BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / tests / nfs / unix-tests / tools / tcpd.c

/*      @(#)tcpd.c      1.1 88/10/12 NFS Rev 2 Testsuite        */
/*
*  server for simple tcp ping program.
*  listens on socket for connection request, then echos back
*  request from client.
*/
#define TCP_PORT        3456

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

main(argc, argv)
char **argv;
{
       int s, ns;                      /* sockets */
       struct sockaddr_in addr;        /* socket address */
       int ret;
       int addrlen = sizeof(struct sockaddr_in);
       struct hostent *hp;
       char buf[BUFSIZ];

       if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
               xxit("socket");

       addr.sin_family = AF_INET;
       addr.sin_port = htons(TCP_PORT);
       addr.sin_addr.s_addr = INADDR_ANY;

       if (bind(s, &addr, addrlen) < 0)
               xxit("bind");

       if (listen(s, 5) < 0)
               xxit("listen");

       while(1) {
               fprintf(stderr, "%s awaiting accept\n", argv[0]);
               addrlen = sizeof(struct sockaddr_in);
               if ((ns = accept(s, &addr, &addrlen)) < 0)
                       xxit("accept");
               if (hp = gethostbyaddr(&addr.sin_addr, sizeof(addr.sin_addr),
                                       AF_INET))
                       fprintf(stderr, "\
%s: accepted connection from host %s\n", argv[0], hp->h_name);
               else
                       fprintf(stderr, "\
%s: accepted connection from host %x\n", argv[0], addr.sin_addr.s_addr);

               ret = read(ns, buf, BUFSIZ);
               fprintf(stderr, " read ret %d\n", ret);
               if (ret > 0) {
                       *buf = *buf + 1;
                       ret = write(ns, buf, ret);
                       fprintf(stderr, " write ret %d\n", ret);
               }
               sleep(5);
               close(ns);
       }
}

xxit(s)
char *s;
{
       perror(s);
       exit(1);
}