108 lines
4.6 KiB
C++
108 lines
4.6 KiB
C++
#pragma once
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#include "esphome/core/defines.h"
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#ifdef USE_SOCKET_IMPL_LWIP_SOCKETS
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#include <memory>
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#include <span>
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#include "esphome/core/helpers.h"
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#include "headers.h"
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#ifdef USE_LWIP_FAST_SELECT
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#include "esphome/core/lwip_fast_select.h"
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#endif
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namespace esphome::socket {
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class LwIPSocketImpl {
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public:
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LwIPSocketImpl(int fd, bool monitor_loop = false);
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~LwIPSocketImpl();
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LwIPSocketImpl(const LwIPSocketImpl &) = delete;
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LwIPSocketImpl &operator=(const LwIPSocketImpl &) = delete;
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int connect(const struct sockaddr *addr, socklen_t addrlen) { return lwip_connect(this->fd_, addr, addrlen); }
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std::unique_ptr<LwIPSocketImpl> accept(struct sockaddr *addr, socklen_t *addrlen) {
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int fd = lwip_accept(this->fd_, addr, addrlen);
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if (fd == -1)
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return {};
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return make_unique<LwIPSocketImpl>(fd, false);
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}
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std::unique_ptr<LwIPSocketImpl> accept_loop_monitored(struct sockaddr *addr, socklen_t *addrlen) {
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int fd = lwip_accept(this->fd_, addr, addrlen);
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if (fd == -1)
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return {};
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return make_unique<LwIPSocketImpl>(fd, true);
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}
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int bind(const struct sockaddr *addr, socklen_t addrlen) { return lwip_bind(this->fd_, addr, addrlen); }
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int close();
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int shutdown(int how) { return lwip_shutdown(this->fd_, how); }
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int getpeername(struct sockaddr *addr, socklen_t *addrlen) { return lwip_getpeername(this->fd_, addr, addrlen); }
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int getsockname(struct sockaddr *addr, socklen_t *addrlen) { return lwip_getsockname(this->fd_, addr, addrlen); }
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/// Format peer address into a fixed-size buffer (no heap allocation)
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size_t getpeername_to(std::span<char, SOCKADDR_STR_LEN> buf);
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/// Format local address into a fixed-size buffer (no heap allocation)
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size_t getsockname_to(std::span<char, SOCKADDR_STR_LEN> buf);
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int getsockopt(int level, int optname, void *optval, socklen_t *optlen) {
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return lwip_getsockopt(this->fd_, level, optname, optval, optlen);
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}
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int setsockopt(int level, int optname, const void *optval, socklen_t optlen) {
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#if defined(USE_LWIP_FAST_SELECT) && defined(CONFIG_LWIP_TCPIP_CORE_LOCKING)
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// Fast path for TCP_NODELAY: directly set the pcb flag under the TCPIP core lock,
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// bypassing lwip_setsockopt overhead (socket lookups, hook, switch cascade, refcounting).
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if (level == IPPROTO_TCP && optname == TCP_NODELAY && optlen == sizeof(int) && optval != nullptr) {
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LwIPLock lock;
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if (esphome_lwip_set_nodelay(this->cached_sock_, *reinterpret_cast<const int *>(optval) != 0))
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return 0;
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}
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#endif
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return lwip_setsockopt(this->fd_, level, optname, optval, optlen);
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}
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int listen(int backlog) { return lwip_listen(this->fd_, backlog); }
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ssize_t read(void *buf, size_t len) { return lwip_read(this->fd_, buf, len); }
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ssize_t recvfrom(void *buf, size_t len, sockaddr *addr, socklen_t *addr_len) {
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return lwip_recvfrom(this->fd_, buf, len, 0, addr, addr_len);
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}
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ssize_t readv(const struct iovec *iov, int iovcnt) { return lwip_readv(this->fd_, iov, iovcnt); }
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ssize_t write(const void *buf, size_t len) { return lwip_write(this->fd_, buf, len); }
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ssize_t send(const void *buf, size_t len, int flags) { return lwip_send(this->fd_, buf, len, flags); }
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ssize_t writev(const struct iovec *iov, int iovcnt) { return lwip_writev(this->fd_, iov, iovcnt); }
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ssize_t sendto(const void *buf, size_t len, int flags, const struct sockaddr *to, socklen_t tolen) {
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return lwip_sendto(this->fd_, buf, len, flags, to, tolen);
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}
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int setblocking(bool blocking);
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int loop() { return 0; }
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/// Check if the socket has buffered data ready to read.
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/// See the ready() contract in socket.h — callers must drain or track remaining data.
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bool ready() const;
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int get_fd() const { return this->fd_; }
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protected:
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// fd_ < 0 means "not open" — used both pre-open (initial state) and post-close. This
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// replaces a separate closed_ flag: close() sets fd_ = -1 after lwip_close(), and the
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// destructor / double-close path just check fd_ < 0.
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int fd_{-1};
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#ifdef USE_LWIP_FAST_SELECT
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// Cached lwip_sock pointer used for direct rcvevent reads in ready() on the
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// fast-select path. Replaces loop_monitored_: null means this socket is not being
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// monitored for read events — either monitoring was not requested, the fd was
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// invalid, or esphome_lwip_get_sock() failed. Non-null means the netconn event
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// callback was hooked and notifications are flowing. close() nulls this to prevent
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// use-after-free via a recycled lwip slot.
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struct lwip_sock *cached_sock_{nullptr};
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#else
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bool loop_monitored_{false};
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#endif
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};
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} // namespace esphome::socket
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#endif // USE_SOCKET_IMPL_LWIP_SOCKETS
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