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/***************************************************************************/
/* Copyright (c) 2024 Microsoft Corporation */
/* Copyright (c) 2026 Eclipse ThreadX contributors */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the MIT License which is available at */
/* https://opensource.org/licenses/MIT. */
/* */
/* SPDX-License-Identifier: MIT */
/***************************************************************************/
/* This file contains common process functions. */
#include "tx_api.h"
#include "nx_api.h"
#if !defined(NX_DISABLE_IPV4) && defined(__PRODUCT_NETXDUO__) && !defined(NX_DISABLE_PACKET_CHAIN)
#include "nx_websocket_client.h"
#define TEST_CONNECT_GUID "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
#define TEST_CONNECT_GUID_SIZE (sizeof(TEST_CONNECT_GUID) - 1)
#define TEST_CONNECT_DIGEST_SIZE 20 /* The length of SHA-1 hash is 20 bytes */
#define TEST_CONNECT_KEY_SIZE 32 /* Make it larger than the minimum length (28 bytes )for the encoded key */
static UCHAR connect_key[TEST_CONNECT_KEY_SIZE];
static UINT connect_key_size;
UINT _server_connect_response_process(NX_PACKET *packet_ptr)
{
UCHAR *buffer_ptr;
UINT offset = 0;
UCHAR *field_name;
UINT field_name_length;
UCHAR *field_value;
UINT field_value_length;
NX_SHA1 SH;
UCHAR digest[TEST_CONNECT_DIGEST_SIZE];
buffer_ptr = packet_ptr -> nx_packet_prepend_ptr;
/* Skip over the first Command line (GET /xxx HTTP/1.1\r\n). */
while(((buffer_ptr + 1) < packet_ptr -> nx_packet_append_ptr) &&
(*buffer_ptr != '\r') && (*(buffer_ptr + 1) != '\n'))
{
buffer_ptr++;
offset++;
}
/* Skip over the CR,LF. */
buffer_ptr += 2;
offset += 2;
/* Skip over the first Host line (Host: xxx\r\n). */
while(((buffer_ptr + 1) < packet_ptr -> nx_packet_append_ptr) &&
(*buffer_ptr != '\r') && (*(buffer_ptr + 1) != '\n'))
{
buffer_ptr++;
offset++;
}
/* Skip over the CR,LF. */
buffer_ptr += 2;
offset += 2;
/* Loop until we find the "cr,lf,cr,lf" token. */
while (((buffer_ptr + 1) < packet_ptr -> nx_packet_append_ptr) && (*buffer_ptr != 0))
{
/* Check for the <cr,lf,cr,lf> token. This signals a blank line, which also
specifies the start of the content. */
if ((*buffer_ptr == '\r') &&
(*(buffer_ptr + 1) == '\n'))
{
/* Adjust the offset. */
offset = offset + 2;
break;
}
/* We haven't seen the <cr,lf,cr,lf> so we are still processing header data.
Extract the field name and it's value. */
field_name = buffer_ptr;
field_name_length = 0;
/* Look for the ':' that separates the field name from its value. */
while(*buffer_ptr != ':')
{
buffer_ptr++;
field_name_length++;
}
offset += field_name_length;
/* Skip ':'. */
buffer_ptr++;
offset++;
/* Now skip over white space. */
while ((buffer_ptr < packet_ptr -> nx_packet_append_ptr) && (*buffer_ptr == ' '))
{
buffer_ptr++;
offset++;
}
/* Now get the field value. */
field_value = buffer_ptr;
field_value_length = 0;
/* Loop until we see a <CR, LF>. */
while(((buffer_ptr + 1) < packet_ptr -> nx_packet_append_ptr) && (*buffer_ptr != '\r') && (*(buffer_ptr+1) != '\n'))
{
buffer_ptr++;
field_value_length++;
}
offset += field_value_length;
/* Skip over the CR,LF. */
buffer_ptr += 2;
offset += 2;
/* Check the upgrade. */
if (_nx_websocket_client_name_compare((UCHAR *)field_name, field_name_length, (UCHAR *)"Upgrade", sizeof("Upgrade") - 1) == NX_SUCCESS)
{
if (_nx_websocket_client_name_compare((UCHAR *)field_value, field_value_length, (UCHAR *)"websocket", sizeof("websocket") - 1))
{
return(NX_WEBSOCKET_INVALID_PACKET);
}
}
else if (_nx_websocket_client_name_compare((UCHAR *)field_name, field_name_length, (UCHAR *)"Connection", sizeof("Connection") - 1) == NX_SUCCESS)
{
if (_nx_websocket_client_name_compare((UCHAR *)field_value, field_value_length, (UCHAR *)"Upgrade", sizeof("Upgrade") - 1))
{
return(NX_WEBSOCKET_INVALID_PACKET);
}
}
else if (_nx_websocket_client_name_compare((UCHAR *)field_name, field_name_length, (UCHAR *)"Sec-WebSocket-Key", sizeof("Sec-WebSocket-Key") - 1) == NX_SUCCESS)
{
/* Calculate the SHA-1 hash of the concatenation of the client key and the Globally Unique Identifier (GUID)
Referenced in RFC 6455, Section 1.3, Page 6 */
_nx_sha1_initialize(&SH);
_nx_sha1_update(&SH, field_value, field_value_length);
_nx_sha1_update(&SH, (UCHAR*)TEST_CONNECT_GUID, TEST_CONNECT_GUID_SIZE);
_nx_sha1_digest_calculate(&SH, digest);
/* Encode the hash and compare it with the field value from the server. */
_nx_utility_base64_encode(digest, TEST_CONNECT_DIGEST_SIZE, connect_key, TEST_CONNECT_KEY_SIZE, &connect_key_size);
}
}
/* Check if the all fields are processed. */
if (offset != packet_ptr -> nx_packet_length)
{
return(NX_WEBSOCKET_INVALID_PACKET);
}
return(NX_SUCCESS);
}
#endif
void SET_ERROR_COUNTER(ULONG *error_counter, CHAR *filename, int line_number)
{
*error_counter = (*error_counter) + 1;
printf("Error: File %s:%d\n", filename, line_number);
}
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