void
ccnl_core_RX(struct ccnl_relay_s *relay, int ifndx, unsigned char *data,
int datalen, struct sockaddr *sa, int addrlen)
{
unsigned char *base = data;
struct ccnl_face_s *from;
int enc, suite = -1, skip;
dispatchFct dispatch;
(void) base; // silence compiler warning (if USE_DEBUG is not set)
DEBUGMSG_CORE(DEBUG, "ccnl_core_RX ifndx=%d, %d bytes\n", ifndx, datalen);
// DEBUGMSG_ON(DEBUG, "ccnl_core_RX ifndx=%d, %d bytes\n", ifndx, datalen);
#ifdef USE_STATS
if (ifndx >= 0)
relay->ifs[ifndx].rx_cnt++;
#endif
from = ccnl_get_face_or_create(relay, ifndx, sa, addrlen);
if (!from) {
DEBUGMSG_CORE(DEBUG, " no face\n");
return;
} else {
DEBUGMSG_CORE(DEBUG, " face %d, peer=%s\n", from->faceid,
ccnl_addr2ascii(&from->peer));
}
// loop through all packets in the received frame (UDP, Ethernet etc)
while (datalen > 0) {
// work through explicit code switching
while (!ccnl_switch_dehead(&data, &datalen, &enc))
suite = ccnl_enc2suite(enc);
if (suite == -1)
suite = ccnl_pkt2suite(data, datalen, &skip);
if (!ccnl_isSuite(suite)) {
DEBUGMSG_CORE(WARNING, "?unknown packet format? ccnl_core_RX ifndx=%d, %d bytes starting with 0x%02x at offset %zd\n",
ifndx, datalen, *data, data - base);
return;
}
// dispatch = ccnl_core_RX_dispatch[suite];
dispatch = ccnl_core_suites[suite].RX;
if (!dispatch) {
DEBUGMSG_CORE(ERROR, "Forwarder not initialized or dispatcher "
"for suite %s does not exist.\n", ccnl_suite2str(suite));
return;
}
if (dispatch(relay, from, &data, &datalen) < 0)
break;
if (datalen > 0) {
DEBUGMSG_CORE(WARNING, "ccnl_core_RX: %d bytes left\n", datalen);
}
}
}
// return 1 for Reply, 0 for Request, -1 if invalid
int iottlv_isReply(unsigned char *buf, int len)
{
int enc = 1, suite;
unsigned int typ;
int vallen;
while (!ccnl_switch_dehead(&buf, &len, &enc));
suite = ccnl_enc2suite(enc);
if (suite != CCNL_SUITE_IOTTLV)
return -1;
DEBUGMSG(DEBUG, "suite ok\n");
if (len < 1 || ccnl_iottlv_dehead(&buf, &len, &typ, &vallen) < 0)
return -1;
DEBUGMSG(DEBUG, "typ=%d, len=%d\n", typ, vallen);
if (typ == IOT_TLV_Reply)
return 1;
if (typ == IOT_TLV_Request)
return 0;
return -1;
}
