libtdevnc/test/wsmaketestframe.py

#!/usr/bin/env python3
# Copyright (C)2017 Andreas Weigel.  All Rights Reserved.
#
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# modification, are permitted provided that the following conditions are met:
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import websockets
import base64
import errno

'''
    Create websocket frames for the wstest websocket decoding unit test.

    Generates c ws_frame_test structure definitions
    included by wstest.c.
'''


def add_field(s, name, value, first=False):
    deli = ",\n\t\t"
    if first:
        deli = "\t\t"
    s += "{2}.{0}={1}".format(name, value, deli)
    return s


class Testframe():
    def __init__(self, frame, descr, modify_bytes={}, experrno=0, mask=True):
        self.frame = frame
        self.descr = descr
        self.modify_bytes = modify_bytes
        self.experrno = experrno
        self.b64 = True if frame.opcode == 1 else False
        self.mask = mask

    def to_carray_initializer(self, buf):
        values = []
        for i in range(len(buf)):
            values.append("0X{0:02X}".format(buf[i]))

        if self.modify_bytes != {}:
            for k in self.modify_bytes:
                values[k] = "0X{0:02X}".format(self.modify_bytes[k])

        return "{{{0}}}".format(",".join(values))


    def set_frame_buf(self, buf):
        self.frame_carray = self.to_carray_initializer(buf)
        self.framelen = len(buf)

    def __str__(self):
        print("processing frame: {0}".format(self.descr))
        the_frame = self.frame
        if self.b64:
            olddata = self.frame.data
            newdata = base64.b64encode(self.frame.data)
            #print("converting\n{0}\nto{1}\n".format(olddata, newdata))
            the_frame = websockets.framing.Frame(self.frame.fin, self.frame.opcode, base64.b64encode(olddata))
        websockets.framing.write_frame(the_frame, self.set_frame_buf, self.mask)
        s = "\t{\n"
        s = add_field(s, "frame", "{0}".format(self.frame_carray), True)
        s = add_field(s, "expectedDecodeBuf", self.to_carray_initializer(self.frame.data))
        s = add_field(s, "frame_len", self.framelen)
        s = add_field(s, "raw_payload_len", len(self.frame.data))
        s = add_field(s, "expected_errno", self.experrno)
        s = add_field(s, "descr", "\"{0}\"".format(self.descr))
        s = add_field(s, "i", "0")
        s = add_field(s, "simulate_sock_malfunction_at", "0")
        s = add_field(s, "errno_val", "0")
        s = add_field(s, "close_sock_at", "0")
        s += "\n\t}"
        return s

### create test frames
flist = []
### standard text frames with different lengths
flist.append(Testframe(websockets.framing.Frame(1, 1, bytearray("Testit", encoding="utf-8")), "Short valid text frame"))
flist.append(Testframe(websockets.framing.Frame(1, 1, bytearray("Frame2 does contain much more text and even goes beyond the 126 byte len field. Frame2 does contain much more text and even goes beyond the 126 byte len field.", encoding="utf-8")),
    "Mid-long valid text frame"))
#flist.append(Testframe(websockets.framing.Frame(1, 1, bytearray([(x % 26) + 65 for x in range(100000)])), "100k text frame (ABC..YZABC..)"))

### standard binary frames with different lengths
flist.append(Testframe(websockets.framing.Frame(1, 2, bytearray("Testit", encoding="utf-8")), "Short valid binary frame"))
flist.append(Testframe(websockets.framing.Frame(1, 2, bytearray("Frame2 does contain much more text and even goes beyond the 126 byte len field. Frame2 does contain much more text and even goes beyond the 126 byte len field.", encoding="utf-8")),
    "Mid-long valid binary frame"))
#flist.append(Testframe(websockets.framing.Frame(1, 2, bytearray([(x % 26) + 65 for x in range(100000)])), "100k binary frame (ABC..YZABC..)"))

### some conn reset frames, one with no close message, one with close message
flist.append(Testframe(websockets.framing.Frame(1, 8, bytearray(list([0x03, 0xEB]))), "Close frame (Reason 1003)", experrno=errno.ECONNRESET))
flist.append(Testframe(websockets.framing.Frame(1, 8, bytearray(list([0x03, 0xEB])) + bytearray("I'm a close reason and much more than that!", encoding="utf-8")), "Close frame (Reason 1003) and msg", experrno=errno.ECONNRESET))

### invalid header values
flist.append(Testframe(websockets.framing.Frame(1, 1, bytearray("Testit", encoding="utf-8")), "Invalid frame: Wrong masking", experrno=errno.EPROTO, mask=False))
flist.append(Testframe(websockets.framing.Frame(1, 1, bytearray("..Lore Ipsum", encoding="utf-8")), "Invalid frame: Length of < 126 with add. 16 bit len field", experrno=errno.EPROTO, modify_bytes={ 1: 0xFE, 2: 0x00, 3: 0x0F}))
flist.append(Testframe(websockets.framing.Frame(1, 1, bytearray("........Lore Ipsum", encoding="utf-8")), "Invalid frame: Length of < 126 with add. 64 bit len field", experrno=errno.EPROTO, modify_bytes={ 1: 0xFF, 2: 0x00, 3: 0x00, 4: 0x00, 5: 0x00, 6: 0x80, 7: 0x40}))

s = "struct ws_frame_test tests[] = {\n"
for i in range(len(flist)):
    s += flist[i].__str__()
    if (i + 1 < len(flist)):
        s += ","
    s += "\n"
s += "};\n"

with open("wstestdata.c", "w") as cdatafile:
    cdatafile.write(s)