#pragma once #include class GwSocketHelper{ public: static bool setKeepAlive(int socket, bool noDelay=true){ int val=1; if (noDelay){ if (setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(int)) != ESP_OK) return false; } if (setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE, (char *)&val, sizeof(int)) != ESP_OK) return false; val = 10; // seconds of idleness before first keepalive probe if (setsockopt(socket, IPPROTO_TCP, TCP_KEEPIDLE, &val, sizeof(val)) != ESP_OK) return false; val = 5; // interval between first and subsequent keepalives if (setsockopt(socket, IPPROTO_TCP, TCP_KEEPINTVL, &val, sizeof(val)) != ESP_OK) return false; val = 4; // number of lost keepalives before we close the socket if (setsockopt(socket, IPPROTO_TCP, TCP_KEEPCNT, &val, sizeof(val)) != ESP_OK) return false; return true; } };