What do you need an IP stack for when you want to process raw ethernet frames???
Dirk On Thu, Jul 25, 2019 at 10:25 PM Nathan Immerman via lwip-users < lwip-users@nongnu.org> wrote: > Hi all, > > I am implementing a software Precision Time Protocol (PTP) implementation > which requires reading Raw Ethernet II frames, no TCP/IP/UDP. An example > packet is copied below. Is this possible using lwIP? > > I see the raw_new api accepts a proto parameter but there doesn't seem to > be a protocal define for raw frames. > > Protocols defined in ip.h > #define IP_PROTO_ICMP 1 > #define IP_PROTO_IGMP 2 > #define IP_PROTO_UDP 17 > #define IP_PROTO_UDPLITE 136 > #define IP_PROTO_TCP 6 > > Thank you. > > Example PTP Raw Ethernet II frame copied from Wireshark > > Frame 28: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) > Encapsulation type: Ethernet (1) > Arrival Time: Jul 24, 2019 16:29:02.184864000 PDT > [Time shift for this packet: 0.000000000 seconds] > Epoch Time: 1564010942.184864000 seconds > [Time delta from previous captured frame: 0.008057000 seconds] > [Time delta from previous displayed frame: 0.008057000 seconds] > [Time since reference or first frame: 0.264827000 seconds] > Frame Number: 28 > Frame Length: 60 bytes (480 bits) > Capture Length: 60 bytes (480 bits) > [Frame is marked: False] > [Frame is ignored: False] > [Protocols in frame: eth:ethertype:ptp] > [Coloring Rule Name: Broadcast] > [Coloring Rule String: eth[0] & 1] > Ethernet II, Src: Trimble_70:09:90 (00:17:47:70:09:90), Dst: > IeeeI&MS_00:00:00 (01:1b:19:00:00:00) > Destination: IeeeI&MS_00:00:00 (01:1b:19:00:00:00) > Address: IeeeI&MS_00:00:00 (01:1b:19:00:00:00) > .... ..0. .... .... .... .... = LG bit: Globally unique address > (factory default) > .... ...1 .... .... .... .... = IG bit: Group address > (multicast/broadcast) > Source: Trimble_70:09:90 (00:17:47:70:09:90) > Address: Trimble_70:09:90 (00:17:47:70:09:90) > .... ..0. .... .... .... .... = LG bit: Globally unique address > (factory default) > .... ...0 .... .... .... .... = IG bit: Individual address > (unicast) > Type: PTPv2 over Ethernet (IEEE1588) (0x88f7) > Padding: 0000 > Precision Time Protocol (IEEE1588) > 0000 .... = transportSpecific: 0x0 > .... 0000 = messageId: Sync Message (0x0) > .... 0010 = versionPTP: 2 > messageLength: 44 > subdomainNumber: 24 > flags: 0x0000 > 0... .... .... .... = PTP_SECURITY: False > .0.. .... .... .... = PTP profile Specific 2: False > ..0. .... .... .... = PTP profile Specific 1: False > .... .0.. .... .... = PTP_UNICAST: False > .... ..0. .... .... = PTP_TWO_STEP: False > .... ...0 .... .... = PTP_ALTERNATE_MASTER: False > .... .... ..0. .... = FREQUENCY_TRACEABLE: False > .... .... ...0 .... = TIME_TRACEABLE: False > .... .... .... 0... = PTP_TIMESCALE: False > .... .... .... .0.. = PTP_UTC_REASONABLE: False > .... .... .... ..0. = PTP_LI_59: False > .... .... .... ...0 = PTP_LI_61: False > correction: 582.000015 nanoseconds > correction: Ns: 582 nanoseconds > correctionSubNs: 1.52587890625e-05 nanoseconds > ClockIdentity: 0x001747fffe700990 > SourcePortID: 1 > sequenceId: 9796 > control: Sync Message (0) > logMessagePeriod: -4 > originTimestamp (seconds): 1564010979 > originTimestamp (nanoseconds): 187716775 > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users
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