Added earlier checks when setting SRTP policy from profile

src/impl/dtlssrtptransport.cpp

@@ -326,11 +326,13 @@ void DtlsSrtpTransport::postHandshake() {
 	std::memcpy(mServerSessionKey.data() + keySize, serverSalt, saltSize);
 
 	srtp_policy_t inbound = {};
-	srtp_crypto_policy_set_from_profile_for_rtp(&inbound.rtp, srtpProfile);
-	srtp_crypto_policy_set_from_profile_for_rtcp(&inbound.rtcp, srtpProfile);
+	if(srtp_crypto_policy_set_from_profile_for_rtp(&inbound.rtp, srtpProfile))
+		throw std::runtime_error("SRTP profile is not supported");
+	if(srtp_crypto_policy_set_from_profile_for_rtcp(&inbound.rtcp, srtpProfile))
+		throw std::runtime_error("SRTP profile is not supported");
+
 	inbound.ssrc.type = ssrc_any_inbound;
 	inbound.key = mIsClient ? mServerSessionKey.data() : mClientSessionKey.data();
-
 	inbound.window_size = 1024;
 	inbound.allow_repeat_tx = true;
 	inbound.next = nullptr;
@@ -340,8 +342,11 @@ void DtlsSrtpTransport::postHandshake() {
 		                         to_string(static_cast<int>(err)));
 
 	srtp_policy_t outbound = {};
-	srtp_crypto_policy_set_from_profile_for_rtp(&outbound.rtp, srtpProfile);
-	srtp_crypto_policy_set_from_profile_for_rtcp(&outbound.rtcp, srtpProfile);
+	if(srtp_crypto_policy_set_from_profile_for_rtp(&outbound.rtp, srtpProfile))
+		throw std::runtime_error("SRTP profile is not supported");
+	if(srtp_crypto_policy_set_from_profile_for_rtcp(&outbound.rtcp, srtpProfile))
+		throw std::runtime_error("SRTP profile is not supported");
+
 	outbound.ssrc.type = ssrc_any_outbound;
 	outbound.key = mIsClient ? mClientSessionKey.data() : mServerSessionKey.data();
 	outbound.window_size = 1024;