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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Component */
/** */
/** User Datagram Protocol (UDP) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SOURCE_CODE
/* Include necessary system files. */
#include "nx_api.h"
#include "nx_udp.h"
#include "nx_ip.h"
#include "nx_ipv6.h"
/* Bring in externs for caller checking code. */
NX_CALLER_CHECKING_EXTERNS
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxde_udp_socket_source_send PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function performs error checking on the UDP socket send */
/* via source address service. */
/* */
/* INPUT */
/* */
/* socket_ptr Pointer to the UDP socket */
/* packet_ptr Pointer to packet to send */
/* ip_address Pointer to destination address*/
/* port Destination port number */
/* address_index Index of IPv4 or IPv6 address */
/* to use as the source address*/
/* */
/* OUTPUT */
/* */
/* status Actual completion status */
/* NX_PTR_ERROR Invalid pointer input */
/* NX_NOT_ENABLED UDP not enabled on IP instance*/
/* NX_IP_ADDRESS_ERROR Invalid input address */
/* NX_INVALID_INTERFACE Invalid interface input */
/* */
/* CALLS */
/* */
/* _nxde_udp_socket_source_send Actual UDP socket socket */
/* send function */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Yuxin Zhou Initial Version 6.0 */
/* 09-30-2020 Yuxin Zhou Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _nxde_udp_socket_source_send(NX_UDP_SOCKET *socket_ptr, NX_PACKET *packet_ptr,
NXD_ADDRESS *ip_address, UINT port, UINT address_index)
{
UINT status;
UINT ip_header_size;
/* Check for invalid input pointers. */
if ((socket_ptr == NX_NULL) || (packet_ptr == NX_NULL) || (ip_address == NX_NULL) || (socket_ptr -> nx_udp_socket_id != NX_UDP_ID))
{
return(NX_PTR_ERROR);
}
/* Verify UDP is enabled. */
if (!(socket_ptr -> nx_udp_socket_ip_ptr) -> nx_ip_udp_packet_receive)
{
return(NX_NOT_ENABLED);
}
/* Check that the destination address version is either IPv4 or IPv6. */
#ifndef NX_DISABLE_IPV4
if (ip_address -> nxd_ip_version == NX_IP_VERSION_V4)
{
if (address_index >= NX_MAX_IP_INTERFACES)
{
return(NX_INVALID_INTERFACE);
}
if (ip_address -> nxd_ip_address.v4 == 0)
{
return(NX_IP_ADDRESS_ERROR);
}
ip_header_size = (UINT)sizeof(NX_IPV4_HEADER);
}
else
#endif /* !NX_DISABLE_IPV4 */
#ifdef FEATURE_NX_IPV6
if (ip_address -> nxd_ip_version == NX_IP_VERSION_V6)
{
if (address_index >= (NX_MAX_IPV6_ADDRESSES + NX_LOOPBACK_IPV6_ENABLED))
{
return(NX_INVALID_INTERFACE);
}
if (CHECK_UNSPECIFIED_ADDRESS(&ip_address -> nxd_ip_address.v6[0]))
{
return(NX_IP_ADDRESS_ERROR);
}
ip_header_size = (UINT)sizeof(NX_IPV6_HEADER);
}
else
#endif /* FEATURE_NX_IPV6 */
{
return(NX_IP_ADDRESS_ERROR);
}
/* Check for an invalid packet prepend pointer. */
/*lint -e{946} -e{947} suppress pointer subtraction, since it is necessary. */
if ((INT)(packet_ptr -> nx_packet_prepend_ptr - packet_ptr -> nx_packet_data_start) < (INT)(ip_header_size + sizeof(NX_UDP_HEADER)))
{
#ifndef NX_DISABLE_UDP_INFO
/* Increment the total UDP invalid packet count. */
(socket_ptr -> nx_udp_socket_ip_ptr) -> nx_ip_udp_invalid_packets++;
/* Increment the total UDP invalid packet count for this socket. */
socket_ptr -> nx_udp_socket_invalid_packets++;
#endif
/* Return error code. */
return(NX_UNDERFLOW);
}
/* Check for an invalid packet append pointer. */
/*lint -e{946} suppress pointer subtraction, since it is necessary. */
if (packet_ptr -> nx_packet_append_ptr > packet_ptr -> nx_packet_data_end)
{
#ifndef NX_DISABLE_UDP_INFO
/* Increment the total UDP invalid packet count. */
(socket_ptr -> nx_udp_socket_ip_ptr) -> nx_ip_udp_invalid_packets++;
/* Increment the total UDP invalid packet count for this socket. */
socket_ptr -> nx_udp_socket_invalid_packets++;
#endif
/* Return error code. */
return(NX_OVERFLOW);
}
/* Check for an invalid port. */
if (((ULONG)port) > (ULONG)NX_MAX_PORT)
{
return(NX_INVALID_PORT);
}
/* Check for appropriate caller. */
NX_THREADS_ONLY_CALLER_CHECKING
/* Call actual UDP socket send function. */
status = _nxd_udp_socket_source_send(socket_ptr, packet_ptr, ip_address, port, address_index);
/* Return completion status. */
return(status);
}