diff options
Diffstat (limited to 'recipes-connectivity/lora/lora-packet-forwarder/lora-packet-forwarder-dedup-rx.patch')
-rw-r--r-- | recipes-connectivity/lora/lora-packet-forwarder/lora-packet-forwarder-dedup-rx.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/recipes-connectivity/lora/lora-packet-forwarder/lora-packet-forwarder-dedup-rx.patch b/recipes-connectivity/lora/lora-packet-forwarder/lora-packet-forwarder-dedup-rx.patch new file mode 100644 index 0000000..c368033 --- /dev/null +++ b/recipes-connectivity/lora/lora-packet-forwarder/lora-packet-forwarder-dedup-rx.patch @@ -0,0 +1,66 @@ +diff --git a/lora_pkt_fwd/src/lora_pkt_fwd.c b/lora_pkt_fwd/src/lora_pkt_fwd.c +index 801f28d..c35c64f 100644 +--- a/lora_pkt_fwd/src/lora_pkt_fwd.c ++++ b/lora_pkt_fwd/src/lora_pkt_fwd.c +@@ -126,8 +126,9 @@ volatile bool quit_sig = false; /* 1 -> application terminates without shutting + static bool fwd_valid_pkt = true; /* packets with PAYLOAD CRC OK are forwarded */ + static bool fwd_error_pkt = false; /* packets with PAYLOAD CRC ERROR are NOT forwarded */ + static bool fwd_nocrc_pkt = false; /* packets with NO PAYLOAD CRC are NOT forwarded */ ++static bool fwd_best_pkt = true; /* duplicate packets with low SNR are NOT forwarded */ + + /* network configuration variables */ + static uint64_t lgwm = 0; /* Lora gateway MAC address */ + static char serv_addr[64] = STR(DEFAULT_SERVER); /* address of the server (host name or IPv4/IPv6) */ + static char serv_port_up[8] = STR(DEFAULT_PORT_UP); /* server port for upstream traffic */ +@@ -731,6 +742,12 @@ static int parse_gateway_configuration(const char * conf_file) { + } + + /* packet filtering parameters */ ++ val = json_object_get_value(conf_obj, "best_packet_filter"); ++ if (json_value_get_type(val) == JSONBoolean) { ++ fwd_best_pkt = (bool)json_value_get_boolean(val); ++ } ++ MSG("INFO: duplicate packets received with low SNR will%s be forwarded\n", (!fwd_best_pkt ? "" : " NOT")); ++ + val = json_object_get_value(conf_obj, "forward_crc_valid"); + if (json_value_get_type(val) == JSONBoolean) { + fwd_valid_pkt = (bool)json_value_get_boolean(val); +@@ -1536,6 +1562,38 @@ void thread_up(void) { + memcpy((void *)(buff_up + buff_index), (void *)"{\"rxpk\":[", 9); + buff_index += 9; + ++ if (fwd_best_pkt && nb_pkt > 1) { ++ uint32_t check_addr = 0; ++ uint32_t check_mic = 0; ++ uint16_t check_fcnt = 0; ++ float check_snr = -30.0; ++ ++ for (i=0; i < nb_pkt; ++i) { ++ p = &rxpkt[i]; ++ if (p->size < 12) ++ continue; ++ ++ memcpy(&check_addr, p->payload + 1, 4); ++ memcpy(&check_fcnt, p->payload + 6, 2); ++ memcpy(&check_mic, p->payload + p->size - 4, 4); ++ ++ check_snr = p->snr; ++ ++ for (j=0; j < nb_pkt; ++j) { ++ p = &rxpkt[j]; ++ ++ if (p->size >= 12 ++ && memcmp(&check_addr, p->payload + 1, 4) == 0 ++ && memcmp(&check_fcnt, p->payload + 6, 2) == 0 ++ && memcmp(&check_mic, p->payload + p->size - 4, 4) == 0 ++ && p->snr < check_snr) { ++ // set status of duplicate packets rx'd on wrong channel ++ p->status = 1; ++ } ++ } ++ } ++ } ++ + /* serialize Lora packets metadata and payload */ + pkt_in_dgram = 0; + for (i=0; i < nb_pkt; ++i) { |