コード例 #1
0
/* replicate packets for multiple-copying */
static void
replicate_packs(char *packet, int length, int replica_num)
{
    int               i;
    uint16_t          orig_port, addition, dest_port, rand_port;
    uint32_t          size_ip;
    tc_tcp_header_t  *tcp_header;
    tc_ip_header_t   *ip_header;
    
    ip_header  = (tc_ip_header_t *) packet;
    size_ip    = ip_header->ihl << 2;
    tcp_header = (tc_tcp_header_t *) ((char *) ip_header + size_ip);
    rand_port  = clt_settings.rand_port_shifted;
    orig_port  = ntohs(tcp_header->source);

    tc_log_debug1(LOG_DEBUG, 0, "orig port:%u", orig_port);

    for (i = 1; i < replica_num; i++) {

        addition   = (((i << 1) - 1) << 5) + rand_port;
        dest_port  = get_appropriate_port(orig_port, addition);
        tcp_header->source = htons(dest_port);
        process_packet(true, packet, length);

        tc_log_debug2(LOG_DEBUG, 0, "new port:%u,add:%u", dest_port, addition);
    }
}
コード例 #2
0
ファイル: tc_packets_module.c プロジェクト: hanjinze/tcpcopy 
static void
replicate_packs(unsigned char *frame, int frame_len, int replica_num)
{
    int              i;
    uint32_t         size_ip;
    uint16_t         orig_port, addition, dest_port, rand_port;
    unsigned char   *packet;
    tc_ip_header_t  *ip_header;
    tc_udp_header_t *udp_header;

    packet     = frame + ETHERNET_HDR_LEN;
    ip_header  = (tc_ip_header_t *) packet;
    size_ip    = ip_header->ihl << 2;
    udp_header = (tc_udp_header_t *) ((char *) ip_header + size_ip);
    orig_port  = ntohs(udp_header->source);

    tc_log_debug1(LOG_DEBUG, 0, "orig port:%u", orig_port);

    rand_port = clt_settings.rand_port_shifted;
    for (i = 1; i < replica_num; i++) {
        addition   = (((i << 1) - 1) << 5) + rand_port;
        dest_port  = get_appropriate_port(orig_port, addition);

        tc_log_debug2(LOG_DEBUG, 0, "new port:%u,add:%u", dest_port, addition);

        udp_header->source = htons(dest_port);
        process_packet(true, frame, frame_len);
    }
}