CN1297119C - Racket rank control method of applied layer protocal switching network gate - Google Patents
Racket rank control method of applied layer protocal switching network gate Download PDFInfo
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- CN1297119C CN1297119C CNB2004100314876A CN200410031487A CN1297119C CN 1297119 C CN1297119 C CN 1297119C CN B2004100314876 A CNB2004100314876 A CN B2004100314876A CN 200410031487 A CN200410031487 A CN 200410031487A CN 1297119 C CN1297119 C CN 1297119C
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Abstract
The present invention relates to the technical field of computer network communication, particularly to a universal control method over packet sequence numbers of switching gateways of application protocols by TCP protocols. The method has the following steps: step 1, a Seq_Number_Offset list structure is defined for recording the change of sequence numbers when TCP data packets are switched; step 2, a maintenance process is used for periodically updating a Seq_Number_Offset list; step 3, if the switching of a current data packet causes the length change of the data packet, the offset value of a corresponding entry in the Seq_Number_Offset list is modified; step 4, the corresponding entry is searched in the Seq_Number_Offset list by a target port according to the source address, a source port and the target address of the current data packet for reading the offset value and adjusting the sequence number and the confirmation number of the current data packet; step 5, the current packet is examined whether the current packet is a retransmission packet or not according to the sequence number, the load length and the confirmation sequence number of the current data packet. The method can also be used for the switching processes of other data packets adopting TCP protocols.
Description
Technical field
The present invention relates to the computer network communication technology field, particularly a kind of general bag sequence number control method of application protocol transfer gateway that adopts Transmission Control Protocol.
Background technology
The IPv6 agreement is the Next Generation Internet network agreement that replaces IPv4, but IPv6 and IPv4 agreement are not exclusively compatible, for example address size, package head format difference or the like.When causing adopting the network interworking of two kinds of agreements, the difference on the agreement must pass through transfer gateway.Various IPv4/IPv6 intercommunications are arranged at present and change the mechanism, two kinds of switch technologies of NATPT and TRT are more typically arranged.But no matter be which kind of all must increase the application layer conversion module when changing the mechanism in the face of incompatible application layer protocol in transfer gateway.For the FTP bag that adopts Transmission Control Protocol, in the inter-net communication that adopts IPv4 and two kinds of procotols of IPv6, will be referred to the control problem of bag sequence number.
Transmission Control Protocol is a kind of end-to-end, Connection-oriented Protocol.This agreement has remedied some deficiency of IP agreement, and wherein relatively outstanding is retransmits when Transmission Control Protocol can guarantee the IP data-bag lost, can leave out the IP packet that repeats to receive, can also guarantee exactly to re-assembly data by the sending order of original sender.TCP regards the whole message that will transmit as the data flow of byte composition one by one, then each byte is compiled a sequence number.When connection was set up, both sides will decide through consultation initial sequence number.TCP just with the sequence number of first data byte in each message segment that transmits, is placed in the sequence number field of TCP stem.Being confirmed to be of TCP represented to confirm to the highest sequence number of the data that receive.But the affirmation sequence number of returning is the highest sequence number of the data received adds 1.That is to say that acknowledged sequence number represents to expect the sequence number of first data byte of receiving next time.Therefore comprised 32 sequence numbers and 32 acknowledged sequence numbers in the TCP header that adopts the Transmission Control Protocol data packets for transmission, what Fig. 1 represented is exactly the package head format of a tcp data bag.
FTP only provides the ability that is based upon the enterprising row data communication of IPv4 before the IPv6 agreement becomes standard, and its address Network Based is 32 these hypothesis.But after IPv6 occurred, the address was just much longer than 32.Originally expansion failure sometimes in multiple protocol environment that FTP is carried out.Therefore FTP is expanded once more according to IPv6 at RFC 2428.To mainly illustrate below and a kind ofly upload the method for carry information at non-IPv4, two FTP order PORT that we are familiar with and PASV by expansion after, we claim that they are EPRT and EPSV.
For example: EPRT|2|3ffe:8330:5 ∷ 12|1909|
This command list is shown on the tcp port 1909 and opens main frame " 3ffe:8330:5 ∷ 12 " with IPv6.When wrapping in, such FTP order need convert following form to when delivering to the IPv4 network:
PORT?192，168，6，41，7，117
This conversion will cause the length of tcp data bag to shorten, and reduce by 4 bytes.Next packet sends from IPv6 to IPv4, if do not adjust its sequence number, still according to the IPv6 end that sends need send, the IPv4 receiving terminal thinks that always the bag that the other side sends lost 4 bytes so.Therefore FTP uses sequence number and the acknowledged sequence number that transfer gateway will need in time to adjust packet.
It is to be connected that the EPSV request server is intercepted on a data port etc.To its form of response and the very elephant of EPRT parameter.Its form is as follows:
Entering?Extended?Passive?Mode(|||24314|)
And use the PASV respond packet of sending for the ftp that only supports IPv4, its form is as follows:
Entering?Extended?Passive?Mode(192，168，6，41，94，250)
More than the difference that wraps on IPv4 and the IPv6 agreement about FTP order find out that translation causes payload package length and changes because of the difference of two kinds of agreements through transfer gateway for its packet of the application as FTP.And this class is applied in transport layer and adopts Transmission Control Protocol usually, so transfer gateway need in time be adjusted the sequence number and the acknowledged sequence number of packet when wrapping conversion.And this method can also be used on the transfer gateway of any employing Transmission Control Protocol.
Summary of the invention
The object of the present invention is to provide a kind of bag sequence number control method of application layer protocol transfer gateway, comprise the definition of key data structure and the flow process that sequence number is adjusted.
The present invention has designed a cover Seq_Number_Offset list structure and has write down the variation that sequence number takes place when changing of tcp packet, and at application layer conversion gateway (Application LevelGateway, ALG) add the maintenance that Seq_Number_Offset_Table shows in the handling procedure, the method that reads and revise of offset value, the packet sequence number in guaranteeing to change and the correctness of confirming number.This invention has also solved the sequence number control problem of retransmission packet simultaneously.
The key data structure that defines among the present invention is the Seq_Number_Offset table, this data structure not only can the record data bag source address, destination address, source port, destination interface, the source of bag, sequence number offset, and increased the sequence number of bag, payloadlength, ack number.The data item of back mainly is to be used for checking whether packet and current this packet that next address and port are all identical are repetitive data packet.If repetitive data packet, even variation has taken place the load length of this packet, the ALG handling procedure can not be added to the sequence number offset value of this bag in the Seq_Number_Offset table on the corresponding clauses and subclauses yet.
The key function module that defines among the present invention comprises: the reading and safeguarding of sequence number offset value.Whether maintenance module has corresponding clauses and subclauses according to the address and the port information inspection of current data packet in the Seq_Number_Offset table, if have, just revise the offset item in these clauses and subclauses, otherwise in the Seq_Number_Offset table, increase new clauses and subclauses, and record offset value.Read module then is in the Seq_Number_Offset table whether the identical address and the clauses and subclauses of port to be arranged with the port information inspection according to the address of packet, just reads otherwise puts 0 if having.
The invention technical scheme
A kind of application layer protocol transfer gateway is at the bag sequence number control method of transport layer employing Transmission Control Protocol, and concrete steps are as follows:
Step 1: definition Seq_Number_Offset list structure writes down tcp data and wraps in the variation that sequence number takes place when changing;
Step 2: maintenance process periodic refresh Seq_Number_Offset table;
Step 3:, will call the offset value of revising corresponding clauses and subclauses in the Seq_Number_Offset table if the current data packet conversion causes data packet length to change;
Step 4: source address, source port, destination address, destination interface according to current data packet are searched corresponding clauses and subclauses in the Seq_Number_Offset table, read offset value, and adjust the sequence number and the acknowledged sequence number of current data packet;
Step 5: according to the sequence number (seq number) of current data packet, loaded length (payloadlength), acknowledged sequence number (acknumber) judges whether current bag is retransmission packet.
Description of drawings
Fig. 1 is the format chart of a tcp protocol data bag of the present invention.
Fig. 2 is Sequence number of the present invention control table.
Fig. 3 is the processing data packets process that adopts bag sequence number control technology among the present invention.
Embodiment
The format chart of the tcp protocol data bag of Fig. 1.32 sequence numbers and 32 acknowledged sequence numbers are exactly the critical field that causes changing owing to conversion among the present invention among this figure.Source port number can be used for usually differentiating that with the destination slogan different TCP is connected clauses and subclauses.When changing of TCP hair, need in time adjust in this structure chart 16 bit trials and.
Among Fig. 1, this figure illustrates that the packet header of tcp data bag has comprised 32 sequence number and 32 affirmation sequence number.Because adopting the application of Transmission Control Protocol usually all can check sequence number and acknowledged sequence number.If because conversion has caused length of data package to change, its corresponding sequence number also must be adjusted so, otherwise recipient and transmit leg can't collaborative works.
Among Fig. 2, Sequence number control table.The sequence number offset-lists that generates by this control table structure can identify each uniquely through TCP connection of transfer gateway and the direction that is connected.In order to differentiate retransmission packet, we have also increased clauses and subclauses in this list structure.When carrying out the Sequencenumber offset correction, at first judge whether it is retransmission packet at every turn,, and directly obtain offset value in the present table if just do not revise.
Source_address, Source_port, Destination_address, Destination_port represent source address, source port number, destination address and destination slogan in this data structure.Offset_from_v4, Offset_from_v6 record v4 is to v6 or the side-play amount from v6 to the v4 direction.Whether accesses_before_terminate is used for judging this list item with deleted, and this is that Seq_Number_Offset table maintenance process is used.Pre_seqnumber_v4, pre_payloadlen_v4, pre_acknumber_v4, pre_seqnumber_v6, these six data item of pre_payloadlen_v6, pre_acknumber_v6 have write down the attribute of a last packet respectively.
At first the present invention has defined key data structure shown in Figure 2.Source_address, Source_port, Destination_address, Destination_port represent source address, source port number, destination address and destination slogan in this data structure.Offset_from_v4, Offset_from_v6 record v4 is to v6 or the side-play amount from v6 to the v4 direction.Whether accesses_before_terminate is used for judging this list item with deleted, and this is that Seq_Number_Offset table maintenance process is used.Pre_seqnumber_v4, pre_payloadlen_v4, pre_acknumber_v4, pre_seqnumber_v6, these six data item of pre_payloadlen_v6, pre_acknumber_v6 have write down the attribute of a last packet respectively.If a last packet is the v4 bag, the length of its bag sequence number, payload package, acknowledged sequence number just are stored in the first three data item so.If the v6 bag, the length of its bag sequence number, payload package, acknowledged sequence number just are stored in next three data item so.These data item are to be used for judging whether the current packet of handling is a retransmission data packet may.
Be to realize bag sequence number control technology, we comprise the functional module of design: the correction of sequence numberoffset value and reading.
(1), whether correcting module has corresponding clauses and subclauses according to the address and the port information inspection of current data packet in the Seq_Number_Offset table.If have, just revise the offset item in these clauses and subclauses, otherwise in the Seq_Number_Offset table, increase new clauses and subclauses, and record offset value.
(2), read module then is in the Seq_Number_Offset table whether the identical address and the clauses and subclauses of port to be arranged with the port information inspection according to the address of packet, just read otherwise put 0 if having.
Have a look the handling process of packet below, see Fig. 3:
A FTP packet load transfer flow process, step S1 receives a FTP packet, and step S2 at first carries out keyword relatively to its load content, for example: PORT, EPRT, PASV, EPSV or the like.Step S3 finds the keyword of coupling, judges whether keyword mates, if coupling, step S4 then carries out the conversion of keyword.The side-play amount of corresponding clauses and subclauses in the step S5 revision sequence number table.Step S6, sequence number number of revising current bag, step S9 revises the affirmation sequence number of current bag by reading reverse sequence number side-play amount then.Step s10 recomputate a pseudo-verification and.If when carrying out the keyword coupling, do not find corresponding keyword, step S7 then carries out, and reads the offset value of current data packet sequence number, and step S8 revises the sequence number of current data packet.By reading reverse sequence number side-play amount, step S9 revises the affirmation sequence number of current bag then, step S10 recomputate a pseudo-verification and.
(1), for a FTP packet, at first its load content is carried out keyword coupling, for example: PORT, EPRT, PASV, EPSV or the like.If find the keyword of coupling, then advance to carry out the step in (2).Otherwise the read module of sequence number offset value will be called for twice.The effect of this function is exactly to return the seq_offset. that writes down in Seq_Number_Offset table source address, source port, destination address, the destination interface clauses and subclauses identical with the value of this function passes to call array function processing down: ALG_Retrieve_Sequence_Number_Offset (Source_Address_String
htons(ptcp_header_in->th_sport)，
Dest_Address_String，
pIP_header_in->Dest_port，
network_source，
&new_payload_offset)；
The parameter that this function comprises: source address, source port, destination address, destination interface.Before Network_source represents to change the agreement of packet promptly be Ipv4 or.The return value of this function is new_payload_offset.This value is used for revising the sequence_number+=new_payload_offset of current data packet.ALG_Retrieve_Sequence_Number_Offset(Source_Address_String，
htons(ptcp_header_in->th_sport)，
Dest_Address_String，
pIP_header_in->Dest_port，
network_source，
&new_acknowledge_offset)；
What the network_source in this function write down is the direction opposite with current data packet.What for example work as pre-treatment is a v4 packet, the network_source=IPv6 so here; And when revising sequence number table and call general introduction, network_source=IPv4 promptly equals these data the procotol that is adopted before conversion.
The return value of this function is new_acknowledge_offset.This value is used for revising the ack_number=ack_number-new_acknowledge_offset of current data packet
The present invention did following processing when (2) packet was transformed into another procotol from a kind of procotol, and at first, the present invention can call following function:
ALG_Amend_Sequence_Number_Offset(Source_Address_String，
htons(ptcp_header_in->th_sport)，
Dest_Address_String，
pIP_header_in->Dest_port，
total_payload_offset，
IPV6，
htonl(ul_th_seq)，
pIP_header_in->Payload_length，
htonl(ul_th_ack)，
&new_payload_offset)；
This function parameters has also increased seqnumber, payload_length, ack_number except the information such as source address of bag, and the value of returning leaves new_payload_offset in.
sequence_number＝sequence_number+(new_payload_offset-
total_payload_offset)；
The function of this function:
Then: call the ALG_Retrieve_Sequence_Number_Offset function, read corresponding offset value.
ALG_Retrieve_Sequence_Number_Offset(Source_Address_String，
htons(ptcp_header_in->th_sport)，
Dest_Address_String，
pIP_header_in->Dest_port，
IPv4，
&new_acknowledge_offset)；
The direction of noting network_source and actual packet in this function is opposite.Because the ack_number record is the side-play amount of another one direction.
(3) control technology of retransmission packet
The present invention has increased by three list items in the Seq_Number_Offset table.When will in this table, increasing new clauses and subclauses or will revising to the offset value in the seq number offset table, meeting of the present invention is the sequnumber of current data packet, payload length, acknumber are saved in the seq number offset table.If packet derives from the v4 agreement, then these data item can be saved in
pre_seqnumber_v4；
pre_payloadlen_v4；
pre_acknumber_v4；
Otherwise, more than three contents can be saved in three following list items:
pre_seqnumber_v6；
pre_payloadlen_v6；
pre_acknumber_v6；
For each bag that need make amendment to SEQ number and ACK number, program all can at first compare SEQ number, Payloadlen and the ACK number of current data packet.If record is identical in these of current data packet and the table, can judge that so this packet is a repetitive data packet.The system program corresponding list item of SEQ table that just no longer the side-play amount of current data packet is added to.
(4) maintenance process
Maintenance process is responsible for regularly the Seq_Number_Offset table being refreshed.System all can be with accesses_before_terminate value-1 when refreshing at every turn.If this value has been 0, maintenance process will be deleted these clauses and subclauses.For reading this table and revising the process of this table, when reading one of them list item, all accesses_before_terminate can be changed to maximum at every turn.
Claims (4)
1, a kind of application layer protocol transfer gateway is characterized in that at the bag sequence number control method of transport layer employing Transmission Control Protocol concrete steps are as follows:
Step 1: definition Seq_Number_Offset list structure writes down tcp data and wraps in the variation that sequence number takes place when changing;
Step 2: maintenance process periodic refresh Seq_Number_Offset table;
Step 3:, will call the offset value of revising corresponding clauses and subclauses in the Seq_Number_Offset table if the current data packet conversion causes data packet length to change;
Step 4: source address, source port, destination address, destination interface according to current data packet are searched corresponding clauses and subclauses in the Seq_Number_Offset table, read offset value, and adjust the Sequence and Acknowledgment Number of current data packet;
Step 5: according to the sequence number of current data packet, loaded length, acknowledged sequence number judges whether current bag is retransmission packet.
2. the TCP of protocol conversion gateway according to claim 1 bag sequence number control method is characterized in that, wherein step 2 is set regularly the Seq_Number_Offset table is refreshed, and does not have the clauses and subclauses of accessed mistake will be deleted for a long time.
3. the TCP of protocol conversion gateway according to claim 1 wraps the sequence number control method, it is characterized in that, wherein step 5 will be searched corresponding clauses and subclauses according to source address, source port, destination address, destination interface, bag sequence number and the acknowledged sequence number of current data packet in the Seq_Number_Offset table, if finding has identical packet, then do not revise current destination packet sequence number sequencenumber.
4, a kind of application layer protocol transfer gateway is characterized in that at the bag sequence number control method of transport layer employing Transmission Control Protocol:
Definition Seq_Number_Offset list structure writes down tcp data and wraps in the variation that sequence number takes place when changing;
Source address, source port, destination address, destination interface according to current data packet are searched corresponding clauses and subclauses in the Seq_Number_Offset table, read offset value, and adjust the Sequence and Acknowledgment Number of current data packet, and its concrete steps are as follows:
Step S1 receives a FTP packet;
Step S2 carries out keyword relatively to its load content;
Step S3 judges whether keyword mates; If coupling, execution in step S4; If do not match, execution in step S7;
Step S4 carries out the conversion of keyword;
Step S5, the side-play amount of corresponding clauses and subclauses in the revision Seq_Number_Offset table;
Step S6 revises the sequence number of current bag;
Step S7 reads the offset value of current data packet sequence number;
Step S8, the sequence number of modification current data packet;
Step S9 by reading reverse sequence number side-play amount, revises the affirmation sequence number of current bag;
Step S10, recomputate a pseudo-verification and.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017538335A (en) * | 2014-10-30 | 2017-12-21 | 中国科学院声学研究所Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ａｃｏｕｓｔｉｃｓ， Ｃｈｉｎｅｓｅ Ａｃａｄｅｍｙ Ｏｆ Ｓｃｉｅｎｃｅｓ | TCP man-in-the-middle processing method in a mode without protocol stack |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101043434B (en) * | 2006-06-30 | 2010-12-08 | 华为技术有限公司 | Method for refreshing conversational list |
| CN102202076B (en) * | 2010-03-23 | 2014-08-27 | 深圳市金蝶中间件有限公司 | Data transmitting method and device and data sending and receiving methods and devices |
| CN107783819A (en) * | 2017-10-30 | 2018-03-09 | 郑州云海信息技术有限公司 | A kind of storage method, device and the medium of virtual link relation |
| CN109842465A (en) * | 2017-11-24 | 2019-06-04 | 阿里巴巴集团控股有限公司 | Data transmission method, data end equipment |
| CN112422238B (en) * | 2020-11-15 | 2022-08-05 | 珠海一微半导体股份有限公司 | Method for improving safety of parallel sending data and heterogeneous system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000013436A2 (en) * | 1998-08-28 | 2000-03-09 | Nokia Oy | A method and system for supporting the quality of service in wireless networks |
| WO2000035163A1 (en) * | 1998-12-08 | 2000-06-15 | Nokia Mobile Phones Ltd. | A method for optimizing of data transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000013436A2 (en) * | 1998-08-28 | 2000-03-09 | Nokia Oy | A method and system for supporting the quality of service in wireless networks |
| WO2000035163A1 (en) * | 1998-12-08 | 2000-06-15 | Nokia Mobile Phones Ltd. | A method for optimizing of data transmission |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017538335A (en) * | 2014-10-30 | 2017-12-21 | 中国科学院声学研究所Ｉｎｓｔｉｔｕｔｅ Ｏｆ Ａｃｏｕｓｔｉｃｓ， Ｃｈｉｎｅｓｅ Ａｃａｄｅｍｙ Ｏｆ Ｓｃｉｅｎｃｅｓ | TCP man-in-the-middle processing method in a mode without protocol stack |
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