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- /*
- * Connection tracking protocol helper module for SCTP.
- *
- * SCTP is defined in RFC 2960. References to various sections in this code
- * are to this RFC.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 17 Oct 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
- * - enable working with L3 protocol independent connection tracking.
- *
- * Derived from net/ipv4/ip_conntrack_sctp.c
- */
- /*
- * Added support for proc manipulation of timeouts.
- */
- #include <linux/types.h>
- #include <linux/timer.h>
- #include <linux/netfilter.h>
- #include <linux/module.h>
- #include <linux/in.h>
- #include <linux/ip.h>
- #include <linux/sctp.h>
- #include <linux/string.h>
- #include <linux/seq_file.h>
- #include <linux/spinlock.h>
- #include <linux/interrupt.h>
- #include <net/netfilter/nf_conntrack.h>
- #include <net/netfilter/nf_conntrack_l4proto.h>
- #include <net/netfilter/nf_conntrack_ecache.h>
- #if 0
- #define DEBUGP(format, ...) printk(format, ## __VA_ARGS__)
- #else
- #define DEBUGP(format, args...)
- #endif
- /* Protects conntrack->proto.sctp */
- static DEFINE_RWLOCK(sctp_lock);
- /* FIXME: Examine ipfilter's timeouts and conntrack transitions more
- closely. They're more complex. --RR
- And so for me for SCTP :D -Kiran */
- static const char *sctp_conntrack_names[] = {
- "NONE",
- "CLOSED",
- "COOKIE_WAIT",
- "COOKIE_ECHOED",
- "ESTABLISHED",
- "SHUTDOWN_SENT",
- "SHUTDOWN_RECD",
- "SHUTDOWN_ACK_SENT",
- };
- #define SECS * HZ
- #define MINS * 60 SECS
- #define HOURS * 60 MINS
- #define DAYS * 24 HOURS
- static unsigned int nf_ct_sctp_timeout_closed __read_mostly = 10 SECS;
- static unsigned int nf_ct_sctp_timeout_cookie_wait __read_mostly = 3 SECS;
- static unsigned int nf_ct_sctp_timeout_cookie_echoed __read_mostly = 3 SECS;
- static unsigned int nf_ct_sctp_timeout_established __read_mostly = 5 DAYS;
- static unsigned int nf_ct_sctp_timeout_shutdown_sent __read_mostly = 300 SECS / 1000;
- static unsigned int nf_ct_sctp_timeout_shutdown_recd __read_mostly = 300 SECS / 1000;
- static unsigned int nf_ct_sctp_timeout_shutdown_ack_sent __read_mostly = 3 SECS;
- static unsigned int * sctp_timeouts[]
- = { NULL, /* SCTP_CONNTRACK_NONE */
- &nf_ct_sctp_timeout_closed, /* SCTP_CONNTRACK_CLOSED */
- &nf_ct_sctp_timeout_cookie_wait, /* SCTP_CONNTRACK_COOKIE_WAIT */
- &nf_ct_sctp_timeout_cookie_echoed, /* SCTP_CONNTRACK_COOKIE_ECHOED */
- &nf_ct_sctp_timeout_established, /* SCTP_CONNTRACK_ESTABLISHED */
- &nf_ct_sctp_timeout_shutdown_sent, /* SCTP_CONNTRACK_SHUTDOWN_SENT */
- &nf_ct_sctp_timeout_shutdown_recd, /* SCTP_CONNTRACK_SHUTDOWN_RECD */
- &nf_ct_sctp_timeout_shutdown_ack_sent /* SCTP_CONNTRACK_SHUTDOWN_ACK_SENT */
- };
- #define sNO SCTP_CONNTRACK_NONE
- #define sCL SCTP_CONNTRACK_CLOSED
- #define sCW SCTP_CONNTRACK_COOKIE_WAIT
- #define sCE SCTP_CONNTRACK_COOKIE_ECHOED
- #define sES SCTP_CONNTRACK_ESTABLISHED
- #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT
- #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD
- #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT
- #define sIV SCTP_CONNTRACK_MAX
- /*
- These are the descriptions of the states:
- NOTE: These state names are tantalizingly similar to the states of an
- SCTP endpoint. But the interpretation of the states is a little different,
- considering that these are the states of the connection and not of an end
- point. Please note the subtleties. -Kiran
- NONE - Nothing so far.
- COOKIE WAIT - We have seen an INIT chunk in the original direction, or also
- an INIT_ACK chunk in the reply direction.
- COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction.
- ESTABLISHED - We have seen a COOKIE_ACK in the reply direction.
- SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction.
- SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin.
- SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite
- to that of the SHUTDOWN chunk.
- CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of
- the SHUTDOWN chunk. Connection is closed.
- */
- /* TODO
- - I have assumed that the first INIT is in the original direction.
- This messes things when an INIT comes in the reply direction in CLOSED
- state.
- - Check the error type in the reply dir before transitioning from
- cookie echoed to closed.
- - Sec 5.2.4 of RFC 2960
- - Multi Homing support.
- */
- /* SCTP conntrack state transitions */
- static enum sctp_conntrack sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = {
- {
- /* ORIGINAL */
- /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
- /* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA},
- /* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},
- /* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
- /* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA},
- /* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA},
- /* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant have Stale cookie*/
- /* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA},/* 5.2.4 - Big TODO */
- /* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant come in orig dir */
- /* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL}
- },
- {
- /* REPLY */
- /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */
- /* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* INIT in sCL Big TODO */
- /* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},
- /* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL},
- /* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA},
- /* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA},
- /* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA},
- /* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Cant come in reply dir */
- /* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA},
- /* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL}
- }
- };
- static int sctp_pkt_to_tuple(const struct sk_buff *skb,
- unsigned int dataoff,
- struct nf_conntrack_tuple *tuple)
- {
- sctp_sctphdr_t _hdr, *hp;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- /* Actually only need first 8 bytes. */
- hp = skb_header_pointer(skb, dataoff, 8, &_hdr);
- if (hp == NULL)
- return 0;
- tuple->src.u.sctp.port = hp->source;
- tuple->dst.u.sctp.port = hp->dest;
- return 1;
- }
- static int sctp_invert_tuple(struct nf_conntrack_tuple *tuple,
- const struct nf_conntrack_tuple *orig)
- {
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- tuple->src.u.sctp.port = orig->dst.u.sctp.port;
- tuple->dst.u.sctp.port = orig->src.u.sctp.port;
- return 1;
- }
- /* Print out the per-protocol part of the tuple. */
- static int sctp_print_tuple(struct seq_file *s,
- const struct nf_conntrack_tuple *tuple)
- {
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- return seq_printf(s, "sport=%hu dport=%hu ",
- ntohs(tuple->src.u.sctp.port),
- ntohs(tuple->dst.u.sctp.port));
- }
- /* Print out the private part of the conntrack. */
- static int sctp_print_conntrack(struct seq_file *s,
- const struct nf_conn *conntrack)
- {
- enum sctp_conntrack state;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- read_lock_bh(&sctp_lock);
- state = conntrack->proto.sctp.state;
- read_unlock_bh(&sctp_lock);
- return seq_printf(s, "%s ", sctp_conntrack_names[state]);
- }
- #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \
- for (offset = dataoff + sizeof(sctp_sctphdr_t), count = 0; \
- offset < skb->len && \
- (sch = skb_header_pointer(skb, offset, sizeof(_sch), &_sch)); \
- offset += (ntohs(sch->length) + 3) & ~3, count++)
- /* Some validity checks to make sure the chunks are fine */
- static int do_basic_checks(struct nf_conn *conntrack,
- const struct sk_buff *skb,
- unsigned int dataoff,
- char *map)
- {
- u_int32_t offset, count;
- sctp_chunkhdr_t _sch, *sch;
- int flag;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- flag = 0;
- for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
- DEBUGP("Chunk Num: %d Type: %d\n", count, sch->type);
- if (sch->type == SCTP_CID_INIT
- || sch->type == SCTP_CID_INIT_ACK
- || sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
- flag = 1;
- }
- /*
- * Cookie Ack/Echo chunks not the first OR
- * Init / Init Ack / Shutdown compl chunks not the only chunks
- * OR zero-length.
- */
- if (((sch->type == SCTP_CID_COOKIE_ACK
- || sch->type == SCTP_CID_COOKIE_ECHO
- || flag)
- && count !=0) || !sch->length) {
- DEBUGP("Basic checks failed\n");
- return 1;
- }
- if (map) {
- set_bit(sch->type, (void *)map);
- }
- }
- DEBUGP("Basic checks passed\n");
- return count == 0;
- }
- static int new_state(enum ip_conntrack_dir dir,
- enum sctp_conntrack cur_state,
- int chunk_type)
- {
- int i;
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- DEBUGP("Chunk type: %d\n", chunk_type);
- switch (chunk_type) {
- case SCTP_CID_INIT:
- DEBUGP("SCTP_CID_INIT\n");
- i = 0; break;
- case SCTP_CID_INIT_ACK:
- DEBUGP("SCTP_CID_INIT_ACK\n");
- i = 1; break;
- case SCTP_CID_ABORT:
- DEBUGP("SCTP_CID_ABORT\n");
- i = 2; break;
- case SCTP_CID_SHUTDOWN:
- DEBUGP("SCTP_CID_SHUTDOWN\n");
- i = 3; break;
- case SCTP_CID_SHUTDOWN_ACK:
- DEBUGP("SCTP_CID_SHUTDOWN_ACK\n");
- i = 4; break;
- case SCTP_CID_ERROR:
- DEBUGP("SCTP_CID_ERROR\n");
- i = 5; break;
- case SCTP_CID_COOKIE_ECHO:
- DEBUGP("SCTP_CID_COOKIE_ECHO\n");
- i = 6; break;
- case SCTP_CID_COOKIE_ACK:
- DEBUGP("SCTP_CID_COOKIE_ACK\n");
- i = 7; break;
- case SCTP_CID_SHUTDOWN_COMPLETE:
- DEBUGP("SCTP_CID_SHUTDOWN_COMPLETE\n");
- i = 8; break;
- default:
- /* Other chunks like DATA, SACK, HEARTBEAT and
- its ACK do not cause a change in state */
- DEBUGP("Unknown chunk type, Will stay in %s\n",
- sctp_conntrack_names[cur_state]);
- return cur_state;
- }
- DEBUGP("dir: %d cur_state: %s chunk_type: %d new_state: %s\n",
- dir, sctp_conntrack_names[cur_state], chunk_type,
- sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]);
- return sctp_conntracks[dir][i][cur_state];
- }
- /* Returns verdict for packet, or -1 for invalid. */
- static int sctp_packet(struct nf_conn *conntrack,
- const struct sk_buff *skb,
- unsigned int dataoff,
- enum ip_conntrack_info ctinfo,
- int pf,
- unsigned int hooknum)
- {
- enum sctp_conntrack newconntrack, oldsctpstate;
- sctp_sctphdr_t _sctph, *sh;
- sctp_chunkhdr_t _sch, *sch;
- u_int32_t offset, count;
- char map[256 / sizeof (char)] = {0};
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
- if (sh == NULL)
- return -1;
- if (do_basic_checks(conntrack, skb, dataoff, map) != 0)
- return -1;
- /* Check the verification tag (Sec 8.5) */
- if (!test_bit(SCTP_CID_INIT, (void *)map)
- && !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, (void *)map)
- && !test_bit(SCTP_CID_COOKIE_ECHO, (void *)map)
- && !test_bit(SCTP_CID_ABORT, (void *)map)
- && !test_bit(SCTP_CID_SHUTDOWN_ACK, (void *)map)
- && (sh->vtag != conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
- DEBUGP("Verification tag check failed\n");
- return -1;
- }
- oldsctpstate = newconntrack = SCTP_CONNTRACK_MAX;
- for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
- write_lock_bh(&sctp_lock);
- /* Special cases of Verification tag check (Sec 8.5.1) */
- if (sch->type == SCTP_CID_INIT) {
- /* Sec 8.5.1 (A) */
- if (sh->vtag != 0) {
- write_unlock_bh(&sctp_lock);
- return -1;
- }
- } else if (sch->type == SCTP_CID_ABORT) {
- /* Sec 8.5.1 (B) */
- if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
- && !(sh->vtag == conntrack->proto.sctp.vtag
- [1 - CTINFO2DIR(ctinfo)])) {
- write_unlock_bh(&sctp_lock);
- return -1;
- }
- } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) {
- /* Sec 8.5.1 (C) */
- if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])
- && !(sh->vtag == conntrack->proto.sctp.vtag
- [1 - CTINFO2DIR(ctinfo)]
- && (sch->flags & 1))) {
- write_unlock_bh(&sctp_lock);
- return -1;
- }
- } else if (sch->type == SCTP_CID_COOKIE_ECHO) {
- /* Sec 8.5.1 (D) */
- if (!(sh->vtag == conntrack->proto.sctp.vtag[CTINFO2DIR(ctinfo)])) {
- write_unlock_bh(&sctp_lock);
- return -1;
- }
- }
- oldsctpstate = conntrack->proto.sctp.state;
- newconntrack = new_state(CTINFO2DIR(ctinfo), oldsctpstate, sch->type);
- /* Invalid */
- if (newconntrack == SCTP_CONNTRACK_MAX) {
- DEBUGP("nf_conntrack_sctp: Invalid dir=%i ctype=%u conntrack=%u\n",
- CTINFO2DIR(ctinfo), sch->type, oldsctpstate);
- write_unlock_bh(&sctp_lock);
- return -1;
- }
- /* If it is an INIT or an INIT ACK note down the vtag */
- if (sch->type == SCTP_CID_INIT
- || sch->type == SCTP_CID_INIT_ACK) {
- sctp_inithdr_t _inithdr, *ih;
- ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
- sizeof(_inithdr), &_inithdr);
- if (ih == NULL) {
- write_unlock_bh(&sctp_lock);
- return -1;
- }
- DEBUGP("Setting vtag %x for dir %d\n",
- ih->init_tag, !CTINFO2DIR(ctinfo));
- conntrack->proto.sctp.vtag[!CTINFO2DIR(ctinfo)] = ih->init_tag;
- }
- conntrack->proto.sctp.state = newconntrack;
- if (oldsctpstate != newconntrack)
- nf_conntrack_event_cache(IPCT_PROTOINFO, skb);
- write_unlock_bh(&sctp_lock);
- }
- nf_ct_refresh_acct(conntrack, ctinfo, skb, *sctp_timeouts[newconntrack]);
- if (oldsctpstate == SCTP_CONNTRACK_COOKIE_ECHOED
- && CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY
- && newconntrack == SCTP_CONNTRACK_ESTABLISHED) {
- DEBUGP("Setting assured bit\n");
- set_bit(IPS_ASSURED_BIT, &conntrack->status);
- nf_conntrack_event_cache(IPCT_STATUS, skb);
- }
- return NF_ACCEPT;
- }
- /* Called when a new connection for this protocol found. */
- static int sctp_new(struct nf_conn *conntrack, const struct sk_buff *skb,
- unsigned int dataoff)
- {
- enum sctp_conntrack newconntrack;
- sctp_sctphdr_t _sctph, *sh;
- sctp_chunkhdr_t _sch, *sch;
- u_int32_t offset, count;
- char map[256 / sizeof (char)] = {0};
- DEBUGP(__FUNCTION__);
- DEBUGP("\n");
- sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph);
- if (sh == NULL)
- return 0;
- if (do_basic_checks(conntrack, skb, dataoff, map) != 0)
- return 0;
- /* If an OOTB packet has any of these chunks discard (Sec 8.4) */
- if ((test_bit (SCTP_CID_ABORT, (void *)map))
- || (test_bit (SCTP_CID_SHUTDOWN_COMPLETE, (void *)map))
- || (test_bit (SCTP_CID_COOKIE_ACK, (void *)map))) {
- return 0;
- }
- newconntrack = SCTP_CONNTRACK_MAX;
- for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) {
- /* Don't need lock here: this conntrack not in circulation yet */
- newconntrack = new_state(IP_CT_DIR_ORIGINAL,
- SCTP_CONNTRACK_NONE, sch->type);
- /* Invalid: delete conntrack */
- if (newconntrack == SCTP_CONNTRACK_NONE ||
- newconntrack == SCTP_CONNTRACK_MAX) {
- DEBUGP("nf_conntrack_sctp: invalid new deleting.\n");
- return 0;
- }
- /* Copy the vtag into the state info */
- if (sch->type == SCTP_CID_INIT) {
- if (sh->vtag == 0) {
- sctp_inithdr_t _inithdr, *ih;
- ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t),
- sizeof(_inithdr), &_inithdr);
- if (ih == NULL)
- return 0;
- DEBUGP("Setting vtag %x for new conn\n",
- ih->init_tag);
- conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] =
- ih->init_tag;
- } else {
- /* Sec 8.5.1 (A) */
- return 0;
- }
- }
- /* If it is a shutdown ack OOTB packet, we expect a return
- shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */
- else {
- DEBUGP("Setting vtag %x for new conn OOTB\n",
- sh->vtag);
- conntrack->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag;
- }
- conntrack->proto.sctp.state = newconntrack;
- }
- return 1;
- }
- #ifdef CONFIG_SYSCTL
- static unsigned int sctp_sysctl_table_users;
- static struct ctl_table_header *sctp_sysctl_header;
- static struct ctl_table sctp_sysctl_table[] = {
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,
- .procname = "nf_conntrack_sctp_timeout_closed",
- .data = &nf_ct_sctp_timeout_closed,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,
- .procname = "nf_conntrack_sctp_timeout_cookie_wait",
- .data = &nf_ct_sctp_timeout_cookie_wait,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,
- .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
- .data = &nf_ct_sctp_timeout_cookie_echoed,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,
- .procname = "nf_conntrack_sctp_timeout_established",
- .data = &nf_ct_sctp_timeout_established,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,
- .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
- .data = &nf_ct_sctp_timeout_shutdown_sent,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,
- .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
- .data = &nf_ct_sctp_timeout_shutdown_recd,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT,
- .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
- .data = &nf_ct_sctp_timeout_shutdown_ack_sent,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = 0
- }
- };
- #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- static struct ctl_table sctp_compat_sysctl_table[] = {
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED,
- .procname = "ip_conntrack_sctp_timeout_closed",
- .data = &nf_ct_sctp_timeout_closed,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT,
- .procname = "ip_conntrack_sctp_timeout_cookie_wait",
- .data = &nf_ct_sctp_timeout_cookie_wait,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED,
- .procname = "ip_conntrack_sctp_timeout_cookie_echoed",
- .data = &nf_ct_sctp_timeout_cookie_echoed,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED,
- .procname = "ip_conntrack_sctp_timeout_established",
- .data = &nf_ct_sctp_timeout_established,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT,
- .procname = "ip_conntrack_sctp_timeout_shutdown_sent",
- .data = &nf_ct_sctp_timeout_shutdown_sent,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD,
- .procname = "ip_conntrack_sctp_timeout_shutdown_recd",
- .data = &nf_ct_sctp_timeout_shutdown_recd,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT,
- .procname = "ip_conntrack_sctp_timeout_shutdown_ack_sent",
- .data = &nf_ct_sctp_timeout_shutdown_ack_sent,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = &proc_dointvec_jiffies,
- },
- {
- .ctl_name = 0
- }
- };
- #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */
- #endif
- struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 = {
- .l3proto = PF_INET,
- .l4proto = IPPROTO_SCTP,
- .name = "sctp",
- .pkt_to_tuple = sctp_pkt_to_tuple,
- .invert_tuple = sctp_invert_tuple,
- .print_tuple = sctp_print_tuple,
- .print_conntrack = sctp_print_conntrack,
- .packet = sctp_packet,
- .new = sctp_new,
- .me = THIS_MODULE,
- #ifdef CONFIG_SYSCTL
- .ctl_table_users = &sctp_sysctl_table_users,
- .ctl_table_header = &sctp_sysctl_header,
- .ctl_table = sctp_sysctl_table,
- #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT
- .ctl_compat_table = sctp_compat_sysctl_table,
- #endif
- #endif
- };
- struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 = {
- .l3proto = PF_INET6,
- .l4proto = IPPROTO_SCTP,
- .name = "sctp",
- .pkt_to_tuple = sctp_pkt_to_tuple,
- .invert_tuple = sctp_invert_tuple,
- .print_tuple = sctp_print_tuple,
- .print_conntrack = sctp_print_conntrack,
- .packet = sctp_packet,
- .new = sctp_new,
- .me = THIS_MODULE,
- #ifdef CONFIG_SYSCTL
- .ctl_table_users = &sctp_sysctl_table_users,
- .ctl_table_header = &sctp_sysctl_header,
- .ctl_table = sctp_sysctl_table,
- #endif
- };
- int __init nf_conntrack_proto_sctp_init(void)
- {
- int ret;
- ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp4);
- if (ret) {
- printk("nf_conntrack_l4proto_sctp4: protocol register failed\n");
- goto out;
- }
- ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_sctp6);
- if (ret) {
- printk("nf_conntrack_l4proto_sctp6: protocol register failed\n");
- goto cleanup_sctp4;
- }
- return ret;
- cleanup_sctp4:
- nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
- out:
- DEBUGP("SCTP conntrack module loading %s\n",
- ret ? "failed": "succeeded");
- return ret;
- }
- void __exit nf_conntrack_proto_sctp_fini(void)
- {
- nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp6);
- nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_sctp4);
- DEBUGP("SCTP conntrack module unloaded\n");
- }
- module_init(nf_conntrack_proto_sctp_init);
- module_exit(nf_conntrack_proto_sctp_fini);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("Kiran Kumar Immidi");
- MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP");
- MODULE_ALIAS("ip_conntrack_proto_sctp");
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