donde coloco la ip en struct sockaddr_in serv_addr;

void setServerAddr(struct sockaddr_in serv_addr, char *ip, int port) {
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(port); 
    inet_pton(AF_INET, ip, &serv_addr.sin_addr);
}