On 9 April 2014 16:59, Sean P. DeNigris <s...@clipperadams.com> wrote:
> How do Socket handles map to C socket IDs? I'm wrapping libssh2 via Native
> Boost and I'd much rather create sockets via Smalltalk than C, but I'm not
> sure how to pass the handle to a C function expecting a C socket ID. Maybe
> I'm missing something really simple? Thanks.
>
>
socket plugin using own data structure for socket handles,
it includes different kind of internal information, including OS-specific
socket handle.
typedef struct
{
int sessionID;
int socketType; /* 0 = TCP, 1 = UDP */
void *privateSocketPtr;
} SQSocket, *SocketPtr;
extracting the OS-specific handle could be problematic, since it is in
that opaque void *privateSocketPtr; field.
Then:
sqUnixSocket.c
typedef struct privateSocketStruct
{
int s; /* Unix socket */
int connSema; /* connection io notification semaphore */
int readSema; /* read io notification semaphore */
int writeSema; /* write io notification semaphore */
int sockState; /* connection + data state */
int sockError; /* errno after socket error */
union sockaddr_any peer; /* default send/recv address for UDP */
socklen_t peerSize; /* dynamic sizeof(peer) */
union sockaddr_any sender; /* sender address for last UDP receive */
socklen_t senderSize; /* dynamic sizeof(sender) */
int multiListen; /* whether to listen for multiple connections */
int acceptedSock; /* a connection that has been accepted */
} privateSocketStruct;
so, to extract OS-level socked handle *on unix*, you have to
handle = ( (privateSocketStruct*) sqsocket.privateSocketPtr) -> s.
where sqsocket is SQSocket.
there's even macros for that:
/*** Accessors for private socket members from a Squeak socket pointer ***/
#define _PSP(S) (((S)->privateSocketPtr))
#define PSP(S) ((privateSocketStruct *)((S)->privateSocketPtr))
#define SOCKET(S) (PSP(S)->s)
#define SOCKETSTATE(S) (PSP(S)->sockState)
#define SOCKETERROR(S) (PSP(S)->sockError)
#define SOCKETPEER(S) (PSP(S)->peer)
#define SOCKETPEERSIZE(S) (PSP(S)->peerSize)
>
> -----
> Cheers,
> Sean
> --
> View this message in context:
> http://forum.world.st/Socket-Handles-to-C-tp4753619.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>
>
--
Best regards,
Igor Stasenko.
