otp_socket.h

Include dependency graph for otp_socket.h:

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This graph shows which files directly or indirectly include otp_socket.h:

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Enums

enum SocketErrors

Values:

enumerator SocketClosed = 0
enumerator SocketWouldBlock = -1
enumerator SocketOtherError = -2

Functions

const struct Nif *otp_socket_nif_get_nif(const char *nifname)
void otp_socket_init(GlobalContext *global)
bool term_to_otp_socket(term socket_term, struct SocketResource **otp_socket, Context *ctx)

Get the resource object associated with a socket term.

Parameters:
  • socket_term – the term with the socket

  • otp_socket – on output, the socket resource

  • ctx – the current context

Returns:

true in case of success

bool term_is_otp_socket(term socket_term)

Determine if a term is a socket term.

Parameters:
  • socket_term – the term to test

Returns:

true if it is a term

ssize_t socket_send(struct SocketResource *socket, const uint8_t *buf, size_t len, term dest)

Send data to a socket (without blocking)

Parameters:
  • socket – the socket resource

  • buf – buffer to send

  • len – number of bytes

  • dest – destination address or invalid term for sendto/send

Returns:

the number of written bytes or a value from SocketErrors

ssize_t socket_recv(struct SocketResource *socket, uint8_t *buf, size_t len, int flags, term *from, Heap *heap)

Read data from a socket.

Parameters:
  • socket – the socket resource

  • buf – buffer to store data

  • len – number of bytes

  • flags – flags passed to recvfrom

  • from – filled with origin address using recvfrom (can be NULL)

  • heap – heap to build the origin address term (can be NULL if from is NULL)

Returns:

the number of read bytes or a value from SocketErrors

void otp_socket_lwip_enqueue(struct LWIPEvent *event)

Enqueue an event to be processed in task context.

This function must be implemented in otp_socket_platform.c. Platforms using lwIP implementation may have lwIP callbacks coming from ISR and in such case need to implement a queue mechanism to process them in task context. GlobalContext is not always available in lwIP callbacks so platforms using a queue need a global variable. If lwIP callbacks are not called from ISR, calling handler with the event is sufficient.

Parameters:
  • event – the event to enqueue

struct LWIPEvent
#include <otp_socket.h>

Collaboration diagram for LWIPEvent:

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Public Members

void (*handler)(struct LWIPEvent *event)
struct SocketResource *rsrc_obj
struct tcp_pcb *newpcb
struct LWIPEvent.[anonymous].[anonymous] tcp_accept
struct tcp_pcb *tpcb
struct pbuf *buf
err_t err
struct LWIPEvent.[anonymous].[anonymous] tcp_recv
uint32_t addr
uint16_t port
struct LWIPEvent.[anonymous].[anonymous] udp_recv
GlobalContext *global
int32_t target_pid
struct LWIPEvent.[anonymous].[anonymous] trap_answer_ok
struct LWIPEvent.[anonymous].[anonymous] trap_answer_closed
struct LWIPEvent.[anonymous].[anonymous] finalize_close
void *callback_arg
bool success
struct LWIPEvent.[anonymous].[anonymous] dns_gethostbyname
union LWIPEvent.[anonymous] [anonymous]