package multiaddr

type Protocol struct {
  Code int
  Size int
  Name string
}

// replicating table here to:
// 1. avoid parsing the csv
// 2. ensuring errors in the csv don't screw up code.
// 3. changing a number has to happen in two places.

var Protocols = []Protocol{
  Protocol{4,  32,  "ip4"},
  Protocol{6,  16,  "tcp"},
  Protocol{17, 16,  "udp"},
  Protocol{33, 16,  "dccp"},
  Protocol{41, 128, "ip6"},
  // these require varint:
  Protocol{132, 16, "sctp"},
  // {480, 0, "http"},
  // {443, 0, "https"},
}

func ProtocolWithName(s string) *Protocol {
  for _, p := range(Protocols) {
    if p.Name == s {
      return &p
    }
  }
  return nil
}

func ProtocolWithCode(c int) *Protocol {
  for _, p := range(Protocols) {
    if p.Code == c {
      return &p
    }
  }
  return nil
}