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Diffstat (limited to 'net/core/sock.c')
-rw-r--r--net/core/sock.c151
1 files changed, 75 insertions, 76 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index 725474887..6da5f5a0d 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -76,6 +76,8 @@
* Steve Whitehouse: Added various other default routines
* common to several socket families.
* Chris Evans : Call suser() check last on F_SETOWN
+ * Jay Schulist : Added SO_ATTACH_FILTER and SO_DETACH_FILTER.
+ * Andi Kleen : Add sock_kmalloc()/sock_kfree_s()
*
* To Fix:
*
@@ -122,6 +124,10 @@
#include <net/icmp.h>
#include <linux/ipsec.h>
+#ifdef CONFIG_FILTER
+#include <linux/filter.h>
+#endif
+
#define min(a,b) ((a)<(b)?(a):(b))
/* Run time adjustable parameters. */
@@ -147,6 +153,10 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
struct linger ling;
struct ifreq req;
int ret = 0;
+
+#ifdef CONFIG_FILTER
+ struct sock_fprog fprog;
+#endif
/*
* Options without arguments
@@ -278,48 +288,6 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
break;
-#ifdef CONFIG_NET_SECURITY
- /*
- * FIXME: make these error things that are not
- * available!
- */
-
- case SO_SECURITY_AUTHENTICATION:
- if(val<=IPSEC_LEVEL_DEFAULT)
- {
- sk->authentication=val;
- return 0;
- }
- if(net_families[sock->ops->family]->authentication)
- sk->authentication=val;
- else
- return -EINVAL;
- break;
-
- case SO_SECURITY_ENCRYPTION_TRANSPORT:
- if(val<=IPSEC_LEVEL_DEFAULT)
- {
- sk->encryption=val;
- return 0;
- }
- if(net_families[sock->ops->family]->encryption)
- sk->encryption = val;
- else
- return -EINVAL;
- break;
-
- case SO_SECURITY_ENCRYPTION_NETWORK:
- if(val<=IPSEC_LEVEL_DEFAULT)
- {
- sk->encrypt_net=val;
- return 0;
- }
- if(net_families[sock->ops->family]->encrypt_net)
- sk->encrypt_net = val;
- else
- return -EINVAL;
- break;
-#endif
case SO_BINDTODEVICE:
/* Bind this socket to a particular device like "eth0",
* as specified in an ifreq structure. If the device
@@ -330,36 +298,51 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
sk->bound_dev_if = 0;
}
else {
- if (copy_from_user(&req, optval, sizeof(req)) < 0)
+ if (copy_from_user(&req, optval, sizeof(req)))
return -EFAULT;
/* Remove any cached route for this socket. */
- if (sk->dst_cache) {
- ip_rt_put((struct rtable*)sk->dst_cache);
- sk->dst_cache = NULL;
- }
+ dst_release(xchg(&sk->dst_cache, NULL));
if (req.ifr_ifrn.ifrn_name[0] == '\0') {
sk->bound_dev_if = 0;
- }
- else {
+ } else {
struct device *dev = dev_get(req.ifr_ifrn.ifrn_name);
if (!dev)
return -EINVAL;
sk->bound_dev_if = dev->ifindex;
- if (sk->daddr) {
- int ret;
- ret = ip_route_output((struct rtable**)&sk->dst_cache,
- sk->daddr, sk->saddr,
- sk->ip_tos, sk->bound_dev_if);
- if (ret)
- return ret;
- }
}
}
return 0;
+#ifdef CONFIG_FILTER
+ case SO_ATTACH_FILTER:
+ if(optlen < sizeof(struct sock_fprog))
+ return -EINVAL;
+
+ if(copy_from_user(&fprog, optval, sizeof(fprog)))
+ {
+ ret = -EFAULT;
+ break;
+ }
+
+ ret = sk_attach_filter(&fprog, sk);
+ break;
+
+ case SO_DETACH_FILTER:
+ if(sk->filter)
+ {
+ fprog.filter = sk->filter_data;
+ kfree_s(fprog.filter, (sizeof(fprog.filter) * sk->filter));
+ sk->filter_data = NULL;
+ sk->filter = 0;
+ return 0;
+ }
+ else
+ return -EINVAL;
+ break;
+#endif
/* We implement the SO_SNDLOWAT etc to
not be settable (1003.1g 5.3) */
default:
@@ -470,20 +453,6 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
return -EFAULT;
goto lenout;
-#ifdef CONFIG_NET_SECURITY
-
- case SO_SECURITY_AUTHENTICATION:
- v.val = sk->authentication;
- break;
-
- case SO_SECURITY_ENCRYPTION_TRANSPORT:
- v.val = sk->encryption;
- break;
-
- case SO_SECURITY_ENCRYPTION_NETWORK:
- v.val = sk->encrypt_net;
- break;
-#endif
default:
return(-ENOPROTOOPT);
}
@@ -589,6 +558,36 @@ struct sk_buff *sock_rmalloc(struct sock *sk, unsigned long size, int force, int
return NULL;
}
+void *sock_kmalloc(struct sock *sk, int size, int priority)
+{
+ void *mem = NULL;
+ /* Always use wmem.. */
+ if (atomic_read(&sk->wmem_alloc)+size < sk->sndbuf) {
+ /* First do the add, to avoid the race if kmalloc
+ * might sleep.
+ */
+ atomic_add(size, &sk->wmem_alloc);
+ mem = kmalloc(size, priority);
+ if (mem)
+ return mem;
+ atomic_sub(size, &sk->wmem_alloc);
+ }
+ return mem;
+}
+
+void sock_kfree_s(struct sock *sk, void *mem, int size)
+{
+#if 1 /* Debug */
+ if (atomic_read(&sk->wmem_alloc) < size) {
+ printk(KERN_DEBUG "sock_kfree_s: mem not accounted.\n");
+ return;
+ }
+#endif
+ kfree_s(mem, size);
+ atomic_sub(size, &sk->wmem_alloc);
+ sk->write_space(sk);
+}
+
/* FIXME: this is insane. We are trying suppose to be controlling how
* how much space we have for data bytes, not packet headers.
@@ -627,7 +626,7 @@ unsigned long sock_wspace(struct sock *sk)
if (sk != NULL) {
if (sk->shutdown & SEND_SHUTDOWN)
return(0);
- if (atomic_read(&sk->wmem_alloc) >= sk->sndbuf)
+ if (atomic_read(&sk->wmem_alloc) >= sk->sndbuf)
return(0);
return sk->sndbuf - atomic_read(&sk->wmem_alloc);
}
@@ -827,7 +826,7 @@ void sklist_destroy_socket(struct sock **list,struct sock *sk)
while((skb=skb_dequeue(&sk->receive_queue))!=NULL)
{
- kfree_skb(skb,FREE_READ);
+ kfree_skb(skb);
}
if(atomic_read(&sk->wmem_alloc) == 0 &&
@@ -895,7 +894,7 @@ int sock_no_getname(struct socket *sock, struct sockaddr *saddr,
return -EOPNOTSUPP;
}
-unsigned int sock_no_poll(struct socket *sock, poll_table *pt)
+unsigned int sock_no_poll(struct file * file, struct socket *sock, poll_table *pt)
{
return -EOPNOTSUPP;
}
@@ -1009,8 +1008,8 @@ void sock_init_data(struct socket *sock, struct sock *sk)
init_timer(&sk->timer);
sk->allocation = GFP_KERNEL;
- sk->rcvbuf = sysctl_rmem_default*2;
- sk->sndbuf = sysctl_wmem_default*2;
+ sk->rcvbuf = sysctl_rmem_default;
+ sk->sndbuf = sysctl_wmem_default;
sk->state = TCP_CLOSE;
sk->zapped = 1;
sk->socket = sock;
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 08:40:17 +0000