请教LWIP1.4.1和2.0.2对应用层表现的差异问题

发布于 2018-05-29 14:44:54 浏览：8498 订阅该版

我最近使用STM32F207跑一个LWIP，由于不懂LWIP，所以发现如下几个问题：
全部基于想同LWIP配置项的情况下对比。极个别项在不同版本可能需要关闭。
```c
#define RT_USING_LWIP
// #define RT_USING_LWIP132
// #define RT_USING_LWIP141
#define RT_USING_LWIP202

#define RT_LWIP_ICMP
// #define RT_LWIP_IGMP
#define RT_LWIP_UDP
#define RT_LWIP_TCP
// #define RT_LWIP_DNS
// #define RT_LWIP_SNMP
// #define RT_LWIP_DHCP

#ifdef RT_LWIP_DHCP
    #define IP_SOF_BROADCAST                     1
    #define IP_SOF_BROADCAST_RECV                1
#endif

#define RT_MEMP_NUM_NETCONN 2
#define RT_LWIP_PBUF_NUM 6
#define RT_LWIP_RAW_PCB_NUM 2
#define RT_LWIP_UDP_PCB_NUM 2
#define RT_LWIP_TCP_PCB_NUM 2
#define RT_LWIP_TCP_SND_BUF 8192
#define RT_LWIP_TCP_WND 8192

#define RT_LWIP_TCPTHREAD_PRIORITY	3
#define RT_LWIP_TCPTHREAD_MBOX_SIZE	4
#define RT_LWIP_TCPTHREAD_STACKSIZE	1024

#define RT_LWIP_ETHTHREAD_PRIORITY	5
#define RT_LWIP_ETHTHREAD_MBOX_SIZE	4
#define RT_LWIP_ETHTHREAD_STACKSIZE	512

// #define SO_REUSE 1
#define LWIP_SO_RCVTIMEO 1
#define LWIP_SO_SNDTIMEO 1
#define LWIP_NETIF_LOOPBACK 0
```

1.LWIP2.0.2版本静态RAM占用差异很大
```
1.3.2：Program Size: Code=61200 RO-data=3228 RW-data=616 ZI-data=31672  
1.4.1：Program Size: Code=77908 RO-data=4928 RW-data=592 ZI-data=30424  
2.0.2：Program Size: Code=83972 RO-data=5764 RW-data=632 ZI-data=37288  
```
2.基于同一份代码，仅仅开关LWIP的版本不一样，导致TCP client连接在1.4.1上连接不了。2.0.2版本上正常，并且压力测试两天了没有任何异常。
一下是LOG:
2.0.2log:
```
 \ | /
- RT -     Thread Operating System
 / | \     3.0.4 build May 29 2018
 2006 - 2018 Copyright by rt-thread team
eth_device_init success
create phy thread successed
eth hardware init sucess...
eth hardware start success...
lwIP-2.0.2 initialized!
192.168.1.30
network interface: e0 (Default)
MTU: 1500
MAC: 00 80 e1 18 2a 25 
FLAGS: UP LINK_DOWN ETHARP
ip address: 192.168.1.30
gw address: 192.168.1.1
net mask  : 255.255.255.0
link up 100Mbps full-duplex
eth hardware init sucess...
eth hardware start success...
send total:1024 bytes, read total:1024 bytes
send total:2048 bytes, read total:2048 bytes
send total:3072 bytes, read total:3072 bytes
send total:4096 bytes, read total:4096 bytes
send total:5120 bytes, read total:5120 bytes
send total:6144 bytes, read total:6144 bytes
send total:7168 bytes, read total:7168 bytes
```

1.4.1log:
```
 \ | /
- RT -     Thread Operating System
 / | \     3.0.4 build May 29 2018
 2006 - 2018 Copyright by rt-thread team
eth_device_init success
create phy thread successed
eth hardware init sucess...
eth hardware start success...
lwIP-1.4.1 initialized!
192.168.1.30
network interface: e0 (Default)
MTU: 1500
MAC: 00 80 e1 18 2a 25 
FLAGS: UP LINK_UP ETHARP
ip address: 192.168.1.30
gw address: 192.168.1.1
net mask  : 255.255.255.0
RX err =-3
link up 100Mbps full-duplex
eth hardware init sucess...
eth hardware start success...
RX err =-3
RX err =-3
RX err =-3
RX err =-3
****************************************
Connect fail!
****************************************
****************************************
Connect fail!
****************************************
```