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added nonblocking accept/recv to netconn API (task #14396) (also added netconn_recv_udp_raw_netbuf_flags() and netconn_recv_tcp_pbuf_flags() to pass socket-like flags to nonblock for one call only)

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This commit is contained in:
goldsimon 2017-03-02 20:38:11 +01:00
parent 593b211d1b
commit 5c3bb19923
3 changed files with 97 additions and 22 deletions
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3
CHANGELOG
View File

@ -6,6 +6,9 @@ HISTORY
++ New features:
2017-03-02: Simon Goldschmidt
* netconn: added nonblocking accept/recv to netconn API (task #14396)
2017-02-28: Simon Goldschmidt
* Added LWIP_SINGLE_NETIF for small targets with only one netif

84
src/api/api_lib.c
View File

@ -413,6 +413,14 @@ netconn_accept(struct netconn *conn, struct netconn **new_conn)
API_MSG_VAR_ALLOC(msg);
#endif /* TCP_LISTEN_BACKLOG */
if (netconn_is_nonblocking(conn)) {
if (sys_arch_mbox_tryfetch(&conn->acceptmbox, &accept_ptr) == SYS_ARCH_TIMEOUT) {
#if TCP_LISTEN_BACKLOG
API_MSG_VAR_FREE(msg);
#endif /* TCP_LISTEN_BACKLOG */
return ERR_WOULDBLOCK;
}
} else {
#if LWIP_SO_RCVTIMEO
if (sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
#if TCP_LISTEN_BACKLOG
@ -423,6 +431,7 @@ netconn_accept(struct netconn *conn, struct netconn **new_conn)
#else
sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, 0);
#endif /* LWIP_SO_RCVTIMEO*/
}
newconn = (struct netconn *)accept_ptr;
/* Register event with callback */
API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0);
@ -467,15 +476,21 @@ netconn_accept(struct netconn *conn, struct netconn **new_conn)
/**
* @ingroup netconn_common
* Receive data: actual implementation that doesn't care whether pbuf or netbuf
* is received
* is received (this is internal, it's just here for describing common errors)
*
* @param conn the netconn from which to receive data
* @param new_buf pointer where a new pbuf/netbuf is stored when received data
* @param apiflags flags that control function behaviour. For now only:
* - NETCONN_DONTBLOCK: only read data that is available now, don't wait for more data
* @return ERR_OK if data has been received, an error code otherwise (timeout,
* memory error or another error)
* ERR_CONN if not connected
* ERR_CLSD if TCP connection has been closed
* ERR_WOULDBLOCK if the netconn is nonblocking but would block to wait for data
* ERR_TIMEOUT if the netconn has a receive timeout and no data was received
*/
static err_t
netconn_recv_data(struct netconn *conn, void **new_buf)
netconn_recv_data(struct netconn *conn, void **new_buf, u8_t apiflags)
{
void *buf = NULL;
u16_t len;
@ -520,6 +535,19 @@ netconn_recv_data(struct netconn *conn, void **new_buf)
}
#endif /* LWIP_TCP */
if (netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK)) {
if (sys_arch_mbox_tryfetch(&conn->recvmbox, &buf) == SYS_ARCH_TIMEOUT) {
#if LWIP_TCP
#if (LWIP_UDP || LWIP_RAW)
if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP)
#endif /* (LWIP_UDP || LWIP_RAW) */
{
API_MSG_VAR_FREE(msg);
}
#endif /* LWIP_TCP */
return ERR_WOULDBLOCK;
}
} else {
#if LWIP_SO_RCVTIMEO
if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
#if LWIP_TCP
@ -535,6 +563,7 @@ netconn_recv_data(struct netconn *conn, void **new_buf)
#else
sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0);
#endif /* LWIP_SO_RCVTIMEO*/
}
#if LWIP_TCP
#if (LWIP_UDP || LWIP_RAW)
@ -600,7 +629,7 @@ netconn_recv_data(struct netconn *conn, void **new_buf)
* @param conn the netconn from which to receive data
* @param new_buf pointer where a new pbuf is stored when received data
* @return ERR_OK if data has been received, an error code otherwise (timeout,
* memory error or another error)
* memory error or another error, @see netconn_recv_data)
* ERR_ARG if conn is not a TCP netconn
*/
err_t
@ -609,7 +638,28 @@ netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf)
LWIP_ERROR("netconn_recv_tcp_pbuf: invalid conn", (conn != NULL) &&
NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;);
return netconn_recv_data(conn, (void **)new_buf);
return netconn_recv_data(conn, (void **)new_buf, 0);
}
/**
* @ingroup netconn_tcp
* Receive data (in form of a pbuf) from a TCP netconn
*
* @param conn the netconn from which to receive data
* @param new_buf pointer where a new pbuf is stored when received data
* @param apiflags flags that control function behaviour. For now only:
* - NETCONN_DONTBLOCK: only read data that is available now, don't wait for more data
* @return ERR_OK if data has been received, an error code otherwise (timeout,
* memory error or another error, @see netconn_recv_data)
* ERR_ARG if conn is not a TCP netconn
*/
err_t
netconn_recv_tcp_pbuf_flags(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags)
{
LWIP_ERROR("netconn_recv_tcp_pbuf: invalid conn", (conn != NULL) &&
NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;);
return netconn_recv_data(conn, (void **)new_buf, apiflags);
}
/**
@ -627,7 +677,27 @@ netconn_recv_udp_raw_netbuf(struct netconn *conn, struct netbuf **new_buf)
LWIP_ERROR("netconn_recv_udp_raw_netbuf: invalid conn", (conn != NULL) &&
NETCONNTYPE_GROUP(netconn_type(conn)) != NETCONN_TCP, return ERR_ARG;);
return netconn_recv_data(conn, (void **)new_buf);
return netconn_recv_data(conn, (void **)new_buf, 0);
}
/**
* Receive data (in form of a netbuf) from a UDP or RAW netconn
*
* @param conn the netconn from which to receive data
* @param new_buf pointer where a new netbuf is stored when received data
* @param apiflags flags that control function behaviour. For now only:
* - NETCONN_DONTBLOCK: only read data that is available now, don't wait for more data
* @return ERR_OK if data has been received, an error code otherwise (timeout,
* memory error or another error)
* ERR_ARG if conn is not a UDP/RAW netconn
*/
err_t
netconn_recv_udp_raw_netbuf_flags(struct netconn *conn, struct netbuf **new_buf, u8_t apiflags)
{
LWIP_ERROR("netconn_recv_udp_raw_netbuf: invalid conn", (conn != NULL) &&
NETCONNTYPE_GROUP(netconn_type(conn)) != NETCONN_TCP, return ERR_ARG;);
return netconn_recv_data(conn, (void **)new_buf, apiflags);
}
/**
@ -664,7 +734,7 @@ netconn_recv(struct netconn *conn, struct netbuf **new_buf)
return ERR_MEM;
}
err = netconn_recv_data(conn, (void **)&p);
err = netconn_recv_data(conn, (void **)&p, 0);
if (err != ERR_OK) {
memp_free(MEMP_NETBUF, buf);
return err;
@ -685,7 +755,7 @@ netconn_recv(struct netconn *conn, struct netbuf **new_buf)
#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */
{
#if (LWIP_UDP || LWIP_RAW)
return netconn_recv_data(conn, (void **)new_buf);
return netconn_recv_data(conn, (void **)new_buf, 0);
#endif /* (LWIP_UDP || LWIP_RAW) */
}
}

2
src/include/lwip/api.h
View File

@ -311,7 +311,9 @@ err_t netconn_listen_with_backlog(struct netconn *conn, u8_t backlog);
err_t netconn_accept(struct netconn *conn, struct netconn **new_conn);
err_t netconn_recv(struct netconn *conn, struct netbuf **new_buf);
err_t netconn_recv_udp_raw_netbuf(struct netconn *conn, struct netbuf **new_buf);
err_t netconn_recv_udp_raw_netbuf_flags(struct netconn *conn, struct netbuf **new_buf, u8_t apiflags);
err_t netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf);
err_t netconn_recv_tcp_pbuf_flags(struct netconn *conn, struct pbuf **new_buf, u8_t apiflags);
err_t netconn_sendto(struct netconn *conn, struct netbuf *buf,
const ip_addr_t *addr, u16_t port);
err_t netconn_send(struct netconn *conn, struct netbuf *buf);