void start_peers() {
CURL *curl;
CURLcode res;
curl = curl_easy_init();
{
int bytes_left = 0;
bytes_left = missing_blocks() * piece_length;
if(piece_status[get_total_pieces_available()-1] == PIECE_EMPTY){
bytes_left -= piece_length;
bytes_left += file_length%piece_length;
}
printf("Announce URL: %s\n",announce_url);
}
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, announce_url);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 1);
FILE *anno = fopen("/tmp/anno.tmp","w+");
if(!anno) {
perror("couldn't create temporary file\n");
}
int attempts=0;
curl_easy_setopt(curl, CURLOPT_WRITEDATA, anno);
while((res = curl_easy_perform(curl)) !=CURLE_OK &&
attempts < 5) {
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
attempts++;
}
fclose(anno);
if (attempts<5) {
struct stat anno_stat;
if(stat("/tmp/anno.tmp",&anno_stat)) {
perror("couldn't stat /tmp/anno.tmp");
exit(1);
}
// the announcement document is in /tmp/anno.tmp.
// so map that into memory, then call handle_announcement on the returned pointer
handle_announcement(mmap(0,anno_stat.st_size,PROT_READ,MAP_SHARED,open("/tmp/anno.tmp",O_RDONLY),0),anno_stat.st_size);
}
curl_easy_cleanup(curl);
}
}
/* contact the tracker to get announcement, call handle_announcement on the result */
void start_peers() {
/* download the announcement document using libcurl */
CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, announce_url);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, 1);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 1);
FILE *anno = fopen("/tmp/anno_meg.tmp","w+");
if(!anno) {
perror("couldn't create temporary file\n");
}
int attempts=0;
curl_easy_setopt(curl, CURLOPT_WRITEDATA, anno);
while((res = curl_easy_perform(curl)) !=CURLE_OK &&
attempts < 5) {
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
attempts++;
}
fclose(anno);
if (attempts<5) {
struct stat anno_stat;
if(stat("/tmp/anno_meg.tmp",&anno_stat)) { // put the results of the stat call into anno_stat
perror("couldn't stat /tmp/anno_meg.tmp");
exit(1);
}
// map .tmp file into memory, then call handle_announcement on the returned pointer
handle_announcement(mmap(0,anno_stat.st_size,PROT_READ,MAP_SHARED,open("/tmp/anno_meg.tmp",O_RDONLY),0),anno_stat.st_size);
}
curl_easy_cleanup(curl);
}
}