1 /*
2 * tst-filter.c
3 *
4 * Copyright (c) 2011 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@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
57 #ifdef HAVE_LINUX_CAN_H
58
59 #include <linux/can.h>
60 #include <linux/can/raw.h>
61
62 #define ID 0x123
63 #define TC 18 /* # of testcases */
64
65 const int rx_res[TC] = { 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1 };
66 const int rxbits_res[TC] = { 4369, 4369, 4369, 4369, 17, 4352, 17, 4352, 257,
67 257, 4112, 4112, 1, 256, 16, 4096, 1, 256 };
68
calc_id(int testcase)69 canid_t calc_id(int testcase)
70 {
71 canid_t id = ID;
72
73 if (testcase & 1)
74 id |= CAN_EFF_FLAG;
75 if (testcase & 2)
76 id |= CAN_RTR_FLAG;
77
78 return id;
79 }
80
calc_mask(int testcase)81 canid_t calc_mask(int testcase)
82 {
83 canid_t mask = CAN_SFF_MASK;
84
85 if (testcase > 15)
86 return CAN_EFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG;
87
88 if (testcase & 4)
89 mask |= CAN_EFF_FLAG;
90 if (testcase & 8)
91 mask |= CAN_RTR_FLAG;
92
93 return mask;
94 }
95
main(int argc,char ** argv)96 int main(int argc, char **argv)
97 {
98 fd_set rdfs;
99 struct timeval tv;
100 int s;
101 struct sockaddr_can addr;
102 struct can_filter rfilter;
103 struct can_frame frame;
104 int testcase;
105 int have_rx;
106 int rx;
107 int rxbits, rxbitval;
108 int ret;
109 int recv_own_msgs = 1;
110 struct ifreq ifr;
111
112 /* check command line options */
113 if (argc != 2) {
114 fprintf(stderr, "Usage: %s <device>\n", argv[0]);
115 return TFAIL;
116 }
117
118 s = socket(PF_CAN, SOCK_RAW, CAN_RAW);
119 if (s < 0) {
120 perror("socket");
121 return TFAIL;
122 }
123
124 strcpy(ifr.ifr_name, argv[1]);
125 if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
126 perror("SIOCGIFINDEX");
127 return TFAIL;
128 }
129 addr.can_family = AF_CAN;
130 addr.can_ifindex = ifr.ifr_ifindex;
131
132 setsockopt(s, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS,
133 &recv_own_msgs, sizeof(recv_own_msgs));
134
135 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
136 perror("bind");
137 return TFAIL;
138 }
139
140 printf("---\n");
141
142 for (testcase = 0; testcase < TC; testcase++) {
143
144 rfilter.can_id = calc_id(testcase);
145 rfilter.can_mask = calc_mask(testcase);
146 setsockopt(s, SOL_CAN_RAW, CAN_RAW_FILTER,
147 &rfilter, sizeof(rfilter));
148
149 printf("testcase %2d filters : can_id = 0x%08X can_mask = "
150 "0x%08X\n", testcase, rfilter.can_id, rfilter.can_mask);
151
152 printf("testcase %2d sending patterns ... ", testcase);
153
154 frame.can_dlc = 1;
155 frame.data[0] = testcase;
156
157 frame.can_id = ID;
158 if (write(s, &frame, sizeof(frame)) < 0) {
159 perror("write");
160 exit(1);
161 }
162 frame.can_id = (ID | CAN_RTR_FLAG);
163 if (write(s, &frame, sizeof(frame)) < 0) {
164 perror("write");
165 exit(1);
166 }
167 frame.can_id = (ID | CAN_EFF_FLAG);
168 if (write(s, &frame, sizeof(frame)) < 0) {
169 perror("write");
170 exit(1);
171 }
172 frame.can_id = (ID | CAN_EFF_FLAG | CAN_RTR_FLAG);
173 if (write(s, &frame, sizeof(frame)) < 0) {
174 perror("write");
175 exit(1);
176 }
177
178 printf("ok\n");
179
180 have_rx = 1;
181 rx = 0;
182 rxbits = 0;
183
184 while (have_rx) {
185
186 have_rx = 0;
187 FD_ZERO(&rdfs);
188 FD_SET(s, &rdfs);
189 tv.tv_sec = 0;
190 tv.tv_usec = 50000; /* 50ms timeout */
191
192 ret = select(s + 1, &rdfs, NULL, NULL, &tv);
193 if (ret < 0) {
194 perror("select");
195 exit(1);
196 }
197
198 if (FD_ISSET(s, &rdfs)) {
199 have_rx = 1;
200 ret = read(s, &frame, sizeof(struct can_frame));
201 if (ret < 0) {
202 perror("read");
203 exit(1);
204 }
205 if ((frame.can_id & CAN_SFF_MASK) != ID) {
206 fprintf(stderr,
207 "received wrong can_id!\n");
208 exit(1);
209 }
210 if (frame.data[0] != testcase) {
211 fprintf(stderr,
212 "received wrong testcase!\n");
213 exit(1);
214 }
215
216 /* test & calc rxbits */
217 rxbitval = 1 << ((frame.can_id &
218 (CAN_EFF_FLAG | CAN_RTR_FLAG |
219 CAN_ERR_FLAG)) >> 28);
220
221 /* only receive a rxbitval once */
222 if ((rxbits & rxbitval) == rxbitval) {
223 fprintf(stderr,
224 "received rxbitval %d twice!\n",
225 rxbitval);
226 exit(1);
227 }
228 rxbits |= rxbitval;
229 rx++;
230
231 printf("testcase %2d rx : can_id = 0x%08X rx = "
232 "%d rxbits = %d\n", testcase,
233 frame.can_id, rx, rxbits);
234 }
235 }
236 /* rx timed out -> check the received results */
237 if (rx_res[testcase] != rx) {
238 fprintf(stderr,
239 "wrong rx value in testcase %d : %d (expected "
240 "%d)\n", testcase, rx, rx_res[testcase]);
241 exit(1);
242 }
243 if (rxbits_res[testcase] != rxbits) {
244 fprintf(stderr,
245 "wrong rxbits value in testcase %d : %d "
246 "(expected %d)\n", testcase, rxbits,
247 rxbits_res[testcase]);
248 exit(1);
249 }
250 printf("testcase %2d ok\n---\n", testcase);
251 }
252
253 close(s);
254
255 return TPASS;
256 }
257
258 #else
259
main(void)260 int main(void)
261 {
262 printf("The linux/can.h was missing upon compilation.\n");
263 return TCONF;
264 }
265
266 #endif /* HAVE_LINUX_CAN_H */
267