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/* This file is part of the Project Athena Zephyr Notification System.
* It contains the hostmanager client program.
*
* Created by: David C. Jedlinsky
*
* $Source$
* $Author$
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include <zephyr/mit-copyright.h>
#include <zephyr/zephyr.h>
#ifndef lint
static char rcsid_hm_c[] = "$Header$";
#endif lint
#include <syslog.h>
#include <signal.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/param.h>
#ifdef DEBUG
#define DPR(a) fprintf(stderr, a)
#define DPR2(a,b) fprintf(stderr, a, b)
#else
#define DPR(a)
#define DPR2(a,b)
#endif
#define ever (;;)
#define Zperr(e) fprintf(stderr, "Error = %d\n", e)
int serv_sock;
struct sockaddr_in cli_sin, serv_sin, from;
extern int errno;
main(argc, argv)
char *argv[];
{
struct hostent *hp;
struct servent *sp;
int cli_port;
ZPacket_t packet;
ZNotice_t notice;
int auth, len;
Code_t repl;
char hostname[MAXHOSTNAMELEN];
if (argc < 2) {
printf("Usage: %s server_machine\n", argv[0]);
exit(-1);
}
ZInitialize();
gethostname(hostname, MAXHOSTNAMELEN);
/* Open client socket, for receiving client and server notices */
sp = getservbyname("zephyr-hm", "udp");
cli_port = ntohs(sp->s_port);
if ((repl = ZOpenPort(&cli_port)) != ZERR_NONE) {
Zperr(repl);
com_err("hm", repl, "opening port");
}
cli_sin = ZGetDestAddr();
cli_sin.sin_port = sp->s_port;
/* Open the server socket */
sp = getservbyname("zephyr-clt", "udp");
serv_sin.sin_port = sp->s_port;
if ((serv_sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0) {
printf("server socket failed\n");
exit(1);
}
DPR2 ("zephyr server port: %u\n", ntohs(serv_sin.sin_port));
DPR2 ("zephyr client port: %u\n", cli_port);
/* This is here until hesiod or something that can find NS is put in */
/* who to talk to */
if ((hp = gethostbyname(argv[1])) == NULL) {
printf("gethostbyname failed\n");
exit(1);
}
/* Set up communications with server */
/* target is "zephyr-clt" port on server machine */
serv_sin.sin_family = AF_INET;
bcopy(hp->h_addr, &serv_sin.sin_addr, hp->h_length);
/* Set up server notice */
notice.z_kind = ACK;
notice.z_checksum[0] = 0x100;
notice.z_checksum[1] = 0x200;
notice.z_port = (short) cli_port;
notice.z_class = "HMBOOT";
notice.z_class_inst = hostname;
notice.z_opcode = "opcode";
notice.z_sender = "sender";
notice.z_recipient = "recip";
notice.z_message_len = 0;
/* send it off, using ZSendNotice */
/* Sleep with wakeup call set */
for ever {
DPR ("Waiting for a packet...");
if ((repl = ZReceivePacket(packet, sizeof packet,
&len, &from)) != ZERR_NONE) {
Zperr(repl);
com_err("hm", repl, "receiving packet");
} else {
if ((repl = ZParseNotice(packet, len,
¬ice, &auth)) != ZERR_NONE) {
Zperr(repl);
com_err("hm", repl, "parsing notice");
}
/* Where did it come from? */
DPR ("Got a packet.\n");
/* Client program... */
transmission_tower(¬ice);
}
}
}
/* This will eventually use Hesiod */
find_next_server(current_hostent)
struct hostent **current_hostent;
{
if ((*current_hostent = gethostbyname("hal")) == NULL) {
perror("gethostbyname failed\n");
exit(1);
}
}
server_manager(notice)
ZNotice_t notice;
{
printf("A notice came in from the server.\n");
}
transmission_tower(notice)
ZNotice_t *notice;
{
ZNotice_t gack;
Code_t repl;
struct sockaddr_in gsin;
gack = *notice;
DPR2 ("Message = %s\n", gack.z_message);
gack.z_kind = HMACK;
gack.z_message_len = 0;
/* Make library think the client is the HM */
gsin = cli_sin;
gsin.sin_port = htons(gack.z_port);
if (gack.z_port == 0) {
gack.z_port = ntohs(from.sin_port);
gsin.sin_port = from.sin_port;
}
DPR2 ("Client Port = %u\n", gack.z_port);
if ((repl = ZSetDestAddr(&gsin)) != ZERR_NONE) {
Zperr(repl);
com_err("hm", repl, "setting destination");
}
if ((repl = ZSendRawNotice(&gack)) != ZERR_NONE) {
Zperr(repl);
com_err("hm", repl, "sending raw notice");
}
gsin = serv_sin;
DPR2 ("Server Port = %u\n", ntohs(gsin.sin_port));
if ((repl = ZSetDestAddr(&gsin)) != ZERR_NONE) {
printf("Error = %d\n", repl);
com_err("hm", repl, "setting destination");
}
if ((repl = ZSendRawNotice(notice)) != ZERR_NONE) {
printf("Error = %d\n", repl);
com_err("hm", repl, "while sending raw notice");
}
add_notice_to_queue(notice);
}
new_server()
{
perror("server going down.\n");
exit(1);
}
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