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Diffstat (limited to 'net/dccp/minisocks.c')
-rw-r--r--net/dccp/minisocks.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
deleted file mode 100644
index 662071b249cc..000000000000
--- a/net/dccp/minisocks.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * net/dccp/minisocks.c
- *
- * An implementation of the DCCP protocol
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/dccp.h>
-#include <linux/gfp.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/timer.h>
-
-#include <net/sock.h>
-#include <net/xfrm.h>
-#include <net/inet_timewait_sock.h>
-
-#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(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),
-/* Short-time timewait calendar */
-
- .twcal_hand = -1,
- .twcal_timer = TIMER_INITIALIZER(inet_twdr_twcal_tick, 0,
- (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;
-
- if (dccp_death_row.tw_count < dccp_death_row.sysctl_max_tw_buckets)
- tw = inet_twsk_alloc(sk, state);
-
- if (tw != NULL) {
- const struct inet_connection_sock *icsk = inet_csk(sk);
- const int rto = (icsk->icsk_rto << 2) - (icsk->icsk_rto >> 1);
-#if IS_ENABLED(CONFIG_IPV6)
- 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);
- tw6->tw_v6_daddr = np->daddr;
- tw6->tw_v6_rcv_saddr = np->rcv_saddr;
- tw->tw_ipv6only = np->ipv6only;
- }
-#endif
- /* Linkage updates. */
- __inet_twsk_hashdance(tw, sk, &dccp_hashinfo);
-
- /* Get the TIME_WAIT timeout firing. */
- if (timeo < rto)
- timeo = rto;
-
- tw->tw_timeout = DCCP_TIMEWAIT_LEN;
- if (state == DCCP_TIME_WAIT)
- timeo = DCCP_TIMEWAIT_LEN;
-
- inet_twsk_schedule(tw, &dccp_death_row, timeo,
- DCCP_TIMEWAIT_LEN);
- inet_twsk_put(tw);
- } else {
- /* Sorry, if we're out of memory, just CLOSE this
- * socket up. We've got bigger problems than
- * non-graceful socket closings.
- */
- DCCP_WARN("time wait bucket table overflow\n");
- }
-
- dccp_done(sk);
-}
-
-struct sock *dccp_create_openreq_child(struct sock *sk,
- const struct request_sock *req,
- const struct sk_buff *skb)
-{
- /*
- * Step 3: Process LISTEN state
- *
- * (* Generate a new socket and switch to that socket *)
- * Set S := new socket for this port pair
- */
- struct sock *newsk = inet_csk_clone_lock(sk, req, GFP_ATOMIC);
-
- if (newsk != NULL) {
- 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_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 Cookies
- * Initialize S.GAR := S.ISS
- * Set S.ISR, S.GSR from packet (or Init Cookies)
- *
- * Setting AWL/AWH and SWL/SWH happens as part of the feature
- * activation below, as these windows all depend on the local
- * and remote Sequence Window feature values (7.5.2).
- */
- newdp->dccps_iss = dreq->dreq_iss;
- newdp->dccps_gss = dreq->dreq_gss;
- newdp->dccps_gar = newdp->dccps_iss;
- newdp->dccps_isr = dreq->dreq_isr;
- newdp->dccps_gsr = dreq->dreq_gsr;
-
- /*
- * Activate features: initialise CCIDs, sequence windows 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);
- }
- return newsk;
-}
-
-EXPORT_SYMBOL_GPL(dccp_create_openreq_child);
-
-/*
- * Process an incoming packet for RESPOND sockets represented
- * as an request_sock.
- */
-struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
- struct request_sock *req,
- 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, dreq->dreq_gsr)) {
- dccp_pr_debug("Retransmitted REQUEST\n");
- dreq->dreq_gsr = DCCP_SKB_CB(skb)->dccpd_seq;
- /*
- * Send another RESPONSE packet
- * To protect against Request floods, increment retrans
- * counter (backoff, monitored by dccp_response_timer).
- */
- inet_rtx_syn_ack(sk, req);
- }
- /* Network Duplicate, discard packet */
- return NULL;
- }
-
- DCCP_SKB_CB(skb)->dccpd_reset_code = DCCP_RESET_CODE_PACKET_ERROR;
-
- if (dccp_hdr(skb)->dccph_type != DCCP_PKT_ACK &&
- dccp_hdr(skb)->dccph_type != DCCP_PKT_DATAACK)
- goto drop;
-
- /* Invalid ACK */
- if (!between48(DCCP_SKB_CB(skb)->dccpd_ack_seq,
- dreq->dreq_iss, dreq->dreq_gss)) {
- dccp_pr_debug("Invalid ACK number: ack_seq=%llu, "
- "dreq_iss=%llu, dreq_gss=%llu\n",
- (unsigned long long)
- DCCP_SKB_CB(skb)->dccpd_ack_seq,
- (unsigned long long) dreq->dreq_iss,
- (unsigned long long) dreq->dreq_gss);
- goto drop;
- }
-
- 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;
-
- inet_csk_reqsk_queue_unlink(sk, req, prev);
- inet_csk_reqsk_queue_removed(sk, req);
- inet_csk_reqsk_queue_add(sk, req, child);
-out:
- return child;
-listen_overflow:
- dccp_pr_debug("listen_overflow!\n");
- 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(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
- * the new socket.
- */
-int dccp_child_process(struct sock *parent, struct sock *child,
- struct sk_buff *skb)
-{
- int ret = 0;
- const int state = child->sk_state;
-
- if (!sock_owned_by_user(child)) {
- ret = dccp_rcv_state_process(child, skb, dccp_hdr(skb),
- skb->len);
-
- /* Wakeup parent, send SIGIO */
- if (state == DCCP_RESPOND && child->sk_state != state)
- parent->sk_data_ready(parent, 0);
- } else {
- /* Alas, it is possible again, because we do lookup
- * in main socket hash table and lock on listening
- * socket does not protect us more.
- */
- __sk_add_backlog(child, skb);
- }
-
- bh_unlock_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);
generated by cgit (git 2.34.1) at 2025-12-25 04:22:06 +0000