I am trying to encode a message using oneof
- and the size does not seem ok. Looks like this is ignoring the oneof
part - and not encoding it into the stream. The encoding functions all return "TRUE" - which means that they encoded as I requested, which means I encoded wrong... I am missing something very silly.
static auto encode(const pb_msgdesc_t *fields, const void *msg) -> std::vector<pb_byte_t>
{
size_t size = 0;
bool ok;
ok = pb_get_encoded_size(&size, fields, msg);
printf("pb_get_encoded_size=%d, Encoding data as %lx bytes\n", ok, size);
auto buff = std::vector<pb_byte_t>(size);
auto stream = pb_ostream_from_buffer(buff.data(), buff.size());
ok = pb_encode(&stream, fields, msg);
printf("pb_encode=%d, Encoding data as %lx bytes\n", ok, stream.bytes_written);
return buff;
}
auto nano_pb_test() -> void
{
std::vector<pb_byte_t> pb_res;
{
WifiCredResult2 wifi_result;
wifi_result.ip = (int32_t)3232235920; // https://www.browserling.com/tools/ip-to-dec -> 192.168.1.144
wifi_result.mac = { 6, { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35}};
ToAppMessage2 toAppMessage2 = ToAppMessage2_init_zero;
toAppMessage2.type = ToAppMessageType_CONNECT_WIFI_RESULT;
toAppMessage2.result = ToAppResultType_NETWORK_IS_LOCAL_ONLY;
toAppMessage2.esp_error = 0x7002;
toAppMessage2.which_payload = WifiCredResult2_ip_tag;
toAppMessage2.payload.wifi = wifi_result;
pb_res = encode(ToAppMessage2_fields, &toAppMessage2);
}
{
ToAppMessage2 toAppMessage3 = ToAppMessage2_init_zero;
toAppMessage3.payload.wifi.ip = 12;
pb_istream_t istream = pb_istream_from_buffer((const pb_byte_t *)pb_res.data(), pb_res.size());
if (!pb_decode(&istream, ToAppMessage2_fields, &toAppMessage3)) {
printf("nanopb failed parsing:\n");
} else {
printf("result = %d, esp: %x, ip=%d\n", toAppMessage3.result, toAppMessage3.esp_error, toAppMessage3.payload.wifi.ip);
}
}
}
The protobuff (parts of..)
enum ToAppMessageType {
...
}
enum ToAppResultType {
...
}
message Details {
string project_id = 1;
string url1 = 2;
string url2 = 5;
}
message Result2 {
int32 ip = 1;
bytes mac = 2;
}
message ToAppMessage2 {
ToAppMessageType type = 1;
ToAppResultType result = 2;
int32 error = 3;
oneof payload {
WifiCredResult2 wifi = 4;
PairResult pair = 5;
}
}
Options file:
WifiCredResult2.mac max_size:6
CodePudding user response:
I think your problem is here:
toAppMessage2.which_payload = WifiCredResult2_ip_tag;
This would indicate that your payload
oneof contains an item of type WifiCredResult2.ip
, but there is no such item in that oneof so nothing gets encoded. It appears you want instead:
toAppMessage2.which_payload = ToAppMessage2_wifi_tag;