Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Connection tracking protocol helper module for SCTP. |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 3 | * |
Patrick McHardy | f229f6c | 2013-04-06 15:24:29 +0200 | [diff] [blame] | 4 | * Copyright (c) 2004 Kiran Kumar Immidi <immidi_kiran@yahoo.com> |
| 5 | * Copyright (c) 2004-2012 Patrick McHardy <kaber@trash.net> |
| 6 | * |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 7 | * SCTP is defined in RFC 2960. References to various sections in this code |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 8 | * are to this RFC. |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 9 | * |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 13 | */ |
| 14 | |
| 15 | #include <linux/types.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 16 | #include <linux/timer.h> |
| 17 | #include <linux/netfilter.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/in.h> |
| 20 | #include <linux/ip.h> |
| 21 | #include <linux/sctp.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/seq_file.h> |
Yasuyuki Kozakai | 40a839f | 2006-06-27 03:00:35 -0700 | [diff] [blame] | 24 | #include <linux/spinlock.h> |
| 25 | #include <linux/interrupt.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 26 | |
| 27 | #include <net/netfilter/nf_conntrack.h> |
Martin Josefsson | 605dcad | 2006-11-29 02:35:06 +0100 | [diff] [blame] | 28 | #include <net/netfilter/nf_conntrack_l4proto.h> |
Martin Josefsson | f618012 | 2006-11-29 02:35:01 +0100 | [diff] [blame] | 29 | #include <net/netfilter/nf_conntrack_ecache.h> |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 30 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 31 | /* FIXME: Examine ipfilter's timeouts and conntrack transitions more |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 32 | closely. They're more complex. --RR |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 33 | |
| 34 | And so for me for SCTP :D -Kiran */ |
| 35 | |
Jan Engelhardt | 12c33aa | 2008-04-14 11:15:54 +0200 | [diff] [blame] | 36 | static const char *const sctp_conntrack_names[] = { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 37 | "NONE", |
| 38 | "CLOSED", |
| 39 | "COOKIE_WAIT", |
| 40 | "COOKIE_ECHOED", |
| 41 | "ESTABLISHED", |
| 42 | "SHUTDOWN_SENT", |
| 43 | "SHUTDOWN_RECD", |
| 44 | "SHUTDOWN_ACK_SENT", |
| 45 | }; |
| 46 | |
| 47 | #define SECS * HZ |
| 48 | #define MINS * 60 SECS |
| 49 | #define HOURS * 60 MINS |
| 50 | #define DAYS * 24 HOURS |
| 51 | |
Patrick McHardy | 86c0bf4 | 2008-01-14 23:48:17 -0800 | [diff] [blame] | 52 | static unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] __read_mostly = { |
| 53 | [SCTP_CONNTRACK_CLOSED] = 10 SECS, |
| 54 | [SCTP_CONNTRACK_COOKIE_WAIT] = 3 SECS, |
| 55 | [SCTP_CONNTRACK_COOKIE_ECHOED] = 3 SECS, |
| 56 | [SCTP_CONNTRACK_ESTABLISHED] = 5 DAYS, |
| 57 | [SCTP_CONNTRACK_SHUTDOWN_SENT] = 300 SECS / 1000, |
| 58 | [SCTP_CONNTRACK_SHUTDOWN_RECD] = 300 SECS / 1000, |
| 59 | [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT] = 3 SECS, |
| 60 | }; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 61 | |
| 62 | #define sNO SCTP_CONNTRACK_NONE |
| 63 | #define sCL SCTP_CONNTRACK_CLOSED |
| 64 | #define sCW SCTP_CONNTRACK_COOKIE_WAIT |
| 65 | #define sCE SCTP_CONNTRACK_COOKIE_ECHOED |
| 66 | #define sES SCTP_CONNTRACK_ESTABLISHED |
| 67 | #define sSS SCTP_CONNTRACK_SHUTDOWN_SENT |
| 68 | #define sSR SCTP_CONNTRACK_SHUTDOWN_RECD |
| 69 | #define sSA SCTP_CONNTRACK_SHUTDOWN_ACK_SENT |
| 70 | #define sIV SCTP_CONNTRACK_MAX |
| 71 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 72 | /* |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 73 | These are the descriptions of the states: |
| 74 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 75 | NOTE: These state names are tantalizingly similar to the states of an |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 76 | SCTP endpoint. But the interpretation of the states is a little different, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 77 | considering that these are the states of the connection and not of an end |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 78 | point. Please note the subtleties. -Kiran |
| 79 | |
| 80 | NONE - Nothing so far. |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 81 | COOKIE WAIT - We have seen an INIT chunk in the original direction, or also |
| 82 | an INIT_ACK chunk in the reply direction. |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 83 | COOKIE ECHOED - We have seen a COOKIE_ECHO chunk in the original direction. |
| 84 | ESTABLISHED - We have seen a COOKIE_ACK in the reply direction. |
| 85 | SHUTDOWN_SENT - We have seen a SHUTDOWN chunk in the original direction. |
| 86 | SHUTDOWN_RECD - We have seen a SHUTDOWN chunk in the reply directoin. |
| 87 | SHUTDOWN_ACK_SENT - We have seen a SHUTDOWN_ACK chunk in the direction opposite |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 88 | to that of the SHUTDOWN chunk. |
| 89 | CLOSED - We have seen a SHUTDOWN_COMPLETE chunk in the direction of |
| 90 | the SHUTDOWN chunk. Connection is closed. |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 91 | */ |
| 92 | |
| 93 | /* TODO |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 94 | - I have assumed that the first INIT is in the original direction. |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 95 | This messes things when an INIT comes in the reply direction in CLOSED |
| 96 | state. |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 97 | - Check the error type in the reply dir before transitioning from |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 98 | cookie echoed to closed. |
| 99 | - Sec 5.2.4 of RFC 2960 |
| 100 | - Multi Homing support. |
| 101 | */ |
| 102 | |
| 103 | /* SCTP conntrack state transitions */ |
Patrick McHardy | a5e73c2 | 2008-01-14 23:45:11 -0800 | [diff] [blame] | 104 | static const u8 sctp_conntracks[2][9][SCTP_CONNTRACK_MAX] = { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 105 | { |
| 106 | /* ORIGINAL */ |
| 107 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */ |
| 108 | /* init */ {sCW, sCW, sCW, sCE, sES, sSS, sSR, sSA}, |
| 109 | /* init_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA}, |
| 110 | /* abort */ {sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, |
| 111 | /* shutdown */ {sCL, sCL, sCW, sCE, sSS, sSS, sSR, sSA}, |
| 112 | /* shutdown_ack */ {sSA, sCL, sCW, sCE, sES, sSA, sSA, sSA}, |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 113 | /* error */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Can't have Stale cookie*/ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 114 | /* cookie_echo */ {sCL, sCL, sCE, sCE, sES, sSS, sSR, sSA},/* 5.2.4 - Big TODO */ |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 115 | /* cookie_ack */ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Can't come in orig dir */ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 116 | /* shutdown_comp*/ {sCL, sCL, sCW, sCE, sES, sSS, sSR, sCL} |
| 117 | }, |
| 118 | { |
| 119 | /* REPLY */ |
| 120 | /* sNO, sCL, sCW, sCE, sES, sSS, sSR, sSA */ |
| 121 | /* init */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* INIT in sCL Big TODO */ |
| 122 | /* init_ack */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA}, |
| 123 | /* abort */ {sIV, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, |
| 124 | /* shutdown */ {sIV, sCL, sCW, sCE, sSR, sSS, sSR, sSA}, |
| 125 | /* shutdown_ack */ {sIV, sCL, sCW, sCE, sES, sSA, sSA, sSA}, |
| 126 | /* error */ {sIV, sCL, sCW, sCL, sES, sSS, sSR, sSA}, |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 127 | /* cookie_echo */ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sSA},/* Can't come in reply dir */ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 128 | /* cookie_ack */ {sIV, sCL, sCW, sES, sES, sSS, sSR, sSA}, |
| 129 | /* shutdown_comp*/ {sIV, sCL, sCW, sCE, sES, sSS, sSR, sCL} |
| 130 | } |
| 131 | }; |
| 132 | |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 133 | static int sctp_net_id __read_mostly; |
| 134 | struct sctp_net { |
| 135 | struct nf_proto_net pn; |
| 136 | unsigned int timeouts[SCTP_CONNTRACK_MAX]; |
| 137 | }; |
| 138 | |
| 139 | static inline struct sctp_net *sctp_pernet(struct net *net) |
| 140 | { |
| 141 | return net_generic(net, sctp_net_id); |
| 142 | } |
| 143 | |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 144 | static bool sctp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff, |
| 145 | struct nf_conntrack_tuple *tuple) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 146 | { |
Jan Engelhardt | 12c33aa | 2008-04-14 11:15:54 +0200 | [diff] [blame] | 147 | const struct sctphdr *hp; |
| 148 | struct sctphdr _hdr; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 149 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 150 | /* Actually only need first 8 bytes. */ |
| 151 | hp = skb_header_pointer(skb, dataoff, 8, &_hdr); |
| 152 | if (hp == NULL) |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 153 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 154 | |
| 155 | tuple->src.u.sctp.port = hp->source; |
| 156 | tuple->dst.u.sctp.port = hp->dest; |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 157 | return true; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 158 | } |
| 159 | |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 160 | static bool sctp_invert_tuple(struct nf_conntrack_tuple *tuple, |
| 161 | const struct nf_conntrack_tuple *orig) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 162 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 163 | tuple->src.u.sctp.port = orig->dst.u.sctp.port; |
| 164 | tuple->dst.u.sctp.port = orig->src.u.sctp.port; |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 165 | return true; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | /* Print out the per-protocol part of the tuple. */ |
| 169 | static int sctp_print_tuple(struct seq_file *s, |
| 170 | const struct nf_conntrack_tuple *tuple) |
| 171 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 172 | return seq_printf(s, "sport=%hu dport=%hu ", |
| 173 | ntohs(tuple->src.u.sctp.port), |
| 174 | ntohs(tuple->dst.u.sctp.port)); |
| 175 | } |
| 176 | |
| 177 | /* Print out the private part of the conntrack. */ |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 178 | static int sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 179 | { |
| 180 | enum sctp_conntrack state; |
| 181 | |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 182 | spin_lock_bh(&ct->lock); |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 183 | state = ct->proto.sctp.state; |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 184 | spin_unlock_bh(&ct->lock); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 185 | |
| 186 | return seq_printf(s, "%s ", sctp_conntrack_names[state]); |
| 187 | } |
| 188 | |
| 189 | #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count) \ |
Jan Engelhardt | e79ec50 | 2007-12-17 22:44:06 -0800 | [diff] [blame] | 190 | for ((offset) = (dataoff) + sizeof(sctp_sctphdr_t), (count) = 0; \ |
| 191 | (offset) < (skb)->len && \ |
| 192 | ((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))); \ |
| 193 | (offset) += (ntohs((sch)->length) + 3) & ~3, (count)++) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 194 | |
| 195 | /* Some validity checks to make sure the chunks are fine */ |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 196 | static int do_basic_checks(struct nf_conn *ct, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 197 | const struct sk_buff *skb, |
| 198 | unsigned int dataoff, |
Patrick McHardy | 35c6d3c | 2008-01-14 23:46:05 -0800 | [diff] [blame] | 199 | unsigned long *map) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 200 | { |
| 201 | u_int32_t offset, count; |
| 202 | sctp_chunkhdr_t _sch, *sch; |
| 203 | int flag; |
| 204 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 205 | flag = 0; |
| 206 | |
| 207 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 208 | pr_debug("Chunk Num: %d Type: %d\n", count, sch->type); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 209 | |
Patrick McHardy | 5447d47 | 2008-01-14 23:45:48 -0800 | [diff] [blame] | 210 | if (sch->type == SCTP_CID_INIT || |
| 211 | sch->type == SCTP_CID_INIT_ACK || |
| 212 | sch->type == SCTP_CID_SHUTDOWN_COMPLETE) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 213 | flag = 1; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 214 | |
Patrick McHardy | e17df68 | 2006-05-02 23:23:07 +0200 | [diff] [blame] | 215 | /* |
| 216 | * Cookie Ack/Echo chunks not the first OR |
| 217 | * Init / Init Ack / Shutdown compl chunks not the only chunks |
| 218 | * OR zero-length. |
| 219 | */ |
Patrick McHardy | 5447d47 | 2008-01-14 23:45:48 -0800 | [diff] [blame] | 220 | if (((sch->type == SCTP_CID_COOKIE_ACK || |
| 221 | sch->type == SCTP_CID_COOKIE_ECHO || |
| 222 | flag) && |
| 223 | count != 0) || !sch->length) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 224 | pr_debug("Basic checks failed\n"); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 225 | return 1; |
| 226 | } |
| 227 | |
Patrick McHardy | 5447d47 | 2008-01-14 23:45:48 -0800 | [diff] [blame] | 228 | if (map) |
Patrick McHardy | 35c6d3c | 2008-01-14 23:46:05 -0800 | [diff] [blame] | 229 | set_bit(sch->type, map); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 230 | } |
| 231 | |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 232 | pr_debug("Basic checks passed\n"); |
Patrick McHardy | dd7271f | 2006-06-29 21:40:23 -0700 | [diff] [blame] | 233 | return count == 0; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 234 | } |
| 235 | |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 236 | static int sctp_new_state(enum ip_conntrack_dir dir, |
| 237 | enum sctp_conntrack cur_state, |
| 238 | int chunk_type) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 239 | { |
| 240 | int i; |
| 241 | |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 242 | pr_debug("Chunk type: %d\n", chunk_type); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 243 | |
| 244 | switch (chunk_type) { |
Patrick McHardy | 5447d47 | 2008-01-14 23:45:48 -0800 | [diff] [blame] | 245 | case SCTP_CID_INIT: |
| 246 | pr_debug("SCTP_CID_INIT\n"); |
| 247 | i = 0; |
| 248 | break; |
| 249 | case SCTP_CID_INIT_ACK: |
| 250 | pr_debug("SCTP_CID_INIT_ACK\n"); |
| 251 | i = 1; |
| 252 | break; |
| 253 | case SCTP_CID_ABORT: |
| 254 | pr_debug("SCTP_CID_ABORT\n"); |
| 255 | i = 2; |
| 256 | break; |
| 257 | case SCTP_CID_SHUTDOWN: |
| 258 | pr_debug("SCTP_CID_SHUTDOWN\n"); |
| 259 | i = 3; |
| 260 | break; |
| 261 | case SCTP_CID_SHUTDOWN_ACK: |
| 262 | pr_debug("SCTP_CID_SHUTDOWN_ACK\n"); |
| 263 | i = 4; |
| 264 | break; |
| 265 | case SCTP_CID_ERROR: |
| 266 | pr_debug("SCTP_CID_ERROR\n"); |
| 267 | i = 5; |
| 268 | break; |
| 269 | case SCTP_CID_COOKIE_ECHO: |
| 270 | pr_debug("SCTP_CID_COOKIE_ECHO\n"); |
| 271 | i = 6; |
| 272 | break; |
| 273 | case SCTP_CID_COOKIE_ACK: |
| 274 | pr_debug("SCTP_CID_COOKIE_ACK\n"); |
| 275 | i = 7; |
| 276 | break; |
| 277 | case SCTP_CID_SHUTDOWN_COMPLETE: |
| 278 | pr_debug("SCTP_CID_SHUTDOWN_COMPLETE\n"); |
| 279 | i = 8; |
| 280 | break; |
| 281 | default: |
| 282 | /* Other chunks like DATA, SACK, HEARTBEAT and |
| 283 | its ACK do not cause a change in state */ |
| 284 | pr_debug("Unknown chunk type, Will stay in %s\n", |
| 285 | sctp_conntrack_names[cur_state]); |
| 286 | return cur_state; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 287 | } |
| 288 | |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 289 | pr_debug("dir: %d cur_state: %s chunk_type: %d new_state: %s\n", |
| 290 | dir, sctp_conntrack_names[cur_state], chunk_type, |
| 291 | sctp_conntrack_names[sctp_conntracks[dir][i][cur_state]]); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 292 | |
| 293 | return sctp_conntracks[dir][i][cur_state]; |
| 294 | } |
| 295 | |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 296 | static unsigned int *sctp_get_timeouts(struct net *net) |
| 297 | { |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 298 | return sctp_pernet(net)->timeouts; |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 299 | } |
| 300 | |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 301 | /* Returns verdict for packet, or -NF_ACCEPT for invalid. */ |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 302 | static int sctp_packet(struct nf_conn *ct, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 303 | const struct sk_buff *skb, |
| 304 | unsigned int dataoff, |
| 305 | enum ip_conntrack_info ctinfo, |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 306 | u_int8_t pf, |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 307 | unsigned int hooknum, |
| 308 | unsigned int *timeouts) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 309 | { |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 310 | enum sctp_conntrack new_state, old_state; |
Patrick McHardy | 8528819 | 2008-01-14 23:46:37 -0800 | [diff] [blame] | 311 | enum ip_conntrack_dir dir = CTINFO2DIR(ctinfo); |
Jan Engelhardt | 12c33aa | 2008-04-14 11:15:54 +0200 | [diff] [blame] | 312 | const struct sctphdr *sh; |
| 313 | struct sctphdr _sctph; |
| 314 | const struct sctp_chunkhdr *sch; |
| 315 | struct sctp_chunkhdr _sch; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 316 | u_int32_t offset, count; |
Patrick McHardy | 35c6d3c | 2008-01-14 23:46:05 -0800 | [diff] [blame] | 317 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 318 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 319 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
| 320 | if (sh == NULL) |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 321 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 322 | |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 323 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 324 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 325 | |
| 326 | /* Check the verification tag (Sec 8.5) */ |
Patrick McHardy | 35c6d3c | 2008-01-14 23:46:05 -0800 | [diff] [blame] | 327 | if (!test_bit(SCTP_CID_INIT, map) && |
| 328 | !test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) && |
| 329 | !test_bit(SCTP_CID_COOKIE_ECHO, map) && |
| 330 | !test_bit(SCTP_CID_ABORT, map) && |
| 331 | !test_bit(SCTP_CID_SHUTDOWN_ACK, map) && |
Patrick McHardy | 8528819 | 2008-01-14 23:46:37 -0800 | [diff] [blame] | 332 | sh->vtag != ct->proto.sctp.vtag[dir]) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 333 | pr_debug("Verification tag check failed\n"); |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 334 | goto out; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 335 | } |
| 336 | |
Patrick McHardy | 328bd89 | 2008-11-24 13:44:55 +0100 | [diff] [blame] | 337 | old_state = new_state = SCTP_CONNTRACK_NONE; |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 338 | spin_lock_bh(&ct->lock); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 339 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 340 | /* Special cases of Verification tag check (Sec 8.5.1) */ |
| 341 | if (sch->type == SCTP_CID_INIT) { |
| 342 | /* Sec 8.5.1 (A) */ |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 343 | if (sh->vtag != 0) |
| 344 | goto out_unlock; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 345 | } else if (sch->type == SCTP_CID_ABORT) { |
| 346 | /* Sec 8.5.1 (B) */ |
Patrick McHardy | 8528819 | 2008-01-14 23:46:37 -0800 | [diff] [blame] | 347 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 348 | sh->vtag != ct->proto.sctp.vtag[!dir]) |
| 349 | goto out_unlock; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 350 | } else if (sch->type == SCTP_CID_SHUTDOWN_COMPLETE) { |
| 351 | /* Sec 8.5.1 (C) */ |
Patrick McHardy | 8528819 | 2008-01-14 23:46:37 -0800 | [diff] [blame] | 352 | if (sh->vtag != ct->proto.sctp.vtag[dir] && |
| 353 | sh->vtag != ct->proto.sctp.vtag[!dir] && |
Patrick McHardy | 9b1c2cf | 2008-01-14 23:48:02 -0800 | [diff] [blame] | 354 | sch->flags & SCTP_CHUNK_FLAG_T) |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 355 | goto out_unlock; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 356 | } else if (sch->type == SCTP_CID_COOKIE_ECHO) { |
| 357 | /* Sec 8.5.1 (D) */ |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 358 | if (sh->vtag != ct->proto.sctp.vtag[dir]) |
| 359 | goto out_unlock; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 360 | } |
| 361 | |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 362 | old_state = ct->proto.sctp.state; |
| 363 | new_state = sctp_new_state(dir, old_state, sch->type); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 364 | |
| 365 | /* Invalid */ |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 366 | if (new_state == SCTP_CONNTRACK_MAX) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 367 | pr_debug("nf_conntrack_sctp: Invalid dir=%i ctype=%u " |
| 368 | "conntrack=%u\n", |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 369 | dir, sch->type, old_state); |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 370 | goto out_unlock; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | /* If it is an INIT or an INIT ACK note down the vtag */ |
Patrick McHardy | 5447d47 | 2008-01-14 23:45:48 -0800 | [diff] [blame] | 374 | if (sch->type == SCTP_CID_INIT || |
| 375 | sch->type == SCTP_CID_INIT_ACK) { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 376 | sctp_inithdr_t _inithdr, *ih; |
| 377 | |
| 378 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 379 | sizeof(_inithdr), &_inithdr); |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 380 | if (ih == NULL) |
| 381 | goto out_unlock; |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 382 | pr_debug("Setting vtag %x for dir %d\n", |
Patrick McHardy | 8528819 | 2008-01-14 23:46:37 -0800 | [diff] [blame] | 383 | ih->init_tag, !dir); |
| 384 | ct->proto.sctp.vtag[!dir] = ih->init_tag; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 385 | } |
| 386 | |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 387 | ct->proto.sctp.state = new_state; |
| 388 | if (old_state != new_state) |
Alexey Dobriyan | a71996f | 2008-10-08 11:35:07 +0200 | [diff] [blame] | 389 | nf_conntrack_event_cache(IPCT_PROTOINFO, ct); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 390 | } |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 391 | spin_unlock_bh(&ct->lock); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 392 | |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 393 | nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[new_state]); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 394 | |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 395 | if (old_state == SCTP_CONNTRACK_COOKIE_ECHOED && |
Patrick McHardy | 8528819 | 2008-01-14 23:46:37 -0800 | [diff] [blame] | 396 | dir == IP_CT_DIR_REPLY && |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 397 | new_state == SCTP_CONNTRACK_ESTABLISHED) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 398 | pr_debug("Setting assured bit\n"); |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 399 | set_bit(IPS_ASSURED_BIT, &ct->status); |
Patrick McHardy | 858b3133 | 2010-02-03 13:48:53 +0100 | [diff] [blame] | 400 | nf_conntrack_event_cache(IPCT_ASSURED, ct); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | return NF_ACCEPT; |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 404 | |
| 405 | out_unlock: |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 406 | spin_unlock_bh(&ct->lock); |
Patrick McHardy | b37e933 | 2008-01-14 23:46:52 -0800 | [diff] [blame] | 407 | out: |
| 408 | return -NF_ACCEPT; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | /* Called when a new connection for this protocol found. */ |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 412 | static bool sctp_new(struct nf_conn *ct, const struct sk_buff *skb, |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 413 | unsigned int dataoff, unsigned int *timeouts) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 414 | { |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 415 | enum sctp_conntrack new_state; |
Jan Engelhardt | 12c33aa | 2008-04-14 11:15:54 +0200 | [diff] [blame] | 416 | const struct sctphdr *sh; |
| 417 | struct sctphdr _sctph; |
| 418 | const struct sctp_chunkhdr *sch; |
| 419 | struct sctp_chunkhdr _sch; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 420 | u_int32_t offset, count; |
Patrick McHardy | 35c6d3c | 2008-01-14 23:46:05 -0800 | [diff] [blame] | 421 | unsigned long map[256 / sizeof(unsigned long)] = { 0 }; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 422 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 423 | sh = skb_header_pointer(skb, dataoff, sizeof(_sctph), &_sctph); |
| 424 | if (sh == NULL) |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 425 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 426 | |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 427 | if (do_basic_checks(ct, skb, dataoff, map) != 0) |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 428 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 429 | |
| 430 | /* If an OOTB packet has any of these chunks discard (Sec 8.4) */ |
Patrick McHardy | 35c6d3c | 2008-01-14 23:46:05 -0800 | [diff] [blame] | 431 | if (test_bit(SCTP_CID_ABORT, map) || |
| 432 | test_bit(SCTP_CID_SHUTDOWN_COMPLETE, map) || |
| 433 | test_bit(SCTP_CID_COOKIE_ACK, map)) |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 434 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 435 | |
Changli Gao | e5fc9e7 | 2010-11-12 17:33:17 +0100 | [diff] [blame] | 436 | memset(&ct->proto.sctp, 0, sizeof(ct->proto.sctp)); |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 437 | new_state = SCTP_CONNTRACK_MAX; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 438 | for_each_sctp_chunk (skb, sch, _sch, offset, dataoff, count) { |
| 439 | /* Don't need lock here: this conntrack not in circulation yet */ |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 440 | new_state = sctp_new_state(IP_CT_DIR_ORIGINAL, |
| 441 | SCTP_CONNTRACK_NONE, sch->type); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 442 | |
| 443 | /* Invalid: delete conntrack */ |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 444 | if (new_state == SCTP_CONNTRACK_NONE || |
| 445 | new_state == SCTP_CONNTRACK_MAX) { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 446 | pr_debug("nf_conntrack_sctp: invalid new deleting.\n"); |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 447 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | /* Copy the vtag into the state info */ |
| 451 | if (sch->type == SCTP_CID_INIT) { |
| 452 | if (sh->vtag == 0) { |
| 453 | sctp_inithdr_t _inithdr, *ih; |
| 454 | |
| 455 | ih = skb_header_pointer(skb, offset + sizeof(sctp_chunkhdr_t), |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 456 | sizeof(_inithdr), &_inithdr); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 457 | if (ih == NULL) |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 458 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 459 | |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 460 | pr_debug("Setting vtag %x for new conn\n", |
| 461 | ih->init_tag); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 462 | |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 463 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 464 | ih->init_tag; |
| 465 | } else { |
| 466 | /* Sec 8.5.1 (A) */ |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 467 | return false; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 468 | } |
| 469 | } |
| 470 | /* If it is a shutdown ack OOTB packet, we expect a return |
| 471 | shutdown complete, otherwise an ABORT Sec 8.4 (5) and (8) */ |
| 472 | else { |
Patrick McHardy | 0d53778 | 2007-07-07 22:39:38 -0700 | [diff] [blame] | 473 | pr_debug("Setting vtag %x for new conn OOTB\n", |
| 474 | sh->vtag); |
Patrick McHardy | 112f35c | 2008-01-14 23:46:20 -0800 | [diff] [blame] | 475 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = sh->vtag; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 476 | } |
| 477 | |
Patrick McHardy | efe9f68 | 2008-01-14 23:47:09 -0800 | [diff] [blame] | 478 | ct->proto.sctp.state = new_state; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 479 | } |
| 480 | |
Jan Engelhardt | 09f263c | 2008-04-14 11:15:53 +0200 | [diff] [blame] | 481 | return true; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 482 | } |
| 483 | |
Igor Maravić | c0cd115 | 2011-12-12 02:58:24 +0000 | [diff] [blame] | 484 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 485 | |
| 486 | #include <linux/netfilter/nfnetlink.h> |
| 487 | #include <linux/netfilter/nfnetlink_conntrack.h> |
| 488 | |
| 489 | static int sctp_to_nlattr(struct sk_buff *skb, struct nlattr *nla, |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 490 | struct nf_conn *ct) |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 491 | { |
| 492 | struct nlattr *nest_parms; |
| 493 | |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 494 | spin_lock_bh(&ct->lock); |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 495 | nest_parms = nla_nest_start(skb, CTA_PROTOINFO_SCTP | NLA_F_NESTED); |
| 496 | if (!nest_parms) |
| 497 | goto nla_put_failure; |
| 498 | |
David S. Miller | 5e8d1eb | 2012-04-01 18:51:07 -0400 | [diff] [blame] | 499 | if (nla_put_u8(skb, CTA_PROTOINFO_SCTP_STATE, ct->proto.sctp.state) || |
| 500 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_ORIGINAL, |
| 501 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL]) || |
| 502 | nla_put_be32(skb, CTA_PROTOINFO_SCTP_VTAG_REPLY, |
| 503 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY])) |
| 504 | goto nla_put_failure; |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 505 | |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 506 | spin_unlock_bh(&ct->lock); |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 507 | |
| 508 | nla_nest_end(skb, nest_parms); |
| 509 | |
| 510 | return 0; |
| 511 | |
| 512 | nla_put_failure: |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 513 | spin_unlock_bh(&ct->lock); |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 514 | return -1; |
| 515 | } |
| 516 | |
| 517 | static const struct nla_policy sctp_nla_policy[CTA_PROTOINFO_SCTP_MAX+1] = { |
| 518 | [CTA_PROTOINFO_SCTP_STATE] = { .type = NLA_U8 }, |
| 519 | [CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] = { .type = NLA_U32 }, |
| 520 | [CTA_PROTOINFO_SCTP_VTAG_REPLY] = { .type = NLA_U32 }, |
| 521 | }; |
| 522 | |
| 523 | static int nlattr_to_sctp(struct nlattr *cda[], struct nf_conn *ct) |
| 524 | { |
| 525 | struct nlattr *attr = cda[CTA_PROTOINFO_SCTP]; |
| 526 | struct nlattr *tb[CTA_PROTOINFO_SCTP_MAX+1]; |
| 527 | int err; |
| 528 | |
| 529 | /* updates may not contain the internal protocol info, skip parsing */ |
| 530 | if (!attr) |
| 531 | return 0; |
| 532 | |
| 533 | err = nla_parse_nested(tb, |
| 534 | CTA_PROTOINFO_SCTP_MAX, |
| 535 | attr, |
| 536 | sctp_nla_policy); |
| 537 | if (err < 0) |
| 538 | return err; |
| 539 | |
| 540 | if (!tb[CTA_PROTOINFO_SCTP_STATE] || |
| 541 | !tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL] || |
| 542 | !tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]) |
| 543 | return -EINVAL; |
| 544 | |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 545 | spin_lock_bh(&ct->lock); |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 546 | ct->proto.sctp.state = nla_get_u8(tb[CTA_PROTOINFO_SCTP_STATE]); |
| 547 | ct->proto.sctp.vtag[IP_CT_DIR_ORIGINAL] = |
Patrick McHardy | 5547cd0 | 2008-07-21 10:03:49 -0700 | [diff] [blame] | 548 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_ORIGINAL]); |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 549 | ct->proto.sctp.vtag[IP_CT_DIR_REPLY] = |
Patrick McHardy | 5547cd0 | 2008-07-21 10:03:49 -0700 | [diff] [blame] | 550 | nla_get_be32(tb[CTA_PROTOINFO_SCTP_VTAG_REPLY]); |
Patrick McHardy | 440f0d5 | 2009-06-10 14:32:47 +0200 | [diff] [blame] | 551 | spin_unlock_bh(&ct->lock); |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 552 | |
| 553 | return 0; |
| 554 | } |
Holger Eitzenberger | a400c30 | 2009-03-25 21:53:39 +0100 | [diff] [blame] | 555 | |
| 556 | static int sctp_nlattr_size(void) |
| 557 | { |
| 558 | return nla_total_size(0) /* CTA_PROTOINFO_SCTP */ |
| 559 | + nla_policy_len(sctp_nla_policy, CTA_PROTOINFO_SCTP_MAX + 1); |
| 560 | } |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 561 | #endif |
| 562 | |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 563 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
| 564 | |
| 565 | #include <linux/netfilter/nfnetlink.h> |
| 566 | #include <linux/netfilter/nfnetlink_cttimeout.h> |
| 567 | |
Gao feng | 8264deb | 2012-05-28 21:04:23 +0000 | [diff] [blame] | 568 | static int sctp_timeout_nlattr_to_obj(struct nlattr *tb[], |
| 569 | struct net *net, void *data) |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 570 | { |
| 571 | unsigned int *timeouts = data; |
Gao feng | 8264deb | 2012-05-28 21:04:23 +0000 | [diff] [blame] | 572 | struct sctp_net *sn = sctp_pernet(net); |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 573 | int i; |
| 574 | |
| 575 | /* set default SCTP timeouts. */ |
| 576 | for (i=0; i<SCTP_CONNTRACK_MAX; i++) |
Gao feng | 8264deb | 2012-05-28 21:04:23 +0000 | [diff] [blame] | 577 | timeouts[i] = sn->timeouts[i]; |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 578 | |
| 579 | /* there's a 1:1 mapping between attributes and protocol states. */ |
| 580 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { |
| 581 | if (tb[i]) { |
| 582 | timeouts[i] = ntohl(nla_get_be32(tb[i])) * HZ; |
| 583 | } |
| 584 | } |
| 585 | return 0; |
| 586 | } |
| 587 | |
| 588 | static int |
| 589 | sctp_timeout_obj_to_nlattr(struct sk_buff *skb, const void *data) |
| 590 | { |
| 591 | const unsigned int *timeouts = data; |
| 592 | int i; |
| 593 | |
David S. Miller | 5e8d1eb | 2012-04-01 18:51:07 -0400 | [diff] [blame] | 594 | for (i=CTA_TIMEOUT_SCTP_UNSPEC+1; i<CTA_TIMEOUT_SCTP_MAX+1; i++) { |
| 595 | if (nla_put_be32(skb, i, htonl(timeouts[i] / HZ))) |
| 596 | goto nla_put_failure; |
| 597 | } |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 598 | return 0; |
| 599 | |
| 600 | nla_put_failure: |
| 601 | return -ENOSPC; |
| 602 | } |
| 603 | |
| 604 | static const struct nla_policy |
| 605 | sctp_timeout_nla_policy[CTA_TIMEOUT_SCTP_MAX+1] = { |
| 606 | [CTA_TIMEOUT_SCTP_CLOSED] = { .type = NLA_U32 }, |
| 607 | [CTA_TIMEOUT_SCTP_COOKIE_WAIT] = { .type = NLA_U32 }, |
| 608 | [CTA_TIMEOUT_SCTP_COOKIE_ECHOED] = { .type = NLA_U32 }, |
| 609 | [CTA_TIMEOUT_SCTP_ESTABLISHED] = { .type = NLA_U32 }, |
| 610 | [CTA_TIMEOUT_SCTP_SHUTDOWN_SENT] = { .type = NLA_U32 }, |
| 611 | [CTA_TIMEOUT_SCTP_SHUTDOWN_RECD] = { .type = NLA_U32 }, |
| 612 | [CTA_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = { .type = NLA_U32 }, |
| 613 | }; |
| 614 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ |
| 615 | |
| 616 | |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 617 | #ifdef CONFIG_SYSCTL |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 618 | static struct ctl_table sctp_sysctl_table[] = { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 619 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 620 | .procname = "nf_conntrack_sctp_timeout_closed", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 621 | .maxlen = sizeof(unsigned int), |
| 622 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 623 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 624 | }, |
| 625 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 626 | .procname = "nf_conntrack_sctp_timeout_cookie_wait", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 627 | .maxlen = sizeof(unsigned int), |
| 628 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 629 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 630 | }, |
| 631 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 632 | .procname = "nf_conntrack_sctp_timeout_cookie_echoed", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 633 | .maxlen = sizeof(unsigned int), |
| 634 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 635 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 636 | }, |
| 637 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 638 | .procname = "nf_conntrack_sctp_timeout_established", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 639 | .maxlen = sizeof(unsigned int), |
| 640 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 641 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 642 | }, |
| 643 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 644 | .procname = "nf_conntrack_sctp_timeout_shutdown_sent", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 645 | .maxlen = sizeof(unsigned int), |
| 646 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 647 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 648 | }, |
| 649 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 650 | .procname = "nf_conntrack_sctp_timeout_shutdown_recd", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 651 | .maxlen = sizeof(unsigned int), |
| 652 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 653 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 654 | }, |
| 655 | { |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 656 | .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent", |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 657 | .maxlen = sizeof(unsigned int), |
| 658 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 659 | .proc_handler = proc_dointvec_jiffies, |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 660 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 661 | { } |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 662 | }; |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 663 | |
| 664 | #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT |
| 665 | static struct ctl_table sctp_compat_sysctl_table[] = { |
| 666 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 667 | .procname = "ip_conntrack_sctp_timeout_closed", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 668 | .maxlen = sizeof(unsigned int), |
| 669 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 670 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 671 | }, |
| 672 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 673 | .procname = "ip_conntrack_sctp_timeout_cookie_wait", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 674 | .maxlen = sizeof(unsigned int), |
| 675 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 676 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 677 | }, |
| 678 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 679 | .procname = "ip_conntrack_sctp_timeout_cookie_echoed", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 680 | .maxlen = sizeof(unsigned int), |
| 681 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 682 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 683 | }, |
| 684 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 685 | .procname = "ip_conntrack_sctp_timeout_established", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 686 | .maxlen = sizeof(unsigned int), |
| 687 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 688 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 689 | }, |
| 690 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 691 | .procname = "ip_conntrack_sctp_timeout_shutdown_sent", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 692 | .maxlen = sizeof(unsigned int), |
| 693 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 694 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 695 | }, |
| 696 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 697 | .procname = "ip_conntrack_sctp_timeout_shutdown_recd", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 698 | .maxlen = sizeof(unsigned int), |
| 699 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 700 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 701 | }, |
| 702 | { |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 703 | .procname = "ip_conntrack_sctp_timeout_shutdown_ack_sent", |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 704 | .maxlen = sizeof(unsigned int), |
| 705 | .mode = 0644, |
Alexey Dobriyan | 6d9f239 | 2008-11-03 18:21:05 -0800 | [diff] [blame] | 706 | .proc_handler = proc_dointvec_jiffies, |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 707 | }, |
Eric W. Biederman | f8572d8 | 2009-11-05 13:32:03 -0800 | [diff] [blame] | 708 | { } |
Patrick McHardy | a999e68 | 2006-11-29 02:35:20 +0100 | [diff] [blame] | 709 | }; |
| 710 | #endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 711 | #endif |
| 712 | |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 713 | static int sctp_kmemdup_sysctl_table(struct nf_proto_net *pn, |
| 714 | struct sctp_net *sn) |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 715 | { |
| 716 | #ifdef CONFIG_SYSCTL |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 717 | if (pn->ctl_table) |
| 718 | return 0; |
| 719 | |
| 720 | pn->ctl_table = kmemdup(sctp_sysctl_table, |
| 721 | sizeof(sctp_sysctl_table), |
| 722 | GFP_KERNEL); |
| 723 | if (!pn->ctl_table) |
| 724 | return -ENOMEM; |
| 725 | |
| 726 | pn->ctl_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; |
| 727 | pn->ctl_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; |
| 728 | pn->ctl_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; |
| 729 | pn->ctl_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; |
| 730 | pn->ctl_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; |
| 731 | pn->ctl_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; |
| 732 | pn->ctl_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; |
| 733 | #endif |
| 734 | return 0; |
| 735 | } |
| 736 | |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 737 | static int sctp_kmemdup_compat_sysctl_table(struct nf_proto_net *pn, |
| 738 | struct sctp_net *sn) |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 739 | { |
| 740 | #ifdef CONFIG_SYSCTL |
| 741 | #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 742 | pn->ctl_compat_table = kmemdup(sctp_compat_sysctl_table, |
| 743 | sizeof(sctp_compat_sysctl_table), |
| 744 | GFP_KERNEL); |
| 745 | if (!pn->ctl_compat_table) |
| 746 | return -ENOMEM; |
| 747 | |
| 748 | pn->ctl_compat_table[0].data = &sn->timeouts[SCTP_CONNTRACK_CLOSED]; |
| 749 | pn->ctl_compat_table[1].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_WAIT]; |
| 750 | pn->ctl_compat_table[2].data = &sn->timeouts[SCTP_CONNTRACK_COOKIE_ECHOED]; |
| 751 | pn->ctl_compat_table[3].data = &sn->timeouts[SCTP_CONNTRACK_ESTABLISHED]; |
| 752 | pn->ctl_compat_table[4].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_SENT]; |
| 753 | pn->ctl_compat_table[5].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_RECD]; |
| 754 | pn->ctl_compat_table[6].data = &sn->timeouts[SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]; |
| 755 | #endif |
| 756 | #endif |
| 757 | return 0; |
| 758 | } |
| 759 | |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 760 | static int sctp_init_net(struct net *net, u_int16_t proto) |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 761 | { |
| 762 | int ret; |
| 763 | struct sctp_net *sn = sctp_pernet(net); |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 764 | struct nf_proto_net *pn = &sn->pn; |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 765 | |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 766 | if (!pn->users) { |
| 767 | int i; |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 768 | |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 769 | for (i = 0; i < SCTP_CONNTRACK_MAX; i++) |
| 770 | sn->timeouts[i] = sctp_timeouts[i]; |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 771 | } |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 772 | |
| 773 | if (proto == AF_INET) { |
| 774 | ret = sctp_kmemdup_compat_sysctl_table(pn, sn); |
| 775 | if (ret < 0) |
| 776 | return ret; |
| 777 | |
| 778 | ret = sctp_kmemdup_sysctl_table(pn, sn); |
| 779 | if (ret < 0) |
| 780 | nf_ct_kfree_compat_sysctl_table(pn); |
| 781 | } else |
| 782 | ret = sctp_kmemdup_sysctl_table(pn, sn); |
| 783 | |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 784 | return ret; |
| 785 | } |
| 786 | |
Patrick McHardy | 61075af | 2007-07-14 20:48:19 -0700 | [diff] [blame] | 787 | static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp4 __read_mostly = { |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 788 | .l3proto = PF_INET, |
| 789 | .l4proto = IPPROTO_SCTP, |
| 790 | .name = "sctp", |
| 791 | .pkt_to_tuple = sctp_pkt_to_tuple, |
| 792 | .invert_tuple = sctp_invert_tuple, |
| 793 | .print_tuple = sctp_print_tuple, |
| 794 | .print_conntrack = sctp_print_conntrack, |
| 795 | .packet = sctp_packet, |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 796 | .get_timeouts = sctp_get_timeouts, |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 797 | .new = sctp_new, |
| 798 | .me = THIS_MODULE, |
Igor Maravić | c0cd115 | 2011-12-12 02:58:24 +0000 | [diff] [blame] | 799 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 800 | .to_nlattr = sctp_to_nlattr, |
Holger Eitzenberger | a400c30 | 2009-03-25 21:53:39 +0100 | [diff] [blame] | 801 | .nlattr_size = sctp_nlattr_size, |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 802 | .from_nlattr = nlattr_to_sctp, |
Pablo Neira Ayuso | c7212e9 | 2007-12-17 22:29:02 -0800 | [diff] [blame] | 803 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
Holger Eitzenberger | a400c30 | 2009-03-25 21:53:39 +0100 | [diff] [blame] | 804 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
Pablo Neira Ayuso | c7212e9 | 2007-12-17 22:29:02 -0800 | [diff] [blame] | 805 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
| 806 | .nla_policy = nf_ct_port_nla_policy, |
| 807 | #endif |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 808 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
| 809 | .ctnl_timeout = { |
| 810 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, |
| 811 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, |
| 812 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, |
| 813 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, |
| 814 | .nla_policy = sctp_timeout_nla_policy, |
| 815 | }, |
| 816 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 817 | .net_id = &sctp_net_id, |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 818 | .init_net = sctp_init_net, |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 819 | }; |
| 820 | |
Patrick McHardy | 61075af | 2007-07-14 20:48:19 -0700 | [diff] [blame] | 821 | static struct nf_conntrack_l4proto nf_conntrack_l4proto_sctp6 __read_mostly = { |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 822 | .l3proto = PF_INET6, |
| 823 | .l4proto = IPPROTO_SCTP, |
| 824 | .name = "sctp", |
| 825 | .pkt_to_tuple = sctp_pkt_to_tuple, |
| 826 | .invert_tuple = sctp_invert_tuple, |
| 827 | .print_tuple = sctp_print_tuple, |
| 828 | .print_conntrack = sctp_print_conntrack, |
| 829 | .packet = sctp_packet, |
Pablo Neira Ayuso | 2c8503f | 2012-02-28 18:23:31 +0100 | [diff] [blame] | 830 | .get_timeouts = sctp_get_timeouts, |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 831 | .new = sctp_new, |
| 832 | .me = THIS_MODULE, |
Igor Maravić | c0cd115 | 2011-12-12 02:58:24 +0000 | [diff] [blame] | 833 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 834 | .to_nlattr = sctp_to_nlattr, |
Holger Eitzenberger | a400c30 | 2009-03-25 21:53:39 +0100 | [diff] [blame] | 835 | .nlattr_size = sctp_nlattr_size, |
Pablo Neira Ayuso | a258860 | 2008-06-09 15:56:39 -0700 | [diff] [blame] | 836 | .from_nlattr = nlattr_to_sctp, |
Pablo Neira Ayuso | c7212e9 | 2007-12-17 22:29:02 -0800 | [diff] [blame] | 837 | .tuple_to_nlattr = nf_ct_port_tuple_to_nlattr, |
Holger Eitzenberger | a400c30 | 2009-03-25 21:53:39 +0100 | [diff] [blame] | 838 | .nlattr_tuple_size = nf_ct_port_nlattr_tuple_size, |
Pablo Neira Ayuso | c7212e9 | 2007-12-17 22:29:02 -0800 | [diff] [blame] | 839 | .nlattr_to_tuple = nf_ct_port_nlattr_to_tuple, |
| 840 | .nla_policy = nf_ct_port_nla_policy, |
Pablo Neira Ayuso | 5097846 | 2012-02-28 19:13:48 +0100 | [diff] [blame] | 841 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK_TIMEOUT) |
| 842 | .ctnl_timeout = { |
| 843 | .nlattr_to_obj = sctp_timeout_nlattr_to_obj, |
| 844 | .obj_to_nlattr = sctp_timeout_obj_to_nlattr, |
| 845 | .nlattr_max = CTA_TIMEOUT_SCTP_MAX, |
| 846 | .obj_size = sizeof(unsigned int) * SCTP_CONNTRACK_MAX, |
| 847 | .nla_policy = sctp_timeout_nla_policy, |
| 848 | }, |
| 849 | #endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */ |
Pablo Neira Ayuso | c7212e9 | 2007-12-17 22:29:02 -0800 | [diff] [blame] | 850 | #endif |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 851 | .net_id = &sctp_net_id, |
Gao feng | f42c418 | 2012-06-21 04:36:46 +0000 | [diff] [blame] | 852 | .init_net = sctp_init_net, |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 853 | }; |
| 854 | |
| 855 | static int sctp_net_init(struct net *net) |
| 856 | { |
| 857 | int ret = 0; |
| 858 | |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 859 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp4); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 860 | if (ret < 0) { |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 861 | pr_err("nf_conntrack_sctp4: pernet registration failed.\n"); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 862 | goto out; |
| 863 | } |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 864 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_sctp6); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 865 | if (ret < 0) { |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 866 | pr_err("nf_conntrack_sctp6: pernet registration failed.\n"); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 867 | goto cleanup_sctp4; |
| 868 | } |
| 869 | return 0; |
| 870 | |
| 871 | cleanup_sctp4: |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 872 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 873 | out: |
| 874 | return ret; |
| 875 | } |
| 876 | |
| 877 | static void sctp_net_exit(struct net *net) |
| 878 | { |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 879 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp6); |
| 880 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_sctp4); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 881 | } |
| 882 | |
| 883 | static struct pernet_operations sctp_net_ops = { |
| 884 | .init = sctp_net_init, |
| 885 | .exit = sctp_net_exit, |
| 886 | .id = &sctp_net_id, |
| 887 | .size = sizeof(struct sctp_net), |
Patrick McHardy | 933a41e | 2006-11-29 02:35:18 +0100 | [diff] [blame] | 888 | }; |
| 889 | |
Stephen Hemminger | 2f0d2f1 | 2008-01-31 04:08:10 -0800 | [diff] [blame] | 890 | static int __init nf_conntrack_proto_sctp_init(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 891 | { |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 892 | int ret; |
| 893 | |
Gao feng | 0d98da5 | 2013-03-07 17:20:46 +0000 | [diff] [blame] | 894 | ret = register_pernet_subsys(&sctp_net_ops); |
| 895 | if (ret < 0) |
| 896 | goto out_pernet; |
| 897 | |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 898 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp4); |
| 899 | if (ret < 0) |
| 900 | goto out_sctp4; |
| 901 | |
| 902 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_sctp6); |
| 903 | if (ret < 0) |
| 904 | goto out_sctp6; |
| 905 | |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 906 | return 0; |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 907 | out_sctp6: |
| 908 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4); |
| 909 | out_sctp4: |
Gao feng | 0d98da5 | 2013-03-07 17:20:46 +0000 | [diff] [blame] | 910 | unregister_pernet_subsys(&sctp_net_ops); |
| 911 | out_pernet: |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 912 | return ret; |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 913 | } |
| 914 | |
Stephen Hemminger | 2f0d2f1 | 2008-01-31 04:08:10 -0800 | [diff] [blame] | 915 | static void __exit nf_conntrack_proto_sctp_fini(void) |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 916 | { |
Gao feng | c296bb4 | 2013-01-23 12:51:10 +0100 | [diff] [blame] | 917 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp6); |
| 918 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_sctp4); |
Gao feng | 49d485a3 | 2012-05-28 21:04:18 +0000 | [diff] [blame] | 919 | unregister_pernet_subsys(&sctp_net_ops); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 920 | } |
| 921 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 922 | module_init(nf_conntrack_proto_sctp_init); |
| 923 | module_exit(nf_conntrack_proto_sctp_fini); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 924 | |
| 925 | MODULE_LICENSE("GPL"); |
| 926 | MODULE_AUTHOR("Kiran Kumar Immidi"); |
| 927 | MODULE_DESCRIPTION("Netfilter connection tracking protocol helper for SCTP"); |
Patrick McHardy | d2483dd | 2006-12-02 22:06:05 -0800 | [diff] [blame] | 928 | MODULE_ALIAS("ip_conntrack_proto_sctp"); |