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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/net/udplite.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/net/udplite.h')
-rw-r--r--ANDROID_3.4.5/include/net/udplite.h132
1 files changed, 0 insertions, 132 deletions
diff --git a/ANDROID_3.4.5/include/net/udplite.h b/ANDROID_3.4.5/include/net/udplite.h
deleted file mode 100644
index 71375459..00000000
--- a/ANDROID_3.4.5/include/net/udplite.h
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Definitions for the UDP-Lite (RFC 3828) code.
- */
-#ifndef _UDPLITE_H
-#define _UDPLITE_H
-
-#include <net/ip6_checksum.h>
-
-/* UDP-Lite socket options */
-#define UDPLITE_SEND_CSCOV 10 /* sender partial coverage (as sent) */
-#define UDPLITE_RECV_CSCOV 11 /* receiver partial coverage (threshold ) */
-
-extern struct proto udplite_prot;
-extern struct udp_table udplite_table;
-
-/*
- * Checksum computation is all in software, hence simpler getfrag.
- */
-static __inline__ int udplite_getfrag(void *from, char *to, int offset,
- int len, int odd, struct sk_buff *skb)
-{
- return memcpy_fromiovecend(to, (struct iovec *) from, offset, len);
-}
-
-/* Designate sk as UDP-Lite socket */
-static inline int udplite_sk_init(struct sock *sk)
-{
- udp_sk(sk)->pcflag = UDPLITE_BIT;
- return 0;
-}
-
-/*
- * Checksumming routines
- */
-static inline int udplite_checksum_init(struct sk_buff *skb, struct udphdr *uh)
-{
- u16 cscov;
-
- /* In UDPv4 a zero checksum means that the transmitter generated no
- * checksum. UDP-Lite (like IPv6) mandates checksums, hence packets
- * with a zero checksum field are illegal. */
- if (uh->check == 0) {
- LIMIT_NETDEBUG(KERN_DEBUG "UDPLite: zeroed checksum field\n");
- return 1;
- }
-
- cscov = ntohs(uh->len);
-
- if (cscov == 0) /* Indicates that full coverage is required. */
- ;
- else if (cscov < 8 || cscov > skb->len) {
- /*
- * Coverage length violates RFC 3828: log and discard silently.
- */
- LIMIT_NETDEBUG(KERN_DEBUG "UDPLite: bad csum coverage %d/%d\n",
- cscov, skb->len);
- return 1;
-
- } else if (cscov < skb->len) {
- UDP_SKB_CB(skb)->partial_cov = 1;
- UDP_SKB_CB(skb)->cscov = cscov;
- if (skb->ip_summed == CHECKSUM_COMPLETE)
- skb->ip_summed = CHECKSUM_NONE;
- }
-
- return 0;
-}
-
-/* Slow-path computation of checksum. Socket is locked. */
-static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
-{
- const struct udp_sock *up = udp_sk(skb->sk);
- int cscov = up->len;
- __wsum csum = 0;
-
- if (up->pcflag & UDPLITE_SEND_CC) {
- /*
- * Sender has set `partial coverage' option on UDP-Lite socket.
- * The special case "up->pcslen == 0" signifies full coverage.
- */
- if (up->pcslen < up->len) {
- if (0 < up->pcslen)
- cscov = up->pcslen;
- udp_hdr(skb)->len = htons(up->pcslen);
- }
- /*
- * NOTE: Causes for the error case `up->pcslen > up->len':
- * (i) Application error (will not be penalized).
- * (ii) Payload too big for send buffer: data is split
- * into several packets, each with its own header.
- * In this case (e.g. last segment), coverage may
- * exceed packet length.
- * Since packets with coverage length > packet length are
- * illegal, we fall back to the defaults here.
- */
- }
-
- skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */
-
- skb_queue_walk(&sk->sk_write_queue, skb) {
- const int off = skb_transport_offset(skb);
- const int len = skb->len - off;
-
- csum = skb_checksum(skb, off, (cscov > len)? len : cscov, csum);
-
- if ((cscov -= len) <= 0)
- break;
- }
- return csum;
-}
-
-/* Fast-path computation of checksum. Socket may not be locked. */
-static inline __wsum udplite_csum(struct sk_buff *skb)
-{
- const struct udp_sock *up = udp_sk(skb->sk);
- const int off = skb_transport_offset(skb);
- int len = skb->len - off;
-
- if ((up->pcflag & UDPLITE_SEND_CC) && up->pcslen < len) {
- if (0 < up->pcslen)
- len = up->pcslen;
- udp_hdr(skb)->len = htons(up->pcslen);
- }
- skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */
-
- return skb_checksum(skb, off, len, 0);
-}
-
-extern void udplite4_register(void);
-extern int udplite_get_port(struct sock *sk, unsigned short snum,
- int (*scmp)(const struct sock *, const struct sock *));
-#endif /* _UDPLITE_H */