File list (Check if you may need any files):
lwip
....\src
....\...\FILES
....\...\core
....\...\....\sys.c
....\...\....\ipv4
....\...\....\....\inet.c
....\...\....\....\ip_addr.c
....\...\....\....\ip.c
....\...\....\....\inet_chksum.c
....\...\....\....\igmp.c
....\...\....\....\icmp.c
....\...\....\....\CVS
....\...\....\....\...\Entries
....\...\....\....\...\Root
....\...\....\....\...\Template
....\...\....\....\...\Repository
....\...\....\....\ip_frag.c
....\...\....\....\autoip.c
....\...\....\stats.c
....\...\....\snmp
....\...\....\....\msg_out.c
....\...\....\....\mib2.c
....\...\....\....\asn1_dec.c
....\...\....\....\mib_structs.c
....\...\....\....\msg_in.c
....\...\....\....\asn1_enc.c
....\...\....\....\CVS
....\...\....\....\...\Entries
....\...\....\....\...\Root
....\...\....\....\...\Template
....\...\....\....\...\Repository
....\...\....\init.c
....\...\....\tcp_in.c
....\...\....\netif.c
....\...\....\memp.c
....\...\....\mem.c
....\...\....\tcp_out.c
....\...\....\raw.c
....\...\....\ipv6
....\...\....\....\ip6.c
....\...\....\....\README
....\...\....\....\inet6.c
....\...\....\....\ip6_addr.c
....\...\....\....\CVS
....\...\....\....\...\Entries
....\...\....\....\...\Root
....\...\....\....\...\Template
....\...\....\....\...\Repository
....\...\....\....\icmp6.c
....\...\....\dhcp.c
....\...\....\pbuf.c
....\...\....\CVS
....\...\....\...\Entries
....\...\....\...\Root
....\...\....\...\Template
....\...\....\...\Repository
....\...\....\tcp.c
....\...\....\dns.c
....\...\....\udp.c
....\...\api
....\...\...\tcpip.c
....\...\...\api_msg.c
....\...\...\netifapi.c
....\...\...\err.c
....\...\...\netbuf.c
....\...\...\sockets.c
....\...\...\api_lib.c
....\...\...\netdb.c
....\...\...\CVS
....\...\...\...\Entries
....\...\...\...\Root
....\...\...\...\Template
....\...\...\...\Repository
....\...\CVS
....\...\...\Entries
....\...\...\Root
....\...\...\Template
....\...\...\Repository
....\...\include
....\...\.......\lwip
....\...\.......\....\sys.h
....\...\.......\....\api.h
....\...\.......\....\memp.h
....\...\.......\....\pbuf.h
....\...\.......\....\dns.h
....\...\.......\....\raw.h
....\...\.......\....\snmp_msg.h
....\...\.......\....\mem.h
....\...\.......\....\arch.h
....\...\.......\....\netifapi.h
....\...\.......\....\tcp.h
....\...\.......\....\def.h
....\...\.......\....\debug.h
....\...\.......\....\dhcp.h
....\...\.......\....\stats.h
....\...\.......\....\err.h
....\...\.......\....\api_msg.h
....\...\.......\....\snmp.h
....\...\.......\....\sio.h