#include <net/ip.h>
#include <linux/ipv6.h>
#include <linux/seq_file.h>
+#include <linux/poll.h>
/**
* struct udp_skb_cb - UDP(-Lite) private variables
};
#define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb))
-extern struct hlist_head udp_hash[UDP_HTABLE_SIZE];
-extern rwlock_t udp_hash_lock;
+/**
+ * struct udp_hslot - UDP hash slot
+ *
+ * @head: head of list of sockets
+ * @count: number of sockets in 'head' list
+ * @lock: spinlock protecting changes to head/count
+ */
+struct udp_hslot {
+ struct hlist_nulls_head head;
+ int count;
+ spinlock_t lock;
+} __attribute__((aligned(2 * sizeof(long))));
+/**
+ * struct udp_table - UDP table
+ *
+ * @hash: hash table, sockets are hashed on (local port)
+ * @hash2: hash table, sockets are hashed on (local port, local address)
+ * @mask: number of slots in hash tables, minus 1
+ * @log: log2(number of slots in hash table)
+ */
+struct udp_table {
+ struct udp_hslot *hash;
+ struct udp_hslot *hash2;
+ unsigned int mask;
+ unsigned int log;
+};
+extern struct udp_table udp_table;
+extern void udp_table_init(struct udp_table *, const char *);
+static inline struct udp_hslot *udp_hashslot(struct udp_table *table,
+ struct net *net, unsigned num)
+{
+ return &table->hash[udp_hashfn(net, num, table->mask)];
+}
+/*
+ * For secondary hash, net_hash_mix() is performed before calling
+ * udp_hashslot2(), this explains difference with udp_hashslot()
+ */
+static inline struct udp_hslot *udp_hashslot2(struct udp_table *table,
+ unsigned int hash)
+{
+ return &table->hash2[hash & table->mask];
+}
/* Note: this must match 'valbool' in sock_setsockopt */
#define UDP_CSUM_NOXMIT 1
extern struct proto udp_prot;
+extern atomic_t udp_memory_allocated;
+
+/* sysctl variables for udp */
+extern int sysctl_udp_mem[3];
+extern int sysctl_udp_rmem_min;
+extern int sysctl_udp_wmem_min;
+
struct sk_buff;
/*
*/
static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb)
{
- if (! UDP_SKB_CB(skb)->partial_cov)
- return __skb_checksum_complete(skb);
- return csum_fold(skb_checksum(skb, 0, UDP_SKB_CB(skb)->cscov,
- skb->csum));
+ return __skb_checksum_complete_head(skb, UDP_SKB_CB(skb)->cscov);
}
-static inline __sum16 udp_lib_checksum_complete(struct sk_buff *skb)
+static inline int udp_lib_checksum_complete(struct sk_buff *skb)
{
- return skb->ip_summed != CHECKSUM_UNNECESSARY &&
+ return !skb_csum_unnecessary(skb) &&
__udp_lib_checksum_complete(skb);
}
*/
static inline __wsum udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
{
- __wsum csum = csum_partial(skb->h.raw, sizeof(struct udphdr), 0);
-
+ __wsum csum = csum_partial(skb_transport_header(skb),
+ sizeof(struct udphdr), 0);
skb_queue_walk(&sk->sk_write_queue, skb) {
csum = csum_add(csum, skb->csum);
}
BUG();
}
-static inline void udp_lib_unhash(struct sock *sk)
-{
- write_lock_bh(&udp_hash_lock);
- if (sk_del_node_init(sk)) {
- inet_sk(sk)->num = 0;
- sock_prot_dec_use(sk->sk_prot);
- }
- write_unlock_bh(&udp_hash_lock);
-}
+extern void udp_lib_unhash(struct sock *sk);
static inline void udp_lib_close(struct sock *sk, long timeout)
{
sk_common_release(sk);
}
+extern int udp_lib_get_port(struct sock *sk, unsigned short snum,
+ int (*)(const struct sock *,const struct sock *),
+ unsigned int hash2_nulladdr);
/* net/ipv4/udp.c */
extern int udp_get_port(struct sock *sk, unsigned short snum,
extern int udp_sendmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len);
+extern void udp_flush_pending_frames(struct sock *sk);
extern int udp_rcv(struct sk_buff *skb);
extern int udp_ioctl(struct sock *sk, int cmd, unsigned long arg);
extern int udp_disconnect(struct sock *sk, int flags);
extern unsigned int udp_poll(struct file *file, struct socket *sock,
poll_table *wait);
+extern int udp_lib_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+extern int udp_lib_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen,
+ int (*push_pending_frames)(struct sock *));
+
+extern struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
+ __be32 daddr, __be16 dport,
+ int dif);
-DECLARE_SNMP_STAT(struct udp_mib, udp_statistics);
/*
* SNMP statistics for UDP and UDP-Lite
*/
-#define UDP_INC_STATS_USER(field, is_udplite) do { \
- if (is_udplite) SNMP_INC_STATS_USER(udplite_statistics, field); \
- else SNMP_INC_STATS_USER(udp_statistics, field); } while(0)
-#define UDP_INC_STATS_BH(field, is_udplite) do { \
- if (is_udplite) SNMP_INC_STATS_BH(udplite_statistics, field); \
- else SNMP_INC_STATS_BH(udp_statistics, field); } while(0)
+#define UDP_INC_STATS_USER(net, field, is_udplite) do { \
+ if (is_udplite) SNMP_INC_STATS_USER((net)->mib.udplite_statistics, field); \
+ else SNMP_INC_STATS_USER((net)->mib.udp_statistics, field); } while(0)
+#define UDP_INC_STATS_BH(net, field, is_udplite) do { \
+ if (is_udplite) SNMP_INC_STATS_BH((net)->mib.udplite_statistics, field); \
+ else SNMP_INC_STATS_BH((net)->mib.udp_statistics, field); } while(0)
+
+#define UDP6_INC_STATS_BH(net, field, is_udplite) do { \
+ if (is_udplite) SNMP_INC_STATS_BH((net)->mib.udplite_stats_in6, field);\
+ else SNMP_INC_STATS_BH((net)->mib.udp_stats_in6, field); \
+} while(0)
+#define UDP6_INC_STATS_USER(net, field, __lite) do { \
+ if (__lite) SNMP_INC_STATS_USER((net)->mib.udplite_stats_in6, field); \
+ else SNMP_INC_STATS_USER((net)->mib.udp_stats_in6, field); \
+} while(0)
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#define UDPX_INC_STATS_BH(sk, field) \
+ do { \
+ if ((sk)->sk_family == AF_INET) \
+ UDP_INC_STATS_BH(sock_net(sk), field, 0); \
+ else \
+ UDP6_INC_STATS_BH(sock_net(sk), field, 0); \
+ } while (0);
+#else
+#define UDPX_INC_STATS_BH(sk, field) UDP_INC_STATS_BH(sock_net(sk), field, 0)
+#endif
/* /proc */
struct udp_seq_afinfo {
- struct module *owner;
char *name;
sa_family_t family;
- struct hlist_head *hashtable;
- int (*seq_show) (struct seq_file *m, void *v);
- struct file_operations *seq_fops;
+ struct udp_table *udp_table;
+ struct file_operations seq_fops;
+ struct seq_operations seq_ops;
};
struct udp_iter_state {
+ struct seq_net_private p;
sa_family_t family;
- struct hlist_head *hashtable;
int bucket;
- struct seq_operations seq_ops;
+ struct udp_table *udp_table;
};
#ifdef CONFIG_PROC_FS
-extern int udp_proc_register(struct udp_seq_afinfo *afinfo);
-extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo);
+extern int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo);
+extern void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo);
extern int udp4_proc_init(void);
extern void udp4_proc_exit(void);
#endif
+
+extern void udp_init(void);
+
+extern int udp4_ufo_send_check(struct sk_buff *skb);
+extern struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb, int features);
#endif /* _UDP_H */