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calculate SSU2 session MTU and max payload size

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orignal
2022-07-13 19:35:18 -04:00
parent 1dd2bd0013
commit 3394bb4b8d
4 changed files with 97 additions and 75 deletions
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5
libi2pd/SSUData.h
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@@ -19,17 +19,14 @@
#include "I2NPProtocol.h"
#include "Identity.h"
#include "RouterInfo.h"
#include "TransportSession.h"
namespace i2p
{
namespace transport
{
const size_t SSU_MTU_V4 = 1484;
const size_t SSU_MTU_V6 = 1488;
const size_t IPV4_HEADER_SIZE = 20;
const size_t IPV6_HEADER_SIZE = 40;
const size_t UDP_HEADER_SIZE = 8;
const size_t SSU_V4_MAX_PACKET_SIZE = SSU_MTU_V4 - IPV4_HEADER_SIZE - UDP_HEADER_SIZE; // 1456
const size_t SSU_V6_MAX_PACKET_SIZE = SSU_MTU_V6 - IPV6_HEADER_SIZE - UDP_HEADER_SIZE; // 1440
const int RESEND_INTERVAL = 3; // in seconds