US 7,397,800 B2 · Method and system for data placement of out-of-order (OOO) TCP segments

Abstract

Certain aspects of the invention provide handling out-of-order TCP segments and may include placing a first received segment in a host buffer and determining whether a second received segment is an in-order or out-of-order (OOO) segment. Control information associated with OOO segments may be stored locally on a network interface card (NIC) and the OOO segment placed in a host buffer rather than on the NIC. An address or location occupied by an end of the first received segment may be recorded and stored on the NIC. As in-order and/or OOO segments are received, control information associated with a starting address and/or end address may be stored on the NIC. Accordingly, as subsequent in-order and/or OOO segments are received, they may be correctly placed within the host buffer based on the recorded and/or stored control information without being buffered on the NIC.

Claims57

Dependent claims

A method for handling out-of-order TCP segments, the method comprising:

one or both of placing a first received TCP segment in a host buffer and/or having a mapping between a TCP sequence number and a corresponding buffer address;
determining whether a second received TCP segment is one of an in-order TCP segment or an out-of-order TCP segment;
if the second received TCP segment is an out-of-order TCP segment:
storing control information associated with at least said second TCP segment locally on a network interface card (NIC);
and
placing said out-of-order TCP segment in a portion of said host buffer;
recording at least a buffer address occupied by an end of said first received TCP segment on said NIC, said buffer being one or more of a TCP buffer, an ULP buffer and/or an application buffer;
and
if said second received TCP segment is an in-order TCP segment:
placing said in-order TCP segment adjacent to said first received TCP segment in said host buffer;
placing said in-order TCP segment starting from an address adjacent to said recorded address occupied by said end of said first received TCP segment in said host buffer;
and
one or both of:
recording by said NIC, one or more of data indicating:
an end buffer address occupied by an end of said in-order TCP segment;
a start buffer address plus a length of a data portion of said in-order TCP segment;
and
a buffer address of a byte following an end of said in-order TCP segment;
and
storing on said NIC, control information associated with at least one of said indicating data.

17 more elements

A computer readable medium, stored with, embodied with or encoded with a computer program or computer executable instructions for handling out-of-order TCP segments, the at least one code section being executable by a machine for causing the machine to perform steps comprising:

one or both of placing a first received TCP segment in a host buffer and/or having a mapping between a TCP sequence number and a corresponding buffer address;
determining whether a second received TCP segment is one of an in-order TCP segment or an out-of-order TCP segment;
if said second received TCP segment is an out-of-order TCP segment:
storing control information associated with at least said second TCP segment locally on a network interface card (NIC);
and
placing said out-of-order TCP segment in a portion of said host buffer;
and
one or both of:
recording on said NIC, one or both of data indicating:
an address occupied by a start of said placed out-of-order TCP segment and an address occupied by an end of said placed out-of-order TCP segment;
and
a start buffer address plus a length occupied by said placed out-of-order TCP segment;
and
storing on said NIC, control information associated with said indicating data on said NIC.

11 more elements

A system for handling out-of-order TCP segments, the system comprising:

at least one processor for one or both of placing a first received TCP segment in a host buffer and/or having a mapping between a TCP sequence number and a corresponding buffer address;
said at least one processor determines whether a second received TCP segment is one of an in-order TCP segment or an out-of-order TCP segment;
if said second received TCP segment is an out-of-order TCP segment:
said at least one processor stores control information associated with at least said second TCP segment locally on a network interface card (NIC);
and
said at least one processor places said out-of-order TCP segment in a portion of said host buffer;
said at least one processor records at least a buffer address occupied by an end of said first received TCP segment on said NIC, said buffer being one of a TCP buffer, ULP buffer and an application buffer;
said at least one processor places said in-order TCP segment adjacent to said first received TCP segment in said host buffer if said second received TCP segment is an in-order TCP segment;
said at least one processor places said in-order TCP segment starting from an address adjacent to said recorded address occupied by said end of said first received TCP segment in said host buffer;
and
said at least one processor performs one or both of:
records by said NIC, one or more of data indicating:
an end buffer address occupied by an end of said in-order TCP segment;
a start buffer address plus a length of a data portion of said in-order TCP segment;
and
a buffer address of a byte following an end of said in-order TCP segment;
and
stores on said NIC, control information associated with at least one of said indicating.

15 more elements

Dependencies are inferred from the claim text.

Method and system for data placement of out-of-order (OOO) TCP segments

Life of this patent

Method and system for data placement of out-of-order (OOO) TCP segments

Life of this patent

Abstract

Claims57