Dear Guy, The clib_socket(...) APIs use system calls to send/receive data via the Linux network stack. Linux is blissfully unaware of vpp interfaces, so it can't work.
To receive ip-udp-for-us-to-a-dst-port packets on a vpp interface, register a graph node to process packets. See.../src/vnet/vxlan/vxlan.c:vxlan_init(...) for an example. The API you'll need to use is udp_register_dst_port(...). HTH... Dave From: vpp-dev-boun...@lists.fd.io [mailto:vpp-dev-boun...@lists.fd.io] On Behalf Of Guy Doucet -X (gudoucet - FLEXTRONICS CANADA DESIGN SERVICES INC at Cisco) Sent: Friday, May 12, 2017 3:33 PM To: vpp-dev@lists.fd.io Subject: [vpp-dev] using clib_socket interface to receive udp stream Hi, I am trying to use the clib_socket interface to process a udp multical stream being received by fd.io interface. I followed the example in test_socket.c. I am registering for the stream as follows: s->config = "232.0.0.1:5001"; .. error = clib_socket_init (s); .. error = clib_socket_rx (s, 100); The packets being received are as follows: 03:16:18:555288: dpdk-input GigabitEthernet6/0/3 rx queue 0 buffer 0x1bf26a1: current data 14, length 1428, free-list 0, clone-count 0, totlen-nifb 0, trace 0x9 PKT MBUF: port 0, nb_segs 1, pkt_len 1442 buf_len 2176, data_len 1442, ol_flags 0x180, data_off 128, phys_addr 0x72696740 packet_type 0x211 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_UDP (0x0200) UDP packet IP4: 00:02:c5:1b:51:07 -> 01:00:5e:00:00:01 UDP: 10.10.10.33 -> 232.0.0.1 tos 0x00, ttl 64, length 1428, checksum 0x392d fragment id 0x0000, flags DONT_FRAGMENT UDP: 1000 -> 5001 length 1408, checksum 0x0000 03:16:18:555289: ip4-input-no-checksum UDP: 10.10.10.33 -> 232.0.0.1 tos 0x00, ttl 64, length 1428, checksum 0x392d fragment id 0x0000, flags DONT_FRAGMENT UDP: 1000 -> 5001 length 1408, checksum 0x0000 03:16:18:555296: ip4-mfib-forward-lookup fib 0 entry 0 03:16:18:555297: ip4-mfib-forward-rpf entry 0 -1 03:16:18:555297: ip4-drop UDP: 10.10.10.33 -> 232.0.0.1 tos 0x00, ttl 64, length 1428, checksum 0x392d fragment id 0x0000, flags DONT_FRAGMENT UDP: 1000 -> 5001 length 1408, checksum 0x0000 03:16:18:555297: error-drop ip4-input: ip4 adjacency drop I get an error on the receive. (d612a0e0). Anyone have any ideas what could be going wrong. Thanks, Guy
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