summaryrefslogtreecommitdiffstats
path: root/tests/nettester.c
blob: 37183ac9dd216357862e80cbd55b555449b5e7ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
/* Runs a test suite on the rsyslog (and later potentially
 * other things).
 *
 * The name of the test suite must be given as argv[1]. In this config,
 * rsyslogd is loaded with config ./testsuites/<name>.conf and then
 * test cases ./testsuites/ *.<name> are executed on it. This test driver is
 * suitable for testing cases where a message sent (via UDP) results in
 * exactly one response. It can not be used in cases where no response
 * is expected (that would result in a hang of the test driver).
 * Note: each test suite can contain many tests, but they all need to work
 * with the same rsyslog configuration.
 *
 * Part of the testbench for rsyslog.
 *
 * Copyright 2009 Rainer Gerhards and Adiscon GmbH.
 *
 * This file is part of rsyslog.
 *
 * Rsyslog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Rsyslog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Rsyslog.  If not, see <http://www.gnu.org/licenses/>.
 *
 * A copy of the GPL can be found in the file "COPYING" in this distribution.
 */
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <arpa/inet.h>
#include <assert.h>
#include <unistd.h>
#include <string.h>
#include <glob.h>
#include <signal.h>
#include <netinet/in.h>

#define EXIT_FAILURE 1
#define INVALID_SOCKET -1
/* Name of input file, must match $IncludeConfig in test suite .conf files */
#define NETTEST_INPUT_CONF_FILE "nettest.input.conf" /* name of input file, must match $IncludeConfig in .conf files */

static enum { inputUDP, inputTCP } inputMode;	/* input for which tests are to be run */
static pid_t rsyslogdPid = 0;	/* pid of rsyslog instance being tested */
static char *srcdir;	/* global $srcdir, set so that we can run outside of "make check" */
static char *testSuite; /* name of current test suite */


void readLine(int fd, char *ln)
{
	char c;
	int lenRead;
	lenRead = read(fd, &c, 1);
	while(lenRead == 1 && c != '\n') {
		*ln++ = c;
		 lenRead = read(fd, &c, 1);
	}
	*ln = '\0';
}


/* send a message via TCP
 * We open the connection on the initial send, and never close it
 * (let the OS do that). If a conneciton breaks, we do NOT try to
 * recover, so all test after that one will fail (and the test
 * driver probably hang. returns 0 if ok, something else otherwise.
 * We use traditional framing '\n' at EOR for this tester. It may be
 * worth considering additional framing modes.
 * rgerhards, 2009-04-08
 */
int
tcpSend(char *buf, int lenBuf)
{
	static int sock = INVALID_SOCKET;
	struct sockaddr_in addr;

	if(sock == INVALID_SOCKET) {
		/* first time, need to connect to target */
		if((sock=socket(AF_INET, SOCK_STREAM, 0))==-1) {
			perror("socket()");
			return(1);
		}

		memset((char *) &addr, 0, sizeof(addr));
		addr.sin_family = AF_INET;
		addr.sin_port = htons(13514);
		if(inet_aton("127.0.0.1", &addr.sin_addr)==0) {
			fprintf(stderr, "inet_aton() failed\n");
			return(1);
		}
		if(connect(sock, (struct sockaddr*)&addr, sizeof(addr)) != 0) {
			fprintf(stderr, "connect() failed\n");
			return(1);
		}
	}

	/* send test data */
	if(send(sock, buf, lenBuf, 0) != lenBuf) {
		perror("send test data");
		fprintf(stderr, "send() failed\n");
		return(1);
	}

	/* send record terminator */
	if(send(sock, "\n", 1, 0) != 1) {
		perror("send record terminator");
		fprintf(stderr, "send() failed\n");
		return(1);
	}

	return 0;
}


/* send a message via UDP
 * returns 0 if ok, something else otherwise.
 */
int
udpSend(char *buf, int lenBuf)
{
	struct sockaddr_in si_other;
	int s, slen=sizeof(si_other);

	if((s=socket(AF_INET, SOCK_DGRAM, 0))==-1) {
		perror("socket()");
		return(1);
	}

	memset((char *) &si_other, 0, sizeof(si_other));
	si_other.sin_family = AF_INET;
	si_other.sin_port = htons(12514);
	if(inet_aton("127.0.0.1", &si_other.sin_addr)==0) {
		fprintf(stderr, "inet_aton() failed\n");
		return(1);
	}

	if(sendto(s, buf, lenBuf, 0, (struct sockaddr*) &si_other, slen)==-1) {
		perror("sendto");
		fprintf(stderr, "sendto() failed\n");
		return(1);
	}

	close(s);
	return 0;
}


/* open pipe to test candidate - so far, this is
 * always rsyslogd and with a fixed config. Later, we may
 * change this. Returns 0 if ok, something else otherwise.
 * rgerhards, 2009-03-31
 */
int openPipe(char *configFile, pid_t *pid, int *pfd)
{
	int pipefd[2];
	pid_t cpid;
	char *newargv[] = {"../tools/rsyslogd", "dummy", "-c4", "-u2", "-n", "-irsyslog.pid",
			   "-M../runtime/.libs:../.libs", NULL };
	char confFile[1024];
	char *newenviron[] = { NULL };


	sprintf(confFile, "-f%s/testsuites/%s.conf", srcdir, configFile);
	newargv[1] = confFile;

	if (pipe(pipefd) == -1) {
		perror("pipe");
		exit(EXIT_FAILURE);
	}

	cpid = fork();
	if (cpid == -1) {
		perror("fork");
		exit(EXIT_FAILURE);
	}

	if(cpid == 0) {    /* Child reads from pipe */
		fclose(stdout);
		dup(pipefd[1]);
		close(pipefd[1]);
		close(pipefd[0]);
		fclose(stdin);
		execve("../tools/rsyslogd", newargv, newenviron);
	} else {            
		close(pipefd[1]);
		*pid = cpid;
		*pfd = pipefd[0];
	}

	return(0);
}


/* Process a specific test case. File name is provided.
 * Needs to return 0 if all is OK, something else otherwise.
 */
int
processTestFile(int fd, char *pszFileName)
{
	FILE *fp;
	char *testdata = NULL;
	char *expected = NULL;
	int ret = 0;
	size_t lenLn;
	char buf[4096];

	if((fp = fopen((char*)pszFileName, "r")) == NULL) {
		perror((char*)pszFileName);
		return(2);
	}

	/* skip comments at start of file */

	getline(&testdata, &lenLn, fp);
	while(!feof(fp)) {
		if(*testdata == '#')
			getline(&testdata, &lenLn, fp);
		else
			break; /* first non-comment */
	}


	testdata[strlen(testdata)-1] = '\0'; /* remove \n */
	/* now we have the test data to send (we could use function pointers here...) */
	if(inputMode == inputUDP) {
		if(udpSend(testdata, strlen(testdata)) != 0)
			return(2);
	} else {
		if(tcpSend(testdata, strlen(testdata)) != 0)
			return(2);
	}

	/* next line is expected output 
	 * we do not care about EOF here, this will lead to a failure and thus
	 * draw enough attention. -- rgerhards, 2009-03-31
	 */
	getline(&expected, &lenLn, fp);
	expected[strlen(expected)-1] = '\0'; /* remove \n */

	/* pull response from server and then check if it meets our expectation */
	readLine(fd, buf);
	if(strcmp(expected, buf)) {
		printf("\nExpected Response:\n'%s'\nActual Response:\n'%s'\n",
			expected, buf);
			ret = 1;
	}

	free(testdata);
	free(expected);
	fclose(fp);
	return(ret);
}


/* carry out all tests. Tests are specified via a file name
 * wildcard. Each of the files is read and the test carried
 * out.
 * Returns the number of tests that failed. Zero means all
 * success.
 */
int
doTests(int fd, char *files)
{
	int iFailed = 0;
	int iTests = 0;
	int ret;
	char *testFile;
	glob_t testFiles;
	size_t i = 0;
	struct stat fileInfo;

	glob(files, GLOB_MARK, NULL, &testFiles);

	for(i = 0; i < testFiles.gl_pathc; i++) {
		testFile = testFiles.gl_pathv[i];

		if(stat((char*) testFile, &fileInfo) != 0) 
			continue; /* continue with the next file if we can't stat() the file */

		++iTests;
		/* all regular files are run through the test logic. Symlinks don't work. */
		if(S_ISREG(fileInfo.st_mode)) { /* config file */
			printf("processing test case '%s' ... ", testFile);
			ret = processTestFile(fd, testFile);
			if(ret == 0) {
				printf("successfully completed\n");
			} else {
				printf("failed!\n");
				++iFailed;
			}
		}
	}
	globfree(&testFiles);

	if(iTests == 0) {
		printf("Error: no test cases found, no tests executed.\n");
		iFailed = 1;
	} else {
		printf("Number of tests run: %d, number of failures: %d\n", iTests, iFailed);
	}

	return(iFailed);
}

/* cleanup */
void doAtExit(void)
{
	int status;

	if(rsyslogdPid != 0) {
		kill(rsyslogdPid, SIGTERM);
		waitpid(rsyslogdPid, &status, 0);	/* wait until instance terminates */
	}

	unlink(NETTEST_INPUT_CONF_FILE);
}

/* Run the test suite. This must be called with exactly one parameter, the
 * name of the test suite. For details, see file header comment at the top
 * of this file.
 * rgerhards, 2009-04-03
 */
int main(int argc, char *argv[])
{
	int fd;
	int ret = 0;
	FILE *fp;
	char buf[4096];
	char testcases[4096];

	if(argc != 3) {
		printf("Invalid call of nettester\n");
		printf("Usage: nettester testsuite-name input\n");
		printf("       input = udp|tcp\n");
		exit(1);
	}
	
	atexit(doAtExit);

	testSuite = argv[1];

	if(!strcmp(argv[2], "udp"))
		inputMode = inputUDP;
	else if(!strcmp(argv[2], "tcp"))
		inputMode = inputTCP;
	else {
		printf("error: unsupported input mode '%s'\n", argv[2]);
		exit(1);
	}

	if((srcdir = getenv("srcdir")) == NULL)
		srcdir = ".";

	printf("Start of nettester run ($srcdir=%s, testsuite=%s, input=%s)\n",
		srcdir, testSuite, argv[2]);

	/* create input config file */
	if((fp = fopen(NETTEST_INPUT_CONF_FILE, "w")) == NULL) {
		perror(NETTEST_INPUT_CONF_FILE);
		printf("error opening input configuration file\n");
		exit(1);
	}
	if(inputMode == inputUDP) {
		fputs("$ModLoad ../plugins/imudp/.libs/imudp\n", fp);
		fputs("$UDPServerRun 12514\n", fp);
	} else {
		fputs("$ModLoad ../plugins/imtcp/.libs/imtcp\n", fp);
		fputs("$InputTCPServerRun 13514\n", fp);
	}
	fclose(fp);

	/* start to be tested rsyslogd */
	openPipe(argv[1], &rsyslogdPid, &fd);
	readLine(fd, buf);

	/* generate filename */
	sprintf(testcases, "%s/testsuites/*.%s", srcdir, testSuite);
	if(doTests(fd, testcases) != 0)
		ret = 1;

	printf("End of nettester run (%d).\n", ret);
	exit(ret);
}