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/filter.h> 37 #include <linux/sock_diag.h> 38 #include <linux/packet_diag.h> 39 40 #include "xlat/packet_diag_attrs.h" 41 #include "xlat/packet_diag_info_flags.h" 42 #include "xlat/packet_diag_show.h" 43 44 DECL_NETLINK_DIAG_DECODER(decode_packet_diag_req) 45 { 46 struct packet_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 PRINT_FIELD_XVAL("", req, sdiag_protocol, 56 ethernet_protocols, "ETH_P_???"); 57 PRINT_FIELD_U(", ", req, pdiag_ino); 58 PRINT_FIELD_FLAGS(", ", req, pdiag_show, 59 packet_diag_show, "PACKET_SHOW_???"); 60 PRINT_FIELD_COOKIE(", ", req, pdiag_cookie); 61 } 62 } else 63 tprints("..."); 64 tprints("}"); 65 } 66 67 static bool 68 decode_packet_diag_info(struct tcb *const tcp, 69 const kernel_ulong_t addr, 70 const unsigned int len, 71 const void *const opaque_data) 72 { 73 struct packet_diag_info pinfo; 74 75 if (len < sizeof(pinfo)) 76 return false; 77 if (umove_or_printaddr(tcp, addr, &pinfo)) 78 return true; 79 80 PRINT_FIELD_U("{", pinfo, pdi_index); 81 PRINT_FIELD_U(", ", pinfo, pdi_version); 82 PRINT_FIELD_U(", ", pinfo, pdi_reserve); 83 PRINT_FIELD_U(", ", pinfo, pdi_copy_thresh); 84 PRINT_FIELD_U(", ", pinfo, pdi_tstamp); 85 PRINT_FIELD_FLAGS(", ", pinfo, pdi_flags, 86 packet_diag_info_flags, "PDI_???"); 87 tprints("}"); 88 89 return true; 90 } 91 92 static bool 93 print_packet_diag_mclist(struct tcb *const tcp, void *const elem_buf, 94 const size_t elem_size, void *const opaque_data) 95 { 96 struct packet_diag_mclist *dml = elem_buf; 97 uint16_t alen = dml->pdmc_alen > sizeof(dml->pdmc_addr) ? 98 sizeof(dml->pdmc_addr) : dml->pdmc_alen; 99 100 PRINT_FIELD_IFINDEX("{", *dml, pdmc_index); 101 PRINT_FIELD_U(", ", *dml, pdmc_count); 102 PRINT_FIELD_U(", ", *dml, pdmc_type); 103 PRINT_FIELD_U(", ", *dml, pdmc_alen); 104 PRINT_FIELD_STRING(", ", *dml, pdmc_addr, alen, QUOTE_FORCE_HEX); 105 tprints("}"); 106 107 return true; 108 } 109 110 static bool 111 decode_packet_diag_mclist(struct tcb *const tcp, 112 const kernel_ulong_t addr, 113 const unsigned int len, 114 const void *const opaque_data) 115 { 116 struct packet_diag_mclist dml; 117 const size_t nmemb = len / sizeof(dml); 118 119 if (!nmemb) 120 return false; 121 122 print_array(tcp, addr, nmemb, &dml, sizeof(dml), 123 umoven_or_printaddr, print_packet_diag_mclist, 0); 124 125 return true; 126 } 127 128 static bool 129 decode_packet_diag_ring(struct tcb *const tcp, 130 const kernel_ulong_t addr, 131 const unsigned int len, 132 const void *const opaque_data) 133 { 134 struct packet_diag_ring pdr; 135 136 if (len < sizeof(pdr)) 137 return false; 138 if (umove_or_printaddr(tcp, addr, &pdr)) 139 return true; 140 141 PRINT_FIELD_U("{", pdr, pdr_block_size); 142 PRINT_FIELD_U(", ", pdr, pdr_block_nr); 143 PRINT_FIELD_U(", ", pdr, pdr_frame_size); 144 PRINT_FIELD_U(", ", pdr, pdr_frame_nr); 145 PRINT_FIELD_U(", ", pdr, pdr_retire_tmo); 146 PRINT_FIELD_U(", ", pdr, pdr_sizeof_priv); 147 PRINT_FIELD_U(", ", pdr, pdr_features); 148 tprints("}"); 149 150 return true; 151 } 152 153 static bool 154 decode_packet_diag_filter(struct tcb *const tcp, 155 const kernel_ulong_t addr, 156 const unsigned int len, 157 const void *const opaque_data) 158 { 159 const unsigned int nmemb = len / sizeof(struct sock_filter); 160 if (!nmemb || (unsigned short) nmemb != nmemb) 161 return false; 162 163 print_sock_fprog(tcp, addr, nmemb); 164 165 return true; 166 } 167 168 static const nla_decoder_t packet_diag_msg_nla_decoders[] = { 169 [PACKET_DIAG_INFO] = decode_packet_diag_info, 170 [PACKET_DIAG_MCLIST] = decode_packet_diag_mclist, 171 [PACKET_DIAG_RX_RING] = decode_packet_diag_ring, 172 [PACKET_DIAG_TX_RING] = decode_packet_diag_ring, 173 [PACKET_DIAG_FANOUT] = decode_nla_u32, 174 [PACKET_DIAG_UID] = decode_nla_u32, 175 [PACKET_DIAG_MEMINFO] = decode_nla_meminfo, 176 [PACKET_DIAG_FILTER] = decode_packet_diag_filter 177 }; 178 179 DECL_NETLINK_DIAG_DECODER(decode_packet_diag_msg) 180 { 181 struct packet_diag_msg msg = { .pdiag_family = family }; 182 size_t offset = sizeof(msg.pdiag_family); 183 bool decode_nla = false; 184 185 PRINT_FIELD_XVAL("{", msg, pdiag_family, addrfams, "AF_???"); 186 tprints(", "); 187 if (len >= sizeof(msg)) { 188 if (!umoven_or_printaddr(tcp, addr + offset, 189 sizeof(msg) - offset, 190 (char *) &msg + offset)) { 191 PRINT_FIELD_XVAL("", msg, pdiag_type, 192 socktypes, "SOCK_???"); 193 PRINT_FIELD_U(", ", msg, pdiag_num); 194 PRINT_FIELD_U(", ", msg, pdiag_ino); 195 PRINT_FIELD_COOKIE(", ", msg, pdiag_cookie); 196 decode_nla = true; 197 } 198 } else 199 tprints("..."); 200 tprints("}"); 201 202 offset = NLMSG_ALIGN(sizeof(msg)); 203 if (decode_nla && len > offset) { 204 tprints(", "); 205 decode_nlattr(tcp, addr + offset, len - offset, 206 packet_diag_attrs, "PACKET_DIAG_???", 207 packet_diag_msg_nla_decoders, 208 ARRAY_SIZE(packet_diag_msg_nla_decoders), NULL); 209 } 210 } 211
