cregit-Linux how code gets into the kernel

Release 4.12 include/net/udp.h

Directory: include/net
 * 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 <linux/bug.h>
#include <net/inet_sock.h>
#include <net/sock.h>
#include <net/snmp.h>
#include <net/ip.h>
#include <linux/ipv6.h>
#include <linux/seq_file.h>
#include <linux/poll.h>

 *      struct udp_skb_cb  -  UDP(-Lite) private variables
 *      @header:      private variables used by IPv4/IPv6
 *      @cscov:       checksum coverage length (UDP-Lite only)
 *      @partial_cov: if set indicates partial csum coverage

struct udp_skb_cb {
	union {
struct inet_skb_parm	h4;
struct inet6_skb_parm	h6;
} header;
__u16		cscov;
__u8		partial_cov;

#define UDP_SKB_CB(__skb)	((struct udp_skb_cb *)((__skb)->cb))

 *      struct udp_hslot - UDP hash slot
 *      @head:  head of list of sockets
 *      @count: number of sockets in 'head' list
 *      @lock:  spinlock protecting changes to head/count

struct udp_hslot {
struct hlist_head	head;
int			count;
spinlock_t		lock;
} __attribute__((aligned(2 * sizeof(long))));

 *      struct udp_table - UDP table
 *      @hash:  hash table, sockets are hashed on (local port)
 *      @hash2: hash table, sockets are hashed on (local port, local address)
 *      @mask:  number of slots in hash tables, minus 1
 *      @log:   log2(number of slots in hash table)

struct udp_table {
struct udp_hslot	*hash;
struct udp_hslot	*hash2;
unsigned int		mask;
unsigned int		log;
extern struct udp_table udp_table;
void udp_table_init(struct udp_table *, const char *);

static inline struct udp_hslot *udp_hashslot(struct udp_table *table, struct net *net, unsigned int num) { return &table->hash[udp_hashfn(net, num, table->mask)]; }


Eric Dumazet41100.00%2100.00%

/* * For secondary hash, net_hash_mix() is performed before calling * udp_hashslot2(), this explains difference with udp_hashslot() */
static inline struct udp_hslot *udp_hashslot2(struct udp_table *table, unsigned int hash) { return &table->hash2[hash & table->mask]; }


Eric Dumazet31100.00%1100.00%

extern struct proto udp_prot; extern atomic_long_t udp_memory_allocated; /* sysctl variables for udp */ extern long sysctl_udp_mem[3]; extern int sysctl_udp_rmem_min; extern int sysctl_udp_wmem_min; struct sk_buff; /* * Generic checksumming routines for UDP(-Lite) v4 and v6 */
static inline __sum16 __udp_lib_checksum_complete(struct sk_buff *skb) { return (UDP_SKB_CB(skb)->cscov == skb->len ? __skb_checksum_complete(skb) : __skb_checksum_complete_head(skb, UDP_SKB_CB(skb)->cscov)); }


Gerrit Renker2353.49%125.00%
Tom Herbert1841.86%125.00%
Al Viro12.33%125.00%
Herbert Xu12.33%125.00%

static inline int udp_lib_checksum_complete(struct sk_buff *skb) { return !skb_csum_unnecessary(skb) && __udp_lib_checksum_complete(skb); }


Gerrit Renker1875.00%125.00%
Herbert Xu416.67%125.00%
Al Viro28.33%250.00%

/** * udp_csum_outgoing - compute UDPv4/v6 checksum over fragments * @sk: socket we are writing to * @skb: sk_buff containing the filled-in UDP header * (checksum field must be zeroed out) */
static inline __wsum udp_csum_outgoing(struct sock *sk, struct sk_buff *skb) { __wsum csum = csum_partial(skb_transport_header(skb), sizeof(struct udphdr), 0); skb_queue_walk(&sk->sk_write_queue, skb) { csum = csum_add(csum, skb->csum); } return csum; }


Gerrit Renker5391.38%133.33%
Arnaldo Carvalho de Melo35.17%133.33%
Al Viro23.45%133.33%

static inline __wsum udp_csum(struct sk_buff *skb) { __wsum csum = csum_partial(skb_transport_header(skb), sizeof(struct udphdr), skb->csum); for (skb = skb_shinfo(skb)->frag_list; skb; skb = skb->next) { csum = csum_add(csum, skb->csum); } return csum; }


Herbert Xu68100.00%1100.00%

static inline __sum16 udp_v4_check(int len, __be32 saddr, __be32 daddr, __wsum base) { return csum_tcpudp_magic(saddr, daddr, len, IPPROTO_UDP, base); }


Tom Herbert33100.00%1100.00%

void udp_set_csum(bool nocheck, struct sk_buff *skb, __be32 saddr, __be32 daddr, int len);
static inline void udp_csum_pull_header(struct sk_buff *skb) { if (!skb->csum_valid && skb->ip_summed == CHECKSUM_NONE) skb->csum = csum_partial(skb->data, sizeof(struct udphdr), skb->csum); skb_pull_rcsum(skb, sizeof(struct udphdr)); UDP_SKB_CB(skb)->cscov -= sizeof(struct udphdr); }


Eric Dumazet710.00%150.00%

typedef struct sock *(*udp_lookup_t)(struct sk_buff *skb, __be16 sport, __be16 dport); struct sk_buff **udp_gro_receive(struct sk_buff **head, struct sk_buff *skb, struct udphdr *uh, udp_lookup_t lookup); int udp_gro_complete(struct sk_buff *skb, int nhoff, udp_lookup_t lookup);
static inline struct udphdr *udp_gro_udphdr(struct sk_buff *skb) { struct udphdr *uh; unsigned int hlen, off; off = skb_gro_offset(skb); hlen = off + sizeof(*uh); uh = skb_gro_header_fast(skb, off); if (skb_gro_header_hard(skb, hlen)) uh = skb_gro_header_slow(skb, hlen, off); return uh; }


Tom Herbert74100.00%1100.00%

/* hash routines shared between UDPv4/6 and UDP-Litev4/6 */
static inline int udp_lib_hash(struct sock *sk) { BUG(); return 0; }


Gerrit Renker1477.78%150.00%
Craig Gallek422.22%150.00%

void udp_lib_unhash(struct sock *sk); void udp_lib_rehash(struct sock *sk, u16 new_hash);
static inline void udp_lib_close(struct sock *sk, long timeout) { sk_common_release(sk); }


Gerrit Renker20100.00%1100.00%

int udp_lib_get_port(struct sock *sk, unsigned short snum, unsigned int hash2_nulladdr); u32 udp_flow_hashrnd(void);
static inline __be16 udp_flow_src_port(struct net *net, struct sk_buff *skb, int min, int max, bool use_eth) { u32 hash; if (min >= max) { /* Use default range */ inet_get_local_port_range(net, &min, &max); } hash = skb_get_hash(skb); if (unlikely(!hash)) { if (use_eth) { /* Can't find a normal hash, caller has indicated an * Ethernet packet so use that to compute a hash. */ hash = jhash(skb->data, 2 * ETH_ALEN, (__force u32) skb->protocol); } else { /* Can't derive any sort of hash for the packet, set * to some consistent random value. */ hash = udp_flow_hashrnd(); } } /* Since this is being sent on the wire obfuscate hash a bit * to minimize possbility that any useful information to an * attacker is leaked. Only upper 16 bits are relevant in the * computation for 16 bit port value. */ hash ^= hash << 16; return htons((((u64) hash * (max - min)) >> 32) + min); }


Tom Herbert133100.00%2100.00%

/* net/ipv4/udp.c */ void udp_destruct_sock(struct sock *sk); void skb_consume_udp(struct sock *sk, struct sk_buff *skb, int len); int __udp_enqueue_schedule_skb(struct sock *sk, struct sk_buff *skb); void udp_skb_destructor(struct sock *sk, struct sk_buff *skb);
static inline struct sk_buff * __skb_recv_udp(struct sock *sk, unsigned int flags, int noblock, int *peeked, int *off, int *err) { return __skb_recv_datagram(sk, flags | (noblock ? MSG_DONTWAIT : 0), udp_skb_destructor, peeked, off, err); }


Paolo Abeni57100.00%1100.00%

static inline struct sk_buff *skb_recv_udp(struct sock *sk, unsigned int flags, int noblock, int *err) { int peeked, off = 0; return __skb_recv_udp(sk, flags, noblock, &peeked, &off, err); }


Paolo Abeni50100.00%1100.00%

void udp_v4_early_demux(struct sk_buff *skb); int udp_get_port(struct sock *sk, unsigned short snum, int (*saddr_cmp)(const struct sock *, const struct sock *)); void udp_err(struct sk_buff *, u32); int udp_abort(struct sock *sk, int err); int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len); int udp_push_pending_frames(struct sock *sk); void udp_flush_pending_frames(struct sock *sk); void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst); int udp_rcv(struct sk_buff *skb); int udp_ioctl(struct sock *sk, int cmd, unsigned long arg); int udp_init_sock(struct sock *sk); int __udp_disconnect(struct sock *sk, int flags); int udp_disconnect(struct sock *sk, int flags); unsigned int udp_poll(struct file *file, struct socket *sock, poll_table *wait); struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb, netdev_features_t features, bool is_ipv6); int udp_lib_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen); int udp_lib_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen, int (*push_pending_frames)(struct sock *)); struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport, __be32 daddr, __be16 dport, int dif); struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport, __be32 daddr, __be16 dport, int dif, struct udp_table *tbl, struct sk_buff *skb); struct sock *udp4_lib_lookup_skb(struct sk_buff *skb, __be16 sport, __be16 dport); struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, __be16 dport, int dif); struct sock *__udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, __be16 dport, int dif, struct udp_table *tbl, struct sk_buff *skb); struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, __be16 sport, __be16 dport); /* * SNMP statistics for UDP and UDP-Lite */ #define UDP_INC_STATS(net, field, is_udplite) do { \ if (is_udplite) SNMP_INC_STATS((net)->mib.udplite_statistics, field); \ else SNMP_INC_STATS((net)->mib.udp_statistics, field); } while(0) #define __UDP_INC_STATS(net, field, is_udplite) do { \ if (is_udplite) __SNMP_INC_STATS((net)->mib.udplite_statistics, field); \ else __SNMP_INC_STATS((net)->mib.udp_statistics, field); } while(0) #define __UDP6_INC_STATS(net, field, is_udplite) do { \ if (is_udplite) __SNMP_INC_STATS((net)->mib.udplite_stats_in6, field);\ else __SNMP_INC_STATS((net)->mib.udp_stats_in6, field); \ } while(0) #define UDP6_INC_STATS(net, field, __lite) do { \ if (__lite) SNMP_INC_STATS((net)->mib.udplite_stats_in6, field); \ else SNMP_INC_STATS((net)->mib.udp_stats_in6, field); \ } while(0) #if IS_ENABLED(CONFIG_IPV6) #define __UDPX_INC_STATS(sk, field) \ do { \ if ((sk)->sk_family == AF_INET) \ __UDP_INC_STATS(sock_net(sk), field, 0); \ else \ __UDP6_INC_STATS(sock_net(sk), field, 0); \ } while (0) #else #define __UDPX_INC_STATS(sk, field) __UDP_INC_STATS(sock_net(sk), field, 0) #endif /* /proc */ int udp_seq_open(struct inode *inode, struct file *file); struct udp_seq_afinfo { char *name; sa_family_t family; struct udp_table *udp_table; const struct file_operations *seq_fops; struct seq_operations seq_ops; }; struct udp_iter_state { struct seq_net_private p; sa_family_t family; int bucket; struct udp_table *udp_table; }; #ifdef CONFIG_PROC_FS int udp_proc_register(struct net *net, struct udp_seq_afinfo *afinfo); void udp_proc_unregister(struct net *net, struct udp_seq_afinfo *afinfo); int udp4_proc_init(void); void udp4_proc_exit(void); #endif int udpv4_offload_init(void); void udp_init(void); void udp_encap_enable(void); #if IS_ENABLED(CONFIG_IPV6) void udpv6_encap_enable(void); #endif #endif /* _UDP_H */

Overall Contributors

Tom Herbert38422.20%88.89%
Gerrit Renker25414.68%33.33%
Eric Dumazet20011.56%1617.78%
Paolo Abeni1709.83%33.33%
Herbert Xu1106.36%44.44%
Linus Torvalds (pre-git)955.49%910.00%
Pavel Emelyanov905.20%66.67%
Hideaki Yoshifuji / 吉藤英明462.66%11.11%
David S. Miller331.91%55.56%
Balazs Scheidler321.85%11.11%
Arnaldo Carvalho de Melo271.56%44.44%
KOVACS Krisztian261.50%11.11%
Stephen Hemminger201.16%22.22%
Daniel Borkmann191.10%11.11%
Hideo Aoki181.04%11.11%
Arjan van de Ven160.92%11.11%
Denis V. Lunev160.92%44.44%
Thomas Graf150.87%11.11%
Craig Gallek140.81%22.22%
Benjamin LaHaise140.81%11.11%
Daniel Lezcano120.69%22.22%
David Ahern120.69%11.11%
Shawn Bohrer90.52%11.11%
Hannes Frederic Sowa90.52%11.11%
Al Viro80.46%44.44%
Sridhar Samudrala70.40%11.11%
Richard Kennedy30.17%11.11%
Paul Gortmaker30.17%11.11%
Ravikiran G. Thirumalai30.17%11.11%
Linus Torvalds10.06%11.11%
Jesper Juhl10.06%11.11%
Directory: include/net
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.