projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
| 3 | * operating system. INET is implemented using the BSD Socket | |
| 4 | * interface as the means of communication with the user level. | |
| 5 | * | |
| 6 | * Definitions for the UDP module. | |
| 7 | * | |
| 8 | * Version: @(#)udp.h 1.0.2 05/07/93 | |
| 9 | * | |
| 02c30a84 | 10 | * Authors: Ross Biro |
| 1da177e4 LT |
11 | * Fred N. van Kempen, <[email protected]> |
| 12 | * | |
| 13 | * Fixes: | |
| 14 | * Alan Cox : Turned on udp checksums. I don't want to | |
| 15 | * chase 'memory corruption' bugs that aren't! | |
| 16 | * | |
| 17 | * This program is free software; you can redistribute it and/or | |
| 18 | * modify it under the terms of the GNU General Public License | |
| 19 | * as published by the Free Software Foundation; either version | |
| 20 | * 2 of the License, or (at your option) any later version. | |
| 21 | */ | |
| 22 | #ifndef _UDP_H | |
| 23 | #define _UDP_H | |
| 24 | ||
| 1da177e4 | 25 | #include <linux/list.h> |
| 14c85021 | 26 | #include <net/inet_sock.h> |
| 1da177e4 LT |
27 | #include <net/sock.h> |
| 28 | #include <net/snmp.h> | |
| 29 | #include <linux/seq_file.h> | |
| 30 | ||
| 31 | #define UDP_HTABLE_SIZE 128 | |
| 32 | ||
| 33 | /* udp.c: This needs to be shared by v4 and v6 because the lookup | |
| 34 | * and hashing code needs to work with different AF's yet | |
| 35 | * the port space is shared. | |
| 36 | */ | |
| 37 | extern struct hlist_head udp_hash[UDP_HTABLE_SIZE]; | |
| 38 | extern rwlock_t udp_hash_lock; | |
| 39 | ||
| 40 | extern int udp_port_rover; | |
| 41 | ||
| 42 | static inline int udp_lport_inuse(u16 num) | |
| 43 | { | |
| 44 | struct sock *sk; | |
| 45 | struct hlist_node *node; | |
| 46 | ||
| 47 | sk_for_each(sk, node, &udp_hash[num & (UDP_HTABLE_SIZE - 1)]) | |
| 48 | if (inet_sk(sk)->num == num) | |
| 49 | return 1; | |
| 50 | return 0; | |
| 51 | } | |
| 52 | ||
| 53 | /* Note: this must match 'valbool' in sock_setsockopt */ | |
| 54 | #define UDP_CSUM_NOXMIT 1 | |
| 55 | ||
| 56 | /* Used by SunRPC/xprt layer. */ | |
| 57 | #define UDP_CSUM_NORCV 2 | |
| 58 | ||
| 59 | /* Default, as per the RFC, is to always do csums. */ | |
| 60 | #define UDP_CSUM_DEFAULT 0 | |
| 61 | ||
| 62 | extern struct proto udp_prot; | |
| 63 | ||
| 14c85021 | 64 | struct sk_buff; |
| 1da177e4 LT |
65 | |
| 66 | extern void udp_err(struct sk_buff *, u32); | |
| 67 | ||
| 68 | extern int udp_sendmsg(struct kiocb *iocb, struct sock *sk, | |
| 69 | struct msghdr *msg, size_t len); | |
| 70 | ||
| 71 | extern int udp_rcv(struct sk_buff *skb); | |
| 72 | extern int udp_ioctl(struct sock *sk, int cmd, unsigned long arg); | |
| 73 | extern int udp_disconnect(struct sock *sk, int flags); | |
| 74 | extern unsigned int udp_poll(struct file *file, struct socket *sock, | |
| 75 | poll_table *wait); | |
| 76 | ||
| 77 | DECLARE_SNMP_STAT(struct udp_mib, udp_statistics); | |
| 78 | #define UDP_INC_STATS(field) SNMP_INC_STATS(udp_statistics, field) | |
| 79 | #define UDP_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_statistics, field) | |
| 80 | #define UDP_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_statistics, field) | |
| 81 | ||
| 82 | /* /proc */ | |
| 83 | struct udp_seq_afinfo { | |
| 84 | struct module *owner; | |
| 85 | char *name; | |
| 86 | sa_family_t family; | |
| 87 | int (*seq_show) (struct seq_file *m, void *v); | |
| 88 | struct file_operations *seq_fops; | |
| 89 | }; | |
| 90 | ||
| 91 | struct udp_iter_state { | |
| 92 | sa_family_t family; | |
| 93 | int bucket; | |
| 94 | struct seq_operations seq_ops; | |
| 95 | }; | |
| 96 | ||
| 20380731 | 97 | #ifdef CONFIG_PROC_FS |
| 1da177e4 LT |
98 | extern int udp_proc_register(struct udp_seq_afinfo *afinfo); |
| 99 | extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo); | |
| 20380731 ACM |
100 | |
| 101 | extern int udp4_proc_init(void); | |
| 102 | extern void udp4_proc_exit(void); | |
| 103 | #endif | |
| 1da177e4 | 104 | #endif /* _UDP_H */ |