tree 2134ee450c7e323ce5e52f394cd845363cf7b925
parent 895992619d521e987d25644ad859adef7e8d646b
author Willy Tarreau <w@1wt.eu> 1600184516 +0200
committer Willy Tarreau <w@1wt.eu> 1600286888 +0200
encoding latin1

MEDIUM: tools: make str2sa_range() resolve pre-bound listeners

When str2sa_range() is invoked for a bind or log line, and it gets a file
descriptor number, it will immediately resolve the socket's address (when
it's a socket) so that the address family, address and port are correctly
set. This will later allow to resolve some transport protocols that are
attached to existing FDs. For raw FDs (e.g. logs) and for socket pairs,
the FD number is still returned in the address, because we need the
underlying address management to complete the bind/listen/connect/whatever
needed. One immediate benefit is that passing a bad FD will now result in
one of these errors:

  'bind' : cannot use file descriptor '3' : Socket operation on non-socket.
  'bind' : socket on file descriptor '3' is of the wrong type.

Note that as of now, we never return a listening socket with a family of
AF_CUST_EXISTING_FD. The only case where this family is seen is for a raw
FD (e.g. logs).