def drain():
global window_conn
global window_stream
global conn
global global_stream_id
global tosend_by_stream
for stream_id in tosend_by_stream:
tosend = tosend_by_stream[stream_id]
while not tosend.empty() and window_conn and window_stream[stream_id]:
max_cur_frame = min(max_frame, window_conn,
window_stream[stream_id])
datablock = http2.encode_next_data(stream_id, tosend, 1,
max_cur_frame)
conn.sendall(http2.encode_frame(datablock))
window_conn -= len(datablock.payload)
window_stream[stream_id] -= len(datablock.payload)
import socket
import base64
import http11
import http2
domain = "www.google.fi"
hdrs = ""
hdrs += "GET / HTTP/1.1\r\n"
hdrs += "Host: " + domain + "\r\n"
hdrs += "Connection: Upgrade, HTTP2-Settings\r\n"
hdrs += "Upgrade: h2c\r\n"
settings = http2.encode_frame(http2.encode_settings([], 0))
settings = base64.urlsafe_b64encode(settings)
settings = settings.replace('=', '')
hdrs += "HTTP2-Settings: " + settings + "\r\n"
hdrs += "\r\n"
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((domain, 80))
s.send(hdrs)
data = ""
while True:
data += s.recv(1024)
if not data:
break
if '\r\n\r\n' in data:
print data
break
head = data[:data.find('\r\n\r\n')]
| ssl.OP_NO_TLSv1_1)
conn = context.wrap_socket(socket.socket(socket.AF_INET),
server_hostname=hostname)
conn.connect((hostname, port))
print(conn.selected_alpn_protocol())
conn.sendall(
b'\x50\x52\x49\x20\x2a\x20\x48\x54\x54\x50\x2f\x32\x2e\x30\x0d\x0a\x0d\x0a\x53\x4d\x0d\x0a\x0d\x0a'
) # MAGIC
settings = http2.encode_frame(
http2.encode_settings(
[
http2.setting_header_table_size(8192),
http2.setting_enable_push(1),
http2.setting_max_concurrent_streams(10),
http2.setting_initial_window_size(65535),
#http2.setting_initial_window_size(1),
http2.setting_max_frame_size(16384),
http2.setting_max_header_list_size(65536),
],
0))
conn.sendall(settings)
#conn.sendall(b'\x50\x52\x49\x20\x2a\x20\x48\x54\x54\x50\x2f\x32\x2e\x30\x0d\x0a\x0d\x0a\x53\x4d\x0d\x0a\x0d\x0a' + settings) # MAGIC
b = http2.recv_frame(conn)
settings_srv = http2.decode_any(b)
if type(settings_srv) != http2.frame_settings:
assert False
hdrsz = 4096
max_frame = 16384
from scapy.all import *
import http2
import hpack
pkts=[]
seq=1
def send(x):
global seq
pkts.append(Ether() / IP() / TCP(flags='A',seq=seq,sport=12345,dport=80) / x)
seq += len(x)
send(b'\x50\x52\x49\x20\x2a\x20\x48\x54\x54\x50\x2f\x32\x2e\x30\x0d\x0a\x0d\x0a\x53\x4d\x0d\x0a\x0d\x0a')
settings = http2.encode_frame(http2.encode_settings([], 0))
send(settings)
hdrs = hpack.encodehdrs([
(':method', 'GET'),
(':scheme', 'https'),
(':path', '/'),
('host', 'www.google.fi'),
('accept', 'text/html'),
], hpack.hdrtbl())
end_stream = 1
send(http2.encode_frame(http2.encode_headers(1, 0, 0, 0, hdrs, end_stream, 0, 16384)[0]))
wrpcap('http2.pcap', pkts)
#
conn = context.wrap_socket(tcp_conn, server_side=True)
print(conn.selected_alpn_protocol())
try:
data = http2.recvall(
conn,
len(b'\x50\x52\x49\x20\x2a\x20\x48\x54\x54\x50\x2f\x32\x2e\x30\x0d\x0a\x0d\x0a\x53\x4d\x0d\x0a\x0d\x0a'
))
if data != b'\x50\x52\x49\x20\x2a\x20\x48\x54\x54\x50\x2f\x32\x2e\x30\x0d\x0a\x0d\x0a\x53\x4d\x0d\x0a\x0d\x0a':
assert False
except ssl.SSLError:
continue
settings = http2.encode_frame(
http2.encode_settings([
http2.setting_header_table_size(8192),
], 0))
conn.sendall(settings)
hdrtbl = hpack.hdrtbl()
enctbl = hpack.hdrtbl()
hdrsz = 4096
print "LOOP"
while True:
b = http2.recv_frame(conn)
if len(b) == 0:
break
a = http2.decode_any(b)
if type(a) == http2.frame_push_promise: