C에서 Linux 서버의 IP 주소를 프로그래밍 방식으로 어떻게 확인할 수 있습니까?

#include <stdio.h>
#include <sys/types.h>
#include <ifaddrs.h>

int main() {
    struct ifaddrs *ifAddrStruct = NULL;
    struct ifaddrs *ifa = NULL;
    void *tmpAddrPtr = NULL;

    getifaddrs(&ifAddrStruct);

    for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
        if (!ifa->ifa_addr) {
            continue;
        }
        if (ifa->ifa_addr->sa_family == AF_INET) { // IPv4 address
            tmpAddrPtr = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
            char addressBuffer[INET_ADDRSTRLEN];
            inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
            printf("IPv4 Address %s\n", addressBuffer);
        } else if (ifa->ifa_addr->sa_family == AF_INET6) { // IPv6 address
            tmpAddrPtr = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
            char addressBuffer[INET6_ADDRSTRLEN];
            inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
            printf("IPv6 Address %s\n", addressBuffer);
        }
    }

    if (ifAddrStruct != NULL) {
        freeifaddrs(ifAddrStruct);
    }

    return 0;
}