北邮计算机网络滑动窗口实验报告（附页包含源程序）

seq_nr next_frame_to_send ; upper edge of sender's window+1

seq_nr ack_expected; lower edge of sender's window

seq_nr frame_expected; lower edge of receiver's window

seq_nr too_far; upper edge of receiver's window+1

int arg,length=0;

int i; index into buffer pool

Frame r; scratch variable

frame_expected = 0; the number expected to receive

too_far = NR_BUFS;

nbuffered = 0; initially no packets are buffered

static between(Uchar a,Uchar b,Uchar c)

static void put_frame(unsigned char *frame, int len)

static send_frame_(Uchar fk,Uchar next_frame,Uchar frame_expected,Packet out_buf[])