WO2008141554A1 - Procédé de transport d'un message, système et dispositif de relais - Google Patents

Procédé de transport d'un message, système et dispositif de relais Download PDF

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Publication number
WO2008141554A1
WO2008141554A1 PCT/CN2008/070720 CN2008070720W WO2008141554A1 WO 2008141554 A1 WO2008141554 A1 WO 2008141554A1 CN 2008070720 W CN2008070720 W CN 2008070720W WO 2008141554 A1 WO2008141554 A1 WO 2008141554A1
Authority
WO
WIPO (PCT)
Prior art keywords
user
information
substitute
identification information
relay device
Prior art date
Application number
PCT/CN2008/070720
Other languages
English (en)
Chinese (zh)
Inventor
Yu Zheng
Zhiqiang Li
Shouwen Liu
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP08156326A priority Critical patent/EP1993268A3/fr
Priority to US12/122,459 priority patent/US20080285557A1/en
Publication of WO2008141554A1 publication Critical patent/WO2008141554A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services

Definitions

  • relay device Message transmission method and system, relay device
  • the present invention relates to the field of communications, and in particular, to a message transmission method and system, and a relay device.
  • some communication systems use the Proxy (proxy) and / or Snooping (monitoring) functions on the Relay (relay) devices (including the DHCP relay devices on L2 and L3).
  • the DHCP Dynamic Host Configuration Protocol
  • the relay device can obtain the information about the client, including the original user identification information that can identify the client, and send the request packet to the server.
  • the server carries the DHCP message in the response.
  • the original user identification information when receiving the DHCP message that the server answers, the relay device can find the user related information of the corresponding client according to the original user identification information carried in the server, so that the client can be determined according to the related information of the user. Location, and the data it has.
  • the DHCP protocol stipulates that the hardware type and hardware address can be used to identify the client.
  • the hardware type and hardware address are MAC addresses.
  • the chaddr field can be used to fill in the MAC address.
  • the chaddr field can be returned intact in the downlink DHCP packet.
  • the MAC address can also be filled in the Client-identifier field, and the Client-identifier field is not returned in the downlink DHCP message.
  • the user may also use the Transaction ID (XID) field in the DHCP message to identify the user.
  • XID Transaction ID
  • the XID field is randomly generated by each client and is still intact in the response message replied by the server. Return to the ground.
  • the inventors have found through research that: when there are multiple clients, the MAC address is likely to conflict; the XID generated by multiple clients is also likely to conflict; in addition, some terminals are considered.
  • the device After receiving the DHCP message from the server, the device cannot find the corresponding client based on the MAC address information and/or XID field carried in the server. Therefore, it cannot be known which client the DHCP message sent by the server should be sent to. The client cannot be obtained. The data that is owned.
  • Embodiments of the present invention provide a message transmission method and system, and a relay device, which are capable of being identified
  • the corresponding client can be found according to the received downlink packet.
  • An embodiment of the present invention provides a message transmission method, including:
  • the substitute user identification information can distinguish the user from other users;
  • An embodiment of the present invention further provides a relay device, where the relay device includes a configuration unit and a positioning unit:
  • the configuration unit is configured to obtain related information of the user according to the received uplink message carrying the substitute user identification information of the user and the location information of the received uplink message, and establish the substitute user identification information and the related information of the user. Corresponding relationship, and forwarding the uplink packet, where the user's substitute user identifier information can distinguish the user from other users;
  • a positioning unit configured to find user related information corresponding to the substitute user identification information by using the corresponding relationship in the configuration unit according to the substitute user identification information carried in the received downlink message, according to the user related information
  • the information is sent in the downlink.
  • An embodiment of the present invention further provides another relay device, including:
  • a transmission unit configured to carry the original usage of the user according to the uplink packet received by the relay device
  • the user identification information is sent with an uplink message carrying the substitute user identification information, where the substitute user identification information can distinguish the user from other users;
  • the processing unit is configured to send, according to the substitute user identification information carried in the downlink packet received by the relay device, a downlink “3” message carrying the original user identifier information.
  • An embodiment of the present invention further provides a communication system, including a first relay device, a second relay device, and a server;
  • the first relay device receives an uplink packet carrying the original user identifier information of the user, determines the substitute user identifier information of the user, and sends an uplink message to the second relay device, where the user
  • the user identifier can be distinguished from the other user by the user identifier information, and the uplink packet sent by the first relay device carries the substitute user identifier information of the user;
  • the second relay device receives the uplink packet from the first relay device, and obtains related information of the user according to the uplink packet received by the second relay device and the location information of the received uplink packet. Establishing a correspondence between the user-related information and the substitute user identifier information of the corresponding user, and sending an uplink packet carrying the substitute user identifier information to the service;
  • the second relay device receives the downlink packet from the server, and finds corresponding user-related information according to the substitute user identifier information in the downlink packet, and sends the corresponding information to the first relay device according to the user-related information. Send a downlink packet.
  • the embodiment of the present invention further provides another communication system, including a relay device and a server.
  • the relay device obtains related information of the user according to the received uplink message carrying the original user identification information of the user, and establishes a Determining a correspondence between the user-related information and the substitute user identifier information of the corresponding user, and sending the uplink packet to the server, where the substitute user identifier information of the user can distinguish the user from other users,
  • the sent uplink " ⁇ text carries the substitute user identification information of the user;
  • the relay device receives, by the server, an uplink packet from the relay device, and returning the substitute user identifier information in the downlink packet;
  • the relay device receives a downlink message from the server, finds corresponding user-related information according to the substitute user identification information, and sends a downlink message according to the found user-related information.
  • the specific implementation provided by the foregoing embodiment of the present invention can determine different alternative user identification information for different users, and send the substitute user identification information by using an uplink packet; carrying the replacement in the downlink >3 ⁇ 4 text User identification information; according to the substitute user identification information, find related information of the corresponding user. Therefore, in the case that the original user identification information of the client can be identified, the corresponding client can be found according to the received downlink packet.
  • Figure 1 is a flow chart of a first embodiment of the present invention
  • Figure 2 is a structural view of a second embodiment of the present invention.
  • Figure 3 is a structural view of a fourth embodiment of the present invention.
  • Fig. 4 is a structural view showing a fifth embodiment of the present invention.
  • a first embodiment of the present invention provides a packet transmission method, and an implementation process thereof is shown in FIG. 1 , including:
  • Step S101 Determine different alternative user identification information for different users, and send the substitute user identification information by using a standard field in the uplink packet, specifically:
  • the device with the Snooping and/or Proxy function After receiving the request packet sent by the client, the device with the Snooping and/or Proxy function records the original user identification information, such as XID1, carried in the packet, and determines an alternate user for the user according to its own needs. Identification information, such as XID11, which distinguishes the user from other users.
  • Step S102 Obtain relevant information of the user according to the uplink packet and the location information of the uplink packet, and establish a correspondence between the user-related information and the substitute user identifier information of the corresponding user, specifically:
  • a device with Snooping and/or Proxy functions according to the uplink packet and receiving the packet.
  • the location information obtains information about the user, such as the hardware type and hardware address used in the DHCP protocol, or user identification information that can be used to identify the user in other protocols, or port information, or VLAN (Virtual LAN, virtual The local area network (LAN), the IP address that the user applies for, and the like, may establish a correspondence between the substitute user identification information and the user-related information of the corresponding user.
  • Step S103 in the downlink packet, carrying the substitute user identifier information, specifically: the field in which the substitute user identifier information (such as the above XID11) is located is the same as the field in which the original user identifier information (such as the above XID1) is located.
  • the server does not need to modify any of the fields, and the XID11 is encapsulated into a response message and returned.
  • Step S104 Find the corresponding user-related information according to the substitute user identifier information carried in the downlink packet, and replace the substitute user identifier information carried in the downlink packet with the original user identifier information that was previously replaced, specifically:
  • the device with the Snooping and/or Proxy function After receiving the downlink response packet, the device with the Snooping and/or Proxy function distinguishes the client corresponding to the substitute user identification information according to the substitute user identification information carried in the packet (such as the above XID11), and finds the record.
  • the data item of the user information replaces the substitute user identification information (such as XID11 above) with the original user identification information (such as XID1 above), that is, the information of the user is determined by the information;
  • a downlink message carrying the original user identification information is transmitted to the user.
  • the embodiment of the present invention is not limited to the XID, and other information that can be used as the user identifier may also be used.
  • Embodiments applicable to the present invention such as hardware types and hardware addresses used in the DHCP protocol, or user identification information that can be used to identify users, or port information, or VLAN (Virtual LAN, Virtual Local Area Network) that can be used in other protocols. Etc., and this information can be used in any combination.
  • the embodiment of the invention is not limited to the alternative method, and the substitute user identifier information may be added to the packet through the reserved standard field in the DHCP packet.
  • the standard field can be returned by the downlink message intact.
  • the downlink message carrying the original user identification information is transmitted to the user according to the location of the user.
  • a second embodiment of the present invention provides a communication system, which is structured as shown in FIG. 2, and includes: a first relay device, a second relay device, and a server.
  • the first relay device includes: a first transmission unit and a first processing unit.
  • the second relay device includes: a positioning unit and a configuration unit.
  • the first relay device determines different substitute user identification information for different users; and transmits the substitute user identification information determined by the first relay device by using an uplink message.
  • the first transmission unit determines different alternate user identification information for different users; and replaces the original user identification information with the substitute user identification information in a field in which the original user identification information carried in the uplink>3 ⁇ 4 text is located,
  • the field in which the user identification information is located can be returned intact through the downlink message.
  • the configuration unit of the second relay device obtains the substitute user identification information according to the uplink packet forwarded by the first relay device, and obtains the user according to the uplink packet and the location information of the received uplink packet.
  • the related information is used to establish a correspondence between the user's substitute user identification information and the user-related information of the corresponding user, and forward the uplink packet to the server.
  • the server obtains the user identifier information of the user, and carries the substitute user identifier information in the downlink message that is fed back.
  • the server does not perform any modification on the substitute user identification information, and directly encapsulates the substitute user identification information into a downlink packet and returns.
  • the locating unit of the second relay device finds the corresponding relationship between the substitute user identification information carried in the downlink packet and the substitute user identifier information configured in the configuration unit and the user related information of the corresponding user.
  • the user-related information corresponding to the user identification information is replaced.
  • the second relay device transmits the downlink packet to the first relay device according to the user-related information, and specifically transmits the downlink packet to the first information according to the location information in the user-related information.
  • the first processing unit of the first relay device replaces the substitute user identifier information carried in the downlink packet with the original user identifier information that was previously replaced.
  • the first relay device has a proxy Proxy function and/or a monitoring Snooping function.
  • the specific processing of each unit is the same as that in the method embodiment, and will not be described in detail here.
  • a third embodiment of the present invention provides another communication system, the structure of which is still as shown in FIG. 2, including: a first relay device, a second relay device, and a server.
  • the first relay device includes: a second transmission unit and a second processing unit; the second relay device includes: a positioning unit and a configuration unit.
  • the first relay device determines different substitute user identification information for different users; and transmits the substitute user identification information determined by the first relay device by using an uplink message.
  • the second transmission unit of the first relay device determines different substitute user identification information for different users; adds the substitute user identification information to a standard field reserved in the uplink packet, and the standard field can The downlink message is returned as it is.
  • the configuration unit of the second relay device obtains the substitute user identification information according to the uplink packet forwarded by the first relay device, and obtains the user according to the uplink packet and the location information of the received uplink packet.
  • the related information is used to establish a correspondence between the user's substitute user identification information and the user-related information of the corresponding user, and forward the uplink packet to the server.
  • the server obtains the user identifier information of the user, and carries the substitute user identifier information in the downlink message that is fed back.
  • the server does not perform any modification on the substitute user identification information, and directly encapsulates the substitute user identification information into a downlink packet and returns.
  • the locating unit of the second relay device finds the corresponding relationship between the substitute user identification information carried in the downlink packet and the substitute user identifier information configured in the configuration unit and the user related information of the corresponding user.
  • the user-related information corresponding to the user identification information is replaced.
  • the second relay device transmits the downlink packet to the first relay device according to the user-related information, and specifically transmits the downlink packet to the first information according to the location information in the user-related information.
  • the second processing unit of the first relay device sends the substitute user identification letter carried in the downlink packet The information is deleted.
  • the first relay device has a proxy Proxy function and/or a monitoring Snooping function.
  • the specific processing of each unit is the same as that in the method embodiment, and will not be described in detail here.
  • the above alternative user identification information may be XID, hardware type and hardware address, port information, and the like.
  • the first relay device may not include the second processing unit, and the substitute user identifier information is still carried in the downlink packet sent to the client.
  • the first relay device and the second relay device are in a cascading situation, and the first relay device located in the lower layer replaces the original user identifier in the packet sent by each client below with a unique one.
  • the value that is, the replacement user ID
  • the second relay device of the upper layer uses the replacement user identifier to identify the user. If multiple lower-level devices are connected to the upper-layer device, such as L2 DHCP Relay 1 and L2 DHCP Relay 2 in Figure 2, a specific mechanism needs to be used on each lower-level device to ensure that the replacement user IDs generated by each lower-level device are different. the same.
  • the fourth embodiment of the present invention provides a third communication system, which is different from the second embodiment and the third embodiment of the present invention in that: the functions of the first relay device and the second relay device are collectively set.
  • the structure of the communication system is as shown in FIG. 3, and the specific processing situation is basically the same as that of the second embodiment of the present invention, and will not be described in detail herein.
  • a fifth embodiment of the present invention provides a relay device.
  • the structure thereof is as shown in FIG. 4, and includes: an identifier determining unit, a transmitting unit, and a positioning unit.
  • the transmission unit includes a first transmission subunit.
  • the relay device still further includes a first processing unit.
  • the relay device still further includes a configuration unit.
  • the identifier determining unit determines different alternative user identification information for different users
  • the transmitting unit transmits the substitute user identification information determined by the identifier determining unit through the uplink packet, and downlinks the downlink packet carrying the substitute user identifier information; the specific processing situation is as follows:
  • the first transmission sub-unit in the field where the original user identification information carried in the uplink packet is located, the original user identification information is replaced by the substitute user identification information, and the field in which the original user identification information is located can be downlinked Returning intact; and transmitting downlink packets carrying alternative user identification information.
  • the configuration unit obtains a phase of the user according to the uplink packet and the location information of receiving the uplink packet.
  • the information is related to the correspondence between the user-related information and the substitute user identification information of the corresponding user, and the uplink packet is forwarded to the server.
  • the locating unit obtains the substitute user identifier information returned by the downlink packet, and finds the user related information corresponding to the substitute user identifier information according to the substitute user identifier information carried in the downlink packet and the configuration information of the configuration unit.
  • the first processing unit is configured to replace the substitute user identification information carried in the downlink packet with the original user identifier information that was previously replaced.
  • the relay device has a proxy Proxy function and/or a monitoring Snooping function.
  • the above alternative user identification information may be XID, hardware type and hardware address, port information, and the like.
  • a sixth embodiment of the present invention provides another relay device, and the structure thereof includes: an identifier determining unit, a transmitting unit, and a positioning unit.
  • the transmission unit includes a second transmission subunit.
  • the relay device still further includes a second processing unit.
  • the relay device still further includes a configuration unit.
  • the identifier determining unit determines different alternative user identification information for different users
  • the transmitting unit transmits the substitute user identification information determined by the identifier determining unit through the uplink packet, and downlinks the downlink packet carrying the substitute user identifier information; the specific processing situation is as follows:
  • a second transmission subunit configured to add the substitute user identification information to a standard field reserved in the uplink >3 ⁇ 4 text, and the standard field can be returned by the downlink message intact; and the downlink transmission carries the substitute user identifier
  • the downside of the information is "3 ⁇ 4 text.
  • the configuration unit obtains the substitute user identification information and user related information corresponding to the substitute user identification information according to the uplink packet forwarded by the first relay device, and establishes the substitute user identification information of the user and the corresponding user. The correspondence between the user-related information and forwarding the uplink packet to the server.
  • the locating unit obtains the substitute user identifier information returned by the downlink packet, and finds the user-related information corresponding to the substitute user identifier information according to the substitute user identifier information carried in the downlink packet and the configuration information of the configuration unit.
  • the second processing unit deletes the substitute user identification information carried in the downlink packet.
  • the relay device has a proxy Proxy function and/or a monitoring Snooping function.
  • the above alternative user identification information may be an XID, a hardware type and a hardware address, port information, and the like.
  • the second processing unit may not be included, and the substitute user identification information is still carried in the downlink information sent to the client.
  • the relay device in the above embodiment may be a DHCP relay agent, or any device that passes between the DHCP client and the server, and both the DHCP uplink packet and the downlink packet pass.
  • the existing standard field in the uplink packet is sent to determine different alternative user identification information for different users, thereby having no impact on the processing of the DHCP server and the client. And performing the modification; and carrying the substitute user identifier information in the downlink packet, and the different user client can be distinguished by the replacement original user identifier, so that the problem that the original user identifier conflicts in each client request packet can be solved.
  • the spirit and scope of the Ming Thus, it is intended that the present invention cover the modifications and variations of the inventions

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transport d'un message, un système et un dispositif de relais consistant à : recevoir un message en liaison montante acheminant des informations d'identifiant du client initial; établir un rapport correspondant entre des informations liées au client et des informations remplacées d'identifiant du client en fonction du message en liaison montante acheminant les informations d'identifiant du client initial et transmettre le message en liaison montante acheminant les informations remplacées d'identifiant du client à un serveur, et les informations remplacées d'identifiant du client servent à distinguer le client des autres clients; recevoir un message en liaison descendante acheminant les informations remplacées d'identifiant du client depuis le serveur; trouver les informations liées au client correspondant aux informations remplacées d'identifiant du client en fonction du rapport correspondant, et transporter le message en liaison descendante en fonction des informations liées au client. Par conséquent, un client correspondant peut être trouvé en fonction du message en liaison descendante reçu lorsqu'un conflit se produit aux informations d'identifiant du client initial pour identifier un client.
PCT/CN2008/070720 2007-05-18 2008-04-16 Procédé de transport d'un message, système et dispositif de relais WO2008141554A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08156326A EP1993268A3 (fr) 2007-05-18 2008-05-16 Procédé, système et dispositif relais pour paquet de transmission
US12/122,459 US20080285557A1 (en) 2007-05-18 2008-05-16 Method, System and Relay Device for Transmitting Packet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710107096.1 2007-05-18
CN200710107096.1A CN101309202A (zh) 2007-05-18 2007-05-18 标识用户的方法及系统、中继设备

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WO2008141554A1 true WO2008141554A1 (fr) 2008-11-27

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WO (1) WO2008141554A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN102026200B (zh) * 2009-09-16 2014-01-01 中兴通讯股份有限公司 中继链路中用户的标识方法与装置
CN106953938A (zh) * 2017-03-29 2017-07-14 武汉米风通信技术有限公司 一种广电频谱超窄带物联网终端信息重发识别方法及装置
CN113114325B (zh) * 2021-03-19 2022-05-17 中国联合网络通信集团有限公司 一种通信方法及装置

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US7096273B1 (en) * 2001-04-25 2006-08-22 Cisco Technology, Inc. DHCP over mobile IP
JP2006262378A (ja) * 2005-03-18 2006-09-28 Fujitsu Ltd フレーム中継装置
CN1866904A (zh) * 2005-05-17 2006-11-22 华为技术有限公司 收敛二层mac地址的方法及设备
CN1885763A (zh) * 2006-07-06 2006-12-27 华为技术有限公司 一种防止ip地址泄露的方法

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Publication number Priority date Publication date Assignee Title
US7096273B1 (en) * 2001-04-25 2006-08-22 Cisco Technology, Inc. DHCP over mobile IP
JP2006262378A (ja) * 2005-03-18 2006-09-28 Fujitsu Ltd フレーム中継装置
CN1866904A (zh) * 2005-05-17 2006-11-22 华为技术有限公司 收敛二层mac地址的方法及设备
CN1885763A (zh) * 2006-07-06 2006-12-27 华为技术有限公司 一种防止ip地址泄露的方法

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