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# Test TCP recv with MSG_PEEK
#
# Note that bare metal LWIP only returns at most one packet's worth of TCP data
# in any recv() call - including when peeking - so can't be too clever with
# different recv() combinations
import socket
import random
# Server
def instance0():
PORT = random.randrange(10000, 50000)
multitest.globals(IP=multitest.get_network_ip(), PORT=PORT)
s = socket.socket()
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(socket.getaddrinfo("0.0.0.0", PORT)[0][-1])
s.listen()
multitest.next()
s2, _ = s.accept()
print(s2.recv(8, socket.MSG_PEEK))
print(s2.recv(8))
s2.send(b"1234567890")
multitest.broadcast("0-sent")
multitest.wait("1-sent")
print(s2.recv(5, socket.MSG_PEEK))
print(s2.recv(5, socket.MSG_PEEK))
multitest.broadcast("0-recved")
multitest.wait("1-recved") # sync here necessary as MP sends RST if closing TCP early
s2.close()
s.close()
# Client
def instance1():
multitest.next()
s = socket.socket()
s.connect(socket.getaddrinfo(IP, PORT)[0][-1])
s.send(b"abcdefgh")
multitest.broadcast("1-sent")
multitest.wait("0-sent")
s.send(b"klmnopqr")
print(s.recv(5, socket.MSG_PEEK))
print(s.recv(10))
multitest.broadcast("1-recved")
multitest.wait("0-recved")
s.close()
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