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Annotation of 43BSD/old/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        5.1 (Berkeley) 6/6/85";
                      9: #endif not lint
                     10: 
                     11: #include "talk_ctl.h"
                     12: 
                     13: struct hostent *gethostbyname();
                     14: struct servent *getservbyname();
                     15: 
                     16: get_addrs(my_machine_name, his_machine_name)
                     17:        char *my_machine_name;
                     18:        char *his_machine_name;
                     19: {
                     20:        struct hostent *hp;
                     21:        struct servent *sp;
                     22: 
                     23:        msg.pid = getpid();
                     24:        /* look up the address of the local host */
                     25:        hp = gethostbyname(my_machine_name);
                     26:        if (hp == (struct hostent *) 0) {
                     27:                printf("This machine doesn't exist. Boy, am I confused!\n");
                     28:                exit(-1);
                     29:        }
                     30:        bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
                     31:        /* if he is on the same machine, then simply copy */
                     32:        if (bcmp((char *)&his_machine_name, (char *)&my_machine_name,
                     33:            sizeof(his_machine_name)) == 0)
                     34:                bcopy((char *)&my_machine_addr, (char *)&his_machine_addr,
                     35:                    sizeof(his_machine_name));
                     36:        else {
                     37:                /* look up the address of the recipient's machine */
                     38:                hp = gethostbyname(his_machine_name);
                     39:                if (hp == (struct hostent *) 0 ) {
                     40:                        printf("%s is an unknown host\n", his_machine_name);
                     41:                        exit(-1);
                     42:                }
                     43:                bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length);
                     44:        }
                     45:        /* find the daemon portal */
                     46:        sp = getservbyname("talk", "udp");
                     47:        if (sp == 0) {
                     48:                p_error("This machine doesn't support talk");
                     49:                exit(-1);
                     50:        }
                     51:        daemon_port = sp->s_port;
                     52: }

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