fetch value of ipaddress

Question

i want to get ipaddress of mycomputer in a variable this statement prints ipaddress of my computer but i want to assign it in a varible how can i fetch the value of ipaddress from inet_ntoa(inaddrr(ifr_addr.sa_data)) into an variable ip of char* type .

printf("IP Address: %s\n", inet_ntoa(inaddrr(ifr_addr.sa_data)));

As we pointed out the last three times you asked this, it's a duplicate. Read the answer we linked to when we closed it. — Paul Tomblin, Apr 01 '10 at 12:07
possible duplicate of http://stackoverflow.com/questions/485769/how-do-i-find-a-computers-ip-address — Paul Tomblin, Apr 01 '10 at 12:08
http://stackoverflow.com/questions/917332/getting-my-ip-address — Paul Tomblin, Apr 01 '10 at 12:08
http://stackoverflow.com/questions/212528/linux-c-get-the-ip-address-of-local-computer — Paul Tomblin, Apr 01 '10 at 12:09
This isn't actually a duplicate of those questions - it's really a more basic C question. — caf, Apr 01 '10 at 12:38

score 2 · Answer 1 · answered Apr 01 '10 at 12:41

inet_ntoa already returns a char * - it's just that it points to a static buffer, which will be overwritten on subsequent calls. If you want to save that pointed-to string, you can just use strdup():

char *ip;
/* ... */
ip = strdup(inet_ntoa(inaddrr(ifr_addr.sa_data)));

You should call free() on ip when you are done with it.

fetch value of ipaddress

1 Answers1