| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * Definitions for the UDP module. |
| * |
| * Version: @(#)udp.h 1.0.2 05/07/93 |
| * |
| * Authors: Ross Biro |
| * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| * |
| * Fixes: |
| * Alan Cox : Turned on udp checksums. I don't want to |
| * chase 'memory corruption' bugs that aren't! |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _UDP_H |
| #define _UDP_H |
| |
| #include <linux/list.h> |
| #include <net/inet_sock.h> |
| #include <net/sock.h> |
| #include <net/snmp.h> |
| #include <linux/seq_file.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. |
| */ |
| 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; |
| |
| 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 |
| |
| /* Used by SunRPC/xprt layer. */ |
| #define UDP_CSUM_NORCV 2 |
| |
| /* Default, as per the RFC, is to always do csums. */ |
| #define UDP_CSUM_DEFAULT 0 |
| |
| extern struct proto udp_prot; |
| |
| struct sk_buff; |
| |
| 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 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); |
| |
| 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) |
| |
| /* /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_iter_state { |
| sa_family_t family; |
| int bucket; |
| struct seq_operations seq_ops; |
| }; |
| |
| #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 udp4_proc_init(void); |
| extern void udp4_proc_exit(void); |
| #endif |
| #endif /* _UDP_H */ |