Methods, systems, and computer readable media for uniquely identifying session contexts for handling spiral calls in a session initiation protocol (sip) call stateful proxy

A system for identifying session contexts for handling spiral calls, the system comprising:

• a session initiation protocol (SIP) session manager including at least one processor implemented in hardware and further including a memory;
• and
• a session context identification manager comprising computer executable instructions stored in the memory and executable by the at least one processor for:
• receiving, from a first node, a first SIP request message for establishing a first session, the first SIP request message including a Call-Id and a From header tag;
• determining that the first SIP request message is a request for establishing a new session;
• and
• in response to determining that the first SIP request message is a request for establishing a new session, generating, using a source Internet protocol (IP) address and source transport layer port number associated with the first SIP request message, a first session context identifier for identifying an ingress leg of the first session;
• generating, using a destination IP address and destination transport layer port number associated with the first SIP request message, a second session context identifier for identifying an egress leg of the first session;
• creating a first session context database record for the first session and mapped to the first and second session context identifiers;
• and
• generating and routing a first outbound SIP request message corresponding to the first SIP request message.

A non-transitory computer readable medium having stored thereon executable instructions that when executed by a processor of a computer control the computer to perform steps comprising:

• at a session initiation protocol (SIP) session manager:
• receiving, from a first node, a first SIP request message for establishing a first session, the first SIP request message including a Call-Id and a From header tag;
• determining that the first SIP request message is a request for establishing a new session;
• and
• in response to determining that the first SIP request message is a request for establishing a new session, generating, using a source Internet protocol (IP) address and source transport layer port number associated with the first SIP request message, a first session context identifier for identifying an ingress leg of the first session;
• generating, using a destination IP address and destination transport layer port number associated with the first SIP request message, a second session context identifier for identifying an egress leg of the first session;
• creating a first session context database record for the first session and mapped to the first and second session context identifiers;
• and
• generating and routing a first outbound SIP request message corresponding to the first SIP request message.