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/* $OpenBSD: get_addrs.c,v 1.10 2016/02/01 07:29:25 mestre Exp $ */ |
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/* $NetBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc Exp $ */ |
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/* |
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* Copyright (c) 1983, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <err.h> |
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#include <netdb.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "talk.h" |
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#include "talk_ctl.h" |
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void |
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get_addrs(char *my_machine_name, char *his_machine_name) |
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{ |
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struct hostent *hp; |
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struct servent *sp; |
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msg.pid = htonl(getpid()); |
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/* look up the address of the local host */ |
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hp = gethostbyname(my_machine_name); |
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if (hp == NULL) |
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errx(1, "%s: %s", my_machine_name, hstrerror(h_errno)); |
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bcopy(hp->h_addr, &my_machine_addr, hp->h_length); |
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/* |
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* If the callee is on-machine, just copy the |
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* network address, otherwise do a lookup... |
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*/ |
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if (strcmp(his_machine_name, my_machine_name)) { |
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hp = gethostbyname(his_machine_name); |
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if (hp == NULL) |
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errx(1, "%s: %s", his_machine_name, hstrerror(h_errno)); |
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bcopy(hp->h_addr, &his_machine_addr, hp->h_length); |
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} else |
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his_machine_addr = my_machine_addr; |
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/* find the server's port */ |
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sp = getservbyname("ntalk", "udp"); |
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if (sp == NULL) |
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errx(1, "ntalk/udp: service is not registered."); |
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daemon_port = sp->s_port; |
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} |