From bc1e3ba5680739a34304f324bf726a4c97d6bc72 Mon Sep 17 00:00:00 2001 From: Isak Westin Date: Wed, 21 Sep 2022 13:16:28 +0200 Subject: [PATCH] mesh: Add interface output filter According to the mesh profile (3.4.5.2), if TTL is set to 1 for an outgoing message, that message shall be dropped. Signed-off-by: Manika Shrivastava Signed-off-by: Ayush Garg --- mesh/net.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/mesh/net.c b/mesh/net.c index 925155c..ad9ff15 100644 --- a/mesh/net.c +++ b/mesh/net.c @@ -3065,6 +3065,13 @@ void mesh_net_send_seg(struct mesh_net *net, uint32_t net_key_id, uint8_t segO = (hdr >> SEGO_HDR_SHIFT) & SEG_MASK; uint8_t segN = (hdr >> SEGN_HDR_SHIFT) & SEG_MASK; + /* + * MshPRFv1.0.1 section 3.4.5.2, Interface output filter: + * If TTL is set to 1, message shall be dropped. + */ + if (ttl == 1) + return; + /* TODO: Only used for current POLLed segments to LPNs */ l_debug("SEQ: %6.6x", seq + segO); @@ -3133,6 +3140,13 @@ bool mesh_net_app_send(struct mesh_net *net, bool frnd_cred, uint16_t src, (dst >= net->src_addr && dst <= net->last_addr)) return true; + /* + * MshPRFv1.0.1 section 3.4.5.2, Interface output filter: + * If TTL is set to 1, message shall be dropped. + */ + if (ttl == 1) + return true; + /* Setup OTA Network send */ payload = mesh_sar_new(msg_len); memcpy(payload->buf, msg, msg_len); @@ -3204,6 +3218,13 @@ void mesh_net_ack_send(struct mesh_net *net, uint32_t net_key_id, uint8_t pkt_len; uint8_t pkt[30]; + /* + * MshPRFv1.0.1 section 3.4.5.2, Interface output filter: + * If TTL is set to 1, message shall be dropped. + */ + if (ttl == 1) + return; + hdr = NET_OP_SEG_ACKNOWLEDGE << OPCODE_HDR_SHIFT; hdr |= rly << RELAY_HDR_SHIFT; hdr |= (seqZero & SEQ_ZERO_MASK) << SEQ_ZERO_HDR_SHIFT; @@ -3262,6 +3283,13 @@ void mesh_net_transport_send(struct mesh_net *net, uint32_t net_key_id, if (*msg & 0xc0 || (9 + msg_len + 8 > 29)) return; + /* + * MshPRFv1.0.1 section 3.4.5.2, Interface output filter: + * If TTL is set to 1, message shall be dropped. + */ + if (ttl == 1) + return; + /* Enqueue for Friend if forwardable and from us */ if (!net_key_id && src >= net->src_addr && src <= net->last_addr) { uint32_t hdr = msg[0] << OPCODE_HDR_SHIFT; -- 2.7.4