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Discard confirmed APDU from original broadcast in BIP and BIP6 datalink (#149)

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Co-authored-by: Steve Karg <skarg@users.sourceforge.net>
This commit is contained in:
Steve Karg
2021-01-13 13:59:16 -06:00
committed by GitHub
parent 0a9fbaf438
commit 69f876f1c9
5 changed files with 106 additions and 17 deletions
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src/bacnet/basic/bbmd6/h_bbmd6.c
+37 -12
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@@ -615,6 +615,7 @@ int bvlc6_bbmd_disabled_handler(BACNET_IP6_ADDRESS *addr,
int function_len = 0;
uint8_t *pdu = NULL;
uint16_t pdu_len = 0;
uint8_t *npdu = NULL;
uint16_t npdu_len = 0;
bool send_result = false;
uint16_t offset = 0;
@@ -696,6 +697,18 @@ int bvlc6_bbmd_disabled_handler(BACNET_IP6_ADDRESS *addr,
bbmd6_add_vmac(vmac_src, addr);
bvlc6_vmac_address_set(src, vmac_src);
offset = header_len + (function_len - npdu_len);
/* BTL test: verifies that the IUT will quietly
discard any Confirmed-Request-PDU, whose
destination address is a multicast or
broadcast address, received from the
network layer. */
npdu = &mtu[offset];
if (npdu_confirmed_service(npdu, npdu_len)) {
offset = 0;
debug_printf(
"BIP6: Original-Broadcast-NPDU: "
"Confirmed Service! Discard!");
}
} else {
debug_printf("BIP6: Original-Broadcast-NPDU: Unable to "
"decode!\n");
@@ -853,18 +866,30 @@ int bvlc6_bbmd_enabled_handler(BACNET_IP6_ADDRESS *addr,
if (function_len) {
offset = header_len + (function_len - npdu_len);
npdu = &mtu[offset];
/* Upon receipt of a BVLL Original-Broadcast-NPDU
message from the local multicast domain, a BBMD
shall construct a BVLL Forwarded-NPDU message and
unicast it to each entry in its BDT. In addition,
the constructed BVLL Forwarded-NPDU message shall
be unicast to each foreign device currently in
the BBMD's FDT */
BVLC6_Buffer_Len = bvlc6_encode_forwarded_npdu(
&BVLC6_Buffer[0], sizeof(BVLC6_Buffer), vmac_src, addr,
npdu, npdu_len);
bbmd6_send_pdu_bdt(&BVLC6_Buffer[0], BVLC6_Buffer_Len);
bbmd6_send_pdu_fdt(&BVLC6_Buffer[0], BVLC6_Buffer_Len);
/* BTL test: verifies that the IUT will quietly
discard any Confirmed-Request-PDU, whose
destination address is a multicast or
broadcast address, received from the
network layer. */
if (npdu_confirmed_service(npdu, npdu_len)) {
offset = 0;
debug_printf(
"BIP6: Original-Broadcast-NPDU: "
"Confirmed Service! Discard!");
} else {
/* Upon receipt of a BVLL Original-Broadcast-NPDU
message from the local multicast domain, a BBMD
shall construct a BVLL Forwarded-NPDU message and
unicast it to each entry in its BDT. In addition,
the constructed BVLL Forwarded-NPDU message shall
be unicast to each foreign device currently in
the BBMD's FDT */
BVLC6_Buffer_Len = bvlc6_encode_forwarded_npdu(
&BVLC6_Buffer[0], sizeof(BVLC6_Buffer), vmac_src,
addr, npdu, npdu_len);
bbmd6_send_pdu_bdt(&BVLC6_Buffer[0], BVLC6_Buffer_Len);
bbmd6_send_pdu_fdt(&BVLC6_Buffer[0], BVLC6_Buffer_Len);
}
if (!bbmd6_address_match_self(addr)) {
/* The Virtual MAC address table shall be updated
using the respective parameter values of the