1#ifndef _LINUX_DCCP_H
2#define _LINUX_DCCP_H
3
4#include <linux/types.h>
5#include <asm/byteorder.h>
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20struct dccp_hdr {
21 __be16 dccph_sport,
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 __sum16 dccph_checksum;
34#if defined(__LITTLE_ENDIAN_BITFIELD)
35 __u8 dccph_x:1,
36 dccph_type:4,
37 dccph_reserved:3;
38#elif defined(__BIG_ENDIAN_BITFIELD)
39 __u8 dccph_reserved:3,
40 dccph_type:4,
41 dccph_x:1;
42#else
43#error "Adjust your <asm/byteorder.h> defines"
44#endif
45 __u8 dccph_seq2;
46 __be16 dccph_seq;
47};
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53
54struct dccp_hdr_ext {
55 __be32 dccph_seq_low;
56};
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63struct dccp_hdr_request {
64 __be32 dccph_req_service;
65};
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72struct dccp_hdr_ack_bits {
73 __be16 dccph_reserved1;
74 __be16 dccph_ack_nr_high;
75 __be32 dccph_ack_nr_low;
76};
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83struct dccp_hdr_response {
84 struct dccp_hdr_ack_bits dccph_resp_ack;
85 __be32 dccph_resp_service;
86};
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95struct dccp_hdr_reset {
96 struct dccp_hdr_ack_bits dccph_reset_ack;
97 __u8 dccph_reset_code,
98 dccph_reset_data[3];
99};
100
101enum 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
117static 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}
134enum 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,
147
148 DCCP_MAX_RESET_CODES
149};
150
151
152enum {
153 DCCPO_PADDING = 0,
154 DCCPO_MANDATORY = 1,
155 DCCPO_MIN_RESERVED = 3,
156 DCCPO_MAX_RESERVED = 31,
157 DCCPO_CHANGE_L = 32,
158 DCCPO_CONFIRM_L = 33,
159 DCCPO_CHANGE_R = 34,
160 DCCPO_CONFIRM_R = 35,
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_RX_CCID_SPECIFIC = 128,
169 DCCPO_MAX_RX_CCID_SPECIFIC = 191,
170 DCCPO_MIN_TX_CCID_SPECIFIC = 192,
171 DCCPO_MAX_TX_CCID_SPECIFIC = 255,
172};
173
174#define DCCP_SINGLE_OPT_MAXLEN 253
175
176
177enum {
178 DCCPC_CCID2 = 2,
179 DCCPC_CCID3 = 3,
180};
181
182
183enum dccp_feature_numbers {
184 DCCPF_RESERVED = 0,
185 DCCPF_CCID = 1,
186 DCCPF_SHORT_SEQNOS = 2,
187 DCCPF_SEQUENCE_WINDOW = 3,
188 DCCPF_ECN_INCAPABLE = 4,
189 DCCPF_ACK_RATIO = 5,
190 DCCPF_SEND_ACK_VECTOR = 6,
191 DCCPF_SEND_NDP_COUNT = 7,
192 DCCPF_MIN_CSUM_COVER = 8,
193 DCCPF_DATA_CHECKSUM = 9,
194
195 DCCPF_MIN_CCID_SPECIFIC = 128,
196 DCCPF_SEND_LEV_RATE = 192,
197 DCCPF_MAX_CCID_SPECIFIC = 255,
198};
199
200
201enum dccp_cmsg_type {
202 DCCP_SCM_PRIORITY = 1,
203 DCCP_SCM_QPOLICY_MAX = 0xFFFF,
204
205 DCCP_SCM_MAX
206};
207
208
209enum dccp_packet_dequeueing_policy {
210 DCCPQ_POLICY_SIMPLE,
211 DCCPQ_POLICY_PRIO,
212 DCCPQ_POLICY_MAX
213};
214
215
216#define DCCP_SOCKOPT_PACKET_SIZE 1
217#define DCCP_SOCKOPT_SERVICE 2
218#define DCCP_SOCKOPT_CHANGE_L 3
219#define DCCP_SOCKOPT_CHANGE_R 4
220#define DCCP_SOCKOPT_GET_CUR_MPS 5
221#define DCCP_SOCKOPT_SERVER_TIMEWAIT 6
222#define DCCP_SOCKOPT_SEND_CSCOV 10
223#define DCCP_SOCKOPT_RECV_CSCOV 11
224#define DCCP_SOCKOPT_AVAILABLE_CCIDS 12
225#define DCCP_SOCKOPT_CCID 13
226#define DCCP_SOCKOPT_TX_CCID 14
227#define DCCP_SOCKOPT_RX_CCID 15
228#define DCCP_SOCKOPT_QPOLICY_ID 16
229#define DCCP_SOCKOPT_QPOLICY_TXQLEN 17
230#define DCCP_SOCKOPT_CCID_RX_INFO 128
231#define DCCP_SOCKOPT_CCID_TX_INFO 192
232
233
234#define DCCP_SERVICE_LIST_MAX_LEN 32
235
236#ifdef __KERNEL__
237
238#include <linux/in.h>
239#include <linux/interrupt.h>
240#include <linux/ktime.h>
241#include <linux/list.h>
242#include <linux/uio.h>
243#include <linux/workqueue.h>
244
245#include <net/inet_connection_sock.h>
246#include <net/inet_sock.h>
247#include <net/inet_timewait_sock.h>
248#include <net/tcp_states.h>
249
250enum dccp_state {
251 DCCP_OPEN = TCP_ESTABLISHED,
252 DCCP_REQUESTING = TCP_SYN_SENT,
253 DCCP_LISTEN = TCP_LISTEN,
254 DCCP_RESPOND = TCP_SYN_RECV,
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273 DCCP_ACTIVE_CLOSEREQ = TCP_FIN_WAIT1,
274 DCCP_PASSIVE_CLOSE = TCP_CLOSE_WAIT,
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,
280 DCCP_MAX_STATES
281};
282
283enum {
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),
293};
294
295static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb)
296{
297 return (struct dccp_hdr *)skb_transport_header(skb);
298}
299
300static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen)
301{
302 skb_push(skb, headlen);
303 skb_reset_transport_header(skb);
304 return memset(skb_transport_header(skb), 0, headlen);
305}
306
307static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh)
308{
309 return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh));
310}
311
312static 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
317static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb)
318{
319 const struct dccp_hdr *dh = dccp_hdr(skb);
320 return __dccp_basic_hdr_len(dh);
321}
322
323static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh)
324{
325 __u64 seq_nr = ntohs(dh->dccph_seq);
326
327 if (dh->dccph_x != 0)
328 seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(dh)->dccph_seq_low);
329 else
330 seq_nr += (u32)dh->dccph_seq2 << 16;
331
332 return seq_nr;
333}
334
335static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb)
336{
337 return (struct dccp_hdr_request *)(skb_transport_header(skb) +
338 dccp_basic_hdr_len(skb));
339}
340
341static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb)
342{
343 return (struct dccp_hdr_ack_bits *)(skb_transport_header(skb) +
344 dccp_basic_hdr_len(skb));
345}
346
347static 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);
350 return ((u64)ntohs(dhack->dccph_ack_nr_high) << 32) + ntohl(dhack->dccph_ack_nr_low);
351}
352
353static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb)
354{
355 return (struct dccp_hdr_response *)(skb_transport_header(skb) +
356 dccp_basic_hdr_len(skb));
357}
358
359static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb)
360{
361 return (struct dccp_hdr_reset *)(skb_transport_header(skb) +
362 dccp_basic_hdr_len(skb));
363}
364
365static 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
371static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
372{
373 return __dccp_hdr_len(dccp_hdr(skb));
374}
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387struct dccp_request_sock {
388 struct inet_request_sock dreq_inet_rsk;
389 __u64 dreq_iss;
390 __u64 dreq_isr;
391 __be32 dreq_service;
392 struct list_head dreq_featneg;
393 __u32 dreq_timestamp_echo;
394 __u32 dreq_timestamp_time;
395};
396
397static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req)
398{
399 return (struct dccp_request_sock *)req;
400}
401
402extern struct inet_timewait_death_row dccp_death_row;
403
404extern int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
405 struct sk_buff *skb);
406
407struct dccp_options_received {
408 u64 dccpor_ndp:48;
409 u32 dccpor_timestamp;
410 u32 dccpor_timestamp_echo;
411 u32 dccpor_elapsed_time;
412};
413
414struct ccid;
415
416enum dccp_role {
417 DCCP_ROLE_UNDEFINED,
418 DCCP_ROLE_LISTEN,
419 DCCP_ROLE_CLIENT,
420 DCCP_ROLE_SERVER,
421};
422
423struct dccp_service_list {
424 __u32 dccpsl_nr;
425 __be32 dccpsl_list[0];
426};
427
428#define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1)
429#define DCCP_SERVICE_CODE_IS_ABSENT 0
430
431static inline int dccp_list_has_service(const struct dccp_service_list *sl,
432 const __be32 service)
433{
434 if (likely(sl != NULL)) {
435 u32 i = sl->dccpsl_nr;
436 while (i--)
437 if (sl->dccpsl_list[i] == service)
438 return 1;
439 }
440 return 0;
441}
442
443struct dccp_ackvec;
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488struct dccp_sock {
489
490 struct inet_connection_sock dccps_inet_connection;
491#define dccps_syn_rtt dccps_inet_connection.icsk_ack.lrcvtime
492 __u64 dccps_swl;
493 __u64 dccps_swh;
494 __u64 dccps_awl;
495 __u64 dccps_awh;
496 __u64 dccps_iss;
497 __u64 dccps_isr;
498 __u64 dccps_osr;
499 __u64 dccps_gss;
500 __u64 dccps_gsr;
501 __u64 dccps_gar;
502 __be32 dccps_service;
503 __u32 dccps_mss_cache;
504 struct dccp_service_list *dccps_service_list;
505 __u32 dccps_timestamp_echo;
506 __u32 dccps_timestamp_time;
507 __u16 dccps_l_ack_ratio;
508 __u16 dccps_r_ack_ratio;
509 __u64 dccps_l_seq_win:48;
510 __u64 dccps_r_seq_win:48;
511 __u8 dccps_pcslen:4;
512 __u8 dccps_pcrlen:4;
513 __u8 dccps_send_ndp_count:1;
514 __u64 dccps_ndp_count:48;
515 unsigned long dccps_rate_last;
516 struct list_head dccps_featneg;
517 struct dccp_ackvec *dccps_hc_rx_ackvec;
518 struct ccid *dccps_hc_rx_ccid;
519 struct ccid *dccps_hc_tx_ccid;
520 struct dccp_options_received dccps_options_received;
521 __u8 dccps_qpolicy;
522 __u32 dccps_tx_qlen;
523 enum dccp_role dccps_role:2;
524 __u8 dccps_hc_rx_insert_options:1;
525 __u8 dccps_hc_tx_insert_options:1;
526 __u8 dccps_server_timewait:1;
527 __u8 dccps_sync_scheduled:1;
528 struct tasklet_struct dccps_xmitlet;
529 struct timer_list dccps_xmit_timer;
530};
531
532static inline struct dccp_sock *dccp_sk(const struct sock *sk)
533{
534 return (struct dccp_sock *)sk;
535}
536
537static inline const char *dccp_role(const struct sock *sk)
538{
539 switch (dccp_sk(sk)->dccps_role) {
540 case DCCP_ROLE_UNDEFINED: return "undefined";
541 case DCCP_ROLE_LISTEN: return "listen";
542 case DCCP_ROLE_SERVER: return "server";
543 case DCCP_ROLE_CLIENT: return "client";
544 }
545 return NULL;
546}
547
548#endif
549
550#endif
551