void
ccnl_populate_cache(struct ccnl_relay_s *ccnl, char *path)
{
DIR *dir;
struct dirent *de;
dir = opendir(path);
if (!dir) {
DEBUGMSG(ERROR, "could not open directory %s\n", path);
return;
}
DEBUGMSG(INFO, "populating cache from directory %s\n", path);
while ((de = readdir(dir))) {
char fname[1000];
struct stat s;
struct ccnl_buf_s *buf = 0; // , *nonce=0, *ppkd=0, *pkt = 0;
struct ccnl_content_s *c = 0;
int fd, datalen, suite, skip;
unsigned char *data;
(void) data; // silence compiler warning (if any USE_SUITE_* is not set)
#if defined(USE_SUITE_IOTTLV) || defined(USE_SUITE_NDNTLV)
unsigned int typ;
int len;
#endif
struct ccnl_pkt_s *pk;
if (de->d_name[0] == '.')
continue;
strcpy(fname, path);
strcat(fname, "/");
strcat(fname, de->d_name);
if (stat(fname, &s)) {
perror("stat");
continue;
}
if (S_ISDIR(s.st_mode))
continue;
DEBUGMSG(INFO, "loading file %s, %d bytes\n", de->d_name,
(int) s.st_size);
fd = open(fname, O_RDONLY);
if (!fd) {
perror("open");
continue;
}
buf = (struct ccnl_buf_s *) ccnl_malloc(sizeof(*buf) + s.st_size);
if (buf)
datalen = read(fd, buf->data, s.st_size);
else
datalen = -1;
close(fd);
if (!buf || datalen != s.st_size || datalen < 2) {
DEBUGMSG(WARNING, "size mismatch for file %s, %d/%d bytes\n",
de->d_name, datalen, (int) s.st_size);
continue;
}
buf->datalen = datalen;
suite = ccnl_pkt2suite(buf->data, datalen, &skip);
pk = NULL;
switch (suite) {
#ifdef USE_SUITE_CCNB
case CCNL_SUITE_CCNB: {
unsigned char *start;
data = start = buf->data + skip;
datalen -= skip;
if (data[0] != 0x04 || data[1] != 0x82)
goto notacontent;
data += 2;
datalen -= 2;
pk = ccnl_ccnb_bytes2pkt(start, &data, &datalen);
break;
}
#endif
#ifdef USE_SUITE_CCNTLV
case CCNL_SUITE_CCNTLV: {
int hdrlen;
unsigned char *start;
data = start = buf->data + skip;
datalen -= skip;
hdrlen = ccnl_ccntlv_getHdrLen(data, datalen);
data += hdrlen;
datalen -= hdrlen;
pk = ccnl_ccntlv_bytes2pkt(start, &data, &datalen);
break;
}
#endif
#ifdef USE_SUITE_CISTLV
case CCNL_SUITE_CISTLV: {
int hdrlen;
unsigned char *start;
data = start = buf->data + skip;
datalen -= skip;
hdrlen = ccnl_cistlv_getHdrLen(data, datalen);
data += hdrlen;
datalen -= hdrlen;
pk = ccnl_cistlv_bytes2pkt(start, &data, &datalen);
break;
}
#endif
#ifdef USE_SUITE_IOTTLV
case CCNL_SUITE_IOTTLV: {
unsigned char *olddata;
data = olddata = buf->data + skip;
datalen -= skip;
if (ccnl_iottlv_dehead(&data, &datalen, &typ, &len) ||
typ != IOT_TLV_Reply)
goto notacontent;
pk = ccnl_iottlv_bytes2pkt(typ, olddata, &data, &datalen);
break;
}
#endif
#ifdef USE_SUITE_NDNTLV
case CCNL_SUITE_NDNTLV: {
unsigned char *olddata;
data = olddata = buf->data + skip;
datalen -= skip;
if (ccnl_ndntlv_dehead(&data, &datalen, (int*) &typ, &len) ||
typ != NDN_TLV_Data)
goto notacontent;
pk = ccnl_ndntlv_bytes2pkt(typ, olddata, &data, &datalen);
break;
}
#endif
default:
DEBUGMSG(WARNING, "unknown packet format (%s)\n", de->d_name);
goto Done;
}
if (!pk) {
DEBUGMSG(DEBUG, " parsing error in %s\n", de->d_name);
goto Done;
}
c = ccnl_content_new(ccnl, &pk);
if (!c) {
DEBUGMSG(WARNING, "could not create content (%s)\n", de->d_name);
goto Done;
}
ccnl_content_add2cache(ccnl, c);
c->flags |= CCNL_CONTENT_FLAGS_STATIC;
Done:
free_packet(pk);
ccnl_free(buf);
continue;
#if defined(USE_SUITE_CCNB) || defined(USE_SUITE_IOTTLV) || defined(USE_SUITE_NDNTLV)
notacontent:
DEBUGMSG(WARNING, "not a content object (%s)\n", de->d_name);
ccnl_free(buf);
#endif
}
closedir(dir);
}
int
ccnl_extractDataAndChunkInfo(unsigned char **data, int *datalen,
int suite, struct ccnl_prefix_s **prefix,
unsigned int *lastchunknum,
unsigned char **content, int *contentlen)
{
struct ccnl_pkt_s *pkt = NULL;
switch (suite) {
#ifdef USE_SUITE_CCNTLV
case CCNL_SUITE_CCNTLV: {
int hdrlen;
unsigned char *start = *data;
if (ccntlv_isData(*data, *datalen) < 0) {
DEBUGMSG(WARNING, "Received non-content-object\n");
return -1;
}
hdrlen = ccnl_ccntlv_getHdrLen(*data, *datalen);
if (hdrlen < 0)
return -1;
*data += hdrlen;
*datalen -= hdrlen;
pkt = ccnl_ccntlv_bytes2pkt(start, data, datalen);
break;
}
#endif
#ifdef USE_SUITE_CISTLV
case CCNL_SUITE_CISTLV: {
int hdrlen;
unsigned char *start = *data;
if (cistlv_isData(*data, *datalen) < 0) {
DEBUGMSG(WARNING, "Received non-content-object\n");
return -1;
}
hdrlen = ccnl_cistlv_getHdrLen(*data, *datalen);
if (hdrlen < 0)
return -1;
*data += hdrlen;
*datalen -= hdrlen;
pkt = ccnl_cistlv_bytes2pkt(start, data, datalen);
break;
}
#endif
#ifdef USE_SUITE_NDNTLV
case CCNL_SUITE_NDNTLV: {
unsigned int typ, len;
unsigned char *start = *data;
if (ccnl_ndntlv_dehead(data, datalen, &typ, &len)) {
DEBUGMSG(WARNING, "could not dehead\n");
return -1;
}
if (typ != NDN_TLV_Data) {
DEBUGMSG(WARNING, "received non-content-object packet with type %d\n", typ);
return -1;
}
pkt = ccnl_ndntlv_bytes2pkt(typ, start, data, datalen);
break;
}
#endif
default:
DEBUGMSG(WARNING, "extractDataAndChunkInfo: suite %d not implemented\n", suite);
return -1;
}
if (!pkt) {
DEBUGMSG(WARNING, "extract(%s): parsing error or no prefix\n",
ccnl_suite2str(suite));
return -1;
}
*prefix = ccnl_prefix_dup(pkt->pfx);
*lastchunknum = pkt->val.final_block_id;
*content = pkt->content;
*contentlen = pkt->contlen;
free_packet(pkt);
return 0;
}
