From 1dab8d0c424af912c01eea9337e82250c5ef648f Mon Sep 17 00:00:00 2001
From: Guo Wenxue <guowenxue@gmail.com>
Date: Thu, 11 Apr 2024 13:09:46 +0800
Subject: [PATCH] Update .gitignore file
---
project/socketd/booster/packet.c | 134 +++++++++++++++++++++++++++++++++++++++++---
1 files changed, 124 insertions(+), 10 deletions(-)
diff --git a/project/socketd/booster/packet.c b/project/socketd/booster/packet.c
index 6aa76a4..3db4f97 100644
--- a/project/socketd/booster/packet.c
+++ b/project/socketd/booster/packet.c
@@ -46,12 +46,13 @@
return 0;
}
-int packet_segmented_pack(pack_info_t *pack_info, char *pack_buf, int size)
+int packet_segmented_pack(pack_info_t *pack_info, uint8_t *pack_buf, int size)
{
char strtime[TIME_LEN] = {'\0'};
struct tm *ptm;
+ char *buf = (char *)pack_buf;
- if( !pack_info || !pack_buf || size<=0 )
+ if( !pack_info || !buf || size<=0 )
{
log_error("Invalid input arguments\n");
return -1;
@@ -62,18 +63,19 @@
ptm->tm_year+1900, ptm->tm_mon+1, ptm->tm_mday,
ptm->tm_hour, ptm->tm_min, ptm->tm_sec);
- memset(pack_buf, 0, size);
- snprintf(pack_buf, size, "%s|%s|%.3f", pack_info->devid, strtime, pack_info->temper);
+ memset(buf, 0, size);
+ snprintf(buf, size, "%s|%s|%.3f", pack_info->devid, strtime, pack_info->temper);
- return strlen(pack_buf);
+ return strlen(buf);
}
-int packet_json_pack(pack_info_t *pack_info, char *pack_buf, int size)
+int packet_json_pack(pack_info_t *pack_info, uint8_t *pack_buf, int size)
{
char strtime[TIME_LEN] = {'\0'};
struct tm *ptm;
+ char *buf = (char *)pack_buf;
- if( !pack_info || !pack_buf || size<=0 )
+ if( !pack_info || !buf || size<=0 )
{
log_error("Invalid input arguments\n");
return -1;
@@ -84,10 +86,122 @@
ptm->tm_year+1900, ptm->tm_mon+1, ptm->tm_mday,
ptm->tm_hour, ptm->tm_min, ptm->tm_sec);
- memset(pack_buf, 0, size);
- snprintf(pack_buf, size, "{\"devid\":\"%s\", \"time\":\"%s\",\"temperature\":\"%.3f\"}",
+ memset(buf, 0, size);
+ snprintf(buf, size, "{\"devid\":\"%s\", \"time\":\"%s\",\"temperature\":\"%.3f\"}",
pack_info->devid, strtime, pack_info->temper);
- return strlen(pack_buf);
+ return strlen(buf);
+}
+
+/*
+ * The CRC-ITU-T, also known as CRC-16-ITU-T or CRC-16-V.41, uses the polynomial:
+ * 0x1021: x^16 + x^12 + x^5 + 1
+ */
+
+#define CRC16_ITU_T_POLY 0x1021 /* Define the CRC-ITU-T polynomial */
+static uint16_t crc_itu_t(const uint8_t *data, size_t length)
+{
+ uint16_t crc = 0xFFFF;
+ size_t i, j;
+
+ for (i=0; i<length; i++)
+ {
+ crc ^= ((uint16_t)data[i] << 8);
+
+ for(j=0; j<8; j++)
+ {
+ if (crc & 0x8000)
+ {
+ crc = (crc << 1) ^ CRC16_ITU_T_POLY;
+ }
+ else
+ {
+ crc <<= 1;
+ }
+ }
+ }
+
+ return crc;
+}
+
+uint16_t to_big_endian(uint16_t num)
+{
+ return (num << 8) | (num >> 8);
+}
+
+/* TLV(Tag Length Value) PDU(Protocal Data Unit) format:
+ *
+ * +-----------+-----------+------------+-------------+-------------+
+ * | Header(2B)| Tag(1B) | Length(2B) | Value(nB) | CRC16(2B) |
+ * +-----------+-----------+------------+-------------+-------------+
+ *
+ * Header(2B): 0xFE 0xFD
+ * Tag(1B): 0x01->temperature 0x02->Humidity 0x03->Noisy ...
+ * Length(2B): Data value length
+ * Value(nB): Data value
+ * CRC16(2B): CRC from Header to Value
+ */
+
+int packet_tlv_pack(pack_info_t *pack_info, uint8_t *pack_buf, int size)
+{
+ struct tm *ptm;
+ int ofset = 0;
+ uint16_t crc;
+
+ if( !pack_info || !pack_buf || size<TLV_MINSIZE )
+
+ {
+ log_error("Invalid input arguments\n");
+ return -1;
+ }
+
+ /*+----------------------+
+ *| TLV Header(2B) |
+ *+----------------------+*/
+ *(uint16_t *)pack_buf = to_big_endian(TLV_HEADER);
+ ofset += 2;
+
+ /*+----------------------+
+ *| TLV Tag(1B) |
+ *+----------------------+*/
+ pack_buf[ofset++] = TAG_TEMPERATURE;
+
+ /* Skip data length here, we will calculate it later */
+ ofset += 2;
+
+ /*+----------------------+
+ *| payload data value |
+ *+----------------------+*/
+
+ /* 6 bytes sample time */
+ ptm = &pack_info->sample_time;
+ pack_buf[ofset++] = (uint8_t)(ptm->tm_year+1900-2000);
+ pack_buf[ofset++] = (uint8_t)(ptm->tm_mon+1);
+ pack_buf[ofset++] = (uint8_t)(ptm->tm_mday);
+ pack_buf[ofset++] = (uint8_t)(ptm->tm_hour);
+ pack_buf[ofset++] = (uint8_t)(ptm->tm_min);
+ pack_buf[ofset++] = (uint8_t)(ptm->tm_sec);
+
+ /* 8 bytes device SN */
+ strncpy((char *)(pack_buf+ofset), pack_info->devid, DEVID_LEN);
+ ofset += DEVID_LEN;
+
+ /* 2 bytes temperature value */
+ pack_buf[ofset++] = (int)pack_info->temper; /* integer part */
+ pack_buf[ofset++] = (((int)(pack_info->temper*100))%100); /* fractional part */
+
+ /*+----------------------+
+ *| TLV Length(2B) |
+ *+----------------------+*/
+ *(uint16_t *)(pack_buf+3) = (ofset-5);
+
+ /*+----------------------+
+ *| TLV CRC(2B) |
+ *+----------------------+*/
+ crc = crc_itu_t(pack_buf, ofset);
+ *(uint16_t *)(pack_buf+ofset) = crc;
+ ofset += 2;
+
+ return ofset;
}
--
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