added a function to decode and normalise the escaped characters (b2acabe5) · Commits · TTCN-3 Libraries / LibSip

codec/c++/sip_codets.cpp

+85 −6

Original line number	Diff line number	Diff line
		@@ -167,7 +167,65 @@ void normalise_quoted_string (Charstring& cs, bool remove_quotes = false) throw
		return;

		error_malformed:
		throw DecodeError (&cs, "Malformed quoted string");
		DecodeError e(&cs);
		e.Msg() << "Malformed quoted string: " << cs.GetValue() << endl;
		throw e;
		}

		void normalise_escaped_string (Charstring& cs) throw (DecodeError)
		{
		std::string result;

		const unsigned char* p = cs.GetValueBin();
		const unsigned char* end = p + (cs.GetLength() / 8);

		for ( ; p!=end ; p++)
		{
		unsigned char c;

		if (*p == '%') {
		// escaped char %xx

		if ((end - p) < 3)
		goto error_malformed;

		char buff[3] = { p[1], p[2], '\0'};
		p += 2;

		char* next;
		c = strtol(buff, &next, 16);

		if (next != &buff[2])
		goto error_malformed;
		//TODO: check that the result is UTF-8 valid ?
		} else {
		c = *p;
		}

		if (c<128)
		{
		// 7-bit character
		result += c;
		} else {
		// 8-bit character
		// -> escape it
		char buff[4];
		sprintf (buff, "%%%02x", c);
		result += buff;
		}
		}

		// replace the string with the quoted string
		{
		Bytestring& bs = cs;
		bs.SetValue (result);
		}
		return;

		error_malformed:
		DecodeError e(&cs);
		e.Msg() << "Malformed string: " << cs.GetValue() << endl;
		throw e;
		}

		//WSP: space, htab, vtab, form feed
		@@ -425,6 +483,14 @@ void UserInfo::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)
		}
		}

		void UserInfo::PostDecode (Buffer& buffer) throw (DecodeError)
		{
		if (IsPresent (id_userOrTelephoneSubscriber))
		normalise_escaped_string (Get_userOrTelephoneSubscriber());
		if (IsPresent (id_password))
		normalise_escaped_string (Get_password());
		}

		void HostPort::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)
		{
		static Regex reg_host ("^" SIPREG_HOST);
		@@ -594,6 +660,9 @@ void GenericParam::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)

		void GenericParam::PostDecode (Buffer& buffer) throw (DecodeError)
		{

		normalise_escaped_string (Get_id());

		if (IsPresent (id_paramValue))
		{
		Charstring& value = Get_paramValue();
		@@ -601,6 +670,8 @@ void GenericParam::PostDecode (Buffer& buffer) throw (DecodeError)
		if (value.GetLength() &&
		(*value.GetValueBin() == '"'))
		normalise_quoted_string (value, true);
		else
		normalise_escaped_string (value);
		}
		}

		@@ -738,6 +809,16 @@ void StatusLine::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)
		}
		}

		void StatusLine::PostDecode (Buffer& buffer) throw (DecodeError)
		{
		static Regex reg_crlf ("^\r\n");

		reg_crlf.AssertMatch(buffer, this);
		reg_crlf.MovePast(buffer);

		normalise_escaped_string (Get_reasonPhrase());
		}

		class SipHeaderMap {
		public:
		struct Entry {
		@@ -1895,12 +1976,10 @@ void UndefinedHeader::PreDecodeField (int id, Buffer& buffer) throw (DecodeError
		}
		}

		void StatusLine::PostDecode (Buffer& buffer) throw (DecodeError)
		void UndefinedHeader::PostDecode (Buffer& buffer) throw (DecodeError)
		{
		static Regex reg_crlf ("^\r\n");

		reg_crlf.AssertMatch(buffer, this);
		reg_crlf.MovePast(buffer);
		normalise_escaped_string (Get_headerName());
		normalise_escaped_string (Get_headerValue());
		}

		void CallId::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)