| /* |
| * 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. |
| */ |
| |
| #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> |
| |
| /* 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; |
| |
| /* 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) |
| { |
| 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) |
| { |
| 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; |
| |
| 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; |
| |
| flag = 0; |
| |
| for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
| pr_debug("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) { |
| pr_debug("Basic checks failed\n"); |
| return 1; |
| } |
| |
| if (map) { |
| set_bit(sch->type, (void *)map); |
| } |
| } |
| |
| pr_debug("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; |
| |
| pr_debug("Chunk type: %d\n", chunk_type); |
| |
| switch (chunk_type) { |
| case SCTP_CID_INIT: |
| pr_debug("SCTP_CID_INIT\n"); |
| i = 0; break; |
| case SCTP_CID_INIT_ACK: |
| pr_debug("SCTP_CID_INIT_ACK\n"); |
| i = 1; break; |
| case SCTP_CID_ABORT: |
| pr_debug("SCTP_CID_ABORT\n"); |
| i = 2; break; |
| case SCTP_CID_SHUTDOWN: |
| pr_debug("SCTP_CID_SHUTDOWN\n"); |
| i = 3; break; |
| case SCTP_CID_SHUTDOWN_ACK: |
| pr_debug("SCTP_CID_SHUTDOWN_ACK\n"); |
| i = 4; break; |
| case SCTP_CID_ERROR: |
| pr_debug("SCTP_CID_ERROR\n"); |
| i = 5; break; |
| case SCTP_CID_COOKIE_ECHO: |
| pr_debug("SCTP_CID_COOKIE_ECHO\n"); |
| i = 6; break; |
| case SCTP_CID_COOKIE_ACK: |
| pr_debug("SCTP_CID_COOKIE_ACK\n"); |
| i = 7; break; |
| case SCTP_CID_SHUTDOWN_COMPLETE: |
| pr_debug("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 */ |
| pr_debug("Unknown chunk type, Will stay in %s\n", |
| sctp_conntrack_names[cur_state]); |
| return cur_state; |
| } |
| |
| pr_debug("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}; |
| |
| 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)])) { |
| pr_debug("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) { |
| pr_debug("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; |
| } |
| pr_debug("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) { |
| pr_debug("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}; |
| |
| 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) { |
| pr_debug("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; |
| |
| pr_debug("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 { |
| pr_debug("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[] = { |
| { |
| .procname = "nf_conntrack_sctp_timeout_closed", |
| .data = &nf_ct_sctp_timeout_closed, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec_jiffies, |
| }, |
| { |
| .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, |
| }, |
| { |
| .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, |
| }, |
| { |
| .procname = "nf_conntrack_sctp_timeout_established", |
| .data = &nf_ct_sctp_timeout_established, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec_jiffies, |
| }, |
| { |
| .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, |
| }, |
| { |
| .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, |
| }, |
| { |
| .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[] = { |
| { |
| .procname = "ip_conntrack_sctp_timeout_closed", |
| .data = &nf_ct_sctp_timeout_closed, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec_jiffies, |
| }, |
| { |
| .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, |
| }, |
| { |
| .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, |
| }, |
| { |
| .procname = "ip_conntrack_sctp_timeout_established", |
| .data = &nf_ct_sctp_timeout_established, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec_jiffies, |
| }, |
| { |
| .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, |
| }, |
| { |
| .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, |
| }, |
| { |
| .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 |
| |
| static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = { |
| .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, |
| #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
| .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
| .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
| .nla_policy = nf_ct_port_nla_policy, |
| #endif |
| #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 |
| }; |
| |
| static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = { |
| .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, |
| #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
| .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
| .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
| .nla_policy = nf_ct_port_nla_policy, |
| #endif |
| #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: |
| 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); |
| } |
| |
| 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"); |