/**
* \addtogroup uip
* @{
*/
/**
* \file
* The uIP TCP/IP stack code.
* \author Adam Dunkels <adam@dunkels.com>
*/
/*
* Copyright (c) 2001-2003, Adam Dunkels.
* 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 uIP TCP/IP stack.
*
* $Id: uip.c,v 1.62.2.10 2003/10/07 13:23:01 adam Exp $
*
*/
/*
This is a small implementation of the IP and TCP protocols (as well as
some basic ICMP stuff). The implementation couples the IP, TCP and the
application layers very tightly. To keep the size of the compiled code
down, this code also features heavy usage of the goto statement.
The principle is that we have a small buffer, called the uip_buf, in
which the device driver puts an incoming packet. The TCP/IP stack
parses the headers in the packet, and calls upon the application. If
the remote host has sent data to the application, this data is present
in the uip_buf and the application read the data from there. It is up
to the application to put this data into a byte stream if needed. The
application will not be fed with data that is out of sequence.
If the application whishes to send data to the peer, it should put its
data into the uip_buf, 40 bytes from the start of the buffer. The
TCP/IP stack will calculate the checksums, and fill in the necessary
header fields and finally send the packet back to the peer.
*/
#include "uip.h"
#include "uipopt.h"
#include "uip_arch.h"
/*-----------------------------------------------------------------------------------*/
/* Variable definitions. */
/* The IP address of this host. If it is defined to be fixed (by setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set here. Otherwise, the address */
#if UIP_FIXEDADDR > 0
const u16_t uip_hostaddr[2] =
{HTONS((UIP_IPADDR0 << 8) | UIP_IPADDR1),
HTONS((UIP_IPADDR2 << 8) | UIP_IPADDR3)};
const u16_t uip_arp_draddr[2] =
{HTONS((UIP_DRIPADDR0 << 8) | UIP_DRIPADDR1),
HTONS((UIP_DRIPADDR2 << 8) | UIP_DRIPADDR3)};
const u16_t uip_arp_netmask[2] =
{HTONS((UIP_NETMASK0 << 8) | UIP_NETMASK1),
HTONS((UIP_NETMASK2 << 8) | UIP_NETMASK3)};
#else
u16_t uip_hostaddr[2];
u16_t uip_arp_draddr[2], uip_arp_netmask[2];
#endif /* UIP_FIXEDADDR */
u8_t uip_buf[UIP_BUFSIZE+2]; /* The packet buffer that contains
incoming packets. */
volatile u8_t *uip_appdata; /* The uip_appdata pointer points to
application data. */
volatile u8_t *uip_sappdata; /* The uip_appdata pointer points to the
application data which is to be sent. */
#if UIP_URGDATA > 0
volatile u8_t *uip_urgdata; /* The uip_urgdata pointer points to
urgent data (out-of-band data), if
present. */
volatile u8_t uip_urglen, uip_surglen;
#endif /* UIP_URGDATA > 0 */
volatile u16_t uip_len, uip_slen;
/* The uip_len is either 8 or 16 bits,
depending on the maximum packet
size. */
volatile u8_t uip_flags; /* The uip_flags variable is used for
communication between the TCP/IP stack
and the application program. */
struct uip_conn *uip_conn; /* uip_conn always points to the current
connection. */
struct uip_conn uip_conns[UIP_CONNS];
/* The uip_conns array holds all TCP
connections. */
u16_t uip_listenports[UIP_LISTENPORTS];
/* The uip_listenports list all currently
listning ports. */
#if UIP_UDP
struct uip_udp_conn *uip_udp_conn;
struct uip_udp_conn uip_udp_conns[UIP_UDP_CONNS];
#endif /* UIP_UDP */
static u16_t ipid; /* Ths ipid variable is an increasing
number that is used for the IP ID
field. */
static u8_t iss[4]; /* The iss variable is used for the TCP
initial sequence number. */
#if UIP_ACTIVE_OPEN
static u16_t lastport; /* Keeps track of the last port used for
a new connection. */
#endif /* UIP_ACTIVE_OPEN */
/* Temporary variables. */
volatile u8_t uip_acc32[4];
static u8_t c, opt;
static u16_t tmp16;
/* Structures and definitions. */
#define TCP_FIN 0x01
#define TCP_SYN 0x02
#define TCP_RST 0x04
#define TCP_PSH 0x08
#define TCP_ACK 0x10
#define TCP_URG 0x20
#define TCP_CTL 0x3f
#define ICMP_ECHO_REPLY 0
#define ICMP_ECHO 8
/* Macros. */
#define BUF ((uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
#define FBUF ((uip_tcpip_hdr *)&uip_reassbuf[0])
#define ICMPBUF ((uip_icmpip_hdr *)&uip_buf[UIP_LLH_LEN])
#define UDPBUF ((uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])
#if UIP_STATISTICS == 1
struct uip_stats uip_stat;
#define UIP_STAT(s) s
#else
#define UIP_STAT(s)
#endif /* UIP_STATISTICS == 1 */
#if UIP_LOGGING == 1
#include <stdio.h>
void uip_log(char *msg);
#define UIP_LOG(m) uip_log(m)
#else
#define UIP_LOG(m)
#endif /* UIP_LOGGING == 1 */
/*-----------------------------------------------------------------------------------*/
void
uip_init(void)
{
for(c = 0; c < UIP_LISTENPORTS; ++c) {
uip_listenports[c] = 0;
}
for(c = 0; c < UIP_CONNS; ++c) {
uip_conns[c].tcpstateflags = CLOSED;
}
#if UIP_ACTIVE_OPEN
lastport = 1024;
#endif /* UIP_ACTIVE_OPEN */
#if UIP_UDP
for(c = 0; c < UIP_UDP_CONNS; ++c) {
uip_udp_conns[c].lport = 0;
}
#endif /* UIP_UDP */
/* IPv4 initialization. */
#if UIP_FIXEDADDR == 0
uip_hostaddr[0] = uip_hostaddr[1] = 0;
#endif /* UIP_FIXEDADDR */
}
/*-----------------------------------------------------------------------------------*/
#if UIP_ACTIVE_OPEN
struct uip_conn *
uip_connect(u16_t *ripaddr, u16_t rport)
{
register struct uip_conn *conn, *cconn;
/* Find an unused local port. */
again:
++lastport;
if(lastport >= 32000) {
lastport = 4096;
}
/* Check if this port is already in use, and if so try to find
another one. */
for(c = 0; c < UIP_CONNS; ++c) {
conn = &uip_conns[c];
if(conn->tcpstateflags != CLOSED &&
conn->lport == htons(lastport)) {
goto again;
}
}
conn = 0;
for(c = 0; c < UIP_CONNS; ++c) {
cconn = &uip_conns[c];
if(cconn->tcpstateflags == CLOSED) {
conn = cconn;
break;
}
if(cconn->tcpstateflags == TIME_WAIT) {
if(conn == 0 ||
cconn->timer > uip_conn->timer) {
conn = cconn;
}
}
}
if(conn == 0) {
return 0;
}
conn->tcpstateflags = SYN_SENT;
conn->snd_nxt[0] = iss[0];
conn->snd_nxt[1] = iss[1];
conn->snd_nxt[2] = iss[2];
conn->snd_nxt[3] = iss[3];
conn->initialmss = conn->mss = UIP_TCP_MSS;
conn->len = 1; /* TCP length of the SYN is one. */
conn->nrtx = 0;
conn->timer = 1; /* Send the SYN next time around. */
conn->rto = UIP_RTO;
conn->sa = 0;
conn->sv = 16;
conn->lport = htons(lastport);
c
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ENC28J60 spi 接口 以太网 网络模块51单片机源码.rar (80个子文件)
uIP_0.9_Keil_8051.一步一步教你移植uIP0.9到8051+ENC28J60
icmp.h 2KB
main1.h 743B
udp.h 849B
enc28j60.c 13KB
MCU_UART.C 1KB
spi.h 371B
fs.c 4KB
uip_arp.c 13KB
ethernet.h 895B
uip.c 44KB
uIP0_9_Uv2.Bak 2KB
MCU_UART.H 214B
arp.h 3KB
uip.h 31KB
fsdata.h 4KB
enc28j60.h 9KB
uIP0.9.Uv2 2KB
ip.h 1KB
uip_arp.h 6KB
debug
cgi.lst 11KB
rtl8019as.obj 39KB
uIP.hex 57KB
enc28j60.lst 23KB
uIP0.lnp 263B
etherdev.obj 40KB
uip.obj 55KB
main1.lst 2KB
uip_arp.lst 21KB
spi.obj 15KB
uip_arch.lst 7KB
main2.__i 92B
MCU_UART.lst 5KB
uip_arch.obj 20KB
MCU_UART.obj 4KB
main.lst 8KB
uip.lst 72KB
uip_arp.obj 30KB
fsdata.obj 15KB
rtl8019as.lst 34KB
httpd.lst 18KB
main1.__i 92B
uIP.m51 90KB
main2.lst 2KB
uIP0.9.plg 969B
fs.lst 7KB
httpd.obj 28KB
cgi.obj 23KB
uIP.plg 253B
uIP0.9 242KB
enc28j60.obj 44KB
spi.__i 86B
uIP0.m51 78KB
spi.lst 2KB
main1.obj 44KB
main.obj 31KB
fsdata.lst 50KB
fs.obj 21KB
etherdev.lst 34KB
uIP 270KB
enc28j60.__i 101B
uipopt.h 16KB
main.h 743B
httpd.h 2KB
uIP0.9.Opt 2KB
rtl8019as.h 17KB
cgi.h 2KB
uIP0_9_Opt.Bak 2KB
spi.c 411B
uIP0.9.plg 1KB
uip_arch.c 4KB
cgi.c 7KB
httpd.c 10KB
main1.c 973B
fs.h 3KB
fsdata.c 35KB
uip_arch.h 4KB
main2.c 491B
struct.h.a 5KB
main.c 5KB
rtl8019as.c 24KB
共 80 条
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