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CommandHandler() optimize and maybe security fix

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This commit is contained in:
Jörg Schüler-Maroldt 2020-04-25 00:55:39 +02:00
parent 24eff9108b
commit 4c0a85ba0f
1 changed files with 11 additions and 6 deletions
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17
tasmota/support_command.ino
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@ -204,14 +204,19 @@ void CommandHandler(char* topicBuf, char* dataBuf, uint32_t data_len)
if (type != nullptr) {
type++;
uint32_t i;
for (i = 0; i < strlen(type); i++) {
type[i] = toupper(type[i]);
int nLen; // strlen(type)
char *s = type;
for (nLen = 0; *s; s++, nLen++) {
*s=toupper(*s);
}
while (isdigit(type[i-1])) {
i--;
i = nLen;
if (i > 0) { // may be 0
while (isdigit(type[i-1])) {
i--;
}
}
if (i < strlen(type)) {
index = atoi(type +i);
if (i < nLen) {
index = atoi(type + i);
user_index = true;
}
type[i] = '\0';