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Hello,
I'm using hardawre Nios II UDP Offload System with nios2-uClinux here is the soft configuration : --- Quote Start --- ..... const char *addr[] = { "192.168.10.170", "192.168.10.16" }; unsigned char the_dest_mac[6]={0x00,0x1A,0xa0,0x0d,0x09,0x19}; unsigned char my_src_mac[6]={0x00,0x07,0xED,0x0D,0x09,0x19}; void connectSocketUDP() { ...... if(( id_socket = socket(AF_INET, SOCK_DGRAM, 0)) == -1 ) {perror("----------------------------Server-socket() id_socket error lol!"); disConnectSocketUDP(); } ..... if(bind(id_socket, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) /*! associate the id_socket to adress server*/ { perror("----------------------------Server-bind() error lol!"); disConnectSocketUDP(); } addr_len = sizeof(struct sockaddr); /*! get the length of struct sockaddr*/ isconnectedUDP=1; } int main(int argc, char *argv[]) { .... while(exit==0) { if(isconnectedUDP == 0) { connectSocketUDP(); } else { if(start == 0) {my_src_ip = inet_addr(addr[0]); the_dest_ip = inet_addr(addr[1]); insert_stat.udp_dst = MYPORT; // we fill out this insert_stat struct to pass into the insert_stat.udp_src = MYPORT; // payload inserter utility function insert_stat.ip_dst = the_dest_ip; insert_stat.ip_src = my_src_ip; insert_stat.mac_dst_hi = (the_dest_mac[0] << 24) | (the_dest_mac[1] << 16) | (the_dest_mac[2] << 8) | (the_dest_mac[3]); insert_stat.mac_dst_lo = (the_dest_mac[4] << 8) | (the_dest_mac[5]); insert_stat.mac_src_hi = (my_src_mac[0] << 24) | (my_src_mac[1] << 16) | (my_src_mac[2] << 8) | (my_src_mac[3]); insert_stat.mac_src_lo = (my_src_mac[4] << 8) | (my_src_mac[5]); if(start_udp_payload_inserter(inserter_bases[0], &insert_stat)) { continue; } [/INDENT] if(start_packet_generator(generator_bases[0],(unsigned short)requested_packet_length, 0x33557799)) { continue; } start = 1; [/INDENT]} sleep(10); stop_packet_generator(generator_bases[0]); stop_udp_payload_inserter(inserter_bases[0]); .... return 0; } --- Quote End --- using a packet sniffer on a PC, i receive frames but not UDP (protocol 0x0919) !! --- Quote Start --- SOURCE : 09:19:00:07:ed:0d DESTINATION : 00:00:00_1a:a0:0d:09:19 (2 bytes inserts from API component) Protocol (Unknow) : 0x0919 info : Ethernet II (data 800 bytes) --- Quote End --- the only difference with the example in altera wiki is the clock signal (60MHz for the GEN et INS component) Thanks for helpLink Copied
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the problem come from alignment_pad_inserter component, it inserts two pad bytes at the beginning
is it necessary to use it?- Mark as New
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It is necessary if you enable the pad option in the TSE settings in Sopc builder/QSys. This option makes life easier for some drivers. You can disable the option in the TSE and not use the alignment_pad_inserter component, but then you might run into trouble if you use the TSE with software.
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the SOPC option to enable the pad is it : Align packet headers to 32bits?
When i Enable the pad option using API component i have this frame --- Quote Start --- 00:00:00:1a:a0:0d:09:19:08:00:45:00:03:3c:00:00:40:00:ff: 11:6d:1b:aa:0a:a8:c0:10:0a:a8:c0:1f:f5:1f:f5:03:28:00:00: fd:31:03:24:1c:ba:97:d9:0e:d9:2e:77:52:cb:02:3f:d0:fe:7b: 4f:97:59:9d:48:62:c8:dc:61:d0:ac:bf:8f:8d:34:25:47:1e:30: dc:39:3d:9d:ba:7d:2b:54:82:fa:e2:30:92:b1:bd:a9:89:8d:2c: --- Quote End --- if i keep this option enable and i remove API component i have the correct UDP frame --- Quote Start --- 00:1a:a0:0d:09:19:08:00:45:00:03:3c:00:00:40:00:ff: 11:6d:1b:aa:0a:a8:c0:10:0a:a8:c0:1f:f5:1f:f5:03:28:00:00: fd:31:03:24:1c:ba:97:d9:0e:d9:2e:77:52:cb:02:3f:d0:fe:7b: 4f:97:59:9d:48:62:c8:dc:61:d0:ac:bf:8f:8d:34:25:47:1e:30: dc:39:3d:9d:ba:7d:2b:54:82:fa:e2:30:92:b1:bd:a9:89:8d:2c: --- Quote End ---- Mark as New
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Yes this is the right option. What you report is strange, it's almost as if you had two pad insertions.
Could you put a Signaltap probe on the Avalon Stream going to the TSE, to check what's going in and how much pagding you have in front of the packet?- Mark as New
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Hi,
I have similar problem. I observe UDP data in wireshark with additional 2 byte data (00 00) at the beginning of payload inserted by Alignment pad inserter component. But when I remove this alignment pad inserter component, It's no more recognized as a UDP data. Is there any solution to this problem?![](/skins/images/7B0AB6865064EAE32B30EC9A4E94B48A/responsive_peak/images/icon_anonymous_message.png)
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