tcpstream.c revision 135132 
1/*-
2 * Copyright (c) 2004 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/tools/regression/netinet/tcpstream/tcpstream.c 135132 2004-09-13 03:17:22Z rwatson $
27 */
28
29/*
30 * tcpstream sets up a simple TCP client and server, and then streams a
31 * predictable pseudo-random byte sequence through it using variable block
32 * sizes.  The intent is to to detect corruption of data in the TCP stream.
33 */
34
35#include <sys/types.h>
36#include <sys/errno.h>
37#include <sys/socket.h>
38
39#include <netinet/in.h>
40
41#include <arpa/inet.h>
42
43#include <stdio.h>
44#include <stdlib.h>
45#include <string.h>
46#include <unistd.h>
47
48#define	MAX_LOOPS	10240
49#define	MAX_LONGS	1024
50
51static void
52usage(void)
53{
54
55	fprintf(stderr, "tcpstream client [ip] [port] [seed]\n");
56	fprintf(stderr, "tcpstream server [port] [seed]\n");
57	exit(-1);
58}
59
60static void
61fill_buffer(long *buffer, int len)
62{
63	int i;
64
65	for (i = 0; i < len; i++)
66		buffer[i] = htonl(random());
67}
68
69static int
70check_buffer(long *buffer, int len)
71{
72	int i;
73
74	for (i = 0; i < len; i++) {
75		if (buffer[i] != htonl(random()))
76			return (0);
77	}
78	return (1);
79}
80
81static void
82tcpstream_client(struct sockaddr_in sin, long seed)
83{
84	long buffer[MAX_LONGS];
85	ssize_t len;
86	int i, j, sock;
87
88	srandom(seed);
89
90	sock = socket(PF_INET, SOCK_STREAM, 0);
91	if (sock == -1) {
92		perror("socket");
93		exit(-1);
94	}
95
96	if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) == -1) {
97		perror("connect");
98		exit(-1);
99	}
100
101	for (j = 0; j < MAX_LOOPS; j++) {
102		for (i = 0; i < MAX_LONGS; i++) {
103			fill_buffer(buffer, i);
104			len = send(sock, buffer, i * sizeof(long), 0);
105			if (len == -1) {
106				printf("%d bytes written of %d expected\n",
107				    len, i * sizeof(long));
108				fflush(stdout);
109				perror("send");
110				goto done;
111			}
112		}
113	}
114
115done:
116	close(sock);
117}
118
119static void
120tcpstream_server(struct sockaddr_in sin, long seed)
121{
122	int i, j, listen_sock, accept_sock;
123	struct sockaddr_in other_sin;
124	long buffer[MAX_LONGS];
125	socklen_t addrlen;
126	ssize_t len;
127
128	int input_byte_counter;
129
130	listen_sock = socket(PF_INET, SOCK_STREAM, 0);
131	if (listen_sock == -1) {
132		perror("socket");
133		exit(-1);
134	}
135
136	if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
137		perror("bind");
138		exit(-1);
139	}
140
141	if (listen(listen_sock, -1) == -1) {
142		perror("listen");
143		exit(-1);
144	}
145
146	while (1) {
147		bzero(&other_sin, sizeof(other_sin));
148		addrlen = sizeof(other_sin);
149
150		accept_sock = accept(listen_sock, (struct sockaddr *)
151		    &other_sin, &addrlen);
152		if (accept_sock == -1) {
153			perror("accept");
154			continue;
155		}
156		printf("connection opened from %s:%d\n",
157		    inet_ntoa(other_sin.sin_addr), ntohs(other_sin.sin_port));
158		input_byte_counter = 0;
159
160		srandom(seed);
161
162		for (j = 0; j < MAX_LOOPS; j++) {
163			for (i = 0; i < MAX_LONGS; i++) {
164				len = recv(accept_sock, buffer,
165				    i * sizeof(long), MSG_WAITALL);
166				if (len != i * sizeof(long)) {
167					perror("recv");
168					goto done;
169				}
170				if (check_buffer(buffer, i) == 0) {
171					fprintf(stderr,
172    "Corruption in block beginning %d and ending %d\n", input_byte_counter,
173    input_byte_counter + len);
174					fprintf(stderr,
175    "Block size %d\n", i * sizeof(long));
176					goto done;
177				}
178				input_byte_counter += len;
179			}
180		}
181done:
182		printf("connection closed\n");
183		close(accept_sock);
184	}
185}
186
187int
188main(int argc, char *argv[])
189{
190	struct sockaddr_in sin;
191	long port, seed;
192	char *dummy;
193
194	if (argc < 2)
195		usage();
196	if (strcmp(argv[1], "client") == 0) {
197		if (argc != 5)
198			usage();
199
200		bzero(&sin, sizeof(sin));
201		sin.sin_len = sizeof(sin);
202		sin.sin_family = AF_INET;
203
204		if (inet_aton(argv[2], &sin.sin_addr) != 1) {
205			errno = EINVAL;
206			perror(argv[2]);
207			exit(-1);
208		}
209
210		port = strtoul(argv[3], &dummy, 10);
211		if (port < 1 || port > 65535 || *dummy != '\0')
212			usage();
213		sin.sin_port = htons(port);
214
215		seed = strtoul(argv[4], &dummy, 10);
216		if (*dummy != '\0')
217			usage();
218
219		tcpstream_client(sin, seed);
220
221	} else if (strcmp(argv[1], "server") == 0) {
222		if (argc != 4)
223			usage();
224
225		bzero(&sin, sizeof(sin));
226		sin.sin_len = sizeof(sin);
227		sin.sin_family = AF_INET;
228		sin.sin_addr.s_addr = INADDR_ANY;
229
230		port = strtoul(argv[2], &dummy, 10);
231		if (port < 1 || port > 65535 || *dummy != '\0')
232			usage();
233		sin.sin_port = htons(port);
234
235		seed = strtoul(argv[3], &dummy, 10);
236		if (*dummy != '\0')
237			usage();
238
239		tcpstream_server(sin, seed);
240	} else
241		usage();
242
243	return (0);
244}
245