2005-08-10 03:14:34 +00:00
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#ifndef _LINUX_DCCP_H
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#define _LINUX_DCCP_H
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#include <linux/types.h>
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2005-08-10 03:26:03 +00:00
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#include <asm/byteorder.h>
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2005-08-10 03:14:34 +00:00
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/**
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* struct dccp_hdr - generic part of DCCP packet header
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*
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* @dccph_sport - Relevant port on the endpoint that sent this packet
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* @dccph_dport - Relevant port on the other endpoint
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* @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
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* @dccph_ccval - Used by the HC-Sender CCID
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* @dccph_cscov - Parts of the packet that are covered by the Checksum field
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* @dccph_checksum - Internet checksum, depends on dccph_cscov
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* @dccph_x - 0 = 24 bit sequence number, 1 = 48
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* @dccph_type - packet type, see DCCP_PKT_ prefixed macros
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* @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x
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*/
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struct dccp_hdr {
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2006-03-21 03:23:32 +00:00
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__be16 dccph_sport,
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2005-08-10 03:14:34 +00:00
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dccph_dport;
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__u8 dccph_doff;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 dccph_cscov:4,
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dccph_ccval:4;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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__u8 dccph_ccval:4,
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dccph_cscov:4;
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#else
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#error "Adjust your <asm/byteorder.h> defines"
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#endif
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2006-11-15 05:24:30 +00:00
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__sum16 dccph_checksum;
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2005-08-10 03:14:34 +00:00
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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2006-03-21 03:23:32 +00:00
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__u8 dccph_x:1,
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dccph_type:4,
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dccph_reserved:3;
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2005-08-10 03:14:34 +00:00
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#elif defined(__BIG_ENDIAN_BITFIELD)
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2006-03-21 03:23:32 +00:00
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__u8 dccph_reserved:3,
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2005-08-10 03:14:34 +00:00
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dccph_type:4,
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2006-03-21 03:23:32 +00:00
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dccph_x:1;
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2005-08-10 03:14:34 +00:00
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#else
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#error "Adjust your <asm/byteorder.h> defines"
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#endif
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2006-03-21 03:23:32 +00:00
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__u8 dccph_seq2;
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__be16 dccph_seq;
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2005-08-10 03:14:34 +00:00
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};
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/**
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* struct dccp_hdr_ext - the low bits of a 48 bit seq packet
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*
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* @dccph_seq_low - low 24 bits of a 48 bit seq packet
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*/
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struct dccp_hdr_ext {
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__be32 dccph_seq_low;
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2005-08-10 03:14:34 +00:00
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};
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/**
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2007-09-26 14:27:56 +00:00
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* struct dccp_hdr_request - Connection initiation request header
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2005-08-10 03:14:34 +00:00
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*
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* @dccph_req_service - Service to which the client app wants to connect
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*/
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struct dccp_hdr_request {
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2006-03-21 03:23:32 +00:00
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__be32 dccph_req_service;
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2005-08-10 03:14:34 +00:00
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};
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/**
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* struct dccp_hdr_ack_bits - acknowledgment bits common to most packets
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*
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* @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
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* @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
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*/
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struct dccp_hdr_ack_bits {
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__be16 dccph_reserved1;
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__be16 dccph_ack_nr_high;
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__be32 dccph_ack_nr_low;
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2005-08-10 03:14:34 +00:00
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};
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/**
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2007-09-26 14:27:56 +00:00
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* struct dccp_hdr_response - Connection initiation response header
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2005-08-10 03:14:34 +00:00
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*
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2007-09-26 14:27:56 +00:00
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* @dccph_resp_ack - 48 bit Acknowledgment Number Subheader (5.3)
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2005-08-10 03:14:34 +00:00
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* @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
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*/
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struct dccp_hdr_response {
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struct dccp_hdr_ack_bits dccph_resp_ack;
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2006-03-21 03:23:32 +00:00
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__be32 dccph_resp_service;
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};
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/**
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* struct dccp_hdr_reset - Unconditionally shut down a connection
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*
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2007-09-26 14:27:56 +00:00
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* @dccph_reset_ack - 48 bit Acknowledgment Number Subheader (5.6)
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* @dccph_reset_code - one of %dccp_reset_codes
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* @dccph_reset_data - the Data 1 ... Data 3 fields from 5.6
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2005-08-10 03:14:34 +00:00
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*/
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struct dccp_hdr_reset {
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struct dccp_hdr_ack_bits dccph_reset_ack;
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__u8 dccph_reset_code,
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dccph_reset_data[3];
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};
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enum dccp_pkt_type {
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DCCP_PKT_REQUEST = 0,
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DCCP_PKT_RESPONSE,
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DCCP_PKT_DATA,
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DCCP_PKT_ACK,
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DCCP_PKT_DATAACK,
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DCCP_PKT_CLOSEREQ,
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DCCP_PKT_CLOSE,
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DCCP_PKT_RESET,
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DCCP_PKT_SYNC,
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DCCP_PKT_SYNCACK,
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DCCP_PKT_INVALID,
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};
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#define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID
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static inline unsigned int dccp_packet_hdr_len(const __u8 type)
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{
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if (type == DCCP_PKT_DATA)
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return 0;
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if (type == DCCP_PKT_DATAACK ||
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type == DCCP_PKT_ACK ||
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type == DCCP_PKT_SYNC ||
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type == DCCP_PKT_SYNCACK ||
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type == DCCP_PKT_CLOSE ||
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type == DCCP_PKT_CLOSEREQ)
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return sizeof(struct dccp_hdr_ack_bits);
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if (type == DCCP_PKT_REQUEST)
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return sizeof(struct dccp_hdr_request);
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if (type == DCCP_PKT_RESPONSE)
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return sizeof(struct dccp_hdr_response);
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return sizeof(struct dccp_hdr_reset);
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}
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enum dccp_reset_codes {
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DCCP_RESET_CODE_UNSPECIFIED = 0,
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DCCP_RESET_CODE_CLOSED,
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DCCP_RESET_CODE_ABORTED,
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DCCP_RESET_CODE_NO_CONNECTION,
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DCCP_RESET_CODE_PACKET_ERROR,
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DCCP_RESET_CODE_OPTION_ERROR,
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DCCP_RESET_CODE_MANDATORY_ERROR,
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DCCP_RESET_CODE_CONNECTION_REFUSED,
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DCCP_RESET_CODE_BAD_SERVICE_CODE,
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DCCP_RESET_CODE_TOO_BUSY,
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DCCP_RESET_CODE_BAD_INIT_COOKIE,
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DCCP_RESET_CODE_AGGRESSION_PENALTY,
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};
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/* DCCP options */
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enum {
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DCCPO_PADDING = 0,
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DCCPO_MANDATORY = 1,
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DCCPO_MIN_RESERVED = 3,
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DCCPO_MAX_RESERVED = 31,
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[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 01:43:56 +00:00
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DCCPO_CHANGE_L = 32,
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DCCPO_CONFIRM_L = 33,
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DCCPO_CHANGE_R = 34,
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DCCPO_CONFIRM_R = 35,
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2005-08-10 03:14:34 +00:00
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DCCPO_NDP_COUNT = 37,
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DCCPO_ACK_VECTOR_0 = 38,
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DCCPO_ACK_VECTOR_1 = 39,
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DCCPO_TIMESTAMP = 41,
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DCCPO_TIMESTAMP_ECHO = 42,
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DCCPO_ELAPSED_TIME = 43,
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DCCPO_MAX = 45,
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DCCPO_MIN_CCID_SPECIFIC = 128,
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DCCPO_MAX_CCID_SPECIFIC = 255,
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};
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2006-09-22 02:25:36 +00:00
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/* DCCP CCIDS */
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enum {
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DCCPC_CCID2 = 2,
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DCCPC_CCID3 = 3,
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};
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[DCCP]: Make feature negotiation more readable
This patch replaces cryptic feature negotiation messages of type
Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5
into ones of type:
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2)
Also,
* completed the feature number list wrt RFC 4340 sec. 6.4
* annotating which ones have been implemented so far
* implemented rudimentary sanity checking in feat.c (FIXMEs)
* some minor fixes
Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for
consistency with dccp_{state,packet}_name, that, BTW,
should be compiled only if CONFIG_IP_DCCP_DEBUG is
selected, leaving this to another cset tho. Also
shortened dccp_feat_negotiation_debug to dccp_feat_debug.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2006-11-14 14:48:10 +00:00
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/* DCCP features (RFC 4340 section 6.4) */
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2006-12-10 18:01:18 +00:00
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enum {
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DCCPF_RESERVED = 0,
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DCCPF_CCID = 1,
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[DCCP]: Make feature negotiation more readable
This patch replaces cryptic feature negotiation messages of type
Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5
into ones of type:
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2)
Also,
* completed the feature number list wrt RFC 4340 sec. 6.4
* annotating which ones have been implemented so far
* implemented rudimentary sanity checking in feat.c (FIXMEs)
* some minor fixes
Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for
consistency with dccp_{state,packet}_name, that, BTW,
should be compiled only if CONFIG_IP_DCCP_DEBUG is
selected, leaving this to another cset tho. Also
shortened dccp_feat_negotiation_debug to dccp_feat_debug.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2006-11-14 14:48:10 +00:00
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DCCPF_SHORT_SEQNOS = 2, /* XXX: not yet implemented */
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2006-12-10 18:01:18 +00:00
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DCCPF_SEQUENCE_WINDOW = 3,
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[DCCP]: Make feature negotiation more readable
This patch replaces cryptic feature negotiation messages of type
Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5
into ones of type:
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2)
Also,
* completed the feature number list wrt RFC 4340 sec. 6.4
* annotating which ones have been implemented so far
* implemented rudimentary sanity checking in feat.c (FIXMEs)
* some minor fixes
Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for
consistency with dccp_{state,packet}_name, that, BTW,
should be compiled only if CONFIG_IP_DCCP_DEBUG is
selected, leaving this to another cset tho. Also
shortened dccp_feat_negotiation_debug to dccp_feat_debug.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2006-11-14 14:48:10 +00:00
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DCCPF_ECN_INCAPABLE = 4, /* XXX: not yet implemented */
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2006-12-10 18:01:18 +00:00
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DCCPF_ACK_RATIO = 5,
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DCCPF_SEND_ACK_VECTOR = 6,
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DCCPF_SEND_NDP_COUNT = 7,
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2006-11-10 19:43:06 +00:00
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DCCPF_MIN_CSUM_COVER = 8,
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[DCCP]: Make feature negotiation more readable
This patch replaces cryptic feature negotiation messages of type
Oct 31 15:42:20 kernel: dccp_feat_change: feat change type=32 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=34 feat=1
Oct 31 15:42:21 kernel: dccp_feat_change: feat change type=32 feat=5
into ones of type:
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeR(CCID (1), 3)
Nov 2 13:54:45 kernel: dccp_feat_change: ChangeL(Ack Ratio (5), 2)
Also,
* completed the feature number list wrt RFC 4340 sec. 6.4
* annotating which ones have been implemented so far
* implemented rudimentary sanity checking in feat.c (FIXMEs)
* some minor fixes
Commiter note: uninlined dccp_feat_name and dccp_feat_typename, for
consistency with dccp_{state,packet}_name, that, BTW,
should be compiled only if CONFIG_IP_DCCP_DEBUG is
selected, leaving this to another cset tho. Also
shortened dccp_feat_negotiation_debug to dccp_feat_debug.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
2006-11-14 14:48:10 +00:00
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DCCPF_DATA_CHECKSUM = 9, /* XXX: not yet implemented */
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2006-12-10 18:01:18 +00:00
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/* 10-127 reserved */
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DCCPF_MIN_CCID_SPECIFIC = 128,
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DCCPF_MAX_CCID_SPECIFIC = 255,
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2005-08-10 03:14:34 +00:00
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};
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[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 01:43:56 +00:00
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/* this structure is argument to DCCP_SOCKOPT_CHANGE_X */
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struct dccp_so_feat {
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__u8 dccpsf_feat;
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2006-10-10 21:44:37 +00:00
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__u8 __user *dccpsf_val;
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[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 01:43:56 +00:00
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__u8 dccpsf_len;
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};
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2005-08-28 07:51:32 +00:00
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/* DCCP socket options */
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2006-11-28 21:33:36 +00:00
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#define DCCP_SOCKOPT_PACKET_SIZE 1 /* XXX deprecated, without effect */
|
2005-09-16 23:58:40 +00:00
|
|
|
#define DCCP_SOCKOPT_SERVICE 2
|
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 01:43:56 +00:00
|
|
|
#define DCCP_SOCKOPT_CHANGE_L 3
|
|
|
|
#define DCCP_SOCKOPT_CHANGE_R 4
|
2007-10-04 21:39:22 +00:00
|
|
|
#define DCCP_SOCKOPT_GET_CUR_MPS 5
|
2006-11-10 19:43:06 +00:00
|
|
|
#define DCCP_SOCKOPT_SEND_CSCOV 10
|
|
|
|
#define DCCP_SOCKOPT_RECV_CSCOV 11
|
2005-09-18 07:19:32 +00:00
|
|
|
#define DCCP_SOCKOPT_CCID_RX_INFO 128
|
|
|
|
#define DCCP_SOCKOPT_CCID_TX_INFO 192
|
2005-09-16 23:58:40 +00:00
|
|
|
|
2006-11-14 14:57:34 +00:00
|
|
|
/* maximum number of services provided on the same listening port */
|
2005-09-16 23:58:40 +00:00
|
|
|
#define DCCP_SERVICE_LIST_MAX_LEN 32
|
2005-08-28 07:51:32 +00:00
|
|
|
|
2005-08-10 03:26:03 +00:00
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
|
|
|
#include <linux/in.h>
|
2007-08-20 00:18:33 +00:00
|
|
|
#include <linux/ktime.h>
|
2005-08-10 03:26:03 +00:00
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/uio.h>
|
|
|
|
#include <linux/workqueue.h>
|
|
|
|
|
|
|
|
#include <net/inet_connection_sock.h>
|
2005-12-27 04:43:12 +00:00
|
|
|
#include <net/inet_sock.h>
|
2005-08-10 03:45:21 +00:00
|
|
|
#include <net/inet_timewait_sock.h>
|
2005-08-10 03:26:03 +00:00
|
|
|
#include <net/tcp_states.h>
|
|
|
|
|
|
|
|
enum dccp_state {
|
|
|
|
DCCP_OPEN = TCP_ESTABLISHED,
|
|
|
|
DCCP_REQUESTING = TCP_SYN_SENT,
|
|
|
|
DCCP_PARTOPEN = TCP_FIN_WAIT1, /* FIXME:
|
|
|
|
This mapping is horrible, but TCP has
|
|
|
|
no matching state for DCCP_PARTOPEN,
|
|
|
|
as TCP_SYN_RECV is already used by
|
|
|
|
DCCP_RESPOND, why don't stop using TCP
|
|
|
|
mapping of states? OK, now we don't use
|
|
|
|
sk_stream_sendmsg anymore, so doesn't
|
|
|
|
seem to exist any reason for us to
|
|
|
|
do the TCP mapping here */
|
|
|
|
DCCP_LISTEN = TCP_LISTEN,
|
|
|
|
DCCP_RESPOND = TCP_SYN_RECV,
|
|
|
|
DCCP_CLOSING = TCP_CLOSING,
|
|
|
|
DCCP_TIME_WAIT = TCP_TIME_WAIT,
|
|
|
|
DCCP_CLOSED = TCP_CLOSE,
|
|
|
|
DCCP_MAX_STATES = TCP_MAX_STATES,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define DCCP_STATE_MASK 0xf
|
|
|
|
#define DCCP_ACTION_FIN (1<<7)
|
|
|
|
|
|
|
|
enum {
|
|
|
|
DCCPF_OPEN = TCPF_ESTABLISHED,
|
|
|
|
DCCPF_REQUESTING = TCPF_SYN_SENT,
|
|
|
|
DCCPF_PARTOPEN = TCPF_FIN_WAIT1,
|
|
|
|
DCCPF_LISTEN = TCPF_LISTEN,
|
|
|
|
DCCPF_RESPOND = TCPF_SYN_RECV,
|
|
|
|
DCCPF_CLOSING = TCPF_CLOSING,
|
|
|
|
DCCPF_TIME_WAIT = TCPF_TIME_WAIT,
|
|
|
|
DCCPF_CLOSED = TCPF_CLOSE,
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb)
|
|
|
|
{
|
2007-04-26 01:04:18 +00:00
|
|
|
return (struct dccp_hdr *)skb_transport_header(skb);
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
2006-11-10 13:22:32 +00:00
|
|
|
static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen)
|
|
|
|
{
|
2007-03-13 16:06:52 +00:00
|
|
|
skb_push(skb, headlen);
|
|
|
|
skb_reset_transport_header(skb);
|
2007-04-26 01:04:18 +00:00
|
|
|
return memset(skb_transport_header(skb), 0, headlen);
|
2006-11-10 13:22:32 +00:00
|
|
|
}
|
|
|
|
|
2007-10-24 12:12:09 +00:00
|
|
|
static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh)
|
2005-08-10 03:26:03 +00:00
|
|
|
{
|
2007-10-24 12:12:09 +00:00
|
|
|
return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh));
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
2005-08-10 03:26:55 +00:00
|
|
|
static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh)
|
|
|
|
{
|
|
|
|
return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0);
|
|
|
|
}
|
|
|
|
|
2005-08-10 03:26:03 +00:00
|
|
|
static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
const struct dccp_hdr *dh = dccp_hdr(skb);
|
2005-08-10 03:26:55 +00:00
|
|
|
return __dccp_basic_hdr_len(dh);
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
2007-10-24 12:12:09 +00:00
|
|
|
static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh)
|
2005-08-10 03:26:03 +00:00
|
|
|
{
|
2006-03-21 03:23:32 +00:00
|
|
|
__u64 seq_nr = ntohs(dh->dccph_seq);
|
2005-08-10 03:26:03 +00:00
|
|
|
|
|
|
|
if (dh->dccph_x != 0)
|
2007-10-24 12:12:09 +00:00
|
|
|
seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(dh)->dccph_seq_low);
|
2006-03-21 03:23:32 +00:00
|
|
|
else
|
|
|
|
seq_nr += (u32)dh->dccph_seq2 << 16;
|
2005-08-10 03:26:03 +00:00
|
|
|
|
|
|
|
return seq_nr;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb)
|
|
|
|
{
|
2007-04-26 01:04:18 +00:00
|
|
|
return (struct dccp_hdr_request *)(skb_transport_header(skb) +
|
|
|
|
dccp_basic_hdr_len(skb));
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb)
|
|
|
|
{
|
2007-04-26 01:04:18 +00:00
|
|
|
return (struct dccp_hdr_ack_bits *)(skb_transport_header(skb) +
|
|
|
|
dccp_basic_hdr_len(skb));
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
const struct dccp_hdr_ack_bits *dhack = dccp_hdr_ack_bits(skb);
|
2006-03-21 03:23:32 +00:00
|
|
|
return ((u64)ntohs(dhack->dccph_ack_nr_high) << 32) + ntohl(dhack->dccph_ack_nr_low);
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb)
|
|
|
|
{
|
2007-04-26 01:04:18 +00:00
|
|
|
return (struct dccp_hdr_response *)(skb_transport_header(skb) +
|
|
|
|
dccp_basic_hdr_len(skb));
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb)
|
|
|
|
{
|
2007-04-26 01:04:18 +00:00
|
|
|
return (struct dccp_hdr_reset *)(skb_transport_header(skb) +
|
|
|
|
dccp_basic_hdr_len(skb));
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
2005-08-10 03:26:55 +00:00
|
|
|
static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh)
|
|
|
|
{
|
|
|
|
return __dccp_basic_hdr_len(dh) +
|
|
|
|
dccp_packet_hdr_len(dh->dccph_type);
|
|
|
|
}
|
|
|
|
|
2005-08-10 03:26:03 +00:00
|
|
|
static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
|
|
|
|
{
|
2005-08-10 03:26:55 +00:00
|
|
|
return __dccp_hdr_len(dccp_hdr(skb));
|
2005-08-10 03:26:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
/* initial values for each feature */
|
|
|
|
#define DCCPF_INITIAL_SEQUENCE_WINDOW 100
|
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 01:43:56 +00:00
|
|
|
#define DCCPF_INITIAL_ACK_RATIO 2
|
2006-09-22 02:25:36 +00:00
|
|
|
#define DCCPF_INITIAL_CCID DCCPC_CCID2
|
2006-03-21 01:41:47 +00:00
|
|
|
#define DCCPF_INITIAL_SEND_ACK_VECTOR 1
|
2005-08-10 03:14:34 +00:00
|
|
|
/* FIXME: for now we're default to 1 but it should really be 0 */
|
|
|
|
#define DCCPF_INITIAL_SEND_NDP_COUNT 1
|
|
|
|
|
|
|
|
#define DCCP_NDP_LIMIT 0xFFFFFF
|
|
|
|
|
|
|
|
/**
|
2006-03-21 06:50:58 +00:00
|
|
|
* struct dccp_minisock - Minimal DCCP connection representation
|
|
|
|
*
|
|
|
|
* Will be used to pass the state from dccp_request_sock to dccp_sock.
|
|
|
|
*
|
|
|
|
* @dccpms_sequence_window - Sequence Window Feature (section 7.5.2)
|
|
|
|
* @dccpms_ccid - Congestion Control Id (CCID) (section 10)
|
|
|
|
* @dccpms_send_ack_vector - Send Ack Vector Feature (section 11.5)
|
|
|
|
* @dccpms_send_ndp_count - Send NDP Count Feature (7.7.2)
|
2006-11-14 14:57:34 +00:00
|
|
|
* @dccpms_ack_ratio - Ack Ratio Feature (section 11.3)
|
|
|
|
* @dccpms_pending - List of features being negotiated
|
|
|
|
* @dccpms_conf -
|
2005-08-10 03:14:34 +00:00
|
|
|
*/
|
2006-03-21 06:50:58 +00:00
|
|
|
struct dccp_minisock {
|
|
|
|
__u64 dccpms_sequence_window;
|
|
|
|
__u8 dccpms_rx_ccid;
|
|
|
|
__u8 dccpms_tx_ccid;
|
|
|
|
__u8 dccpms_send_ack_vector;
|
|
|
|
__u8 dccpms_send_ndp_count;
|
|
|
|
__u8 dccpms_ack_ratio;
|
|
|
|
struct list_head dccpms_pending;
|
|
|
|
struct list_head dccpms_conf;
|
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-21 01:43:56 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
struct dccp_opt_conf {
|
|
|
|
__u8 *dccpoc_val;
|
|
|
|
__u8 dccpoc_len;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct dccp_opt_pend {
|
|
|
|
struct list_head dccpop_node;
|
|
|
|
__u8 dccpop_type;
|
|
|
|
__u8 dccpop_feat;
|
|
|
|
__u8 *dccpop_val;
|
|
|
|
__u8 dccpop_len;
|
|
|
|
int dccpop_conf;
|
|
|
|
struct dccp_opt_conf *dccpop_sc;
|
2005-08-10 03:14:34 +00:00
|
|
|
};
|
|
|
|
|
2006-03-21 06:50:58 +00:00
|
|
|
extern void dccp_minisock_init(struct dccp_minisock *dmsk);
|
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
extern int dccp_parse_options(struct sock *sk, struct sk_buff *skb);
|
|
|
|
|
|
|
|
struct dccp_request_sock {
|
|
|
|
struct inet_request_sock dreq_inet_rsk;
|
|
|
|
__u64 dreq_iss;
|
|
|
|
__u64 dreq_isr;
|
2006-03-21 03:23:32 +00:00
|
|
|
__be32 dreq_service;
|
2005-08-10 03:14:34 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req)
|
|
|
|
{
|
|
|
|
return (struct dccp_request_sock *)req;
|
|
|
|
}
|
|
|
|
|
2005-08-10 03:45:21 +00:00
|
|
|
extern struct inet_timewait_death_row dccp_death_row;
|
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
struct dccp_options_received {
|
2005-09-18 07:17:51 +00:00
|
|
|
u32 dccpor_ndp; /* only 24 bits */
|
2005-08-10 03:14:34 +00:00
|
|
|
u32 dccpor_timestamp;
|
|
|
|
u32 dccpor_timestamp_echo;
|
|
|
|
u32 dccpor_elapsed_time;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct ccid;
|
|
|
|
|
|
|
|
enum dccp_role {
|
|
|
|
DCCP_ROLE_UNDEFINED,
|
|
|
|
DCCP_ROLE_LISTEN,
|
|
|
|
DCCP_ROLE_CLIENT,
|
|
|
|
DCCP_ROLE_SERVER,
|
|
|
|
};
|
|
|
|
|
2005-09-16 23:58:40 +00:00
|
|
|
struct dccp_service_list {
|
|
|
|
__u32 dccpsl_nr;
|
2006-03-21 03:23:32 +00:00
|
|
|
__be32 dccpsl_list[0];
|
2005-09-16 23:58:40 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
#define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1)
|
2006-12-10 18:01:18 +00:00
|
|
|
#define DCCP_SERVICE_CODE_IS_ABSENT 0
|
2005-09-16 23:58:40 +00:00
|
|
|
|
|
|
|
static inline int dccp_list_has_service(const struct dccp_service_list *sl,
|
2006-03-21 03:23:32 +00:00
|
|
|
const __be32 service)
|
2005-09-16 23:58:40 +00:00
|
|
|
{
|
|
|
|
if (likely(sl != NULL)) {
|
|
|
|
u32 i = sl->dccpsl_nr;
|
|
|
|
while (i--)
|
|
|
|
if (sl->dccpsl_list[i] == service)
|
2006-12-10 18:01:18 +00:00
|
|
|
return 1;
|
2005-09-16 23:58:40 +00:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-09-18 07:17:51 +00:00
|
|
|
struct dccp_ackvec;
|
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
/**
|
|
|
|
* struct dccp_sock - DCCP socket state
|
|
|
|
*
|
|
|
|
* @dccps_swl - sequence number window low
|
|
|
|
* @dccps_swh - sequence number window high
|
|
|
|
* @dccps_awl - acknowledgement number window low
|
|
|
|
* @dccps_awh - acknowledgement number window high
|
|
|
|
* @dccps_iss - initial sequence number sent
|
|
|
|
* @dccps_isr - initial sequence number received
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|
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* @dccps_osr - first OPEN sequence number received
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* @dccps_gss - greatest sequence number sent
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|
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* @dccps_gsr - greatest valid sequence number received
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|
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* @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss
|
2006-11-14 14:57:34 +00:00
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|
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* @dccps_service - first (passive sock) or unique (active sock) service code
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|
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* @dccps_service_list - second .. last service code on passive socket
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2005-08-10 03:14:34 +00:00
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|
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* @dccps_timestamp_time - time of latest TIMESTAMP option
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|
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* @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option
|
2007-04-20 20:57:21 +00:00
|
|
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* @dccps_l_ack_ratio - feature-local Ack Ratio
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* @dccps_r_ack_ratio - feature-remote Ack Ratio
|
2006-11-10 19:43:06 +00:00
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|
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* @dccps_pcslen - sender partial checksum coverage (via sockopt)
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* @dccps_pcrlen - receiver partial checksum coverage (via sockopt)
|
2005-08-10 03:14:34 +00:00
|
|
|
* @dccps_ndp_count - number of Non Data Packets since last data packet
|
2007-04-20 20:57:21 +00:00
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|
|
* @dccps_mss_cache - current value of MSS (path MTU minus header sizes)
|
2007-09-26 14:31:49 +00:00
|
|
|
* @dccps_rate_last - timestamp for rate-limiting DCCP-Sync (RFC 4340, 7.5.4)
|
2007-04-20 20:57:21 +00:00
|
|
|
* @dccps_minisock - associated minisock (accessed via dccp_msk)
|
2005-09-18 07:17:51 +00:00
|
|
|
* @dccps_hc_rx_ackvec - rx half connection ack vector
|
2007-04-20 20:57:21 +00:00
|
|
|
* @dccps_hc_rx_ccid - CCID used for the receiver (or receiving half-connection)
|
|
|
|
* @dccps_hc_tx_ccid - CCID used for the sender (or sending half-connection)
|
|
|
|
* @dccps_options_received - parsed set of retrieved options
|
|
|
|
* @dccps_role - role of this sock, one of %dccp_role
|
|
|
|
* @dccps_hc_rx_insert_options - receiver wants to add options when acking
|
|
|
|
* @dccps_hc_tx_insert_options - sender wants to add options when sending
|
2006-08-27 02:16:45 +00:00
|
|
|
* @dccps_xmit_timer - timer for when CCID is not ready to send
|
2007-03-20 18:27:17 +00:00
|
|
|
* @dccps_syn_rtt - RTT sample from Request/Response exchange (in usecs)
|
2005-08-10 03:14:34 +00:00
|
|
|
*/
|
|
|
|
struct dccp_sock {
|
|
|
|
/* inet_connection_sock has to be the first member of dccp_sock */
|
|
|
|
struct inet_connection_sock dccps_inet_connection;
|
2007-03-20 18:27:17 +00:00
|
|
|
#define dccps_syn_rtt dccps_inet_connection.icsk_ack.lrcvtime
|
2005-08-10 03:14:34 +00:00
|
|
|
__u64 dccps_swl;
|
|
|
|
__u64 dccps_swh;
|
|
|
|
__u64 dccps_awl;
|
|
|
|
__u64 dccps_awh;
|
|
|
|
__u64 dccps_iss;
|
|
|
|
__u64 dccps_isr;
|
|
|
|
__u64 dccps_osr;
|
|
|
|
__u64 dccps_gss;
|
|
|
|
__u64 dccps_gsr;
|
|
|
|
__u64 dccps_gar;
|
2006-03-21 03:23:32 +00:00
|
|
|
__be32 dccps_service;
|
2005-09-16 23:58:40 +00:00
|
|
|
struct dccp_service_list *dccps_service_list;
|
2007-08-20 00:18:33 +00:00
|
|
|
ktime_t dccps_timestamp_time;
|
2005-08-10 03:14:34 +00:00
|
|
|
__u32 dccps_timestamp_echo;
|
2006-03-21 01:41:47 +00:00
|
|
|
__u16 dccps_l_ack_ratio;
|
|
|
|
__u16 dccps_r_ack_ratio;
|
2006-11-10 19:43:06 +00:00
|
|
|
__u16 dccps_pcslen;
|
|
|
|
__u16 dccps_pcrlen;
|
2005-08-10 03:14:34 +00:00
|
|
|
unsigned long dccps_ndp_count;
|
|
|
|
__u32 dccps_mss_cache;
|
2007-09-26 14:31:49 +00:00
|
|
|
unsigned long dccps_rate_last;
|
2006-03-21 06:50:58 +00:00
|
|
|
struct dccp_minisock dccps_minisock;
|
2005-09-18 07:17:51 +00:00
|
|
|
struct dccp_ackvec *dccps_hc_rx_ackvec;
|
2005-08-10 03:14:34 +00:00
|
|
|
struct ccid *dccps_hc_rx_ccid;
|
|
|
|
struct ccid *dccps_hc_tx_ccid;
|
|
|
|
struct dccp_options_received dccps_options_received;
|
|
|
|
enum dccp_role dccps_role:2;
|
2005-09-09 05:30:07 +00:00
|
|
|
__u8 dccps_hc_rx_insert_options:1;
|
|
|
|
__u8 dccps_hc_tx_insert_options:1;
|
2006-08-27 02:16:45 +00:00
|
|
|
struct timer_list dccps_xmit_timer;
|
2005-08-10 03:14:34 +00:00
|
|
|
};
|
2006-12-10 18:01:18 +00:00
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
static inline struct dccp_sock *dccp_sk(const struct sock *sk)
|
|
|
|
{
|
|
|
|
return (struct dccp_sock *)sk;
|
|
|
|
}
|
|
|
|
|
2006-03-21 06:50:58 +00:00
|
|
|
static inline struct dccp_minisock *dccp_msk(const struct sock *sk)
|
|
|
|
{
|
|
|
|
return (struct dccp_minisock *)&dccp_sk(sk)->dccps_minisock;
|
|
|
|
}
|
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
static inline const char *dccp_role(const struct sock *sk)
|
|
|
|
{
|
|
|
|
switch (dccp_sk(sk)->dccps_role) {
|
|
|
|
case DCCP_ROLE_UNDEFINED: return "undefined";
|
|
|
|
case DCCP_ROLE_LISTEN: return "listen";
|
|
|
|
case DCCP_ROLE_SERVER: return "server";
|
|
|
|
case DCCP_ROLE_CLIENT: return "client";
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2005-08-10 03:26:03 +00:00
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
|
2005-08-10 03:14:34 +00:00
|
|
|
#endif /* _LINUX_DCCP_H */
|