请问移植lwip时ping不通一般该怎么查？

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有大神路过  指点指点啊    好纠结

另外附个debug所有信息
dns_init: initializing
netif: netmask of interface nterface 1
netif_set_ipaddr: netif address being changed
netif: IP address of interface netif: added interface st IP addr 192.168.1.105 netmask 255.255.255.0 gw 192.168.1.1
netif: setting default interface st
etharp_request: sending ARP request.
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
tcp_bind: bind to port 80
etharp_timer
dns_tmr: dns_check_entries
etharp_timer
dns_tmr: dns_check_entries
etharp_timer
dns_tmr: dns_check_entries
etharp_timer
dns_tmr: dns_check_entries
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found empty entry 0
etharp_find_entry: selecting empty entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
etharp_timer
dns_tmr: dns_check_entries
etharp_timer
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
dns_tmr: dns_check_entries
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64
etharp_timer
dns_tmr: dns_check_entries
pbuf_alloc(length=60)
pbuf_alloc: allocated pbuf 20019d64
pbuf_alloc(length=60) == 20019d64
tcpip_thread: PACKET 200171c8
ethernet_input: dest:ff:ff:ff:ff:ff:ff, src:00:c2:c6:f3:76:40, type:806
pbuf_header: old 20019d74 new 20019d82 (-14)
etharp_update_arp_entry: 192.168.1.104 - 00:c2:c6:f3:76:40
etharp_find_entry: found matching entry 0
etharp_update_arp_entry: updating stable entry 0
etharp_input: incoming ARP request
pbuf_alloc(length=28)
pbuf_alloc(length=28) == 20013e34
etharp_raw: sending raw ARP packet.
pbuf_header: old 20013e54 new 20013e46 (14)
ethernet_output: sending packet 20013e34
pbuf_free(20013e34)
pbuf_free: deallocating 20013e34
pbuf_free(20019d64)
pbuf_free: deallocating 20019d64

求救啊   哪里出问题了
192.168.1.104是我的电脑   后面是ping之后debug出来的信息

求帮看下下面的debug信息   能不能看出来哪里出错？

:'(:'(:'(