diff options
Diffstat (limited to 'usr.bin/talk/get_addrs.c')
| -rw-r--r-- | usr.bin/talk/get_addrs.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/usr.bin/talk/get_addrs.c b/usr.bin/talk/get_addrs.c new file mode 100644 index 0000000..b9db4a6 --- /dev/null +++ b/usr.bin/talk/get_addrs.c @@ -0,0 +1,83 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <protocols/talkd.h> +#include <netdb.h> +#include <stdio.h> +#include "talk_ctl.h" + +get_addrs(my_machine_name, his_machine_name) + char *my_machine_name, *his_machine_name; +{ + struct hostent *hp; + struct servent *sp; + + msg.pid = htonl(getpid()); + /* look up the address of the local host */ + hp = gethostbyname(my_machine_name); + if (hp == NULL) { + fprintf(stderr, "talk: %s: ", my_machine_name); + herror((char *)NULL); + exit(-1); + } + bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length); + /* + * If the callee is on-machine, just copy the + * network address, otherwise do a lookup... + */ + if (strcmp(his_machine_name, my_machine_name)) { + hp = gethostbyname(his_machine_name); + if (hp == NULL) { + fprintf(stderr, "talk: %s: ", his_machine_name); + herror((char *)NULL); + exit(-1); + } + bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length); + } else + his_machine_addr = my_machine_addr; + /* find the server's port */ + sp = getservbyname("ntalk", "udp"); + if (sp == 0) { + fprintf(stderr, "talk: %s/%s: service is not registered.\n", + "ntalk", "udp"); + exit(-1); + } + daemon_port = sp->s_port; +} |
