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ircd/listener: return a TLS record layer alert to D-Lined TLS clients

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Aaron Jones 2022-01-22 23:50:58 +00:00 committed by Doug Freed
parent c0d93064a6
commit 3fdf26aa19
1 changed files with 16 additions and 4 deletions
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20
ircd/listener.c
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@ -572,8 +572,6 @@ accept_sslcallback(struct Client *client_p, int status)
return 0; /* use default handler if status != RB_OK */
}
static const char *toofast = "ERROR :Reconnecting too fast, throttled.\r\n";
static int
accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, void *data)
{
@ -583,6 +581,13 @@ accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, voi
static time_t last_oper_notice = 0;
int len;
static const char *toofast = "ERROR :Reconnecting too fast, throttled.\r\n";
static const unsigned char sslerrcode[] = {
// SSLv3.0 Fatal Alert: Access Denied
0x15, 0x03, 0x00, 0x00, 0x02, 0x02, 0x31
};
if(listener->ssl && (!ircd_ssl_ok || !get_ssld_count()))
{
rb_close(F);
@ -618,7 +623,11 @@ accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, voi
{
ServerStats.is_ref++;
if(ConfigFileEntry.dline_with_reason)
if(listener->ssl)
{
rb_write(F, sslerrcode, sizeof(sslerrcode));
}
else if(ConfigFileEntry.dline_with_reason)
{
len = snprintf(buf, sizeof(buf), "ERROR :*** Banned: %s\r\n", get_user_ban_reason(aconf));
if (len >= (int)(sizeof(buf)-1))
@ -627,11 +636,14 @@ accept_precallback(rb_fde_t *F, struct sockaddr *addr, rb_socklen_t addrlen, voi
buf[sizeof(buf) - 2] = '\n';
buf[sizeof(buf) - 1] = '\0';
}
rb_write(F, buf, strlen(buf));
}
else
{
strcpy(buf, "ERROR :You have been D-lined.\r\n");
rb_write(F, buf, strlen(buf));
}
rb_close(F);
return 0;
}