Difference between revisions of "OSWORD &C0"
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Revision as of 02:13, 8 March 2015
OSWORD &C0 (192) - IP Networking and DNS Resolver
Contents
Specification
On entry:
XY?0 = send block length
XY?1 = receive block length
XY?2 = command, 0-63=Socket, 64-127=Resolver, 128-255=Reserved
XY?3 = 0, returns 0 or error value
XY!4 = socket
XY!8 =>data
XY!12 = data length
XY!16 = flags
XY!20 =>IP address
XY!24 = IP address length, if zero, X%!20 = IPv4 address
On exit:
XY?2 = 0 if call supported, unchanged if call unsupported or no handler present
XY?3 = 0 or returned error
XY!4 onwards: any returned data
Memory pointed to by XY!8 on entry may be modified
Socket Commands
Commands passed in XY?2 are those in the RISC OS Socket_ SWIs, that is:
&00 Socket_Creat X%!4=domain, X%!8=type, X%!12=protocol &01 Socket_Bind X%!4=sock, X%!8=name, X%!12=namelen &02 Socket_Listen X%!4=sock, X%!8=backlog &03 Socket_Accept X%!4=sock, X%!8=addr, X%!12=len &04 Socket_Connect X%!4=sock, X%!8=name, X%!12=namelen &05 Socket_Recv X%!4=sock, X%!8=buf, X%!12=len, X%!16=flags &06 Socket_Recvfrom X%!4=sock, X%!8=buf, X%!12=len, X%!16=flags, X%!16=from, X%!20=fromlen &07 Socket_Recvmsg X%!4=sock, X%!8=msg, X%!12=flags &08 Socket_Send X%!4=sock, X%!8=msg, X%!12=len, X%!16=flags &09 Socket_Sendto X%!4=sock, X%!8=msg, X%!12=len, X%!16=flags, X%!16=to, X%!20=tolen &0A Socket_Sendmsg X%!4=sock, X%!8=msg, X%!12=flags &0B Socket_Shutdown X%!4=sock, X%!8=how &0C Socket_Setsockopt X%!4=sock, X%!8=level, X%!12=optname, X%!16=optval, X%!16=optlen &0D Socket_Getsockopt X%!4=sock, X%!8=level, X%!12=optname, X%!16=optval, X%!16=optlen &0E Socket_Getpeername X%!4=sock, X%!8=name, X%!12=namelen &0F Socket_Getsockname X%!4=sock, X%!8=name, X%!12=namelen &10 Socket_Close X%!4=sock &11 Socket_Select X%!4=nfds, X%!8=readfds, X%!12=writefds, X%!16=exceptfds, X%!16=timeout &12 Socket_Ioctl X%!4=sock, X%!8=request, X%!12=argp &13 Socket_Read X%!4=sock, X%!8=buf, X%!12=num &14 Socket_Write X%!4=sock, X%!8=buf, X%!12=num &15 Socket_Stat X%!4=sock, X%!8=buf &16 Socket_Readv X%!4=sock, X%!8=iov, X%!12=iovcnt &17 Socket_Writev X%!4=sock, X%!8=iov, X%!12=iovcnt
Coding
The following is a BASIC Sockets library:
REM > BLib.Socket DEFFNSocket_Open( X%!4, X%!8, X%!12):A%=0 DEFFNSocket_Bind( X%!4, X%!8, X%!12):A%=1 DEFFNSocket_Listen( X%!4, X%!8) :A%=2 DEFFNSocket_Accept( X%!4, X%!8, X%!12):A%=3 DEFFNSocket_Connect(X%!4, X%!8, X%!12):A%=4 DEFFNSocket_Read( X%!4, X%!8, X%!12):A%=5 DEFFNSocket_Write( X%!4, X%!8, X%!12):A%=8 DEFFNSocket_Close( X%!4) :A%=16 !X%=&814:X%?2=A%:A%=192:CALL &FFF1:IFX%?3:=-X%?3 ELSE =X%!4
The calls return a negative number if the call fails, or a positive number (or zero) if the call succeeds, being the returned socket number or byte count, etc.
Specification
On entry:
XY?0 = send block length
XY?1 = receive block length
XY?2 = command, 0-63=Socket, 64-127=Resolver, 128-255=Reserved
XY?3 = 0, returns 0 or error value
XY!4 => host name
On exit:
XY?2 = 0 if call supported, unchanged if call unsupported or no handler present
XY?3 = 0 or returned error
XY!4 onwards: any returned data
Resolver Commands
Commands passed in XY?2 are those in the RISC OS Resolver_ SWIs plus &40, that is:
&40 Resolver_GetHostByName
On entry: X%!4=>name,
On exit: X%!4=>name, X%!8=>aliases, X%!12=>type, X%!16=length, X%!20=>IP addresses
&41 Resolver_GetHost
On entry: X%!4=>name,
On exit: X%!4=>name, X%!8=>aliases, X%!12=>type, X%!16=length, X%!20=>IP addresses
Coding
The following is a BASIC Resolver library:
REM > BLib.DNS DEFFNDNS_GetHostByName(A$):A%=64 DEFFNDNS_GetHost( A$):A%=65 !X%=&1808:X%?2=A%:X%!4=name%:$name%=A$:A%=192:CALL&FFF1:=X%+4 AND X%?3=0
The calls return zero if the call fails, or the address of an inet address structure.
See Also
- http://mdfs.net/Docs/Comp/BBC/Network/Sockets
- http://mdfs.net/Docs/Comp/BBC/Oswords
- http://mdfs.net/Docs/Comp/BBC/Network
- http://mdfs.net/Archive/BBCMicro/2009/08/03/014013.htm
Jgharston 01:36, 19 December 2010 (UTC)
