[Linuxptp-devel] Enterprise profile for ptp - No slave delay request packet

[Daniel Le]

Hello,

In my set-up to try the enterprise profile for PTP, tcpdump indicates the slave device correctly receives the master multicast announce and sync messages, however there is no slave outgoing unicast delay requests at all.

For debugging purpose, I modified the function port_delay_request() as follows and noticed the master's source IPv4 address was 0.0.0.0, which implies the slave's delay request is ultimately dropped by transport_sendto(). Can someone point out what I'm missing here? Where else in the code to better verify the master IP address on slave end?

static int port_delay_request(struct port *p)
{
...
char str[INET_ADDRSTRLEN];
...
if (p->hybrid_e2e) {
struct ptp_message *dst = TAILQ_FIRST(&p->best->messages);
msg->address = dst->address;
msg->header.flagField[0] |= UNICAST;

inet_ntop(AF_INET, &(dst->address.sin.sin_addr), str, INET_ADDRSTRLEN);
pr_info("address = %s", str);
}
...
}

Thanks,
Daniel

[Daniel Le]

Please ignore this. It is an issue in my adaptation code where it doesn't retrieve ingress packet source IP address.

Daniel

From: Daniel Le
Sent: Tuesday, December 08, 2015 6:40 PM
To: linuxptp-***@lists.sourceforge.net
Subject: [Linuxptp-devel] Enterprise profile for ptp - No slave delay request packet

Hello,

In my set-up to try the enterprise profile for PTP, tcpdump indicates the slave device correctly receives the master multicast announce and sync messages, however there is no slave outgoing unicast delay requests at all.

For debugging purpose, I modified the function port_delay_request() as follows and noticed the master's source IPv4 address was 0.0.0.0, which implies the slave's delay request is ultimately dropped by transport_sendto(). Can someone point out what I'm missing here? Where else in the code to better verify the master IP address on slave end?

static int port_delay_request(struct port *p)
{
...
char str[INET_ADDRSTRLEN];
...
if (p->hybrid_e2e) {
struct ptp_message *dst = TAILQ_FIRST(&p->best->messages);
msg->address = dst->address;
msg->header.flagField[0] |= UNICAST;

inet_ntop(AF_INET, &(dst->address.sin.sin_addr), str, INET_ADDRSTRLEN);
pr_info("address = %s", str);
}
...
}

Thanks,
Daniel