X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=net%2Fdccp%2Finput.c;h=3454d59419006d7f83e4d3858cfecb3e93af773d;hb=8c71632f7a13357b7dc5636fca68317f72d3043e;hp=ce8396b126d242c70f6b7a72e311ec10432844a0;hpb=a3054d48b9b9d6290eccc9fc09c286ef450d9b1d;p=powerpc.git diff --git a/net/dccp/input.c b/net/dccp/input.c index ce8396b126..3454d59419 100644 --- a/net/dccp/input.c +++ b/net/dccp/input.c @@ -16,6 +16,7 @@ #include +#include "ackvec.h" #include "ccid.h" #include "dccp.h" @@ -31,14 +32,10 @@ static void dccp_fin(struct sock *sk, struct sk_buff *skb) static void dccp_rcv_close(struct sock *sk, struct sk_buff *skb) { - switch (sk->sk_state) { - case DCCP_PARTOPEN: - case DCCP_OPEN: - dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED); - dccp_fin(sk, skb); - dccp_set_state(sk, DCCP_CLOSED); - break; - } + dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED); + dccp_fin(sk, skb); + dccp_set_state(sk, DCCP_CLOSED); + sk_wake_async(sk, 1, POLL_HUP); } static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb) @@ -54,13 +51,9 @@ static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb) return; } - switch (sk->sk_state) { - case DCCP_PARTOPEN: - case DCCP_OPEN: + if (sk->sk_state != DCCP_CLOSING) dccp_set_state(sk, DCCP_CLOSING); - dccp_send_close(sk); - break; - } + dccp_send_close(sk, 0); } static inline void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb) @@ -68,8 +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) @@ -141,10 +134,16 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb) "(P.ackno %s or LAWL(%llu) <= P.ackno(%llu) <= S.AWH(%llu), " "sending SYNC...\n", dccp_packet_name(dh->dccph_type), - lswl, DCCP_SKB_CB(skb)->dccpd_seq, dp->dccps_swh, + (unsigned long long) lswl, + (unsigned long long) + DCCP_SKB_CB(skb)->dccpd_seq, + (unsigned long long) dp->dccps_swh, (DCCP_SKB_CB(skb)->dccpd_ack_seq == DCCP_PKT_WITHOUT_ACK_SEQ) ? "doesn't exist" : "exists", - lawl, DCCP_SKB_CB(skb)->dccpd_ack_seq, dp->dccps_awh); + (unsigned long long) lawl, + (unsigned long long) + DCCP_SKB_CB(skb)->dccpd_ack_seq, + (unsigned long long) dp->dccps_awh); dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq, DCCP_PKT_SYNC); return -1; } @@ -166,37 +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, - 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); @@ -314,7 +287,19 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk, } dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq; - dccp_update_gsr(sk, DCCP_SKB_CB(skb)->dccpd_seq); + dccp_update_gsr(sk, dp->dccps_isr); + /* + * 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. + * + * AWL was adjusted in dccp_v4_connect -acme + */ + dccp_set_seqno(&dp->dccps_swl, + max48(dp->dccps_swl, dp->dccps_isr)); if (ccid_hc_rx_init(dp->dccps_hc_rx_ccid, sk) != 0 || ccid_hc_tx_init(dp->dccps_hc_tx_ccid, sk) != 0) { @@ -374,9 +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, @@ -390,6 +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: /* @@ -408,7 +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) */ @@ -423,6 +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; @@ -463,7 +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; } @@ -477,36 +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, - 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; } /* @@ -541,13 +513,24 @@ 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); + goto discard; + } else if (dh->dccph_type == DCCP_PKT_CLOSE) { + dccp_rcv_close(sk, skb); + return 0; + } + + if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) { + 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: