reduce connection footprint and fix recv

Author: tannewt

ports/esp32s2/common-hal/socketpool/Socket.c

@@ -79,43 +79,41 @@ mp_uint_t common_hal_socketpool_socket_send(socketpool_socket_obj_t* self, const
 
 mp_uint_t common_hal_socketpool_socket_recv_into(socketpool_socket_obj_t* self, const uint8_t* buf, mp_uint_t len) {
     size_t received = 0;
-    ssize_t last_read = 1;
+    int status = 0;
     uint64_t start_ticks = supervisor_ticks_ms64();
     int sockfd;
     esp_err_t err = esp_tls_get_conn_sockfd(self->tcp, &sockfd);
     if (err != ESP_OK) {
         mp_raise_OSError(MP_EBADF);
     }
-    while (received < len &&
-           last_read > 0 &&
+    while (received == 0 &&
+           status >= 0 &&
            (self->timeout_ms == 0 || supervisor_ticks_ms64() - start_ticks <= self->timeout_ms) &&
            !mp_hal_is_interrupted()) {
         RUN_BACKGROUND_TASKS;
         size_t available = esp_tls_get_bytes_avail(self->tcp);
         if (available == 0) {
             // This reads the raw socket buffer and is used for non-TLS connections
             // and between encrypted TLS blocks.
-            int status = lwip_ioctl(sockfd, FIONREAD, &available);
-            if (status < 0) {
-                last_read = status;
-                break;
-            }
+            status = lwip_ioctl(sockfd, FIONREAD, &available);
         }
         size_t remaining = len - received;
         if (available > remaining) {
             available = remaining;
         }
         if (available > 0) {
-            last_read = esp_tls_conn_read(self->tcp, (void*) buf + received, available);
-            received += last_read;
+            status = esp_tls_conn_read(self->tcp, (void*) buf + received, available);
+            if (status > 0) {
+                received += status;
+            }
         }
     }
 
-    if (last_read == 0) {
+    if (received == 0) {
         // socket closed
         common_hal_socketpool_socket_close(self);
     }
-    if (last_read < 0) {
+    if (status < 0) {
         mp_raise_BrokenPipeError();
     }
     return received;

ports/esp32s2/esp-idf-config/sdkconfig.defaults

@@ -135,6 +135,7 @@ CONFIG_COMPILER_STACK_CHECK_MODE_NONE=y
 # CONFIG_COMPILER_STACK_CHECK_MODE_ALL is not set
 # CONFIG_COMPILER_WARN_WRITE_STRINGS is not set
 # CONFIG_COMPILER_DISABLE_GCC8_WARNINGS is not set
+# CONFIG_COMPILER_DUMP_RTL_FILES is not set
 # end of Compiler options
 
 #
@@ -332,12 +333,13 @@ CONFIG_ESP_TIMER_IMPL_SYSTIMER=y
 #
 # Wi-Fi
 #
-CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM=10
-CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM=32
+CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM=4
+CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM=8
 # CONFIG_ESP32_WIFI_STATIC_TX_BUFFER is not set
 CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER=y
 CONFIG_ESP32_WIFI_TX_BUFFER_TYPE=1
-CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM=32
+CONFIG_ESP32_WIFI_CACHE_TX_BUFFER_NUM=16
+CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM=16
 # CONFIG_ESP32_WIFI_CSI_ENABLED is not set
 CONFIG_ESP32_WIFI_AMPDU_TX_ENABLED=y
 CONFIG_ESP32_WIFI_TX_BA_WIN=6
@@ -439,7 +441,7 @@ CONFIG_LWIP_DNS_SUPPORT_MDNS_QUERIES=y
 # CONFIG_LWIP_L2_TO_L3_COPY is not set
 # CONFIG_LWIP_IRAM_OPTIMIZATION is not set
 CONFIG_LWIP_TIMERS_ONDEMAND=y
-CONFIG_LWIP_MAX_SOCKETS=10
+CONFIG_LWIP_MAX_SOCKETS=4
 # CONFIG_LWIP_USE_ONLY_LWIP_SELECT is not set
 # CONFIG_LWIP_SO_LINGER is not set
 CONFIG_LWIP_SO_REUSE=y
@@ -459,6 +461,9 @@ CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=32
 CONFIG_LWIP_DHCP_DOES_ARP_CHECK=y
 # CONFIG_LWIP_DHCP_RESTORE_LAST_IP is not set
 
+#
+# CONFIG_FREERTOS_PLACE_FUNCTIONS_INTO_FLASH is not set
+
 #
 # DHCP server
 #
@@ -474,15 +479,15 @@ CONFIG_LWIP_LOOPBACK_MAX_PBUFS=8
 #
 # TCP
 #
-CONFIG_LWIP_MAX_ACTIVE_TCP=16
-CONFIG_LWIP_MAX_LISTENING_TCP=16
+CONFIG_LWIP_MAX_ACTIVE_TCP=4
+CONFIG_LWIP_MAX_LISTENING_TCP=4
 CONFIG_LWIP_TCP_MAXRTX=12
 CONFIG_LWIP_TCP_SYNMAXRTX=6
 CONFIG_LWIP_TCP_MSS=1440
 CONFIG_LWIP_TCP_TMR_INTERVAL=250
 CONFIG_LWIP_TCP_MSL=60000
-CONFIG_LWIP_TCP_SND_BUF_DEFAULT=5744
-CONFIG_LWIP_TCP_WND_DEFAULT=5744
+CONFIG_LWIP_TCP_SND_BUF_DEFAULT=2880
+CONFIG_LWIP_TCP_WND_DEFAULT=2880
 CONFIG_LWIP_TCP_RECVMBOX_SIZE=6
 CONFIG_LWIP_TCP_QUEUE_OOSEQ=y
 # CONFIG_LWIP_TCP_SACK_OUT is not set
@@ -505,6 +510,8 @@ CONFIG_LWIP_TCPIP_TASK_AFFINITY_NO_AFFINITY=y
 # CONFIG_LWIP_TCPIP_TASK_AFFINITY_CPU0 is not set
 CONFIG_LWIP_TCPIP_TASK_AFFINITY=0x7FFFFFFF
 # CONFIG_LWIP_PPP_SUPPORT is not set
+CONFIG_LWIP_IPV6_MEMP_NUM_ND6_QUEUE=3
+CONFIG_LWIP_IPV6_ND6_NUM_NEIGHBORS=5
 # CONFIG_LWIP_SLIP_SUPPORT is not set
 
 #
@@ -552,8 +559,10 @@ CONFIG_MBEDTLS_INTERNAL_MEM_ALLOC=y
 # CONFIG_MBEDTLS_CUSTOM_MEM_ALLOC is not set
 CONFIG_MBEDTLS_ASYMMETRIC_CONTENT_LEN=y
 CONFIG_MBEDTLS_SSL_IN_CONTENT_LEN=16384
-CONFIG_MBEDTLS_SSL_OUT_CONTENT_LEN=4096
-# CONFIG_MBEDTLS_DYNAMIC_BUFFER is not set
+CONFIG_MBEDTLS_SSL_OUT_CONTENT_LEN=2048
+CONFIG_MBEDTLS_DYNAMIC_BUFFER=y
+CONFIG_MBEDTLS_DYNAMIC_FREE_PEER_CERT=y
+CONFIG_MBEDTLS_DYNAMIC_FREE_CONFIG_DATA=y
 # CONFIG_MBEDTLS_DEBUG is not set
 
 #
@@ -824,8 +833,8 @@ CONFIG_TCP_MAXRTX=12
 CONFIG_TCP_SYNMAXRTX=6
 CONFIG_TCP_MSS=1440
 CONFIG_TCP_MSL=60000
-CONFIG_TCP_SND_BUF_DEFAULT=5744
-CONFIG_TCP_WND_DEFAULT=5744
+CONFIG_TCP_SND_BUF_DEFAULT=2880
+CONFIG_TCP_WND_DEFAULT=2880
 CONFIG_TCP_RECVMBOX_SIZE=6
 CONFIG_TCP_QUEUE_OOSEQ=y
 # CONFIG_ESP_TCP_KEEP_CONNECTION_WHEN_IP_CHANGES is not set