[answered] how to get my IP address?

[mzimmers]

I know this is an absurdly simple question, but...I don't know how to determine the IP address I've been assigned by the DHCP server. I've seen some examples of how to do this in linux, but they aren't very portable. Does anyone have a simple technique for this?

Thanks.

[ESP_Sprite]

It's given to you in an event. See esp-idf/examples/wifi/simple_wifi/main/simple_wifi.c around line 50 for an example.

[mzimmers]

Ah, thank you Sprite. So is that the only way to get it, or can I retrieve it programmatically (for example, with a LWIP equivalent of ioctl/SIOCGIFADDR?

[kolban]

Howdy,
The function called "tcpip_adapter_get_ip_info" can be used to obtain your interface IP address, netmask and gateway. You can pass in TCPIP_ADAPTERE_IF_STA to get the information you desire.

[fly135]

This is provided in the event handler....

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        case SYSTEM_EVENT_STA_GOT_IP:
          eprintf(eLOG_EVENTQ,"SYSTEM_EVENT_STA_GOT_IP\r\n");
          eprintf(eLOG_EVENTQ,"Got IP: %s\r\n",
                   ip4addr_ntoa(&event->event_info.got_ip.ip_info.ip));

[mzimmers]

Hi Neil - yep, that did the trick. Code posted here for anyone else who might be interested (or for me since I'll probably forget).

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#include <tcpip_adapter.h>

tcpip_adapter_ip_info_t ipInfo; 
char str[256];
    	
// IP address.
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ipInfo);
sprintf(str, "%x", ipInfo.ip.addr);

[burkulesomesh43]

Hi Neil - yep, that did the trick. Code posted here for anyone else who might be interested (or for me since I'll probably forget).

Code: Select all

#include <tcpip_adapter.h>

tcpip_adapter_ip_info_t ipInfo; 
char str[256];
    	
// IP address.
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ipInfo);
sprintf(str, "%x", ipInfo.ip.addr);

I had printed this ip in str, it showing the value 8600a8c0.

[Vader_Mester]

Hi Neil - yep, that did the trick. Code posted here for anyone else who might be interested (or for me since I'll probably forget).

Code: Select all

#include <tcpip_adapter.h>

tcpip_adapter_ip_info_t ipInfo; 
char str[256];
    	
// IP address.
tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ipInfo);
sprintf(str, "%x", ipInfo.ip.addr);

I had printed this ip in str, it showing the value 8600a8c0.

If you used the same formating "%x", then you get the hex value. Try different formating.

[Resch2061]

You can print the IP address as octets as follows (from the top of my head):

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printf("My IP: " IPSTR "\n", IP2STR(&ipinfo.ip));

[burkulesomesh43]

You can print the IP address as octets as follows (from the top of my head):

Code: Select all

printf("My IP: " IPSTR "\n", IP2STR(&ipinfo.ip));

thank you. its working