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Diffstat (limited to 'tests/tcpflood.c')
-rw-r--r-- | tests/tcpflood.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/tests/tcpflood.c b/tests/tcpflood.c new file mode 100644 index 00000000..2ca796ca --- /dev/null +++ b/tests/tcpflood.c @@ -0,0 +1,293 @@ +/* Opens a large number of tcp connections and sends + * messages over them. This is used for stress-testing. + * + * Params + * argv[1] target address + * argv[2] target port + * argv[3] number of connections + * argv[4] number of messages to send (connection is random) + * argv[5] initial message number (optional) + * + * 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 <time.h> +#include <signal.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <arpa/inet.h> +#include <assert.h> +#include <unistd.h> +#include <string.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 char *targetIP; +static int targetPort; +static int numMsgsToSend; /* number of messages to send */ +static int numConnections; /* number of connections to create */ +static int *sockArray; /* array of sockets to use */ +static int msgNum = 0; /* initial message number to start with */ + + +/* open a single tcp connection + */ +int openConn(int *fd) +{ + int sock; + struct sockaddr_in addr; + + 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(targetPort); + if(inet_aton(targetIP, &addr.sin_addr)==0) { + fprintf(stderr, "inet_aton() failed\n"); + return(1); + } + if(connect(sock, (struct sockaddr*)&addr, sizeof(addr)) != 0) { + perror("connect()"); + fprintf(stderr, "connect() failed\n"); + return(1); + } + + *fd = sock; + return 0; +} + + +/* open all requested tcp connections + * this includes allocating the connection array + */ +int openConnections(void) +{ + int i; + char msgBuf[128]; + size_t lenMsg; + + write(1, " open connections", sizeof(" open connections")-1); + sockArray = calloc(numConnections, sizeof(int)); + for(i = 0 ; i < numConnections ; ++i) { + if(i % 10 == 0) { + printf("\r%5.5d", i); + //lenMsg = sprintf(msgBuf, "\r%5.5d", i); + //write(1, msgBuf, lenMsg); + } + if(openConn(&(sockArray[i])) != 0) { + printf("error in trying to open connection i=%d\n", i); + return 1; + } + } + lenMsg = sprintf(msgBuf, "\r%5.5d open connections\n", i); + write(1, msgBuf, lenMsg); + + return 0; +} + + +/* we also close all connections because otherwise we may get very bad + * timing for the syslogd - it may not be able to process all incoming + * messages fast enough if we immediately shut down. + * TODO: it may be an interesting excercise to handle that situation + * at the syslogd level, too + * rgerhards, 2009-04-14 + */ +void closeConnections(void) +{ + int i; + char msgBuf[128]; + size_t lenMsg; + + write(1, " close connections", sizeof(" close connections")-1); + for(i = 0 ; i < numConnections ; ++i) { + if(i % 10 == 0) { + lenMsg = sprintf(msgBuf, "\r%5.5d", i); + write(1, msgBuf, lenMsg); + } + close(sockArray[i]); + } + lenMsg = sprintf(msgBuf, "\r%5.5d close connections\n", i); + write(1, msgBuf, lenMsg); + +} + + +/* send messages to the tcp connections we keep open. We use + * a very basic format that helps identify the message + * (via msgnum:<number>: e.g. msgnum:00000001:). This format is suitable + * for extracton to field-based properties. + * The first numConnection messages are sent sequentially, as are the + * last. All messages in between are sent over random connections. + * Note that message numbers start at 0. + */ +int sendMessages(void) +{ + int i; + int socknum; + int lenBuf; + int lenSend; + char buf[2048]; + + srand(time(NULL)); /* seed is good enough for our needs */ + + printf("Sending %d messages.\n", numMsgsToSend); + printf("\r%5.5d messages sent", 0); + for(i = 0 ; i < numMsgsToSend ; ++i) { + if(i < numConnections) + socknum = i; + else if(i >= numMsgsToSend - numConnections) + socknum = i - (numMsgsToSend - numConnections); + else + socknum = rand() % numConnections; + lenBuf = sprintf(buf, "<167>Mar 1 01:00:00 172.20.245.8 tag msgnum:%8.8d:\n", msgNum); + lenSend = send(sockArray[socknum], buf, lenBuf, 0); + if(lenSend != lenBuf) { + printf("\r%5.5d\n", i); + fflush(stdout); + perror("send test data"); + printf("send() failed at socket %d, index %d, msgNum %d\n", socknum, i, msgNum); + fflush(stderr); + return(1); + } + if(i % 100 == 0) { + printf("\r%5.5d", i); + } + ++msgNum; + } + printf("\r%5.5d messages sent\n", i); + + return 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; +} + + +/* 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 ret = 0; + struct sigaction sigAct; + static char buf[1024]; + + /* on Solaris, we do not HAVE MSG_NOSIGNAL, so for this reason + * we block SIGPIPE (not an issue for this program) + */ + memset(&sigAct, 0, sizeof(sigAct)); + sigemptyset(&sigAct.sa_mask); + sigAct.sa_handler = SIG_IGN; + sigaction(SIGPIPE, &sigAct, NULL); + + setvbuf(stdout, buf, _IONBF, 48); + + if(argc != 5 && argc != 6) { + printf("Invalid call of tcpflood\n"); + printf("Usage: tcpflood target-host target-port num-connections num-messages [initial msgnum]\n"); + exit(1); + } + + targetIP = argv[1]; + targetPort = atoi(argv[2]); + numConnections = atoi(argv[3]); + numMsgsToSend = atoi(argv[4]); + if(argc == 6) + msgNum = atoi(argv[5]); + + if(openConnections() != 0) { + printf("error opening connections\n"); + exit(1); + } + + if(sendMessages() != 0) { + printf("error sending messages\n"); + exit(1); + } + + //closeConnections(); + printf("End of tcpflood Run\n"); + + exit(ret); +} |