alif: Integrate lwIP and mbedTLS.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

ports/alif/alif.mk

@@ -47,6 +47,7 @@ INC += -I$(ALIF_DFP_REL_HERE)/Device/core/$(MCU_CORE)/include/
 INC += -I$(ALIF_DFP_REL_HERE)/Device/$(MCU_SERIES)/$(MCU_VARIANT)/
 INC += -I$(TOP)/lib/tinyusb/src
 INC += -Itinyusb_port
+INC += -Ilwip_inc
 
 GEN_PIN_MKPINS = mcu/make-pins.py
 GEN_PIN_PREFIX = mcu/pins_prefix.c
@@ -122,6 +123,7 @@ SRC_C = \
 	main.c \
 	modalif.c \
 	mphalport.c \
+	mpnetworkport.c \
 	mpu.c \
 	mpuart.c \
 	msc_disk.c \
@@ -135,6 +137,10 @@ SRC_C = \
 	vfs_rom_ioctl.c \
 	$(wildcard $(BOARD_DIR)/*.c)
 
+ifeq ($(MICROPY_SSL_MBEDTLS),1)
+SRC_C += mbedtls/mbedtls_port.c
+endif
+
 ifeq ($(MICROPY_FLOAT_IMPL),float)
 LIBM_SRC_C += $(SRC_LIB_LIBM_C)
 LIBM_SRC_C += $(SRC_LIB_LIBM_SQRT_HW_C)
@@ -148,7 +154,6 @@ endif
 SHARED_SRC_C += $(addprefix shared/,\
 	libc/string0.c \
 	netutils/dhcpserver.c \
-	netutils/netutils.c \
 	netutils/trace.c \
 	readline/readline.c \
 	runtime/gchelper_native.c \

ports/alif/boards/manifest.py

@@ -3,3 +3,4 @@
 require("dht")
 require("neopixel")
 require("onewire")
+require("bundle-networking")

ports/alif/lwip_inc/arch/cc.h

@@ -0,0 +1,10 @@
+#ifndef MICROPY_INCLUDED_ALIF_LWIP_ARCH_CC_H
+#define MICROPY_INCLUDED_ALIF_LWIP_ARCH_CC_H
+
+#include <assert.h>
+#define LWIP_PLATFORM_DIAG(x)
+#define LWIP_PLATFORM_ASSERT(x)  { assert(1); }
+
+#define LWIP_NO_CTYPE_H 1
+
+#endif // MICROPY_INCLUDED_ALIF_LWIP_ARCH_CC_H

ports/alif/lwip_inc/arch/sys_arch.h

@@ -0,0 +1 @@
+// empty

ports/alif/lwip_inc/lwipopts.h

@@ -0,0 +1,60 @@
+#ifndef MICROPY_INCLUDED_ALIF_LWIP_LWIPOPTS_H
+#define MICROPY_INCLUDED_ALIF_LWIP_LWIPOPTS_H
+
+#include <stdint.h>
+
+// This protection is not needed, instead we execute all lwIP code at PendSV priority
+#define SYS_ARCH_DECL_PROTECT(lev) do { } while (0)
+#define SYS_ARCH_PROTECT(lev) do { } while (0)
+#define SYS_ARCH_UNPROTECT(lev) do { } while (0)
+
+#define NO_SYS                          1
+#define SYS_LIGHTWEIGHT_PROT            1
+#define MEM_ALIGNMENT                   4
+
+#define LWIP_CHKSUM_ALGORITHM           3
+#define LWIP_CHECKSUM_CTRL_PER_NETIF    1
+
+#define LWIP_ARP                        1
+#define LWIP_ETHERNET                   1
+#define LWIP_RAW                        1
+#define LWIP_NETCONN                    0
+#define LWIP_SOCKET                     0
+#define LWIP_STATS                      0
+#define LWIP_NETIF_HOSTNAME             1
+#define LWIP_NETIF_EXT_STATUS_CALLBACK  1
+
+#define LWIP_LOOPIF_MULTICAST           1
+#define LWIP_LOOPBACK_MAX_PBUFS         8
+
+#define LWIP_IPV6                       0
+#define LWIP_DHCP                       1
+#define LWIP_DHCP_CHECK_LINK_UP         1
+#define LWIP_DHCP_DOES_ACD_CHECK        0 // to speed DHCP up
+#define LWIP_DNS                        1
+#define LWIP_DNS_SUPPORT_MDNS_QUERIES   1
+#define LWIP_MDNS_RESPONDER             1
+#define LWIP_IGMP                       1
+
+#define LWIP_NUM_NETIF_CLIENT_DATA      LWIP_MDNS_RESPONDER
+#define MEMP_NUM_UDP_PCB                (4 + LWIP_MDNS_RESPONDER)
+#define MEMP_NUM_SYS_TIMEOUT            (LWIP_NUM_SYS_TIMEOUT_INTERNAL + LWIP_MDNS_RESPONDER)
+
+#define SO_REUSE                        1
+#define TCP_LISTEN_BACKLOG              1
+
+extern uint64_t se_services_rand64(void);
+#define LWIP_RAND() se_services_rand64()
+
+#define MEM_SIZE                        (16 * 1024)
+#define TCP_MSS                         (1460)
+#define TCP_OVERSIZE                    (TCP_MSS)
+#define TCP_WND                         (8 * TCP_MSS)
+#define TCP_SND_BUF                     (8 * TCP_MSS)
+#define TCP_SND_QUEUELEN                (2 * (TCP_SND_BUF / TCP_MSS))
+#define TCP_QUEUE_OOSEQ                 (1)
+#define MEMP_NUM_TCP_SEG                (2 * TCP_SND_QUEUELEN)
+
+typedef uint32_t sys_prot_t;
+
+#endif // MICROPY_INCLUDED_ALIF_LWIP_LWIPOPTS_H

ports/alif/main.c

@@ -30,6 +30,7 @@
 #include "py/mperrno.h"
 #include "py/mphal.h"
 #include "py/stackctrl.h"
+#include "extmod/modnetwork.h"
 #include "shared/readline/readline.h"
 #include "shared/runtime/gchelper.h"
 #include "shared/runtime/pyexec.h"
@@ -42,6 +43,11 @@
 #include "se_services.h"
 #include "system_tick.h"
 
+#if MICROPY_PY_LWIP
+#include "lwip/init.h"
+#include "lwip/apps/mdns.h"
+#endif
+
 extern uint8_t __StackTop, __StackLimit;
 extern uint8_t __GcHeapStart, __GcHeapEnd;
 
@@ -83,6 +89,17 @@ int main(void) {
     mp_stack_set_limit(&__StackTop - &__StackLimit - 1024);
     gc_init(&__GcHeapStart, &__GcHeapEnd);
 
+    #if MICROPY_PY_LWIP
+    // lwIP doesn't allow to reinitialise itself by subsequent calls to this function
+    // because the system timeout list (next_timeout) is only ever reset by BSS clearing.
+    // So for now we only init the lwIP stack once on power-up.
+    lwip_init();
+    #if LWIP_MDNS_RESPONDER
+    mdns_resp_init();
+    #endif
+    mod_network_lwip_init();
+    #endif
+
     for (;;) {
         // Initialise MicroPython runtime.
         mp_init();

ports/alif/mbedtls/mbedtls_config_port.h

@@ -0,0 +1,41 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2024-2025 OpenMV LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_MBEDTLS_CONFIG_H
+#define MICROPY_INCLUDED_MBEDTLS_CONFIG_H
+
+// Time hook.
+#include <time.h>
+extern time_t alif_mbedtls_time(time_t *timer);
+#define MBEDTLS_PLATFORM_TIME_MACRO alif_mbedtls_time
+#define MBEDTLS_PLATFORM_MS_TIME_ALT undefined_and_unused
+
+// Set MicroPython-specific options.
+#define MICROPY_MBEDTLS_CONFIG_BARE_METAL (1)
+
+// Include common mbedtls configuration.
+#include "extmod/mbedtls/mbedtls_config_common.h"
+
+#endif /* MICROPY_INCLUDED_MBEDTLS_CONFIG_H */

ports/alif/mbedtls/mbedtls_port.c

@@ -0,0 +1,65 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2024-2025 OpenMV LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/obj.h"
+#include "se_services.h"
+#include "mbedtls_config_port.h"
+
+#if defined(MBEDTLS_HAVE_TIME)
+#include "shared/timeutils/timeutils.h"
+#include "mbedtls/platform_time.h"
+#endif
+
+int mbedtls_hardware_poll(void *data, unsigned char *output, size_t len, size_t *olen) {
+    uint32_t val = 0;
+    int n = 0;
+    *olen = len;
+    while (len--) {
+        if (!n) {
+            val = se_services_rand64();
+            n = 4;
+        }
+        *output++ = val;
+        val >>= 8;
+        --n;
+    }
+    return 0;
+}
+
+#if defined(MBEDTLS_HAVE_TIME)
+
+time_t alif_mbedtls_time(time_t *timer) {
+    // TODO implement proper RTC time
+    unsigned int year = 2025;
+    unsigned int month = 1;
+    unsigned int date = 1;
+    unsigned int hours = 12;
+    unsigned int minutes = 0;
+    unsigned int seconds = 0;
+    return timeutils_seconds_since_epoch(year, month, date, hours, minutes, seconds);
+}
+
+#endif

ports/alif/mpconfigport.h

@@ -136,6 +136,10 @@
 #define MICROPY_PY_MACHINE_SPI                  (1)
 #define MICROPY_PY_MACHINE_SOFTSPI              (1)
 #define MICROPY_PY_MACHINE_TIMER                (1)
+#define MICROPY_PY_NETWORK                      (CORE_M55_HP)
+#ifndef MICROPY_PY_NETWORK_HOSTNAME_DEFAULT
+#define MICROPY_PY_NETWORK_HOSTNAME_DEFAULT     "mpy-alif"
+#endif
 #define MICROPY_VFS                             (1)
 #define MICROPY_VFS_ROM                         (1)
 

ports/alif/mphalport.c

@@ -38,6 +38,7 @@
 #include "tusb.h"
 #include "mpuart.h"
 #include "pendsv.h"
+#include "se_services.h"
 #include "system_tick.h"
 
 #ifndef MICROPY_HW_STDIN_BUFFER_LEN
@@ -237,3 +238,32 @@ void soft_timer_schedule_at_ms(uint32_t ticks_ms) {
 }
 
 #endif
+
+/*******************************************************************************/
+// MAC address
+
+// Generate a random locally administered MAC address (LAA)
+void mp_hal_generate_laa_mac(int idx, uint8_t buf[6]) {
+    uint8_t id[8];
+    se_services_get_unique_id(id);
+    buf[0] = 0x02; // LAA range
+    buf[1] = id[4];
+    buf[2] = id[3];
+    buf[3] = id[2];
+    buf[4] = id[1];
+    buf[5] = (id[0] << 2) | idx;
+}
+
+// A board can override this if needed
+MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) {
+    mp_hal_generate_laa_mac(idx, buf);
+}
+
+void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest) {
+    static const char hexchr[16] = "0123456789ABCDEF";
+    uint8_t mac[6];
+    mp_hal_get_mac(idx, mac);
+    for (; chr_len; ++chr_off, --chr_len) {
+        *dest++ = hexchr[mac[chr_off >> 1] >> (4 * (1 - (chr_off & 1))) & 0xf];
+    }
+}