SipUrl - basic decoding methods (c0b9caac) · Commits · TTCN-3 Libraries / LibSip

codec/c++/sip_codets.cpp

+83 −9

Original line number	Diff line number	Diff line
		@@ -9,6 +9,7 @@ class Regex {
		public:
		Regex(const char* regex, int flags = 0) {

		flags \|= REG_EXTENDED;
		if (regcomp (&mRegex, regex, flags))
		{
		std::cerr << "bad regex: " << regex << endl;
		@@ -18,9 +19,9 @@ public:

		bool Match (Buffer& buffer) {

		const char* start = buffer.GetValue().c_str() + (buffer.GetPosition() / 8);
		mStart = buffer.GetValue().c_str() + (buffer.GetPosition() / 8);

		return !regexec (&mRegex, start, 16, mMatches, 0);
		return !regexec (&mRegex, mStart, 16, mMatches, 0);
		}

		void AssertMatch (Buffer& buffer, Variable* v) throw (DecodeError) {
		@@ -29,8 +30,20 @@ public:
		}
		}

		int GetMatchedLength() {
		return (mMatches[0].rm_eo - mMatches[0].rm_so)*8;
		int GetMatchedLength(int id = 0) {
		return (mMatches[id].rm_eo - mMatches[id].rm_so)*8;
		}

		std::string GetMatchedString(int id = 0) {
		return std::string (mStart + mMatches[id].rm_so, mMatches[id].rm_eo - mMatches[id].rm_so);
		}

		const char* GetMatchedPosition(int id = 0) {
		return mStart + mMatches[id].rm_so;
		}

		const char GetLastMatchedChar(int id = 0) {
		return *(mStart + mMatches[id].rm_eo);
		}

		void Error (Variable* v, Buffer& buffer) throw (DecodeError) {
		@@ -45,23 +58,32 @@ public:
		private:
		regex_t mRegex;
		regmatch_t mMatches[16];
		const char* mStart;
		};

		#define SIPCHARS_MARK "\\-_.!~*'()"
		#define SIPCHARS_UNRESERVED "A-Za-z0-9" SIPCHARS_MARK
		#define SIPCHARS_ALFA "A-Za-z"
		#define SIPCHARS_ALFANUM "0-9" SIPCHARS_ALFA
		#define SIPCHARS_UNRESERVED SIPCHARS_ALFANUM SIPCHARS_MARK
		#define SIPCHARS_USER_UNRESERVED "&=+$,;?/"
		#define SIPCHARS_ESCAPED "%0-9"
		#define SIPCHARS_ESCAPED "(%[0-9A-F]{2})"
		#define SIPCHARS_TOPLABEL "[" SIPCHARS_ALFA "]([" SIPCHARS_ALFANUM "\\-]*[" SIPCHARS_ALFANUM "])?"
		#define SIPCHARS_DOMAINLABEL "[" SIPCHARS_ALFANUM "]([" SIPCHARS_ALFANUM "\\-]*[" SIPCHARS_ALFANUM "])?"
		#define SIPCHARS_HOSTNAME "(" SIPCHARS_DOMAINLABEL "\\.)*" SIPCHARS_TOPLABEL "\\.?"
		//#define SIPCHARS_HOSTNAME SIPCHARS_TOPLABEL

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

		static Regex reg_scheme ("^sip:", REG_ICASE);
		static Regex reg_userinfo ("^[:" SIPCHARS_UNRESERVED SIPCHARS_USER_UNRESERVED SIPCHARS_ESCAPED "]*@", REG_ICASE);
		//static Regex reg_userinfo ("^([" SIPCHARS_USER_UNRESERVED SIPCHARS_UNRESERVED ":])*@", REG_ICASE);
		static Regex reg_userinfo ("^([:" SIPCHARS_UNRESERVED SIPCHARS_USER_UNRESERVED "]\|" SIPCHARS_ESCAPED "])*@", REG_ICASE);
		static Regex reg_hostport ("^[:." SIPCHARS_ALFANUM "\\-]*([;&]\|$)", REG_ICASE);

		switch (id) {
		case id_scheme:
		reg_scheme.AssertMatch (buffer, this);
		SetHypFieldLength (id_scheme, reg_scheme.GetMatchedLength());
		SetHypFieldLength (id, reg_scheme.GetMatchedLength());
		break;

		case id_userInfo:
		@@ -77,11 +99,63 @@ void SipUrl::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)
		if (IsPresent (id_userInfo)) {
		Unsigned(8).Decode(buffer);
		}

		if (reg_hostport.Match (buffer)) {
		SetHypFieldIsPresent (id, 1);
		char c = reg_hostport.GetLastMatchedChar();
		SetHypFieldLength(id, reg_hostport.GetMatchedLength() - (c == ';' \|\| c == '&' ? 8 : 0));
		} else if (IsPresent (id_userInfo)) {
		reg_hostport.Error(this, buffer);
		} else {
		SetHypFieldIsPresent (id, 0);
		}
		break;
		}
		}

		void UserInfo::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)
		{
		static Regex reg_username ("^([" SIPCHARS_UNRESERVED SIPCHARS_USER_UNRESERVED "]\|" SIPCHARS_ESCAPED ")*:", REG_ICASE);
		static Regex reg_password ("^([&=+$," SIPCHARS_UNRESERVED "]\|" SIPCHARS_ESCAPED ")*", REG_ICASE);
		switch (id) {
		case id_userOrTelephoneSubscriber:
		if (reg_username.Match (buffer)) {
		SetHypFieldLength (id, reg_username.GetMatchedLength() - 8);
		}
		break;
		case id_password:
		if(buffer.GetBitsLeft()) {
		Unsigned(8).Decode(buffer);
		SetHypFieldIsPresent (id, 1);
		reg_password.AssertMatch (buffer, this);
		} else {
		SetHypFieldIsPresent (id, 0);
		}
		break;
		}
		}

		void HostPort::PreDecodeField (int id, Buffer& buffer) throw (DecodeError)
		{
		static Regex reg_host1 (SIPCHARS_HOSTNAME "$", REG_ICASE);
		static Regex reg_host2 (SIPCHARS_HOSTNAME ":", REG_ICASE);
		switch (id) {
		case id_host:
		SetHypFieldIsPresent(id, 1);
		if (reg_host2.Match(buffer)){
		SetHypFieldLength(id, reg_host2.GetMatchedLength() - 8);
		} else {
		reg_host1.AssertMatch(buffer, this);
		}
		break;
		case id_portField:
		if(buffer.GetBitsLeft()) {
		Unsigned(8).Decode(buffer);
		SetHypFieldIsPresent (id, 1);
		} else {
		SetHypFieldIsPresent (id, 0);
		}
		break;
		}
		}

		}} // namespaces