* 2 of the License, or (at your option) any later version.
*/
-#include <linux/config.h>
#include <linux/dccp.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
}
-static inline void dccp_skb_entail(struct sock *sk, struct sk_buff *skb)
+static void dccp_skb_entail(struct sock *sk, struct sk_buff *skb)
{
skb_set_owner_w(skb, sk);
WARN_ON(sk->sk_send_head);
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
struct dccp_hdr *dh;
/* XXX For now we're using only 48 bits sequence numbers */
- const int dccp_header_size = sizeof(*dh) +
+ const u32 dccp_header_size = sizeof(*dh) +
sizeof(struct dccp_hdr_ext) +
dccp_packet_hdr_len(dcb->dccpd_type);
int err, set_ack = 1;
case DCCP_PKT_DATAACK:
break;
+ case DCCP_PKT_REQUEST:
+ set_ack = 0;
+ /* fall through */
+
case DCCP_PKT_SYNC:
case DCCP_PKT_SYNCACK:
ackno = dcb->dccpd_seq;
}
dcb->dccpd_seq = dp->dccps_gss;
- dccp_insert_options(sk, skb);
+
+ if (dccp_insert_options(sk, skb)) {
+ kfree_skb(skb);
+ return -EPROTO;
+ }
skb->h.raw = skb_push(skb, dccp_header_size);
dh = dccp_hdr(skb);
while (1) {
prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
- if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
+ if (sk->sk_err)
goto do_error;
if (!*timeo)
goto do_nonblock;
goto out;
}
-int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo)
+static void dccp_write_xmit_timer(unsigned long data) {
+ struct sock *sk = (struct sock *)data;
+ struct dccp_sock *dp = dccp_sk(sk);
+
+ bh_lock_sock(sk);
+ if (sock_owned_by_user(sk))
+ sk_reset_timer(sk, &dp->dccps_xmit_timer, jiffies+1);
+ else
+ dccp_write_xmit(sk, 0);
+ bh_unlock_sock(sk);
+ sock_put(sk);
+}
+
+void dccp_write_xmit(struct sock *sk, int block)
{
- const struct dccp_sock *dp = dccp_sk(sk);
- int err = ccid_hc_tx_send_packet(dp->dccps_hc_tx_ccid, sk, skb,
+ struct dccp_sock *dp = dccp_sk(sk);
+ struct sk_buff *skb;
+ long timeo = 30000; /* If a packet is taking longer than 2 secs
+ we have other issues */
+
+ while ((skb = skb_peek(&sk->sk_write_queue))) {
+ int err = ccid_hc_tx_send_packet(dp->dccps_hc_tx_ccid, sk, skb,
skb->len);
- if (err > 0)
- err = dccp_wait_for_ccid(sk, skb, timeo);
+ if (err > 0) {
+ if (!block) {
+ sk_reset_timer(sk, &dp->dccps_xmit_timer,
+ msecs_to_jiffies(err)+jiffies);
+ break;
+ } else
+ err = dccp_wait_for_ccid(sk, skb, &timeo);
+ if (err) {
+ printk(KERN_CRIT "%s:err at dccp_wait_for_ccid"
+ " %d\n", __FUNCTION__, err);
+ dump_stack();
+ }
+ }
- if (err == 0) {
- struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
- const int len = skb->len;
+ skb_dequeue(&sk->sk_write_queue);
+ if (err == 0) {
+ struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
+ const int len = skb->len;
- if (sk->sk_state == DCCP_PARTOPEN) {
- /* See 8.1.5. Handshake Completion */
- inet_csk_schedule_ack(sk);
- inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
+ if (sk->sk_state == DCCP_PARTOPEN) {
+ /* See 8.1.5. Handshake Completion */
+ inet_csk_schedule_ack(sk);
+ inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
inet_csk(sk)->icsk_rto,
DCCP_RTO_MAX);
- dcb->dccpd_type = DCCP_PKT_DATAACK;
- } else if (dccp_ack_pending(sk))
- dcb->dccpd_type = DCCP_PKT_DATAACK;
- else
- dcb->dccpd_type = DCCP_PKT_DATA;
-
- err = dccp_transmit_skb(sk, skb);
- ccid_hc_tx_packet_sent(dp->dccps_hc_tx_ccid, sk, 0, len);
- } else
- kfree_skb(skb);
-
- return err;
+ dcb->dccpd_type = DCCP_PKT_DATAACK;
+ } else if (dccp_ack_pending(sk))
+ dcb->dccpd_type = DCCP_PKT_DATAACK;
+ else
+ dcb->dccpd_type = DCCP_PKT_DATA;
+
+ err = dccp_transmit_skb(sk, skb);
+ ccid_hc_tx_packet_sent(dp->dccps_hc_tx_ccid, sk, 0, len);
+ if (err) {
+ printk(KERN_CRIT "%s:err from "
+ "ccid_hc_tx_packet_sent %d\n",
+ __FUNCTION__, err);
+ dump_stack();
+ }
+ } else
+ kfree(skb);
+ }
}
int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb)
{
struct dccp_hdr *dh;
struct dccp_request_sock *dreq;
- const int dccp_header_size = sizeof(struct dccp_hdr) +
+ const u32 dccp_header_size = sizeof(struct dccp_hdr) +
sizeof(struct dccp_hdr_ext) +
sizeof(struct dccp_hdr_response);
- struct sk_buff *skb = sock_wmalloc(sk, MAX_HEADER + DCCP_MAX_OPT_LEN +
- dccp_header_size, 1,
+ struct sk_buff *skb = sock_wmalloc(sk, sk->sk_prot->max_header, 1,
GFP_ATOMIC);
if (skb == NULL)
return NULL;
/* Reserve space for headers. */
- skb_reserve(skb, MAX_HEADER + DCCP_MAX_OPT_LEN + dccp_header_size);
+ skb_reserve(skb, sk->sk_prot->max_header);
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 = dreq->dreq_iss;
- dccp_insert_options(sk, skb);
+
+ if (dccp_insert_options(sk, skb)) {
+ kfree_skb(skb);
+ return NULL;
+ }
skb->h.raw = skb_push(skb, dccp_header_size);
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);
-
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
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)
+static struct sk_buff *dccp_make_reset(struct sock *sk, struct dst_entry *dst,
+ const enum dccp_reset_codes code)
{
struct dccp_hdr *dh;
struct dccp_sock *dp = dccp_sk(sk);
- const int dccp_header_size = sizeof(struct dccp_hdr) +
+ const u32 dccp_header_size = sizeof(struct dccp_hdr) +
sizeof(struct dccp_hdr_ext) +
sizeof(struct dccp_hdr_reset);
- struct sk_buff *skb = sock_wmalloc(sk, MAX_HEADER + DCCP_MAX_OPT_LEN +
- dccp_header_size, 1,
+ struct sk_buff *skb = sock_wmalloc(sk, sk->sk_prot->max_header, 1,
GFP_ATOMIC);
if (skb == NULL)
return NULL;
/* Reserve space for headers. */
- skb_reserve(skb, MAX_HEADER + DCCP_MAX_OPT_LEN + dccp_header_size);
+ skb_reserve(skb, sk->sk_prot->max_header);
skb->dst = dst_clone(dst);
skb->csum = 0;
DCCP_SKB_CB(skb)->dccpd_reset_code = code;
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_RESET;
DCCP_SKB_CB(skb)->dccpd_seq = dp->dccps_gss;
- dccp_insert_options(sk, skb);
+
+ if (dccp_insert_options(sk, skb)) {
+ kfree_skb(skb);
+ return NULL;
+ }
skb->h.raw = skb_push(skb, dccp_header_size);
dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dp->dccps_gsr);
dccp_hdr_reset(skb)->dccph_reset_code = code;
-
- dh->dccph_checksum = dccp_v4_checksum(skb, inet_sk(sk)->saddr,
- inet_sk(sk)->daddr);
+ inet_csk(sk)->icsk_af_ops->send_check(sk, skb->len, skb);
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
return skb;
}
+int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code)
+{
+ /*
+ * FIXME: what if rebuild_header fails?
+ * Should we be doing a rebuild_header here?
+ */
+ int err = inet_sk_rebuild_header(sk);
+
+ if (err == 0) {
+ struct sk_buff *skb = dccp_make_reset(sk, sk->sk_dst_cache,
+ code);
+ if (skb != NULL) {
+ memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
+ err = inet_csk(sk)->icsk_af_ops->queue_xmit(skb, 0);
+ if (err == NET_XMIT_CN)
+ err = 0;
+ }
+ }
+
+ return err;
+}
+
/*
* Do all connect socket setups that can be done AF independent.
*/
dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
icsk->icsk_retransmits = 0;
+ init_timer(&dp->dccps_xmit_timer);
+ dp->dccps_xmit_timer.data = (unsigned long)sk;
+ dp->dccps_xmit_timer.function = dccp_write_xmit_timer;
}
int dccp_connect(struct sock *sk)
dccp_connect_init(sk);
- skb = alloc_skb(MAX_DCCP_HEADER + 15, sk->sk_allocation);
+ skb = alloc_skb(sk->sk_prot->max_header, sk->sk_allocation);
if (unlikely(skb == NULL))
return -ENOBUFS;
/* Reserve space for headers. */
- skb_reserve(skb, MAX_DCCP_HEADER);
+ skb_reserve(skb, sk->sk_prot->max_header);
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_REQUEST;
skb->csum = 0;
{
/* If we have been reset, we may not send again. */
if (sk->sk_state != DCCP_CLOSED) {
- struct sk_buff *skb = alloc_skb(MAX_DCCP_HEADER, GFP_ATOMIC);
+ struct sk_buff *skb = alloc_skb(sk->sk_prot->max_header,
+ GFP_ATOMIC);
if (skb == NULL) {
inet_csk_schedule_ack(sk);
}
/* Reserve space for headers */
- skb_reserve(skb, MAX_DCCP_HEADER);
+ skb_reserve(skb, sk->sk_prot->max_header);
skb->csum = 0;
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_ACK;
dccp_transmit_skb(sk, skb);
* dccp_transmit_skb() will set the ownership to this
* sock.
*/
- struct sk_buff *skb = alloc_skb(MAX_DCCP_HEADER, GFP_ATOMIC);
+ struct sk_buff *skb = alloc_skb(sk->sk_prot->max_header, GFP_ATOMIC);
if (skb == NULL)
/* FIXME: how to make sure the sync is sent? */
return;
/* Reserve space for headers and prepare control bits. */
- skb_reserve(skb, MAX_DCCP_HEADER);
+ skb_reserve(skb, sk->sk_prot->max_header);
skb->csum = 0;
DCCP_SKB_CB(skb)->dccpd_type = pkt_type;
DCCP_SKB_CB(skb)->dccpd_seq = seq;
dccp_transmit_skb(sk, skb);
}
+EXPORT_SYMBOL_GPL(dccp_send_sync);
+
/*
* Send a DCCP_PKT_CLOSE/CLOSEREQ. The caller locks the socket for us. This
* cannot be allowed to fail queueing a DCCP_PKT_CLOSE/CLOSEREQ frame under
DCCP_PKT_CLOSE : DCCP_PKT_CLOSEREQ;
if (active) {
+ dccp_write_xmit(sk, 1);
dccp_skb_entail(sk, skb);
dccp_transmit_skb(sk, skb_clone(skb, prio));
+ /* FIXME do we need a retransmit timer here? */
} else
dccp_transmit_skb(sk, skb);
}
projects / powerpc.git / blobdiff