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phoenix |
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the UDP module.
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*
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* Version: @(#)udp.h 1.0.2 05/07/93
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*
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* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* Fixes:
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* Alan Cox : Turned on udp checksums. I don't want to
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* chase 'memory corruption' bugs that aren't!
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _UDP_H
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#define _UDP_H
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#include <linux/udp.h>
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#include <net/sock.h>
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#define UDP_HTABLE_SIZE 128
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/* udp.c: This needs to be shared by v4 and v6 because the lookup
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* and hashing code needs to work with different AF's yet
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* the port space is shared.
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*/
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extern struct sock *udp_hash[UDP_HTABLE_SIZE];
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extern rwlock_t udp_hash_lock;
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extern int udp_port_rover;
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static inline int udp_lport_inuse(u16 num)
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{
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struct sock *sk = udp_hash[num & (UDP_HTABLE_SIZE - 1)];
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for(; sk != NULL; sk = sk->next) {
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if(sk->num == num)
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return 1;
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}
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return 0;
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}
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/* Note: this must match 'valbool' in sock_setsockopt */
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#define UDP_CSUM_NOXMIT 1
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/* Used by SunRPC/xprt layer. */
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#define UDP_CSUM_NORCV 2
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/* Default, as per the RFC, is to always do csums. */
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#define UDP_CSUM_DEFAULT 0
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extern struct proto udp_prot;
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extern void udp_err(struct sk_buff *, u32);
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extern int udp_connect(struct sock *sk,
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struct sockaddr *usin, int addr_len);
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extern int udp_sendmsg(struct sock *sk, struct msghdr *msg, int len);
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extern int udp_rcv(struct sk_buff *skb);
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extern int udp_ioctl(struct sock *sk, int cmd, unsigned long arg);
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extern int udp_disconnect(struct sock *sk, int flags);
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extern struct udp_mib udp_statistics[NR_CPUS*2];
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#define UDP_INC_STATS(field) SNMP_INC_STATS(udp_statistics, field)
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#define UDP_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_statistics, field)
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#define UDP_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_statistics, field)
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#endif /* _UDP_H */
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