Equal Cost Multi-path Routing

[fujiapple852]

Tracking issue for all Equal Cost Multi-path Routing work items.

We wish to support the following multi-path strategies:

• Classic (traceroute and MTR)
  • Set the sequence number in either the src or dest port number
• Paris (see here)
  • Use the IPv4 checksum field to store the sequence and manipulate the UDP payload to ensure a valid packet
• Dublin (see here)
  • Use the IPv4 identifier field to store the sequence number
  • Manipulate the IPv6 Payload Length to store the sequence number

We wish to support these for IPv4 & IPv6 for both UDP and TCP protocols.

Current support:

Strategy	Family	Protocol	Status
Classic	IPv4 / IPv6	UDP / TCP	✅
Paris	IPv4	UDP	✅
Paris	IPv6	UDP	✅
Dublin	IPv4	UDP	✅
Dublin	IPv6	UDP	✅
Paris	IPv4	TCP	❌
Paris	IPv6	TCP	❌
Dublin	IPv4	TCP	❌
Dublin	IPv6	TCP	❌

Tasks

• [x] https://github.com/fujiapple852/trippy/issues/158
• [x] https://github.com/fujiapple852/trippy/issues/542
• [x] https://github.com/fujiapple852/trippy/issues/272
• [x] https://github.com/fujiapple852/trippy/issues/749
• [ ] #1104