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Message-Id: <1304432663-1575-6-git-send-email-sam@synack.fr>
Date: Tue, 3 May 2011 16:24:18 +0200
From: Samir Bellabes <sam@...ack.fr>
To: linux-security-module@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
netfilter-devel@...r.kernel.org, jamal <hadi@...erus.ca>,
Patrick McHardy <kaber@...sh.net>,
Evgeniy Polyakov <zbr@...emap.net>,
Grzegorz Nosek <root@...aldomain.pl>,
Samir Bellabes <sam@...ack.fr>
Subject: [RFC v3 05/10] snet: introduce snet_hooks
This patch adds the snet LSM's subsystem
snet_hooks provides the security hook's functions and the security_operations
structure. Currently hook functions are only related to network stack.
For each hook function, there is a generic mecanism:
0. check if the event [syscall, protocol] is registered
1. prepare informations for userspace
2. send informations to userspace (snet_netlink)
3. wait for verdict from userspace (snet_verdict)
4. apply verdict for the syscall
steps 3 and 4 are only valid for LSM hooks which are returning a value (a way to
'filter' the syscall). For hooks returning 'void', steps 3 and 4 don't exist,
but snet sends security informations to userspace (step 2) to update the global
security policy.
Signed-off-by: Samir Bellabes <sam@...ack.fr>
---
security/snet/snet_hooks.c | 722 ++++++++++++++++++++++++++++++++++++++++++++
security/snet/snet_hooks.h | 10 +
2 files changed, 732 insertions(+), 0 deletions(-)
create mode 100644 security/snet/snet_hooks.c
create mode 100644 security/snet/snet_hooks.h
diff --git a/security/snet/snet_hooks.c b/security/snet/snet_hooks.c
new file mode 100644
index 0000000..84ea5fc
--- /dev/null
+++ b/security/snet/snet_hooks.c
@@ -0,0 +1,722 @@
+/*
+ * snet_hook.c
+ *
+ * here are interesting informations which can be picked up from hooks.
+ *
+ *
+ * SOCKET_CREATE:
+ * family, type, protocol
+ * SOCKET_BIND:
+ * family, protocol, saddr, sport
+ * SOCKET_CONNECT:
+ * family, protocol, saddr, sport, daddr, dport
+ * SOCKET_LISTEN:
+ * family, protocol, saddr, sport
+ * SOCKET_ACCEPT:
+ * family, protocol, saddr, sport
+ *
+ * SOCKET_SENDMSG:
+ * SOCKET_RECVMSG:
+ * SOCKET_SOCK_RCV_SKB:
+ *
+ *
+ */
+
+#include <linux/skbuff.h>
+#include <linux/security.h>
+#include <linux/net.h>
+#include <net/sock.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <net/inet_sock.h>
+#include <linux/ipv6.h>
+#include <linux/snet.h>
+#include <linux/uio.h>
+#include "snet_hooks.h"
+#include "snet_verdict.h"
+#include "snet_netlink.h"
+#include "snet_event.h"
+#include "snet_ticket.h"
+
+static inline void snet_pr_tuple(struct snet_info *info)
+{
+ switch (info->family) {
+ case AF_INET:
+ pr_debug("%pI4:%u->%pI4:%u\n",
+ &info->src.u3.ip, info->src.u.port,
+ &info->dst.u3.ip, info->dst.u.port);
+ break;
+ case AF_INET6:
+ pr_debug("%pI6:%u->%pI6:%u\n",
+ &info->src.u3.ip6, info->src.u.port,
+ &info->dst.u3.ip6, info->dst.u.port);
+ break;
+ default:
+ break;
+ }
+ return;
+}
+
+static inline int snet_check_listeners(enum snet_verdict *verdict)
+{
+ if (snet_nl_pid == 0 || snet_nl_pid == current->pid ) {
+ if (verdict != NULL)
+ *verdict = SNET_VERDICT_GRANT;
+ return -1;
+ }
+ return 0;
+}
+
+static int snet_do_verdict(enum snet_verdict *verdict, struct snet_info *info)
+{
+ if (info->verdict_id == 0)
+ return -1;
+ /* sending networking informations to userspace */
+ if (snet_nl_send_event(info) == 0)
+ /* waiting for userspace reply or timeout */
+ *verdict = snet_verdict_wait(info->verdict_id);
+ /* removing verdict */
+ snet_verdict_remove(info->verdict_id);
+ return 0;
+}
+
+static void snet_do_send_event(struct snet_info *info)
+{
+ snet_nl_send_event(info);
+ return;
+}
+
+/*
+ * security operations helper functions
+ */
+
+/*
+ * security operations functions members
+ */
+
+static int snet_socket_create(int family, int type, int protocol, int kern)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+
+ /* if (kern) */
+ /* ; /\* do something smart *\/ */
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ if (snet_event_is_registered(SNET_SOCKET_CREATE, protocol)) {
+ struct snet_info info;
+
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_CREATE;
+ info.protocol = protocol;
+ info.family = family;
+ info.type = type;
+
+ pr_debug("family=%u type=%u protocol=%u kern=%u\n",
+ family, type, protocol, kern);
+
+ snet_do_verdict(&verdict, &info);
+
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+
+out:
+ return verdict;
+}
+
+static int snet_socket_bind(struct socket *sock,
+ struct sockaddr *address, int addrlen)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_BIND, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+ struct sockaddr_in *a = (struct sockaddr_in *) address;
+ struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) address;
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_BIND;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = a->sin_addr.s_addr;
+ info.dst.u3.ip = inet->inet_daddr;
+ info.src.u.port = ntohs(a->sin_port);
+ /* check tickets */
+ verdict = snet_ticket_check(&info) ;
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&a6->sin6_addr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ info.src.u.port = ntohs(a6->sin6_port);
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_verdict(&verdict, &info);
+ /* create ticket */
+ snet_ticket_create(&info, verdict);
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static int snet_socket_connect(struct socket *sock,
+ struct sockaddr *address, int addrlen)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_CONNECT, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+ struct sockaddr_in *a = (struct sockaddr_in *) address;
+ struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) address;
+
+ /* prepare networking informations for userspace */
+ memset(&info, 0, sizeof(struct snet_info));
+ info.syscall = SNET_SOCKET_CONNECT;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.src.u.port = ntohs(inet->inet_sport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = a->sin_addr.s_addr;
+ info.dst.u.port = ntohs(a->sin_port);
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&a6->sin6_addr,
+ sizeof(info.dst.u3.ip6));
+ info.dst.u.port = ntohs(a6->sin6_port);
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_verdict(&verdict, &info);
+ /* create ticket */
+ snet_ticket_create(&info, verdict);
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static int snet_socket_listen(struct socket *sock, int backlog)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_LISTEN, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+
+ /* prepare networking informations for userspace */
+ memset(&info, 0, sizeof(struct snet_info));
+ info.syscall = SNET_SOCKET_LISTEN;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_verdict(&verdict, &info);
+ /* create ticket */
+ snet_ticket_create(&info, verdict);
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static int snet_socket_accept(struct socket *sock, struct socket *newsock)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_ACCEPT, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_ACCEPT;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_verdict(&verdict, &info);
+ /* create ticket */
+ snet_ticket_create(&info, verdict);
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static void snet_socket_post_accept(struct socket *sock, struct socket *newsock)
+{
+ u8 protocol = 0;
+
+ if (snet_check_listeners(NULL) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_POST_ACCEPT, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(newsock->sk);
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_POST_ACCEPT;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.verdict_id = 0;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ break;
+#endif
+ default:
+ goto out;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_send_event(&info);
+ }
+out:
+ return;
+}
+
+static int snet_socket_sendmsg(struct socket *sock,
+ struct msghdr *msg, int size)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_SENDMSG, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_SENDMSG;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_verdict(&verdict, &info);
+ /* create ticket */
+ snet_ticket_create(&info, verdict);
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static int snet_socket_recvmsg(struct socket *sock,
+ struct msghdr *msg, int size, int flags)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_RECVMSG, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_RECVMSG;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ /* check tickets */
+ verdict = snet_ticket_check(&info);
+ if (verdict != SNET_VERDICT_NONE)
+ goto out;
+ /* inserting verdict PENDING */
+ info.verdict_id = snet_verdict_insert();
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_verdict(&verdict, &info);
+ /* create ticket */
+ snet_ticket_create(&info, verdict);
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static int snet_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+ enum snet_verdict verdict = SNET_VERDICT_NONE;
+ u8 protocol = 0;
+
+ if (snet_check_listeners(&verdict) < 0)
+ goto out;
+
+ protocol = sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_SOCK_RCV_SKB, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sk);
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_SOCK_RCV_SKB;
+ info.protocol = protocol;
+ info.family = sk->sk_family;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sk->sk_family) {
+ case PF_INET:
+ /* inserting verdict PENDING */
+ /* info.verdict_id = snet_verdict_insert(); */
+
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ /* inserting verdict PENDING */
+ /* info.verdict_id = snet_verdict_insert(); */
+
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ break;
+#endif
+ default:
+ verdict = SNET_VERDICT_NONE;
+ goto skip_send_wait;
+ break;
+ }
+ snet_pr_tuple(&info);
+ /* SNET_DOC_VERDICT(info); */
+ } else {
+ verdict = SNET_VERDICT_GRANT;
+ }
+
+skip_send_wait:
+ if (verdict == SNET_VERDICT_NONE)
+ verdict = snet_verdict_policy;
+out:
+ return verdict;
+}
+
+static void snet_socket_close(struct socket *sock)
+{
+ u8 protocol = 0;
+
+ if (sock == NULL || sock->sk == NULL) {
+ goto out;
+ }
+
+ if (snet_check_listeners(NULL) < 0)
+ goto out;
+
+ protocol = sock->sk->sk_protocol;
+
+ if (snet_event_is_registered(SNET_SOCKET_CLOSE, protocol)) {
+ struct snet_info info;
+ struct inet_sock *inet = inet_sk(sock->sk);
+
+ /* prepare networking informations for userspace */
+ info.syscall = SNET_SOCKET_CLOSE;
+ info.protocol = protocol;
+ info.family = sock->sk->sk_family;
+ info.verdict_id = 0;
+ info.src.u.port = ntohs(inet->inet_sport);
+ info.dst.u.port = ntohs(inet->inet_dport);
+
+ switch (sock->sk->sk_family) {
+ case PF_INET:
+ info.src.u3.ip = inet->inet_saddr;
+ info.dst.u3.ip = inet->inet_daddr;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case PF_INET6:
+ memcpy(&info.src.u3.ip6, (void *)&inet->pinet6->saddr,
+ sizeof(info.src.u3.ip6));
+ memcpy(&info.dst.u3.ip6, (void *)&inet->pinet6->daddr,
+ sizeof(info.dst.u3.ip6));
+ break;
+#endif
+ default:
+ goto out;
+ break;
+ }
+ snet_pr_tuple(&info);
+ snet_do_send_event(&info);
+ }
+out:
+ return;
+}
+
+static struct security_operations snet_security_ops = {
+ .name = "snet",
+
+ .socket_create = snet_socket_create,
+ .socket_bind = snet_socket_bind,
+ .socket_connect = snet_socket_connect,
+ .socket_listen = snet_socket_listen,
+ .socket_accept = snet_socket_accept,
+ .socket_post_accept = snet_socket_post_accept,
+ .socket_sendmsg = snet_socket_sendmsg,
+ .socket_recvmsg = snet_socket_recvmsg,
+ .socket_sock_rcv_skb = snet_socket_sock_rcv_skb,
+ .socket_close = snet_socket_close,
+
+ .cred_prepare = snet_prepare_creds,
+ .cred_free = snet_cred_free,
+};
+
+int snet_hooks_init(void)
+{
+ if (!security_module_enable(&snet_security_ops))
+ return 0;
+
+ if (register_security(&snet_security_ops))
+ panic("snet: failed to register security_ops\n");
+
+ return 0;
+}
diff --git a/security/snet/snet_hooks.h b/security/snet/snet_hooks.h
new file mode 100644
index 0000000..05fe5e8
--- /dev/null
+++ b/security/snet/snet_hooks.h
@@ -0,0 +1,10 @@
+#ifndef _SNET_HOOKS_H
+#define _SNET_HOOKS_H
+
+extern uint32_t snet_nl_pid;
+extern unsigned int snet_verdict_policy;
+
+/* init function */
+int snet_hooks_init(void);
+
+#endif /* _SNET_HOOK_H */
--
1.7.4.1
--
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