Last change
on this file since 135 was 2, checked in by Rick van der Zwet, 15 years ago |
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File size:
1.5 KB
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[2] | 1 | /* Netlab 2009 - group 1 - assignment 3
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| 2 | * Johan IJsveld
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| 3 | * Rick van der Zwet
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| 4 | */
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| 5 | #include <sys/types.h>
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| 6 | #include <netdb.h>
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| 7 | #include <sysexits.h>
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| 8 | #include <stdio.h>
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| 9 | #include <string.h>
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| 10 | #include <unistd.h>
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| 11 |
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| 12 | #include <sys/socket.h>
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| 13 | #include <netinet/ip.h>
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| 14 | #include <netinet/tcp.h>
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| 15 |
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| 16 | #define LISTEN_BACKLOG 0
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| 17 | #define BUF_SIZE 1000
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| 18 |
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| 19 |
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| 20 | #include <signal.h>
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| 21 |
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| 22 |
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| 23 | int main() {
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| 24 | int conn_fd;
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| 25 | char buf[BUF_SIZE];
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| 26 | ssize_t recv_size;
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| 27 | int retno;
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| 28 |
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| 29 | /* Create a tcp/ip socket */
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| 30 | int mysocket = socket(PF_INET, SOCK_STREAM, 0);
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| 31 |
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| 32 | struct sockaddr_in my_addr;
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| 33 | struct sockaddr_in their_addr;
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| 34 | int sin_size;
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| 35 |
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| 36 |
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| 37 | // ip(7) Create listen port, NOTE addresses in byte-order BYTEORDER(3)
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| 38 | my_addr.sin_family = AF_INET; // By default
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| 39 | my_addr.sin_port = htons(12345);
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| 40 | my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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| 41 | memset(my_addr.sin_zero, '\0', sizeof my_addr.sin_zero);
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| 42 |
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| 43 | // get connected
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| 44 | retno = bind(mysocket, (struct sockaddr *) &my_addr, sizeof(struct sockaddr_in));
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| 45 | retno = listen(mysocket, LISTEN_BACKLOG);
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| 46 | sin_size = sizeof(struct sockaddr_in);
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| 47 |
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| 48 | // Make it a server, e.g. never ending
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| 49 | while(1) {
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| 50 | conn_fd = accept(mysocket, (struct sockaddr *)&their_addr, &sin_size);
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| 51 | if (fork() == 0) {
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| 52 | // child will help to echo the stuff
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| 53 | while(1) {
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| 54 | retno = recv(conn_fd, &buf, BUF_SIZE, 0);
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| 55 | printf("%s\n", buf);
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| 56 | if (retno <= 0)
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| 57 | break;
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| 58 | retno = send(conn_fd, &buf, retno, 0);
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| 59 | if (retno <= 0)
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| 60 | break;
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| 61 | }
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| 62 | close(conn_fd);
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| 63 | }
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| 64 | }
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| 65 | close(mysocket);
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| 66 |
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| 67 |
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| 68 | return EX_OK;
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| 69 | }
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