const char *
time_string (time_t t, int usec, bool show_usec, struct gc_arena *gc)
{
struct buffer out = alloc_buf_gc (64, gc);
struct timeval tv;
if (t)
{
tv.tv_sec = t;
tv.tv_usec = usec;
}
else
{
gettimeofday (&tv, NULL);
}
t = tv.tv_sec;
buf_printf (&out, "%s", ctime(&t));
buf_rmtail (&out, '\n');
if (show_usec && tv.tv_usec)
buf_printf (&out, " us=%d", (int)tv.tv_usec);
return BSTR (&out);
}
const char *
format_extended_socket_error (int fd, int *mtu, struct gc_arena *gc)
{
int res;
struct probehdr rcvbuf;
struct iovec iov;
struct msghdr msg;
struct cmsghdr *cmsg;
struct sock_extended_err *e;
struct sockaddr_in addr;
struct buffer out = alloc_buf_gc (256, gc);
char *cbuf = (char *) gc_malloc (256, false, gc);
*mtu = 0;
while (true)
{
memset (&rcvbuf, -1, sizeof (rcvbuf));
iov.iov_base = &rcvbuf;
iov.iov_len = sizeof (rcvbuf);
msg.msg_name = (uint8_t *) &addr;
msg.msg_namelen = sizeof (addr);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
msg.msg_control = cbuf;
msg.msg_controllen = 256; /* size of cbuf */
res = recvmsg (fd, &msg, MSG_ERRQUEUE);
if (res < 0)
goto exit;
e = NULL;
for (cmsg = CMSG_FIRSTHDR (&msg); cmsg; cmsg = CMSG_NXTHDR (&msg, cmsg))
{
if (cmsg->cmsg_level == SOL_IP)
{
if (cmsg->cmsg_type == IP_RECVERR)
{
e = (struct sock_extended_err *) CMSG_DATA (cmsg);
}
else
{
buf_printf (&out ,"CMSG=%d|", cmsg->cmsg_type);
}
}
}
if (e == NULL)
{
buf_printf (&out, "NO-INFO|");
goto exit;
}
switch (e->ee_errno)
{
case ETIMEDOUT:
buf_printf (&out, "ETIMEDOUT|");
break;
case EMSGSIZE:
buf_printf (&out, "EMSGSIZE Path-MTU=%d|", e->ee_info);
*mtu = e->ee_info;
break;
case ECONNREFUSED:
buf_printf (&out, "ECONNREFUSED|");
break;
case EPROTO:
buf_printf (&out, "EPROTO|");
break;
case EHOSTUNREACH:
buf_printf (&out, "EHOSTUNREACH|");
break;
case ENETUNREACH:
buf_printf (&out, "ENETUNREACH|");
break;
case EACCES:
buf_printf (&out, "EACCES|");
break;
default:
buf_printf (&out, "UNKNOWN|");
break;
}
}
exit:
buf_rmtail (&out, '|');
return BSTR (&out);
}
