4 #include <linux/types.h>
5 #include <asm/byteorder.h>
7 /* Structure describing an Internet (DCCP) socket address. */
9 __u16 sdccp_family; /* Address family */
10 __u16 sdccp_port; /* Port number */
11 __u32 sdccp_addr; /* Internet address */
12 __u32 sdccp_service; /* Service */
13 /* Pad to size of `struct sockaddr': 16 bytes . */
18 * struct dccp_hdr - generic part of DCCP packet header
20 * @dccph_sport - Relevant port on the endpoint that sent this packet
21 * @dccph_dport - Relevant port on the other endpoint
22 * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
23 * @dccph_ccval - Used by the HC-Sender CCID
24 * @dccph_cscov - Parts of the packet that are covered by the Checksum field
25 * @dccph_checksum - Internet checksum, depends on dccph_cscov
26 * @dccph_x - 0 = 24 bit sequence number, 1 = 48
27 * @dccph_type - packet type, see DCCP_PKT_ prefixed macros
28 * @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x
34 #if defined(__LITTLE_ENDIAN_BITFIELD)
37 #elif defined(__BIG_ENDIAN_BITFIELD)
41 #error "Adjust your <asm/byteorder.h> defines"
44 #if defined(__LITTLE_ENDIAN_BITFIELD)
49 #elif defined(__BIG_ENDIAN_BITFIELD)
50 __u32 dccph_reserved:3,
55 #error "Adjust your <asm/byteorder.h> defines"
60 * struct dccp_hdr_ext - the low bits of a 48 bit seq packet
62 * @dccph_seq_low - low 24 bits of a 48 bit seq packet
69 * struct dccp_hdr_request - Conection initiation request header
71 * @dccph_req_service - Service to which the client app wants to connect
72 * @dccph_req_options - list of options (must be a multiple of 32 bits
74 struct dccp_hdr_request {
75 __u32 dccph_req_service;
78 * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets
80 * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
81 * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
83 struct dccp_hdr_ack_bits {
84 __u32 dccph_reserved1:8,
86 __u32 dccph_ack_nr_low;
89 * struct dccp_hdr_response - Conection initiation response header
91 * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
92 * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
93 * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
94 * @dccph_resp_options - list of options (must be a multiple of 32 bits
96 struct dccp_hdr_response {
97 struct dccp_hdr_ack_bits dccph_resp_ack;
98 __u32 dccph_resp_service;
102 * struct dccp_hdr_reset - Unconditionally shut down a connection
104 * @dccph_reset_service - Echoes the Service Code on a received DCCP-Request
105 * @dccph_reset_options - list of options (must be a multiple of 32 bits
107 struct dccp_hdr_reset {
108 struct dccp_hdr_ack_bits dccph_reset_ack;
109 __u8 dccph_reset_code,
114 DCCP_PKT_REQUEST = 0,
127 #define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID
129 static inline unsigned int dccp_packet_hdr_len(const __u8 type)
131 if (type == DCCP_PKT_DATA)
133 if (type == DCCP_PKT_DATAACK ||
134 type == DCCP_PKT_ACK ||
135 type == DCCP_PKT_SYNC ||
136 type == DCCP_PKT_SYNCACK ||
137 type == DCCP_PKT_CLOSE ||
138 type == DCCP_PKT_CLOSEREQ)
139 return sizeof(struct dccp_hdr_ack_bits);
140 if (type == DCCP_PKT_REQUEST)
141 return sizeof(struct dccp_hdr_request);
142 if (type == DCCP_PKT_RESPONSE)
143 return sizeof(struct dccp_hdr_response);
144 return sizeof(struct dccp_hdr_reset);
146 enum dccp_reset_codes {
147 DCCP_RESET_CODE_UNSPECIFIED = 0,
148 DCCP_RESET_CODE_CLOSED,
149 DCCP_RESET_CODE_ABORTED,
150 DCCP_RESET_CODE_NO_CONNECTION,
151 DCCP_RESET_CODE_PACKET_ERROR,
152 DCCP_RESET_CODE_OPTION_ERROR,
153 DCCP_RESET_CODE_MANDATORY_ERROR,
154 DCCP_RESET_CODE_CONNECTION_REFUSED,
155 DCCP_RESET_CODE_BAD_SERVICE_CODE,
156 DCCP_RESET_CODE_TOO_BUSY,
157 DCCP_RESET_CODE_BAD_INIT_COOKIE,
158 DCCP_RESET_CODE_AGGRESSION_PENALTY,
165 DCCPO_MIN_RESERVED = 3,
166 DCCPO_MAX_RESERVED = 31,
167 DCCPO_NDP_COUNT = 37,
168 DCCPO_ACK_VECTOR_0 = 38,
169 DCCPO_ACK_VECTOR_1 = 39,
170 DCCPO_TIMESTAMP = 41,
171 DCCPO_TIMESTAMP_ECHO = 42,
172 DCCPO_ELAPSED_TIME = 43,
174 DCCPO_MIN_CCID_SPECIFIC = 128,
175 DCCPO_MAX_CCID_SPECIFIC = 255,
181 DCCPF_SEQUENCE_WINDOW = 3,
182 DCCPF_SEND_ACK_VECTOR = 6,
183 DCCPF_SEND_NDP_COUNT = 7,
184 /* 10-127 reserved */
185 DCCPF_MIN_CCID_SPECIFIC = 128,
186 DCCPF_MAX_CCID_SPECIFIC = 255,
191 #include <linux/in.h>
192 #include <linux/list.h>
193 #include <linux/uio.h>
194 #include <linux/workqueue.h>
196 #include <net/inet_connection_sock.h>
197 #include <net/inet_timewait_sock.h>
198 #include <net/sock.h>
199 #include <net/tcp_states.h>
203 DCCP_OPEN = TCP_ESTABLISHED,
204 DCCP_REQUESTING = TCP_SYN_SENT,
205 DCCP_PARTOPEN = TCP_FIN_WAIT1, /* FIXME:
206 This mapping is horrible, but TCP has
207 no matching state for DCCP_PARTOPEN,
208 as TCP_SYN_RECV is already used by
209 DCCP_RESPOND, why don't stop using TCP
210 mapping of states? OK, now we don't use
211 sk_stream_sendmsg anymore, so doesn't
212 seem to exist any reason for us to
213 do the TCP mapping here */
214 DCCP_LISTEN = TCP_LISTEN,
215 DCCP_RESPOND = TCP_SYN_RECV,
216 DCCP_CLOSING = TCP_CLOSING,
217 DCCP_TIME_WAIT = TCP_TIME_WAIT,
218 DCCP_CLOSED = TCP_CLOSE,
219 DCCP_MAX_STATES = TCP_MAX_STATES,
222 #define DCCP_STATE_MASK 0xf
223 #define DCCP_ACTION_FIN (1<<7)
226 DCCPF_OPEN = TCPF_ESTABLISHED,
227 DCCPF_REQUESTING = TCPF_SYN_SENT,
228 DCCPF_PARTOPEN = TCPF_FIN_WAIT1,
229 DCCPF_LISTEN = TCPF_LISTEN,
230 DCCPF_RESPOND = TCPF_SYN_RECV,
231 DCCPF_CLOSING = TCPF_CLOSING,
232 DCCPF_TIME_WAIT = TCPF_TIME_WAIT,
233 DCCPF_CLOSED = TCPF_CLOSE,
236 static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb)
238 return (struct dccp_hdr *)skb->h.raw;
241 static inline struct dccp_hdr_ext *dccp_hdrx(const struct sk_buff *skb)
243 return (struct dccp_hdr_ext *)(skb->h.raw + sizeof(struct dccp_hdr));
246 static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh)
248 return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0);
251 static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb)
253 const struct dccp_hdr *dh = dccp_hdr(skb);
254 return __dccp_basic_hdr_len(dh);
257 static inline __u64 dccp_hdr_seq(const struct sk_buff *skb)
259 const struct dccp_hdr *dh = dccp_hdr(skb);
260 #if defined(__LITTLE_ENDIAN_BITFIELD)
261 __u64 seq_nr = ntohl(dh->dccph_seq << 8);
262 #elif defined(__BIG_ENDIAN_BITFIELD)
263 __u64 seq_nr = ntohl(dh->dccph_seq);
265 #error "Adjust your <asm/byteorder.h> defines"
268 if (dh->dccph_x != 0)
269 seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(skb)->dccph_seq_low);
274 static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb)
276 return (struct dccp_hdr_request *)(skb->h.raw + dccp_basic_hdr_len(skb));
279 static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb)
281 return (struct dccp_hdr_ack_bits *)(skb->h.raw + dccp_basic_hdr_len(skb));
284 static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb)
286 const struct dccp_hdr_ack_bits *dhack = dccp_hdr_ack_bits(skb);
287 #if defined(__LITTLE_ENDIAN_BITFIELD)
288 return (((u64)ntohl(dhack->dccph_ack_nr_high << 8)) << 32) + ntohl(dhack->dccph_ack_nr_low);
289 #elif defined(__BIG_ENDIAN_BITFIELD)
290 return (((u64)ntohl(dhack->dccph_ack_nr_high)) << 32) + ntohl(dhack->dccph_ack_nr_low);
292 #error "Adjust your <asm/byteorder.h> defines"
296 static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb)
298 return (struct dccp_hdr_response *)(skb->h.raw + dccp_basic_hdr_len(skb));
301 static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb)
303 return (struct dccp_hdr_reset *)(skb->h.raw + dccp_basic_hdr_len(skb));
306 static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh)
308 return __dccp_basic_hdr_len(dh) +
309 dccp_packet_hdr_len(dh->dccph_type);
312 static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
314 return __dccp_hdr_len(dccp_hdr(skb));
318 /* initial values for each feature */
319 #define DCCPF_INITIAL_SEQUENCE_WINDOW 100
320 /* FIXME: for now we're using CCID 3 (TFRC) */
321 #define DCCPF_INITIAL_CCID 3
322 #define DCCPF_INITIAL_SEND_ACK_VECTOR 0
323 /* FIXME: for now we're default to 1 but it should really be 0 */
324 #define DCCPF_INITIAL_SEND_NDP_COUNT 1
326 #define DCCP_NDP_LIMIT 0xFFFFFF
329 * struct dccp_options - option values for a DCCP connection
330 * @dccpo_sequence_window - Sequence Window Feature (section 7.5.2)
331 * @dccpo_ccid - Congestion Control Id (CCID) (section 10)
332 * @dccpo_send_ack_vector - Send Ack Vector Feature (section 11.5)
333 * @dccpo_send_ndp_count - Send NDP Count Feature (7.7.2)
335 struct dccp_options {
336 __u64 dccpo_sequence_window;
338 __u8 dccpo_send_ack_vector;
339 __u8 dccpo_send_ndp_count;
342 extern void __dccp_options_init(struct dccp_options *dccpo);
343 extern void dccp_options_init(struct dccp_options *dccpo);
344 extern int dccp_parse_options(struct sock *sk, struct sk_buff *skb);
346 struct dccp_request_sock {
347 struct inet_request_sock dreq_inet_rsk;
353 static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req)
355 return (struct dccp_request_sock *)req;
358 extern struct inet_timewait_death_row dccp_death_row;
360 /* Read about the ECN nonce to see why it is 253 */
361 #define DCCP_MAX_ACK_VECTOR_LEN 253
363 struct dccp_options_received {
365 dccpor_ack_vector_len:8;
366 u32 dccpor_ack_vector_idx:10;
367 /* 22 bits hole, try to pack */
368 u32 dccpor_timestamp;
369 u32 dccpor_timestamp_echo;
370 u32 dccpor_elapsed_time;
383 * struct dccp_sock - DCCP socket state
385 * @dccps_swl - sequence number window low
386 * @dccps_swh - sequence number window high
387 * @dccps_awl - acknowledgement number window low
388 * @dccps_awh - acknowledgement number window high
389 * @dccps_iss - initial sequence number sent
390 * @dccps_isr - initial sequence number received
391 * @dccps_osr - first OPEN sequence number received
392 * @dccps_gss - greatest sequence number sent
393 * @dccps_gsr - greatest valid sequence number received
394 * @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss
395 * @dccps_timestamp_time - time of latest TIMESTAMP option
396 * @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option
397 * @dccps_ext_header_len - network protocol overhead (IP/IPv6 options)
398 * @dccps_pmtu_cookie - Last pmtu seen by socket
399 * @dccps_avg_packet_size - FIXME: has to be set by the app thru some setsockopt or ioctl, CCID3 uses it
400 * @dccps_role - Role of this sock, one of %dccp_role
401 * @dccps_ndp_count - number of Non Data Packets since last data packet
402 * @dccps_hc_rx_ackpkts - receiver half connection acked packets
405 /* inet_connection_sock has to be the first member of dccp_sock */
406 struct inet_connection_sock dccps_inet_connection;
417 unsigned long dccps_service;
418 struct timeval dccps_timestamp_time;
419 __u32 dccps_timestamp_echo;
420 __u32 dccps_avg_packet_size;
421 unsigned long dccps_ndp_count;
422 __u16 dccps_ext_header_len;
423 __u32 dccps_pmtu_cookie;
424 __u32 dccps_mss_cache;
425 struct dccp_options dccps_options;
426 struct dccp_ackpkts *dccps_hc_rx_ackpkts;
427 void *dccps_hc_rx_ccid_private;
428 void *dccps_hc_tx_ccid_private;
429 struct ccid *dccps_hc_rx_ccid;
430 struct ccid *dccps_hc_tx_ccid;
431 struct dccp_options_received dccps_options_received;
432 enum dccp_role dccps_role:2;
435 static inline struct dccp_sock *dccp_sk(const struct sock *sk)
437 return (struct dccp_sock *)sk;
440 static inline const char *dccp_role(const struct sock *sk)
442 switch (dccp_sk(sk)->dccps_role) {
443 case DCCP_ROLE_UNDEFINED: return "undefined";
444 case DCCP_ROLE_LISTEN: return "listen";
445 case DCCP_ROLE_SERVER: return "server";
446 case DCCP_ROLE_CLIENT: return "client";
451 #endif /* __KERNEL__ */
453 #endif /* _LINUX_DCCP_H */