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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
#include "sdp/SipccSdpAttributeList.h"
#include <ostream>
#include "mozilla/Assertions.h"
extern "C" {
#include "sdp_private.h"
}
namespace mozilla {
using InternalResults = SdpParser::InternalResults;
/* static */
const std::string SipccSdpAttributeList::kEmptyString = "";
SipccSdpAttributeList::SipccSdpAttributeList(
const SipccSdpAttributeList* sessionLevel)
: mSessionLevel(sessionLevel) {
memset(&mAttributes, 0, sizeof(mAttributes));
}
SipccSdpAttributeList::SipccSdpAttributeList(
const SipccSdpAttributeList& aOrig,
const SipccSdpAttributeList* sessionLevel)
: SipccSdpAttributeList(sessionLevel) {
for (size_t i = 0; i < kNumAttributeTypes; ++i) {
if (aOrig.mAttributes[i]) {
mAttributes[i] = aOrig.mAttributes[i]->Clone();
}
}
}
SipccSdpAttributeList::~SipccSdpAttributeList() {
for (size_t i = 0; i < kNumAttributeTypes; ++i) {
delete mAttributes[i];
}
}
bool SipccSdpAttributeList::HasAttribute(AttributeType type,
bool sessionFallback) const {
return !!GetAttribute(type, sessionFallback);
}
const SdpAttribute* SipccSdpAttributeList::GetAttribute(
AttributeType type, bool sessionFallback) const {
const SdpAttribute* value = mAttributes[static_cast<size_t>(type)];
// Only do fallback when the attribute can appear at both the media and
// session level
if (!value && !AtSessionLevel() && sessionFallback &&
SdpAttribute::IsAllowedAtSessionLevel(type) &&
SdpAttribute::IsAllowedAtMediaLevel(type)) {
return mSessionLevel->GetAttribute(type, false);
}
return value;
}
void SipccSdpAttributeList::RemoveAttribute(AttributeType type) {
delete mAttributes[static_cast<size_t>(type)];
mAttributes[static_cast<size_t>(type)] = nullptr;
}
void SipccSdpAttributeList::Clear() {
for (size_t i = 0; i < kNumAttributeTypes; ++i) {
RemoveAttribute(static_cast<AttributeType>(i));
}
}
uint32_t SipccSdpAttributeList::Count() const {
uint32_t count = 0;
for (size_t i = 0; i < kNumAttributeTypes; ++i) {
if (mAttributes[i]) {
count++;
}
}
return count;
}
void SipccSdpAttributeList::SetAttribute(SdpAttribute* attr) {
if (!IsAllowedHere(attr->GetType())) {
MOZ_ASSERT(false, "This type of attribute is not allowed here");
return;
}
RemoveAttribute(attr->GetType());
mAttributes[attr->GetType()] = attr;
}
void SipccSdpAttributeList::LoadSimpleString(sdp_t* sdp, uint16_t level,
sdp_attr_e attr,
AttributeType targetType,
InternalResults& results) {
const char* value = sdp_attr_get_simple_string(sdp, attr, level, 0, 1);
if (value) {
if (!IsAllowedHere(targetType)) {
uint32_t lineNumber = sdp_attr_line_number(sdp, attr, level, 0, 1);
WarnAboutMisplacedAttribute(targetType, lineNumber, results);
} else {
SetAttribute(new SdpStringAttribute(targetType, std::string(value)));
}
}
}
void SipccSdpAttributeList::LoadSimpleStrings(sdp_t* sdp, uint16_t level,
InternalResults& results) {
LoadSimpleString(sdp, level, SDP_ATTR_MID, SdpAttribute::kMidAttribute,
results);
LoadSimpleString(sdp, level, SDP_ATTR_LABEL, SdpAttribute::kLabelAttribute,
results);
}
void SipccSdpAttributeList::LoadSimpleNumber(sdp_t* sdp, uint16_t level,
sdp_attr_e attr,
AttributeType targetType,
InternalResults& results) {
if (sdp_attr_valid(sdp, attr, level, 0, 1)) {
if (!IsAllowedHere(targetType)) {
uint32_t lineNumber = sdp_attr_line_number(sdp, attr, level, 0, 1);
WarnAboutMisplacedAttribute(targetType, lineNumber, results);
} else {
uint32_t value = sdp_attr_get_simple_u32(sdp, attr, level, 0, 1);
SetAttribute(new SdpNumberAttribute(targetType, value));
}
}
}
void SipccSdpAttributeList::LoadSimpleNumbers(sdp_t* sdp, uint16_t level,
InternalResults& results) {
LoadSimpleNumber(sdp, level, SDP_ATTR_PTIME, SdpAttribute::kPtimeAttribute,
results);
LoadSimpleNumber(sdp, level, SDP_ATTR_MAXPTIME,
SdpAttribute::kMaxptimeAttribute, results);
LoadSimpleNumber(sdp, level, SDP_ATTR_SCTPPORT,
SdpAttribute::kSctpPortAttribute, results);
LoadSimpleNumber(sdp, level, SDP_ATTR_MAXMESSAGESIZE,
SdpAttribute::kMaxMessageSizeAttribute, results);
}
void SipccSdpAttributeList::LoadFlags(sdp_t* sdp, uint16_t level) {
if (AtSessionLevel()) {
if (sdp_attr_valid(sdp, SDP_ATTR_ICE_LITE, level, 0, 1)) {
SetAttribute(new SdpFlagAttribute(SdpAttribute::kIceLiteAttribute));
}
} else { // media-level
if (sdp_attr_valid(sdp, SDP_ATTR_RTCP_MUX, level, 0, 1)) {
SetAttribute(new SdpFlagAttribute(SdpAttribute::kRtcpMuxAttribute));
}
if (sdp_attr_valid(sdp, SDP_ATTR_END_OF_CANDIDATES, level, 0, 1)) {
SetAttribute(
new SdpFlagAttribute(SdpAttribute::kEndOfCandidatesAttribute));
}
if (sdp_attr_valid(sdp, SDP_ATTR_BUNDLE_ONLY, level, 0, 1)) {
SetAttribute(new SdpFlagAttribute(SdpAttribute::kBundleOnlyAttribute));
}
if (sdp_attr_valid(sdp, SDP_ATTR_RTCP_RSIZE, level, 0, 1))
SetAttribute(new SdpFlagAttribute(SdpAttribute::kRtcpRsizeAttribute));
}
}
static void ConvertDirection(sdp_direction_e sipcc_direction,
SdpDirectionAttribute::Direction* dir_outparam) {
switch (sipcc_direction) {
case SDP_DIRECTION_SENDRECV:
*dir_outparam = SdpDirectionAttribute::kSendrecv;
return;
case SDP_DIRECTION_SENDONLY:
*dir_outparam = SdpDirectionAttribute::kSendonly;
return;
case SDP_DIRECTION_RECVONLY:
*dir_outparam = SdpDirectionAttribute::kRecvonly;
return;
case SDP_DIRECTION_INACTIVE:
*dir_outparam = SdpDirectionAttribute::kInactive;
return;
case SDP_MAX_QOS_DIRECTIONS:
// Nothing actually sets this value.
// Fall through to MOZ_CRASH below.
{}
}
MOZ_CRASH("Invalid direction from sipcc; this is probably corruption");
}
void SipccSdpAttributeList::LoadDirection(sdp_t* sdp, uint16_t level,
InternalResults& results) {
SdpDirectionAttribute::Direction dir;
ConvertDirection(sdp_get_media_direction(sdp, level, 0), &dir);
SetAttribute(new SdpDirectionAttribute(dir));
}
void SipccSdpAttributeList::LoadIceAttributes(sdp_t* sdp, uint16_t level) {
char* value;
sdp_result_e sdpres =
sdp_attr_get_ice_attribute(sdp, level, 0, SDP_ATTR_ICE_UFRAG, 1, &value);
if (sdpres == SDP_SUCCESS) {
SetAttribute(new SdpStringAttribute(SdpAttribute::kIceUfragAttribute,
std::string(value)));
}
sdpres =
sdp_attr_get_ice_attribute(sdp, level, 0, SDP_ATTR_ICE_PWD, 1, &value);
if (sdpres == SDP_SUCCESS) {
SetAttribute(new SdpStringAttribute(SdpAttribute::kIcePwdAttribute,
std::string(value)));
}
const char* iceOptVal =
sdp_attr_get_simple_string(sdp, SDP_ATTR_ICE_OPTIONS, level, 0, 1);
if (iceOptVal) {
auto* iceOptions =
new SdpOptionsAttribute(SdpAttribute::kIceOptionsAttribute);
iceOptions->Load(iceOptVal);
SetAttribute(iceOptions);
}
}
bool SipccSdpAttributeList::LoadFingerprint(sdp_t* sdp, uint16_t level,
InternalResults& results) {
char* value;
UniquePtr<SdpFingerprintAttributeList> fingerprintAttrs;
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_result_e result = sdp_attr_get_dtls_fingerprint_attribute(
sdp, level, 0, SDP_ATTR_DTLS_FINGERPRINT, i, &value);
if (result != SDP_SUCCESS) {
break;
}
std::string fingerprintAttr(value);
uint32_t lineNumber =
sdp_attr_line_number(sdp, SDP_ATTR_DTLS_FINGERPRINT, level, 0, i);
// sipcc does not expose parse code for this
size_t start = fingerprintAttr.find_first_not_of(" \t");
if (start == std::string::npos) {
results.AddParseError(lineNumber, "Empty fingerprint attribute");
return false;
}
size_t end = fingerprintAttr.find_first_of(" \t", start);
if (end == std::string::npos) {
// One token, no trailing ws
results.AddParseError(lineNumber,
"Only one token in fingerprint attribute");
return false;
}
std::string algorithmToken(fingerprintAttr.substr(start, end - start));
start = fingerprintAttr.find_first_not_of(" \t", end);
if (start == std::string::npos) {
// One token, trailing ws
results.AddParseError(lineNumber,
"Only one token in fingerprint attribute");
return false;
}
std::string fingerprintToken(fingerprintAttr.substr(start));
std::vector<uint8_t> fingerprint =
SdpFingerprintAttributeList::ParseFingerprint(fingerprintToken);
if (fingerprint.empty()) {
results.AddParseError(lineNumber, "Malformed fingerprint token");
return false;
}
if (!fingerprintAttrs) {
fingerprintAttrs.reset(new SdpFingerprintAttributeList);
}
// Don't assert on unknown algorithm, just skip
fingerprintAttrs->PushEntry(algorithmToken, fingerprint, false);
}
if (fingerprintAttrs) {
SetAttribute(fingerprintAttrs.release());
}
return true;
}
void SipccSdpAttributeList::LoadCandidate(sdp_t* sdp, uint16_t level) {
char* value;
auto candidates =
MakeUnique<SdpMultiStringAttribute>(SdpAttribute::kCandidateAttribute);
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_result_e result = sdp_attr_get_ice_attribute(
sdp, level, 0, SDP_ATTR_ICE_CANDIDATE, i, &value);
if (result != SDP_SUCCESS) {
break;
}
candidates->mValues.push_back(value);
}
if (!candidates->mValues.empty()) {
SetAttribute(candidates.release());
}
}
bool SipccSdpAttributeList::LoadSctpmap(sdp_t* sdp, uint16_t level,
InternalResults& results) {
auto sctpmap = MakeUnique<SdpSctpmapAttributeList>();
for (uint16_t i = 0; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_SCTPMAP, i + 1);
if (!attr) {
break;
}
// Yeah, this is a little weird, but for now we'll just store this as a
// payload type.
uint16_t payloadType = attr->attr.sctpmap.port;
uint16_t streams = attr->attr.sctpmap.streams;
const char* name = attr->attr.sctpmap.protocol;
std::ostringstream osPayloadType;
osPayloadType << payloadType;
sctpmap->PushEntry(osPayloadType.str(), name, streams);
}
if (!sctpmap->mSctpmaps.empty()) {
SetAttribute(sctpmap.release());
}
return true;
}
SdpRtpmapAttributeList::CodecType SipccSdpAttributeList::GetCodecType(
rtp_ptype type) {
switch (type) {
case RTP_PCMU:
return SdpRtpmapAttributeList::kPCMU;
case RTP_PCMA:
return SdpRtpmapAttributeList::kPCMA;
case RTP_G722:
return SdpRtpmapAttributeList::kG722;
case RTP_H264_P0:
case RTP_H264_P1:
return SdpRtpmapAttributeList::kH264;
case RTP_OPUS:
return SdpRtpmapAttributeList::kOpus;
case RTP_VP8:
return SdpRtpmapAttributeList::kVP8;
case RTP_VP9:
return SdpRtpmapAttributeList::kVP9;
case RTP_RED:
return SdpRtpmapAttributeList::kRed;
case RTP_ULPFEC:
return SdpRtpmapAttributeList::kUlpfec;
case RTP_RTX:
return SdpRtpmapAttributeList::kRtx;
case RTP_TELEPHONE_EVENT:
return SdpRtpmapAttributeList::kTelephoneEvent;
case RTP_NONE:
// Happens when sipcc doesn't know how to translate to the enum
case RTP_CELP:
case RTP_G726:
case RTP_GSM:
case RTP_G723:
case RTP_DVI4:
case RTP_DVI4_II:
case RTP_LPC:
case RTP_G728:
case RTP_G729:
case RTP_JPEG:
case RTP_NV:
case RTP_H261:
case RTP_L16:
case RTP_H263:
case RTP_ILBC:
case RTP_I420:
return SdpRtpmapAttributeList::kOtherCodec;
}
MOZ_CRASH("Invalid codec type from sipcc. Probably corruption.");
}
bool SipccSdpAttributeList::LoadRtpmap(sdp_t* sdp, uint16_t level,
InternalResults& results) {
auto rtpmap = MakeUnique<SdpRtpmapAttributeList>();
uint16_t count;
sdp_result_e result =
sdp_attr_num_instances(sdp, level, 0, SDP_ATTR_RTPMAP, &count);
if (result != SDP_SUCCESS) {
MOZ_ASSERT(false, "Unable to get rtpmap size");
results.AddParseError(sdp_get_media_line_number(sdp, level),
"Unable to get rtpmap size");
return false;
}
for (uint16_t i = 0; i < count; ++i) {
uint16_t pt = sdp_attr_get_rtpmap_payload_type(sdp, level, 0, i + 1);
const char* ccName = sdp_attr_get_rtpmap_encname(sdp, level, 0, i + 1);
if (!ccName) {
// Probably no rtpmap attribute for a pt in an m-line
results.AddParseError(sdp_get_media_line_number(sdp, level),
"No rtpmap attribute for payload type");
continue;
}
std::string name(ccName);
SdpRtpmapAttributeList::CodecType codec =
GetCodecType(sdp_get_known_payload_type(sdp, level, pt));
uint32_t clock = sdp_attr_get_rtpmap_clockrate(sdp, level, 0, i + 1);
uint16_t channels = 0;
// sipcc gives us a channels value of "1" for video
if (sdp_get_media_type(sdp, level) == SDP_MEDIA_AUDIO) {
channels = sdp_attr_get_rtpmap_num_chan(sdp, level, 0, i + 1);
}
std::ostringstream osPayloadType;
osPayloadType << pt;
rtpmap->PushEntry(osPayloadType.str(), codec, name, clock, channels);
}
if (!rtpmap->mRtpmaps.empty()) {
SetAttribute(rtpmap.release());
}
return true;
}
void SipccSdpAttributeList::LoadSetup(sdp_t* sdp, uint16_t level) {
sdp_setup_type_e setupType;
auto sdpres = sdp_attr_get_setup_attribute(sdp, level, 0, 1, &setupType);
if (sdpres != SDP_SUCCESS) {
return;
}
switch (setupType) {
case SDP_SETUP_ACTIVE:
SetAttribute(new SdpSetupAttribute(SdpSetupAttribute::kActive));
return;
case SDP_SETUP_PASSIVE:
SetAttribute(new SdpSetupAttribute(SdpSetupAttribute::kPassive));
return;
case SDP_SETUP_ACTPASS:
SetAttribute(new SdpSetupAttribute(SdpSetupAttribute::kActpass));
return;
case SDP_SETUP_HOLDCONN:
SetAttribute(new SdpSetupAttribute(SdpSetupAttribute::kHoldconn));
return;
case SDP_SETUP_UNKNOWN:
return;
case SDP_SETUP_NOT_FOUND:
case SDP_MAX_SETUP:
// There is no code that will set these.
// Fall through to MOZ_CRASH() below.
{}
}
MOZ_CRASH("Invalid setup type from sipcc. This is probably corruption.");
}
void SipccSdpAttributeList::LoadSsrc(sdp_t* sdp, uint16_t level) {
auto ssrcs = MakeUnique<SdpSsrcAttributeList>();
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_SSRC, i);
if (!attr) {
break;
}
sdp_ssrc_t* ssrc = &(attr->attr.ssrc);
ssrcs->PushEntry(ssrc->ssrc, ssrc->attribute);
}
if (!ssrcs->mSsrcs.empty()) {
SetAttribute(ssrcs.release());
}
}
void SipccSdpAttributeList::LoadSsrcGroup(sdp_t* sdp, uint16_t level) {
auto ssrcGroups = MakeUnique<SdpSsrcGroupAttributeList>();
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_SSRC_GROUP, i);
if (!attr) {
break;
}
sdp_ssrc_group_t* ssrc_group = &(attr->attr.ssrc_group);
SdpSsrcGroupAttributeList::Semantics semantic;
switch (ssrc_group->semantic) {
case SDP_SSRC_GROUP_ATTR_FEC:
semantic = SdpSsrcGroupAttributeList::kFec;
break;
case SDP_SSRC_GROUP_ATTR_FID:
semantic = SdpSsrcGroupAttributeList::kFid;
break;
case SDP_SSRC_GROUP_ATTR_FECFR:
semantic = SdpSsrcGroupAttributeList::kFecFr;
break;
case SDP_SSRC_GROUP_ATTR_DUP:
semantic = SdpSsrcGroupAttributeList::kDup;
break;
case SDP_SSRC_GROUP_ATTR_SIM:
semantic = SdpSsrcGroupAttributeList::kSim;
break;
case SDP_MAX_SSRC_GROUP_ATTR_VAL:
continue;
case SDP_SSRC_GROUP_ATTR_UNSUPPORTED:
continue;
}
std::vector<uint32_t> ssrcs;
ssrcs.reserve(ssrc_group->num_ssrcs);
for (int i = 0; i < ssrc_group->num_ssrcs; ++i) {
ssrcs.push_back(ssrc_group->ssrcs[i]);
}
ssrcGroups->PushEntry(semantic, ssrcs);
}
if (!ssrcGroups->mSsrcGroups.empty()) {
SetAttribute(ssrcGroups.release());
}
}
bool SipccSdpAttributeList::LoadImageattr(sdp_t* sdp, uint16_t level,
InternalResults& results) {
UniquePtr<SdpImageattrAttributeList> imageattrs(
new SdpImageattrAttributeList);
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
const char* imageattrRaw =
sdp_attr_get_simple_string(sdp, SDP_ATTR_IMAGEATTR, level, 0, i);
if (!imageattrRaw) {
break;
}
std::string error;
size_t errorPos;
if (!imageattrs->PushEntry(imageattrRaw, &error, &errorPos)) {
std::ostringstream fullError;
fullError << error << " at column " << errorPos;
results.AddParseError(
sdp_attr_line_number(sdp, SDP_ATTR_IMAGEATTR, level, 0, i),
fullError.str());
return false;
}
}
if (!imageattrs->mImageattrs.empty()) {
SetAttribute(imageattrs.release());
}
return true;
}
bool SipccSdpAttributeList::LoadSimulcast(sdp_t* sdp, uint16_t level,
InternalResults& results) {
const char* simulcastRaw =
sdp_attr_get_simple_string(sdp, SDP_ATTR_SIMULCAST, level, 0, 1);
if (!simulcastRaw) {
return true;
}
UniquePtr<SdpSimulcastAttribute> simulcast(new SdpSimulcastAttribute);
std::istringstream is(simulcastRaw);
std::string error;
if (!simulcast->Parse(is, &error)) {
std::ostringstream fullError;
fullError << error << " at column " << is.tellg();
results.AddParseError(
sdp_attr_line_number(sdp, SDP_ATTR_SIMULCAST, level, 0, 1),
fullError.str());
return false;
}
SetAttribute(simulcast.release());
return true;
}
bool SipccSdpAttributeList::LoadGroups(sdp_t* sdp, uint16_t level,
InternalResults& results) {
uint16_t attrCount = 0;
if (sdp_attr_num_instances(sdp, level, 0, SDP_ATTR_GROUP, &attrCount) !=
SDP_SUCCESS) {
MOZ_ASSERT(false, "Could not get count of group attributes");
results.AddParseError(0, "Could not get count of group attributes");
return false;
}
UniquePtr<SdpGroupAttributeList> groups = MakeUnique<SdpGroupAttributeList>();
for (uint16_t attr = 1; attr <= attrCount; ++attr) {
SdpGroupAttributeList::Semantics semantics;
std::vector<std::string> tags;
switch (sdp_get_group_attr(sdp, level, 0, attr)) {
case SDP_GROUP_ATTR_FID:
semantics = SdpGroupAttributeList::kFid;
break;
case SDP_GROUP_ATTR_LS:
semantics = SdpGroupAttributeList::kLs;
break;
case SDP_GROUP_ATTR_ANAT:
semantics = SdpGroupAttributeList::kAnat;
break;
case SDP_GROUP_ATTR_BUNDLE:
semantics = SdpGroupAttributeList::kBundle;
break;
default:
continue;
}
uint16_t idCount = sdp_get_group_num_id(sdp, level, 0, attr);
for (uint16_t id = 1; id <= idCount; ++id) {
const char* idStr = sdp_get_group_id(sdp, level, 0, attr, id);
if (!idStr) {
std::ostringstream os;
os << "bad a=group identifier at " << (attr - 1) << ", " << (id - 1);
results.AddParseError(0, os.str());
return false;
}
tags.push_back(std::string(idStr));
}
groups->PushEntry(semantics, tags);
}
if (!groups->mGroups.empty()) {
SetAttribute(groups.release());
}
return true;
}
bool SipccSdpAttributeList::LoadMsidSemantics(sdp_t* sdp, uint16_t level,
InternalResults& results) {
auto msidSemantics = MakeUnique<SdpMsidSemanticAttributeList>();
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_MSID_SEMANTIC, i);
if (!attr) {
break;
}
sdp_msid_semantic_t* msid_semantic = &(attr->attr.msid_semantic);
std::vector<std::string> msids;
for (size_t i = 0; i < SDP_MAX_MEDIA_STREAMS; ++i) {
if (!msid_semantic->msids[i]) {
break;
}
msids.push_back(msid_semantic->msids[i]);
}
msidSemantics->PushEntry(msid_semantic->semantic, msids);
}
if (!msidSemantics->mMsidSemantics.empty()) {
SetAttribute(msidSemantics.release());
}
return true;
}
void SipccSdpAttributeList::LoadIdentity(sdp_t* sdp, uint16_t level) {
const char* val =
sdp_attr_get_long_string(sdp, SDP_ATTR_IDENTITY, level, 0, 1);
if (val) {
SetAttribute(new SdpStringAttribute(SdpAttribute::kIdentityAttribute,
std::string(val)));
}
}
void SipccSdpAttributeList::LoadDtlsMessage(sdp_t* sdp, uint16_t level) {
const char* val =
sdp_attr_get_long_string(sdp, SDP_ATTR_DTLS_MESSAGE, level, 0, 1);
if (val) {
// sipcc does not expose parse code for this, so we use a SDParta-provided
// parser
std::string strval(val);
SetAttribute(new SdpDtlsMessageAttribute(strval));
}
}
void SipccSdpAttributeList::LoadFmtp(sdp_t* sdp, uint16_t level) {
auto fmtps = MakeUnique<SdpFmtpAttributeList>();
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_FMTP, i);
if (!attr) {
break;
}
sdp_fmtp_t* fmtp = &(attr->attr.fmtp);
// Get the payload type
std::stringstream osPayloadType;
// payload_num is the number in the fmtp attribute, verbatim
osPayloadType << fmtp->payload_num;
// Get parsed form of parameters, if supported
UniquePtr<SdpFmtpAttributeList::Parameters> parameters;
rtp_ptype codec = sdp_get_known_payload_type(sdp, level, fmtp->payload_num);
switch (codec) {
case RTP_H264_P0:
case RTP_H264_P1: {
SdpFmtpAttributeList::H264Parameters* h264Parameters(
new SdpFmtpAttributeList::H264Parameters);
sstrncpy(h264Parameters->sprop_parameter_sets, fmtp->parameter_sets,
sizeof(h264Parameters->sprop_parameter_sets));
h264Parameters->level_asymmetry_allowed =
!!(fmtp->level_asymmetry_allowed);
h264Parameters->packetization_mode = fmtp->packetization_mode;
sscanf(fmtp->profile_level_id, "%x", &h264Parameters->profile_level_id);
h264Parameters->max_mbps = fmtp->max_mbps;
h264Parameters->max_fs = fmtp->max_fs;
h264Parameters->max_cpb = fmtp->max_cpb;
h264Parameters->max_dpb = fmtp->max_dpb;
h264Parameters->max_br = fmtp->max_br;
parameters.reset(h264Parameters);
} break;
case RTP_VP9: {
SdpFmtpAttributeList::VP8Parameters* vp9Parameters(
new SdpFmtpAttributeList::VP8Parameters(
SdpRtpmapAttributeList::kVP9));
vp9Parameters->max_fs = fmtp->max_fs;
vp9Parameters->max_fr = fmtp->max_fr;
parameters.reset(vp9Parameters);
} break;
case RTP_VP8: {
SdpFmtpAttributeList::VP8Parameters* vp8Parameters(
new SdpFmtpAttributeList::VP8Parameters(
SdpRtpmapAttributeList::kVP8));
vp8Parameters->max_fs = fmtp->max_fs;
vp8Parameters->max_fr = fmtp->max_fr;
parameters.reset(vp8Parameters);
} break;
case RTP_RED: {
SdpFmtpAttributeList::RedParameters* redParameters(
new SdpFmtpAttributeList::RedParameters);
for (int i = 0; i < SDP_FMTP_MAX_REDUNDANT_ENCODINGS &&
fmtp->redundant_encodings[i];
++i) {
redParameters->encodings.push_back(fmtp->redundant_encodings[i]);
}
parameters.reset(redParameters);
} break;
case RTP_OPUS: {
SdpFmtpAttributeList::OpusParameters* opusParameters(
new SdpFmtpAttributeList::OpusParameters);
opusParameters->maxplaybackrate = fmtp->maxplaybackrate;
opusParameters->stereo = fmtp->stereo;
opusParameters->useInBandFec = fmtp->useinbandfec;
opusParameters->maxAverageBitrate = fmtp->maxaveragebitrate;
opusParameters->useDTX = fmtp->usedtx;
parameters.reset(opusParameters);
} break;
case RTP_TELEPHONE_EVENT: {
SdpFmtpAttributeList::TelephoneEventParameters* teParameters(
new SdpFmtpAttributeList::TelephoneEventParameters);
if (strlen(fmtp->dtmf_tones) > 0) {
teParameters->dtmfTones = fmtp->dtmf_tones;
}
parameters.reset(teParameters);
} break;
case RTP_RTX: {
SdpFmtpAttributeList::RtxParameters* rtxParameters(
new SdpFmtpAttributeList::RtxParameters);
rtxParameters->apt = fmtp->apt;
if (fmtp->has_rtx_time == TRUE) {
rtxParameters->rtx_time = Some(fmtp->rtx_time);
}
parameters.reset(rtxParameters);
} break;
default: {
}
}
if (parameters) {
fmtps->PushEntry(osPayloadType.str(), *parameters);
}
}
if (!fmtps->mFmtps.empty()) {
SetAttribute(fmtps.release());
}
}
void SipccSdpAttributeList::LoadMsids(sdp_t* sdp, uint16_t level,
InternalResults& results) {
uint16_t attrCount = 0;
if (sdp_attr_num_instances(sdp, level, 0, SDP_ATTR_MSID, &attrCount) !=
SDP_SUCCESS) {
MOZ_ASSERT(false, "Unable to get count of msid attributes");
results.AddParseError(0, "Unable to get count of msid attributes");
return;
}
auto msids = MakeUnique<SdpMsidAttributeList>();
for (uint16_t i = 1; i <= attrCount; ++i) {
uint32_t lineNumber = sdp_attr_line_number(sdp, SDP_ATTR_MSID, level, 0, i);
const char* identifier = sdp_attr_get_msid_identifier(sdp, level, 0, i);
if (!identifier) {
results.AddParseError(lineNumber, "msid attribute with bad identity");
continue;
}
const char* appdata = sdp_attr_get_msid_appdata(sdp, level, 0, i);
if (!appdata) {
results.AddParseError(lineNumber, "msid attribute with bad appdata");
continue;
}
msids->PushEntry(identifier, appdata);
}
if (!msids->mMsids.empty()) {
SetAttribute(msids.release());
}
}
bool SipccSdpAttributeList::LoadRid(sdp_t* sdp, uint16_t level,
InternalResults& results) {
UniquePtr<SdpRidAttributeList> rids(new SdpRidAttributeList);
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
const char* ridRaw =
sdp_attr_get_simple_string(sdp, SDP_ATTR_RID, level, 0, i);
if (!ridRaw) {
break;
}
std::string error;
size_t errorPos;
if (!rids->PushEntry(ridRaw, &error, &errorPos)) {
std::ostringstream fullError;
fullError << error << " at column " << errorPos;
results.AddParseError(
sdp_attr_line_number(sdp, SDP_ATTR_RID, level, 0, i),
fullError.str());
return false;
}
}
if (!rids->mRids.empty()) {
SetAttribute(rids.release());
}
return true;
}
void SipccSdpAttributeList::LoadExtmap(sdp_t* sdp, uint16_t level,
InternalResults& results) {
auto extmaps = MakeUnique<SdpExtmapAttributeList>();
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_EXTMAP, i);
if (!attr) {
break;
}
sdp_extmap_t* extmap = &(attr->attr.extmap);
SdpDirectionAttribute::Direction dir = SdpDirectionAttribute::kSendrecv;
if (extmap->media_direction_specified) {
ConvertDirection(extmap->media_direction, &dir);
}
extmaps->PushEntry(extmap->id, dir, extmap->media_direction_specified,
extmap->uri, extmap->extension_attributes);
}
if (!extmaps->mExtmaps.empty()) {
if (!AtSessionLevel() &&
mSessionLevel->HasAttribute(SdpAttribute::kExtmapAttribute)) {
uint32_t lineNumber =
sdp_attr_line_number(sdp, SDP_ATTR_EXTMAP, level, 0, 1);
results.AddParseError(
lineNumber, "extmap attributes in both session and media level");
}
SetAttribute(extmaps.release());
}
}
void SipccSdpAttributeList::LoadRtcpFb(sdp_t* sdp, uint16_t level,
InternalResults& results) {
auto rtcpfbs = MakeUnique<SdpRtcpFbAttributeList>();
for (uint16_t i = 1; i < UINT16_MAX; ++i) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_RTCP_FB, i);
if (!attr) {
break;
}
sdp_fmtp_fb_t* rtcpfb = &attr->attr.rtcp_fb;
SdpRtcpFbAttributeList::Type type;
std::string parameter;
// Set type and parameter
switch (rtcpfb->feedback_type) {
case SDP_RTCP_FB_ACK:
type = SdpRtcpFbAttributeList::kAck;
switch (rtcpfb->param.ack) {
// TODO: sipcc doesn't seem to support ack with no following token.
// Issue 189.
case SDP_RTCP_FB_ACK_RPSI:
parameter = SdpRtcpFbAttributeList::rpsi;
break;
case SDP_RTCP_FB_ACK_APP:
parameter = SdpRtcpFbAttributeList::app;
break;
default:
// Type we don't care about, ignore.
continue;
}
break;
case SDP_RTCP_FB_CCM:
type = SdpRtcpFbAttributeList::kCcm;
switch (rtcpfb->param.ccm) {
case SDP_RTCP_FB_CCM_FIR:
parameter = SdpRtcpFbAttributeList::fir;
break;
case SDP_RTCP_FB_CCM_TMMBR:
parameter = SdpRtcpFbAttributeList::tmmbr;
break;
case SDP_RTCP_FB_CCM_TSTR:
parameter = SdpRtcpFbAttributeList::tstr;
break;
case SDP_RTCP_FB_CCM_VBCM:
parameter = SdpRtcpFbAttributeList::vbcm;
break;
default:
// Type we don't care about, ignore.
continue;
}
break;
case SDP_RTCP_FB_NACK:
type = SdpRtcpFbAttributeList::kNack;
switch (rtcpfb->param.nack) {
case SDP_RTCP_FB_NACK_BASIC:
break;
case SDP_RTCP_FB_NACK_SLI:
parameter = SdpRtcpFbAttributeList::sli;
break;
case SDP_RTCP_FB_NACK_PLI:
parameter = SdpRtcpFbAttributeList::pli;
break;
case SDP_RTCP_FB_NACK_RPSI:
parameter = SdpRtcpFbAttributeList::rpsi;
break;
case SDP_RTCP_FB_NACK_APP:
parameter = SdpRtcpFbAttributeList::app;
break;
default:
// Type we don't care about, ignore.
continue;
}
break;
case SDP_RTCP_FB_TRR_INT: {
type = SdpRtcpFbAttributeList::kTrrInt;
std::ostringstream os;
os << rtcpfb->param.trr_int;
parameter = os.str();
} break;
case SDP_RTCP_FB_REMB: {
type = SdpRtcpFbAttributeList::kRemb;
} break;
case SDP_RTCP_FB_TRANSPORT_CC: {
type = SdpRtcpFbAttributeList::kTransportCC;
} break;
default:
// Type we don't care about, ignore.
continue;
}
std::stringstream osPayloadType;
if (rtcpfb->payload_num == UINT16_MAX) {
osPayloadType << "*";
} else {
osPayloadType << rtcpfb->payload_num;
}
std::string pt(osPayloadType.str());
std::string extra(rtcpfb->extra);
rtcpfbs->PushEntry(pt, type, parameter, extra);
}
if (!rtcpfbs->mFeedbacks.empty()) {
SetAttribute(rtcpfbs.release());
}
}
void SipccSdpAttributeList::LoadRtcp(sdp_t* sdp, uint16_t level,
InternalResults& results) {
sdp_attr_t* attr = sdp_find_attr(sdp, level, 0, SDP_ATTR_RTCP, 1);
if (!attr) {
return;
}
sdp_rtcp_t* rtcp = &attr->attr.rtcp;
if (rtcp->nettype != SDP_NT_INTERNET) {
return;
}
if (rtcp->addrtype != SDP_AT_IP4 && rtcp->addrtype != SDP_AT_IP6) {
return;
}
if (!strlen(rtcp->addr)) {
SetAttribute(new SdpRtcpAttribute(rtcp->port));
} else {
SetAttribute(new SdpRtcpAttribute(
rtcp->port, sdp::kInternet,
rtcp->addrtype == SDP_AT_IP4 ? sdp::kIPv4 : sdp::kIPv6, rtcp->addr));
}
}
bool SipccSdpAttributeList::Load(sdp_t* sdp, uint16_t level,
InternalResults& results) {
LoadSimpleStrings(sdp, level, results);
LoadSimpleNumbers(sdp, level, results);
LoadFlags(sdp, level);
LoadDirection(sdp, level, results);
if (AtSessionLevel()) {
if (!LoadGroups(sdp, level, results)) {
return false;
}
if (!LoadMsidSemantics(sdp, level, results)) {
return false;
}
LoadIdentity(sdp, level);
LoadDtlsMessage(sdp, level);
} else {
sdp_media_e mtype = sdp_get_media_type(sdp, level);
if (mtype == SDP_MEDIA_APPLICATION) {
LoadSctpmap(sdp, level, results);
} else {
if (!LoadRtpmap(sdp, level, results)) {
return false;
}
}
LoadCandidate(sdp, level);
LoadFmtp(sdp, level);
LoadMsids(sdp, level, results);
LoadRtcpFb(sdp, level, results);
LoadRtcp(sdp, level, results);
LoadSsrc(sdp, level);
LoadSsrcGroup(sdp, level);
if (!LoadImageattr(sdp, level, results)) {
return false;
}
if (!LoadSimulcast(sdp, level, results)) {
return false;
}
if (!LoadRid(sdp, level, results)) {
return false;
}
}
LoadIceAttributes(sdp, level);
if (!LoadFingerprint(sdp, level, results)) {
return false;
}
LoadSetup(sdp, level);
LoadExtmap(sdp, level, results);
return true;
}
bool SipccSdpAttributeList::IsAllowedHere(
SdpAttribute::AttributeType type) const {
if (AtSessionLevel() && !SdpAttribute::IsAllowedAtSessionLevel(type)) {
return false;
}
if (!AtSessionLevel() && !SdpAttribute::IsAllowedAtMediaLevel(type)) {
return false;
}
return true;
}
void SipccSdpAttributeList::WarnAboutMisplacedAttribute(
SdpAttribute::AttributeType type, uint32_t lineNumber,
InternalResults& results) {
std::string warning = SdpAttribute::GetAttributeTypeString(type) +
(AtSessionLevel() ? " at session level. Ignoring."
: " at media level. Ignoring.");
results.AddParseError(lineNumber, warning);
}
const std::vector<std::string>& SipccSdpAttributeList::GetCandidate() const {
if (!HasAttribute(SdpAttribute::kCandidateAttribute)) {
MOZ_CRASH();
}
return static_cast<const SdpMultiStringAttribute*>(
GetAttribute(SdpAttribute::kCandidateAttribute))
->mValues;
}
const SdpConnectionAttribute& SipccSdpAttributeList::GetConnection() const {
if (!HasAttribute(SdpAttribute::kConnectionAttribute)) {
MOZ_CRASH();
}
return *static_cast<const SdpConnectionAttribute*>(
GetAttribute(SdpAttribute::kConnectionAttribute));
}
SdpDirectionAttribute::Direction SipccSdpAttributeList::GetDirection() const {
if (!HasAttribute(SdpAttribute::kDirectionAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kDirectionAttribute);
return static_cast<const SdpDirectionAttribute*>(attr)->mValue;
}
const SdpDtlsMessageAttribute& SipccSdpAttributeList::GetDtlsMessage() const {
if (!HasAttribute(SdpAttribute::kDtlsMessageAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kDtlsMessageAttribute);
return *static_cast<const SdpDtlsMessageAttribute*>(attr);
}
const SdpExtmapAttributeList& SipccSdpAttributeList::GetExtmap() const {
if (!HasAttribute(SdpAttribute::kExtmapAttribute)) {
MOZ_CRASH();
}
return *static_cast<const SdpExtmapAttributeList*>(
GetAttribute(SdpAttribute::kExtmapAttribute));
}
const SdpFingerprintAttributeList& SipccSdpAttributeList::GetFingerprint()
const {
if (!HasAttribute(SdpAttribute::kFingerprintAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kFingerprintAttribute);
return *static_cast<const SdpFingerprintAttributeList*>(attr);
}
const SdpFmtpAttributeList& SipccSdpAttributeList::GetFmtp() const {
if (!HasAttribute(SdpAttribute::kFmtpAttribute)) {
MOZ_CRASH();
}
return *static_cast<const SdpFmtpAttributeList*>(
GetAttribute(SdpAttribute::kFmtpAttribute));
}
const SdpGroupAttributeList& SipccSdpAttributeList::GetGroup() const {
if (!HasAttribute(SdpAttribute::kGroupAttribute)) {
MOZ_CRASH();
}
return *static_cast<const SdpGroupAttributeList*>(
GetAttribute(SdpAttribute::kGroupAttribute));
}
const SdpOptionsAttribute& SipccSdpAttributeList::GetIceOptions() const {
if (!HasAttribute(SdpAttribute::kIceOptionsAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kIceOptionsAttribute);
return *static_cast<const SdpOptionsAttribute*>(attr);
}
const std::string& SipccSdpAttributeList::GetIcePwd() const {
if (!HasAttribute(SdpAttribute::kIcePwdAttribute)) {
return kEmptyString;
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kIcePwdAttribute);
return static_cast<const SdpStringAttribute*>(attr)->mValue;
}
const std::string& SipccSdpAttributeList::GetIceUfrag() const {
if (!HasAttribute(SdpAttribute::kIceUfragAttribute)) {
return kEmptyString;
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kIceUfragAttribute);
return static_cast<const SdpStringAttribute*>(attr)->mValue;
}
const std::string& SipccSdpAttributeList::GetIdentity() const {
if (!HasAttribute(SdpAttribute::kIdentityAttribute)) {
return kEmptyString;
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kIdentityAttribute);
return static_cast<const SdpStringAttribute*>(attr)->mValue;
}
const SdpImageattrAttributeList& SipccSdpAttributeList::GetImageattr() const {
if (!HasAttribute(SdpAttribute::kImageattrAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kImageattrAttribute);
return *static_cast<const SdpImageattrAttributeList*>(attr);
}
const SdpSimulcastAttribute& SipccSdpAttributeList::GetSimulcast() const {
if (!HasAttribute(SdpAttribute::kSimulcastAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kSimulcastAttribute);
return *static_cast<const SdpSimulcastAttribute*>(attr);
}
const std::string& SipccSdpAttributeList::GetLabel() const {
if (!HasAttribute(SdpAttribute::kLabelAttribute)) {
return kEmptyString;
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kLabelAttribute);
return static_cast<const SdpStringAttribute*>(attr)->mValue;
}
uint32_t SipccSdpAttributeList::GetMaxptime() const {
if (!HasAttribute(SdpAttribute::kMaxptimeAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kMaxptimeAttribute);
return static_cast<const SdpNumberAttribute*>(attr)->mValue;
}
const std::string& SipccSdpAttributeList::GetMid() const {
if (!HasAttribute(SdpAttribute::kMidAttribute)) {
return kEmptyString;
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kMidAttribute);
return static_cast<const SdpStringAttribute*>(attr)->mValue;
}
const SdpMsidAttributeList& SipccSdpAttributeList::GetMsid() const {
if (!HasAttribute(SdpAttribute::kMsidAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kMsidAttribute);
return *static_cast<const SdpMsidAttributeList*>(attr);
}
const SdpMsidSemanticAttributeList& SipccSdpAttributeList::GetMsidSemantic()
const {
if (!HasAttribute(SdpAttribute::kMsidSemanticAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kMsidSemanticAttribute);
return *static_cast<const SdpMsidSemanticAttributeList*>(attr);
}
const SdpRidAttributeList& SipccSdpAttributeList::GetRid() const {
if (!HasAttribute(SdpAttribute::kRidAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kRidAttribute);
return *static_cast<const SdpRidAttributeList*>(attr);
}
uint32_t SipccSdpAttributeList::GetPtime() const {
if (!HasAttribute(SdpAttribute::kPtimeAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kPtimeAttribute);
return static_cast<const SdpNumberAttribute*>(attr)->mValue;
}
const SdpRtcpAttribute& SipccSdpAttributeList::GetRtcp() const {
if (!HasAttribute(SdpAttribute::kRtcpAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kRtcpAttribute);
return *static_cast<const SdpRtcpAttribute*>(attr);
}
const SdpRtcpFbAttributeList& SipccSdpAttributeList::GetRtcpFb() const {
if (!HasAttribute(SdpAttribute::kRtcpFbAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kRtcpFbAttribute);
return *static_cast<const SdpRtcpFbAttributeList*>(attr);
}
const SdpRemoteCandidatesAttribute& SipccSdpAttributeList::GetRemoteCandidates()
const {
MOZ_CRASH("Not yet implemented");
}
const SdpRtpmapAttributeList& SipccSdpAttributeList::GetRtpmap() const {
if (!HasAttribute(SdpAttribute::kRtpmapAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kRtpmapAttribute);
return *static_cast<const SdpRtpmapAttributeList*>(attr);
}
const SdpSctpmapAttributeList& SipccSdpAttributeList::GetSctpmap() const {
if (!HasAttribute(SdpAttribute::kSctpmapAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kSctpmapAttribute);
return *static_cast<const SdpSctpmapAttributeList*>(attr);
}
uint32_t SipccSdpAttributeList::GetSctpPort() const {
if (!HasAttribute(SdpAttribute::kSctpPortAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kSctpPortAttribute);
return static_cast<const SdpNumberAttribute*>(attr)->mValue;
}
uint32_t SipccSdpAttributeList::GetMaxMessageSize() const {
if (!HasAttribute(SdpAttribute::kMaxMessageSizeAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr =
GetAttribute(SdpAttribute::kMaxMessageSizeAttribute);
return static_cast<const SdpNumberAttribute*>(attr)->mValue;
}
const SdpSetupAttribute& SipccSdpAttributeList::GetSetup() const {
if (!HasAttribute(SdpAttribute::kSetupAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kSetupAttribute);
return *static_cast<const SdpSetupAttribute*>(attr);
}
const SdpSsrcAttributeList& SipccSdpAttributeList::GetSsrc() const {
if (!HasAttribute(SdpAttribute::kSsrcAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kSsrcAttribute);
return *static_cast<const SdpSsrcAttributeList*>(attr);
}
const SdpSsrcGroupAttributeList& SipccSdpAttributeList::GetSsrcGroup() const {
if (!HasAttribute(SdpAttribute::kSsrcGroupAttribute)) {
MOZ_CRASH();
}
const SdpAttribute* attr = GetAttribute(SdpAttribute::kSsrcGroupAttribute);
return *static_cast<const SdpSsrcGroupAttributeList*>(attr);
}
void SipccSdpAttributeList::Serialize(std::ostream& os) const {
for (size_t i = 0; i < kNumAttributeTypes; ++i) {
if (mAttributes[i]) {
os << *mAttributes[i];
}
}
}
} // namespace mozilla