg, print_br_port_msg, 117 nla_type, nla_type_str, 118 4, pattern, 4, 119 print_quoted_hex(pattern, 4); 120 printf("}}")); 121 122 # ifdef HAVE_STRUCT_BR_MDB_ENTRY 123 struct br_mdb_entry entry = { 124 .ifindex = ifindex_lo(), 125 .state = MDB_TEMPORARY, 126 # ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS 127 .flags = MDB_FLAGS_OFFLOAD, 128 # endif 129 # ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID 130 .vid = 0xcdef, 131 # endif 132 .addr = { 133 .proto = htons(AF_UNSPEC) 134 } 135 }; 136 137 memcpy(&entry.addr.u, pattern, sizeof(entry.addr.u)); 138 TEST_NESTED_NLATTR_OBJECT_EX(fd, nlh0, hdrlen, 139 init_br_port_msg, print_br_port_msg, 140 MDBA_MDB_ENTRY_INFO, pattern, entry, 2, 141 printf("{ifindex=" IFINDEX_LO_STR); 142 printf(", state=MDB_TEMPORARY"); 143 # ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS 144 printf(", flags=MDB_FLAGS_OFFLOAD"); 145 # endif 146 # ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID 147 PRINT_FIELD_U(", ", entry, vid); 148 # endif 149 printf(", addr={u="); 150 print_quoted_hex(&entry.addr.u, 151 sizeof(entry.addr.u)); 152 printf(", proto=htons(AF_UNSPEC)}}")); 153 154 static const struct nlattr nla = { 155 .nla_len = sizeof(nla), 156 .nla_type = MDBA_MDB_EATTR_TIMER 157 }; 158 char buf[NLMSG_ALIGN(sizeof(entry)) + sizeof(nla)]; 159 memcpy(buf, &entry, sizeof(entry)); 160 memcpy(buf + NLMSG_ALIGN(sizeof(entry)), &nla, sizeof(nla)); 161 TEST_NLATTR(fd, nlh0 - NLA_HDRLEN * 2, hdrlen + NLA_HDRLEN * 2, 162 init_br_port_msg, print_br_port_msg, 163 MDBA_MDB_ENTRY_INFO, sizeof(buf), buf, sizeof(buf), 164 printf("{ifindex=" IFINDEX_LO_STR); 165 printf(", state=MDB_TEMPORARY"); 166 # ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS 167 printf(", flags=MDB_FLAGS_OFFLOAD"); 168 # endif 169 # ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID 170 PRINT_FIELD_U(", ", entry, vid); 171 # endif 172 printf(", addr={u="); 173 print_quoted_hex(&entry.addr.u, sizeof(entry.addr.u)); 174 printf(", proto=htons(AF_UNSPEC)}}" 175 ", {nla_len=%u, nla_type=MDBA_MDB_EATTR_TIMER}}}", 176 nla.nla_len)); 177 # endif /* HAVE_STRUCT_BR_MDB_ENTRY */ 178 179 puts("+++ exited with 0 +++"); 180 return 0; 181 } 182 183 #else 184 185 SKIP_MAIN_UNDEFINED("HAVE_STRUCT_BR_PORT_MSG") 186 187 #endif 188
