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Data Structures | Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions
LWIP Class Reference
Inheritance diagram for LWIP:
OnboardNetworkStack NonCopyable< LWIP > NetworkStack DNS

Data Structures

class  Interface
 

Public Types

typedef mbed::Callback< void(nsapi_value_or_error_t result, SocketAddress *address)> hostbyname_cb_t
 Hostname translation callback (asynchronous) More...
 

Public Member Functions

nsapi_error_t add_ethernet_interface (EMAC &emac, bool default_if, OnboardNetworkStack::Interface **interface_out) override
 Register a network interface with the IP stack. More...
 
nsapi_error_t add_l3ip_interface (L3IP &l3ip, bool default_if, OnboardNetworkStack::Interface **interface_out) override
 Register a network interface with the IP stack. More...
 
nsapi_error_t add_ppp_interface (PPP &ppp, bool default_if, OnboardNetworkStack::Interface **interface_out) override
 Register a PPP interface with the IP stack. More...
 
nsapi_error_t remove_ethernet_interface (OnboardNetworkStack::Interface **interface_out) override
 Remove a network interface from IP stack. More...
 
nsapi_error_t remove_l3ip_interface (OnboardNetworkStack::Interface **interface_out) override
 Remove a network interface from IP stack. More...
 
nsapi_error_t remove_ppp_interface (OnboardNetworkStack::Interface **interface_out) override
 Remove a network interface from IP stack. More...
 
nsapi_error_t get_dns_server (int index, SocketAddress *address, const char *interface_name) override
 Get a domain name server from a list of servers to query. More...
 
nsapi_error_t add_dns_server (const SocketAddress &address, const char *interface_name) override
 Add a domain name server to list of servers to query. More...
 
nsapi_error_t get_ip_address (SocketAddress *address) override
 Get the local IP address. More...
 
nsapi_error_t get_ip_address_if (SocketAddress *address, const char *interface_name) override
 Get the local IP address on interface name. More...
 
void set_default_interface (OnboardNetworkStack::Interface *interface) override
 Set the network interface as default one. More...
 
OnboardNetworkStackonboardNetworkStack () final
 Dynamic downcast to a OnboardNetworkStack. More...
 
virtual nsapi_error_t get_ipv6_link_local_address (SocketAddress *address)
 Get the IPv6 link local address. More...
 
virtual nsapi_error_t gethostbyname (const char *host, SocketAddress *address, nsapi_version_t version=NSAPI_UNSPEC, const char *interface_name=NULL)
 Translates a hostname to an IP address with specific version. More...
 
virtual nsapi_value_or_error_t getaddrinfo (const char *hostname, SocketAddress *hints, SocketAddress **res, const char *interface_name=NULL)
 Translate a hostname to the multiple IP addresses with specific version using network interface name. More...
 
virtual nsapi_value_or_error_t gethostbyname_async (const char *host, hostbyname_cb_t callback, nsapi_version_t version=NSAPI_UNSPEC, const char *interface_name=NULL)
 Translates a hostname to multiple IP addresses (asynchronous) More...
 
virtual nsapi_value_or_error_t getaddrinfo_async (const char *hostname, SocketAddress *hints, hostbyname_cb_t callback, const char *interface_name=NULL)
 Translates a hostname to the multiple IP addresses (asynchronous) More...
 
virtual nsapi_error_t gethostbyname_async_cancel (int id)
 Cancels asynchronous hostname translation. More...
 

Static Public Member Functions

static OnboardNetworkStackget_default_instance ()
 Return the default on-board network stack. More...
 

Protected Member Functions

nsapi_error_t socket_open (nsapi_socket_t *handle, nsapi_protocol_t proto) override
 Opens a socket. More...
 
nsapi_error_t socket_close (nsapi_socket_t handle) override
 Close the socket. More...
 
nsapi_error_t socket_bind (nsapi_socket_t handle, const SocketAddress &address) override
 Bind a specific address to a socket. More...
 
nsapi_error_t socket_listen (nsapi_socket_t handle, int backlog) override
 Listen for connections on a TCP socket. More...
 
nsapi_error_t socket_connect (nsapi_socket_t handle, const SocketAddress &address) override
 Connects TCP socket to a remote host. More...
 
nsapi_error_t socket_accept (nsapi_socket_t server, nsapi_socket_t *handle, SocketAddress *address=0) override
 Accepts a connection on a TCP socket. More...
 
nsapi_size_or_error_t socket_send (nsapi_socket_t handle, const void *data, nsapi_size_t size) override
 Send data over a TCP socket. More...
 
nsapi_size_or_error_t socket_recv (nsapi_socket_t handle, void *data, nsapi_size_t size) override
 Receive data over a TCP socket. More...
 
nsapi_size_or_error_t socket_sendto (nsapi_socket_t handle, const SocketAddress &address, const void *data, nsapi_size_t size) override
 Send a packet over a UDP socket. More...
 
nsapi_size_or_error_t socket_recvfrom (nsapi_socket_t handle, SocketAddress *address, void *buffer, nsapi_size_t size) override
 Receive a packet over a UDP socket. More...
 
void socket_attach (nsapi_socket_t handle, void(*callback)(void *), void *data) override
 Register a callback on state change of the socket. More...
 
nsapi_error_t setsockopt (nsapi_socket_t handle, int level, int optname, const void *optval, unsigned optlen) override
 Set stack-specific socket options. More...
 
nsapi_error_t getsockopt (nsapi_socket_t handle, int level, int optname, void *optval, unsigned *optlen) override
 Get stack-specific socket options. More...
 

Detailed Description

Definition at line 41 of file LWIPStack.h.

Member Typedef Documentation

typedef mbed::Callback<void (nsapi_value_or_error_t result, SocketAddress *address)> hostbyname_cb_t
inherited

Hostname translation callback (asynchronous)

Callback will be called after DNS resolution completes or a failure occurs.

Callback should not take more than 10ms to execute, otherwise it might prevent underlying thread processing. A portable user of the callback should not make calls to network operations due to stack size limitations. The callback should not perform expensive operations such as socket recv/send calls or blocking operations.

Parameters
resultNegative error code on failure or value that represents the number of DNS records
addressOn success, destination for the host SocketAddress

Definition at line 127 of file NetworkStack.h.

Member Function Documentation

nsapi_error_t add_dns_server ( const SocketAddress address,
const char *  interface_name 
)
overridevirtual

Add a domain name server to list of servers to query.

Parameters
addressDestination for the host address
interface_nameNetwork interface name
Returns
NSAPI_ERROR_OK on success, negative error code on failure

Reimplemented from NetworkStack.

nsapi_error_t add_ethernet_interface ( EMAC emac,
bool  default_if,
OnboardNetworkStack::Interface **  interface_out 
)
overridevirtual

Register a network interface with the IP stack.

Connects EMAC layer with the IP stack and initializes all the required infrastructure. This function should be called only once for each available interface.

Parameters
emacEMAC HAL implementation for this network interface
default_iftrue if the interface should be treated as the default one
[out]interface_outpointer to stack interface object controlling the EMAC
Returns
NSAPI_ERROR_OK on success, or error code

Implements OnboardNetworkStack.

nsapi_error_t add_l3ip_interface ( L3IP l3ip,
bool  default_if,
OnboardNetworkStack::Interface **  interface_out 
)
overridevirtual

Register a network interface with the IP stack.

Connects L3IP layer with the IP stack and initializes all the required infrastructure. This function should be called only once for each available interface.

Parameters
l3ipL3IP HAL implementation for this network interface
default_iftrue if the interface should be treated as the default one
[out]interface_outpointer to stack interface object controlling the L3IP
Returns
NSAPI_ERROR_OK on success, or error code

Reimplemented from OnboardNetworkStack.

nsapi_error_t add_ppp_interface ( PPP ppp,
bool  default_if,
OnboardNetworkStack::Interface **  interface_out 
)
overridevirtual

Register a PPP interface with the IP stack.

Connects PPP layer with the IP stack and initializes all the required infrastructure. This function should be called only once for each available interface.

This is an internal function that links ppp_lwip.cpp to mbed_ipstack_lwip.cpp, once a driver starts it via the nsapi_ppp.h API.

Ultimately the nsapi_ppp.h API will be deprecated, and there will be a mbed_ipstack_add_ppp_interface() replacing nsapi_ppp_connect().

Parameters
pcbPPP implementation specific user data; will be passed to PPP callbacks
default_iftrue if the interface should be treated as the default one
stackAllow manual selection of IPv4 and/or IPv6
[out]interface_outset to interface handle that must be passed to subsequent mbed_stack calls
Returns
NSAPI_ERROR_OK on success, or error code

Reimplemented from OnboardNetworkStack.

static OnboardNetworkStack& get_default_instance ( )
staticinherited

Return the default on-board network stack.

Returns the default on-board network stack, as configured by JSON option nsapi.default-stack.

nsapi_error_t get_dns_server ( int  index,
SocketAddress address,
const char *  interface_name 
)
overridevirtual

Get a domain name server from a list of servers to query.

Returns a DNS server address for a index. If returns error no more DNS servers to read.

Parameters
indexIndex of the DNS server, starts from zero
addressDestination for the host address
Returns
0 on success, negative error code on failure

Reimplemented from NetworkStack.

nsapi_error_t get_ip_address ( SocketAddress address)
overridevirtual

Get the local IP address.

Parameters
addressSocketAddress representation of the local IP address
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESSif the address cannot be obtained from stack

Reimplemented from NetworkStack.

nsapi_error_t get_ip_address_if ( SocketAddress address,
const char *  interface_name 
)
overridevirtual

Get the local IP address on interface name.

Parameters
addressSocketAddress representation of the link local IPv6 address
interface_nameNetwork interface_name
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESSif the address cannot be obtained from stack

Reimplemented from NetworkStack.

virtual nsapi_error_t get_ipv6_link_local_address ( SocketAddress address)
virtualinherited

Get the IPv6 link local address.

Parameters
addressSocketAddress representation of the link local IPv6 address
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid
virtual nsapi_value_or_error_t getaddrinfo ( const char *  hostname,
SocketAddress hints,
SocketAddress **  res,
const char *  interface_name = NULL 
)
virtualinherited

Translate a hostname to the multiple IP addresses with specific version using network interface name.

The hostname may be either a domain name or an IP address. If the hostname is an IP address, no network transactions will be performed.

If no stack-specific DNS resolution is provided, the hostname will be resolve using a UDP socket on the stack.

Parameters
hostnameHostname to resolve.
hintsPointer to a SocketAddress with query parameters.
resPointer to a SocketAddress array to store the result..
interface_nameNetwork interface name
Returns
number of results on success, negative error code on failure.

Implements DNS.

virtual nsapi_value_or_error_t getaddrinfo_async ( const char *  hostname,
SocketAddress hints,
hostbyname_cb_t  callback,
const char *  interface_name = NULL 
)
virtualinherited

Translates a hostname to the multiple IP addresses (asynchronous)

The hostname may be either a domain name or an IP address. If the hostname is an IP address, no network transactions will be performed.

If no stack-specific DNS resolution is provided, the hostname will be resolve using a UDP socket on the stack.

The call is non-blocking. Result of the DNS operation is returned by the callback. If this function returns failure, callback will not be called. In case that IP addresses are found from DNS cache, callback will be called before function returns.

Parameters
hostnameHostname to resolve
hintsPointer to a SocketAddress with query parameters.
callbackCallback that is called for result
interface_nameNetwork interface_name
Returns
0 on immediate success, negative error code on immediate failure or a positive unique id that represents the hostname translation operation and can be passed to cancel

Implements DNS.

virtual nsapi_error_t gethostbyname ( const char *  host,
SocketAddress address,
nsapi_version_t  version = NSAPI_UNSPEC,
const char *  interface_name = NULL 
)
virtualinherited

Translates a hostname to an IP address with specific version.

The hostname may be either a domain name or an IP address. If the hostname is an IP address, no network transactions will be performed.

If no stack-specific DNS resolution is provided, the hostname will be resolve using a UDP socket on the stack.

Parameters
hostHostname to resolve
addressPointer to a SocketAddress to store the result.
versionIP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC)
interface_nameNetwork interface_name
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_PARAMETERif invalid (null) name is provided
NSAPI_ERROR_DNS_FAILUREif DNS resolution fails
intother negative errors, see nsapi_dns_query

Implements DNS.

Reimplemented in Nanostack, UBLOX_AT_CellularStack, and RM1000_AT_CellularStack.

virtual nsapi_value_or_error_t gethostbyname_async ( const char *  host,
hostbyname_cb_t  callback,
nsapi_version_t  version = NSAPI_UNSPEC,
const char *  interface_name = NULL 
)
virtualinherited

Translates a hostname to multiple IP addresses (asynchronous)

The hostname may be either a domain name or an IP address. If the hostname is an IP address, no network transactions will be performed.

If no stack-specific DNS resolution is provided, the hostname will be resolve using a UDP socket on the stack.

Call is non-blocking. Result of the DNS operation is returned by the callback. If this function returns failure, callback will not be called. In case result is success (IP address was found from DNS cache), callback will be called before function returns.

Parameters
hostHostname to resolve
callbackCallback that is called for result
versionIP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC)
interface_nameNetwork interface_name
Returns
0 on immediate success, negative error code on immediate failure or a positive unique id that represents the hostname translation operation and can be passed to cancel

Implements DNS.

Reimplemented in Nanostack.

virtual nsapi_error_t gethostbyname_async_cancel ( int  id)
virtualinherited

Cancels asynchronous hostname translation.

When translation is cancelled, callback will not be called.

Parameters
idUnique id of the hostname translation operation
Returns
NSAPI_ERROR_OK on success, negative error code on failure

Implements DNS.

nsapi_error_t getsockopt ( nsapi_socket_t  handle,
int  level,
int  optname,
void *  optval,
unsigned *  optlen 
)
overrideprotectedvirtual

Get stack-specific socket options.

The getstackopt allow an application to retrieve stack-specific hints from the underlying stack. For unsupported options, NSAPI_ERROR_UNSUPPORTED is returned and optval is unmodified.

Parameters
handleSocket handle.
levelStack-specific protocol level.
optnameStack-specific option identifier.
optvalDestination for option value.
optlenLength of the option value.
Returns
NSAPI_ERROR_OK on success, negative error code on failure.

Reimplemented from NetworkStack.

OnboardNetworkStack* onboardNetworkStack ( )
finalvirtualinherited

Dynamic downcast to a OnboardNetworkStack.

Reimplemented from NetworkStack.

Definition at line 199 of file OnboardNetworkStack.h.

nsapi_error_t remove_ethernet_interface ( OnboardNetworkStack::Interface **  interface_out)
overridevirtual

Remove a network interface from IP stack.

Removes layer 3 IP objects,network interface from stack list .

Parameters
[out]interface_outpointer to stack interface object controlling the EMAC
Returns
NSAPI_ERROR_OK on success, or error code

Reimplemented from OnboardNetworkStack.

nsapi_error_t remove_l3ip_interface ( OnboardNetworkStack::Interface **  interface_out)
overridevirtual

Remove a network interface from IP stack.

Removes PPP objects,network interface from stack list, and shutdown device driver.

Parameters
[out]interface_outpointer to stack interface object controlling the PPP
Returns
NSAPI_ERROR_OK on success, or error code

Reimplemented from OnboardNetworkStack.

nsapi_error_t remove_ppp_interface ( OnboardNetworkStack::Interface **  interface_out)
overridevirtual

Remove a network interface from IP stack.

Removes PPP objects,network interface from stack list, and shutdown device driver.

Parameters
[out]interface_outpointer to stack interface object controlling the PPP
Returns
NSAPI_ERROR_OK on success, or error code

Reimplemented from OnboardNetworkStack.

void set_default_interface ( OnboardNetworkStack::Interface interface)
overridevirtual

Set the network interface as default one.

Reimplemented from OnboardNetworkStack.

nsapi_error_t setsockopt ( nsapi_socket_t  handle,
int  level,
int  optname,
const void *  optval,
unsigned  optlen 
)
overrideprotectedvirtual

Set stack-specific socket options.

The setsockopt allow an application to pass stack-specific hints to the underlying stack. For unsupported options, NSAPI_ERROR_UNSUPPORTED is returned and the socket is unmodified.

Parameters
handleSocket handle.
levelStack-specific protocol level.
optnameStack-specific option identifier.
optvalOption value.
optlenLength of the option value.
Returns
NSAPI_ERROR_OK on success, negative error code on failure.

Reimplemented from NetworkStack.

nsapi_error_t socket_accept ( nsapi_socket_t  server,
nsapi_socket_t handle,
SocketAddress address = 0 
)
overrideprotectedvirtual

Accepts a connection on a TCP socket.

The server socket must be bound and set to listen for connections. On a new connection, creates a network socket and stores it in the specified handle. The handle must be passed to following calls on the socket.

A stack may have a finite number of sockets, in this case NSAPI_ERROR_NO_SOCKET is returned if no socket is available.

This call is non-blocking. If accept would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

Parameters
serverSocket handle to server to accept from
handleDestination for a handle to the newly created socket
addressDestination for the remote address or NULL
Returns
0 on success, negative error code on failure

Implements NetworkStack.

void socket_attach ( nsapi_socket_t  handle,
void(*)(void *)  callback,
void *  data 
)
overrideprotectedvirtual

Register a callback on state change of the socket.

The specified callback will be called on state changes such as when the socket can recv/send/accept successfully and on when an error occurs. The callback may also be called spuriously without reason.

The callback may be called in an interrupt context and should not perform expensive operations such as recv/send calls.

Parameters
handleSocket handle
callbackFunction to call on state change
dataArgument to pass to callback

Implements NetworkStack.

nsapi_error_t socket_bind ( nsapi_socket_t  handle,
const SocketAddress address 
)
overrideprotectedvirtual

Bind a specific address to a socket.

Binding a socket specifies the address and port on which to recieve data. If the IP address is zeroed, only the port is bound.

Parameters
handleSocket handle
addressLocal address to bind
Returns
0 on success, negative error code on failure.

Implements NetworkStack.

nsapi_error_t socket_close ( nsapi_socket_t  handle)
overrideprotectedvirtual

Close the socket.

Closes any open connection and deallocates any memory associated with the socket.

Parameters
handleSocket handle
Returns
0 on success, negative error code on failure

Implements NetworkStack.

nsapi_error_t socket_connect ( nsapi_socket_t  handle,
const SocketAddress address 
)
overrideprotectedvirtual

Connects TCP socket to a remote host.

Initiates a connection to a remote server specified by the indicated address.

Parameters
handleSocket handle
addressThe SocketAddress of the remote host
Returns
0 on success, negative error code on failure

Implements NetworkStack.

nsapi_error_t socket_listen ( nsapi_socket_t  handle,
int  backlog 
)
overrideprotectedvirtual

Listen for connections on a TCP socket.

Marks the socket as a passive socket that can be used to accept incoming connections.

Parameters
handleSocket handle
backlogNumber of pending connections that can be queued simultaneously
Returns
0 on success, negative error code on failure

Implements NetworkStack.

nsapi_error_t socket_open ( nsapi_socket_t handle,
nsapi_protocol_t  proto 
)
overrideprotectedvirtual

Opens a socket.

Creates a network socket and stores it in the specified handle. The handle must be passed to following calls on the socket.

A stack may have a finite number of sockets, in this case NSAPI_ERROR_NO_SOCKET is returned if no socket is available.

Parameters
handleDestination for the handle to a newly created socket
protoProtocol of socket to open, NSAPI_TCP or NSAPI_UDP
Returns
0 on success, negative error code on failure

Implements NetworkStack.

nsapi_size_or_error_t socket_recv ( nsapi_socket_t  handle,
void *  data,
nsapi_size_t  size 
)
overrideprotectedvirtual

Receive data over a TCP socket.

The socket must be connected to a remote host. Returns the number of bytes received into the buffer.

This call is non-blocking. If recv would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

Parameters
handleSocket handle
dataDestination buffer for data received from the host
sizeSize of the buffer in bytes
Returns
Number of received bytes on success, negative error code on failure

Implements NetworkStack.

nsapi_size_or_error_t socket_recvfrom ( nsapi_socket_t  handle,
SocketAddress address,
void *  buffer,
nsapi_size_t  size 
)
overrideprotectedvirtual

Receive a packet over a UDP socket.

Receives data and stores the source address in address if address is not NULL. Returns the number of bytes received into the buffer.

This call is non-blocking. If recvfrom would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

Parameters
handleSocket handle
addressDestination for the source address or NULL
bufferDestination buffer for data received from the host
sizeSize of the buffer in bytes
Returns
Number of received bytes on success, negative error code on failure

Implements NetworkStack.

nsapi_size_or_error_t socket_send ( nsapi_socket_t  handle,
const void *  data,
nsapi_size_t  size 
)
overrideprotectedvirtual

Send data over a TCP socket.

The socket must be connected to a remote host. Returns the number of bytes sent from the buffer.

This call is non-blocking. If send would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

Parameters
handleSocket handle
dataBuffer of data to send to the host
sizeSize of the buffer in bytes
Returns
Number of sent bytes on success, negative error code on failure

Implements NetworkStack.

nsapi_size_or_error_t socket_sendto ( nsapi_socket_t  handle,
const SocketAddress address,
const void *  data,
nsapi_size_t  size 
)
overrideprotectedvirtual

Send a packet over a UDP socket.

Sends data to the specified address. Returns the number of bytes sent from the buffer.

This call is non-blocking. If sendto would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

Parameters
handleSocket handle
addressThe SocketAddress of the remote host
dataBuffer of data to send to the host
sizeSize of the buffer in bytes
Returns
Number of sent bytes on success, negative error code on failure

Implements NetworkStack.

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