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https://github.com/esphome/esphome.git
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108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
#include "esphome/core/defines.h"
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#include "esphome/core/helpers.h"
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#include "socket.h"
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#ifdef USE_SOCKET_IMPL_BSD_SOCKETS
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#include <cstring>
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#include "esphome/core/application.h"
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#ifdef USE_HOST
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#include "esphome/core/wake.h"
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#endif
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namespace esphome::socket {
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BSDSocketImpl::BSDSocketImpl(int fd, bool monitor_loop) {
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this->fd_ = fd;
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if (this->fd_ < 0)
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return;
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#ifdef USE_HOST
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// Release listening ports on OTA re-exec.
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int flags = ::fcntl(this->fd_, F_GETFD, 0);
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if (flags >= 0)
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::fcntl(this->fd_, F_SETFD, flags | FD_CLOEXEC);
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#endif
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if (!monitor_loop)
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return;
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#ifdef USE_LWIP_FAST_SELECT
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this->cached_sock_ = hook_fd_for_fast_select(this->fd_);
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#else
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this->loop_monitored_ = wake_register_fd(this->fd_);
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#endif
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}
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BSDSocketImpl::~BSDSocketImpl() { this->close(); }
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int BSDSocketImpl::close() {
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if (this->fd_ < 0) {
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// Already closed, or never opened.
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return 0;
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}
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#ifdef USE_LWIP_FAST_SELECT
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// Null the cached lwip_sock pointer before closing. The underlying lwip slot can be
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// recycled for a new connection as soon as ::close() returns, so anything that might
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// dereference cached_sock_ post-close (e.g. setsockopt(TCP_NODELAY)) would otherwise
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// touch an unrelated socket's pcb. No per-socket callback unhook is needed —
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// all LwIP sockets share the same static event_callback.
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this->cached_sock_ = nullptr;
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#else
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if (this->loop_monitored_) {
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wake_unregister_fd(this->fd_);
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}
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#endif
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int ret = ::close(this->fd_);
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this->fd_ = -1; // Sentinel for "closed" — prevents double-close and makes use-after-close visible.
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return ret;
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}
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int BSDSocketImpl::setblocking(bool blocking) {
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int fl = ::fcntl(this->fd_, F_GETFL, 0);
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if (blocking) {
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fl &= ~O_NONBLOCK;
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} else {
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fl |= O_NONBLOCK;
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}
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::fcntl(this->fd_, F_SETFL, fl);
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return 0;
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}
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size_t BSDSocketImpl::getpeername_to(std::span<char, SOCKADDR_STR_LEN> buf) {
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struct sockaddr_storage storage;
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socklen_t len = sizeof(storage);
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if (this->getpeername(reinterpret_cast<struct sockaddr *>(&storage), &len) != 0) {
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buf[0] = '\0';
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return 0;
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}
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return format_sockaddr_to(reinterpret_cast<struct sockaddr *>(&storage), len, buf);
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}
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size_t BSDSocketImpl::getsockname_to(std::span<char, SOCKADDR_STR_LEN> buf) {
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struct sockaddr_storage storage;
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socklen_t len = sizeof(storage);
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if (this->getsockname(reinterpret_cast<struct sockaddr *>(&storage), &len) != 0) {
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buf[0] = '\0';
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return 0;
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}
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return format_sockaddr_to(reinterpret_cast<struct sockaddr *>(&storage), len, buf);
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}
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// Helper to create a socket with optional monitoring
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static std::unique_ptr<BSDSocketImpl> create_socket(int domain, int type, int protocol, bool loop_monitored = false) {
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int ret = ::socket(domain, type, protocol);
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if (ret == -1)
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return nullptr;
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return make_unique<BSDSocketImpl>(ret, loop_monitored);
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}
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std::unique_ptr<Socket> socket(int domain, int type, int protocol) {
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return create_socket(domain, type, protocol, false);
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}
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std::unique_ptr<Socket> socket_loop_monitored(int domain, int type, int protocol) {
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return create_socket(domain, type, protocol, true);
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}
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} // namespace esphome::socket
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#endif // USE_SOCKET_IMPL_BSD_SOCKETS
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