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Annotation of 43BSDReno/sys/nfs/TEST/unix-tests/tools/udpd.c, revision 1.1.1.1

1.1       root        1: /*     @(#)udpd.c      1.1 88/10/12 NFS Rev 2 Testsuite        */
                      2: /*
                      3:  *  server for simple udp ping program.
                      4:  *  listens on socket for request, then echos back
                      5:  *  request from client.
                      6:  */
                      7: #define UDP_PORT        3457
                      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;                          /* socket */
                     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_DGRAM, IPPROTO_UDP)) < 0)
                     26:                xxit("socket");
                     27: 
                     28:        addr.sin_family = AF_INET;
                     29:        addr.sin_port = htons(UDP_PORT);
                     30:        addr.sin_addr.s_addr = INADDR_ANY;
                     31: 
                     32:        if (bind(s, &addr, addrlen) < 0)
                     33:                xxit("bind");
                     34: 
                     35:        while(1) {
                     36:                fprintf(stderr, "%s awaiting request\n", argv[0]);
                     37:                addrlen = sizeof(struct sockaddr_in);
                     38:                ret = recvfrom(s, buf, BUFSIZ, 0, &addr, &addrlen);
                     39:                if (ret < 0)
                     40:                        xxit("recvfrom");
                     41:                if (hp = gethostbyaddr(&addr.sin_addr, sizeof(addr.sin_addr),
                     42:                                        AF_INET))
                     43:                        fprintf(stderr, "\
                     44: %s: accepted request from host %s\n", argv[0], hp->h_name);
                     45:                else
                     46:                        fprintf(stderr, "\
                     47: %s: accepted request from host %x\n", argv[0], addr.sin_addr.s_addr);
                     48: 
                     49:                fprintf(stderr, " recvfrom ret %d\n", ret);
                     50:                if (ret > 0) {
                     51:                        *buf = *buf + 1;
                     52:                        ret = sendto(s, buf, ret, 0, &addr, addrlen);
                     53:                        fprintf(stderr, " sendto ret %d\n", ret);
                     54:                }
                     55:        }
                     56: }
                     57: 
                     58: xxit(s)
                     59: char *s;
                     60: {
                     61:        perror(s);
                     62:        exit(1);
                     63: }
                     64: 

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