udp数据包分包函数

原创于 2025-09-09 20:27:55 发布 · 82 阅读

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#udp #网络协议 #网络

static auto BinaryDataSplit = [](char* buff, size_t buffsize, const int PARTSIZE, char* header = nullptr, size_t headersize=0)
    {
        std::vector<std::vector<char>> data;
        int part = (buffsize + PARTSIZE - 1) / PARTSIZE;
        for (int i = 0; i < part; i++)
        {
            std::vector<char> partdata;
            int length = (buffsize < (i + 1) * PARTSIZE) ? buffsize - i * PARTSIZE : PARTSIZE;
            char* bf = buff + (i * PARTSIZE);
            partdata.resize(length + headersize);
            if (header && headersize > 0)
            {
                std::copy(header, header + headersize, partdata.begin());
            }
            else headersize = 0;
            std::copy(bf, bf + length, partdata.begin() + headersize);
            data.push_back(std::move(partdata));
        }
        return data;
    };

int main()
{
    char data[] = "hello world";
    char header[] = "head";
    //将data数据分成3字节一个包,并且附带header头信息
    auto udpDataParted = BInaryDataSplit(data, strnlen(data), 3, header, strlen(header));
    return 0;
}