| /* |
| * net/tipc/msg.c: TIPC message header routines |
| * |
| * Copyright (c) 2000-2006, Ericsson AB |
| * Copyright (c) 2005, 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. |
| */ |
| |
| #include "core.h" |
| #include "addr.h" |
| #include "msg.h" |
| |
| u32 tipc_msg_tot_importance(struct tipc_msg *m) |
| { |
| if (likely(msg_isdata(m))) { |
| if (likely(msg_orignode(m) == tipc_own_addr)) |
| return msg_importance(m); |
| return msg_importance(m) + 4; |
| } |
| if ((msg_user(m) == MSG_FRAGMENTER) && |
| (msg_type(m) == FIRST_FRAGMENT)) |
| return msg_importance(msg_get_wrapped(m)); |
| return msg_importance(m); |
| } |
| |
| |
| void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, |
| u32 hsize, u32 destnode) |
| { |
| memset(m, 0, hsize); |
| msg_set_version(m); |
| msg_set_user(m, user); |
| msg_set_hdr_sz(m, hsize); |
| msg_set_size(m, hsize); |
| msg_set_prevnode(m, tipc_own_addr); |
| msg_set_type(m, type); |
| if (!msg_short(m)) { |
| msg_set_orignode(m, tipc_own_addr); |
| msg_set_destnode(m, destnode); |
| } |
| } |
| |
| /** |
| * tipc_msg_calc_data_size - determine total data size for message |
| */ |
| |
| int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) |
| { |
| int dsz = 0; |
| int i; |
| |
| for (i = 0; i < num_sect; i++) |
| dsz += msg_sect[i].iov_len; |
| return dsz; |
| } |
| |
| /** |
| * tipc_msg_build - create message using specified header and data |
| * |
| * Note: Caller must not hold any locks in case copy_from_user() is interrupted! |
| * |
| * Returns message data size or errno |
| */ |
| |
| int tipc_msg_build(struct tipc_msg *hdr, |
| struct iovec const *msg_sect, u32 num_sect, |
| int max_size, int usrmem, struct sk_buff** buf) |
| { |
| int dsz, sz, hsz, pos, res, cnt; |
| |
| dsz = tipc_msg_calc_data_size(msg_sect, num_sect); |
| if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { |
| *buf = NULL; |
| return -EINVAL; |
| } |
| |
| pos = hsz = msg_hdr_sz(hdr); |
| sz = hsz + dsz; |
| msg_set_size(hdr, sz); |
| if (unlikely(sz > max_size)) { |
| *buf = NULL; |
| return dsz; |
| } |
| |
| *buf = tipc_buf_acquire(sz); |
| if (!(*buf)) |
| return -ENOMEM; |
| skb_copy_to_linear_data(*buf, hdr, hsz); |
| for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { |
| if (likely(usrmem)) |
| res = !copy_from_user((*buf)->data + pos, |
| msg_sect[cnt].iov_base, |
| msg_sect[cnt].iov_len); |
| else |
| skb_copy_to_linear_data_offset(*buf, pos, |
| msg_sect[cnt].iov_base, |
| msg_sect[cnt].iov_len); |
| pos += msg_sect[cnt].iov_len; |
| } |
| if (likely(res)) |
| return dsz; |
| |
| buf_discard(*buf); |
| *buf = NULL; |
| return -EFAULT; |
| } |
| |
| #ifdef CONFIG_TIPC_DEBUG |
| |
| void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str) |
| { |
| u32 usr = msg_user(msg); |
| tipc_printf(buf, str); |
| |
| switch (usr) { |
| case MSG_BUNDLER: |
| tipc_printf(buf, "BNDL::"); |
| tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg)); |
| break; |
| case BCAST_PROTOCOL: |
| tipc_printf(buf, "BCASTP::"); |
| break; |
| case MSG_FRAGMENTER: |
| tipc_printf(buf, "FRAGM::"); |
| switch (msg_type(msg)) { |
| case FIRST_FRAGMENT: |
| tipc_printf(buf, "FIRST:"); |
| break; |
| case FRAGMENT: |
| tipc_printf(buf, "BODY:"); |
| break; |
| case LAST_FRAGMENT: |
| tipc_printf(buf, "LAST:"); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN:%x",msg_type(msg)); |
| |
| } |
| tipc_printf(buf, "NO(%u/%u):",msg_long_msgno(msg), |
| msg_fragm_no(msg)); |
| break; |
| case TIPC_LOW_IMPORTANCE: |
| case TIPC_MEDIUM_IMPORTANCE: |
| case TIPC_HIGH_IMPORTANCE: |
| case TIPC_CRITICAL_IMPORTANCE: |
| tipc_printf(buf, "DAT%u:", msg_user(msg)); |
| if (msg_short(msg)) { |
| tipc_printf(buf, "CON:"); |
| break; |
| } |
| switch (msg_type(msg)) { |
| case TIPC_CONN_MSG: |
| tipc_printf(buf, "CON:"); |
| break; |
| case TIPC_MCAST_MSG: |
| tipc_printf(buf, "MCST:"); |
| break; |
| case TIPC_NAMED_MSG: |
| tipc_printf(buf, "NAM:"); |
| break; |
| case TIPC_DIRECT_MSG: |
| tipc_printf(buf, "DIR:"); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN TYPE %u",msg_type(msg)); |
| } |
| if (msg_routed(msg) && !msg_non_seq(msg)) |
| tipc_printf(buf, "ROUT:"); |
| if (msg_reroute_cnt(msg)) |
| tipc_printf(buf, "REROUTED(%u):", |
| msg_reroute_cnt(msg)); |
| break; |
| case NAME_DISTRIBUTOR: |
| tipc_printf(buf, "NMD::"); |
| switch (msg_type(msg)) { |
| case PUBLICATION: |
| tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */ |
| break; |
| case WITHDRAWAL: |
| tipc_printf(buf, "WDRW:"); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN:%x",msg_type(msg)); |
| } |
| if (msg_routed(msg)) |
| tipc_printf(buf, "ROUT:"); |
| if (msg_reroute_cnt(msg)) |
| tipc_printf(buf, "REROUTED(%u):", |
| msg_reroute_cnt(msg)); |
| break; |
| case CONN_MANAGER: |
| tipc_printf(buf, "CONN_MNG:"); |
| switch (msg_type(msg)) { |
| case CONN_PROBE: |
| tipc_printf(buf, "PROBE:"); |
| break; |
| case CONN_PROBE_REPLY: |
| tipc_printf(buf, "PROBE_REPLY:"); |
| break; |
| case CONN_ACK: |
| tipc_printf(buf, "CONN_ACK:"); |
| tipc_printf(buf, "ACK(%u):",msg_msgcnt(msg)); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); |
| } |
| if (msg_routed(msg)) |
| tipc_printf(buf, "ROUT:"); |
| if (msg_reroute_cnt(msg)) |
| tipc_printf(buf, "REROUTED(%u):",msg_reroute_cnt(msg)); |
| break; |
| case LINK_PROTOCOL: |
| tipc_printf(buf, "PROT:TIM(%u):",msg_timestamp(msg)); |
| switch (msg_type(msg)) { |
| case STATE_MSG: |
| tipc_printf(buf, "STATE:"); |
| tipc_printf(buf, "%s:",msg_probe(msg) ? "PRB" :""); |
| tipc_printf(buf, "NXS(%u):",msg_next_sent(msg)); |
| tipc_printf(buf, "GAP(%u):",msg_seq_gap(msg)); |
| tipc_printf(buf, "LSTBC(%u):",msg_last_bcast(msg)); |
| break; |
| case RESET_MSG: |
| tipc_printf(buf, "RESET:"); |
| if (msg_size(msg) != msg_hdr_sz(msg)) |
| tipc_printf(buf, "BEAR:%s:",msg_data(msg)); |
| break; |
| case ACTIVATE_MSG: |
| tipc_printf(buf, "ACTIVATE:"); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); |
| } |
| tipc_printf(buf, "PLANE(%c):",msg_net_plane(msg)); |
| tipc_printf(buf, "SESS(%u):",msg_session(msg)); |
| break; |
| case CHANGEOVER_PROTOCOL: |
| tipc_printf(buf, "TUNL:"); |
| switch (msg_type(msg)) { |
| case DUPLICATE_MSG: |
| tipc_printf(buf, "DUPL:"); |
| break; |
| case ORIGINAL_MSG: |
| tipc_printf(buf, "ORIG:"); |
| tipc_printf(buf, "EXP(%u)",msg_msgcnt(msg)); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); |
| } |
| break; |
| case ROUTE_DISTRIBUTOR: |
| tipc_printf(buf, "ROUTING_MNG:"); |
| switch (msg_type(msg)) { |
| case EXT_ROUTING_TABLE: |
| tipc_printf(buf, "EXT_TBL:"); |
| tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); |
| break; |
| case LOCAL_ROUTING_TABLE: |
| tipc_printf(buf, "LOCAL_TBL:"); |
| tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); |
| break; |
| case SLAVE_ROUTING_TABLE: |
| tipc_printf(buf, "DP_TBL:"); |
| tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); |
| break; |
| case ROUTE_ADDITION: |
| tipc_printf(buf, "ADD:"); |
| tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); |
| break; |
| case ROUTE_REMOVAL: |
| tipc_printf(buf, "REMOVE:"); |
| tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); |
| } |
| break; |
| case LINK_CONFIG: |
| tipc_printf(buf, "CFG:"); |
| switch (msg_type(msg)) { |
| case DSC_REQ_MSG: |
| tipc_printf(buf, "DSC_REQ:"); |
| break; |
| case DSC_RESP_MSG: |
| tipc_printf(buf, "DSC_RESP:"); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN TYPE:%x:",msg_type(msg)); |
| break; |
| } |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN USER:"); |
| } |
| |
| switch (usr) { |
| case CONN_MANAGER: |
| case TIPC_LOW_IMPORTANCE: |
| case TIPC_MEDIUM_IMPORTANCE: |
| case TIPC_HIGH_IMPORTANCE: |
| case TIPC_CRITICAL_IMPORTANCE: |
| switch (msg_errcode(msg)) { |
| case TIPC_OK: |
| break; |
| case TIPC_ERR_NO_NAME: |
| tipc_printf(buf, "NO_NAME:"); |
| break; |
| case TIPC_ERR_NO_PORT: |
| tipc_printf(buf, "NO_PORT:"); |
| break; |
| case TIPC_ERR_NO_NODE: |
| tipc_printf(buf, "NO_PROC:"); |
| break; |
| case TIPC_ERR_OVERLOAD: |
| tipc_printf(buf, "OVERLOAD:"); |
| break; |
| case TIPC_CONN_SHUTDOWN: |
| tipc_printf(buf, "SHUTDOWN:"); |
| break; |
| default: |
| tipc_printf(buf, "UNKNOWN ERROR(%x):", |
| msg_errcode(msg)); |
| } |
| default:{} |
| } |
| |
| tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg)); |
| tipc_printf(buf, "SZ(%u):", msg_size(msg)); |
| tipc_printf(buf, "SQNO(%u):", msg_seqno(msg)); |
| |
| if (msg_non_seq(msg)) |
| tipc_printf(buf, "NOSEQ:"); |
| else { |
| tipc_printf(buf, "ACK(%u):", msg_ack(msg)); |
| } |
| tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg)); |
| tipc_printf(buf, "PRND(%x)", msg_prevnode(msg)); |
| |
| if (msg_isdata(msg)) { |
| if (msg_named(msg)) { |
| tipc_printf(buf, "NTYP(%u):", msg_nametype(msg)); |
| tipc_printf(buf, "NINST(%u)", msg_nameinst(msg)); |
| } |
| } |
| |
| if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) && |
| (usr != MSG_BUNDLER)) { |
| if (!msg_short(msg)) { |
| tipc_printf(buf, ":ORIG(%x:%u):", |
| msg_orignode(msg), msg_origport(msg)); |
| tipc_printf(buf, ":DEST(%x:%u):", |
| msg_destnode(msg), msg_destport(msg)); |
| } else { |
| tipc_printf(buf, ":OPRT(%u):", msg_origport(msg)); |
| tipc_printf(buf, ":DPRT(%u):", msg_destport(msg)); |
| } |
| if (msg_routed(msg) && !msg_non_seq(msg)) |
| tipc_printf(buf, ":TSEQN(%u)", msg_transp_seqno(msg)); |
| } |
| if (msg_user(msg) == NAME_DISTRIBUTOR) { |
| tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg)); |
| tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg)); |
| if (msg_routed(msg)) { |
| tipc_printf(buf, ":CSEQN(%u)", msg_transp_seqno(msg)); |
| } |
| } |
| |
| if (msg_user(msg) == LINK_CONFIG) { |
| u32* raw = (u32*)msg; |
| struct tipc_media_addr* orig = (struct tipc_media_addr*)&raw[5]; |
| tipc_printf(buf, ":REQL(%u):", msg_req_links(msg)); |
| tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg)); |
| tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg)); |
| tipc_media_addr_printf(buf, orig); |
| } |
| if (msg_user(msg) == BCAST_PROTOCOL) { |
| tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg)); |
| tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg)); |
| } |
| tipc_printf(buf, "\n"); |
| if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg))) { |
| tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
| } |
| if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT)) { |
| tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
| } |
| } |
| |
| #endif |