Commit | Line | Data |
---|---|---|
3edcb7c8 KB |
1 | .\" Copyright (c) 1986 The Regents of the University of California. |
2 | .\" All rights reserved. | |
3 | .\" | |
af359dea C |
4 | .\" Redistribution and use in source and binary forms, with or without |
5 | .\" modification, are permitted provided that the following conditions | |
6 | .\" are met: | |
7 | .\" 1. Redistributions of source code must retain the above copyright | |
8 | .\" notice, this list of conditions and the following disclaimer. | |
9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer in the | |
11 | .\" documentation and/or other materials provided with the distribution. | |
12 | .\" 3. All advertising materials mentioning features or use of this software | |
13 | .\" must display the following acknowledgement: | |
14 | .\" This product includes software developed by the University of | |
15 | .\" California, Berkeley and its contributors. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
17 | .\" may be used to endorse or promote products derived from this software | |
18 | .\" without specific prior written permission. | |
3edcb7c8 | 19 | .\" |
af359dea C |
20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | .\" SUCH DAMAGE. | |
31 | .\" | |
32 | .\" @(#)streamread.c 6.4 (Berkeley) 4/17/91 | |
3edcb7c8 | 33 | .\" |
23237d2e KM |
34 | #include <sys/types.h> |
35 | #include <sys/socket.h> | |
36 | #include <netinet/in.h> | |
37 | #include <netdb.h> | |
38 | #include <stdio.h> | |
39 | #define TRUE 1 | |
40 | ||
41 | /* | |
42 | * This program creates a socket and then begins an infinite loop. Each time | |
43 | * through the loop it accepts a connection and prints out messages from it. | |
44 | * When the connection breaks, or a termination message comes through, the | |
45 | * program accepts a new connection. | |
46 | */ | |
47 | ||
48 | main() | |
49 | { | |
a43acb6b | 50 | int sock, length; |
23237d2e | 51 | struct sockaddr_in server; |
a43acb6b MK |
52 | int msgsock; |
53 | char buf[1024]; | |
54 | int rval; | |
55 | int i; | |
23237d2e KM |
56 | |
57 | /* Create socket */ | |
58 | sock = socket(AF_INET, SOCK_STREAM, 0); | |
59 | if (sock < 0) { | |
60 | perror("opening stream socket"); | |
a43acb6b | 61 | exit(1); |
23237d2e KM |
62 | } |
63 | /* Name socket using wildcards */ | |
64 | server.sin_family = AF_INET; | |
65 | server.sin_addr.s_addr = INADDR_ANY; | |
66 | server.sin_port = 0; | |
67 | if (bind(sock, &server, sizeof(server))) { | |
68 | perror("binding stream socket"); | |
a43acb6b | 69 | exit(1); |
23237d2e KM |
70 | } |
71 | /* Find out assigned port number and print it out */ | |
72 | length = sizeof(server); | |
73 | if (getsockname(sock, &server, &length)) { | |
74 | perror("getting socket name"); | |
a43acb6b | 75 | exit(1); |
23237d2e KM |
76 | } |
77 | printf("Socket has port #%d\en", ntohs(server.sin_port)); | |
78 | ||
79 | /* Start accepting connections */ | |
80 | listen(sock, 5); | |
81 | do { | |
82 | msgsock = accept(sock, 0, 0); | |
a43acb6b MK |
83 | if (msgsock == -1) |
84 | perror("accept"); | |
85 | else do { | |
86 | bzero(buf, sizeof(buf)); | |
23237d2e KM |
87 | if ((rval = read(msgsock, buf, 1024)) < 0) |
88 | perror("reading stream message"); | |
89 | i = 0; | |
90 | if (rval == 0) | |
91 | printf("Ending connection\en"); | |
92 | else | |
93 | printf("-->%s\en", buf); | |
94 | } while (rval != 0); | |
95 | close(msgsock); | |
96 | } while (TRUE); | |
97 | /* | |
98 | * Since this program has an infinite loop, the socket "sock" is | |
99 | * never explicitly closed. However, all sockets will be closed | |
100 | * automatically when a process is killed or terminates normally. | |
101 | */ | |
102 | } |