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libnl: nfqueue: add nfqueue specific socket allocation function

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commit e92539843a0c7e5116254382626cce226bf2135e
Author: Patrick McHardy <kaber@trash.net>
Date:   Thu Oct 23 13:46:16 2008 +0200

    libnl: nfqueue: add nfqueue specific socket allocation function

    nfqueue users usually send verdict messages from the receive callback.
    When waiting for ACKs, the receive callback might be called again
    recursively until the stack blows up.

    Add a nfqueue specific socket allocation function that automatically
    disables ACKing for the socket.

    Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Patrick McHardy 2008-10-23 13:47:08 +02:00 • committed by Thomas Graf
parent cfcfca0703
commit 334f551c59
3 changed files with 16 additions and 1 deletions
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2
include/netlink/netfilter/queue.h
View file

@ -31,6 +31,8 @@ enum nfnl_queue_copy_mode {
};
/* General */
extern struct nl_sock * nfnl_queue_socket_alloc(void);
extern struct nfnl_queue * nfnl_queue_alloc(void);
extern void nfnl_queue_get(struct nfnl_queue *);

10
lib/netfilter/queue.c
View file

@ -24,6 +24,16 @@
#include <netlink/netfilter/nfnl.h>
#include <netlink/netfilter/queue.h>
struct nl_sock *nfnl_queue_socket_alloc(void)
{
struct nl_sock *nlsk;
nlsk = nl_socket_alloc();
if (nlsk)
nl_socket_disable_auto_ack(nlsk);
return nlsk;
}
static int send_queue_request(struct nl_sock *sk, struct nl_msg *msg)
{
int err;

5
src/nf-queue.c
View file

@ -47,7 +47,10 @@ int main(int argc, char *argv[])
int err = 1;
int family;
nf_sock = nlt_alloc_socket();
nf_sock = nfnl_queue_socket_alloc();
if (nf_sock == NULL)
fatal(ENOBUFS, "Unable to allocate netlink socket");
nl_disable_sequence_check(nf_sock);
nl_socket_modify_cb(nf_sock, NL_CB_VALID, NL_CB_CUSTOM, event_input, NULL);