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Diffstat (limited to 'include/net/udp.h')
| -rw-r--r-- | include/net/udp.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/include/net/udp.h b/include/net/udp.h new file mode 100644 index 000000000000..c496d10101db --- /dev/null +++ b/include/net/udp.h @@ -0,0 +1,99 @@ +/* + * 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 <linux/ip.h> +#include <linux/list.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; + + +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; +}; + +extern int udp_proc_register(struct udp_seq_afinfo *afinfo); +extern void udp_proc_unregister(struct udp_seq_afinfo *afinfo); +#endif /* _UDP_H */ |