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fix data length range

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破娃酱 2017-04-09 18:27:13 +08:00
parent a3a8ed996c
commit 2b64802fed
1 changed files with 4 additions and 3 deletions
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7
shadowsocks/obfsplugin/auth.py
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@ -1212,12 +1212,13 @@ class auth_aes128_sha1(auth_base):
def rnd_data_len(self, buf_size, full_buf_size): def rnd_data_len(self, buf_size, full_buf_size):
if full_buf_size >= self.server_info.buffer_size: if full_buf_size >= self.server_info.buffer_size:
return 0 return 0
rev_len = self.server_info.tcp_mss - buf_size - 9 tcp_mss = self.server_info.tcp_mss if self.server_info.tcp_mss < 4096 else 4096
rev_len = tcp_mss - buf_size - 9
if rev_len == 0: if rev_len == 0:
return 0 return 0
if rev_len < 0: if rev_len < 0:
if rev_len > -self.server_info.tcp_mss: if rev_len > -tcp_mss:
return self.trapezoid_random_int(rev_len + self.server_info.tcp_mss, -0.3) return self.trapezoid_random_int(rev_len + tcp_mss, -0.3)
return common.ord(os.urandom(1)[0]) % 32 return common.ord(os.urandom(1)[0]) % 32
if buf_size > 900: if buf_size > 900:
return struct.unpack('>H', os.urandom(2))[0] % rev_len return struct.unpack('>H', os.urandom(2))[0] % rev_len