tests: partial revert of 4627bc1

Python's socketmodule isn't able to construct sockaddr when it doesn't
recognize the address family.  Until this is solved in python let the
tests use the compatibility way to create divert(4) socket.

tests/sys/common/divert.py

@@ -36,7 +36,7 @@
 import argparse
 
 
-PF_DIVERT = 44
+IPPROTO_DIVERT = 258
 
 
 def parse_args():
@@ -52,22 +52,22 @@ def parse_args():
 
 def ipdivert_ip_output_remote_success(args):
     packet = sc.IP(dst=args.dip) / sc.ICMP(type='echo-request')
-    with socket.socket(PF_DIVERT, socket.SOCK_RAW, 0) as s:
+    with socket.socket(socket.AF_INET, socket.SOCK_RAW, IPPROTO_DIVERT) as s:
         s.bind(('0.0.0.0', args.divert_port))
         s.sendto(bytes(packet), ('0.0.0.0', 0))
 
 
 def ipdivert_ip6_output_remote_success(args):
     packet = sc.IPv6(dst=args.dip) / sc.ICMPv6EchoRequest()
-    with socket.socket(PF_DIVERT, socket.SOCK_RAW, 0) as s:
+    with socket.socket(socket.AF_INET, socket.SOCK_RAW, IPPROTO_DIVERT) as s:
         s.bind(('0.0.0.0', args.divert_port))
         s.sendto(bytes(packet), ('0.0.0.0', 0))
 
 
 def ipdivert_ip_input_local_success(args):
     """Sends IPv4 packet to OS stack as inbound local packet."""
     packet = sc.IP(dst=args.dip,src=args.sip) / sc.ICMP(type='echo-request')
-    with socket.socket(PF_DIVERT, socket.SOCK_RAW, 0) as s:
+    with socket.socket(socket.AF_INET, socket.SOCK_RAW, IPPROTO_DIVERT) as s:
         s.bind(('0.0.0.0', args.divert_port))
         s.sendto(bytes(packet), (args.dip, 0))