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65 lines
2.2 KiB
Plaintext
65 lines
2.2 KiB
Plaintext
USING RPC/XDR ON RTEMS
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======================
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For the most part, programmers using RPC/XDR routines on RTEMS
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can proceed as if they were to be using a POSIX/UNIX system.
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The only significant changes are those to start the portmapper
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and to allow use of RPC/XDR by multiple threads.
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Starting the portmapper
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=======================
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The SUN portmapper program has been modified to run as an RTEMS
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task. Applications which need the portmapper can start this
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task by calling:
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int rtems_rpc_start_portmapper (int priority);
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The return value is an RTEMS status code.
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Multi-threaded operation
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========================
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The RPC/XDR package has been modified to allow for multiple RTEMS
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tasks to use RPC/XDR routines. If more than one task is to call
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an RPC/XDR routine, the additional tasks must call:
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int rtems_rpc_task_init(void);
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before calling any RPC/XDR routines. For example, the portmapper
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calls this routine since the portmapper uses RPC/XDR routines in
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a separate thread.
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The return value is an RTEMS status code.
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Porting Notes
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=============
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Most of the FreeBSD rpc library ports to RTEMS with little
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or no modification beyond that required to provide for operation
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in a multitasking environment. Multitasking operation was
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provided by moving all `static persistence' variables into
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a single structure and using an RTEMS task variable to point
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to that structure.
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Some of the library, however, has not made it into the RTEMS
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implementation. FreeBSD source files which have been left out include:
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- Files which provide RPC to the AF_UNIX address family:
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clnt_unix.c
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svc_unix.c
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An `ifndef __rtems__' was added to clnt_generic.c because clnt_unix.c
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was omitted.
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- Files which need NIS:
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auth_time.c
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- Files which provide DES authentication:
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auth_des.c
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authdes_prot.c
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crypt_client.c
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des_crypt.c
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des_soft.c
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getpublickey.c
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key_call.c
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key_prot_xdr.c
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svc_auth_des.c
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The FreeBSD xdr source compiles and runs on RTEMS without modification.
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The original source was obtained from:
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ftp://ftp.FreeBSD.org/pub/FreeBSD/
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branches/4.0-stable/src/lib/libc/rpc
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branches/4.0-stable/src/lib/libc/xdr
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branches/4.0-stable/src/include/rpc
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branches/4.0-stable/src/include/rpcsvc
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