Mirror/zapret
1
0
Fork 0
mirror of https://github.com/bol-van/zapret.git synced 2025-12-31 11:55:55 +03:00
Code Issues Packages Projects Releases Wiki Activity

nfqws: packet delay support

Browse Source
This commit is contained in:
bol-van
2024-04-20 20:59:45 +03:00
parent 2e6ddc4756
commit 51c0d1ce3c
26 changed files with 975 additions and 527 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
nfq/protocol.c
View File

@@ -125,6 +125,20 @@ bool IsTLSClientHello(const uint8_t *data, size_t len, bool bPartialIsOK)
return len >= 6 && data[0] == 0x16 && data[1] == 0x03 && data[2] >= 0x01 && data[2] <= 0x03 && data[5] == 0x01 && (bPartialIsOK || TLSRecordLen(data) <= len);
}
size_t TLSHandshakeLen(const uint8_t *data)
{
return data[1] << 16 | data[2] << 8 | data[3]; // HandshakeProtocol length
}
bool IsTLSHandshakeClientHello(const uint8_t *data, size_t len)
{
return len>=4 && data[0]==0x01;
}
bool IsTLSHandshakeFull(const uint8_t *data, size_t len)
{
return (4+TLSHandshakeLen(data))<=len;
}
// bPartialIsOK=true - accept partial packets not containing the whole TLS message
bool TLSFindExtInHandshake(const uint8_t *data, size_t len, uint16_t type, const uint8_t **ext, size_t *len_ext, bool bPartialIsOK)
{
@@ -143,14 +157,11 @@ bool TLSFindExtInHandshake(const uint8_t *data, size_t len, uint16_t type, const
size_t l, ll;
if (!bPartialIsOK && !IsTLSHandshakeFull(data,len)) return false;
l = 1 + 3 + 2 + 32;
// SessionIDLength
if (len < (l + 1)) return false;
if (!bPartialIsOK)
{
ll = data[1] << 16 | data[2] << 8 | data[3]; // HandshakeProtocol length
if (len < (ll + 4)) return false;
}
l += data[l] + 1;
// CipherSuitesLength
if (len < (l + 2)) return false;
@@ -276,7 +287,7 @@ bool IsQUICCryptoHello(const uint8_t *data, size_t len, size_t *hello_offset, si
// offset must be 0 if it's a full segment, not just a chunk
if (coff || (offset+tvb_get_size(data[offset])) >= len) return false;
offset += tvb_get_varint(data + offset, &clen);
if (data[offset] != 0x01 || (offset + clen) > len) return false;
if ((offset + clen) > len || !IsTLSHandshakeClientHello(data+offset,clen)) return false;
if (hello_offset) *hello_offset = offset;
if (hello_len) *hello_len = (size_t)clen;
return true;