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-rwxr-xr-xresources/traffic_scripts/ipv4_ping_ttl_check.py109
1 files changed, 57 insertions, 52 deletions
diff --git a/resources/traffic_scripts/ipv4_ping_ttl_check.py b/resources/traffic_scripts/ipv4_ping_ttl_check.py
index 2f1ea258ea..cc3afdec10 100755
--- a/resources/traffic_scripts/ipv4_ping_ttl_check.py
+++ b/resources/traffic_scripts/ipv4_ping_ttl_check.py
@@ -23,7 +23,7 @@ def check_ttl(ttl_begin, ttl_end, ttl_diff):
if ttl_begin != ttl_end + ttl_diff:
raise Exception(
"TTL changed from {} to {} but decrease by {} expected"
- .format(ttl_begin, ttl_end, hops))
+ .format(ttl_begin, ttl_end, ttl_diff))
def ckeck_packets_equal(pkt_send, pkt_recv):
@@ -39,57 +39,62 @@ def ckeck_packets_equal(pkt_send, pkt_recv):
raise Exception("Sent packet doesn't match received packet")
-args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip',
- 'hops', 'first_hop_mac', 'is_dst_tg'])
-
-src_if_name = args.get_arg('tx_if')
-dst_if_name = args.get_arg('rx_if')
-is_dst_tg = True if args.get_arg('is_dst_tg') == 'True' else False
-
-src_mac = args.get_arg('src_mac')
-first_hop_mac = args.get_arg('first_hop_mac')
-dst_mac = args.get_arg('dst_mac')
-src_ip = args.get_arg('src_ip')
-dst_ip = args.get_arg('dst_ip')
-hops = int(args.get_arg('hops'))
-
-if is_dst_tg and (src_if_name == dst_if_name):
- raise Exception("Source interface name equals destination interface name")
-
-src_if = Interface(src_if_name)
-src_if.send_pkt(str(create_gratuitous_arp_request(src_mac, src_ip)))
-if is_dst_tg:
- dst_if = Interface(dst_if_name)
- dst_if.send_pkt(str(create_gratuitous_arp_request(dst_mac, dst_ip)))
+def main():
+ args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip',
+ 'hops', 'first_hop_mac', 'is_dst_tg'])
+
+ src_if_name = args.get_arg('tx_if')
+ dst_if_name = args.get_arg('rx_if')
+ is_dst_tg = True if args.get_arg('is_dst_tg') == 'True' else False
+
+ src_mac = args.get_arg('src_mac')
+ first_hop_mac = args.get_arg('first_hop_mac')
+ dst_mac = args.get_arg('dst_mac')
+ src_ip = args.get_arg('src_ip')
+ dst_ip = args.get_arg('dst_ip')
+ hops = int(args.get_arg('hops'))
+
+ if is_dst_tg and (src_if_name == dst_if_name):
+ raise Exception("Source interface name equals destination interface name")
+
+ src_if = Interface(src_if_name)
+ src_if.send_pkt(str(create_gratuitous_arp_request(src_mac, src_ip)))
+ if is_dst_tg:
+ dst_if = Interface(dst_if_name)
+ dst_if.send_pkt(str(create_gratuitous_arp_request(dst_mac, dst_ip)))
+
+ pkt_req_send = (Ether(src=src_mac, dst=first_hop_mac) /
+ IP(src=src_ip, dst=dst_ip) /
+ ICMP())
+ src_if.send_pkt(pkt_req_send)
+
+ if is_dst_tg:
+ pkt_req_recv = dst_if.recv_pkt()
+ if pkt_req_recv is None:
+ raise Exception('Timeout waiting for packet')
+
+ check_ttl(pkt_req_send[IP].ttl, pkt_req_recv[IP].ttl, hops)
+ pkt_req_send_mod = pkt_req_send.copy()
+ pkt_req_send_mod[IP].ttl = pkt_req_recv[IP].ttl
+ del pkt_req_send_mod[IP].chksum # update checksum
+ ckeck_packets_equal(pkt_req_send_mod[IP], pkt_req_recv[IP])
+
+ pkt_resp_send = (Ether(src=dst_mac, dst=pkt_req_recv.src) /
+ IP(src=dst_ip, dst=src_ip) /
+ ICMP(type=0)) # echo-reply
+ dst_if.send_pkt(pkt_resp_send)
+
+ pkt_resp_recv = src_if.recv_pkt()
+ if pkt_resp_recv is None:
+ raise Exception('Timeout waiting for packet')
-pkt_req_send = (Ether(src=src_mac, dst=first_hop_mac) /
- IP(src=src_ip, dst=dst_ip) /
- ICMP())
-src_if.send_pkt(pkt_req_send)
+ if is_dst_tg:
+ check_ttl(pkt_resp_send[IP].ttl, pkt_resp_recv[IP].ttl, hops)
+ pkt_resp_send_mod = pkt_resp_send.copy()
+ pkt_resp_send_mod[IP].ttl = pkt_resp_recv[IP].ttl
+ del pkt_resp_send_mod[IP].chksum # update checksum
+ ckeck_packets_equal(pkt_resp_send_mod[IP], pkt_resp_recv[IP])
-if is_dst_tg:
- pkt_req_recv = dst_if.recv_pkt()
- if pkt_req_recv is None:
- raise Exception('Timeout waiting for packet')
- check_ttl(pkt_req_send[IP].ttl, pkt_req_recv[IP].ttl, hops)
- pkt_req_send_mod = pkt_req_send.copy()
- pkt_req_send_mod[IP].ttl = pkt_req_recv[IP].ttl
- del pkt_req_send_mod[IP].chksum # update checksum
- ckeck_packets_equal(pkt_req_send_mod[IP], pkt_req_recv[IP])
-
- pkt_resp_send = (Ether(src=dst_mac, dst=pkt_req_recv.src) /
- IP(src=dst_ip, dst=src_ip) /
- ICMP(type=0)) # echo-reply
- dst_if.send_pkt(pkt_resp_send)
-
-pkt_resp_recv = src_if.recv_pkt()
-if pkt_resp_recv is None:
- raise Exception('Timeout waiting for packet')
-
-if is_dst_tg:
- check_ttl(pkt_resp_send[IP].ttl, pkt_resp_recv[IP].ttl, hops)
- pkt_resp_send_mod = pkt_resp_send.copy()
- pkt_resp_send_mod[IP].ttl = pkt_resp_recv[IP].ttl
- del pkt_resp_send_mod[IP].chksum # update checksum
- ckeck_packets_equal(pkt_resp_send_mod[IP], pkt_resp_recv[IP])
+if __name__ == "__main__":
+ main()