Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/ip.h> |
| 3 | #include <linux/sctp.h> |
| 4 | #include <net/ip.h> |
| 5 | #include <net/ip6_checksum.h> |
| 6 | #include <linux/netfilter.h> |
| 7 | #include <linux/netfilter_ipv4.h> |
| 8 | #include <net/sctp/checksum.h> |
| 9 | #include <net/ip_vs.h> |
| 10 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 11 | static int |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 12 | sctp_conn_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd, |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 13 | int *verdict, struct ip_vs_conn **cpp, |
| 14 | struct ip_vs_iphdr *iph) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 15 | { |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 16 | struct net *net; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 17 | struct ip_vs_service *svc; |
Alexander Frolkin | c6c96c1 | 2013-06-13 08:56:15 +0100 | [diff] [blame] | 18 | struct netns_ipvs *ipvs; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 19 | sctp_chunkhdr_t _schunkh, *sch; |
| 20 | sctp_sctphdr_t *sh, _sctph; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 21 | |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 22 | sh = skb_header_pointer(skb, iph->len, sizeof(_sctph), &_sctph); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 23 | if (sh == NULL) |
| 24 | return 0; |
| 25 | |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 26 | sch = skb_header_pointer(skb, iph->len + sizeof(sctp_sctphdr_t), |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 27 | sizeof(_schunkh), &_schunkh); |
| 28 | if (sch == NULL) |
| 29 | return 0; |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 30 | net = skb_net(skb); |
Alexander Frolkin | c6c96c1 | 2013-06-13 08:56:15 +0100 | [diff] [blame] | 31 | ipvs = net_ipvs(net); |
Julian Anastasov | ceec4c3 | 2013-03-22 11:46:53 +0200 | [diff] [blame] | 32 | rcu_read_lock(); |
Alexander Frolkin | c6c96c1 | 2013-06-13 08:56:15 +0100 | [diff] [blame] | 33 | if ((sch->type == SCTP_CID_INIT || sysctl_sloppy_sctp(ipvs)) && |
Julian Anastasov | ceec4c3 | 2013-03-22 11:46:53 +0200 | [diff] [blame] | 34 | (svc = ip_vs_service_find(net, af, skb->mark, iph->protocol, |
| 35 | &iph->daddr, sh->dest))) { |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 36 | int ignored; |
| 37 | |
Alexander Frolkin | c6c96c1 | 2013-06-13 08:56:15 +0100 | [diff] [blame] | 38 | if (ip_vs_todrop(ipvs)) { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 39 | /* |
| 40 | * It seems that we are very loaded. |
| 41 | * We have to drop this packet :( |
| 42 | */ |
Julian Anastasov | ceec4c3 | 2013-03-22 11:46:53 +0200 | [diff] [blame] | 43 | rcu_read_unlock(); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 44 | *verdict = NF_DROP; |
| 45 | return 0; |
| 46 | } |
| 47 | /* |
| 48 | * Let the virtual server select a real server for the |
| 49 | * incoming connection, and create a connection entry. |
| 50 | */ |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 51 | *cpp = ip_vs_schedule(svc, skb, pd, &ignored, iph); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 52 | if (!*cpp && ignored <= 0) { |
| 53 | if (!ignored) |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 54 | *verdict = ip_vs_leave(svc, skb, pd, iph); |
Julian Anastasov | ceec4c3 | 2013-03-22 11:46:53 +0200 | [diff] [blame] | 55 | else |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 56 | *verdict = NF_DROP; |
Julian Anastasov | ceec4c3 | 2013-03-22 11:46:53 +0200 | [diff] [blame] | 57 | rcu_read_unlock(); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 58 | return 0; |
| 59 | } |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 60 | } |
Julian Anastasov | ceec4c3 | 2013-03-22 11:46:53 +0200 | [diff] [blame] | 61 | rcu_read_unlock(); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 62 | /* NF_ACCEPT */ |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 63 | return 1; |
| 64 | } |
| 65 | |
Daniel Borkmann | 4b47bc9 | 2013-02-05 17:21:31 +0100 | [diff] [blame] | 66 | static void sctp_nat_csum(struct sk_buff *skb, sctp_sctphdr_t *sctph, |
| 67 | unsigned int sctphoff) |
| 68 | { |
| 69 | __u32 crc32; |
| 70 | struct sk_buff *iter; |
| 71 | |
| 72 | crc32 = sctp_start_cksum((__u8 *)sctph, skb_headlen(skb) - sctphoff); |
| 73 | skb_walk_frags(skb, iter) |
| 74 | crc32 = sctp_update_cksum((u8 *) iter->data, |
| 75 | skb_headlen(iter), crc32); |
| 76 | sctph->checksum = sctp_end_cksum(crc32); |
| 77 | |
| 78 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 79 | } |
| 80 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 81 | static int |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 82 | sctp_snat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| 83 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 84 | { |
| 85 | sctp_sctphdr_t *sctph; |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 86 | unsigned int sctphoff = iph->len; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 87 | |
| 88 | #ifdef CONFIG_IP_VS_IPV6 |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 89 | if (cp->af == AF_INET6 && iph->fragoffs) |
Jesper Dangaard Brouer | 63dca2c | 2012-09-26 14:06:41 +0200 | [diff] [blame] | 90 | return 1; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 91 | #endif |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 92 | |
| 93 | /* csum_check requires unshared skb */ |
| 94 | if (!skb_make_writable(skb, sctphoff + sizeof(*sctph))) |
| 95 | return 0; |
| 96 | |
| 97 | if (unlikely(cp->app != NULL)) { |
| 98 | /* Some checks before mangling */ |
| 99 | if (pp->csum_check && !pp->csum_check(cp->af, skb, pp)) |
| 100 | return 0; |
| 101 | |
| 102 | /* Call application helper if needed */ |
| 103 | if (!ip_vs_app_pkt_out(cp, skb)) |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | sctph = (void *) skb_network_header(skb) + sctphoff; |
| 108 | sctph->source = cp->vport; |
| 109 | |
Daniel Borkmann | 4b47bc9 | 2013-02-05 17:21:31 +0100 | [diff] [blame] | 110 | sctp_nat_csum(skb, sctph, sctphoff); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 111 | |
| 112 | return 1; |
| 113 | } |
| 114 | |
| 115 | static int |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 116 | sctp_dnat_handler(struct sk_buff *skb, struct ip_vs_protocol *pp, |
| 117 | struct ip_vs_conn *cp, struct ip_vs_iphdr *iph) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 118 | { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 119 | sctp_sctphdr_t *sctph; |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 120 | unsigned int sctphoff = iph->len; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 121 | |
| 122 | #ifdef CONFIG_IP_VS_IPV6 |
Jesper Dangaard Brouer | d4383f0 | 2012-09-26 14:07:17 +0200 | [diff] [blame] | 123 | if (cp->af == AF_INET6 && iph->fragoffs) |
Jesper Dangaard Brouer | 63dca2c | 2012-09-26 14:06:41 +0200 | [diff] [blame] | 124 | return 1; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 125 | #endif |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 126 | |
| 127 | /* csum_check requires unshared skb */ |
| 128 | if (!skb_make_writable(skb, sctphoff + sizeof(*sctph))) |
| 129 | return 0; |
| 130 | |
| 131 | if (unlikely(cp->app != NULL)) { |
| 132 | /* Some checks before mangling */ |
| 133 | if (pp->csum_check && !pp->csum_check(cp->af, skb, pp)) |
| 134 | return 0; |
| 135 | |
| 136 | /* Call application helper if needed */ |
Xiaoyu Du | 8a0acaa | 2010-07-09 17:27:47 +0200 | [diff] [blame] | 137 | if (!ip_vs_app_pkt_in(cp, skb)) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | sctph = (void *) skb_network_header(skb) + sctphoff; |
| 142 | sctph->dest = cp->dport; |
| 143 | |
Daniel Borkmann | 4b47bc9 | 2013-02-05 17:21:31 +0100 | [diff] [blame] | 144 | sctp_nat_csum(skb, sctph, sctphoff); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 145 | |
| 146 | return 1; |
| 147 | } |
| 148 | |
| 149 | static int |
| 150 | sctp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp) |
| 151 | { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 152 | unsigned int sctphoff; |
| 153 | struct sctphdr *sh, _sctph; |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 154 | struct sk_buff *iter; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 155 | __le32 cmp; |
| 156 | __le32 val; |
| 157 | __u32 tmp; |
| 158 | |
| 159 | #ifdef CONFIG_IP_VS_IPV6 |
| 160 | if (af == AF_INET6) |
| 161 | sctphoff = sizeof(struct ipv6hdr); |
| 162 | else |
| 163 | #endif |
| 164 | sctphoff = ip_hdrlen(skb); |
| 165 | |
| 166 | sh = skb_header_pointer(skb, sctphoff, sizeof(_sctph), &_sctph); |
| 167 | if (sh == NULL) |
| 168 | return 0; |
| 169 | |
| 170 | cmp = sh->checksum; |
| 171 | |
| 172 | tmp = sctp_start_cksum((__u8 *) sh, skb_headlen(skb)); |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 173 | skb_walk_frags(skb, iter) |
| 174 | tmp = sctp_update_cksum((__u8 *) iter->data, |
| 175 | skb_headlen(iter), tmp); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 176 | |
| 177 | val = sctp_end_cksum(tmp); |
| 178 | |
| 179 | if (val != cmp) { |
| 180 | /* CRC failure, dump it. */ |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 181 | IP_VS_DBG_RL_PKT(0, af, pp, skb, 0, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 182 | "Failed checksum for"); |
| 183 | return 0; |
| 184 | } |
| 185 | return 1; |
| 186 | } |
| 187 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 188 | enum ipvs_sctp_event_t { |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 189 | IP_VS_SCTP_DATA = 0, /* DATA, SACK, HEARTBEATs */ |
| 190 | IP_VS_SCTP_INIT, |
| 191 | IP_VS_SCTP_INIT_ACK, |
| 192 | IP_VS_SCTP_COOKIE_ECHO, |
| 193 | IP_VS_SCTP_COOKIE_ACK, |
| 194 | IP_VS_SCTP_SHUTDOWN, |
| 195 | IP_VS_SCTP_SHUTDOWN_ACK, |
| 196 | IP_VS_SCTP_SHUTDOWN_COMPLETE, |
| 197 | IP_VS_SCTP_ERROR, |
| 198 | IP_VS_SCTP_ABORT, |
| 199 | IP_VS_SCTP_EVENT_LAST |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 200 | }; |
| 201 | |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 202 | /* RFC 2960, 3.2 Chunk Field Descriptions */ |
| 203 | static __u8 sctp_events[] = { |
| 204 | [SCTP_CID_DATA] = IP_VS_SCTP_DATA, |
| 205 | [SCTP_CID_INIT] = IP_VS_SCTP_INIT, |
| 206 | [SCTP_CID_INIT_ACK] = IP_VS_SCTP_INIT_ACK, |
| 207 | [SCTP_CID_SACK] = IP_VS_SCTP_DATA, |
| 208 | [SCTP_CID_HEARTBEAT] = IP_VS_SCTP_DATA, |
| 209 | [SCTP_CID_HEARTBEAT_ACK] = IP_VS_SCTP_DATA, |
| 210 | [SCTP_CID_ABORT] = IP_VS_SCTP_ABORT, |
| 211 | [SCTP_CID_SHUTDOWN] = IP_VS_SCTP_SHUTDOWN, |
| 212 | [SCTP_CID_SHUTDOWN_ACK] = IP_VS_SCTP_SHUTDOWN_ACK, |
| 213 | [SCTP_CID_ERROR] = IP_VS_SCTP_ERROR, |
| 214 | [SCTP_CID_COOKIE_ECHO] = IP_VS_SCTP_COOKIE_ECHO, |
| 215 | [SCTP_CID_COOKIE_ACK] = IP_VS_SCTP_COOKIE_ACK, |
| 216 | [SCTP_CID_ECN_ECNE] = IP_VS_SCTP_DATA, |
| 217 | [SCTP_CID_ECN_CWR] = IP_VS_SCTP_DATA, |
| 218 | [SCTP_CID_SHUTDOWN_COMPLETE] = IP_VS_SCTP_SHUTDOWN_COMPLETE, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 219 | }; |
| 220 | |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 221 | /* SCTP States: |
| 222 | * See RFC 2960, 4. SCTP Association State Diagram |
| 223 | * |
| 224 | * New states (not in diagram): |
| 225 | * - INIT1 state: use shorter timeout for dropped INIT packets |
| 226 | * - REJECTED state: use shorter timeout if INIT is rejected with ABORT |
| 227 | * - INIT, COOKIE_SENT, COOKIE_REPLIED, COOKIE states: for better debugging |
| 228 | * |
| 229 | * The states are as seen in real server. In the diagram, INIT1, INIT, |
| 230 | * COOKIE_SENT and COOKIE_REPLIED processing happens in CLOSED state. |
| 231 | * |
| 232 | * States as per packets from client (C) and server (S): |
| 233 | * |
| 234 | * Setup of client connection: |
| 235 | * IP_VS_SCTP_S_INIT1: First C:INIT sent, wait for S:INIT-ACK |
| 236 | * IP_VS_SCTP_S_INIT: Next C:INIT sent, wait for S:INIT-ACK |
| 237 | * IP_VS_SCTP_S_COOKIE_SENT: S:INIT-ACK sent, wait for C:COOKIE-ECHO |
| 238 | * IP_VS_SCTP_S_COOKIE_REPLIED: C:COOKIE-ECHO sent, wait for S:COOKIE-ACK |
| 239 | * |
| 240 | * Setup of server connection: |
| 241 | * IP_VS_SCTP_S_COOKIE_WAIT: S:INIT sent, wait for C:INIT-ACK |
| 242 | * IP_VS_SCTP_S_COOKIE: C:INIT-ACK sent, wait for S:COOKIE-ECHO |
| 243 | * IP_VS_SCTP_S_COOKIE_ECHOED: S:COOKIE-ECHO sent, wait for C:COOKIE-ACK |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 244 | */ |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 245 | |
| 246 | #define sNO IP_VS_SCTP_S_NONE |
| 247 | #define sI1 IP_VS_SCTP_S_INIT1 |
| 248 | #define sIN IP_VS_SCTP_S_INIT |
| 249 | #define sCS IP_VS_SCTP_S_COOKIE_SENT |
| 250 | #define sCR IP_VS_SCTP_S_COOKIE_REPLIED |
| 251 | #define sCW IP_VS_SCTP_S_COOKIE_WAIT |
| 252 | #define sCO IP_VS_SCTP_S_COOKIE |
| 253 | #define sCE IP_VS_SCTP_S_COOKIE_ECHOED |
| 254 | #define sES IP_VS_SCTP_S_ESTABLISHED |
| 255 | #define sSS IP_VS_SCTP_S_SHUTDOWN_SENT |
| 256 | #define sSR IP_VS_SCTP_S_SHUTDOWN_RECEIVED |
| 257 | #define sSA IP_VS_SCTP_S_SHUTDOWN_ACK_SENT |
| 258 | #define sRJ IP_VS_SCTP_S_REJECTED |
| 259 | #define sCL IP_VS_SCTP_S_CLOSED |
| 260 | |
| 261 | static const __u8 sctp_states |
| 262 | [IP_VS_DIR_LAST][IP_VS_SCTP_EVENT_LAST][IP_VS_SCTP_S_LAST] = { |
| 263 | { /* INPUT */ |
| 264 | /* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/ |
| 265 | /* d */{sES, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 266 | /* i */{sI1, sIN, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sIN, sIN}, |
| 267 | /* i_a */{sCW, sCW, sCW, sCS, sCR, sCO, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 268 | /* c_e */{sCR, sIN, sIN, sCR, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 269 | /* c_a */{sES, sI1, sIN, sCS, sCR, sCW, sCO, sES, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 270 | /* s */{sSR, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sSR, sSS, sSR, sSA, sRJ, sCL}, |
| 271 | /* s_a */{sCL, sIN, sIN, sCS, sCR, sCW, sCO, sCE, sES, sCL, sSR, sCL, sRJ, sCL}, |
| 272 | /* s_c */{sCL, sCL, sCL, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sCL, sRJ, sCL}, |
| 273 | /* err */{sCL, sI1, sIN, sCS, sCR, sCW, sCO, sCL, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 274 | /* ab */{sCL, sCL, sCL, sCL, sCL, sRJ, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, |
| 275 | }, |
| 276 | { /* OUTPUT */ |
| 277 | /* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/ |
| 278 | /* d */{sES, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 279 | /* i */{sCW, sCW, sCW, sCW, sCW, sCW, sCW, sCW, sES, sCW, sCW, sCW, sCW, sCW}, |
| 280 | /* i_a */{sCS, sCS, sCS, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 281 | /* c_e */{sCE, sCE, sCE, sCE, sCE, sCE, sCE, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 282 | /* c_a */{sES, sES, sES, sES, sES, sES, sES, sES, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 283 | /* s */{sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSS, sSR, sSA, sRJ, sCL}, |
| 284 | /* s_a */{sSA, sSA, sSA, sSA, sSA, sCW, sCO, sCE, sES, sSA, sSA, sSA, sRJ, sCL}, |
| 285 | /* s_c */{sCL, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 286 | /* err */{sCL, sCL, sCL, sCL, sCL, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 287 | /* ab */{sCL, sRJ, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, |
| 288 | }, |
| 289 | { /* INPUT-ONLY */ |
| 290 | /* sNO, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL*/ |
| 291 | /* d */{sES, sI1, sIN, sCS, sCR, sES, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 292 | /* i */{sI1, sIN, sIN, sIN, sIN, sIN, sCO, sCE, sES, sSS, sSR, sSA, sIN, sIN}, |
| 293 | /* i_a */{sCE, sCE, sCE, sCE, sCE, sCE, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 294 | /* c_e */{sES, sES, sES, sES, sES, sES, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 295 | /* c_a */{sES, sI1, sIN, sES, sES, sCW, sES, sES, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 296 | /* s */{sSR, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sSR, sSS, sSR, sSA, sRJ, sCL}, |
| 297 | /* s_a */{sCL, sIN, sIN, sCS, sCR, sCW, sCO, sCE, sCL, sCL, sSR, sCL, sRJ, sCL}, |
| 298 | /* s_c */{sCL, sCL, sCL, sCL, sCL, sCW, sCO, sCE, sES, sSS, sCL, sCL, sRJ, sCL}, |
| 299 | /* err */{sCL, sI1, sIN, sCS, sCR, sCW, sCO, sCE, sES, sSS, sSR, sSA, sRJ, sCL}, |
| 300 | /* ab */{sCL, sCL, sCL, sCL, sCL, sRJ, sCL, sCL, sCL, sCL, sCL, sCL, sCL, sCL}, |
| 301 | }, |
| 302 | }; |
| 303 | |
| 304 | #define IP_VS_SCTP_MAX_RTO ((60 + 1) * HZ) |
| 305 | |
| 306 | /* Timeout table[state] */ |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 307 | static const int sctp_timeouts[IP_VS_SCTP_S_LAST + 1] = { |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 308 | [IP_VS_SCTP_S_NONE] = 2 * HZ, |
| 309 | [IP_VS_SCTP_S_INIT1] = (0 + 3 + 1) * HZ, |
| 310 | [IP_VS_SCTP_S_INIT] = IP_VS_SCTP_MAX_RTO, |
| 311 | [IP_VS_SCTP_S_COOKIE_SENT] = IP_VS_SCTP_MAX_RTO, |
| 312 | [IP_VS_SCTP_S_COOKIE_REPLIED] = IP_VS_SCTP_MAX_RTO, |
| 313 | [IP_VS_SCTP_S_COOKIE_WAIT] = IP_VS_SCTP_MAX_RTO, |
| 314 | [IP_VS_SCTP_S_COOKIE] = IP_VS_SCTP_MAX_RTO, |
| 315 | [IP_VS_SCTP_S_COOKIE_ECHOED] = IP_VS_SCTP_MAX_RTO, |
| 316 | [IP_VS_SCTP_S_ESTABLISHED] = 15 * 60 * HZ, |
| 317 | [IP_VS_SCTP_S_SHUTDOWN_SENT] = IP_VS_SCTP_MAX_RTO, |
| 318 | [IP_VS_SCTP_S_SHUTDOWN_RECEIVED] = IP_VS_SCTP_MAX_RTO, |
| 319 | [IP_VS_SCTP_S_SHUTDOWN_ACK_SENT] = IP_VS_SCTP_MAX_RTO, |
| 320 | [IP_VS_SCTP_S_REJECTED] = (0 + 3 + 1) * HZ, |
| 321 | [IP_VS_SCTP_S_CLOSED] = IP_VS_SCTP_MAX_RTO, |
| 322 | [IP_VS_SCTP_S_LAST] = 2 * HZ, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 323 | }; |
| 324 | |
| 325 | static const char *sctp_state_name_table[IP_VS_SCTP_S_LAST + 1] = { |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 326 | [IP_VS_SCTP_S_NONE] = "NONE", |
| 327 | [IP_VS_SCTP_S_INIT1] = "INIT1", |
| 328 | [IP_VS_SCTP_S_INIT] = "INIT", |
| 329 | [IP_VS_SCTP_S_COOKIE_SENT] = "C-SENT", |
| 330 | [IP_VS_SCTP_S_COOKIE_REPLIED] = "C-REPLIED", |
| 331 | [IP_VS_SCTP_S_COOKIE_WAIT] = "C-WAIT", |
| 332 | [IP_VS_SCTP_S_COOKIE] = "COOKIE", |
| 333 | [IP_VS_SCTP_S_COOKIE_ECHOED] = "C-ECHOED", |
| 334 | [IP_VS_SCTP_S_ESTABLISHED] = "ESTABLISHED", |
| 335 | [IP_VS_SCTP_S_SHUTDOWN_SENT] = "S-SENT", |
| 336 | [IP_VS_SCTP_S_SHUTDOWN_RECEIVED] = "S-RECEIVED", |
| 337 | [IP_VS_SCTP_S_SHUTDOWN_ACK_SENT] = "S-ACK-SENT", |
| 338 | [IP_VS_SCTP_S_REJECTED] = "REJECTED", |
| 339 | [IP_VS_SCTP_S_CLOSED] = "CLOSED", |
| 340 | [IP_VS_SCTP_S_LAST] = "BUG!", |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 341 | }; |
| 342 | |
| 343 | |
| 344 | static const char *sctp_state_name(int state) |
| 345 | { |
| 346 | if (state >= IP_VS_SCTP_S_LAST) |
| 347 | return "ERR!"; |
| 348 | if (sctp_state_name_table[state]) |
| 349 | return sctp_state_name_table[state]; |
| 350 | return "?"; |
| 351 | } |
| 352 | |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 353 | static inline void |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 354 | set_sctp_state(struct ip_vs_proto_data *pd, struct ip_vs_conn *cp, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 355 | int direction, const struct sk_buff *skb) |
| 356 | { |
| 357 | sctp_chunkhdr_t _sctpch, *sch; |
| 358 | unsigned char chunk_type; |
| 359 | int event, next_state; |
Julian Anastasov | cf2e394 | 2013-03-09 23:25:06 +0200 | [diff] [blame] | 360 | int ihl, cofs; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 361 | |
| 362 | #ifdef CONFIG_IP_VS_IPV6 |
| 363 | ihl = cp->af == AF_INET ? ip_hdrlen(skb) : sizeof(struct ipv6hdr); |
| 364 | #else |
| 365 | ihl = ip_hdrlen(skb); |
| 366 | #endif |
| 367 | |
Julian Anastasov | cf2e394 | 2013-03-09 23:25:06 +0200 | [diff] [blame] | 368 | cofs = ihl + sizeof(sctp_sctphdr_t); |
| 369 | sch = skb_header_pointer(skb, cofs, sizeof(_sctpch), &_sctpch); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 370 | if (sch == NULL) |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 371 | return; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 372 | |
| 373 | chunk_type = sch->type; |
| 374 | /* |
| 375 | * Section 3: Multiple chunks can be bundled into one SCTP packet |
| 376 | * up to the MTU size, except for the INIT, INIT ACK, and |
| 377 | * SHUTDOWN COMPLETE chunks. These chunks MUST NOT be bundled with |
| 378 | * any other chunk in a packet. |
| 379 | * |
| 380 | * Section 3.3.7: DATA chunks MUST NOT be bundled with ABORT. Control |
| 381 | * chunks (except for INIT, INIT ACK, and SHUTDOWN COMPLETE) MAY be |
| 382 | * bundled with an ABORT, but they MUST be placed before the ABORT |
| 383 | * in the SCTP packet or they will be ignored by the receiver. |
| 384 | */ |
| 385 | if ((sch->type == SCTP_CID_COOKIE_ECHO) || |
| 386 | (sch->type == SCTP_CID_COOKIE_ACK)) { |
Julian Anastasov | cf2e394 | 2013-03-09 23:25:06 +0200 | [diff] [blame] | 387 | int clen = ntohs(sch->length); |
| 388 | |
| 389 | if (clen >= sizeof(sctp_chunkhdr_t)) { |
| 390 | sch = skb_header_pointer(skb, cofs + ALIGN(clen, 4), |
| 391 | sizeof(_sctpch), &_sctpch); |
| 392 | if (sch && sch->type == SCTP_CID_ABORT) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 393 | chunk_type = sch->type; |
| 394 | } |
| 395 | } |
| 396 | |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 397 | event = (chunk_type < sizeof(sctp_events)) ? |
| 398 | sctp_events[chunk_type] : IP_VS_SCTP_DATA; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 399 | |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 400 | /* Update direction to INPUT_ONLY if necessary |
| 401 | * or delete NO_OUTPUT flag if output packet detected |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 402 | */ |
Julian Anastasov | 61e7c42 | 2013-06-18 10:08:07 +0300 | [diff] [blame] | 403 | if (cp->flags & IP_VS_CONN_F_NOOUTPUT) { |
| 404 | if (direction == IP_VS_DIR_OUTPUT) |
| 405 | cp->flags &= ~IP_VS_CONN_F_NOOUTPUT; |
| 406 | else |
| 407 | direction = IP_VS_DIR_INPUT_ONLY; |
| 408 | } |
| 409 | |
| 410 | next_state = sctp_states[direction][event][cp->state]; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 411 | |
| 412 | if (next_state != cp->state) { |
| 413 | struct ip_vs_dest *dest = cp->dest; |
| 414 | |
| 415 | IP_VS_DBG_BUF(8, "%s %s %s:%d->" |
| 416 | "%s:%d state: %s->%s conn->refcnt:%d\n", |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 417 | pd->pp->name, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 418 | ((direction == IP_VS_DIR_OUTPUT) ? |
| 419 | "output " : "input "), |
| 420 | IP_VS_DBG_ADDR(cp->af, &cp->daddr), |
| 421 | ntohs(cp->dport), |
| 422 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 423 | ntohs(cp->cport), |
| 424 | sctp_state_name(cp->state), |
| 425 | sctp_state_name(next_state), |
| 426 | atomic_read(&cp->refcnt)); |
| 427 | if (dest) { |
| 428 | if (!(cp->flags & IP_VS_CONN_F_INACTIVE) && |
| 429 | (next_state != IP_VS_SCTP_S_ESTABLISHED)) { |
| 430 | atomic_dec(&dest->activeconns); |
| 431 | atomic_inc(&dest->inactconns); |
| 432 | cp->flags |= IP_VS_CONN_F_INACTIVE; |
| 433 | } else if ((cp->flags & IP_VS_CONN_F_INACTIVE) && |
| 434 | (next_state == IP_VS_SCTP_S_ESTABLISHED)) { |
| 435 | atomic_inc(&dest->activeconns); |
| 436 | atomic_dec(&dest->inactconns); |
| 437 | cp->flags &= ~IP_VS_CONN_F_INACTIVE; |
| 438 | } |
| 439 | } |
| 440 | } |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 441 | if (likely(pd)) |
| 442 | cp->timeout = pd->timeout_table[cp->state = next_state]; |
| 443 | else /* What to do ? */ |
| 444 | cp->timeout = sctp_timeouts[cp->state = next_state]; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 445 | } |
| 446 | |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 447 | static void |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 448 | sctp_state_transition(struct ip_vs_conn *cp, int direction, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 449 | const struct sk_buff *skb, struct ip_vs_proto_data *pd) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 450 | { |
Julian Anastasov | ac69269 | 2013-03-22 11:46:54 +0200 | [diff] [blame] | 451 | spin_lock_bh(&cp->lock); |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 452 | set_sctp_state(pd, cp, direction, skb); |
Julian Anastasov | ac69269 | 2013-03-22 11:46:54 +0200 | [diff] [blame] | 453 | spin_unlock_bh(&cp->lock); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 454 | } |
| 455 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 456 | static inline __u16 sctp_app_hashkey(__be16 port) |
| 457 | { |
| 458 | return (((__force u16)port >> SCTP_APP_TAB_BITS) ^ (__force u16)port) |
| 459 | & SCTP_APP_TAB_MASK; |
| 460 | } |
| 461 | |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 462 | static int sctp_register_app(struct net *net, struct ip_vs_app *inc) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 463 | { |
| 464 | struct ip_vs_app *i; |
| 465 | __u16 hash; |
| 466 | __be16 port = inc->port; |
| 467 | int ret = 0; |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 468 | struct netns_ipvs *ipvs = net_ipvs(net); |
| 469 | struct ip_vs_proto_data *pd = ip_vs_proto_data_get(net, IPPROTO_SCTP); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 470 | |
| 471 | hash = sctp_app_hashkey(port); |
| 472 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 473 | list_for_each_entry(i, &ipvs->sctp_apps[hash], p_list) { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 474 | if (i->port == port) { |
| 475 | ret = -EEXIST; |
| 476 | goto out; |
| 477 | } |
| 478 | } |
Julian Anastasov | 363c97d | 2013-03-21 11:58:07 +0200 | [diff] [blame] | 479 | list_add_rcu(&inc->p_list, &ipvs->sctp_apps[hash]); |
Hans Schillstrom | 9bbac6a | 2011-01-03 14:44:52 +0100 | [diff] [blame] | 480 | atomic_inc(&pd->appcnt); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 481 | out: |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 482 | |
| 483 | return ret; |
| 484 | } |
| 485 | |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 486 | static void sctp_unregister_app(struct net *net, struct ip_vs_app *inc) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 487 | { |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 488 | struct ip_vs_proto_data *pd = ip_vs_proto_data_get(net, IPPROTO_SCTP); |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 489 | |
Hans Schillstrom | 9bbac6a | 2011-01-03 14:44:52 +0100 | [diff] [blame] | 490 | atomic_dec(&pd->appcnt); |
Julian Anastasov | 363c97d | 2013-03-21 11:58:07 +0200 | [diff] [blame] | 491 | list_del_rcu(&inc->p_list); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | static int sctp_app_conn_bind(struct ip_vs_conn *cp) |
| 495 | { |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 496 | struct netns_ipvs *ipvs = net_ipvs(ip_vs_conn_net(cp)); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 497 | int hash; |
| 498 | struct ip_vs_app *inc; |
| 499 | int result = 0; |
| 500 | |
| 501 | /* Default binding: bind app only for NAT */ |
| 502 | if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ) |
| 503 | return 0; |
| 504 | /* Lookup application incarnations and bind the right one */ |
| 505 | hash = sctp_app_hashkey(cp->vport); |
| 506 | |
Julian Anastasov | 363c97d | 2013-03-21 11:58:07 +0200 | [diff] [blame] | 507 | rcu_read_lock(); |
| 508 | list_for_each_entry_rcu(inc, &ipvs->sctp_apps[hash], p_list) { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 509 | if (inc->port == cp->vport) { |
| 510 | if (unlikely(!ip_vs_app_inc_get(inc))) |
| 511 | break; |
Julian Anastasov | 363c97d | 2013-03-21 11:58:07 +0200 | [diff] [blame] | 512 | rcu_read_unlock(); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 513 | |
| 514 | IP_VS_DBG_BUF(9, "%s: Binding conn %s:%u->" |
| 515 | "%s:%u to app %s on port %u\n", |
| 516 | __func__, |
| 517 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 518 | ntohs(cp->cport), |
| 519 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| 520 | ntohs(cp->vport), |
| 521 | inc->name, ntohs(inc->port)); |
| 522 | cp->app = inc; |
| 523 | if (inc->init_conn) |
| 524 | result = inc->init_conn(inc, cp); |
| 525 | goto out; |
| 526 | } |
| 527 | } |
Julian Anastasov | 363c97d | 2013-03-21 11:58:07 +0200 | [diff] [blame] | 528 | rcu_read_unlock(); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 529 | out: |
| 530 | return result; |
| 531 | } |
| 532 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 533 | /* --------------------------------------------- |
| 534 | * timeouts is netns related now. |
| 535 | * --------------------------------------------- |
| 536 | */ |
Hans Schillstrom | 582b8e3 | 2012-04-26 09:45:35 +0200 | [diff] [blame] | 537 | static int __ip_vs_sctp_init(struct net *net, struct ip_vs_proto_data *pd) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 538 | { |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 539 | struct netns_ipvs *ipvs = net_ipvs(net); |
| 540 | |
| 541 | ip_vs_init_hash_table(ipvs->sctp_apps, SCTP_APP_TAB_SIZE); |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 542 | pd->timeout_table = ip_vs_create_timeout_table((int *)sctp_timeouts, |
| 543 | sizeof(sctp_timeouts)); |
Hans Schillstrom | 582b8e3 | 2012-04-26 09:45:35 +0200 | [diff] [blame] | 544 | if (!pd->timeout_table) |
| 545 | return -ENOMEM; |
| 546 | return 0; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 547 | } |
| 548 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 549 | static void __ip_vs_sctp_exit(struct net *net, struct ip_vs_proto_data *pd) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 550 | { |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 551 | kfree(pd->timeout_table); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | struct ip_vs_protocol ip_vs_protocol_sctp = { |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 555 | .name = "SCTP", |
| 556 | .protocol = IPPROTO_SCTP, |
| 557 | .num_states = IP_VS_SCTP_S_LAST, |
| 558 | .dont_defrag = 0, |
| 559 | .init = NULL, |
| 560 | .exit = NULL, |
| 561 | .init_netns = __ip_vs_sctp_init, |
| 562 | .exit_netns = __ip_vs_sctp_exit, |
| 563 | .register_app = sctp_register_app, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 564 | .unregister_app = sctp_unregister_app, |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 565 | .conn_schedule = sctp_conn_schedule, |
| 566 | .conn_in_get = ip_vs_conn_in_get_proto, |
| 567 | .conn_out_get = ip_vs_conn_out_get_proto, |
| 568 | .snat_handler = sctp_snat_handler, |
| 569 | .dnat_handler = sctp_dnat_handler, |
| 570 | .csum_check = sctp_csum_check, |
| 571 | .state_name = sctp_state_name, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 572 | .state_transition = sctp_state_transition, |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 573 | .app_conn_bind = sctp_app_conn_bind, |
| 574 | .debug_packet = ip_vs_tcpudp_debug_packet, |
| 575 | .timeout_change = NULL, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 576 | }; |