internal SmtpCommand MakeRcpt(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
if (enumerator.Consume(1) != new Token(TokenKind.Text, "TO") || enumerator.Consume(1) != new Token(TokenKind.Punctuation, ":"))
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, "missing the TO:"));
}
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
MailAddress address;
return(!_parser.TryMakePath(enumerator, out address) ? MakeInvalid(SmtpReplyCode.SyntaxError, ""): new RcptCommand(address, _server.ValidateRecipient));
}
internal bool TryMakeAddressLiteral(TokenEnumerator enumerator, out string address)
{
address = null;
if (enumerator.Consume(1) != new Token(TokenKind.Punctuation, "["))
{
return(false);
}
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeIpv4AddressLiteral), out address))
{
return(false);
}
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
return(!(enumerator.Consume(1) != new Token(TokenKind.Punctuation, "]")) && address != null);
}
internal bool TryMakeMailbox(TokenEnumerator enumerator, out MailAddress mailbox)
{
mailbox = null;
string user;
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeLocalPart), out user))
{
return(false);
}
if (enumerator.Consume(1) != new Token(TokenKind.Punctuation, "@"))
{
return(false);
}
string host;
if (TryMake(enumerator, new TryMakeDelegate <string>(TryMakeDomain), out host))
{
mailbox = new MailAddress($"{user}@{host}");
return(true);
}
string host2;
if (TryMake(enumerator, new TryMakeDelegate <string>(TryMakeAddressLiteral), out host2))
{
mailbox = new MailAddress($"{user}@{host2}");
return(true);
}
return(false);
}
internal bool TryMakePath(TokenEnumerator enumerator, out MailAddress mailbox)
{
mailbox = null;
string text;
return(!(enumerator.Consume(1) != new Token(TokenKind.Symbol, "<")) && (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeAtDomainList), out text) || !(enumerator.Consume(1) != new Token(TokenKind.Punctuation, ":"))) && TryMake <MailAddress>(enumerator, new TryMakeDelegate <MailAddress>(TryMakeMailbox), out mailbox) && enumerator.Consume(1) == new Token(TokenKind.Symbol, ">"));
}
internal bool TryMakeTextOrNumber(TokenEnumerator enumerator, out string textOrNumber)
{
Token token = enumerator.Consume(1);
textOrNumber = token.Text;
return(token.Kind == TokenKind.Text || token.Kind == TokenKind.Number);
}
internal SmtpCommand MakeHelo(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
string domain;
return(!_parser.TryMakeDomain(enumerator, out domain)? MakeInvalid(SmtpReplyCode.SyntaxError, "") : new HeloCommand(domain));
}
internal bool TryMakeReversePath(TokenEnumerator enumerator, out MailAddress mailbox)
{
if (TryMake <MailAddress>(enumerator, new TryMakeDelegate <MailAddress>(TryMakePath), out mailbox))
{
return(true);
}
if (enumerator.Consume(1) != new Token(TokenKind.Symbol, "<"))
{
return(false);
}
if (enumerator.Consume(1) != new Token(TokenKind.Symbol, ">"))
{
return(false);
}
mailbox = null;
return(true);
}
internal SmtpCommand MakeStartTls(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
if (enumerator.Count > 1)
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, ""));
}
return(new StartTlsCommand(_server.ServerCertificate));
}
internal SmtpCommand MakeDbug(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
if (enumerator.Count > 1)
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, ""));
}
return(new DbugCommand());
}
internal SmtpCommand MakeAuth(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
AuthenticationMethod method;
if (!Enum.TryParse(enumerator.Peek(0).Text, true, out method))
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, ""));
}
enumerator.Consume(1);
string parameter = null;
if (enumerator.Count > 0 && !_parser.TryMakeBase64(enumerator, out parameter))
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, ""));
}
return(new AuthCommand(_server.UserAuthenticator, method, parameter));
}
internal bool TryMakeEsmtpKeyword(TokenEnumerator enumerator, out string keyword)
{
keyword = null;
Token left = enumerator.Peek(0);
while (left.Kind == TokenKind.Text || left.Kind == TokenKind.Number || left == new Token(TokenKind.Punctuation, "-"))
{
keyword += enumerator.Consume(1).Text;
left = enumerator.Peek(0);
}
return(keyword != null);
}
internal bool TryMakeTextOrNumberOrHyphenString(TokenEnumerator enumerator, out string textOrNumberOrHyphenString)
{
textOrNumberOrHyphenString = null;
Token left = enumerator.Peek(0);
while (left.Kind == TokenKind.Text || left.Kind == TokenKind.Number || left == new Token(TokenKind.Punctuation, "-"))
{
textOrNumberOrHyphenString += enumerator.Consume(1).Text;
left = enumerator.Peek(0);
}
return(textOrNumberOrHyphenString != null && left != new Token(TokenKind.Punctuation, "-"));
}
internal SmtpCommand MakeMail(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
if (enumerator.Consume(1) != new Token(TokenKind.Text, "FROM") || enumerator.Consume(1) != new Token(TokenKind.Punctuation, ":"))
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, "missing the FROM:"));
}
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
MailAddress address;
if (!_parser.TryMakeReversePath(enumerator, out address))
{
return(MakeInvalid(SmtpReplyCode.SyntaxError, ""));
}
IDictionary <string, string> parameters;
if (!_parser.TryMakeMailParameters(enumerator, out parameters))
{
parameters = new Dictionary <string, string>();
}
return(new MailCommand(address, parameters, _server.ValidateFrom, 0));
}
internal bool TryMakeEsmtpValue(TokenEnumerator enumerator, out string value)
{
value = null;
Token token = enumerator.Peek(0);
while (token.Text.Length > 0)
{
if (!token.Text.ToCharArray().All((char ch) => (ch >= '!' && ch <= 'B') || (ch >= '>' && ch <= '\u007f')))
{
break;
}
value += enumerator.Consume(1).Text;
token = enumerator.Peek(0);
}
return(value != null);
}
internal bool TryMakeAtDomain(TokenEnumerator enumerator, out string atDomain)
{
atDomain = null;
if (enumerator.Consume(1) != new Token(TokenKind.Punctuation, "@"))
{
return(false);
}
string arg;
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeDomain), out arg))
{
return(false);
}
atDomain = string.Format("@{0}", arg);
return(true);
}
internal bool TryMakeAtDomainList(TokenEnumerator enumerator, out string atDomainList)
{
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeAtDomain), out atDomainList))
{
return(false);
}
while (enumerator.Peek(0) == new Token(TokenKind.Punctuation, ","))
{
enumerator.Consume(1);
string arg;
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeAtDomain), out arg))
{
return(false);
}
atDomainList += string.Format(",{0}", arg);
}
return(true);
}
internal SmtpCommand MakeEhlo(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
string domainOrAddress;
if (_parser.TryMakeDomain(enumerator, out domainOrAddress))
{
return(new EhloCommand(domainOrAddress, _server));
}
string domainOrAddress2;
if (_parser.TryMakeAddressLiteral(enumerator, out domainOrAddress2))
{
return(new EhloCommand(domainOrAddress2, _server));
}
return(MakeInvalid(SmtpReplyCode.SyntaxError, ""));
}
internal bool TryMakeDotString(TokenEnumerator enumerator, out string dotString)
{
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeAtom), out dotString))
{
return(false);
}
while (enumerator.Peek(0) == new Token(TokenKind.Punctuation, "."))
{
enumerator.Consume(1);
string str;
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeAtom), out str))
{
return(true);
}
dotString += "." + str;
}
return(true);
}
internal bool TryMakeEsmtpParameter(TokenEnumerator enumerator, out KeyValuePair <string, string> parameter)
{
parameter = default(KeyValuePair <string, string>);
string key;
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeEsmtpKeyword), out key))
{
return(false);
}
if (enumerator.Consume(1) != new Token(TokenKind.Symbol, "="))
{
return(false);
}
string value;
if (!TryMake <string>(enumerator, new TryMakeDelegate <string>(TryMakeEsmtpValue), out value))
{
return(false);
}
parameter = new KeyValuePair <string, string>(key, value);
return(true);
}
private static bool TryMakeBase64Chars(TokenEnumerator enumerator, out string base64Chars)
{
base64Chars = null;
Token token = enumerator.Consume(1);
switch (token.Kind)
{
case TokenKind.Text:
case TokenKind.Number:
base64Chars = token.Text;
return(true);
case TokenKind.Symbol:
{
char c = token.Text[0];
if (c == '+')
{
base64Chars = token.Text;
return(true);
}
break;
}
case TokenKind.Punctuation:
{
char c2 = token.Text[0];
if (c2 == '/')
{
base64Chars = token.Text;
return(true);
}
break;
}
}
return(false);
}
internal bool TryMakeIpv4AddressLiteral(TokenEnumerator enumerator, out string address)
{
address = null;
int num;
if (!TryMake <int>(enumerator, new TryMakeDelegate <int>(TryMakeSnum), out num))
{
return(false);
}
address = num.ToString(CultureInfo.InvariantCulture);
int num2 = 0;
while (num2 < 3 && enumerator.Peek(0) == new Token(TokenKind.Punctuation, "."))
{
enumerator.Consume(1);
if (!TryMake <int>(enumerator, new TryMakeDelegate <int>(TryMakeSnum), out num))
{
return(false);
}
address = address + '.' + num;
num2++;
}
return(true);
}
internal SmtpCommand MakeRset(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
return(enumerator.Count > 1 ? MakeInvalid(SmtpReplyCode.SyntaxError, ""): new RsetCommand());
}
internal SmtpCommand MakeData(TokenEnumerator enumerator)
{
enumerator.Consume(1);
enumerator.ConsumeWhile((Token t) => t.Kind == TokenKind.Space);
return(enumerator.Count > 1 ? MakeInvalid(SmtpReplyCode.SyntaxError, ""): new DataCommand(_server.OnMessageArrived));
}
internal bool TryMakeSnum(TokenEnumerator enumerator, out int snum)
{
Token token = enumerator.Consume(1);
return(int.TryParse(token.Text, out snum) && token.Kind == TokenKind.Number && snum >= 0 && snum <= 255);
}
internal bool TryMakeAtext(TokenEnumerator enumerator, out string atext)
{
atext = null;
Token token = enumerator.Consume(1);
switch (token.Kind)
{
case TokenKind.Text:
case TokenKind.Number:
atext = token.Text;
return(true);
case TokenKind.Symbol:
{
char c = token.Text[0];
if (c <= '+')
{
if (c != '$' && c != '+')
{
break;
}
}
else
{
if (c != '=')
{
switch (c)
{
case '^':
case '`':
break;
case '_':
return(false);
default:
switch (c)
{
case '|':
case '~':
break;
case '}':
return(false);
default:
return(false);
}
break;
}
}
}
atext = token.Text;
return(true);
}
case TokenKind.Punctuation:
{
char c2 = token.Text[0];
if (c2 <= '?')
{
switch (c2)
{
case '!':
case '#':
case '%':
case '&':
case '\'':
case '*':
case '-':
case '/':
break;
case '"':
case '$':
case '(':
case ')':
case '+':
case ',':
case '.':
return(false);
default:
if (c2 != '?')
{
return(false);
}
break;
}
}
else
{
if (c2 != '_')
{
switch (c2)
{
case '{':
case '}':
break;
case '|':
return(false);
default:
return(false);
}
}
}
atext = token.Text;
return(true);
}
}
return(false);
}