C/C++ 协议解析通用流转包方法不怕连包
2021/10/20 11:10:26
本文主要是介绍C/C++ 协议解析通用流转包方法不怕连包,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
一、流程图
二、详细代码
//begin解析数据包 static uint8_t parse_packet_buf[20480]; static int16_t parse_packet_buf_index = 0; static uint8_t resolver_num_packets = 0; static void add_parse_packet_buf(uint8_t* data, uint16_t len) { if(len<(20480-parse_packet_buf_index)) { memcpy(&parse_packet_buf[parse_packet_buf_index], data, len); parse_packet_buf_index+=len; } } static void delete_parse_packet_buf(uint16_t len) { memcpy(parse_packet_buf, &parse_packet_buf[len], parse_packet_buf_index-len); parse_packet_buf_index-=len; } static uint16_t resolver_delete(uint8_t* buff) { int16_t byte_count = 0; int16_t data_len = 0; uint8_t check_sum = 0; uint8_t recv_checksum = 0; if(parse_packet_buf_index<=5) { return byte_count; } if ((buff[0] == 0xAA) && (buff[1] == 0x55)) { data_len = (buff[3] << 8) + buff[4]; if ((data_len != 0) && (data_len < 1024)) { recv_checksum = get_checksum(&buff[5], data_len); check_sum = buff[2]; byte_count = data_len + 5; if (recv_checksum == check_sum) { resolver_num_packets++; printf("check succes\r\n"); } else { //CheckSum错误 //滑动丢弃无用字节 byte_count = 1; printf("check err\r\n"); } } else { //滑动丢弃无用字节 byte_count = 1; } } return byte_count; } static uint8_t parse_packet(uint8_t* data, uint16_t len) { uint16_t delete_len = 0; resolver_num_packets = 0; add_parse_packet_buf(data,len); while(1) { delete_len = resolver_delete(parse_packet_buf); if(delete_len == 0) { break; } else { delete_parse_packet_buf(delete_len); } } return resolver_num_packets; } //end解析数据包
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