| /* |
| * net/tipc/msg.h: Include file for TIPC message header routines |
| * |
| * Copyright (c) 2000-2007, 2014-2017 Ericsson AB |
| * Copyright (c) 2005-2008, 2010-2011, Wind River Systems |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the names of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef _TIPC_MSG_H |
| #define _TIPC_MSG_H |
| |
| #include <linux/tipc.h> |
| #include "core.h" |
| |
| /* |
| * Constants and routines used to read and write TIPC payload message headers |
| * |
| * Note: Some items are also used with TIPC internal message headers |
| */ |
| #define TIPC_VERSION 2 |
| struct plist; |
| |
| /* |
| * Payload message users are defined in TIPC's public API: |
| * - TIPC_LOW_IMPORTANCE |
| * - TIPC_MEDIUM_IMPORTANCE |
| * - TIPC_HIGH_IMPORTANCE |
| * - TIPC_CRITICAL_IMPORTANCE |
| */ |
| #define TIPC_SYSTEM_IMPORTANCE 4 |
| |
| |
| /* |
| * Payload message types |
| */ |
| #define TIPC_CONN_MSG 0 |
| #define TIPC_MCAST_MSG 1 |
| #define TIPC_NAMED_MSG 2 |
| #define TIPC_DIRECT_MSG 3 |
| #define TIPC_GRP_MEMBER_EVT 4 |
| #define TIPC_GRP_BCAST_MSG 5 |
| #define TIPC_GRP_MCAST_MSG 6 |
| #define TIPC_GRP_UCAST_MSG 7 |
| |
| /* |
| * Internal message users |
| */ |
| #define BCAST_PROTOCOL 5 |
| #define MSG_BUNDLER 6 |
| #define LINK_PROTOCOL 7 |
| #define CONN_MANAGER 8 |
| #define GROUP_PROTOCOL 9 |
| #define TUNNEL_PROTOCOL 10 |
| #define NAME_DISTRIBUTOR 11 |
| #define MSG_FRAGMENTER 12 |
| #define LINK_CONFIG 13 |
| #define SOCK_WAKEUP 14 /* pseudo user */ |
| #define TOP_SRV 15 /* pseudo user */ |
| |
| /* |
| * Message header sizes |
| */ |
| #define SHORT_H_SIZE 24 /* In-cluster basic payload message */ |
| #define BASIC_H_SIZE 32 /* Basic payload message */ |
| #define NAMED_H_SIZE 40 /* Named payload message */ |
| #define MCAST_H_SIZE 44 /* Multicast payload message */ |
| #define GROUP_H_SIZE 44 /* Group payload message */ |
| #define INT_H_SIZE 40 /* Internal messages */ |
| #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ |
| #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ |
| |
| #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
| #define FB_MTU 3744 |
| #define TIPC_MEDIA_INFO_OFFSET 5 |
| |
| struct tipc_skb_cb { |
| union { |
| struct { |
| struct sk_buff *tail; |
| unsigned long nxt_retr; |
| unsigned long retr_stamp; |
| u32 bytes_read; |
| u32 orig_member; |
| u16 chain_imp; |
| u16 ackers; |
| u16 retr_cnt; |
| } __packed; |
| #ifdef CONFIG_TIPC_CRYPTO |
| struct { |
| struct tipc_crypto *rx; |
| struct tipc_aead *last; |
| u8 recurs; |
| } tx_clone_ctx __packed; |
| #endif |
| } __packed; |
| union { |
| struct { |
| u8 validated:1; |
| #ifdef CONFIG_TIPC_CRYPTO |
| u8 encrypted:1; |
| u8 decrypted:1; |
| u8 probe:1; |
| u8 tx_clone_deferred:1; |
| #endif |
| }; |
| u8 flags; |
| }; |
| u8 reserved; |
| #ifdef CONFIG_TIPC_CRYPTO |
| void *crypto_ctx; |
| #endif |
| } __packed; |
| |
| #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) |
| |
| struct tipc_msg { |
| __be32 hdr[15]; |
| }; |
| |
| /* struct tipc_gap_ack - TIPC Gap ACK block |
| * @ack: seqno of the last consecutive packet in link deferdq |
| * @gap: number of gap packets since the last ack |
| * |
| * E.g: |
| * link deferdq: 1 2 3 4 10 11 13 14 15 20 |
| * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0> |
| */ |
| struct tipc_gap_ack { |
| __be16 ack; |
| __be16 gap; |
| }; |
| |
| /* struct tipc_gap_ack_blks |
| * @len: actual length of the record |
| * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast |
| * ones) |
| * @start_index: starting index for "valid" broadcast Gap ACK blocks |
| * @bgack_cnt: number of Gap ACK blocks for broadcast in the record |
| * @gacks: array of Gap ACK blocks |
| * |
| * 31 16 15 0 |
| * +-------------+-------------+-------------+-------------+ |
| * | bgack_cnt | ugack_cnt | len | |
| * +-------------+-------------+-------------+-------------+ - |
| * | gap | ack | | |
| * +-------------+-------------+-------------+-------------+ > bc gacks |
| * : : : | |
| * +-------------+-------------+-------------+-------------+ - |
| * | gap | ack | | |
| * +-------------+-------------+-------------+-------------+ > uc gacks |
| * : : : | |
| * +-------------+-------------+-------------+-------------+ - |
| */ |
| struct tipc_gap_ack_blks { |
| __be16 len; |
| union { |
| u8 ugack_cnt; |
| u8 start_index; |
| }; |
| u8 bgack_cnt; |
| struct tipc_gap_ack gacks[]; |
| }; |
| |
| #define MAX_GAP_ACK_BLKS 128 |
| #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \ |
| sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS) |
| |
| static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
| { |
| return (struct tipc_msg *)skb->data; |
| } |
| |
| static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
| { |
| return ntohl(m->hdr[pos]); |
| } |
| |
| static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) |
| { |
| m->hdr[w] = htonl(val); |
| } |
| |
| static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
| { |
| return (msg_word(m, w) >> pos) & mask; |
| } |
| |
| static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
| u32 pos, u32 mask, u32 val) |
| { |
| val = (val & mask) << pos; |
| mask = mask << pos; |
| m->hdr[w] &= ~htonl(mask); |
| m->hdr[w] |= htonl(val); |
| } |
| |
| static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
| { |
| u32 temp = msg->hdr[a]; |
| |
| msg->hdr[a] = msg->hdr[b]; |
| msg->hdr[b] = temp; |
| } |
| |
| /* |
| * Word 0 |
| */ |
| static inline u32 msg_version(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 29, 7); |
| } |
| |
| static inline void msg_set_version(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
| } |
| |
| static inline u32 msg_user(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 25, 0xf); |
| } |
| |
| static inline u32 msg_isdata(struct tipc_msg *m) |
| { |
| return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
| } |
| |
| static inline void msg_set_user(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 0, 25, 0xf, n); |
| } |
| |
| static inline u32 msg_hdr_sz(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 21, 0xf) << 2; |
| } |
| |
| static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 0, 21, 0xf, n>>2); |
| } |
| |
| static inline u32 msg_size(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 0, 0x1ffff); |
| } |
| |
| static inline u32 msg_blocks(struct tipc_msg *m) |
| { |
| return (msg_size(m) / 1024) + 1; |
| } |
| |
| static inline u32 msg_data_sz(struct tipc_msg *m) |
| { |
| return msg_size(m) - msg_hdr_sz(m); |
| } |
| |
| static inline int msg_non_seq(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 20, 1); |
| } |
| |
| static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 0, 20, 1, n); |
| } |
| |
| static inline int msg_is_syn(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 17, 1); |
| } |
| |
| static inline void msg_set_syn(struct tipc_msg *m, u32 d) |
| { |
| msg_set_bits(m, 0, 17, 1, d); |
| } |
| |
| static inline int msg_dest_droppable(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 19, 1); |
| } |
| |
| static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
| { |
| msg_set_bits(m, 0, 19, 1, d); |
| } |
| |
| static inline int msg_is_keepalive(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 19, 1); |
| } |
| |
| static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d) |
| { |
| msg_set_bits(m, 0, 19, 1, d); |
| } |
| |
| static inline int msg_src_droppable(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 18, 1); |
| } |
| |
| static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
| { |
| msg_set_bits(m, 0, 18, 1, d); |
| } |
| |
| static inline int msg_ack_required(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 18, 1); |
| } |
| |
| static inline void msg_set_ack_required(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 0, 18, 1, 1); |
| } |
| |
| static inline int msg_nagle_ack(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 18, 1); |
| } |
| |
| static inline void msg_set_nagle_ack(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 0, 18, 1, 1); |
| } |
| |
| static inline bool msg_is_rcast(struct tipc_msg *m) |
| { |
| return msg_bits(m, 0, 18, 0x1); |
| } |
| |
| static inline void msg_set_is_rcast(struct tipc_msg *m, bool d) |
| { |
| msg_set_bits(m, 0, 18, 0x1, d); |
| } |
| |
| static inline void msg_set_size(struct tipc_msg *m, u32 sz) |
| { |
| m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); |
| } |
| |
| static inline unchar *msg_data(struct tipc_msg *m) |
| { |
| return ((unchar *)m) + msg_hdr_sz(m); |
| } |
| |
| static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m) |
| { |
| return (struct tipc_msg *)msg_data(m); |
| } |
| |
| /* |
| * Word 1 |
| */ |
| static inline u32 msg_type(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 29, 0x7); |
| } |
| |
| static inline void msg_set_type(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 1, 29, 0x7, n); |
| } |
| |
| static inline int msg_in_group(struct tipc_msg *m) |
| { |
| int mtyp = msg_type(m); |
| |
| return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG; |
| } |
| |
| static inline bool msg_is_grp_evt(struct tipc_msg *m) |
| { |
| return msg_type(m) == TIPC_GRP_MEMBER_EVT; |
| } |
| |
| static inline u32 msg_named(struct tipc_msg *m) |
| { |
| return msg_type(m) == TIPC_NAMED_MSG; |
| } |
| |
| static inline u32 msg_mcast(struct tipc_msg *m) |
| { |
| int mtyp = msg_type(m); |
| |
| return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) || |
| (mtyp == TIPC_GRP_MCAST_MSG)); |
| } |
| |
| static inline u32 msg_connected(struct tipc_msg *m) |
| { |
| return msg_type(m) == TIPC_CONN_MSG; |
| } |
| |
| static inline u32 msg_direct(struct tipc_msg *m) |
| { |
| return msg_type(m) == TIPC_DIRECT_MSG; |
| } |
| |
| static inline u32 msg_errcode(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 25, 0xf); |
| } |
| |
| static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
| { |
| msg_set_bits(m, 1, 25, 0xf, err); |
| } |
| |
| static inline void msg_set_bulk(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 1, 28, 0x1, 1); |
| } |
| |
| static inline u32 msg_is_bulk(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 28, 0x1); |
| } |
| |
| static inline void msg_set_last_bulk(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 1, 27, 0x1, 1); |
| } |
| |
| static inline u32 msg_is_last_bulk(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 27, 0x1); |
| } |
| |
| static inline void msg_set_non_legacy(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 1, 26, 0x1, 1); |
| } |
| |
| static inline u32 msg_is_legacy(struct tipc_msg *m) |
| { |
| return !msg_bits(m, 1, 26, 0x1); |
| } |
| |
| static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 21, 0xf); |
| } |
| |
| static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); |
| } |
| |
| static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
| { |
| msg_set_bits(m, 1, 21, 0xf, 0); |
| } |
| |
| static inline u32 msg_lookup_scope(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 19, 0x3); |
| } |
| |
| static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 1, 19, 0x3, n); |
| } |
| |
| static inline u16 msg_bcast_ack(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 0, 0xffff); |
| } |
| |
| static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 1, 0, 0xffff, n); |
| } |
| |
| /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch |
| * link peer session number |
| */ |
| static inline bool msg_dest_session_valid(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 16, 0x1); |
| } |
| |
| static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid) |
| { |
| msg_set_bits(m, 1, 16, 0x1, valid); |
| } |
| |
| static inline u16 msg_dest_session(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 0, 0xffff); |
| } |
| |
| static inline void msg_set_dest_session(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 1, 0, 0xffff, n); |
| } |
| |
| /* |
| * Word 2 |
| */ |
| static inline u16 msg_ack(struct tipc_msg *m) |
| { |
| return msg_bits(m, 2, 16, 0xffff); |
| } |
| |
| static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 2, 16, 0xffff, n); |
| } |
| |
| static inline u16 msg_seqno(struct tipc_msg *m) |
| { |
| return msg_bits(m, 2, 0, 0xffff); |
| } |
| |
| static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 2, 0, 0xffff, n); |
| } |
| |
| /* |
| * Words 3-10 |
| */ |
| static inline u32 msg_importance(struct tipc_msg *m) |
| { |
| int usr = msg_user(m); |
| |
| if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) |
| return usr; |
| if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) |
| return msg_bits(m, 9, 0, 0x7); |
| return TIPC_SYSTEM_IMPORTANCE; |
| } |
| |
| static inline void msg_set_importance(struct tipc_msg *m, u32 i) |
| { |
| int usr = msg_user(m); |
| |
| if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) |
| msg_set_bits(m, 9, 0, 0x7, i); |
| else if (i < TIPC_SYSTEM_IMPORTANCE) |
| msg_set_user(m, i); |
| else |
| pr_warn("Trying to set illegal importance in message\n"); |
| } |
| |
| static inline u32 msg_prevnode(struct tipc_msg *m) |
| { |
| return msg_word(m, 3); |
| } |
| |
| static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
| { |
| msg_set_word(m, 3, a); |
| } |
| |
| static inline u32 msg_origport(struct tipc_msg *m) |
| { |
| if (msg_user(m) == MSG_FRAGMENTER) |
| m = msg_inner_hdr(m); |
| return msg_word(m, 4); |
| } |
| |
| static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
| { |
| msg_set_word(m, 4, p); |
| } |
| |
| static inline u16 msg_named_seqno(struct tipc_msg *m) |
| { |
| return msg_bits(m, 4, 0, 0xffff); |
| } |
| |
| static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 4, 0, 0xffff, n); |
| } |
| |
| static inline u32 msg_destport(struct tipc_msg *m) |
| { |
| return msg_word(m, 5); |
| } |
| |
| static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
| { |
| msg_set_word(m, 5, p); |
| } |
| |
| static inline u32 msg_mc_netid(struct tipc_msg *m) |
| { |
| return msg_word(m, 5); |
| } |
| |
| static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
| { |
| msg_set_word(m, 5, p); |
| } |
| |
| static inline int msg_short(struct tipc_msg *m) |
| { |
| return msg_hdr_sz(m) == SHORT_H_SIZE; |
| } |
| |
| static inline u32 msg_orignode(struct tipc_msg *m) |
| { |
| if (likely(msg_short(m))) |
| return msg_prevnode(m); |
| return msg_word(m, 6); |
| } |
| |
| static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
| { |
| msg_set_word(m, 6, a); |
| } |
| |
| static inline u32 msg_destnode(struct tipc_msg *m) |
| { |
| return msg_word(m, 7); |
| } |
| |
| static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
| { |
| msg_set_word(m, 7, a); |
| } |
| |
| static inline u32 msg_nametype(struct tipc_msg *m) |
| { |
| return msg_word(m, 8); |
| } |
| |
| static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
| { |
| msg_set_word(m, 8, n); |
| } |
| |
| static inline u32 msg_nameinst(struct tipc_msg *m) |
| { |
| return msg_word(m, 9); |
| } |
| |
| static inline u32 msg_namelower(struct tipc_msg *m) |
| { |
| return msg_nameinst(m); |
| } |
| |
| static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
| { |
| msg_set_word(m, 9, n); |
| } |
| |
| static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
| { |
| msg_set_namelower(m, n); |
| } |
| |
| static inline u32 msg_nameupper(struct tipc_msg *m) |
| { |
| return msg_word(m, 10); |
| } |
| |
| static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
| { |
| msg_set_word(m, 10, n); |
| } |
| |
| /* |
| * Constants and routines used to read and write TIPC internal message headers |
| */ |
| |
| /* |
| * Connection management protocol message types |
| */ |
| #define CONN_PROBE 0 |
| #define CONN_PROBE_REPLY 1 |
| #define CONN_ACK 2 |
| |
| /* |
| * Name distributor message types |
| */ |
| #define PUBLICATION 0 |
| #define WITHDRAWAL 1 |
| |
| /* |
| * Segmentation message types |
| */ |
| #define FIRST_FRAGMENT 0 |
| #define FRAGMENT 1 |
| #define LAST_FRAGMENT 2 |
| |
| /* |
| * Link management protocol message types |
| */ |
| #define STATE_MSG 0 |
| #define RESET_MSG 1 |
| #define ACTIVATE_MSG 2 |
| |
| /* |
| * Changeover tunnel message types |
| */ |
| #define SYNCH_MSG 0 |
| #define FAILOVER_MSG 1 |
| |
| /* |
| * Config protocol message types |
| */ |
| #define DSC_REQ_MSG 0 |
| #define DSC_RESP_MSG 1 |
| #define DSC_TRIAL_MSG 2 |
| #define DSC_TRIAL_FAIL_MSG 3 |
| |
| /* |
| * Group protocol message types |
| */ |
| #define GRP_JOIN_MSG 0 |
| #define GRP_LEAVE_MSG 1 |
| #define GRP_ADV_MSG 2 |
| #define GRP_ACK_MSG 3 |
| #define GRP_RECLAIM_MSG 4 |
| #define GRP_REMIT_MSG 5 |
| |
| /* |
| * Word 1 |
| */ |
| static inline u32 msg_seq_gap(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 16, 0x1fff); |
| } |
| |
| static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 1, 16, 0x1fff, n); |
| } |
| |
| static inline u32 msg_node_sig(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 0, 0xffff); |
| } |
| |
| static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 1, 0, 0xffff, n); |
| } |
| |
| static inline u32 msg_node_capabilities(struct tipc_msg *m) |
| { |
| return msg_bits(m, 1, 15, 0x1fff); |
| } |
| |
| static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 1, 15, 0x1fff, n); |
| } |
| |
| /* |
| * Word 2 |
| */ |
| static inline u32 msg_dest_domain(struct tipc_msg *m) |
| { |
| return msg_word(m, 2); |
| } |
| |
| static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
| { |
| msg_set_word(m, 2, n); |
| } |
| |
| static inline u32 msg_bcgap_after(struct tipc_msg *m) |
| { |
| return msg_bits(m, 2, 16, 0xffff); |
| } |
| |
| static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 2, 16, 0xffff, n); |
| } |
| |
| static inline u32 msg_bcgap_to(struct tipc_msg *m) |
| { |
| return msg_bits(m, 2, 0, 0xffff); |
| } |
| |
| static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 2, 0, 0xffff, n); |
| } |
| |
| /* |
| * Word 4 |
| */ |
| static inline u32 msg_last_bcast(struct tipc_msg *m) |
| { |
| return msg_bits(m, 4, 16, 0xffff); |
| } |
| |
| static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
| { |
| return msg_last_bcast(m) + 1; |
| } |
| |
| static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 4, 16, 0xffff, n); |
| } |
| |
| static inline u32 msg_nof_fragms(struct tipc_msg *m) |
| { |
| return msg_bits(m, 4, 0, 0xffff); |
| } |
| |
| static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 4, 0, 0xffff, n); |
| } |
| |
| static inline u32 msg_fragm_no(struct tipc_msg *m) |
| { |
| return msg_bits(m, 4, 16, 0xffff); |
| } |
| |
| static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 4, 16, 0xffff, n); |
| } |
| |
| static inline u16 msg_next_sent(struct tipc_msg *m) |
| { |
| return msg_bits(m, 4, 0, 0xffff); |
| } |
| |
| static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 4, 0, 0xffff, n); |
| } |
| |
| static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 4, 0, 0xffff, n); |
| } |
| |
| static inline u32 msg_bc_netid(struct tipc_msg *m) |
| { |
| return msg_word(m, 4); |
| } |
| |
| static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) |
| { |
| msg_set_word(m, 4, id); |
| } |
| |
| static inline u32 msg_link_selector(struct tipc_msg *m) |
| { |
| if (msg_user(m) == MSG_FRAGMENTER) |
| m = (void *)msg_data(m); |
| return msg_bits(m, 4, 0, 1); |
| } |
| |
| /* |
| * Word 5 |
| */ |
| static inline u16 msg_session(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 16, 0xffff); |
| } |
| |
| static inline void msg_set_session(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 5, 16, 0xffff, n); |
| } |
| |
| static inline u32 msg_probe(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 0, 1); |
| } |
| |
| static inline void msg_set_probe(struct tipc_msg *m, u32 val) |
| { |
| msg_set_bits(m, 5, 0, 1, val); |
| } |
| |
| static inline char msg_net_plane(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 1, 7) + 'A'; |
| } |
| |
| static inline void msg_set_net_plane(struct tipc_msg *m, char n) |
| { |
| msg_set_bits(m, 5, 1, 7, (n - 'A')); |
| } |
| |
| static inline u32 msg_linkprio(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 4, 0x1f); |
| } |
| |
| static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 5, 4, 0x1f, n); |
| } |
| |
| static inline u32 msg_bearer_id(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 9, 0x7); |
| } |
| |
| static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 5, 9, 0x7, n); |
| } |
| |
| static inline u32 msg_redundant_link(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 12, 0x1); |
| } |
| |
| static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
| { |
| msg_set_bits(m, 5, 12, 0x1, r); |
| } |
| |
| static inline u32 msg_peer_stopping(struct tipc_msg *m) |
| { |
| return msg_bits(m, 5, 13, 0x1); |
| } |
| |
| static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) |
| { |
| msg_set_bits(m, 5, 13, 0x1, s); |
| } |
| |
| static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
| { |
| switch (msg_user(m)) { |
| case BCAST_PROTOCOL: |
| case NAME_DISTRIBUTOR: |
| case LINK_PROTOCOL: |
| return msg_bits(m, 5, 14, 0x1); |
| default: |
| return false; |
| } |
| } |
| |
| static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) |
| { |
| msg_set_bits(m, 5, 14, 0x1, invalid); |
| } |
| |
| static inline char *msg_media_addr(struct tipc_msg *m) |
| { |
| return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
| } |
| |
| static inline u32 msg_bc_gap(struct tipc_msg *m) |
| { |
| return msg_bits(m, 8, 0, 0x3ff); |
| } |
| |
| static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 8, 0, 0x3ff, n); |
| } |
| |
| /* |
| * Word 9 |
| */ |
| static inline u16 msg_msgcnt(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff); |
| } |
| |
| static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, n); |
| } |
| |
| static inline u16 msg_syncpt(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff); |
| } |
| |
| static inline void msg_set_syncpt(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, n); |
| } |
| |
| static inline u32 msg_conn_ack(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff); |
| } |
| |
| static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, n); |
| } |
| |
| static inline u16 msg_adv_win(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 0, 0xffff); |
| } |
| |
| static inline void msg_set_adv_win(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 9, 0, 0xffff, n); |
| } |
| |
| static inline u32 msg_max_pkt(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff) * 4; |
| } |
| |
| static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, (n / 4)); |
| } |
| |
| static inline u32 msg_link_tolerance(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 0, 0xffff); |
| } |
| |
| static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 9, 0, 0xffff, n); |
| } |
| |
| static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff); |
| } |
| |
| static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, n); |
| } |
| |
| static inline u16 msg_grp_bc_acked(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff); |
| } |
| |
| static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, n); |
| } |
| |
| static inline u16 msg_grp_remitted(struct tipc_msg *m) |
| { |
| return msg_bits(m, 9, 16, 0xffff); |
| } |
| |
| static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n) |
| { |
| msg_set_bits(m, 9, 16, 0xffff, n); |
| } |
| |
| /* Word 10 |
| */ |
| static inline u16 msg_grp_evt(struct tipc_msg *m) |
| { |
| return msg_bits(m, 10, 0, 0x3); |
| } |
| |
| static inline void msg_set_grp_evt(struct tipc_msg *m, int n) |
| { |
| msg_set_bits(m, 10, 0, 0x3, n); |
| } |
| |
| static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m) |
| { |
| return msg_bits(m, 10, 0, 0x1); |
| } |
| |
| static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n) |
| { |
| msg_set_bits(m, 10, 0, 0x1, n); |
| } |
| |
| static inline u16 msg_grp_bc_seqno(struct tipc_msg *m) |
| { |
| return msg_bits(m, 10, 16, 0xffff); |
| } |
| |
| static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n) |
| { |
| msg_set_bits(m, 10, 16, 0xffff, n); |
| } |
| |
| static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
| { |
| if (likely(msg_user(m) != LINK_PROTOCOL)) |
| return true; |
| if (msg_type(m) == STATE_MSG) |
| return true; |
| return false; |
| } |
| |
| static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
| { |
| if (msg_peer_link_is_up(m)) |
| return true; |
| return msg_redundant_link(m); |
| } |
| |
| static inline bool msg_is_reset(struct tipc_msg *hdr) |
| { |
| return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); |
| } |
| |
| /* Word 13 |
| */ |
| static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n) |
| { |
| msg_set_word(m, 13, n); |
| } |
| |
| static inline u32 msg_peer_net_hash(struct tipc_msg *m) |
| { |
| return msg_word(m, 13); |
| } |
| |
| /* Word 14 |
| */ |
| static inline u32 msg_sugg_node_addr(struct tipc_msg *m) |
| { |
| return msg_word(m, 14); |
| } |
| |
| static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n) |
| { |
| msg_set_word(m, 14, n); |
| } |
| |
| static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id) |
| { |
| memcpy(msg_data(hdr), id, 16); |
| } |
| |
| static inline u8 *msg_node_id(struct tipc_msg *hdr) |
| { |
| return (u8 *)msg_data(hdr); |
| } |
| |
| struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); |
| bool tipc_msg_validate(struct sk_buff **_skb); |
| bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
| void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb, |
| struct sk_buff_head *xmitq); |
| void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
| u32 hsize, u32 destnode); |
| struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
| uint data_sz, u32 dnode, u32 onode, |
| u32 dport, u32 oport, int errcode); |
| int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
| bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss, |
| u32 dnode, bool *new_bundle); |
| bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
| int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr, |
| int pktmax, struct sk_buff_head *frags); |
| int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
| int offset, int dsz, int mtu, struct sk_buff_head *list); |
| int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen, |
| int mss, struct sk_buff_head *txq); |
| bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
| bool tipc_msg_assemble(struct sk_buff_head *list); |
| bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
| bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, |
| struct sk_buff_head *cpy); |
| bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
| struct sk_buff *skb); |
| bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy); |
| |
| static inline u16 buf_seqno(struct sk_buff *skb) |
| { |
| return msg_seqno(buf_msg(skb)); |
| } |
| |
| static inline int buf_roundup_len(struct sk_buff *skb) |
| { |
| return (skb->len / 1024 + 1) * 1024; |
| } |
| |
| /* tipc_skb_peek(): peek and reserve first buffer in list |
| * @list: list to be peeked in |
| * Returns pointer to first buffer in list, if any |
| */ |
| static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, |
| spinlock_t *lock) |
| { |
| struct sk_buff *skb; |
| |
| spin_lock_bh(lock); |
| skb = skb_peek(list); |
| if (skb) |
| skb_get(skb); |
| spin_unlock_bh(lock); |
| return skb; |
| } |
| |
| /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
| * up to and including 'filter'. |
| * Note: ignoring previously tried destinations minimizes the risk of |
| * contention on the socket lock |
| * @list: list to be peeked in |
| * @filter: last destination to be ignored from search |
| * Returns a destination port number, of applicable. |
| */ |
| static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) |
| { |
| struct sk_buff *skb; |
| u32 dport = 0; |
| bool ignore = true; |
| |
| spin_lock_bh(&list->lock); |
| skb_queue_walk(list, skb) { |
| dport = msg_destport(buf_msg(skb)); |
| if (!filter || skb_queue_is_last(list, skb)) |
| break; |
| if (dport == filter) |
| ignore = false; |
| else if (!ignore) |
| break; |
| } |
| spin_unlock_bh(&list->lock); |
| return dport; |
| } |
| |
| /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list |
| * @list: list to be unlinked from |
| * @dport: selection criteria for buffer to unlink |
| */ |
| static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, |
| u32 dport) |
| { |
| struct sk_buff *_skb, *tmp, *skb = NULL; |
| |
| spin_lock_bh(&list->lock); |
| skb_queue_walk_safe(list, _skb, tmp) { |
| if (msg_destport(buf_msg(_skb)) == dport) { |
| __skb_unlink(_skb, list); |
| skb = _skb; |
| break; |
| } |
| } |
| spin_unlock_bh(&list->lock); |
| return skb; |
| } |
| |
| /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
| * @list: the new list to append. Not lock protected |
| * @head: target list. Lock protected. |
| */ |
| static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, |
| struct sk_buff_head *head) |
| { |
| spin_lock_bh(&head->lock); |
| skb_queue_splice_tail(list, head); |
| spin_unlock_bh(&head->lock); |
| } |
| |
| /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists |
| * @list: the new list to add. Lock protected. Will be reinitialized |
| * @head: target list. Lock protected. |
| */ |
| static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, |
| struct sk_buff_head *head) |
| { |
| struct sk_buff_head tmp; |
| |
| __skb_queue_head_init(&tmp); |
| |
| spin_lock_bh(&list->lock); |
| skb_queue_splice_tail_init(list, &tmp); |
| spin_unlock_bh(&list->lock); |
| tipc_skb_queue_splice_tail(&tmp, head); |
| } |
| |
| /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno |
| * @list: list to be dequeued from |
| * @seqno: seqno of the expected msg |
| * |
| * returns skb dequeued from the list if its seqno is less than or equal to |
| * the expected one, otherwise the skb is still hold |
| * |
| * Note: must be used with appropriate locks held only |
| */ |
| static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list, |
| u16 seqno) |
| { |
| struct sk_buff *skb = skb_peek(list); |
| |
| if (skb && less_eq(buf_seqno(skb), seqno)) { |
| __skb_unlink(skb, list); |
| return skb; |
| } |
| return NULL; |
| } |
| |
| #endif |