author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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1 |
/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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2 |
* net/dccp/minisocks.c |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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3 |
* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* An implementation of the DCCP protocol |
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Port of Linux 2.6.28 for use with network simulation cradle.
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5 |
* Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* This program is free software; you can redistribute it and/or |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* modify it under the terms of the GNU General Public License |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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9 |
* as published by the Free Software Foundation; either version |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* 2 of the License, or (at your option) any later version. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/dccp.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/kernel.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/skbuff.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <linux/timer.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#include <net/sock.h> |
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#include <net/xfrm.h> |
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#include <net/inet_timewait_sock.h> |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#include "ackvec.h" |
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#include "ccid.h" |
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#include "dccp.h" |
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#include "feat.h" |
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|
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struct inet_timewait_death_row dccp_death_row = { |
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.sysctl_max_tw_buckets = NR_FILE * 2, |
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.period = DCCP_TIMEWAIT_LEN / INET_TWDR_TWKILL_SLOTS, |
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.death_lock = __SPIN_LOCK_UNLOCKED(dccp_death_row.death_lock), |
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.hashinfo = &dccp_hashinfo, |
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.tw_timer = TIMER_INITIALIZER(inet_twdr_hangman, 0, |
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(unsigned long)&dccp_death_row), |
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.twkill_work = __WORK_INITIALIZER(dccp_death_row.twkill_work, |
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inet_twdr_twkill_work), |
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/* Short-time timewait calendar */ |
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|
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.twcal_hand = -1, |
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.twcal_timer = TIMER_INITIALIZER(inet_twdr_twcal_tick, 0, |
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(unsigned long)&dccp_death_row), |
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Port of Linux 2.6.28 for use with network simulation cradle.
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}; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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EXPORT_SYMBOL_GPL(dccp_death_row); |
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|
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void dccp_minisock_init(struct dccp_minisock *dmsk) |
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{ |
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dmsk->dccpms_sequence_window = sysctl_dccp_feat_sequence_window; |
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} |
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|
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void dccp_time_wait(struct sock *sk, int state, int timeo) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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{ |
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struct inet_timewait_sock *tw = NULL; |
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|
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if (dccp_death_row.tw_count < dccp_death_row.sysctl_max_tw_buckets) |
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tw = inet_twsk_alloc(sk, state); |
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|
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if (tw != NULL) { |
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const struct inet_connection_sock *icsk = inet_csk(sk); |
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const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1); |
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
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if (tw->tw_family == PF_INET6) { |
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const struct ipv6_pinfo *np = inet6_sk(sk); |
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struct inet6_timewait_sock *tw6; |
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|
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tw->tw_ipv6_offset = inet6_tw_offset(sk->sk_prot); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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tw6 = inet6_twsk((struct sock *)tw); |
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ipv6_addr_copy(&tw6->tw_v6_daddr, &np->daddr); |
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ipv6_addr_copy(&tw6->tw_v6_rcv_saddr, &np->rcv_saddr); |
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tw->tw_ipv6only = np->ipv6only; |
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} |
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#endif |
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* Linkage updates. */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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__inet_twsk_hashdance(tw, sk, &dccp_hashinfo); |
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|
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/* Get the TIME_WAIT timeout firing. */ |
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if (timeo < rto) |
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timeo = rto; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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tw->tw_timeout = DCCP_TIMEWAIT_LEN; |
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if (state == DCCP_TIME_WAIT) |
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timeo = DCCP_TIMEWAIT_LEN; |
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|
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inet_twsk_schedule(tw, &dccp_death_row, timeo, |
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DCCP_TIMEWAIT_LEN); |
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inet_twsk_put(tw); |
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} else { |
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/* Sorry, if we're out of memory, just CLOSE this |
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* socket up. We've got bigger problems than |
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89 |
* non-graceful socket closings. |
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*/ |
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DCCP_WARN("time wait bucket table overflow\n"); |
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92 |
} |
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93 |
|
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dccp_done(sk); |
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95 |
} |
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|
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struct sock *dccp_create_openreq_child(struct sock *sk, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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const struct request_sock *req, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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const struct sk_buff *skb) |
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100 |
{ |
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101 |
/* |
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102 |
* Step 3: Process LISTEN state |
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103 |
* |
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* (* Generate a new socket and switch to that socket *) |
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105 |
* Set S := new socket for this port pair |
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106 |
*/ |
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107 |
struct sock *newsk = inet_csk_clone(sk, req, GFP_ATOMIC); |
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108 |
|
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109 |
if (newsk != NULL) { |
2 | 110 |
struct dccp_request_sock *dreq = dccp_rsk(req); |
0
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111 |
struct inet_connection_sock *newicsk = inet_csk(newsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
112 |
struct dccp_sock *newdp = dccp_sk(newsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
113 |
struct dccp_minisock *newdmsk = dccp_msk(newsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
114 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
115 |
newdp->dccps_role = DCCP_ROLE_SERVER; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
116 |
newdp->dccps_hc_rx_ackvec = NULL; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
117 |
newdp->dccps_service_list = NULL; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
118 |
newdp->dccps_service = dreq->dreq_service; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
119 |
newdp->dccps_timestamp_echo = dreq->dreq_timestamp_echo; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
120 |
newdp->dccps_timestamp_time = dreq->dreq_timestamp_time; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
121 |
newicsk->icsk_rto = DCCP_TIMEOUT_INIT; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
122 |
|
2 | 123 |
INIT_LIST_HEAD(&newdp->dccps_featneg); |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
124 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
125 |
* Step 3: Process LISTEN state |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
126 |
* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
127 |
* Choose S.ISS (initial seqno) or set from Init Cookies |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
128 |
* Initialize S.GAR := S.ISS |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
129 |
* Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookies |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
130 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
131 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
132 |
/* See dccp_v4_conn_request */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
133 |
newdmsk->dccpms_sequence_window = req->rcv_wnd; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
134 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
135 |
newdp->dccps_gar = newdp->dccps_iss = dreq->dreq_iss; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
136 |
dccp_update_gss(newsk, dreq->dreq_iss); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
137 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
138 |
newdp->dccps_isr = dreq->dreq_isr; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
139 |
dccp_update_gsr(newsk, dreq->dreq_isr); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
140 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
141 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
142 |
* SWL and AWL are initially adjusted so that they are not less than |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
143 |
* the initial Sequence Numbers received and sent, respectively: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
144 |
* SWL := max(GSR + 1 - floor(W/4), ISR), |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
145 |
* AWL := max(GSS - W' + 1, ISS). |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
146 |
* These adjustments MUST be applied only at the beginning of the |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
147 |
* connection. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
148 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
149 |
dccp_set_seqno(&newdp->dccps_swl, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
150 |
max48(newdp->dccps_swl, newdp->dccps_isr)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
151 |
dccp_set_seqno(&newdp->dccps_awl, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
152 |
max48(newdp->dccps_awl, newdp->dccps_iss)); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
153 |
|
2 | 154 |
/* |
155 |
* Activate features after initialising the sequence numbers, |
|
156 |
* since CCID initialisation may depend on GSS, ISR, ISS etc. |
|
157 |
*/ |
|
158 |
if (dccp_feat_activate_values(newsk, &dreq->dreq_featneg)) { |
|
159 |
/* It is still raw copy of parent, so invalidate |
|
160 |
* destructor and make plain sk_free() */ |
|
161 |
newsk->sk_destruct = NULL; |
|
162 |
sk_free(newsk); |
|
163 |
return NULL; |
|
164 |
} |
|
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
165 |
dccp_init_xmit_timers(newsk); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
166 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
167 |
DCCP_INC_STATS_BH(DCCP_MIB_PASSIVEOPENS); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
168 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
169 |
return newsk; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
170 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
171 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
172 |
EXPORT_SYMBOL_GPL(dccp_create_openreq_child); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
173 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
174 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
175 |
* Process an incoming packet for RESPOND sockets represented |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
176 |
* as an request_sock. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
177 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
178 |
struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
179 |
struct request_sock *req, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
180 |
struct request_sock **prev) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
181 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
182 |
struct sock *child = NULL; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
183 |
struct dccp_request_sock *dreq = dccp_rsk(req); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
184 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
185 |
/* Check for retransmitted REQUEST */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
186 |
if (dccp_hdr(skb)->dccph_type == DCCP_PKT_REQUEST) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
187 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
188 |
if (after48(DCCP_SKB_CB(skb)->dccpd_seq, dreq->dreq_isr)) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
189 |
dccp_pr_debug("Retransmitted REQUEST\n"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
190 |
dreq->dreq_isr = DCCP_SKB_CB(skb)->dccpd_seq; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
191 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
192 |
* Send another RESPONSE packet |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
193 |
* To protect against Request floods, increment retrans |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
194 |
* counter (backoff, monitored by dccp_response_timer). |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
195 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
196 |
req->retrans++; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
197 |
req->rsk_ops->rtx_syn_ack(sk, req); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
198 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
199 |
/* Network Duplicate, discard packet */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
200 |
return NULL; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
201 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
202 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
203 |
DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
204 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
205 |
if (dccp_hdr(skb)->dccph_type != DCCP_PKT_ACK && |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
206 |
dccp_hdr(skb)->dccph_type != DCCP_PKT_DATAACK) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
207 |
goto drop; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
208 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
209 |
/* Invalid ACK */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
210 |
if (DCCP_SKB_CB(skb)->dccpd_ack_seq != dreq->dreq_iss) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
211 |
dccp_pr_debug("Invalid ACK number: ack_seq=%llu, " |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
212 |
"dreq_iss=%llu\n", |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
213 |
(unsigned long long) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
214 |
DCCP_SKB_CB(skb)->dccpd_ack_seq, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
215 |
(unsigned long long) dreq->dreq_iss); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
216 |
goto drop; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
217 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
218 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
219 |
if (dccp_parse_options(sk, dreq, skb)) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
220 |
goto drop; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
221 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
222 |
child = inet_csk(sk)->icsk_af_ops->syn_recv_sock(sk, skb, req, NULL); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
223 |
if (child == NULL) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
224 |
goto listen_overflow; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
225 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
226 |
inet_csk_reqsk_queue_unlink(sk, req, prev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
227 |
inet_csk_reqsk_queue_removed(sk, req); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
228 |
inet_csk_reqsk_queue_add(sk, req, child); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
229 |
out: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
230 |
return child; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
231 |
listen_overflow: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
232 |
dccp_pr_debug("listen_overflow!\n"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
233 |
DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_TOO_BUSY; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
234 |
drop: |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
235 |
if (dccp_hdr(skb)->dccph_type != DCCP_PKT_RESET) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
236 |
req->rsk_ops->send_reset(sk, skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
237 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
|
238 |
inet_csk_reqsk_queue_drop(sk, req, prev); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
239 |
goto out; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
240 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
241 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
242 |
EXPORT_SYMBOL_GPL(dccp_check_req); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
243 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
244 |
/* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
245 |
* Queue segment on the new socket if the new socket is active, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
246 |
* otherwise we just shortcircuit this and continue with |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
247 |
* the new socket. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
248 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
249 |
int dccp_child_process(struct sock *parent, struct sock *child, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
250 |
struct sk_buff *skb) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
251 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
252 |
int ret = 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
253 |
const int state = child->sk_state; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
254 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
255 |
if (!sock_owned_by_user(child)) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
256 |
ret = dccp_rcv_state_process(child, skb, dccp_hdr(skb), |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
257 |
skb->len); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
258 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
259 |
/* Wakeup parent, send SIGIO */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
260 |
if (state == DCCP_RESPOND && child->sk_state != state) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
261 |
parent->sk_data_ready(parent, 0); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
262 |
} else { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
263 |
/* Alas, it is possible again, because we do lookup |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
264 |
* in main socket hash table and lock on listening |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
265 |
* socket does not protect us more. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
266 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
267 |
sk_add_backlog(child, skb); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
268 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
269 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
270 |
bh_unlock_sock(child); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
271 |
sock_put(child); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
272 |
return ret; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
273 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
274 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
275 |
EXPORT_SYMBOL_GPL(dccp_child_process); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
276 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
277 |
void dccp_reqsk_send_ack(struct sock *sk, struct sk_buff *skb, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
278 |
struct request_sock *rsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
279 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
280 |
DCCP_BUG("DCCP-ACK packets are never sent in LISTEN/RESPOND state"); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
281 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
282 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
283 |
EXPORT_SYMBOL_GPL(dccp_reqsk_send_ack); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
284 |
|
2 | 285 |
int dccp_reqsk_init(struct request_sock *req, |
286 |
struct dccp_sock const *dp, struct sk_buff const *skb) |
|
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
287 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
288 |
struct dccp_request_sock *dreq = dccp_rsk(req); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
289 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
290 |
inet_rsk(req)->rmt_port = dccp_hdr(skb)->dccph_sport; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
291 |
inet_rsk(req)->loc_port = dccp_hdr(skb)->dccph_dport; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
292 |
inet_rsk(req)->acked = 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
293 |
req->rcv_wnd = sysctl_dccp_feat_sequence_window; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
294 |
dreq->dreq_timestamp_echo = 0; |
2 | 295 |
|
296 |
/* inherit feature negotiation options from listening socket */ |
|
297 |
return dccp_feat_clone_list(&dp->dccps_featneg, &dreq->dreq_featneg); |
|
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
298 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
299 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
300 |
EXPORT_SYMBOL_GPL(dccp_reqsk_init); |