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new function nfnl_queue_msg_send_verdict_payload()

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nfnl_queue_msg_send_verdict_payload() will to send the verdict, mark,
and possibly changed payload through the netlink socket.

Add a few docbook comments in other funcs.

Signed-off-by: Karl Hiramoto <karl@hiramoto.org>
This commit is contained in:
Karl Hiramoto 2010-02-24 21:29:14 +01:00 • committed by Thomas Graf
parent 27c505eb89
commit cafdaa4e06
3 changed files with 65 additions and 1 deletions
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4
include/netlink/netfilter/queue_msg.h
View file

@ -93,7 +93,9 @@ extern unsigned int nfnl_queue_msg_get_verdict(const struct nfnl_queue_msg *);
extern struct nl_msg * nfnl_queue_msg_build_verdict(const struct nfnl_queue_msg *);
extern int nfnl_queue_msg_send_verdict(struct nl_sock *,
const struct nfnl_queue_msg *);
extern int nfnl_queue_msg_send_verdict_payload(struct nl_sock *,
const struct nfnl_queue_msg *,
const void *, unsigned );
#ifdef __cplusplus
}
#endif

52
lib/netfilter/queue_msg.c
View file

@ -7,6 +7,7 @@
* of the License.
*
* Copyright (c) 2007, 2008 Patrick McHardy <kaber@trash.net>
* Copyright (c) 2010 Karl Hiramoto <karl@hiramoto.org>
*/
/**
@ -189,6 +190,12 @@ nla_put_failure:
return NULL;
}
/**
* Send a message verdict/mark
* @arg nlh netlink messsage header
* @arg msg queue msg
* @return 0 on OK or error code
*/
int nfnl_queue_msg_send_verdict(struct nl_sock *nlh,
const struct nfnl_queue_msg *msg)
{
@ -206,6 +213,51 @@ int nfnl_queue_msg_send_verdict(struct nl_sock *nlh,
return wait_for_ack(nlh);
}
/**
* Send a message verdict including the payload
* @arg nlh netlink messsage header
* @arg msg queue msg
* @arg payload_data packet payload data
* @arg payload_len payload length
* @return 0 on OK or error code
*/
int nfnl_queue_msg_send_verdict_payload(struct nl_sock *nlh,
const struct nfnl_queue_msg *msg,
const void *payload_data, unsigned payload_len)
{
struct nl_msg *nlmsg;
int err;
struct iovec iov[3];
struct nlattr nla;
nlmsg = nfnl_queue_msg_build_verdict(msg);
if (nlmsg == NULL)
return -NLE_NOMEM;
memset(iov, 0, sizeof(iov));
iov[0].iov_base = (void *) nlmsg_hdr(nlmsg);
iov[0].iov_len = nlmsg_hdr(nlmsg)->nlmsg_len;
nla.nla_type = NFQA_PAYLOAD;
nla.nla_len = payload_len + sizeof(nla);
nlmsg_hdr(nlmsg)->nlmsg_len += nla.nla_len;
iov[1].iov_base = (void *) &nla;
iov[1].iov_len = sizeof(nla);
iov[2].iov_base = (void *) payload_data;
iov[2].iov_len = NLA_ALIGN(payload_len);
nl_auto_complete(nlh, nlmsg);
err = nl_send_iovec(nlh, nlmsg, iov, 3);
nlmsg_free(nlmsg);
if (err < 0)
return err;
return wait_for_ack(nlh);
}
#define NFNLMSG_QUEUE_TYPE(type) NFNLMSG_TYPE(NFNL_SUBSYS_QUEUE, (type))
static struct nl_cache_ops nfnl_queue_msg_ops = {
.co_name = "netfilter/queue_msg",

10
lib/netfilter/queue_msg_obj.c
View file

@ -197,6 +197,11 @@ uint16_t nfnl_queue_msg_get_group(const struct nfnl_queue_msg *msg)
return msg->queue_msg_group;
}
/**
* Set the protocol family
* @arg msg NF queue message
* @arg family AF_XXX address family example: AF_INET, AF_UNIX, etc
*/
void nfnl_queue_msg_set_family(struct nfnl_queue_msg *msg, uint8_t family)
{
msg->queue_msg_family = family;
@ -424,6 +429,11 @@ const void *nfnl_queue_msg_get_payload(const struct nfnl_queue_msg *msg, int *le
return msg->queue_msg_payload;
}
/**
* Return the number of items matching a filter in the cache
* @arg msg queue msg
* @arg verdict NF_DROP, NF_ACCEPT, NF_REPEAT, etc
*/
void nfnl_queue_msg_set_verdict(struct nfnl_queue_msg *msg,
unsigned int verdict)
{