From 2c62e0bc685fcb400a0b5cffb39860290bc902a8 Mon Sep 17 00:00:00 2001 From: Gao Feng Date: Tue, 28 Mar 2017 09:52:52 +0800 Subject: netfilter: ctnetlink: Expectations must have a conntrack helper area The expect check function __nf_ct_expect_check() asks the master_help is necessary. So it is unnecessary to go ahead in ctnetlink_alloc_expect when there is no help. Actually the commit bc01befdcf3e ("netfilter: ctnetlink: add support for user-space expectation helpers") permits ctnetlink create one expect even though there is no master help. But the latter commit 3d058d7bc2c5 ("netfilter: rework user-space expectation helper support") disables it again. Signed-off-by: Gao Feng Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_netlink.c | 27 ++++++++------------------- 1 file changed, 8 insertions(+), 19 deletions(-) (limited to 'net/netfilter/nf_conntrack_netlink.c') diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index ecdc324c7785..cd0a6d270ebe 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -3038,6 +3038,10 @@ ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, struct nf_conn_help *help; int err; + help = nfct_help(ct); + if (!help) + return ERR_PTR(-EOPNOTSUPP); + if (cda[CTA_EXPECT_CLASS] && helper) { class = ntohl(nla_get_be32(cda[CTA_EXPECT_CLASS])); if (class > helper->expect_class_max) @@ -3047,26 +3051,11 @@ ctnetlink_alloc_expect(const struct nlattr * const cda[], struct nf_conn *ct, if (!exp) return ERR_PTR(-ENOMEM); - help = nfct_help(ct); - if (!help) { - if (!cda[CTA_EXPECT_TIMEOUT]) { - err = -EINVAL; - goto err_out; - } - exp->timeout.expires = - jiffies + ntohl(nla_get_be32(cda[CTA_EXPECT_TIMEOUT])) * HZ; - - exp->flags = NF_CT_EXPECT_USERSPACE; - if (cda[CTA_EXPECT_FLAGS]) { - exp->flags |= - ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); - } + if (cda[CTA_EXPECT_FLAGS]) { + exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); + exp->flags &= ~NF_CT_EXPECT_USERSPACE; } else { - if (cda[CTA_EXPECT_FLAGS]) { - exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS])); - exp->flags &= ~NF_CT_EXPECT_USERSPACE; - } else - exp->flags = 0; + exp->flags = 0; } if (cda[CTA_EXPECT_FN]) { const char *name = nla_data(cda[CTA_EXPECT_FN]); -- cgit From dedb67c4b4e5fa2e6e149a2ce93e7848aaa9d762 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 28 Mar 2017 22:27:32 +0530 Subject: netfilter: Add nfnl_msg_type() helper function Add and use nfnl_msg_type() function to replace opencoded nfnetlink message type. I suggested this change, Arushi Singhal made an initial patch to address this but was missing several spots. Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_netlink.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'net/netfilter/nf_conntrack_netlink.c') diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index cd0a6d270ebe..773d2187a5ea 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -467,7 +467,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, struct nlattr *nest_parms; unsigned int flags = portid ? NLM_F_MULTI : 0, event; - event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW); + event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_NEW); nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; @@ -652,7 +652,7 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) if (skb == NULL) goto errout; - type |= NFNL_SUBSYS_CTNETLINK << 8; + type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, type); nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; @@ -1983,7 +1983,8 @@ ctnetlink_ct_stat_cpu_fill_info(struct sk_buff *skb, u32 portid, u32 seq, struct nfgenmsg *nfmsg; unsigned int flags = portid ? NLM_F_MULTI : 0, event; - event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS_CPU); + event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, + IPCTNL_MSG_CT_GET_STATS_CPU); nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; @@ -2066,7 +2067,7 @@ ctnetlink_stat_ct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type, unsigned int flags = portid ? NLM_F_MULTI : 0, event; unsigned int nr_conntracks = atomic_read(&net->ct.count); - event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_GET_STATS); + event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS); nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; @@ -2576,7 +2577,7 @@ ctnetlink_exp_fill_info(struct sk_buff *skb, u32 portid, u32 seq, struct nfgenmsg *nfmsg; unsigned int flags = portid ? NLM_F_MULTI : 0; - event |= NFNL_SUBSYS_CTNETLINK_EXP << 8; + event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, event); nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; @@ -2627,7 +2628,7 @@ ctnetlink_expect_event(unsigned int events, struct nf_exp_event *item) if (skb == NULL) goto errout; - type |= NFNL_SUBSYS_CTNETLINK_EXP << 8; + type = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK_EXP, type); nlh = nlmsg_put(skb, item->portid, 0, type, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; @@ -3212,7 +3213,8 @@ ctnetlink_exp_stat_fill_info(struct sk_buff *skb, u32 portid, u32 seq, int cpu, struct nfgenmsg *nfmsg; unsigned int flags = portid ? NLM_F_MULTI : 0, event; - event = (NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_EXP_GET_STATS_CPU); + event = nfnl_msg_type(NFNL_SUBSYS_CTNETLINK, + IPCTNL_MSG_EXP_GET_STATS_CPU); nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags); if (nlh == NULL) goto nlmsg_failure; -- cgit From ab8bc7ed864b9c4f1fcb00a22bbe4e0f66ce8003 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Fri, 14 Apr 2017 20:31:09 +0200 Subject: netfilter: remove nf_ct_is_untracked This function is now obsolete and always returns false. This change has no effect on generated code. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_netlink.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'net/netfilter/nf_conntrack_netlink.c') diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 773d2187a5ea..83a1190504b4 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -627,10 +627,6 @@ ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item) unsigned int flags = 0, group; int err; - /* ignore our fake conntrack entry */ - if (nf_ct_is_untracked(ct)) - return 0; - if (events & (1 << IPCT_DESTROY)) { type = IPCTNL_MSG_CT_DELETE; group = NFNLGRP_CONNTRACK_DESTROY; @@ -2173,13 +2169,7 @@ ctnetlink_glue_build_size(const struct nf_conn *ct) static struct nf_conn *ctnetlink_glue_get_ct(const struct sk_buff *skb, enum ip_conntrack_info *ctinfo) { - struct nf_conn *ct; - - ct = nf_ct_get(skb, ctinfo); - if (ct && nf_ct_is_untracked(ct)) - ct = NULL; - - return ct; + return nf_ct_get(skb, ctinfo); } static int __ctnetlink_glue_build(struct sk_buff *skb, struct nf_conn *ct) -- cgit