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
61 Manages a river of inbound bytes.
64 int state; // RS_* constants
65 char* accum; // bytes being accumulated
66 int nbytes; // allocated size of accumulator
67 int ipt; // insertion point in accumulator
68 int msg_size; // size of the message being accumulated
69 int flags; // RF_* constants
81 // ---------------------------- mainline rmr things ----------------
85 Manages an endpoint. Type def for this is defined in agnostic.
88 char* name; // end point name (symtab reference)
89 char* proto; // connection proto (should only be TCP, but future might bring others)
90 char* addr; // address used for connection
91 int nn_sock; // we'll keep calling it nn_ because it's less changes to the code
92 //nng_dialer dialer; // the connection specific information (retry timout etc)
93 int open; // set to true if we've connected as socket cannot be checked directly)
94 pthread_mutex_t gate; // we must serialise when we open/link to the endpoint
95 long long scounts[EPSC_SIZE]; // send counts (indexed by EPSCOUNT_* constants
98 int notify; // if we fail, we log once until a connection happens; notify if set
102 Epoll information needed for the rmr_torcv_msg() funciton
104 typedef struct epoll_stuff {
105 struct epoll_event events[1]; // wait on 1 possible events
106 struct epoll_event epe; // event definition for event to listen to
107 int ep_fd; // file des from nng
108 int poll_fd; // fd from nng
112 Context describing our world. Should be returned to user programme on
113 call to initialise, and passed as first parm on all calls to other
116 The typedef is declared in the agnostic header.
119 char* my_name; // dns name of this host to set in sender field of a message
120 char* my_ip; // the ip address we _think_ we are using sent in src_ip of the message for rts
121 int shutdown; // thread notification if we need to tell them to stop
122 int max_mlen; // max message length payload+header
123 int max_plen; // max payload length
124 int flags; // CTXFL_ constants
125 int nrtele; // number of elements in the routing table
126 int send_retries; // number of retries send_msg() should attempt if eagain/timeout indicated by nng
127 int trace_data_len; // number of bytes to allocate in header for trace data
128 int d1_len; // extra header data 1 length
129 int d2_len; // extra header data 2 length (future)
130 int nn_sock; // our general listen socket
131 int rtable_ready; // set to true when rt is received or loaded
132 route_table_t* rtable; // the active route table
133 route_table_t* old_rtable; // the previously used rt, sits here to allow for draining
134 route_table_t* new_rtable; // route table under construction
135 if_addrs_t* ip_list; // list manager of the IP addresses that are on our known interfaces
136 void* mring; // ring where msgs are queued while waiting for a call response msg
139 char* rtg_addr; // addr/port of the route table generation publisher
140 int rtg_port; // the port that the rtg listens on
142 wh_mgt_t* wormholes; // management of user opened wormholes
143 epoll_stuff_t* eps; // epoll information needed for the rcv with timeout call
145 pthread_t rtc_th; // thread info for the rtc listener
146 pthread_t mtc_th; // thread info for the multi-thread call receive process
148 // added for route manager request/states
149 rmr_whid_t rtg_whid; // wormhole id to the route manager for acks/requests
150 char* table_id; // table ID of the route table load in progress
152 // added for SI95 support
153 si_ctx_t* si_ctx; // the socket context
154 int nrivers; // allocated rivers
155 river_t* rivers; // inbound flows (index is the socket fd)
156 int max_ibm; // max size of an inbound message (river accum alloc size)
157 void* zcb_mring; // zero copy buffer mbuf ring
158 void* fd2ep; // the symtab mapping file des to endpoints for cleanup on disconnect
159 void* ephash; // hash host:port or ip:port to endpoint struct
161 pthread_mutex_t *fd2ep_gate; // we must gate add/deletes to the fd2 symtab
162 pthread_mutex_t *rtgate; // master gate for accessing/moving route tables
165 typedef uta_ctx_t uta_ctx;
169 Static prototypes for functions located here. All common protos are in the
170 agnostic header file.
173 // --- initialisation and housekeeping -------
174 static void* init( char* uproto_port, int max_msg_size, int flags );
175 static void free_ctx( uta_ctx_t* ctx );
177 // --- rt table things ---------------------------
178 static void uta_ep_failed( endpoint_t* ep );
179 static int uta_link2( uta_ctx_t *ctx, endpoint_t* ep );
181 static int rt_link2_ep( void* vctx, endpoint_t* ep );
182 static rtable_ent_t* uta_get_rte( route_table_t *rt, int sid, int mtype, int try_alt );
183 static inline int xlate_si_state( int state, int def_state );
185 // --- these have changes for si
186 static int uta_epsock_byname( uta_ctx_t* ctx, char* ep_name, int* nn_sock, endpoint_t** uepp );
187 //static int uta_epsock_rr( rtable_ent_t *rte, int group, int* more, int* nn_sock, endpoint_t** uepp, si_ctx_t* si_ctx );
188 static int uta_epsock_rr( uta_ctx_t* ctx, rtable_ent_t *rte, int group, int* more, int* nn_sock, endpoint_t** uepp );
191 // --- msg ---------------------------------------
192 static rmr_mbuf_t* alloc_zcmsg( uta_ctx_t* ctx, rmr_mbuf_t* msg, int size, int state, int trlo );
193 static rmr_mbuf_t* alloc_mbuf( uta_ctx_t* ctx, int state );
194 static void ref_tpbuf( rmr_mbuf_t* msg, size_t alen ) ;
195 static inline rmr_mbuf_t* clone_msg( rmr_mbuf_t* old_msg );
196 static rmr_mbuf_t* rcv_msg( uta_ctx_t* ctx, rmr_mbuf_t* old_msg );
197 static inline rmr_mbuf_t* realloc_msg( rmr_mbuf_t* old_msg, int tr_len );
198 static rmr_mbuf_t* send2ep( uta_ctx_t* ctx, endpoint_t* ep, rmr_mbuf_t* msg );
200 static rmr_mbuf_t* send_msg( uta_ctx_t* ctx, rmr_mbuf_t* msg, int nn_sock, int retries );
202 // ---- fd to endpoint translation ------------------------------
203 static endpoint_t* fd2ep_del( uta_ctx_t* ctx, int fd );
204 static endpoint_t* fd2ep_get( uta_ctx_t* ctx, int fd );
205 static void fd2ep_init( uta_ctx_t* ctx );
206 static void fd2ep_add( uta_ctx_t* ctx, int fd, endpoint_t* ep );