// write given prefix and chunknum *before* buf[offs], adjust offset
// and return bytes used
int
ccnl_ccntlv_prependName(struct ccnl_prefix_s *name,
int *offset, unsigned char *buf,
unsigned int *lastchunknum) {
int nameend, cnt;
if (lastchunknum) {
if (ccnl_ccntlv_prependNetworkVarUInt(CCNX_TLV_M_ENDChunk,
*lastchunknum, offset, buf) < 0)
return -1;
}
nameend = *offset;
if (name->chunknum &&
ccnl_ccntlv_prependNetworkVarUInt(CCNX_TLV_N_Chunk,
*name->chunknum, offset, buf) < 0)
return -1;
// optional: (not used)
// CCNX_TLV_N_Meta
#ifdef USE_NFN
if (name->nfnflags & CCNL_PREFIX_NFN)
if (ccnl_pkt_prependComponent(name->suite, "NFN", offset, buf) < 0)
return -1;
if (name->nfnflags & CCNL_PREFIX_THUNK)
if (ccnl_pkt_prependComponent(name->suite, "THUNK", offset, buf) < 0)
return -1;
#endif
for (cnt = name->compcnt - 1; cnt >= 0; cnt--) {
if (*offset < name->complen[cnt])
return -1;
*offset -= name->complen[cnt];
memcpy(buf + *offset, name->comp[cnt], name->complen[cnt]);
}
if (ccnl_ccntlv_prependTL(CCNX_TLV_M_Name, nameend - *offset,
offset, buf) < 0)
return -1;
return 0;
}
// write given prefix and chunknum *before* buf[offs], adjust offset.
// Returns 0 on success, non-zero on failure.
int8_t
ccnl_ccntlv_prependName(struct ccnl_prefix_s *name,
size_t *offset, uint8_t *buf,
const uint32_t *lastchunknum) {
size_t cnt;
size_t nameend;
if (lastchunknum) {
if (ccnl_ccntlv_prependNetworkVarUInt(CCNX_TLV_M_ENDChunk,
*lastchunknum, offset, buf)) {
return -1;
}
}
nameend = *offset;
if (name->chunknum &&
ccnl_ccntlv_prependNetworkVarUInt(CCNX_TLV_N_Chunk,
*name->chunknum, offset, buf)) {
return -1;
}
// optional: (not used)
// CCNX_TLV_N_Meta
for (cnt = name->compcnt; cnt > 0; cnt--) {
if (*offset < name->complen[cnt-1]) {
return -1;
}
*offset -= name->complen[cnt-1];
memcpy(buf + *offset, name->comp[cnt-1], name->complen[cnt-1]);
}
if (ccnl_ccntlv_prependTL(CCNX_TLV_M_Name, nameend - *offset,
offset, buf)) {
return -1;
}
return 0;
}