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Fixed rtcp rpsi parsing of invalid packets.

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Added packet type RpsiItem to destinguish parsed rpsi header and Rpsi body
  preventing handling two half-valid (header-only) rpsi packets as one valid,
  making test parser calculate rpsi packet once instead of twice.
Added check padding bits doesn't exceed native bit string length.
Marking rpsi received moved after it is validated.

BUG=600977

Review URL: https://codereview.webrtc.org/1880443002

Cr-Commit-Position: refs/heads/master@{#12318}
This commit is contained in:
danilchap
2016-04-11 10:05:02 -07:00
committed by Commit bot
parent f7704d197b
commit 90a1351072
6 changed files with 60 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
View File

@ -1101,8 +1101,7 @@ RTCPReceiver::HandleRPSI(RTCPUtility::RTCPParserV2& rtcpParser,
{
const RTCPUtility::RTCPPacket& rtcpPacket = rtcpParser.Packet();
RTCPUtility::RTCPPacketTypes pktType = rtcpParser.Iterate();
if (pktType == RTCPPacketTypes::kPsfbRpsi) {
rtcpPacketInformation.rtcpPacketTypeFlags |= kRtcpRpsi; // received signal that we have a confirmed reference picture
if (pktType == RTCPPacketTypes::kPsfbRpsiItem) {
if(rtcpPacket.RPSI.NumberOfValidBits%8 != 0)
{
// to us unknown
@ -1110,6 +1109,8 @@ RTCPReceiver::HandleRPSI(RTCPUtility::RTCPParserV2& rtcpParser,
rtcpParser.Iterate();
return;
}
// Received signal that we have a confirmed reference picture.
rtcpPacketInformation.rtcpPacketTypeFlags |= kRtcpRpsi;
rtcpPacketInformation.rpsiPictureId = 0;
// convert NativeBitString to rpsiPictureId

45
webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
View File

@ -29,6 +29,7 @@
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/pli.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/remb.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rpsi.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sdes.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sender_report.h"
#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h"
@ -165,6 +166,50 @@ TEST_F(RtcpReceiverTest, InvalidFeedbackPacketIsIgnored) {
EXPECT_EQ(0U, rtcp_packet_info_.rtcpPacketTypeFlags);
}
TEST_F(RtcpReceiverTest, RpsiWithFractionalPaddingIsIgnored) {
// Padding size represent fractional number of bytes.
const uint8_t kPaddingSizeBits = 0x0b;
const uint8_t bad_packet[] = {0x83, RTCPUtility::PT_PSFB, 0, 3,
0x12, 0x34, 0x56, 0x78,
0x98, 0x76, 0x54, 0x32,
kPaddingSizeBits, 0x00, 0x00, 0x00};
EXPECT_EQ(0, InjectRtcpPacket(bad_packet, sizeof(bad_packet)));
EXPECT_EQ(0U, rtcp_packet_info_.rtcpPacketTypeFlags);
}
TEST_F(RtcpReceiverTest, RpsiWithTooLargePaddingIsIgnored) {
// Padding size exceeds packet size.
const uint8_t kPaddingSizeBits = 0xa8;
const uint8_t bad_packet[] = {0x83, RTCPUtility::PT_PSFB, 0, 3,
0x12, 0x34, 0x56, 0x78,
0x98, 0x76, 0x54, 0x32,
kPaddingSizeBits, 0x00, 0x00, 0x00};
EXPECT_EQ(0, InjectRtcpPacket(bad_packet, sizeof(bad_packet)));
EXPECT_EQ(0U, rtcp_packet_info_.rtcpPacketTypeFlags);
}
// With parsing using rtcp classes this test will make no sense.
// With current stateful parser this test was failing.
TEST_F(RtcpReceiverTest, TwoHalfValidRpsiAreIgnored) {
const uint8_t bad_packet[] = {0x83, RTCPUtility::PT_PSFB, 0, 2,
0x12, 0x34, 0x56, 0x78,
0x98, 0x76, 0x54, 0x32,
0x83, RTCPUtility::PT_PSFB, 0, 2,
0x12, 0x34, 0x56, 0x78,
0x98, 0x76, 0x54, 0x32};
EXPECT_EQ(0, InjectRtcpPacket(bad_packet, sizeof(bad_packet)));
EXPECT_EQ(0U, rtcp_packet_info_.rtcpPacketTypeFlags);
}
TEST_F(RtcpReceiverTest, InjectRpsiPacket) {
const uint64_t kPictureId = 0x123456789;
rtcp::Rpsi rpsi;
rpsi.WithPictureId(kPictureId);
rtc::Buffer packet = rpsi.Build();
EXPECT_EQ(0, InjectRtcpPacket(packet.data(), packet.size()));
EXPECT_EQ(kRtcpRpsi, rtcp_packet_info_.rtcpPacketTypeFlags);
}
TEST_F(RtcpReceiverTest, InjectSrPacket) {
const uint32_t kSenderSsrc = 0x10203;
rtcp::SenderReport sr;

1
webrtc/modules/rtp_rtcp/source/rtcp_sender_unittest.cc
View File

@ -461,6 +461,7 @@ TEST_F(RtcpSenderTest, SendRpsi) {
feedback_state.send_payload_type = kPayloadType;
EXPECT_EQ(0, rtcp_sender_->SendRTCP(feedback_state, kRtcpRpsi, 0, nullptr,
false, kPictureId));
EXPECT_EQ(1, parser()->rpsi()->num_packets());
EXPECT_EQ(kPayloadType, parser()->rpsi()->PayloadType());
EXPECT_EQ(kPictureId, parser()->rpsi()->PictureId());
}

10
webrtc/modules/rtp_rtcp/source/rtcp_utility.cc
View File

@ -1334,11 +1334,19 @@ bool RTCPUtility::RTCPParserV2::ParseRPSIItem() {
return false;
}
_packetType = RTCPPacketTypes::kPsfbRpsi;
uint8_t padding_bits = *_ptrRTCPData++;
_packet.RPSI.PayloadType = *_ptrRTCPData++;
if (padding_bits > static_cast<uint16_t>(length - 2) * 8) {
_state = ParseState::State_TopLevel;
EndCurrentBlock();
return false;
}
_packetType = RTCPPacketTypes::kPsfbRpsiItem;
memcpy(_packet.RPSI.NativeBitString, _ptrRTCPData, length - 2);
_ptrRTCPData += length - 2;

1
webrtc/modules/rtp_rtcp/source/rtcp_utility.h
View File

@ -272,6 +272,7 @@ enum class RTCPPacketTypes {
kPsfbPli,
kPsfbRpsi,
kPsfbRpsiItem,
kPsfbSli,
kPsfbSliItem,
kPsfbApp,