Ubuntu 16.04下，可编译通过：
#include <stdio.h>
#include <ifaddrs.h>
#include <arpa/inet.h>
#include <cstring> #define MAX_LENGTH 254 int main(void)
{
char ipAddr[MAX_LENGTH]; ipAddr[] = '\0'; struct ifaddrs * ifAddrStruct = NULL;
void * tmpAddrPtr = NULL; if (getifaddrs(&ifAddrStruct) != )
{
//if wrong, go out!
printf("Somting is Wrong!\n");
return -;
} struct ifaddrs * iter = ifAddrStruct; while (iter != NULL) {
if (iter->ifa_addr->sa_family == AF_INET) { //if ip4
// is a valid IP4 Address
tmpAddrPtr = &((struct sockaddr_in *)iter->ifa_addr)->sin_addr;
char addressBuffer[INET_ADDRSTRLEN];
inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
if (strlen(ipAddr) + strlen(addressBuffer) < MAX_LENGTH - )
{
if (strlen(ipAddr) > )
{
strcat(ipAddr, ";");
}
strcat(ipAddr, addressBuffer);
}
else
{
printf("Too many ips!\n");
break;
}
}
//else if (ifaddrstruct->ifa_addr->sa_family == af_inet6) { // check it is ip6 /* deal ip6 addr */
// tmpaddrptr = &((struct sockaddr_in *)ifaddrstruct->ifa_addr)->sin_addr;
// char addressbuffer[inet6_addrstrlen];
// inet_ntop(af_inet6, tmpaddrptr, addressbuffer, inet6_addrstrlen); //}
iter = iter->ifa_next;
}
//releas the struct
freeifaddrs(ifAddrStruct); printf("The ips: %s\n", ipAddr); return ;
}
效果：