1 // vim: ts=4 sw=4 noet :
3 ==================================================================================
4 Copyright (c) 2019-2020 Nokia
5 Copyright (c) 2018-2020 AT&T Intellectual Property.
7 Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
11 http://www.apache.org/licenses/LICENSE-2.0
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18 ==================================================================================
22 Mnemonic: uta_si_private.h
23 Abstract: Private header information for the uta nng library functions.
24 These are structs which have specific NNG types; anything that
25 does not can be included in the common/rmr_agnostic.h header.
27 Author: E. Scott Daniels
28 Date: 31 November 2018
30 Mods: 28 Feb 2019 -- moved the majority to the agnostic header.
33 #ifndef _uta_private_h
34 #define _uta_private_h
36 // if pmode is off we don't compile in some checks in hopes of speeding things up
37 #ifndef PARANOID_CHECKS
38 # define PARANOID_CHECKS 0
42 // ---- si specific things -------------------------------------------
44 #define TP_HDR_LEN 50 // bytes added to each message for transport needs
47 #define RS_NEW 0 // river is unitialised
48 #define RS_GOOD 1 // flow is in progress
49 #define RS_RESET 2 // flow was interrupted; reset on next receive
51 #define RF_NOTIFIED 0x01 // notification made about river issue
52 #define RF_DROP 0x02 // this message is large and being dropped
54 #define TP_SZFIELD_LEN ((sizeof(uint32_t)*2)+1) // number of bytes needed for msg size in transport header
55 #define TP_SZ_MARKER '$' // marker indicating net byte order used
58 #define SI_MAX_ADDR_LEN 512
59 #define MAX_RIVERS 1024 // max number of directly mapped rivers
62 Manages a river of inbound bytes.
65 int state; // RS_* constants
66 char* accum; // bytes being accumulated
67 int nbytes; // allocated size of accumulator
68 int ipt; // insertion point in accumulator
69 int msg_size; // size of the message being accumulated
70 int flags; // RF_* constants
82 // ---------------------------- mainline rmr things ----------------
86 Manages an endpoint. Type def for this is defined in agnostic.
89 char* name; // end point name (symtab reference)
90 char* proto; // connection proto (should only be TCP, but future might bring others)
91 char* addr; // address used for connection
92 int nn_sock; // we'll keep calling it nn_ because it's less changes to the code
93 //nng_dialer dialer; // the connection specific information (retry timout etc)
94 int open; // set to true if we've connected as socket cannot be checked directly)
95 pthread_mutex_t gate; // we must serialise when we open/link to the endpoint
96 long long scounts[EPSC_SIZE]; // send counts (indexed by EPSCOUNT_* constants
99 int notify; // if we fail, we log once until a connection happens; notify if set
103 Epoll information needed for the rmr_torcv_msg() funciton
105 typedef struct epoll_stuff {
106 struct epoll_event events[1]; // wait on 1 possible events
107 struct epoll_event epe; // event definition for event to listen to
108 int ep_fd; // file des from nng
109 int poll_fd; // fd from nng
113 Context describing our world. Should be returned to user programme on
114 call to initialise, and passed as first parm on all calls to other
117 The typedef is declared in the agnostic header.
120 char* my_name; // dns name of this host to set in sender field of a message
121 char* my_ip; // the ip address we _think_ we are using sent in src_ip of the message for rts
122 int shutdown; // thread notification if we need to tell them to stop
123 int max_mlen; // max message length payload+header
124 int max_plen; // max payload length
125 int flags; // CTXFL_ constants
126 int nrtele; // number of elements in the routing table
127 int send_retries; // number of retries send_msg() should attempt if eagain/timeout indicated by nng
128 int trace_data_len; // number of bytes to allocate in header for trace data
129 int d1_len; // extra header data 1 length
130 int d2_len; // extra header data 2 length (future)
131 int nn_sock; // our general listen socket
132 int rtable_ready; // set to true when rt is received or loaded
133 route_table_t* rtable; // the active route table
134 route_table_t* old_rtable; // the previously used rt, sits here to allow for draining
135 route_table_t* new_rtable; // route table under construction
136 if_addrs_t* ip_list; // list manager of the IP addresses that are on our known interfaces
137 void* mring; // ring where msgs are queued while waiting for a call response msg
140 char* rtg_addr; // addr/port of the route table generation publisher
141 int rtg_port; // the port that the rtg listens on
143 wh_mgt_t* wormholes; // management of user opened wormholes
144 epoll_stuff_t* eps; // epoll information needed for the rcv with timeout call
146 pthread_t rtc_th; // thread info for the rtc listener
147 pthread_t mtc_th; // thread info for the multi-thread call receive process
149 // added for route manager request/states
150 rmr_whid_t rtg_whid; // wormhole id to the route manager for acks/requests
151 char* table_id; // table ID of the route table load in progress
153 // added for SI95 support
154 si_ctx_t* si_ctx; // the socket context
155 int nrivers; // allocated rivers
156 river_t* rivers; // inbound flows (index is the socket fd)
157 void* river_hash; // flows with fd values > nrivers must be mapped through the hash
158 int max_ibm; // max size of an inbound message (river accum alloc size)
159 void* zcb_mring; // zero copy buffer mbuf ring
160 void* fd2ep; // the symtab mapping file des to endpoints for cleanup on disconnect
161 void* ephash; // hash host:port or ip:port to endpoint struct
163 pthread_mutex_t *fd2ep_gate; // we must gate add/deletes to the fd2 symtab
164 pthread_mutex_t *rtgate; // master gate for accessing/moving route tables
167 typedef uta_ctx_t uta_ctx;
171 Static prototypes for functions located here. All common protos are in the
172 agnostic header file.
175 // --- initialisation and housekeeping -------
176 static void* init( char* uproto_port, int max_msg_size, int flags );
177 static void free_ctx( uta_ctx_t* ctx );
179 // --- rt table things ---------------------------
180 static void uta_ep_failed( endpoint_t* ep );
181 static int uta_link2( uta_ctx_t *ctx, endpoint_t* ep );
183 static int rt_link2_ep( void* vctx, endpoint_t* ep );
184 static rtable_ent_t* uta_get_rte( route_table_t *rt, int sid, int mtype, int try_alt );
185 static inline int xlate_si_state( int state, int def_state );
187 // --- these have changes for si
188 static int uta_epsock_byname( uta_ctx_t* ctx, char* ep_name, int* nn_sock, endpoint_t** uepp );
189 //static int uta_epsock_rr( rtable_ent_t *rte, int group, int* more, int* nn_sock, endpoint_t** uepp, si_ctx_t* si_ctx );
190 static int uta_epsock_rr( uta_ctx_t* ctx, rtable_ent_t *rte, int group, int* more, int* nn_sock, endpoint_t** uepp );
193 // --- msg ---------------------------------------
194 static rmr_mbuf_t* alloc_zcmsg( uta_ctx_t* ctx, rmr_mbuf_t* msg, int size, int state, int trlo );
195 static rmr_mbuf_t* alloc_mbuf( uta_ctx_t* ctx, int state );
196 static void ref_tpbuf( rmr_mbuf_t* msg, size_t alen ) ;
197 static inline rmr_mbuf_t* clone_msg( rmr_mbuf_t* old_msg );
198 static rmr_mbuf_t* rcv_msg( uta_ctx_t* ctx, rmr_mbuf_t* old_msg );
199 static inline rmr_mbuf_t* realloc_msg( rmr_mbuf_t* old_msg, int tr_len );
200 static rmr_mbuf_t* send2ep( uta_ctx_t* ctx, endpoint_t* ep, rmr_mbuf_t* msg );
202 static rmr_mbuf_t* send_msg( uta_ctx_t* ctx, rmr_mbuf_t* msg, int nn_sock, int retries );
204 // ---- fd to endpoint translation ------------------------------
205 static endpoint_t* fd2ep_del( uta_ctx_t* ctx, int fd );
206 static endpoint_t* fd2ep_get( uta_ctx_t* ctx, int fd );
207 static void fd2ep_init( uta_ctx_t* ctx );
208 static void fd2ep_add( uta_ctx_t* ctx, int fd, endpoint_t* ep );