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fix ApplicationSettings

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This commit is contained in:
Noste (Erwan) 2022-04-18 03:03:50 +02:00
parent 514195a7ac
commit fcaacdbbe7
1 changed files with 8 additions and 9 deletions
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17
u_tls_extensions.go
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@ -854,9 +854,9 @@ func (e *ApplicationSettingsExtension) writeToUConn(uc *UConn) error {
} }
func (e *ApplicationSettingsExtension) Len() int { func (e *ApplicationSettingsExtension) Len() int {
result := 7 result := 6 //id + first length + second length
for _, element := range e.SupportedALPNList { for _, element := range e.SupportedALPNList {
result += len(element) result += 1 + len(element) //byte for string length + allocation for string in bytes
} }
return result return result
} }
@ -868,22 +868,21 @@ func (e *ApplicationSettingsExtension) Read(b []byte) (int, error) {
b[0] = byte(extensionApplicationSettings >> 8) b[0] = byte(extensionApplicationSettings >> 8)
b[1] = byte(0x69) b[1] = byte(0x69)
b[2] = 0
b[4] = 0
currentIndex := 6 currentIndex := 6
for _, alpn := range e.SupportedALPNList { for _, alpn := range e.SupportedALPNList {
b[currentIndex] = byte(len(alpn)) b[currentIndex] = byte(len(alpn)) //set length of string in bytes
currentIndex++ currentIndex++
for _, char := range alpn { for _, char := range alpn {
b[currentIndex] = byte(char) b[currentIndex] = byte(char) //convert char to byte
currentIndex++ currentIndex++
} }
} }
b[3] = byte(currentIndex - 4) b[2] = 0x00
b[5] = byte(currentIndex - 6) b[3] = byte(e.Len() - 4) //len minus id and itself (2+2)
b[4] = 0x00
b[5] = byte(e.Len() - 6) //len minus id big length and itself 5 (2+2+2)
return e.Len(), io.EOF return e.Len(), io.EOF
} }