def forward_incoming_req_pkt(ba_req, ba_len, host_host, host_port):
'''Forward incoming req packet to host.'''
req = packet.DataReq(ba_req)
if req.cek_valid() == False:
LOG.fatal("Bad DATA-REQ packet")
return
ses_id = req.get_sesid()
req_data = req.get_data()
#req_data = rewrite_req(req_data, host_host, host_port)
LOG.debug("ses_id=%d" % ses_id)
try:
h_conn = HOST_CONNS_DICT[ses_id]
LOG.debug("use old connection.ses_id = %d" % h_conn.ses_id)
except KeyError:
h_conn = HostConn(ses_id)
h_conn.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
_, err = mysock.connect(h_conn.sock, (host_host, host_port))
if err != None:
LOG.fatal("Connection to %s port %d failed." % (host_host, host_port))
LOG.fatal("Please check your local web server")
return LOCAL_STATUS_DOWN, ses_id
HOST_CONNS_DICT[ses_id] = h_conn
h_sock = h_conn.sock
written, err = mysock.send_all(h_sock, req_data)
if err != None:
print "error forward"
del HOST_CONNS_DICT[ses_id]
sys.exit(-1)
if written != len(req_data):
print "PARTIAL FORWARD to host"
print "FATAL UNHANDLED COND"
sys.exit(-1)
return LOCAL_STATUS_OK, ses_id
def client_loop(server, port, user, passwd, host_host, host_port):
"""Main client loop."""
#connect to server
server_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mysock.setkeepalives(server_sock)
ret, err = mysock.connect(server_sock, (server, port))
if err != None:
LOG.error("can't connect to server")
return
if do_auth(user, passwd, server_sock) == False:
sys.exit(1)
LOG.info("Authentication successfull")
client = Client(server_sock)
#start looping
while True:
#cek last_ping
client.cek_ping_req()
#server_sock select()
wsock = []
if client.any_pkt_to_server() or any_host_response():
wsock.append(server_sock)
to_read, to_write, _ = select.select([server_sock],
wsock, [], 1)
if len(to_read) > 0:
#read sock
ba_pkt, err = packet.get_all_data_pkt(server_sock)
if ba_pkt is None or err != None:
LOG.error("Connection to server closed")
break
#request packet
if ba_pkt[0] == packet.TYPE_DATA_REQ:
local_status, ses_id = forward_incoming_req_pkt(ba_pkt, len(ba_pkt), host_host, host_port)
if local_status == LOCAL_STATUS_DOWN:
client.send_ctrl_local_down(ses_id)
#ping rsp
elif ba_pkt[0] == packet.TYPE_PING_RSP:
#print "PING-RSP ", datetime.datetime.now()
client.handle_ping_rsp(ba_pkt)
#ctrl packet
elif ba_pkt[0] == packet.TYPE_CTRL:
LOG.debug("CTRL Packet. subtype = %d" % ba_pkt[1])
client.handle_ctrl_pkt(ba_pkt)
else:
LOG.error("Unknown packet.type = %d" % ba_pkt[0])
LOG.fatal("exiting...")
sys.exit(-1)
if len(to_write) > 0:
forward_host_rsp(server_sock)
if client.send_to_server_pkt() == False:
break
clean_host_conn()
#select() untuk host sock
rlist = []
for h_conn in HOST_CONNS_DICT.itervalues():
if h_conn.sock != None and h_conn.ended == False:
rlist.append(h_conn.sock)
if len(rlist) > 0:
h_read, _, _ = select.select(rlist, [], [], 0.5)
if len(h_read) > 0:
for sock in h_read:
accept_host_rsp(sock)
#cek ping rsp
if client.cek_ping_rsp() == False:
LOG.error("PING-RSP timeout")
break
LOG.error("Client disconnected")
