Revert "add source code"

This reverts commit 4b0f20eed87e8b1542f991e06f4868b05f36dd64.

Reason for revert: <INSERT REASONING HERE>

Change-Id: I81a3d178c661bbc4e6fd9b0d6063a12bbfc0817c
Signed-off-by: Junfeng Wang <drenfong.wang@intel.com>

1 files changed, 0 insertions, 247 deletions

diff --git a/src/protocols/dpi_ssl.c b/src/protocols/dpi_ssl.c
deleted file mode 100644
index f15a19c..0000000
--- a/src/protocols/dpi_ssl.c
+++ /dev/null
@@ -1,247 +0,0 @@
-/*
- * Copyright (c) 2019 Intel and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <stdint.h>
-#include <string.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-#include <inttypes.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-
-#include "../dpi.h"
-
-typedef enum
-{
-  State_Initial = 0,
-  State_Client_Hello = 1,
-  State_Server_Hello = 2,
-  State_Certificate = 3,
-} ssl_state;
-
-enum
-{
-  MAJOR_TLS = 0x3,
-};
-
-enum
-{
-  MINOR_SSL30 = 0,
-  MINOR_TLS10 = 0x1,
-  MINOR_TLS11 = 0x2,
-  MINOR_TLS12 = 0x3,
-};
-
-typedef enum
-{
-  change_cipher_spec = 20,
-  alert = 21,
-  handshake = 22,
-  application_data = 23,
-} ContentType;
-
-typedef struct
-{
-  u8 major;
-  u8 minor;
-} ProtocolVersion;
-
-typedef struct
-{
-  u8 type;
-  ProtocolVersion version;
-  u16 length;
-} __attribute__ ((packed)) ssl_header;
-
-typedef enum
-{
-  hello_request = 0,
-  client_hello = 1,
-  server_hello = 2,
-  certificate = 11,
-  server_key_exchange = 12,
-  certificate_request = 13,
-  server_hello_done = 14,
-  certificate_verify = 15,
-  client_key_exchange = 16,
-  finished = 20,
-} HandshakeType;
-
-typedef struct
-{
-  u8 msg_type;			/* handshake type */
-  u8 length[3];			/* bytes in message */
-} Handshake_header;
-
-int dpi_ssl_detect_protocol_from_cert (u8 * payload, u32 payload_len,
-				       dpi_flow_info_t * flow);
-
-#define dpi_isprint(ch) ((ch) >= 0x20 && (ch) <= 0x7e)
-#define dpi_isalpha(ch) (((ch) >= 'a' && (ch) <= 'z') || ((ch) >= 'A' && (ch) <= 'Z'))
-#define dpi_isdigit(ch) ((ch) >= '0' && (ch) <= '9')
-#define dpi_isspace(ch) (((ch) >= '\t' && (ch) <= '\r') || ((ch) == ' '))
-#define dpi_min(a,b)   ((a < b) ? a : b)
-
-static void
-dpi_set_detected_protocol (dpi_flow_info_t * flow,
-			   u32 upper_protocol, u32 lower_protocol)
-{
-
-  if ((upper_protocol == DPI_PROTOCOL_UNKNOWN)
-      && (lower_protocol != DPI_PROTOCOL_UNKNOWN))
-    upper_protocol = lower_protocol;
-
-  if (upper_protocol == lower_protocol)
-    lower_protocol = DPI_PROTOCOL_UNKNOWN;
-
-  if ((upper_protocol != DPI_PROTOCOL_UNKNOWN)
-      && (lower_protocol == DPI_PROTOCOL_UNKNOWN))
-    {
-      if ((flow->guessed_host_protocol_id != DPI_PROTOCOL_UNKNOWN)
-	  && (upper_protocol != flow->guessed_host_protocol_id))
-	{
-	  lower_protocol = upper_protocol;
-	  upper_protocol = flow->guessed_host_protocol_id;
-	}
-    }
-
-  flow->detected_protocol[0] = upper_protocol;
-  flow->detected_protocol[1] = lower_protocol;
-}
-
-static u32
-dpi_ssl_refine_master_protocol (dpi_flow_info_t * flow, u32 protocol)
-{
-
-  if (flow->l4.tcp.ssl_got_server_cert == 1)
-    protocol = DPI_PROTOCOL_SSL;
-  else
-    protocol = DPI_PROTOCOL_SSL_NO_CERT;
-
-  return protocol;
-}
-
-int
-dpi_ssl_detect_protocol_from_cert (u8 * payload, u32 payload_len,
-				   dpi_flow_info_t * flow)
-{
-  u32 host_protocol = DPI_PROTOCOL_UNKNOWN;
-  int rv = 0;
-
-  /* Only check SSL handshake packets.
-   * Check first segment and subsequent segments. */
-  if (((payload_len > (sizeof (ssl_header) + sizeof (Handshake_header)))
-       && (payload[0] == handshake)) || (flow->detect_begin))
-    {
-      if ((flow->detected_protocol[0] == DPI_PROTOCOL_UNKNOWN)
-	  || (flow->detected_protocol[0] == DPI_PROTOCOL_SSL))
-	{
-	  rv = dpi_search_host_protocol (flow, (char *) payload, payload_len,
-					 DPI_PROTOCOL_SSL, &host_protocol);
-
-	  if (host_protocol != DPI_PROTOCOL_UNKNOWN)
-	    {
-	      dpi_set_detected_protocol (flow, host_protocol,
-					 dpi_ssl_refine_master_protocol (flow,
-									 DPI_PROTOCOL_SSL));
-	      return rv;
-	    }
-	}
-    }
-  return 0;
-}
-
-
-void
-dpi_search_tcp_ssl (u8 * payload, u32 payload_len, dpi_flow_info_t * flow)
-{
-  u32 cur_len = payload_len;
-  u32 cur_len2;
-  u8 handshake_type;
-
-  /* Check first segment of SSL Certificate message */
-  if ((payload_len > (sizeof (ssl_header) + sizeof (Handshake_header)))
-      && (payload[0] == handshake))
-    {
-      handshake_type = payload[5];
-
-      if (handshake_type == client_hello)
-	{
-	  flow->l4.tcp.ssl_stage = State_Client_Hello;
-	  return;
-	}
-      else if (handshake_type == server_hello)
-	{
-	  cur_len = ntohs (get_u16_t (payload, 3)) + sizeof (ssl_header);
-
-	  /* This packet only contains Server Hello message */
-	  if (cur_len == payload_len)
-	    {
-	      flow->l4.tcp.ssl_stage = State_Server_Hello;
-	      return;
-	    }
-
-	  /* This packet contains Server Hello, Certificate and more messages */
-	  if (payload_len >= cur_len + sizeof (ssl_header)
-	      && payload[cur_len] == handshake
-	      && payload[cur_len + 1] == MAJOR_TLS)
-	    {
-	      cur_len2 = ntohs (get_u16_t (payload, cur_len + 3))
-		+ sizeof (ssl_header);
-	      if (payload[cur_len + 5] == certificate)
-		{
-		  flow->l4.tcp.ssl_stage = State_Certificate;
-		  flow->detect_begin = 1;
-		  /* Scan segments of certificate message */
-		  if (dpi_ssl_detect_protocol_from_cert (&payload[cur_len],
-							 cur_len2, flow) > 0)
-		    return;
-		}
-	    }
-	}
-      else if (handshake_type == certificate)
-	{
-	  cur_len = ntohs (get_u16_t (payload, 3)) + sizeof (ssl_header);
-
-	  /* This packet contains first segment of certificate message */
-	  if (cur_len == payload_len)
-	    {
-	      flow->l4.tcp.ssl_stage = State_Certificate;
-	      flow->detect_begin = 1;
-	      /* Scan segments of certificate message */
-	      if (dpi_ssl_detect_protocol_from_cert (payload, cur_len, flow) >
-		  0)
-		return;
-	    }
-	}
-      else if (flow->detect_begin)
-	{
-	  /* Check subsequent segments of SSL Certificate message */
-	  if (dpi_ssl_detect_protocol_from_cert (payload, cur_len, flow) > 0)
-	    return;
-	}
-    }
-
-  return;
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */