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Feat: Add tracing data to prelogin and login7 packets (#228)
* add traceid field to prelogin * add clientid and pid to login7 * add logging of conn id to tdsSession * fix go mod * fix test * update min Go to 118 Fixes #226
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| package mssql | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "github.com/google/uuid" | ||
| "github.com/microsoft/go-mssqldb/aecmk" | ||
| "github.com/microsoft/go-mssqldb/msdsn" | ||
| ) | ||
|
|
||
| func newSession(outbuf *tdsBuffer, logger ContextLogger, p msdsn.Config) *tdsSession { | ||
| sess := &tdsSession{ | ||
| buf: outbuf, | ||
| logger: logger, | ||
| logFlags: uint64(p.LogFlags), | ||
| aeSettings: &alwaysEncryptedSettings{keyProviders: aecmk.GetGlobalCekProviders()}, | ||
| } | ||
| _ = sess.activityid.Scan(p.ActivityID) | ||
| // generating a guid has a small chance of failure. Make a best effort | ||
| connid, cerr := uuid.NewRandom() | ||
| if cerr == nil { | ||
| _ = sess.connid.Scan(connid[:]) | ||
| } | ||
|
|
||
| return sess | ||
| } | ||
|
|
||
| func (s *tdsSession) preparePreloginFields(ctx context.Context, p msdsn.Config, fe *featureExtFedAuth) map[uint8][]byte { | ||
| instance_buf := []byte(p.Instance) | ||
| instance_buf = append(instance_buf, 0) // zero terminate instance name | ||
|
|
||
| var encrypt byte | ||
| switch p.Encryption { | ||
| default: | ||
| panic(fmt.Errorf("Unsupported Encryption Config %v", p.Encryption)) | ||
| case msdsn.EncryptionDisabled: | ||
| encrypt = encryptNotSup | ||
| case msdsn.EncryptionRequired: | ||
| encrypt = encryptOn | ||
| case msdsn.EncryptionOff: | ||
| encrypt = encryptOff | ||
| case msdsn.EncryptionStrict: | ||
| encrypt = encryptStrict | ||
| } | ||
| v := getDriverVersion(driverVersion) | ||
| fields := map[uint8][]byte{ | ||
| // 4 bytes for version and 2 bytes for minor version | ||
| preloginVERSION: {byte(v), byte(v >> 8), byte(v >> 16), byte(v >> 24), 0, 0}, | ||
| preloginENCRYPTION: {encrypt}, | ||
| preloginINSTOPT: instance_buf, | ||
| preloginTHREADID: {0, 0, 0, 0}, | ||
| preloginMARS: {0}, // MARS disabled | ||
| } | ||
|
|
||
| if !p.NoTraceID { | ||
| traceID := make([]byte, 36) // 16 byte connection id + 16 byte activity id + 4 byte sequence number | ||
| connid, _ := s.connid.Value() | ||
| activityid, _ := s.activityid.Value() | ||
| _ = copy(traceID[:16], connid.([]byte)) | ||
| _ = copy(traceID[16:32], activityid.([]byte)) | ||
| fields[preloginTRACEID] = traceID | ||
| if (s.logFlags)&logDebug != 0 { | ||
| msg := fmt.Sprintf("Creating prelogin packet with connection id '%s' and activity id '%s'", s.connid, s.activityid) | ||
| s.logger.Log(ctx, msdsn.LogDebug, msg) | ||
| } | ||
| } | ||
| if fe.FedAuthLibrary != FedAuthLibraryReserved { | ||
| fields[preloginFEDAUTHREQUIRED] = []byte{1} | ||
| } | ||
|
|
||
| return fields | ||
| } | ||
|
|
||
| type logFunc func() string | ||
|
|
||
| func (s *tdsSession) logPrefix() string { | ||
| if s.logFlags&uint64(msdsn.LogSessionIDs) != 0 { | ||
| return fmt.Sprintf("aid:%v cid:%v - ", s.activityid, s.connid) | ||
| } | ||
| return "" | ||
| } | ||
|
|
||
| func (s *tdsSession) LogS(ctx context.Context, category msdsn.Log, msg string) { | ||
| s.Log(ctx, category, func() string { return msg }) | ||
| } | ||
|
|
||
| // Log checks that the session logFlags includes the category before evaluating the logFunc and emitting the trace | ||
| func (s *tdsSession) Log(ctx context.Context, category msdsn.Log, logFunc logFunc) { | ||
| if s.logFlags&uint64(category) != 0 { | ||
| s.logger.Log(ctx, category, s.logPrefix()+logFunc()) | ||
| } | ||
| } | ||
|
|
||
| // LogF checks that the session logFlags includes the category before calling fmt.Sprintf and emitting the trace | ||
| func (s *tdsSession) LogF(ctx context.Context, category msdsn.Log, format string, a ...any) { | ||
| if s.logFlags&uint64(category) != 0 { | ||
| s.logger.Log(ctx, category, s.logPrefix()+fmt.Sprintf(format, a...)) | ||
| } | ||
| } |
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