int ccnl_core_RX_datagram(struct ccnl_relay_s *relay, struct ccnl_face_s *from,
unsigned char **data, int *datalen)
{
int rc = 0, num = 0, typ = 0;
DEBUGMSG(1, "ccnl_core_RX_datagram: %d bytes from face=%p (id=%d.%d)\n",
*datalen, (void *) from, relay->id, from ? from->faceid : -1);
while (rc >= 0 && *datalen > 0) {
if (dehead(data, datalen, &num, &typ) || typ != CCN_TT_DTAG) {
return -1;
}
switch (num) {
case CCN_DTAG_INTEREST:
/* no break */
case CCN_DTAG_CONTENTOBJ:
rc = ccnl_core_RX_i_or_c(relay, from, data, datalen);
continue;
#ifdef USE_FRAG
case CCNL_DTAG_FRAGMENT2012:
rc = ccnl_frag_RX_frag2012(ccnl_core_RX_datagram, relay, from, data, datalen);
continue;
case CCNL_DTAG_FRAGMENT:
rc = ccnl_frag_RX_CCNx2013(ccnl_core_RX_datagram, relay, from, data, datalen);
continue;
#endif
default:
DEBUGMSG(15, " unknown datagram type %d\n", num);
return -1;
}
}
return rc;
}
int ccnl_frag_RX_CCNx2013(RX_datagram callback, struct ccnl_relay_s *relay,
struct ccnl_face_s *from, unsigned char **data, int *datalen)
{
int rc, num, typ, pdutypelen;
unsigned char *pdutype = 0;
struct serialFragPDU_s s;
DEBUGMSG(99, "ccnl_frag_RX_CCNx2013 (%d bytes)\n", *datalen);
serialFragPDU_init(&s);
while (dehead(data, datalen, &num, &typ) == 0) {
if (num == 0 && typ == 0) {
break; /* end */
}
if (typ == CCN_TT_DTAG) {
switch (num) {
case CCNL_DTAG_FRAG_TYPE:
if (hunt_for_end(data, datalen, &pdutype, &pdutypelen)
|| pdutypelen != 3) {
goto Bail;
}
continue;
case CCNL_DTAG_FRAG_SEQNR:
getNumField(s.ourseq, s.ourseqwidth, HAS_OSEQ, "ourseq")
;
continue;
case CCNL_DTAG_FRAG_FLAGS:
getNumField(s.flags, s.flagwidth, HAS_FLAGS, "flags")
;
continue;
case CCN_DTAG_CONTENT:
// if (frag) /* error: more than one content entry */
if (consume(typ, num, data, datalen, &s.content, &s.contlen)
< 0) {
goto Bail;
}
continue;
/* CCNL extensions: */
case CCN_DTAG_INTEREST:
case CCN_DTAG_CONTENTOBJ:
rc = ccnl_core_RX_i_or_c(relay, from, data, datalen);
if (rc < 0) {
return rc;
}
continue;
case CCNL_DTAG_FRAG_OLOSS:
getNumField(s.ourloss, s.ourlosswidth, HAS_OLOS, "ourloss")
;
continue;
case CCNL_DTAG_FRAG_YSEQN:
getNumField(s.yourseq, s.yourseqwidth, HAS_YSEQ, "yourseq")
;
continue;
default:
break;
}
}
if (consume(typ, num, data, datalen, 0, 0) < 0) {
goto Bail;
}
}
if (!pdutype || !s.content) {
/* ||
(s.HAS&(HAS_FLAGS|HAS_OSEQ)) != (HAS_FLAGS|HAS_OSEQ) ) {
*/
DEBUGMSG(1, "* incomplete frag\n");
return 0;
}
DEBUGMSG(1, "hop-by-hop\n");
if (memcmp(pdutype, CCNL_FRAG_TYPE_CCNx2013_VAL, 3) == 0) { /* hop-by-hop */
if (from) {
if (!from->frag)
from->frag = ccnl_frag_new(CCNL_FRAG_CCNx2013,
relay->ifs[from->ifndx].mtu);
if (from->frag && from->frag->protocol == CCNL_FRAG_CCNx2013) {
ccnl_frag_RX_serialfragment(callback, relay, from, &s);
}
else {
DEBUGMSG(1, "WRONG FRAG PROTOCOL\n");
}
}
else {
ccnl_frag_RX_serialfragment(callback, relay, from, &s);
}
}
/*
* echo "FMTE" | base64 -d | hexdump -v -e '/1 "@x%02x"'| tr @ '\\'; echo
*/
if (memcmp(pdutype, "\x14\xc4\xc4", 3) == 0) { /* mid-to-end fragment */
/* not implemented yet */
}
DEBUGMSG(1, "mid-to-end fragment\n");
return 0;
Bail:
DEBUGMSG(1, "* frag bailing\n");
return -1;
}
