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