X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fdccp%2Fminisocks.c;h=af226a063141dc936ab558b6b5243bcdbcef37a7;hb=477781477a88f60c89003c852def4aedc6f78101;hp=18461bc04cbefae76dc8073878a53ec51bda0885;hpb=b0e567806d16586629468c824dfb2e71155df7da;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c index 18461bc..af226a0 100644 --- a/net/dccp/minisocks.c +++ b/net/dccp/minisocks.c @@ -10,8 +10,8 @@ * 2 of the License, or (at your option) any later version. */ -#include #include +#include #include #include @@ -19,19 +19,20 @@ #include #include +#include "ackvec.h" #include "ccid.h" #include "dccp.h" +#include "feat.h" struct inet_timewait_death_row dccp_death_row = { .sysctl_max_tw_buckets = NR_FILE * 2, .period = DCCP_TIMEWAIT_LEN / INET_TWDR_TWKILL_SLOTS, - .death_lock = SPIN_LOCK_UNLOCKED, + .death_lock = __SPIN_LOCK_UNLOCKED(dccp_death_row.death_lock), .hashinfo = &dccp_hashinfo, .tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0, (unsigned long)&dccp_death_row), .twkill_work = __WORK_INITIALIZER(dccp_death_row.twkill_work, - inet_twdr_twkill_work, - &dccp_death_row), + inet_twdr_twkill_work), /* Short-time timewait calendar */ .twcal_hand = -1, @@ -39,6 +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; @@ -49,7 +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); @@ -69,8 +83,7 @@ void dccp_time_wait(struct sock *sk, int state, int timeo) * socket up. We've got bigger problems than * non-graceful socket closings. */ - LIMIT_NETDEBUG(KERN_INFO "DCCP: time wait bucket " - "table overflow\n"); + DCCP_WARN("time wait bucket table overflow\n"); } dccp_done(sk); @@ -83,70 +96,38 @@ struct sock *dccp_create_openreq_child(struct sock *sk, /* * Step 3: Process LISTEN state * - * // Generate a new socket and switch to that socket - * Set S := new socket for this port pair + * (* Generate a new socket and switch to that socket *) + * Set S := new socket for this port pair */ struct sock *newsk = inet_csk_clone(sk, req, GFP_ATOMIC); if (newsk != NULL) { - const struct dccp_request_sock *dreq = dccp_rsk(req); - struct inet_connection_sock *newicsk = inet_csk(sk); + struct dccp_request_sock *dreq = dccp_rsk(req); + struct inet_connection_sock *newicsk = inet_csk(newsk); struct dccp_sock *newdp = dccp_sk(newsk); - newdp->dccps_hc_rx_ackpkts = NULL; - newdp->dccps_role = DCCP_ROLE_SERVER; - newicsk->icsk_rto = DCCP_TIMEOUT_INIT; - do_gettimeofday(&newdp->dccps_epoch); - - if (newdp->dccps_options.dccpo_send_ack_vector) { - newdp->dccps_hc_rx_ackpkts = - dccp_ackpkts_alloc(DCCP_MAX_ACK_VECTOR_LEN, - GFP_ATOMIC); - /* - * XXX: We're using the same CCIDs set on the parent, - * i.e. sk_clone copied the master sock and left the - * CCID pointers for this child, that is why we do the - * __ccid_get calls. - */ - if (unlikely(newdp->dccps_hc_rx_ackpkts == NULL)) - goto out_free; - } - - if (unlikely(ccid_hc_rx_init(newdp->dccps_hc_rx_ccid, - newsk) != 0 || - ccid_hc_tx_init(newdp->dccps_hc_tx_ccid, - newsk) != 0)) { - dccp_ackpkts_free(newdp->dccps_hc_rx_ackpkts); - ccid_hc_rx_exit(newdp->dccps_hc_rx_ccid, newsk); - ccid_hc_tx_exit(newdp->dccps_hc_tx_ccid, newsk); -out_free: - /* It is still raw copy of parent, so invalidate - * destructor and make plain sk_free() */ - newsk->sk_destruct = NULL; - sk_free(newsk); - return NULL; - } - - __ccid_get(newdp->dccps_hc_rx_ccid); - __ccid_get(newdp->dccps_hc_tx_ccid); + newdp->dccps_role = DCCP_ROLE_SERVER; + newdp->dccps_hc_rx_ackvec = NULL; + newdp->dccps_service_list = NULL; + newdp->dccps_service = dreq->dreq_service; + newdp->dccps_timestamp_echo = dreq->dreq_timestamp_echo; + newdp->dccps_timestamp_time = dreq->dreq_timestamp_time; + newicsk->icsk_rto = DCCP_TIMEOUT_INIT; + INIT_LIST_HEAD(&newdp->dccps_featneg); /* * Step 3: Process LISTEN state * - * Choose S.ISS (initial seqno) or set from Init Cookie - * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init - * Cookie + * Choose S.ISS (initial seqno) or set from Init Cookies + * Initialize S.GAR := S.ISS + * Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookies */ + newdp->dccps_gar = newdp->dccps_iss = dreq->dreq_iss; + dccp_update_gss(newsk, dreq->dreq_iss); - /* See dccp_v4_conn_request */ - newdp->dccps_options.dccpo_sequence_window = req->rcv_wnd; - - newdp->dccps_gar = newdp->dccps_isr = dreq->dreq_isr; + newdp->dccps_isr = dreq->dreq_isr; dccp_update_gsr(newsk, dreq->dreq_isr); - newdp->dccps_iss = dreq->dreq_iss; - dccp_update_gss(newsk, dreq->dreq_iss); - /* * SWL and AWL are initially adjusted so that they are not less than * the initial Sequence Numbers received and sent, respectively: @@ -160,6 +141,17 @@ out_free: dccp_set_seqno(&newdp->dccps_awl, max48(newdp->dccps_awl, newdp->dccps_iss)); + /* + * Activate features after initialising the sequence numbers, + * since CCID initialisation may depend on GSS, ISR, ISS etc. + */ + if (dccp_feat_activate_values(newsk, &dreq->dreq_featneg)) { + /* It is still raw copy of parent, so invalidate + * destructor and make plain sk_free() */ + newsk->sk_destruct = NULL; + sk_free(newsk); + return NULL; + } dccp_init_xmit_timers(newsk); DCCP_INC_STATS_BH(DCCP_MIB_PASSIVEOPENS); @@ -167,7 +159,9 @@ out_free: return newsk; } -/* +EXPORT_SYMBOL_GPL(dccp_create_openreq_child); + +/* * Process an incoming packet for RESPOND sockets represented * as an request_sock. */ @@ -176,18 +170,20 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, struct request_sock **prev) { struct sock *child = NULL; + struct dccp_request_sock *dreq = dccp_rsk(req); /* Check for retransmitted REQUEST */ if (dccp_hdr(skb)->dccph_type == DCCP_PKT_REQUEST) { - if (after48(DCCP_SKB_CB(skb)->dccpd_seq, - dccp_rsk(req)->dreq_isr)) { - struct dccp_request_sock *dreq = dccp_rsk(req); + if (after48(DCCP_SKB_CB(skb)->dccpd_seq, dreq->dreq_isr)) { dccp_pr_debug("Retransmitted REQUEST\n"); - /* Send another RESPONSE packet */ - dccp_set_seqno(&dreq->dreq_iss, dreq->dreq_iss + 1); - dccp_set_seqno(&dreq->dreq_isr, - DCCP_SKB_CB(skb)->dccpd_seq); + dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq; + /* + * Send another RESPONSE packet + * To protect against Request floods, increment retrans + * counter (backoff, monitored by dccp_response_timer). + */ + req->retrans++; req->rsk_ops->rtx_syn_ack(sk, req, NULL); } /* Network Duplicate, discard packet */ @@ -201,22 +197,22 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, goto drop; /* Invalid ACK */ - if (DCCP_SKB_CB(skb)->dccpd_ack_seq != dccp_rsk(req)->dreq_iss) { + if (DCCP_SKB_CB(skb)->dccpd_ack_seq != dreq->dreq_iss) { dccp_pr_debug("Invalid ACK number: ack_seq=%llu, " "dreq_iss=%llu\n", (unsigned long long) DCCP_SKB_CB(skb)->dccpd_ack_seq, - (unsigned long long) - dccp_rsk(req)->dreq_iss); + (unsigned long long) dreq->dreq_iss); goto drop; } - child = dccp_v4_request_recv_sock(sk, skb, req, NULL); + if (dccp_parse_options(sk, dreq, skb)) + goto drop; + + child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL); if (child == NULL) goto listen_overflow; - /* FIXME: deal with options */ - inet_csk_reqsk_queue_unlink(sk, req, prev); inet_csk_reqsk_queue_removed(sk, req); inet_csk_reqsk_queue_add(sk, req, child); @@ -227,12 +223,14 @@ listen_overflow: DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY; drop: if (dccp_hdr(skb)->dccph_type != DCCP_PKT_RESET) - req->rsk_ops->send_reset(skb); + req->rsk_ops->send_reset(sk, skb); inet_csk_reqsk_queue_drop(sk, req, prev); 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 @@ -263,3 +261,29 @@ int dccp_child_process(struct sock *parent, struct sock *child, sock_put(child); return ret; } + +EXPORT_SYMBOL_GPL(dccp_child_process); + +void dccp_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, + struct request_sock *rsk) +{ + DCCP_BUG("DCCP-ACK packets are never sent in LISTEN/RESPOND state"); +} + +EXPORT_SYMBOL_GPL(dccp_reqsk_send_ack); + +int dccp_reqsk_init(struct request_sock *req, + struct dccp_sock const *dp, struct sk_buff const *skb) +{ + struct dccp_request_sock *dreq = dccp_rsk(req); + + inet_rsk(req)->rmt_port = dccp_hdr(skb)->dccph_sport; + inet_rsk(req)->loc_port = dccp_hdr(skb)->dccph_dport; + inet_rsk(req)->acked = 0; + dreq->dreq_timestamp_echo = 0; + + /* inherit feature negotiation options from listening socket */ + return dccp_feat_clone_list(&dp->dccps_featneg, &dreq->dreq_featneg); +} + +EXPORT_SYMBOL_GPL(dccp_reqsk_init);