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Fix potential segmentation fault. 

Described in #490.
This commit is contained in:
Nicolas "Pixel" Noble 2018-08-11 15:27:56 +02:00
parent b3d05a3859
commit db291906fa
1 changed files with 13 additions and 1 deletions
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14
packages/grpc-native-core/ext/channel.cc
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@ -270,6 +270,10 @@ NAN_METHOD(Channel::GetTarget) {
"getTarget can only be called on Channel objects");
}
Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
if (channel->wrapped_channel == NULL) {
return Nan::ThrowError(
"Cannot call getTarget on a closed Channel");
}
info.GetReturnValue().Set(
Nan::New(grpc_channel_get_target(channel->wrapped_channel))
.ToLocalChecked());
@ -281,6 +285,10 @@ NAN_METHOD(Channel::GetConnectivityState) {
"getConnectivityState can only be called on Channel objects");
}
Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
if (channel->wrapped_channel == NULL) {
return Nan::ThrowError(
"Cannot call getConnectivityState on a closed Channel");
}
int try_to_connect = (int)info[0]->Equals(Nan::True());
info.GetReturnValue().Set(grpc_channel_check_connectivity_state(
channel->wrapped_channel, try_to_connect));
@ -303,12 +311,16 @@ NAN_METHOD(Channel::WatchConnectivityState) {
return Nan::ThrowTypeError(
"watchConnectivityState's third argument must be a callback");
}
Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
if (channel->wrapped_channel == NULL) {
return Nan::ThrowError(
"Cannot call watchConnectivityState on a closed Channel");
}
grpc_connectivity_state last_state = static_cast<grpc_connectivity_state>(
Nan::To<uint32_t>(info[0]).FromJust());
double deadline = Nan::To<double>(info[1]).FromJust();
Local<Function> callback_func = info[2].As<Function>();
Nan::Callback *callback = new Callback(callback_func);
Channel *channel = ObjectWrap::Unwrap<Channel>(info.This());
unique_ptr<OpVec> ops(new OpVec());
grpc_channel_watch_connectivity_state(
channel->wrapped_channel, last_state, MillisecondsToTimespec(deadline),