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, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 13 | int *verdict, struct ip_vs_conn **cpp) |
| 14 | { |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 15 | struct net *net; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 16 | struct ip_vs_service *svc; |
| 17 | sctp_chunkhdr_t _schunkh, *sch; |
| 18 | sctp_sctphdr_t *sh, _sctph; |
| 19 | struct ip_vs_iphdr iph; |
| 20 | |
| 21 | ip_vs_fill_iphdr(af, skb_network_header(skb), &iph); |
| 22 | |
| 23 | sh = skb_header_pointer(skb, iph.len, sizeof(_sctph), &_sctph); |
| 24 | if (sh == NULL) |
| 25 | return 0; |
| 26 | |
| 27 | sch = skb_header_pointer(skb, iph.len + sizeof(sctp_sctphdr_t), |
| 28 | sizeof(_schunkh), &_schunkh); |
| 29 | if (sch == NULL) |
| 30 | return 0; |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 31 | net = skb_net(skb); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 32 | if ((sch->type == SCTP_CID_INIT) && |
Hans Schillstrom | fc72325 | 2011-01-03 14:44:43 +0100 | [diff] [blame] | 33 | (svc = ip_vs_service_get(net, af, skb->mark, iph.protocol, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 34 | &iph.daddr, sh->dest))) { |
Julian Anastasov | 190ecd2 | 2010-10-17 16:24:37 +0300 | [diff] [blame] | 35 | int ignored; |
| 36 | |
Hans Schillstrom | a0840e2 | 2011-01-03 14:44:58 +0100 | [diff] [blame] | 37 | if (ip_vs_todrop(net_ipvs(net))) { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 38 | /* |
| 39 | * It seems that we are very loaded. |
| 40 | * We have to drop this packet :( |
| 41 | */ |
| 42 | ip_vs_service_put(svc); |
| 43 | *verdict = NF_DROP; |
| 44 | return 0; |
| 45 | } |
| 46 | /* |
| 47 | * Let the virtual server select a real server for the |
| 48 | * incoming connection, and create a connection entry. |
| 49 | */ |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 50 | *cpp = ip_vs_schedule(svc, skb, pd, &ignored); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 51 | if (!*cpp && ignored <= 0) { |
| 52 | if (!ignored) |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 53 | *verdict = ip_vs_leave(svc, skb, pd); |
Hans Schillstrom | a5959d5 | 2010-11-19 14:25:10 +0100 | [diff] [blame] | 54 | else { |
| 55 | ip_vs_service_put(svc); |
| 56 | *verdict = NF_DROP; |
| 57 | } |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 58 | return 0; |
| 59 | } |
| 60 | ip_vs_service_put(svc); |
| 61 | } |
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 | |
| 66 | static int |
| 67 | sctp_snat_handler(struct sk_buff *skb, |
| 68 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp) |
| 69 | { |
| 70 | sctp_sctphdr_t *sctph; |
| 71 | unsigned int sctphoff; |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 72 | struct sk_buff *iter; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 73 | __be32 crc32; |
| 74 | |
| 75 | #ifdef CONFIG_IP_VS_IPV6 |
| 76 | if (cp->af == AF_INET6) |
| 77 | sctphoff = sizeof(struct ipv6hdr); |
| 78 | else |
| 79 | #endif |
| 80 | sctphoff = ip_hdrlen(skb); |
| 81 | |
| 82 | /* csum_check requires unshared skb */ |
| 83 | if (!skb_make_writable(skb, sctphoff + sizeof(*sctph))) |
| 84 | return 0; |
| 85 | |
| 86 | if (unlikely(cp->app != NULL)) { |
| 87 | /* Some checks before mangling */ |
| 88 | if (pp->csum_check && !pp->csum_check(cp->af, skb, pp)) |
| 89 | return 0; |
| 90 | |
| 91 | /* Call application helper if needed */ |
| 92 | if (!ip_vs_app_pkt_out(cp, skb)) |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | sctph = (void *) skb_network_header(skb) + sctphoff; |
| 97 | sctph->source = cp->vport; |
| 98 | |
| 99 | /* Calculate the checksum */ |
| 100 | crc32 = sctp_start_cksum((u8 *) sctph, skb_headlen(skb) - sctphoff); |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 101 | skb_walk_frags(skb, iter) |
| 102 | crc32 = sctp_update_cksum((u8 *) iter->data, skb_headlen(iter), |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 103 | crc32); |
| 104 | crc32 = sctp_end_cksum(crc32); |
| 105 | sctph->checksum = crc32; |
| 106 | |
| 107 | return 1; |
| 108 | } |
| 109 | |
| 110 | static int |
| 111 | sctp_dnat_handler(struct sk_buff *skb, |
| 112 | struct ip_vs_protocol *pp, struct ip_vs_conn *cp) |
| 113 | { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 114 | sctp_sctphdr_t *sctph; |
| 115 | unsigned int sctphoff; |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 116 | struct sk_buff *iter; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 117 | __be32 crc32; |
| 118 | |
| 119 | #ifdef CONFIG_IP_VS_IPV6 |
| 120 | if (cp->af == AF_INET6) |
| 121 | sctphoff = sizeof(struct ipv6hdr); |
| 122 | else |
| 123 | #endif |
| 124 | sctphoff = ip_hdrlen(skb); |
| 125 | |
| 126 | /* csum_check requires unshared skb */ |
| 127 | if (!skb_make_writable(skb, sctphoff + sizeof(*sctph))) |
| 128 | return 0; |
| 129 | |
| 130 | if (unlikely(cp->app != NULL)) { |
| 131 | /* Some checks before mangling */ |
| 132 | if (pp->csum_check && !pp->csum_check(cp->af, skb, pp)) |
| 133 | return 0; |
| 134 | |
| 135 | /* Call application helper if needed */ |
Xiaoyu Du | 8a0acaa | 2010-07-09 17:27:47 +0200 | [diff] [blame] | 136 | if (!ip_vs_app_pkt_in(cp, skb)) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | sctph = (void *) skb_network_header(skb) + sctphoff; |
| 141 | sctph->dest = cp->dport; |
| 142 | |
| 143 | /* Calculate the checksum */ |
| 144 | crc32 = sctp_start_cksum((u8 *) sctph, skb_headlen(skb) - sctphoff); |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 145 | skb_walk_frags(skb, iter) |
| 146 | crc32 = sctp_update_cksum((u8 *) iter->data, skb_headlen(iter), |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 147 | crc32); |
| 148 | crc32 = sctp_end_cksum(crc32); |
| 149 | sctph->checksum = crc32; |
| 150 | |
| 151 | return 1; |
| 152 | } |
| 153 | |
| 154 | static int |
| 155 | sctp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp) |
| 156 | { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 157 | unsigned int sctphoff; |
| 158 | struct sctphdr *sh, _sctph; |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 159 | struct sk_buff *iter; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 160 | __le32 cmp; |
| 161 | __le32 val; |
| 162 | __u32 tmp; |
| 163 | |
| 164 | #ifdef CONFIG_IP_VS_IPV6 |
| 165 | if (af == AF_INET6) |
| 166 | sctphoff = sizeof(struct ipv6hdr); |
| 167 | else |
| 168 | #endif |
| 169 | sctphoff = ip_hdrlen(skb); |
| 170 | |
| 171 | sh = skb_header_pointer(skb, sctphoff, sizeof(_sctph), &_sctph); |
| 172 | if (sh == NULL) |
| 173 | return 0; |
| 174 | |
| 175 | cmp = sh->checksum; |
| 176 | |
| 177 | tmp = sctp_start_cksum((__u8 *) sh, skb_headlen(skb)); |
David S. Miller | 13f5bf1 | 2010-10-05 00:27:05 -0700 | [diff] [blame] | 178 | skb_walk_frags(skb, iter) |
| 179 | tmp = sctp_update_cksum((__u8 *) iter->data, |
| 180 | skb_headlen(iter), tmp); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 181 | |
| 182 | val = sctp_end_cksum(tmp); |
| 183 | |
| 184 | if (val != cmp) { |
| 185 | /* CRC failure, dump it. */ |
Julian Anastasov | 0d79641 | 2010-10-17 16:46:17 +0300 | [diff] [blame] | 186 | IP_VS_DBG_RL_PKT(0, af, pp, skb, 0, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 187 | "Failed checksum for"); |
| 188 | return 0; |
| 189 | } |
| 190 | return 1; |
| 191 | } |
| 192 | |
| 193 | struct ipvs_sctp_nextstate { |
| 194 | int next_state; |
| 195 | }; |
| 196 | enum ipvs_sctp_event_t { |
| 197 | IP_VS_SCTP_EVE_DATA_CLI, |
| 198 | IP_VS_SCTP_EVE_DATA_SER, |
| 199 | IP_VS_SCTP_EVE_INIT_CLI, |
| 200 | IP_VS_SCTP_EVE_INIT_SER, |
| 201 | IP_VS_SCTP_EVE_INIT_ACK_CLI, |
| 202 | IP_VS_SCTP_EVE_INIT_ACK_SER, |
| 203 | IP_VS_SCTP_EVE_COOKIE_ECHO_CLI, |
| 204 | IP_VS_SCTP_EVE_COOKIE_ECHO_SER, |
| 205 | IP_VS_SCTP_EVE_COOKIE_ACK_CLI, |
| 206 | IP_VS_SCTP_EVE_COOKIE_ACK_SER, |
| 207 | IP_VS_SCTP_EVE_ABORT_CLI, |
| 208 | IP_VS_SCTP_EVE__ABORT_SER, |
| 209 | IP_VS_SCTP_EVE_SHUT_CLI, |
| 210 | IP_VS_SCTP_EVE_SHUT_SER, |
| 211 | IP_VS_SCTP_EVE_SHUT_ACK_CLI, |
| 212 | IP_VS_SCTP_EVE_SHUT_ACK_SER, |
| 213 | IP_VS_SCTP_EVE_SHUT_COM_CLI, |
| 214 | IP_VS_SCTP_EVE_SHUT_COM_SER, |
| 215 | IP_VS_SCTP_EVE_LAST |
| 216 | }; |
| 217 | |
| 218 | static enum ipvs_sctp_event_t sctp_events[255] = { |
| 219 | IP_VS_SCTP_EVE_DATA_CLI, |
| 220 | IP_VS_SCTP_EVE_INIT_CLI, |
| 221 | IP_VS_SCTP_EVE_INIT_ACK_CLI, |
| 222 | IP_VS_SCTP_EVE_DATA_CLI, |
| 223 | IP_VS_SCTP_EVE_DATA_CLI, |
| 224 | IP_VS_SCTP_EVE_DATA_CLI, |
| 225 | IP_VS_SCTP_EVE_ABORT_CLI, |
| 226 | IP_VS_SCTP_EVE_SHUT_CLI, |
| 227 | IP_VS_SCTP_EVE_SHUT_ACK_CLI, |
| 228 | IP_VS_SCTP_EVE_DATA_CLI, |
| 229 | IP_VS_SCTP_EVE_COOKIE_ECHO_CLI, |
| 230 | IP_VS_SCTP_EVE_COOKIE_ACK_CLI, |
| 231 | IP_VS_SCTP_EVE_DATA_CLI, |
| 232 | IP_VS_SCTP_EVE_DATA_CLI, |
| 233 | IP_VS_SCTP_EVE_SHUT_COM_CLI, |
| 234 | }; |
| 235 | |
| 236 | static struct ipvs_sctp_nextstate |
| 237 | sctp_states_table[IP_VS_SCTP_S_LAST][IP_VS_SCTP_EVE_LAST] = { |
| 238 | /* |
| 239 | * STATE : IP_VS_SCTP_S_NONE |
| 240 | */ |
| 241 | /*next state *//*event */ |
| 242 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 243 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 244 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 245 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 246 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 247 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 248 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 249 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 250 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 251 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 252 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 253 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 254 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 255 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 256 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 257 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 258 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 259 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ }, |
| 260 | }, |
| 261 | /* |
| 262 | * STATE : IP_VS_SCTP_S_INIT_CLI |
| 263 | * Cient sent INIT and is waiting for reply from server(In ECHO_WAIT) |
| 264 | */ |
| 265 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 266 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 267 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 268 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 269 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 270 | {IP_VS_SCTP_S_INIT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 271 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ECHO_CLI */ }, |
| 272 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_ECHO_SER */ }, |
| 273 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 274 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 275 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 276 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 277 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 278 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 279 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 280 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 281 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 282 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 283 | }, |
| 284 | /* |
| 285 | * State : IP_VS_SCTP_S_INIT_SER |
| 286 | * Server sent INIT and waiting for INIT ACK from the client |
| 287 | */ |
| 288 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 289 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 290 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 291 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 292 | {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 293 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 294 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 295 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 296 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 297 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 298 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 299 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 300 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 301 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 302 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 303 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 304 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 305 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 306 | }, |
| 307 | /* |
| 308 | * State : IP_VS_SCTP_S_INIT_ACK_CLI |
| 309 | * Client sent INIT ACK and waiting for ECHO from the server |
| 310 | */ |
| 311 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 312 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 313 | /* |
| 314 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 315 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 316 | * an INIT ACK using the same parameters it sent in its original |
| 317 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 318 | */ |
| 319 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 320 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 321 | /* |
| 322 | * INIT_ACK has been resent by the client, let us stay is in |
| 323 | * the same state |
| 324 | */ |
| 325 | {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 326 | /* |
| 327 | * INIT_ACK sent by the server, close the connection |
| 328 | */ |
| 329 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 330 | /* |
| 331 | * ECHO by client, it should not happen, close the connection |
| 332 | */ |
| 333 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 334 | /* |
| 335 | * ECHO by server, this is what we are expecting, move to ECHO_SER |
| 336 | */ |
| 337 | {IP_VS_SCTP_S_ECHO_SER /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 338 | /* |
| 339 | * COOKIE ACK from client, it should not happen, close the connection |
| 340 | */ |
| 341 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 342 | /* |
| 343 | * Unexpected COOKIE ACK from server, staty in the same state |
| 344 | */ |
| 345 | {IP_VS_SCTP_S_INIT_ACK_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 346 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 347 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 348 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 349 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 350 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 351 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 352 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 353 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 354 | }, |
| 355 | /* |
| 356 | * State : IP_VS_SCTP_S_INIT_ACK_SER |
| 357 | * Server sent INIT ACK and waiting for ECHO from the client |
| 358 | */ |
| 359 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 360 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 361 | /* |
| 362 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 363 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 364 | * an INIT ACK using the same parameters it sent in its original |
| 365 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 366 | */ |
| 367 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 368 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 369 | /* |
| 370 | * Unexpected INIT_ACK by the client, let us close the connection |
| 371 | */ |
| 372 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 373 | /* |
| 374 | * INIT_ACK resent by the server, let us move to same state |
| 375 | */ |
| 376 | {IP_VS_SCTP_S_INIT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 377 | /* |
| 378 | * Client send the ECHO, this is what we are expecting, |
| 379 | * move to ECHO_CLI |
| 380 | */ |
| 381 | {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 382 | /* |
| 383 | * ECHO received from the server, Not sure what to do, |
| 384 | * let us close it |
| 385 | */ |
| 386 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 387 | /* |
| 388 | * COOKIE ACK from client, let us stay in the same state |
| 389 | */ |
| 390 | {IP_VS_SCTP_S_INIT_ACK_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 391 | /* |
| 392 | * COOKIE ACK from server, hmm... this should not happen, lets close |
| 393 | * the connection. |
| 394 | */ |
| 395 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 396 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 397 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 398 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 399 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 400 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 401 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 402 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 403 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 404 | }, |
| 405 | /* |
| 406 | * State : IP_VS_SCTP_S_ECHO_CLI |
| 407 | * Cient sent ECHO and waiting COOKEI ACK from the Server |
| 408 | */ |
| 409 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 410 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 411 | /* |
| 412 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 413 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 414 | * an INIT ACK using the same parameters it sent in its original |
| 415 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 416 | */ |
| 417 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 418 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 419 | /* |
| 420 | * INIT_ACK has been by the client, let us close the connection |
| 421 | */ |
| 422 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 423 | /* |
| 424 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 425 | * “If an INIT ACK is received by an endpoint in any state other |
| 426 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 427 | * INIT ACK chunk”. Stay in the same state |
| 428 | */ |
| 429 | {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 430 | /* |
| 431 | * Client resent the ECHO, let us stay in the same state |
| 432 | */ |
| 433 | {IP_VS_SCTP_S_ECHO_CLI /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 434 | /* |
| 435 | * ECHO received from the server, Not sure what to do, |
| 436 | * let us close it |
| 437 | */ |
| 438 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 439 | /* |
| 440 | * COOKIE ACK from client, this shoud not happen, let's close the |
| 441 | * connection |
| 442 | */ |
| 443 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 444 | /* |
| 445 | * COOKIE ACK from server, this is what we are awaiting,lets move to |
| 446 | * ESTABLISHED. |
| 447 | */ |
| 448 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 449 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 450 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 451 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 452 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 453 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 454 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 455 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 456 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 457 | }, |
| 458 | /* |
| 459 | * State : IP_VS_SCTP_S_ECHO_SER |
| 460 | * Server sent ECHO and waiting COOKEI ACK from the client |
| 461 | */ |
| 462 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 463 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 464 | /* |
| 465 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 466 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 467 | * an INIT ACK using the same parameters it sent in its original |
| 468 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 469 | */ |
| 470 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 471 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 472 | /* |
| 473 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 474 | * “If an INIT ACK is received by an endpoint in any state other |
| 475 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 476 | * INIT ACK chunk”. Stay in the same state |
| 477 | */ |
| 478 | {IP_VS_SCTP_S_ECHO_SER /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 479 | /* |
| 480 | * INIT_ACK has been by the server, let us close the connection |
| 481 | */ |
| 482 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 483 | /* |
| 484 | * Client sent the ECHO, not sure what to do, let's close the |
| 485 | * connection. |
| 486 | */ |
| 487 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 488 | /* |
| 489 | * ECHO resent by the server, stay in the same state |
| 490 | */ |
| 491 | {IP_VS_SCTP_S_ECHO_SER /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 492 | /* |
| 493 | * COOKIE ACK from client, this is what we are expecting, let's move |
| 494 | * to ESTABLISHED. |
| 495 | */ |
| 496 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 497 | /* |
| 498 | * COOKIE ACK from server, this should not happen, lets close the |
| 499 | * connection. |
| 500 | */ |
| 501 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 502 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 503 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 504 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 505 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 506 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 507 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 508 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 509 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 510 | }, |
| 511 | /* |
| 512 | * State : IP_VS_SCTP_S_ESTABLISHED |
| 513 | * Association established |
| 514 | */ |
| 515 | {{IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 516 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 517 | /* |
| 518 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 519 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 520 | * an INIT ACK using the same parameters it sent in its original |
| 521 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 522 | */ |
| 523 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 524 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 525 | /* |
| 526 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 527 | * “If an INIT ACK is received by an endpoint in any state other |
| 528 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 529 | * INIT ACK chunk”. Stay in the same state |
| 530 | */ |
| 531 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 532 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 533 | /* |
| 534 | * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the |
| 535 | * peer and peer shall move to the ESTABISHED. if it doesn't handle |
| 536 | * it will send ERROR chunk. So, stay in the same state |
| 537 | */ |
| 538 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 539 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 540 | /* |
| 541 | * COOKIE ACK from client, not sure what to do stay in the same state |
| 542 | */ |
| 543 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 544 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 545 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 546 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 547 | /* |
| 548 | * SHUTDOWN from the client, move to SHUDDOWN_CLI |
| 549 | */ |
| 550 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 551 | /* |
| 552 | * SHUTDOWN from the server, move to SHUTDOWN_SER |
| 553 | */ |
| 554 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 555 | /* |
| 556 | * client sent SHUDTDOWN_ACK, this should not happen, let's close |
| 557 | * the connection |
| 558 | */ |
| 559 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 560 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 561 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 562 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 563 | }, |
| 564 | /* |
| 565 | * State : IP_VS_SCTP_S_SHUT_CLI |
| 566 | * SHUTDOWN sent from the client, waitinf for SHUT ACK from the server |
| 567 | */ |
| 568 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 569 | * We received the data chuck, keep the state unchanged. I assume |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 570 | * that still data chuncks can be received by both the peers in |
| 571 | * SHUDOWN state |
| 572 | */ |
| 573 | |
| 574 | {{IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 575 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 576 | /* |
| 577 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 578 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 579 | * an INIT ACK using the same parameters it sent in its original |
| 580 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 581 | */ |
| 582 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 583 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 584 | /* |
| 585 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 586 | * “If an INIT ACK is received by an endpoint in any state other |
| 587 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 588 | * INIT ACK chunk”. Stay in the same state |
| 589 | */ |
| 590 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 591 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 592 | /* |
| 593 | * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the |
| 594 | * peer and peer shall move to the ESTABISHED. if it doesn't handle |
| 595 | * it will send ERROR chunk. So, stay in the same state |
| 596 | */ |
| 597 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 598 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 599 | /* |
| 600 | * COOKIE ACK from client, not sure what to do stay in the same state |
| 601 | */ |
| 602 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 603 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 604 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 605 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 606 | /* |
| 607 | * SHUTDOWN resent from the client, move to SHUDDOWN_CLI |
| 608 | */ |
| 609 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 610 | /* |
| 611 | * SHUTDOWN from the server, move to SHUTDOWN_SER |
| 612 | */ |
| 613 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 614 | /* |
| 615 | * client sent SHUDTDOWN_ACK, this should not happen, let's close |
| 616 | * the connection |
| 617 | */ |
| 618 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 619 | /* |
| 620 | * Server sent SHUTDOWN ACK, this is what we are expecting, let's move |
| 621 | * to SHUDOWN_ACK_SER |
| 622 | */ |
| 623 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 624 | /* |
| 625 | * SHUTDOWN COM from client, this should not happen, let's close the |
| 626 | * connection |
| 627 | */ |
| 628 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 629 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 630 | }, |
| 631 | /* |
| 632 | * State : IP_VS_SCTP_S_SHUT_SER |
| 633 | * SHUTDOWN sent from the server, waitinf for SHUTDOWN ACK from client |
| 634 | */ |
| 635 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 636 | * We received the data chuck, keep the state unchanged. I assume |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 637 | * that still data chuncks can be received by both the peers in |
| 638 | * SHUDOWN state |
| 639 | */ |
| 640 | |
| 641 | {{IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 642 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 643 | /* |
| 644 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 645 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 646 | * an INIT ACK using the same parameters it sent in its original |
| 647 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 648 | */ |
| 649 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 650 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 651 | /* |
| 652 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 653 | * “If an INIT ACK is received by an endpoint in any state other |
| 654 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 655 | * INIT ACK chunk”. Stay in the same state |
| 656 | */ |
| 657 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 658 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 659 | /* |
| 660 | * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the |
| 661 | * peer and peer shall move to the ESTABISHED. if it doesn't handle |
| 662 | * it will send ERROR chunk. So, stay in the same state |
| 663 | */ |
| 664 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 665 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 666 | /* |
| 667 | * COOKIE ACK from client, not sure what to do stay in the same state |
| 668 | */ |
| 669 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 670 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 671 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 672 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 673 | /* |
| 674 | * SHUTDOWN resent from the client, move to SHUDDOWN_CLI |
| 675 | */ |
| 676 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 677 | /* |
| 678 | * SHUTDOWN resent from the server, move to SHUTDOWN_SER |
| 679 | */ |
| 680 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 681 | /* |
| 682 | * client sent SHUDTDOWN_ACK, this is what we are expecting, let's |
| 683 | * move to SHUT_ACK_CLI |
| 684 | */ |
| 685 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 686 | /* |
| 687 | * Server sent SHUTDOWN ACK, this should not happen, let's close the |
| 688 | * connection |
| 689 | */ |
| 690 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 691 | /* |
| 692 | * SHUTDOWN COM from client, this should not happen, let's close the |
| 693 | * connection |
| 694 | */ |
| 695 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 696 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 697 | }, |
| 698 | |
| 699 | /* |
| 700 | * State : IP_VS_SCTP_S_SHUT_ACK_CLI |
| 701 | * SHUTDOWN ACK from the client, awaiting for SHUTDOWN COM from server |
| 702 | */ |
| 703 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 704 | * We received the data chuck, keep the state unchanged. I assume |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 705 | * that still data chuncks can be received by both the peers in |
| 706 | * SHUDOWN state |
| 707 | */ |
| 708 | |
| 709 | {{IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 710 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 711 | /* |
| 712 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 713 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 714 | * an INIT ACK using the same parameters it sent in its original |
| 715 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 716 | */ |
| 717 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 718 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 719 | /* |
| 720 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 721 | * “If an INIT ACK is received by an endpoint in any state other |
| 722 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 723 | * INIT ACK chunk”. Stay in the same state |
| 724 | */ |
| 725 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 726 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 727 | /* |
| 728 | * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the |
| 729 | * peer and peer shall move to the ESTABISHED. if it doesn't handle |
| 730 | * it will send ERROR chunk. So, stay in the same state |
| 731 | */ |
| 732 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 733 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 734 | /* |
| 735 | * COOKIE ACK from client, not sure what to do stay in the same state |
| 736 | */ |
| 737 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 738 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 739 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 740 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 741 | /* |
| 742 | * SHUTDOWN sent from the client, move to SHUDDOWN_CLI |
| 743 | */ |
| 744 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 745 | /* |
| 746 | * SHUTDOWN sent from the server, move to SHUTDOWN_SER |
| 747 | */ |
| 748 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 749 | /* |
| 750 | * client resent SHUDTDOWN_ACK, let's stay in the same state |
| 751 | */ |
| 752 | {IP_VS_SCTP_S_SHUT_ACK_CLI /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 753 | /* |
| 754 | * Server sent SHUTDOWN ACK, this should not happen, let's close the |
| 755 | * connection |
| 756 | */ |
| 757 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 758 | /* |
| 759 | * SHUTDOWN COM from client, this should not happen, let's close the |
| 760 | * connection |
| 761 | */ |
| 762 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 763 | /* |
| 764 | * SHUTDOWN COMPLETE from server this is what we are expecting. |
| 765 | */ |
| 766 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 767 | }, |
| 768 | |
| 769 | /* |
| 770 | * State : IP_VS_SCTP_S_SHUT_ACK_SER |
| 771 | * SHUTDOWN ACK from the server, awaiting for SHUTDOWN COM from client |
| 772 | */ |
| 773 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 774 | * We received the data chuck, keep the state unchanged. I assume |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 775 | * that still data chuncks can be received by both the peers in |
| 776 | * SHUDOWN state |
| 777 | */ |
| 778 | |
| 779 | {{IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 780 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 781 | /* |
| 782 | * We have got an INIT from client. From the spec.“Upon receipt of |
| 783 | * an INIT in the COOKIE-WAIT state, an endpoint MUST respond with |
| 784 | * an INIT ACK using the same parameters it sent in its original |
| 785 | * INIT chunk (including its Initiate Tag, unchanged”). |
| 786 | */ |
| 787 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 788 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 789 | /* |
| 790 | * INIT_ACK sent by the server, Unexpected INIT ACK, spec says, |
| 791 | * “If an INIT ACK is received by an endpoint in any state other |
| 792 | * than the COOKIE-WAIT state, the endpoint should discard the |
| 793 | * INIT ACK chunk”. Stay in the same state |
| 794 | */ |
| 795 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 796 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 797 | /* |
| 798 | * Client sent ECHO, Spec(sec 5.2.4) says it may be handled by the |
| 799 | * peer and peer shall move to the ESTABISHED. if it doesn't handle |
| 800 | * it will send ERROR chunk. So, stay in the same state |
| 801 | */ |
| 802 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 803 | {IP_VS_SCTP_S_ESTABLISHED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 804 | /* |
| 805 | * COOKIE ACK from client, not sure what to do stay in the same state |
| 806 | */ |
| 807 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 808 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 809 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 810 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 811 | /* |
| 812 | * SHUTDOWN sent from the client, move to SHUDDOWN_CLI |
| 813 | */ |
| 814 | {IP_VS_SCTP_S_SHUT_CLI /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 815 | /* |
| 816 | * SHUTDOWN sent from the server, move to SHUTDOWN_SER |
| 817 | */ |
| 818 | {IP_VS_SCTP_S_SHUT_SER /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 819 | /* |
| 820 | * client sent SHUDTDOWN_ACK, this should not happen let's close |
| 821 | * the connection. |
| 822 | */ |
| 823 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 824 | /* |
| 825 | * Server resent SHUTDOWN ACK, stay in the same state |
| 826 | */ |
| 827 | {IP_VS_SCTP_S_SHUT_ACK_SER /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 828 | /* |
| 829 | * SHUTDOWN COM from client, this what we are expecting, let's close |
| 830 | * the connection |
| 831 | */ |
| 832 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 833 | /* |
| 834 | * SHUTDOWN COMPLETE from server this should not happen. |
| 835 | */ |
| 836 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 837 | }, |
| 838 | /* |
| 839 | * State : IP_VS_SCTP_S_CLOSED |
| 840 | */ |
| 841 | {{IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_CLI */ }, |
| 842 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_DATA_SER */ }, |
| 843 | {IP_VS_SCTP_S_INIT_CLI /* IP_VS_SCTP_EVE_INIT_CLI */ }, |
| 844 | {IP_VS_SCTP_S_INIT_SER /* IP_VS_SCTP_EVE_INIT_SER */ }, |
| 845 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_CLI */ }, |
| 846 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_INIT_ACK_SER */ }, |
| 847 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_CLI */ }, |
| 848 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ECHO_SER */ }, |
| 849 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_CLI */ }, |
| 850 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_COOKIE_ACK_SER */ }, |
| 851 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_CLI */ }, |
| 852 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_ABORT_SER */ }, |
| 853 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_CLI */ }, |
| 854 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_SER */ }, |
| 855 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_CLI */ }, |
| 856 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_ACK_SER */ }, |
| 857 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_CLI */ }, |
| 858 | {IP_VS_SCTP_S_CLOSED /* IP_VS_SCTP_EVE_SHUT_COM_SER */ } |
| 859 | } |
| 860 | }; |
| 861 | |
| 862 | /* |
| 863 | * Timeout table[state] |
| 864 | */ |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 865 | static const int sctp_timeouts[IP_VS_SCTP_S_LAST + 1] = { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 866 | [IP_VS_SCTP_S_NONE] = 2 * HZ, |
| 867 | [IP_VS_SCTP_S_INIT_CLI] = 1 * 60 * HZ, |
| 868 | [IP_VS_SCTP_S_INIT_SER] = 1 * 60 * HZ, |
| 869 | [IP_VS_SCTP_S_INIT_ACK_CLI] = 1 * 60 * HZ, |
| 870 | [IP_VS_SCTP_S_INIT_ACK_SER] = 1 * 60 * HZ, |
| 871 | [IP_VS_SCTP_S_ECHO_CLI] = 1 * 60 * HZ, |
| 872 | [IP_VS_SCTP_S_ECHO_SER] = 1 * 60 * HZ, |
| 873 | [IP_VS_SCTP_S_ESTABLISHED] = 15 * 60 * HZ, |
| 874 | [IP_VS_SCTP_S_SHUT_CLI] = 1 * 60 * HZ, |
| 875 | [IP_VS_SCTP_S_SHUT_SER] = 1 * 60 * HZ, |
| 876 | [IP_VS_SCTP_S_SHUT_ACK_CLI] = 1 * 60 * HZ, |
| 877 | [IP_VS_SCTP_S_SHUT_ACK_SER] = 1 * 60 * HZ, |
| 878 | [IP_VS_SCTP_S_CLOSED] = 10 * HZ, |
| 879 | [IP_VS_SCTP_S_LAST] = 2 * HZ, |
| 880 | }; |
| 881 | |
| 882 | static const char *sctp_state_name_table[IP_VS_SCTP_S_LAST + 1] = { |
| 883 | [IP_VS_SCTP_S_NONE] = "NONE", |
| 884 | [IP_VS_SCTP_S_INIT_CLI] = "INIT_CLI", |
| 885 | [IP_VS_SCTP_S_INIT_SER] = "INIT_SER", |
| 886 | [IP_VS_SCTP_S_INIT_ACK_CLI] = "INIT_ACK_CLI", |
| 887 | [IP_VS_SCTP_S_INIT_ACK_SER] = "INIT_ACK_SER", |
| 888 | [IP_VS_SCTP_S_ECHO_CLI] = "COOKIE_ECHO_CLI", |
| 889 | [IP_VS_SCTP_S_ECHO_SER] = "COOKIE_ECHO_SER", |
| 890 | [IP_VS_SCTP_S_ESTABLISHED] = "ESTABISHED", |
| 891 | [IP_VS_SCTP_S_SHUT_CLI] = "SHUTDOWN_CLI", |
| 892 | [IP_VS_SCTP_S_SHUT_SER] = "SHUTDOWN_SER", |
| 893 | [IP_VS_SCTP_S_SHUT_ACK_CLI] = "SHUTDOWN_ACK_CLI", |
| 894 | [IP_VS_SCTP_S_SHUT_ACK_SER] = "SHUTDOWN_ACK_SER", |
| 895 | [IP_VS_SCTP_S_CLOSED] = "CLOSED", |
| 896 | [IP_VS_SCTP_S_LAST] = "BUG!" |
| 897 | }; |
| 898 | |
| 899 | |
| 900 | static const char *sctp_state_name(int state) |
| 901 | { |
| 902 | if (state >= IP_VS_SCTP_S_LAST) |
| 903 | return "ERR!"; |
| 904 | if (sctp_state_name_table[state]) |
| 905 | return sctp_state_name_table[state]; |
| 906 | return "?"; |
| 907 | } |
| 908 | |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 909 | static inline void |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 910 | 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] | 911 | int direction, const struct sk_buff *skb) |
| 912 | { |
| 913 | sctp_chunkhdr_t _sctpch, *sch; |
| 914 | unsigned char chunk_type; |
| 915 | int event, next_state; |
| 916 | int ihl; |
| 917 | |
| 918 | #ifdef CONFIG_IP_VS_IPV6 |
| 919 | ihl = cp->af == AF_INET ? ip_hdrlen(skb) : sizeof(struct ipv6hdr); |
| 920 | #else |
| 921 | ihl = ip_hdrlen(skb); |
| 922 | #endif |
| 923 | |
| 924 | sch = skb_header_pointer(skb, ihl + sizeof(sctp_sctphdr_t), |
| 925 | sizeof(_sctpch), &_sctpch); |
| 926 | if (sch == NULL) |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 927 | return; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 928 | |
| 929 | chunk_type = sch->type; |
| 930 | /* |
| 931 | * Section 3: Multiple chunks can be bundled into one SCTP packet |
| 932 | * up to the MTU size, except for the INIT, INIT ACK, and |
| 933 | * SHUTDOWN COMPLETE chunks. These chunks MUST NOT be bundled with |
| 934 | * any other chunk in a packet. |
| 935 | * |
| 936 | * Section 3.3.7: DATA chunks MUST NOT be bundled with ABORT. Control |
| 937 | * chunks (except for INIT, INIT ACK, and SHUTDOWN COMPLETE) MAY be |
| 938 | * bundled with an ABORT, but they MUST be placed before the ABORT |
| 939 | * in the SCTP packet or they will be ignored by the receiver. |
| 940 | */ |
| 941 | if ((sch->type == SCTP_CID_COOKIE_ECHO) || |
| 942 | (sch->type == SCTP_CID_COOKIE_ACK)) { |
| 943 | sch = skb_header_pointer(skb, (ihl + sizeof(sctp_sctphdr_t) + |
| 944 | sch->length), sizeof(_sctpch), &_sctpch); |
| 945 | if (sch) { |
| 946 | if (sch->type == SCTP_CID_ABORT) |
| 947 | chunk_type = sch->type; |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | event = sctp_events[chunk_type]; |
| 952 | |
| 953 | /* |
| 954 | * If the direction is IP_VS_DIR_OUTPUT, this event is from server |
| 955 | */ |
| 956 | if (direction == IP_VS_DIR_OUTPUT) |
| 957 | event++; |
| 958 | /* |
| 959 | * get next state |
| 960 | */ |
| 961 | next_state = sctp_states_table[cp->state][event].next_state; |
| 962 | |
| 963 | if (next_state != cp->state) { |
| 964 | struct ip_vs_dest *dest = cp->dest; |
| 965 | |
| 966 | IP_VS_DBG_BUF(8, "%s %s %s:%d->" |
| 967 | "%s:%d state: %s->%s conn->refcnt:%d\n", |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 968 | pd->pp->name, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 969 | ((direction == IP_VS_DIR_OUTPUT) ? |
| 970 | "output " : "input "), |
| 971 | IP_VS_DBG_ADDR(cp->af, &cp->daddr), |
| 972 | ntohs(cp->dport), |
| 973 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 974 | ntohs(cp->cport), |
| 975 | sctp_state_name(cp->state), |
| 976 | sctp_state_name(next_state), |
| 977 | atomic_read(&cp->refcnt)); |
| 978 | if (dest) { |
| 979 | if (!(cp->flags & IP_VS_CONN_F_INACTIVE) && |
| 980 | (next_state != IP_VS_SCTP_S_ESTABLISHED)) { |
| 981 | atomic_dec(&dest->activeconns); |
| 982 | atomic_inc(&dest->inactconns); |
| 983 | cp->flags |= IP_VS_CONN_F_INACTIVE; |
| 984 | } else if ((cp->flags & IP_VS_CONN_F_INACTIVE) && |
| 985 | (next_state == IP_VS_SCTP_S_ESTABLISHED)) { |
| 986 | atomic_inc(&dest->activeconns); |
| 987 | atomic_dec(&dest->inactconns); |
| 988 | cp->flags &= ~IP_VS_CONN_F_INACTIVE; |
| 989 | } |
| 990 | } |
| 991 | } |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 992 | if (likely(pd)) |
| 993 | cp->timeout = pd->timeout_table[cp->state = next_state]; |
| 994 | else /* What to do ? */ |
| 995 | cp->timeout = sctp_timeouts[cp->state = next_state]; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 996 | } |
| 997 | |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 998 | static void |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 999 | sctp_state_transition(struct ip_vs_conn *cp, int direction, |
Hans Schillstrom | 9330419 | 2011-01-03 14:44:51 +0100 | [diff] [blame] | 1000 | const struct sk_buff *skb, struct ip_vs_proto_data *pd) |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1001 | { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1002 | spin_lock(&cp->lock); |
Simon Horman | 4a516f1 | 2011-09-16 14:11:49 +0900 | [diff] [blame] | 1003 | set_sctp_state(pd, cp, direction, skb); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1004 | spin_unlock(&cp->lock); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1005 | } |
| 1006 | |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1007 | static inline __u16 sctp_app_hashkey(__be16 port) |
| 1008 | { |
| 1009 | return (((__force u16)port >> SCTP_APP_TAB_BITS) ^ (__force u16)port) |
| 1010 | & SCTP_APP_TAB_MASK; |
| 1011 | } |
| 1012 | |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 1013 | 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] | 1014 | { |
| 1015 | struct ip_vs_app *i; |
| 1016 | __u16 hash; |
| 1017 | __be16 port = inc->port; |
| 1018 | int ret = 0; |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 1019 | struct netns_ipvs *ipvs = net_ipvs(net); |
| 1020 | 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] | 1021 | |
| 1022 | hash = sctp_app_hashkey(port); |
| 1023 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1024 | spin_lock_bh(&ipvs->sctp_app_lock); |
| 1025 | list_for_each_entry(i, &ipvs->sctp_apps[hash], p_list) { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1026 | if (i->port == port) { |
| 1027 | ret = -EEXIST; |
| 1028 | goto out; |
| 1029 | } |
| 1030 | } |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1031 | list_add(&inc->p_list, &ipvs->sctp_apps[hash]); |
Hans Schillstrom | 9bbac6a | 2011-01-03 14:44:52 +0100 | [diff] [blame] | 1032 | atomic_inc(&pd->appcnt); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1033 | out: |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1034 | spin_unlock_bh(&ipvs->sctp_app_lock); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1035 | |
| 1036 | return ret; |
| 1037 | } |
| 1038 | |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 1039 | 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] | 1040 | { |
Hans Schillstrom | ab8a5e8 | 2011-01-03 14:44:53 +0100 | [diff] [blame] | 1041 | struct netns_ipvs *ipvs = net_ipvs(net); |
| 1042 | 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] | 1043 | |
| 1044 | spin_lock_bh(&ipvs->sctp_app_lock); |
Hans Schillstrom | 9bbac6a | 2011-01-03 14:44:52 +0100 | [diff] [blame] | 1045 | atomic_dec(&pd->appcnt); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1046 | list_del(&inc->p_list); |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1047 | spin_unlock_bh(&ipvs->sctp_app_lock); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1048 | } |
| 1049 | |
| 1050 | static int sctp_app_conn_bind(struct ip_vs_conn *cp) |
| 1051 | { |
Hans Schillstrom | 6e67e58 | 2011-01-03 14:44:57 +0100 | [diff] [blame] | 1052 | struct netns_ipvs *ipvs = net_ipvs(ip_vs_conn_net(cp)); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1053 | int hash; |
| 1054 | struct ip_vs_app *inc; |
| 1055 | int result = 0; |
| 1056 | |
| 1057 | /* Default binding: bind app only for NAT */ |
| 1058 | if (IP_VS_FWD_METHOD(cp) != IP_VS_CONN_F_MASQ) |
| 1059 | return 0; |
| 1060 | /* Lookup application incarnations and bind the right one */ |
| 1061 | hash = sctp_app_hashkey(cp->vport); |
| 1062 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1063 | spin_lock(&ipvs->sctp_app_lock); |
| 1064 | list_for_each_entry(inc, &ipvs->sctp_apps[hash], p_list) { |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1065 | if (inc->port == cp->vport) { |
| 1066 | if (unlikely(!ip_vs_app_inc_get(inc))) |
| 1067 | break; |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1068 | spin_unlock(&ipvs->sctp_app_lock); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1069 | |
| 1070 | IP_VS_DBG_BUF(9, "%s: Binding conn %s:%u->" |
| 1071 | "%s:%u to app %s on port %u\n", |
| 1072 | __func__, |
| 1073 | IP_VS_DBG_ADDR(cp->af, &cp->caddr), |
| 1074 | ntohs(cp->cport), |
| 1075 | IP_VS_DBG_ADDR(cp->af, &cp->vaddr), |
| 1076 | ntohs(cp->vport), |
| 1077 | inc->name, ntohs(inc->port)); |
| 1078 | cp->app = inc; |
| 1079 | if (inc->init_conn) |
| 1080 | result = inc->init_conn(inc, cp); |
| 1081 | goto out; |
| 1082 | } |
| 1083 | } |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1084 | spin_unlock(&ipvs->sctp_app_lock); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1085 | out: |
| 1086 | return result; |
| 1087 | } |
| 1088 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1089 | /* --------------------------------------------- |
| 1090 | * timeouts is netns related now. |
| 1091 | * --------------------------------------------- |
| 1092 | */ |
Hans Schillstrom | 582b8e3 | 2012-04-26 09:45:35 +0200 | [diff] [blame] | 1093 | 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] | 1094 | { |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1095 | struct netns_ipvs *ipvs = net_ipvs(net); |
| 1096 | |
| 1097 | ip_vs_init_hash_table(ipvs->sctp_apps, SCTP_APP_TAB_SIZE); |
Simon Horman | 8525d6f | 2011-02-03 07:22:43 +0900 | [diff] [blame] | 1098 | spin_lock_init(&ipvs->sctp_app_lock); |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1099 | pd->timeout_table = ip_vs_create_timeout_table((int *)sctp_timeouts, |
| 1100 | sizeof(sctp_timeouts)); |
Hans Schillstrom | 582b8e3 | 2012-04-26 09:45:35 +0200 | [diff] [blame] | 1101 | if (!pd->timeout_table) |
| 1102 | return -ENOMEM; |
| 1103 | return 0; |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1104 | } |
| 1105 | |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1106 | 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] | 1107 | { |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1108 | kfree(pd->timeout_table); |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1109 | } |
| 1110 | |
| 1111 | struct ip_vs_protocol ip_vs_protocol_sctp = { |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1112 | .name = "SCTP", |
| 1113 | .protocol = IPPROTO_SCTP, |
| 1114 | .num_states = IP_VS_SCTP_S_LAST, |
| 1115 | .dont_defrag = 0, |
| 1116 | .init = NULL, |
| 1117 | .exit = NULL, |
| 1118 | .init_netns = __ip_vs_sctp_init, |
| 1119 | .exit_netns = __ip_vs_sctp_exit, |
| 1120 | .register_app = sctp_register_app, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1121 | .unregister_app = sctp_unregister_app, |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1122 | .conn_schedule = sctp_conn_schedule, |
| 1123 | .conn_in_get = ip_vs_conn_in_get_proto, |
| 1124 | .conn_out_get = ip_vs_conn_out_get_proto, |
| 1125 | .snat_handler = sctp_snat_handler, |
| 1126 | .dnat_handler = sctp_dnat_handler, |
| 1127 | .csum_check = sctp_csum_check, |
| 1128 | .state_name = sctp_state_name, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1129 | .state_transition = sctp_state_transition, |
Hans Schillstrom | 9d93487 | 2011-01-03 14:44:49 +0100 | [diff] [blame] | 1130 | .app_conn_bind = sctp_app_conn_bind, |
| 1131 | .debug_packet = ip_vs_tcpudp_debug_packet, |
| 1132 | .timeout_change = NULL, |
Venkata Mohan Reddy | 2906f66 | 2010-02-18 12:31:05 +0100 | [diff] [blame] | 1133 | }; |