Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_DCCP_H |
| 2 | #define _LINUX_DCCP_H |
| 3 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 4 | #include <linux/types.h> |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 5 | #include <asm/byteorder.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 6 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 7 | /** |
| 8 | * struct dccp_hdr - generic part of DCCP packet header |
| 9 | * |
| 10 | * @dccph_sport - Relevant port on the endpoint that sent this packet |
| 11 | * @dccph_dport - Relevant port on the other endpoint |
| 12 | * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words |
| 13 | * @dccph_ccval - Used by the HC-Sender CCID |
| 14 | * @dccph_cscov - Parts of the packet that are covered by the Checksum field |
| 15 | * @dccph_checksum - Internet checksum, depends on dccph_cscov |
| 16 | * @dccph_x - 0 = 24 bit sequence number, 1 = 48 |
| 17 | * @dccph_type - packet type, see DCCP_PKT_ prefixed macros |
| 18 | * @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x |
| 19 | */ |
| 20 | struct dccp_hdr { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 21 | __be16 dccph_sport, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 22 | dccph_dport; |
| 23 | __u8 dccph_doff; |
| 24 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
| 25 | __u8 dccph_cscov:4, |
| 26 | dccph_ccval:4; |
| 27 | #elif defined(__BIG_ENDIAN_BITFIELD) |
| 28 | __u8 dccph_ccval:4, |
| 29 | dccph_cscov:4; |
| 30 | #else |
| 31 | #error "Adjust your <asm/byteorder.h> defines" |
| 32 | #endif |
| 33 | __u16 dccph_checksum; |
| 34 | #if defined(__LITTLE_ENDIAN_BITFIELD) |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 35 | __u8 dccph_x:1, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 36 | dccph_type:4, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 37 | dccph_reserved:3; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 38 | #elif defined(__BIG_ENDIAN_BITFIELD) |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 39 | __u8 dccph_reserved:3, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 40 | dccph_type:4, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 41 | dccph_x:1; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 42 | #else |
| 43 | #error "Adjust your <asm/byteorder.h> defines" |
| 44 | #endif |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 45 | __u8 dccph_seq2; |
| 46 | __be16 dccph_seq; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 47 | }; |
| 48 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 49 | /** |
| 50 | * struct dccp_hdr_ext - the low bits of a 48 bit seq packet |
| 51 | * |
| 52 | * @dccph_seq_low - low 24 bits of a 48 bit seq packet |
| 53 | */ |
| 54 | struct dccp_hdr_ext { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 55 | __be32 dccph_seq_low; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 56 | }; |
| 57 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 58 | /** |
| 59 | * struct dccp_hdr_request - Conection initiation request header |
| 60 | * |
| 61 | * @dccph_req_service - Service to which the client app wants to connect |
| 62 | * @dccph_req_options - list of options (must be a multiple of 32 bits |
| 63 | */ |
| 64 | struct dccp_hdr_request { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 65 | __be32 dccph_req_service; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 66 | }; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 67 | /** |
| 68 | * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets |
| 69 | * |
| 70 | * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR |
| 71 | * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR |
| 72 | */ |
| 73 | struct dccp_hdr_ack_bits { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 74 | __be16 dccph_reserved1; |
| 75 | __be16 dccph_ack_nr_high; |
| 76 | __be32 dccph_ack_nr_low; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 77 | }; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 78 | /** |
| 79 | * struct dccp_hdr_response - Conection initiation response header |
| 80 | * |
| 81 | * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR |
| 82 | * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR |
| 83 | * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request |
| 84 | * @dccph_resp_options - list of options (must be a multiple of 32 bits |
| 85 | */ |
| 86 | struct dccp_hdr_response { |
| 87 | struct dccp_hdr_ack_bits dccph_resp_ack; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 88 | __be32 dccph_resp_service; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 89 | }; |
| 90 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 91 | /** |
| 92 | * struct dccp_hdr_reset - Unconditionally shut down a connection |
| 93 | * |
| 94 | * @dccph_reset_service - Echoes the Service Code on a received DCCP-Request |
| 95 | * @dccph_reset_options - list of options (must be a multiple of 32 bits |
| 96 | */ |
| 97 | struct dccp_hdr_reset { |
| 98 | struct dccp_hdr_ack_bits dccph_reset_ack; |
| 99 | __u8 dccph_reset_code, |
| 100 | dccph_reset_data[3]; |
| 101 | }; |
| 102 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 103 | enum dccp_pkt_type { |
| 104 | DCCP_PKT_REQUEST = 0, |
| 105 | DCCP_PKT_RESPONSE, |
| 106 | DCCP_PKT_DATA, |
| 107 | DCCP_PKT_ACK, |
| 108 | DCCP_PKT_DATAACK, |
| 109 | DCCP_PKT_CLOSEREQ, |
| 110 | DCCP_PKT_CLOSE, |
| 111 | DCCP_PKT_RESET, |
| 112 | DCCP_PKT_SYNC, |
| 113 | DCCP_PKT_SYNCACK, |
| 114 | DCCP_PKT_INVALID, |
| 115 | }; |
| 116 | |
| 117 | #define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID |
| 118 | |
| 119 | static inline unsigned int dccp_packet_hdr_len(const __u8 type) |
| 120 | { |
| 121 | if (type == DCCP_PKT_DATA) |
| 122 | return 0; |
| 123 | if (type == DCCP_PKT_DATAACK || |
| 124 | type == DCCP_PKT_ACK || |
| 125 | type == DCCP_PKT_SYNC || |
| 126 | type == DCCP_PKT_SYNCACK || |
| 127 | type == DCCP_PKT_CLOSE || |
| 128 | type == DCCP_PKT_CLOSEREQ) |
| 129 | return sizeof(struct dccp_hdr_ack_bits); |
| 130 | if (type == DCCP_PKT_REQUEST) |
| 131 | return sizeof(struct dccp_hdr_request); |
| 132 | if (type == DCCP_PKT_RESPONSE) |
| 133 | return sizeof(struct dccp_hdr_response); |
| 134 | return sizeof(struct dccp_hdr_reset); |
| 135 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 136 | enum dccp_reset_codes { |
| 137 | DCCP_RESET_CODE_UNSPECIFIED = 0, |
| 138 | DCCP_RESET_CODE_CLOSED, |
| 139 | DCCP_RESET_CODE_ABORTED, |
| 140 | DCCP_RESET_CODE_NO_CONNECTION, |
| 141 | DCCP_RESET_CODE_PACKET_ERROR, |
| 142 | DCCP_RESET_CODE_OPTION_ERROR, |
| 143 | DCCP_RESET_CODE_MANDATORY_ERROR, |
| 144 | DCCP_RESET_CODE_CONNECTION_REFUSED, |
| 145 | DCCP_RESET_CODE_BAD_SERVICE_CODE, |
| 146 | DCCP_RESET_CODE_TOO_BUSY, |
| 147 | DCCP_RESET_CODE_BAD_INIT_COOKIE, |
| 148 | DCCP_RESET_CODE_AGGRESSION_PENALTY, |
| 149 | }; |
| 150 | |
| 151 | /* DCCP options */ |
| 152 | enum { |
| 153 | DCCPO_PADDING = 0, |
| 154 | DCCPO_MANDATORY = 1, |
| 155 | DCCPO_MIN_RESERVED = 3, |
| 156 | DCCPO_MAX_RESERVED = 31, |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 157 | DCCPO_CHANGE_L = 32, |
| 158 | DCCPO_CONFIRM_L = 33, |
| 159 | DCCPO_CHANGE_R = 34, |
| 160 | DCCPO_CONFIRM_R = 35, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 161 | DCCPO_NDP_COUNT = 37, |
| 162 | DCCPO_ACK_VECTOR_0 = 38, |
| 163 | DCCPO_ACK_VECTOR_1 = 39, |
| 164 | DCCPO_TIMESTAMP = 41, |
| 165 | DCCPO_TIMESTAMP_ECHO = 42, |
| 166 | DCCPO_ELAPSED_TIME = 43, |
| 167 | DCCPO_MAX = 45, |
| 168 | DCCPO_MIN_CCID_SPECIFIC = 128, |
| 169 | DCCPO_MAX_CCID_SPECIFIC = 255, |
| 170 | }; |
| 171 | |
Ian McDonald | b83eff6 | 2006-09-22 14:25:36 +1200 | [diff] [blame] | 172 | /* DCCP CCIDS */ |
| 173 | enum { |
| 174 | DCCPC_CCID2 = 2, |
| 175 | DCCPC_CCID3 = 3, |
| 176 | }; |
| 177 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 178 | /* DCCP features */ |
| 179 | enum { |
| 180 | DCCPF_RESERVED = 0, |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 181 | DCCPF_CCID = 1, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 182 | DCCPF_SEQUENCE_WINDOW = 3, |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 183 | DCCPF_ACK_RATIO = 5, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 184 | DCCPF_SEND_ACK_VECTOR = 6, |
| 185 | DCCPF_SEND_NDP_COUNT = 7, |
| 186 | /* 10-127 reserved */ |
| 187 | DCCPF_MIN_CCID_SPECIFIC = 128, |
| 188 | DCCPF_MAX_CCID_SPECIFIC = 255, |
| 189 | }; |
| 190 | |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 191 | /* this structure is argument to DCCP_SOCKOPT_CHANGE_X */ |
| 192 | struct dccp_so_feat { |
| 193 | __u8 dccpsf_feat; |
Al Viro | 1acc04c | 2006-10-10 22:44:37 +0100 | [diff] [blame] | 194 | __u8 __user *dccpsf_val; |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 195 | __u8 dccpsf_len; |
| 196 | }; |
| 197 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 198 | /* DCCP socket options */ |
| 199 | #define DCCP_SOCKOPT_PACKET_SIZE 1 |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 200 | #define DCCP_SOCKOPT_SERVICE 2 |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 201 | #define DCCP_SOCKOPT_CHANGE_L 3 |
| 202 | #define DCCP_SOCKOPT_CHANGE_R 4 |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 203 | #define DCCP_SOCKOPT_CCID_RX_INFO 128 |
| 204 | #define DCCP_SOCKOPT_CCID_TX_INFO 192 |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 205 | |
| 206 | #define DCCP_SERVICE_LIST_MAX_LEN 32 |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 207 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 208 | #ifdef __KERNEL__ |
| 209 | |
| 210 | #include <linux/in.h> |
| 211 | #include <linux/list.h> |
| 212 | #include <linux/uio.h> |
| 213 | #include <linux/workqueue.h> |
| 214 | |
| 215 | #include <net/inet_connection_sock.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 216 | #include <net/inet_sock.h> |
Arnaldo Carvalho de Melo | 64cf1e5 | 2005-08-09 20:45:21 -0700 | [diff] [blame] | 217 | #include <net/inet_timewait_sock.h> |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 218 | #include <net/tcp_states.h> |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 219 | |
| 220 | enum dccp_state { |
| 221 | DCCP_OPEN = TCP_ESTABLISHED, |
| 222 | DCCP_REQUESTING = TCP_SYN_SENT, |
| 223 | DCCP_PARTOPEN = TCP_FIN_WAIT1, /* FIXME: |
| 224 | This mapping is horrible, but TCP has |
| 225 | no matching state for DCCP_PARTOPEN, |
| 226 | as TCP_SYN_RECV is already used by |
| 227 | DCCP_RESPOND, why don't stop using TCP |
| 228 | mapping of states? OK, now we don't use |
| 229 | sk_stream_sendmsg anymore, so doesn't |
| 230 | seem to exist any reason for us to |
| 231 | do the TCP mapping here */ |
| 232 | DCCP_LISTEN = TCP_LISTEN, |
| 233 | DCCP_RESPOND = TCP_SYN_RECV, |
| 234 | DCCP_CLOSING = TCP_CLOSING, |
| 235 | DCCP_TIME_WAIT = TCP_TIME_WAIT, |
| 236 | DCCP_CLOSED = TCP_CLOSE, |
| 237 | DCCP_MAX_STATES = TCP_MAX_STATES, |
| 238 | }; |
| 239 | |
| 240 | #define DCCP_STATE_MASK 0xf |
| 241 | #define DCCP_ACTION_FIN (1<<7) |
| 242 | |
| 243 | enum { |
| 244 | DCCPF_OPEN = TCPF_ESTABLISHED, |
| 245 | DCCPF_REQUESTING = TCPF_SYN_SENT, |
| 246 | DCCPF_PARTOPEN = TCPF_FIN_WAIT1, |
| 247 | DCCPF_LISTEN = TCPF_LISTEN, |
| 248 | DCCPF_RESPOND = TCPF_SYN_RECV, |
| 249 | DCCPF_CLOSING = TCPF_CLOSING, |
| 250 | DCCPF_TIME_WAIT = TCPF_TIME_WAIT, |
| 251 | DCCPF_CLOSED = TCPF_CLOSE, |
| 252 | }; |
| 253 | |
| 254 | static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb) |
| 255 | { |
| 256 | return (struct dccp_hdr *)skb->h.raw; |
| 257 | } |
| 258 | |
| 259 | static inline struct dccp_hdr_ext *dccp_hdrx(const struct sk_buff *skb) |
| 260 | { |
| 261 | return (struct dccp_hdr_ext *)(skb->h.raw + sizeof(struct dccp_hdr)); |
| 262 | } |
| 263 | |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 264 | static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh) |
| 265 | { |
| 266 | return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0); |
| 267 | } |
| 268 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 269 | static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb) |
| 270 | { |
| 271 | const struct dccp_hdr *dh = dccp_hdr(skb); |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 272 | return __dccp_basic_hdr_len(dh); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static inline __u64 dccp_hdr_seq(const struct sk_buff *skb) |
| 276 | { |
| 277 | const struct dccp_hdr *dh = dccp_hdr(skb); |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 278 | __u64 seq_nr = ntohs(dh->dccph_seq); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 279 | |
| 280 | if (dh->dccph_x != 0) |
| 281 | seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(skb)->dccph_seq_low); |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 282 | else |
| 283 | seq_nr += (u32)dh->dccph_seq2 << 16; |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 284 | |
| 285 | return seq_nr; |
| 286 | } |
| 287 | |
| 288 | static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb) |
| 289 | { |
| 290 | return (struct dccp_hdr_request *)(skb->h.raw + dccp_basic_hdr_len(skb)); |
| 291 | } |
| 292 | |
| 293 | static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb) |
| 294 | { |
| 295 | return (struct dccp_hdr_ack_bits *)(skb->h.raw + dccp_basic_hdr_len(skb)); |
| 296 | } |
| 297 | |
| 298 | static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb) |
| 299 | { |
| 300 | const struct dccp_hdr_ack_bits *dhack = dccp_hdr_ack_bits(skb); |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 301 | return ((u64)ntohs(dhack->dccph_ack_nr_high) << 32) + ntohl(dhack->dccph_ack_nr_low); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb) |
| 305 | { |
| 306 | return (struct dccp_hdr_response *)(skb->h.raw + dccp_basic_hdr_len(skb)); |
| 307 | } |
| 308 | |
| 309 | static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb) |
| 310 | { |
| 311 | return (struct dccp_hdr_reset *)(skb->h.raw + dccp_basic_hdr_len(skb)); |
| 312 | } |
| 313 | |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 314 | static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh) |
| 315 | { |
| 316 | return __dccp_basic_hdr_len(dh) + |
| 317 | dccp_packet_hdr_len(dh->dccph_type); |
| 318 | } |
| 319 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 320 | static inline unsigned int dccp_hdr_len(const struct sk_buff *skb) |
| 321 | { |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 322 | return __dccp_hdr_len(dccp_hdr(skb)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 326 | /* initial values for each feature */ |
| 327 | #define DCCPF_INITIAL_SEQUENCE_WINDOW 100 |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 328 | #define DCCPF_INITIAL_ACK_RATIO 2 |
Ian McDonald | b83eff6 | 2006-09-22 14:25:36 +1200 | [diff] [blame] | 329 | #define DCCPF_INITIAL_CCID DCCPC_CCID2 |
Andrea Bittau | 2a91aa3 | 2006-03-20 17:41:47 -0800 | [diff] [blame] | 330 | #define DCCPF_INITIAL_SEND_ACK_VECTOR 1 |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 331 | /* FIXME: for now we're default to 1 but it should really be 0 */ |
| 332 | #define DCCPF_INITIAL_SEND_NDP_COUNT 1 |
| 333 | |
| 334 | #define DCCP_NDP_LIMIT 0xFFFFFF |
| 335 | |
| 336 | /** |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 337 | * struct dccp_minisock - Minimal DCCP connection representation |
| 338 | * |
| 339 | * Will be used to pass the state from dccp_request_sock to dccp_sock. |
| 340 | * |
| 341 | * @dccpms_sequence_window - Sequence Window Feature (section 7.5.2) |
| 342 | * @dccpms_ccid - Congestion Control Id (CCID) (section 10) |
| 343 | * @dccpms_send_ack_vector - Send Ack Vector Feature (section 11.5) |
| 344 | * @dccpms_send_ndp_count - Send NDP Count Feature (7.7.2) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 345 | */ |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 346 | struct dccp_minisock { |
| 347 | __u64 dccpms_sequence_window; |
| 348 | __u8 dccpms_rx_ccid; |
| 349 | __u8 dccpms_tx_ccid; |
| 350 | __u8 dccpms_send_ack_vector; |
| 351 | __u8 dccpms_send_ndp_count; |
| 352 | __u8 dccpms_ack_ratio; |
| 353 | struct list_head dccpms_pending; |
| 354 | struct list_head dccpms_conf; |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 355 | }; |
| 356 | |
| 357 | struct dccp_opt_conf { |
| 358 | __u8 *dccpoc_val; |
| 359 | __u8 dccpoc_len; |
| 360 | }; |
| 361 | |
| 362 | struct dccp_opt_pend { |
| 363 | struct list_head dccpop_node; |
| 364 | __u8 dccpop_type; |
| 365 | __u8 dccpop_feat; |
| 366 | __u8 *dccpop_val; |
| 367 | __u8 dccpop_len; |
| 368 | int dccpop_conf; |
| 369 | struct dccp_opt_conf *dccpop_sc; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 370 | }; |
| 371 | |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 372 | extern void __dccp_minisock_init(struct dccp_minisock *dmsk); |
| 373 | extern void dccp_minisock_init(struct dccp_minisock *dmsk); |
| 374 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 375 | extern int dccp_parse_options(struct sock *sk, struct sk_buff *skb); |
| 376 | |
| 377 | struct dccp_request_sock { |
| 378 | struct inet_request_sock dreq_inet_rsk; |
| 379 | __u64 dreq_iss; |
| 380 | __u64 dreq_isr; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 381 | __be32 dreq_service; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 382 | }; |
| 383 | |
| 384 | static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req) |
| 385 | { |
| 386 | return (struct dccp_request_sock *)req; |
| 387 | } |
| 388 | |
Arnaldo Carvalho de Melo | 64cf1e5 | 2005-08-09 20:45:21 -0700 | [diff] [blame] | 389 | extern struct inet_timewait_death_row dccp_death_row; |
| 390 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 391 | struct dccp_options_received { |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 392 | u32 dccpor_ndp; /* only 24 bits */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 393 | u32 dccpor_timestamp; |
| 394 | u32 dccpor_timestamp_echo; |
| 395 | u32 dccpor_elapsed_time; |
| 396 | }; |
| 397 | |
| 398 | struct ccid; |
| 399 | |
| 400 | enum dccp_role { |
| 401 | DCCP_ROLE_UNDEFINED, |
| 402 | DCCP_ROLE_LISTEN, |
| 403 | DCCP_ROLE_CLIENT, |
| 404 | DCCP_ROLE_SERVER, |
| 405 | }; |
| 406 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 407 | struct dccp_service_list { |
| 408 | __u32 dccpsl_nr; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 409 | __be32 dccpsl_list[0]; |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 410 | }; |
| 411 | |
| 412 | #define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1) |
Gerrit Renker | 00e4d11 | 2006-09-22 09:33:58 +0100 | [diff] [blame] | 413 | #define DCCP_SERVICE_CODE_IS_ABSENT 0 |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 414 | |
| 415 | static inline int dccp_list_has_service(const struct dccp_service_list *sl, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 416 | const __be32 service) |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 417 | { |
| 418 | if (likely(sl != NULL)) { |
| 419 | u32 i = sl->dccpsl_nr; |
| 420 | while (i--) |
| 421 | if (sl->dccpsl_list[i] == service) |
| 422 | return 1; |
| 423 | } |
| 424 | return 0; |
| 425 | } |
| 426 | |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 427 | struct dccp_ackvec; |
| 428 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 429 | /** |
| 430 | * struct dccp_sock - DCCP socket state |
| 431 | * |
| 432 | * @dccps_swl - sequence number window low |
| 433 | * @dccps_swh - sequence number window high |
| 434 | * @dccps_awl - acknowledgement number window low |
| 435 | * @dccps_awh - acknowledgement number window high |
| 436 | * @dccps_iss - initial sequence number sent |
| 437 | * @dccps_isr - initial sequence number received |
| 438 | * @dccps_osr - first OPEN sequence number received |
| 439 | * @dccps_gss - greatest sequence number sent |
| 440 | * @dccps_gsr - greatest valid sequence number received |
| 441 | * @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss |
| 442 | * @dccps_timestamp_time - time of latest TIMESTAMP option |
| 443 | * @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 444 | * @dccps_packet_size - Set thru setsockopt |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 445 | * @dccps_role - Role of this sock, one of %dccp_role |
| 446 | * @dccps_ndp_count - number of Non Data Packets since last data packet |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 447 | * @dccps_hc_rx_ackvec - rx half connection ack vector |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 448 | * @dccps_xmit_timer - timer for when CCID is not ready to send |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 449 | */ |
| 450 | struct dccp_sock { |
| 451 | /* inet_connection_sock has to be the first member of dccp_sock */ |
| 452 | struct inet_connection_sock dccps_inet_connection; |
| 453 | __u64 dccps_swl; |
| 454 | __u64 dccps_swh; |
| 455 | __u64 dccps_awl; |
| 456 | __u64 dccps_awh; |
| 457 | __u64 dccps_iss; |
| 458 | __u64 dccps_isr; |
| 459 | __u64 dccps_osr; |
| 460 | __u64 dccps_gss; |
| 461 | __u64 dccps_gsr; |
| 462 | __u64 dccps_gar; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 463 | __be32 dccps_service; |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 464 | struct dccp_service_list *dccps_service_list; |
Ian McDonald | 1bc0986 | 2005-08-20 00:23:43 -0300 | [diff] [blame] | 465 | struct timeval dccps_timestamp_time; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 466 | __u32 dccps_timestamp_echo; |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 467 | __u32 dccps_packet_size; |
Andrea Bittau | 2a91aa3 | 2006-03-20 17:41:47 -0800 | [diff] [blame] | 468 | __u16 dccps_l_ack_ratio; |
| 469 | __u16 dccps_r_ack_ratio; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 470 | unsigned long dccps_ndp_count; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 471 | __u32 dccps_mss_cache; |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 472 | struct dccp_minisock dccps_minisock; |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 473 | struct dccp_ackvec *dccps_hc_rx_ackvec; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 474 | struct ccid *dccps_hc_rx_ccid; |
| 475 | struct ccid *dccps_hc_tx_ccid; |
| 476 | struct dccp_options_received dccps_options_received; |
Arnaldo Carvalho de Melo | b0e5678 | 2005-09-09 02:38:35 -0300 | [diff] [blame] | 477 | struct timeval dccps_epoch; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 478 | enum dccp_role dccps_role:2; |
Arnaldo Carvalho de Melo | 507d37c | 2005-09-09 02:30:07 -0300 | [diff] [blame] | 479 | __u8 dccps_hc_rx_insert_options:1; |
| 480 | __u8 dccps_hc_tx_insert_options:1; |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 481 | struct timer_list dccps_xmit_timer; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 482 | }; |
| 483 | |
| 484 | static inline struct dccp_sock *dccp_sk(const struct sock *sk) |
| 485 | { |
| 486 | return (struct dccp_sock *)sk; |
| 487 | } |
| 488 | |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 489 | static inline struct dccp_minisock *dccp_msk(const struct sock *sk) |
| 490 | { |
| 491 | return (struct dccp_minisock *)&dccp_sk(sk)->dccps_minisock; |
| 492 | } |
| 493 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 494 | static inline const char *dccp_role(const struct sock *sk) |
| 495 | { |
| 496 | switch (dccp_sk(sk)->dccps_role) { |
| 497 | case DCCP_ROLE_UNDEFINED: return "undefined"; |
| 498 | case DCCP_ROLE_LISTEN: return "listen"; |
| 499 | case DCCP_ROLE_SERVER: return "server"; |
| 500 | case DCCP_ROLE_CLIENT: return "client"; |
| 501 | } |
| 502 | return NULL; |
| 503 | } |
| 504 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 505 | #endif /* __KERNEL__ */ |
| 506 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 507 | #endif /* _LINUX_DCCP_H */ |