def recvmessages():
# let's wait for packets here...
lind_test_server.bind_syscall(listensockfd,'127.0.0.1',50102)
assert lind_test_server.recv_syscall(listensockfd,10000,0) == 'test',\
"UDP recv test 1 failed."
lind_test_server.recv_syscall(listensockfd,10000,0) == 'test2',\
"UDP recv test 2 failed."
def helper(): msg = None msg = lind_test_server.recv_syscall(sockets[0], 1024, 0) assert msg != None, "Sockpair recv failed in helper..." lind_test_server.send_syscall(sockets[0], "SocketPair test.", 0) return
def helper():
msg = None
msg = lind_test_server.recv_syscall(sockets[0], 1024, 0)
assert msg != None, "Sockpair recv failed in helper..."
lind_test_server.send_syscall(sockets[0], "SocketPair test.", 0)
return
def process_request():
"""
<Purpose>
Server thread for processing connections using select ...
"""
while True:
#Pass list of Inputs, Outputs for select which returns if any activity
#occurs on any socket.
ret = lind_test_server.select_syscall(11, inputs, outputs, excepts, 5)
#Check for any activity in any of the Input sockets...
for sock in ret[1]:
#If the socket returned was listerner socket, then there's a new conn.
#so we accept it, and put the client socket in the list of Inputs.
if sock is serversockfd:
newsockfd = lind_test_server.accept_syscall(sock)
inputs.append(newsockfd[2])
#Write to a file...
elif sock is filefd:
emultimer.sleep(1)
assert lind_test_server.write_syscall(sock, 'test') == 4, \
"Failed to write into a file..."
lind_test_server.lseek_syscall(sock, 0, SEEK_SET)
inputs.remove(sock)
#If the socket is in established conn., then we recv the data, if
#there's no data, then close the client socket.
else:
data = lind_test_server.recv_syscall(sock, 100, 0)
if data:
assert data == "test", "Recv failed in select..."
#We make the ouput ready, so that it sends out data...
if sock not in outputs:
outputs.append(sock)
else:
#No data means remote socket closed, hence close the client socket
#in server, also remove this socket from readfd's.
lind_test_server.close_syscall(sock)
inputs.remove(sock)
#Check for any activity in any of the output sockets...
for sock in ret[2]:
if sock is filefd:
assert lind_test_server.read_syscall(sock, 4) == "test", \
"Failed to read from a file..."
#test for file finished, remove from monitoring.
outputs.remove(sock)
else:
lind_test_server.send_syscall(sock, data, 0)
#Data is sent out this socket, it's no longer ready for writing
#remove this socket from writefd's.
outputs.remove(sock)
lind_test_server.close_syscall(serversockfd)
def process_request():
"""
<Purpose>
Server thread for processing connections using select ...
"""
while True:
#Pass list of Inputs, Outputs for select which returns if any activity
#occurs on any socket.
ret = lind_test_server.select_syscall(11, inputs, outputs, excepts, 5)
#Check for any activity in any of the Input sockets...
for sock in ret[1]:
#If the socket returned was listerner socket, then there's a new conn.
#so we accept it, and put the client socket in the list of Inputs.
if sock is serversockfd:
newsockfd = lind_test_server.accept_syscall(sock)
inputs.append(newsockfd[2])
#Write to a file...
elif sock is filefd:
emultimer.sleep(1)
assert lind_test_server.write_syscall(sock, 'test') == 4, \
"Failed to write into a file..."
lind_test_server.lseek_syscall(sock, 0, SEEK_SET)
inputs.remove(sock)
#If the socket is in established conn., then we recv the data, if
#there's no data, then close the client socket.
else:
data = lind_test_server.recv_syscall(sock, 100, 0)
if data:
assert data == "test", "Recv failed in select..."
#We make the ouput ready, so that it sends out data...
if sock not in outputs:
outputs.append(sock)
else:
#No data means remote socket closed, hence close the client socket
#in server, also remove this socket from readfd's.
lind_test_server.close_syscall(sock)
inputs.remove(sock)
#Check for any activity in any of the output sockets...
for sock in ret[2]:
if sock is filefd:
assert lind_test_server.read_syscall(sock, 4) == "test", \
"Failed to read from a file..."
#test for file finished, remove from monitoring.
outputs.remove(sock)
else:
lind_test_server.send_syscall(sock, data, 0)
#Data is sent out this socket, it's no longer ready for writing
#remove this socket from writefd's.
outputs.remove(sock)
lind_test_server.close_syscall(serversockfd)
def client1():
"""
<Purpose>
Thread for client 1 to connect to server, and send/recv data...
"""
lind_test_server.connect_syscall(clientsockfd, '127.0.0.1', 50300)
lind_test_server.send_syscall(clientsockfd, "test", 0)
#Short sleeps are not working, give enough time...
emultimer.sleep(1)
assert lind_test_server.recv_syscall(clientsockfd, 100, 0) == "test", \
"Write failed in select while processing client 1..."
lind_test_server.close_syscall(clientsockfd)
def tester(): # need simultaneous communication... emultimer.createthread(helper) emultimer.sleep(0.1) lind_test_server.send_syscall(sockets[1], "SocketPair test.", 0) msg = None msg = lind_test_server.recv_syscall(sockets[1], 1024, 0) assert msg != None, "Sockpair recv failed in tester..." emultimer.sleep(0.1) lind_test_server.close_syscall(sockets[1]) lind_test_server.close_syscall(sockets[0]) return
def tester():
# need simultaneous communication...
emultimer.createthread(helper)
emultimer.sleep(0.1)
lind_test_server.send_syscall(sockets[1], "SocketPair test.", 0)
msg = None
msg = lind_test_server.recv_syscall(sockets[1], 1024, 0)
assert msg != None, "Sockpair recv failed in tester..."
emultimer.sleep(0.1)
lind_test_server.close_syscall(sockets[1])
lind_test_server.close_syscall(sockets[0])
return
def process_request():
"""
<Purpose>
Server thread for processing connections using poll ...
"""
while True:
#Pass list of sockets that needs for polling which returns if any activity
#occurs on any socket.
poll_vals = lind_test_server.poll_syscall(polled, 5)
ret = [poll_vals[0],[],[],[]]
ret[1] = [x['fd'] for x in poll_vals[1] if x['revents'] & lind_test_server.POLLIN]
ret[2] = [x['fd'] for x in poll_vals[1] if x['revents'] & lind_test_server.POLLOUT]
#Check for any activity in any of the Input sockets...
for sock in ret[1]:
#If the socket returned was listerner socket, then there's a new conn.
#so we accept it, and put the client socket in the list of Inputs.
if sock is serversockfd:
newsockfd = lind_test_server.accept_syscall(sock)
new_poll = {'fd':newsockfd[2], 'events':lind_test_server.POLLIN, 'revents':0}
polled.append(new_poll)
#Write to a file...
elif sock is filefd:
assert lind_test_server.write_syscall(sock, 'test') == 4, \
"Failed to write into a file..."
lind_test_server.lseek_syscall(sock, 0, SEEK_SET)
#Once the write is successful into a file, Modify the file descriptor
#so that its ready for reading out of the file.
[x for x in polled if x['fd'] == sock][0]['events'] = \
lind_test_server.POLLOUT
#If the socket is in established conn., then we recv the data, if
#there's no data, then close the client socket.
else:
data = lind_test_server.recv_syscall(sock, 100, 0)
if data:
assert data == "test", "Recv failed in select..."
#This socket is ready for writing, modify the socket descriptor
#to be in read-write mode. This socket can write data out to network
[x for x in polled if x['fd'] == sock][0]['events'] = \
lind_test_server.POLLIN | lind_test_server.POLLOUT
else:
#No data means remote socket closed, hence close the client socket
#in server, also remove this socket from polling.
lind_test_server.close_syscall(sock)
to_go = [x for x in polled if x['fd'] == sock]
map(polled.remove, to_go)
#Check for any activity in any of the output sockets...
for sock in ret[2]:
if sock is filefd:
assert lind_test_server.read_syscall(sock, 4) == "test", \
"Failed to read from a file..."
#test for file finished, remove from polling.
to_go = [x for x in polled if x['fd'] == sock]
map(polled.remove, to_go)
else:
lind_test_server.send_syscall(sock, data, 0)
#Data is sent out of this socket, it's no longer ready for writing,
#modify it only read mode.
[x for x in polled if x['fd'] == sock][0]['events'] = \
lind_test_server.POLLIN
lind_test_server.close_syscall(serversockfd)
lind_test_server.connect_syscall(clientsockfd, '127.0.0.1', 50300)
lind_test_server.send_syscall(clientsockfd, "test", 0)
#Short sleeps are not working, give enough time...
emultimer.sleep(1)
assert lind_test_server.recv_syscall(clientsockfd, 100, 0) == "test", \
"Write failed in select while processing client 1..."
lind_test_server.close_syscall(clientsockfd)
#Thread for running client 1, I did so because to show that server can handle
#multiple connections simultaneously...
emultimer.createthread(client1)
emultimer.sleep(.1)
#Client 2 connects to server, and send/recv data...
lind_test_server.connect_syscall(client2sockfd, '127.0.0.1', 50300)
lind_test_server.send_syscall(client2sockfd, "test", 0)
#Short sleeps are not working, give enough time...
emultimer.sleep(1)
assert lind_test_server.recv_syscall(client2sockfd, 100, 0) == "test", \
"Write failed in select while processing client 2..."
lind_test_server.close_syscall(client2sockfd)
#Exit all threads, no better way to close server thread which is in infinity
#loop...
emulmisc.exitall()