1 /* 2 * tst-rcv-own-msgs.c 3 * 4 * Copyright (c) 2010 Volkswagen Group Electronic Research 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. Neither the name of Volkswagen nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * Alternatively, provided that this notice is retained in full, this 20 * software may be distributed under the terms of the GNU General 21 * Public License ("GPL") version 2, in which case the provisions of the 22 * GPL apply INSTEAD OF those given above. 23 * 24 * The provided data structures and external interfaces from this code 25 * are not restricted to be used by modules with a GPL compatible license. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 38 * DAMAGE. 39 * 40 * Send feedback to <socketcan-users (at) lists.berlios.de> 41 * 42 */ 43 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #include <string.h> 48 49 #include <sys/types.h> 50 #include <sys/socket.h> 51 #include <sys/ioctl.h> 52 #include <sys/time.h> 53 #include <net/if.h> 54 #include "config.h" 55 #include "tst_res_flags.h" 56 #include "tst_minmax.h" 57 58 #ifdef HAVE_LINUX_CAN_H 59 60 #include <linux/can.h> 61 #include <linux/can/raw.h> 62 63 struct rxs { 64 int s; 65 int t; 66 }; 67 68 struct rxs test_sockets(int s, int t, canid_t can_id) 69 { 70 fd_set rdfs; 71 struct timeval tv; 72 int m = MAX(s, t) + 1; 73 int have_rx = 1; 74 struct can_frame frame; 75 struct rxs rx; 76 int ret; 77 78 frame.can_id = can_id; 79 frame.can_dlc = 0; 80 if (write(s, &frame, sizeof(frame)) < 0) { 81 perror("write"); 82 exit(1); 83 } 84 85 rx.s = rx.t = 0; 86 87 while (have_rx) { 88 89 FD_ZERO(&rdfs); 90 FD_SET(s, &rdfs); 91 FD_SET(t, &rdfs); 92 tv.tv_sec = 0; 93 tv.tv_usec = 50000; /* 50ms timeout */ 94 have_rx = 0; 95 96 ret = select(m, &rdfs, NULL, NULL, &tv); 97 if (ret < 0) { 98 perror("select"); 99 exit(1); 100 } 101 102 if (FD_ISSET(s, &rdfs)) { 103 104 have_rx = 1; 105 ret = read(s, &frame, sizeof(struct can_frame)); 106 if (ret < 0) { 107 perror("read"); 108 exit(1); 109 } 110 if (frame.can_id != can_id) { 111 fprintf(stderr, "received wrong can_id!\n"); 112 exit(1); 113 } 114 rx.s++; 115 } 116 117 if (FD_ISSET(t, &rdfs)) { 118 119 have_rx = 1; 120 ret = read(t, &frame, sizeof(struct can_frame)); 121 if (ret < 0) { 122 perror("read"); 123 exit(1); 124 } 125 if (frame.can_id != can_id) { 126 fprintf(stderr, "received wrong can_id!\n"); 127 exit(1); 128 } 129 rx.t++; 130 } 131 } 132 133 /* timeout */ 134 135 return rx; 136 } 137 138 void setopts(int s, int loopback, int recv_own_msgs) 139 { 140 setsockopt(s, SOL_CAN_RAW, CAN_RAW_LOOPBACK, &loopback, 141 sizeof(loopback)); 142 setsockopt(s, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS, &recv_own_msgs, 143 sizeof(recv_own_msgs)); 144 145 printf("check loopback %d recv_own_msgs %d ... ", loopback, 146 recv_own_msgs); 147 } 148 149 int main(int argc, char **argv) 150 { 151 int s, t; 152 struct sockaddr_can addr; 153 struct ifreq ifr; 154 struct rxs rx; 155 156 /* check command line options */ 157 if (argc != 2) { 158 fprintf(stderr, "Usage: %s <device>\n", argv[0]); 159 return TFAIL; 160 } 161 162 s = socket(PF_CAN, SOCK_RAW, CAN_RAW); 163 if (s < 0) { 164 perror("socket"); 165 return TFAIL; 166 } 167 t = socket(PF_CAN, SOCK_RAW, CAN_RAW); 168 if (t < 0) { 169 perror("socket"); 170 return TFAIL; 171 } 172 173 strcpy(ifr.ifr_name, argv[1]); 174 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) { 175 perror("SIOCGIFINDEX"); 176 return TFAIL; 177 } 178 addr.can_ifindex = ifr.ifr_ifindex; 179 addr.can_family = AF_CAN; 180 181 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) { 182 perror("bind"); 183 return TFAIL; 184 } 185 if (bind(t, (struct sockaddr *)&addr, sizeof(addr)) < 0) { 186 perror("bind"); 187 return TFAIL; 188 } 189 190 printf("Starting PF_CAN frame flow test.\n"); 191 printf("checking socket default settings ... "); 192 rx = test_sockets(s, t, 0x340); 193 if (rx.s == 0 && rx.t == 1) 194 printf("ok.\n"); 195 else { 196 printf("failure!\n"); 197 return TFAIL; 198 } 199 200 /* check loopback 0 recv_own_msgs 0 */ 201 setopts(s, 0, 0); 202 rx = test_sockets(s, t, 0x341); 203 if (rx.s == 0 && rx.t == 0) 204 printf("ok.\n"); 205 else { 206 printf("failure!\n"); 207 return TFAIL; 208 } 209 210 /* check loopback 0 recv_own_msgs 1 */ 211 setopts(s, 0, 1); 212 rx = test_sockets(s, t, 0x342); 213 if (rx.s == 0 && rx.t == 0) 214 printf("ok.\n"); 215 else { 216 printf("failure!\n"); 217 return TFAIL; 218 } 219 220 /* check loopback 1 recv_own_msgs 0 */ 221 setopts(s, 1, 0); 222 rx = test_sockets(s, t, 0x343); 223 if (rx.s == 0 && rx.t == 1) 224 printf("ok.\n"); 225 else { 226 printf("failure!\n"); 227 return TFAIL; 228 } 229 230 /* check loopback 1 recv_own_msgs 1 */ 231 setopts(s, 1, 1); 232 rx = test_sockets(s, t, 0x344); 233 if (rx.s == 1 && rx.t == 1) 234 printf("ok.\n"); 235 else { 236 printf("failure!\n"); 237 return TFAIL; 238 } 239 240 printf("PF_CAN frame flow test was successful.\n"); 241 242 close(s); 243 close(t); 244 245 return TPASS; 246 } 247 248 #else 249 250 int main(void) 251 { 252 printf("The linux/can.h was missing upon compilation.\n"); 253 return TCONF; 254 } 255 256 #endif /* HAVE_LINUX_CAN_H */ 257
