File list (Check if you may need any files):
LwIP
....\api
....\...\api_lib.c
....\...\api_msg.c
....\...\CVS
....\...\...\Entries
....\...\...\Repository
....\...\...\Root
....\...\...\Tag
....\...\...\Template
....\...\err.c
....\...\sockets.c
....\...\tcpip.c
....\app_interface
....\.............\app_interface_socket.c
....\.............\app_interface_socket.h
....\arch
....\....\sys_arch.c
....\core
....\....\CVS
....\....\...\Entries
....\....\...\Repository
....\....\...\Root
....\....\...\Tag
....\....\...\Template
....\....\dhcp.c
....\....\inet.c
....\....\inet6.c
....\....\ipv4
....\....\....\CVS
....\....\....\...\Entries
....\....\....\...\Repository
....\....\....\...\Root
....\....\....\...\Tag
....\....\....\...\Template
....\....\....\icmp.c
....\....\....\ip.c
....\....\....\ip_addr.c
....\....\....\ip_frag.c
....\....\ipv6
....\....\....\CVS
....\....\....\...\Entries
....\....\....\...\Repository
....\....\....\...\Root
....\....\....\...\Tag
....\....\....\...\Template
....\....\....\icmp6.c
....\....\....\ip6.c
....\....\....\ip6_addr.c
....\....\....\README
....\....\mem.c
....\....\memp.c
....\....\netif.c
....\....\pbuf.c
....\....\raw.c
....\....\stats.c
....\....\sys.c
....\....\tcp.c
....\....\tcp_in.c
....\....\tcp_out.c
....\....\udp.c
....\include
....\.......\arch
....\.......\....\cc.h
....\.......\....\perf.h
....\.......\....\sys_arch.h
....\.......\CVS
....\.......\...\Entries
....\.......\...\Repository
....\.......\...\Root
....\.......\...\Tag
....\.......\...\Template
....\.......\ipv4
....\.......\....\CVS
....\.......\....\...\Entries
....\.......\....\...\Repository
....\.......\....\...\Root
....\.......\....\...\Tag
....\.......\....\...\Template
....\.......\....\lwip
....\.......\....\....\CVS
....\.......\....\....\...\Entries
....\.......\....\....\...\Repository
....\.......\....\....\...\Root
....\.......\....\....\...\Tag
....\.......\....\....\...\Template
....\.......\....\....\icmp.h
....\.......\....\....\inet.h
....\.......\....\....\ip.h
....\.......\....\....\ip_addr.h
....\.......\....\....\ip_frag.h
....\.......\ipv6
....\.......\....\CVS
....\.......\....\...\Entries
....\.......\....\...\Repository
....\.......\....\...\Root
....\.......\....\...\Tag
....\.......\....\...\Template
....\.......\....\lwip
....\.......\....\....\CVS