#ifndef _UDP_H
#define _UDP_H
-#include <linux/udp.h>
-#include <linux/ip.h>
#include <linux/list.h>
+#include <net/inet_sock.h>
#include <net/sock.h>
#include <net/snmp.h>
+#include <net/ip.h>
+#include <linux/ipv6.h>
#include <linux/seq_file.h>
+#include <linux/poll.h>
-#define UDP_HTABLE_SIZE 128
-
-/* udp.c: This needs to be shared by v4 and v6 because the lookup
- * and hashing code needs to work with different AF's yet
- * the port space is shared.
+/**
+ * struct udp_skb_cb - UDP(-Lite) private variables
+ *
+ * @header: private variables used by IPv4/IPv6
+ * @cscov: checksum coverage length (UDP-Lite only)
+ * @partial_cov: if set indicates partial csum coverage
*/
-extern struct hlist_head udp_hash[UDP_HTABLE_SIZE];
-extern rwlock_t udp_hash_lock;
-
-extern int udp_port_rover;
-
-static inline int udp_lport_inuse(u16 num)
-{
- struct sock *sk;
- struct hlist_node *node;
+struct udp_skb_cb {
+ union {
+ struct inet_skb_parm h4;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+ struct inet6_skb_parm h6;
+#endif
+ } header;
+ __u16 cscov;
+ __u8 partial_cov;
+};
+#define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb))
+
+struct udp_hslot {
+ struct hlist_nulls_head head;
+ spinlock_t lock;
+} __attribute__((aligned(2 * sizeof(long))));
+struct udp_table {
+ struct udp_hslot hash[UDP_HTABLE_SIZE];
+};
+extern struct udp_table udp_table;
+extern void udp_table_init(struct udp_table *);
- sk_for_each(sk, node, &udp_hash[num & (UDP_HTABLE_SIZE - 1)])
- if (inet_sk(sk)->num == num)
- return 1;
- return 0;
-}
/* 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;
+/*
+ * Generic checksumming routines for UDP(-Lite) v4 and v6
+ */
+static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb)
+{
+ return __skb_checksum_complete_head(skb, UDP_SKB_CB(skb)->cscov);
+}
+
+static inline int udp_lib_checksum_complete(struct sk_buff *skb)
+{
+ return !skb_csum_unnecessary(skb) &&
+ __udp_lib_checksum_complete(skb);
+}
+
+/**
+ * udp_csum_outgoing - compute UDPv4/v6 checksum over fragments
+ * @sk: socket we are writing to
+ * @skb: sk_buff containing the filled-in UDP header
+ * (checksum field must be zeroed out)
+ */
+static inline __wsum udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
+{
+ __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);
+ }
+ return csum;
+}
+
+/* hash routines shared between UDPv4/6 and UDP-Litev4/6 */
+static inline void udp_lib_hash(struct sock *sk)
+{
+ BUG();
+}
+
+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 ipv4_rcv_saddr_equal(const struct sock *sk1,
+ const struct sock *sk2);
+extern int udp_lib_get_port(struct sock *sk, unsigned short snum,
+ int (*)(const struct sock*,const struct sock*));
+
+/* net/ipv4/udp.c */
+extern int udp_get_port(struct sock *sk, unsigned short snum,
+ int (*saddr_cmp)(const struct sock *, const struct sock *));
extern void udp_err(struct sk_buff *, u32);
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, 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);
-#define UDP_INC_STATS(field) SNMP_INC_STATS(udp_statistics, field)
-#define UDP_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_statistics, field)
-#define UDP_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_statistics, field)
+/*
+ * SNMP statistics for UDP and UDP-Lite
+ */
+#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;
- 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;
int bucket;
- struct seq_operations seq_ops;
+ struct udp_table *udp_table;
};
-extern int udp_proc_register(struct udp_seq_afinfo *afinfo);
-extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo);
+#ifdef CONFIG_PROC_FS
+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);
#endif /* _UDP_H */
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