Systems and methods for managing ports for RTSP across cores in a multi-core system
The present application is directed towards systems and methods for systems and methods for handling real-time streaming protocol sessions by an intermediary multi-core system. When a multi-core intermediary receives a setup request for a real-time streaming protocol session, the intermediary processes and forwards the request to a server providing the streaming media. The server sets up an RTSP session and transmits a session identification to the multi-core intermediary. A core of the intermediary receives the transmitted session identification and determines an owner core of the session, based on a hash of the session identification. The core transmits the session information to the determined owner core, which selects two consecutive ports on which to establish listening services. The owner core then notifies all other cores to establish listening services on the same consecutive ports, such that any core that receives an RTSP control message from a client can handle it properly.
1. A method for allocating ports among a plurality of cores of a multi-core device to handle multi-port protocols, the method comprising:
(a) allocating, by a device comprising a plurality of cores and intermediary to a plurality of a clients and a plurality of servers, a predetermined range of port numbers of a port space to each core of the plurality of cores, the port space comprising a plurality of port numbers of the device;
(b) receiving, by a core of the plurality of cores, a request from a client of the plurality of clients to establish a session with a server via a multiple port protocol;
(c) selecting, by the core, two ports available from the core's allocated predetermined range of port numbers;
(d) establishing, by the core, a first listening service on a first port of the two ports and a second listening service on a second port of the two ports; and
(e) transmitting, by the core, to the client a response identifying the first port and the second port of the device, the response modified from a response of the server to replace port numbers in the response of the server with port numbers of the two ports selected by the core.
2. The method of claim 1 , further comprising broadcasting, by the core, to other cores of the plurality of cores, a message identifying the two ports.
3. The method of claim 2 , further comprising establishing, by each of the others cores, a listening service on each of the two ports.
4. The method of claim 1 , wherein step (a) further comprises establishing, by the device, the plurality of port numbers of the port space as a range of port numbers of the device from a predetermined port number to a maximum port number.
5. The method of claim 1 , wherein step (a) further comprises allocating, by the device, to each core, the predetermined range of port numbers based on a number of cores of the plurality of cores.
6. The method of claim 1 , wherein step (b) further comprises receiving, by the core, the request to establish a real-time protocol session, the session using one port for data and another port for control information.
7. The method of claim 1 , wherein step (c) further comprises selecting, by the core, as the first port a next available port from the core's allocated predetermined range of ports and a consecutive port to the first port as the second port.
8. The method of claim 1 , wherein step (d) further comprises registering, by the core, the first listening service on the first port and the second listening service on the second port.
9. The method of claim 1 , further comprising determining, by a second core of the plurality of cores responsive to a hash of a session identifier, the core is an owner of the session.
10. A system for allocating ports among a plurality of cores of a multi-core device to handle multi-port protocols, the system comprising:
a device comprising a plurality of cores and intermediary to a plurality of a clients and a plurality of servers, the device having a port space comprising a plurality of port numbers of the device;
wherein the device allocates to each core of the plurality of cores a predetermined range of port numbers of the port space;
a core of the plurality of cores receiving a request from a client of the plurality of clients to establish a session with a server via a multiple port protocol and selecting two ports available from the core's allocated predetermined range of port numbers;
a first listening service established by the core on a first port of the two ports and a second listening service established by the core on a second port of the two ports; and
wherein the core transmits to the client a response identifying the first port and the second port of the device, the response modified from a response of the server to replace port numbers in the response of the server with port numbers of the two ports selected by the core.
11. The system of claim 10 , wherein the core broadcasts to other cores of the plurality of cores, a message identifying the two ports.
12. The system of claim 11 , wherein each of the others cores establishes a listening service on each of the two ports.
13. The system of claim 10 , wherein the device establishes the plurality of port numbers of the port space as a range of port numbers of the device from a predetermined port number to a maximum port number.
14. The system of claim 10 , wherein the device allocates to each core, the predetermined range of port numbers based on a number of cores of the plurality of cores.
15. The system of claim 10 , wherein the core receives the request to establish a real-time protocol session, the session using one port for data and another port for control information.
16. The system of claim 10 , wherein the core selects as the first port a next available port from the core's allocated predetermined range of ports and a consecutive port to the first port as the second port.
17. The system of claim 10 , wherein the core registers the first listening service on the first port and the second listening service on the second port.
18. The system of claim 10 , wherein a second core of the plurality of cores, responsive to a hash of a session identifier, determines the core is an owner of the session.