On 9 April 2014 16:59, Sean P. DeNigris <sean@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.