tcp_sendmsg working

[linux lover]

hello,
how tcp_sendmsg add message from application layer to
socket buffer skb? 

i am unable to find message field in msghdr help me.
struct msghdr {
        void    *       msg_name;       /* Socket name
                 
*/
        int             msg_namelen;    /* Length of
name               
*/
        struct iovec *  msg_iov;        /* Data blocks
                 
*/
        __kernel_size_t msg_iovlen;     /* Number of
blocks             
*/
        void    *       msg_control;    /* Per
protocol magic (eg BSD 
file descriptor passing) */
        __kernel_size_t msg_controllen; /* Length of
cmsg list */
        unsigned        msg_flags;
};
also what is use of struct iovec? is that store actual
data? if yes then how that is included in socket
buffer?

regards,
linux_lover



__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
-
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html