Hi, 

That script has not been recently maintained. Can’t you use instead vcl/ldp? 

From the logs, probably the server is not binding correctly. 

Florin

> On May 31, 2019, at 6:28 PM, nataraj.bat...@gmail.com wrote:
> 
> Update on sock_test_client/sock_test_server:
> 
> After running with LD_PRELOAD variable set, still see same issue. But the 
> problem is on server side. Its getting SYN packet sent by client but is 
> sending RST. Am I missing any config?
> 
> root@host2:~/vpp/build-root/build-vpp-native/vpp/bin# 
> LD_PRELOAD=/root/vpp/build-root/build-vpp-native/vpp/lib/libvcl_ldpreload.so 
> ./sock_test_server 1.1.0.2 10011
>  
> SERVER: Waiting for a client to connect on port 1...
>  
> SERVER: epoll_wait() timeout!
>  
> SERVER: epoll_wait() timeout!
>  
> SERVER: epoll_wait() timeout!
>  
> SERVER: epoll_wait() timeout!
> 
> 
> root@host1:~/vpp/build-root/build-vpp-native/vpp/bin# 
> LD_PRELOAD=/root/vpp/build-root/build-vpp-native/vpp/lib/libvcl_ldpreload.so 
> ./sock_test_client 1.1.0.2 10011
>  
> CLIENT: Connecting to server...
> ERROR in main(): Connection refused
> CLIENT: ERROR: connect failed (errno = 111)!
> vl_client_disconnect:331: queue drain: 585
> 
> show trace o/p on server:
> ===================
> Packet 1
>  
> 03:52:39:089787: dpdk-input
>   TenGigabitEthernet3b/0/1 rx queue 0
>   buffer 0x9b381: current data 0, length 74, buffer-pool 0, ref-count 1, 
> totlen-nifb 0, trace 0x0
>                   ext-hdr-valid 
>                   l4-cksum-computed l4-cksum-correct 
>   PKT MBUF: port 0, nb_segs 1, pkt_len 74
>     buf_len 2176, data_len 74, ol_flags 0x180, data_off 128, phys_addr 
> 0xab2ce0c0
>     packet_type 0x111 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
>     rss 0x0 fdir.hi 0x0 fdir.lo 0x0
>     Packet Offload Flags
>       PKT_RX_IP_CKSUM_GOOD (0x0080) IP cksum of RX pkt. is valid
>       PKT_RX_L4_CKSUM_GOOD (0x0100) L4 cksum of RX pkt. is valid
>     Packet Types
>       RTE_PTYPE_L2_ETHER (0x0001) Ethernet packet
>       RTE_PTYPE_L3_IPV4 (0x0010) IPv4 packet without extension headers
>       RTE_PTYPE_L4_TCP (0x0100) TCP packet
>   IP4: 70:69:5a:48:08:b3 -> 00:be:75:72:3d:5f
>   TCP: 1.1.0.1 -> 1.1.0.2
>     tos 0x00, ttl 255, length 60, checksum 0xfdca
>     fragment id 0x7bec, flags DONT_FRAGMENT
>   TCP: 44839 -> 10011
>     seq. 0xf06c93e7 ack 0x00000000
>     flags 0x02 SYN, tcp header: 40 bytes
>     window 4096, checksum 0xa241
> 03:52:39:089798: ethernet-input
>   frame: flags 0x3, hw-if-index 1, sw-if-index 1
>   IP4: 70:69:5a:48:08:b3 -> 00:be:75:72:3d:5f
> 03:52:39:089805: ip4-input-no-checksum
>   TCP: 1.1.0.1 -> 1.1.0.2
>     tos 0x00, ttl 255, length 60, checksum 0xfdca
>     fragment id 0x7bec, flags DONT_FRAGMENT
>   TCP: 44839 -> 10011
>     seq. 0xf06c93e7 ack 0x00000000
>     flags 0x02 SYN, tcp header: 40 bytes
>     window 4096, checksum 0xa241
> 03:52:39:089811: ip4-lookup
>   fib 0 dpo-idx 5 flow hash: 0x00000000
>   TCP: 1.1.0.1 -> 1.1.0.2
>     tos 0x00, ttl 255, length 60, checksum 0xfdca
>     fragment id 0x7bec, flags DONT_FRAGMENT
>   TCP: 44839 -> 10011
>     seq. 0xf06c93e7 ack 0x00000000
>     flags 0x02 SYN, tcp header: 40 bytes
>     window 4096, checksum 0xa241
> 03:52:39:089819: ip4-local
>     TCP: 1.1.0.1 -> 1.1.0.2
>       tos 0x00, ttl 255, length 60, checksum 0xfdca
>       fragment id 0x7bec, flags DONT_FRAGMENT
>     TCP: 44839 -> 10011
>       seq. 0xf06c93e7 ack 0x00000000
>       flags 0x02 SYN, tcp header: 40 bytes
>       window 4096, checksum 0xa241
> 03:52:39:089821: tcp4-input
>   TCP: 44839 -> 10011
>     seq. 0xf06c93e7 ack 0x00000000
>     flags 0x02 SYN, tcp header: 40 bytes
>     window 4096, checksum 0xa241
>   [0:0][T] :::0->:::0                               CLOSED         
> 03:52:39:089828: tcp4-reset
>   TCP: 10011 -> 44839
>     seq. 0x00000000 ack 0xf06c93e8
>     flags 0x14 RST ACK, tcp header: 20 bytes
>     window 0, checksum 0x5334
>   [0:0][T] :::0->:::0                               CLOSED  
>  
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