在閱讀一些CTF寫起坐我碰到這個腳本來USB映射與蟒蛇
#!/usr/bin/env python
import struct
import Image
import dpkt
INIT_X, INIT_Y = 100, 400
def print_map(pcap, device):
picture = Image.new("RGB", (1200, 500), "white")
pixels = picture.load()
x, y = INIT_X, INIT_Y
for ts, buf in pcap:
device_id, = struct.unpack("b", buf[0x0B])
if device_id != device:
continue
data = struct.unpack("bbbb", buf[-4:])
status = data[0]
x = x + data[1]
y = y + data[2]
if (status == 1):
for i in range(-5, 5):
for j in range(-5, 5):
pixels[x + i , y + j] = (0, 0, 0, 0)
else:
pixels[x, y] = (255, 0, 0, 0)
picture.save("riverside-map.png", "PNG")
if __name__ == "__main__":
f = open("usb.pcap", "rb")
pcap = dpkt.pcap.Reader(f)
print_map(pcap, 5)
f.close()
當我在我的usb.pcap運行它,我得到這個錯誤:
Traceback (most recent call last):
File "test.py", line 39, in <module>
print_map(pcap, n)
File "test.py", line 31, in print_map
pixels[x, y] = (255, 0, 0, 0)
IndexError: image index out of range
爲什麼正在發生?
作爲調試的第一步,嘗試打印出x和y。這個問題不適合這個網站,所以我已經投票結束了。 – paj28