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-rw-r--r--include/linux/in.h1
-rw-r--r--include/linux/socket.h1
-rw-r--r--include/linux/udp.h12
-rw-r--r--include/net/ipv6.h12
-rw-r--r--include/net/transp_v6.h2
-rw-r--r--include/net/udp.h91
-rw-r--r--include/net/udplite.h149
-rw-r--r--include/net/xfrm.h2
8 files changed, 263 insertions, 7 deletions
diff --git a/include/linux/in.h b/include/linux/in.h
index 2619859f6e1b..1912e7c0bc26 100644
--- a/include/linux/in.h
+++ b/include/linux/in.h
@@ -45,6 +45,7 @@ enum {
45 45
46 IPPROTO_COMP = 108, /* Compression Header protocol */ 46 IPPROTO_COMP = 108, /* Compression Header protocol */
47 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */ 47 IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
48 IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
48 49
49 IPPROTO_RAW = 255, /* Raw IP packets */ 50 IPPROTO_RAW = 255, /* Raw IP packets */
50 IPPROTO_MAX 51 IPPROTO_MAX
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 361409094649..592b66679823 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -264,6 +264,7 @@ struct ucred {
264#define SOL_IPV6 41 264#define SOL_IPV6 41
265#define SOL_ICMPV6 58 265#define SOL_ICMPV6 58
266#define SOL_SCTP 132 266#define SOL_SCTP 132
267#define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
267#define SOL_RAW 255 268#define SOL_RAW 255
268#define SOL_IPX 256 269#define SOL_IPX 256
269#define SOL_AX25 257 270#define SOL_AX25 257
diff --git a/include/linux/udp.h b/include/linux/udp.h
index 014b41d1e308..564f3b050105 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -38,6 +38,7 @@ struct udphdr {
38#include <linux/types.h> 38#include <linux/types.h>
39 39
40#include <net/inet_sock.h> 40#include <net/inet_sock.h>
41#define UDP_HTABLE_SIZE 128
41 42
42struct udp_sock { 43struct udp_sock {
43 /* inet_sock has to be the first member */ 44 /* inet_sock has to be the first member */
@@ -50,12 +51,23 @@ struct udp_sock {
50 * when the socket is uncorked. 51 * when the socket is uncorked.
51 */ 52 */
52 __u16 len; /* total length of pending frames */ 53 __u16 len; /* total length of pending frames */
54 /*
55 * Fields specific to UDP-Lite.
56 */
57 __u16 pcslen;
58 __u16 pcrlen;
59/* indicator bits used by pcflag: */
60#define UDPLITE_BIT 0x1 /* set by udplite proto init function */
61#define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */
62#define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */
63 __u8 pcflag; /* marks socket as UDP-Lite if > 0 */
53}; 64};
54 65
55static inline struct udp_sock *udp_sk(const struct sock *sk) 66static inline struct udp_sock *udp_sk(const struct sock *sk)
56{ 67{
57 return (struct udp_sock *)sk; 68 return (struct udp_sock *)sk;
58} 69}
70#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
59 71
60#endif 72#endif
61 73
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 3c266ad99a02..9390649bbfec 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -158,9 +158,13 @@ DECLARE_SNMP_STAT(struct icmpv6_mib, icmpv6_statistics);
158 SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \ 158 SNMP_INC_STATS_OFFSET_BH(icmpv6_statistics, field, _offset); \
159}) 159})
160DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6); 160DECLARE_SNMP_STAT(struct udp_mib, udp_stats_in6);
161#define UDP6_INC_STATS(field) SNMP_INC_STATS(udp_stats_in6, field) 161DECLARE_SNMP_STAT(struct udp_mib, udplite_stats_in6);
162#define UDP6_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_stats_in6, field) 162#define UDP6_INC_STATS_BH(field, is_udplite) do { \
163#define UDP6_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_stats_in6, field) 163 if (is_udplite) SNMP_INC_STATS_BH(udplite_stats_in6, field); \
164 else SNMP_INC_STATS_BH(udp_stats_in6, field); } while(0)
165#define UDP6_INC_STATS_USER(field, is_udplite) do { \
166 if (is_udplite) SNMP_INC_STATS_USER(udplite_stats_in6, field); \
167 else SNMP_INC_STATS_USER(udp_stats_in6, field); } while(0)
164 168
165int snmp6_register_dev(struct inet6_dev *idev); 169int snmp6_register_dev(struct inet6_dev *idev);
166int snmp6_unregister_dev(struct inet6_dev *idev); 170int snmp6_unregister_dev(struct inet6_dev *idev);
@@ -604,6 +608,8 @@ extern int tcp6_proc_init(void);
604extern void tcp6_proc_exit(void); 608extern void tcp6_proc_exit(void);
605extern int udp6_proc_init(void); 609extern int udp6_proc_init(void);
606extern void udp6_proc_exit(void); 610extern void udp6_proc_exit(void);
611extern int udplite6_proc_init(void);
612extern void udplite6_proc_exit(void);
607extern int ipv6_misc_proc_init(void); 613extern int ipv6_misc_proc_init(void);
608extern void ipv6_misc_proc_exit(void); 614extern void ipv6_misc_proc_exit(void);
609 615
diff --git a/include/net/transp_v6.h b/include/net/transp_v6.h
index 61f724c1036f..409da3a9a455 100644
--- a/include/net/transp_v6.h
+++ b/include/net/transp_v6.h
@@ -11,6 +11,7 @@
11 11
12extern struct proto rawv6_prot; 12extern struct proto rawv6_prot;
13extern struct proto udpv6_prot; 13extern struct proto udpv6_prot;
14extern struct proto udplitev6_prot;
14extern struct proto tcpv6_prot; 15extern struct proto tcpv6_prot;
15 16
16struct flowi; 17struct flowi;
@@ -24,6 +25,7 @@ extern void ipv6_destopt_init(void);
24/* transport protocols */ 25/* transport protocols */
25extern void rawv6_init(void); 26extern void rawv6_init(void);
26extern void udpv6_init(void); 27extern void udpv6_init(void);
28extern void udplitev6_init(void);
27extern void tcpv6_init(void); 29extern void tcpv6_init(void);
28 30
29extern int udpv6_connect(struct sock *sk, 31extern int udpv6_connect(struct sock *sk,
diff --git a/include/net/udp.h b/include/net/udp.h
index db0c05f67546..4f0626735ed3 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -26,9 +26,28 @@
26#include <net/inet_sock.h> 26#include <net/inet_sock.h>
27#include <net/sock.h> 27#include <net/sock.h>
28#include <net/snmp.h> 28#include <net/snmp.h>
29#include <net/ip.h>
30#include <linux/ipv6.h>
29#include <linux/seq_file.h> 31#include <linux/seq_file.h>
30 32
31#define UDP_HTABLE_SIZE 128 33/**
34 * struct udp_skb_cb - UDP(-Lite) private variables
35 *
36 * @header: private variables used by IPv4/IPv6
37 * @cscov: checksum coverage length (UDP-Lite only)
38 * @partial_cov: if set indicates partial csum coverage
39 */
40struct udp_skb_cb {
41 union {
42 struct inet_skb_parm h4;
43#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
44 struct inet6_skb_parm h6;
45#endif
46 } header;
47 __u16 cscov;
48 __u8 partial_cov;
49};
50#define UDP_SKB_CB(__skb) ((struct udp_skb_cb *)((__skb)->cb))
32 51
33extern struct hlist_head udp_hash[UDP_HTABLE_SIZE]; 52extern struct hlist_head udp_hash[UDP_HTABLE_SIZE];
34extern rwlock_t udp_hash_lock; 53extern rwlock_t udp_hash_lock;
@@ -47,6 +66,62 @@ extern struct proto udp_prot;
47 66
48struct sk_buff; 67struct sk_buff;
49 68
69/*
70 * Generic checksumming routines for UDP(-Lite) v4 and v6
71 */
72static inline u16 __udp_lib_checksum_complete(struct sk_buff *skb)
73{
74 if (! UDP_SKB_CB(skb)->partial_cov)
75 return __skb_checksum_complete(skb);
76 return csum_fold(skb_checksum(skb, 0, UDP_SKB_CB(skb)->cscov,
77 skb->csum));
78}
79
80static __inline__ int udp_lib_checksum_complete(struct sk_buff *skb)
81{
82 return skb->ip_summed != CHECKSUM_UNNECESSARY &&
83 __udp_lib_checksum_complete(skb);
84}
85
86/**
87 * udp_csum_outgoing - compute UDPv4/v6 checksum over fragments
88 * @sk: socket we are writing to
89 * @skb: sk_buff containing the filled-in UDP header
90 * (checksum field must be zeroed out)
91 */
92static inline u32 udp_csum_outgoing(struct sock *sk, struct sk_buff *skb)
93{
94 u32 csum = csum_partial(skb->h.raw, sizeof(struct udphdr), 0);
95
96 skb_queue_walk(&sk->sk_write_queue, skb) {
97 csum = csum_add(csum, skb->csum);
98 }
99 return csum;
100}
101
102/* hash routines shared between UDPv4/6 and UDP-Litev4/6 */
103static inline void udp_lib_hash(struct sock *sk)
104{
105 BUG();
106}
107
108static inline void udp_lib_unhash(struct sock *sk)
109{
110 write_lock_bh(&udp_hash_lock);
111 if (sk_del_node_init(sk)) {
112 inet_sk(sk)->num = 0;
113 sock_prot_dec_use(sk->sk_prot);
114 }
115 write_unlock_bh(&udp_hash_lock);
116}
117
118static inline void udp_lib_close(struct sock *sk, long timeout)
119{
120 sk_common_release(sk);
121}
122
123
124/* net/ipv4/udp.c */
50extern int udp_get_port(struct sock *sk, unsigned short snum, 125extern int udp_get_port(struct sock *sk, unsigned short snum,
51 int (*saddr_cmp)(const struct sock *, const struct sock *)); 126 int (*saddr_cmp)(const struct sock *, const struct sock *));
52extern void udp_err(struct sk_buff *, u32); 127extern void udp_err(struct sk_buff *, u32);
@@ -61,21 +136,29 @@ extern unsigned int udp_poll(struct file *file, struct socket *sock,
61 poll_table *wait); 136 poll_table *wait);
62 137
63DECLARE_SNMP_STAT(struct udp_mib, udp_statistics); 138DECLARE_SNMP_STAT(struct udp_mib, udp_statistics);
64#define UDP_INC_STATS(field) SNMP_INC_STATS(udp_statistics, field) 139/*
65#define UDP_INC_STATS_BH(field) SNMP_INC_STATS_BH(udp_statistics, field) 140 * SNMP statistics for UDP and UDP-Lite
66#define UDP_INC_STATS_USER(field) SNMP_INC_STATS_USER(udp_statistics, field) 141 */
142#define UDP_INC_STATS_USER(field, is_udplite) do { \
143 if (is_udplite) SNMP_INC_STATS_USER(udplite_statistics, field); \
144 else SNMP_INC_STATS_USER(udp_statistics, field); } while(0)
145#define UDP_INC_STATS_BH(field, is_udplite) do { \
146 if (is_udplite) SNMP_INC_STATS_BH(udplite_statistics, field); \
147 else SNMP_INC_STATS_BH(udp_statistics, field); } while(0)
67 148
68/* /proc */ 149/* /proc */
69struct udp_seq_afinfo { 150struct udp_seq_afinfo {
70 struct module *owner; 151 struct module *owner;
71 char *name; 152 char *name;
72 sa_family_t family; 153 sa_family_t family;
154 struct hlist_head *hashtable;
73 int (*seq_show) (struct seq_file *m, void *v); 155 int (*seq_show) (struct seq_file *m, void *v);
74 struct file_operations *seq_fops; 156 struct file_operations *seq_fops;
75}; 157};
76 158
77struct udp_iter_state { 159struct udp_iter_state {
78 sa_family_t family; 160 sa_family_t family;
161 struct hlist_head *hashtable;
79 int bucket; 162 int bucket;
80 struct seq_operations seq_ops; 163 struct seq_operations seq_ops;
81}; 164};
diff --git a/include/net/udplite.h b/include/net/udplite.h
new file mode 100644
index 000000000000..1473b3e49044
--- /dev/null
+++ b/include/net/udplite.h
@@ -0,0 +1,149 @@
1/*
2 * Definitions for the UDP-Lite (RFC 3828) code.
3 */
4#ifndef _UDPLITE_H
5#define _UDPLITE_H
6
7/* UDP-Lite socket options */
8#define UDPLITE_SEND_CSCOV 10 /* sender partial coverage (as sent) */
9#define UDPLITE_RECV_CSCOV 11 /* receiver partial coverage (threshold ) */
10
11extern struct proto udplite_prot;
12extern struct hlist_head udplite_hash[UDP_HTABLE_SIZE];
13
14/* UDP-Lite does not have a standardized MIB yet, so we inherit from UDP */
15DECLARE_SNMP_STAT(struct udp_mib, udplite_statistics);
16
17/*
18 * Checksum computation is all in software, hence simpler getfrag.
19 */
20static __inline__ int udplite_getfrag(void *from, char *to, int offset,
21 int len, int odd, struct sk_buff *skb)
22{
23 return memcpy_fromiovecend(to, (struct iovec *) from, offset, len);
24}
25
26/* Designate sk as UDP-Lite socket */
27static inline int udplite_sk_init(struct sock *sk)
28{
29 udp_sk(sk)->pcflag = UDPLITE_BIT;
30 return 0;
31}
32
33/*
34 * Checksumming routines
35 */
36static inline int udplite_checksum_init(struct sk_buff *skb, struct udphdr *uh)
37{
38 u16 cscov;
39
40 /* In UDPv4 a zero checksum means that the transmitter generated no
41 * checksum. UDP-Lite (like IPv6) mandates checksums, hence packets
42 * with a zero checksum field are illegal. */
43 if (uh->check == 0) {
44 LIMIT_NETDEBUG(KERN_DEBUG "UDPLITE: zeroed checksum field\n");
45 return 1;
46 }
47
48 UDP_SKB_CB(skb)->partial_cov = 0;
49 cscov = ntohs(uh->len);
50
51 if (cscov == 0) /* Indicates that full coverage is required. */
52 cscov = skb->len;
53 else if (cscov < 8 || cscov > skb->len) {
54 /*
55 * Coverage length violates RFC 3828: log and discard silently.
56 */
57 LIMIT_NETDEBUG(KERN_DEBUG "UDPLITE: bad csum coverage %d/%d\n",
58 cscov, skb->len);
59 return 1;
60
61 } else if (cscov < skb->len)
62 UDP_SKB_CB(skb)->partial_cov = 1;
63
64 UDP_SKB_CB(skb)->cscov = cscov;
65
66 /*
67 * There is no known NIC manufacturer supporting UDP-Lite yet,
68 * hence ip_summed is always (re-)set to CHECKSUM_NONE.
69 */
70 skb->ip_summed = CHECKSUM_NONE;
71
72 return 0;
73}
74
75static __inline__ int udplite4_csum_init(struct sk_buff *skb, struct udphdr *uh)
76{
77 int rc = udplite_checksum_init(skb, uh);
78
79 if (!rc)
80 skb->csum = csum_tcpudp_nofold(skb->nh.iph->saddr,
81 skb->nh.iph->daddr,
82 skb->len, IPPROTO_UDPLITE, 0);
83 return rc;
84}
85
86static __inline__ int udplite6_csum_init(struct sk_buff *skb, struct udphdr *uh)
87{
88 int rc = udplite_checksum_init(skb, uh);
89
90 if (!rc)
91 skb->csum = ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
92 &skb->nh.ipv6h->daddr,
93 skb->len, IPPROTO_UDPLITE, 0);
94 return rc;
95}
96
97static inline int udplite_sender_cscov(struct udp_sock *up, struct udphdr *uh)
98{
99 int cscov = up->len;
100
101 /*
102 * Sender has set `partial coverage' option on UDP-Lite socket
103 */
104 if (up->pcflag & UDPLITE_SEND_CC) {
105 if (up->pcslen < up->len) {
106 /* up->pcslen == 0 means that full coverage is required,
107 * partial coverage only if 0 < up->pcslen < up->len */
108 if (0 < up->pcslen) {
109 cscov = up->pcslen;
110 }
111 uh->len = htons(up->pcslen);
112 }
113 /*
114 * NOTE: Causes for the error case `up->pcslen > up->len':
115 * (i) Application error (will not be penalized).
116 * (ii) Payload too big for send buffer: data is split
117 * into several packets, each with its own header.
118 * In this case (e.g. last segment), coverage may
119 * exceed packet length.
120 * Since packets with coverage length > packet length are
121 * illegal, we fall back to the defaults here.
122 */
123 }
124 return cscov;
125}
126
127static inline u32 udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
128{
129 u32 csum = 0;
130 int off, len, cscov = udplite_sender_cscov(udp_sk(sk), skb->h.uh);
131
132 skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */
133
134 skb_queue_walk(&sk->sk_write_queue, skb) {
135 off = skb->h.raw - skb->data;
136 len = skb->len - off;
137
138 csum = skb_checksum(skb, off, (cscov > len)? len : cscov, csum);
139
140 if ((cscov -= len) <= 0)
141 break;
142 }
143 return csum;
144}
145
146extern void udplite4_register(void);
147extern int udplite_get_port(struct sock *sk, unsigned short snum,
148 int (*scmp)(const struct sock *, const struct sock *));
149#endif /* _UDPLITE_H */
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 81c91e8a328f..3878a88ff618 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -468,6 +468,7 @@ __be16 xfrm_flowi_sport(struct flowi *fl)
468 switch(fl->proto) { 468 switch(fl->proto) {
469 case IPPROTO_TCP: 469 case IPPROTO_TCP:
470 case IPPROTO_UDP: 470 case IPPROTO_UDP:
471 case IPPROTO_UDPLITE:
471 case IPPROTO_SCTP: 472 case IPPROTO_SCTP:
472 port = fl->fl_ip_sport; 473 port = fl->fl_ip_sport;
473 break; 474 break;
@@ -493,6 +494,7 @@ __be16 xfrm_flowi_dport(struct flowi *fl)
493 switch(fl->proto) { 494 switch(fl->proto) {
494 case IPPROTO_TCP: 495 case IPPROTO_TCP:
495 case IPPROTO_UDP: 496 case IPPROTO_UDP:
497 case IPPROTO_UDPLITE:
496 case IPPROTO_SCTP: 498 case IPPROTO_SCTP:
497 port = fl->fl_ip_dport; 499 port = fl->fl_ip_dport;
498 break; 500 break;
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-17 16:12:05 -0500