From bae28eaa8d26ddd67e9af51979f1a54599e9b3a8 Mon Sep 17 00:00:00 2001 From: "George V. Neville-Neil" Date: Wed, 28 Oct 2015 03:43:24 +0000 Subject: [PATCH] Add a test for the listen queue using two test programs, listen, and connect. The listen program is a simple server that accepts and closes sockets, until a fixed limit, then sets the listen queue to 0 and counts how many remaining connections it processes. The connect program repeatedly opens connections and closes them serving as the driver for the listen program. Sponsored by: Limelight Networks --- tools/test/net/Makefile | 9 ++++ tools/test/net/connect.c | 86 +++++++++++++++++++++++++++++++ tools/test/net/listen.c | 106 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 201 insertions(+) create mode 100644 tools/test/net/Makefile create mode 100644 tools/test/net/connect.c create mode 100644 tools/test/net/listen.c diff --git a/tools/test/net/Makefile b/tools/test/net/Makefile new file mode 100644 index 000000000000..e4c525920d8c --- /dev/null +++ b/tools/test/net/Makefile @@ -0,0 +1,9 @@ +# $FreeBSD$ + +PROGS= listen connect +MAN= +WARNS?= 6 + +test: ${PROGS} + +.include diff --git a/tools/test/net/connect.c b/tools/test/net/connect.c new file mode 100644 index 000000000000..a1245f1e8b3a --- /dev/null +++ b/tools/test/net/connect.c @@ -0,0 +1,86 @@ +/*- + * Copyright (c) 2015 George V. Neville-Neil + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define PORT 6969 /* Default port */ +#define RECV_LIMIT 64 /* When do we move listen to 0? */ + +void usage(void); + +void usage() +{ + err(EX_USAGE, "connect [-p port]\n"); +} + +int main(int argc, char **argv) +{ + + int ch, cli_sock, count = 0; + int port = PORT; + struct sockaddr_in remoteaddr; + + while ((ch = getopt(argc, argv, "p:")) != -1) { + switch (ch) { + case 'p': + port = atoi(optarg); + break; + case 'h': + default: + usage(); + } + } + + bzero(&remoteaddr, sizeof(remoteaddr)); + remoteaddr.sin_len = sizeof(remoteaddr); + remoteaddr.sin_family = AF_INET; + remoteaddr.sin_port = htons(port); + remoteaddr.sin_addr.s_addr = INADDR_ANY; + + cli_sock = socket(AF_INET, SOCK_STREAM, 0); + + while ((cli_sock = connect(cli_sock, (struct sockaddr *)&remoteaddr, + sizeof(remoteaddr))) >= 0) { + count++; + close(cli_sock); + cli_sock = socket(AF_INET, SOCK_STREAM, 0); + } + + printf("Exiting at %d with errno %d\n", count, errno); + +} diff --git a/tools/test/net/listen.c b/tools/test/net/listen.c new file mode 100644 index 000000000000..2c09bb699b76 --- /dev/null +++ b/tools/test/net/listen.c @@ -0,0 +1,106 @@ +/*- + * Copyright (c) 2015 George V. Neville-Neil + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define PORT 6969 /* Default port */ +#define LISTEN 5 /* Default backlog */ +#define RECV_LIMIT 64 /* When do we move listen to 0? */ + +void usage(void); + +void usage() +{ + err(EX_USAGE, "listen [-p port] [-l limit]\n"); +} + +int main(int argc, char **argv) +{ + + int ch, srv_sock, cli_sock, recvd = 0; + int port = PORT; + int limit = LISTEN; + struct sockaddr_in localaddr; + + while ((ch = getopt(argc, argv, "p:l:")) != -1) { + switch (ch) { + case 'p': + port = atoi(optarg); + break; + case 'l': + limit = atoi(optarg); + break; + case 'h': + default: + usage(); + } + } + + bzero(&localaddr, sizeof(localaddr)); + localaddr.sin_len = sizeof(localaddr); + localaddr.sin_family = AF_INET; + localaddr.sin_port = htons(port); + localaddr.sin_addr.s_addr = INADDR_ANY; + + srv_sock = socket(AF_INET, SOCK_STREAM, 0); + + if (bind(srv_sock, (struct sockaddr *)&localaddr, + sizeof(struct sockaddr_in)) < 0) + err(EX_OSERR, "Could not bind to INADDR_ANY:%d", port); + + if (listen(srv_sock, limit) < 0) + err(EX_OSERR, "Failed to listen with depth of %d\n", limit); + + while (((cli_sock = accept(srv_sock, NULL, NULL)) >= 0) + && (recvd < RECV_LIMIT)) { + close(cli_sock); + recvd++; + } + + listen(srv_sock, 0); + + while (((cli_sock = accept(srv_sock, NULL, NULL)) >= 0) + && (recvd <= (RECV_LIMIT + limit + 1))) { + close(cli_sock); + recvd++; + } + + if (accept(srv_sock, NULL, NULL) >= 0) + printf ("Late connection at %d\n", recvd); + else + printf("recvd %d\n", recvd); +}