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Fix parsing numbers from null-terminated buffers (#2755)

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This commit is contained in:
Oxan van Leeuwen
2021-11-25 21:00:49 +01:00
committed by GitHub
parent 2aea27d272
commit 3637be251e
4 changed files with 26 additions and 24 deletions
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esphome/components/anova/anova_base.cpp
+12 -11
View File
@@ -73,51 +73,52 @@ AnovaPacket *AnovaCodec::get_stop_request() {
}
void AnovaCodec::decode(const uint8_t *data, uint16_t length) {
memset(this->buf_, 0, 32);
strncpy(this->buf_, (char *) data, length);
char buf[32];
memset(buf, 0, sizeof(buf));
strncpy(buf, (char *) data, std::min<uint16_t>(length, sizeof(buf) - 1));
this->has_target_temp_ = this->has_current_temp_ = this->has_unit_ = this->has_running_ = false;
switch (this->current_query_) {
case READ_DEVICE_STATUS: {
if (!strncmp(this->buf_, "stopped", 7)) {
if (!strncmp(buf, "stopped", 7)) {
this->has_running_ = true;
this->running_ = false;
}
if (!strncmp(this->buf_, "running", 7)) {
if (!strncmp(buf, "running", 7)) {
this->has_running_ = true;
this->running_ = true;
}
break;
}
case START: {
if (!strncmp(this->buf_, "start", 5)) {
if (!strncmp(buf, "start", 5)) {
this->has_running_ = true;
this->running_ = true;
}
break;
}
case STOP: {
if (!strncmp(this->buf_, "stop", 4)) {
if (!strncmp(buf, "stop", 4)) {
this->has_running_ = true;
this->running_ = false;
}
break;
}
case READ_TARGET_TEMPERATURE: {
this->target_temp_ = parse_number<float>(this->buf_, sizeof(this->buf_)).value_or(0.0f);
this->target_temp_ = parse_number<float>(buf, sizeof(buf)).value_or(0.0f);
if (this->fahrenheit_)
this->target_temp_ = ftoc(this->target_temp_);
this->has_target_temp_ = true;
break;
}
case SET_TARGET_TEMPERATURE: {
this->target_temp_ = parse_number<float>(this->buf_, sizeof(this->buf_)).value_or(0.0f);
this->target_temp_ = parse_number<float>(buf, sizeof(buf)).value_or(0.0f);
if (this->fahrenheit_)
this->target_temp_ = ftoc(this->target_temp_);
this->has_target_temp_ = true;
break;
}
case READ_CURRENT_TEMPERATURE: {
this->current_temp_ = parse_number<float>(this->buf_, sizeof(this->buf_)).value_or(0.0f);
this->current_temp_ = parse_number<float>(buf, sizeof(buf)).value_or(0.0f);
if (this->fahrenheit_)
this->current_temp_ = ftoc(this->current_temp_);
this->has_current_temp_ = true;
@@ -125,8 +126,8 @@ void AnovaCodec::decode(const uint8_t *data, uint16_t length) {
}
case SET_UNIT:
case READ_UNIT: {
this->unit_ = this->buf_[0];
this->fahrenheit_ = this->buf_[0] == 'f';
this->unit_ = buf[0];
this->fahrenheit_ = buf[0] == 'f';
this->has_unit_ = true;
break;
}
esphome/components/anova/anova_base.h
-1
View File
@@ -70,7 +70,6 @@ class AnovaCodec {
bool has_current_temp_;
bool has_unit_;
bool has_running_;
char buf_[32];
bool fahrenheit_;
CurrentQuery current_query_;
esphome/components/ezo/ezo.cpp
+2 -2
View File
@@ -32,7 +32,7 @@ void EZOSensor::update() {
}
void EZOSensor::loop() {
uint8_t buf[20];
uint8_t buf[21];
if (!(this->state_ & EZO_STATE_WAIT)) {
if (this->state_ & EZO_STATE_SEND_TEMP) {
int len = sprintf((char *) buf, "T,%0.3f", this->tempcomp_);
@@ -74,7 +74,7 @@ void EZOSensor::loop() {
if (buf[0] != 1)
return;
float val = parse_number<float>((char *) &buf[1], sizeof(buf) - 1).value_or(0);
float val = parse_number<float>((char *) &buf[1], sizeof(buf) - 2).value_or(0);
this->publish_state(val);
}