libpcap中的数据包向量 [英] vector of packets in libpcap

问题描述

我正在c/c ++中使用libpcap，在向量中插入指针时遇到问题. 这是我的代码:

I'm working with libpcap in c / c + + and I have a problem when inserting pointers in a vector. This is my code:

    typedef vector <u_char *>vPack;
    ...
    vPack vect;
    ...
    if (pcap_dispatch (p, 0, &mycallback, (u_char *) &vect) < 0){
         cout << "Error" << endl;
          pcap_perror (p, prestr);
    }
    ....
    void mycallback (u_char * args, const struct pcap_pkthdr *pkthdr, const u_char * packet){
          u_char *pk;
          pk = (u_char *)packet;
          vPack *vec = (vPack *) args;
          vec[0].push_back(pk);
        }

问题在于元素插入到相同的存储位置，并且向量始终包含相同的元素. 有什么建议吗?

The problem is that the elements are inserted in the same memory location, and the vector always contains the same element. Any suggestions?

PD:对不起，我的英语.

PD: sorry for my english.

推荐答案

扩展了Karrek的尝试！

extending Karrek's attempt!

struct packet_handler
{
  typedef std::vector<u_char> PacketType;
  typedef std::vector <PacketType> PacketBuffer;

  static void handler(u_char *user, const pcap_pkthdr *h, const u_char *bytes)
  {
    packet_handler* ph = reinterpret_cast<packet_handler*>(user);
    ph->handle(PacketType(bytes, bytes + h->caplen));
  }

  void handle(PacketType const& packet)
  {
    _packetBuffer.push_back(packet);
  }

  PacketBuffer _packetBuffer;
};

int main()
{
  packet_handler ph;
  // pass in the handler class as user data
  int result = pcap_dispatch(p, 0, packet_handler::handler, reinterpret_cast<uchar*>(&ph));
}

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