main.c
/*
* (C) 2005-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
* Harald Welte <laforge@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <libnfnetlink/libnfnetlink.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include "internal/internal.h"
struct nfct_handle *nfct_open_nfnl(struct nfnl_handle *nfnlh,
uint8_t subsys_id,
unsigned int subscriptions)
{
struct nfct_handle *cth;
cth = malloc(sizeof(struct nfct_handle));
if (!cth)
return NULL;
memset(cth, 0, sizeof(*cth));
cth->nfnlh = nfnlh;
if (subsys_id == 0 || subsys_id == NFNL_SUBSYS_CTNETLINK) {
cth->nfnlssh_ct = nfnl_subsys_open(cth->nfnlh,
NFNL_SUBSYS_CTNETLINK,
IPCTNL_MSG_MAX,
subscriptions);
if (!cth->nfnlssh_ct)
goto out_free;
}
if (subsys_id == 0 || subsys_id == NFNL_SUBSYS_CTNETLINK_EXP) {
cth->nfnlssh_exp = nfnl_subsys_open(cth->nfnlh,
NFNL_SUBSYS_CTNETLINK_EXP,
IPCTNL_MSG_EXP_MAX,
subscriptions);
if (!cth->nfnlssh_exp)
goto out_free;
}
return cth;
out_free:
if (cth->nfnlssh_exp) {
nfnl_subsys_close(cth->nfnlssh_exp);
cth->nfnlssh_exp = NULL;
}
if (cth->nfnlssh_ct) {
nfnl_subsys_close(cth->nfnlssh_ct);
cth->nfnlssh_ct = NULL;
}
free(cth);
return NULL;
}
struct nfct_handle *nfct_open(uint8_t subsys_id, unsigned subscriptions)
{
struct nfnl_handle *nfnlh = nfnl_open();
struct nfct_handle *nfcth;
if (!nfnlh)
return NULL;
nfcth = nfct_open_nfnl(nfnlh, subsys_id, subscriptions);
if (!nfcth)
nfnl_close(nfnlh);
return nfcth;
}
int nfct_close(struct nfct_handle *cth)
{
int err;
if (cth->nfnlssh_exp) {
nfnl_subsys_close(cth->nfnlssh_exp);
cth->nfnlssh_exp = NULL;
}
if (cth->nfnlssh_ct) {
nfnl_subsys_close(cth->nfnlssh_ct);
cth->nfnlssh_ct = NULL;
}
/* required by the new API */
cth->cb = NULL;
cth->cb2 = NULL;
cth->expect_cb = NULL;
cth->expect_cb2 = NULL;
free(cth->nfnl_cb_ct.data);
free(cth->nfnl_cb_exp.data);
cth->nfnl_cb_ct.call = NULL;
cth->nfnl_cb_ct.data = NULL;
cth->nfnl_cb_ct.attr_count = 0;
cth->nfnl_cb_exp.call = NULL;
cth->nfnl_cb_exp.data = NULL;
cth->nfnl_cb_exp.attr_count = 0;
err = nfnl_close(cth->nfnlh);
free(cth);
return err;
}
int nfct_fd(struct nfct_handle *cth)
{
return nfnl_fd(cth->nfnlh);
}
const struct nfnl_handle *nfct_nfnlh(struct nfct_handle *cth)
{
return cth->nfnlh;
}
void __noreturn __abi_breakage(const char *file, int line, const char *reason)
{
fprintf(stderr, "ctnetlink kernel ABI is broken, contact your vendor.\n"
"%s:%d reason: %s\n", file, line, reason);
exit(EXIT_FAILURE);
}
nfct_open
struct nfct_handle * nfct_open(uint8_t subsys_id, unsigned subscriptions)
Definition main.c:84
nfct_close
int nfct_close(struct nfct_handle *cth)
Definition main.c:105
nfct_fd
int nfct_fd(struct nfct_handle *cth)
Definition main.c:144