[lwIP] remove lwip-1.4.0

components/net/lwip/COPYING

-/*
- * Copyright (c) 2001, 2002 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>
- *
- */
-
-

components/net/lwip/FILES

-src/      - The source code for the lwIP TCP/IP stack.
-doc/      - The documentation for lwIP.
-
-See also the FILES file in each subdirectory.

components/net/lwip/README

-INTRODUCTION
-
-lwIP is a small independent implementation of the TCP/IP protocol
-suite that has been developed by Adam Dunkels at the Computer and
-Networks Architectures (CNA) lab at the Swedish Institute of Computer
-Science (SICS).
-
-The focus of the lwIP TCP/IP implementation is to reduce the RAM usage
-while still having a full scale TCP. This making lwIP suitable for use
-in embedded systems with tens of kilobytes of free RAM and room for
-around 40 kilobytes of code ROM.
-
-FEATURES
-
-  * IP (Internet Protocol) including packet forwarding over multiple network
-    interfaces
-  * ICMP (Internet Control Message Protocol) for network maintenance and debugging
-  * IGMP (Internet Group Management Protocol) for multicast traffic management
-  * UDP (User Datagram Protocol) including experimental UDP-lite extensions
-  * TCP (Transmission Control Protocol) with congestion control, RTT estimation
-    and fast recovery/fast retransmit
-  * Specialized raw/native API for enhanced performance
-  * Optional Berkeley-like socket API
-  * DNS (Domain names resolver)
-  * SNMP (Simple Network Management Protocol)
-  * DHCP (Dynamic Host Configuration Protocol)
-  * AUTOIP (for IPv4, conform with RFC 3927)
-  * PPP (Point-to-Point Protocol)
-  * ARP (Address Resolution Protocol) for Ethernet
-
-LICENSE
-
-lwIP is freely available under a BSD license.
-
-DEVELOPMENT
-
-lwIP has grown into an excellent TCP/IP stack for embedded devices,
-and developers using the stack often submit bug fixes, improvements,
-and additions to the stack to further increase its usefulness.
-
-Development of lwIP is hosted on Savannah, a central point for
-software development, maintenance and distribution. Everyone can
-help improve lwIP by use of Savannah's interface, CVS and the
-mailing list. A core team of developers will commit changes to the
-CVS source tree.
-
-The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and
-contributions (such as platform ports) are in the 'contrib' module.
-
-See doc/savannah.txt for details on CVS server access for users and
-developers.
-
-Last night's CVS tar ball can be downloaded from:
-  http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
-
-The current CVS trees are web-browsable:
-  http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/
-  http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/
-
-Submit patches and bugs via the lwIP project page:
-  http://savannah.nongnu.org/projects/lwip/
-
-
-DOCUMENTATION
-
-The original out-dated homepage of lwIP and Adam Dunkels' papers on
-lwIP are at the official lwIP home page:
-  http://www.sics.se/~adam/lwip/
-
-Self documentation of the source code is regularly extracted from the
-current CVS sources and is available from this web page:
-  http://www.nongnu.org/lwip/
-
-There is now a constantly growin wiki about lwIP at
-  http://lwip.wikia.com/wiki/LwIP_Wiki
-
-Also, there are mailing lists you can subscribe at
-  http://savannah.nongnu.org/mail/?group=lwip
-plus searchable archives:
-  http://lists.nongnu.org/archive/html/lwip-users/
-  http://lists.nongnu.org/archive/html/lwip-devel/
-
-Reading Adam's papers, the files in docs/, browsing the source code
-documentation and browsing the mailing list archives is a good way to
-become familiar with the design of lwIP.
-
-Adam Dunkels <adam@sics.se>
-Leon Woestenberg <leon.woestenberg@gmx.net>
-

components/net/lwip/SConscript

-Import('RTT_ROOT')
-from building import *
-
-src = Split("""
-src/api/api_lib.c
-src/api/api_msg.c
-src/api/err.c
-src/api/netbuf.c
-src/api/netdb.c
-src/api/netifapi.c
-src/api/sockets.c
-src/api/tcpip.c
-src/arch/sys_arch.c
-src/core/def.c
-src/core/dhcp.c
-src/core/dns.c
-src/core/init.c
-src/core/memp.c
-src/core/netif.c
-src/core/pbuf.c
-src/core/raw.c
-src/core/stats.c
-src/core/sys.c
-src/core/tcp.c
-src/core/tcp_in.c
-src/core/tcp_out.c
-src/core/timers.c
-src/core/udp.c
-src/core/ipv4/autoip.c
-src/core/ipv4/icmp.c
-src/core/ipv4/igmp.c
-src/core/ipv4/inet.c
-src/core/ipv4/inet_chksum.c
-src/core/ipv4/ip.c
-src/core/ipv4/ip_addr.c
-src/core/ipv4/ip_frag.c
-src/netif/etharp.c
-src/netif/ethernetif.c
-src/netif/slipif.c
-""")
-
-snmp_src = Split("""
-src/core/snmp/asn1_dec.c
-src/core/snmp/asn1_enc.c
-src/core/snmp/mib2.c
-src/core/snmp/mib_structs.c
-src/core/snmp/msg_in.c
-src/core/snmp/msg_out.c
-""")
-
-ppp_src = Split("""
-src/netif/ppp/auth.c
-src/netif/ppp/chap.c
-src/netif/ppp/chpms.c
-src/netif/ppp/fsm.c
-src/netif/ppp/ipcp.c
-src/netif/ppp/lcp.c
-src/netif/ppp/magic.c
-src/netif/ppp/md5.c
-src/netif/ppp/pap.c
-src/netif/ppp/ppp.c
-src/netif/ppp/ppp_oe.c
-src/netif/ppp/randm.c
-src/netif/ppp/vj.c
-""")
-
-# The set of source files associated with this SConscript file.
-path = [GetCurrentDir() + '/src',
-    GetCurrentDir() + '/src/include',
-    GetCurrentDir() + '/src/include/ipv4',
-    GetCurrentDir() + '/src/arch/include',
-    GetCurrentDir() + '/src/include/netif']
-
-if GetDepend(['RT_LWIP_SNMP']):
-    src += snmp_src
-
-if GetDepend(['RT_LWIP_PPP']):
-    src += ppp_src
-    path += [GetCurrentDir() + '/src/netif/ppp']
-
-# For testing apps
-if GetDepend(['RT_USING_NETUTILS']):
-    src += Glob('./apps/*.c')
-
-group = DefineGroup('LwIP', src, depend = ['RT_USING_LWIP', 'RT_USING_LWIP140'], CPPPATH = path)
-
-Return('group')

components/net/lwip/UPGRADING

-This file lists major changes between release versions that require
-ports or applications to be changed. Use it to update a port or an
-application written for an older version of lwIP to correctly work
-with newer versions.
-
-
-(CVS HEAD)
-
-  * [Enter new changes just after this line - do not remove this line]
-
-  ++ Application changes:
-
-  * Replaced struct ip_addr by typedef ip_addr_t (struct ip_addr is kept for
-    compatibility to old applications, but will be removed in the future).
-
-  * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc()
-
-  +++ Raw API:
-    * Changed the semantics of tcp_close() (since it was rather a
-      shutdown before): Now the application does *NOT* get any calls to the recv
-      callback (aside from NULL/closed) after calling tcp_close()
-
-    * When calling tcp_abort() from a raw API TCP callback function,
-      make sure you return ERR_ABRT to prevent accessing unallocated memory.
-      (ERR_ABRT now means the applicaiton has called tcp_abort!)
-
-  +++ Netconn API:
-    * Changed netconn_receive() and netconn_accept() to return
-      err_t, not a pointer to new data/netconn.
-
-  +++ Socket API:
-    * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they
-      now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT.
-
-    * Added a minimal version of posix fctl() to have a
-      standardised way to set O_NONBLOCK for nonblocking sockets.
-
-  +++ all APIs:
-    * correctly implemented SO(F)_REUSEADDR
-
-  ++ Port changes
-
-  +++ new files:
-
-    * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h:
-
-    * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains
-      the actual application programmer's API
-  
-    * Separated timer implementation from sys.h/.c, moved to timers.h/.c;
-      Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you
-      still want to use your own timer implementation for NO_SYS==0 (as before).
-
-  +++ sys layer:
-
-    * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/
-      sys_sem_t;
-
-    * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
-
-    * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use
-      binary semaphores instead of mutexes - as before)
-
-  +++ new options:
-
-     * Don't waste memory when chaining segments, added option TCP_OVERSIZE to
-       prevent creating many small pbufs when calling tcp_write with many small
-       blocks of data. Instead, pbufs are allocated larger than needed and the
-       space is used for later calls to tcp_write.
-
-     * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs
-       in tcp_write/udp_send.
-
-    * Added an additional option LWIP_ETHERNET to support ethernet without ARP
-      (necessary for pure PPPoE)
-
-    * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may
-      be used to place these pools into user-defined memory by using external
-      declaration.
-
-    * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT
-
-  +++ new pools:
-
-     * Netdb uses a memp pool for allocating memory when getaddrinfo() is called,
-       so MEMP_NUM_NETDB has to be set accordingly.
-
-     * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so
-       MEMP_NUM_LOCALHOSTLIST has to be set accordingly.
-
-     * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have
-       to be set accordingly.
-
-     * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES
-       has to be set accordingly
-
-  * Integrated loopif into netif.c - loopif does not have to be created by the
-    port any more, just define LWIP_HAVE_LOOPIF to 1.
-
-  * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined
-    in cc.h, e.g. used by igmp)
-
-  * Added printf-formatter X8_F to printf u8_t as hex
-
-  * The heap now may be moved to user-defined memory by defining
-    LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
-
-  * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work
-    with user-allocated structs instead of calling mem_malloc
-
-  * Added const char* name to mem- and memp-stats for easier debugging.
-
-  * Calculate the TCP/UDP checksum while copying to only fetch data once:
-    Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum
-
-  * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to
-    more than one pcb.
-
-  * Changed the semantics of ARP_QUEUEING==0: ARP_QUEUEING now cannot be turned
-    off any more, if this is set to 0, only one packet (the most recent one) is
-    queued (like demanded by RFC 1122).
-
-  
-  ++ Major bugfixes/improvements
-
-  * Implemented tcp_shutdown() to only shut down one end of a connection
-  * Implemented shutdown() at socket- and netconn-level
-  * Added errorset support to select() + improved select speed overhead
-  * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x)
-  * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1
-  * Use macros defined in ip_addr.h to work with IP addresses
-  * Implemented many nonblocking socket/netconn functions
-  * Fixed ARP input processing: only add a new entry if a request was directed as us
-  * mem_realloc() to mem_trim() to prevent confusion with realloc()
-  * Some improvements for AutoIP (don't route/forward link-local addresses, don't break
-    existing connections when assigning a routable address)
-  * Correctly handle remote side overrunning our rcv_wnd in ooseq case
-  * Removed packing from ip_addr_t, the packed version is now only used in protocol headers
-  * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0
-  * Added support for static ARP table entries
-
-(STABLE-1.3.2)
-
-  * initial version of this file

components/net/lwip/apps/SConscript

-Import('RTT_ROOT')
-from building import *
-
-src   = Glob('*.c')
-group = DefineGroup('netutils', src, depend = ['RT_USING_NETUTILS'])
-
-Return('group')

components/net/lwip/apps/chargen.c

-#include <rtthread.h>
-
-#include "lwip/sockets.h"
-#define MAX_SERV                 32         /* Maximum number of chargen services. Don't need too many */
-#define CHARGEN_THREAD_NAME      "chargen"
-#if RT_THREAD_PRIORITY_MAX == 32
-#define CHARGEN_PRIORITY         20        /* Really low priority */
-#else
-#define CHARGEN_PRIORITY         200       /* Really low priority */
-#endif
-#define CHARGEN_THREAD_STACKSIZE 1024
-struct charcb
-{
-    struct charcb *next;
-    int socket;
-    struct sockaddr_in cliaddr;
-    socklen_t clilen;
-    char nextchar;
-};
-
-static struct charcb *charcb_list = 0;
-static int do_read(struct charcb *p_charcb);
-static void close_chargen(struct charcb *p_charcb);
-
-/**************************************************************
- * void chargen_thread(void *arg)
- *
- * chargen task. This server will wait for connections on well
- * known TCP port number: 19. For every connection, the server will
- * write as much data as possible to the tcp port.
- **************************************************************/
-static void chargen_thread(void *arg)
-{
-    int listenfd;
-    struct sockaddr_in chargen_saddr;
-    fd_set readset;
-    fd_set writeset;
-    int i, maxfdp1;
-    struct charcb *p_charcb;
-
-    /* First acquire our socket for listening for connections */
-    listenfd = lwip_socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
-
-    LWIP_ASSERT("chargen_thread(): Socket create failed.", listenfd >= 0);
-    memset(&chargen_saddr, 0, sizeof(chargen_saddr));
-    chargen_saddr.sin_family = AF_INET;
-    chargen_saddr.sin_addr.s_addr = htonl(INADDR_ANY);
-    chargen_saddr.sin_port = htons(19);     // Chargen server port
-
-    if (lwip_bind(listenfd, (struct sockaddr *) &chargen_saddr, sizeof(chargen_saddr)) == -1)
-        LWIP_ASSERT("chargen_thread(): Socket bind failed.", 0);
-
-    /* Put socket into listening mode */
-    if (lwip_listen(listenfd, MAX_SERV) == -1)
-        LWIP_ASSERT("chargen_thread(): Listen failed.", 0);
-
-    /* Wait forever for network input: This could be connections or data */
-    for (;;)
-    {
-        maxfdp1 = listenfd+1;
-
-        /* Determine what sockets need to be in readset */
-        FD_ZERO(&readset);
-        FD_ZERO(&writeset);
-        FD_SET(listenfd, &readset);
-        for (p_charcb = charcb_list; p_charcb; p_charcb = p_charcb->next)
-        {
-            if (maxfdp1 < p_charcb->socket + 1)
-                maxfdp1 = p_charcb->socket + 1;
-            FD_SET(p_charcb->socket, &readset);
-            FD_SET(p_charcb->socket, &writeset);
-        }
-
-        /* Wait for data or a new connection */
-        i = lwip_select(maxfdp1, &readset, &writeset, 0, 0);
-
-        if (i == 0) continue;
-
-        /* At least one descriptor is ready */
-        if (FD_ISSET(listenfd, &readset))
-        {
-            /* We have a new connection request!!! */
-            /* Lets create a new control block */
-            p_charcb = (struct charcb *)rt_calloc(1, sizeof(struct charcb));
-            if (p_charcb)
-            {
-                p_charcb->socket = lwip_accept(listenfd,
-                                        (struct sockaddr *) &p_charcb->cliaddr,
-                                        &p_charcb->clilen);
-                if (p_charcb->socket < 0)
-                    rt_free(p_charcb);
-                else
-                {
-                    /* Keep this tecb in our list */
-                    p_charcb->next = charcb_list;
-                    charcb_list = p_charcb;
-                    p_charcb->nextchar = 0x21;
-                }
-            }
-			else
-			{
-                /* No memory to accept connection. Just accept and then close */
-                int sock;
-                struct sockaddr cliaddr;
-                socklen_t clilen;
-
-                sock = lwip_accept(listenfd, &cliaddr, &clilen);
-                if (sock >= 0)
-                    lwip_close(sock);
-            }
-        }
-        /* Go through list of connected clients and process data */
-        for (p_charcb = charcb_list; p_charcb; p_charcb = p_charcb->next)
-        {
-            if (FD_ISSET(p_charcb->socket, &readset))
-            {
-                /* This socket is ready for reading. This could be because someone typed
-                 * some characters or it could be because the socket is now closed. Try reading
-                 * some data to see. */
-                if (do_read(p_charcb) < 0)
-                    break;
-            }
-            if (FD_ISSET(p_charcb->socket, &writeset))
-            {
-                char line[80];
-                char setchar = p_charcb->nextchar;
-
-                for( i = 0; i < 59; i++)
-                {
-                    line[i] = setchar;
-                    if (++setchar == 0x7f)
-                        setchar = 0x21;
-                }
-                line[i] = 0;
-                strcat(line, "\n\r");
-                if (lwip_write(p_charcb->socket, line, strlen(line)) < 0)
-                {
-                    close_chargen(p_charcb);
-                    break;
-                }
-                if (++p_charcb->nextchar == 0x7f)
-                    p_charcb->nextchar = 0x21;
-            }
-        }
-    }
-}
-
-/**************************************************************
- * void close_chargen(struct charcb *p_charcb)
- *
- * Close the socket and remove this charcb from the list.
- **************************************************************/
-static void close_chargen(struct charcb *p_charcb)
-{
-    struct charcb *p_search_charcb;
-
-    /* Either an error or tcp connection closed on other
-     * end. Close here */
-    lwip_close(p_charcb->socket);
-
-    /* Free charcb */
-    if (charcb_list == p_charcb)
-        charcb_list = p_charcb->next;
-    else
-        for (p_search_charcb = charcb_list; p_search_charcb; p_search_charcb = p_search_charcb->next)
-        {
-            if (p_search_charcb->next == p_charcb)
-            {
-                p_search_charcb->next = p_charcb->next;
-                break;
-            }
-        }
-
-    rt_free(p_charcb);
-}
-
-/**************************************************************
- * void do_read(struct charcb *p_charcb)
- *
- * Socket definitely is ready for reading. Read a buffer from the socket and
- * discard the data.  If no data is read, then the socket is closed and the
- * charcb is removed from the list and freed.
- **************************************************************/
-static int do_read(struct charcb *p_charcb)
-{
-    char buffer[80];
-    int readcount;
-
-    /* Read some data */
-    readcount = lwip_read(p_charcb->socket, &buffer, 80);
-    if (readcount <= 0)
-    {
-        close_chargen(p_charcb);
-        return -1;
-    }
-    return 0;
-}
-
-void chargen_init(void)
-{
-	rt_thread_t chargen;
-
-	chargen = rt_thread_create(CHARGEN_THREAD_NAME,
-		chargen_thread, RT_NULL,
-		CHARGEN_THREAD_STACKSIZE,
-		CHARGEN_PRIORITY, 5);
-	if (chargen != RT_NULL) rt_thread_startup(chargen);
-}
-#ifdef RT_USING_FINSH
-#include <finsh.h>
-void chargen()
-{
-	chargen_init();
-}
-FINSH_FUNCTION_EXPORT(chargen, start chargen server);
-#endif

components/net/lwip/apps/netio.c

-/**
- * @file
- * MetIO Server
- *
- */
-
-/*
- * 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.
- *
- */
-#include "lwip/opt.h"
-
-#if LWIP_TCP
-#include "lwip/tcp.h"
-
-/*
- * This implements a netio server.
- *  The client sends a command word (4 bytes) then a data length word (4 bytes).
- *  If the command is "receive", the server is to consume "data length" bytes into
- *   a circular buffer until the first byte is non-zero, then it is to consume
- *   another command/data pair.
- *  If the command is "send", the server is to send "data length" bytes from a circular
- *   buffer with the first byte being zero, until "some time" (6 seconds in the
- *   current netio126.zip download) has passed and then send one final buffer with
- *   the first byte being non-zero. Then it is to consume another command/data pair.
- */
-
-/* See http://www.nwlab.net/art/netio/netio.html to get the netio tool */
-
-/* implementation options */
-#define NETIO_BUF_SIZE              (4 * 1024)
-#define NETIO_USE_STATIC_BUF        0
-
-/* NetIO server state definition */
-#define NETIO_STATE_WAIT_FOR_CMD    0
-#define NETIO_STATE_RECV_DATA       1
-#define NETIO_STATE_SEND_DATA       2
-#define NETIO_STATE_SEND_DATA_LAST  3
-#define NETIO_STATE_DONE            4
-
-struct netio_state {
-  u32_t  state;
-  u32_t  cmd;
-  u32_t  data_len;
-  u32_t  cntr;
-  u8_t * buf_ptr;
-  u32_t  buf_pos;
-  u32_t  first_byte;
-  u32_t  time_stamp;
-};
-
-/* NetIO command protocol definition */
-#define NETIO_CMD_QUIT              0
-#define NETIO_CMD_C2S               1
-#define NETIO_CMD_S2C               2
-#define NETIO_CMD_RES               3
-
-static err_t netio_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
-
-static void
-netio_close(void *arg, struct tcp_pcb *pcb)
-{
-  err_t err;
-
-  struct netio_state *ns = arg;
-  ns->state = NETIO_STATE_DONE;
-  tcp_recv(pcb, NULL);
-  err = tcp_close(pcb);
-
-  if (err != ERR_OK) {
-    /* closing failed, try again later */
-    tcp_recv(pcb, netio_recv);
-  } else {
-    /* closing succeeded */
-#if NETIO_USE_STATIC_BUF != 1
-    if(ns->buf_ptr != NULL){
-      mem_free(ns->buf_ptr);
-    }
-#endif
-    tcp_arg(pcb, NULL);
-    tcp_poll(pcb, NULL, 0);
-    tcp_sent(pcb, NULL);
-    if (arg != NULL) {
-      mem_free(arg);
-    }
-  }
-}
-
-static err_t
-netio_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
-{
-  struct netio_state *ns = arg;
-  u8_t * data_ptr;
-  u32_t data_cntr;
-  struct pbuf *q = p;
-  u16_t len;
-
-  if (p != NULL) {
-    tcp_recved(pcb, p->tot_len);
-  }
-
-  if (err == ERR_OK && q != NULL) {
-
-    while (q != NULL) {
-      data_cntr = q->len;
-      data_ptr = q->payload;
-      while (data_cntr--) {
-        if (ns->state == NETIO_STATE_DONE){
-          netio_close(ns, pcb);
-          break;
-        } else if (ns->state == NETIO_STATE_WAIT_FOR_CMD) {
-          if (ns->cntr < 4) {
-            /* build up the CMD field */
-            ns->cmd <<= 8;
-            ns->cmd |= *data_ptr++;
-            ns->cntr++;
-          } else if (ns->cntr < 8) {
-            /* build up the DATA field */
-            ns->data_len <<= 8;
-            ns->data_len |= *data_ptr++;
-            ns->cntr++;
-
-            if (ns->cntr == 8) {
-              /* now we have full command and data words */
-              ns->cntr = 0;
-              ns->buf_pos = 0;
-              ns->buf_ptr[0] = 0;
-              if (ns->cmd == NETIO_CMD_C2S) {
-                ns->state = NETIO_STATE_RECV_DATA;
-              } else if (ns->cmd == NETIO_CMD_S2C) {
-                ns->state = NETIO_STATE_SEND_DATA;
-                /* start timer */
-                ns->time_stamp = rt_tick_get();
-                /* send first round of data */
-
-                len = tcp_sndbuf(pcb);
-                len = LWIP_MIN(len, ns->data_len - ns->cntr);
-                len = LWIP_MIN(len, NETIO_BUF_SIZE - ns->buf_pos);
-
-                do {
-                  err = tcp_write(pcb, ns->buf_ptr + ns->buf_pos, len, TCP_WRITE_FLAG_COPY);
-                  if (err == ERR_MEM) {
-                    len /= 2;
-                  }
-                } while ((err == ERR_MEM) && (len > 1));
-
-                ns->buf_pos += len;
-                ns->cntr    += len;
-
-              } else {
-                /* unrecognized command, punt */
-                ns->cntr = 0;
-                ns->buf_pos = 0;
-                ns->buf_ptr[0] = 0;
-                netio_close(ns, pcb);
-                break;
-              }
-            }
-          } else {
-            /* in trouble... shouldn't be in this state! */
-          }
-
-        } else if (ns->state == NETIO_STATE_RECV_DATA) {
-
-          if(ns->cntr == 0){
-            /* save the first byte of this new round of data
-             * this will not match ns->buf_ptr[0] in the case that
-             *   NETIO_BUF_SIZE is less than ns->data_len.
-             */
-            ns->first_byte = *data_ptr;
-          }
-
-          ns->buf_ptr[ns->buf_pos++] = *data_ptr++;
-          ns->cntr++;
-
-          if (ns->buf_pos == NETIO_BUF_SIZE) {
-            /* circularize the buffer */
-            ns->buf_pos = 0;
-          }
-
-          if(ns->cntr == ns->data_len){
-            ns->cntr = 0;
-            if (ns->first_byte != 0) {
-              /* if this last round did not start with 0,
-               *  go look for another command */
-              ns->state = NETIO_STATE_WAIT_FOR_CMD;
-              ns->data_len = 0;
-              ns->cmd = 0;
-              /* TODO LWIP_DEBUGF( print out some throughput calculation results... ); */
-            } else {
-              /* stay here and wait on more data */
-            }
-          }
-
-        } else if (ns->state == NETIO_STATE_SEND_DATA
-            || ns->state == NETIO_STATE_SEND_DATA_LAST) {
-          /* I don't think this should happen... */
-        } else {
-          /* done / quit */
-          netio_close(ns, pcb);
-          break;
-        } /* end of ns->state condition */
-      } /* end of while data still in this pbuf */
-
-      q = q->next;
-    }
-
-    pbuf_free(p);
-
-  } else {
-
-    /* error or closed by other side */
-    if (p != NULL) {
-      pbuf_free(p);
-    }
-
-    /* close the connection */
-    netio_close(ns, pcb);
-
-  }
-  return ERR_OK;
-
-}
-
-static err_t
-netio_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
-{
-  struct netio_state *ns = arg;
-  err_t err = ERR_OK;
-
-  if (ns->cntr >= ns->data_len && ns->state == NETIO_STATE_SEND_DATA) {
-    /* done with this round of sending */
-    ns->buf_pos = 0;
-    ns->cntr = 0;
-
-    /* check if timer expired */
-    if (rt_tick_get() - ns->time_stamp > 600) {
-      ns->buf_ptr[0] = 1;
-      ns->state = NETIO_STATE_SEND_DATA_LAST;
-    } else {
-      ns->buf_ptr[0] = 0;
-    }
-  }
-
-  if(ns->state == NETIO_STATE_SEND_DATA_LAST || ns->state == NETIO_STATE_SEND_DATA){
-    len = tcp_sndbuf(pcb);
-    len = LWIP_MIN(len, ns->data_len - ns->cntr);
-    len = LWIP_MIN(len, NETIO_BUF_SIZE - ns->buf_pos);
-
-    if(ns->cntr < ns->data_len){
-      do {
-        err = tcp_write(pcb, ns->buf_ptr + ns->buf_pos, len, TCP_WRITE_FLAG_COPY);
-        if (err == ERR_MEM) {
-          len /= 2;
-        }
-      } while ((err == ERR_MEM) && (len > 1));
-
-      ns->buf_pos += len;
-      if(ns->buf_pos >= NETIO_BUF_SIZE){
-        ns->buf_pos = 0;
-      }
-
-      ns->cntr += len;
-    }
-  }
-
-  if(ns->cntr >= ns->data_len && ns->state == NETIO_STATE_SEND_DATA_LAST){
-    /* we have buffered up all our data to send this last round, go look for a command */
-   ns->state = NETIO_STATE_WAIT_FOR_CMD;
-   ns->cntr  = 0;
-   /* TODO LWIP_DEBUGF( print out some throughput calculation results... ); */
-  }
-
-  return ERR_OK;
-}
-
-static err_t
-netio_poll(void *arg, struct tcp_pcb *pcb)
-{
-  struct netio_state * ns = arg;
-  if(ns->state == NETIO_STATE_SEND_DATA){
-
-  } else if(ns->state == NETIO_STATE_DONE){
-    netio_close(ns, pcb);
-  }
-
-  return ERR_OK;
-
-}
-
-#if NETIO_USE_STATIC_BUF == 1
-static u8_t netio_buf[NETIO_BUF_SIZE];
-#endif
-
-static err_t
-netio_accept(void *arg, struct tcp_pcb *pcb, err_t err)
-{
-  struct netio_state * ns;
-
-  LWIP_UNUSED_ARG(err);
-
-  ns = mem_malloc(sizeof(struct netio_state));
-
-  if(ns == NULL){
-    return ERR_MEM;
-  }
-
-  ns->state = NETIO_STATE_WAIT_FOR_CMD;
-  ns->data_len = 0;
-  ns->cmd = 0;
-  ns->cntr = 0;
-  ns->buf_pos = 0;
-#if NETIO_USE_STATIC_BUF == 1
-  ns->buf_ptr = netio_buf;
-#else
-  ns->buf_ptr = mem_malloc(NETIO_BUF_SIZE);
-
-  if(ns->buf_ptr == NULL){
-    mem_free(ns);
-    return ERR_MEM;
-  }
-#endif
-
-  ns->buf_ptr[0] = 0;
-
-  tcp_arg(pcb, ns);
-  tcp_sent(pcb, netio_sent);
-  tcp_recv(pcb, netio_recv);
-  tcp_poll(pcb, netio_poll, 4); /* every 2 seconds */
-  return ERR_OK;
-}
-
-void netio_init(void)
-{
-  struct tcp_pcb *pcb;
-
-  pcb = tcp_new();
-  tcp_bind(pcb, IP_ADDR_ANY, 18767);
-  pcb = tcp_listen(pcb);
-  tcp_accept(pcb, netio_accept);
-}
-
-#endif /* LWIP_TCP */
-
-#ifdef RT_USING_FINSH
-#include <finsh.h>
-FINSH_FUNCTION_EXPORT(netio_init, netio server);
-#endif

components/net/lwip/doc/FILES

-savannah.txt   - How to obtain the current development source code.
-contrib.txt    - How to contribute to lwIP as a developer.
-rawapi.txt     - The documentation for the core API of lwIP.
-                 Also provides an overview about the other APIs and multithreading.
-snmp_agent.txt - The documentation for the lwIP SNMP agent.
-sys_arch.txt   - The documentation for a system abstraction layer of lwIP.

components/net/lwip/src/core/ipv6/README

-IPv6 support in lwIP is very experimental.