Commit Graph

2 Commits

Author SHA1 Message Date
Molly Miller
dff0f1da43 network: Retrieve AF_* magic constants from C support code.
The Network.Socket.Data code previously used hardcoded constants manually read
from auto-generated C source code, however these constants are specific to
Linux. The original code looked like this:

    export
    ToCode SocketFamily where
      -- Don't know how to read a constant value from C code in idris2...
      -- gotta to hardcode those for now
      toCode AF_UNSPEC = 0 -- unsafePerformIO (cMacro "#AF_UNSPEC" Int)
      toCode AF_UNIX   = 1
      toCode AF_INET   = 2
      toCode AF_INET6  = 10

The AF_INET6 constant is correct on my Debian 10 laptop:

    molly on flywheel ~> grep -rE '^#define AF_INET6' /usr/include
    /usr/include/x86_64-linux-gnu/bits/socket.h:#define AF_INET6	PF_INET6
    molly on flywheel ~> grep -rE '^#define PF_INET6' /usr/include
    /usr/include/x86_64-linux-gnu/bits/socket.h:#define PF_INET6    10  /* IP version 6.  */

However, this is not the case on an OpenBSD machine:

    spanner# grep -rE '^#define[[:space:]]+AF_INET6' /usr/include
    /usr/include/sys/socket.h:#define	AF_INET6	24		/* IPv6 */

This commit adds accessor functions to the C runtime support library for
retrieving the values of these macros as they appear in the system libc header
files, which can then be invoked using the normal C FFI machinery.
2020-10-01 12:05:42 +01:00
Edwin Brady
e17f66244a Move network support to libidris2_support
This makes the support stuff much simpler, and also makes the racket
bootstrap process easier
2020-05-23 15:52:33 +01:00