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d3138208ac
We need this in order to help debug cases where minitcpsrvr seem to have force-terminated before it was finished (on slow machines).
132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
/* a very simplistic tcp receiver for the rsyslog testbench.
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*
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* Copyright 2016 Rainer Gerhards and Adiscon GmbH.
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*
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* This file is part of the rsyslog project.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* -or-
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* see COPYING.ASL20 in the source distribution
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#if defined(__FreeBSD__)
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#include <netinet/in.h>
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#endif
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static void
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errout(char *reason)
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{
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perror(reason);
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exit(1);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: minitcpsrvr -t ip-addr -p port -f outfile\n");
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exit (1);
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}
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int
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main(int argc, char *argv[])
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{
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int fds;
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int fdc;
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int fdf = -1;
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struct sockaddr_in srvAddr;
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struct sockaddr_in cliAddr;
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unsigned int srvAddrLen;
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unsigned int cliAddrLen;
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char wrkBuf[4096];
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ssize_t nRead;
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int opt;
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int sleeptime = 0;
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char *targetIP = NULL;
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int targetPort = -1;
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while((opt = getopt(argc, argv, "t:p:f:s:")) != -1) {
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switch (opt) {
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case 's':
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sleeptime = atoi(optarg);
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break;
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case 't':
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targetIP = optarg;
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break;
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case 'p':
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targetPort = atoi(optarg);
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break;
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case 'f':
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if(!strcmp(optarg, "-")) {
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fdf = 1;
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} else {
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fdf = open(optarg, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR|S_IWUSR);
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if(fdf == -1) errout(argv[3]);
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}
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break;
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default:
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fprintf(stderr, "invalid option '%c' or value missing - terminating...\n", opt);
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usage();
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break;
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}
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}
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if(targetIP == NULL) {
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fprintf(stderr, "-t parameter missing -- terminating\n");
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usage();
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}
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if(targetPort == -1) {
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fprintf(stderr, "-p parameter missing -- terminating\n");
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usage();
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}
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if(fdf == -1) {
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fprintf(stderr, "-f parameter missing -- terminating\n");
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usage();
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}
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if(sleeptime) {
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printf("minitcpsrv: deliberate sleep of %d seconds\n", sleeptime);
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sleep(sleeptime);
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printf("minitcpsrv: end sleep\n");
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}
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fds = socket(AF_INET, SOCK_STREAM, 0);
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srvAddr.sin_family = AF_INET;
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srvAddr.sin_addr.s_addr = inet_addr(targetIP);
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srvAddr.sin_port = htons(targetPort);
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srvAddrLen = sizeof(srvAddr);
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if(bind(fds, (struct sockaddr *)&srvAddr, srvAddrLen) != 0)
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errout("bind");
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if(listen(fds, 20) != 0) errout("listen");
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cliAddrLen = sizeof(cliAddr);
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fdc = accept(fds, (struct sockaddr *)&cliAddr, &cliAddrLen);
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while(1) {
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nRead = read(fdc, wrkBuf, sizeof(wrkBuf));
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if(nRead == 0) break;
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if(write(fdf, wrkBuf, nRead) != nRead)
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errout("write");
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}
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/* let the OS do the cleanup */
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fprintf(stderr, "minitcpsrv terminates itself\n");
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return 0;
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}
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