Since limits CSI parameters to be within range of u16, rather than
i64. This should effectively prevent downstream users from running
into DoS problems with excessively big escape sequence requests. An
example of a problematic escape would be CSI Ps b (repeat char).
The VT500 Programmer Information is inconsistent regarding the maximum
value that a parameter can take. In section 4.3.3.2 of EK-VT520-RM it
says that “any parameter greater than 9999 (decimal) is set to 9999
(decimal)”. However, in the description of DECSR (Secure Reset), its
parameter is allowed to range from 0 to 16383. Because individual
control functions need to make sure that numeric parameters are within
specific limits, the supported maximum is not critical, but it must be
at least 16383.
Since limits CSI parameters to be within range of
u16, rather thani64. This should effectively prevent downstream users from running into DoS problems with excessively big escape sequence requests. An example of a problematic escape would beCSI Ps b(repeat char).According to https://vt100.net/emu/dec_ansi_parser, the smallest possible size limit would be
16383: