node-ntrip / rtcm Goto Github PK

var this.index can be negative (line 110 - with "this.index -= potential")

when this.index is negative, line 70 crash.
chunk.copy(this.buffer, this.index, chunkOffset, chunkOffset + copyBytes);

with this test after line 110, I have no crash:
if (this.index < 0) {
this.index = 0
}

I have a NTRIP source that only sends message types 1004 (RtcmMessageGpsL1L2ObservablesExtended) and 1012 (RtcmMessageGlonassL1L2ObservablesExtended).

Unfortunately, the u-blox ZED-F9P receiver does not support these message types, but only 1005, 1006, 1007, 1033, 1074, 1075, 1077, 1084, 1085, 1087, 1094, 1095, 1097, 1124, 1125, 1127, 1230.

It seems that the equivalent to 1014 is 1077 (RtcmMessageMsm7Gps) or 1074 (RtcmMessageMsm4Gps) and the equivalent to 1012 is 1087 (RtcmMessageMsm7Glonass) or 1084 (RtcmMessageMsm5Glonass).

Is there any hope I can use this repo to translate 1014 messages to 1077/1074 and 1012 to 1087/1084?

I had a look at the source code but since I'm not a RTCM expert, I'm having difficulties to find an answer.

Thanks!

The decode-encode.js file is using TextDecoder and TextEncoder without import and may provoc crash on few devices.
To fix it i simply add the import TextDecoder = require("util").TextDecoder;

SO: Ubuntu 20.04.2 LTS
Node version: v10.19.0
Npm: 6.14.4