1 /* 2 * Copyright (c) 2016 Fabien Siron <fabien.siron (at) epita.fr> 3 * Copyright (c) 2017 JingPiao Chen <chenjingpiao (at) gmail.com> 4 * Copyright (c) 2017-2018 The strace developers. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "defs.h" 31 #include "netlink.h" 32 #include "netlink_sock_diag.h" 33 #include "nlattr.h" 34 #include "print_fields.h" 35 36 #include <linux/sock_diag.h> 37 #include <linux/netlink_diag.h> 38 39 #include "xlat/netlink_diag_attrs.h" 40 #include "xlat/netlink_diag_show.h" 41 #include "xlat/netlink_socket_flags.h" 42 #include "xlat/netlink_states.h" 43 44 DECL_NETLINK_DIAG_DECODER(decode_netlink_diag_req) 45 { 46 struct netlink_diag_req req = { .sdiag_family = family }; 47 const size_t offset = sizeof(req.sdiag_family); 48 49 PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???"); 50 tprints(", "); 51 if (len >= sizeof(req)) { 52 if (!umoven_or_printaddr(tcp, addr + offset, 53 sizeof(req) - offset, 54 (char *) &req + offset)) { 55 if (NDIAG_PROTO_ALL == req.sdiag_protocol) 56 tprintf("%s=%s", 57 "sdiag_protocol", "NDIAG_PROTO_ALL"); 58 else 59 PRINT_FIELD_XVAL("", req, sdiag_protocol, 60 netlink_protocols, 61 "NETLINK_???"); 62 PRINT_FIELD_U(", ", req, ndiag_ino); 63 PRINT_FIELD_FLAGS(", ", req, ndiag_show, 64 netlink_diag_show, "NDIAG_SHOW_???"); 65 PRINT_FIELD_COOKIE(", ", req, ndiag_cookie); 66 } 67 } else 68 tprints("..."); 69 tprints("}"); 70 } 71 72 static bool 73 print_group(struct tcb *const tcp, 74 void *const elem_buf, 75 const size_t elem_size, 76 void *const opaque_data) 77 { 78 if (elem_size < sizeof(kernel_ulong_t)) 79 tprintf("%#0*x", (int) elem_size * 2 + 2, 80 *(unsigned int *) elem_buf); 81 else 82 tprintf("%#0*" PRI_klx, (int) elem_size * 2 + 2, 83 *(kernel_ulong_t *) elem_buf); 84 85 return true; 86 } 87 88 static bool 89 decode_netlink_diag_groups(struct tcb *const tcp, 90 const kernel_ulong_t addr, 91 const unsigned int len, 92 const void *const opaque_data) 93 { 94 kernel_ulong_t buf; 95 const size_t nmemb = len / current_wordsize; 96 97 if (!nmemb) 98 return false; 99 100 print_array(tcp, addr, nmemb, &buf, current_wordsize, 101 umoven_or_printaddr, print_group, 0); 102 103 return true; 104 } 105 106 static bool 107 decode_netlink_diag_ring(struct tcb *const tcp, 108 const kernel_ulong_t addr, 109 const unsigned int len, 110 const void *const opaque_data) 111 { 112 struct netlink_diag_ring ndr; 113 114 if (len < sizeof(ndr)) 115 return false; 116 if (umove_or_printaddr(tcp, addr, &ndr)) 117 return true; 118 119 PRINT_FIELD_U("{", ndr, ndr_block_size); 120 PRINT_FIELD_U(", ", ndr, ndr_block_nr); 121 PRINT_FIELD_U(", ", ndr, ndr_frame_size); 122 PRINT_FIELD_U(", ", ndr, ndr_frame_nr); 123 tprints("}"); 124 125 return true; 126 } 127 128 static bool 129 decode_netlink_diag_flags(struct tcb *const tcp, 130 const kernel_ulong_t addr, 131 const unsigned int len, 132 const void *const opaque_data) 133 { 134 uint32_t flags; 135 136 if (len < sizeof(flags)) 137 return false; 138 if (umove_or_printaddr(tcp, addr, &flags)) 139 return true; 140 141 printflags(netlink_socket_flags, flags, "NDIAG_FLAG_???"); 142 143 return true; 144 } 145 146 static const nla_decoder_t netlink_diag_msg_nla_decoders[] = { 147 [NETLINK_DIAG_MEMINFO] = decode_nla_meminfo, 148 [NETLINK_DIAG_GROUPS] = decode_netlink_diag_groups, 149 [NETLINK_DIAG_RX_RING] = decode_netlink_diag_ring, 150 [NETLINK_DIAG_TX_RING] = decode_netlink_diag_ring, 151 [NETLINK_DIAG_FLAGS] = decode_netlink_diag_flags 152 }; 153 154 DECL_NETLINK_DIAG_DECODER(decode_netlink_diag_msg) 155 { 156 struct netlink_diag_msg msg = { .ndiag_family = family }; 157 size_t offset = sizeof(msg.ndiag_family); 158 bool decode_nla = false; 159 160 PRINT_FIELD_XVAL("{", msg, ndiag_family, addrfams, "AF_???"); 161 tprints(", "); 162 if (len >= sizeof(msg)) { 163 if (!umoven_or_printaddr(tcp, addr + offset, 164 sizeof(msg) - offset, 165 (char *) &msg + offset)) { 166 PRINT_FIELD_XVAL("", msg, ndiag_type, 167 socktypes, "SOCK_???"); 168 PRINT_FIELD_XVAL(", ", msg, ndiag_protocol, 169 netlink_protocols, "NETLINK_???"); 170 PRINT_FIELD_XVAL(", ", msg, ndiag_state, 171 netlink_states, "NETLINK_???"); 172 PRINT_FIELD_U(", ", msg, ndiag_portid); 173 PRINT_FIELD_U(", ", msg, ndiag_dst_portid); 174 PRINT_FIELD_U(", ", msg, ndiag_dst_group); 175 PRINT_FIELD_U(", ", msg, ndiag_ino); 176 PRINT_FIELD_COOKIE(", ", msg, ndiag_cookie); 177 decode_nla = true; 178 } 179 } else 180 tprints("..."); 181 tprints("}"); 182 183 offset = NLMSG_ALIGN(sizeof(msg)); 184 if (decode_nla && len > offset) { 185 tprints(", "); 186 decode_nlattr(tcp, addr + offset, len - offset, 187 netlink_diag_attrs, "NETLINK_DIAG_???", 188 netlink_diag_msg_nla_decoders, 189 ARRAY_SIZE(netlink_diag_msg_nla_decoders), NULL); 190 } 191 } 192
