77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
#include "Communicate.h"
|
|
|
|
constexpr unsigned char gHeader[] = {0xFF, 0xFE};
|
|
constexpr unsigned char gTail[] = {0xFF, 0xFF};
|
|
|
|
Communicate::Communicate()
|
|
{
|
|
}
|
|
|
|
/*
|
|
【 transm TCP 数据协议 】
|
|
header 2 char: 0xFF 0xFE
|
|
from 32 char:
|
|
to 32 char:
|
|
len 4 char:
|
|
data xxxxx:
|
|
tail 2 char: 0xFF 0xFF
|
|
*/
|
|
FrameBuffer* Communicate::ParseBuffer(MutBuffer& buffer)
|
|
{
|
|
FrameBuffer* frame = nullptr;
|
|
|
|
int find = buffer.IndexOf((const char*)gHeader, sizeof(gHeader));
|
|
if (find < 0) {
|
|
return frame;
|
|
}
|
|
|
|
int len = 0;
|
|
std::memcpy(&len, buffer.GetData() + find + sizeof(gHeader) + 64, sizeof(len));
|
|
if (buffer.Length() < (find + sizeof(gHeader) + 64 + len + sizeof(len) + sizeof(gTail)) || len < 0) {
|
|
return frame;
|
|
}
|
|
|
|
if (std::memcmp(buffer.GetData() + find + sizeof(gHeader) + 64 + sizeof(len) + len, gTail, sizeof(gTail)) != 0) {
|
|
return frame;
|
|
}
|
|
|
|
frame = new FrameBuffer();
|
|
frame->fid = std::string(buffer.GetData() + find + sizeof(gHeader), 32);
|
|
frame->tid = std::string(buffer.GetData() + find + sizeof(gHeader) + 32, 32);
|
|
|
|
if (len > 0) {
|
|
frame->data = new char[len];
|
|
std::memcpy(frame->data, buffer.GetData() + find + sizeof(gHeader) + 64 + sizeof(len), len);
|
|
frame->len = len;
|
|
}
|
|
buffer.RemoveOf(0, find + sizeof(gHeader) + 64 + len + sizeof(len) + sizeof(gTail));
|
|
return frame;
|
|
}
|
|
|
|
bool Communicate::PackBuffer(FrameBuffer* frame, char** buf, int& len)
|
|
{
|
|
if (frame == nullptr) {
|
|
return false;
|
|
}
|
|
if (frame->data == nullptr) {
|
|
frame->len = 0;
|
|
}
|
|
len = sizeof(gHeader) + 64 + sizeof(len) + frame->len + sizeof(gTail);
|
|
*buf = new char[len];
|
|
std::memcpy(*buf, gHeader, sizeof(gHeader));
|
|
std::memcpy(*buf + sizeof(gHeader), frame->fid.c_str(), 32);
|
|
std::memcpy(*buf + sizeof(gHeader) + 32, frame->tid.c_str(), 32);
|
|
std::memcpy(*buf + sizeof(gHeader) + 64, &frame->len, sizeof(len));
|
|
if (frame->len > 0) {
|
|
std::memcpy(*buf + sizeof(gHeader) + 64 + sizeof(len), frame->data, frame->len);
|
|
}
|
|
std::memcpy(*buf + sizeof(gHeader) + 64 + sizeof(len) + frame->len, gTail, sizeof(gTail));
|
|
return true;
|
|
}
|
|
|
|
FrameBuffer::~FrameBuffer()
|
|
{
|
|
delete[] data;
|
|
len = 0;
|
|
}
|