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Handle downloading VPN database better, avoiding situation where it could query ips without the list downloaded

This commit is contained in:
Wizzard 2024-03-08 07:06:03 -05:00
parent b3eef56fe2
commit b2a56aff51
1 changed files with 15 additions and 6 deletions
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21
src/main.c
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@ -54,17 +54,19 @@ static size_t write_data(void *ptr, size_t size, size_t nmemb, FILE *stream) {
return written;
}
void download_vpn_list(const char *url, const char *output_path) {
int download_vpn_list(const char *url, const char *output_path) {
CURL *curl;
FILE *fp;
CURLcode res;
int result = 1; // Assume failure
curl = curl_easy_init();
if (curl) {
fp = fopen(output_path, "wb");
if (fp == NULL) {
fprintf(stderr, "Cannot open file %s\n", output_path);
return;
curl_easy_cleanup(curl);
return result;
}
curl_easy_setopt(curl, CURLOPT_URL, url);
@ -72,13 +74,16 @@ void download_vpn_list(const char *url, const char *output_path) {
curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
res = curl_easy_perform(curl);
if (res != CURLE_OK) {
if (res == CURLE_OK) {
result = 0; // Success
} else {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
fclose(fp);
curl_easy_cleanup(curl);
}
return result;
}
static size_t write_callback(void *contents, size_t size, size_t nmemb, void *userp) {
@ -89,14 +94,18 @@ static size_t write_callback(void *contents, size_t size, size_t nmemb, void *us
}
int main(int argc, char *argv[]) {
int vpnCheck = is_vpn(argv[1]);
download_vpn_list(VPN_LIST_URL, VPN_LIST_PATH);
if (argc != 2) {
printf("Usage: %s <IP_ADDRESS>\n", argv[0]);
return 1;
}
if (download_vpn_list(VPN_LIST_URL, VPN_LIST_PATH) != 0) {
fprintf(stderr, "Failed to download VPN list.\n");
return 1;
}
int vpnCheck = is_vpn(argv[1]);
char url[256] = "http://ip-api.com/json/";
strcat(url, argv[1]);