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Add check for command parameter, to be sure is the expected parameter and not a part of bigger one

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Add check pin number and value number are actually number to use them in [ESP201]
Add check on [ESPXXX command to recognize it when command start by [ESPXXX or something not bigger than`echo: [ESP`
Thanks @treeplesk for raising these case
This commit is contained in:
Luc 2020-12-22 15:40:20 +01:00
parent 95ec8b39e9
commit 99b6261aa4
1 changed files with 23 additions and 2 deletions
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25
esp3d/command.cpp
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@ -66,6 +66,19 @@ const char * encodeString(const char * s){
if (tmp =="") tmp=" ";
return tmp.c_str();
}
bool isValidNumber(String str)
{
boolean isNum=false;
if(!(str.charAt(0) == '+' || str.charAt(0) == '-' || isDigit(str.charAt(0)))) return false;
for(byte i=1;i<str.length();i++)
{
if(!(isDigit(str.charAt(i)) || str.charAt(i) == '.')) return false;
}
return true;
}
String COMMAND::get_param (String & cmd_params, const char * id, bool withspace)
{
static String parameter;
@ -85,6 +98,9 @@ String COMMAND::get_param (String & cmd_params, const char * id, bool withspace)
if (start == -1 ) {
return parameter;
}
if (start >0){
if (cmd_params[start-1]!=' ') return parameter;
}
//password and SSID can have space so handle it
//if no space expected use space as delimiter
if (!withspace) {
@ -511,7 +527,7 @@ bool COMMAND::execute_command (int cmd, String cmd_params, tpipe output, level_a
} else {
int pin = parameter.toInt();
//check pin is valid
if ((pin >= 0) && (pin <= MAX_GPIO)) {
if ((pin >= 0) && (pin <= MAX_GPIO) && isValidNumber(parameter)) {
//check if analog or digital
bool isdigital = true;
@ -573,6 +589,11 @@ bool COMMAND::execute_command (int cmd, String cmd_params, tpipe output, level_a
} else {
//it is a set
int value = parameter.toInt();
if (!isValidNumber(parameter)){
ESPCOM::println (INCORRECT_CMD_MSG, output, espresponse);
response = false;
break;
}
if (isdigital) {
//verify it is a 0 or a 1
if ( (value == 0) || (value == 1) ) {
@ -2059,7 +2080,7 @@ bool COMMAND::check_command (String buffer, tpipe output, bool handlelockserial,
if (ESPpos == -1 && (CONFIG::GetFirmwareTarget() == SMOOTHIEWARE)) {
ESPpos = buffer.indexOf ("[esp");
}
if (ESPpos > -1) {
if ((ESPpos > -1) && (ESPpos<strlen("echo: " ))){
//is there the second part?
int ESPpos2 = buffer.indexOf ("]", ESPpos);
if (ESPpos2 > -1) {