python读取pcap包
import struct class FileConvert(object): ''' test python file''' def __init__(self): self.aa = 0 self.bb = 0 def convertPcapToHex(self,debugFlg=0): infile = open("test.pcap",'rb') outfile = open("testRslt.txt",'w') a = int(0) while True: a = int(0) a = infile.read(4) #print(type(a)) #print(len(a)) dataSaveNum = len(a) if not a: break if(len(a) == 4): pass elif(len(a) != 0): loopTime = 4 - len(a) while (loopTime > 0): loopTime = loopTime - 1 a = a + b'\x00' z = struct.unpack('i',a) unNeg = z[0] & 0xFFFFFFFF #负数的验证 if(dataSaveNum == 4): outfile.write("%08x"%unNeg) dataSaveNum = 0 while(dataSaveNum > 0): saveData = unNeg&0xFF #保留单个字节 #outfile.write("%08x"%unNeg) unNeg = unNeg >> 8 dataSaveNum = dataSaveNum - 1 outfile.write("%02x"%saveData) if(debugFlg == 1): outfile.write("\n") infile.close() outfile.close() def convertHexToPcap(self): infile = open("testRslt.txt",'r') outfile = open("another.pcap",'wb') #for a in infile.read(): while True: a = infile.read(8) #print(type(a)) #print(b); if not a: break if(len(a)!= 0): #16进制转换10进制数 b=int(a,16) covertValue = struct.pack("L",b) outfile.write(covertValue) #outfile.write("%s"%a) #outfile.write("\n") infile.close() outfile.close() if __name__ == '__main__': fileCvrt = FileConvert() fileCvrt.convertPcapToHex() fileCvrt.convertHexToPcap()