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Annotation of 43BSD/ucb/talk/get_addrs.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifndef lint
                      8: static char sccsid[] = "@(#)get_addrs.c        5.2 (Berkeley) 3/13/86";
                      9: #endif not lint
                     10: 
                     11: #include "talk_ctl.h"
                     12: #include <netdb.h>
                     13: 
                     14: get_addrs(my_machine_name, his_machine_name)
                     15:        char *my_machine_name, *his_machine_name;
                     16: {
                     17:        struct hostent *hp;
                     18:        struct servent *sp;
                     19: 
                     20:        msg.pid = htonl(getpid());
                     21:        /* look up the address of the local host */
                     22:        hp = gethostbyname(my_machine_name);
                     23:        if (hp == (struct hostent *) 0) {
                     24:                fprintf(stderr,
                     25:                    "talk: %s: Can't figure out network address.\n",
                     26:                    my_machine_name);
                     27:                exit(-1);
                     28:        }
                     29:        bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
                     30:        /*
                     31:         * If the callee is on-machine, just copy the
                     32:         * network address, otherwise do a lookup...
                     33:         */
                     34:        if (strcmp(his_machine_name, my_machine_name)) {
                     35:                hp = gethostbyname(his_machine_name);
                     36:                if (hp == (struct hostent *) 0 ) {
                     37:                        fprintf(stderr,
                     38:                            "talk: %s: Can't figure out network address.\n",
                     39:                            his_machine_name);
                     40:                        exit(-1);
                     41:                }
                     42:                bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length);
                     43:        } else
                     44:                his_machine_addr = my_machine_addr;
                     45:        /* find the server's port */
                     46:        sp = getservbyname("ntalk", "udp");
                     47:        if (sp == 0) {
                     48:                fprintf(stderr, "talk: %s/%s: service is not registered.\n",
                     49:                     "ntalk", "udp");
                     50:                exit(-1);
                     51:        }
                     52:        daemon_port = sp->s_port;
                     53: }

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