module OverSIP::SIP

  CRLF = "\r\n"
  DOUBLE_CRLF = "\r\n\r\n"

  # DOC: http://www.iana.org/assignments/sip-parameters
  REASON_PHARSE = {
    100 => "Trying",
    180 => "Ringing",
    181 => "Call Is Being Forwarded",
    182 => "Queued",
    183 => "Session Progress",
    199 => "Early Dialog Terminated",  # draft-ietf-sipcore-199
    200 => "OK",
    202 => "Accepted",  # RFC 3265
    204 => "No Notification",  #RFC 5839
    300 => "Multiple Choices",
    301 => "Moved Permanently",
    302 => "Moved Temporarily",
    305 => "Use Proxy",
    380 => "Alternative Service",
    400 => "Bad Request",
    401 => "Unauthorized",
    402 => "Payment Required",
    403 => "Forbidden",
    404 => "Not Found",
    405 => "Method Not Allowed",
    406 => "Not Acceptable",
    407 => "Proxy Authentication Required",
    408 => "Request Timeout",
    410 => "Gone",
    412 => "Conditional Request Failed",  # RFC 3903
    413 => "Request Entity Too Large",
    414 => "Request-URI Too Long",
    415 => "Unsupported Media Type",
    416 => "Unsupported URI Scheme",
    417 => "Unknown Resource-Priority",  # RFC 4412
    420 => "Bad Extension",
    421 => "Extension Required",
    422 => "Session Interval Too Small",  # RFC 4028
    423 => "Interval Too Brief",
    428 => "Use Identity Header",  # RFC 4474
    429 => "Provide Referrer Identity",  # RFC 3892
    430 => "Flow Failed",  # RFC 5626
    433 => "Anonymity Disallowed",  # RFC 5079
    436 => "Bad Identity-Info",  # RFC 4474
    437 => "Unsupported Certificate",  # RFC 4744
    438 => "Invalid Identity Header",  # RFC 4744
    439 => "First Hop Lacks Outbound Support",  # RFC 5626
    440 => "Max-Breadth Exceeded",  # RFC 5393
    469 => "Bad Info Package",  # draft-ietf-sipcore-info-events
    470 => "Consent Needed",  # RF C5360
    478 => "Unresolvable Destination",  # Custom code copied from Kamailio.
    480 => "Temporarily Unavailable",
    481 => "Call/Transaction Does Not Exist",
    482 => "Loop Detected",
    483 => "Too Many Hops",
    484 => "Address Incomplete",
    485 => "Ambiguous",
    486 => "Busy Here",
    487 => "Request Terminated",
    488 => "Not Acceptable Here",
    489 => "Bad Event",  # RFC 3265
    491 => "Request Pending",
    493 => "Undecipherable",
    494 => "Security Agreement Required",  # RFC 3329
    500 => "Server Internal Error",
    501 => "Not Implemented",
    502 => "Bad Gateway",
    503 => "Service Unavailable",
    504 => "Server Time-out",
    505 => "Version Not Supported",
    513 => "Message Too Large",
    580 => "Precondition Failure",  # RFC 3312
    600 => "Busy Everywhere",
    603 => "Decline",
    604 => "Does Not Exist Anywhere",
    606 => "Not Acceptable"
  }

  REASON_PHARSE_NOT_SET = "Reason Phrase Not Set"

  HDR_SERVER                  = "Server: #{::OverSIP::PROGRAM_NAME}/#{::OverSIP::VERSION}".freeze
  HDR_USER_AGENT              = "User-Agent: #{::OverSIP::PROGRAM_NAME}/#{::OverSIP::VERSION}".freeze
  HDR_ARRAY_CONTENT_LENGTH_0  = [ "0" ].freeze

end