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ptp_sendmsg() called a blocking recvmsg(state->tx_socket, ...) right after sending a Delay_Req whenever hardware_ts was set, assuming a Linux-style MSG_ERRQUEUE/loopback semantics NuttX does not have. Since tx_socket and event_socket share the same underlying connection, this call instead blocked on and consumed whatever PTP packet arrived next on the wire — almost always the Delay_Resp, which typically arrives within milliseconds of the request. Its payload was read into a local buffer that went out of scope on return, so the packet never reached ptp_process_rx_packet() and path_delay_ns stayed at 0 in -H mode. t3 is now captured locally via ptp_gettime(), the same way -S mode already did, until hardware TX timestamping is supported. Also replaces the path delay heuristic in ptp_process_delay_resp() (which derived an approximation of (t2-t1) from path_delay_ns and last_delta_ns, only valid once the clock had already converged) with the canonical IEEE 1588-2008 §11.3 formula: store (t2-t1) directly from Sync/Follow_Up as sync_diff_ns, then average it with (t4-t3) from the Delay_Req/Delay_Resp exchange. Relaxes the path delay ceiling to 10ms unconditionally, since Delay_Req's t3 is software- timestamped in both modes until hardware TX timestamping is supported. Assisted-by: Claude:claude-sonnet-5 Assisted-by: Gemini:gemini-3.8-flash-medium Signed-off-by: Daniel P. Carvalho <danieloak@gmail.com> |
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| CMakeLists.txt | ||
| Kconfig | ||
| Make.defs | ||
| Makefile | ||
| ptpd.c | ||
| ptpv2.h | ||