void ieee_mainloop(void) {
int16_t cmd = 0;
set_error(ERROR_DOSVERSION);
ieee_data.bus_state = BUS_IDLE;
ieee_data.device_state = DEVICE_IDLE;
for(;;) {
switch(ieee_data.bus_state) {
case BUS_SLEEP: /* BUS_SLEEP */
set_atn_irq(0);
ieee_bus_idle();
set_error(ERROR_OK);
set_busy_led(0);
uart_puts_P(PSTR("ieee.c/sleep ")); set_dirty_led(1);
/* Wait until the sleep key is used again */
while (!key_pressed(KEY_SLEEP))
system_sleep();
reset_key(KEY_SLEEP);
set_atn_irq(1);
update_leds();
ieee_data.bus_state = BUS_IDLE;
break;
case BUS_IDLE: /* BUS_IDLE */
ieee_bus_idle();
while(IEEE_ATN) { ; /* wait for ATN */
if (key_pressed(KEY_NEXT | KEY_PREV | KEY_HOME)) {
change_disk();
} else if (key_pressed(KEY_SLEEP)) {
reset_key(KEY_SLEEP);
ieee_data.bus_state = BUS_SLEEP;
break;
} else if (display_found && key_pressed(KEY_DISPLAY)) {
display_service();
reset_key(KEY_DISPLAY);
}
system_sleep();
}
if (ieee_data.bus_state != BUS_SLEEP)
ieee_data.bus_state = BUS_FOUNDATN;
break;
case BUS_FOUNDATN: /* BUS_FOUNDATN */
ieee_data.bus_state = BUS_ATNPROCESS;
cmd = ieee_getc();
break;
case BUS_ATNPROCESS: /* BUS_ATNPROCESS */
if(cmd < 0) {
uart_putc('c');
ieee_data.bus_state = BUS_IDLE;
break;
} else cmd &= 0xFF;
uart_puts_p("ATN "); uart_puthex(cmd);
uart_putcrlf();
if (cmd == 0x3f) { /* UNLISTEN */
if(ieee_data.device_state == DEVICE_LISTEN) {
ieee_data.device_state = DEVICE_IDLE;
uart_puts_p("UNLISTEN\r\n");
}
ieee_data.bus_state = BUS_IDLE;
break;
} else if (cmd == 0x5f) { /* UNTALK */
if(ieee_data.device_state == DEVICE_TALK) {
ieee_data.device_state = DEVICE_IDLE;
uart_puts_p("UNTALK\r\n");
}
ieee_data.bus_state = BUS_IDLE;
break;
} else if (cmd == (0x40 + device_address)) { /* TALK */
uart_puts_p("TALK ");
uart_puthex(device_address); uart_putcrlf();
ieee_data.device_state = DEVICE_TALK;
/* disk drives never talk immediatly after TALK, so stay idle
and wait for a secondary address given by 0x60-0x6f DATA */
ieee_data.bus_state = BUS_IDLE;
break;
} else if (cmd == (0x20 + device_address)) { /* LISTEN */
ieee_data.device_state = DEVICE_LISTEN;
uart_puts_p("LISTEN ");
uart_puthex(device_address); uart_putcrlf();
ieee_data.bus_state = BUS_IDLE;
break;
} else if ((cmd & 0xf0) == 0x60) { /* DATA */
/* 8250LP sends data while ATN is still active, so wait
for bus controller to release ATN or we will misinterpret
data as a command */
while(!IEEE_ATN);
if(ieee_data.device_state == DEVICE_LISTEN) {
cmd = ieee_listen_handler(cmd);
cmd_handler();
break;
} else if (ieee_data.device_state == DEVICE_TALK) {
ieee_data.secondary_address = cmd & 0x0f;
uart_puts_p("DATA T ");
uart_puthex(ieee_data.secondary_address);
uart_putcrlf();
if(ieee_talk_handler() == TIMEOUT_ABORT) {
ieee_data.device_state = DEVICE_IDLE;
}
ieee_data.bus_state = BUS_IDLE;
break;
} else {
ieee_data.bus_state = BUS_IDLE;
break;
}
} else if (ieee_data.device_state == DEVICE_IDLE) {
ieee_data.bus_state = BUS_IDLE;
break;
/* ----- if we reach this, we're LISTENer or TALKer ----- */
} else if ((cmd & 0xf0) == 0xe0) { /* CLOSE */
ieee_data.secondary_address = cmd & 0x0f;
uart_puts_p("CLOSE ");
uart_puthex(ieee_data.secondary_address);
uart_putcrlf();
/* Close all buffers if sec. 15 is closed */
if(ieee_data.secondary_address == 15) {
free_multiple_buffers(FMB_USER_CLEAN);
} else {
/* Close a single buffer */
buffer_t *buf;
buf = find_buffer (ieee_data.secondary_address);
if (buf != NULL) {
buf->cleanup(buf);
free_buffer(buf);
}
}
ieee_data.bus_state = BUS_IDLE;
break;
} else if ((cmd & 0xf0) == 0xf0) { /* OPEN */
cmd = ieee_listen_handler(cmd);
cmd_handler();
break;
} else {
/* Command for other device or unknown command */
ieee_data.bus_state = BUS_IDLE;
}
break;
} /* switch */
} /* for() */
}
int main(void) {
int result = OK;
/* get the arguments passed in the URL */
process_cgivars();
/* reset internal variables */
reset_cgi_vars();
document_header();
/* validate arguments in URL */
result = validate_arguments();
if(result == ERROR) {
document_footer();
return ERROR;
}
/* read the CGI configuration file */
result = read_cgi_config_file(get_cgi_config_location());
if(result == ERROR) {
printf("<P>Error: Could not open CGI configuration file '%s' for reading!</P>\n", get_cgi_config_location());
document_footer();
return ERROR;
}
/* read the main configuration file */
result = read_main_config_file(main_config_file);
if(result == ERROR) {
printf("<P>Error: Could not open main configuration file '%s' for reading!</P>\n", main_config_file);
document_footer();
return ERROR;
}
/* read all object configuration data */
result = read_all_object_configuration_data(main_config_file, READ_ALL_OBJECT_DATA);
if(result == ERROR) {
printf("<P>Error: Could not read some or all object configuration data!</P>\n");
document_footer();
return ERROR;
}
/* read all status data */
result = read_all_status_data(get_cgi_config_location(), READ_ALL_STATUS_DATA);
if(result == ERROR) {
printf("<P>Error: Could not read host and service status information!</P>\n");
document_footer();
free_memory();
return ERROR;
}
/* get authentication information */
get_authentication_information(¤t_authdata);
/* decide what to display to the user */
if(display_type == DISPLAY_HOST && host_style == DISPLAY_HOST_SERVICES)
display_host_services();
else if(display_type == DISPLAY_HOST)
display_host();
else if(display_type == DISPLAY_SERVICE)
display_service();
else if(display_type == DISPLAY_HOSTGROUP && hostgroup_style == DISPLAY_HOSTGROUP_OVERVIEW)
display_hostgroup_overview();
else if(display_type == DISPLAY_HOSTGROUP && hostgroup_style == DISPLAY_HOSTGROUP_SUMMARY)
display_hostgroup_summary();
else if(display_type == DISPLAY_PING)
display_ping();
else if(display_type == DISPLAY_TRACEROUTE)
display_traceroute();
else if(display_type == DISPLAY_QUICKSTATS)
display_quick_stats();
else if(display_type == DISPLAY_PROCESS)
display_process();
else if(display_type == DISPLAY_ALL_PROBLEMS || display_type == DISPLAY_UNHANDLED_PROBLEMS)
display_problems();
else
display_index();
document_footer();
/* free all allocated memory */
free_memory();
return OK;
}
