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 #include <stdio.h> 32 #include <string.h> 33 #include <arpa/inet.h> 34 #include <net/if.h> 35 #include <netinet/tcp.h> 36 #include "test_nlattr.h" 37 #include <linux/inet_diag.h> 38 #include <linux/sock_diag.h> 39 40 static const char * const sk_meminfo_strs[] = { 41 "SK_MEMINFO_RMEM_ALLOC", 42 "SK_MEMINFO_RCVBUF", 43 "SK_MEMINFO_WMEM_ALLOC", 44 "SK_MEMINFO_SNDBUF", 45 "SK_MEMINFO_FWD_ALLOC", 46 "SK_MEMINFO_WMEM_QUEUED", 47 "SK_MEMINFO_OPTMEM", 48 "SK_MEMINFO_BACKLOG", 49 "SK_MEMINFO_DROPS", 50 }; 51 52 static const char address[] = "10.11.12.13"; 53 54 static void 55 init_inet_diag_msg(struct nlmsghdr *const nlh, const unsigned int msg_len) 56 { 57 SET_STRUCT(struct nlmsghdr, nlh, 58 .nlmsg_len = msg_len, 59 .nlmsg_type = SOCK_DIAG_BY_FAMILY, 60 .nlmsg_flags = NLM_F_DUMP 61 ); 62 63 struct inet_diag_msg *const msg = NLMSG_DATA(nlh); 64 SET_STRUCT(struct inet_diag_msg, msg, 65 .idiag_family = AF_INET, 66 .idiag_state = TCP_LISTEN, 67 .id.idiag_if = ifindex_lo() 68 ); 69 70 if (!inet_pton(AF_INET, address, msg->id.idiag_src) || 71 !inet_pton(AF_INET, address, msg->id.idiag_dst)) 72 perror_msg_and_skip("inet_pton"); 73 } 74 75 static void 76 print_inet_diag_msg(const unsigned int msg_len) 77 { 78 printf("{len=%u, type=SOCK_DIAG_BY_FAMILY" 79 ", flags=NLM_F_DUMP, seq=0, pid=0}, {idiag_family=AF_INET" 80 ", idiag_state=TCP_LISTEN, idiag_timer=0, idiag_retrans=0" 81 ", id={idiag_sport=htons(0), idiag_dport=htons(0)" 82 ", idiag_src=inet_addr(\"%s\")" 83 ", idiag_dst=inet_addr(\"%s\")" 84 ", idiag_if=" IFINDEX_LO_STR 85 ", idiag_cookie=[0, 0]}" 86 ", idiag_expires=0, idiag_rqueue=0, idiag_wqueue=0" 87 ", idiag_uid=0, idiag_inode=0}", 88 msg_len, address, address); 89 } 90 91 static void 92 print_uint(const unsigned int *p, size_t i) 93 { 94 if (i >= ARRAY_SIZE(sk_meminfo_strs)) 95 printf("[%zu /* SK_MEMINFO_??? */", i); 96 else 97 printf("[%s", sk_meminfo_strs[i]); 98 99 printf("] = %u", *p); 100 } 101 102 int 103 main(void) 104 { 105 skip_if_unavailable("/proc/self/fd/"); 106 107 static const struct inet_diag_meminfo minfo = { 108 .idiag_rmem = 0xfadcacdb, 109 .idiag_wmem = 0xbdabcada, 110 .idiag_fmem = 0xbadbfafb, 111 .idiag_tmem = 0xfdacdadf 112 }; 113 static const struct tcpvegas_info vegas = { 114 .tcpv_enabled = 0xfadcacdb, 115 .tcpv_rttcnt = 0xbdabcada, 116 .tcpv_rtt = 0xbadbfafb, 117 .tcpv_minrtt = 0xfdacdadf 118 }; 119 static const struct tcp_dctcp_info dctcp = { 120 .dctcp_enabled = 0xfdac, 121 .dctcp_ce_state = 0xfadc, 122 .dctcp_alpha = 0xbdabcada, 123 .dctcp_ab_ecn = 0xbadbfafb, 124 .dctcp_ab_tot = 0xfdacdadf 125 }; 126 static const struct tcp_bbr_info bbr = { 127 .bbr_bw_lo = 0xfdacdadf, 128 .bbr_bw_hi = 0xfadcacdb, 129 .bbr_min_rtt = 0xbdabcada, 130 .bbr_pacing_gain = 0xbadbfafb, 131 .bbr_cwnd_gain = 0xfdacdadf 132 }; 133 static const uint32_t mem[] = { 0xaffacbad, 0xffadbcab }; 134 static uint32_t bigmem[SK_MEMINFO_VARS + 1]; 135 static const uint32_t mark = 0xabdfadca; 136 static const uint8_t shutdown = 0xcd; 137 138 const int fd = create_nl_socket(NETLINK_SOCK_DIAG); 139 const unsigned int hdrlen = sizeof(struct inet_diag_msg); 140 void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), 141 NLA_HDRLEN + 142 MAX(sizeof(bigmem), DEFAULT_STRLEN)); 143 144 static char pattern[4096]; 145 fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1); 146 147 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen, 148 init_inet_diag_msg, print_inet_diag_msg, 149 INET_DIAG_MEMINFO, pattern, minfo, 150 PRINT_FIELD_U("{", minfo, idiag_rmem); 151 PRINT_FIELD_U(", ", minfo, idiag_wmem); 152 PRINT_FIELD_U(", ", minfo, idiag_fmem); 153 PRINT_FIELD_U(", ", minfo, idiag_tmem); 154 printf("}")); 155 156 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen, 157 init_inet_diag_msg, print_inet_diag_msg, 158 INET_DIAG_VEGASINFO, pattern, vegas, 159 PRINT_FIELD_U("{", vegas, tcpv_enabled); 160 PRINT_FIELD_U(", ", vegas, tcpv_rttcnt); 161 PRINT_FIELD_U(", ", vegas, tcpv_rtt); 162 PRINT_FIELD_U(", ", vegas, tcpv_minrtt); 163 printf("}")); 164 165 166 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen, 167 init_inet_diag_msg, print_inet_diag_msg, 168 INET_DIAG_DCTCPINFO, pattern, dctcp, 169 PRINT_FIELD_U("{", dctcp, dctcp_enabled); 170 PRINT_FIELD_U(", ", dctcp, dctcp_ce_state); 171 PRINT_FIELD_U(", ", dctcp, dctcp_alpha); 172 PRINT_FIELD_U(", ", dctcp, dctcp_ab_ecn); 173 PRINT_FIELD_U(", ", dctcp, dctcp_ab_tot); 174 printf("}")); 175 176 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen, 177 init_inet_diag_msg, print_inet_diag_msg, 178 INET_DIAG_BBRINFO, pattern, bbr, 179 PRINT_FIELD_X("{", bbr, bbr_bw_lo); 180 PRINT_FIELD_X(", ", bbr, bbr_bw_hi); 181 PRINT_FIELD_U(", ", bbr, bbr_min_rtt); 182 PRINT_FIELD_U(", ", bbr, bbr_pacing_gain); 183 PRINT_FIELD_U(", ", bbr, bbr_cwnd_gain); 184 printf("}")); 185 186 TEST_NLATTR_ARRAY(fd, nlh0, hdrlen, 187 init_inet_diag_msg, print_inet_diag_msg, 188 INET_DIAG_SKMEMINFO, pattern, mem, print_uint); 189 190 memcpy(bigmem, pattern, sizeof(bigmem)); 191 192 TEST_NLATTR_ARRAY(fd, nlh0, hdrlen, 193 init_inet_diag_msg, print_inet_diag_msg, 194 INET_DIAG_SKMEMINFO, pattern, bigmem, print_uint); 195 196 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen, 197 init_inet_diag_msg, print_inet_diag_msg, 198 INET_DIAG_MARK, pattern, mark, 199 printf("%u", mark)); 200 201 TEST_NLATTR_OBJECT(fd, nlh0, hdrlen, 202 init_inet_diag_msg, print_inet_diag_msg, 203 INET_DIAG_CLASS_ID, pattern, mark, 204 printf("%u", mark)); 205 206 TEST_NLATTR(fd, nlh0, hdrlen, 207 init_inet_diag_msg, print_inet_diag_msg, INET_DIAG_SHUTDOWN, 208 sizeof(shutdown), &shutdown, sizeof(shutdown), 209 printf("%u", shutdown)); 210 211 char *const str = tail_alloc(DEFAULT_STRLEN); 212 fill_memory_ex(str, DEFAULT_STRLEN, '0', 10); 213 TEST_NLATTR(fd, nlh0, hdrlen, 214 init_inet_diag_msg, print_inet_diag_msg, INET_DIAG_CONG, 215 DEFAULT_STRLEN, str, DEFAULT_STRLEN, 216 printf("\"%.*s\"...", DEFAULT_STRLEN, str)); 217 str[DEFAULT_STRLEN - 1] = '\0'; 218 TEST_NLATTR(fd, nlh0, hdrlen, 219 init_inet_diag_msg, print_inet_diag_msg, INET_DIAG_CONG, 220 DEFAULT_STRLEN, str, DEFAULT_STRLEN, 221 printf("\"%s\"", str)); 222 223 puts("+++ exited with 0 +++"); 224 return 0; 225 } 226
