int getListedChunks(int csock, FILE *fd, char *chunks, char *p_ad, char *p_hid)
{
ChunkStatus cs[NUM_CHUNKS];
char data[XIA_MAXCHUNK];
int len;
int status;
int n = -1;
n = buildChunkDAGs(cs, chunks, p_ad, p_hid);
// NOTE: the chunk transport is not currently reliable and chunks may need to be re-requested
// ask for the current chunk list again every REREQUEST seconds
// chunks already in the local cache will not be refetched from the network
unsigned ctr = 0;
while (1) {
if (ctr % REREQUEST == 0) {
// bring the list of chunks local
say("%srequesting list of %d chunks\n", (ctr == 0 ? "" : "re-"), n);
if (XrequestChunks(csock, cs, n) < 0) {
say("unable to request chunks\n");
return -1;
}
say("checking chunk status\n");
ctr++;
}
status = XgetChunkStatuses(csock, cs, n);
if (status == READY_TO_READ)
break;
else if (status < 0) {
say("error getting chunk status\n");
return -1;
} else if (status & WAITING_FOR_CHUNK) {
// one or more chunks aren't ready.
say("waiting... one or more chunks aren't ready yet\n");
} else if (status & INVALID_HASH) {
die(-1, "one or more chunks has an invalid hash");
} else if (status & REQUEST_FAILED) {
die(-1, "no chunks found\n");
} else {
say("unexpected result\n");
}
sleep(1);
}
say("all chunks ready\n");
for (int i = 0; i < n; i++) {
char *cid = strrchr(cs[i].cid, ':');
cid++;
say("reading chunk %s\n", cid);
if ((len = XreadChunk(csock, data, sizeof(data), 0, cs[i].cid, cs[i].cidLen)) < 0) {
say("error getting chunk\n");
return -1;
}
// write the chunk to disk
// say("writing %d bytes of chunk %s to disk\n", len, cid);
fwrite(data, 1, len, fd);
free(cs[i].cid);
cs[i].cid = NULL;
cs[i].cidLen = 0;
}
return n;
}
int getListedChunks(int csock, FILE *fd, char *chunks, char *p_ad, char *p_hid)
{
ChunkStatus cs[NUM_CHUNKS];
char data[XIA_MAXCHUNK];
int len;
int status;
int n = -1;
n = buildChunkDAGs(cs, chunks, p_ad, p_hid);
// bring the list of chunks local
say("requesting list of %d chunks\n", n);
if (XrequestChunks(csock, cs, n) < 0) {
say("unable to request chunks\n");
return -1;
}
say("checking chunk status\n");
while (1) {
status = XgetChunkStatuses(csock, cs, n);
if (status == READY_TO_READ)
break;
else if (status < 0) {
say("error getting chunk status\n");
return -1;
} else if (status & WAITING_FOR_CHUNK) {
// one or more chunks aren't ready.
say("waiting... one or more chunks aren't ready yet\n");
} else if (status & INVALID_HASH) {
die(-1, "one or more chunks has an invalid hash");
} else if (status & REQUEST_FAILED) {
die(-1, "no chunks found\n");
} else {
say("unexpected result\n");
}
sleep(1);
}
say("all chunks ready\n");
for (int i = 0; i < n; i++) {
char *cid = strrchr(cs[i].cid, ':');
cid++;
say("reading chunk %s\n", cid);
if ((len = XreadChunk(csock, data, sizeof(data), 0, cs[i].cid, cs[i].cidLen)) < 0) {
say("error getting chunk\n");
return -1;
}
// write the chunk to disk
// say("writing %d bytes of chunk %s to disk\n", len, cid);
fwrite(data, 1, len, fd);
free(cs[i].cid);
cs[i].cid = NULL;
cs[i].cidLen = 0;
}
return n;
}