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SIP Stack with SIP Proxy - (VOIP)

, 11 Jun 2007
C# implementation of SIP
SIP_Proxy_demo.zip
SIP_Proxy_demo
SIP_Proxy_demo.suo
SIP_Proxy_demo
bin
Debug
LumiSoft.Net.dll
SIP_Proxy_demo.exe
SIP_Proxy_demo.vshost.exe
dep
LumiSoft.Net.dll
LumiSoft.Net.pdb
Properties
Settings.settings
Resources
add.ico
app.ico
delete.ico
edit.ico
error.ico
info.ico
refresh.ico
rule.ico
server_running.ico
server_stopped.ico
viewmessages.ico
Stack.zip
Net
docs
dns
dns_records.jpg
dns_records.vsd
Net
_junk
_Obsolete
AUTH
bin
Release
LumiSoft.Net.dll
Data
Dns
Client
FTP
Client
Server
HTTP
Server
ICMP
IMAP
Client
Server
IO
Log
LumiSoft.Net
Mime
vCard
Net.csproj.user
Net.suo
NNTP
Client
POP3
Client
Server
RTP
SDP
ServersCore
SIP
Client
Message
Proxy
Stack
SMTP
Client
Server
STUN
Client
Message
URI
using System;

namespace LumiSoft.Net.IMAP.Server
{
	/// <summary>
	/// Provides utility methods for IMAP.
	/// </summary>
	public class IMAP_Utils
	{
		#region method ParseMessageFlags

		/// <summary>
		/// Parses message flags from string.
		/// </summary>
		/// <param name="flagsString">Message flags string.</param>
		/// <returns></returns>
		public static IMAP_MessageFlags ParseMessageFlags(string flagsString)
		{
			IMAP_MessageFlags mFlags = 0;

			flagsString = flagsString.ToUpper();
			
			if(flagsString.IndexOf("ANSWERED") > -1){
				mFlags |= IMAP_MessageFlags.Answered;
			}
			if(flagsString.IndexOf("FLAGGED") > -1){
				mFlags |= IMAP_MessageFlags.Flagged;
			}
			if(flagsString.IndexOf("DELETED") > -1){
				mFlags |= IMAP_MessageFlags.Deleted;
			}
			if(flagsString.IndexOf("SEEN") > -1){
				mFlags |= IMAP_MessageFlags.Seen;
			}
			if(flagsString.IndexOf("DRAFT") > -1){
				mFlags |= IMAP_MessageFlags.Draft;
			}

			return mFlags;
		}

		#endregion

		#region method MessageFlagsToString

		/// <summary>
		/// Converts message flags to string. Eg. \SEEN \DELETED .
		/// </summary>
		/// <returns></returns>
		public static string MessageFlagsToString(IMAP_MessageFlags msgFlags)
		{
			string retVal = "";
			if(((int)IMAP_MessageFlags.Answered & (int)msgFlags) != 0){
				retVal += " \\ANSWERED";
			}
			if(((int)IMAP_MessageFlags.Flagged & (int)msgFlags) != 0){
				retVal += " \\FLAGGED";
			}
			if(((int)IMAP_MessageFlags.Deleted & (int)msgFlags) != 0){
				retVal += " \\DELETED";
			}
			if(((int)IMAP_MessageFlags.Seen & (int)msgFlags) != 0){
				retVal += " \\SEEN";
			}
			if(((int)IMAP_MessageFlags.Draft & (int)msgFlags) != 0){
				retVal += " \\DRAFT";
			}

			return retVal.Trim();
		}

		#endregion


		#region method ACL_to_String

		/// <summary>
		/// Converts IMAP_ACL_Flags to string.
		/// </summary>
		/// <param name="flags">Flags to convert.</param>
		/// <returns></returns>
		public static string ACL_to_String(IMAP_ACL_Flags flags)
		{
			string retVal = "";
			if((flags & IMAP_ACL_Flags.l) != 0){
				retVal += "l";
			}
			if((flags & IMAP_ACL_Flags.r) != 0){
				retVal += "r";
			}
			if((flags & IMAP_ACL_Flags.s) != 0){
				retVal += "s";
			}
			if((flags & IMAP_ACL_Flags.w) != 0){
				retVal += "w";
			}
			if((flags & IMAP_ACL_Flags.i) != 0){
				retVal += "i";
			}			
			if((flags & IMAP_ACL_Flags.p) != 0){
				retVal += "p";
			}
			if((flags & IMAP_ACL_Flags.c) != 0){
				retVal += "c";
			}
			if((flags & IMAP_ACL_Flags.d) != 0){
				retVal += "d";
			}
			if((flags & IMAP_ACL_Flags.a) != 0){
				retVal += "a";
			}

			return retVal;
		}

		#endregion

		#region method ACL_From_String

		/// <summary>
		/// Parses IMAP_ACL_Flags from string.
		/// </summary>
		/// <param name="aclString">String from where to convert</param>
		/// <returns></returns>
		public static IMAP_ACL_Flags ACL_From_String(string aclString)
		{
			IMAP_ACL_Flags retVal = IMAP_ACL_Flags.None;
			aclString = aclString.ToLower();
			if(aclString.IndexOf('l') > -1){
				retVal |= IMAP_ACL_Flags.l;
			}
			if(aclString.IndexOf('r') > -1){
				retVal |= IMAP_ACL_Flags.r;
			}
			if(aclString.IndexOf('s') > -1){
				retVal |= IMAP_ACL_Flags.s;
			}
			if(aclString.IndexOf('w') > -1){
				retVal |= IMAP_ACL_Flags.w;
			}
			if(aclString.IndexOf('i') > -1){
				retVal |= IMAP_ACL_Flags.i;
			}
			if(aclString.IndexOf('p') > -1){
				retVal |= IMAP_ACL_Flags.p;
			}
			if(aclString.IndexOf('c') > -1){
				retVal |= IMAP_ACL_Flags.c;
			}
			if(aclString.IndexOf('d') > -1){
				retVal |= IMAP_ACL_Flags.d;
			}
			if(aclString.IndexOf('a') > -1){
				retVal |= IMAP_ACL_Flags.a;
			}

			return retVal;
		}

		#endregion


		#region method ParseDate

		/// <summary>
		/// Parses IMAP date time from string.
		/// </summary>
		/// <param name="date">DateTime string.</param>
		/// <returns></returns>
		public static DateTime ParseDate(string date)
		{
            return LumiSoft.Net.Mime.MimeUtils.ParseDate(date);

            /*
			date = date.ToLower();

			//--- Replace month constants ---//
			date = date.Replace("jan","01");
			date = date.Replace("feb","02");
			date = date.Replace("mar","03");
			date = date.Replace("apr","04");
			date = date.Replace("may","05");
			date = date.Replace("jun","06");
			date = date.Replace("jul","07");
			date = date.Replace("aug","08");
			date = date.Replace("sep","09");
			date = date.Replace("oct","10");
			date = date.Replace("nov","11");
			date = date.Replace("dec","12");
			//-------------------------------//

			string[] dateFormats = new string[]{
				"dd-MM-yyyy HH':'mm':'ss zzz",
				"dd-MM-yyyy HH':'mm zzz",
				"dd-MM-yyyy HH':'mm':'ss",
				"dd-MM-yyyy"
			};
			return DateTime.ParseExact(date,dateFormats,System.Globalization.DateTimeFormatInfo.InvariantInfo,System.Globalization.DateTimeStyles.None);*/
		}

		#endregion

		#region static DateTimeToString

		/// <summary>
		/// Converts date time to IMAP date time string.
		/// </summary>
		/// <param name="date">DateTime to convert.</param>
		/// <returns></returns>
		public static string DateTimeToString(DateTime date)
		{			
			string retVal = "";
			retVal += date.ToString("dd-MMM-yyyy HH:mm:ss",System.Globalization.CultureInfo.InvariantCulture);
			retVal += " " + date.ToString("zzz",System.Globalization.CultureInfo.InvariantCulture).Replace(":","");

			return retVal;
		}

		#endregion


		#region method NormalizeFolder

		/// <summary>
		/// Normalizes folder path.  Example: /Inbox/SubFolder/ will be Inbox/SubFolder.
		/// </summary>
		/// <param name="folder">Folder path to normalize.</param>
		/// <returns>Returns normalized folder path.</returns>
		public static string NormalizeFolder(string folder)
		{
			folder = folder.Replace("\\","/");
			if(folder.StartsWith("/")){
				folder = folder.Substring(1);
			}
			if(folder.EndsWith("/")){
				folder = folder.Substring(0,folder.Length - 1);
			}

			return folder;
		}

		#endregion


		#region method ParseQuotedParam

		/// <summary>
		/// Parses [quoted] parameter from args text. Parameter may be not quoted, then parameter is
		/// terminated by SP. Example: argsText="string gdkga agkgs";argsText=stringValue 10.
		/// 
		/// This method also removes parsed parameter from argsText.
		/// </summary>
		/// <param name="argsText">Arguments line from where to parse param.</param>
		/// <returns></returns>
		public static string ParseQuotedParam(ref string argsText)
		{
			string paramValue = "";

			// Get value, it is between ""						
			if(argsText.StartsWith("\"")){
				// Find next " not escaped "
				char lastChar = ' ';
				int  qIndex   = -1;
				for(int i=1;i<argsText.Length;i++){
					if(argsText[i] == '\"' && lastChar != '\\'){
						qIndex = i;
						break;
					}
					lastChar = argsText[i];
				}

				if(qIndex == -1){
					throw new Exception("qouted-string doesn't have enclosing quote(\")");
				}
			
				paramValue = argsText.Substring(1,qIndex - 1).Replace("\\\"","\"");
						
				// Remove <string> value from argsText
				argsText = argsText.Substring(qIndex + 1).Trim();
			}
			else{
				paramValue = argsText.Split(' ')[0];

				// Remove <string> value from argsText
				argsText = argsText.Substring(paramValue.Length).Trim();
			}

			return paramValue;
		}

		#endregion

		#region method ParseBracketParam

		/// <summary>
		/// Parses bracket parameter from args text. Parameter may be not between (), then
		/// then args text is considered as value. Example: (test test);test test.
		/// 
		/// This method also removes parsed parameter from argsText.
		/// </summary>
		/// <param name="argsText"></param>
		/// <returns></returns>
		public static string ParseBracketParam(ref string argsText)
		{
			string paramValue = "";
			if(argsText.StartsWith("(")){
				// Find matching )
				char lastChar           = ' ';
				int  bIndex             = -1;
				int  nestedBracketCount = 0;
				for(int i=1;i<argsText.Length;i++){
					// There is nested ()
					if(argsText[i] == '('){
						nestedBracketCount++;
					}
					else if(argsText[i] == ')'){
						if(nestedBracketCount == 0){
							bIndex = i;
							break;
						}
						// This was nested bracket )
						else{
							nestedBracketCount--;
						}
					}
					lastChar = argsText[i];
				}

				if(bIndex == -1){
					throw new Exception("bracket doesn't have enclosing bracket ')'");
				}
			
				paramValue = argsText.Substring(1,bIndex - 1);
						
				// Remove <string> value from argsText
				argsText = argsText.Substring(bIndex + 1).Trim();
			}
			else{
				paramValue = argsText;

				argsText = "";
			}

			return paramValue;
		}

		#endregion
	}
}

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About the Author

Ivar Lumi

Estonia Estonia
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