pal_network.h

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// ----------------------------------------------------------------------------
// Copyright 2016-2019 ARM Ltd.
//
// SPDX-License-Identifier: Apache-2.0
//
// 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.
// ----------------------------------------------------------------------------

#ifndef _PAL_SOCKET_H
#define _PAL_SOCKET_H

#ifndef _PAL_H
    #error "Please do not include this file directly, use pal.h instead"
#endif


#ifdef __cplusplus
extern "C" {
#endif

typedef uint32_t palSocketLength_t; 
typedef void* palSocket_t; 
#define  PAL_NET_MAX_ADDR_SIZE 32 // check if we can make this more efficient

typedef struct palSocketAddress {
    unsigned short    addressType;    
    char              addressData[PAL_NET_MAX_ADDR_SIZE];  
} palSocketAddress_t; 
typedef struct palNetInterfaceInfo{
    char interfaceName[16]; //15 + ‘\0’
    palSocketAddress_t address;
    uint32_t addressSize;
} palNetInterfaceInfo_t;

typedef enum {
    PAL_AF_UNSPEC = 0,
    PAL_AF_INET = 2,    
    PAL_AF_INET6 = 10, 
} palSocketDomain_t;

typedef enum {
    PAL_NETWORK_STATUS_DISCONNECTED = 0,
    PAL_NETWORK_STATUS_CONNECTED = 1
} palNetworkStatus_t;

typedef enum {
#if PAL_NET_TCP_AND_TLS_SUPPORT
    PAL_SOCK_STREAM = 1,    
    PAL_SOCK_STREAM_SERVER = 99,    
#endif //PAL_NET_TCP_AND_TLS_SUPPORT
    PAL_SOCK_DGRAM = 2  
} palSocketType_t;

typedef enum {
    PAL_SO_REUSEADDR = 0x0004,  
#if PAL_NET_TCP_AND_TLS_SUPPORT // Socket options below supported only if TCP is supported.
    PAL_SO_KEEPALIVE = 0x0008, 
    PAL_SO_KEEPIDLE = 0x0009,  
    PAL_SO_KEEPINTVL = 0x0010, 
#endif //PAL_NET_TCP_AND_TLS_SUPPORT
    PAL_SO_SNDTIMEO = 0x1005,  
    PAL_SO_RCVTIMEO = 0x1006,  
} palSocketOptionName_t;

#define PAL_NET_DEFAULT_INTERFACE 0xFFFFFFFF

#define PAL_IPV4_ADDRESS_SIZE 4
#define PAL_IPV6_ADDRESS_SIZE 16

typedef uint8_t palIpV4Addr_t[PAL_IPV4_ADDRESS_SIZE];
typedef uint8_t palIpV6Addr_t[PAL_IPV6_ADDRESS_SIZE];

typedef void(*connectionStatusCallback) (palNetworkStatus_t status, void *client_arg);

palStatus_t pal_registerNetworkInterface(void* networkInterfaceContext, uint32_t* interfaceIndex);

palStatus_t pal_unregisterNetworkInterface(uint32_t interfaceIndex);

palStatus_t pal_setSockAddrPort(palSocketAddress_t* address, uint16_t port);

palStatus_t pal_setSockAddrIPV4Addr(palSocketAddress_t* address, palIpV4Addr_t ipV4Addr);

palStatus_t pal_getSockAddrIPV4Addr(const palSocketAddress_t* address, palIpV4Addr_t ipV4Addr);

palStatus_t pal_setSockAddrIPV6Addr(palSocketAddress_t* address, palIpV6Addr_t ipV6Addr);

palStatus_t pal_getSockAddrIPV6Addr(const palSocketAddress_t* address, palIpV6Addr_t ipV6Addr);

palStatus_t pal_getSockAddrPort(const palSocketAddress_t* address, uint16_t* port);

palStatus_t pal_setSocketOptions(palSocket_t socket, int optionName, const void* optionValue, palSocketLength_t optionLength);

palStatus_t pal_isNonBlocking(palSocket_t socket, bool* isNonBlocking);

palStatus_t pal_bind(palSocket_t socket, palSocketAddress_t* myAddress, palSocketLength_t addressLength);

palStatus_t pal_receiveFrom(palSocket_t socket, void* buffer, size_t length, palSocketAddress_t* from, palSocketLength_t* fromLength, size_t* bytesReceived);

palStatus_t pal_sendTo(palSocket_t socket, const void* buffer, size_t length, const palSocketAddress_t* to, palSocketLength_t toLength, size_t* bytesSent);

palStatus_t pal_close(palSocket_t* socket);

palStatus_t pal_getNumberOfNetInterfaces(uint32_t* numInterfaces);

palStatus_t pal_getNetInterfaceInfo(uint32_t interfaceNum, palNetInterfaceInfo_t* interfaceInfo);

palStatus_t pal_setConnectionStatusCallback(uint32_t interfaceNum, connectionStatusCallback callback, void *client_arg);

#define PAL_NET_SOCKET_SELECT_MAX_SOCKETS 8
#define PAL_NET_SOCKET_SELECT_RX_BIT (1)
#define PAL_NET_SOCKET_SELECT_TX_BIT (2)
#define PAL_NET_SOCKET_SELECT_ERR_BIT (4)

#define PAL_NET_SELECT_IS_RX(socketStatus, index)   ((socketStatus[index] & PAL_NET_SOCKET_SELECT_RX_BIT) != 0) 
#define PAL_NET_SELECT_IS_TX(socketStatus, index)   ((socketStatus[index] & PAL_NET_SOCKET_SELECT_TX_BIT) != 0) 
#define PAL_NET_SELECT_IS_ERR(socketStatus, index)  ((socketStatus[index] & PAL_NET_SOCKET_SELECT_ERR_BIT) != 0) 
typedef void(*palAsyncSocketCallback_t)(void*);

#if PAL_NET_TCP_AND_TLS_SUPPORT // The functionality below is supported only if TCP is supported.

#if PAL_NET_SERVER_SOCKET_API

palStatus_t pal_listen(palSocket_t socket, int backlog);

palStatus_t pal_accept(palSocket_t socket, palSocketAddress_t* address, palSocketLength_t* addressLen, palSocket_t* acceptedSocket, palAsyncSocketCallback_t callback, void* callbackArgument);

#endif // PAL_NET_SERVER_SOCKET_API

palStatus_t pal_connect(palSocket_t socket, const palSocketAddress_t* address, palSocketLength_t addressLen);

palStatus_t pal_recv(palSocket_t socket, void* buf, size_t len, size_t* recievedDataSize);

palStatus_t pal_send(palSocket_t socket, const void* buf, size_t len, size_t* sentDataSize);


#endif //PAL_NET_TCP_AND_TLS_SUPPORT

palStatus_t pal_asynchronousSocket(palSocketDomain_t domain, palSocketType_t type, bool nonBlockingSocket, uint32_t interfaceNum, palAsyncSocketCallback_t callback, palSocket_t* socket);

palStatus_t pal_asynchronousSocketWithArgument(palSocketDomain_t domain, palSocketType_t type, bool nonBlockingSocket, uint32_t interfaceNum, palAsyncSocketCallback_t callback,void* callbackArgument, palSocket_t* socket);


#if PAL_NET_DNS_SUPPORT
#if (PAL_DNS_API_VERSION == 0) || (PAL_DNS_API_VERSION == 1)

palStatus_t pal_getAddressInfo(const char* hostname, palSocketAddress_t* address, palSocketLength_t* addressLength);

#if (PAL_DNS_API_VERSION == 1)

typedef void(*palGetAddressInfoAsyncCallback_t)(const char* hostname, palSocketAddress_t* address, palSocketLength_t* addressLength, palStatus_t status, void* callbackArgument);

palStatus_t pal_getAddressInfoAsync(const char* hostname, palSocketAddress_t* address, palSocketLength_t* addressLength, palGetAddressInfoAsyncCallback_t callback, void* callbackArgument);
#endif

#elif (PAL_DNS_API_VERSION == 2)
typedef int32_t palDNSQuery_t; 
typedef void(*palGetAddressInfoAsyncCallback_t)(const char* hostname, palSocketAddress_t* address, palStatus_t status, void* callbackArgument);

typedef struct pal_asyncAddressInfo
{
    char* hostname;
    palSocketAddress_t* address;
    palGetAddressInfoAsyncCallback_t callback;
    void* callbackArgument;
    palDNSQuery_t *queryHandle;
} pal_asyncAddressInfo_t;

palStatus_t pal_getAddressInfoAsync(const char* hostname,
                                     palSocketAddress_t* address,
                                     palGetAddressInfoAsyncCallback_t callback,
                                     void* callbackArgument,
                                     palDNSQuery_t* queryHandle);

palStatus_t pal_cancelAddressInfoAsync(palDNSQuery_t queryHandle);
#else
    #error "Please specify the platform PAL_DNS_API_VERSION 0, 1, or 2."
#endif //  PAL_DNS_API_VERSION
#endif  // PAL_NET_DNS_SUPPORT

#ifdef __cplusplus
}
#endif
#endif //_PAL_SOCKET_H