Hplip分析
版本号是2.14,源代码位置:http://hplipopensource.com。
图的来源：http://hplipopensource.com/node/128。
实践中使用的打印机型号:Deskjet 1010.分析的目的就是搞清楚一个灰色地带---打印机通信.
1.D-Bus初始化流程
D-Bus的初始化相同是在ui4/devmgr5.py開始的。
ui4/devmgr5.py
01 class DevMgr5(QMainWindow, Ui_MainWindow):
02 ......
03 # TODO: Make sbus init mandatory success, else exit
04 def initDBus(self):
05 self.dbus_loop = DBusQtMainLoop(set_as_default=True)
06 self.dbus_avail, self.service, self.session_bus = device.init_dbus(self.dbus_loop)
07 ......
08 # Receive events from the session bus
09 self.session_bus.add_signal_receiver(self.handleSessionSignal, sender_keyword=\'sender\',
10 destination_keyword=\'dest\', interface_keyword=\'interface\',
11 member_keyword=\'member\', path_keyword=\'path\')
12 ......
这里调用了base/device.py中的init_dbus()。从第9行能够看出handleSessionSignal是D-Busserver端回调函数。
base/device.py
01 #
02 # DBus Support
03 #
04
05 def init_dbus(dbus_loop=None):
06 ......
07 try:
08 if dbus_loop is None:
09 session_bus = dbus.SessionBus()
10 else:
11 session_bus = dbus.SessionBus(dbus_loop)
12 ......
13 try:
14 log.debug("Connecting to com.hplip.StatusService (try #1)...")
15 service = session_bus.get_object(\'com.hplip.StatusService\', "/com/hplip/StatusService")
16 dbus_avail = True
17 except dbus.exceptions.DBusException, e:
18 try:
19 os.waitpid(-1, os.WNOHANG)
20 except OSError:
21 pass
22
23 path = utils.which(\'hp-systray\')
24 ......
25 log.debug("Running hp-systray: %s --force-startup" % path)
26
27 os.spawnlp(os.P_NOWAIT, path, \'hp-systray\', \'--force-startup\')
28
29 log.debug("Waiting for hp-systray to start...")
30 time.sleep(1)
31
32 t = 2
33 while True:
34 try:
35 log.debug("Connecting to com.hplip.StatusService (try #%d)..." % t)
36 service = session_bus.get_object(\'com.hplip.StatusService\', "/com/hplip/StatusService")
37 ......
38
39 return dbus_avail, service, session_bus
40
41 ......
42
第27行启动了hp-systray作为d-bus的server端。D-busserver端启动完成。
2.D-busserverhp-systray端启动
启动命令例如以下：
$ hp-systray --force-startup -g
说明:-g是调试模式启动
if __name__ == \'__main__\':
......
if child_pid1:
# parent (UI)
os.close(w1)
......
else: # qt4
try:
import ui4.systemtray as systray
except ImportError:
log.error("Unable to load Qt4 support. Is it installed?")
mod.unlockInstance()
sys.exit(1)
try:
systray.run(r1)
finally:
mod.unlockInstance()
else:
# child (dbus & device i/o [qt4] or dbus [qt3])
os.close(r1)
if ui_toolkit == \'qt4\':
r2, w2 = os.pipe()
r3, w3 = os.pipe()
child_pid2 = os.fork()
if child_pid2:
# parent (dbus)
os.close(r2)
import hpssd
hpssd.run(w1, w2, r3)
else:
# child (device i/o)
os.close(w2)
import hpdio
hpdio.run(r2, w3)
......
启动了hpssd和hpdio。hpssd前者会从w3管道从读取hpdio写入的打印机状态信息。
以下单说hpdio怎样获取打印机状态当hpdio run起来的时候会做以下调用run(hpdio.py)->queryDevice(device.py)->status.StatusType10(status.py)->StatusType10Status(status.py)来获取打印机状态。
在queryDevice这个函数中出现了6种与打印机通信方式,各自是:
- Type 1/2 (s: or VSTATUS:) status
- Type 3/9 LaserJet PML
- Type 6: LJ XML
- Type 8: LJ PJL
- Type 10: LEDM
- Type 11: LEDM_FF_CC_0
而我眼下分析的这款打印机使用是第5种Type 10: LEDM通信协议 HPMUD_S_EWS_LEDM_CHANNEL。每种通信通信都有关于打印机状态值的定义,另外从这款打印机的DeviceId能够看出应该同一时候也是支持PJL的,这里先仅仅说第5种LEDM通信方式.LEDM的大体通信方式是基于HTTP,通信USB传输一个HTTP的GET指令,然后再通过USB读取打印机返回的HTTP超文本,一个是XML.
StatusType10Status调用流程：
- StatusType10FetchUrl 从打印机获取状态数据
- # Parse the product status XML 解析xml，提取状态值
- getUrl_LEDM
- LocalOpenerEWS_LEDM().openhp()
- writeEWS_LEDM
- readEWS_LEDM
- readLEDMData
3.刷新状态的流程
toolbox.py
01 else: # qt4
02 ......
03 from ui4.devmgr5 import DevMgr5
04 ......
第三行能够看出启动了ui4文件夹下的devmgr5这个python。
ui4/devmgr5.py
01 class DevMgr5(QMainWindow, Ui_MainWindow):
02 ......
03 def initUI(self):
04 ......
05 self.DeviceRefreshAction.setIcon(QIcon(load_pixmap("refresh1", "16x16")))
06 self.connect(self.DeviceRefreshAction, SIGNAL("triggered()"), self.DeviceRefreshAction_activated)
07 ......
08 def DeviceRefreshAction_activated(self):
09 self.DeviceRefreshAction.setEnabled(False)
10 self.requestDeviceUpdate()
11 self.DeviceRefreshAction.setEnabled(True)
12 ......
13 def requestDeviceUpdate(self, dev=None, item=None):
14 """ Submit device update request to update thread. """
15
16 if dev is None:
17 dev = self.cur_device
18
19 if dev is not None:
20 dev.error_state = ERROR_STATE_REFRESHING
21 self.updateDevice(dev, update_tab=False)
22
23 self.sendMessage(dev.device_uri, \'\', EVENT_DEVICE_UPDATE_REQUESTED)
24 ......
25 def sendMessage(self, device_uri, printer_name, event_code, username=prop.username,
26 job_id=0, title=\'\'):
27
28 device.Event(device_uri, printer_name, event_code, username,
29 job_id, title).send_via_dbus(self.session_bus)
30 .....
从第06行能够看出DeviceRefreshAction的槽是DeviceRefreshAction_activated在行8行，接着调用了requestDeviceUpdate。然后调用了sendMessage。然后调用了device.Event。这个在device.py中。在
base/device.py
01 class Event(object):
02 ......
03 def send_via_dbus(self, session_bus, interface=\'com.hplip.StatusService\'):
04 if session_bus is not None and dbus_avail:
05 log.debug("Sending event %d to %s (via dbus)..." % (self.event_code, interface))
06 msg = lowlevel.SignalMessage(\'/\', interface, \'Event\')
07 msg.append(signature=self.dbus_fmt, *self.as_tuple())
08 session_bus.send_message(msg)
09 ......
10
这里调用的send_message是获取的d-bus实例的send_message,它在hpdio.py中。
hpdio.py
01 def send_message(device_uri, event_code, bytes_written=0):
02 args = [device_uri, \'\', event_code, prop.username, 0, \'\', \'\', bytes_written]
03 msg = lowlevel.SignalMessage(\'/\', \'com.hplip.StatusService\', \'Event\')
04 msg.append(signature=\'ssisissi\', *args)
05 SessionBus().send_message(msg)
这里是标准的d-bus通信。D-bus在收到这个消息后，会怎么处理，且看以后分析。以上是向server端请求事件。server端收到事件后会调用handleSessionSignal回调。
handleSessionSignal -> handleStatusReply -> updateDevice。
4.client与server端交互
clienthp-toolbox,server端hp-systray.他们分别启动后,怎样进行交互是一个重点,基于server端是有自己的消息通知和界面显示的,只是仅仅是一般的事件信息。
hp-toolbox能够主动获取打印机信息。
server端会主动向打印机设备获取状态信息，client获取的要是server保存好的状态信息。这个基本属于 生产者-消费者 之间的关系。
5.LEDM通信协议
全称： Low End Data Model（在hplib的status.py中有介绍：def StatusType10(func): # Low End Data Model）。
眼下已经是HP一个专利：专利EP2556480A1.
打开channel调用流程：
openEWS_LEDM -> __openChannel -> hpmudext.open_channel -> hpmud处理
读数据流程：
readEWS_LEDM -> __readChannel -> hpmudext.read_channel -> hpmud处理
写命令流程：
writeEWS_LEDM -> __writeChannel -> hpmudext.write_channel -> hpmud处理
以获取ProductStatusDyn记录一下收发数据的情况。
发送命令（报文）：
GET /DevMgmt/ProductStatusDyn.xml HTTP/1.1#015#012Accept: text/plain#015#012Host:localhost#015#012User-Agent:hplip#015#012#015#012接收数据：
<?xml version="1.0" encoding="UTF-8"?> <!-- THIS DATA SUBJECT TO DISCLAIMER(S) INCLUDED WITH THE PRODUCT OF ORIGIN. --> <psdyn:ProductStatusDyn xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:dd="http://www.hp.com/schemas/imaging/con/dictionaries/1.0/" xmlns:ad="http://www.hp.com/schemas/imaging/con/ledm/alertdetails/2007/10/31" xmlns:pscat="http://www.hp.com/schemas/imaging/con/ledm/productstatuscategories/2007/10/31" xmlns:locid="http://www.hp.com/schemas/imaging/con/ledm/localizationids/2007/10/31" xmlns:psdyn="http://www.hp.com/schemas/imaging/con/ledm/productstatusdyn/2007/10/31" xsi:schemaLocation="http://www.hp.com/schemas/imaging/con/dictionaries/1.0/ ../schemas/dd/DataDictionaryMasterLEDM.xsd http://www.hp.com/schemas/imaging/con/ledm/alertdetails/2007/10/31 ../schemas/AlertDetails.xsd http://www.hp.com/schemas/imaging/con/ledm/productstatuscategories/2007/10/31 ../schemas/ProductStatusCategories.xsd http://www.hp.com/schemas/imaging/con/ledm/localizationids/2007/10/31 ../schemas/LocalizationIds.xsd http://www.hp.com/schemas/imaging/con/ledm/productstatusdyn/2007/10/31 ../schemas/ProductStatusDyn.xsd"> <dd:Version> <dd:Revision>SVN-IPG-LEDM.216</dd:Revision> <dd:Date>2011-02-08</dd:Date> </dd:Version> <psdyn:Status> <pscat:StatusCategory>closeDoorOrCover</pscat:StatusCategory> <locid:StringId>65568</locid:StringId> </psdyn:Status> <psdyn:AlertTable> <dd:ModificationNumber>6</dd:ModificationNumber> <psdyn:Alert> <ad:ProductStatusAlertID>closeDoorOrCover</ad:ProductStatusAlertID> <locid:StringId>65568</locid:StringId> <dd:SequenceNumber>5</dd:SequenceNumber> <ad:Severity>Error</ad:Severity> <ad:AlertPriority>1</ad:AlertPriority> <ad:AlertDetails> <ad:AlertDetailsDoorCoverLocation>cover</ad:AlertDetailsDoorCoverLocation> </ad:AlertDetails> <dd:ResourceURI>/DevMgmt/ProductConfigDyn.xml</dd:ResourceURI> <dd:ResourceType>ledm:hpLedmProductConfigDyn</dd:ResourceType> </psdyn:Alert> <psdyn:Alert> <ad:ProductStatusAlertID>cartridgeMissing</ad:ProductStatusAlertID> <locid:StringId>65537</locid:StringId> <dd:SequenceNumber>4</dd:SequenceNumber> <ad:Severity>Error</ad:Severity> <ad:AlertPriority>11</ad:AlertPriority> <ad:AlertDetails> <ad:AlertDetailsMarkerColor>Black</ad:AlertDetailsMarkerColor> <ad:AlertDetailsConsumableTypeEnum>inkCartridge</ad:AlertDetailsConsumableTypeEnum> <ad:AlertDetailsMarkerLocation>1</ad:AlertDetailsMarkerLocation> </ad:AlertDetails> <dd:ResourceURI>/DevMgmt/ConsumableConfigDyn.xml</dd:ResourceURI> <dd:ResourceType>ledm:hpLedmConsumableConfigDyn</dd:ResourceType> </psdyn:Alert> <psdyn:Alert> <ad:ProductStatusAlertID>cartridgeMissing</ad:ProductStatusAlertID> <locid:StringId>65537</locid:StringId> <dd:SequenceNumber>3</dd:SequenceNumber> <ad:Severity>Error</ad:Severity> <ad:AlertPriority>11</ad:AlertPriority> <ad:AlertDetails> <ad:AlertDetailsMarkerColor>CyanMagentaYellow</ad:AlertDetailsMarkerColor> <ad:AlertDetailsConsumableTypeEnum>inkCartridge</ad:AlertDetailsConsumableTypeEnum> <ad:AlertDetailsMarkerLocation>0</ad:AlertDetailsMarkerLocation> </ad:AlertDetails> <dd:ResourceURI>/DevMgmt/ConsumableConfigDyn.xml</dd:ResourceURI> <dd:ResourceType>ledm:hpLedmConsumableConfigDyn</dd:ResourceType> </psdyn:Alert> </psdyn:AlertTable> </psdyn:ProductStatusDyn>pscat:StatusCategory字段记录的正是打印机的当前状态。
6.hpmud分析
MUlti-point transport Driver or HPMUD represents the I/O layer for HPLIP. HPMUD does not depend on Linux specific libusb extensions. This means any UNIX/Linux derivative that supports libusb may work with HPLIP. A public HPLIP "C" API is exposed through hpmud. See hpmud.h for documentation. A python wrapper for hpmud, called hpmudext, is also available.
以上是官网介绍，如开头图中所看到的，hpmud是负责真正和打印机设备进行通信的，它基于libusb开发，所以能够执行于所以含libusb的系统中。
hpmud相同实现了多种通信方式：
- musb 基于眼下经常使用的libusb通信.（本次採用打印机正是用这样的方式）
- musb_libusb01 基于眼下较老版本号的libusb通信.
- jd 基于jetdirect 的打印机通信.
- pml 和python层相应。是一种打印语言
- pp Parallel port 并口通信方式
7.C语言实现状态获取
#include <stdio.h>
#include <string.h>
#include <hpmud.h>
#include <malloc.h>
#ifdef DEBUG
#define debug(fmt,args...) debug (fmt ,##args)
#define debugX(level,fmt,args...) if (DEBUG>=level) debug(fmt,##args);
#else
#define debug(fmt,args...)
#define debugX(level,fmt,args...)
#endif /* DEBUG */
static HPMUD_DEVICE dd;
static HPMUD_CHANNEL cd;
#define MALLOC(type, n) (type*)malloc(n*sizeof(type))
static int __readChannel(int bytes_to_read, int* reply, int allow_short_read, int timeout)
{
bytes_to_read = 1024;
char data[1024] = {0};
int ret = 0;
int num_bytes = 0;
int len = 0;
int *p = reply;
while (1)
{
ret = hpmud_read_channel(dd, cd, data, 1024, timeout, &num_bytes);
debug("Result code=%d\n", ret);
len = strlen(data);
if(ret == HPMUD_R_IO_TIMEOUT)
{
debug("I/O timeout\n");
break;
}
if(ret != HPMUD_R_OK)
{
debug("Channel read error\n");
break;
}
//debug("read_buf:%s\n", data);
if(!len)
{
debug("End of data\n");
break;
}
memcpy(p, data, len);
if (num_bytes == bytes_to_read)
{
debug("Full read complete.\n");
break;
}
if (allow_short_read && (num_bytes < bytes_to_read))
{
debug("Allowed short read of %d of %d bytes complete.\n", num_bytes, bytes_to_read);
break;
}
}
debug("Saved %d total bytes to stream.\n", num_bytes);
return num_bytes;
}
void readLEDMData()
{
int timeout = 6;
const char* END_OF_DATA="0\r\n\r\n";
int bytes_read = 0;
int bytes_requested = 1024;
char temp_buf[1024] = {0}; //大小要一致
int chunkedFlag = 1;
char* result = NULL;
char *reply = (int*)MALLOC(unsigned char, 5*1024);
char *offset = reply;
if(reply == NULL)
{
fprintf(stderr, "MALLC FAILURE!\n");
return;
}
bytes_read = __readChannel(bytes_requested, reply, 1, timeout);
offset += bytes_read;
//debug("%s:%s\n", __func__, reply);
// 默认chunked分块.
chunkedFlag = 1;
//result = strtok(reply, "\n");
//debug("result=%s\n", result);
while (bytes_read > 0)
{
bytes_read = __readChannel(bytes_requested, (int*)temp_buf, 1, timeout);
//reply.write(temp_buf.getvalue());
memcpy(offset, temp_buf, bytes_read);
debug("%s:%s\n", __func__, offset);
offset += bytes_read;
if(!chunkedFlag) // Unchunked data
{
// do nothing!
}
else // Chunked data end
{
//END_OF_DATA == temp_buf.getvalue();
if(!strncmp(temp_buf, END_OF_DATA, sizeof(END_OF_DATA)))
break;
}
}
printf("%s:%s\n", __func__, reply);
free(reply);
reply = NULL;
}
int main(void)
{
enum HPMUD_RESULT res;
const char *device_uri = "hp:/usb/Deskjet_1010_series?serial=CN39I18M1805S8";
enum HPMUD_IO_MODE io_mode = HPMUD_RAW_MODE;
// 打开设备获得
res = hpmud_open_device(device_uri, io_mode, &dd);
if (res != HPMUD_R_OK)
{
fprintf(stderr, "error opening device (code=%d)\n", res);
return 1;
}
// 打开频道获得频道id
res = hpmud_open_channel(dd, HPMUD_S_EWS_LEDM_CHANNEL, &cd);
if (res != HPMUD_R_OK)
{
fprintf(stderr, "error opening channel (code=%d)\n", res);
return 1;
}
char buf[1024] = "GET /DevMgmt/ProductStatusDyn.xml HTTP/1.1\r\nAccept: text/plain\r\nHost:localhost\r\nUser-Agent:hplip\r\n\r\n";
//char ConsumableConfigDyn[] = "GET /DevMgmt/ConsumableConfigDyn.xml HTTP/1.1#015#012Accept: text/plain#015#012Host:localhost#015#012User-Agent:hplip#015#012#015#012";
int bit = 0;
// 写入命令
res = hpmud_write_channel(dd, cd, buf, 100, 6, &bit);
if (res != HPMUD_R_OK)
{
fprintf(stderr, "error hpmud_write_channel (code=%d)\n", res);
return 1;
}
readLEDMData();
return 0;
hpmud_close_channel(dd, cd);
hpmud_close_device(dd);
return 0;
}本程序会从打印出所得到状态的数据，pscat:StatusCategory字段中的就是状态值了，事实上能到了如《关于打印机状态的获取》提到15个左右的状态，可是这个协议所规定的状态所有罗列出来：
|
字串 |
状态 |
编号 |
|
processing |
STATUS_PRINTER_PRINTING |
1002 |
|
ready |
STATUS_PRINTER_IDLE |
1000 |
|
closeDoorOrCover |
STATUS_PRINTER_DOOR_OPEN |
1802 |
|
shuttingDown |
STATUS_PRINTER_TURNING_OFF |
1003 |
|
cancelJob |
STATUS_PRINTER_CANCELING |
1005 |
|
trayEmptyOrOpen |
STATUS_PRINTER_OUT_OF_PAPER |
1009 |
|
jamInPrinter |
STATUS_PRINTER_MEDIA_JAM |
1014 |
|
hardError |
STATUS_PRINTER_HARD_ERROR |
1018 |
|
outputBinFull |
STATUS_PRINTER_OUTPUT_BIN_FULL |
1002 |
|
unexpectedSizeInTray sizeMismatchInTray |
STATUS_PRINTER_MEDIA_SIZE_MISMATCH |
1023 |
|
insertOrCloseTray2 |
STATUS_PRINTER_TRAY_2_MISSING |
1029 |
|
scannerError |
EVENT_SCANNER_FAIL |
2002 |
|
scanProcessing |
EVENT_START_SCAN_JOB |
2000 |
|
scannerAdfLoaded |
EVENT_SCAN_ADF_LOADED |
2004 |
|
scanToDestinationNotSet |
EVENT_SCAN_TO_DESTINATION_NOTSET |
2005 |
|
scanWaitingForPC |
EVENT_SCAN_WAITING_FOR_PC |
2006 |
|
scannerAdfJam |
EVENT_SCAN_ADF_JAM |
2007 |
|
scannerAdfDoorOpen |
EVENT_SCAN_ADF_DOOR_OPEN |
2008 |
|
faxProcessing |
EVENT_START_FAX_JOB |
3000 |
|
faxSending |
STATUS_FAX_TX_ACTIVE |
3004 |
|
faxReceiving |
STATUS_FAX_RX_ACTIVE |
3005 |
|
faxDialing |
EVENT_FAX_DIALING |
3006 |
|
faxConnecting |
EVENT_FAX_CONNECTING |
3007 |
|
faxSendError |
EVENT_FAX_SEND_ERROR |
3008 |
|
faxErrorStorageFull |
EVENT_FAX_ERROR_STORAGE_FULL |
3009 |
|
faxReceiveError |
EVENT_FAX_RECV_ERROR |
3010 |
|
faxBlocking |
EVENT_FAX_BLOCKING |
3011 |
|
inPowerSave |
STATUS_PRINTER_POWER_SAVE |
1046 |
|
incorrectCartridge |
STATUS_PRINTER_CARTRIDGE_WRONG |
1047 |
|
cartridgeMissing |
STATUS_PRINTER_CARTRIDGE_MISSING |
1048 |
|
missingPrintHead |
STATUS_PRINTER_PRINTHEAD_MISSING
|
1049 |
|
scannerADFMispick |
STATUS_SCANNER_ADF_MISPICK |
1050 |
|
mediaTooShortToAutoDuplex |
STATUS_PRINTER_PAPER_TOO_SHORT_TO_AUTODUPLEX |
1051 |
|
insertOrCloseTray |
STATUS_PRINTER_TRAY_2_3_DOOR_OPEN |
1052 |
|
inkTooLowToPrime |
STATUS_PRINTER_INK_TOO_LOW_TO_PRIME |
1053 |
|
cartridgeVeryLow |
STATUS_PRINTER_VERY_LOW_ON_INK |
1054 |
|
wasteMarkerCollectorAlmostFull |
STATUS_PRINTER_SERVICE_INK_CONTAINER_ALMOST_FULL |
1055 |
|
wasteMarkerCollectorFull |
STATUS_PRINTER_SERVICE_INK_CONTAINER_FULL |
1056 |
|
wasteMarkerCollectorFullPrompt |
STATUS_PRINTER_SERVICE_INK_CONTAINER_FULL_PROMPT |
1057 |
|
missingDuplexer |
STATUS_PRINTER_DUPLEX_MODULE_MISSING |
1058 |
|
printBarStall |
STATUS_PRINTER_PRINTHEAD_JAM |
1059 |
|
outputBinClosed |
STATUS_PRINTER_CLEAR_OUTPUT_AREA |
1060 |
|
outputBinOpened |
STATUS_PRINTER_CLEAR_OUTPUT_AREA |
1060 |
|
reseatDuplexer |
STATUS_PRINTER_RESEAT_DUPLEXER |
1061 |
|
unexpectedTypeInTray |
STATUS_PRINTER_MEDIA_TYPE_MISMATCH |
1042 |
|
manuallyFeed |
STATUS_MANUALLY_FEED |
1062 |
|
|
STATUS_UNKNOWN_CODE |
1065 |
扩展：眼下仅仅是上一个课题的总结。这之后的应用还有不少的问题，怎样应用。以及和利用设备节点打印是否冲突，以及是否能打印也基于hpmud。
。。
8.意外收获
老天真的会眷恋努力的人，刚在PC上实现基于HPMUD的状态获取，考虑着进行三步走中的更为繁琐的后两步(移植到嵌入式Linux+移植到Android)的时候，上天又送我一份大礼－－打印机状态获取的还有一种方式：通过DeviceId。
这个可能不一定适合全部打印机。可是能够确定的是全然适应我如今正在调试的这款。
关于DeviceId从一開始看打印机相关的东西的时候最先接触到的就是这个DeviceId,能够说我对它的感情也是跌宕起伏。从一喜得DeviceId。到认为其作用单一。到如今的强大无比。
以下说点正经的，在《互联网打印协议-rfc2911》的printer-state-reasons章节规定了打印机异常状态码。也就是说除了使用HP自己定义的LEDM获取的状态外，相同还能够通过标准的IPP协议得到状态值。由此也能延伸出一个问题，CUPS应该也能够获取打印机状态了。可是却没有做不论什么显示。至于是为什么。这个还是比較玄乎。
详细来看DeviceID中含有状态的“S”字段:S:038000C484a01021002c1f01100c2881100;首先说明的是这个当中的都是16进制的数。前两位是版本号信息，依据版本号信息不同。状态码所在的位置也不同，比方这里的版本号号为03，那么状态码在第16位的两位数这里为00转换为10进制也是0。这个状态代表空暇。有时候代码比语言更有说服力。
java版本号:
public int getPrinterStatusCode() {
String deviceId = getPrinterDeivceId();
int ippStatus = -1;
int pSf = 2;
if(deviceId == null)
return ippStatus;
// somthing
String str[] = deviceId.split(";S:");
if(str.length > 1)
{
if(str[1] != null)
{
int ver=Integer.parseInt(str[1].substring(0,2), 16);
/* Position pointer to printer state subfield. */
switch (ver)
{
case 0:
case 1:
case 2:
pSf+=12;
break;
case 3:
pSf+=14;
break;
case 4:
pSf+=18;
break;
default:
Slog.w(LOG_TAG, "WARNING: unknown S-field version=" + ver + "\n");
pSf+=12;
break;
}
ippStatus = Integer.parseInt(str[1].substring(pSf, pSf + 2), 16);
}
}
return ippStatus;
}C版本号：
static int get_printer_status_code(const char* device_id)
{
const char* id = device_id;
char *pSf;
int ver;
int status = 0;
/* Check for valid S-field in device id string. */
if ((pSf = strstr(id, ";S:")) == NULL)
{
/* No S-field, use status register instead of device id. */
/* do nothing */
goto bugout;
}
else
{
/* Valid S-field, get version number. */
pSf+=3;
ver = 0;
HEX2INT(*pSf, ver);
pSf++;
ver = ver << 4;
HEX2INT(*pSf, ver);
pSf++;
/* Position pointer to printer state subfield. */
switch (ver)
{
case 0:
case 1:
case 2:
pSf+=12;
break;
case 3:
pSf+=14;
break;
case 4:
pSf+=18;
break;
default:
printf("WARNING: unknown S-field version=%d\n", ver);
pSf+=12;
break;
}
/* Extract VStatus.*/
status = 0;
HEX2INT(*pSf, status);
pSf++;
status = status << 4;
HEX2INT(*pSf, status);
}
printf("status:%d\n", status);
bugout:
return status;
}状态码相应关系：
VSTATUS_IDLE = 0, VSTATUS_BUSY = 1, VSTATUS_PRNT = 2, /* io printing */ VSTATUS_OFFF = 3, /* turning off */ VSTATUS_RPRT = 4, /* report printing */ VSTATUS_CNCL = 5, /* canceling */ VSTATUS_IOST = 6, /* io stall */ VSTATUS_DRYW = 7, /* dry time wait */ VSTATUS_PENC = 8, /* pen change */ VSTATUS_OOPA = 9, /* out of paper */ VSTATUS_BNEJ = 10, /* banner eject needed */ VSTATUS_BNMZ = 11, /* banner mismatch */ VSTATUS_PHMZ = 12, /* photo mismatch */ VSTATUS_DPMZ = 13, /* duplex mismatch */ VSTATUS_PAJM = 14, /* media jam */ VSTATUS_CARS = 15, /* carriage stall */ VSTATUS_PAPS = 16, /* paper stall */ VSTATUS_PENF = 17, /* pen failure */ VSTATUS_ERRO = 18, /* hard error */ VSTATUS_PWDN = 19, /* power down */ VSTATUS_FPTS = 20, /* front panel test */ VSTATUS_CLNO = 21 /* clean out tray missing */
文章至此该结束了。
其他：
Linux打印驱动知识点
1.关于DeviceId各段意义见《ieee_1284》
2.关于LEDM见《DISCOVERING PC-CONNECTED DEVICES》
3.Syslog见《syslog-example》经过实践输出到了/var/log/syslog.
4.关于Eclipse CD高版本号的Memory View不能显示相应的Text.换成Helios Service Release 2使用New Rendrings->Traditional.
5.关于PJL(打印机控制语言)《Printer Job Language Technical Reference Manual》
6.终于选择了基于deviceId的方法来实现。所以临时不再用hpmud的方法了。可是已经代码已经实现了printDate和基于ledm获取打印机的状态信息。
#include <stdio.h>
#include <string.h>
#include <hpmud.h>
#include <malloc.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdarg.h>
//#define DEBUG
#ifdef DEBUG
#define debug(fmt,args...) printf (fmt ,##args)
#define debugX(level,fmt,args...) if (DEBUG>=level) debug(fmt,##args);
#else
#define debug(fmt,args...)
#define debugX(level,fmt,args...)
#endif /* DEBUG */
// hp printer device
static HPMUD_DEVICE hd;
#define MALLOC(type, n) (type*)malloc(n*sizeof(type))
// HPMUD_I_MAX
#define HPMUD_I_MAX 18
static int channels[HPMUD_I_MAX] = {0};
typedef HPMUD_CHANNEL(open_channel)(void);
typedef int(read_func)(int bytes_requested, char* reply, int timeout);
enum BACKEND_RESULT
{
BACKEND_OK = 0,
BACKEND_FAILED = 1, /* use error-policy */
BACKEND_HOLD = 3, /* hold job */
BACKEND_STOP = 4, /* stop queue */
BACKEND_CANCEL = 5 /* cancel job */
};
struct pjl_attributes
{
int pjl_device; /* 0=disabled, 1=enabled */
int current_status;
int eoj_pages; /* end-of-job pages */
int abort; /* 0=no, 1=yes */
int done; /* 0=no, 1=yes */
HPMUD_DEVICE dd;
HPMUD_CHANNEL cd;
pthread_t tid;
pthread_mutex_t mutex;
pthread_cond_t done_cond;
};
#define _STRINGIZE(x) #x
#define STRINGIZE(x) _STRINGIZE(x)
#define BUG(args...) bug(__FILE__ " " STRINGIZE(__LINE__) ": " args)
#ifdef HP_DEBUG
#define DBG(args...) syslog(LOG_INFO, __FILE__ " " STRINGIZE(__LINE__) ": " args)
#define DBG_DUMP(data, size) sysdump((data), (size))
#define DBG_SZ(args...) syslog(LOG_INFO, args)
#else
#define DBG(args...)
#define DBG_DUMP(data, size)
#define DBG_SZ(args...)
#endif
#define RETRY_TIMEOUT 30 /* seconds */
#define EXCEPTION_TIMEOUT 45 /* seconds */
#define NFAULT_BIT 0x08
#define PERROR_BIT 0x20
#define OOP (NFAULT_BIT | PERROR_BIT)
#define JAMMED (PERROR_BIT)
#define ERROR_TRAP (0)
#define STATUS_MASK (NFAULT_BIT | PERROR_BIT)
#define DEVICE_IS_OOP(reg) ((reg & STATUS_MASK) == OOP)
#define DEVICE_PAPER_JAMMED(reg) ((reg & STATUS_MASK) == JAMMED)
#define DEVICE_IO_TRAP(reg) ((reg & STATUS_MASK) == ERROR_TRAP)
#define HEX2INT(x, i) if (x >= \'0\' && x <= \'9\') i |= x - \'0\'; \
else if (x >= \'A\' && x <= \'F\') i |= 0xA + x - \'A\'; \
else if (x >= \'a\' && x <= \'f\') i |= 0xA + x - \'a\'
/* Definitions for hpLogLevel in cupsd.conf. */
#define BASIC_LOG 1
#define SAVE_PCL_FILE 2
#define SAVE_INPUT_RASTERS 4
#define SEND_TO_PRINTER_ALSO 8
/* Actual vstatus codes are mapped to 1000+vstatus for DeviceError messages. */
typedef enum
{
VSTATUS_IDLE = 1000,
VSTATUS_BUSY,
VSTATUS_PRNT, /* io printing */
VSTATUS_OFFF, /* turning off */
VSTATUS_RPRT, /* report printing */
VSTATUS_CNCL, /* canceling */
VSTATUS_IOST, /* io stall */
VSTATUS_DRYW, /* dry time wait */
VSTATUS_PENC, /* pen change */
VSTATUS_OOPA, /* out of paper */
VSTATUS_BNEJ, /* banner eject needed */
VSTATUS_BNMZ, /* banner mismatch */
VSTATUS_PHMZ, /* photo mismatch */
VSTATUS_DPMZ, /* duplex mismatch */
VSTATUS_PAJM, /* media jam */
VSTATUS_CARS, /* carriage stall */
VSTATUS_PAPS, /* paper stall */
VSTATUS_PENF, /* pen failure */
VSTATUS_ERRO, /* hard error */
VSTATUS_PWDN, /* power down */
VSTATUS_FPTS, /* front panel test */
VSTATUS_CLNO /* clean out tray missing */
} VSTATUS;
#define EVENT_START_JOB 500
#define EVENT_END_JOB 501
//const char pjl_status_cmd[] = "\e%-12345X@PJL INFO STATUS \r\n\e%-12345X";
static const char pjl_ustatus_cmd[] = "\e%-12345X@PJL USTATUS DEVICE = ON \r\n@PJL USTATUS JOB = ON \r\n@PJL JOB \r\n\e%-12345X";
static const char pjl_job_end_cmd[] = "\e%-12345X@PJL EOJ \r\n\e%-12345X";
static const char pjl_ustatus_off_cmd[] = "\e%-12345X@PJL USTATUSOFF \r\n\e%-12345X";
static int bug(const char *fmt, ...)
{
char buf[256];
va_list args;
int n;
va_start(args, fmt);
if ((n = vsnprintf(buf, 256, fmt, args)) == -1)
buf[255] = 0; /* output was truncated */
fprintf(stderr, "%s", buf);
//syslog(LOG_ERR, "%s", buf);
fflush(stderr);
va_end(args);
return n;
}
/**
* 因为使用的数组来实现python中的字典
* 所以要将字符串转化为相应数字
* openChannle和closeChannel中会用到
*/
static int get_service_name_num(char* service_name)
{
int ser_name_id = 0;
if(!strncmp(HPMUD_S_PRINT_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 1;
else if(!strncmp(HPMUD_S_PML_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 2;
else if(!strncmp(HPMUD_S_SCAN_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 3;
else if(!strncmp(HPMUD_S_FAX_SEND_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 4;
else if(!strncmp(HPMUD_S_CONFIG_UPLOAD_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 5;
else if(!strncmp(HPMUD_S_CONFIG_DOWNLOAD_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 6;
else if(!strncmp(HPMUD_S_MEMORY_CARD_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 7;
else if(!strncmp(HPMUD_S_EWS_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 8;
else if(!strncmp(HPMUD_S_EWS_LEDM_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 9;
else if(!strncmp(HPMUD_S_SOAP_SCAN, service_name, strlen(service_name)))
ser_name_id = 10;
else if(!strncmp(HPMUD_S_SOAP_FAX, service_name, strlen(service_name)))
ser_name_id = 11;
else if(!strncmp(HPMUD_S_DEVMGMT_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 12;
else if(!strncmp(HPMUD_S_MARVELL_SCAN_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 13;
else if(!strncmp(HPMUD_S_MARVELL_FAX_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 14;
else if(!strncmp(HPMUD_S_LEDM_SCAN, service_name, strlen(service_name)))
ser_name_id = 15;
else if(!strncmp(HPMUD_S_WIFI_CHANNEL, service_name, strlen(service_name)))
ser_name_id = 16;
else
ser_name_id = 0;
return ser_name_id;
}
static int __closeChannel(char* service_name)
{
int result_code = 0;
int ser_name_id = get_service_name_num(service_name);
//if not self.mq[\'io-mode\'] == IO_MODE_UNI and
// if self.io_state == IO_STATE_HP_OPEN:
// service_name = service_name.upper();
if(channels[ser_name_id] != 0)
{
printf("Closing %s channel...\n", service_name);
result_code = hpmud_close_channel(hd, channels[ser_name_id]);
if (result_code != HPMUD_R_OK)
{
fprintf(stderr, "error hpmud_close_channel (code=%d)\n", result_code);
return 1;
}
else
{
channels[ser_name_id] = 0;
}
}
return 0;
}
/*
* open channel
*/
static int __openChannel(char* service_name)
{
int result_code = 0;
int channel_id = 0;
HPMUD_CHANNEL ret = 0;
int ser_name_id = get_service_name_num(service_name);
if (channels[ser_name_id] == 0)
{
printf("Opening %s channel...\n", service_name);
result_code = hpmud_open_channel(hd, service_name, &channel_id);
if (result_code != HPMUD_R_OK)
{
fprintf(stderr, "error opening channel (code=%d)\n", result_code);
exit(1);
}
else
{
channels[ser_name_id] = channel_id;
debug("channel-id=%d\n", channel_id);
ret = channel_id;
}
}
else
{
printf("already open!\n");
ret = channels[ser_name_id];
}
return ret;
}
/*
* read channel
*/
static int __readChannel(open_channel opener, int bytes_to_read, char* reply, int allow_short_read, int timeout)
{
bytes_to_read = 1024;
char data[1024] = {0};
int ret = 0;
int num_bytes = 0;
int len = 0;
char *p = reply;
HPMUD_CHANNEL channel_id = opener();
while (1)
{
ret = hpmud_read_channel(hd, channel_id, data, 1024, timeout, &num_bytes);
debug("Result code=%d\n", ret);
len = strlen(data);
if(ret == HPMUD_R_IO_TIMEOUT)
{
debug("I/O timeout\n");
break;
}
if(ret != HPMUD_R_OK)
{
debug("Channel read error\n");
break;
}
//debug("read_buf:%s\n", data);
if(!len)
{
debug("End of data\n");
break;
}
memcpy(p, data, len);
if (num_bytes == bytes_to_read)
{
debug("Full read complete.\n");
break;
}
if (allow_short_read && (num_bytes < bytes_to_read))
{
debug("Allowed short read of %d of %d bytes complete.\n", num_bytes, bytes_to_read);
break;
}
}
debug("Saved %d total bytes to stream.\n", num_bytes);
return num_bytes;
}
/**
* write channel
*/
static int __writeChannel(open_channel opener, const char* data, int total_bytes_to_write)
{
HPMUD_DEVICE device_id = hd;
HPMUD_CHANNEL channel_id = opener();
int result_code = 0;
int bytes_written = 0;
const char* buffer = data;
int bytes_out = 0;
int max_message_len = 16384;
int timeout = 45;
int bytes_to_write = total_bytes_to_write;
while(bytes_to_write > 0)
{
result_code = hpmud_write_channel(device_id, channel_id, buffer, bytes_to_write < max_message_len ? bytes_to_write : max_message_len, timeout, &bytes_written);
printf("Result code=%d\n", result_code);
if (result_code != HPMUD_R_OK)
{
fprintf(stderr, "Channel write error\n");
return -1;
}
buffer += max_message_len;
bytes_out += bytes_written;
bytes_to_write -= bytes_written;
}
if (total_bytes_to_write != bytes_out)
{
printf("total_bytes_to_write =%d =\\= bytes_out=%d\n", total_bytes_to_write, bytes_out);
return -1;
}
//printf("%s end\n", __func__);
return bytes_out;
}
static HPMUD_CHANNEL openEWS_LEDM()
{
return __openChannel(HPMUD_S_EWS_LEDM_CHANNEL);
}
static HPMUD_CHANNEL openPrint()
{
return __openChannel(HPMUD_S_PRINT_CHANNEL);
}
static int closePrint(void)
{
return __closeChannel(HPMUD_S_PRINT_CHANNEL);
}
static int closeEWS_LEDM(void)
{
return __closeChannel(HPMUD_S_EWS_LEDM_CHANNEL);
}
static int readEWS_LEDM(int bytes_requested, char* reply, int timeout)
{
open_channel* opener = openEWS_LEDM;
return __readChannel(opener, bytes_requested, reply, 1, timeout);
}
static int writePrint(const char* data, int len)
{
open_channel* opener = openPrint;
int ret = EXIT_FAILURE;
int result_code = 0;
//TODO:delect hpmud_write_channel
/* Enable unsolicited status. */
//ret = hpmud_write_channel(hd, channel_id, pjl_ustatus_cmd, sizeof(pjl_ustatus_cmd)-1, 5, &bytes_written);
result_code = __writeChannel(opener, data, len);
if(result_code != len)
{
printf("ret != len(%s:%u,%s)\n", __FILE__, __LINE__, __func__);
goto bugout;
}
/* Look for job end status. */
//ret = hpmud_write_channel(hd, channel_id, pjl_ustatus_off_cmd, sizeof(pjl_ustatus_off_cmd)-1, 5, &bytes_written);
result_code = __writeChannel(opener, pjl_job_end_cmd, sizeof(pjl_job_end_cmd)-1);
if(result_code != (sizeof(pjl_job_end_cmd)-1))
{
printf("ret != len(%s:%u,%s)\n", __FILE__, __LINE__, __func__);
goto bugout;
}
ret = EXIT_SUCCESS;
bugout:
return ret;
}
static int writeEWS_LEDM(const char* data, int len)
{
open_channel* opener = openEWS_LEDM;
return __writeChannel(opener, data, len);
}
static void readLEDMData(read_func* func, char *reply)
{
int timeout = 6;
const char* END_OF_DATA="0\r\n\r\n";
int bytes_read = 0;
int bytes_requested = 1024;
char temp_buf[1024] = {0}; //大小要一致
int chunkedFlag = 1;
char *offset = reply;
if(reply == NULL)
{
fprintf(stderr, "MALLC FAILURE!\n");
return;
}
bytes_read = func(bytes_requested, reply, timeout);
offset += bytes_read;
//debug("%s:%s\n", __func__, reply);
// 默认chunked分块.
chunkedFlag = 1;
//result = strtok(reply, "\n");
//debug("result=%s\n", result);
while (bytes_read > 0)
{
bytes_read = readEWS_LEDM(bytes_requested, (char*)temp_buf, timeout);
//reply.write(temp_buf.getvalue());
memcpy(offset, temp_buf, bytes_read);
debug("%s:%s\n", __func__, offset);
offset += bytes_read;
if(!chunkedFlag) // Unchunked data
{
// do nothing!
}
else // Chunked data end
{
//END_OF_DATA == temp_buf.getvalue();
if(!strncmp(temp_buf, END_OF_DATA, sizeof(END_OF_DATA)))
break;
}
}
printf("%s:%s\n", __func__, reply);
}
static int open_hp(const char* url, char* reply)
{
char data[512] = {0};
debug("open_hp(%s)\n", url);
// match_obj = http_pat_url.search(url)
// loc = url.split("=")[url.count("=")]
openEWS_LEDM();
sprintf(data, "GET %s HTTP/1.1\r\nAccept: text/plain\r\nHost:localhost\r\nUser-Agent:hplip\r\n\r\n", url);
writeEWS_LEDM(data, strlen(data));
//while dev.readEWS_LEDM(512, reply, timeout=3):
//pass
read_func* func = readEWS_LEDM;
readLEDMData(func, reply);
//reply.seek(0);
//return reply.getvalue();
return 0;
}
void getEWSUrl_LEDM(const char* url, char* reply)
{
// int self, url, stream, footer;
// url2 = "%s&loc=%s" % (self.device_uri.replace(\'hpfax:\', \'hp:\'), url);
// data = self;
// opener = LocalOpenerEWS_LEDM({});
// opener.open_hp(url2, data);
open_hp(url, reply);
closeEWS_LEDM();
}
void printData()
{
char *buf = (char*)MALLOC(unsigned char, 107968);
if(buf == NULL)
{
fprintf(stderr, "MALLC FAILURE!\n");
return;
}
int fd = open("/home/kangear/bin.bin", O_RDONLY);
if(fd == -1)
{
fprintf(stderr, "open file error!\n");
return;
}
int num = read(fd, buf, 107968);
if(num == -1)
{
fprintf(stderr, "read file error!\n");
return;
}
writePrint(buf, num);
close(fd);
free(buf);
buf = NULL;
}
/**
* device discovery
* if there is hp device return EXIT_SUCCESS, but EXIT_FAILURE.
*/
static int device_discovery()
{
char buf[HPMUD_LINE_SIZE*64];
int cnt=0, bytes_read, r=EXIT_FAILURE;
enum HPMUD_RESULT stat;
stat = hpmud_probe_devices(HPMUD_BUS_ALL, buf, sizeof(buf), &cnt, &bytes_read);
if (stat != HPMUD_R_OK)
goto bugout;
if (cnt == 0)
{
#ifdef HAVE_CUPS11
fprintf(stdout, "direct hp:/no_device_found \"Unknown\" \"hp no_device_found\"\n");
#else
fprintf(stdout, "direct hp \"Unknown\" \"HP Printer (HPLIP)\"\n");
#endif
goto bugout;
}
else
fprintf(stdout, "%s", buf);
r = EXIT_SUCCESS;
bugout:
return r;
}
static int open_device(const char* device_uri)
{
//int io_mode = 0;
HPMUD_DEVICE device_id = -1;
int result_code = 0, r = EXIT_FAILURE;
enum HPMUD_IO_MODE io_mode = HPMUD_RAW_MODE;
debug("I/O mode=%d\n", io_mode);
// 打开设备获得
result_code = hpmud_open_device(device_uri, io_mode, &device_id);
if (result_code != HPMUD_R_OK)
{
fprintf(stderr, "error opening device (code=%d)\n", result_code);
goto bugout;
}
hd = device_id; //TODO:delect.
r = EXIT_SUCCESS;
bugout:
return r;
}
/* Map printer status to IPP printer-state-reasons (see RFC-2911). */
static int map_ipp_printer_state_reason(int status, const char **state_msg)
{
if (status >= 1000 && status <= 1999)
{
/* inkjet vstatus */
switch (status)
{
case VSTATUS_IDLE:
case VSTATUS_PRNT:
*state_msg = "none";
break;
case VSTATUS_OOPA:
*state_msg = "media-empty-error";
break;
case(VSTATUS_PAJM):
*state_msg = "media-jam-error";
break;
default:
*state_msg = "other";
break;
}
}
else if (status >= 10000 && status <= 55999)
{
/* laserjet pjl status */
if (status >= 10000 && status <= 10999)
*state_msg = "none";
else if (status >= 41000 && status <= 41999)
*state_msg = "media-empty-error";
else if ((status >= 42000 && status <= 42999) || (status >= 44000 && status <= 44999) || (status == 40022))
*state_msg = "media-jam-error";
else if (status == 40021)
*state_msg = "cover-open-error";
else if (status == 40600)
*state_msg = "toner-empty-error";
else
*state_msg = "other"; /* 40017 - cartridge E-LABEL is unreadable (ie: ljp1005) */
}
else
{
/* Assume hpmud error */
*state_msg = "other";
}
return 0;
}
/*
* get_printer_status
*
* inputs:
* dd - device descriptor
* pa - see pjl_attributes definition
*
* outputs:
* return - printer status, 1000 to 1999 = inkjet vstatus, 5000 to 5999 = hpmud error, 10000 to 55999 = pjl status code
*
*/
static int get_printer_status(HPMUD_DEVICE dd, HPMUD_CHANNEL cd, struct pjl_attributes *pa)
{
char id[1024];
char *pSf;
int status, ver, len;
enum HPMUD_RESULT r;
if (pa->pjl_device)
{
pthread_mutex_lock(&pa->mutex);
status = pa->current_status;
pthread_mutex_unlock(&pa->mutex);
}
else
{
status = VSTATUS_IDLE; /* set default */
r = hpmud_get_device_id(dd, id, sizeof(id), &len);
// if (!(r == HPMUD_R_OK || r == HPMUD_R_DEVICE_BUSY))
if (r != HPMUD_R_OK)
{
status = 5000+r; /* no deviceid, return some error */
goto bugout;
}
/* Check for valid S-field in device id string. */
if ((pSf = strstr(id, ";S:")) == NULL)
{
/* No S-field, use status register instead of device id. */
unsigned int bit_status;
r = hpmud_get_device_status(dd, &bit_status);
// if (!(r == HPMUD_R_OK || r == HPMUD_R_DEVICE_BUSY))
if (r != HPMUD_R_OK)
{
status = 5000+r; /* no 8-bit status, return some error */
goto bugout;
}
if (DEVICE_IS_OOP(bit_status))
status = VSTATUS_OOPA;
else if (DEVICE_PAPER_JAMMED(bit_status))
status = VSTATUS_PAJM;
else if (DEVICE_IO_TRAP(bit_status))
status = VSTATUS_CARS;
}
else
{
/* Valid S-field, get version number. */
pSf+=3;
ver = 0;
HEX2INT(*pSf, ver);
pSf++;
ver = ver << 4;
HEX2INT(*pSf, ver);
pSf++;
/* Position pointer to printer state subfield. */
switch (ver)
{
case 0:
case 1:
case 2:
pSf+=12;
break;
case 3:
pSf+=14;
break;
case 4:
pSf+=18;
break;
default:
BUG("WARNING: unknown S-field version=%d\n", ver);
pSf+=12;
break;
}
/* Extract VStatus.*/
status = 0;
HEX2INT(*pSf, status);
pSf++;
status = status << 4;
HEX2INT(*pSf, status);
status += 1000;
}
}
bugout:
return status;
}
/* Check printer status, if a valid error state, loop until error condition is cleared. */
static int loop_test(HPMUD_DEVICE dd, HPMUD_CHANNEL cd, struct pjl_attributes *pa,
const char *dev, const char *printer, const char *username, const char *jobid, const char *title)
{
int status, stat;
const char *pstate, *old_state=NULL;
while (1)
{
status = get_printer_status(dd, cd, pa);
map_ipp_printer_state_reason(status, &pstate);
/* Check for user intervention errors. */
if (strstr(pstate, "error"))
{
if (pstate != old_state)
{
if (old_state)
{
/* Clear old error. */
// device_event(dev, printer, status, username, jobid, title);
fprintf(stderr, "STATE: -%s\n", old_state);
}
/* Display error. */
//device_event(dev, printer, status, username, jobid, title);
fprintf(stderr, "STATE: +%s\n", pstate);
old_state = pstate;
}
BUG("ERROR: %d %s; will retry in %d seconds...\n", status, pstate, RETRY_TIMEOUT);
sleep(RETRY_TIMEOUT);
continue;
}
/* Clear any old state. */
if (old_state)
fprintf(stderr, "STATE: -%s\n", old_state);
/* Check for system errors. */
if (status >= 5000 && status <= 5999)
{
/* Display error. */
//device_event(dev, printer, status, username, jobid, title);
BUG("ERROR: %d device communication error!\n", status);
stat = 1;
}
else
stat = 0;
break; /* done */
}
return stat;
}
int get_device_id(HPMUD_DEVICE hd)
{
char id[1024] = {0};
char *pSf;
int status, ver, len;
enum HPMUD_RESULT r;
int ret = EXIT_FAILURE;
r = hpmud_get_device_id(hd, id,sizeof(id), &len);
printf("device_id:%s\n", id);
if (r != HPMUD_R_OK)
{
/* no deviceid, return some error */
goto bugout;
}
/* Check for valid S-field in device id string. */
if ((pSf = strstr(id, ";S:")) == NULL)
{
/* No S-field, use status register instead of device id. */
unsigned int bit_status;
r = hpmud_get_device_status(hd, &bit_status);
// if (!(r == HPMUD_R_OK || r == HPMUD_R_DEVICE_BUSY))
if (r != HPMUD_R_OK)
{
status = 5000+r; /* no 8-bit status, return some error */
goto bugout;
}
// if (DEVICE_IS_OOP(bit_status))
// status = VSTATUS_OOPA;
// else if (DEVICE_PAPER_JAMMED(bit_status))
// status = VSTATUS_PAJM;
// else if (DEVICE_IO_TRAP(bit_status))
// status = VSTATUS_CARS;
}
else
{
/* Valid S-field, get version number. */
pSf+=3;
ver = 0;
HEX2INT(*pSf, ver);
pSf++;
ver = ver << 4;
HEX2INT(*pSf, ver);
pSf++;
/* Position pointer to printer state subfield. */
switch (ver)
{
case 0:
case 1:
case 2:
pSf+=12;
break;
case 3:
pSf+=14;
break;
case 4:
pSf+=18;
break;
default:
printf("WARNING: unknown S-field version=%d\n", ver);
pSf+=12;
break;
}
/* Extract VStatus.*/
status = 0;
HEX2INT(*pSf, status);
pSf++;
status = status << 4;
HEX2INT(*pSf, status);
status += 1000;
}
printf("status:%d\n", status);
ret = EXIT_SUCCESS;
bugout:
return ret;
}
static int get_printer_status_code(const char* device_id)
{
const char* id = device_id;
char *pSf;
int ver;
int status = 0;
/* Check for valid S-field in device id string. */
if ((pSf = strstr(id, ";S:")) == NULL)
{
/* No S-field, use status register instead of device id. */
/* do nothing */
goto bugout;
}
else
{
/* Valid S-field, get version number. */
pSf+=3;
ver = 0;
HEX2INT(*pSf, ver);
pSf++;
ver = ver << 4;
HEX2INT(*pSf, ver);
pSf++;
/* Position pointer to printer state subfield. */
switch (ver)
{
case 0:
case 1:
case 2:
pSf+=12;
break;
case 3:
pSf+=14;
break;
case 4:
pSf+=18;
break;
default:
printf("WARNING: unknown S-field version=%d\n", ver);
pSf+=12;
break;
}
/* Extract VStatus.*/
status = 0;
HEX2INT(*pSf, status);
pSf++;
status = status << 4;
HEX2INT(*pSf, status);
status += 1000;
}
printf("status:%d\n", status);
bugout:
return status;
}
static int get_cups_uri(char* cups_uri)
{
char buf[HPMUD_LINE_SIZE*64];
int cnt=0, bytes_read, r=EXIT_FAILURE;
enum HPMUD_RESULT stat;
stat = hpmud_probe_devices(HPMUD_BUS_ALL, buf, sizeof(buf), &cnt, &bytes_read);
if (stat != HPMUD_R_OK)
goto bugout;
if (cnt == 0)
fprintf(stdout, "direct hp \"Unknown\" \"HP Printer (HPLIP)\"\n");
else
sprintf(cups_uri, buf, strlen(buf));
r = EXIT_SUCCESS;
bugout:
return r;
}
static int make_device_uri(char* dev_uri)
{
int ret = EXIT_FAILURE;
enum HPMUD_RESULT stat;
char cups_uri[HPMUD_LINE_SIZE*64];
char* p = NULL;
stat = get_cups_uri(cups_uri);
if (stat != EXIT_SUCCESS)
goto bugout;
p = strtok(cups_uri, " ");
if(p == NULL)
goto bugout;
p = strtok(NULL, " ");
if(p == NULL)
goto bugout;
// copy only one device uri and others ignore.
sprintf(dev_uri, p, strlen(p));
debug("dev_uri:%s\n", dev_uri);
ret = EXIT_SUCCESS;
bugout:
return ret;
}
int main(void)
{
int ret = EXIT_FAILURE;
//const char *device_uri = "hp:/usb/Deskjet_1010_series?serial=CN39I18M1805S8";
//const char *device_uri = "hp:/usb/Deskjet_1000_J110_series?serial=CN2C818N3605YD";
char dev_uri[HPMUD_LINE_SIZE] = {0};
// step 1.
if(device_discovery() != EXIT_SUCCESS)
{
debug("device discovery failed!\n");
goto bugout;
}
printf("device discovery success!\n");
// step 2:解析一个device uri.
if(make_device_uri(dev_uri) != EXIT_SUCCESS)
{
debug("make device uri failed!\n");
goto bugout;
}
// step 3:open hp device
if(open_device(dev_uri) != EXIT_SUCCESS)
{
debug("open_device device failed!\n");
goto bugout;
}
// step 4: get device id.
get_device_id(hd);
//printData();
//readAttributeFromXml_EWS
//StatusType10();
char* reply = (char*)MALLOC(char, 500*1024);
//获取状态XML
getEWSUrl_LEDM("/DevMgmt/ProductStatusDyn.xml", reply); // 获取状态
//getEWSUrl_LEDM("/DevMgmt/ConsumableConfigDyn.xml", reply); // 获取耗材配置
free(reply);
reply = NULL;
if (hd >= 0)
hpmud_close_device(hd);
ret = EXIT_SUCCESS;
bugout:
return ret;
}打印机异常状态：
|
N |
Windows状态 |
宏 |
|
0 |
正常 |
STATUS_PRINTER_IDLE(1000) |
|
1 |
无法与打印机通信 |
x |
|
2 |
出纸盒已关闭 |
STATUS_PRINTER_OUTPUT_TRAY_CLOSED(1035) |
|
3 |
门己打开 |
STATUS_PRINTER_PEN_CHANGE(1008) |
|
4 |
缺纸 |
STATUS_PRINTER_OUT_OF_PAPER(1009) |
|
5 |
卡纸 |
STATUS_PRINTER_PAPER_STALL(1016) |
|
6 |
墨盒故障-黑色 |
STATUS_PRINTER_PEN_FAILURE(1017) |
|
7 |
墨盒故障-三色 |
- |
|
8 |
墨盒故障-黑色-三色 |
- |
|
9 |
墨盒丢失 |
- |
|
10 |
单墨盒模式-缺黑色 |
STATUS_PRINTER_IDLE(1000) |
|
11 |
单墨盒模式-缺彩色 |
STATUS_PRINTER_IDLE(1000) |
|
12 |
无墨 黑色 |
x |
|
13 |
无墨 彩色 |
x |
|
14 |
无墨 黑色-彩色 |
x |
|
15 |
已经安装HP保护墨盒 |
x |
|
16 |
检測到使用过的或仿制墨盒 |
x |
|
|
... |
|
|
注：x代表暂无条件获取, -代表和上条同样。 假设出现6号状态，建议提示提示语“墨盒故障或墨盒丢失”。 |
||
