public void GetStringIndexSIPInviteUnitTest()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
string sipMsg =
"INVITE sip:[email protected]:5060;TCID-0 SIP/2.0\r\n" +
"From: UNAVAILABLE<sip:[email protected]:5060>;tag=c0a83dfe-13c4-26bf01-975a21d0-2d8a\r\n" +
"To: <sip:[email protected]:5060>\r\n" +
"Call-ID: [email protected]\r\n" +
"CSeq: 1 INVITE\r\n" +
"Via: SIP/2.0/UDP 86.9.84.23:5060;branch=z9hG4bK-26bf01-975a21d0-1ffb\r\n" +
"Max-Forwards: 70\r\n" +
"User-Agent: TA612V-V1.2_54\r\n" +
"Supported: timer,replaces\r\n" +
"Contact: <sip:[email protected]:5060>\r\n" +
"Content-Type: application/SDP\r\n" +
"Content-Length: 386\r\n" +
"\r\n" +
"v=0\r\n" +
"o=b0000 613 888 IN IP4 88.8.88.88\r\n" +
"s=SIP Call\r\n" +
"c=IN IP4 88.8.88.88\r\n" +
"t=0 0\r\n" +
"m=audio 10000 RTP/AVP 0 101 18 100 101 2 103 8\r\n" +
"a=fmtp:101 0-15\r\n" +
"a=fmtp:18 annexb=no\r\n" +
"a=sendrecv\r\n" +
"a=rtpmap:0 PCMU/8000\r\n" +
"a=rtpmap:101 telephone-event/8000\r\n" +
"a=rtpmap:18 G729/8000\r\n" +
"a=rtpmap:100 G726-16/8000\r\n" +
"a=rtpmap:101 G726-24/8000\r\n" +
"a=rtpmap:2 G726-32/8000\r\n" +
"a=rtpmap:103 G726-40/8000\r\n" +
"a=rtpmap:8 PCMA/8000";
byte[] sample = Encoding.ASCII.GetBytes(sipMsg);
int endOfMsgIndex = ByteBufferInfo.GetStringPosition(sample, 0, Int32.MaxValue, "\r\n\r\n", null);
Assert.True(endOfMsgIndex == sipMsg.IndexOf("\r\n\r\n"), "The string position was not correctly found in the buffer. Index found was " + endOfMsgIndex + ", should have been " + sipMsg.IndexOf("\r\n\r\n") + ".");
}
/// <summary>
/// Processes a buffer from a TCP read operation to extract the first full SIP message. If no full SIP
/// messages are available it returns null which indicates the next read should be appended to the current
/// buffer and the process re-attempted.
/// </summary>
/// <param name="receiveBuffer">The buffer to check for the SIP message in.</param>
/// <param name="start">The position in the buffer to start parsing for a SIP message.</param>
/// <param name="length">The position in the buffer that indicates the end of the received bytes.</param>
/// <returns>A byte array holding a full SIP message or if no full SIP messages are available null.</returns>
public static byte[] ParseSIPMessageFromStream(byte[] receiveBuffer, int start, int length,
out int bytesSkipped)
{
// NAT keep-alives can be interspersed between SIP messages. Treat any non-letter character
// at the start of a receive as a non SIP transmission and skip over it.
bytesSkipped = 0;
bool letterCharFound = false;
while (!letterCharFound && start < length)
{
if ((int)receiveBuffer[start] >= 65)
{
break;
}
else
{
start++;
bytesSkipped++;
}
}
if (start < length)
{
int endMessageIndex =
ByteBufferInfo.GetStringPosition(receiveBuffer, start, length, m_sipMessageDelimiter, null);
if (endMessageIndex != -1)
{
int contentLength = GetContentLength(receiveBuffer, start, endMessageIndex);
int messageLength = endMessageIndex - start + m_sipMessageDelimiter.Length + contentLength;
if (length - start >= messageLength)
{
byte[] sipMsgBuffer = new byte[messageLength];
Buffer.BlockCopy(receiveBuffer, start, sipMsgBuffer, 0, messageLength);
return(sipMsgBuffer);
}
}
}
return(null);
}
public void GetStringIndexUnitTest()
{
Console.WriteLine(System.Reflection.MethodBase.GetCurrentMethod().Name);
string sipMsg =
"REGISTER sip:Blue Face SIP/2.0\r\n" +
"Via: SIP/2.0/UDP 127.0.0.1:1720;branch=z9hG4bKlgnUQcaywCOaPcXR\r\n" +
"Max-Forwards: 70\r\n" +
"User-Agent: PA168S\r\n" +
"From: \"user\" <sip:user@Blue Face>;tag=81swjAV7dHG1yjd5\r\n" +
"To: \"user\" <sip:user@Blue Face>\r\n" +
"Call-ID: [email protected]\r\n" +
"CSeq: 15754 REGISTER\r\n" +
"Contact: <sip:[email protected]:1720>\r\n" +
"Expires: 30\r\n" +
"Content-Length: 0\r\n\r\n";
byte[] sample = Encoding.ASCII.GetBytes(sipMsg);
int endOfMsgIndex = ByteBufferInfo.GetStringPosition(sample, 0, Int32.MaxValue, "\r\n\r\n", null);
Assert.True(endOfMsgIndex == sample.Length - 4, "The string position was not correctly found in the buffer.");
}
