Logging question

[cal70]

I'm using OpenBSD as the router / firewall, so far loving it. I daily check the logs (messages & daemon). I have had some issues and been able to sort all except this. I don't know where to go from here...

Screen shot of log output.

Here is the issue:

Jun  4 17:00:02 firewall-dev syslogd[39702]: restart
Jun  4 18:16:35 firewall-dev dhclient[26642]: vmx0: sendmsg(DHCPREQUEST): Permission denied
Jun  4 18:16:36 firewall-dev dhclient[26642]: vmx0: sendmsg(DHCPREQUEST): Permission denied

Appreciate any help...

[jggimi]

This error is produced in /usr/src/sbin/dhclient/bpf.c, at line number 323:

    315         } else {
    316                 memset(&msg, 0, sizeof(msg));
    317                 msg.msg_name = (struct sockaddr *)&dest;
    318                 msg.msg_namelen = sizeof(dest);
    319                 msg.msg_iov = iov;
    320                 msg.msg_iovlen = iovcnt;
    321                 result = sendmsg(ifi->udpfd, &msg, 0);
    322                 if (result == -1)
    323                         log_warn("%s: sendmsg(%s)", log_procname, desc);
    324                 else if (result < total) {
    325                         result = -1;
    326                         log_warnx("%s, sendmsg(%s): %zd of %zd bytes",
    327                             log_procname, desc, result, total);
    328                 }

sendmsg(2) is a syscall which can produce an access error.

     [EACCES]           The connection was blocked by pf(4), or SO_BROADCAST
                        is not set on the socket and a broadcast address was
                        given as the destination.

If you're certain this isn't a PF issue, then you may want to do some dhclient(8) debugging. You can start it with -v, and if that fails to provide sufficient information, you can dust off your programming skills and use gdb(1) or devel/gdb, set breakpoints, and/or log values before the syscall. I note that vmx(4) is something of a special case pseudo-NIC, designed for use in VMWare guests.