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 |
Al Viro | 9981a0e | 2006-11-14 21:24:30 -0800 | [diff] [blame] | 33 | __sum16 dccph_checksum; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 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 | /** |
Gerrit Renker | 0430ee3 | 2007-09-26 11:27:56 -0300 | [diff] [blame] | 59 | * struct dccp_hdr_request - Connection initiation request header |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 60 | * |
| 61 | * @dccph_req_service - Service to which the client app wants to connect |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 62 | */ |
| 63 | struct dccp_hdr_request { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 64 | __be32 dccph_req_service; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 65 | }; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 66 | /** |
| 67 | * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets |
| 68 | * |
| 69 | * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR |
| 70 | * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR |
| 71 | */ |
| 72 | struct dccp_hdr_ack_bits { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 73 | __be16 dccph_reserved1; |
| 74 | __be16 dccph_ack_nr_high; |
| 75 | __be32 dccph_ack_nr_low; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 76 | }; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 77 | /** |
Gerrit Renker | 0430ee3 | 2007-09-26 11:27:56 -0300 | [diff] [blame] | 78 | * struct dccp_hdr_response - Connection initiation response header |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 79 | * |
Gerrit Renker | 0430ee3 | 2007-09-26 11:27:56 -0300 | [diff] [blame] | 80 | * @dccph_resp_ack - 48 bit Acknowledgment Number Subheader (5.3) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 81 | * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 82 | */ |
| 83 | struct dccp_hdr_response { |
| 84 | struct dccp_hdr_ack_bits dccph_resp_ack; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 85 | __be32 dccph_resp_service; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 86 | }; |
| 87 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 88 | /** |
| 89 | * struct dccp_hdr_reset - Unconditionally shut down a connection |
| 90 | * |
Gerrit Renker | 0430ee3 | 2007-09-26 11:27:56 -0300 | [diff] [blame] | 91 | * @dccph_reset_ack - 48 bit Acknowledgment Number Subheader (5.6) |
| 92 | * @dccph_reset_code - one of %dccp_reset_codes |
| 93 | * @dccph_reset_data - the Data 1 ... Data 3 fields from 5.6 |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 94 | */ |
| 95 | struct dccp_hdr_reset { |
| 96 | struct dccp_hdr_ack_bits dccph_reset_ack; |
| 97 | __u8 dccph_reset_code, |
| 98 | dccph_reset_data[3]; |
| 99 | }; |
| 100 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 101 | enum dccp_pkt_type { |
| 102 | DCCP_PKT_REQUEST = 0, |
| 103 | DCCP_PKT_RESPONSE, |
| 104 | DCCP_PKT_DATA, |
| 105 | DCCP_PKT_ACK, |
| 106 | DCCP_PKT_DATAACK, |
| 107 | DCCP_PKT_CLOSEREQ, |
| 108 | DCCP_PKT_CLOSE, |
| 109 | DCCP_PKT_RESET, |
| 110 | DCCP_PKT_SYNC, |
| 111 | DCCP_PKT_SYNCACK, |
| 112 | DCCP_PKT_INVALID, |
| 113 | }; |
| 114 | |
| 115 | #define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID |
| 116 | |
| 117 | static inline unsigned int dccp_packet_hdr_len(const __u8 type) |
| 118 | { |
| 119 | if (type == DCCP_PKT_DATA) |
| 120 | return 0; |
| 121 | if (type == DCCP_PKT_DATAACK || |
| 122 | type == DCCP_PKT_ACK || |
| 123 | type == DCCP_PKT_SYNC || |
| 124 | type == DCCP_PKT_SYNCACK || |
| 125 | type == DCCP_PKT_CLOSE || |
| 126 | type == DCCP_PKT_CLOSEREQ) |
| 127 | return sizeof(struct dccp_hdr_ack_bits); |
| 128 | if (type == DCCP_PKT_REQUEST) |
| 129 | return sizeof(struct dccp_hdr_request); |
| 130 | if (type == DCCP_PKT_RESPONSE) |
| 131 | return sizeof(struct dccp_hdr_response); |
| 132 | return sizeof(struct dccp_hdr_reset); |
| 133 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 134 | enum dccp_reset_codes { |
| 135 | DCCP_RESET_CODE_UNSPECIFIED = 0, |
| 136 | DCCP_RESET_CODE_CLOSED, |
| 137 | DCCP_RESET_CODE_ABORTED, |
| 138 | DCCP_RESET_CODE_NO_CONNECTION, |
| 139 | DCCP_RESET_CODE_PACKET_ERROR, |
| 140 | DCCP_RESET_CODE_OPTION_ERROR, |
| 141 | DCCP_RESET_CODE_MANDATORY_ERROR, |
| 142 | DCCP_RESET_CODE_CONNECTION_REFUSED, |
| 143 | DCCP_RESET_CODE_BAD_SERVICE_CODE, |
| 144 | DCCP_RESET_CODE_TOO_BUSY, |
| 145 | DCCP_RESET_CODE_BAD_INIT_COOKIE, |
| 146 | DCCP_RESET_CODE_AGGRESSION_PENALTY, |
Gerrit Renker | d8ef2c2 | 2007-10-24 10:27:48 -0200 | [diff] [blame] | 147 | |
| 148 | DCCP_MAX_RESET_CODES /* Leave at the end! */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 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, |
Gerrit Renker | a18213d | 2010-09-19 20:08:00 +0200 | [diff] [blame] | 168 | DCCPO_MIN_RX_CCID_SPECIFIC = 128, /* from sender to receiver */ |
| 169 | DCCPO_MAX_RX_CCID_SPECIFIC = 191, |
| 170 | DCCPO_MIN_TX_CCID_SPECIFIC = 192, /* from receiver to sender */ |
| 171 | DCCPO_MAX_TX_CCID_SPECIFIC = 255, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 172 | }; |
Gerrit Renker | b20a9c2 | 2008-11-23 16:02:31 -0800 | [diff] [blame] | 173 | /* maximum size of a single TLV-encoded DCCP option (sans type/len bytes) */ |
| 174 | #define DCCP_SINGLE_OPT_MAXLEN 253 |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 175 | |
Ian McDonald | b83eff6 | 2006-09-22 14:25:36 +1200 | [diff] [blame] | 176 | /* DCCP CCIDS */ |
| 177 | enum { |
| 178 | DCCPC_CCID2 = 2, |
| 179 | DCCPC_CCID3 = 3, |
| 180 | }; |
| 181 | |
Gerrit Renker | c02fdc0 | 2006-11-14 12:48:10 -0200 | [diff] [blame] | 182 | /* DCCP features (RFC 4340 section 6.4) */ |
Gerrit Renker | 7d43d1a0 | 2008-11-04 23:43:47 -0800 | [diff] [blame] | 183 | enum dccp_feature_numbers { |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 184 | DCCPF_RESERVED = 0, |
| 185 | DCCPF_CCID = 1, |
Gerrit Renker | 7d43d1a0 | 2008-11-04 23:43:47 -0800 | [diff] [blame] | 186 | DCCPF_SHORT_SEQNOS = 2, |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 187 | DCCPF_SEQUENCE_WINDOW = 3, |
Gerrit Renker | 7d43d1a0 | 2008-11-04 23:43:47 -0800 | [diff] [blame] | 188 | DCCPF_ECN_INCAPABLE = 4, |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 189 | DCCPF_ACK_RATIO = 5, |
| 190 | DCCPF_SEND_ACK_VECTOR = 6, |
| 191 | DCCPF_SEND_NDP_COUNT = 7, |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 192 | DCCPF_MIN_CSUM_COVER = 8, |
Gerrit Renker | 7d43d1a0 | 2008-11-04 23:43:47 -0800 | [diff] [blame] | 193 | DCCPF_DATA_CHECKSUM = 9, |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 194 | /* 10-127 reserved */ |
| 195 | DCCPF_MIN_CCID_SPECIFIC = 128, |
Gerrit Renker | 7d43d1a0 | 2008-11-04 23:43:47 -0800 | [diff] [blame] | 196 | DCCPF_SEND_LEV_RATE = 192, /* RFC 4342, sec. 8.4 */ |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 197 | DCCPF_MAX_CCID_SPECIFIC = 255, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 198 | }; |
| 199 | |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 200 | /* DCCP socket control message types for cmsg */ |
| 201 | enum dccp_cmsg_type { |
| 202 | DCCP_SCM_PRIORITY = 1, |
| 203 | DCCP_SCM_QPOLICY_MAX = 0xFFFF, |
| 204 | /* ^-- Up to here reserved exclusively for qpolicy parameters */ |
| 205 | DCCP_SCM_MAX |
| 206 | }; |
| 207 | |
| 208 | /* DCCP priorities for outgoing/queued packets */ |
| 209 | enum dccp_packet_dequeueing_policy { |
| 210 | DCCPQ_POLICY_SIMPLE, |
| 211 | DCCPQ_POLICY_PRIO, |
| 212 | DCCPQ_POLICY_MAX |
| 213 | }; |
| 214 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 215 | /* DCCP socket options */ |
Gerrit Renker | 5aed324 | 2006-11-28 19:33:36 -0200 | [diff] [blame] | 216 | #define DCCP_SOCKOPT_PACKET_SIZE 1 /* XXX deprecated, without effect */ |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 217 | #define DCCP_SOCKOPT_SERVICE 2 |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 218 | #define DCCP_SOCKOPT_CHANGE_L 3 |
| 219 | #define DCCP_SOCKOPT_CHANGE_R 4 |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 220 | #define DCCP_SOCKOPT_GET_CUR_MPS 5 |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 221 | #define DCCP_SOCKOPT_SERVER_TIMEWAIT 6 |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 222 | #define DCCP_SOCKOPT_SEND_CSCOV 10 |
| 223 | #define DCCP_SOCKOPT_RECV_CSCOV 11 |
Gerrit Renker | d90ebcb | 2008-11-12 00:47:26 -0800 | [diff] [blame] | 224 | #define DCCP_SOCKOPT_AVAILABLE_CCIDS 12 |
Gerrit Renker | b20a9c2 | 2008-11-23 16:02:31 -0800 | [diff] [blame] | 225 | #define DCCP_SOCKOPT_CCID 13 |
| 226 | #define DCCP_SOCKOPT_TX_CCID 14 |
| 227 | #define DCCP_SOCKOPT_RX_CCID 15 |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 228 | #define DCCP_SOCKOPT_QPOLICY_ID 16 |
| 229 | #define DCCP_SOCKOPT_QPOLICY_TXQLEN 17 |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 230 | #define DCCP_SOCKOPT_CCID_RX_INFO 128 |
| 231 | #define DCCP_SOCKOPT_CCID_TX_INFO 192 |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 232 | |
Gerrit Renker | 09dbc38 | 2006-11-14 12:57:34 -0200 | [diff] [blame] | 233 | /* maximum number of services provided on the same listening port */ |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 234 | #define DCCP_SERVICE_LIST_MAX_LEN 32 |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 235 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 236 | #ifdef __KERNEL__ |
| 237 | |
| 238 | #include <linux/in.h> |
Alexey Dobriyan | a6b7a40 | 2011-06-06 10:43:46 +0000 | [diff] [blame] | 239 | #include <linux/interrupt.h> |
Arnaldo Carvalho de Melo | 19ac214 | 2007-08-19 17:18:33 -0700 | [diff] [blame] | 240 | #include <linux/ktime.h> |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 241 | #include <linux/list.h> |
| 242 | #include <linux/uio.h> |
| 243 | #include <linux/workqueue.h> |
| 244 | |
| 245 | #include <net/inet_connection_sock.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 246 | #include <net/inet_sock.h> |
Arnaldo Carvalho de Melo | 64cf1e5 | 2005-08-09 20:45:21 -0700 | [diff] [blame] | 247 | #include <net/inet_timewait_sock.h> |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 248 | #include <net/tcp_states.h> |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 249 | |
| 250 | enum dccp_state { |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 251 | DCCP_OPEN = TCP_ESTABLISHED, |
| 252 | DCCP_REQUESTING = TCP_SYN_SENT, |
| 253 | DCCP_LISTEN = TCP_LISTEN, |
| 254 | DCCP_RESPOND = TCP_SYN_RECV, |
| 255 | /* |
| 256 | * States involved in closing a DCCP connection: |
| 257 | * 1) ACTIVE_CLOSEREQ is entered by a server sending a CloseReq. |
| 258 | * |
| 259 | * 2) CLOSING can have three different meanings (RFC 4340, 8.3): |
| 260 | * a. Client has performed active-close, has sent a Close to the server |
| 261 | * from state OPEN or PARTOPEN, and is waiting for the final Reset |
| 262 | * (in this case, SOCK_DONE == 1). |
| 263 | * b. Client is asked to perform passive-close, by receiving a CloseReq |
| 264 | * in (PART)OPEN state. It sends a Close and waits for final Reset |
| 265 | * (in this case, SOCK_DONE == 0). |
| 266 | * c. Server performs an active-close as in (a), keeps TIMEWAIT state. |
| 267 | * |
| 268 | * 3) The following intermediate states are employed to give passively |
| 269 | * closing nodes a chance to process their unread data: |
| 270 | * - PASSIVE_CLOSE (from OPEN => CLOSED) and |
| 271 | * - PASSIVE_CLOSEREQ (from (PART)OPEN to CLOSING; case (b) above). |
| 272 | */ |
| 273 | DCCP_ACTIVE_CLOSEREQ = TCP_FIN_WAIT1, |
| 274 | DCCP_PASSIVE_CLOSE = TCP_CLOSE_WAIT, /* any node receiving a Close */ |
| 275 | DCCP_CLOSING = TCP_CLOSING, |
| 276 | DCCP_TIME_WAIT = TCP_TIME_WAIT, |
| 277 | DCCP_CLOSED = TCP_CLOSE, |
| 278 | DCCP_PARTOPEN = TCP_MAX_STATES, |
| 279 | DCCP_PASSIVE_CLOSEREQ, /* clients receiving CloseReq */ |
Gerrit Renker | 9b91ad2 | 2007-11-20 21:56:37 -0200 | [diff] [blame] | 280 | DCCP_MAX_STATES |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 281 | }; |
| 282 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 283 | enum { |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 284 | DCCPF_OPEN = TCPF_ESTABLISHED, |
| 285 | DCCPF_REQUESTING = TCPF_SYN_SENT, |
| 286 | DCCPF_LISTEN = TCPF_LISTEN, |
| 287 | DCCPF_RESPOND = TCPF_SYN_RECV, |
| 288 | DCCPF_ACTIVE_CLOSEREQ = TCPF_FIN_WAIT1, |
| 289 | DCCPF_CLOSING = TCPF_CLOSING, |
| 290 | DCCPF_TIME_WAIT = TCPF_TIME_WAIT, |
| 291 | DCCPF_CLOSED = TCPF_CLOSE, |
| 292 | DCCPF_PARTOPEN = (1 << DCCP_PARTOPEN), |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 293 | }; |
| 294 | |
| 295 | static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb) |
| 296 | { |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 297 | return (struct dccp_hdr *)skb_transport_header(skb); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Gerrit Renker | 9b42078 | 2006-11-10 11:22:32 -0200 | [diff] [blame] | 300 | static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen) |
| 301 | { |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 302 | skb_push(skb, headlen); |
| 303 | skb_reset_transport_header(skb); |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 304 | return memset(skb_transport_header(skb), 0, headlen); |
Gerrit Renker | 9b42078 | 2006-11-10 11:22:32 -0200 | [diff] [blame] | 305 | } |
| 306 | |
Gerrit Renker | fde2010 | 2007-10-24 10:12:09 -0200 | [diff] [blame] | 307 | static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh) |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 308 | { |
Gerrit Renker | fde2010 | 2007-10-24 10:12:09 -0200 | [diff] [blame] | 309 | return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 312 | static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh) |
| 313 | { |
| 314 | return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0); |
| 315 | } |
| 316 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 317 | static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb) |
| 318 | { |
| 319 | const struct dccp_hdr *dh = dccp_hdr(skb); |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 320 | return __dccp_basic_hdr_len(dh); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 321 | } |
| 322 | |
Gerrit Renker | fde2010 | 2007-10-24 10:12:09 -0200 | [diff] [blame] | 323 | static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh) |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 324 | { |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 325 | __u64 seq_nr = ntohs(dh->dccph_seq); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 326 | |
| 327 | if (dh->dccph_x != 0) |
Gerrit Renker | fde2010 | 2007-10-24 10:12:09 -0200 | [diff] [blame] | 328 | seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(dh)->dccph_seq_low); |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 329 | else |
| 330 | seq_nr += (u32)dh->dccph_seq2 << 16; |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 331 | |
| 332 | return seq_nr; |
| 333 | } |
| 334 | |
| 335 | static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb) |
| 336 | { |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 337 | return (struct dccp_hdr_request *)(skb_transport_header(skb) + |
| 338 | dccp_basic_hdr_len(skb)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb) |
| 342 | { |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 343 | return (struct dccp_hdr_ack_bits *)(skb_transport_header(skb) + |
| 344 | dccp_basic_hdr_len(skb)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb) |
| 348 | { |
| 349 | const struct dccp_hdr_ack_bits *dhack = dccp_hdr_ack_bits(skb); |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 350 | 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] | 351 | } |
| 352 | |
| 353 | static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb) |
| 354 | { |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 355 | return (struct dccp_hdr_response *)(skb_transport_header(skb) + |
| 356 | dccp_basic_hdr_len(skb)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb) |
| 360 | { |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 361 | return (struct dccp_hdr_reset *)(skb_transport_header(skb) + |
| 362 | dccp_basic_hdr_len(skb)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 363 | } |
| 364 | |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 365 | static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh) |
| 366 | { |
| 367 | return __dccp_basic_hdr_len(dh) + |
| 368 | dccp_packet_hdr_len(dh->dccph_type); |
| 369 | } |
| 370 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 371 | static inline unsigned int dccp_hdr_len(const struct sk_buff *skb) |
| 372 | { |
Harald Welte | 1d3de41 | 2005-08-09 20:26:55 -0700 | [diff] [blame] | 373 | return __dccp_hdr_len(dccp_hdr(skb)); |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 374 | } |
| 375 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 376 | /** |
Gerrit Renker | b4d4f7c | 2007-12-13 12:37:19 -0200 | [diff] [blame] | 377 | * struct dccp_request_sock - represent DCCP-specific connection request |
| 378 | * @dreq_inet_rsk: structure inherited from |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 379 | * @dreq_iss: initial sequence number, sent on the first Response (RFC 4340, 7.1) |
| 380 | * @dreq_gss: greatest sequence number sent (for retransmitted Responses) |
| 381 | * @dreq_isr: initial sequence number received in the first Request |
| 382 | * @dreq_gsr: greatest sequence number received (for retransmitted Request(s)) |
Gerrit Renker | b4d4f7c | 2007-12-13 12:37:19 -0200 | [diff] [blame] | 383 | * @dreq_service: service code present on the Request (there is just one) |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 384 | * @dreq_featneg: feature negotiation options for this connection |
Gerrit Renker | b4d4f7c | 2007-12-13 12:37:19 -0200 | [diff] [blame] | 385 | * The following two fields are analogous to the ones in dccp_sock: |
| 386 | * @dreq_timestamp_echo: last received timestamp to echo (13.1) |
| 387 | * @dreq_timestamp_echo: the time of receiving the last @dreq_timestamp_echo |
| 388 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 389 | struct dccp_request_sock { |
| 390 | struct inet_request_sock dreq_inet_rsk; |
| 391 | __u64 dreq_iss; |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 392 | __u64 dreq_gss; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 393 | __u64 dreq_isr; |
Samuel Jero | f541fb7 | 2012-02-26 18:22:02 -0700 | [diff] [blame] | 394 | __u64 dreq_gsr; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 395 | __be32 dreq_service; |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 396 | struct list_head dreq_featneg; |
Gerrit Renker | b4d4f7c | 2007-12-13 12:37:19 -0200 | [diff] [blame] | 397 | __u32 dreq_timestamp_echo; |
| 398 | __u32 dreq_timestamp_time; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 399 | }; |
| 400 | |
| 401 | static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req) |
| 402 | { |
| 403 | return (struct dccp_request_sock *)req; |
| 404 | } |
| 405 | |
Arnaldo Carvalho de Melo | 64cf1e5 | 2005-08-09 20:45:21 -0700 | [diff] [blame] | 406 | extern struct inet_timewait_death_row dccp_death_row; |
| 407 | |
Gerrit Renker | 8b81941 | 2007-12-13 12:29:24 -0200 | [diff] [blame] | 408 | extern int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq, |
| 409 | struct sk_buff *skb); |
| 410 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 411 | struct dccp_options_received { |
Gerrit Renker | 5b5d0e7 | 2008-07-13 11:51:40 +0100 | [diff] [blame] | 412 | u64 dccpor_ndp:48; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 413 | u32 dccpor_timestamp; |
| 414 | u32 dccpor_timestamp_echo; |
| 415 | u32 dccpor_elapsed_time; |
| 416 | }; |
| 417 | |
| 418 | struct ccid; |
| 419 | |
| 420 | enum dccp_role { |
| 421 | DCCP_ROLE_UNDEFINED, |
| 422 | DCCP_ROLE_LISTEN, |
| 423 | DCCP_ROLE_CLIENT, |
| 424 | DCCP_ROLE_SERVER, |
| 425 | }; |
| 426 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 427 | struct dccp_service_list { |
| 428 | __u32 dccpsl_nr; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 429 | __be32 dccpsl_list[0]; |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 430 | }; |
| 431 | |
| 432 | #define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1) |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 433 | #define DCCP_SERVICE_CODE_IS_ABSENT 0 |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 434 | |
| 435 | 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] | 436 | const __be32 service) |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 437 | { |
| 438 | if (likely(sl != NULL)) { |
| 439 | u32 i = sl->dccpsl_nr; |
| 440 | while (i--) |
| 441 | if (sl->dccpsl_list[i] == service) |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 442 | return 1; |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 443 | } |
| 444 | return 0; |
| 445 | } |
| 446 | |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 447 | struct dccp_ackvec; |
| 448 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 449 | /** |
| 450 | * struct dccp_sock - DCCP socket state |
| 451 | * |
| 452 | * @dccps_swl - sequence number window low |
| 453 | * @dccps_swh - sequence number window high |
| 454 | * @dccps_awl - acknowledgement number window low |
| 455 | * @dccps_awh - acknowledgement number window high |
| 456 | * @dccps_iss - initial sequence number sent |
| 457 | * @dccps_isr - initial sequence number received |
| 458 | * @dccps_osr - first OPEN sequence number received |
| 459 | * @dccps_gss - greatest sequence number sent |
| 460 | * @dccps_gsr - greatest valid sequence number received |
| 461 | * @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss |
Gerrit Renker | 09dbc38 | 2006-11-14 12:57:34 -0200 | [diff] [blame] | 462 | * @dccps_service - first (passive sock) or unique (active sock) service code |
| 463 | * @dccps_service_list - second .. last service code on passive socket |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 464 | * @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option |
Gerrit Renker | b4d4f7c | 2007-12-13 12:37:19 -0200 | [diff] [blame] | 465 | * @dccps_timestamp_time - time of receiving latest @dccps_timestamp_echo |
Gerrit Renker | 91d73c1 | 2007-04-20 13:57:21 -0700 | [diff] [blame] | 466 | * @dccps_l_ack_ratio - feature-local Ack Ratio |
| 467 | * @dccps_r_ack_ratio - feature-remote Ack Ratio |
Gerrit Renker | 792b487 | 2009-01-16 23:36:31 +0000 | [diff] [blame] | 468 | * @dccps_l_seq_win - local Sequence Window (influences ack number validity) |
| 469 | * @dccps_r_seq_win - remote Sequence Window (influences seq number validity) |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 470 | * @dccps_pcslen - sender partial checksum coverage (via sockopt) |
| 471 | * @dccps_pcrlen - receiver partial checksum coverage (via sockopt) |
Gerrit Renker | 4098dce | 2008-12-08 01:18:37 -0800 | [diff] [blame] | 472 | * @dccps_send_ndp_count - local Send NDP Count feature (7.7.2) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 473 | * @dccps_ndp_count - number of Non Data Packets since last data packet |
Gerrit Renker | 91d73c1 | 2007-04-20 13:57:21 -0700 | [diff] [blame] | 474 | * @dccps_mss_cache - current value of MSS (path MTU minus header sizes) |
Gerrit Renker | a94f0f9 | 2007-09-26 11:31:49 -0300 | [diff] [blame] | 475 | * @dccps_rate_last - timestamp for rate-limiting DCCP-Sync (RFC 4340, 7.5.4) |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 476 | * @dccps_featneg - tracks feature-negotiation state (mostly during handshake) |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 477 | * @dccps_hc_rx_ackvec - rx half connection ack vector |
Gerrit Renker | 91d73c1 | 2007-04-20 13:57:21 -0700 | [diff] [blame] | 478 | * @dccps_hc_rx_ccid - CCID used for the receiver (or receiving half-connection) |
| 479 | * @dccps_hc_tx_ccid - CCID used for the sender (or sending half-connection) |
| 480 | * @dccps_options_received - parsed set of retrieved options |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 481 | * @dccps_qpolicy - TX dequeueing policy, one of %dccp_packet_dequeueing_policy |
| 482 | * @dccps_tx_qlen - maximum length of the TX queue |
Gerrit Renker | 91d73c1 | 2007-04-20 13:57:21 -0700 | [diff] [blame] | 483 | * @dccps_role - role of this sock, one of %dccp_role |
| 484 | * @dccps_hc_rx_insert_options - receiver wants to add options when acking |
| 485 | * @dccps_hc_tx_insert_options - sender wants to add options when sending |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 486 | * @dccps_server_timewait - server holds timewait state on close (RFC 4340, 8.3) |
Gerrit Renker | d83447f | 2010-11-14 17:25:46 +0100 | [diff] [blame] | 487 | * @dccps_sync_scheduled - flag which signals "send out-of-band message soon" |
Gerrit Renker | dc841e3 | 2010-10-27 19:16:26 +0000 | [diff] [blame] | 488 | * @dccps_xmitlet - tasklet scheduled by the TX CCID to dequeue data packets |
| 489 | * @dccps_xmit_timer - used by the TX CCID to delay sending (rate-based pacing) |
Gerrit Renker | 89560b5 | 2007-03-20 15:27:17 -0300 | [diff] [blame] | 490 | * @dccps_syn_rtt - RTT sample from Request/Response exchange (in usecs) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 491 | */ |
| 492 | struct dccp_sock { |
| 493 | /* inet_connection_sock has to be the first member of dccp_sock */ |
| 494 | struct inet_connection_sock dccps_inet_connection; |
Gerrit Renker | 89560b5 | 2007-03-20 15:27:17 -0300 | [diff] [blame] | 495 | #define dccps_syn_rtt dccps_inet_connection.icsk_ack.lrcvtime |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 496 | __u64 dccps_swl; |
| 497 | __u64 dccps_swh; |
| 498 | __u64 dccps_awl; |
| 499 | __u64 dccps_awh; |
| 500 | __u64 dccps_iss; |
| 501 | __u64 dccps_isr; |
| 502 | __u64 dccps_osr; |
| 503 | __u64 dccps_gss; |
| 504 | __u64 dccps_gsr; |
| 505 | __u64 dccps_gar; |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 506 | __be32 dccps_service; |
Arnaldo Carvalho de Melo | cf6b5fbe | 2008-02-03 04:07:48 -0800 | [diff] [blame] | 507 | __u32 dccps_mss_cache; |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 508 | struct dccp_service_list *dccps_service_list; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 509 | __u32 dccps_timestamp_echo; |
Gerrit Renker | b4d4f7c | 2007-12-13 12:37:19 -0200 | [diff] [blame] | 510 | __u32 dccps_timestamp_time; |
Andrea Bittau | 2a91aa3 | 2006-03-20 17:41:47 -0800 | [diff] [blame] | 511 | __u16 dccps_l_ack_ratio; |
| 512 | __u16 dccps_r_ack_ratio; |
Gerrit Renker | 792b487 | 2009-01-16 23:36:31 +0000 | [diff] [blame] | 513 | __u64 dccps_l_seq_win:48; |
| 514 | __u64 dccps_r_seq_win:48; |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 515 | __u8 dccps_pcslen:4; |
| 516 | __u8 dccps_pcrlen:4; |
Gerrit Renker | 4098dce | 2008-12-08 01:18:37 -0800 | [diff] [blame] | 517 | __u8 dccps_send_ndp_count:1; |
Gerrit Renker | 5b5d0e7 | 2008-07-13 11:51:40 +0100 | [diff] [blame] | 518 | __u64 dccps_ndp_count:48; |
Gerrit Renker | a94f0f9 | 2007-09-26 11:31:49 -0300 | [diff] [blame] | 519 | unsigned long dccps_rate_last; |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 520 | struct list_head dccps_featneg; |
Arnaldo Carvalho de Melo | ae31c33 | 2005-09-18 00:17:51 -0700 | [diff] [blame] | 521 | struct dccp_ackvec *dccps_hc_rx_ackvec; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 522 | struct ccid *dccps_hc_rx_ccid; |
| 523 | struct ccid *dccps_hc_tx_ccid; |
| 524 | struct dccp_options_received dccps_options_received; |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 525 | __u8 dccps_qpolicy; |
| 526 | __u32 dccps_tx_qlen; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 527 | enum dccp_role dccps_role:2; |
Arnaldo Carvalho de Melo | 507d37c | 2005-09-09 02:30:07 -0300 | [diff] [blame] | 528 | __u8 dccps_hc_rx_insert_options:1; |
| 529 | __u8 dccps_hc_tx_insert_options:1; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 530 | __u8 dccps_server_timewait:1; |
Gerrit Renker | d83447f | 2010-11-14 17:25:46 +0100 | [diff] [blame] | 531 | __u8 dccps_sync_scheduled:1; |
Gerrit Renker | dc841e3 | 2010-10-27 19:16:26 +0000 | [diff] [blame] | 532 | struct tasklet_struct dccps_xmitlet; |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 533 | struct timer_list dccps_xmit_timer; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 534 | }; |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 535 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 536 | static inline struct dccp_sock *dccp_sk(const struct sock *sk) |
| 537 | { |
| 538 | return (struct dccp_sock *)sk; |
| 539 | } |
| 540 | |
| 541 | static inline const char *dccp_role(const struct sock *sk) |
| 542 | { |
| 543 | switch (dccp_sk(sk)->dccps_role) { |
| 544 | case DCCP_ROLE_UNDEFINED: return "undefined"; |
| 545 | case DCCP_ROLE_LISTEN: return "listen"; |
| 546 | case DCCP_ROLE_SERVER: return "server"; |
| 547 | case DCCP_ROLE_CLIENT: return "client"; |
| 548 | } |
| 549 | return NULL; |
| 550 | } |
| 551 | |
Harald Welte | 5a47a47 | 2005-08-09 20:26:03 -0700 | [diff] [blame] | 552 | #endif /* __KERNEL__ */ |
| 553 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 554 | #endif /* _LINUX_DCCP_H */ |