Too many open files Error while running multiple sendp() requests simultaneously.

[prabhaker75]

Brief description
I am trying to send many sendp() requests from multiple threads simultaneously, but it shows too many open files error after sending 144 requests simultaneously I have already tried ulimit to increase the file descriptors still I can't send more than 144 requests at a time after which it shows OSError: [Errno 24] Too many open files

Environment
Python 3.7.2
Scapy Version 2.4.2
Linux 5.0.0-arch1-1-ARCH #1 SMP PREEMPT Mon Mar 4 14:11:43 UTC 2019 x86_64 GNU/Linux

How to reproduce
i have written a script which i run in a multithreaded way to send packets using sendp() simultaneously but the code craches after sending for 144 client. any solutions what i can do to increase the number below is the code for one such thread:-

import fcntl, socket, struct

def getHwAddr(ifname):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
info = fcntl.ioctl(s.fileno(), 0x8927, struct.pack('256s', ifname[:15]))
return ''.join(['%02x:' % ord(char) for char in info[18:24]])[:-1]

hw = getHwAddr("enp0s8")
import binascii

p=Ether(src=hw, dst="ff:ff:ff:ff:ff:ff")/IP(src="0.0.0.0", dst="255.255.255.255")/UDP(sport=68, dport=67)/BOOTP(op=1, flags=32768, chaddr=binascii.unhexlify(hw.replace(":", "")))/DHCP(options=[("message-type", "discover"), "end"])

sendp(p,iface="enp0s8")

[guedou]

Could you share a small and complete example that triggers our issue ?

[guedou]

Feel free to reopen the issue when providing an answer.