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Annotation of 43BSDReno/sys/nfs/TEST/unix-tests/tools/tcpd.c, revision 1.1

1.1     ! root        1: /*     @(#)tcpd.c      1.1 88/10/12 NFS Rev 2 Testsuite        */
        !             2: /*
        !             3:  *  server for simple tcp ping program.
        !             4:  *  listens on socket for connection request, then echos back
        !             5:  *  request from client.
        !             6:  */
        !             7: #define TCP_PORT        3456
        !             8: 
        !             9: #include <stdio.h>
        !            10: #include <sys/types.h>
        !            11: #include <sys/socket.h>
        !            12: #include <netinet/in.h>
        !            13: #include <netdb.h>
        !            14: 
        !            15: main(argc, argv)
        !            16: char **argv;
        !            17: {
        !            18:        int s, ns;                      /* sockets */
        !            19:        struct sockaddr_in addr;        /* socket address */
        !            20:        int ret;
        !            21:        int addrlen = sizeof(struct sockaddr_in);
        !            22:        struct hostent *hp;
        !            23:        char buf[BUFSIZ];
        !            24: 
        !            25:        if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
        !            26:                xxit("socket");
        !            27: 
        !            28:        addr.sin_family = AF_INET;
        !            29:        addr.sin_port = htons(TCP_PORT);
        !            30:        addr.sin_addr.s_addr = INADDR_ANY;
        !            31: 
        !            32:        if (bind(s, &addr, addrlen) < 0)
        !            33:                xxit("bind");
        !            34: 
        !            35:        if (listen(s, 5) < 0)
        !            36:                xxit("listen");
        !            37: 
        !            38:        while(1) {
        !            39:                fprintf(stderr, "%s awaiting accept\n", argv[0]);
        !            40:                addrlen = sizeof(struct sockaddr_in);
        !            41:                if ((ns = accept(s, &addr, &addrlen)) < 0)
        !            42:                        xxit("accept");
        !            43:                if (hp = gethostbyaddr(&addr.sin_addr, sizeof(addr.sin_addr),
        !            44:                                        AF_INET))
        !            45:                        fprintf(stderr, "\
        !            46: %s: accepted connection from host %s\n", argv[0], hp->h_name);
        !            47:                else
        !            48:                        fprintf(stderr, "\
        !            49: %s: accepted connection from host %x\n", argv[0], addr.sin_addr.s_addr);
        !            50: 
        !            51:                ret = read(ns, buf, BUFSIZ);
        !            52:                fprintf(stderr, " read ret %d\n", ret);
        !            53:                if (ret > 0) {
        !            54:                        *buf = *buf + 1;
        !            55:                        ret = write(ns, buf, ret);
        !            56:                        fprintf(stderr, " write ret %d\n", ret);
        !            57:                }
        !            58:                sleep(5);
        !            59:                close(ns);
        !            60:        }
        !            61: }
        !            62: 
        !            63: xxit(s)
        !            64: char *s;
        !            65: {
        !            66:        perror(s);
        !            67:        exit(1);
        !            68: }
        !            69: 

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