Content delivery system using embedded requestor information
A DNS resolution request for a hostname of a CDN is received. An edge server of the CDN may be identified, which may be associated with a subnet. The subnet is used to generate a response IP address, where the remaining bits of the response IP address may be used to store requestor information (e.g., a requestor IP address). When a client computing device uses the response IP address to access the edge server, requestor information is extracted and associated with client computing device information (e.g., an IP address and/or location, etc.) in an association record. Association records may be used to determine predicted characteristics for devices served by a requestor. When the authoritative DNS server resolves a request from the requestor, such predicted characteristics may be used rather than relying solely on information about a requestor. Thus, an edge server proximate to the predicted location may be returned instead.
1. A system comprising:
at least one processor; and
memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the system to perform a set of operations, the set of operations comprising:
receiving a request to resolve a hostname of a content distribution network (CDN), the request comprising a source Internet Protocol (IP) address of a requestor;
determining an edge server of the CDN, wherein the edge server is associated with an IP address subnet;
generating, based on the IP address subnet of the edge server, a response IP address comprising requestor information, the requestor information comprising an indication of the source IP address of the requestor, wherein the response IP address includes the IP address subnet of the edge server; and
providing a response to the request to resolve the hostname, wherein a payload of the response comprises the generated response IP address.
2. The system of claim 1 , wherein:
the generated response IP address is an IPv6 address;
the source IP address of the requestor is an IPv4 address; and
the indication of the source IP address is a full representation of the IPv4 address.
3. The system of claim 1 , wherein:
the generated response IP address is an IPv6 address;
the source IP address of the requestor is an IPv6 address; and
the indication of the source IP address is a subset of bits of the IPv6 address of the source IP address.
4. The system of claim 1 , wherein the IP address subnet of the edge server is in a most significant set of bits of the generated response IP address and the requestor information is in a least significant set of bits of the generated response IP address.
5. The system of claim 1 , wherein the requestor is an intermediate Domain Name System (DNS) server.
6. The system of claim 1 , wherein determining the edge server of the CDN comprises evaluating a location associated with the requestor.
7. A method for embedding requestor information in a Domain Name System (DNS) resolution request, the method comprising:
receiving a request to resolve a hostname of a content distribution network (CDN), the request comprising a source Internet Protocol (IP) address of a requestor;
determining an edge server of the CDN, wherein the edge server is associated with an IP address subnet;
generating, based on the IP address subnet of the edge server, a response IP address comprising requestor information, the requestor information comprising an indication of the source IP address of the requestor, wherein the response IP address includes the IP address subnet of the edge server; and
providing a response to the request to resolve the hostname, wherein a payload of the response comprises the generated response IP address.
8. The method of claim 7 , wherein:
the generated response IP address is an IPv6 address;
the source IP address of the requestor is an IPv4 address; and
the indication of the source IP address is a full representation of the IPv4 address.
9. The method of claim 7 , wherein:
the generated response IP address is an IPv6 address;
the source IP address of the requestor is an IPv6 address; and
the indication of the source IP address is a subset of bits of the IPv6 address of the source IP address.
10. The method of claim 7 , wherein the IP address subnet of the edge server is in a most significant set of bits of the generated response IP address and the requestor information is in a least significant set of bits of the generated response IP address.
11. The method of claim 7 , wherein the requestor is an intermediate Domain Name System (DNS) server.
12. The method of claim 7 , wherein determining the edge server of the CDN comprises evaluating a location associated with the requestor.