* net/dccp/dccp.h
*
* An implementation of the DCCP protocol
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <linux/config.h>
#include <linux/dccp.h>
#include <net/snmp.h>
#include <net/sock.h>
#include <net/tcp.h>
-#define DCCP_DEBUG
-
-#ifdef DCCP_DEBUG
+#ifdef CONFIG_IP_DCCP_DEBUG
extern int dccp_debug;
#define dccp_pr_debug(format, a...) \
do { if (dccp_debug) \
printk(KERN_DEBUG "%s: " format, __FUNCTION__ , ##a); \
} while (0)
-#define dccp_pr_debug_cat(format, a...) do { if (dccp_debug) printk(format, ##a); } while (0)
+#define dccp_pr_debug_cat(format, a...) do { if (dccp_debug) \
+ printk(format, ##a); } while (0)
#else
#define dccp_pr_debug(format, a...)
#define dccp_pr_debug_cat(format, a...)
extern struct proto dccp_v4_prot;
/* is seq1 < seq2 ? */
-static inline const int before48(const u64 seq1, const u64 seq2)
+static inline int before48(const u64 seq1, const u64 seq2)
{
- return (const s64)((seq1 << 16) - (seq2 << 16)) < 0;
+ return (s64)((seq1 << 16) - (seq2 << 16)) < 0;
}
/* is seq1 > seq2 ? */
-static inline const int after48(const u64 seq1, const u64 seq2)
+static inline int after48(const u64 seq1, const u64 seq2)
{
- return (const s64)((seq2 << 16) - (seq1 << 16)) < 0;
+ return (s64)((seq2 << 16) - (seq1 << 16)) < 0;
}
/* is seq2 <= seq1 <= seq3 ? */
-static inline const int between48(const u64 seq1, const u64 seq2, const u64 seq3)
+static inline int between48(const u64 seq1, const u64 seq2, const u64 seq3)
{
return (seq3 << 16) - (seq2 << 16) >= (seq1 << 16) - (seq2 << 16);
}
} __SNMP_MIB_ALIGN__;
DECLARE_SNMP_STAT(struct dccp_mib, dccp_statistics);
-#define DCCP_INC_STATS(field) SNMP_INC_STATS(dccp_statistics, field)
-#define DCCP_INC_STATS_BH(field) SNMP_INC_STATS_BH(dccp_statistics, field)
-#define DCCP_INC_STATS_USER(field) SNMP_INC_STATS_USER(dccp_statistics, field)
-#define DCCP_DEC_STATS(field) SNMP_DEC_STATS(dccp_statistics, field)
-#define DCCP_ADD_STATS_BH(field, val) SNMP_ADD_STATS_BH(dccp_statistics, field, val)
-#define DCCP_ADD_STATS_USER(field, val) SNMP_ADD_STATS_USER(dccp_statistics, field, val)
+#define DCCP_INC_STATS(field) SNMP_INC_STATS(dccp_statistics, field)
+#define DCCP_INC_STATS_BH(field) SNMP_INC_STATS_BH(dccp_statistics, field)
+#define DCCP_INC_STATS_USER(field) SNMP_INC_STATS_USER(dccp_statistics, field)
+#define DCCP_DEC_STATS(field) SNMP_DEC_STATS(dccp_statistics, field)
+#define DCCP_ADD_STATS_BH(field, val) \
+ SNMP_ADD_STATS_BH(dccp_statistics, field, val)
+#define DCCP_ADD_STATS_USER(field, val) \
+ SNMP_ADD_STATS_USER(dccp_statistics, field, val)
extern int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb);
extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
extern int dccp_send_response(struct sock *sk);
extern void dccp_send_ack(struct sock *sk);
extern void dccp_send_delayed_ack(struct sock *sk);
-extern void dccp_send_sync(struct sock *sk, u64 seq);
+extern void dccp_send_sync(struct sock *sk, const u64 seq,
+ const enum dccp_pkt_type pkt_type);
+
+extern int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo);
+extern void dccp_write_space(struct sock *sk);
extern void dccp_init_xmit_timers(struct sock *sk);
static inline void dccp_clear_xmit_timers(struct sock *sk)
req->rcv_wnd = 0;
}
-extern void dccp_v4_send_check(struct sock *sk, struct dccp_hdr *dh, int len,
- struct sk_buff *skb);
extern int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
extern struct sock *dccp_create_openreq_child(struct sock *sk,
extern struct sk_buff *dccp_make_response(struct sock *sk,
struct dst_entry *dst,
struct request_sock *req);
+extern struct sk_buff *dccp_make_reset(struct sock *sk,
+ struct dst_entry *dst,
+ enum dccp_reset_codes code);
extern int dccp_connect(struct sock *sk);
extern int dccp_disconnect(struct sock *sk, int flags);
extern int dccp_getsockopt(struct sock *sk, int level, int optname,
- char *optval, int *optlen);
+ char __user *optval, int __user *optlen);
+extern int dccp_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int optlen);
extern int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
-extern int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
- size_t size);
+extern int dccp_sendmsg(struct kiocb *iocb, struct sock *sk,
+ struct msghdr *msg, size_t size);
extern int dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len, int nonblock,
int flags, int *addr_len);
-extern int dccp_setsockopt(struct sock *sk, int level, int optname,
- char *optval, int optlen);
extern void dccp_shutdown(struct sock *sk, int how);
-extern int dccp_v4_checksum(struct sk_buff *skb);
+extern int dccp_v4_checksum(const struct sk_buff *skb,
+ const u32 saddr, const u32 daddr);
-extern int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code);
-extern void dccp_send_close(struct sock *sk);
+extern int dccp_v4_send_reset(struct sock *sk,
+ enum dccp_reset_codes code);
+extern void dccp_send_close(struct sock *sk, const int active);
struct dccp_skb_cb {
__u8 dccpd_type;
static inline void dccp_hdr_set_seq(struct dccp_hdr *dh, const u64 gss)
{
- struct dccp_hdr_ext *dhx = (struct dccp_hdr_ext *)((void *)dh + sizeof(*dh));
+ struct dccp_hdr_ext *dhx = (struct dccp_hdr_ext *)((void *)dh +
+ sizeof(*dh));
#if defined(__LITTLE_ENDIAN_BITFIELD)
dh->dccph_seq = htonl((gss >> 32)) >> 8;
dhx->dccph_seq_low = htonl(gss & 0xffffffff);
}
-static inline void dccp_hdr_set_ack(struct dccp_hdr_ack_bits *dhack, const u64 gsr)
+static inline void dccp_hdr_set_ack(struct dccp_hdr_ack_bits *dhack,
+ const u64 gsr)
{
#if defined(__LITTLE_ENDIAN_BITFIELD)
dhack->dccph_ack_nr_high = htonl((gsr >> 32)) >> 8;
static inline void dccp_update_gsr(struct sock *sk, u64 seq)
{
struct dccp_sock *dp = dccp_sk(sk);
- u64 tmp_gsr;
- dccp_set_seqno(&tmp_gsr, dp->dccps_gsr + 1 - (dp->dccps_options.dccpo_sequence_window / 4));
dp->dccps_gsr = seq;
- dccp_set_seqno(&dp->dccps_swl, max48(tmp_gsr, dp->dccps_isr));
+ dccp_set_seqno(&dp->dccps_swl,
+ (dp->dccps_gsr + 1 -
+ (dp->dccps_options.dccpo_sequence_window / 4)));
dccp_set_seqno(&dp->dccps_swh,
- dp->dccps_gsr + (3 * dp->dccps_options.dccpo_sequence_window) / 4);
+ (dp->dccps_gsr +
+ (3 * dp->dccps_options.dccpo_sequence_window) / 4));
}
static inline void dccp_update_gss(struct sock *sk, u64 seq)
{
struct dccp_sock *dp = dccp_sk(sk);
- u64 tmp_gss;
- dccp_set_seqno(&tmp_gss, dp->dccps_gss - dp->dccps_options.dccpo_sequence_window + 1);
- dp->dccps_awl = max48(tmp_gss, dp->dccps_iss);
dp->dccps_awh = dp->dccps_gss = seq;
+ dccp_set_seqno(&dp->dccps_awl,
+ (dp->dccps_gss -
+ dp->dccps_options.dccpo_sequence_window + 1));
}
extern void dccp_insert_options(struct sock *sk, struct sk_buff *skb);
extern void dccp_insert_option_elapsed_time(struct sock *sk,
struct sk_buff *skb,
u32 elapsed_time);
+extern void dccp_insert_option_timestamp(struct sock *sk,
+ struct sk_buff *skb);
extern void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
unsigned char option,
const void *value, unsigned char len);
*
* @dccpap_buf_head - circular buffer head
* @dccpap_buf_tail - circular buffer tail
- * @dccpap_buf_ackno - ack # of the most recent packet acknoldgeable in the buffer (i.e. %dccpap_buf_head)
- * @dccpap_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked by the buffer with State 0
+ * @dccpap_buf_ackno - ack # of the most recent packet acknowledgeable in the
+ * buffer (i.e. %dccpap_buf_head)
+ * @dccpap_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
+ * by the buffer with State 0
*
* Additionally, the HC-Receiver must keep some information about the
* Ack Vectors it has recently sent. For each packet sent carrying an
* Ack Vector, it remembers four variables:
*
- * @dccpap_ack_seqno - the Sequence Number used for the packet (HC-Receiver seqno)
+ * @dccpap_ack_seqno - the Sequence Number used for the packet
+ * (HC-Receiver seqno)
* @dccpap_ack_ptr - the value of buf_head at the time of acknowledgement.
- * @dccpap_ack_ackno - the Acknowledgement Number used for the packet (HC-Sender seqno)
+ * @dccpap_ack_ackno - the Acknowledgement Number used for the packet
+ * (HC-Sender seqno)
* @dccpap_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
*
* @dccpap_buf_len - circular buffer length
+ * @dccpap_time - the time in usecs
* @dccpap_buf - circular buffer of acknowledgeable packets
*/
struct dccp_ackpkts {
unsigned int dccpap_buf_vector_len;
unsigned int dccpap_ack_vector_len;
unsigned int dccpap_buf_len;
- unsigned long dccpap_time;
+ struct timeval dccpap_time;
u8 dccpap_buf_nonce;
u8 dccpap_ack_nonce;
u8 dccpap_buf[0];
};
-extern struct dccp_ackpkts *dccp_ackpkts_alloc(unsigned int len, int priority);
+extern struct dccp_ackpkts *
+ dccp_ackpkts_alloc(unsigned int len,
+ const unsigned int __nocast priority);
extern void dccp_ackpkts_free(struct dccp_ackpkts *ap);
extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, u64 ackno, u8 state);
extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
struct sock *sk, u64 ackno);
-#ifdef DCCP_DEBUG
+static inline suseconds_t timeval_usecs(const struct timeval *tv)
+{
+ return tv->tv_sec * USEC_PER_SEC + tv->tv_usec;
+}
+
+static inline suseconds_t timeval_delta(const struct timeval *large,
+ const struct timeval *small)
+{
+ time_t secs = large->tv_sec - small->tv_sec;
+ suseconds_t usecs = large->tv_usec - small->tv_usec;
+
+ if (usecs < 0) {
+ secs--;
+ usecs += USEC_PER_SEC;
+ }
+ return secs * USEC_PER_SEC + usecs;
+}
+
+static inline void timeval_add_usecs(struct timeval *tv,
+ const suseconds_t usecs)
+{
+ tv->tv_usec += usecs;
+ while (tv->tv_usec >= USEC_PER_SEC) {
+ tv->tv_sec++;
+ tv->tv_usec -= USEC_PER_SEC;
+ }
+}
+
+static inline void timeval_sub_usecs(struct timeval *tv,
+ const suseconds_t usecs)
+{
+ tv->tv_usec -= usecs;
+ while (tv->tv_usec < 0) {
+ tv->tv_sec--;
+ tv->tv_usec += USEC_PER_SEC;
+ }
+}
+
+/*
+ * Returns the difference in usecs between timeval
+ * passed in and current time
+ */
+static inline suseconds_t timeval_now_delta(const struct timeval *tv)
+{
+ struct timeval now;
+ do_gettimeofday(&now);
+ return timeval_delta(&now, tv);
+}
+
+#ifdef CONFIG_IP_DCCP_DEBUG
extern void dccp_ackvector_print(const u64 ackno,
const unsigned char *vector, int len);
extern void dccp_ackpkts_print(const struct dccp_ackpkts *ap);
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