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dom/bluetooth/ObexBase.cpp@b8a032363ba2 (annotated)

dom/bluetooth/ObexBase.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1	/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
michael@0	2	/* vim: set ts=2 et sw=2 tw=80: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0	5	* You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#include "ObexBase.h"
michael@0	8
michael@0	9	BEGIN_BLUETOOTH_NAMESPACE
michael@0	10
michael@0	11	int
michael@0	12	AppendHeaderName(uint8_t* aRetBuf, int aBufferSize, const char* aName,
michael@0	13	int aLength)
michael@0	14	{
michael@0	15	int headerLength = aLength + 3;
michael@0	16
michael@0	17	aRetBuf[0] = ObexHeaderId::Name;
michael@0	18	aRetBuf[1] = (headerLength & 0xFF00) >> 8;
michael@0	19	aRetBuf[2] = headerLength & 0x00FF;
michael@0	20
michael@0	21	memcpy(&aRetBuf[3], aName, (aLength < aBufferSize - 3)? aLength
michael@0	22	: aBufferSize - 3);
michael@0	23
michael@0	24	return headerLength;
michael@0	25	}
michael@0	26
michael@0	27	int
michael@0	28	AppendHeaderBody(uint8_t* aRetBuf, int aBufferSize, const uint8_t* aData,
michael@0	29	int aLength)
michael@0	30	{
michael@0	31	int headerLength = aLength + 3;
michael@0	32
michael@0	33	aRetBuf[0] = ObexHeaderId::Body;
michael@0	34	aRetBuf[1] = (headerLength & 0xFF00) >> 8;
michael@0	35	aRetBuf[2] = headerLength & 0x00FF;
michael@0	36
michael@0	37	memcpy(&aRetBuf[3], aData, (aLength < aBufferSize - 3)? aLength
michael@0	38	: aBufferSize - 3);
michael@0	39
michael@0	40	return headerLength;
michael@0	41	}
michael@0	42
michael@0	43	int
michael@0	44	AppendHeaderEndOfBody(uint8_t* aRetBuf)
michael@0	45	{
michael@0	46	aRetBuf[0] = ObexHeaderId::EndOfBody;
michael@0	47	aRetBuf[1] = 0x00;
michael@0	48	aRetBuf[2] = 0x03;
michael@0	49
michael@0	50	return 3;
michael@0	51	}
michael@0	52
michael@0	53	int
michael@0	54	AppendHeaderLength(uint8_t* aRetBuf, int aObjectLength)
michael@0	55	{
michael@0	56	aRetBuf[0] = ObexHeaderId::Length;
michael@0	57	aRetBuf[1] = (aObjectLength & 0xFF000000) >> 24;
michael@0	58	aRetBuf[2] = (aObjectLength & 0x00FF0000) >> 16;
michael@0	59	aRetBuf[3] = (aObjectLength & 0x0000FF00) >> 8;
michael@0	60	aRetBuf[4] = aObjectLength & 0x000000FF;
michael@0	61
michael@0	62	return 5;
michael@0	63	}
michael@0	64
michael@0	65	int
michael@0	66	AppendHeaderConnectionId(uint8_t* aRetBuf, int aConnectionId)
michael@0	67	{
michael@0	68	aRetBuf[0] = ObexHeaderId::ConnectionId;
michael@0	69	aRetBuf[1] = (aConnectionId & 0xFF000000) >> 24;
michael@0	70	aRetBuf[2] = (aConnectionId & 0x00FF0000) >> 16;
michael@0	71	aRetBuf[3] = (aConnectionId & 0x0000FF00) >> 8;
michael@0	72	aRetBuf[4] = aConnectionId & 0x000000FF;
michael@0	73
michael@0	74	return 5;
michael@0	75	}
michael@0	76
michael@0	77	void
michael@0	78	SetObexPacketInfo(uint8_t* aRetBuf, uint8_t aOpcode, int aPacketLength)
michael@0	79	{
michael@0	80	aRetBuf[0] = aOpcode;
michael@0	81	aRetBuf[1] = (aPacketLength & 0xFF00) >> 8;
michael@0	82	aRetBuf[2] = aPacketLength & 0x00FF;
michael@0	83	}
michael@0	84
michael@0	85	bool
michael@0	86	ParseHeaders(const uint8_t* aHeaderStart,
michael@0	87	int aTotalLength,
michael@0	88	ObexHeaderSet* aRetHandlerSet)
michael@0	89	{
michael@0	90	const uint8_t* ptr = aHeaderStart;
michael@0	91
michael@0	92	while (ptr - aHeaderStart < aTotalLength) {
michael@0	93	ObexHeaderId headerId = (ObexHeaderId)*ptr++;
michael@0	94
michael@0	95	uint16_t contentLength = 0;
michael@0	96	uint8_t highByte, lowByte;
michael@0	97
michael@0	98	// Defined in 2.1 OBEX Headers, IrOBEX 1.2
michael@0	99	switch (headerId >> 6)
michael@0	100	{
michael@0	101	case 0x00:
michael@0	102	// Null-terminated Unicode text, length prefixed with 2-byte
michael@0	103	// unsigned integer.
michael@0	104	case 0x01:
michael@0	105	// byte sequence, length prefixed with 2 byte unsigned integer.
michael@0	106	highByte = *ptr++;
michael@0	107	lowByte = *ptr++;
michael@0	108	contentLength = (((uint16_t)highByte << 8) | lowByte) - 3;
michael@0	109	break;
michael@0	110
michael@0	111	case 0x02:
michael@0	112	// 1 byte quantity
michael@0	113	contentLength = 1;
michael@0	114	break;
michael@0	115
michael@0	116	case 0x03:
michael@0	117	// 4 byte quantity
michael@0	118	contentLength = 4;
michael@0	119	break;
michael@0	120	}
michael@0	121
michael@0	122	// Length check to prevent from memory pollusion.
michael@0	123	if (ptr + contentLength > aHeaderStart + aTotalLength) {
michael@0	124	// Severe error occurred. We can't even believe the received data, so
michael@0	125	// clear all headers.
michael@0	126	MOZ_ASSERT(false);
michael@0	127	aRetHandlerSet->ClearHeaders();
michael@0	128	return false;
michael@0	129	}
michael@0	130
michael@0	131	aRetHandlerSet->AddHeader(new ObexHeader(headerId, contentLength, ptr));
michael@0	132	ptr += contentLength;
michael@0	133	}
michael@0	134
michael@0	135	return true;
michael@0	136	}
michael@0	137
michael@0	138	END_BLUETOOTH_NAMESPACE