diff options
Diffstat (limited to 'ext/lwip/src/api/api_lib.c')
| -rw-r--r-- | ext/lwip/src/api/api_lib.c | 780 |
1 files changed, 0 insertions, 780 deletions
diff --git a/ext/lwip/src/api/api_lib.c b/ext/lwip/src/api/api_lib.c deleted file mode 100644 index 4bdf08ed..00000000 --- a/ext/lwip/src/api/api_lib.c +++ /dev/null @@ -1,780 +0,0 @@ -/** - * @file - * Sequential API External module - * - */ - -/* - * Copyright (c) 2001-2004 Swedish Institute of Computer Science. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without modification, - * are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT - * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT - * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING - * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY - * OF SUCH DAMAGE. - * - * This file is part of the lwIP TCP/IP stack. - * - * Author: Adam Dunkels <adam@sics.se> - * - */ - -/* This is the part of the API that is linked with - the application */ - -#include "lwip/opt.h" - -#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ - -#include "lwip/api.h" -#include "lwip/tcpip.h" -#include "lwip/memp.h" - -#include "lwip/ip.h" -#include "lwip/raw.h" -#include "lwip/udp.h" -#include "lwip/tcp.h" - -#include <string.h> - -/** - * Create a new netconn (of a specific type) that has a callback function. - * The corresponding pcb is also created. - * - * @param t the type of 'connection' to create (@see enum netconn_type) - * @param proto the IP protocol for RAW IP pcbs - * @param callback a function to call on status changes (RX available, TX'ed) - * @return a newly allocated struct netconn or - * NULL on memory error - */ -struct netconn* -netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, netconn_callback callback) -{ - struct netconn *conn; - struct api_msg msg; - - conn = netconn_alloc(t, callback); - if (conn != NULL) { - msg.function = do_newconn; - msg.msg.msg.n.proto = proto; - msg.msg.conn = conn; - if (TCPIP_APIMSG(&msg) != ERR_OK) { - LWIP_ASSERT("freeing conn without freeing pcb", conn->pcb.tcp == NULL); - LWIP_ASSERT("conn has no op_completed", sys_sem_valid(&conn->op_completed)); - LWIP_ASSERT("conn has no recvmbox", sys_mbox_valid(&conn->recvmbox)); -#if LWIP_TCP - LWIP_ASSERT("conn->acceptmbox shouldn't exist", !sys_mbox_valid(&conn->acceptmbox)); -#endif /* LWIP_TCP */ - sys_sem_free(&conn->op_completed); - sys_mbox_free(&conn->recvmbox); - memp_free(MEMP_NETCONN, conn); - return NULL; - } - } - return conn; -} - -/** - * Close a netconn 'connection' and free its resources. - * UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate - * after this returns. - * - * @param conn the netconn to delete - * @return ERR_OK if the connection was deleted - */ -err_t -netconn_delete(struct netconn *conn) -{ - struct api_msg msg; - - /* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */ - if (conn == NULL) { - return ERR_OK; - } - - msg.function = do_delconn; - msg.msg.conn = conn; - tcpip_apimsg(&msg); - - netconn_free(conn); - - /* don't care for return value of do_delconn since it only calls void functions */ - - return ERR_OK; -} - -/** - * Get the local or remote IP address and port of a netconn. - * For RAW netconns, this returns the protocol instead of a port! - * - * @param conn the netconn to query - * @param addr a pointer to which to save the IP address - * @param port a pointer to which to save the port (or protocol for RAW) - * @param local 1 to get the local IP address, 0 to get the remote one - * @return ERR_CONN for invalid connections - * ERR_OK if the information was retrieved - */ -err_t -netconn_getaddr(struct netconn *conn, ip_addr_t *addr, u16_t *port, u8_t local) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_getaddr: invalid conn", (conn != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_getaddr: invalid addr", (addr != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_getaddr: invalid port", (port != NULL), return ERR_ARG;); - - msg.function = do_getaddr; - msg.msg.conn = conn; - msg.msg.msg.ad.ipaddr = addr; - msg.msg.msg.ad.port = port; - msg.msg.msg.ad.local = local; - err = TCPIP_APIMSG(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Bind a netconn to a specific local IP address and port. - * Binding one netconn twice might not always be checked correctly! - * - * @param conn the netconn to bind - * @param addr the local IP address to bind the netconn to (use IP_ADDR_ANY - * to bind to all addresses) - * @param port the local port to bind the netconn to (not used for RAW) - * @return ERR_OK if bound, any other err_t on failure - */ -err_t -netconn_bind(struct netconn *conn, ip_addr_t *addr, u16_t port) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_bind: invalid conn", (conn != NULL), return ERR_ARG;); - - msg.function = do_bind; - msg.msg.conn = conn; - msg.msg.msg.bc.ipaddr = addr; - msg.msg.msg.bc.port = port; - err = TCPIP_APIMSG(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Connect a netconn to a specific remote IP address and port. - * - * @param conn the netconn to connect - * @param addr the remote IP address to connect to - * @param port the remote port to connect to (no used for RAW) - * @return ERR_OK if connected, return value of tcp_/udp_/raw_connect otherwise - */ -err_t -netconn_connect(struct netconn *conn, ip_addr_t *addr, u16_t port) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_connect: invalid conn", (conn != NULL), return ERR_ARG;); - - msg.function = do_connect; - msg.msg.conn = conn; - msg.msg.msg.bc.ipaddr = addr; - msg.msg.msg.bc.port = port; - /* This is the only function which need to not block tcpip_thread */ - err = tcpip_apimsg(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Disconnect a netconn from its current peer (only valid for UDP netconns). - * - * @param conn the netconn to disconnect - * @return TODO: return value is not set here... - */ -err_t -netconn_disconnect(struct netconn *conn) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_disconnect: invalid conn", (conn != NULL), return ERR_ARG;); - - msg.function = do_disconnect; - msg.msg.conn = conn; - err = TCPIP_APIMSG(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Set a TCP netconn into listen mode - * - * @param conn the tcp netconn to set to listen mode - * @param backlog the listen backlog, only used if TCP_LISTEN_BACKLOG==1 - * @return ERR_OK if the netconn was set to listen (UDP and RAW netconns - * don't return any error (yet?)) - */ -err_t -netconn_listen_with_backlog(struct netconn *conn, u8_t backlog) -{ -#if LWIP_TCP - struct api_msg msg; - err_t err; - - /* This does no harm. If TCP_LISTEN_BACKLOG is off, backlog is unused. */ - LWIP_UNUSED_ARG(backlog); - - LWIP_ERROR("netconn_listen: invalid conn", (conn != NULL), return ERR_ARG;); - - msg.function = do_listen; - msg.msg.conn = conn; -#if TCP_LISTEN_BACKLOG - msg.msg.msg.lb.backlog = backlog; -#endif /* TCP_LISTEN_BACKLOG */ - err = TCPIP_APIMSG(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -#else /* LWIP_TCP */ - LWIP_UNUSED_ARG(conn); - LWIP_UNUSED_ARG(backlog); - return ERR_ARG; -#endif /* LWIP_TCP */ -} - -/** - * Accept a new connection on a TCP listening netconn. - * - * @param conn the TCP listen netconn - * @param new_conn pointer where the new connection is stored - * @return ERR_OK if a new connection has been received or an error - * code otherwise - */ -err_t -netconn_accept(struct netconn *conn, struct netconn **new_conn) -{ -#if LWIP_TCP - struct netconn *newconn; - err_t err; -#if TCP_LISTEN_BACKLOG - struct api_msg msg; -#endif /* TCP_LISTEN_BACKLOG */ - - LWIP_ERROR("netconn_accept: invalid pointer", (new_conn != NULL), return ERR_ARG;); - *new_conn = NULL; - LWIP_ERROR("netconn_accept: invalid conn", (conn != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_accept: invalid acceptmbox", sys_mbox_valid(&conn->acceptmbox), return ERR_ARG;); - - err = conn->last_err; - if (ERR_IS_FATAL(err)) { - /* don't recv on fatal errors: this might block the application task - waiting on acceptmbox forever! */ - return err; - } - -#if LWIP_SO_RCVTIMEO - if (sys_arch_mbox_fetch(&conn->acceptmbox, (void **)&newconn, conn->recv_timeout) == SYS_ARCH_TIMEOUT) { - NETCONN_SET_SAFE_ERR(conn, ERR_TIMEOUT); - return ERR_TIMEOUT; - } -#else - sys_arch_mbox_fetch(&conn->acceptmbox, (void **)&newconn, 0); -#endif /* LWIP_SO_RCVTIMEO*/ - /* Register event with callback */ - API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0); - - if (newconn == NULL) { - /* connection has been aborted */ - NETCONN_SET_SAFE_ERR(conn, ERR_ABRT); - return ERR_ABRT; - } -#if TCP_LISTEN_BACKLOG - /* Let the stack know that we have accepted the connection. */ - msg.function = do_recv; - msg.msg.conn = conn; - /* don't care for the return value of do_recv */ - TCPIP_APIMSG(&msg); -#endif /* TCP_LISTEN_BACKLOG */ - - *new_conn = newconn; - /* don't set conn->last_err: it's only ERR_OK, anyway */ - return ERR_OK; -#else /* LWIP_TCP */ - LWIP_UNUSED_ARG(conn); - LWIP_UNUSED_ARG(new_conn); - return ERR_ARG; -#endif /* LWIP_TCP */ -} - -/** - * Receive data: actual implementation that doesn't care whether pbuf or netbuf - * is received - * - * @param conn the netconn from which to receive data - * @param new_buf pointer where a new pbuf/netbuf is stored when received data - * @return ERR_OK if data has been received, an error code otherwise (timeout, - * memory error or another error) - */ -static err_t -netconn_recv_data(struct netconn *conn, void **new_buf) -{ - void *buf = NULL; - u16_t len; - err_t err; -#if LWIP_TCP - struct api_msg msg; -#endif /* LWIP_TCP */ - - LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;); - *new_buf = NULL; - LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_accept: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;); - - err = conn->last_err; - if (ERR_IS_FATAL(err)) { - /* don't recv on fatal errors: this might block the application task - waiting on recvmbox forever! */ - /* @todo: this does not allow us to fetch data that has been put into recvmbox - before the fatal error occurred - is that a problem? */ - return err; - } - -#if LWIP_SO_RCVTIMEO - if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) { - NETCONN_SET_SAFE_ERR(conn, ERR_TIMEOUT); - return ERR_TIMEOUT; - } -#else - sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0); -#endif /* LWIP_SO_RCVTIMEO*/ - -#if LWIP_TCP -#if (LWIP_UDP || LWIP_RAW) - if (conn->type == NETCONN_TCP) -#endif /* (LWIP_UDP || LWIP_RAW) */ - { - if (!netconn_get_noautorecved(conn) || (buf == NULL)) { - /* Let the stack know that we have taken the data. */ - /* TODO: Speedup: Don't block and wait for the answer here - (to prevent multiple thread-switches). */ - msg.function = do_recv; - msg.msg.conn = conn; - if (buf != NULL) { - msg.msg.msg.r.len = ((struct pbuf *)buf)->tot_len; - } else { - msg.msg.msg.r.len = 1; - } - /* don't care for the return value of do_recv */ - TCPIP_APIMSG(&msg); - } - - /* If we are closed, we indicate that we no longer wish to use the socket */ - if (buf == NULL) { - API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0); - /* Avoid to lose any previous error code */ - NETCONN_SET_SAFE_ERR(conn, ERR_CLSD); - return ERR_CLSD; - } - len = ((struct pbuf *)buf)->tot_len; - } -#endif /* LWIP_TCP */ -#if LWIP_TCP && (LWIP_UDP || LWIP_RAW) - else -#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */ -#if (LWIP_UDP || LWIP_RAW) - { - LWIP_ASSERT("buf != NULL", buf != NULL); - len = netbuf_len((struct netbuf *)buf); - } -#endif /* (LWIP_UDP || LWIP_RAW) */ - -#if LWIP_SO_RCVBUF - SYS_ARCH_DEC(conn->recv_avail, len); -#endif /* LWIP_SO_RCVBUF */ - /* Register event with callback */ - API_EVENT(conn, NETCONN_EVT_RCVMINUS, len); - - LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv_data: received %p, len=%"U16_F"\n", buf, len)); - - *new_buf = buf; - /* don't set conn->last_err: it's only ERR_OK, anyway */ - return ERR_OK; -} - -/** - * 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 - * @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 TCP netconn - */ -err_t -netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf) -{ - LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL) && - netconn_type(conn) == NETCONN_TCP, return ERR_ARG;); - - return netconn_recv_data(conn, (void **)new_buf); -} - -/** - * Receive data (in form of a netbuf containing a packet buffer) from a netconn - * - * @param conn the netconn from which to receive data - * @param new_buf pointer where a new netbuf is stored when received data - * @return ERR_OK if data has been received, an error code otherwise (timeout, - * memory error or another error) - */ -err_t -netconn_recv(struct netconn *conn, struct netbuf **new_buf) -{ -#if LWIP_TCP - struct netbuf *buf = NULL; - err_t err; -#endif /* LWIP_TCP */ - - LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;); - *new_buf = NULL; - LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_accept: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;); - -#if LWIP_TCP -#if (LWIP_UDP || LWIP_RAW) - if (conn->type == NETCONN_TCP) -#endif /* (LWIP_UDP || LWIP_RAW) */ - { - struct pbuf *p = NULL; - /* This is not a listening netconn, since recvmbox is set */ - - buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); - if (buf == NULL) { - NETCONN_SET_SAFE_ERR(conn, ERR_MEM); - return ERR_MEM; - } - - err = netconn_recv_data(conn, (void **)&p); - if (err != ERR_OK) { - memp_free(MEMP_NETBUF, buf); - return err; - } - LWIP_ASSERT("p != NULL", p != NULL); - - buf->p = p; - buf->ptr = p; - buf->port = 0; - ip_addr_set_any(&buf->addr); - *new_buf = buf; - /* don't set conn->last_err: it's only ERR_OK, anyway */ - return ERR_OK; - } -#endif /* LWIP_TCP */ -#if LWIP_TCP && (LWIP_UDP || LWIP_RAW) - else -#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */ - { -#if (LWIP_UDP || LWIP_RAW) - return netconn_recv_data(conn, (void **)new_buf); -#endif /* (LWIP_UDP || LWIP_RAW) */ - } -} - -/** - * TCP: update the receive window: by calling this, the application - * tells the stack that it has processed data and is able to accept - * new data. - * ATTENTION: use with care, this is mainly used for sockets! - * Can only be used when calling netconn_set_noautorecved(conn, 1) before. - * - * @param conn the netconn for which to update the receive window - * @param length amount of data processed (ATTENTION: this must be accurate!) - */ -void -netconn_recved(struct netconn *conn, u32_t length) -{ -#if LWIP_TCP - if ((conn != NULL) && (conn->type == NETCONN_TCP) && - (netconn_get_noautorecved(conn))) { - struct api_msg msg; - /* Let the stack know that we have taken the data. */ - /* TODO: Speedup: Don't block and wait for the answer here - (to prevent multiple thread-switches). */ - msg.function = do_recv; - msg.msg.conn = conn; - msg.msg.msg.r.len = length; - /* don't care for the return value of do_recv */ - TCPIP_APIMSG(&msg); - } -#else /* LWIP_TCP */ - LWIP_UNUSED_ARG(conn); - LWIP_UNUSED_ARG(length); -#endif /* LWIP_TCP */ -} - -/** - * Send data (in form of a netbuf) to a specific remote IP address and port. - * Only to be used for UDP and RAW netconns (not TCP). - * - * @param conn the netconn over which to send data - * @param buf a netbuf containing the data to send - * @param addr the remote IP address to which to send the data - * @param port the remote port to which to send the data - * @return ERR_OK if data was sent, any other err_t on error - */ -err_t -netconn_sendto(struct netconn *conn, struct netbuf *buf, ip_addr_t *addr, u16_t port) -{ - if (buf != NULL) { - ip_addr_set(&buf->addr, addr); - buf->port = port; - return netconn_send(conn, buf); - } - return ERR_VAL; -} - -/** - * Send data over a UDP or RAW netconn (that is already connected). - * - * @param conn the UDP or RAW netconn over which to send data - * @param buf a netbuf containing the data to send - * @return ERR_OK if data was sent, any other err_t on error - */ -err_t -netconn_send(struct netconn *conn, struct netbuf *buf) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_send: invalid conn", (conn != NULL), return ERR_ARG;); - - LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %"U16_F" bytes\n", buf->p->tot_len)); - msg.function = do_send; - msg.msg.conn = conn; - msg.msg.msg.b = buf; - err = TCPIP_APIMSG(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Send data over a TCP netconn. - * - * @param conn the TCP netconn over which to send data - * @param dataptr pointer to the application buffer that contains the data to send - * @param size size of the application data to send - * @param apiflags combination of following flags : - * - NETCONN_COPY: data will be copied into memory belonging to the stack - * - NETCONN_MORE: for TCP connection, PSH flag will be set on last segment sent - * - NETCONN_DONTBLOCK: only write the data if all dat can be written at once - * @param bytes_written pointer to a location that receives the number of written bytes - * @return ERR_OK if data was sent, any other err_t on error - */ -err_t -netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size, - u8_t apiflags, size_t *bytes_written) -{ - struct api_msg msg; - err_t err; - u8_t dontblock; - - LWIP_ERROR("netconn_write: invalid conn", (conn != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_write: invalid conn->type", (conn->type == NETCONN_TCP), return ERR_VAL;); - if (size == 0) { - return ERR_OK; - } - dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK); - if (dontblock && !bytes_written) { - /* This implies netconn_write() cannot be used for non-blocking send, since - it has no way to return the number of bytes written. */ - return ERR_VAL; - } - - /* non-blocking write sends as much */ - msg.function = do_write; - msg.msg.conn = conn; - msg.msg.msg.w.dataptr = dataptr; - msg.msg.msg.w.apiflags = apiflags; - msg.msg.msg.w.len = size; -#if LWIP_SO_SNDTIMEO - if (conn->send_timeout != 0) { - /* get the time we started, which is later compared to - sys_now() + conn->send_timeout */ - msg.msg.msg.w.time_started = sys_now(); - } else { - msg.msg.msg.w.time_started = 0; - } -#endif /* LWIP_SO_SNDTIMEO */ - - /* For locking the core: this _can_ be delayed on low memory/low send buffer, - but if it is, this is done inside api_msg.c:do_write(), so we can use the - non-blocking version here. */ - err = TCPIP_APIMSG(&msg); - if ((err == ERR_OK) && (bytes_written != NULL)) { - if (dontblock -#if LWIP_SO_SNDTIMEO - || (conn->send_timeout != 0) -#endif /* LWIP_SO_SNDTIMEO */ - ) { - /* nonblocking write: maybe the data has been sent partly */ - *bytes_written = msg.msg.msg.w.len; - } else { - /* blocking call succeeded: all data has been sent if it */ - *bytes_written = size; - } - } - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Close ot shutdown a TCP netconn (doesn't delete it). - * - * @param conn the TCP netconn to close or shutdown - * @param how fully close or only shutdown one side? - * @return ERR_OK if the netconn was closed, any other err_t on error - */ -static err_t -netconn_close_shutdown(struct netconn *conn, u8_t how) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_close: invalid conn", (conn != NULL), return ERR_ARG;); - - msg.function = do_close; - msg.msg.conn = conn; - /* shutting down both ends is the same as closing */ - msg.msg.msg.sd.shut = how; - /* because of the LWIP_TCPIP_CORE_LOCKING implementation of do_close, - don't use TCPIP_APIMSG here */ - err = tcpip_apimsg(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} - -/** - * Close a TCP netconn (doesn't delete it). - * - * @param conn the TCP netconn to close - * @return ERR_OK if the netconn was closed, any other err_t on error - */ -err_t -netconn_close(struct netconn *conn) -{ - /* shutting down both ends is the same as closing */ - return netconn_close_shutdown(conn, NETCONN_SHUT_RDWR); -} - -/** - * Shut down one or both sides of a TCP netconn (doesn't delete it). - * - * @param conn the TCP netconn to shut down - * @return ERR_OK if the netconn was closed, any other err_t on error - */ -err_t -netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx) -{ - return netconn_close_shutdown(conn, (shut_rx ? NETCONN_SHUT_RD : 0) | (shut_tx ? NETCONN_SHUT_WR : 0)); -} - -#if LWIP_IGMP -/** - * Join multicast groups for UDP netconns. - * - * @param conn the UDP netconn for which to change multicast addresses - * @param multiaddr IP address of the multicast group to join or leave - * @param netif_addr the IP address of the network interface on which to send - * the igmp message - * @param join_or_leave flag whether to send a join- or leave-message - * @return ERR_OK if the action was taken, any err_t on error - */ -err_t -netconn_join_leave_group(struct netconn *conn, - ip_addr_t *multiaddr, - ip_addr_t *netif_addr, - enum netconn_igmp join_or_leave) -{ - struct api_msg msg; - err_t err; - - LWIP_ERROR("netconn_join_leave_group: invalid conn", (conn != NULL), return ERR_ARG;); - - msg.function = do_join_leave_group; - msg.msg.conn = conn; - msg.msg.msg.jl.multiaddr = multiaddr; - msg.msg.msg.jl.netif_addr = netif_addr; - msg.msg.msg.jl.join_or_leave = join_or_leave; - err = TCPIP_APIMSG(&msg); - - NETCONN_SET_SAFE_ERR(conn, err); - return err; -} -#endif /* LWIP_IGMP */ - -#if LWIP_DNS -/** - * Execute a DNS query, only one IP address is returned - * - * @param name a string representation of the DNS host name to query - * @param addr a preallocated ip_addr_t where to store the resolved IP address - * @return ERR_OK: resolving succeeded - * ERR_MEM: memory error, try again later - * ERR_ARG: dns client not initialized or invalid hostname - * ERR_VAL: dns server response was invalid - */ -err_t -netconn_gethostbyname(const char *name, ip_addr_t *addr) -{ - struct dns_api_msg msg; - err_t err; - sys_sem_t sem; - - LWIP_ERROR("netconn_gethostbyname: invalid name", (name != NULL), return ERR_ARG;); - LWIP_ERROR("netconn_gethostbyname: invalid addr", (addr != NULL), return ERR_ARG;); - - err = sys_sem_new(&sem, 0); - if (err != ERR_OK) { - return err; - } - - msg.name = name; - msg.addr = addr; - msg.err = &err; - msg.sem = &sem; - - tcpip_callback(do_gethostbyname, &msg); - sys_sem_wait(&sem); - sys_sem_free(&sem); - - return err; -} -#endif /* LWIP_DNS*/ - -#endif /* LWIP_NETCONN */ |