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/**
* Localchat
* Ben Burwell
*
* Gets host IP
*/
void get_own_ip() {
char name_buf[256];
unsigned int buf_len = 256;
struct hostent *host;
int ret_code;
struct addrinfo hints;
struct addrinfo *result;
struct addrinfo *rptr; // Pointer to linked list.
struct sockaddr_in *ipv4;
void * addr;
char ipstr[64];
// Get the name of the host.
ret_code = gethostname(name_buf, buf_len);
if (ret_code < 0) {
exit(1);
}
if (strcmp(name_buf, "mathcs") == 0) {
strcpy(my_ip, "192.168.130.10");
} else {
// Get the IP addresses of this host.
memset((void *) &hints, 0, (size_t) sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
hints.ai_protocol = 0;
hints.ai_addr = NULL;
hints.ai_next = NULL;
ret_code = getaddrinfo(name_buf, NULL, &hints, &result);
if (ret_code != 0) {
perror("Error from getaddrinfo\n");
exit(1);
}
rptr = result;
while (rptr != NULL) {
ipv4 = (struct sockaddr_in *) rptr->ai_addr;
addr = &(ipv4->sin_addr);
inet_ntop(rptr->ai_family, addr, ipstr, sizeof(ipstr));
rptr = rptr->ai_next;
}
strcpy(my_ip, ipstr);
freeaddrinfo(result); // free the linked list
}
return;
}
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