Skip to content

Commit

Permalink
netfilter: ctnetlink: use nlmsg_* helper function to build messages
Browse files Browse the repository at this point in the history 
Replaces the old macros to build Netlink messages with the
new nlmsg_*() helper functions.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  • Loading branch information
Pablo Neira Ayuso authored and pablo committed Jun 2, 2009
1 parent f2f3e38 commit 96bcf93
Showing 1 changed file with 42 additions and 42 deletions.
84 changes: 42 additions & 42 deletions net/netfilter/nf_conntrack_netlink.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -353,13 +353,14 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
struct nlattr *nest_parms;
unsigned char *b = skb_tail_pointer(skb);
unsigned int flags = pid ? NLM_F_MULTI : 0;

event |= NFNL_SUBSYS_CTNETLINK << 8;
nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;

nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = nf_ct_l3num(ct);
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = 0;
Expand Down Expand Up @@ -392,12 +393,12 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
ctnetlink_dump_nat_seq_adj(skb, ct) < 0)
goto nla_put_failure;

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
nlmsg_end(skb, nlh);
return skb->len;

nlmsg_failure:
nla_put_failure:
nlmsg_trim(skb, b);
nlmsg_cancel(skb, nlh);
return -1;
}

Expand Down Expand Up @@ -431,7 +432,7 @@ ctnetlink_alloc_skb(const struct nf_conntrack_tuple *tuple, gfp_t gfp)
#define NLA_TYPE_SIZE(type) nla_total_size(sizeof(type))

/* proto independant part */
len = NLMSG_SPACE(sizeof(struct nfgenmsg))
len = NLMSG_ALIGN(sizeof(struct nfgenmsg))
+ 3 * nla_total_size(0) /* CTA_TUPLE_ORIG|REPL|MASTER */
+ 3 * nla_total_size(0) /* CTA_TUPLE_IP */
+ 3 * nla_total_size(0) /* CTA_TUPLE_PROTO */
Expand Down Expand Up @@ -471,7 +472,7 @@ ctnetlink_alloc_skb(const struct nf_conntrack_tuple *tuple, gfp_t gfp)
len += l4proto->nla_size;
rcu_read_unlock();

return alloc_skb(len, gfp);
return nlmsg_new(len, gfp);
}

static int ctnetlink_conntrack_event(struct notifier_block *this,
Expand All @@ -484,7 +485,6 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
struct nf_conn *ct = item->ct;
struct sk_buff *skb;
unsigned int type;
sk_buff_data_t b;
unsigned int flags = 0, group;

/* ignore our fake conntrack entry */
Expand Down Expand Up @@ -512,13 +512,12 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
if (!skb)
goto errout;

b = skb->tail;

type |= NFNL_SUBSYS_CTNETLINK << 8;
nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;

nlh->nlmsg_flags = flags;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = nf_ct_l3num(ct);
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = 0;
Expand Down Expand Up @@ -582,12 +581,13 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
#endif
rcu_read_unlock();

nlh->nlmsg_len = skb->tail - b;
nlmsg_end(skb, nlh);
nfnetlink_send(skb, item->pid, group, item->report);
return NOTIFY_DONE;

nla_put_failure:
rcu_read_unlock();
nlmsg_cancel(skb, nlh);
nlmsg_failure:
kfree_skb(skb);
errout:
Expand All @@ -609,7 +609,7 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
struct nf_conn *ct, *last;
struct nf_conntrack_tuple_hash *h;
struct hlist_nulls_node *n;
struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
u_int8_t l3proto = nfmsg->nfgen_family;

rcu_read_lock();
Expand Down Expand Up @@ -789,7 +789,7 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
struct nf_conn *ct;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u_int8_t u3 = nfmsg->nfgen_family;
int err = 0;

Expand Down Expand Up @@ -844,7 +844,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
struct nf_conntrack_tuple tuple;
struct nf_conn *ct;
struct sk_buff *skb2 = NULL;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u_int8_t u3 = nfmsg->nfgen_family;
int err = 0;

Expand All @@ -869,8 +869,8 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
ct = nf_ct_tuplehash_to_ctrack(h);

err = -ENOMEM;
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2) {
skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (skb2 == NULL) {
nf_ct_put(ct);
return -ENOMEM;
}
Expand Down Expand Up @@ -1322,7 +1322,7 @@ ctnetlink_new_conntrack(struct sock *ctnl, struct sk_buff *skb,
{
struct nf_conntrack_tuple otuple, rtuple;
struct nf_conntrack_tuple_hash *h = NULL;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u_int8_t u3 = nfmsg->nfgen_family;
int err = 0;

Expand Down Expand Up @@ -1504,26 +1504,27 @@ ctnetlink_exp_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
{
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
unsigned char *b = skb_tail_pointer(skb);
unsigned int flags = pid ? NLM_F_MULTI : 0;

event |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
nlh = NLMSG_PUT(skb, pid, seq, event, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh = nlmsg_put(skb, pid, seq, event, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;

nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = exp->tuple.src.l3num;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = 0;

if (ctnetlink_exp_dump_expect(skb, exp) < 0)
goto nla_put_failure;

nlh->nlmsg_len = skb_tail_pointer(skb) - b;
nlmsg_end(skb, nlh);
return skb->len;

nlmsg_failure:
nla_put_failure:
nlmsg_trim(skb, b);
nlmsg_cancel(skb, nlh);
return -1;
}

Expand All @@ -1537,7 +1538,6 @@ static int ctnetlink_expect_event(struct notifier_block *this,
struct nf_conntrack_expect *exp = item->exp;
struct sk_buff *skb;
unsigned int type;
sk_buff_data_t b;
int flags = 0;

if (events & IPEXP_NEW) {
Expand All @@ -1550,17 +1550,16 @@ static int ctnetlink_expect_event(struct notifier_block *this,
!nfnetlink_has_listeners(NFNLGRP_CONNTRACK_EXP_NEW))
return NOTIFY_DONE;

skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC);
if (!skb)
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (skb == NULL)
goto errout;

b = skb->tail;

type |= NFNL_SUBSYS_CTNETLINK_EXP << 8;
nlh = NLMSG_PUT(skb, item->pid, 0, type, sizeof(struct nfgenmsg));
nfmsg = NLMSG_DATA(nlh);
nlh = nlmsg_put(skb, item->pid, 0, type, sizeof(*nfmsg), flags);
if (nlh == NULL)
goto nlmsg_failure;

nlh->nlmsg_flags = flags;
nfmsg = nlmsg_data(nlh);
nfmsg->nfgen_family = exp->tuple.src.l3num;
nfmsg->version = NFNETLINK_V0;
nfmsg->res_id = 0;
Expand All @@ -1570,12 +1569,13 @@ static int ctnetlink_expect_event(struct notifier_block *this,
goto nla_put_failure;
rcu_read_unlock();

nlh->nlmsg_len = skb->tail - b;
nlmsg_end(skb, nlh);
nfnetlink_send(skb, item->pid, NFNLGRP_CONNTRACK_EXP_NEW, item->report);
return NOTIFY_DONE;

nla_put_failure:
rcu_read_unlock();
nlmsg_cancel(skb, nlh);
nlmsg_failure:
kfree_skb(skb);
errout:
Expand All @@ -1595,7 +1595,7 @@ ctnetlink_exp_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = &init_net;
struct nf_conntrack_expect *exp, *last;
struct nfgenmsg *nfmsg = NLMSG_DATA(cb->nlh);
struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
struct hlist_node *n;
u_int8_t l3proto = nfmsg->nfgen_family;

Expand Down Expand Up @@ -1648,7 +1648,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp;
struct sk_buff *skb2;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u_int8_t u3 = nfmsg->nfgen_family;
int err = 0;

Expand Down Expand Up @@ -1679,8 +1679,8 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
}

err = -ENOMEM;
skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
if (!skb2)
skb2 = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (skb2 == NULL)
goto out;

rcu_read_lock();
Expand Down Expand Up @@ -1708,7 +1708,7 @@ ctnetlink_del_expect(struct sock *ctnl, struct sk_buff *skb,
struct nf_conntrack_expect *exp;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_helper *h;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct hlist_node *n, *next;
u_int8_t u3 = nfmsg->nfgen_family;
unsigned int i;
Expand Down Expand Up @@ -1849,7 +1849,7 @@ ctnetlink_new_expect(struct sock *ctnl, struct sk_buff *skb,
{
struct nf_conntrack_tuple tuple;
struct nf_conntrack_expect *exp;
struct nfgenmsg *nfmsg = NLMSG_DATA(nlh);
struct nfgenmsg *nfmsg = nlmsg_data(nlh);
u_int8_t u3 = nfmsg->nfgen_family;
int err = 0;

Expand Down

0 comments on commit 96bcf93

Please sign in to comment.