/*
* Called after most socket or tun/tap operations, via the inline
* function check_status().
*
* Decide if we should print an error message, and see if we can
* extract any useful info from the error, such as a Path MTU hint
* from the OS.
*/
void
x_check_status (int status,
const char *description,
struct link_socket *sock,
struct tuntap *tt)
{
const int my_errno = openvpn_errno ();
const char *extended_msg = NULL;
msg (x_cs_verbose_level, "%s %s returned %d",
sock ? proto2ascii (sock->info.proto, true) : "",
description,
status);
if (status < 0)
{
struct gc_arena gc = gc_new ();
#if EXTENDED_SOCKET_ERROR_CAPABILITY
/* get extended socket error message and possible PMTU hint from OS */
if (sock)
{
int mtu;
extended_msg = format_extended_socket_error (sock->sd, &mtu, &gc);
if (mtu > 0 && sock->mtu != mtu)
{
sock->mtu = mtu;
sock->info.mtu_changed = true;
}
}
#elif defined(WIN32)
/* get possible driver error from TAP-Windows driver */
extended_msg = tap_win_getinfo (tt, &gc);
#endif
if (!ignore_sys_error (my_errno))
{
if (extended_msg)
msg (x_cs_info_level, "%s %s [%s]: %s (code=%d)",
description,
sock ? proto2ascii (sock->info.proto, true) : "",
extended_msg,
strerror_ts (my_errno, &gc),
my_errno);
else
msg (x_cs_info_level, "%s %s: %s (code=%d)",
description,
sock ? proto2ascii (sock->info.proto, true) : "",
strerror_ts (my_errno, &gc),
my_errno);
if (x_cs_err_delay_ms)
platform_sleep_milliseconds (x_cs_err_delay_ms);
}
gc_free (&gc);
}
}
/*
* Print statistics.
*
* Triggered by SIGUSR2 or F2 on Windows.
*/
void
print_status(const struct context *c, struct status_output *so)
{
struct gc_arena gc = gc_new();
status_reset(so);
status_printf(so, "OpenVPN STATISTICS");
status_printf(so, "Updated,%s", time_string(0, 0, false, &gc));
status_printf(so, "TUN/TAP read bytes," counter_format, c->c2.tun_read_bytes);
status_printf(so, "TUN/TAP write bytes," counter_format, c->c2.tun_write_bytes);
status_printf(so, "TCP/UDP read bytes," counter_format, c->c2.link_read_bytes);
status_printf(so, "TCP/UDP write bytes," counter_format, c->c2.link_write_bytes);
status_printf(so, "Auth read bytes," counter_format, c->c2.link_read_bytes_auth);
#ifdef USE_COMP
if (c->c2.comp_context)
{
comp_print_stats(c->c2.comp_context, so);
}
#endif
#ifdef PACKET_TRUNCATION_CHECK
status_printf(so, "TUN read truncations," counter_format, c->c2.n_trunc_tun_read);
status_printf(so, "TUN write truncations," counter_format, c->c2.n_trunc_tun_write);
status_printf(so, "Pre-encrypt truncations," counter_format, c->c2.n_trunc_pre_encrypt);
status_printf(so, "Post-decrypt truncations," counter_format, c->c2.n_trunc_post_decrypt);
#endif
#ifdef _WIN32
if (tuntap_defined(c->c1.tuntap))
{
status_printf(so, "TAP-WIN32 driver status,\"%s\"",
tap_win_getinfo(c->c1.tuntap, &gc));
}
#endif
status_printf(so, "END");
status_flush(so);
gc_free(&gc);
}
