727 lines
22 KiB
C
727 lines
22 KiB
C
/**
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* @file
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* Sequential API External module
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*
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*/
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/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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/* This is the part of the API that is linked with
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the application */
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#include "lwip/opt.h"
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#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
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#include "lwip/api.h"
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#include "lwip/tcpip.h"
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#include "lwip/memp.h"
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#include "lwip/ip.h"
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#include "lwip/raw.h"
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#include "lwip/udp.h"
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#include "lwip/tcp.h"
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#include <string.h>
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/**
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* Create a new netconn (of a specific type) that has a callback function.
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* The corresponding pcb is also created.
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*
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* @param t the type of 'connection' to create (@see enum netconn_type)
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* @param proto the IP protocol for RAW IP pcbs
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* @param callback a function to call on status changes (RX available, TX'ed)
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* @return a newly allocated struct netconn or
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* NULL on memory error
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*/
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struct netconn*
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netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, netconn_callback callback)
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{
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struct netconn *conn;
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struct api_msg msg;
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conn = netconn_alloc(t, callback);
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if (conn != NULL) {
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msg.function = do_newconn;
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msg.msg.msg.n.proto = proto;
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msg.msg.conn = conn;
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if (TCPIP_APIMSG(&msg) != ERR_OK) {
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LWIP_ASSERT("freeing conn without freeing pcb", conn->pcb.tcp == NULL);
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LWIP_ASSERT("conn has no op_completed", sys_sem_valid(&conn->op_completed));
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LWIP_ASSERT("conn has no recvmbox", sys_mbox_valid(&conn->recvmbox));
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#if LWIP_TCP
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LWIP_ASSERT("conn->acceptmbox shouldn't exist", !sys_mbox_valid(&conn->acceptmbox));
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#endif /* LWIP_TCP */
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sys_sem_free(&conn->op_completed);
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sys_mbox_free(&conn->recvmbox);
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memp_free(MEMP_NETCONN, conn);
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return NULL;
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}
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}
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return conn;
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}
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/**
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* Close a netconn 'connection' and free its resources.
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* UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate
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* after this returns.
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*
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* @param conn the netconn to delete
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* @return ERR_OK if the connection was deleted
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*/
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err_t
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netconn_delete(struct netconn *conn)
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{
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struct api_msg msg;
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/* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */
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if (conn == NULL) {
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return ERR_OK;
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}
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msg.function = do_delconn;
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msg.msg.conn = conn;
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tcpip_apimsg(&msg);
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netconn_free(conn);
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/* don't care for return value of do_delconn since it only calls void functions */
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return ERR_OK;
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}
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/**
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* Get the local or remote IP address and port of a netconn.
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* For RAW netconns, this returns the protocol instead of a port!
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*
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* @param conn the netconn to query
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* @param addr a pointer to which to save the IP address
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* @param port a pointer to which to save the port (or protocol for RAW)
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* @param local 1 to get the local IP address, 0 to get the remote one
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* @return ERR_CONN for invalid connections
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* ERR_OK if the information was retrieved
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*/
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err_t
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netconn_getaddr(struct netconn *conn, ip_addr_t *addr, u16_t *port, u8_t local)
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{
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struct api_msg msg;
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err_t err;
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LWIP_ERROR("netconn_getaddr: invalid conn", (conn != NULL), return ERR_ARG;);
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LWIP_ERROR("netconn_getaddr: invalid addr", (addr != NULL), return ERR_ARG;);
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LWIP_ERROR("netconn_getaddr: invalid port", (port != NULL), return ERR_ARG;);
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msg.function = do_getaddr;
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msg.msg.conn = conn;
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msg.msg.msg.ad.ipaddr = addr;
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msg.msg.msg.ad.port = port;
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msg.msg.msg.ad.local = local;
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err = TCPIP_APIMSG(&msg);
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NETCONN_SET_SAFE_ERR(conn, err);
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return err;
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}
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/**
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* Bind a netconn to a specific local IP address and port.
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* Binding one netconn twice might not always be checked correctly!
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*
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* @param conn the netconn to bind
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* @param addr the local IP address to bind the netconn to (use IP_ADDR_ANY
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* to bind to all addresses)
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* @param port the local port to bind the netconn to (not used for RAW)
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* @return ERR_OK if bound, any other err_t on failure
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*/
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err_t
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netconn_bind(struct netconn *conn, ip_addr_t *addr, u16_t port)
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{
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struct api_msg msg;
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err_t err;
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LWIP_ERROR("netconn_bind: invalid conn", (conn != NULL), return ERR_ARG;);
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msg.function = do_bind;
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msg.msg.conn = conn;
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msg.msg.msg.bc.ipaddr = addr;
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msg.msg.msg.bc.port = port;
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err = TCPIP_APIMSG(&msg);
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NETCONN_SET_SAFE_ERR(conn, err);
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return err;
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}
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/**
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* Connect a netconn to a specific remote IP address and port.
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*
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* @param conn the netconn to connect
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* @param addr the remote IP address to connect to
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* @param port the remote port to connect to (no used for RAW)
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* @return ERR_OK if connected, return value of tcp_/udp_/raw_connect otherwise
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*/
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err_t
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netconn_connect(struct netconn *conn, ip_addr_t *addr, u16_t port)
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{
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struct api_msg msg;
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err_t err;
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LWIP_ERROR("netconn_connect: invalid conn", (conn != NULL), return ERR_ARG;);
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msg.function = do_connect;
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msg.msg.conn = conn;
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msg.msg.msg.bc.ipaddr = addr;
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msg.msg.msg.bc.port = port;
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/* This is the only function which need to not block tcpip_thread */
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err = tcpip_apimsg(&msg);
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NETCONN_SET_SAFE_ERR(conn, err);
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return err;
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}
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/**
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* Disconnect a netconn from its current peer (only valid for UDP netconns).
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*
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* @param conn the netconn to disconnect
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* @return TODO: return value is not set here...
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*/
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err_t
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netconn_disconnect(struct netconn *conn)
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{
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struct api_msg msg;
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err_t err;
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LWIP_ERROR("netconn_disconnect: invalid conn", (conn != NULL), return ERR_ARG;);
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msg.function = do_disconnect;
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msg.msg.conn = conn;
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err = TCPIP_APIMSG(&msg);
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NETCONN_SET_SAFE_ERR(conn, err);
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return err;
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}
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/**
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* Set a TCP netconn into listen mode
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*
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* @param conn the tcp netconn to set to listen mode
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* @param backlog the listen backlog, only used if TCP_LISTEN_BACKLOG==1
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* @return ERR_OK if the netconn was set to listen (UDP and RAW netconns
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* don't return any error (yet?))
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*/
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err_t
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netconn_listen_with_backlog(struct netconn *conn, u8_t backlog)
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{
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struct api_msg msg;
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err_t err;
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/* This does no harm. If TCP_LISTEN_BACKLOG is off, backlog is unused. */
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LWIP_UNUSED_ARG(backlog);
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LWIP_ERROR("netconn_listen: invalid conn", (conn != NULL), return ERR_ARG;);
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msg.function = do_listen;
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msg.msg.conn = conn;
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#if TCP_LISTEN_BACKLOG
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msg.msg.msg.lb.backlog = backlog;
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#endif /* TCP_LISTEN_BACKLOG */
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err = TCPIP_APIMSG(&msg);
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NETCONN_SET_SAFE_ERR(conn, err);
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return err;
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}
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/**
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* Accept a new connection on a TCP listening netconn.
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*
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* @param conn the TCP listen netconn
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* @param new_conn pointer where the new connection is stored
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* @return ERR_OK if a new connection has been received or an error
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* code otherwise
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*/
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err_t
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netconn_accept(struct netconn *conn, struct netconn **new_conn)
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{
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#if LWIP_TCP
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struct netconn *newconn;
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err_t err;
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#if TCP_LISTEN_BACKLOG
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struct api_msg msg;
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#endif /* TCP_LISTEN_BACKLOG */
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LWIP_ERROR("netconn_accept: invalid pointer", (new_conn != NULL), return ERR_ARG;);
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*new_conn = NULL;
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LWIP_ERROR("netconn_accept: invalid conn", (conn != NULL), return ERR_ARG;);
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LWIP_ERROR("netconn_accept: invalid acceptmbox", sys_mbox_valid(&conn->acceptmbox), return ERR_ARG;);
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err = conn->last_err;
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if (ERR_IS_FATAL(err)) {
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/* don't recv on fatal errors: this might block the application task
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waiting on acceptmbox forever! */
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return err;
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}
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#if LWIP_SO_RCVTIMEO
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if (sys_arch_mbox_fetch(&conn->acceptmbox, (void **)&newconn, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
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NETCONN_SET_SAFE_ERR(conn, ERR_TIMEOUT);
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return ERR_TIMEOUT;
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}
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#else
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sys_arch_mbox_fetch(&conn->acceptmbox, (void **)&newconn, 0);
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#endif /* LWIP_SO_RCVTIMEO*/
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/* Register event with callback */
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API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0);
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if (newconn == NULL) {
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/* connection has been closed */
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NETCONN_SET_SAFE_ERR(conn, ERR_CLSD);
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return ERR_CLSD;
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}
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#if TCP_LISTEN_BACKLOG
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/* Let the stack know that we have accepted the connection. */
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msg.function = do_recv;
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msg.msg.conn = conn;
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/* don't care for the return value of do_recv */
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TCPIP_APIMSG(&msg);
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#endif /* TCP_LISTEN_BACKLOG */
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*new_conn = newconn;
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/* don't set conn->last_err: it's only ERR_OK, anyway */
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return ERR_OK;
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#else /* LWIP_TCP */
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LWIP_UNUSED_ARG(conn);
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LWIP_UNUSED_ARG(new_conn);
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return ERR_ARG;
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#endif /* LWIP_TCP */
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}
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/**
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* Receive data: actual implementation that doesn't care whether pbuf or netbuf
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* is received
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*
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* @param conn the netconn from which to receive data
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* @param new_buf pointer where a new pbuf/netbuf is stored when received data
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* @return ERR_OK if data has been received, an error code otherwise (timeout,
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* memory error or another error)
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*/
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static err_t
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netconn_recv_data(struct netconn *conn, void **new_buf)
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{
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void *buf = NULL;
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u16_t len;
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err_t err;
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#if LWIP_TCP
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struct api_msg msg;
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#endif /* LWIP_TCP */
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LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;);
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*new_buf = NULL;
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LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;);
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LWIP_ERROR("netconn_accept: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;);
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err = conn->last_err;
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if (ERR_IS_FATAL(err)) {
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/* don't recv on fatal errors: this might block the application task
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waiting on recvmbox forever! */
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/* @todo: this does not allow us to fetch data that has been put into recvmbox
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before the fatal error occurred - is that a problem? */
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return err;
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}
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#if LWIP_SO_RCVTIMEO
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if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
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NETCONN_SET_SAFE_ERR(conn, ERR_TIMEOUT);
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return ERR_TIMEOUT;
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}
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#else
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sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0);
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#endif /* LWIP_SO_RCVTIMEO*/
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#if LWIP_TCP
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if (conn->type == NETCONN_TCP) {
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if (!netconn_get_noautorecved(conn) || (buf == NULL)) {
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/* Let the stack know that we have taken the data. */
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/* TODO: Speedup: Don't block and wait for the answer here
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(to prevent multiple thread-switches). */
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msg.function = do_recv;
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msg.msg.conn = conn;
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if (buf != NULL) {
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msg.msg.msg.r.len = ((struct pbuf *)buf)->tot_len;
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} else {
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msg.msg.msg.r.len = 1;
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}
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/* don't care for the return value of do_recv */
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TCPIP_APIMSG(&msg);
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}
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/* If we are closed, we indicate that we no longer wish to use the socket */
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if (buf == NULL) {
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API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0);
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/* Avoid to lose any previous error code */
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NETCONN_SET_SAFE_ERR(conn, ERR_CLSD);
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return ERR_CLSD;
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}
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len = ((struct pbuf *)buf)->tot_len;
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}
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#endif /* LWIP_TCP */
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#if LWIP_TCP && (LWIP_UDP || LWIP_RAW)
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else
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#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */
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#if (LWIP_UDP || LWIP_RAW)
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{
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LWIP_ASSERT("buf != NULL", buf != NULL);
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len = netbuf_len((struct netbuf *)buf);
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}
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#endif /* (LWIP_UDP || LWIP_RAW) */
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SYS_ARCH_DEC(conn->recv_avail, len);
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/* Register event with callback */
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API_EVENT(conn, NETCONN_EVT_RCVMINUS, len);
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LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv_data: received %p, len=%"U16_F"\n", buf, len));
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*new_buf = buf;
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/* don't set conn->last_err: it's only ERR_OK, anyway */
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return ERR_OK;
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}
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/**
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* Receive data (in form of a pbuf) from a TCP netconn
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*
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* @param conn the netconn from which to receive data
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* @param new_buf pointer where a new pbuf is stored when received data
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* @return ERR_OK if data has been received, an error code otherwise (timeout,
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* memory error or another error)
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* ERR_ARG if conn is not a TCP netconn
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*/
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err_t
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netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf)
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{
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LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL) &&
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netconn_type(conn) == NETCONN_TCP, return ERR_ARG;);
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return netconn_recv_data(conn, (void **)new_buf);
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}
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/**
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* Receive data (in form of a netbuf containing a packet buffer) from a netconn
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*
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* @param conn the netconn from which to receive data
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* @param new_buf pointer where a new netbuf is stored when received data
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* @return ERR_OK if data has been received, an error code otherwise (timeout,
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* memory error or another error)
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*/
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err_t
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netconn_recv(struct netconn *conn, struct netbuf **new_buf)
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{
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#if LWIP_TCP
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struct netbuf *buf = NULL;
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err_t err;
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#endif /* LWIP_TCP */
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LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;);
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*new_buf = NULL;
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LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;);
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LWIP_ERROR("netconn_accept: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;);
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#if LWIP_TCP
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if (conn->type == NETCONN_TCP) {
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struct pbuf *p = NULL;
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/* This is not a listening netconn, since recvmbox is set */
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buf = (struct netbuf *)memp_malloc(MEMP_NETBUF);
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if (buf == NULL) {
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NETCONN_SET_SAFE_ERR(conn, ERR_MEM);
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return ERR_MEM;
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}
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err = netconn_recv_data(conn, (void **)&p);
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if (err != ERR_OK) {
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memp_free(MEMP_NETBUF, buf);
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return err;
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}
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LWIP_ASSERT("p != NULL", p != NULL);
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buf->p = p;
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buf->ptr = p;
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buf->port = 0;
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ip_addr_set_any(&buf->addr);
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*new_buf = buf;
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/* don't set conn->last_err: it's only ERR_OK, anyway */
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return ERR_OK;
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} else
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#endif /* LWIP_TCP */
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{
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#if (LWIP_UDP || LWIP_RAW)
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return netconn_recv_data(conn, (void **)new_buf);
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#endif /* (LWIP_UDP || LWIP_RAW) */
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}
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}
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/**
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* TCP: update the receive window: by calling this, the application
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* 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 ((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);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
* @return ERR_OK if data was sent, any other err_t on error
|
|
*/
|
|
err_t
|
|
netconn_write(struct netconn *conn, const void *dataptr, size_t size, u8_t apiflags)
|
|
{
|
|
struct api_msg msg;
|
|
err_t err;
|
|
|
|
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;
|
|
}
|
|
|
|
/* @todo: for non-blocking write, check if 'size' would ever fit into
|
|
snd_queue or snd_buf */
|
|
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;
|
|
/* 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);
|
|
|
|
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 */
|