* 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>
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;
}
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);
/* Build DCCP header and checksum it. */
- memset(dh, 0, dccp_header_size);
+ dh = dccp_zeroed_hdr(skb, dccp_header_size);
dh->dccph_type = dcb->dccpd_type;
dh->dccph_sport = inet->sport;
dh->dccph_dport = inet->dport;
dh->dccph_doff = (dccp_header_size + dcb->dccpd_opt_len) / 4;
dh->dccph_ccval = dcb->dccpd_ccval;
+ dh->dccph_cscov = dp->dccps_pcslen;
/* XXX For now we're using only 48 bits sequence numbers */
dh->dccph_x = 1;
break;
}
- icsk->icsk_af_ops->send_check(sk, skb->len, skb);
+ icsk->icsk_af_ops->send_check(sk, 0, skb);
if (set_ack)
dccp_event_ack_sent(sk);
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
- err = icsk->icsk_af_ops->queue_xmit(skb, 0);
- if (err <= 0)
- return err;
-
- /* NET_XMIT_CN is special. It does not guarantee,
- * that this packet is lost. It tells that device
- * is about to start to drop packets or already
- * drops some packets of the same priority and
- * invokes us to send less aggressively.
- */
- return err == NET_XMIT_CN ? 0 : err;
+ err = icsk->icsk_af_ops->queue_xmit(skb, sk, 0);
+ return net_xmit_eval(err);
}
return -ENOBUFS;
}
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 = DCCP_XMIT_TIMEO; /* If a packet is taking longer than
+ this 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);
+ timeo = DCCP_XMIT_TIMEO;
+ }
+ if (err)
+ DCCP_BUG("err=%d after dccp_wait_for_ccid", err);
+ }
- 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)
+ DCCP_BUG("err=%d after ccid_hc_tx_packet_sent",
+ err);
+ } 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);
+ if (inet_rsk(req)->acked) /* increase ISS upon retransmission */
+ dccp_inc_seqno(&dreq->dreq_iss);
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_RESPONSE;
DCCP_SKB_CB(skb)->dccpd_seq = dreq->dreq_iss;
- dccp_insert_options(sk, skb);
- skb->h.raw = skb_push(skb, dccp_header_size);
+ if (dccp_insert_options(sk, skb)) {
+ kfree_skb(skb);
+ return NULL;
+ }
- dh = dccp_hdr(skb);
- memset(dh, 0, dccp_header_size);
+ /* Build and checksum header */
+ dh = dccp_zeroed_hdr(skb, dccp_header_size);
dh->dccph_sport = inet_sk(sk)->sport;
dh->dccph_dport = inet_rsk(req)->rmt_port;
dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dreq->dreq_isr);
dccp_hdr_response(skb)->dccph_resp_service = dreq->dreq_service;
+ dccp_csum_outgoing(skb);
+
+ /* We use `acked' to remember that a Response was already sent. */
+ inet_rsk(req)->acked = 1;
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
return skb;
}
{
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_inc_seqno(&dp->dccps_gss);
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);
- skb->h.raw = skb_push(skb, dccp_header_size);
+ if (dccp_insert_options(sk, skb)) {
+ kfree_skb(skb);
+ return NULL;
+ }
- dh = dccp_hdr(skb);
- memset(dh, 0, dccp_header_size);
+ dh = dccp_zeroed_hdr(skb, dccp_header_size);
dh->dccph_sport = inet_sk(sk)->sport;
dh->dccph_dport = inet_sk(sk)->dport;
dccp_hdr_set_ack(dccp_hdr_ack_bits(skb), dp->dccps_gsr);
dccp_hdr_reset(skb)->dccph_reset_code = code;
- inet_csk(sk)->icsk_af_ops->send_check(sk, skb->len, skb);
+ inet_csk(sk)->icsk_af_ops->send_check(sk, 0, skb);
DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
return skb;
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;
+ err = inet_csk(sk)->icsk_af_ops->queue_xmit(skb, sk, 0);
+ return net_xmit_eval(err);
}
}
dccp_sync_mss(sk, dst_mtu(dst));
- 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:
* These adjustments MUST be applied only at the beginning of the
* connection.
*/
+ dccp_update_gss(sk, dp->dccps_iss);
dccp_set_seqno(&dp->dccps_awl, max48(dp->dccps_awl, dp->dccps_iss));
+ /* S.GAR - greatest valid acknowledgement number received on a non-Sync;
+ * initialized to S.ISS (sec. 8.5) */
+ dp->dccps_gar = 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;
dccp_skb_entail(sk, skb);
dccp_transmit_skb(sk, skb_clone(skb, GFP_KERNEL));
{
/* 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->csum = 0;
+ skb_reserve(skb, sk->sk_prot->max_header);
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->csum = 0;
+ skb_reserve(skb, sk->sk_prot->max_header);
DCCP_SKB_CB(skb)->dccpd_type = pkt_type;
DCCP_SKB_CB(skb)->dccpd_seq = seq;
/* Reserve space for headers and prepare control bits. */
skb_reserve(skb, sk->sk_prot->max_header);
- skb->csum = 0;
DCCP_SKB_CB(skb)->dccpd_type = dp->dccps_role == DCCP_ROLE_CLIENT ?
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