cyswin/socket.h:

struct msghdr
{
        void    *       msg_name;       /* Socket name                  */
        int             msg_namelen;    /* Length of name               */
        struct iovec *  msg_iov;        /* Data blocks                  */
        int             msg_iovlen;     /* Number of blocks             */
        void    *       msg_accrights;  /* Per protocol magic (eg BSD file 
descriptor passing) */
        int             msg_accrightslen;       /* Length of rights list */
};

http://www.opengroup.org/onlinepubs/009695399/basedefs/sys/socket.h.html:

void          *msg_name        Optional address. 
socklen_t      msg_namelen     Size of address. 
struct iovec  *msg_iov         Scatter/gather array. 
int            msg_iovlen      Members in msg_iov. 
void          *msg_control     Ancillary data; see below. 
socklen_t      msg_controllen  Ancillary data buffer len. 
int            msg_flags       Flags on received message.

problems:

1. msg_flags is missing
2. msg_control is renamed msg_accrights
3. msg_controllen is renamed msg_accrightslen

-- 
Sam Steingold (http://www.podval.org/~sds) running w2k
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