Class AT_CellularStack. More...
#include <AT_CellularStack.h>
Data Structures | |
class | CellularSocket |
Public Types | |
typedef mbed::Callback< void(nsapi_error_t result, SocketAddress *address)> | hostbyname_cb_t |
Hostname translation callback (asynchronous) More... | |
Public Member Functions | |
virtual nsapi_error_t | get_ip_address (SocketAddress *address) |
Get the local IP address. More... | |
void | set_cid (int cid) |
Set PDP context ID for this stack. More... | |
virtual nsapi_error_t | get_ipv6_link_local_address (SocketAddress *address) |
Get the IPv6 link local address. More... | |
virtual nsapi_error_t | get_ip_address_if (SocketAddress *address, const char *interface_name) |
Get the local IP address on interface name. 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 | gethostbyname_async (const char *host, hostbyname_cb_t callback, nsapi_version_t version=NSAPI_UNSPEC, const char *interface_name=NULL) |
Translates a hostname to an IP address (asynchronous) More... | |
virtual nsapi_error_t | gethostbyname_async_cancel (int id) |
Cancels asynchronous hostname translation. More... | |
virtual nsapi_error_t | add_dns_server (const SocketAddress &address, const char *interface_name=NULL) |
Add a domain name server to list of servers to query. More... | |
virtual nsapi_error_t | get_dns_server (int index, SocketAddress *address, const char *interface_name=NULL) |
Get a domain name server from a list of servers to query. More... | |
virtual OnboardNetworkStack * | onboardNetworkStack () |
Dynamic downcast to a OnboardNetworkStack. More... | |
ATHandler & | get_at_handler () |
Getter for at handler. More... | |
device_err_t | get_device_error () const |
Gets the device error that happened when using AT commands/responses. More... | |
Static Public Member Functions | |
static void | set_cellular_properties (const intptr_t *property_array) |
Cellular module need to define an array of cellular properties which defines module supported property values. More... | |
static intptr_t | get_property (CellularProperty key) |
Get value for the given key. More... | |
Protected Member Functions | |
virtual nsapi_error_t | socket_stack_init () |
Modem specific socket stack initialization. More... | |
virtual nsapi_error_t | socket_open (nsapi_socket_t *handle, nsapi_protocol_t proto) |
Note: Socket_open does not actually open socket on all drivers, but that's deferred until calling sendto . More... | |
virtual nsapi_error_t | socket_close (nsapi_socket_t handle) |
Close the socket. More... | |
virtual nsapi_error_t | socket_bind (nsapi_socket_t handle, const SocketAddress &address) |
Bind a specific address to a socket. More... | |
virtual nsapi_error_t | socket_listen (nsapi_socket_t handle, int backlog) |
Listen for connections on a TCP socket. More... | |
virtual nsapi_error_t | socket_connect (nsapi_socket_t handle, const SocketAddress &address) |
Connects TCP socket to a remote host. More... | |
virtual nsapi_error_t | socket_accept (nsapi_socket_t server, nsapi_socket_t *handle, SocketAddress *address=0) |
Accepts a connection on a TCP socket. More... | |
virtual nsapi_size_or_error_t | socket_send (nsapi_socket_t handle, const void *data, nsapi_size_t size) |
Send data over a TCP socket. More... | |
virtual nsapi_size_or_error_t | socket_recv (nsapi_socket_t handle, void *data, nsapi_size_t size) |
Receive data over a TCP socket. More... | |
virtual nsapi_size_or_error_t | socket_sendto (nsapi_socket_t handle, const SocketAddress &address, const void *data, nsapi_size_t size) |
Send a packet over a UDP socket. More... | |
virtual nsapi_size_or_error_t | socket_recvfrom (nsapi_socket_t handle, SocketAddress *address, void *buffer, nsapi_size_t size) |
Receive a packet over a UDP socket. More... | |
virtual void | socket_attach (nsapi_socket_t handle, void(*callback)(void *), void *data) |
Register a callback on state change of the socket. More... | |
virtual int | get_max_socket_count ()=0 |
Gets maximum number of sockets modem supports. More... | |
virtual bool | is_protocol_supported (nsapi_protocol_t protocol)=0 |
Checks if modem supports the given protocol. More... | |
virtual nsapi_error_t | socket_close_impl (int sock_id)=0 |
Implements modem specific AT command set for socket closing. More... | |
virtual nsapi_error_t | create_socket_impl (CellularSocket *socket)=0 |
Implements modem specific AT command set for creating socket. More... | |
virtual nsapi_size_or_error_t | socket_sendto_impl (CellularSocket *socket, const SocketAddress &address, const void *data, nsapi_size_t size)=0 |
Implements modem specific AT command set for sending data. More... | |
virtual nsapi_size_or_error_t | socket_recvfrom_impl (CellularSocket *socket, SocketAddress *address, void *buffer, nsapi_size_t size)=0 |
Implements modem specific AT command set for receiving data. More... | |
CellularSocket * | find_socket (int index) |
Find the socket handle based on the index of the socket construct in the socket container. More... | |
int | find_socket_index (nsapi_socket_t handle) |
Find the index of the given CellularSocket handle. More... | |
bool | is_addr_stack_compatible (const SocketAddress &addr) |
Checks if send to address is valid and if current stack type supports sending to that address type. More... | |
virtual nsapi_error_t | setsockopt (nsapi_socket_t handle, int level, int optname, const void *optval, unsigned optlen) |
Set stack-specific socket options. More... | |
virtual nsapi_error_t | getsockopt (nsapi_socket_t handle, int level, int optname, void *optval, unsigned *optlen) |
Get stack-specific socket options. More... | |
Class AT_CellularStack.
Implements NetworkStack and introduces interface for modem specific stack implementations.
Definition at line 38 of file AT_CellularStack.h.
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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.
status | NSAPI_ERROR_OK on success, negative error code on failure |
address | On success, destination for the host SocketAddress |
Definition at line 111 of file NetworkStack.h.
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virtualinherited |
Add a domain name server to list of servers to query.
address | Destination for the host address |
interface_name | Network interface name |
Implements DNS.
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protectedpure virtual |
Implements modem specific AT command set for creating socket.
socket | Cellular socket handle |
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protected |
Find the socket handle based on the index of the socket construct in the socket container.
Please note that this index may or may not be the socket id. The actual meaning of this index depends upon the modem being used.
index | Index of the socket construct in the container |
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protected |
Find the index of the given CellularSocket handle.
This index may or may not be the socket id. The actual meaning of this index depends upon the modem being used.
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inherited |
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inherited |
Gets the device error that happened when using AT commands/responses.
This is at error returned by the device. Returned CME/CMS errors can be found from 3gpp documents 27007 and 27005.
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virtualinherited |
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.
index | Index of the DNS server, starts from zero |
address | Destination for the host address |
interface_name | Network interface name |
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virtual |
Get the local IP address.
address | SocketAddress representation of the local IP address |
NSAPI_ERROR_OK | on success |
NSAPI_ERROR_UNSUPPORTED | if this feature is not supported |
NSAPI_ERROR_PARAMETER | if the provided pointer is invalid |
NSAPI_ERROR_NO_ADDRESS | if the address cannot be obtained from stack |
Reimplemented from NetworkStack.
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virtualinherited |
Get the local IP address on interface name.
address | SocketAddress representation of the link local IPv6 address |
interface_name | Network interface_name |
NSAPI_ERROR_OK | on success |
NSAPI_ERROR_UNSUPPORTED | if this feature is not supported |
NSAPI_ERROR_PARAMETER | if the provided pointer is invalid |
NSAPI_ERROR_NO_ADDRESS | if the address cannot be obtained from stack |
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virtualinherited |
Get the IPv6 link local address.
address | SocketAddress representation of the link local IPv6 address |
NSAPI_ERROR_OK | on success |
NSAPI_ERROR_UNSUPPORTED | if this feature is not supported |
NSAPI_ERROR_PARAMETER | if the provided pointer is invalid |
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protectedpure virtual |
Gets maximum number of sockets modem supports.
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staticinherited |
Get value for the given key.
key | key for value to be fetched |
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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.
host | Hostname to resolve |
address | Pointer to a SocketAddress to store the result. |
version | IP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC) |
interface_name | Network interface_name |
Implements DNS.
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virtualinherited |
Translates a hostname to an IP address (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.
host | Hostname to resolve |
callback | Callback that is called for result |
version | IP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC) |
interface_name | Network interface_name |
Implements DNS.
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virtualinherited |
Cancels asynchronous hostname translation.
When translation is cancelled, callback will not be called.
id | Unique id of the hostname translation operation |
Implements DNS.
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protectedvirtualinherited |
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.
handle | Socket handle. |
level | Stack-specific protocol level. |
optname | Stack-specific option identifier. |
optval | Destination for option value. |
optlen | Length of the option value. |
Reimplemented in EmacTestNetworkStack, and Nanostack.
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protected |
Checks if send to address is valid and if current stack type supports sending to that address type.
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protectedpure virtual |
Checks if modem supports the given protocol.
protocol | Protocol type |
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virtualinherited |
Dynamic downcast to a OnboardNetworkStack.
Definition at line 200 of file NetworkStack.h.
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staticinherited |
Cellular module need to define an array of cellular properties which defines module supported property values.
property_array | array of module properties |
void set_cid | ( | int | cid | ) |
Set PDP context ID for this stack.
cid | value from AT+CGDCONT, where -1 is undefined |
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protectedvirtualinherited |
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.
handle | Socket handle. |
level | Stack-specific protocol level. |
optname | Stack-specific option identifier. |
optval | Option value. |
optlen | Length of the option value. |
Reimplemented in EmacTestNetworkStack, and Nanostack.
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protectedvirtual |
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.
server | Socket handle to server to accept from |
handle | Destination for a handle to the newly created socket |
address | Destination for the remote address or NULL |
Implements NetworkStack.
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protectedvirtual |
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.
handle | Socket handle |
callback | Function to call on state change |
data | Argument to pass to callback |
Implements NetworkStack.
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protectedvirtual |
Bind a specific address to a socket.
Binding a socket specifies the address and port on which to receive data. If the IP address is zeroed, only the port is bound.
handle | Socket handle |
address | Local address to bind |
Implements NetworkStack.
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protectedvirtual |
Close the socket.
Closes any open connection and deallocates any memory associated with the socket.
handle | Socket handle |
Implements NetworkStack.
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protectedpure virtual |
Implements modem specific AT command set for socket closing.
sock_id | Socket id |
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protectedvirtual |
Connects TCP socket to a remote host.
Initiates a connection to a remote server specified by the indicated address.
handle | Socket handle |
address | The SocketAddress of the remote host |
Implements NetworkStack.
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protectedvirtual |
Listen for connections on a TCP socket.
Marks the socket as a passive socket that can be used to accept incoming connections.
handle | Socket handle |
backlog | Number of pending connections that can be queued simultaneously |
Implements NetworkStack.
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protectedvirtual |
Note: Socket_open does not actually open socket on all drivers, but that's deferred until calling sendto
.
The reason is that IP stack implementations are very much modem specific and it's quite common that when a socket is created (via AT commands) it must also be given remote IP address, and that is usually known only when calling sendto
.
Implements NetworkStack.
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protectedvirtual |
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.
handle | Socket handle |
data | Destination buffer for data received from the host |
size | Size of the buffer in bytes |
Implements NetworkStack.
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protectedvirtual |
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.
handle | Socket handle |
address | Destination for the source address or NULL |
buffer | Destination buffer for data received from the host |
size | Size of the buffer in bytes |
Implements NetworkStack.
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protectedpure virtual |
Implements modem specific AT command set for receiving data.
socket | Socket handle |
address | Destination for the source address or NULL |
buffer | Destination buffer for data received from the host |
size | Size of the buffer in bytes |
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protectedvirtual |
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.
handle | Socket handle |
data | Buffer of data to send to the host |
size | Size of the buffer in bytes |
Implements NetworkStack.
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protectedvirtual |
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.
handle | Socket handle |
address | The SocketAddress of the remote host |
data | Buffer of data to send to the host |
size | Size of the buffer in bytes |
Implements NetworkStack.
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protectedpure virtual |
Implements modem specific AT command set for sending data.
socket | Cellular socket handle |
address | The SocketAddress of the remote host |
data | Buffer of data to send to the host |
size | Size of the buffer in bytes |
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protectedvirtual |
Modem specific socket stack initialization.