1/*-
2 * Copyright (c) 2004-2005 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 * $FreeBSD$
27 */
28
29#include <sys/types.h>
30#include <sys/socket.h>
31
32#include <netinet/in.h>
33#include <netinet/tcp.h>
34
35#include <arpa/inet.h>
36
37#include <err.h>
38#include <errno.h>
39#include <fcntl.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45
46static void
47usage(void)
48{
49
50	fprintf(stderr, "tcpconnect server port\n");
51	fprintf(stderr, "tcpconnect client ip port count [nonblock] [tcpmd5]\n");
52	exit(-1);
53}
54
55static void
56tcpconnect_server(int argc, char *argv[])
57{
58	int listen_sock, accept_sock;
59	struct sockaddr_in sin;
60	char *dummy;
61	long port;
62
63	if (argc != 1)
64		usage();
65
66	bzero(&sin, sizeof(sin));
67	sin.sin_len = sizeof(sin);
68	sin.sin_family = AF_INET;
69	sin.sin_addr.s_addr = htonl(INADDR_ANY);
70
71	port = strtoul(argv[0], &dummy, 10);
72	if (port < 1 || port > 65535 || *dummy != '\0')
73		usage();
74	sin.sin_port = htons(port);
75
76	listen_sock = socket(PF_INET, SOCK_STREAM, 0);
77	if (listen_sock == -1)
78		err(-1, "socket");
79
80	if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) == -1)
81		err(-1, "bind");
82
83	if (listen(listen_sock, -1) == -1)
84		err(-1, "listen");
85
86	while (1) {
87		accept_sock = accept(listen_sock, NULL, NULL);
88		close(accept_sock);
89	}
90}
91
92static void
93tcpconnect_client(int argc, char *argv[])
94{
95	struct sockaddr_in sin;
96	long count, i, port;
97	char *dummy;
98	int sock;
99	int nonblock = 0, md5enable = 0;
100
101	if (argc < 3 || argc > 5)
102		usage();
103	for (i=3; i < argc; i++) {
104		if (strcmp(argv[i], "nonblock") == 0)
105			nonblock = 1;
106		if (strcmp(argv[i], "tcpmd5") == 0)
107			md5enable = 1;
108	}
109
110	bzero(&sin, sizeof(sin));
111	sin.sin_len = sizeof(sin);
112	sin.sin_family = AF_INET;
113	if (inet_aton(argv[0], &sin.sin_addr) == 0)
114		err(-1, "listen");
115
116	port = strtoul(argv[1], &dummy, 10);
117	if (port < 1 || port > 65535 || *dummy != '\0')
118		usage();
119	sin.sin_port = htons(port);
120
121	count = strtoul(argv[2], &dummy, 10);
122	if (count < 1 || count > 100000 || *dummy != '\0')
123		usage();
124
125	for (i = 0; i < count; i++) {
126		sock = socket(PF_INET, SOCK_STREAM, 0);
127		if (sock == -1)
128			err(-1, "socket");
129
130		/* No warning in default case on ENOPROTOOPT. */
131		if (setsockopt(sock, IPPROTO_TCP, TCP_MD5SIG,
132		    &md5enable, sizeof(md5enable)) != 0) {
133			if (errno == ENOPROTOOPT && md5enable > 0)
134				err(-1, "setsockopt(TCP_MD5SIG)");
135			else if (errno != ENOPROTOOPT)
136				warn("setsockopt(TCP_MD5SIG)");
137		}
138
139		if (nonblock) {
140			if (fcntl(sock, F_SETFL, O_NONBLOCK) != 0)
141				err(-1, "fcntl(F_SETFL)");
142
143			if (connect(sock, (struct sockaddr *)&sin,
144			    sizeof(sin)) == -1 && errno != EINPROGRESS)
145				err(-1, "connect");
146		} else {
147			if (connect(sock, (struct sockaddr *)&sin,
148			    sizeof(sin)) == -1)
149				err(-1, "connect");
150		}
151
152		close(sock);
153	}
154}
155
156int
157main(int argc, char *argv[])
158{
159
160	if (argc < 2)
161		usage();
162
163	if (strcmp(argv[1], "server") == 0)
164		tcpconnect_server(argc - 2, argv + 2);
165	else if (strcmp(argv[1], "client") == 0)
166		tcpconnect_client(argc - 2, argv + 2);
167	else
168		usage();
169
170	exit(0);
171}
172