Get own IP address

[mglazzari-qinmotion]

Is there a way for the main program to obtain it own IP address of a server running in Mongoose?
If I set the listening address to 0.0.0.0 so Mongoose obtains an IP address from a DHCP server, how can I know what the IP address is, so that I can, for instance, show it on a display?
In case it is relevant, this is an STM32H7 platform.

[scaprile]

Please see our documentation, and follow the guidelines in our tutorials.

mongoose/examples/stm32/nucleo-h723zg-make-baremetal-builtin/main.c

Lines 84 to 93 in 9729693

	// Initialise Mongoose network stack
	struct mg_tcpip_driver_stm32h_data driver_data = {.mdc_cr = 4};
	struct mg_tcpip_if mif = {.mac = GENERATE_LOCALLY_ADMINISTERED_MAC(),
	// Uncomment below for static configuration:
	// .ip = mg_htonl(MG_U32(192, 168, 0, 223)),
	// .mask = mg_htonl(MG_U32(255, 255, 255, 0)),
	// .gw = mg_htonl(MG_U32(192, 168, 0, 1)),
	.driver = &mg_tcpip_driver_stm32h,
	.driver_data = &driver_data};
	mg_tcpip_init(&mgr, &mif);

If using auto-init code (Wizard):

mongoose/src/drivers/stm32h.h

Lines 39 to 53 in 9729693

	#define MG_TCPIP_DRIVER_INIT(mgr) \
	do { \
	static struct mg_tcpip_driver_stm32h_data driver_data_; \
	static struct mg_tcpip_if mif_; \
	driver_data_.mdc_cr = MG_DRIVER_MDC_CR; \
	driver_data_.phy_addr = MG_TCPIP_PHY_ADDR; \
	mif_.ip = MG_TCPIP_IP; \
	mif_.mask = MG_TCPIP_MASK; \
	mif_.gw = MG_TCPIP_GW; \
	mif_.driver = &mg_tcpip_driver_stm32h; \
	mif_.driver_data = &driver_data_; \
	MG_SET_MAC_ADDRESS(mif_.mac); \
	mg_tcpip_init(mgr, &mif_); \
	MG_INFO(("Driver: stm32h, MAC: %M", mg_print_mac, mif_.mac)); \
	} while (0)

then redefine macro above as you wish or cast mgr->priv->ip appropriately. e.g.:

mongoose/src/net_builtin.c

Lines 1124 to 1125 in 9729693

	void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
	struct mg_tcpip_if *ifp = (struct mg_tcpip_if *) mgr->priv;

mongoose/src/net_builtin.c

Lines 888 to 900 in 9729693

	static void mg_tcpip_poll(struct mg_tcpip_if *ifp, uint64_t now) {
	struct mg_connection *c;
	bool expired_1000ms = mg_timer_expired(&ifp->timer_1000ms, 1000, now);
	ifp->now = now;
	#if MG_ENABLE_TCPIP_PRINT_DEBUG_STATS
	if (expired_1000ms) {
	const char *names[] = {"down", "up", "req", "ready"};
	MG_INFO(("Status: %s, IP: %M, rx:%u, tx:%u, dr:%u, er:%u",
	names[ifp->state], mg_print_ip4, &ifp->ip, ifp->nrecv, ifp->nsent,
	ifp->ndrop, ifp->nerr));
	}
	#endif

[mglazzari-qinmotion]

OK, so I added this:

uint32_t mongoose_get_ip(){
	struct mg_tcpip_if *ifp = (struct mg_tcpip_if *) g_mgr.priv;
	return ifp->ip;
}

in mongoose_impl.c (one of the files generated by the wizard), and it works. Thanks!