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Consolidate write_raw_ implementation to reduce code duplication (#8717)

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J. Nick Koston 2025-05-08 19:10:44 -05:00 committed by GitHub
parent 782d748210
commit 8465017db9
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2 changed files with 107 additions and 148 deletions
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241
esphome/components/api/api_frame_helper.cpp
View File

@ -73,6 +73,91 @@ const char *api_error_to_str(APIError err) {
return "UNKNOWN";
}
// Common implementation for writing raw data to socket
template<typename StateEnum>
APIError APIFrameHelper::write_raw_(const struct iovec *iov, int iovcnt, socket::Socket *socket,
std::vector<uint8_t> &tx_buf, const std::string &info, StateEnum &state,
StateEnum failed_state) {
// This method writes data to socket or buffers it
// Returns APIError::OK if successful (or would block, but data has been buffered)
// Returns APIError::SOCKET_WRITE_FAILED if socket write failed, and sets state to failed_state
if (iovcnt == 0)
return APIError::OK; // Nothing to do, success
size_t total_write_len = 0;
for (int i = 0; i < iovcnt; i++) {
#ifdef HELPER_LOG_PACKETS
ESP_LOGVV(TAG, "Sending raw: %s",
format_hex_pretty(reinterpret_cast<uint8_t *>(iov[i].iov_base), iov[i].iov_len).c_str());
#endif
total_write_len += iov[i].iov_len;
}
if (!tx_buf.empty()) {
// try to empty tx_buf first
while (!tx_buf.empty()) {
ssize_t sent = socket->write(tx_buf.data(), tx_buf.size());
if (is_would_block(sent)) {
break;
} else if (sent == -1) {
ESP_LOGVV(TAG, "%s: Socket write failed with errno %d", info.c_str(), errno);
state = failed_state;
return APIError::SOCKET_WRITE_FAILED; // Socket write failed
}
// TODO: inefficient if multiple packets in txbuf
// replace with deque of buffers
tx_buf.erase(tx_buf.begin(), tx_buf.begin() + sent);
}
}
if (!tx_buf.empty()) {
// tx buf not empty, can't write now because then stream would be inconsistent
// Reserve space upfront to avoid multiple reallocations
tx_buf.reserve(tx_buf.size() + total_write_len);
for (int i = 0; i < iovcnt; i++) {
tx_buf.insert(tx_buf.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base),
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
}
return APIError::OK; // Success, data buffered
}
ssize_t sent = socket->writev(iov, iovcnt);
if (is_would_block(sent)) {
// operation would block, add buffer to tx_buf
// Reserve space upfront to avoid multiple reallocations
tx_buf.reserve(tx_buf.size() + total_write_len);
for (int i = 0; i < iovcnt; i++) {
tx_buf.insert(tx_buf.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base),
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
}
return APIError::OK; // Success, data buffered
} else if (sent == -1) {
// an error occurred
ESP_LOGVV(TAG, "%s: Socket write failed with errno %d", info.c_str(), errno);
state = failed_state;
return APIError::SOCKET_WRITE_FAILED; // Socket write failed
} else if ((size_t) sent != total_write_len) {
// partially sent, add end to tx_buf
size_t remaining = total_write_len - sent;
// Reserve space upfront to avoid multiple reallocations
tx_buf.reserve(tx_buf.size() + remaining);
size_t to_consume = sent;
for (int i = 0; i < iovcnt; i++) {
if (to_consume >= iov[i].iov_len) {
to_consume -= iov[i].iov_len;
} else {
tx_buf.insert(tx_buf.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base) + to_consume,
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
to_consume = 0;
}
}
return APIError::OK; // Success, data buffered
}
return APIError::OK; // Success, all data sent
}
#define HELPER_LOG(msg, ...) ESP_LOGVV(TAG, "%s: " msg, info_.c_str(), ##__VA_ARGS__)
// uncomment to log raw packets
//#define HELPER_LOG_PACKETS
@ -547,79 +632,6 @@ APIError APINoiseFrameHelper::try_send_tx_buf_() {
return APIError::OK;
}
/** Write the data to the socket, or buffer it a write would block
*
* @param data The data to write
* @param len The length of data
*/
APIError APINoiseFrameHelper::write_raw_(const struct iovec *iov, int iovcnt) {
if (iovcnt == 0)
return APIError::OK;
APIError aerr;
size_t total_write_len = 0;
for (int i = 0; i < iovcnt; i++) {
#ifdef HELPER_LOG_PACKETS
ESP_LOGVV(TAG, "Sending raw: %s",
format_hex_pretty(reinterpret_cast<uint8_t *>(iov[i].iov_base), iov[i].iov_len).c_str());
#endif
total_write_len += iov[i].iov_len;
}
if (!tx_buf_.empty()) {
// try to empty tx_buf_ first
aerr = try_send_tx_buf_();
if (aerr != APIError::OK && aerr != APIError::WOULD_BLOCK)
return aerr;
}
if (!tx_buf_.empty()) {
// tx buf not empty, can't write now because then stream would be inconsistent
// Reserve space upfront to avoid multiple reallocations
tx_buf_.reserve(tx_buf_.size() + total_write_len);
for (int i = 0; i < iovcnt; i++) {
tx_buf_.insert(tx_buf_.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base),
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
}
return APIError::OK;
}
ssize_t sent = socket_->writev(iov, iovcnt);
if (is_would_block(sent)) {
// operation would block, add buffer to tx_buf
// Reserve space upfront to avoid multiple reallocations
tx_buf_.reserve(tx_buf_.size() + total_write_len);
for (int i = 0; i < iovcnt; i++) {
tx_buf_.insert(tx_buf_.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base),
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
}
return APIError::OK;
} else if (sent == -1) {
// an error occurred
state_ = State::FAILED;
HELPER_LOG("Socket write failed with errno %d", errno);
return APIError::SOCKET_WRITE_FAILED;
} else if ((size_t) sent != total_write_len) {
// partially sent, add end to tx_buf
size_t remaining = total_write_len - sent;
// Reserve space upfront to avoid multiple reallocations
tx_buf_.reserve(tx_buf_.size() + remaining);
size_t to_consume = sent;
for (int i = 0; i < iovcnt; i++) {
if (to_consume >= iov[i].iov_len) {
to_consume -= iov[i].iov_len;
} else {
tx_buf_.insert(tx_buf_.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base) + to_consume,
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
to_consume = 0;
}
}
return APIError::OK;
}
// fully sent
return APIError::OK;
}
APIError APINoiseFrameHelper::write_frame_(const uint8_t *data, size_t len) {
uint8_t header[3];
header[0] = 0x01; // indicator
@ -753,6 +765,11 @@ void noise_rand_bytes(void *output, size_t len) {
}
}
}
// Explicit template instantiation for Noise
template APIError APIFrameHelper::write_raw_<APINoiseFrameHelper::State>(
const struct iovec *iov, int iovcnt, socket::Socket *socket, std::vector<uint8_t> &tx_buf_, const std::string &info,
APINoiseFrameHelper::State &state, APINoiseFrameHelper::State failed_state);
#endif // USE_API_NOISE
#ifdef USE_API_PLAINTEXT
@ -977,79 +994,6 @@ APIError APIPlaintextFrameHelper::try_send_tx_buf_() {
return APIError::OK;
}
/** Write the data to the socket, or buffer it a write would block
*
* @param data The data to write
* @param len The length of data
*/
APIError APIPlaintextFrameHelper::write_raw_(const struct iovec *iov, int iovcnt) {
if (iovcnt == 0)
return APIError::OK;
APIError aerr;
size_t total_write_len = 0;
for (int i = 0; i < iovcnt; i++) {
#ifdef HELPER_LOG_PACKETS
ESP_LOGVV(TAG, "Sending raw: %s",
format_hex_pretty(reinterpret_cast<uint8_t *>(iov[i].iov_base), iov[i].iov_len).c_str());
#endif
total_write_len += iov[i].iov_len;
}
if (!tx_buf_.empty()) {
// try to empty tx_buf_ first
aerr = try_send_tx_buf_();
if (aerr != APIError::OK && aerr != APIError::WOULD_BLOCK)
return aerr;
}
if (!tx_buf_.empty()) {
// tx buf not empty, can't write now because then stream would be inconsistent
// Reserve space upfront to avoid multiple reallocations
tx_buf_.reserve(tx_buf_.size() + total_write_len);
for (int i = 0; i < iovcnt; i++) {
tx_buf_.insert(tx_buf_.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base),
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
}
return APIError::OK;
}
ssize_t sent = socket_->writev(iov, iovcnt);
if (is_would_block(sent)) {
// operation would block, add buffer to tx_buf
// Reserve space upfront to avoid multiple reallocations
tx_buf_.reserve(tx_buf_.size() + total_write_len);
for (int i = 0; i < iovcnt; i++) {
tx_buf_.insert(tx_buf_.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base),
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
}
return APIError::OK;
} else if (sent == -1) {
// an error occurred
state_ = State::FAILED;
HELPER_LOG("Socket write failed with errno %d", errno);
return APIError::SOCKET_WRITE_FAILED;
} else if ((size_t) sent != total_write_len) {
// partially sent, add end to tx_buf
size_t remaining = total_write_len - sent;
// Reserve space upfront to avoid multiple reallocations
tx_buf_.reserve(tx_buf_.size() + remaining);
size_t to_consume = sent;
for (int i = 0; i < iovcnt; i++) {
if (to_consume >= iov[i].iov_len) {
to_consume -= iov[i].iov_len;
} else {
tx_buf_.insert(tx_buf_.end(), reinterpret_cast<uint8_t *>(iov[i].iov_base) + to_consume,
reinterpret_cast<uint8_t *>(iov[i].iov_base) + iov[i].iov_len);
to_consume = 0;
}
}
return APIError::OK;
}
// fully sent
return APIError::OK;
}
APIError APIPlaintextFrameHelper::close() {
state_ = State::CLOSED;
@ -1067,6 +1011,11 @@ APIError APIPlaintextFrameHelper::shutdown(int how) {
}
return APIError::OK;
}
// Explicit template instantiation for Plaintext
template APIError APIFrameHelper::write_raw_<APIPlaintextFrameHelper::State>(
const struct iovec *iov, int iovcnt, socket::Socket *socket, std::vector<uint8_t> &tx_buf_, const std::string &info,
APIPlaintextFrameHelper::State &state, APIPlaintextFrameHelper::State failed_state);
#endif // USE_API_PLAINTEXT
} // namespace api

14
esphome/components/api/api_frame_helper.h
View File

@ -72,6 +72,12 @@ class APIFrameHelper {
virtual APIError shutdown(int how) = 0;
// Give this helper a name for logging
virtual void set_log_info(std::string info) = 0;
protected:
// Common implementation for writing raw data to socket
template<typename StateEnum>
APIError write_raw_(const struct iovec *iov, int iovcnt, socket::Socket *socket, std::vector<uint8_t> &tx_buf,
const std::string &info, StateEnum &state, StateEnum failed_state);
};
#ifdef USE_API_NOISE
@ -103,7 +109,9 @@ class APINoiseFrameHelper : public APIFrameHelper {
APIError try_read_frame_(ParsedFrame *frame);
APIError try_send_tx_buf_();
APIError write_frame_(const uint8_t *data, size_t len);
APIError write_raw_(const struct iovec *iov, int iovcnt);
inline APIError write_raw_(const struct iovec *iov, int iovcnt) {
return APIFrameHelper::write_raw_(iov, iovcnt, socket_.get(), tx_buf_, info_, state_, State::FAILED);
}
APIError init_handshake_();
APIError check_handshake_finished_();
void send_explicit_handshake_reject_(const std::string &reason);
@ -164,7 +172,9 @@ class APIPlaintextFrameHelper : public APIFrameHelper {
APIError try_read_frame_(ParsedFrame *frame);
APIError try_send_tx_buf_();
APIError write_raw_(const struct iovec *iov, int iovcnt);
inline APIError write_raw_(const struct iovec *iov, int iovcnt) {
return APIFrameHelper::write_raw_(iov, iovcnt, socket_.get(), tx_buf_, info_, state_, State::FAILED);
}
std::unique_ptr<socket::Socket> socket_;