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socket: increase message buffer length

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Add extra space to the socket message buffer to be able to receive
maximum-length NTP-over-PTP SW/HW-timestamped messages from the Linux
error queue (which are looped back as layer-2 frames).
This commit is contained in:
Miroslav Lichvar
2021-10-26 15:40:09 +02:00
parent 952c3b2528
commit a2d1569455
1 changed files with 10 additions and 5 deletions
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5
socket.c
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@@ -59,11 +59,16 @@ struct Message {
union sockaddr_all name; union sockaddr_all name;
struct iovec iov; struct iovec iov;
/* Buffer of sufficient length for all expected messages */ /* Buffer of sufficient length for all expected messages */
struct {
/* Extra space for Ethernet, IPv4/IPv6, and UDP headers in
timestamped messages received from the Linux error queue */
uint8_t l234_headers[64];
union { union {
NTP_Packet ntp_msg; NTP_Packet ntp_msg;
PTP_NtpMessage ptp_msg; PTP_NtpMessage ptp_msg;
CMD_Request cmd_request; CMD_Request cmd_request;
CMD_Reply cmd_reply; CMD_Reply cmd_reply;
} msg;
} msg_buf; } msg_buf;
/* Aligned buffer for control messages */ /* Aligned buffer for control messages */
struct cmsghdr cmsg_buf[CMSG_BUF_SIZE / sizeof (struct cmsghdr)]; struct cmsghdr cmsg_buf[CMSG_BUF_SIZE / sizeof (struct cmsghdr)];