CN114205425A - Message transmission method, device, equipment and readable storage medium - Google Patents

Message transmission method, device, equipment and readable storage medium Download PDF

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Publication number
CN114205425A
CN114205425A CN202010908611.1A CN202010908611A CN114205425A CN 114205425 A CN114205425 A CN 114205425A CN 202010908611 A CN202010908611 A CN 202010908611A CN 114205425 A CN114205425 A CN 114205425A
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China
Prior art keywords
quic
message
connection
field
identification
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李志强
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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Priority to CN202010908611.1A priority Critical patent/CN114205425A/en
Publication of CN114205425A publication Critical patent/CN114205425A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/251—Translation of Internet protocol [IP] addresses between different IP versions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H04L69/164—Adaptation or special uses of UDP protocol
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/326—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the transport layer [OSI layer 4]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a message transmission method, a message transmission device, message transmission equipment and a readable storage medium, relates to the technical field of communication, and aims to solve the problem that a session source port is changed due to the fact that NAT mapping timeout aging and rebinding are carried out on a QUIC long connection session by NAT equipment. The method comprises the following steps: acquiring a first QUIC message from a QUIC client, wherein a connection identification field of the first QUIC message is used for identifying the connection of the QUIC; obtaining a second QUIC message according to the first QUIC message; sending a second QUIC message to a receiving end; and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field. The embodiment of the invention can avoid the condition that the NAT equipment carries out NAT mapping overtime aging and rebinding on the QUIC long connection session to cause the change of the session source port.

Description

Message transmission method, device, equipment and readable storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for transmitting a packet.
Background
The QUIC (Quick UDP Internet Connection, UDP-based low-latency Internet transport layer Protocol) Protocol uses UDP (User Datagram Protocol) as a transport layer. Many existing NAT (Network Address Translation) routers judge the establishment and termination of a connection by observing SYN (synchronization), ACK (acknowledgement) and FIN (end) messages in a TCP (Transmission Control Protocol) connection, and further accurately maintain the life cycle of an entry in an NAT mapping table.
Many NAT devices in existing networks do not support identification of the QUIC protocol, and therefore, the processing method in the prior art may cause the NAT device to perform NAT mapping timeout aging and rebinding on the QUIC long connection session, resulting in the problem of session source port change.
Disclosure of Invention
Embodiments of the present invention provide a message transmission method, apparatus, device, and readable storage medium, to solve the problem of session source port change caused by NAT mapping timeout aging and rebinding performed on a QUIC long connection session by a NAT device.
In a first aspect, an embodiment of the present invention provides a packet transmission method, applied to an NAT device, including:
acquiring a first QUIC message from a QUIC client, wherein a connection identification field of the first QUIC message is used for identifying QUIC connection;
obtaining a second QUIC message according to the first QUIC message;
sending the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
Wherein, the obtaining a second QUIC message according to the first QUIC message comprises:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
Wherein, said filling the destination identification of said QUIC connection in the option field of IPv4 header, obtaining said second QUIC message, including:
reading the coding value of the flag field flag of the first QUIC message;
determining a target identifier of the QUIC connection according to the coded value of the Flags field;
and filling the target identification of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message.
Wherein, the step of filling the destination identifier of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message comprises the following steps:
reading the coding value of the Flags field of the first QUIC message;
determining a target identifier of the QUIC connection according to the coded value of the Flags field;
and filling the target identification of the QUIC connection in an extension field of an IPv6 message header to obtain the second QUIC message.
Wherein, the determining the target identification of the QUIC connection according to the coding value of the Flags field comprises:
determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field;
and determining the target identification of the QUIC connection according to the information of the connection identification field of the first QUIC message.
Determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field, wherein the determining comprises the following steps:
if both Bit2 and Bit3 of the Flags field are 1, storing a QUIC connection identifier of 8 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message;
and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
Wherein, the determining the target identifier of the QUIC connection according to the information of the connection identifier field of the first QUIC message comprises the following steps:
if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 4 bytes, taking the QUIC connection identification with 4 bytes as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 1 byte, taking the QUIC connection identification with 1 byte as a low 8bit, and supplementing 0 with a high 24bit to obtain a target identification of the QUIC connection;
and if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
In a second aspect, an embodiment of the present invention further provides a packet transmission method, applied to a receiving end, including:
receiving a second QUIC message sent by NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and processing according to the second QUIC message.
Wherein, the second QUIC message is obtained by the following method:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
In a third aspect, an embodiment of the present invention provides a packet transmission apparatus, which is applied to an NAT device, and includes:
the system comprises a first acquisition module, a first communication module and a second acquisition module, wherein the first acquisition module is used for acquiring a first QUIC message from a QUIC client, and a connection identification field of the first QUIC message is used for identifying the connection of the QUIC;
the second acquisition module is used for acquiring a second QUIC message according to the first QUIC message;
the first sending module is used for sending the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
Wherein the second obtaining module comprises:
the first obtaining submodule is used for filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And the second obtaining submodule is used for filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
Wherein the first obtaining sub-module includes:
the first acquisition unit is used for reading the coded value of the flag field flag of the first QUIC message;
the determining unit is used for determining the target identification of the QUIC connection according to the coding value of the Flags field;
and the first filling unit is used for filling the target identifier of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message.
Wherein the second obtaining sub-module includes:
the second acquisition unit is used for reading the coding value of the Flags field of the first QUIC message;
the determining unit is used for determining the target identification of the QUIC connection according to the coding value of the Flags field;
and the second filling unit is used for filling the target identifier of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
Wherein the determination unit includes:
the first determining submodule is used for determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field;
and the second determining submodule is used for determining the target identifier of the QUIC connection according to the information of the connection identifier field of the first QUIC message.
Wherein the first determining submodule is configured to:
if both Bit2 and Bit3 of the Flags field are 1, storing a QUIC connection identifier of 8 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message;
and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
Wherein the second determining submodule is configured to:
if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 4 bytes, taking the QUIC connection identification with 4 bytes as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 1 byte, taking the QUIC connection identification with 1 byte as a low 8bit, and supplementing 0 with a high 24bit to obtain a target identification of the QUIC connection;
and if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
In a fourth aspect, an embodiment of the present invention provides a packet transmission apparatus, which is applied to a receiving end, and includes:
the first receiving module is used for receiving a second QUIC message sent by the NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and the first processing module is used for processing according to the second QUIC message.
Wherein, the second QUIC message is obtained by the following method:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
In a fifth aspect, an embodiment of the present invention provides a packet transmission apparatus, which is applied to a NAT device, and includes: a processor and a transceiver;
the transceiver is used for acquiring a first QUIC message from a QUIC client, and the connection identification field of the first QUIC message is used for identifying the connection of the QUIC;
the processor is used for obtaining a second QUIC message according to the first QUIC message;
the transceiver is used for sending the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
The processor is used for filling a target identifier of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message; or filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
The processor is used for reading the coded value of a flag field flag of the first QUIC message; determining a target identifier of the QUIC connection according to the coded value of the Flags field; and filling the target identification of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message.
The processor is used for reading the coding value of the Flags field of the first QUIC message; determining a target identifier of the QUIC connection according to the coded value of the Flags field; and filling the target identification of the QUIC connection in an extension field of an IPv6 message header to obtain the second QUIC message.
The processor is used for determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field; and determining the target identification of the QUIC connection according to the information of the connection identification field of the first QUIC message.
Wherein the processor is configured to:
if both Bit2 and Bit3 of the Flags field are 1, storing a QUIC connection identifier of 8 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message;
and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
Wherein the processor is configured to:
if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 4 bytes, taking the QUIC connection identification with 4 bytes as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 1 byte, taking the QUIC connection identification with 1 byte as a low 8bit, and supplementing 0 with a high 24bit to obtain a target identification of the QUIC connection;
and if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
In a sixth aspect, an embodiment of the present invention provides a packet transmission apparatus, applied to a receiving end, including: a processor and a transceiver;
the transceiver is used for receiving a second QUIC message sent by NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and the processor is used for processing according to the second QUIC message.
Wherein, the second QUIC message is obtained by the following method:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
In a seventh aspect, an embodiment of the present invention further provides a communication device, including: a transceiver, a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the steps in the message transmission method as described above when executing the program.
In an eighth aspect, an embodiment of the present invention further provides a readable storage medium, where the readable storage medium stores a program, and the program, when executed by a processor, implements the steps in the message transmission method described above.
In the embodiment of the invention, a second QUIC message is obtained according to a first QUIC message obtained by a QUIC client, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field. By the method, the NAT equipment which does not support the QUIC protocol can accurately maintain the life cycle of the QUIC long connection port mapping table entry, so that the condition that the NAT equipment carries out NAT mapping timeout aging and rebinding on the QUIC long connection session to cause the change of the session source port can be avoided.
Drawings
Fig. 1 is a flowchart of a message transmission method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a QUIC message format;
fig. 3 is a second flowchart of a message transmission method according to an embodiment of the present invention;
fig. 4 is one of the structural diagrams of a message transmission apparatus according to an embodiment of the present invention;
fig. 5 is a second structural diagram of a message transmission apparatus according to an embodiment of the present invention;
fig. 6 is a third structural diagram of a message transmission apparatus according to an embodiment of the present invention;
fig. 7 is a fourth structural diagram of a message transmission apparatus according to an embodiment of the present invention.
Detailed Description
The term "and/or" in the embodiments of the present invention describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a flowchart of a message transmission method provided in an embodiment of the present invention, and is applied to a NAT device, as shown in fig. 1, including the following steps:
step 101, obtaining a first QUIC message from a QUIC client, wherein a connection identification field of the first QUIC message is used for identifying the connection of the QUIC.
The format of the first QUIC message is shown in fig. 2, where a Connection ID (Connection identification) field is used to identify a Connection of a QUIC, for example, the Connection ID of a Connection of the QUIC may be stored. The length of this field is variable and may be 0, 1, 4 or 8 bytes, depending on the encoding of the Flags field.
Two bits of Bit2 and Bit3 of the Flags field are used for indicating the length of the Connection ID in the message. The correspondence between Bit2 and Bit3 codes and Connection ID lengths is as follows:
0x0C (Bit3 and Bit2 are both 1) indicates that the length of the Connection ID is 8 bytes;
0x08(Bit3 Bit 1, Bit2 is 0) indicates that the length of Connection ID is 4 bytes;
0x04(Bit3 Bit 0, Bit2 is 1) indicates that the length of Connection ID is 1 byte;
0x00(Bit3 and Bit2 are both 0) indicates no Connection ID.
And 102, obtaining a second QUIC message according to the first QUIC message.
And the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
Specifically, in this step, the destination identifier of the QUIC connection may be filled in an option field of an IPv4 header to obtain the second QUIC packet; or filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
And if the target identification of the QUIC connection is filled in an option field of an IPv4 message header, reading the encoding value of a Flags field of the first QUIC message, and determining the target identification of the QUIC connection according to the encoding value of the Flags field. And finally, filling the target identification of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message. In the mode, the filling of the target identification of the QUIC connection is realized by expanding the option field of the IPv4 message header, the IPv4 protocol is slightly changed, the QUIC protocol stack is not required to be changed, and the method is easy to realize.
And if the target identification of the QUIC connection is filled in the extension field of the IPv6 message header, reading the encoding value of the Flags field of the first QUIC message, and determining the target identification of the QUIC connection according to the encoding value of the Flags field. And filling the target identification of the QUIC connection in an extension field of an IPv6 message header to obtain the second QUIC message. In the mode, the filling of the target identification of the QUIC connection is realized by expanding the option field of the IPv4 message header, the IPv6 protocol is slightly changed, the QUIC protocol stack is not required to be changed, and the method is easy to realize.
In both cases, the target identity of the QUIC connection can be determined as follows: and determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field, and determining the target identification of the QUIC connection according to the information of the connection identification field of the first QUIC message.
According to the corresponding relation between the Bit2 and Bit3 codes and the Connection ID length described in the step 101, if both Bit2 and Bit3 of the Flags field are 1, the Connection identification field of the first QUIC message stores a QUIC Connection identification with 8 bytes; if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message; if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message; and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
In the embodiment of the invention, if the option field of the IPv4 header is extended, since the option field of the IPv4 header can be 32 bits at most, in this case, 32 bits are used to identify the QUIC connection. If the extension field of the extended IPv6 header, although it may exceed 32 bits, in an embodiment of the present invention, the QUIC connection may still be identified using 32 bits.
According to the different information stored in the connection identification field of the first QUIC message, the target identification of the QUIC connection can be determined in different modes:
(1) and if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection.
That is, if the Connection ID of the first QUIC header is 8 bytes, that is, 64 bits, the Connection ID of the 64 bits is hashed to generate a hash value of 32bi t, and the hash value of 32bi t is used as the target identifier.
(2) And if the connection identification field of the first QUIC message stores the QUIC connection identification of 4 bytes, taking the QUIC connection identification of 4 bytes as the target identification of the QUIC connection.
That is, if the Connection ID of the header of the first QUIC packet is 4 bytes, that is, 32 bits, the Connection ID of the first QUIC packet is directly used as the target identifier.
(3) And if the connection identification field of the first QUIC message stores 1 byte of QUIC connection identification, taking the 1 byte of QUIC connection identification as a low 8bit, and supplementing 0 to a high 24bit to obtain the target identification of the QUIC connection.
That is, if the Connection ID of the first QUIC header is 1 byte, i.e., 8 bits, then the Connection ID of the first QUIC header is used as a low 8bit, and all high 24 bits are complemented by 0, so as to obtain the target identifier.
(4) And if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
That is, if the Connection ID of the first QUIC header is 0 bytes, the NAT device can generate a randomly generated 32-bit value and use the 32-bit value as the destination identifier of the QUIC Connection. Wherein the randomly generated 32bit value may be different from the identity of other QUIC connections. For example, the NAT device may generate a random number of 32 bits using a random number generator, and the random number is unique and uses the random number as the target identifier.
And 103, sending the second QUIC message to a receiving end.
The receiving end may be a server, a load balancing device, a firewall, an exchange routing device, and the like.
As can be seen from the above description, in the embodiment of the present invention, a second QUIC message is obtained according to a first QUIC message obtained by a QUIC client, where a reserved field of a header of the second QUIC message is used to uniquely identify the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field. By the method, the NAT equipment which does not support the QUIC protocol can accurately maintain the life cycle of the QUIC long connection port mapping table entry, so that the condition that the NAT equipment carries out NAT mapping overtime aging and rebinding on the QUIC long connection session to cause the change of a session source port can be avoided. That is, the NAT device does not need to support the identification capability of the QUIC protocol to accurately maintain the life cycle of the port mapping table entries, thereby preventing random aging of long connections to the QUIC.
In addition, the QUIC connection is identified through an option field of an IPv4 message or an extension field of an IPv6 message, and the introduced overhead is small; and the stock NAT equipment is not required to be modified and upgraded, so that the deployment and popularization of the QUIC protocol in the existing network are facilitated.
Referring to fig. 3, fig. 3 is a flowchart of a message transmission method provided in the embodiment of the present invention, and is applied to a receiving end, as shown in fig. 3, including the following steps:
step 301, receiving a second QUIC message sent by NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client.
The receiving end may be a server, a load balancing device, a firewall, an exchange routing device, and the like.
And step 302, processing according to the second QUIC message.
According to different receiving ends, the processing mode is different. For example, if the receiving end is a load balancing device, the load balancing device performs load balancing processing according to the second QUIC message.
As can be seen from the above description, in the embodiment of the present invention, a second QUIC message is obtained according to a first QUIC message obtained by a QUIC client, where a reserved field of a header of the second QUIC message is used to uniquely identify the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field. By the method, the NAT equipment which does not support the QUIC protocol can accurately maintain the life cycle of the QUIC long connection port mapping table entry, so that the condition that the NAT equipment carries out NAT mapping overtime aging and rebinding on the QUIC long connection session to cause the change of a session source port can be avoided.
The embodiment of the invention also provides a message transmission device which is applied to the NAT equipment. Referring to fig. 4, fig. 4 is a structural diagram of a message transmission apparatus according to an embodiment of the present invention. Because the problem solving process of the message transmission device is similar to the message transmission method in the embodiment of the invention, the implementation of the message transmission device can refer to the implementation of the method, and repeated parts are not described again.
As shown in fig. 4, the message transmission apparatus 400 includes: a first obtaining module 401, configured to obtain a first QUIC message from a QUIC client, where a connection identification field of the first QUIC message is used to identify a QUIC connection; a second obtaining module 402, configured to obtain a second QUIC message according to the first QUIC message; a first sending module 403, configured to send the second QUIC packet to a receiving end; and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
Wherein the second obtaining module comprises:
the first obtaining submodule is used for filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And the second obtaining submodule is used for filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
Wherein the first obtaining sub-module includes:
the first acquisition unit is used for reading the coded value of the flag field flag of the first QUIC message;
the determining unit is used for determining the target identification of the QUIC connection according to the coding value of the Flags field;
and the first filling unit is used for filling the target identifier of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message.
Wherein the second obtaining sub-module includes:
the second acquisition unit is used for reading the coding value of the Flags field of the first QUIC message;
the determining unit is used for determining the target identification of the QUIC connection according to the coding value of the Flags field;
and the second filling unit is used for filling the target identifier of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
Wherein the determination unit includes:
the first determining submodule is used for determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field;
and the second determining submodule is used for determining the target identifier of the QUIC connection according to the information of the connection identifier field of the first QUIC message.
Wherein the first determining submodule is configured to:
if both Bit2 and Bit3 of the Flags field are 1, storing a QUIC connection identifier of 8 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message;
and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
Wherein the second determining submodule is configured to:
if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 4 bytes, taking the QUIC connection identification with 4 bytes as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 1 byte, taking the QUIC connection identification with 1 byte as a low 8bit, and supplementing 0 with a high 24bit to obtain a target identification of the QUIC connection;
and if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
The apparatus provided in the embodiment of the present invention may implement the method embodiments described above, which achieve similar practical and technical effects, and this embodiment is not described herein again.
The embodiment of the invention also provides a message transmission device which is applied to the receiving end. Referring to fig. 5, fig. 5 is a structural diagram of a message transmission apparatus according to an embodiment of the present invention. Because the problem solving process of the message transmission device is similar to the message transmission method in the embodiment of the invention, the implementation of the message transmission device can refer to the implementation of the method, and repeated parts are not described again.
As shown in fig. 5, the message transmission apparatus 500 includes: a first receiving module 501, configured to receive a second QUIC message sent by a NAT device, where a reserved field of a message header of the second QUIC message is used to uniquely identify the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client; and the first processing module 502 is configured to perform processing according to the second QUIC message.
Wherein, the second QUIC message is obtained by the following method:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
The apparatus provided in the embodiment of the present invention may implement the method embodiments described above, which achieve similar practical and technical effects, and this embodiment is not described herein again.
The embodiment of the invention also provides a message transmission device which is applied to the NAT equipment. Referring to fig. 6, fig. 6 is a structural diagram of a message transmission apparatus according to an embodiment of the present invention. Because the problem solving process of the message transmission device is similar to the message transmission method in the embodiment of the invention, the implementation of the message transmission device can refer to the implementation of the method, and repeated parts are not described again.
As shown in fig. 6, the message transmission apparatus 600 includes: a processor 601 and a transceiver 602;
the transceiver 602 is configured to obtain a first QUIC message from a QUIC client, where a connection identification field of the first QUIC message is used to identify a QUIC connection;
the processor 601 is configured to obtain a second QUIC message according to the first QUIC message;
the transceiver 602 is configured to send the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
The processor 601 is configured to fill a target identifier of the QUIC connection in an option field of an IPv4 header to obtain the second QUIC packet; or filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
The processor 601 is configured to read an encoded value of a flag field flag of the first QUIC packet; determining a target identifier of the QUIC connection according to the coded value of the Flags field; and filling the target identification of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message.
The processor 601 is configured to read an encoded value of a Flags field of the first QUIC packet; determining a target identifier of the QUIC connection according to the coded value of the Flags field; and filling the target identification of the QUIC connection in an extension field of an IPv6 message header to obtain the second QUIC message.
The processor 601 is configured to determine information of a connection identifier field of the first QUIC packet according to values of Bit2 and Bit3 of the Flags field; and determining the target identification of the QUIC connection according to the information of the connection identification field of the first QUIC message.
Wherein the processor 601 is configured to:
if both Bit2 and Bit3 of the Flags field are 1, storing a QUIC connection identifier of 8 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message;
and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
Wherein the processor 601 is configured to:
if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 4 bytes, taking the QUIC connection identification with 4 bytes as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 1 byte, taking the QUIC connection identification with 1 byte as a low 8bit, and supplementing 0 with a high 24bit to obtain a target identification of the QUIC connection;
and if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
The apparatus provided in the embodiment of the present invention may implement the method embodiments described above, which achieve similar practical and technical effects, and this embodiment is not described herein again.
The embodiment of the invention also provides a message transmission device which is applied to the receiving end. Referring to fig. 7, fig. 7 is a structural diagram of a message transmission apparatus according to an embodiment of the present invention. Because the problem solving process of the message transmission device is similar to the message transmission method in the embodiment of the invention, the implementation of the message transmission device can refer to the implementation of the method, and repeated parts are not described again.
As shown in fig. 7, the message transmission apparatus 700 includes: a processor 701 and a transceiver 702;
the transceiver 702 is configured to receive a second QUIC message sent by the NAT device, where a reserved field of a header of the second QUIC message is used to uniquely identify the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and the processor 701 is configured to perform processing according to the second QUIC message.
Wherein, the second QUIC message is obtained by the following method:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
The apparatus provided in the embodiment of the present invention may implement the method embodiments described above, which achieve similar practical and technical effects, and this embodiment is not described herein again.
An embodiment of the present invention further provides a communication device, including: a transceiver, a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the steps in the message transmission method as described above when executing the program.
The embodiment of the present invention further provides a readable storage medium, where a program is stored on the readable storage medium, and when the program is executed by a processor, the program implements each process of the text processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here. The readable storage medium may be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic memory (e.g., floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical memory (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (e.g., ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), Solid State Disk (SSD)), etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. With such an understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (15)

1. A message transmission method is applied to Network Address Translation (NAT) equipment and is characterized by comprising the following steps:
acquiring a first QUIC message from a QUIC client, wherein a connection identification field of the first QUIC message is used for identifying QUIC connection;
obtaining a second QUIC message according to the first QUIC message;
sending the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
2. The method according to claim 1, wherein said deriving a second QUIC message from said first QUIC message comprises:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
3. The method according to claim 2, wherein said populating the destination identification of said QUIC connection in an option field of an IPv4 header, obtaining said second QUIC packet, comprises:
reading the coding value of the flag field flag of the first QUIC message;
determining a target identifier of the QUIC connection according to the coded value of the Flags field;
and filling the target identification of the QUIC connection in an option field of an IPv4 message header to obtain the second QUIC message.
4. The method according to claim 2, wherein said populating the destination identity of said QUIC connection in an extension field of an IPv6 header, obtaining said second QUIC packet, comprises:
reading the coding value of the Flags field of the first QUIC message;
determining a target identifier of the QUIC connection according to the coded value of the Flags field;
and filling the target identification of the QUIC connection in an extension field of an IPv6 message header to obtain the second QUIC message.
5. The method according to claim 3 or 4, wherein said determining the target identity of the QUIC connection according to the encoded value of the Flags field comprises:
determining the information of the connection identification field of the first QUIC message according to the values of the Bit2 and the Bit3 of the Flags field;
and determining the target identification of the QUIC connection according to the information of the connection identification field of the first QUIC message.
6. The method according to claim 5, wherein the determining the information of the connection identification field of the first QUIC packet according to the values of Bit2 and Bit3 of the Flags field comprises:
if both Bit2 and Bit3 of the Flags field are 1, storing a QUIC connection identifier of 8 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 0 and the Bit3 value is 1, storing a QUIC connection identifier with 4 bytes in the connection identifier field of the first QUIC message;
if the Bit2 value of the Flags field is 1 and the Bit3 value is 0, storing a QUIC connection identifier of 1 byte in the connection identifier field of the first QUIC message;
and if both the Bit2 and the Bit3 of the Flags field are 0, the connection identification field of the first QUIC message does not store the QUIC connection identification.
7. The method according to claim 6, wherein said determining the destination identification of the QUIC connection according to the information of the connection identification field of the first QUIC message comprises:
if the connection identification field of the first QUIC message stores 8 bytes of QUIC connection identification, carrying out Hash operation on the 8 bytes of QUIC connection identification to obtain a 32-bit Hash value, and taking the 32-bit Hash value as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 4 bytes, taking the QUIC connection identification with 4 bytes as a target identification of the QUIC connection;
if the connection identification field of the first QUIC message stores a QUIC connection identification with 1 byte, taking the QUIC connection identification with 1 byte as a low 8bit, and supplementing 0 with a high 24bit to obtain a target identification of the QUIC connection;
and if the connection identification field of the first QUIC message does not store a QUIC connection identification, randomly generating a 32-bit numerical value, and taking the 32-bit numerical value as a target identification of the QUIC connection.
8. A message transmission method is applied to a receiving end and is characterized by comprising the following steps:
receiving a second QUIC message sent by NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and processing according to the second QUIC message.
9. The method according to claim 8, wherein said second QUIC message is obtained by:
filling the destination identification of the QUIC connection in the option field of the IPv4 message header to obtain the second QUIC message; or
And filling the destination identification of the QUIC connection in the extension field of the IPv6 message header to obtain the second QUIC message.
10. A message transmission device is applied to NAT equipment, and is characterized by comprising:
the system comprises a first acquisition module, a first communication module and a second acquisition module, wherein the first acquisition module is used for acquiring a first QUIC message from a QUIC client, and a connection identification field of the first QUIC message is used for identifying the connection of the QUIC;
the second acquisition module is used for acquiring a second QUIC message according to the first QUIC message;
the first sending module is used for sending the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
11. A message transmission device applied to a receiving end is characterized by comprising:
the first receiving module is used for receiving a second QUIC message sent by the NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and the first processing module is used for processing according to the second QUIC message.
12. A message transmission device is applied to NAT equipment, and is characterized by comprising: a processor and a transceiver;
the transceiver is used for acquiring a first QUIC message from a QUIC client, and the connection identification field of the first QUIC message is used for identifying the connection of the QUIC;
the processor is used for obtaining a second QUIC message according to the first QUIC message;
the transceiver is used for sending the second QUIC message to a receiving end;
and the reserved field of the message header of the second QUIC message is used for uniquely identifying the QUIC connection, and the information in the reserved field is obtained according to the information in the connection identification field.
13. A message transmission device applied to a receiving end is characterized by comprising: a processor and a transceiver;
the transceiver is used for receiving a second QUIC message sent by NAT equipment, wherein a reserved field of a message header of the second QUIC message is used for uniquely identifying the QUIC connection, and information in the reserved field is obtained according to information in a connection identification field of a first QUIC message of a QUIC client;
and the processor is used for processing according to the second QUIC message.
14. A communication device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor is configured to read a program in the memory to implement the steps in the message transmission method according to any one of claims 1 to 7; or implementing the steps in the message transmission method according to any of claims 8 to 9.
15. A readable storage medium storing a program, wherein the program, when executed by a processor, implements the steps in the message transmission method according to any one of claims 1 to 7; or implementing the steps in the message transmission method according to any of claims 8 to 9.
CN202010908611.1A 2020-09-02 2020-09-02 Message transmission method, device, equipment and readable storage medium Pending CN114205425A (en)

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Publication number Priority date Publication date Assignee Title
CN105103522A (en) * 2013-03-07 2015-11-25 谷歌公司 Law latency server-side redirection of UDP-based transport protocols traversing client-side NAT firewall
WO2017132911A1 (en) * 2016-02-03 2017-08-10 华为技术有限公司 Data transmission method and apparatus
CN110519282A (en) * 2019-08-30 2019-11-29 新华三信息安全技术有限公司 A kind of method and device of Message processing
US20200120015A1 (en) * 2017-06-27 2020-04-16 Orange Method of quic communication via multiple paths

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105103522A (en) * 2013-03-07 2015-11-25 谷歌公司 Law latency server-side redirection of UDP-based transport protocols traversing client-side NAT firewall
WO2017132911A1 (en) * 2016-02-03 2017-08-10 华为技术有限公司 Data transmission method and apparatus
US20200120015A1 (en) * 2017-06-27 2020-04-16 Orange Method of quic communication via multiple paths
CN110519282A (en) * 2019-08-30 2019-11-29 新华三信息安全技术有限公司 A kind of method and device of Message processing

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