aboutsummaryrefslogtreecommitdiffstats
path: root/net/dccp
diff options
context:
space:
mode:
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/Makefile4
-rw-r--r--net/dccp/ackvec.c33
-rw-r--r--net/dccp/ackvec.h12
-rw-r--r--net/dccp/ccid.h2
-rw-r--r--net/dccp/dccp.h24
-rw-r--r--net/dccp/diag.c2
-rw-r--r--net/dccp/input.c79
-rw-r--r--net/dccp/ipv4.c305
-rw-r--r--net/dccp/ipv6.c1261
-rw-r--r--net/dccp/ipv6.h37
-rw-r--r--net/dccp/minisocks.c23
-rw-r--r--net/dccp/output.c47
-rw-r--r--net/dccp/proto.c56
13 files changed, 1572 insertions, 313 deletions
diff --git a/net/dccp/Makefile b/net/dccp/Makefile
index 344a8da153fc..87b27fff6e3b 100644
--- a/net/dccp/Makefile
+++ b/net/dccp/Makefile
@@ -1,3 +1,7 @@
+obj-$(CONFIG_IPV6) += dccp_ipv6.o
+
+dccp_ipv6-y := ipv6.o
+
obj-$(CONFIG_IP_DCCP) += dccp.o
dccp-y := ccid.o input.o ipv4.o minisocks.o options.o output.o proto.o \
diff --git a/net/dccp/ackvec.c b/net/dccp/ackvec.c
index c9a62cca22fc..ce9cb77c5c29 100644
--- a/net/dccp/ackvec.c
+++ b/net/dccp/ackvec.c
@@ -55,8 +55,8 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
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);
+ if ((int)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;
@@ -93,8 +93,14 @@ int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb)
struct dccp_ackvec *dccp_ackvec_alloc(const unsigned int len,
const gfp_t priority)
{
- struct dccp_ackvec *av = kmalloc(sizeof(*av) + len, priority);
+ struct dccp_ackvec *av;
+ BUG_ON(len == 0);
+
+ if (len > DCCP_MAX_ACKVEC_LEN)
+ return NULL;
+
+ av = kmalloc(sizeof(*av) + len, priority);
if (av != NULL) {
av->dccpav_buf_len = len;
av->dccpav_buf_head =
@@ -117,13 +123,13 @@ void dccp_ackvec_free(struct dccp_ackvec *av)
}
static inline u8 dccp_ackvec_state(const struct dccp_ackvec *av,
- const unsigned int index)
+ const u8 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)
+ const u8 index)
{
return av->dccpav_buf[index] & DCCP_ACKVEC_LEN_MASK;
}
@@ -135,7 +141,7 @@ static inline u8 dccp_ackvec_len(const struct dccp_ackvec *av,
*/
static inline int dccp_ackvec_set_buf_head_state(struct dccp_ackvec *av,
const unsigned int packets,
- const unsigned char state)
+ const unsigned char state)
{
unsigned int gap;
signed long new_head;
@@ -223,7 +229,7 @@ int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
* could reduce the complexity of this scan.)
*/
u64 delta = dccp_delta_seqno(ackno, av->dccpav_buf_ackno);
- unsigned int index = av->dccpav_buf_head;
+ u8 index = av->dccpav_buf_head;
while (1) {
const u8 len = dccp_ackvec_len(av, index);
@@ -291,7 +297,7 @@ void dccp_ackvec_print(const struct dccp_ackvec *av)
}
#endif
-static void dccp_ackvec_trow_away_ack_record(struct dccp_ackvec *av)
+static void dccp_ackvec_throw_away_ack_record(struct dccp_ackvec *av)
{
/*
* As we're keeping track of the ack vector size (dccpav_vec_len) and
@@ -301,9 +307,10 @@ static void dccp_ackvec_trow_away_ack_record(struct dccp_ackvec *av)
* 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;
+ u32 new_buf_tail = av->dccpav_ack_ptr + 1;
+ if (new_buf_tail >= av->dccpav_vec_len)
+ new_buf_tail -= av->dccpav_vec_len;
+ av->dccpav_buf_tail = new_buf_tail;
#endif
av->dccpav_vec_len -= av->dccpav_sent_len;
}
@@ -326,7 +333,7 @@ void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av, struct sock *sk,
debug_prefix, 1,
(unsigned long long)av->dccpav_ack_seqno,
(unsigned long long)av->dccpav_ack_ackno);
- dccp_ackvec_trow_away_ack_record(av);
+ dccp_ackvec_throw_away_ack_record(av);
av->dccpav_ack_seqno = DCCP_MAX_SEQNO + 1;
}
}
@@ -389,7 +396,7 @@ static void dccp_ackvec_check_rcv_ackvector(struct dccp_ackvec *av,
av->dccpav_ack_seqno,
(unsigned long long)
av->dccpav_ack_ackno);
- dccp_ackvec_trow_away_ack_record(av);
+ dccp_ackvec_throw_away_ack_record(av);
}
/*
* If dccpav_ack_seqno was not received, no problem
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index d0fd6c60c574..f7dfb5f67b87 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -54,16 +54,16 @@
* @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_head;
+ u8 dccpav_buf_tail;
+ u8 dccpav_ack_ptr;
+ u8 dccpav_sent_len;
+ u8 dccpav_vec_len;
+ u8 dccpav_buf_len;
u8 dccpav_buf_nonce;
u8 dccpav_ack_nonce;
u8 dccpav_buf[0];
diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index c37eeeaf5c6e..de681c6ad081 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -21,6 +21,8 @@
#define CCID_MAX 255
+struct tcp_info;
+
struct ccid {
unsigned char ccid_id;
const char *ccid_name;
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index f97b85d55ad8..93f26dd6e6cb 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -59,7 +59,7 @@ extern void dccp_time_wait(struct sock *sk, int state, int timeo);
#define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */
-extern struct proto dccp_v4_prot;
+extern struct proto dccp_prot;
/* is seq1 < seq2 ? */
static inline int before48(const u64 seq1, const u64 seq2)
@@ -228,6 +228,9 @@ extern int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
const struct dccp_hdr *dh, const unsigned len);
+extern int dccp_v4_init_sock(struct sock *sk);
+extern int dccp_v4_destroy_sock(struct sock *sk);
+
extern void dccp_close(struct sock *sk, long timeout);
extern struct sk_buff *dccp_make_response(struct sock *sk,
struct dst_entry *dst,
@@ -238,6 +241,7 @@ extern struct sk_buff *dccp_make_reset(struct sock *sk,
extern int dccp_connect(struct sock *sk);
extern int dccp_disconnect(struct sock *sk, int flags);
+extern void dccp_unhash(struct sock *sk);
extern int dccp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
extern int dccp_setsockopt(struct sock *sk, int level, int optname,
@@ -249,6 +253,13 @@ extern int dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t len, int nonblock,
int flags, int *addr_len);
extern void dccp_shutdown(struct sock *sk, int how);
+extern int inet_dccp_listen(struct socket *sock, int backlog);
+extern unsigned int dccp_poll(struct file *file, struct socket *sock,
+ poll_table *wait);
+extern void dccp_v4_send_check(struct sock *sk, int len,
+ struct sk_buff *skb);
+extern int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
+ int addr_len);
extern int dccp_v4_checksum(const struct sk_buff *skb,
const u32 saddr, const u32 daddr);
@@ -256,6 +267,17 @@ extern int dccp_v4_checksum(const struct sk_buff *skb,
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);
+extern int dccp_invalid_packet(struct sk_buff *skb);
+
+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);
+}
struct dccp_skb_cb {
__u8 dccpd_type:4;
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index f675d8e642d3..3f78c00e3822 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -28,7 +28,7 @@ static void dccp_get_info(struct sock *sk, struct tcp_info *info)
info->tcpi_retransmits = icsk->icsk_retransmits;
info->tcpi_probes = icsk->icsk_probes_out;
info->tcpi_backoff = icsk->icsk_backoff;
- info->tcpi_pmtu = dp->dccps_pmtu_cookie;
+ info->tcpi_pmtu = icsk->icsk_pmtu_cookie;
if (dp->dccps_options.dccpo_send_ack_vector)
info->tcpi_options |= TCPI_OPT_SACK;
diff --git a/net/dccp/input.c b/net/dccp/input.c
index 3454d5941900..b6cba72b44e8 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -151,29 +151,12 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb)
return 0;
}
-int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
- const struct dccp_hdr *dh, const unsigned len)
+static inline int __dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+ const struct dccp_hdr *dh,
+ const unsigned len)
{
struct dccp_sock *dp = dccp_sk(sk);
- if (dccp_check_seqno(sk, skb))
- goto discard;
-
- if (dccp_parse_options(sk, skb))
- goto discard;
-
- if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
- dccp_event_ack_recv(sk, skb);
-
- 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);
-
switch (dccp_hdr(skb)->dccph_type) {
case DCCP_PKT_DATAACK:
case DCCP_PKT_DATA:
@@ -250,6 +233,37 @@ discard:
return 0;
}
+int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
+ const struct dccp_hdr *dh, const unsigned len)
+{
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ if (dccp_check_seqno(sk, skb))
+ goto discard;
+
+ if (dccp_parse_options(sk, skb))
+ goto discard;
+
+ if (DCCP_SKB_CB(skb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
+ dccp_event_ack_recv(sk, skb);
+
+ 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);
+
+ return __dccp_rcv_established(sk, skb, dh, len);
+discard:
+ __kfree_skb(skb);
+ return 0;
+}
+
+EXPORT_SYMBOL_GPL(dccp_rcv_established);
+
static int dccp_rcv_request_sent_state_process(struct sock *sk,
struct sk_buff *skb,
const struct dccp_hdr *dh,
@@ -286,6 +300,12 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
goto out_invalid_packet;
}
+ 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 out_invalid_packet; /* FIXME: change error code */
+
dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq;
dccp_update_gsr(sk, dp->dccps_isr);
/*
@@ -309,7 +329,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
goto out_invalid_packet;
}
- dccp_sync_mss(sk, dp->dccps_pmtu_cookie);
+ dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
/*
* Step 10: Process REQUEST state (second part)
@@ -329,7 +349,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
dccp_set_state(sk, DCCP_PARTOPEN);
/* Make sure socket is routed, for correct metrics. */
- inet_sk_rebuild_header(sk);
+ icsk->icsk_af_ops->rebuild_header(sk);
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
@@ -398,9 +418,9 @@ static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
if (dh->dccph_type == DCCP_PKT_DATAACK ||
dh->dccph_type == DCCP_PKT_DATA) {
- dccp_rcv_established(sk, skb, dh, len);
+ __dccp_rcv_established(sk, skb, dh, len);
queued = 1; /* packet was queued
- (by dccp_rcv_established) */
+ (by __dccp_rcv_established) */
}
break;
}
@@ -444,7 +464,8 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
*/
if (sk->sk_state == DCCP_LISTEN) {
if (dh->dccph_type == DCCP_PKT_REQUEST) {
- if (dccp_v4_conn_request(sk, skb) < 0)
+ if (inet_csk(sk)->icsk_af_ops->conn_request(sk,
+ skb) < 0)
return 1;
/* FIXME: do congestion control initialization */
@@ -471,14 +492,14 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
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);
-
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);
}
/*
@@ -566,3 +587,5 @@ discard:
}
return 0;
}
+
+EXPORT_SYMBOL_GPL(dccp_rcv_state_process);
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 656e13e38cfb..3f244670764a 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -19,7 +19,9 @@
#include <net/icmp.h>
#include <net/inet_hashtables.h>
+#include <net/inet_sock.h>
#include <net/sock.h>
+#include <net/timewait_sock.h>
#include <net/tcp_states.h>
#include <net/xfrm.h>
@@ -37,7 +39,8 @@ EXPORT_SYMBOL_GPL(dccp_hashinfo);
static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
{
- return inet_csk_get_port(&dccp_hashinfo, sk, snum);
+ return inet_csk_get_port(&dccp_hashinfo, sk, snum,
+ inet_csk_bind_conflict);
}
static void dccp_v4_hash(struct sock *sk)
@@ -45,171 +48,14 @@ static void dccp_v4_hash(struct sock *sk)
inet_hash(&dccp_hashinfo, sk);
}
-static void dccp_v4_unhash(struct sock *sk)
+void dccp_unhash(struct sock *sk)
{
inet_unhash(&dccp_hashinfo, sk);
}
-/* called with local bh disabled */
-static int __dccp_v4_check_established(struct sock *sk, const __u16 lport,
- struct inet_timewait_sock **twp)
-{
- struct inet_sock *inet = inet_sk(sk);
- const u32 daddr = inet->rcv_saddr;
- const u32 saddr = inet->daddr;
- const int dif = sk->sk_bound_dev_if;
- INET_ADDR_COOKIE(acookie, saddr, daddr)
- const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
- 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, 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, hash, acookie, saddr, daddr, ports, dif))
- goto not_unique;
- }
+EXPORT_SYMBOL_GPL(dccp_unhash);
- /* Must record num and sport now. Otherwise we will see
- * in hash table socket with a funny identity. */
- inet->num = lport;
- inet->sport = htons(lport);
- sk->sk_hash = hash;
- BUG_TRAP(sk_unhashed(sk));
- __sk_add_node(sk, &head->chain);
- sock_prot_inc_use(sk->sk_prot);
- write_unlock(&head->lock);
-
- if (twp != NULL) {
- *twp = tw;
- NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
- } else if (tw != NULL) {
- /* Silly. Should hash-dance instead... */
- inet_twsk_deschedule(tw, &dccp_death_row);
- NET_INC_STATS_BH(LINUX_MIB_TIMEWAITRECYCLED);
-
- inet_twsk_put(tw);
- }
-
- return 0;
-
-not_unique:
- write_unlock(&head->lock);
- return -EADDRNOTAVAIL;
-}
-
-/*
- * Bind a port for a connect operation and hash it.
- */
-static int dccp_v4_hash_connect(struct sock *sk)
-{
- const unsigned short snum = inet_sk(sk)->num;
- struct inet_bind_hashbucket *head;
- struct inet_bind_bucket *tb;
- int ret;
-
- if (snum == 0) {
- int low = sysctl_local_port_range[0];
- int high = sysctl_local_port_range[1];
- int remaining = (high - low) + 1;
- int rover = net_random() % (high - low) + low;
- struct hlist_node *node;
- struct inet_timewait_sock *tw = NULL;
-
- local_bh_disable();
- do {
- head = &dccp_hashinfo.bhash[inet_bhashfn(rover,
- dccp_hashinfo.bhash_size)];
- spin_lock(&head->lock);
-
- /* Does not bother with rcv_saddr checks,
- * because the established check is already
- * unique enough.
- */
- inet_bind_bucket_for_each(tb, node, &head->chain) {
- if (tb->port == rover) {
- BUG_TRAP(!hlist_empty(&tb->owners));
- if (tb->fastreuse >= 0)
- goto next_port;
- if (!__dccp_v4_check_established(sk,
- rover,
- &tw))
- goto ok;
- goto next_port;
- }
- }
-
- tb = inet_bind_bucket_create(dccp_hashinfo.bind_bucket_cachep,
- head, rover);
- if (tb == NULL) {
- spin_unlock(&head->lock);
- break;
- }
- tb->fastreuse = -1;
- goto ok;
-
- next_port:
- spin_unlock(&head->lock);
- if (++rover > high)
- rover = low;
- } while (--remaining > 0);
-
- local_bh_enable();
-
- return -EADDRNOTAVAIL;
-
-ok:
- /* All locks still held and bhs disabled */
- inet_bind_hash(sk, tb, rover);
- if (sk_unhashed(sk)) {
- inet_sk(sk)->sport = htons(rover);
- __inet_hash(&dccp_hashinfo, sk, 0);
- }
- spin_unlock(&head->lock);
-
- if (tw != NULL) {
- inet_twsk_deschedule(tw, &dccp_death_row);
- inet_twsk_put(tw);
- }
-
- ret = 0;
- goto out;
- }
-
- head = &dccp_hashinfo.bhash[inet_bhashfn(snum,
- dccp_hashinfo.bhash_size)];
- tb = inet_csk(sk)->icsk_bind_hash;
- spin_lock_bh(&head->lock);
- if (sk_head(&tb->owners) == sk && sk->sk_bind_node.next == NULL) {
- __inet_hash(&dccp_hashinfo, sk, 0);
- spin_unlock_bh(&head->lock);
- return 0;
- } else {
- spin_unlock(&head->lock);
- /* No definite answer... Walk to established hash table */
- ret = __dccp_v4_check_established(sk, snum, NULL);
-out:
- local_bh_enable();
- return ret;
- }
-}
-
-static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
- int addr_len)
+int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
struct inet_sock *inet = inet_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
@@ -259,9 +105,9 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
inet->dport = usin->sin_port;
inet->daddr = daddr;
- dp->dccps_ext_header_len = 0;
+ inet_csk(sk)->icsk_ext_hdr_len = 0;
if (inet->opt != NULL)
- dp->dccps_ext_header_len = inet->opt->optlen;
+ inet_csk(sk)->icsk_ext_hdr_len = inet->opt->optlen;
/*
* Socket identity is still unknown (sport may be zero).
* However we set state to DCCP_REQUESTING and not releasing socket
@@ -269,7 +115,7 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
* complete initialization after this.
*/
dccp_set_state(sk, DCCP_REQUESTING);
- err = dccp_v4_hash_connect(sk);
+ err = inet_hash_connect(&dccp_death_row, sk);
if (err != 0)
goto failure;
@@ -287,16 +133,6 @@ static int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
usin->sin_port);
dccp_update_gss(sk, dp->dccps_iss);
- /*
- * SWL and AWL are initially adjusted so that they are not less than
- * the initial Sequence Numbers received and sent, respectively:
- * SWL := max(GSR + 1 - floor(W/4), ISR),
- * AWL := max(GSS - W' + 1, ISS).
- * These adjustments MUST be applied only at the beginning of the
- * connection.
- */
- dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
-
inet->id = dp->dccps_iss ^ jiffies;
err = dccp_connect(sk);
@@ -316,6 +152,8 @@ failure:
goto out;
}
+EXPORT_SYMBOL_GPL(dccp_v4_connect);
+
/*
* This routine does path mtu discovery as defined in RFC1191.
*/
@@ -354,7 +192,7 @@ static inline void dccp_do_pmtu_discovery(struct sock *sk,
mtu = dst_mtu(dst);
if (inet->pmtudisc != IP_PMTUDISC_DONT &&
- dp->dccps_pmtu_cookie > mtu) {
+ inet_csk(sk)->icsk_pmtu_cookie > mtu) {
dccp_sync_mss(sk, mtu);
/*
@@ -606,6 +444,17 @@ out:
sock_put(sk);
}
+/* This routine computes an IPv4 DCCP checksum. */
+void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb)
+{
+ const struct inet_sock *inet = inet_sk(sk);
+ struct dccp_hdr *dh = dccp_hdr(skb);
+
+ dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr, inet->daddr);
+}
+
+EXPORT_SYMBOL_GPL(dccp_v4_send_check);
+
int dccp_v4_send_reset(struct sock *sk, enum dccp_reset_codes code)
{
struct sk_buff *skb;
@@ -641,16 +490,6 @@ 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;
@@ -662,7 +501,6 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
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 &
@@ -703,7 +541,6 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
ireq = inet_rsk(req);
ireq->loc_addr = daddr;
ireq->rmt_addr = saddr;
- /* FIXME: Merge Aristeu's option parsing code when ready */
req->rcv_wnd = 100; /* Fake, option parsing will get the
right value */
ireq->opt = NULL;
@@ -721,23 +558,22 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
dreq->dreq_iss = dccp_v4_init_sequence(sk, skb);
dreq->dreq_service = service;
- if (dccp_v4_send_response(sk, req, dst))
+ if (dccp_v4_send_response(sk, req, NULL))
goto drop_and_free;
inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
return 0;
drop_and_free:
- /*
- * FIXME: should be reqsk_free after implementing req->rsk_ops
- */
- __reqsk_free(req);
+ reqsk_free(req);
drop:
DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
dcb->dccpd_reset_code = reset_code;
return -1;
}
+EXPORT_SYMBOL_GPL(dccp_v4_conn_request);
+
/*
* The three way handshake has completed - we got a valid ACK or DATAACK -
* now create the new socket.
@@ -792,6 +628,8 @@ exit:
return NULL;
}
+EXPORT_SYMBOL_GPL(dccp_v4_request_recv_sock);
+
static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
{
const struct dccp_hdr *dh = dccp_hdr(skb);
@@ -1011,7 +849,9 @@ discard:
return 0;
}
-static inline int dccp_invalid_packet(struct sk_buff *skb)
+EXPORT_SYMBOL_GPL(dccp_v4_do_rcv);
+
+int dccp_invalid_packet(struct sk_buff *skb)
{
const struct dccp_hdr *dh;
@@ -1065,29 +905,30 @@ static inline int dccp_invalid_packet(struct sk_buff *skb)
return 1;
}
- /* If the header checksum is incorrect, drop packet and return */
- if (dccp_v4_verify_checksum(skb, skb->nh.iph->saddr,
- skb->nh.iph->daddr) < 0) {
- LIMIT_NETDEBUG(KERN_WARNING "DCCP: header checksum is "
- "incorrect\n");
- return 1;
- }
-
return 0;
}
+EXPORT_SYMBOL_GPL(dccp_invalid_packet);
+
/* this is called when real data arrives */
int dccp_v4_rcv(struct sk_buff *skb)
{
const struct dccp_hdr *dh;
struct sock *sk;
- int rc;
/* Step 1: Check header basics: */
if (dccp_invalid_packet(skb))
goto discard_it;
+ /* If the header checksum is incorrect, drop packet and return */
+ if (dccp_v4_verify_checksum(skb, skb->nh.iph->saddr,
+ skb->nh.iph->daddr) < 0) {
+ LIMIT_NETDEBUG(KERN_WARNING "%s: incorrect header checksum\n",
+ __FUNCTION__);
+ goto discard_it;
+ }
+
dh = dccp_hdr(skb);
DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
@@ -1143,28 +984,10 @@ int dccp_v4_rcv(struct sk_buff *skb)
goto do_time_wait;
}
- if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
- dccp_pr_debug("xfrm4_policy_check failed\n");
+ if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_and_relse;
- }
-
- if (sk_filter(sk, skb, 0)) {
- dccp_pr_debug("sk_filter failed\n");
- goto discard_and_relse;
- }
-
- skb->dev = NULL;
-
- bh_lock_sock(sk);
- rc = 0;
- if (!sock_owned_by_user(sk))
- rc = dccp_v4_do_rcv(sk, skb);
- else
- sk_add_backlog(sk, skb);
- bh_unlock_sock(sk);
- sock_put(sk);
- return rc;
+ return sk_receive_skb(sk, skb);
no_dccp_socket:
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))
@@ -1194,9 +1017,23 @@ do_time_wait:
goto no_dccp_socket;
}
-static int dccp_v4_init_sock(struct sock *sk)
+struct inet_connection_sock_af_ops dccp_ipv4_af_ops = {
+ .queue_xmit = ip_queue_xmit,
+ .send_check = dccp_v4_send_check,
+ .rebuild_header = inet_sk_rebuild_header,
+ .conn_request = dccp_v4_conn_request,
+ .syn_recv_sock = dccp_v4_request_recv_sock,
+ .net_header_len = sizeof(struct iphdr),
+ .setsockopt = ip_setsockopt,
+ .getsockopt = ip_getsockopt,
+ .addr2sockaddr = inet_csk_addr2sockaddr,
+ .sockaddr_len = sizeof(struct sockaddr_in),
+};
+
+int dccp_v4_init_sock(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
+ struct inet_connection_sock *icsk = inet_csk(sk);
static int dccp_ctl_socket_init = 1;
dccp_options_init(&dp->dccps_options);
@@ -1236,9 +1073,11 @@ static int dccp_v4_init_sock(struct sock *sk)
dccp_ctl_socket_init = 0;
dccp_init_xmit_timers(sk);
- inet_csk(sk)->icsk_rto = DCCP_TIMEOUT_INIT;
+ icsk->icsk_rto = DCCP_TIMEOUT_INIT;
sk->sk_state = DCCP_CLOSED;
sk->sk_write_space = dccp_write_space;
+ icsk->icsk_af_ops = &dccp_ipv4_af_ops;
+ icsk->icsk_sync_mss = dccp_sync_mss;
dp->dccps_mss_cache = 536;
dp->dccps_role = DCCP_ROLE_UNDEFINED;
dp->dccps_service = DCCP_SERVICE_INVALID_VALUE;
@@ -1246,7 +1085,9 @@ static int dccp_v4_init_sock(struct sock *sk)
return 0;
}
-static int dccp_v4_destroy_sock(struct sock *sk)
+EXPORT_SYMBOL_GPL(dccp_v4_init_sock);
+
+int dccp_v4_destroy_sock(struct sock *sk)
{
struct dccp_sock *dp = dccp_sk(sk);
@@ -1279,6 +1120,8 @@ static int dccp_v4_destroy_sock(struct sock *sk)
return 0;
}
+EXPORT_SYMBOL_GPL(dccp_v4_destroy_sock);
+
static void dccp_v4_reqsk_destructor(struct request_sock *req)
{
kfree(inet_rsk(req)->opt);
@@ -1293,7 +1136,11 @@ static struct request_sock_ops dccp_request_sock_ops = {
.send_reset = dccp_v4_ctl_send_reset,
};
-struct proto dccp_v4_prot = {
+static struct timewait_sock_ops dccp_timewait_sock_ops = {
+ .twsk_obj_size = sizeof(struct inet_timewait_sock),
+};
+
+struct proto dccp_prot = {
.name = "DCCP",
.owner = THIS_MODULE,
.close = dccp_close,
@@ -1307,7 +1154,7 @@ struct proto dccp_v4_prot = {
.recvmsg = dccp_recvmsg,
.backlog_rcv = dccp_v4_do_rcv,
.hash = dccp_v4_hash,
- .unhash = dccp_v4_unhash,
+ .unhash = dccp_unhash,
.accept = inet_csk_accept,
.get_port = dccp_v4_get_port,
.shutdown = dccp_shutdown,
@@ -1316,5 +1163,7 @@ struct proto dccp_v4_prot = {
.max_header = MAX_DCCP_HEADER,
.obj_size = sizeof(struct dccp_sock),
.rsk_prot = &dccp_request_sock_ops,
- .twsk_obj_size = sizeof(struct inet_timewait_sock),
+ .twsk_prot = &dccp_timewait_sock_ops,
};
+
+EXPORT_SYMBOL_GPL(dccp_prot);
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
new file mode 100644
index 000000000000..c609dc78f487
--- /dev/null
+++ b/net/dccp/ipv6.c
@@ -0,0 +1,1261 @@
+/*
+ * DCCP over IPv6
+ * Linux INET6 implementation
+ *
+ * Based on net/dccp6/ipv6.c
+ *
+ * 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/xfrm.h>
+
+#include <net/addrconf.h>
+#include <net/inet_common.h>
+#include <net/inet_hashtables.h>
+#include <net/inet_sock.h>
+#include <net/inet6_connection_sock.h>
+#include <net/inet6_hashtables.h>
+#include <net/ip6_route.h>
+#include <net/ipv6.h>
+#include <net/protocol.h>
+#include <net/transp_v6.h>
+#include <net/xfrm.h>
+
+#include "dccp.h"
+#include "ipv6.h"
+
+static void dccp_v6_ctl_send_reset(struct sk_buff *skb);
+static void dccp_v6_reqsk_send_ack(struct sk_buff *skb,
+ struct request_sock *req);
+static void dccp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb);
+
+static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb);
+
+static struct inet_connection_sock_af_ops dccp_ipv6_mapped;
+static struct inet_connection_sock_af_ops dccp_ipv6_af_ops;
+
+static int dccp_v6_get_port(struct sock *sk, unsigned short snum)
+{
+ return inet_csk_get_port(&dccp_hashinfo, sk, snum,
+ inet6_csk_bind_conflict);
+}
+
+static void dccp_v6_hash(struct sock *sk)
+{
+ if (sk->sk_state != DCCP_CLOSED) {
+ if (inet_csk(sk)->icsk_af_ops == &dccp_ipv6_mapped) {
+ dccp_prot.hash(sk);
+ return;
+ }
+ local_bh_disable();
+ __inet6_hash(&dccp_hashinfo, sk);
+ local_bh_enable();
+ }
+}
+
+static inline u16 dccp_v6_check(struct dccp_hdr *dh, int len,
+ struct in6_addr *saddr,
+ struct in6_addr *daddr,
+ unsigned long base)
+{
+ return csum_ipv6_magic(saddr, daddr, len, IPPROTO_DCCP, base);
+}
+
+static __u32 dccp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
+{
+ const struct dccp_hdr *dh = dccp_hdr(skb);
+
+ if (skb->protocol == htons(ETH_P_IPV6))
+ return secure_tcpv6_sequence_number(skb->nh.ipv6h->daddr.s6_addr32,
+ skb->nh.ipv6h->saddr.s6_addr32,
+ dh->dccph_dport,
+ dh->dccph_sport);
+ else
+ return secure_dccp_sequence_number(skb->nh.iph->daddr,
+ skb->nh.iph->saddr,
+ dh->dccph_dport,
+ dh->dccph_sport);
+}
+
+static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
+ int addr_len)
+{
+ struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
+ struct inet_connection_sock *icsk = inet_csk(sk);
+ struct inet_sock *inet = inet_sk(sk);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct in6_addr *saddr = NULL, *final_p = NULL, final;
+ struct flowi fl;
+ struct dst_entry *dst;
+ int addr_type;
+ int err;
+
+ dp->dccps_role = DCCP_ROLE_CLIENT;
+
+ if (addr_len < SIN6_LEN_RFC2133)
+ return -EINVAL;
+
+ if (usin->sin6_family != AF_INET6)
+ return -EAFNOSUPPORT;
+
+ memset(&fl, 0, sizeof(fl));
+
+ if (np->sndflow) {
+ fl.fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK;
+ IP6_ECN_flow_init(fl.fl6_flowlabel);
+ if (fl.fl6_flowlabel & IPV6_FLOWLABEL_MASK) {
+ struct ip6_flowlabel *flowlabel;
+ flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel);
+ if (flowlabel == NULL)
+ return -EINVAL;
+ ipv6_addr_copy(&usin->sin6_addr, &flowlabel->dst);
+ fl6_sock_release(flowlabel);
+ }
+ }
+
+ /*
+ * connect() to INADDR_ANY means loopback (BSD'ism).
+ */
+
+ if (ipv6_addr_any(&usin->sin6_addr))
+ usin->sin6_addr.s6_addr[15] = 0x1;
+
+ addr_type = ipv6_addr_type(&usin->sin6_addr);
+
+ if(addr_type & IPV6_ADDR_MULTICAST)
+ return -ENETUNREACH;
+
+ if (addr_type & IPV6_ADDR_LINKLOCAL) {
+ if (addr_len >= sizeof(struct sockaddr_in6) &&
+ usin->sin6_scope_id) {
+ /* If interface is set while binding, indices
+ * must coincide.
+ */
+ if (sk->sk_bound_dev_if &&
+ sk->sk_bound_dev_if != usin->sin6_scope_id)
+ return -EINVAL;
+
+ sk->sk_bound_dev_if = usin->sin6_scope_id;
+ }
+
+ /* Connect to link-local address requires an interface */
+ if (!sk->sk_bound_dev_if)
+ return -EINVAL;
+ }
+
+ ipv6_addr_copy(&np->daddr, &usin->sin6_addr);
+ np->flow_label = fl.fl6_flowlabel;
+
+ /*
+ * DCCP over IPv4
+ */
+
+ if (addr_type == IPV6_ADDR_MAPPED) {
+ u32 exthdrlen = icsk->icsk_ext_hdr_len;
+ struct sockaddr_in sin;
+
+ SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
+
+ if (__ipv6_only_sock(sk))
+ return -ENETUNREACH;
+
+ sin.sin_family = AF_INET;
+ sin.sin_port = usin->sin6_port;
+ sin.sin_addr.s_addr = usin->sin6_addr.s6_addr32[3];
+
+ icsk->icsk_af_ops = &dccp_ipv6_mapped;
+ sk->sk_backlog_rcv = dccp_v4_do_rcv;
+
+ err = dccp_v4_connect(sk, (struct sockaddr *)&sin, sizeof(sin));
+
+ if (err) {
+ icsk->icsk_ext_hdr_len = exthdrlen;
+ icsk->icsk_af_ops = &dccp_ipv6_af_ops;
+ sk->sk_backlog_rcv = dccp_v6_do_rcv;
+ goto failure;
+ } else {
+ ipv6_addr_set(&np->saddr, 0, 0, htonl(0x0000FFFF),
+ inet->saddr);
+ ipv6_addr_set(&np->rcv_saddr, 0, 0, htonl(0x0000FFFF),
+ inet->rcv_saddr);
+ }
+
+ return err;
+ }
+
+ if (!ipv6_addr_any(&np->rcv_saddr))
+ saddr = &np->rcv_saddr;
+
+ fl.proto = IPPROTO_DCCP;
+ ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
+ ipv6_addr_copy(&fl.fl6_src, saddr ? saddr : &np->saddr);
+ fl.oif = sk->sk_bound_dev_if;
+ fl.fl_ip_dport = usin->sin6_port;
+ fl.fl_ip_sport = inet->sport;
+
+ if (np->opt && np->opt->srcrt) {
+ struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
+ ipv6_addr_copy(&final, &fl.fl6_dst);
+ ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+ final_p = &final;
+ }
+
+ err = ip6_dst_lookup(sk, &dst, &fl);
+ if (err)
+ goto failure;
+ if (final_p)
+ ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+ if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+ goto failure;
+
+ if (saddr == NULL) {
+ saddr = &fl.fl6_src;
+ ipv6_addr_copy(&np->rcv_saddr, saddr);
+ }
+
+ /* set the source address */
+ ipv6_addr_copy(&np->saddr, saddr);
+ inet->rcv_saddr = LOOPBACK4_IPV6;
+
+ ip6_dst_store(sk, dst, NULL);
+
+ icsk->icsk_ext_hdr_len = 0;
+ if (np->opt)
+ icsk->icsk_ext_hdr_len = (np->opt->opt_flen +
+ np->opt->opt_nflen);
+
+ inet->dport = usin->sin6_port;
+
+ dccp_set_state(sk, DCCP_REQUESTING);
+ err = inet6_hash_connect(&dccp_death_row, sk);
+ if (err)
+ goto late_failure;
+ /* FIXME */
+#if 0
+ dp->dccps_gar = secure_dccp_v6_sequence_number(np->saddr.s6_addr32,
+ np->daddr.s6_addr32,
+ inet->sport,
+ inet->dport);
+#endif
+ err = dccp_connect(sk);
+ if (err)
+ goto late_failure;
+
+ return 0;
+
+late_failure:
+ dccp_set_state(sk, DCCP_CLOSED);
+ __sk_dst_reset(sk);
+failure:
+ inet->dport = 0;
+ sk->sk_route_caps = 0;
+ return err;
+}
+
+static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ int type, int code, int offset, __u32 info)
+{
+ struct ipv6hdr *hdr = (struct ipv6hdr *)skb->data;
+ const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);
+ struct ipv6_pinfo *np;
+ struct sock *sk;
+ int err;
+ __u64 seq;
+
+ sk = inet6_lookup(&dccp_hashinfo, &hdr->daddr, dh->dccph_dport,
+ &hdr->saddr, dh->dccph_sport, skb->dev->ifindex);
+
+ if (sk == NULL) {
+ ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
+ return;
+ }
+
+ if (sk->sk_state == DCCP_TIME_WAIT) {
+ inet_twsk_put((struct inet_timewait_sock *)sk);
+ return;
+ }
+
+ bh_lock_sock(sk);
+ if (sock_owned_by_user(sk))
+ NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS);
+
+ if (sk->sk_state == DCCP_CLOSED)
+ goto out;
+
+ np = inet6_sk(sk);
+
+ if (type == ICMPV6_PKT_TOOBIG) {
+ struct dst_entry *dst = NULL;
+
+ if (sock_owned_by_user(sk))
+ goto out;
+ if ((1 << sk->sk_state) & (DCCPF_LISTEN | DCCPF_CLOSED))
+ goto out;
+
+ /* icmp should have updated the destination cache entry */
+ dst = __sk_dst_check(sk, np->dst_cookie);
+
+ if (dst == NULL) {
+ struct inet_sock *inet = inet_sk(sk);
+ struct flowi fl;
+
+ /* BUGGG_FUTURE: Again, it is not clear how
+ to handle rthdr case. Ignore this complexity
+ for now.
+ */
+ memset(&fl, 0, sizeof(fl));
+ fl.proto = IPPROTO_DCCP;
+ ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
+ ipv6_addr_copy(&fl.fl6_src, &np->saddr);
+ fl.oif = sk->sk_bound_dev_if;
+ fl.fl_ip_dport = inet->dport;
+ fl.fl_ip_sport = inet->sport;
+
+ if ((err = ip6_dst_lookup(sk, &dst, &fl))) {
+ sk->sk_err_soft = -err;
+ goto out;
+ }
+
+ if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
+ sk->sk_err_soft = -err;
+ goto out;
+ }
+
+ } else
+ dst_hold(dst);
+
+ if (inet_csk(sk)->icsk_pmtu_cookie > dst_mtu(dst)) {
+ dccp_sync_mss(sk, dst_mtu(dst));
+ } /* else let the usual retransmit timer handle it */
+ dst_release(dst);
+ goto out;
+ }
+
+ icmpv6_err_convert(type, code, &err);
+
+ seq = DCCP_SKB_CB(skb)->dccpd_seq;
+ /* Might be for an request_sock */
+ switch (sk->sk_state) {
+ struct request_sock *req, **prev;
+ case DCCP_LISTEN:
+ if (sock_owned_by_user(sk))
+ goto out;
+
+ req = inet6_csk_search_req(sk, &prev, dh->dccph_dport,
+ &hdr->daddr, &hdr->saddr,
+ inet6_iif(skb));
+ if (!req)
+ goto out;
+
+ /* ICMPs are not backlogged, hence we cannot get
+ * an established socket here.
+ */
+ BUG_TRAP(req->sk == NULL);
+
+ if (seq != dccp_rsk(req)->dreq_iss) {
+ NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+ goto out;
+ }
+
+ inet_csk_reqsk_queue_drop(sk, req, prev);
+ goto out;
+
+ case DCCP_REQUESTING:
+ case DCCP_RESPOND: /* Cannot happen.
+ It can, it SYNs are crossed. --ANK */
+ if (!sock_owned_by_user(sk)) {
+ DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+ sk->sk_err = err;
+ /*
+ * Wake people up to see the error
+ * (see connect in sock.c)
+ */
+ sk->sk_error_report(sk);
+
+ dccp_done(sk);
+ } else
+ sk->sk_err_soft = err;
+ goto out;
+ }
+
+ if (!sock_owned_by_user(sk) && np->recverr) {
+ sk->sk_err = err;
+ sk->sk_error_report(sk);
+ } else
+ sk->sk_err_soft = err;
+
+out:
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
+
+
+static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
+ struct dst_entry *dst)
+{
+ struct inet6_request_sock *ireq6 = inet6_rsk(req);
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct sk_buff *skb;
+ struct ipv6_txoptions *opt = NULL;
+ struct in6_addr *final_p = NULL, final;
+ struct flowi fl;
+ int err = -1;
+
+ memset(&fl, 0, sizeof(fl));
+ fl.proto = IPPROTO_DCCP;
+ ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
+ ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
+ fl.fl6_flowlabel = 0;
+ fl.oif = ireq6->iif;
+ fl.fl_ip_dport = inet_rsk(req)->rmt_port;
+ fl.fl_ip_sport = inet_sk(sk)->sport;
+
+ if (dst == NULL) {
+ opt = np->opt;
+ if (opt == NULL &&
+ np->rxopt.bits.osrcrt == 2 &&
+ ireq6->pktopts) {
+ struct sk_buff *pktopts = ireq6->pktopts;
+ struct inet6_skb_parm *rxopt = IP6CB(pktopts);
+ if (rxopt->srcrt)
+ opt = ipv6_invert_rthdr(sk,
+ (struct ipv6_rt_hdr *)(pktopts->nh.raw +
+ rxopt->srcrt));
+ }
+
+ if (opt && opt->srcrt) {
+ struct rt0_hdr *rt0 = (struct rt0_hdr *)opt->srcrt;
+ ipv6_addr_copy(&final, &fl.fl6_dst);
+ ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+ final_p = &final;
+ }
+
+ err = ip6_dst_lookup(sk, &dst, &fl);
+ if (err)
+ goto done;
+ if (final_p)
+ ipv6_addr_copy(&fl.fl6_dst, final_p);
+ if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+ goto done;
+ }
+
+ skb = dccp_make_response(sk, dst, req);
+ if (skb != NULL) {
+ struct dccp_hdr *dh = dccp_hdr(skb);
+ dh->dccph_checksum = dccp_v6_check(dh, skb->len,
+ &ireq6->loc_addr,
+ &ireq6->rmt_addr,
+ csum_partial((char *)dh,
+ skb->len,
+ skb->csum));
+ ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
+ err = ip6_xmit(sk, skb, &fl, opt, 0);
+ if (err == NET_XMIT_CN)
+ err = 0;
+ }
+
+done:
+ if (opt && opt != np->opt)
+ sock_kfree_s(sk, opt, opt->tot_len);
+ return err;
+}
+
+static void dccp_v6_reqsk_destructor(struct request_sock *req)
+{
+ if (inet6_rsk(req)->pktopts != NULL)
+ kfree_skb(inet6_rsk(req)->pktopts);
+}
+
+static struct request_sock_ops dccp6_request_sock_ops = {
+ .family = AF_INET6,
+ .obj_size = sizeof(struct dccp6_request_sock),
+ .rtx_syn_ack = dccp_v6_send_response,
+ .send_ack = dccp_v6_reqsk_send_ack,
+ .destructor = dccp_v6_reqsk_destructor,
+ .send_reset = dccp_v6_ctl_send_reset,
+};
+
+static struct timewait_sock_ops dccp6_timewait_sock_ops = {
+ .twsk_obj_size = sizeof(struct dccp6_timewait_sock),
+};
+
+static void dccp_v6_send_check(struct sock *sk, int len, struct sk_buff *skb)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct dccp_hdr *dh = dccp_hdr(skb);
+
+ dh->dccph_checksum = csum_ipv6_magic(&np->saddr, &np->daddr,
+ len, IPPROTO_DCCP,
+ csum_partial((char *)dh,
+ dh->dccph_doff << 2,
+ skb->csum));
+}
+
+static void dccp_v6_ctl_send_reset(struct sk_buff *rxskb)
+{
+ struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
+ const int dccp_hdr_reset_len = sizeof(struct dccp_hdr) +
+ sizeof(struct dccp_hdr_ext) +
+ sizeof(struct dccp_hdr_reset);
+ struct sk_buff *skb;
+ struct flowi fl;
+ u64 seqno;
+
+ if (rxdh->dccph_type == DCCP_PKT_RESET)
+ return;
+
+ if (!ipv6_unicast_destination(rxskb))
+ return;
+
+ /*
+ * We need to grab some memory, and put together an RST,
+ * and then put it into the queue to be sent.
+ */
+
+ skb = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) +
+ dccp_hdr_reset_len, GFP_ATOMIC);
+ if (skb == NULL)
+ return;
+
+ skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr) +
+ dccp_hdr_reset_len);
+
+ skb->h.raw = skb_push(skb, dccp_hdr_reset_len);
+ dh = dccp_hdr(skb);
+ memset(dh, 0, dccp_hdr_reset_len);
+
+ /* Swap the send and the receive. */
+ dh->dccph_type = DCCP_PKT_RESET;
+ dh->dccph_sport = rxdh->dccph_dport;
+ dh->dccph_dport = rxdh->dccph_sport;
+ dh->dccph_doff = dccp_hdr_reset_len / 4;
+ dh->dccph_x = 1;
+ dccp_hdr_reset(skb)->dccph_reset_code =
+ DCCP_SKB_CB(rxskb)->dccpd_reset_code;
+
+ /* See "8.3.1. Abnormal Termination" in draft-ietf-dccp-spec-11 */
+ seqno = 0;
+ if (DCCP_SKB_CB(rxskb)->dccpd_ack_seq != DCCP_PKT_WITHOUT_ACK_SEQ)
+ dccp_set_seqno(&seqno, DCCP_SKB_CB(rxskb)->dccpd_ack_seq + 1);
+
+ dccp_hdr_set_seq(dh, seqno);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+ DCCP_SKB_CB(rxskb)->dccpd_seq);
+
+ memset(&fl, 0, sizeof(fl));
+ ipv6_addr_copy(&fl.fl6_dst, &rxskb->nh.ipv6h->saddr);
+ ipv6_addr_copy(&fl.fl6_src, &rxskb->nh.ipv6h->daddr);
+ dh->dccph_checksum = csum_ipv6_magic(&fl.fl6_src, &fl.fl6_dst,
+ sizeof(*dh), IPPROTO_DCCP,
+ skb->csum);
+ fl.proto = IPPROTO_DCCP;
+ fl.oif = inet6_iif(rxskb);
+ fl.fl_ip_dport = dh->dccph_dport;
+ fl.fl_ip_sport = dh->dccph_sport;
+
+ /* sk = NULL, but it is safe for now. RST socket required. */
+ if (!ip6_dst_lookup(NULL, &skb->dst, &fl)) {
+ if (xfrm_lookup(&skb->dst, &fl, NULL, 0) >= 0) {
+ ip6_xmit(NULL, skb, &fl, NULL, 0);
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS);
+ return;
+ }
+ }
+
+ kfree_skb(skb);
+}
+
+static void dccp_v6_ctl_send_ack(struct sk_buff *rxskb)
+{
+ struct flowi fl;
+ struct dccp_hdr *rxdh = dccp_hdr(rxskb), *dh;
+ const int dccp_hdr_ack_len = sizeof(struct dccp_hdr) +
+ sizeof(struct dccp_hdr_ext) +
+ sizeof(struct dccp_hdr_ack_bits);
+ struct sk_buff *skb;
+
+ skb = alloc_skb(MAX_HEADER + sizeof(struct ipv6hdr) +
+ dccp_hdr_ack_len, GFP_ATOMIC);
+ if (skb == NULL)
+ return;
+
+ skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr) +
+ dccp_hdr_ack_len);
+
+ skb->h.raw = skb_push(skb, dccp_hdr_ack_len);
+ dh = dccp_hdr(skb);
+ memset(dh, 0, dccp_hdr_ack_len);
+
+ /* Build DCCP header and checksum it. */
+ dh->dccph_type = DCCP_PKT_ACK;
+ dh->dccph_sport = rxdh->dccph_dport;
+ dh->dccph_dport = rxdh->dccph_sport;
+ dh->dccph_doff = dccp_hdr_ack_len / 4;
+ dh->dccph_x = 1;
+
+ dccp_hdr_set_seq(dh, DCCP_SKB_CB(rxskb)->dccpd_ack_seq);
+ dccp_hdr_set_ack(dccp_hdr_ack_bits(skb),
+ DCCP_SKB_CB(rxskb)->dccpd_seq);
+
+ memset(&fl, 0, sizeof(fl));
+ ipv6_addr_copy(&fl.fl6_dst, &rxskb->nh.ipv6h->saddr);
+ ipv6_addr_copy(&fl.fl6_src, &rxskb->nh.ipv6h->daddr);
+
+ /* FIXME: calculate checksum, IPv4 also should... */
+
+ fl.proto = IPPROTO_DCCP;
+ fl.oif = inet6_iif(rxskb);
+ fl.fl_ip_dport = dh->dccph_dport;
+ fl.fl_ip_sport = dh->dccph_sport;
+
+ if (!ip6_dst_lookup(NULL, &skb->dst, &fl)) {
+ if (xfrm_lookup(&skb->dst, &fl, NULL, 0) >= 0) {
+ ip6_xmit(NULL, skb, &fl, NULL, 0);
+ DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
+ return;
+ }
+ }
+
+ kfree_skb(skb);
+}
+
+static void dccp_v6_reqsk_send_ack(struct sk_buff *skb,
+ struct request_sock *req)
+{
+ dccp_v6_ctl_send_ack(skb);
+}
+
+static struct sock *dccp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
+{
+ const struct dccp_hdr *dh = dccp_hdr(skb);
+ const struct ipv6hdr *iph = skb->nh.ipv6h;
+ struct sock *nsk;
+ struct request_sock **prev;
+ /* Find possible connection requests. */
+ struct request_sock *req = inet6_csk_search_req(sk, &prev,
+ dh->dccph_sport,
+ &iph->saddr,
+ &iph->daddr,
+ inet6_iif(skb));
+ if (req != NULL)
+ return dccp_check_req(sk, skb, req, prev);
+
+ nsk = __inet6_lookup_established(&dccp_hashinfo,
+ &iph->saddr, dh->dccph_sport,
+ &iph->daddr, ntohs(dh->dccph_dport),
+ inet6_iif(skb));
+
+ if (nsk != NULL) {
+ if (nsk->sk_state != DCCP_TIME_WAIT) {
+ bh_lock_sock(nsk);
+ return nsk;
+ }
+ inet_twsk_put((struct inet_timewait_sock *)nsk);
+ return NULL;
+ }
+
+ return sk;
+}
+
+static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
+{
+ struct inet_request_sock *ireq;
+ struct dccp_sock dp;
+ struct request_sock *req;
+ struct dccp_request_sock *dreq;
+ struct inet6_request_sock *ireq6;
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ 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;
+
+ if (skb->protocol == htons(ETH_P_IP))
+ return dccp_v4_conn_request(sk, skb);
+
+ if (!ipv6_unicast_destination(skb))
+ goto drop;
+
+ if (dccp_bad_service_code(sk, service)) {
+ reset_code = DCCP_RESET_CODE_BAD_SERVICE_CODE;
+ goto drop;
+ }
+ /*
+ * There are no SYN attacks on IPv6, yet...
+ */
+ if (inet_csk_reqsk_queue_is_full(sk))
+ goto drop;
+
+ if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
+ goto drop;
+
+ req = inet6_reqsk_alloc(sk->sk_prot->rsk_prot);
+ if (req == NULL)
+ goto drop;
+
+ /* FIXME: process options */
+
+ dccp_openreq_init(req, &dp, skb);
+
+ ireq6 = inet6_rsk(req);
+ ireq = inet_rsk(req);
+ ipv6_addr_copy(&ireq6->rmt_addr, &skb->nh.ipv6h->saddr);
+ ipv6_addr_copy(&ireq6->loc_addr, &skb->nh.ipv6h->daddr);
+ req->rcv_wnd = 100; /* Fake, option parsing will get the
+ right value */
+ ireq6->pktopts = NULL;
+
+ if (ipv6_opt_accepted(sk, skb) ||
+ np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo ||
+ np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) {
+ atomic_inc(&skb->users);
+ ireq6->pktopts = skb;
+ }
+ ireq6->iif = sk->sk_bound_dev_if;
+
+ /* So that link locals have meaning */
+ if (!sk->sk_bound_dev_if &&
+ ipv6_addr_type(&ireq6->rmt_addr) & IPV6_ADDR_LINKLOCAL)
+ ireq6->iif = inet6_iif(skb);
+
+ /*
+ * Step 3: Process LISTEN state
+ *
+ * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
+ *
+ * In fact we defer setting S.GSR, S.SWL, S.SWH to
+ * dccp_create_openreq_child.
+ */
+ dreq = dccp_rsk(req);
+ dreq->dreq_isr = dcb->dccpd_seq;
+ dreq->dreq_iss = dccp_v6_init_sequence(sk, skb);
+ dreq->dreq_service = service;
+
+ if (dccp_v6_send_response(sk, req, NULL))
+ goto drop_and_free;
+
+ inet6_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
+ return 0;
+
+drop_and_free:
+ reqsk_free(req);
+drop:
+ DCCP_INC_STATS_BH(DCCP_MIB_ATTEMPTFAILS);
+ dcb->dccpd_reset_code = reset_code;
+ return -1;
+}
+
+static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
+ struct sk_buff *skb,
+ struct request_sock *req,
+ struct dst_entry *dst)
+{
+ struct inet6_request_sock *ireq6 = inet6_rsk(req);
+ struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
+ struct inet_sock *newinet;
+ struct dccp_sock *newdp;
+ struct dccp6_sock *newdp6;
+ struct sock *newsk;
+ struct ipv6_txoptions *opt;
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ /*
+ * v6 mapped
+ */
+
+ newsk = dccp_v4_request_recv_sock(sk, skb, req, dst);
+ if (newsk == NULL)
+ return NULL;
+
+ newdp6 = (struct dccp6_sock *)newsk;
+ newdp = dccp_sk(newsk);
+ newinet = inet_sk(newsk);
+ newinet->pinet6 = &newdp6->inet6;
+ newnp = inet6_sk(newsk);
+
+ memcpy(newnp, np, sizeof(struct ipv6_pinfo));
+
+ ipv6_addr_set(&newnp->daddr, 0, 0, htonl(0x0000FFFF),
+ newinet->daddr);
+
+ ipv6_addr_set(&newnp->saddr, 0, 0, htonl(0x0000FFFF),
+ newinet->saddr);
+
+ ipv6_addr_copy(&newnp->rcv_saddr, &newnp->saddr);
+
+ inet_csk(newsk)->icsk_af_ops = &dccp_ipv6_mapped;
+ newsk->sk_backlog_rcv = dccp_v4_do_rcv;
+ newnp->pktoptions = NULL;
+ newnp->opt = NULL;
+ newnp->mcast_oif = inet6_iif(skb);
+ newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
+
+ /*
+ * No need to charge this sock to the relevant IPv6 refcnt debug socks count
+ * here, dccp_create_openreq_child now does this for us, see the comment in
+ * that function for the gory details. -acme
+ */
+
+ /* It is tricky place. Until this moment IPv4 tcp
+ worked with IPv6 icsk.icsk_af_ops.
+ Sync it now.
+ */
+ dccp_sync_mss(newsk, inet_csk(newsk)->icsk_pmtu_cookie);
+
+ return newsk;
+ }
+
+ opt = np->opt;
+
+ if (sk_acceptq_is_full(sk))
+ goto out_overflow;
+
+ if (np->rxopt.bits.osrcrt == 2 &&
+ opt == NULL && ireq6->pktopts) {
+ struct inet6_skb_parm *rxopt = IP6CB(ireq6->pktopts);
+ if (rxopt->srcrt)
+ opt = ipv6_invert_rthdr(sk,
+ (struct ipv6_rt_hdr *)(ireq6->pktopts->nh.raw +
+ rxopt->srcrt));
+ }
+
+ if (dst == NULL) {
+ struct in6_addr *final_p = NULL, final;
+ struct flowi fl;
+
+ memset(&fl, 0, sizeof(fl));
+ fl.proto = IPPROTO_DCCP;
+ ipv6_addr_copy(&fl.fl6_dst, &ireq6->rmt_addr);
+ if (opt && opt->srcrt) {
+ struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt;
+ ipv6_addr_copy(&final, &fl.fl6_dst);
+ ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
+ final_p = &final;
+ }
+ ipv6_addr_copy(&fl.fl6_src, &ireq6->loc_addr);
+ fl.oif = sk->sk_bound_dev_if;
+ fl.fl_ip_dport = inet_rsk(req)->rmt_port;
+ fl.fl_ip_sport = inet_sk(sk)->sport;
+
+ if (ip6_dst_lookup(sk, &dst, &fl))
+ goto out;
+
+ if (final_p)
+ ipv6_addr_copy(&fl.fl6_dst, final_p);
+
+ if ((xfrm_lookup(&dst, &fl, sk, 0)) < 0)
+ goto out;
+ }
+
+ newsk = dccp_create_openreq_child(sk, req, skb);
+ if (newsk == NULL)
+ goto out;
+
+ /*
+ * No need to charge this sock to the relevant IPv6 refcnt debug socks
+ * count here, dccp_create_openreq_child now does this for us, see the
+ * comment in that function for the gory details. -acme
+ */
+
+ ip6_dst_store(newsk, dst, NULL);
+ newsk->sk_route_caps = dst->dev->features &
+ ~(NETIF_F_IP_CSUM | NETIF_F_TSO);
+
+ newdp6 = (struct dccp6_sock *)newsk;
+ newinet = inet_sk(newsk);
+ newinet->pinet6 = &newdp6->inet6;
+ newdp = dccp_sk(newsk);
+ newnp = inet6_sk(newsk);
+
+ memcpy(newnp, np, sizeof(struct ipv6_pinfo));
+
+ ipv6_addr_copy(&newnp->daddr, &ireq6->rmt_addr);
+ ipv6_addr_copy(&newnp->saddr, &ireq6->loc_addr);
+ ipv6_addr_copy(&newnp->rcv_saddr, &ireq6->loc_addr);
+ newsk->sk_bound_dev_if = ireq6->iif;
+
+ /* Now IPv6 options...
+
+ First: no IPv4 options.
+ */
+ newinet->opt = NULL;
+
+ /* Clone RX bits */
+ newnp->rxopt.all = np->rxopt.all;
+
+ /* Clone pktoptions received with SYN */
+ newnp->pktoptions = NULL;
+ if (ireq6->pktopts != NULL) {
+ newnp->pktoptions = skb_clone(ireq6->pktopts, GFP_ATOMIC);
+ kfree_skb(ireq6->pktopts);
+ ireq6->pktopts = NULL;
+ if (newnp->pktoptions)
+ skb_set_owner_r(newnp->pktoptions, newsk);
+ }
+ newnp->opt = NULL;
+ newnp->mcast_oif = inet6_iif(skb);
+ newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
+
+ /* Clone native IPv6 options from listening socket (if any)
+
+ Yes, keeping reference count would be much more clever,
+ but we make one more one thing there: reattach optmem
+ to newsk.
+ */
+ if (opt) {
+ newnp->opt = ipv6_dup_options(newsk, opt);
+ if (opt != np->opt)
+ sock_kfree_s(sk, opt, opt->tot_len);
+ }
+
+ inet_csk(newsk)->icsk_ext_hdr_len = 0;
+ if (newnp->opt)
+ inet_csk(newsk)->icsk_ext_hdr_len = (newnp->opt->opt_nflen +
+ newnp->opt->opt_flen);
+
+ dccp_sync_mss(newsk, dst_mtu(dst));
+
+ newinet->daddr = newinet->saddr = newinet->rcv_saddr = LOOPBACK4_IPV6;
+
+ __inet6_hash(&dccp_hashinfo, newsk);
+ inet_inherit_port(&dccp_hashinfo, sk, newsk);
+
+ return newsk;
+
+out_overflow:
+ NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS);
+out:
+ NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS);
+ if (opt && opt != np->opt)
+ sock_kfree_s(sk, opt, opt->tot_len);
+ dst_release(dst);
+ return NULL;
+}
+
+/* The socket must have it's spinlock held when we get
+ * here.
+ *
+ * We have a potential double-lock case here, so even when
+ * doing backlog processing we use the BH locking scheme.
+ * This is because we cannot sleep with the original spinlock
+ * held.
+ */
+static int dccp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
+{
+ struct ipv6_pinfo *np = inet6_sk(sk);
+ struct sk_buff *opt_skb = NULL;
+
+ /* Imagine: socket is IPv6. IPv4 packet arrives,
+ goes to IPv4 receive handler and backlogged.
+ From backlog it always goes here. Kerboom...
+ Fortunately, dccp_rcv_established and rcv_established
+ handle them correctly, but it is not case with
+ dccp_v6_hnd_req and dccp_v6_ctl_send_reset(). --ANK
+ */
+
+ if (skb->protocol == htons(ETH_P_IP))
+ return dccp_v4_do_rcv(sk, skb);
+
+ if (sk_filter(sk, skb, 0))
+ goto discard;
+
+ /*
+ * socket locking is here for SMP purposes as backlog rcv
+ * is currently called with bh processing disabled.
+ */
+
+ /* Do Stevens' IPV6_PKTOPTIONS.
+
+ Yes, guys, it is the only place in our code, where we
+ may make it not affecting IPv4.
+ The rest of code is protocol independent,
+ and I do not like idea to uglify IPv4.
+
+ Actually, all the idea behind IPV6_PKTOPTIONS
+ looks not very well thought. For now we latch
+ options, received in the last packet, enqueued
+ by tcp. Feel free to propose better solution.
+ --ANK (980728)
+ */
+ if (np->rxopt.all)
+ opt_skb = skb_clone(skb, GFP_ATOMIC);
+
+ if (sk->sk_state == DCCP_OPEN) { /* Fast path */
+ if (dccp_rcv_established(sk, skb, dccp_hdr(skb), skb->len))
+ goto reset;
+ return 0;
+ }
+
+ if (sk->sk_state == DCCP_LISTEN) {
+ struct sock *nsk = dccp_v6_hnd_req(sk, skb);
+ if (!nsk)
+ goto discard;
+
+ /*
+ * Queue it on the new socket if the new socket is active,
+ * otherwise we just shortcircuit this and continue with
+ * the new socket..
+ */
+ if(nsk != sk) {
+ if (dccp_child_process(sk, nsk, skb))
+ goto reset;
+ if (opt_skb)
+ __kfree_skb(opt_skb);
+ return 0;
+ }
+ }
+
+ if (dccp_rcv_state_process(sk, skb, dccp_hdr(skb), skb->len))
+ goto reset;
+ return 0;
+
+reset:
+ dccp_v6_ctl_send_reset(skb);
+discard:
+ if (opt_skb)
+ __kfree_skb(opt_skb);
+ kfree_skb(skb);
+ return 0;
+}
+
+static int dccp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
+{
+ const struct dccp_hdr *dh;
+ struct sk_buff *skb = *pskb;
+ struct sock *sk;
+
+ /* Step 1: Check header basics: */
+
+ if (dccp_invalid_packet(skb))
+ goto discard_it;
+
+ dh = dccp_hdr(skb);
+
+ DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
+ DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
+
+ if (dccp_packet_without_ack(skb))
+ DCCP_SKB_CB(skb)->dccpd_ack_seq = DCCP_PKT_WITHOUT_ACK_SEQ;
+ else
+ DCCP_SKB_CB(skb)->dccpd_ack_seq = dccp_hdr_ack_seq(skb);
+
+ /* Step 2:
+ * Look up flow ID in table and get corresponding socket */
+ sk = __inet6_lookup(&dccp_hashinfo, &skb->nh.ipv6h->saddr,
+ dh->dccph_sport,
+ &skb->nh.ipv6h->daddr, ntohs(dh->dccph_dport),
+ inet6_iif(skb));
+ /*
+ * Step 2:
+ * If no socket ...
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ */
+ if (sk == NULL)
+ goto no_dccp_socket;
+
+ /*
+ * Step 2:
+ * ... or S.state == TIMEWAIT,
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ */
+
+ if (sk->sk_state == DCCP_TIME_WAIT)
+ goto do_time_wait;
+
+ if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
+ goto discard_and_relse;
+
+ return sk_receive_skb(sk, skb) ? -1 : 0;
+
+no_dccp_socket:
+ if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
+ goto discard_it;
+ /*
+ * Step 2:
+ * Generate Reset(No Connection) unless P.type == Reset
+ * Drop packet and return
+ */
+ if (dh->dccph_type != DCCP_PKT_RESET) {
+ DCCP_SKB_CB(skb)->dccpd_reset_code =
+ DCCP_RESET_CODE_NO_CONNECTION;
+ dccp_v6_ctl_send_reset(skb);
+ }
+discard_it:
+
+ /*
+ * Discard frame
+ */
+
+ kfree_skb(skb);
+ return 0;
+
+discard_and_relse:
+ sock_put(sk);
+ goto discard_it;
+
+do_time_wait:
+ inet_twsk_put((struct inet_timewait_sock *)sk);
+ goto no_dccp_socket;
+}
+
+static struct inet_connection_sock_af_ops dccp_ipv6_af_ops = {
+ .queue_xmit = inet6_csk_xmit,
+ .send_check = dccp_v6_send_check,
+ .rebuild_header = inet6_sk_rebuild_header,
+ .conn_request = dccp_v6_conn_request,
+ .syn_recv_sock = dccp_v6_request_recv_sock,
+ .net_header_len = sizeof(struct ipv6hdr),
+ .setsockopt = ipv6_setsockopt,
+ .getsockopt = ipv6_getsockopt,
+ .addr2sockaddr = inet6_csk_addr2sockaddr,
+ .sockaddr_len = sizeof(struct sockaddr_in6)
+};
+
+/*
+ * DCCP over IPv4 via INET6 API
+ */
+static struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
+ .queue_xmit = ip_queue_xmit,
+ .send_check = dccp_v4_send_check,
+ .rebuild_header = inet_sk_rebuild_header,
+ .conn_request = dccp_v6_conn_request,
+ .syn_recv_sock = dccp_v6_request_recv_sock,
+ .net_header_len = sizeof(struct iphdr),
+ .setsockopt = ipv6_setsockopt,
+ .getsockopt = ipv6_getsockopt,
+ .addr2sockaddr = inet6_csk_addr2sockaddr,
+ .sockaddr_len = sizeof(struct sockaddr_in6)
+};
+
+/* NOTE: A lot of things set to zero explicitly by call to
+ * sk_alloc() so need not be done here.
+ */
+static int dccp_v6_init_sock(struct sock *sk)
+{
+ int err = dccp_v4_init_sock(sk);
+
+ if (err == 0)
+ inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops;
+
+ return err;
+}
+
+static int dccp_v6_destroy_sock(struct sock *sk)
+{
+ dccp_v4_destroy_sock(sk);
+ return inet6_destroy_sock(sk);
+}
+
+static struct proto dccp_v6_prot = {
+ .name = "DCCPv6",
+ .owner = THIS_MODULE,
+ .close = dccp_close,
+ .connect = dccp_v6_connect,
+ .disconnect = dccp_disconnect,
+ .ioctl = dccp_ioctl,
+ .init = dccp_v6_init_sock,
+ .setsockopt = dccp_setsockopt,
+ .getsockopt = dccp_getsockopt,
+ .sendmsg = dccp_sendmsg,
+ .recvmsg = dccp_recvmsg,
+ .backlog_rcv = dccp_v6_do_rcv,
+ .hash = dccp_v6_hash,
+ .unhash = dccp_unhash,
+ .accept = inet_csk_accept,
+ .get_port = dccp_v6_get_port,
+ .shutdown = dccp_shutdown,
+ .destroy = dccp_v6_destroy_sock,
+ .orphan_count = &dccp_orphan_count,
+ .max_header = MAX_DCCP_HEADER,
+ .obj_size = sizeof(struct dccp6_sock),
+ .rsk_prot = &dccp6_request_sock_ops,
+ .twsk_prot = &dccp6_timewait_sock_ops,
+};
+
+static struct inet6_protocol dccp_v6_protocol = {
+ .handler = dccp_v6_rcv,
+ .err_handler = dccp_v6_err,
+ .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
+};
+
+static struct proto_ops inet6_dccp_ops = {
+ .family = PF_INET6,
+ .owner = THIS_MODULE,
+ .release = inet6_release,
+ .bind = inet6_bind,
+ .connect = inet_stream_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = inet_accept,
+ .getname = inet6_getname,
+ .poll = dccp_poll,
+ .ioctl = inet6_ioctl,
+ .listen = inet_dccp_listen,
+ .shutdown = inet_shutdown,
+ .setsockopt = sock_common_setsockopt,
+ .getsockopt = sock_common_getsockopt,
+ .sendmsg = inet_sendmsg,
+ .recvmsg = sock_common_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+static struct inet_protosw dccp_v6_protosw = {
+ .type = SOCK_DCCP,
+ .protocol = IPPROTO_DCCP,
+ .prot = &dccp_v6_prot,
+ .ops = &inet6_dccp_ops,
+ .capability = -1,
+ .flags = INET_PROTOSW_ICSK,
+};
+
+static int __init dccp_v6_init(void)
+{
+ int err = proto_register(&dccp_v6_prot, 1);
+
+ if (err != 0)
+ goto out;
+
+ err = inet6_add_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
+ if (err != 0)
+ goto out_unregister_proto;
+
+ inet6_register_protosw(&dccp_v6_protosw);
+out:
+ return err;
+out_unregister_proto:
+ proto_unregister(&dccp_v6_prot);
+ goto out;
+}
+
+static void __exit dccp_v6_exit(void)
+{
+ inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP);
+ inet6_unregister_protosw(&dccp_v6_protosw);
+ proto_unregister(&dccp_v6_prot);
+}
+
+module_init(dccp_v6_init);
+module_exit(dccp_v6_exit);
+
+/*
+ * __stringify doesn't likes enums, so use SOCK_DCCP (6) and IPPROTO_DCCP (33)
+ * values directly, Also cover the case where the protocol is not specified,
+ * i.e. net-pf-PF_INET6-proto-0-type-SOCK_DCCP
+ */
+MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-33-type-6");
+MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-0-type-6");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@mandriva.com>");
+MODULE_DESCRIPTION("DCCPv6 - Datagram Congestion Controlled Protocol");
diff --git a/net/dccp/ipv6.h b/net/dccp/ipv6.h
new file mode 100644
index 000000000000..e4d4e9309270
--- /dev/null
+++ b/net/dccp/ipv6.h
@@ -0,0 +1,37 @@
+#ifndef _DCCP_IPV6_H
+#define _DCCP_IPV6_H
+/*
+ * net/dccp/ipv6.h
+ *
+ * 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/dccp.h>
+#include <linux/ipv6.h>
+
+struct dccp6_sock {
+ struct dccp_sock dccp;
+ /*
+ * ipv6_pinfo has to be the last member of dccp6_sock,
+ * see inet6_sk_generic.
+ */
+ struct ipv6_pinfo inet6;
+};
+
+struct dccp6_request_sock {
+ struct dccp_request_sock dccp;
+ struct inet6_request_sock inet6;
+};
+
+struct dccp6_timewait_sock {
+ struct inet_timewait_sock inet;
+ struct inet6_timewait_sock tw6;
+};
+
+#endif /* _DCCP_IPV6_H */
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 1393461898bb..29261fc198e7 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -40,6 +40,8 @@ struct inet_timewait_death_row dccp_death_row = {
(unsigned long)&dccp_death_row),
};
+EXPORT_SYMBOL_GPL(dccp_death_row);
+
void dccp_time_wait(struct sock *sk, int state, int timeo)
{
struct inet_timewait_sock *tw = NULL;
@@ -50,7 +52,18 @@ void dccp_time_wait(struct sock *sk, int state, int timeo)
if (tw != NULL) {
const struct inet_connection_sock *icsk = inet_csk(sk);
const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
-
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ if (tw->tw_family == PF_INET6) {
+ const struct ipv6_pinfo *np = inet6_sk(sk);
+ struct inet6_timewait_sock *tw6;
+
+ tw->tw_ipv6_offset = inet6_tw_offset(sk->sk_prot);
+ tw6 = inet6_twsk((struct sock *)tw);
+ ipv6_addr_copy(&tw6->tw_v6_daddr, &np->daddr);
+ ipv6_addr_copy(&tw6->tw_v6_rcv_saddr, &np->rcv_saddr);
+ tw->tw_ipv6only = np->ipv6only;
+ }
+#endif
/* Linkage updates. */
__inet_twsk_hashdance(tw, sk, &dccp_hashinfo);
@@ -170,6 +183,8 @@ out_free:
return newsk;
}
+EXPORT_SYMBOL_GPL(dccp_create_openreq_child);
+
/*
* Process an incoming packet for RESPOND sockets represented
* as an request_sock.
@@ -214,7 +229,7 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
goto drop;
}
- child = dccp_v4_request_recv_sock(sk, skb, req, NULL);
+ child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL);
if (child == NULL)
goto listen_overflow;
@@ -236,6 +251,8 @@ drop:
goto out;
}
+EXPORT_SYMBOL_GPL(dccp_check_req);
+
/*
* Queue segment on the new socket if the new socket is active,
* otherwise we just shortcircuit this and continue with
@@ -266,3 +283,5 @@ int dccp_child_process(struct sock *parent, struct sock *child,
sock_put(child);
return ret;
}
+
+EXPORT_SYMBOL_GPL(dccp_child_process);
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 74ff87025878..efd7ffb903a1 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/skbuff.h>
+#include <net/inet_sock.h>
#include <net/sock.h>
#include "ackvec.h"
@@ -43,6 +44,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
{
if (likely(skb != NULL)) {
const struct inet_sock *inet = inet_sk(sk);
+ const struct inet_connection_sock *icsk = inet_csk(sk);
struct dccp_sock *dp = dccp_sk(sk);
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
struct dccp_hdr *dh;
@@ -108,8 +110,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
break;
}
- dh->dccph_checksum = dccp_v4_checksum(skb, inet->saddr,
- inet->daddr);
+ icsk->icsk_af_ops->send_check(sk, skb->len, skb);
if (set_ack)
dccp_event_ack_sent(sk);
@@ -117,7 +118,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
- err = ip_queue_xmit(skb, 0);
+ err = icsk->icsk_af_ops->queue_xmit(skb, 0);
if (err <= 0)
return err;
@@ -134,20 +135,13 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
{
+ struct inet_connection_sock *icsk = inet_csk(sk);
struct dccp_sock *dp = dccp_sk(sk);
- int mss_now;
-
- /*
- * FIXME: we really should be using the af_specific thing to support
- * IPv6.
- * mss_now = pmtu - tp->af_specific->net_header_len -
- * sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext);
- */
- mss_now = pmtu - sizeof(struct iphdr) - sizeof(struct dccp_hdr) -
- sizeof(struct dccp_hdr_ext);
+ int mss_now = (pmtu - icsk->icsk_af_ops->net_header_len -
+ sizeof(struct dccp_hdr) - sizeof(struct dccp_hdr_ext));
/* Now subtract optional transport overhead */
- mss_now -= dp->dccps_ext_header_len;
+ mss_now -= icsk->icsk_ext_hdr_len;
/*
* FIXME: this should come from the CCID infrastructure, where, say,
@@ -160,12 +154,14 @@ unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu)
mss_now -= ((5 + 6 + 10 + 6 + 6 + 6 + 3) / 4) * 4;
/* And store cached results */
- dp->dccps_pmtu_cookie = pmtu;
+ icsk->icsk_pmtu_cookie = pmtu;
dp->dccps_mss_cache = mss_now;
return mss_now;
}
+EXPORT_SYMBOL_GPL(dccp_sync_mss);
+
void dccp_write_space(struct sock *sk)
{
read_lock(&sk->sk_callback_lock);
@@ -266,7 +262,7 @@ int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
{
- if (inet_sk_rebuild_header(sk) != 0)
+ if (inet_csk(sk)->icsk_af_ops->rebuild_header(sk) != 0)
return -EHOSTUNREACH; /* Routing failure or similar. */
return dccp_transmit_skb(sk, (skb_cloned(skb) ?
@@ -321,6 +317,8 @@ struct sk_buff *dccp_make_response(struct sock *sk, struct dst_entry *dst,
return skb;
}
+EXPORT_SYMBOL_GPL(dccp_make_response);
+
struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
const enum dccp_reset_codes code)
@@ -377,6 +375,7 @@ struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
*/
static inline void dccp_connect_init(struct sock *sk)
{
+ struct dccp_sock *dp = dccp_sk(sk);
struct dst_entry *dst = __sk_dst_get(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
@@ -385,10 +384,16 @@ static inline void dccp_connect_init(struct sock *sk)
dccp_sync_mss(sk, dst_mtu(dst));
- /*
- * FIXME: set dp->{dccps_swh,dccps_swl}, with
- * something like dccp_inc_seq
- */
+ dccp_update_gss(sk, dp->dccps_iss);
+ /*
+ * SWL and AWL are initially adjusted so that they are not less than
+ * the initial Sequence Numbers received and sent, respectively:
+ * SWL := max(GSR + 1 - floor(W/4), ISR),
+ * AWL := max(GSS - W' + 1, ISS).
+ * These adjustments MUST be applied only at the beginning of the
+ * connection.
+ */
+ dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
icsk->icsk_retransmits = 0;
}
@@ -420,6 +425,8 @@ int dccp_connect(struct sock *sk)
return 0;
}
+EXPORT_SYMBOL_GPL(dccp_connect);
+
void dccp_send_ack(struct sock *sk)
{
/* If we have been reset, we may not send again. */
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 8a6b2a9e4581..65b11ea90d85 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -24,7 +24,7 @@
#include <net/checksum.h>
#include <net/inet_common.h>
-#include <net/ip.h>
+#include <net/inet_sock.h>
#include <net/protocol.h>
#include <net/sock.h>
#include <net/xfrm.h>
@@ -34,15 +34,18 @@
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/poll.h>
-#include <linux/dccp.h>
#include "ccid.h"
#include "dccp.h"
DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly;
+EXPORT_SYMBOL_GPL(dccp_statistics);
+
atomic_t dccp_orphan_count = ATOMIC_INIT(0);
+EXPORT_SYMBOL_GPL(dccp_orphan_count);
+
static struct net_protocol dccp_protocol = {
.handler = dccp_v4_rcv,
.err_handler = dccp_v4_err,
@@ -149,6 +152,8 @@ int dccp_disconnect(struct sock *sk, int flags)
return err;
}
+EXPORT_SYMBOL_GPL(dccp_disconnect);
+
/*
* Wait for a DCCP event.
*
@@ -156,8 +161,8 @@ int dccp_disconnect(struct sock *sk, int flags)
* take care of normal races (between the test and the event) and we don't
* go look at any of the socket buffers directly.
*/
-static unsigned int dccp_poll(struct file *file, struct socket *sock,
- poll_table *wait)
+unsigned int dccp_poll(struct file *file, struct socket *sock,
+ poll_table *wait)
{
unsigned int mask;
struct sock *sk = sock->sk;
@@ -205,12 +210,16 @@ static unsigned int dccp_poll(struct file *file, struct socket *sock,
return mask;
}
+EXPORT_SYMBOL_GPL(dccp_poll);
+
int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
{
dccp_pr_debug("entry\n");
return -ENOIOCTLCMD;
}
+EXPORT_SYMBOL_GPL(dccp_ioctl);
+
static int dccp_setsockopt_service(struct sock *sk, const u32 service,
char __user *optval, int optlen)
{
@@ -254,7 +263,9 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
int val;
if (level != SOL_DCCP)
- return ip_setsockopt(sk, level, optname, optval, optlen);
+ return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
+ optname, optval,
+ optlen);
if (optlen < sizeof(int))
return -EINVAL;
@@ -282,6 +293,8 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
return err;
}
+EXPORT_SYMBOL_GPL(dccp_setsockopt);
+
static int dccp_getsockopt_service(struct sock *sk, int len,
u32 __user *optval,
int __user *optlen)
@@ -320,8 +333,9 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
int val, len;
if (level != SOL_DCCP)
- return ip_getsockopt(sk, level, optname, optval, optlen);
-
+ return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level,
+ optname, optval,
+ optlen);
if (get_user(len, optlen))
return -EFAULT;
@@ -354,6 +368,8 @@ int dccp_getsockopt(struct sock *sk, int level, int optname,
return 0;
}
+EXPORT_SYMBOL_GPL(dccp_getsockopt);
+
int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
size_t len)
{
@@ -410,6 +426,8 @@ out_discard:
goto out_release;
}
+EXPORT_SYMBOL_GPL(dccp_sendmsg);
+
int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
size_t len, int nonblock, int flags, int *addr_len)
{
@@ -507,7 +525,9 @@ out:
return len;
}
-static int inet_dccp_listen(struct socket *sock, int backlog)
+EXPORT_SYMBOL_GPL(dccp_recvmsg);
+
+int inet_dccp_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
unsigned char old_state;
@@ -543,6 +563,8 @@ out:
return err;
}
+EXPORT_SYMBOL_GPL(inet_dccp_listen);
+
static const unsigned char dccp_new_state[] = {
/* current state: new state: action: */
[0] = DCCP_CLOSED,
@@ -648,12 +670,16 @@ adjudge_to_death:
sock_put(sk);
}
+EXPORT_SYMBOL_GPL(dccp_close);
+
void dccp_shutdown(struct sock *sk, int how)
{
dccp_pr_debug("entry\n");
}
-static struct proto_ops inet_dccp_ops = {
+EXPORT_SYMBOL_GPL(dccp_shutdown);
+
+static const struct proto_ops inet_dccp_ops = {
.family = PF_INET,
.owner = THIS_MODULE,
.release = inet_release,
@@ -681,11 +707,11 @@ extern struct net_proto_family inet_family_ops;
static struct inet_protosw dccp_v4_protosw = {
.type = SOCK_DCCP,
.protocol = IPPROTO_DCCP,
- .prot = &dccp_v4_prot,
+ .prot = &dccp_prot,
.ops = &inet_dccp_ops,
.capability = -1,
.no_check = 0,
- .flags = 0,
+ .flags = INET_PROTOSW_ICSK,
};
/*
@@ -760,13 +786,15 @@ MODULE_PARM_DESC(thash_entries, "Number of ehash buckets");
int dccp_debug;
module_param(dccp_debug, int, 0444);
MODULE_PARM_DESC(dccp_debug, "Enable debug messages");
+
+EXPORT_SYMBOL_GPL(dccp_debug);
#endif
static int __init dccp_init(void)
{
unsigned long goal;
int ehash_order, bhash_order, i;
- int rc = proto_register(&dccp_v4_prot, 1);
+ int rc = proto_register(&dccp_prot, 1);
if (rc)
goto out;
@@ -869,7 +897,7 @@ out_free_bind_bucket_cachep:
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
dccp_hashinfo.bind_bucket_cachep = NULL;
out_proto_unregister:
- proto_unregister(&dccp_v4_prot);
+ proto_unregister(&dccp_prot);
goto out;
}
@@ -892,7 +920,7 @@ static void __exit dccp_fini(void)
get_order(dccp_hashinfo.ehash_size *
sizeof(struct inet_ehash_bucket)));
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
- proto_unregister(&dccp_v4_prot);
+ proto_unregister(&dccp_prot);
}
module_init(dccp_init);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.