int __callback(struct nlmsghdr *nlh, struct nfattr *nfa[], void *data)
{
int ret = NFNL_CB_STOP;
unsigned int type;
struct nf_conntrack *ct;
int len = nlh->nlmsg_len;
struct __data_container *container = data;
len -= NLMSG_LENGTH(sizeof(struct nfgenmsg));
if (len < 0)
return NFNL_CB_CONTINUE;
type = __parse_message_type(nlh);
if (!(type & container->type))
return NFNL_CB_CONTINUE;
ct = nfct_new();
if (!ct)
return NFNL_CB_CONTINUE;
__parse_conntrack(nlh, (const struct nfattr **)nfa, ct);
if (container->h->cb)
ret = container->h->cb(type, ct, container->data);
else if (container->h->cb2)
ret = container->h->cb2(nlh, type, ct, container->data);
switch(ret) {
case NFCT_CB_FAILURE:
free(ct);
ret = NFNL_CB_FAILURE;
break;
case NFCT_CB_STOP:
free(ct);
ret = NFNL_CB_STOP;
break;
case NFCT_CB_CONTINUE:
free(ct);
ret = NFNL_CB_CONTINUE;
break;
case NFCT_CB_STOLEN:
ret = NFNL_CB_CONTINUE;
break;
}
return ret;
}
int __expect_callback(struct nlmsghdr *nlh, struct nfattr *nfa[], void *data)
{
int ret = NFNL_CB_STOP;
unsigned int type;
struct nf_expect *exp;
int len = nlh->nlmsg_len;
struct __data_container *container = data;
len -= NLMSG_LENGTH(sizeof(struct nfgenmsg));
if (len < 0)
return NFNL_CB_CONTINUE;
type = __parse_message_type(nlh);
if (!(type & container->type))
return NFNL_CB_CONTINUE;
exp = nfexp_new();
if (!exp)
return NFNL_CB_CONTINUE;
__parse_expect(nlh, nfa, exp);
if (container->h->expect_cb)
ret = container->h->expect_cb(type, exp, container->data);
switch(ret) {
case NFCT_CB_FAILURE:
free(exp);
ret = NFNL_CB_FAILURE;
break;
case NFCT_CB_STOP:
free(exp);
ret = NFNL_CB_STOP;
break;
case NFCT_CB_CONTINUE:
free(exp);
ret = NFNL_CB_CONTINUE;
break;
case NFCT_CB_STOLEN:
ret = NFNL_CB_CONTINUE;
break;
}
return ret;
}
