On Mon, Dec 25, 2000 at 11:42:04PM +0530, Saibal kumar Adhya wrote:
>
> Hi,
> Can anyone tell when sock structure (include/net/sock.h) is freed
> after application calls shutdown, close system call or tcp gets a
> 'reset'? Thank in advance.
This code is from 2.4.0-test13-pre4.
See, for example, the call to sock_put() (which calls sk_free())
at the bottom of net/ipv4/tcp.c:tcp_close(). tcp_close() takes
a struct sock as an argument and, when all is said and done, it
frees it.
bh_unlock_sock(sk);
local_bh_enable();
sock_put(sk);
tcp_close() is a member of struct proto tcp_prot, which is
defined in net/ipv4/tcp_ipv4.c. tcp_prot is assigned to
sk->prot in net/ipv4/af_inet.c:inet_create().
sk->prot = prot;
net/af_inet.c:inet_release() calls the close function
of the struct sock's struct proto (sk->prot):
sk->prot->close(sk, timeout);
To wrap things up (for an AF_INET, SOCK_STREAM socket), the above
line calls tcp_close(), which calls sock_put(sk), which calls
sk_free().
Hope this helps.
Regards,
Nick Dronen
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