mbed unsupported / lwip

A version of LWIP, provided for backwards compatibility.

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sockets.c File Reference
Functions | Variables

sockets.c File Reference

Sockets BSD-Like API module. More...

Go to the source code of this file.

Functions

static void event_callback (struct netconn *conn, enum netconn_evt evt, u16_t len)
 Callback registered in the netconn layer for each socket-netconn.
void lwip_socket_init (void)
 Initialize this module.
static struct lwip_socket * get_socket (int s)
 Map a externally used socket index to the internal socket representation.
static int alloc_socket (struct netconn *newconn)
 Allocate a new socket for a given netconn.
int lwip_listen (int s, int backlog)
 Set a socket into listen mode.
static int lwip_selscan (int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset)
 Go through the readset and writeset lists and see which socket of the sockets set in the sets has events.
int lwip_select (int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, struct timeval *timeout)
 Processing exceptset is not yet implemented.
int lwip_shutdown (int s, int how)
 Unimplemented: Close one end of a full-duplex connection.

Variables

static struct lwip_socket sockets [NUM_SOCKETS]
 The global array of available sockets.
static struct lwip_select_cb * select_cb_list
 The global list of tasks waiting for select.
static sys_sem_t socksem
 Semaphore protecting the sockets array.
static sys_sem_t selectsem
 Semaphore protecting select_cb_list.
static const int err_to_errno_table []
 Table to quickly map an lwIP error (err_t) to a socket error by using -err as an index.

Detailed Description

Sockets BSD-Like API module.

Definition in file 0.5/lwIP/api/sockets.c.

Function Documentation

static int alloc_socket ( struct netconn *  newconn ) [static]

Allocate a new socket for a given netconn.

Parameters:
newconnthe netconn for which to allocate a socket
Returns:
the index of the new socket; -1 on error

Definition at line 214 of file 0.5/lwIP/api/sockets.c.

static void event_callback ( struct netconn *  conn,
enum netconn_evt  evt,
u16_t  len 
) [static]

Callback registered in the netconn layer for each socket-netconn.

Processes recvevent (data available) and wakes up tasks waiting for select.

Definition at line 995 of file 0.5/lwIP/api/sockets.c.

static struct lwip_socket* get_socket ( int  s ) [static, read]

Map a externally used socket index to the internal socket representation.

Parameters:
sexternally used socket index
Returns:
struct lwip_socket for the socket or NULL if not found

Definition at line 186 of file 0.5/lwIP/api/sockets.c.

int lwip_listen ( int  s,
int  backlog 
)

Set a socket into listen mode.

The socket may not have been used for another connection previously.

Parameters:
sthe socket to set to listening mode
backlog(ATTENTION: need TCP_LISTEN_BACKLOG=1)
Returns:
0 on success, non-zero on failure

Definition at line 429 of file 0.5/lwIP/api/sockets.c.

int lwip_select ( int  maxfdp1,
fd_set *  readset,
fd_set *  writeset,
fd_set *  exceptset,
struct timeval *  timeout 
)

Processing exceptset is not yet implemented.

Definition at line 846 of file 0.5/lwIP/api/sockets.c.

static int lwip_selscan ( int  maxfdp1,
fd_set *  readset,
fd_set *  writeset,
fd_set *  exceptset 
) [static]

Go through the readset and writeset lists and see which socket of the sockets set in the sets has events.

On return, readset, writeset and exceptset have the sockets enabled that had events.

exceptset is not used for now!!!

Parameters:
maxfdp1the highest socket index in the sets
readsetin: set of sockets to check for read events; out: set of sockets that had read events
writesetin: set of sockets to check for write events; out: set of sockets that had write events
exceptsetnot yet implemented
Returns:
number of sockets that had events (read+write)

Definition at line 802 of file 0.5/lwIP/api/sockets.c.

int lwip_shutdown ( int  s,
int  how 
)

Unimplemented: Close one end of a full-duplex connection.

Currently, the full connection is closed.

Definition at line 1088 of file 0.5/lwIP/api/sockets.c.

void lwip_socket_init ( void   )

Initialize this module.

This function has to be called before any other functions in this module!

Definition at line 173 of file 0.5/lwIP/api/sockets.c.

Variable Documentation

const int err_to_errno_table[] [static]
Initial value:
 {
  0,             
  ENOMEM,        
  ENOBUFS,       
  EHOSTUNREACH,  
  ECONNABORTED,  
  ECONNRESET,    
  ESHUTDOWN,     
  ENOTCONN,      
  EINVAL,        
  EIO,           
  EADDRINUSE,    
  -1,            
  -1,            
  ETIMEDOUT,     
  EINPROGRESS    
}

Table to quickly map an lwIP error (err_t) to a socket error by using -err as an index.

Definition at line 127 of file 0.5/lwIP/api/sockets.c.

struct lwip_select_cb* select_cb_list [static]

The global list of tasks waiting for select.

Definition at line 118 of file 0.5/lwIP/api/sockets.c.

sys_sem_t selectsem [static]

Semaphore protecting select_cb_list.

Definition at line 123 of file 0.5/lwIP/api/sockets.c.

struct lwip_socket sockets[NUM_SOCKETS] [static]

The global array of available sockets.

Definition at line 116 of file 0.5/lwIP/api/sockets.c.

sys_sem_t socksem [static]

Semaphore protecting the sockets array.

Definition at line 121 of file 0.5/lwIP/api/sockets.c.

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