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in_session.go
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in_session.go
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package quickfix
import (
"bytes"
"time"
"github.com/NaNuNaNu/quickfix/internal"
)
type inSession struct{ loggedOn }
func (state inSession) String() string { return "In Session" }
func (state inSession) FixMsgIn(session *session, msg *Message) sessionState {
msgType, err := msg.Header.GetBytes(tagMsgType)
if err != nil {
return handleStateError(session, err)
}
switch {
case bytes.Equal(msgTypeLogon, msgType):
if err := session.handleLogon(msg); err != nil {
if err := session.initiateLogoutInReplyTo("", msg); err != nil {
return handleStateError(session, err)
}
return logoutState{}
}
return state
case bytes.Equal(msgTypeLogout, msgType):
return state.handleLogout(session, msg)
case bytes.Equal(msgTypeResendRequest, msgType):
return state.handleResendRequest(session, msg)
case bytes.Equal(msgTypeSequenceReset, msgType):
return state.handleSequenceReset(session, msg)
case bytes.Equal(msgTypeTestRequest, msgType):
return state.handleTestRequest(session, msg)
default:
if err := session.verify(msg); err != nil {
return state.processReject(session, msg, err)
}
}
if err := session.store.IncrNextTargetMsgSeqNum(); err != nil {
return handleStateError(session, err)
}
return state
}
func (state inSession) Timeout(session *session, event internal.Event) (nextState sessionState) {
switch event {
case internal.NeedHeartbeat:
heartBt := NewMessage()
heartBt.Header.SetField(tagMsgType, FIXString("0"))
if err := session.send(heartBt); err != nil {
return handleStateError(session, err)
}
case internal.PeerTimeout:
testReq := NewMessage()
testReq.Header.SetField(tagMsgType, FIXString("1"))
testReq.Body.SetField(tagTestReqID, FIXString("TEST"))
if err := session.send(testReq); err != nil {
return handleStateError(session, err)
}
session.log.OnEvent("Sent test request TEST")
session.peerTimer.Reset(time.Duration(float64(1.2) * float64(session.HeartBtInt)))
return pendingTimeout{state}
}
return state
}
func (state inSession) handleLogout(session *session, msg *Message) (nextState sessionState) {
if err := session.verifySelect(msg, false, false); err != nil {
return state.processReject(session, msg, err)
}
if session.IsLoggedOn() {
session.log.OnEvent("Received logout request")
session.log.OnEvent("Sending logout response")
if err := session.sendLogoutInReplyTo("", msg); err != nil {
session.logError(err)
}
} else {
session.log.OnEvent("Received logout response")
}
if err := session.store.IncrNextTargetMsgSeqNum(); err != nil {
session.logError(err)
}
if session.ResetOnLogout {
if err := session.dropAndReset(); err != nil {
session.logError(err)
}
}
return latentState{}
}
func (state inSession) handleTestRequest(session *session, msg *Message) (nextState sessionState) {
if err := session.verify(msg); err != nil {
return state.processReject(session, msg, err)
}
var testReq FIXString
if err := msg.Body.GetField(tagTestReqID, &testReq); err != nil {
session.log.OnEvent("Test Request with no testRequestID")
} else {
heartBt := NewMessage()
heartBt.Header.SetField(tagMsgType, FIXString("0"))
heartBt.Body.SetField(tagTestReqID, testReq)
if err := session.sendInReplyTo(heartBt, msg); err != nil {
return handleStateError(session, err)
}
}
if err := session.store.IncrNextTargetMsgSeqNum(); err != nil {
return handleStateError(session, err)
}
return state
}
func (state inSession) handleSequenceReset(session *session, msg *Message) (nextState sessionState) {
var gapFillFlag FIXBoolean
if msg.Body.Has(tagGapFillFlag) {
if err := msg.Body.GetField(tagGapFillFlag, &gapFillFlag); err != nil {
return state.processReject(session, msg, err)
}
}
if err := session.verifySelect(msg, bool(gapFillFlag), bool(gapFillFlag)); err != nil {
return state.processReject(session, msg, err)
}
var newSeqNo FIXInt
if err := msg.Body.GetField(tagNewSeqNo, &newSeqNo); err == nil {
expectedSeqNum := FIXInt(session.store.NextTargetMsgSeqNum())
session.log.OnEventf("Received SequenceReset FROM: %v TO: %v", expectedSeqNum, newSeqNo)
switch {
case newSeqNo > expectedSeqNum:
if err := session.store.SetNextTargetMsgSeqNum(int(newSeqNo)); err != nil {
return handleStateError(session, err)
}
case newSeqNo < expectedSeqNum:
//FIXME: to be compliant with legacy tests, do not include tag in reftagid? (11c_NewSeqNoLess)
if err := session.doReject(msg, valueIsIncorrectNoTag()); err != nil {
return handleStateError(session, err)
}
}
}
return state
}
func (state inSession) handleResendRequest(session *session, msg *Message) (nextState sessionState) {
if err := session.verifyIgnoreSeqNumTooHighOrLow(msg); err != nil {
return state.processReject(session, msg, err)
}
var err error
var beginSeqNoField FIXInt
if err = msg.Body.GetField(tagBeginSeqNo, &beginSeqNoField); err != nil {
return state.processReject(session, msg, RequiredTagMissing(tagBeginSeqNo))
}
beginSeqNo := beginSeqNoField
var endSeqNoField FIXInt
if err = msg.Body.GetField(tagEndSeqNo, &endSeqNoField); err != nil {
return state.processReject(session, msg, RequiredTagMissing(tagEndSeqNo))
}
endSeqNo := int(endSeqNoField)
session.log.OnEventf("Received ResendRequest FROM: %d TO: %d", beginSeqNo, endSeqNo)
expectedSeqNum := session.store.NextSenderMsgSeqNum()
if (session.sessionID.BeginString >= BeginStringFIX42 && endSeqNo == 0) ||
(session.sessionID.BeginString <= BeginStringFIX42 && endSeqNo == 999999) ||
(endSeqNo >= expectedSeqNum) {
endSeqNo = expectedSeqNum - 1
}
if err := state.resendMessages(session, int(beginSeqNo), endSeqNo, *msg); err != nil {
return handleStateError(session, err)
}
if err := session.checkTargetTooLow(msg); err != nil {
return state
}
if err := session.checkTargetTooHigh(msg); err != nil {
return state
}
if err := session.store.IncrNextTargetMsgSeqNum(); err != nil {
return handleStateError(session, err)
}
return state
}
func (state inSession) resendMessages(session *session, beginSeqNo, endSeqNo int, inReplyTo Message) (err error) {
if session.DisableMessagePersist {
err = state.generateSequenceReset(session, beginSeqNo, endSeqNo+1, inReplyTo)
return
}
msgs, err := session.store.GetMessages(beginSeqNo, endSeqNo)
if err != nil {
session.log.OnEventf("error retrieving messages from store: %s", err.Error())
return
}
seqNum := beginSeqNo
nextSeqNum := seqNum
msg := NewMessage()
for _, msgBytes := range msgs {
_ = ParseMessageWithDataDictionary(msg, bytes.NewBuffer(msgBytes), session.transportDataDictionary, session.appDataDictionary)
msgType, _ := msg.Header.GetBytes(tagMsgType)
sentMessageSeqNum, _ := msg.Header.GetInt(tagMsgSeqNum)
if isAdminMessageType(msgType) {
nextSeqNum = sentMessageSeqNum + 1
continue
}
if !session.resend(msg) {
nextSeqNum = sentMessageSeqNum + 1
continue
}
if seqNum != sentMessageSeqNum {
if err = state.generateSequenceReset(session, seqNum, sentMessageSeqNum, inReplyTo); err != nil {
return err
}
}
session.log.OnEventf("Resending Message: %v", sentMessageSeqNum)
msgBytes = msg.build()
session.sendBytes(msgBytes)
seqNum = sentMessageSeqNum + 1
nextSeqNum = seqNum
}
if seqNum != nextSeqNum { // gapfill for catch-up
if err = state.generateSequenceReset(session, seqNum, nextSeqNum, inReplyTo); err != nil {
return err
}
}
return
}
func (state inSession) processReject(session *session, msg *Message, rej MessageRejectError) sessionState {
switch TypedError := rej.(type) {
case targetTooHigh:
var nextState resendState
switch currentState := session.State.(type) {
case resendState:
//assumes target too high reject already sent
nextState = currentState
default:
var err error
if nextState, err = session.doTargetTooHigh(TypedError); err != nil {
return handleStateError(session, err)
}
}
if nextState.messageStash == nil {
nextState.messageStash = make(map[int]*Message)
}
nextState.messageStash[TypedError.ReceivedTarget] = msg
//do not reclaim stashed message
msg.keepMessage = true
return nextState
case targetTooLow:
return state.doTargetTooLow(session, msg, TypedError)
case incorrectBeginString:
if err := session.initiateLogout(rej.Error()); err != nil {
return handleStateError(session, err)
}
return logoutState{}
}
switch rej.RejectReason() {
case rejectReasonCompIDProblem, rejectReasonSendingTimeAccuracyProblem:
if err := session.doReject(msg, rej); err != nil {
return handleStateError(session, err)
}
if err := session.initiateLogout(""); err != nil {
return handleStateError(session, err)
}
return logoutState{}
default:
if err := session.doReject(msg, rej); err != nil {
return handleStateError(session, err)
}
if err := session.store.IncrNextTargetMsgSeqNum(); err != nil {
return handleStateError(session, err)
}
return state
}
}
func (state inSession) doTargetTooLow(session *session, msg *Message, rej targetTooLow) (nextState sessionState) {
var posDupFlag FIXBoolean
if msg.Header.Has(tagPossDupFlag) {
if err := msg.Header.GetField(tagPossDupFlag, &posDupFlag); err != nil {
if rejErr := session.doReject(msg, err); rejErr != nil {
return handleStateError(session, rejErr)
}
return state
}
}
if !posDupFlag.Bool() {
if err := session.initiateLogout(rej.Error()); err != nil {
return handleStateError(session, err)
}
return logoutState{}
}
if !msg.Header.Has(tagOrigSendingTime) {
if err := session.doReject(msg, RequiredTagMissing(tagOrigSendingTime)); err != nil {
return handleStateError(session, err)
}
return state
}
var origSendingTime FIXUTCTimestamp
if err := msg.Header.GetField(tagOrigSendingTime, &origSendingTime); err != nil {
if rejErr := session.doReject(msg, err); rejErr != nil {
return handleStateError(session, rejErr)
}
return state
}
sendingTime := new(FIXUTCTimestamp)
if err := msg.Header.GetField(tagSendingTime, sendingTime); err != nil {
return state.processReject(session, msg, err)
}
if sendingTime.Before(origSendingTime.Time) {
if err := session.doReject(msg, sendingTimeAccuracyProblem()); err != nil {
return handleStateError(session, err)
}
if err := session.initiateLogout(""); err != nil {
return handleStateError(session, err)
}
return logoutState{}
}
return state
}
func (state *inSession) generateSequenceReset(session *session, beginSeqNo int, endSeqNo int, inReplyTo Message) (err error) {
sequenceReset := NewMessage()
session.fillDefaultHeader(sequenceReset, &inReplyTo)
sequenceReset.Header.SetField(tagMsgType, FIXString("4"))
sequenceReset.Header.SetField(tagMsgSeqNum, FIXInt(beginSeqNo))
sequenceReset.Header.SetField(tagPossDupFlag, FIXBoolean(true))
sequenceReset.Body.SetField(tagNewSeqNo, FIXInt(endSeqNo))
sequenceReset.Body.SetField(tagGapFillFlag, FIXBoolean(true))
var origSendingTime FIXString
if err := sequenceReset.Header.GetField(tagSendingTime, &origSendingTime); err == nil {
sequenceReset.Header.SetField(tagOrigSendingTime, origSendingTime)
}
session.application.ToAdmin(sequenceReset, session.sessionID)
msgBytes := sequenceReset.build()
session.sendBytes(msgBytes)
session.log.OnEventf("Sent SequenceReset TO: %v", endSeqNo)
return
}