mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-25 12:11:36 +08:00
重写webrtc sdp校验逻辑,确保无有效track时抛异常:#1157
This commit is contained in:
ziyue
parent
b10fc52384
commit
9433a0c383
165
webrtc/Sdp.cpp
165
webrtc/Sdp.cpp
@ -291,12 +291,10 @@ string RtcSessionSdp::toString() const {
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//////////////////////////////////////////////////////////////////////////////////////////
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#define SDP_THROW() throw std::invalid_argument(StrPrinter << "解析sdp " << getKey() << " 字段失败:" << str)
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#define CHECK_SDP(exp) CHECK(exp, "解析sdp ", getKey(), " 字段失败:", str)
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void SdpTime::parse(const string &str) {
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if (sscanf(str.data(), "%" SCNu64 " %" SCNu64, &start, &stop) != 2) {
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SDP_THROW();
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}
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CHECK_SDP(sscanf(str.data(), "%" SCNu64 " %" SCNu64, &start, &stop) == 2);
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}
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string SdpTime::toString() const {
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@ -308,9 +306,7 @@ string SdpTime::toString() const {
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void SdpOrigin::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 6) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() == 6);
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username = vec[0];
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session_id = vec[1];
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session_version = vec[2];
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@ -328,9 +324,7 @@ string SdpOrigin::toString() const {
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void SdpConnection::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 3) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() == 3);
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nettype = vec[0];
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addrtype = vec[1];
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address = vec[2];
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@ -345,9 +339,7 @@ string SdpConnection::toString() const {
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void SdpBandwidth::parse(const string &str) {
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auto vec = split(str, ":");
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if (vec.size() != 2) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() == 2);
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bwtype = vec[0];
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bandwidth = atoi(vec[1].data());
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}
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@ -361,20 +353,14 @@ string SdpBandwidth::toString() const {
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void SdpMedia::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() < 4) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() >= 4);
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type = getTrackType(vec[0]);
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if (type == TrackInvalid) {
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SDP_THROW();
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}
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CHECK_SDP(type != TrackInvalid);
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port = atoi(vec[1].data());
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proto = vec[2];
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for (size_t i = 3; i < vec.size(); ++i) {
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auto pt = atoi(vec[i].data());
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if (type != TrackApplication && pt > 0xFF) {
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SDP_THROW();
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}
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CHECK_SDP(type == TrackApplication || pt <= 0xFF);
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fmts.emplace_back(pt);
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}
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}
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@ -417,9 +403,7 @@ string SdpAttr::toString() const {
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void SdpAttrGroup::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() < 2) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() >= 2);
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type = vec[0];
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vec.erase(vec.begin());
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mids = std::move(vec);
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@ -438,9 +422,7 @@ string SdpAttrGroup::toString() const {
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void SdpAttrMsidSemantic::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() < 1) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() >= 1);
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msid = vec[0];
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token = vec.size() > 1 ? vec[1] : "";
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}
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@ -458,9 +440,7 @@ string SdpAttrMsidSemantic::toString() const {
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void SdpAttrRtcp::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 4) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() == 4);
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port = atoi(vec[0].data());
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nettype = vec[1];
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addrtype = vec[2];
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@ -503,9 +483,7 @@ string SdpAttrIceOption::toString() const{
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void SdpAttrFingerprint::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() != 2) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() == 2);
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algorithm = vec[0];
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hash = vec[1];
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}
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@ -519,9 +497,7 @@ string SdpAttrFingerprint::toString() const {
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void SdpAttrSetup::parse(const string &str) {
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role = getDtlsRole(str);
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if (role == DtlsRole::invalid) {
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SDP_THROW();
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}
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CHECK_SDP(role != DtlsRole::invalid);
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}
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string SdpAttrSetup::toString() const {
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@ -535,9 +511,7 @@ void SdpAttrExtmap::parse(const string &str) {
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char buf[128] = {0};
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char direction_buf[32] = {0};
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if (sscanf(str.data(), "%" SCNd8 "/%31[^ ] %127s", &id, direction_buf, buf) != 3) {
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if (sscanf(str.data(), "%" SCNd8 " %127s", &id, buf) != 2) {
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SDP_THROW();
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}
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CHECK_SDP(sscanf(str.data(), "%" SCNd8 " %127s", &id, buf) == 2);
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direction = RtpDirection::sendrecv;
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} else {
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direction = getRtpDirection(direction_buf);
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@ -559,9 +533,7 @@ string SdpAttrExtmap::toString() const {
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void SdpAttrRtpMap::parse(const string &str) {
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char buf[32] = {0};
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if (sscanf(str.data(), "%" SCNu8 " %31[^/]/%" SCNd32 "/%" SCNd32, &pt, buf, &sample_rate, &channel) != 4) {
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if (sscanf(str.data(), "%" SCNu8 " %31[^/]/%" SCNd32, &pt, buf, &sample_rate) != 3) {
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SDP_THROW();
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}
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CHECK_SDP(sscanf(str.data(), "%" SCNu8 " %31[^/]/%" SCNd32, &pt, buf, &sample_rate) == 3);
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if (getTrackType(getCodecId(buf)) == TrackAudio) {
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//未指定通道数时，且为音频时，那么通道数默认为1
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channel = 1;
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@ -584,9 +556,7 @@ string SdpAttrRtpMap::toString() const {
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void SdpAttrRtcpFb::parse(const string &str_in) {
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auto str = str_in + "\n";
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char rtcp_type_buf[32] = {0};
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if (2 != sscanf(str.data(), "%" SCNu8 " %31[^\n]", &pt, rtcp_type_buf)) {
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SDP_THROW();
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}
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CHECK_SDP(sscanf(str.data(), "%" SCNu8 " %31[^\n]", &pt, rtcp_type_buf) == 2);
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rtcp_type = rtcp_type_buf;
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}
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@ -599,9 +569,7 @@ string SdpAttrRtcpFb::toString() const {
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void SdpAttrFmtp::parse(const string &str) {
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auto pos = str.find(' ');
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if (pos == string::npos) {
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SDP_THROW();
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}
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CHECK_SDP(pos != string::npos);
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pt = atoi(str.substr(0, pos).data());
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auto vec = split(str.substr(pos + 1), ";");
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for (auto &item : vec) {
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@ -613,9 +581,7 @@ void SdpAttrFmtp::parse(const string &str) {
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fmtp.emplace(std::make_pair(item.substr(0, pos), item.substr(pos + 1)));
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}
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}
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if (fmtp.empty()) {
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SDP_THROW();
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}
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CHECK_SDP(!fmtp.empty());
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}
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string SdpAttrFmtp::toString() const {
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@ -640,7 +606,7 @@ void SdpAttrSSRC::parse(const string &str_in) {
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} else if (2 == sscanf(str.data(), "%" SCNu32 " %31s[^\n]", &ssrc, attr_buf)) {
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attribute = attr_buf;
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} else {
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SDP_THROW();
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CHECK_SDP(0);
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}
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}
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@ -658,15 +624,12 @@ string SdpAttrSSRC::toString() const {
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void SdpAttrSSRCGroup::parse(const string &str) {
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auto vec = split(str, " ");
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if (vec.size() >= 3) {
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CHECK_SDP(vec.size() >= 3);
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type = std::move(vec[0]);
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CHECK(isFID() || isSIM());
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vec.erase(vec.begin());
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for (auto ssrc : vec) {
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ssrcs.emplace_back((uint32_t)atoll(ssrc.data()));
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}
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} else {
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SDP_THROW();
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ssrcs.emplace_back((uint32_t) atoll(ssrc.data()));
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}
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}
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@ -685,11 +648,8 @@ string SdpAttrSSRCGroup::toString() const {
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void SdpAttrSctpMap::parse(const string &str) {
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char subtypes_buf[64] = {0};
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if (3 == sscanf(str.data(), "%" SCNu16 " %63[^ ] %" SCNd32, &port, subtypes_buf, &streams)) {
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CHECK_SDP(3 == sscanf(str.data(), "%" SCNu16 " %63[^ ] %" SCNd32, &port, subtypes_buf, &streams));
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subtypes = subtypes_buf;
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} else {
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SDP_THROW();
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}
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}
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string SdpAttrSctpMap::toString() const {
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@ -710,10 +670,8 @@ void SdpAttrCandidate::parse(const string &str) {
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char type_buf[16] = {0};
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// https://datatracker.ietf.org/doc/html/rfc5245#section-15.1
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if (7 != sscanf(str.data(), "%32[^ ] %" SCNu32 " %15[^ ] %" SCNu32 " %31[^ ] %" SCNu16 " typ %15[^ ]",
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foundation_buf, &component, transport_buf, &priority, address_buf, &port, type_buf)) {
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SDP_THROW();
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}
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CHECK_SDP(sscanf(str.data(), "%32[^ ] %" SCNu32 " %15[^ ] %" SCNu32 " %31[^ ] %" SCNu16 " typ %15[^ ]",
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foundation_buf, &component, transport_buf, &priority, address_buf, &port, type_buf) == 7);
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foundation = foundation_buf;
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transport = transport_buf;
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address = address_buf;
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@ -757,9 +715,7 @@ void SdpAttrSimulcast::parse(const string &str) {
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//a=simulcast: recv h;m;l
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//
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auto vec = split(str, " ");
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if (vec.size() != 2) {
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SDP_THROW();
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}
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CHECK_SDP(vec.size() == 2);
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direction = vec[0];
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rids = split(vec[1], ";");
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}
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@ -794,7 +750,7 @@ string SdpAttrRid::toString() const {
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return SdpItem::toString();
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}
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void RtcSession::loadFrom(const string &str, bool check) {
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void RtcSession::loadFrom(const string &str) {
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RtcSessionSdp sdp;
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sdp.parse(str);
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@ -808,12 +764,6 @@ void RtcSession::loadFrom(const string &str, bool check) {
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msid_semantic = sdp.getItemClass<SdpAttrMsidSemantic>('a', "msid-semantic");
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for (auto &media : sdp.medias) {
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auto mline = media.getItemClass<SdpMedia>('m');
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switch (mline.type) {
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case TrackVideo:
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case TrackAudio:
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case TrackApplication: break;
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default: throw std::invalid_argument(StrPrinter << "不识别的media类型:" << mline.toString());
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}
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this->media.emplace_back();
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auto &rtc_media = this->media.back();
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rtc_media.type = mline.type;
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@ -949,19 +899,15 @@ void RtcSession::loadFrom(const string &str, bool check) {
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map<uint8_t, SdpAttrFmtp &> fmtp_map;
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for (auto &rtpmap : rtpmap_arr) {
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if (!rtpmap_map.emplace(rtpmap.pt, rtpmap).second) {
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//添加失败，有多条
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throw std::invalid_argument(StrPrinter << "该pt存在多条a=rtpmap:" << rtpmap.pt);
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}
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CHECK(rtpmap_map.emplace(rtpmap.pt, rtpmap).second, "该pt存在多条a=rtpmap:", (int)rtpmap.pt);
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}
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for (auto &rtpfb : rtcpfb_arr) {
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rtcpfb_map.emplace(rtpfb.pt, rtpfb);
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}
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for (auto &fmtp : fmtp_aar) {
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if (!fmtp_map.emplace(fmtp.pt, fmtp).second) {
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//添加失败，有多条
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throw std::invalid_argument(StrPrinter << "该pt存在多条a=fmtp:" << fmtp.pt);
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}
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CHECK(fmtp_map.emplace(fmtp.pt, fmtp).second, "该pt存在多条a=fmtp:", (int)fmtp.pt);
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}
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for (auto &pt : mline.fmts) {
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//遍历所有编码方案的pt
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@ -992,9 +938,6 @@ void RtcSession::loadFrom(const string &str, bool check) {
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}
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group = sdp.getItemClass<SdpAttrGroup>('a', "group");
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if (check) {
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checkValid();
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}
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}
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std::shared_ptr<SdpItem> wrapSdpAttr(SdpItem::Ptr item){
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@ -1042,7 +985,6 @@ static void toRtsp(vector <SdpItem::Ptr> &items) {
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}
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string RtcSession::toRtspSdp() const{
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checkValid();
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RtcSession copy = *this;
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copy.media.clear();
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for (auto &m : media) {
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@ -1269,7 +1211,6 @@ RtcSessionSdp::Ptr RtcSession::toRtcSessionSdp() const{
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}
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string RtcSession::toString() const{
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checkValid();
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return toRtcSessionSdp()->toString();
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}
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@ -1341,10 +1282,9 @@ void RtcMedia::checkValid() const{
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CHECK(!mid.empty());
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CHECK(!proto.empty());
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CHECK(direction != RtpDirection::invalid || type == TrackApplication);
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CHECK(!plan.empty() || type == TrackApplication );
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}
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CHECK(!plan.empty() || type == TrackApplication);
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CHECK(type == TrackApplication || rtcp_mux, "只支持rtcp-mux模式");
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void RtcMedia::checkValidSSRC() const {
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bool send_rtp = (direction == RtpDirection::sendonly || direction == RtpDirection::sendrecv);
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if (rtp_rids.empty() && rtp_ssrc_sim.empty()) {
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//非simulcast时，检查有没有指定rtp ssrc
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@ -1367,16 +1307,19 @@ void RtcSession::checkValid() const{
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CHECK(!session_name.empty());
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CHECK(!msid_semantic.empty());
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CHECK(!media.empty());
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CHECK(group.mids.size() <= media.size());
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CHECK(!group.mids.empty() && group.mids.size() <= media.size(), "只支持group BUNDLE模式");
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bool have_active_media = false;
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for (auto &item : media) {
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item.checkValid();
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switch (item.direction) {
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case RtpDirection::sendrecv:
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case RtpDirection::sendonly:
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case RtpDirection::recvonly: have_active_media = true; break;
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default : break;
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}
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}
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void RtcSession::checkValidSSRC() const{
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for (auto &item : media) {
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item.checkValidSSRC();
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}
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CHECK(have_active_media, "必须确保最少有一个活跃的track");
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}
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const RtcMedia *RtcSession::getMedia(TrackType type) const{
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@ -1388,15 +1331,6 @@ const RtcMedia *RtcSession::getMedia(TrackType type) const{
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return nullptr;
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}
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bool RtcSession::haveSSRC() const {
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for (auto &m : media) {
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if (!m.rtp_rtx_ssrc.empty()) {
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return true;
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}
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}
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return false;
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}
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bool RtcSession::supportRtcpFb(const string &name, TrackType type) const {
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auto media = getMedia(type);
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if (!media) {
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@ -1415,17 +1349,6 @@ bool RtcSession::supportSimulcast() const {
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return false;
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}
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void RtcSession::checkSdp() const {
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for (auto &m : media) {
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if (m.type != TrackApplication && !m.rtcp_mux) {
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throw std::invalid_argument("只支持rtcp-mux模式");
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}
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}
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if (group.mids.empty()) {
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throw std::invalid_argument("只支持group BUNDLE模式");
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}
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}
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string const SdpConst::kTWCCRtcpFb = "transport-cc";
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string const SdpConst::kRembRtcpFb = "goog-remb";
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@ -1596,17 +1519,12 @@ void RtcConfigure::enableREMB(bool enable, TrackType type){
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shared_ptr<RtcSession> RtcConfigure::createAnswer(const RtcSession &offer){
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shared_ptr<RtcSession> ret = std::make_shared<RtcSession>();
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ret->version = offer.version;
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//todo 此处设置会话id与会话地址，貌似没什么作用
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ret->origin = offer.origin;
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ret->session_name = offer.session_name;
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ret->msid_semantic = offer.msid_semantic;
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matchMedia(ret, TrackAudio, offer.media, audio);
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matchMedia(ret, TrackVideo, offer.media, video);
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matchMedia(ret, TrackApplication, offer.media, application);
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if (ret->media.empty()) {
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throw std::invalid_argument("生成的answer sdp中媒体个数为0");
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}
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//设置音视频端口复用
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if (!offer.group.mids.empty()) {
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for (auto &m : ret->media) {
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@ -1678,11 +1596,8 @@ RETRY:
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answer_media.type = offer_media.type;
|
||||
answer_media.mid = offer_media.mid;
|
||||
answer_media.proto = offer_media.proto;
|
||||
//todo(此处设置rtp端口，貌似没什么作用)
|
||||
answer_media.port = offer_media.port;
|
||||
//todo(此处设置rtp的ip地址，貌似没什么作用)
|
||||
answer_media.addr = offer_media.addr;
|
||||
//todo(此处设置rtcp地址，貌似没什么作用)
|
||||
answer_media.rtcp_addr = offer_media.rtcp_addr;
|
||||
answer_media.rtcp_mux = offer_media.rtcp_mux && configure.rtcp_mux;
|
||||
answer_media.rtcp_rsize = offer_media.rtcp_rsize && configure.rtcp_rsize;
|
||||
@ -1804,7 +1719,7 @@ RETRY:
|
||||
|
||||
void RtcConfigure::setPlayRtspInfo(const string &sdp){
|
||||
RtcSession session;
|
||||
session.loadFrom(sdp, false);
|
||||
session.loadFrom(sdp);
|
||||
for (auto &m : session.media) {
|
||||
switch (m.type) {
|
||||
case TrackVideo : {
|
||||
|
||||
10
webrtc/Sdp.h
10
webrtc/Sdp.h
@ -641,8 +641,6 @@ public:
|
||||
uint32_t sctp_port{0};
|
||||
|
||||
void checkValid() const;
|
||||
//offer sdp,如果指定了发送rtp,那么应该指定ssrc
|
||||
void checkValidSSRC() const;
|
||||
const RtcCodecPlan *getPlan(uint8_t pt) const;
|
||||
const RtcCodecPlan *getPlan(const char *codec) const;
|
||||
const RtcCodecPlan *getRelatedRtxPlan(uint8_t pt) const;
|
||||
@ -651,7 +649,7 @@ public:
|
||||
bool supportSimulcast() const;
|
||||
};
|
||||
|
||||
class RtcSession{
|
||||
class RtcSession {
|
||||
public:
|
||||
using Ptr = std::shared_ptr<RtcSession>;
|
||||
|
||||
@ -666,15 +664,11 @@ public:
|
||||
vector<RtcMedia> media;
|
||||
SdpAttrGroup group;
|
||||
|
||||
void loadFrom(const string &sdp, bool check = true);
|
||||
void loadFrom(const string &sdp);
|
||||
void checkValid() const;
|
||||
void checkSdp() const;
|
||||
//offer sdp,如果指定了发送rtp,那么应该指定ssrc
|
||||
void checkValidSSRC() const;
|
||||
string toString() const;
|
||||
string toRtspSdp() const;
|
||||
const RtcMedia *getMedia(TrackType type) const;
|
||||
bool haveSSRC() const;
|
||||
bool supportRtcpFb(const string &name, TrackType type = TrackType::TrackVideo) const;
|
||||
bool supportSimulcast() const;
|
||||
|
||||
|
||||
@ -187,6 +187,7 @@ std::string WebRtcTransport::getAnswerSdp(const string &offer){
|
||||
_offer_sdp = std::make_shared<RtcSession>();
|
||||
_offer_sdp->loadFrom(offer);
|
||||
onCheckSdp(SdpType::offer, *_offer_sdp);
|
||||
_offer_sdp->checkValid();
|
||||
setRemoteDtlsFingerprint(*_offer_sdp);
|
||||
|
||||
//// sdp 配置 ////
|
||||
@ -201,6 +202,7 @@ std::string WebRtcTransport::getAnswerSdp(const string &offer){
|
||||
//// 生成answer sdp ////
|
||||
_answer_sdp = configure.createAnswer(*_offer_sdp);
|
||||
onCheckSdp(SdpType::answer, *_answer_sdp);
|
||||
_answer_sdp->checkValid();
|
||||
return _answer_sdp->toString();
|
||||
} catch (exception &ex) {
|
||||
onShutdown(SockException(Err_shutdown, ex.what()));
|
||||
@ -457,10 +459,9 @@ void WebRtcTransportImp::onCheckAnswer(RtcSession &sdp) {
|
||||
}
|
||||
|
||||
void WebRtcTransportImp::onCheckSdp(SdpType type, RtcSession &sdp) {
|
||||
sdp.checkSdp();
|
||||
switch (type) {
|
||||
case SdpType::answer: onCheckAnswer(sdp); break;
|
||||
case SdpType::offer: sdp.checkValidSSRC(); break;
|
||||
case SdpType::offer: break;
|
||||
default: /*不可达*/ assert(0); break;
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user