29 struct per_transfer {  struct
31   struct per_transfer *next;  argument
32   struct per_transfer *prev;  argument
33   struct OperationConfig *config; /* for this transfer */
34   CURL *curl;
35   long retry_numretries;
36   long retry_sleep_default;
37   long retry_sleep;
38   struct timeval retrystart;
39   char *this_url;
40   unsigned int urlnum; /* the index of the given URL */
41   char *outfile;
42   bool infdopen; /* TRUE if infd needs closing */
43   int infd;
44   bool noprogress;
45   struct ProgressData progressbar;
46   struct OutStruct outs;
47   struct OutStruct heads;
48   struct OutStruct etag_save;
49   struct InStruct input;
50   struct HdrCbData hdrcbdata;
51   long num_headers;
52   bool was_last_header_empty;
53   char errorbuffer[CURL_ERROR_SIZE];
55   bool added; /* set TRUE when added to the multi handle */
79 extern struct per_transfer *transfers; /* first node */  argument