gatling is a server which supports HTTP, FTP and SMB. Pretty useful for ad hoc file transfers. It'll only serve o=r files. The cwd of your shell becomes the servers root directory per default.
Download gatling - Static linked. libc. No TLS support. 780K (The site claims a size of 125k but this is only (almost) true when linked against dietlibc.) gatling.sig
I did it, and works ok. There are some differences if you run it from root or from user account. Ports are different and samba is available only with root.
Anyway, it is pretty descriptive with good help, so it is very easy to figure out a proper working method to fit your needs.
