xref: /freebsd/tools/test/netfibs/reflect.c (revision aca5021d5f7dcab1e11692923266373e35322d9a)
1 /*-
2  * Copyright (c) 2012 Cisco Systems, Inc.
3  * All rights reserved.
4  *
5  * This software was developed by Bjoern Zeeb under contract to
6  * Cisco Systems, Inc..
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 #include <sys/socket.h>
33 #include <sys/types.h>
34 
35 #include <arpa/inet.h>
36 
37 #include <netinet/in.h>
38 
39 
40 #include <err.h>
41 #include <errno.h>
42 #include <limits.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <sysexits.h>
47 #include <unistd.h>
48 
49 static char *testcase;
50 static int accepts;
51 static int debug;
52 static u_int fib = -1;
53 static u_int reflectfib = -1;
54 static uint16_t port = 6666;
55 static char *addr;
56 static int nostart;
57 
58 static int
59 reflect_conn(int s, char *buf, size_t buflen, ssize_t l, struct sockaddr *sa,
60     socklen_t salen)
61 {
62 	ssize_t m;
63 
64 	if (l == -1)
65 		err(EX_OSERR, "read()");
66 	if (l == 0)
67 		errx(EX_NOINPUT, "EOF");
68 	if ((size_t)l > (buflen - 1))
69 		errx(EX_DATAERR, "Input too long");
70 	/* Nuke the \n from echo | netcat. */
71 	buf[l-1] = '\0';
72 
73 	/*
74 	 * Match three cases: (1) START, (2) DONE, (3) anything else.
75 	 * For anything but START and DONE we just reflect everything.
76 	 */
77 	/*
78 	 * We expected a "START testcase" on first connect.  Otherwise it means
79 	 * that we are out of sync.  Exit to not produce weird results.
80 	 */
81 	if (accepts == 0 && nostart == 0) {
82 		if (strncmp(buf, "START ", 6) != 0)
83 			errx(EX_PROTOCOL, "Not received START on first "
84 			    "connect: %s", buf);
85 		if (l < 8)
86 			errx(EX_PROTOCOL, "START without test case name: %s",
87 			    buf);
88 		if (strcmp(buf+6, testcase) != 0)
89 			errx(EX_PROTOCOL, "START test case does not match "
90 			    "'%s': '%s'", testcase, buf+6);
91 	}
92 	/* If debug is on, log. */
93 	if (debug > 0)
94 		fprintf(stderr, "<< %s: %s\n", testcase, buf);
95 
96 	if (reflectfib != (u_int)-1)
97 		l = snprintf(buf, sizeof(buf), "FIB %u\n", reflectfib);
98 
99 	/* If debug is on, log. */
100 	if (debug > 0) {
101 		buf[l-1] = '\0';
102 		fprintf(stderr, ">> %s: %s\n", testcase, buf);
103 	}
104 
105 	/* Reflect data with \n again. */
106 	buf[l-1] = '\n';
107 
108 	if (sa != NULL) {
109 		m = sendto(s, buf, l, 0, sa, salen);
110 	} else
111 		m = write(s, buf, l);
112 	/* XXX This is simplified handling. */
113 	if (m == -1 && sa != NULL && errno == EHOSTUNREACH)
114 		warn("ignored expected: sendto(%s, %zd)", buf, l);
115 	else if (m == -1 && (sa == NULL || errno != EHOSTUNREACH))
116 		err(EX_OSERR, "write(%s, %zd)", buf, l);
117 	else if (m != l)
118 		err(EX_OSERR, "short write(%s, %zd) %zd", buf, l, m);
119 
120 
121 	accepts++;
122 
123 	/* See if we got an end signal. */
124 	if (strncmp(buf, "DONE", 4) == 0)
125 		return (-2);
126 	return (0);
127 }
128 
129 static int
130 reflect_tcp6_conn(int as)
131 {
132 	char buf[1500];
133 	ssize_t l;
134 	int error, s;
135 
136 	s = accept(as, NULL, NULL);
137 	if (s == -1)
138 		err(EX_OSERR, "accept()");
139 
140 	l = read(s, buf, sizeof(buf));
141 	error = reflect_conn(s, buf, sizeof(buf), l, NULL, 0);
142 	close(s);
143 
144 	return (error);
145 }
146 
147 static int
148 reflect_udp6_conn(int s)
149 {
150 	char buf[1500];
151 	struct sockaddr_in6 from;
152 	socklen_t fromlen;
153 	ssize_t l;
154 	int error;
155 
156 	fromlen = sizeof(from);
157 	l = recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr *)&from,
158 	    &fromlen);
159 #if 0
160 	if (l != -1) {
161 		rc = connect(s, (struct sockaddr *)&from, fromlen);
162 		if (rc == -1) {
163 			if (inet_ntop(PF_INET6, &from, buf, sizeof(buf)) == NULL)
164 				buf[0] = '\0';
165 			err(EX_OSERR, "connect(%d, %s, %u)", s, buf, fromlen);
166 		}
167 	}
168 #endif
169 	error = reflect_conn(s, buf, sizeof(buf), l, (struct sockaddr *)&from,
170 	    fromlen);
171 #if 0
172 	if (l != -1) {
173 		/* Undo the connect binding again. */
174 		fromlen = sizeof(from);
175 		bzero(&from, fromlen);
176 		from.sin6_len = fromlen;
177 		from.sin6_family = AF_INET6;
178 		from.sin6_port = htons(port);	/* This only gives us a ::1:port ::1:port binding */
179 		rc = connect(s, (struct sockaddr *)&from, fromlen);
180 		if (rc == -1) {
181 			if (inet_ntop(PF_INET6, &from.sin6_addr, buf,
182 			    sizeof(buf)) == NULL)
183 				buf[0] = '\0';
184 			err(EX_OSERR, "un-connect(%d, %s, %u)", s, buf, fromlen);
185 		}
186 	}
187 #endif
188 
189 	return (error);
190 }
191 
192 static int
193 reflect_6(int domain, int type)
194 {
195 	struct sockaddr_in6 sin6;
196 	fd_set rset;
197 	int i, rc, s;
198 
199 	/* Get us a listen socket. */
200 	s = socket(domain, type, 0);
201 	if (s == -1)
202 		err(EX_OSERR, "socket()");
203 
204 	/*
205 	 * In case a FIB was given on cmd line, set it.  Let the kernel do the
206 	 * the bounds check.
207 	 */
208 	if (fib != (u_int)-1) {
209 		rc = setsockopt(s, SOL_SOCKET, SO_SETFIB, &fib, sizeof(fib));
210 		if (rc == -1)
211 			err(EX_OSERR, "setsockopt(SO_SETFIB)");
212 	}
213 
214 	/* Allow re-use. Otherwise restarting for the next test might error. */
215 	i = 1;
216 	rc = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
217 	if (rc == -1)
218 		err(EX_OSERR, "setsockopt(SO_REUSEADDR)");
219 	i = 1;
220 	rc = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &i, sizeof(i));
221 	if (rc == -1)
222 		err(EX_OSERR, "setsockopt(SO_REUSEPORT)");
223 
224 	/* Bind address and port or just port. */
225 	sin6.sin6_len = sizeof(sin6);
226 	sin6.sin6_family = AF_INET6;
227 	sin6.sin6_port = htons(port);
228 	sin6.sin6_flowinfo = 0;
229 	bzero(&sin6.sin6_addr, sizeof(sin6.sin6_addr));
230 	if (addr != NULL) {
231 		rc = inet_pton(PF_INET6, addr, &sin6.sin6_addr);
232 		if (rc == 0)
233 			errx(EX_USAGE, "inet_pton()");
234 		else if (rc == -1)
235 			err(EX_OSERR, "inet_pton()");
236 		else if (rc != 1)
237 			errx(EX_SOFTWARE, "inet_pton()");
238 	}
239 	sin6.sin6_scope_id = 0;
240 	rc = bind(s, (struct sockaddr *)&sin6, sizeof(sin6));
241 	if (rc == -1)
242 		err(EX_OSERR, "bind(%d)", s);
243 
244 	if (type == SOCK_STREAM) {
245 		rc = listen(s, port);
246 		if (rc == -1)
247 			err(EX_OSERR, "listen(%d, %u)", s, port);
248 	}
249 
250 	/*
251 	 * We shall never do more than one connection in parallel so can keep
252 	 * it simple.
253 	 */
254 	do {
255 		FD_ZERO(&rset);
256 		FD_SET(s, &rset);
257 		rc = select(s + 1, &rset, NULL, NULL, NULL);
258 		if (rc == -1 && errno != EINTR)
259 			err(EX_OSERR, "select()");
260 
261 		if (rc == 0 || errno == EINTR)
262 			continue;
263 
264 		if (rc != 1)
265 			errx(EX_OSERR, "select() miscounted 1 to %d", rc);
266 		if (!FD_ISSET(s, &rset))
267 			errx(EX_OSERR, "select() did not return our socket");
268 
269 		if (type == SOCK_STREAM)
270 			rc = reflect_tcp6_conn(s);
271 		else if (type == SOCK_DGRAM)
272 			rc = reflect_udp6_conn(s);
273 		else
274 			errx(EX_SOFTWARE, "Unsupported socket type %d", type);
275 	} while (rc == 0);
276 	/* Turn end flagging into no error. */
277 	if (rc == -2)
278 		rc = 0;
279 
280 	/* Close listen socket. */
281 	close(s);
282 
283 	return (rc);
284 }
285 
286 static int
287 reflect_tcp6(void)
288 {
289 
290 	return (reflect_6(PF_INET6, SOCK_STREAM));
291 }
292 
293 static int
294 reflect_udp6(void)
295 {
296 
297 	return (reflect_6(PF_INET6, SOCK_DGRAM));
298 }
299 
300 int
301 main(int argc, char *argv[])
302 {
303 	long long l;
304 	char *dummy, *afname;
305 	int ch, rc;
306 
307 	afname = NULL;
308 	while ((ch = getopt(argc, argv, "A:dF:f:Np:t:T:")) != -1) {
309 		switch (ch) {
310 		case 'A':
311 			addr = optarg;
312 			break;
313 		case 'd':
314 			debug++;
315 			break;
316 		case 'F':
317 			l = strtoll(optarg, &dummy, 10);
318 			if (*dummy != '\0' || l < 0)
319 				errx(EX_USAGE, "Invalid FIB number");
320 			fib = (u_int)l;
321 			break;
322 		case 'f':
323 			l = strtoll(optarg, &dummy, 10);
324 			if (*dummy != '\0' || l < 0)
325 				errx(EX_USAGE, "Invalid FIB number");
326 			reflectfib = (u_int)l;
327 			break;
328 		case 'N':
329 			nostart=1;
330 			break;
331 		case 'p':
332 			l = strtoll(optarg, &dummy, 10);
333 			if (*dummy != '\0' || l < 0)
334 				errx(EX_USAGE, "Invalid port number");
335 			port = (uint16_t)l;
336 			break;
337 		case 't':
338 			testcase = optarg;
339 			break;
340 		case 'T':
341 			afname = optarg;
342 			break;
343 		case '?':
344 		default:
345 			errx(EX_USAGE, "Unknown command line option at '%c'",
346 			    optopt);
347 			/* NOTREACHED */
348 		}
349 	}
350 
351 	if (testcase == NULL)
352 		errx(EX_USAGE, "Mandatory option -t <testcase> not given");
353 	if (afname == NULL)
354 		errx(EX_USAGE, "Mandatory option -T <afname> not given");
355 
356 	if (strcmp(afname, "TCP6") == 0)
357 		rc = reflect_tcp6();
358 	else if (strcmp(afname, "UDP6") == 0)
359 		rc = reflect_udp6();
360 	else
361 		errx(EX_USAGE, "Mandatory option -T %s not a valid option",
362 		    afname);
363 
364 	return (rc);
365 }
366