c에서 curl 사용시 세션 유지방법에 대해 질문 입니다.

char* RequestHttpPostData(const char *url, char *field){
 Curl *curl;
 CURLcode res;
 
 curl = curl_easy_init();
 
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, url);
        curl_easy_setopt(curl, CURLOPT_POST, 1);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, field);
 
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, BaseHttp::WriteData);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data);
        res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            frCORE_ERROR(("curl_easy_perform() failed: %s", curl_easy_strerror(res)));
        }
        curl_easy_cleanup(curl);
 
    }
    char *result = new char[data.size+1];
    memset(result, 0x00, data.size+1);
    return result;
}