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Add TLS Hello Fragmentation for freedom outbound (#2131)

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* Replace TCP Segmentation with TLS Hello Fragmentation

* Update infra/conf/freedom.go

* Refine proxy/freedom/freedom.go

---------

Co-authored-by: RPRX <63339210+RPRX@users.noreply.github.com>
This commit is contained in:
rrouzbeh 2023-06-18 07:12:42 -07:00 • committed by yuhan6665
parent def5807c64
commit 9122d0f056
2 changed files with 98 additions and 15 deletions
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15
infra/conf/freedom.go
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@ -90,7 +90,17 @@ func (c *FreedomConfig) Build() (proto.Message, error) {
MaxLength: int32(maxLength),
}
if len(c.Fragment.Packets) > 0 {
switch strings.ToLower(c.Fragment.Packets) {
case "tlshello":
// TLS Hello Fragmentation (into multiple handshake messages)
config.Fragment.StartPacket = 0
config.Fragment.EndPacket = 1
case "":
// TCP Segmentation (all packets)
config.Fragment.StartPacket = 0
config.Fragment.EndPacket = 0
default:
// TCP Segmentation (range)
packetRange := strings.Split(c.Fragment.Packets, "-")
var startPacket, endPacket int64
if len(packetRange) == 2 {
@ -114,9 +124,6 @@ func (c *FreedomConfig) Build() (proto.Message, error) {
}
config.Fragment.StartPacket = int32(startPacket)
config.Fragment.EndPacket = int32(endPacket)
} else {
config.Fragment.StartPacket = 0
config.Fragment.EndPacket = 0
}
}