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-rw-r--r--net/dccp/Makefile2
-rw-r--r--net/dccp/ackvec.c419
-rw-r--r--net/dccp/ackvec.h133
-rw-r--r--net/dccp/ccid.h35
-rw-r--r--net/dccp/ccids/ccid3.c56
-rw-r--r--net/dccp/ccids/ccid3.h23
-rw-r--r--net/dccp/ccids/lib/loss_interval.h2
-rw-r--r--net/dccp/ccids/lib/packet_history.h4
-rw-r--r--net/dccp/dccp.h91
-rw-r--r--net/dccp/input.c95
-rw-r--r--net/dccp/ipv4.c113
-rw-r--r--net/dccp/minisocks.c19
-rw-r--r--net/dccp/options.c443
-rw-r--r--net/dccp/output.c26
-rw-r--r--net/dccp/proto.c94
15 files changed, 875 insertions, 680 deletions
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index fb97bb042455..344a8da153fc 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -3,6 +3,8 @@ obj-$(CONFIG_IP_DCCP) += dccp.o
dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \
timer.o
+dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o
+
obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
dccp_diag-y := diag.o
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
new file mode 100644
index 000000000000..c9a62cca22fc
--- /dev/null
+++ b/net/dccp/ackvec.c
@@ -0,0 +1,419 @@
+/*
+ * net/dccp/ackvec.c
+ *
+ * An implementation of the DCCP protocol
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
+ *
+ * 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; version 2 of the License;
+ */
+
+#include "ackvec.h"
+#include "dccp.h"
+
+#include <linux/dccp.h>
+#include <linux/skbuff.h>
+
+#include <net/sock.h>
+
+int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_ackvec *av = dp->dccps_hc_rx_ackvec;
+ int len = av->dccpav_vec_len + 2;
+ struct timeval now;
+ u32 elapsed_time;
+ unsigned char *to, *from;
+
+ dccp_timestamp(sk, &now);
+ elapsed_time = timeval_delta(&now, &av->dccpav_time) / 10;
+
+ if (elapsed_time != 0)
+ dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
+
+ if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN)
+ return -1;
+
+ /*
+ * XXX: now we have just one ack vector sent record, so
+ * we have to wait for it to be cleared.
+ *
+ * Of course this is not acceptable, but this is just for
+ * basic testing now.
+ */
+ if (av->dccpav_ack_seqno != DCCP_MAX_SEQNO + 1)
+ return -1;
+
+ DCCP_SKB_CB(skb)->dccpd_opt_len += len;
+
+ to = skb_push(skb, len);
+ *to++ = DCCPO_ACK_VECTOR_0;
+ *to++ = len;
+
+ len = av->dccpav_vec_len;
+ from = av->dccpav_buf + av->dccpav_buf_head;
+
+ /* Check if buf_head wraps */
+ if (av->dccpav_buf_head + len > av->dccpav_vec_len) {
+ const u32 tailsize = (av->dccpav_vec_len - av->dccpav_buf_head);
+
+ memcpy(to, from, tailsize);
+ to += tailsize;
+ len -= tailsize;
+ from = av->dccpav_buf;
+ }
+
+ memcpy(to, from, len);
+ /*
+ * From draft-ietf-dccp-spec-11.txt:
+ *
+ * For each acknowledgement it sends, the HC-Receiver will add an
+ * acknowledgement record. ack_seqno will equal the HC-Receiver
+ * sequence number it used for the ack packet; ack_ptr will equal
+ * buf_head; ack_ackno will equal buf_ackno; and ack_nonce will
+ * equal buf_nonce.
+ *
+ * This implemention uses just one ack record for now.
+ */
+ av->dccpav_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
+ av->dccpav_ack_ptr = av->dccpav_buf_head;
+ av->dccpav_ack_ackno = av->dccpav_buf_ackno;
+ av->dccpav_ack_nonce = av->dccpav_buf_nonce;
+ av->dccpav_sent_len = av->dccpav_vec_len;
+
+ dccp_pr_debug("%sACK Vector 0, len=%d, ack_seqno=%llu, "
+ "ack_ackno=%llu\n",
+ debug_prefix, av->dccpav_sent_len,
+ (unsigned long long)av->dccpav_ack_seqno,
+ (unsigned long long)av->dccpav_ack_ackno);
+ return -1;
+}
+
+struct dccp_ackvec *dccp_ackvec_alloc(const unsigned int len,
+ const gfp_t priority)
+{
+ struct dccp_ackvec *av = kmalloc(sizeof(*av) + len, priority);
+
+ if (av != NULL) {
+ av->dccpav_buf_len = len;
+ av->dccpav_buf_head =
+ av->dccpav_buf_tail = av->dccpav_buf_len - 1;
+ av->dccpav_buf_ackno =
+ av->dccpav_ack_ackno = av->dccpav_ack_seqno = ~0LLU;
+ av->dccpav_buf_nonce = av->dccpav_buf_nonce = 0;
+ av->dccpav_ack_ptr = 0;
+ av->dccpav_time.tv_sec = 0;
+ av->dccpav_time.tv_usec = 0;
+ av->dccpav_sent_len = av->dccpav_vec_len = 0;
+ }
+
+ return av;
+}
+
+void dccp_ackvec_free(struct dccp_ackvec *av)
+{
+ kfree(av);
+}
+
+static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
+ const unsigned int index)
+{
+ return av->dccpav_buf[index] & DCCP_ACKVEC_STATE_MASK;
+}
+
+static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
+ const unsigned int index)
+{
+ return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
+}
+
+/*
+ * If several packets are missing, the HC-Receiver may prefer to enter multiple
+ * bytes with run length 0, rather than a single byte with a larger run length;
+ * this simplifies table updates if one of the missing packets arrives.
+ */
+static inline int dccp_ackvec_set_buf_head_state(struct dccp_ackvec *av,
+ const unsigned int packets,
+ const unsigned char state)
+{
+ unsigned int gap;
+ signed long new_head;
+
+ if (av->dccpav_vec_len + packets > av->dccpav_buf_len)
+ return -ENOBUFS;
+
+ gap = packets - 1;
+ new_head = av->dccpav_buf_head - packets;
+
+ if (new_head < 0) {
+ if (gap > 0) {
+ memset(av->dccpav_buf, DCCP_ACKVEC_STATE_NOT_RECEIVED,
+ gap + new_head + 1);
+ gap = -new_head;
+ }
+ new_head += av->dccpav_buf_len;
+ }
+
+ av->dccpav_buf_head = new_head;
+
+ if (gap > 0)
+ memset(av->dccpav_buf + av->dccpav_buf_head + 1,
+ DCCP_ACKVEC_STATE_NOT_RECEIVED, gap);
+
+ av->dccpav_buf[av->dccpav_buf_head] = state;
+ av->dccpav_vec_len += packets;
+ return 0;
+}
+
+/*
+ * Implements the draft-ietf-dccp-spec-11.txt Appendix A
+ */
+int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
+ const u64 ackno, const u8 state)
+{
+ /*
+ * Check at the right places if the buffer is full, if it is, tell the
+ * caller to start dropping packets till the HC-Sender acks our ACK
+ * vectors, when we will free up space in dccpav_buf.
+ *
+ * We may well decide to do buffer compression, etc, but for now lets
+ * just drop.
+ *
+ * From Appendix A:
+ *
+ * Of course, the circular buffer may overflow, either when the
+ * HC-Sender is sending data at a very high rate, when the
+ * HC-Receiver's acknowledgements are not reaching the HC-Sender,
+ * or when the HC-Sender is forgetting to acknowledge those acks
+ * (so the HC-Receiver is unable to clean up old state). In this
+ * case, the HC-Receiver should either compress the buffer (by
+ * increasing run lengths when possible), transfer its state to
+ * a larger buffer, or, as a last resort, drop all received
+ * packets, without processing them whatsoever, until its buffer
+ * shrinks again.
+ */
+
+ /* See if this is the first ackno being inserted */
+ if (av->dccpav_vec_len == 0) {
+ av->dccpav_buf[av->dccpav_buf_head] = state;
+ av->dccpav_vec_len = 1;
+ } else if (after48(ackno, av->dccpav_buf_ackno)) {
+ const u64 delta = dccp_delta_seqno(av->dccpav_buf_ackno,
+ ackno);
+
+ /*
+ * Look if the state of this packet is the same as the
+ * previous ackno and if so if we can bump the head len.
+ */
+ if (delta == 1 &&
+ dccp_ackvec_state(av, av->dccpav_buf_head) == state &&
+ (dccp_ackvec_len(av, av->dccpav_buf_head) <
+ DCCP_ACKVEC_LEN_MASK))
+ av->dccpav_buf[av->dccpav_buf_head]++;
+ else if (dccp_ackvec_set_buf_head_state(av, delta, state))
+ return -ENOBUFS;
+ } else {
+ /*
+ * A.1.2. Old Packets
+ *
+ * When a packet with Sequence Number S arrives, and
+ * S <= buf_ackno, the HC-Receiver will scan the table
+ * for the byte corresponding to S. (Indexing structures
+ * could reduce the complexity of this scan.)
+ */
+ u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
+ unsigned int index = av->dccpav_buf_head;
+
+ while (1) {
+ const u8 len = dccp_ackvec_len(av, index);
+ const u8 state = dccp_ackvec_state(av, index);
+ /*
+ * valid packets not yet in dccpav_buf have a reserved
+ * entry, with a len equal to 0.
+ */
+ if (state == DCCP_ACKVEC_STATE_NOT_RECEIVED &&
+ len == 0 && delta == 0) { /* Found our
+ reserved seat! */
+ dccp_pr_debug("Found %llu reserved seat!\n",
+ (unsigned long long)ackno);
+ av->dccpav_buf[index] = state;
+ goto out;
+ }
+ /* len == 0 means one packet */
+ if (delta < len + 1)
+ goto out_duplicate;
+
+ delta -= len + 1;
+ if (++index == av->dccpav_buf_len)
+ index = 0;
+ }
+ }
+
+ av->dccpav_buf_ackno = ackno;
+ dccp_timestamp(sk, &av->dccpav_time);
+out:
+ dccp_pr_debug("");
+ return 0;
+
+out_duplicate:
+ /* Duplicate packet */
+ dccp_pr_debug("Received a dup or already considered lost "
+ "packet: %llu\n", (unsigned long long)ackno);
+ return -EILSEQ;
+}
+
+#ifdef CONFIG_IP_DCCP_DEBUG
+void dccp_ackvector_print(const u64 ackno, const unsigned char *vector, int len)
+{
+ if (!dccp_debug)
+ return;
+
+ printk("ACK vector len=%d, ackno=%llu |", len,
+ (unsigned long long)ackno);
+
+ while (len--) {
+ const u8 state = (*vector & DCCP_ACKVEC_STATE_MASK) >> 6;
+ const u8 rl = *vector & DCCP_ACKVEC_LEN_MASK;
+
+ printk("%d,%d|", state, rl);
+ ++vector;
+ }
+
+ printk("\n");
+}
+
+void dccp_ackvec_print(const struct dccp_ackvec *av)
+{
+ dccp_ackvector_print(av->dccpav_buf_ackno,
+ av->dccpav_buf + av->dccpav_buf_head,
+ av->dccpav_vec_len);
+}
+#endif
+
+static void dccp_ackvec_trow_away_ack_record(struct dccp_ackvec *av)
+{
+ /*
+ * As we're keeping track of the ack vector size (dccpav_vec_len) and
+ * the sent ack vector size (dccpav_sent_len) we don't need
+ * dccpav_buf_tail at all, but keep this code here as in the future
+ * we'll implement a vector of ack records, as suggested in
+ * draft-ietf-dccp-spec-11.txt Appendix A. -acme
+ */
+#if 0
+ av->dccpav_buf_tail = av->dccpav_ack_ptr + 1;
+ if (av->dccpav_buf_tail >= av->dccpav_vec_len)
+ av->dccpav_buf_tail -= av->dccpav_vec_len;
+#endif
+ av->dccpav_vec_len -= av->dccpav_sent_len;
+}
+
+void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk,
+ const u64 ackno)
+{
+ /* Check if we actually sent an ACK vector */
+ if (av->dccpav_ack_seqno == DCCP_MAX_SEQNO + 1)
+ return;
+
+ if (ackno == av->dccpav_ack_seqno) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx ack: " : "server rx ack: ";
+#endif
+ dccp_pr_debug("%sACK packet 0, len=%d, ack_seqno=%llu, "
+ "ack_ackno=%llu, ACKED!\n",
+ debug_prefix, 1,
+ (unsigned long long)av->dccpav_ack_seqno,
+ (unsigned long long)av->dccpav_ack_ackno);
+ dccp_ackvec_trow_away_ack_record(av);
+ av->dccpav_ack_seqno = DCCP_MAX_SEQNO + 1;
+ }
+}
+
+static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
+ struct sock *sk, u64 ackno,
+ const unsigned char len,
+ const unsigned char *vector)
+{
+ unsigned char i;
+
+ /* Check if we actually sent an ACK vector */
+ if (av->dccpav_ack_seqno == DCCP_MAX_SEQNO + 1)
+ return;
+ /*
+ * We're in the receiver half connection, so if the received an ACK
+ * vector ackno (e.g. 50) before dccpav_ack_seqno (e.g. 52), we're
+ * not interested.
+ *
+ * Extra explanation with example:
+ *
+ * if we received an ACK vector with ackno 50, it can only be acking
+ * 50, 49, 48, etc, not 52 (the seqno for the ACK vector we sent).
+ */
+ /* dccp_pr_debug("is %llu < %llu? ", ackno, av->dccpav_ack_seqno); */
+ if (before48(ackno, av->dccpav_ack_seqno)) {
+ /* dccp_pr_debug_cat("yes\n"); */
+ return;
+ }
+ /* dccp_pr_debug_cat("no\n"); */
+
+ i = len;
+ while (i--) {
+ const u8 rl = *vector & DCCP_ACKVEC_LEN_MASK;
+ u64 ackno_end_rl;
+
+ dccp_set_seqno(&ackno_end_rl, ackno - rl);
+
+ /*
+ * dccp_pr_debug("is %llu <= %llu <= %llu? ", ackno_end_rl,
+ * av->dccpav_ack_seqno, ackno);
+ */
+ if (between48(av->dccpav_ack_seqno, ackno_end_rl, ackno)) {
+ const u8 state = (*vector &
+ DCCP_ACKVEC_STATE_MASK) >> 6;
+ /* dccp_pr_debug_cat("yes\n"); */
+
+ if (state != DCCP_ACKVEC_STATE_NOT_RECEIVED) {
+#ifdef CONFIG_IP_DCCP_DEBUG
+ struct dccp_sock *dp = dccp_sk(sk);
+ const char *debug_prefix =
+ dp->dccps_role == DCCP_ROLE_CLIENT ?
+ "CLIENT rx ack: " : "server rx ack: ";
+#endif
+ dccp_pr_debug("%sACK vector 0, len=%d, "
+ "ack_seqno=%llu, ack_ackno=%llu, "
+ "ACKED!\n",
+ debug_prefix, len,
+ (unsigned long long)
+ av->dccpav_ack_seqno,
+ (unsigned long long)
+ av->dccpav_ack_ackno);
+ dccp_ackvec_trow_away_ack_record(av);
+ }
+ /*
+ * If dccpav_ack_seqno was not received, no problem
+ * we'll send another ACK vector.
+ */
+ av->dccpav_ack_seqno = DCCP_MAX_SEQNO + 1;
+ break;
+ }
+ /* dccp_pr_debug_cat("no\n"); */
+
+ dccp_set_seqno(&ackno, ackno_end_rl - 1);
+ ++vector;
+ }
+}
+
+int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
+ const u8 opt, const u8 *value, const u8 len)
+{
+ if (len > DCCP_MAX_ACKVEC_LEN)
+ return -1;
+
+ /* dccp_ackvector_print(DCCP_SKB_CB(skb)->dccpd_ack_seq, value, len); */
+ dccp_ackvec_check_rcv_ackvector(dccp_sk(sk)->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq,
+ len, value);
+ return 0;
+}
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
new file mode 100644
index 000000000000..d0fd6c60c574
--- /dev/null
+++ b/net/dccp/ackvec.h
@@ -0,0 +1,133 @@
+#ifndef _ACKVEC_H
+#define _ACKVEC_H
+/*
+ * net/dccp/ackvec.h
+ *
+ * An implementation of the DCCP protocol
+ * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@mandriva.com>
+ *
+ * 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/compiler.h>
+#include <linux/time.h>
+#include <linux/types.h>
+
+/* Read about the ECN nonce to see why it is 253 */
+#define DCCP_MAX_ACKVEC_LEN 253
+
+#define DCCP_ACKVEC_STATE_RECEIVED 0
+#define DCCP_ACKVEC_STATE_ECN_MARKED (1 << 6)
+#define DCCP_ACKVEC_STATE_NOT_RECEIVED (3 << 6)
+
+#define DCCP_ACKVEC_STATE_MASK 0xC0 /* 11000000 */
+#define DCCP_ACKVEC_LEN_MASK 0x3F /* 00111111 */
+
+/** struct dccp_ackvec - ack vector
+ *
+ * This data structure is the one defined in the DCCP draft
+ * Appendix A.
+ *
+ * @dccpav_buf_head - circular buffer head
+ * @dccpav_buf_tail - circular buffer tail
+ * @dccpav_buf_ackno - ack # of the most recent packet acknowledgeable in the
+ * buffer (i.e. %dccpav_buf_head)
+ * @dccpav_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:
+ *
+ * @dccpav_ack_seqno - the Sequence Number used for the packet
+ * (HC-Receiver seqno)
+ * @dccpav_ack_ptr - the value of buf_head at the time of acknowledgement.
+ * @dccpav_ack_ackno - the Acknowledgement Number used for the packet
+ * (HC-Sender seqno)
+ * @dccpav_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
+ *
+ * @dccpav_buf_len - circular buffer length
+ * @dccpav_time - the time in usecs
+ * @dccpav_buf - circular buffer of acknowledgeable packets
+ */
+struct dccp_ackvec {
+ unsigned int dccpav_buf_head;
+ unsigned int dccpav_buf_tail;
+ u64 dccpav_buf_ackno;
+ u64 dccpav_ack_seqno;
+ u64 dccpav_ack_ackno;
+ unsigned int dccpav_ack_ptr;
+ unsigned int dccpav_sent_len;
+ unsigned int dccpav_vec_len;
+ unsigned int dccpav_buf_len;
+ struct timeval dccpav_time;
+ u8 dccpav_buf_nonce;
+ u8 dccpav_ack_nonce;
+ u8 dccpav_buf[0];
+};
+
+struct sock;
+struct sk_buff;
+
+#ifdef CONFIG_IP_DCCP_ACKVEC
+extern struct dccp_ackvec *dccp_ackvec_alloc(unsigned int len,
+ const gfp_t priority);
+extern void dccp_ackvec_free(struct dccp_ackvec *av);
+
+extern int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
+ const u64 ackno, const u8 state);
+
+extern void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
+ struct sock *sk, const u64 ackno);
+extern int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
+ const u8 opt, const u8 *value, const u8 len);
+
+extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb);
+
+static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
+{
+ return av->dccpav_sent_len != av->dccpav_vec_len;
+}
+#else /* CONFIG_IP_DCCP_ACKVEC */
+static inline struct dccp_ackvec *dccp_ackvec_alloc(unsigned int len,
+ const gfp_t priority)
+{
+ return NULL;
+}
+
+static inline void dccp_ackvec_free(struct dccp_ackvec *av)
+{
+}
+
+static inline int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
+ const u64 ackno, const u8 state)
+{
+ return -1;
+}
+
+static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
+ struct sock *sk, const u64 ackno)
+{
+}
+
+static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
+ const u8 opt, const u8 *value, const u8 len)
+{
+ return -1;
+}
+
+static inline int dccp_insert_option_ackvec(const struct sock *sk,
+ const struct sk_buff *skb)
+{
+ return -1;
+}
+
+static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
+{
+ return 0;
+}
+#endif /* CONFIG_IP_DCCP_ACKVEC */
+#endif /* _ACKVEC_H */
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index 962f1e9e2f7e..c37eeeaf5c6e 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -14,6 +14,7 @@
*/
#include <net/sock.h>
+#include <linux/compiler.h>
#include <linux/dccp.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -54,6 +55,14 @@ struct ccid {
struct tcp_info *info);
void (*ccid_hc_tx_get_info)(struct sock *sk,
struct tcp_info *info);
+ int (*ccid_hc_rx_getsockopt)(struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval,
+ int __user *optlen);
+ int (*ccid_hc_tx_getsockopt)(struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval,
+ int __user *optlen);
};
extern int ccid_register(struct ccid *ccid);
@@ -101,14 +110,14 @@ static inline int ccid_hc_tx_init(struct ccid *ccid, struct sock *sk)
static inline void ccid_hc_rx_exit(struct ccid *ccid, struct sock *sk)
{
- if (ccid->ccid_hc_rx_exit != NULL &&
+ if (ccid != NULL && ccid->ccid_hc_rx_exit != NULL &&
dccp_sk(sk)->dccps_hc_rx_ccid_private != NULL)
ccid->ccid_hc_rx_exit(sk);
}
static inline void ccid_hc_tx_exit(struct ccid *ccid, struct sock *sk)
{
- if (ccid->ccid_hc_tx_exit != NULL &&
+ if (ccid != NULL && ccid->ccid_hc_tx_exit != NULL &&
dccp_sk(sk)->dccps_hc_tx_ccid_private != NULL)
ccid->ccid_hc_tx_exit(sk);
}
@@ -177,4 +186,26 @@ static inline void ccid_hc_tx_get_info(struct ccid *ccid, struct sock *sk,
if (ccid->ccid_hc_tx_get_info != NULL)
ccid->ccid_hc_tx_get_info(sk, info);
}
+
+static inline int ccid_hc_rx_getsockopt(struct ccid *ccid, struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ int rc = -ENOPROTOOPT;
+ if (ccid->ccid_hc_rx_getsockopt != NULL)
+ rc = ccid->ccid_hc_rx_getsockopt(sk, optname, len,
+ optval, optlen);
+ return rc;
+}
+
+static inline int ccid_hc_tx_getsockopt(struct ccid *ccid, struct sock *sk,
+ const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ int rc = -ENOPROTOOPT;
+ if (ccid->ccid_hc_tx_getsockopt != NULL)
+ rc = ccid->ccid_hc_tx_getsockopt(sk, optname, len,
+ optval, optlen);
+ return rc;
+}
#endif /* _CCID_H */
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 38aa84986118..aa68e0ab274d 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -1120,6 +1120,60 @@ static void ccid3_hc_tx_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_rtt = hctx->ccid3hctx_rtt;
}
+static int ccid3_hc_rx_getsockopt(struct sock *sk, const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ const struct ccid3_hc_rx_sock *hcrx = ccid3_hc_rx_sk(sk);
+ const void *val;
+
+ /* Listen socks doesn't have a private CCID block */
+ if (sk->sk_state == DCCP_LISTEN)
+ return -EINVAL;
+
+ switch (optname) {
+ case DCCP_SOCKOPT_CCID_RX_INFO:
+ if (len < sizeof(hcrx->ccid3hcrx_tfrc))
+ return -EINVAL;
+ len = sizeof(hcrx->ccid3hcrx_tfrc);
+ val = &hcrx->ccid3hcrx_tfrc;
+ break;
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ if (put_user(len, optlen) || copy_to_user(optval, val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ccid3_hc_tx_getsockopt(struct sock *sk, const int optname, int len,
+ u32 __user *optval, int __user *optlen)
+{
+ const struct ccid3_hc_tx_sock *hctx = ccid3_hc_tx_sk(sk);
+ const void *val;
+
+ /* Listen socks doesn't have a private CCID block */
+ if (sk->sk_state == DCCP_LISTEN)
+ return -EINVAL;
+
+ switch (optname) {
+ case DCCP_SOCKOPT_CCID_TX_INFO:
+ if (len < sizeof(hctx->ccid3hctx_tfrc))
+ return -EINVAL;
+ len = sizeof(hctx->ccid3hctx_tfrc);
+ val = &hctx->ccid3hctx_tfrc;
+ break;
+ default:
+ return -ENOPROTOOPT;
+ }
+
+ if (put_user(len, optlen) || copy_to_user(optval, val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
static struct ccid ccid3 = {
.ccid_id = 3,
.ccid_name = "ccid3",
@@ -1139,6 +1193,8 @@ static struct ccid ccid3 = {
.ccid_hc_rx_packet_recv = ccid3_hc_rx_packet_recv,
.ccid_hc_rx_get_info = ccid3_hc_rx_get_info,
.ccid_hc_tx_get_info = ccid3_hc_tx_get_info,
+ .ccid_hc_rx_getsockopt = ccid3_hc_rx_getsockopt,
+ .ccid_hc_tx_getsockopt = ccid3_hc_tx_getsockopt,
};
module_param(ccid3_debug, int, 0444);
diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h
index eb248778eea3..0bde4583d091 100644
--- a/net/dccp/ccids/ccid3.h
+++ b/net/dccp/ccids/ccid3.h
@@ -40,6 +40,7 @@
#include <linux/list.h>
#include <linux/time.h>
#include <linux/types.h>
+#include <linux/tfrc.h>
#define TFRC_MIN_PACKET_SIZE 16
#define TFRC_STD_PACKET_SIZE 256
@@ -93,12 +94,15 @@ struct ccid3_options_received {
* @ccid3hctx_hist - Packet history
*/
struct ccid3_hc_tx_sock {
- u32 ccid3hctx_x;
- u32 ccid3hctx_x_recv;
- u32 ccid3hctx_x_calc;
+ struct tfrc_tx_info ccid3hctx_tfrc;
+#define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x
+#define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv
+#define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc
+#define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt
+#define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p
+#define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto
+#define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi
u16 ccid3hctx_s;
- u32 ccid3hctx_rtt;
- u32 ccid3hctx_p;
u8 ccid3hctx_state;
u8 ccid3hctx_last_win_count;
u8 ccid3hctx_idle;
@@ -106,19 +110,19 @@ struct ccid3_hc_tx_sock {
struct timer_list ccid3hctx_no_feedback_timer;
struct timeval ccid3hctx_t_ld;
struct timeval ccid3hctx_t_nom;
- u32 ccid3hctx_t_rto;
- u32 ccid3hctx_t_ipi;
u32 ccid3hctx_delta;
struct list_head ccid3hctx_hist;
struct ccid3_options_received ccid3hctx_options_received;
};
struct ccid3_hc_rx_sock {
+ struct tfrc_rx_info ccid3hcrx_tfrc;
+#define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv
+#define ccid3hcrx_rtt ccid3hcrx_tfrc.tfrcrx_rtt
+#define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p
u64 ccid3hcrx_seqno_last_counter:48,
ccid3hcrx_state:8,
ccid3hcrx_last_counter:4;
- u32 ccid3hcrx_rtt;
- u32 ccid3hcrx_p;
u32 ccid3hcrx_bytes_recv;
struct timeval ccid3hcrx_tstamp_last_feedback;
struct timeval ccid3hcrx_tstamp_last_ack;
@@ -127,7 +131,6 @@ struct ccid3_hc_rx_sock {
u16 ccid3hcrx_s;
u32 ccid3hcrx_pinv;
u32 ccid3hcrx_elapsed_time;
- u32 ccid3hcrx_x_recv;
};
static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk)
diff --git a/net/dccp/ccids/lib/loss_interval.h b/net/dccp/ccids/lib/loss_interval.h
index 13ad47ba1420..417d9d82df3e 100644
--- a/net/dccp/ccids/lib/loss_interval.h
+++ b/net/dccp/ccids/lib/loss_interval.h
@@ -36,7 +36,7 @@ struct dccp_li_hist_entry {
static inline struct dccp_li_hist_entry *
dccp_li_hist_entry_new(struct dccp_li_hist *hist,
- const unsigned int __nocast prio)
+ const gfp_t prio)
{
return kmem_cache_alloc(hist->dccplih_slab, prio);
}
diff --git a/net/dccp/ccids/lib/packet_history.h b/net/dccp/ccids/lib/packet_history.h
index b375ebdb7dcf..122e96737ff6 100644
--- a/net/dccp/ccids/lib/packet_history.h
+++ b/net/dccp/ccids/lib/packet_history.h
@@ -86,7 +86,7 @@ extern struct dccp_rx_hist_entry *
static inline struct dccp_tx_hist_entry *
dccp_tx_hist_entry_new(struct dccp_tx_hist *hist,
- const unsigned int __nocast prio)
+ const gfp_t prio)
{
struct dccp_tx_hist_entry *entry = kmem_cache_alloc(hist->dccptxh_slab,
prio);
@@ -137,7 +137,7 @@ static inline struct dccp_rx_hist_entry *
const struct sock *sk,
const u32 ndp,
const struct sk_buff *skb,
- const unsigned int __nocast prio)
+ const gfp_t prio)
{
struct dccp_rx_hist_entry *entry = kmem_cache_alloc(hist->dccprxh_slab,
prio);
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 95c4630b3b18..5871c027f9dc 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -17,6 +17,7 @@
#include <net/snmp.h>
#include <net/sock.h>
#include <net/tcp.h>
+#include "ackvec.h"
#ifdef CONFIG_IP_DCCP_DEBUG
extern int dccp_debug;
@@ -258,13 +259,12 @@ extern int dccp_v4_send_reset(struct sock *sk,
extern void dccp_send_close(struct sock *sk, const int active);
struct dccp_skb_cb {
- __u8 dccpd_type;
- __u8 dccpd_reset_code;
- __u8 dccpd_service;
- __u8 dccpd_ccval;
+ __u8 dccpd_type:4;
+ __u8 dccpd_ccval:4;
+ __u8 dccpd_reset_code;
+ __u16 dccpd_opt_len;
__u64 dccpd_seq;
__u64 dccpd_ack_seq;
- int dccpd_opt_len;
};
#define DCCP_SKB_CB(__skb) ((struct dccp_skb_cb *)&((__skb)->cb[0]))
@@ -359,6 +359,17 @@ static inline void dccp_update_gss(struct sock *sk, u64 seq)
(dp->dccps_gss -
dp->dccps_options.dccpo_sequence_window + 1));
}
+
+static inline int dccp_ack_pending(const struct sock *sk)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ return dp->dccps_timestamp_echo != 0 ||
+#ifdef CONFIG_IP_DCCP_ACKVEC
+ (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
+#endif
+ inet_csk_ack_scheduled(sk);
+}
extern void dccp_insert_options(struct sock *sk, struct sk_buff *skb);
extern void dccp_insert_option_elapsed_time(struct sock *sk,
@@ -372,65 +383,6 @@ extern void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
extern struct socket *dccp_ctl_socket;
-#define DCCP_ACKPKTS_STATE_RECEIVED 0
-#define DCCP_ACKPKTS_STATE_ECN_MARKED (1 << 6)
-#define DCCP_ACKPKTS_STATE_NOT_RECEIVED (3 << 6)
-
-#define DCCP_ACKPKTS_STATE_MASK 0xC0 /* 11000000 */
-#define DCCP_ACKPKTS_LEN_MASK 0x3F /* 00111111 */
-
-/** struct dccp_ackpkts - acknowledgeable packets
- *
- * This data structure is the one defined in the DCCP draft
- * Appendix A.
- *
- * @dccpap_buf_head - circular buffer head
- * @dccpap_buf_tail - circular buffer tail
- * @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_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_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_head;
- unsigned int dccpap_buf_tail;
- u64 dccpap_buf_ackno;
- u64 dccpap_ack_seqno;
- u64 dccpap_ack_ackno;
- unsigned int dccpap_ack_ptr;
- unsigned int dccpap_buf_vector_len;
- unsigned int dccpap_ack_vector_len;
- unsigned int dccpap_buf_len;
- 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,
- const unsigned int __nocast priority);
-extern void dccp_ackpkts_free(struct dccp_ackpkts *ap);
-extern int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
- u64 ackno, u8 state);
-extern void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap,
- struct sock *sk, u64 ackno);
-
extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
static inline suseconds_t timeval_usecs(const struct timeval *tv)
@@ -471,15 +423,4 @@ static inline void timeval_sub_usecs(struct timeval *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);
-#else
-static inline void dccp_ackvector_print(const u64 ackno,
- const unsigned char *vector,
- int len) { }
-static inline void dccp_ackpkts_print(const struct dccp_ackpkts *ap) { }
-#endif
-
#endif /* _DCCP_H */
diff --git a/net/dccp/input.c b/net/dccp/input.c
index c74034cf7ede..3454d5941900 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -16,6 +16,7 @@
#include <net/sock.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -60,8 +61,8 @@ static inline void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb)
struct dccp_sock *dp = dccp_sk(sk);
if (dp->dccps_options.dccpo_send_ack_vector)
- dccp_ackpkts_check_rcv_ackno(dp->dccps_hc_rx_ackpkts, sk,
- DCCP_SKB_CB(skb)->dccpd_ack_seq);
+ dccp_ackvec_check_rcv_ackno(dp->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_ack_seq);
}
static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
@@ -164,37 +165,11 @@ int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
dccp_event_ack_recv(sk, skb);
- /*
- * FIXME: check ECN to see if we should use
- * DCCP_ACKPKTS_STATE_ECN_MARKED
- */
- if (dp->dccps_options.dccpo_send_ack_vector) {
- struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
-
- if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
- DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_ACKPKTS_STATE_RECEIVED)) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: acknowledgeable "
- "packets buffer full!\n");
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
- TCP_DELACK_MIN,
- DCCP_RTO_MAX);
- goto discard;
- }
-
- /*
- * FIXME: this activation is probably wrong, have to study more
- * TCP delack machinery and how it fits into DCCP draft, but
- * for now it kinda "works" 8)
- */
- if (!inet_csk_ack_scheduled(sk)) {
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, 5 * HZ,
- DCCP_RTO_MAX);
- }
- }
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_ACKVEC_STATE_RECEIVED))
+ goto discard;
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
@@ -384,9 +359,9 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
}
out_invalid_packet:
- return 1; /* dccp_v4_do_rcv will send a reset, but...
- FIXME: the reset code should be
- DCCP_RESET_CODE_PACKET_ERROR */
+ /* dccp_v4_do_rcv will send a reset */
+ DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR;
+ return 1;
}
static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
@@ -400,6 +375,9 @@ static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
case DCCP_PKT_RESET:
inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
break;
+ case DCCP_PKT_DATA:
+ if (sk->sk_state == DCCP_RESPOND)
+ break;
case DCCP_PKT_DATAACK:
case DCCP_PKT_ACK:
/*
@@ -418,7 +396,8 @@ static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
dccp_sk(sk)->dccps_osr = DCCP_SKB_CB(skb)->dccpd_seq;
dccp_set_state(sk, DCCP_OPEN);
- if (dh->dccph_type == DCCP_PKT_DATAACK) {
+ if (dh->dccph_type == DCCP_PKT_DATAACK ||
+ dh->dccph_type == DCCP_PKT_DATA) {
dccp_rcv_established(sk, skb, dh, len);
queued = 1; /* packet was queued
(by dccp_rcv_established) */
@@ -433,6 +412,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
struct dccp_hdr *dh, unsigned len)
{
struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
const int old_state = sk->sk_state;
int queued = 0;
@@ -473,7 +453,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
if (dh->dccph_type == DCCP_PKT_RESET)
goto discard;
- /* Caller (dccp_v4_do_rcv) will send Reset(No Connection)*/
+ /* Caller (dccp_v4_do_rcv) will send Reset */
+ dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
return 1;
}
@@ -487,36 +468,17 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
if (dccp_parse_options(sk, skb))
goto discard;
- if (DCCP_SKB_CB(skb)->dccpd_ack_seq !=
- DCCP_PKT_WITHOUT_ACK_SEQ)
+ if (dcb->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
dccp_event_ack_recv(sk, skb);
ccid_hc_rx_packet_recv(dp->dccps_hc_rx_ccid, sk, skb);
ccid_hc_tx_packet_recv(dp->dccps_hc_tx_ccid, sk, skb);
- /*
- * FIXME: check ECN to see if we should use
- * DCCP_ACKPKTS_STATE_ECN_MARKED
- */
- if (dp->dccps_options.dccpo_send_ack_vector) {
- if (dccp_ackpkts_add(dp->dccps_hc_rx_ackpkts, sk,
- DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_ACKPKTS_STATE_RECEIVED))
- goto discard;
- /*
- * FIXME: this activation is probably wrong, have to
- * study more TCP delack machinery and how it fits into
- * DCCP draft, but for now it kinda "works" 8)
- */
- if ((dp->dccps_hc_rx_ackpkts->dccpap_ack_seqno ==
- DCCP_MAX_SEQNO + 1) &&
- !inet_csk_ack_scheduled(sk)) {
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
- TCP_DELACK_MIN,
- DCCP_RTO_MAX);
- }
- }
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+ DCCP_SKB_CB(skb)->dccpd_seq,
+ DCCP_ACKVEC_STATE_RECEIVED))
+ goto discard;
}
/*
@@ -551,8 +513,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
dh->dccph_type == DCCP_PKT_REQUEST) ||
(sk->sk_state == DCCP_RESPOND &&
dh->dccph_type == DCCP_PKT_DATA)) {
- dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_PKT_SYNC);
+ dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNC);
goto discard;
} else if (dh->dccph_type == DCCP_PKT_CLOSEREQ) {
dccp_rcv_closereq(sk, skb);
@@ -563,13 +524,13 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
}
if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
- dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
- DCCP_PKT_SYNCACK);
+ dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
goto discard;
}
switch (sk->sk_state) {
case DCCP_CLOSED:
+ dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
return 1;
case DCCP_REQUESTING:
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 2afaa464e7f0..ae088d1347af 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -23,6 +23,7 @@
#include <net/tcp_states.h>
#include <net/xfrm.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -61,27 +62,27 @@ static int __dccp_v4_check_established(struct sock *sk, const __u16 lport,
const int dif = sk->sk_bound_dev_if;
INET_ADDR_COOKIE(acookie, saddr, daddr)
const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
- const int hash = inet_ehashfn(daddr, lport, saddr, inet->dport,
- dccp_hashinfo.ehash_size);
- struct inet_ehash_bucket *head = &dccp_hashinfo.ehash[hash];
+ unsigned int hash = inet_ehashfn(daddr, lport, saddr, inet->dport);
+ struct inet_ehash_bucket *head = inet_ehash_bucket(&dccp_hashinfo, hash);
const struct sock *sk2;
const struct hlist_node *node;
struct inet_timewait_sock *tw;
+ prefetch(head->chain.first);
write_lock(&head->lock);
/* Check TIME-WAIT sockets first. */
sk_for_each(sk2, node, &(head + dccp_hashinfo.ehash_size)->chain) {
tw = inet_twsk(sk2);
- if (INET_TW_MATCH(sk2, acookie, saddr, daddr, ports, dif))
+ if (INET_TW_MATCH(sk2, hash, acookie, saddr, daddr, ports, dif))
goto not_unique;
}
tw = NULL;
/* And established part... */
sk_for_each(sk2, node, &head->chain) {
- if (INET_MATCH(sk2, acookie, saddr, daddr, ports, dif))
+ if (INET_MATCH(sk2, hash, acookie, saddr, daddr, ports, dif))
goto not_unique;
}
@@ -89,7 +90,7 @@ static int __dccp_v4_check_established(struct sock *sk, const __u16 lport,
* in hash table socket with a funny identity. */
inet->num = lport;
inet->sport = htons(lport);
- sk->sk_hashent = hash;
+ sk->sk_hash = hash;
BUG_TRAP(sk_unhashed(sk));
__sk_add_node(sk, &head->chain);
sock_prot_inc_use(sk->sk_prot);
@@ -246,6 +247,9 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
dp->dccps_role = DCCP_ROLE_CLIENT;
+ if (dccp_service_not_initialized(sk))
+ return -EPROTO;
+
if (addr_len < sizeof(struct sockaddr_in))
return -EINVAL;
@@ -661,6 +665,16 @@ static inline u64 dccp_v4_init_sequence(const struct sock *sk,
dccp_hdr(skb)->dccph_sport);
}
+static inline int dccp_bad_service_code(const struct sock *sk,
+ const __u32 service)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+
+ if (dp->dccps_service == service)
+ return 0;
+ return !dccp_list_has_service(dp->dccps_service_list, service);
+}
+
int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
{
struct inet_request_sock *ireq;
@@ -669,13 +683,22 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
struct dccp_request_sock *dreq;
const __u32 saddr = skb->nh.iph->saddr;
const __u32 daddr = skb->nh.iph->daddr;
+ const __u32 service = dccp_hdr_request(skb)->dccph_req_service;
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
+ __u8 reset_code = DCCP_RESET_CODE_TOO_BUSY;
struct dst_entry *dst = NULL;
/* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
if (((struct rtable *)skb->dst)->rt_flags &
- (RTCF_BROADCAST | RTCF_MULTICAST))
+ (RTCF_BROADCAST | RTCF_MULTICAST)) {
+ reset_code = DCCP_RESET_CODE_NO_CONNECTION;
goto drop;
+ }
+ if (dccp_bad_service_code(sk, service)) {
+ reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
+ goto drop;
+ }
/*
* TW buckets are converted to open requests without
* limitations, they conserve resources and peer is
@@ -718,9 +741,9 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
* dccp_create_openreq_child.
*/
dreq = dccp_rsk(req);
- dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq;
- dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
- dreq->dreq_service = dccp_hdr_request(skb)->dccph_req_service;
+ dreq->dreq_isr = dcb->dccpd_seq;
+ dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
+ dreq->dreq_service = service;
if (dccp_v4_send_response(sk, req, dst))
goto drop_and_free;
@@ -735,6 +758,7 @@ drop_and_free:
__reqsk_free(req);
drop:
DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+ dcb->dccpd_reset_code = reset_code;
return -1;
}
@@ -1005,7 +1029,6 @@ int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
reset:
- DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
dccp_v4_ctl_send_reset(skb);
discard:
kfree_skb(skb);
@@ -1090,45 +1113,7 @@ int dccp_v4_rcv(struct sk_buff *skb)
goto discard_it;
dh = dccp_hdr(skb);
-#if 0
- /*
- * Use something like this to simulate some DATA/DATAACK loss to test
- * dccp_ackpkts_add, you'll get something like this on a session that
- * sends 10 DATA/DATAACK packets:
- *
- * ackpkts_print: 281473596467422 |0,0|3,0|0,0|3,0|0,0|3,0|0,0|3,0|0,1|
- *
- * 0, 0 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == just this packet
- * 0, 1 means: DCCP_ACKPKTS_STATE_RECEIVED, RLE == two adjacent packets
- * with the same state
- * 3, 0 means: DCCP_ACKPKTS_STATE_NOT_RECEIVED, RLE == just this packet
- *
- * So...
- *
- * 281473596467422 was received
- * 281473596467421 was not received
- * 281473596467420 was received
- * 281473596467419 was not received
- * 281473596467418 was received
- * 281473596467417 was not received
- * 281473596467416 was received
- * 281473596467415 was not received
- * 281473596467414 was received
- * 281473596467413 was received (this one was the 3way handshake
- * RESPONSE)
- *
- */
- if (dh->dccph_type == DCCP_PKT_DATA ||
- dh->dccph_type == DCCP_PKT_DATAACK) {
- static int discard = 0;
- if (discard) {
- discard = 0;
- goto discard_it;
- }
- discard = 1;
- }
-#endif
DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
@@ -1242,11 +1227,9 @@ static int dccp_v4_init_sock(struct sock *sk)
do_gettimeofday(&dp->dccps_epoch);
if (dp->dccps_options.dccpo_send_ack_vector) {
- dp->dccps_hc_rx_ackpkts =
- dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
- GFP_KERNEL);
-
- if (dp->dccps_hc_rx_ackpkts == NULL)
+ dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(DCCP_MAX_ACKVEC_LEN,
+ GFP_KERNEL);
+ if (dp->dccps_hc_rx_ackvec == NULL)
return -ENOMEM;
}
@@ -1258,16 +1241,18 @@ static int dccp_v4_init_sock(struct sock *sk)
* setsockopt(CCIDs-I-want/accept). -acme
*/
if (likely(!dccp_ctl_socket_init)) {
- dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ dp->dccps_hc_rx_ccid = ccid_init(dp->dccps_options.dccpo_rx_ccid,
sk);
- dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_ccid,
+ dp->dccps_hc_tx_ccid = ccid_init(dp->dccps_options.dccpo_tx_ccid,
sk);
if (dp->dccps_hc_rx_ccid == NULL ||
dp->dccps_hc_tx_ccid == NULL) {
ccid_exit(dp->dccps_hc_rx_ccid, sk);
ccid_exit(dp->dccps_hc_tx_ccid, sk);
- dccp_ackpkts_free(dp->dccps_hc_rx_ackpkts);
- dp->dccps_hc_rx_ackpkts = NULL;
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+ dp->dccps_hc_rx_ackvec = NULL;
+ }
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
return -ENOMEM;
}
@@ -1280,6 +1265,7 @@ static int dccp_v4_init_sock(struct sock *sk)
sk->sk_write_space = dccp_write_space;
dp->dccps_mss_cache = 536;
dp->dccps_role = DCCP_ROLE_UNDEFINED;
+ dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
return 0;
}
@@ -1301,10 +1287,17 @@ static int dccp_v4_destroy_sock(struct sock *sk)
if (inet_csk(sk)->icsk_bind_hash != NULL)
inet_put_port(&dccp_hashinfo, sk);
+ if (dp->dccps_service_list != NULL) {
+ kfree(dp->dccps_service_list);
+ dp->dccps_service_list = NULL;
+ }
+
ccid_hc_rx_exit(dp->dccps_hc_rx_ccid, sk);
ccid_hc_tx_exit(dp->dccps_hc_tx_ccid, sk);
- dccp_ackpkts_free(dp->dccps_hc_rx_ackpkts);
- dp->dccps_hc_rx_ackpkts = NULL;
+ if (dp->dccps_options.dccpo_send_ack_vector) {
+ dccp_ackvec_free(dp->dccps_hc_rx_ackvec);
+ dp->dccps_hc_rx_ackvec = NULL;
+ }
ccid_exit(dp->dccps_hc_rx_ccid, sk);
ccid_exit(dp->dccps_hc_tx_ccid, sk);
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 18461bc04cbe..1393461898bb 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -19,6 +19,7 @@
#include <net/xfrm.h>
#include <net/inet_timewait_sock.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -93,22 +94,24 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
struct inet_connection_sock *newicsk = inet_csk(sk);
struct dccp_sock *newdp = dccp_sk(newsk);
- newdp->dccps_hc_rx_ackpkts = NULL;
- newdp->dccps_role = DCCP_ROLE_SERVER;
- newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
+ newdp->dccps_role = DCCP_ROLE_SERVER;
+ newdp->dccps_hc_rx_ackvec = NULL;
+ newdp->dccps_service_list = NULL;
+ newdp->dccps_service = dreq->dreq_service;
+ newicsk->icsk_rto = DCCP_TIMEOUT_INIT;
do_gettimeofday(&newdp->dccps_epoch);
if (newdp->dccps_options.dccpo_send_ack_vector) {
- newdp->dccps_hc_rx_ackpkts =
- dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN,
- GFP_ATOMIC);
+ newdp->dccps_hc_rx_ackvec =
+ dccp_ackvec_alloc(DCCP_MAX_ACKVEC_LEN,
+ GFP_ATOMIC);
/*
* XXX: We're using the same CCIDs set on the parent,
* i.e. sk_clone copied the master sock and left the
* CCID pointers for this child, that is why we do the
* __ccid_get calls.
*/
- if (unlikely(newdp->dccps_hc_rx_ackpkts == NULL))
+ if (unlikely(newdp->dccps_hc_rx_ackvec == NULL))
goto out_free;
}
@@ -116,7 +119,7 @@ struct sock *dccp_create_openreq_child(struct sock *sk,
newsk) != 0 ||
ccid_hc_tx_init(newdp->dccps_hc_tx_ccid,
newsk) != 0)) {
- dccp_ackpkts_free(newdp->dccps_hc_rx_ackpkts);
+ dccp_ackvec_free(newdp->dccps_hc_rx_ackvec);
ccid_hc_rx_exit(newdp->dccps_hc_rx_ccid, newsk);
ccid_hc_tx_exit(newdp->dccps_hc_tx_ccid, newsk);
out_free:
diff --git a/net/dccp/options.c b/net/dccp/options.c
index d4c4242d8dd7..0a76426c9aea 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -18,19 +18,15 @@
#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
-static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
- struct sock *sk,
- const u64 ackno,
- const unsigned char len,
- const unsigned char *vector);
-
/* stores the default values for new connection. may be changed with sysctl */
static const struct dccp_options dccpo_default_values = {
.dccpo_sequence_window = DCCPF_INITIAL_SEQUENCE_WINDOW,
- .dccpo_ccid = DCCPF_INITIAL_CCID,
+ .dccpo_rx_ccid = DCCPF_INITIAL_CCID,
+ .dccpo_tx_ccid = DCCPF_INITIAL_CCID,
.dccpo_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR,
.dccpo_send_ndp_count = DCCPF_INITIAL_SEND_NDP_COUNT,
};
@@ -113,25 +109,13 @@ int dccp_parse_options(struct sock *sk, struct sk_buff *skb)
opt_recv->dccpor_ndp);
break;
case DCCPO_ACK_VECTOR_0:
- if (len > DCCP_MAX_ACK_VECTOR_LEN)
- goto out_invalid_option;
-
+ case DCCPO_ACK_VECTOR_1:
if (pkt_type == DCCP_PKT_DATA)
continue;
- opt_recv->dccpor_ack_vector_len = len;
- opt_recv->dccpor_ack_vector_idx = value - options;
-
- dccp_pr_debug("%sACK vector 0, len=%d, ack_ackno=%llu\n",
- debug_prefix, len,
- (unsigned long long)
- DCCP_SKB_CB(skb)->dccpd_ack_seq);
- dccp_ackvector_print(DCCP_SKB_CB(skb)->dccpd_ack_seq,
- value, len);
- dccp_ackpkts_check_rcv_ackvector(dp->dccps_hc_rx_ackpkts,
- sk,
- DCCP_SKB_CB(skb)->dccpd_ack_seq,
- len, value);
+ if (dp->dccps_options.dccpo_send_ack_vector &&
+ dccp_ackvec_parse(sk, skb, opt, value, len))
+ goto out_invalid_option;
break;
case DCCPO_TIMESTAMP:
if (len != 4)
@@ -352,86 +336,6 @@ void dccp_insert_option_elapsed_time(struct sock *sk,
EXPORT_SYMBOL_GPL(dccp_insert_option_elapsed_time);
-static void dccp_insert_option_ack_vector(struct sock *sk, struct sk_buff *skb)
-{
- struct dccp_sock *dp = dccp_sk(sk);
-#ifdef CONFIG_IP_DCCP_DEBUG
- const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT TX opt: " : "server TX opt: ";
-#endif
- struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
- int len = ap->dccpap_buf_vector_len + 2;
- struct timeval now;
- u32 elapsed_time;
- unsigned char *to, *from;
-
- dccp_timestamp(sk, &now);
- elapsed_time = timeval_delta(&now, &ap->dccpap_time) / 10;
-
- if (elapsed_time != 0)
- dccp_insert_option_elapsed_time(sk, skb, elapsed_time);
-
- if (DCCP_SKB_CB(skb)->dccpd_opt_len + len > DCCP_MAX_OPT_LEN) {
- LIMIT_NETDEBUG(KERN_INFO "DCCP: packet too small to "
- "insert ACK Vector!\n");
- return;
- }
-
- /*
- * XXX: now we have just one ack vector sent record, so
- * we have to wait for it to be cleared.
- *
- * Of course this is not acceptable, but this is just for
- * basic testing now.
- */
- if (ap->dccpap_ack_seqno != DCCP_MAX_SEQNO + 1)
- return;
-
- DCCP_SKB_CB(skb)->dccpd_opt_len += len;
-
- to = skb_push(skb, len);
- *to++ = DCCPO_ACK_VECTOR_0;
- *to++ = len;
-
- len = ap->dccpap_buf_vector_len;
- from = ap->dccpap_buf + ap->dccpap_buf_head;
-
- /* Check if buf_head wraps */
- if (ap->dccpap_buf_head + len > ap->dccpap_buf_len) {
- const unsigned int tailsize = (ap->dccpap_buf_len -
- ap->dccpap_buf_head);
-
- memcpy(to, from, tailsize);
- to += tailsize;
- len -= tailsize;
- from = ap->dccpap_buf;
- }
-
- memcpy(to, from, len);
- /*
- * From draft-ietf-dccp-spec-11.txt:
- *
- * For each acknowledgement it sends, the HC-Receiver will add an
- * acknowledgement record. ack_seqno will equal the HC-Receiver
- * sequence number it used for the ack packet; ack_ptr will equal
- * buf_head; ack_ackno will equal buf_ackno; and ack_nonce will
- * equal buf_nonce.
- *
- * This implemention uses just one ack record for now.
- */
- ap->dccpap_ack_seqno = DCCP_SKB_CB(skb)->dccpd_seq;
- ap->dccpap_ack_ptr = ap->dccpap_buf_head;
- ap->dccpap_ack_ackno = ap->dccpap_buf_ackno;
- ap->dccpap_ack_nonce = ap->dccpap_buf_nonce;
- ap->dccpap_ack_vector_len = ap->dccpap_buf_vector_len;
-
- dccp_pr_debug("%sACK Vector 0, len=%d, ack_seqno=%llu, "
- "ack_ackno=%llu\n",
- debug_prefix, ap->dccpap_ack_vector_len,
- (unsigned long long) ap->dccpap_ack_seqno,
- (unsigned long long) ap->dccpap_ack_ackno);
-}
-
void dccp_timestamp(const struct sock *sk, struct timeval *tv)
{
const struct dccp_sock *dp = dccp_sk(sk);
@@ -528,9 +432,8 @@ void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
if (!dccp_packet_without_ack(skb)) {
if (dp->dccps_options.dccpo_send_ack_vector &&
- (dp->dccps_hc_rx_ackpkts->dccpap_buf_ackno !=
- DCCP_MAX_SEQNO + 1))
- dccp_insert_option_ack_vector(sk, skb);
+ dccp_ackvec_pending(dp->dccps_hc_rx_ackvec))
+ dccp_insert_option_ackvec(sk, skb);
if (dp->dccps_timestamp_echo != 0)
dccp_insert_option_timestamp_echo(sk, skb);
}
@@ -557,331 +460,3 @@ void dccp_insert_options(struct sock *sk, struct sk_buff *skb)
}
}
}
-
-struct dccp_ackpkts *dccp_ackpkts_alloc(const unsigned int len,
- const unsigned int __nocast priority)
-{
- struct dccp_ackpkts *ap = kmalloc(sizeof(*ap) + len, priority);
-
- if (ap != NULL) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- memset(ap->dccpap_buf, 0xFF, len);
-#endif
- ap->dccpap_buf_len = len;
- ap->dccpap_buf_head =
- ap->dccpap_buf_tail =
- ap->dccpap_buf_len - 1;
- ap->dccpap_buf_ackno =
- ap->dccpap_ack_ackno =
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- ap->dccpap_buf_nonce = ap->dccpap_buf_nonce = 0;
- ap->dccpap_ack_ptr = 0;
- ap->dccpap_time.tv_sec = 0;
- ap->dccpap_time.tv_usec = 0;
- ap->dccpap_buf_vector_len = ap->dccpap_ack_vector_len = 0;
- }
-
- return ap;
-}
-
-void dccp_ackpkts_free(struct dccp_ackpkts *ap)
-{
- if (ap != NULL) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- memset(ap, 0xFF, sizeof(*ap) + ap->dccpap_buf_len);
-#endif
- kfree(ap);
- }
-}
-
-static inline u8 dccp_ackpkts_state(const struct dccp_ackpkts *ap,
- const unsigned int index)
-{
- return ap->dccpap_buf[index] & DCCP_ACKPKTS_STATE_MASK;
-}
-
-static inline u8 dccp_ackpkts_len(const struct dccp_ackpkts *ap,
- const unsigned int index)
-{
- return ap->dccpap_buf[index] & DCCP_ACKPKTS_LEN_MASK;
-}
-
-/*
- * If several packets are missing, the HC-Receiver may prefer to enter multiple
- * bytes with run length 0, rather than a single byte with a larger run length;
- * this simplifies table updates if one of the missing packets arrives.
- */
-static inline int dccp_ackpkts_set_buf_head_state(struct dccp_ackpkts *ap,
- const unsigned int packets,
- const unsigned char state)
-{
- unsigned int gap;
- signed long new_head;
-
- if (ap->dccpap_buf_vector_len + packets > ap->dccpap_buf_len)
- return -ENOBUFS;
-
- gap = packets - 1;
- new_head = ap->dccpap_buf_head - packets;
-
- if (new_head < 0) {
- if (gap > 0) {
- memset(ap->dccpap_buf, DCCP_ACKPKTS_STATE_NOT_RECEIVED,
- gap + new_head + 1);
- gap = -new_head;
- }
- new_head += ap->dccpap_buf_len;
- }
-
- ap->dccpap_buf_head = new_head;
-
- if (gap > 0)
- memset(ap->dccpap_buf + ap->dccpap_buf_head + 1,
- DCCP_ACKPKTS_STATE_NOT_RECEIVED, gap);
-
- ap->dccpap_buf[ap->dccpap_buf_head] = state;
- ap->dccpap_buf_vector_len += packets;
- return 0;
-}
-
-/*
- * Implements the draft-ietf-dccp-spec-11.txt Appendix A
- */
-int dccp_ackpkts_add(struct dccp_ackpkts *ap, const struct sock *sk,
- u64 ackno, u8 state)
-{
- /*
- * Check at the right places if the buffer is full, if it is, tell the
- * caller to start dropping packets till the HC-Sender acks our ACK
- * vectors, when we will free up space in dccpap_buf.
- *
- * We may well decide to do buffer compression, etc, but for now lets
- * just drop.
- *
- * From Appendix A:
- *
- * Of course, the circular buffer may overflow, either when the
- * HC-Sender is sending data at a very high rate, when the
- * HC-Receiver's acknowledgements are not reaching the HC-Sender,
- * or when the HC-Sender is forgetting to acknowledge those acks
- * (so the HC-Receiver is unable to clean up old state). In this
- * case, the HC-Receiver should either compress the buffer (by
- * increasing run lengths when possible), transfer its state to
- * a larger buffer, or, as a last resort, drop all received
- * packets, without processing them whatsoever, until its buffer
- * shrinks again.
- */
-
- /* See if this is the first ackno being inserted */
- if (ap->dccpap_buf_vector_len == 0) {
- ap->dccpap_buf[ap->dccpap_buf_head] = state;
- ap->dccpap_buf_vector_len = 1;
- } else if (after48(ackno, ap->dccpap_buf_ackno)) {
- const u64 delta = dccp_delta_seqno(ap->dccpap_buf_ackno,
- ackno);
-
- /*
- * Look if the state of this packet is the same as the
- * previous ackno and if so if we can bump the head len.
- */
- if (delta == 1 &&
- dccp_ackpkts_state(ap, ap->dccpap_buf_head) == state &&
- (dccp_ackpkts_len(ap, ap->dccpap_buf_head) <
- DCCP_ACKPKTS_LEN_MASK))
- ap->dccpap_buf[ap->dccpap_buf_head]++;
- else if (dccp_ackpkts_set_buf_head_state(ap, delta, state))
- return -ENOBUFS;
- } else {
- /*
- * A.1.2. Old Packets
- *
- * When a packet with Sequence Number S arrives, and
- * S <= buf_ackno, the HC-Receiver will scan the table
- * for the byte corresponding to S. (Indexing structures
- * could reduce the complexity of this scan.)
- */
- u64 delta = dccp_delta_seqno(ackno, ap->dccpap_buf_ackno);
- unsigned int index = ap->dccpap_buf_head;
-
- while (1) {
- const u8 len = dccp_ackpkts_len(ap, index);
- const u8 state = dccp_ackpkts_state(ap, index);
- /*
- * valid packets not yet in dccpap_buf have a reserved
- * entry, with a len equal to 0.
- */
- if (state == DCCP_ACKPKTS_STATE_NOT_RECEIVED &&
- len == 0 && delta == 0) { /* Found our
- reserved seat! */
- dccp_pr_debug("Found %llu reserved seat!\n",
- (unsigned long long) ackno);
- ap->dccpap_buf[index] = state;
- goto out;
- }
- /* len == 0 means one packet */
- if (delta < len + 1)
- goto out_duplicate;
-
- delta -= len + 1;
- if (++index == ap->dccpap_buf_len)
- index = 0;
- }
- }
-
- ap->dccpap_buf_ackno = ackno;
- dccp_timestamp(sk, &ap->dccpap_time);
-out:
- dccp_pr_debug("");
- dccp_ackpkts_print(ap);
- return 0;
-
-out_duplicate:
- /* Duplicate packet */
- dccp_pr_debug("Received a dup or already considered lost "
- "packet: %llu\n", (unsigned long long) ackno);
- return -EILSEQ;
-}
-
-#ifdef CONFIG_IP_DCCP_DEBUG
-void dccp_ackvector_print(const u64 ackno, const unsigned char *vector,
- int len)
-{
- if (!dccp_debug)
- return;
-
- printk("ACK vector len=%d, ackno=%llu |", len,
- (unsigned long long) ackno);
-
- while (len--) {
- const u8 state = (*vector & DCCP_ACKPKTS_STATE_MASK) >> 6;
- const u8 rl = (*vector & DCCP_ACKPKTS_LEN_MASK);
-
- printk("%d,%d|", state, rl);
- ++vector;
- }
-
- printk("\n");
-}
-
-void dccp_ackpkts_print(const struct dccp_ackpkts *ap)
-{
- dccp_ackvector_print(ap->dccpap_buf_ackno,
- ap->dccpap_buf + ap->dccpap_buf_head,
- ap->dccpap_buf_vector_len);
-}
-#endif
-
-static void dccp_ackpkts_trow_away_ack_record(struct dccp_ackpkts *ap)
-{
- /*
- * As we're keeping track of the ack vector size
- * (dccpap_buf_vector_len) and the sent ack vector size
- * (dccpap_ack_vector_len) we don't need dccpap_buf_tail at all, but
- * keep this code here as in the future we'll implement a vector of
- * ack records, as suggested in draft-ietf-dccp-spec-11.txt
- * Appendix A. -acme
- */
-#if 0
- ap->dccpap_buf_tail = ap->dccpap_ack_ptr + 1;
- if (ap->dccpap_buf_tail >= ap->dccpap_buf_len)
- ap->dccpap_buf_tail -= ap->dccpap_buf_len;
-#endif
- ap->dccpap_buf_vector_len -= ap->dccpap_ack_vector_len;
-}
-
-void dccp_ackpkts_check_rcv_ackno(struct dccp_ackpkts *ap, struct sock *sk,
- u64 ackno)
-{
- /* Check if we actually sent an ACK vector */
- if (ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1)
- return;
-
- if (ackno == ap->dccpap_ack_seqno) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- struct dccp_sock *dp = dccp_sk(sk);
- const char *debug_prefix = dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT rx ack: " : "server rx ack: ";
-#endif
- dccp_pr_debug("%sACK packet 0, len=%d, ack_seqno=%llu, "
- "ack_ackno=%llu, ACKED!\n",
- debug_prefix, 1,
- (unsigned long long) ap->dccpap_ack_seqno,
- (unsigned long long) ap->dccpap_ack_ackno);
- dccp_ackpkts_trow_away_ack_record(ap);
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- }
-}
-
-static void dccp_ackpkts_check_rcv_ackvector(struct dccp_ackpkts *ap,
- struct sock *sk, u64 ackno,
- const unsigned char len,
- const unsigned char *vector)
-{
- unsigned char i;
-
- /* Check if we actually sent an ACK vector */
- if (ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1)
- return;
- /*
- * We're in the receiver half connection, so if the received an ACK
- * vector ackno (e.g. 50) before dccpap_ack_seqno (e.g. 52), we're
- * not interested.
- *
- * Extra explanation with example:
- *
- * if we received an ACK vector with ackno 50, it can only be acking
- * 50, 49, 48, etc, not 52 (the seqno for the ACK vector we sent).
- */
- /* dccp_pr_debug("is %llu < %llu? ", ackno, ap->dccpap_ack_seqno); */
- if (before48(ackno, ap->dccpap_ack_seqno)) {
- /* dccp_pr_debug_cat("yes\n"); */
- return;
- }
- /* dccp_pr_debug_cat("no\n"); */
-
- i = len;
- while (i--) {
- const u8 rl = (*vector & DCCP_ACKPKTS_LEN_MASK);
- u64 ackno_end_rl;
-
- dccp_set_seqno(&ackno_end_rl, ackno - rl);
-
- /*
- * dccp_pr_debug("is %llu <= %llu <= %llu? ", ackno_end_rl,
- * ap->dccpap_ack_seqno, ackno);
- */
- if (between48(ap->dccpap_ack_seqno, ackno_end_rl, ackno)) {
- const u8 state = (*vector &
- DCCP_ACKPKTS_STATE_MASK) >> 6;
- /* dccp_pr_debug_cat("yes\n"); */
-
- if (state != DCCP_ACKPKTS_STATE_NOT_RECEIVED) {
-#ifdef CONFIG_IP_DCCP_DEBUG
- struct dccp_sock *dp = dccp_sk(sk);
- const char *debug_prefix =
- dp->dccps_role == DCCP_ROLE_CLIENT ?
- "CLIENT rx ack: " : "server rx ack: ";
-#endif
- dccp_pr_debug("%sACK vector 0, len=%d, "
- "ack_seqno=%llu, ack_ackno=%llu, "
- "ACKED!\n",
- debug_prefix, len,
- (unsigned long long)
- ap->dccpap_ack_seqno,
- (unsigned long long)
- ap->dccpap_ack_ackno);
- dccp_ackpkts_trow_away_ack_record(ap);
- }
- /*
- * If dccpap_ack_seqno was not received, no problem
- * we'll send another ACK vector.
- */
- ap->dccpap_ack_seqno = DCCP_MAX_SEQNO + 1;
- break;
- }
- /* dccp_pr_debug_cat("no\n"); */
-
- dccp_set_seqno(&ackno, ackno_end_rl - 1);
- ++vector;
- }
-}
diff --git a/net/dccp/output.c b/net/dccp/output.c
index ea6d0e91e511..4786bdcddcc9 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -16,6 +16,7 @@
#include <net/sock.h>
+#include "ackvec.h"
#include "ccid.h"
#include "dccp.h"
@@ -85,7 +86,7 @@ int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
switch (dcb->dccpd_type) {
case DCCP_PKT_REQUEST:
dccp_hdr_request(skb)->dccph_req_service =
- dcb->dccpd_service;
+ dp->dccps_service;
break;
case DCCP_PKT_RESET:
dccp_hdr_reset(skb)->dccph_reset_code =
@@ -225,7 +226,6 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
err = dccp_wait_for_ccid(sk, skb, timeo);
if (err == 0) {
- const struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
const int len = skb->len;
@@ -236,15 +236,7 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
inet_csk(sk)->icsk_rto,
DCCP_RTO_MAX);
dcb->dccpd_type = DCCP_PKT_DATAACK;
- /*
- * FIXME: we really should have a
- * dccps_ack_pending or use icsk.
- */
- } else if (inet_csk_ack_scheduled(sk) ||
- dp->dccps_timestamp_echo != 0 ||
- (dp->dccps_options.dccpo_send_ack_vector &&
- ap->dccpap_buf_ackno != DCCP_MAX_SEQNO + 1 &&
- ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1))
+ } else if (dccp_ack_pending(sk))
dcb->dccpd_type = DCCP_PKT_DATAACK;
else
dcb->dccpd_type = DCCP_PKT_DATA;
@@ -270,6 +262,7 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
struct request_sock *req)
{
struct dccp_hdr *dh;
+ struct dccp_request_sock *dreq;
const int dccp_header_size = sizeof(struct dccp_hdr) +
sizeof(struct dccp_hdr_ext) +
sizeof(struct dccp_hdr_response);
@@ -285,8 +278,9 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
skb->dst = dst_clone(dst);
skb->csum = 0;
+ dreq = dccp_rsk(req);
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_RESPONSE;
- DCCP_SKB_CB(skb)->dccpd_seq = dccp_rsk(req)->dreq_iss;
+ DCCP_SKB_CB(skb)->dccpd_seq = dreq->dreq_iss;
dccp_insert_options(sk, skb);
skb->h.raw = skb_push(skb, dccp_header_size);
@@ -300,8 +294,9 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
DCCP_SKB_CB(skb)->dccpd_opt_len) / 4;
dh->dccph_type = DCCP_PKT_RESPONSE;
dh->dccph_x = 1;
- dccp_hdr_set_seq(dh, dccp_rsk(req)->dreq_iss);
- dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dccp_rsk(req)->dreq_isr);
+ dccp_hdr_set_seq(dh, dreq->dreq_iss);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dreq->dreq_isr);
+ dccp_hdr_response(skb)->dccph_resp_service = dreq->dreq_service;
dh->dccph_checksum = dccp_v4_checksum(skb, inet_rsk(req)->loc_addr,
inet_rsk(req)->rmt_addr);
@@ -397,9 +392,6 @@ int dccp_connect(struct sock *sk)
skb_reserve(skb, MAX_DCCP_HEADER);
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_REQUEST;
- /* FIXME: set service to something meaningful, coming
- * from userspace*/
- DCCP_SKB_CB(skb)->dccpd_service = 0;
skb->csum = 0;
skb_set_owner_w(skb, sk);
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 18a0e69c9dc7..a1cfd0e9e3bc 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -94,7 +94,15 @@ EXPORT_SYMBOL_GPL(dccp_state_name);
static inline int dccp_listen_start(struct sock *sk)
{
- dccp_sk(sk)->dccps_role = DCCP_ROLE_LISTEN;
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ dp->dccps_role = DCCP_ROLE_LISTEN;
+ /*
+ * Apps need to use setsockopt(DCCP_SOCKOPT_SERVICE)
+ * before calling listen()
+ */
+ if (dccp_service_not_initialized(sk))
+ return -EPROTO;
return inet_csk_listen_start(sk, TCP_SYNQ_HSIZE);
}
@@ -202,6 +210,42 @@ int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
return -ENOIOCTLCMD;
}
+static int dccp_setsockopt_service(struct sock *sk, const u32 service,
+ char __user *optval, int optlen)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct dccp_service_list *sl = NULL;
+
+ if (service == DCCP_SERVICE_INVALID_VALUE ||
+ optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32))
+ return -EINVAL;
+
+ if (optlen > sizeof(service)) {
+ sl = kmalloc(optlen, GFP_KERNEL);
+ if (sl == NULL)
+ return -ENOMEM;
+
+ sl->dccpsl_nr = optlen / sizeof(u32) - 1;
+ if (copy_from_user(sl->dccpsl_list,
+ optval + sizeof(service),
+ optlen - sizeof(service)) ||
+ dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) {
+ kfree(sl);
+ return -EFAULT;
+ }
+ }
+
+ lock_sock(sk);
+ dp->dccps_service = service;
+
+ if (dp->dccps_service_list != NULL)
+ kfree(dp->dccps_service_list);
+
+ dp->dccps_service_list = sl;
+ release_sock(sk);
+ return 0;
+}
+
int dccp_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen)
{
@@ -218,8 +262,10 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
if (get_user(val, (int __user *)optval))
return -EFAULT;
- lock_sock(sk);
+ if (optname == DCCP_SOCKOPT_SERVICE)
+ return dccp_setsockopt_service(sk, val, optval, optlen);
+ lock_sock(sk);
dp = dccp_sk(sk);
err = 0;
@@ -236,6 +282,37 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
return err;
}
+static int dccp_getsockopt_service(struct sock *sk, int len,
+ u32 __user *optval,
+ int __user *optlen)
+{
+ const struct dccp_sock *dp = dccp_sk(sk);
+ const struct dccp_service_list *sl;
+ int err = -ENOENT, slen = 0, total_len = sizeof(u32);
+
+ lock_sock(sk);
+ if (dccp_service_not_initialized(sk))
+ goto out;
+
+ if ((sl = dp->dccps_service_list) != NULL) {
+ slen = sl->dccpsl_nr * sizeof(u32);
+ total_len += slen;
+ }
+
+ err = -EINVAL;
+ if (total_len > len)
+ goto out;
+
+ err = 0;
+ if (put_user(total_len, optlen) ||
+ put_user(dp->dccps_service, optval) ||
+ (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen)))
+ err = -EFAULT;
+out:
+ release_sock(sk);
+ return err;
+}
+
int dccp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -248,8 +325,7 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
if (get_user(len, optlen))
return -EFAULT;
- len = min_t(unsigned int, len, sizeof(int));
- if (len < 0)
+ if (len < sizeof(int))
return -EINVAL;
dp = dccp_sk(sk);
@@ -257,7 +333,17 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
switch (optname) {
case DCCP_SOCKOPT_PACKET_SIZE:
val = dp->dccps_packet_size;
+ len = sizeof(dp->dccps_packet_size);
break;
+ case DCCP_SOCKOPT_SERVICE:
+ return dccp_getsockopt_service(sk, len,
+ (u32 __user *)optval, optlen);
+ case 128 ... 191:
+ return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname,
+ len, (u32 __user *)optval, optlen);
+ case 192 ... 255:
+ return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname,
+ len, (u32 __user *)optval, optlen);
default:
return -ENOPROTOOPT;
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-31 21:37:28 +0000