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/* * 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, <bir7@leland.Stanford.Edu> * 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/udp.h> #include <net/sock.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 sock *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 = udp_hash[num & (UDP_HTABLE_SIZE - 1)]; for(; sk != NULL; sk = sk->next) { if(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; extern void udp_err(struct sk_buff *, unsigned char *, int); extern int udp_connect(struct sock *sk, struct sockaddr *usin, int addr_len); extern int udp_sendmsg(struct sock *sk, struct msghdr *msg, int len); extern int udp_rcv(struct sk_buff *skb, unsigned short len); extern int udp_ioctl(struct sock *sk, int cmd, unsigned long arg); extern int udp_disconnect(struct sock *sk, int flags); #endif /* _UDP_H */ |